Commit | Line | Data |
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e0001a05 | 1 | /* tc-xtensa.c -- Assemble Xtensa instructions. |
82704155 | 2 | Copyright (C) 2003-2019 Free Software Foundation, Inc. |
e0001a05 NC |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
e0001a05 NC |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
4b4da160 NC |
18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
e0001a05 | 20 | |
e0001a05 | 21 | #include "as.h" |
df7b86aa | 22 | #include <limits.h> |
e0001a05 NC |
23 | #include "sb.h" |
24 | #include "safe-ctype.h" | |
25 | #include "tc-xtensa.h" | |
e0001a05 NC |
26 | #include "subsegs.h" |
27 | #include "xtensa-relax.h" | |
cda2eb9e | 28 | #include "dwarf2dbg.h" |
b224e962 | 29 | #include "xtensa-istack.h" |
e0001a05 | 30 | #include "xtensa-config.h" |
b0b79343 | 31 | #include "elf/xtensa.h" |
e0001a05 | 32 | |
2caa7ca0 BW |
33 | /* Provide default values for new configuration settings. */ |
34 | #ifndef XSHAL_ABI | |
35 | #define XSHAL_ABI 0 | |
36 | #endif | |
37 | ||
e0001a05 NC |
38 | #ifndef uint32 |
39 | #define uint32 unsigned int | |
40 | #endif | |
41 | #ifndef int32 | |
42 | #define int32 signed int | |
43 | #endif | |
44 | ||
45 | /* Notes: | |
46 | ||
e0001a05 NC |
47 | Naming conventions (used somewhat inconsistently): |
48 | The xtensa_ functions are exported | |
49 | The xg_ functions are internal | |
50 | ||
51 | We also have a couple of different extensibility mechanisms. | |
52 | 1) The idiom replacement: | |
53 | This is used when a line is first parsed to | |
54 | replace an instruction pattern with another instruction | |
55 | It is currently limited to replacements of instructions | |
56 | with constant operands. | |
57 | 2) The xtensa-relax.c mechanism that has stronger instruction | |
58 | replacement patterns. When an instruction's immediate field | |
59 | does not fit the next instruction sequence is attempted. | |
60 | In addition, "narrow" opcodes are supported this way. */ | |
61 | ||
62 | ||
63 | /* Define characters with special meanings to GAS. */ | |
64 | const char comment_chars[] = "#"; | |
65 | const char line_comment_chars[] = "#"; | |
66 | const char line_separator_chars[] = ";"; | |
67 | const char EXP_CHARS[] = "eE"; | |
68 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
69 | ||
70 | ||
43cd72b9 BW |
71 | /* Flags to indicate whether the hardware supports the density and |
72 | absolute literals options. */ | |
e0001a05 | 73 | |
f7e16c2a MF |
74 | bfd_boolean density_supported; |
75 | bfd_boolean absolute_literals_supported; | |
43cd72b9 | 76 | |
43cd72b9 BW |
77 | static vliw_insn cur_vinsn; |
78 | ||
77cba8a3 | 79 | unsigned xtensa_num_pipe_stages; |
f7e16c2a | 80 | unsigned xtensa_fetch_width; |
43cd72b9 BW |
81 | |
82 | static enum debug_info_type xt_saved_debug_type = DEBUG_NONE; | |
83 | ||
84 | /* Some functions are only valid in the front end. This variable | |
c138bc38 | 85 | allows us to assert that we haven't crossed over into the |
43cd72b9 BW |
86 | back end. */ |
87 | static bfd_boolean past_xtensa_end = FALSE; | |
e0001a05 NC |
88 | |
89 | /* Flags for properties of the last instruction in a segment. */ | |
90 | #define FLAG_IS_A0_WRITER 0x1 | |
91 | #define FLAG_IS_BAD_LOOPEND 0x2 | |
92 | ||
93 | ||
94 | /* We define a special segment names ".literal" to place literals | |
95 | into. The .fini and .init sections are special because they | |
96 | contain code that is moved together by the linker. We give them | |
97 | their own special .fini.literal and .init.literal sections. */ | |
98 | ||
99 | #define LITERAL_SECTION_NAME xtensa_section_rename (".literal") | |
43cd72b9 | 100 | #define LIT4_SECTION_NAME xtensa_section_rename (".lit4") |
e0001a05 | 101 | #define INIT_SECTION_NAME xtensa_section_rename (".init") |
74869ac7 | 102 | #define FINI_SECTION_NAME xtensa_section_rename (".fini") |
e0001a05 NC |
103 | |
104 | ||
43cd72b9 | 105 | /* This type is used for the directive_stack to keep track of the |
74869ac7 BW |
106 | state of the literal collection pools. If lit_prefix is set, it is |
107 | used to determine the literal section names; otherwise, the literal | |
108 | sections are determined based on the current text section. The | |
109 | lit_seg and lit4_seg fields cache these literal sections, with the | |
110 | current_text_seg field used a tag to indicate whether the cached | |
111 | values are valid. */ | |
e0001a05 NC |
112 | |
113 | typedef struct lit_state_struct | |
114 | { | |
74869ac7 BW |
115 | char *lit_prefix; |
116 | segT current_text_seg; | |
e0001a05 | 117 | segT lit_seg; |
43cd72b9 | 118 | segT lit4_seg; |
e0001a05 NC |
119 | } lit_state; |
120 | ||
121 | static lit_state default_lit_sections; | |
122 | ||
123 | ||
74869ac7 BW |
124 | /* We keep a list of literal segments. The seg_list type is the node |
125 | for this list. The literal_head pointer is the head of the list, | |
126 | with the literal_head_h dummy node at the start. */ | |
e0001a05 NC |
127 | |
128 | typedef struct seg_list_struct | |
129 | { | |
130 | struct seg_list_struct *next; | |
131 | segT seg; | |
132 | } seg_list; | |
133 | ||
134 | static seg_list literal_head_h; | |
135 | static seg_list *literal_head = &literal_head_h; | |
e0001a05 NC |
136 | |
137 | ||
82e7541d BW |
138 | /* Lists of symbols. We keep a list of symbols that label the current |
139 | instruction, so that we can adjust the symbols when inserting alignment | |
140 | for various instructions. We also keep a list of all the symbols on | |
141 | literals, so that we can fix up those symbols when the literals are | |
142 | later moved into the text sections. */ | |
143 | ||
144 | typedef struct sym_list_struct | |
145 | { | |
146 | struct sym_list_struct *next; | |
147 | symbolS *sym; | |
148 | } sym_list; | |
149 | ||
150 | static sym_list *insn_labels = NULL; | |
151 | static sym_list *free_insn_labels = NULL; | |
152 | static sym_list *saved_insn_labels = NULL; | |
153 | ||
154 | static sym_list *literal_syms; | |
155 | ||
156 | ||
43cd72b9 BW |
157 | /* Flags to determine whether to prefer const16 or l32r |
158 | if both options are available. */ | |
159 | int prefer_const16 = 0; | |
160 | int prefer_l32r = 0; | |
161 | ||
e0001a05 NC |
162 | /* Global flag to indicate when we are emitting literals. */ |
163 | int generating_literals = 0; | |
164 | ||
43cd72b9 BW |
165 | /* The following PROPERTY table definitions are copied from |
166 | <elf/xtensa.h> and must be kept in sync with the code there. */ | |
167 | ||
168 | /* Flags in the property tables to specify whether blocks of memory | |
169 | are literals, instructions, data, or unreachable. For | |
170 | instructions, blocks that begin loop targets and branch targets are | |
171 | designated. Blocks that do not allow density, instruction | |
172 | reordering or transformation are also specified. Finally, for | |
173 | branch targets, branch target alignment priority is included. | |
174 | Alignment of the next block is specified in the current block | |
175 | and the size of the current block does not include any fill required | |
176 | to align to the next block. */ | |
177 | ||
178 | #define XTENSA_PROP_LITERAL 0x00000001 | |
179 | #define XTENSA_PROP_INSN 0x00000002 | |
180 | #define XTENSA_PROP_DATA 0x00000004 | |
181 | #define XTENSA_PROP_UNREACHABLE 0x00000008 | |
182 | /* Instruction only properties at beginning of code. */ | |
183 | #define XTENSA_PROP_INSN_LOOP_TARGET 0x00000010 | |
184 | #define XTENSA_PROP_INSN_BRANCH_TARGET 0x00000020 | |
185 | /* Instruction only properties about code. */ | |
186 | #define XTENSA_PROP_INSN_NO_DENSITY 0x00000040 | |
187 | #define XTENSA_PROP_INSN_NO_REORDER 0x00000080 | |
99ded152 BW |
188 | /* Historically, NO_TRANSFORM was a property of instructions, |
189 | but it should apply to literals under certain circumstances. */ | |
190 | #define XTENSA_PROP_NO_TRANSFORM 0x00000100 | |
43cd72b9 BW |
191 | |
192 | /* Branch target alignment information. This transmits information | |
193 | to the linker optimization about the priority of aligning a | |
194 | particular block for branch target alignment: None, low priority, | |
195 | high priority, or required. These only need to be checked in | |
196 | instruction blocks marked as XTENSA_PROP_INSN_BRANCH_TARGET. | |
197 | Common usage is | |
198 | ||
199 | switch (GET_XTENSA_PROP_BT_ALIGN (flags)) | |
200 | case XTENSA_PROP_BT_ALIGN_NONE: | |
201 | case XTENSA_PROP_BT_ALIGN_LOW: | |
202 | case XTENSA_PROP_BT_ALIGN_HIGH: | |
203 | case XTENSA_PROP_BT_ALIGN_REQUIRE: | |
204 | */ | |
205 | #define XTENSA_PROP_BT_ALIGN_MASK 0x00000600 | |
206 | ||
207 | /* No branch target alignment. */ | |
208 | #define XTENSA_PROP_BT_ALIGN_NONE 0x0 | |
209 | /* Low priority branch target alignment. */ | |
210 | #define XTENSA_PROP_BT_ALIGN_LOW 0x1 | |
211 | /* High priority branch target alignment. */ | |
212 | #define XTENSA_PROP_BT_ALIGN_HIGH 0x2 | |
213 | /* Required branch target alignment. */ | |
214 | #define XTENSA_PROP_BT_ALIGN_REQUIRE 0x3 | |
215 | ||
43cd72b9 BW |
216 | #define SET_XTENSA_PROP_BT_ALIGN(flag, align) \ |
217 | (((flag) & (~XTENSA_PROP_BT_ALIGN_MASK)) | \ | |
218 | (((align) << 9) & XTENSA_PROP_BT_ALIGN_MASK)) | |
219 | ||
220 | ||
221 | /* Alignment is specified in the block BEFORE the one that needs | |
222 | alignment. Up to 5 bits. Use GET_XTENSA_PROP_ALIGNMENT(flags) to | |
223 | get the required alignment specified as a power of 2. Use | |
224 | SET_XTENSA_PROP_ALIGNMENT(flags, pow2) to set the required | |
225 | alignment. Be careful of side effects since the SET will evaluate | |
226 | flags twice. Also, note that the SIZE of a block in the property | |
227 | table does not include the alignment size, so the alignment fill | |
228 | must be calculated to determine if two blocks are contiguous. | |
229 | TEXT_ALIGN is not currently implemented but is a placeholder for a | |
230 | possible future implementation. */ | |
231 | ||
232 | #define XTENSA_PROP_ALIGN 0x00000800 | |
233 | ||
234 | #define XTENSA_PROP_ALIGNMENT_MASK 0x0001f000 | |
235 | ||
43cd72b9 BW |
236 | #define SET_XTENSA_PROP_ALIGNMENT(flag, align) \ |
237 | (((flag) & (~XTENSA_PROP_ALIGNMENT_MASK)) | \ | |
238 | (((align) << 12) & XTENSA_PROP_ALIGNMENT_MASK)) | |
239 | ||
240 | #define XTENSA_PROP_INSN_ABSLIT 0x00020000 | |
241 | ||
242 | ||
243 | /* Structure for saving instruction and alignment per-fragment data | |
244 | that will be written to the object file. This structure is | |
245 | equivalent to the actual data that will be written out to the file | |
246 | but is easier to use. We provide a conversion to file flags | |
247 | in frag_flags_to_number. */ | |
248 | ||
249 | typedef struct frag_flags_struct frag_flags; | |
250 | ||
251 | struct frag_flags_struct | |
252 | { | |
253 | /* is_literal should only be used after xtensa_move_literals. | |
254 | If you need to check if you are generating a literal fragment, | |
255 | then use the generating_literals global. */ | |
256 | ||
257 | unsigned is_literal : 1; | |
258 | unsigned is_insn : 1; | |
259 | unsigned is_data : 1; | |
260 | unsigned is_unreachable : 1; | |
261 | ||
99ded152 BW |
262 | /* is_specific_opcode implies no_transform. */ |
263 | unsigned is_no_transform : 1; | |
264 | ||
43cd72b9 BW |
265 | struct |
266 | { | |
267 | unsigned is_loop_target : 1; | |
268 | unsigned is_branch_target : 1; /* Branch targets have a priority. */ | |
269 | unsigned bt_align_priority : 2; | |
270 | ||
271 | unsigned is_no_density : 1; | |
272 | /* no_longcalls flag does not need to be placed in the object file. */ | |
43cd72b9 BW |
273 | |
274 | unsigned is_no_reorder : 1; | |
275 | ||
276 | /* Uses absolute literal addressing for l32r. */ | |
277 | unsigned is_abslit : 1; | |
278 | } insn; | |
279 | unsigned is_align : 1; | |
280 | unsigned alignment : 5; | |
281 | }; | |
282 | ||
283 | ||
284 | /* Structure for saving information about a block of property data | |
285 | for frags that have the same flags. */ | |
286 | struct xtensa_block_info_struct | |
287 | { | |
288 | segT sec; | |
289 | bfd_vma offset; | |
290 | size_t size; | |
291 | frag_flags flags; | |
292 | struct xtensa_block_info_struct *next; | |
293 | }; | |
294 | ||
e0001a05 NC |
295 | |
296 | /* Structure for saving the current state before emitting literals. */ | |
297 | typedef struct emit_state_struct | |
298 | { | |
299 | const char *name; | |
300 | segT now_seg; | |
301 | subsegT now_subseg; | |
302 | int generating_literals; | |
303 | } emit_state; | |
304 | ||
305 | ||
43cd72b9 BW |
306 | /* Opcode placement information */ |
307 | ||
308 | typedef unsigned long long bitfield; | |
309 | #define bit_is_set(bit, bf) ((bf) & (0x01ll << (bit))) | |
310 | #define set_bit(bit, bf) ((bf) |= (0x01ll << (bit))) | |
311 | #define clear_bit(bit, bf) ((bf) &= ~(0x01ll << (bit))) | |
312 | ||
313 | #define MAX_FORMATS 32 | |
314 | ||
315 | typedef struct op_placement_info_struct | |
316 | { | |
317 | int num_formats; | |
318 | /* A number describing how restrictive the issue is for this | |
319 | opcode. For example, an opcode that fits lots of different | |
c138bc38 | 320 | formats has a high freedom, as does an opcode that fits |
43cd72b9 | 321 | only one format but many slots in that format. The most |
c138bc38 | 322 | restrictive is the opcode that fits only one slot in one |
43cd72b9 BW |
323 | format. */ |
324 | int issuef; | |
43cd72b9 | 325 | xtensa_format narrowest; |
43cd72b9 | 326 | char narrowest_size; |
b2d179be | 327 | char narrowest_slot; |
43cd72b9 BW |
328 | |
329 | /* formats is a bitfield with the Nth bit set | |
330 | if the opcode fits in the Nth xtensa_format. */ | |
331 | bitfield formats; | |
332 | ||
333 | /* slots[N]'s Mth bit is set if the op fits in the | |
334 | Mth slot of the Nth xtensa_format. */ | |
335 | bitfield slots[MAX_FORMATS]; | |
336 | ||
337 | /* A count of the number of slots in a given format | |
338 | an op can fit (i.e., the bitcount of the slot field above). */ | |
339 | char slots_in_format[MAX_FORMATS]; | |
340 | ||
341 | } op_placement_info, *op_placement_info_table; | |
342 | ||
343 | op_placement_info_table op_placement_table; | |
344 | ||
345 | ||
346 | /* Extra expression types. */ | |
347 | ||
348 | #define O_pltrel O_md1 /* like O_symbol but use a PLT reloc */ | |
349 | #define O_hi16 O_md2 /* use high 16 bits of symbolic value */ | |
350 | #define O_lo16 O_md3 /* use low 16 bits of symbolic value */ | |
1bbb5f21 | 351 | #define O_pcrel O_md4 /* value is a PC-relative offset */ |
28dbbc02 BW |
352 | #define O_tlsfunc O_md5 /* TLS_FUNC/TLSDESC_FN relocation */ |
353 | #define O_tlsarg O_md6 /* TLS_ARG/TLSDESC_ARG relocation */ | |
354 | #define O_tlscall O_md7 /* TLS_CALL relocation */ | |
355 | #define O_tpoff O_md8 /* TPOFF relocation */ | |
356 | #define O_dtpoff O_md9 /* DTPOFF relocation */ | |
43cd72b9 | 357 | |
bbdd25a8 BW |
358 | struct suffix_reloc_map |
359 | { | |
b9bb4a93 | 360 | const char *suffix; |
bbdd25a8 BW |
361 | int length; |
362 | bfd_reloc_code_real_type reloc; | |
cc34adb2 | 363 | operatorT operator; |
bbdd25a8 BW |
364 | }; |
365 | ||
366 | #define SUFFIX_MAP(str, reloc, op) { str, sizeof (str) - 1, reloc, op } | |
367 | ||
368 | static struct suffix_reloc_map suffix_relocs[] = | |
369 | { | |
370 | SUFFIX_MAP ("l", BFD_RELOC_LO16, O_lo16), | |
371 | SUFFIX_MAP ("h", BFD_RELOC_HI16, O_hi16), | |
372 | SUFFIX_MAP ("plt", BFD_RELOC_XTENSA_PLT, O_pltrel), | |
1bbb5f21 | 373 | SUFFIX_MAP ("pcrel", BFD_RELOC_32_PCREL, O_pcrel), |
28dbbc02 BW |
374 | SUFFIX_MAP ("tlsfunc", BFD_RELOC_XTENSA_TLS_FUNC, O_tlsfunc), |
375 | SUFFIX_MAP ("tlsarg", BFD_RELOC_XTENSA_TLS_ARG, O_tlsarg), | |
376 | SUFFIX_MAP ("tlscall", BFD_RELOC_XTENSA_TLS_CALL, O_tlscall), | |
377 | SUFFIX_MAP ("tpoff", BFD_RELOC_XTENSA_TLS_TPOFF, O_tpoff), | |
378 | SUFFIX_MAP ("dtpoff", BFD_RELOC_XTENSA_TLS_DTPOFF, O_dtpoff), | |
bbdd25a8 BW |
379 | }; |
380 | ||
43cd72b9 | 381 | |
e0001a05 NC |
382 | /* Directives. */ |
383 | ||
384 | typedef enum | |
385 | { | |
386 | directive_none = 0, | |
387 | directive_literal, | |
388 | directive_density, | |
43cd72b9 | 389 | directive_transform, |
e0001a05 NC |
390 | directive_freeregs, |
391 | directive_longcalls, | |
43cd72b9 BW |
392 | directive_literal_prefix, |
393 | directive_schedule, | |
394 | directive_absolute_literals, | |
395 | directive_last_directive | |
e0001a05 NC |
396 | } directiveE; |
397 | ||
398 | typedef struct | |
399 | { | |
400 | const char *name; | |
401 | bfd_boolean can_be_negated; | |
402 | } directive_infoS; | |
403 | ||
404 | const directive_infoS directive_info[] = | |
405 | { | |
43cd72b9 BW |
406 | { "none", FALSE }, |
407 | { "literal", FALSE }, | |
408 | { "density", TRUE }, | |
409 | { "transform", TRUE }, | |
410 | { "freeregs", FALSE }, | |
411 | { "longcalls", TRUE }, | |
412 | { "literal_prefix", FALSE }, | |
413 | { "schedule", TRUE }, | |
414 | { "absolute-literals", TRUE } | |
e0001a05 NC |
415 | }; |
416 | ||
417 | bfd_boolean directive_state[] = | |
418 | { | |
419 | FALSE, /* none */ | |
420 | FALSE, /* literal */ | |
e0001a05 | 421 | FALSE, /* density */ |
43cd72b9 | 422 | TRUE, /* transform */ |
e0001a05 NC |
423 | FALSE, /* freeregs */ |
424 | FALSE, /* longcalls */ | |
43cd72b9 | 425 | FALSE, /* literal_prefix */ |
2caa7ca0 | 426 | FALSE, /* schedule */ |
43cd72b9 | 427 | FALSE /* absolute_literals */ |
e0001a05 NC |
428 | }; |
429 | ||
b46824bd MF |
430 | /* A circular list of all potential and actual literal pool locations |
431 | in a segment. */ | |
432 | struct litpool_frag | |
433 | { | |
434 | struct litpool_frag *next; | |
435 | struct litpool_frag *prev; | |
436 | fragS *fragP; | |
437 | addressT addr; | |
438 | short priority; /* 1, 2, or 3 -- 1 is highest */ | |
439 | short original_priority; | |
cd665a94 | 440 | int literal_count; |
b46824bd MF |
441 | }; |
442 | ||
443 | /* Map a segment to its litpool_frag list. */ | |
444 | struct litpool_seg | |
445 | { | |
446 | struct litpool_seg *next; | |
447 | asection *seg; | |
448 | struct litpool_frag frag_list; | |
449 | int frag_count; /* since last litpool location */ | |
450 | }; | |
451 | ||
452 | static struct litpool_seg litpool_seg_list; | |
453 | ||
cd665a94 MF |
454 | /* Limit maximal size of auto litpool by half of the j range. */ |
455 | #define MAX_AUTO_POOL_LITERALS 16384 | |
456 | ||
457 | /* Limit maximal size of explicit literal pool by l32r range. */ | |
458 | #define MAX_EXPLICIT_POOL_LITERALS 65536 | |
459 | ||
460 | #define MAX_POOL_LITERALS \ | |
461 | (auto_litpools ? MAX_AUTO_POOL_LITERALS : MAX_EXPLICIT_POOL_LITERALS) | |
e0001a05 NC |
462 | |
463 | /* Directive functions. */ | |
464 | ||
7fa3d080 BW |
465 | static void xtensa_begin_directive (int); |
466 | static void xtensa_end_directive (int); | |
74869ac7 | 467 | static void xtensa_literal_prefix (void); |
7fa3d080 BW |
468 | static void xtensa_literal_position (int); |
469 | static void xtensa_literal_pseudo (int); | |
470 | static void xtensa_frequency_pseudo (int); | |
471 | static void xtensa_elf_cons (int); | |
fb227da0 | 472 | static void xtensa_leb128 (int); |
e0001a05 | 473 | |
7fa3d080 | 474 | /* Parsing and Idiom Translation. */ |
e0001a05 | 475 | |
7fa3d080 | 476 | static bfd_reloc_code_real_type xtensa_elf_suffix (char **, expressionS *); |
e0001a05 | 477 | |
e0001a05 NC |
478 | /* Various Other Internal Functions. */ |
479 | ||
84b08ed9 BW |
480 | extern bfd_boolean xg_is_single_relaxable_insn (TInsn *, TInsn *, bfd_boolean); |
481 | static bfd_boolean xg_build_to_insn (TInsn *, TInsn *, BuildInstr *); | |
7fa3d080 BW |
482 | static void xtensa_mark_literal_pool_location (void); |
483 | static addressT get_expanded_loop_offset (xtensa_opcode); | |
484 | static fragS *get_literal_pool_location (segT); | |
485 | static void set_literal_pool_location (segT, fragS *); | |
486 | static void xtensa_set_frag_assembly_state (fragS *); | |
487 | static void finish_vinsn (vliw_insn *); | |
488 | static bfd_boolean emit_single_op (TInsn *); | |
34e41783 | 489 | static int total_frag_text_expansion (fragS *); |
a82c7d90 DW |
490 | static bfd_boolean use_trampolines = TRUE; |
491 | static void xtensa_check_frag_count (void); | |
492 | static void xtensa_create_trampoline_frag (bfd_boolean); | |
493 | static void xtensa_maybe_create_trampoline_frag (void); | |
494 | struct trampoline_frag; | |
46888d71 MF |
495 | static int init_trampoline_frag (fragS *); |
496 | static fixS *xg_append_jump (fragS *fragP, symbolS *sym, offsetT offset); | |
b46824bd MF |
497 | static void xtensa_maybe_create_literal_pool_frag (bfd_boolean, bfd_boolean); |
498 | static bfd_boolean auto_litpools = FALSE; | |
cd665a94 | 499 | static int auto_litpool_limit = 0; |
54879176 | 500 | static bfd_boolean xtensa_is_init_fini (segT seg); |
e0001a05 NC |
501 | |
502 | /* Alignment Functions. */ | |
503 | ||
d77b99c9 BW |
504 | static int get_text_align_power (unsigned); |
505 | static int get_text_align_max_fill_size (int, bfd_boolean, bfd_boolean); | |
664df4e4 | 506 | static int branch_align_power (segT); |
e0001a05 NC |
507 | |
508 | /* Helpers for xtensa_relax_frag(). */ | |
509 | ||
7fa3d080 | 510 | static long relax_frag_add_nop (fragS *); |
e0001a05 | 511 | |
b08b5071 | 512 | /* Accessors for additional per-subsegment information. */ |
e0001a05 | 513 | |
7fa3d080 BW |
514 | static unsigned get_last_insn_flags (segT, subsegT); |
515 | static void set_last_insn_flags (segT, subsegT, unsigned, bfd_boolean); | |
b08b5071 BW |
516 | static float get_subseg_total_freq (segT, subsegT); |
517 | static float get_subseg_target_freq (segT, subsegT); | |
518 | static void set_subseg_freq (segT, subsegT, float, float); | |
e0001a05 NC |
519 | |
520 | /* Segment list functions. */ | |
521 | ||
7fa3d080 BW |
522 | static void xtensa_move_literals (void); |
523 | static void xtensa_reorder_segments (void); | |
524 | static void xtensa_switch_to_literal_fragment (emit_state *); | |
525 | static void xtensa_switch_to_non_abs_literal_fragment (emit_state *); | |
526 | static void xtensa_switch_section_emit_state (emit_state *, segT, subsegT); | |
527 | static void xtensa_restore_emit_state (emit_state *); | |
74869ac7 | 528 | static segT cache_literal_section (bfd_boolean); |
e0001a05 | 529 | |
43cd72b9 BW |
530 | /* op_placement_info functions. */ |
531 | ||
7fa3d080 BW |
532 | static void init_op_placement_info_table (void); |
533 | extern bfd_boolean opcode_fits_format_slot (xtensa_opcode, xtensa_format, int); | |
534 | static int xg_get_single_size (xtensa_opcode); | |
535 | static xtensa_format xg_get_single_format (xtensa_opcode); | |
b2d179be | 536 | static int xg_get_single_slot (xtensa_opcode); |
43cd72b9 | 537 | |
e0001a05 | 538 | /* TInsn and IStack functions. */ |
43cd72b9 | 539 | |
7fa3d080 BW |
540 | static bfd_boolean tinsn_has_symbolic_operands (const TInsn *); |
541 | static bfd_boolean tinsn_has_invalid_symbolic_operands (const TInsn *); | |
542 | static bfd_boolean tinsn_has_complex_operands (const TInsn *); | |
543 | static bfd_boolean tinsn_to_insnbuf (TInsn *, xtensa_insnbuf); | |
544 | static bfd_boolean tinsn_check_arguments (const TInsn *); | |
545 | static void tinsn_from_chars (TInsn *, char *, int); | |
546 | static void tinsn_immed_from_frag (TInsn *, fragS *, int); | |
547 | static int get_num_stack_text_bytes (IStack *); | |
548 | static int get_num_stack_literal_bytes (IStack *); | |
a82c7d90 | 549 | static bfd_boolean tinsn_to_slotbuf (xtensa_format, int, TInsn *, xtensa_insnbuf); |
e0001a05 | 550 | |
43cd72b9 BW |
551 | /* vliw_insn functions. */ |
552 | ||
7fa3d080 | 553 | static void xg_init_vinsn (vliw_insn *); |
d8392fd9 | 554 | static void xg_copy_vinsn (vliw_insn *, vliw_insn *); |
7fa3d080 BW |
555 | static void xg_clear_vinsn (vliw_insn *); |
556 | static bfd_boolean vinsn_has_specific_opcodes (vliw_insn *); | |
557 | static void xg_free_vinsn (vliw_insn *); | |
43cd72b9 | 558 | static bfd_boolean vinsn_to_insnbuf |
7fa3d080 BW |
559 | (vliw_insn *, char *, fragS *, bfd_boolean); |
560 | static void vinsn_from_chars (vliw_insn *, char *); | |
43cd72b9 | 561 | |
e0001a05 | 562 | /* Expression Utilities. */ |
43cd72b9 | 563 | |
7fa3d080 BW |
564 | bfd_boolean expr_is_const (const expressionS *); |
565 | offsetT get_expr_const (const expressionS *); | |
566 | void set_expr_const (expressionS *, offsetT); | |
567 | bfd_boolean expr_is_register (const expressionS *); | |
568 | offsetT get_expr_register (const expressionS *); | |
569 | void set_expr_symbol_offset (expressionS *, symbolS *, offsetT); | |
7fa3d080 BW |
570 | bfd_boolean expr_is_equal (expressionS *, expressionS *); |
571 | static void copy_expr (expressionS *, const expressionS *); | |
e0001a05 | 572 | |
9456465c BW |
573 | /* Section renaming. */ |
574 | ||
7fa3d080 | 575 | static void build_section_rename (const char *); |
e0001a05 | 576 | |
e0001a05 NC |
577 | |
578 | /* ISA imported from bfd. */ | |
579 | extern xtensa_isa xtensa_default_isa; | |
580 | ||
581 | extern int target_big_endian; | |
582 | ||
583 | static xtensa_opcode xtensa_addi_opcode; | |
584 | static xtensa_opcode xtensa_addmi_opcode; | |
585 | static xtensa_opcode xtensa_call0_opcode; | |
586 | static xtensa_opcode xtensa_call4_opcode; | |
587 | static xtensa_opcode xtensa_call8_opcode; | |
588 | static xtensa_opcode xtensa_call12_opcode; | |
589 | static xtensa_opcode xtensa_callx0_opcode; | |
590 | static xtensa_opcode xtensa_callx4_opcode; | |
591 | static xtensa_opcode xtensa_callx8_opcode; | |
592 | static xtensa_opcode xtensa_callx12_opcode; | |
43cd72b9 | 593 | static xtensa_opcode xtensa_const16_opcode; |
e0001a05 | 594 | static xtensa_opcode xtensa_entry_opcode; |
d12f9798 | 595 | static xtensa_opcode xtensa_extui_opcode; |
43cd72b9 BW |
596 | static xtensa_opcode xtensa_movi_opcode; |
597 | static xtensa_opcode xtensa_movi_n_opcode; | |
e0001a05 | 598 | static xtensa_opcode xtensa_isync_opcode; |
19e8f41a | 599 | static xtensa_opcode xtensa_j_opcode; |
e0001a05 | 600 | static xtensa_opcode xtensa_jx_opcode; |
43cd72b9 | 601 | static xtensa_opcode xtensa_l32r_opcode; |
e0001a05 NC |
602 | static xtensa_opcode xtensa_loop_opcode; |
603 | static xtensa_opcode xtensa_loopnez_opcode; | |
604 | static xtensa_opcode xtensa_loopgtz_opcode; | |
43cd72b9 | 605 | static xtensa_opcode xtensa_nop_opcode; |
e0001a05 NC |
606 | static xtensa_opcode xtensa_nop_n_opcode; |
607 | static xtensa_opcode xtensa_or_opcode; | |
608 | static xtensa_opcode xtensa_ret_opcode; | |
609 | static xtensa_opcode xtensa_ret_n_opcode; | |
610 | static xtensa_opcode xtensa_retw_opcode; | |
611 | static xtensa_opcode xtensa_retw_n_opcode; | |
43cd72b9 | 612 | static xtensa_opcode xtensa_rsr_lcount_opcode; |
e0001a05 | 613 | static xtensa_opcode xtensa_waiti_opcode; |
62af60e2 | 614 | static int config_max_slots = 0; |
e0001a05 NC |
615 | |
616 | \f | |
617 | /* Command-line Options. */ | |
618 | ||
619 | bfd_boolean use_literal_section = TRUE; | |
19fc3723 | 620 | enum flix_level produce_flix = FLIX_ALL; |
e0001a05 | 621 | static bfd_boolean align_targets = TRUE; |
43cd72b9 | 622 | static bfd_boolean warn_unaligned_branch_targets = FALSE; |
e0001a05 | 623 | static bfd_boolean has_a0_b_retw = FALSE; |
43cd72b9 BW |
624 | static bfd_boolean workaround_a0_b_retw = FALSE; |
625 | static bfd_boolean workaround_b_j_loop_end = FALSE; | |
626 | static bfd_boolean workaround_short_loop = FALSE; | |
e0001a05 | 627 | static bfd_boolean maybe_has_short_loop = FALSE; |
43cd72b9 | 628 | static bfd_boolean workaround_close_loop_end = FALSE; |
e0001a05 | 629 | static bfd_boolean maybe_has_close_loop_end = FALSE; |
03aaa593 | 630 | static bfd_boolean enforce_three_byte_loop_align = FALSE; |
9632a526 | 631 | static bfd_boolean opt_linkrelax = TRUE; |
e0001a05 | 632 | |
43cd72b9 BW |
633 | /* When workaround_short_loops is TRUE, all loops with early exits must |
634 | have at least 3 instructions. workaround_all_short_loops is a modifier | |
635 | to the workaround_short_loop flag. In addition to the | |
636 | workaround_short_loop actions, all straightline loopgtz and loopnez | |
637 | must have at least 3 instructions. */ | |
e0001a05 | 638 | |
43cd72b9 | 639 | static bfd_boolean workaround_all_short_loops = FALSE; |
e0001a05 | 640 | |
8255c61b MF |
641 | /* Generate individual property section for every section. |
642 | This option is defined in BDF library. */ | |
643 | extern bfd_boolean elf32xtensa_separate_props; | |
7fa3d080 BW |
644 | |
645 | static void | |
646 | xtensa_setup_hw_workarounds (int earliest, int latest) | |
647 | { | |
648 | if (earliest > latest) | |
649 | as_fatal (_("illegal range of target hardware versions")); | |
650 | ||
651 | /* Enable all workarounds for pre-T1050.0 hardware. */ | |
652 | if (earliest < 105000 || latest < 105000) | |
653 | { | |
654 | workaround_a0_b_retw |= TRUE; | |
655 | workaround_b_j_loop_end |= TRUE; | |
656 | workaround_short_loop |= TRUE; | |
657 | workaround_close_loop_end |= TRUE; | |
658 | workaround_all_short_loops |= TRUE; | |
03aaa593 | 659 | enforce_three_byte_loop_align = TRUE; |
7fa3d080 BW |
660 | } |
661 | } | |
662 | ||
663 | ||
e0001a05 NC |
664 | enum |
665 | { | |
666 | option_density = OPTION_MD_BASE, | |
667 | option_no_density, | |
668 | ||
19fc3723 SA |
669 | option_flix, |
670 | option_no_generate_flix, | |
671 | option_no_flix, | |
672 | ||
e0001a05 NC |
673 | option_relax, |
674 | option_no_relax, | |
675 | ||
43cd72b9 BW |
676 | option_link_relax, |
677 | option_no_link_relax, | |
678 | ||
e0001a05 NC |
679 | option_generics, |
680 | option_no_generics, | |
681 | ||
43cd72b9 BW |
682 | option_transform, |
683 | option_no_transform, | |
684 | ||
e0001a05 NC |
685 | option_text_section_literals, |
686 | option_no_text_section_literals, | |
687 | ||
43cd72b9 BW |
688 | option_absolute_literals, |
689 | option_no_absolute_literals, | |
690 | ||
e0001a05 NC |
691 | option_align_targets, |
692 | option_no_align_targets, | |
693 | ||
43cd72b9 | 694 | option_warn_unaligned_targets, |
e0001a05 NC |
695 | |
696 | option_longcalls, | |
697 | option_no_longcalls, | |
698 | ||
699 | option_workaround_a0_b_retw, | |
700 | option_no_workaround_a0_b_retw, | |
701 | ||
702 | option_workaround_b_j_loop_end, | |
703 | option_no_workaround_b_j_loop_end, | |
704 | ||
705 | option_workaround_short_loop, | |
706 | option_no_workaround_short_loop, | |
707 | ||
708 | option_workaround_all_short_loops, | |
709 | option_no_workaround_all_short_loops, | |
710 | ||
711 | option_workaround_close_loop_end, | |
712 | option_no_workaround_close_loop_end, | |
713 | ||
714 | option_no_workarounds, | |
715 | ||
e0001a05 | 716 | option_rename_section_name, |
e0001a05 | 717 | |
43cd72b9 BW |
718 | option_prefer_l32r, |
719 | option_prefer_const16, | |
720 | ||
a82c7d90 DW |
721 | option_target_hardware, |
722 | ||
723 | option_trampolines, | |
724 | option_no_trampolines, | |
b46824bd MF |
725 | |
726 | option_auto_litpools, | |
727 | option_no_auto_litpools, | |
728 | option_auto_litpool_limit, | |
8255c61b MF |
729 | |
730 | option_separate_props, | |
731 | option_no_separate_props, | |
e0001a05 NC |
732 | }; |
733 | ||
734 | const char *md_shortopts = ""; | |
735 | ||
736 | struct option md_longopts[] = | |
737 | { | |
43cd72b9 BW |
738 | { "density", no_argument, NULL, option_density }, |
739 | { "no-density", no_argument, NULL, option_no_density }, | |
740 | ||
19fc3723 SA |
741 | { "flix", no_argument, NULL, option_flix }, |
742 | { "no-generate-flix", no_argument, NULL, option_no_generate_flix }, | |
743 | { "no-allow-flix", no_argument, NULL, option_no_flix }, | |
744 | ||
43cd72b9 BW |
745 | /* Both "relax" and "generics" are deprecated and treated as equivalent |
746 | to the "transform" option. */ | |
747 | { "relax", no_argument, NULL, option_relax }, | |
748 | { "no-relax", no_argument, NULL, option_no_relax }, | |
749 | { "generics", no_argument, NULL, option_generics }, | |
750 | { "no-generics", no_argument, NULL, option_no_generics }, | |
751 | ||
752 | { "transform", no_argument, NULL, option_transform }, | |
753 | { "no-transform", no_argument, NULL, option_no_transform }, | |
754 | { "text-section-literals", no_argument, NULL, option_text_section_literals }, | |
755 | { "no-text-section-literals", no_argument, NULL, | |
756 | option_no_text_section_literals }, | |
757 | { "absolute-literals", no_argument, NULL, option_absolute_literals }, | |
758 | { "no-absolute-literals", no_argument, NULL, option_no_absolute_literals }, | |
e0001a05 NC |
759 | /* This option was changed from -align-target to -target-align |
760 | because it conflicted with the "-al" option. */ | |
43cd72b9 | 761 | { "target-align", no_argument, NULL, option_align_targets }, |
7fa3d080 BW |
762 | { "no-target-align", no_argument, NULL, option_no_align_targets }, |
763 | { "warn-unaligned-targets", no_argument, NULL, | |
764 | option_warn_unaligned_targets }, | |
43cd72b9 BW |
765 | { "longcalls", no_argument, NULL, option_longcalls }, |
766 | { "no-longcalls", no_argument, NULL, option_no_longcalls }, | |
767 | ||
768 | { "no-workaround-a0-b-retw", no_argument, NULL, | |
769 | option_no_workaround_a0_b_retw }, | |
770 | { "workaround-a0-b-retw", no_argument, NULL, option_workaround_a0_b_retw }, | |
e0001a05 | 771 | |
43cd72b9 BW |
772 | { "no-workaround-b-j-loop-end", no_argument, NULL, |
773 | option_no_workaround_b_j_loop_end }, | |
774 | { "workaround-b-j-loop-end", no_argument, NULL, | |
775 | option_workaround_b_j_loop_end }, | |
e0001a05 | 776 | |
43cd72b9 BW |
777 | { "no-workaround-short-loops", no_argument, NULL, |
778 | option_no_workaround_short_loop }, | |
7fa3d080 BW |
779 | { "workaround-short-loops", no_argument, NULL, |
780 | option_workaround_short_loop }, | |
e0001a05 | 781 | |
43cd72b9 BW |
782 | { "no-workaround-all-short-loops", no_argument, NULL, |
783 | option_no_workaround_all_short_loops }, | |
784 | { "workaround-all-short-loop", no_argument, NULL, | |
785 | option_workaround_all_short_loops }, | |
786 | ||
787 | { "prefer-l32r", no_argument, NULL, option_prefer_l32r }, | |
788 | { "prefer-const16", no_argument, NULL, option_prefer_const16 }, | |
789 | ||
790 | { "no-workarounds", no_argument, NULL, option_no_workarounds }, | |
791 | ||
792 | { "no-workaround-close-loop-end", no_argument, NULL, | |
793 | option_no_workaround_close_loop_end }, | |
794 | { "workaround-close-loop-end", no_argument, NULL, | |
795 | option_workaround_close_loop_end }, | |
e0001a05 | 796 | |
7fa3d080 | 797 | { "rename-section", required_argument, NULL, option_rename_section_name }, |
e0001a05 | 798 | |
43cd72b9 BW |
799 | { "link-relax", no_argument, NULL, option_link_relax }, |
800 | { "no-link-relax", no_argument, NULL, option_no_link_relax }, | |
801 | ||
802 | { "target-hardware", required_argument, NULL, option_target_hardware }, | |
803 | ||
a82c7d90 DW |
804 | { "trampolines", no_argument, NULL, option_trampolines }, |
805 | { "no-trampolines", no_argument, NULL, option_no_trampolines }, | |
806 | ||
b46824bd MF |
807 | { "auto-litpools", no_argument, NULL, option_auto_litpools }, |
808 | { "no-auto-litpools", no_argument, NULL, option_no_auto_litpools }, | |
809 | { "auto-litpool-limit", required_argument, NULL, option_auto_litpool_limit }, | |
810 | ||
8255c61b MF |
811 | { "separate-prop-tables", no_argument, NULL, option_separate_props }, |
812 | ||
43cd72b9 | 813 | { NULL, no_argument, NULL, 0 } |
e0001a05 NC |
814 | }; |
815 | ||
816 | size_t md_longopts_size = sizeof md_longopts; | |
817 | ||
818 | ||
819 | int | |
17b9d67d | 820 | md_parse_option (int c, const char *arg) |
e0001a05 NC |
821 | { |
822 | switch (c) | |
823 | { | |
824 | case option_density: | |
43cd72b9 | 825 | as_warn (_("--density option is ignored")); |
e0001a05 NC |
826 | return 1; |
827 | case option_no_density: | |
43cd72b9 | 828 | as_warn (_("--no-density option is ignored")); |
e0001a05 | 829 | return 1; |
43cd72b9 | 830 | case option_link_relax: |
9632a526 | 831 | opt_linkrelax = TRUE; |
e0001a05 | 832 | return 1; |
43cd72b9 | 833 | case option_no_link_relax: |
9632a526 | 834 | opt_linkrelax = FALSE; |
e0001a05 | 835 | return 1; |
19fc3723 SA |
836 | case option_flix: |
837 | produce_flix = FLIX_ALL; | |
838 | return 1; | |
839 | case option_no_generate_flix: | |
840 | produce_flix = FLIX_NO_GENERATE; | |
841 | return 1; | |
842 | case option_no_flix: | |
843 | produce_flix = FLIX_NONE; | |
844 | return 1; | |
43cd72b9 BW |
845 | case option_generics: |
846 | as_warn (_("--generics is deprecated; use --transform instead")); | |
847 | return md_parse_option (option_transform, arg); | |
848 | case option_no_generics: | |
849 | as_warn (_("--no-generics is deprecated; use --no-transform instead")); | |
850 | return md_parse_option (option_no_transform, arg); | |
851 | case option_relax: | |
852 | as_warn (_("--relax is deprecated; use --transform instead")); | |
853 | return md_parse_option (option_transform, arg); | |
854 | case option_no_relax: | |
855 | as_warn (_("--no-relax is deprecated; use --no-transform instead")); | |
856 | return md_parse_option (option_no_transform, arg); | |
e0001a05 NC |
857 | case option_longcalls: |
858 | directive_state[directive_longcalls] = TRUE; | |
859 | return 1; | |
860 | case option_no_longcalls: | |
861 | directive_state[directive_longcalls] = FALSE; | |
862 | return 1; | |
863 | case option_text_section_literals: | |
864 | use_literal_section = FALSE; | |
865 | return 1; | |
866 | case option_no_text_section_literals: | |
867 | use_literal_section = TRUE; | |
868 | return 1; | |
43cd72b9 BW |
869 | case option_absolute_literals: |
870 | if (!absolute_literals_supported) | |
871 | { | |
872 | as_fatal (_("--absolute-literals option not supported in this Xtensa configuration")); | |
873 | return 0; | |
874 | } | |
875 | directive_state[directive_absolute_literals] = TRUE; | |
876 | return 1; | |
877 | case option_no_absolute_literals: | |
878 | directive_state[directive_absolute_literals] = FALSE; | |
879 | return 1; | |
880 | ||
e0001a05 NC |
881 | case option_workaround_a0_b_retw: |
882 | workaround_a0_b_retw = TRUE; | |
e0001a05 NC |
883 | return 1; |
884 | case option_no_workaround_a0_b_retw: | |
885 | workaround_a0_b_retw = FALSE; | |
e0001a05 NC |
886 | return 1; |
887 | case option_workaround_b_j_loop_end: | |
888 | workaround_b_j_loop_end = TRUE; | |
e0001a05 NC |
889 | return 1; |
890 | case option_no_workaround_b_j_loop_end: | |
891 | workaround_b_j_loop_end = FALSE; | |
e0001a05 NC |
892 | return 1; |
893 | ||
894 | case option_workaround_short_loop: | |
895 | workaround_short_loop = TRUE; | |
e0001a05 NC |
896 | return 1; |
897 | case option_no_workaround_short_loop: | |
898 | workaround_short_loop = FALSE; | |
e0001a05 NC |
899 | return 1; |
900 | ||
901 | case option_workaround_all_short_loops: | |
902 | workaround_all_short_loops = TRUE; | |
e0001a05 NC |
903 | return 1; |
904 | case option_no_workaround_all_short_loops: | |
905 | workaround_all_short_loops = FALSE; | |
e0001a05 NC |
906 | return 1; |
907 | ||
908 | case option_workaround_close_loop_end: | |
909 | workaround_close_loop_end = TRUE; | |
e0001a05 NC |
910 | return 1; |
911 | case option_no_workaround_close_loop_end: | |
912 | workaround_close_loop_end = FALSE; | |
e0001a05 NC |
913 | return 1; |
914 | ||
915 | case option_no_workarounds: | |
916 | workaround_a0_b_retw = FALSE; | |
e0001a05 | 917 | workaround_b_j_loop_end = FALSE; |
e0001a05 | 918 | workaround_short_loop = FALSE; |
e0001a05 | 919 | workaround_all_short_loops = FALSE; |
e0001a05 | 920 | workaround_close_loop_end = FALSE; |
e0001a05 | 921 | return 1; |
43cd72b9 | 922 | |
e0001a05 NC |
923 | case option_align_targets: |
924 | align_targets = TRUE; | |
925 | return 1; | |
926 | case option_no_align_targets: | |
927 | align_targets = FALSE; | |
928 | return 1; | |
929 | ||
43cd72b9 BW |
930 | case option_warn_unaligned_targets: |
931 | warn_unaligned_branch_targets = TRUE; | |
e0001a05 NC |
932 | return 1; |
933 | ||
e0001a05 NC |
934 | case option_rename_section_name: |
935 | build_section_rename (arg); | |
936 | return 1; | |
e0001a05 NC |
937 | |
938 | case 'Q': | |
939 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
940 | should be emitted or not. FIXME: Not implemented. */ | |
941 | return 1; | |
c138bc38 | 942 | |
43cd72b9 BW |
943 | case option_prefer_l32r: |
944 | if (prefer_const16) | |
945 | as_fatal (_("prefer-l32r conflicts with prefer-const16")); | |
946 | prefer_l32r = 1; | |
947 | return 1; | |
948 | ||
949 | case option_prefer_const16: | |
950 | if (prefer_l32r) | |
951 | as_fatal (_("prefer-const16 conflicts with prefer-l32r")); | |
952 | prefer_const16 = 1; | |
953 | return 1; | |
954 | ||
c138bc38 | 955 | case option_target_hardware: |
43cd72b9 BW |
956 | { |
957 | int earliest, latest = 0; | |
17b9d67d | 958 | char *end; |
43cd72b9 BW |
959 | if (*arg == 0 || *arg == '-') |
960 | as_fatal (_("invalid target hardware version")); | |
961 | ||
17b9d67d | 962 | earliest = strtol (arg, &end, 0); |
43cd72b9 | 963 | |
17b9d67d | 964 | if (*end == 0) |
43cd72b9 | 965 | latest = earliest; |
17b9d67d | 966 | else if (*end == '-') |
43cd72b9 | 967 | { |
17b9d67d | 968 | if (*++end == 0) |
43cd72b9 | 969 | as_fatal (_("invalid target hardware version")); |
17b9d67d | 970 | latest = strtol (end, &end, 0); |
43cd72b9 | 971 | } |
17b9d67d | 972 | if (*end != 0) |
43cd72b9 BW |
973 | as_fatal (_("invalid target hardware version")); |
974 | ||
975 | xtensa_setup_hw_workarounds (earliest, latest); | |
976 | return 1; | |
977 | } | |
978 | ||
979 | case option_transform: | |
980 | /* This option has no affect other than to use the defaults, | |
981 | which are already set. */ | |
982 | return 1; | |
983 | ||
984 | case option_no_transform: | |
985 | /* This option turns off all transformations of any kind. | |
986 | However, because we want to preserve the state of other | |
987 | directives, we only change its own field. Thus, before | |
988 | you perform any transformation, always check if transform | |
989 | is available. If you use the functions we provide for this | |
990 | purpose, you will be ok. */ | |
991 | directive_state[directive_transform] = FALSE; | |
992 | return 1; | |
993 | ||
a82c7d90 DW |
994 | case option_trampolines: |
995 | use_trampolines = TRUE; | |
996 | return 1; | |
997 | ||
998 | case option_no_trampolines: | |
999 | use_trampolines = FALSE; | |
1000 | return 1; | |
1001 | ||
b46824bd MF |
1002 | case option_auto_litpools: |
1003 | auto_litpools = TRUE; | |
1004 | use_literal_section = FALSE; | |
cd665a94 MF |
1005 | if (auto_litpool_limit <= 0) |
1006 | auto_litpool_limit = MAX_AUTO_POOL_LITERALS / 2; | |
b46824bd MF |
1007 | return 1; |
1008 | ||
1009 | case option_no_auto_litpools: | |
1010 | auto_litpools = FALSE; | |
1011 | auto_litpool_limit = -1; | |
1012 | return 1; | |
1013 | ||
1014 | case option_auto_litpool_limit: | |
1015 | { | |
1016 | int value = 0; | |
17b9d67d | 1017 | char *end; |
b46824bd MF |
1018 | if (auto_litpool_limit < 0) |
1019 | as_fatal (_("no-auto-litpools is incompatible with auto-litpool-limit")); | |
1020 | if (*arg == 0 || *arg == '-') | |
1021 | as_fatal (_("invalid auto-litpool-limit argument")); | |
17b9d67d TS |
1022 | value = strtol (arg, &end, 10); |
1023 | if (*end != 0) | |
b46824bd MF |
1024 | as_fatal (_("invalid auto-litpool-limit argument")); |
1025 | if (value < 100 || value > 10000) | |
1026 | as_fatal (_("invalid auto-litpool-limit argument (range is 100-10000)")); | |
1027 | auto_litpool_limit = value; | |
1028 | auto_litpools = TRUE; | |
1029 | use_literal_section = FALSE; | |
1030 | return 1; | |
1031 | } | |
1032 | ||
8255c61b MF |
1033 | case option_separate_props: |
1034 | elf32xtensa_separate_props = TRUE; | |
1035 | return 1; | |
1036 | ||
1037 | case option_no_separate_props: | |
1038 | elf32xtensa_separate_props = FALSE; | |
1039 | return 1; | |
1040 | ||
e0001a05 NC |
1041 | default: |
1042 | return 0; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | ||
1047 | void | |
7fa3d080 | 1048 | md_show_usage (FILE *stream) |
e0001a05 | 1049 | { |
43cd72b9 BW |
1050 | fputs ("\n\ |
1051 | Xtensa options:\n\ | |
9456465c BW |
1052 | --[no-]text-section-literals\n\ |
1053 | [Do not] put literals in the text section\n\ | |
1054 | --[no-]absolute-literals\n\ | |
1055 | [Do not] default to use non-PC-relative literals\n\ | |
1056 | --[no-]target-align [Do not] try to align branch targets\n\ | |
1057 | --[no-]longcalls [Do not] emit 32-bit call sequences\n\ | |
1058 | --[no-]transform [Do not] transform instructions\n\ | |
19fc3723 SA |
1059 | --flix both allow hand-written and generate flix bundles\n\ |
1060 | --no-generate-flix allow hand-written but do not generate\n\ | |
1061 | flix bundles\n\ | |
1062 | --no-allow-flix neither allow hand-written nor generate\n\ | |
1063 | flix bundles\n\ | |
a82c7d90 DW |
1064 | --rename-section old=new Rename section 'old' to 'new'\n\ |
1065 | --[no-]trampolines [Do not] generate trampolines (jumps to jumps)\n\ | |
b46824bd MF |
1066 | when jumps do not reach their targets\n\ |
1067 | --[no-]auto-litpools [Do not] automatically create literal pools\n\ | |
1068 | --auto-litpool-limit=<value>\n\ | |
1069 | (range 100-10000) Maximum number of blocks of\n\ | |
1070 | instructions to emit between literal pool\n\ | |
8255c61b MF |
1071 | locations; implies --auto-litpools flag\n\ |
1072 | --[no-]separate-prop-tables\n\ | |
1073 | [Do not] place Xtensa property records into\n\ | |
1074 | individual property sections for each section.\n\ | |
1075 | Default is to generate single property section.\n", stream); | |
e0001a05 NC |
1076 | } |
1077 | ||
7fa3d080 BW |
1078 | \f |
1079 | /* Functions related to the list of current label symbols. */ | |
43cd72b9 BW |
1080 | |
1081 | static void | |
7fa3d080 | 1082 | xtensa_add_insn_label (symbolS *sym) |
43cd72b9 | 1083 | { |
7fa3d080 | 1084 | sym_list *l; |
43cd72b9 | 1085 | |
7fa3d080 | 1086 | if (!free_insn_labels) |
325801bd | 1087 | l = XNEW (sym_list); |
7fa3d080 | 1088 | else |
43cd72b9 | 1089 | { |
7fa3d080 BW |
1090 | l = free_insn_labels; |
1091 | free_insn_labels = l->next; | |
1092 | } | |
1093 | ||
1094 | l->sym = sym; | |
1095 | l->next = insn_labels; | |
1096 | insn_labels = l; | |
1097 | } | |
1098 | ||
1099 | ||
1100 | static void | |
1101 | xtensa_clear_insn_labels (void) | |
1102 | { | |
1103 | sym_list **pl; | |
1104 | ||
1105 | for (pl = &free_insn_labels; *pl != NULL; pl = &(*pl)->next) | |
1106 | ; | |
1107 | *pl = insn_labels; | |
1108 | insn_labels = NULL; | |
1109 | } | |
1110 | ||
1111 | ||
7fa3d080 | 1112 | static void |
c3ea6048 | 1113 | xtensa_move_labels (fragS *new_frag, valueT new_offset) |
7fa3d080 BW |
1114 | { |
1115 | sym_list *lit; | |
1116 | ||
1117 | for (lit = insn_labels; lit; lit = lit->next) | |
1118 | { | |
1119 | symbolS *lit_sym = lit->sym; | |
c3ea6048 BW |
1120 | S_SET_VALUE (lit_sym, new_offset); |
1121 | symbol_set_frag (lit_sym, new_frag); | |
43cd72b9 BW |
1122 | } |
1123 | } | |
1124 | ||
e0001a05 NC |
1125 | \f |
1126 | /* Directive data and functions. */ | |
1127 | ||
1128 | typedef struct state_stackS_struct | |
1129 | { | |
1130 | directiveE directive; | |
1131 | bfd_boolean negated; | |
1132 | bfd_boolean old_state; | |
1133 | const char *file; | |
1134 | unsigned int line; | |
1135 | const void *datum; | |
1136 | struct state_stackS_struct *prev; | |
1137 | } state_stackS; | |
1138 | ||
1139 | state_stackS *directive_state_stack; | |
1140 | ||
1141 | const pseudo_typeS md_pseudo_table[] = | |
1142 | { | |
43cd72b9 BW |
1143 | { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */ |
1144 | { "literal_position", xtensa_literal_position, 0 }, | |
1145 | { "frame", s_ignore, 0 }, /* Formerly used for STABS debugging. */ | |
1146 | { "long", xtensa_elf_cons, 4 }, | |
1147 | { "word", xtensa_elf_cons, 4 }, | |
1bbb5f21 | 1148 | { "4byte", xtensa_elf_cons, 4 }, |
43cd72b9 | 1149 | { "short", xtensa_elf_cons, 2 }, |
1bbb5f21 | 1150 | { "2byte", xtensa_elf_cons, 2 }, |
fb227da0 BW |
1151 | { "sleb128", xtensa_leb128, 1}, |
1152 | { "uleb128", xtensa_leb128, 0}, | |
43cd72b9 BW |
1153 | { "begin", xtensa_begin_directive, 0 }, |
1154 | { "end", xtensa_end_directive, 0 }, | |
43cd72b9 BW |
1155 | { "literal", xtensa_literal_pseudo, 0 }, |
1156 | { "frequency", xtensa_frequency_pseudo, 0 }, | |
1157 | { NULL, 0, 0 }, | |
e0001a05 NC |
1158 | }; |
1159 | ||
1160 | ||
7fa3d080 BW |
1161 | static bfd_boolean |
1162 | use_transform (void) | |
e0001a05 | 1163 | { |
43cd72b9 BW |
1164 | /* After md_end, you should be checking frag by frag, rather |
1165 | than state directives. */ | |
9c2799c2 | 1166 | gas_assert (!past_xtensa_end); |
43cd72b9 | 1167 | return directive_state[directive_transform]; |
e0001a05 NC |
1168 | } |
1169 | ||
1170 | ||
7fa3d080 BW |
1171 | static bfd_boolean |
1172 | do_align_targets (void) | |
e0001a05 | 1173 | { |
7b1cc377 BW |
1174 | /* Do not use this function after md_end; just look at align_targets |
1175 | instead. There is no target-align directive, so alignment is either | |
1176 | enabled for all frags or not done at all. */ | |
9c2799c2 | 1177 | gas_assert (!past_xtensa_end); |
43cd72b9 | 1178 | return align_targets && use_transform (); |
e0001a05 NC |
1179 | } |
1180 | ||
1181 | ||
1182 | static void | |
7fa3d080 | 1183 | directive_push (directiveE directive, bfd_boolean negated, const void *datum) |
e0001a05 | 1184 | { |
3b4dbbbf | 1185 | const char *file; |
e0001a05 | 1186 | unsigned int line; |
325801bd | 1187 | state_stackS *stack = XNEW (state_stackS); |
e0001a05 | 1188 | |
3b4dbbbf | 1189 | file = as_where (&line); |
e0001a05 NC |
1190 | |
1191 | stack->directive = directive; | |
1192 | stack->negated = negated; | |
1193 | stack->old_state = directive_state[directive]; | |
1194 | stack->file = file; | |
1195 | stack->line = line; | |
1196 | stack->datum = datum; | |
1197 | stack->prev = directive_state_stack; | |
1198 | directive_state_stack = stack; | |
1199 | ||
1200 | directive_state[directive] = !negated; | |
1201 | } | |
1202 | ||
7fa3d080 | 1203 | |
e0001a05 | 1204 | static void |
7fa3d080 BW |
1205 | directive_pop (directiveE *directive, |
1206 | bfd_boolean *negated, | |
1207 | const char **file, | |
1208 | unsigned int *line, | |
1209 | const void **datum) | |
e0001a05 NC |
1210 | { |
1211 | state_stackS *top = directive_state_stack; | |
1212 | ||
1213 | if (!directive_state_stack) | |
1214 | { | |
33eaf5de | 1215 | as_bad (_("unmatched .end directive")); |
e0001a05 NC |
1216 | *directive = directive_none; |
1217 | return; | |
1218 | } | |
1219 | ||
1220 | directive_state[directive_state_stack->directive] = top->old_state; | |
1221 | *directive = top->directive; | |
1222 | *negated = top->negated; | |
1223 | *file = top->file; | |
1224 | *line = top->line; | |
1225 | *datum = top->datum; | |
1226 | directive_state_stack = top->prev; | |
1227 | free (top); | |
1228 | } | |
1229 | ||
1230 | ||
1231 | static void | |
7fa3d080 | 1232 | directive_balance (void) |
e0001a05 NC |
1233 | { |
1234 | while (directive_state_stack) | |
1235 | { | |
1236 | directiveE directive; | |
1237 | bfd_boolean negated; | |
1238 | const char *file; | |
1239 | unsigned int line; | |
1240 | const void *datum; | |
1241 | ||
1242 | directive_pop (&directive, &negated, &file, &line, &datum); | |
1243 | as_warn_where ((char *) file, line, | |
1244 | _(".begin directive with no matching .end directive")); | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | ||
1249 | static bfd_boolean | |
7fa3d080 | 1250 | inside_directive (directiveE dir) |
e0001a05 NC |
1251 | { |
1252 | state_stackS *top = directive_state_stack; | |
1253 | ||
1254 | while (top && top->directive != dir) | |
1255 | top = top->prev; | |
1256 | ||
1257 | return (top != NULL); | |
1258 | } | |
1259 | ||
1260 | ||
1261 | static void | |
7fa3d080 | 1262 | get_directive (directiveE *directive, bfd_boolean *negated) |
e0001a05 NC |
1263 | { |
1264 | int len; | |
1265 | unsigned i; | |
b9bb4a93 | 1266 | const char *directive_string; |
e0001a05 NC |
1267 | |
1268 | if (strncmp (input_line_pointer, "no-", 3) != 0) | |
1269 | *negated = FALSE; | |
1270 | else | |
1271 | { | |
1272 | *negated = TRUE; | |
1273 | input_line_pointer += 3; | |
1274 | } | |
1275 | ||
1276 | len = strspn (input_line_pointer, | |
43cd72b9 BW |
1277 | "abcdefghijklmnopqrstuvwxyz_-/0123456789."); |
1278 | ||
1279 | /* This code is a hack to make .begin [no-][generics|relax] exactly | |
1280 | equivalent to .begin [no-]transform. We should remove it when | |
1281 | we stop accepting those options. */ | |
c138bc38 | 1282 | |
43cd72b9 BW |
1283 | if (strncmp (input_line_pointer, "generics", strlen ("generics")) == 0) |
1284 | { | |
1285 | as_warn (_("[no-]generics is deprecated; use [no-]transform instead")); | |
1286 | directive_string = "transform"; | |
1287 | } | |
1288 | else if (strncmp (input_line_pointer, "relax", strlen ("relax")) == 0) | |
1289 | { | |
1290 | as_warn (_("[no-]relax is deprecated; use [no-]transform instead")); | |
1291 | directive_string = "transform"; | |
c138bc38 | 1292 | } |
43cd72b9 BW |
1293 | else |
1294 | directive_string = input_line_pointer; | |
e0001a05 NC |
1295 | |
1296 | for (i = 0; i < sizeof (directive_info) / sizeof (*directive_info); ++i) | |
1297 | { | |
43cd72b9 | 1298 | if (strncmp (directive_string, directive_info[i].name, len) == 0) |
e0001a05 NC |
1299 | { |
1300 | input_line_pointer += len; | |
1301 | *directive = (directiveE) i; | |
1302 | if (*negated && !directive_info[i].can_be_negated) | |
43cd72b9 | 1303 | as_bad (_("directive %s cannot be negated"), |
e0001a05 NC |
1304 | directive_info[i].name); |
1305 | return; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | as_bad (_("unknown directive")); | |
1310 | *directive = (directiveE) XTENSA_UNDEFINED; | |
1311 | } | |
1312 | ||
1313 | ||
1314 | static void | |
7fa3d080 | 1315 | xtensa_begin_directive (int ignore ATTRIBUTE_UNUSED) |
e0001a05 NC |
1316 | { |
1317 | directiveE directive; | |
1318 | bfd_boolean negated; | |
1319 | emit_state *state; | |
e0001a05 NC |
1320 | lit_state *ls; |
1321 | ||
1322 | get_directive (&directive, &negated); | |
1323 | if (directive == (directiveE) XTENSA_UNDEFINED) | |
1324 | { | |
1325 | discard_rest_of_line (); | |
1326 | return; | |
1327 | } | |
1328 | ||
43cd72b9 BW |
1329 | if (cur_vinsn.inside_bundle) |
1330 | as_bad (_("directives are not valid inside bundles")); | |
1331 | ||
e0001a05 NC |
1332 | switch (directive) |
1333 | { | |
1334 | case directive_literal: | |
82e7541d BW |
1335 | if (!inside_directive (directive_literal)) |
1336 | { | |
1337 | /* Previous labels go with whatever follows this directive, not with | |
1338 | the literal, so save them now. */ | |
1339 | saved_insn_labels = insn_labels; | |
1340 | insn_labels = NULL; | |
1341 | } | |
43cd72b9 | 1342 | as_warn (_(".begin literal is deprecated; use .literal instead")); |
325801bd | 1343 | state = XNEW (emit_state); |
e0001a05 NC |
1344 | xtensa_switch_to_literal_fragment (state); |
1345 | directive_push (directive_literal, negated, state); | |
1346 | break; | |
1347 | ||
1348 | case directive_literal_prefix: | |
c138bc38 | 1349 | /* Have to flush pending output because a movi relaxed to an l32r |
43cd72b9 BW |
1350 | might produce a literal. */ |
1351 | md_flush_pending_output (); | |
e0001a05 NC |
1352 | /* Check to see if the current fragment is a literal |
1353 | fragment. If it is, then this operation is not allowed. */ | |
43cd72b9 | 1354 | if (generating_literals) |
e0001a05 NC |
1355 | { |
1356 | as_bad (_("cannot set literal_prefix inside literal fragment")); | |
1357 | return; | |
1358 | } | |
1359 | ||
1360 | /* Allocate the literal state for this section and push | |
1361 | onto the directive stack. */ | |
325801bd | 1362 | ls = XNEW (lit_state); |
9c2799c2 | 1363 | gas_assert (ls); |
e0001a05 NC |
1364 | |
1365 | *ls = default_lit_sections; | |
e0001a05 NC |
1366 | directive_push (directive_literal_prefix, negated, ls); |
1367 | ||
e0001a05 | 1368 | /* Process the new prefix. */ |
74869ac7 | 1369 | xtensa_literal_prefix (); |
e0001a05 NC |
1370 | break; |
1371 | ||
1372 | case directive_freeregs: | |
1373 | /* This information is currently unused, but we'll accept the statement | |
1374 | and just discard the rest of the line. This won't check the syntax, | |
1375 | but it will accept every correct freeregs directive. */ | |
1376 | input_line_pointer += strcspn (input_line_pointer, "\n"); | |
1377 | directive_push (directive_freeregs, negated, 0); | |
1378 | break; | |
1379 | ||
43cd72b9 BW |
1380 | case directive_schedule: |
1381 | md_flush_pending_output (); | |
1382 | frag_var (rs_fill, 0, 0, frag_now->fr_subtype, | |
1383 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
1384 | directive_push (directive_schedule, negated, 0); | |
1385 | xtensa_set_frag_assembly_state (frag_now); | |
1386 | break; | |
1387 | ||
e0001a05 | 1388 | case directive_density: |
43cd72b9 BW |
1389 | as_warn (_(".begin [no-]density is ignored")); |
1390 | break; | |
1391 | ||
1392 | case directive_absolute_literals: | |
1393 | md_flush_pending_output (); | |
1394 | if (!absolute_literals_supported && !negated) | |
e0001a05 | 1395 | { |
43cd72b9 | 1396 | as_warn (_("Xtensa absolute literals option not supported; ignored")); |
e0001a05 NC |
1397 | break; |
1398 | } | |
43cd72b9 BW |
1399 | xtensa_set_frag_assembly_state (frag_now); |
1400 | directive_push (directive, negated, 0); | |
1401 | break; | |
e0001a05 NC |
1402 | |
1403 | default: | |
43cd72b9 BW |
1404 | md_flush_pending_output (); |
1405 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
1406 | directive_push (directive, negated, 0); |
1407 | break; | |
1408 | } | |
1409 | ||
1410 | demand_empty_rest_of_line (); | |
1411 | } | |
1412 | ||
1413 | ||
1414 | static void | |
7fa3d080 | 1415 | xtensa_end_directive (int ignore ATTRIBUTE_UNUSED) |
e0001a05 NC |
1416 | { |
1417 | directiveE begin_directive, end_directive; | |
1418 | bfd_boolean begin_negated, end_negated; | |
1419 | const char *file; | |
1420 | unsigned int line; | |
1421 | emit_state *state; | |
43cd72b9 | 1422 | emit_state **state_ptr; |
e0001a05 NC |
1423 | lit_state *s; |
1424 | ||
43cd72b9 BW |
1425 | if (cur_vinsn.inside_bundle) |
1426 | as_bad (_("directives are not valid inside bundles")); | |
82e7541d | 1427 | |
e0001a05 | 1428 | get_directive (&end_directive, &end_negated); |
43cd72b9 BW |
1429 | |
1430 | md_flush_pending_output (); | |
1431 | ||
87975d2a | 1432 | switch ((int) end_directive) |
e0001a05 | 1433 | { |
87975d2a | 1434 | case XTENSA_UNDEFINED: |
e0001a05 NC |
1435 | discard_rest_of_line (); |
1436 | return; | |
e0001a05 | 1437 | |
87975d2a | 1438 | case (int) directive_density: |
43cd72b9 | 1439 | as_warn (_(".end [no-]density is ignored")); |
e0001a05 | 1440 | demand_empty_rest_of_line (); |
43cd72b9 BW |
1441 | break; |
1442 | ||
87975d2a | 1443 | case (int) directive_absolute_literals: |
43cd72b9 BW |
1444 | if (!absolute_literals_supported && !end_negated) |
1445 | { | |
1446 | as_warn (_("Xtensa absolute literals option not supported; ignored")); | |
1447 | demand_empty_rest_of_line (); | |
1448 | return; | |
1449 | } | |
1450 | break; | |
1451 | ||
1452 | default: | |
1453 | break; | |
e0001a05 NC |
1454 | } |
1455 | ||
43cd72b9 | 1456 | state_ptr = &state; /* use state_ptr to avoid type-punning warning */ |
e0001a05 | 1457 | directive_pop (&begin_directive, &begin_negated, &file, &line, |
43cd72b9 | 1458 | (const void **) state_ptr); |
e0001a05 NC |
1459 | |
1460 | if (begin_directive != directive_none) | |
1461 | { | |
1462 | if (begin_directive != end_directive || begin_negated != end_negated) | |
1463 | { | |
1464 | as_bad (_("does not match begin %s%s at %s:%d"), | |
1465 | begin_negated ? "no-" : "", | |
1466 | directive_info[begin_directive].name, file, line); | |
1467 | } | |
1468 | else | |
1469 | { | |
1470 | switch (end_directive) | |
1471 | { | |
1472 | case directive_literal: | |
1473 | frag_var (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
1474 | xtensa_restore_emit_state (state); | |
43cd72b9 | 1475 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 1476 | free (state); |
82e7541d BW |
1477 | if (!inside_directive (directive_literal)) |
1478 | { | |
1479 | /* Restore the list of current labels. */ | |
1480 | xtensa_clear_insn_labels (); | |
1481 | insn_labels = saved_insn_labels; | |
1482 | } | |
e0001a05 NC |
1483 | break; |
1484 | ||
e0001a05 NC |
1485 | case directive_literal_prefix: |
1486 | /* Restore the default collection sections from saved state. */ | |
1487 | s = (lit_state *) state; | |
9c2799c2 | 1488 | gas_assert (s); |
e8247da7 | 1489 | default_lit_sections = *s; |
e0001a05 | 1490 | |
74869ac7 BW |
1491 | /* Free the state storage. */ |
1492 | free (s->lit_prefix); | |
e0001a05 NC |
1493 | free (s); |
1494 | break; | |
1495 | ||
43cd72b9 BW |
1496 | case directive_schedule: |
1497 | case directive_freeregs: | |
1498 | break; | |
1499 | ||
e0001a05 | 1500 | default: |
43cd72b9 | 1501 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
1502 | break; |
1503 | } | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | demand_empty_rest_of_line (); | |
1508 | } | |
1509 | ||
1510 | ||
1511 | /* Place an aligned literal fragment at the current location. */ | |
1512 | ||
1513 | static void | |
7fa3d080 | 1514 | xtensa_literal_position (int ignore ATTRIBUTE_UNUSED) |
e0001a05 | 1515 | { |
43cd72b9 BW |
1516 | md_flush_pending_output (); |
1517 | ||
e0001a05 NC |
1518 | if (inside_directive (directive_literal)) |
1519 | as_warn (_(".literal_position inside literal directive; ignoring")); | |
43cd72b9 | 1520 | xtensa_mark_literal_pool_location (); |
e0001a05 NC |
1521 | |
1522 | demand_empty_rest_of_line (); | |
82e7541d | 1523 | xtensa_clear_insn_labels (); |
e0001a05 NC |
1524 | } |
1525 | ||
1526 | ||
43cd72b9 | 1527 | /* Support .literal label, expr, ... */ |
e0001a05 NC |
1528 | |
1529 | static void | |
7fa3d080 | 1530 | xtensa_literal_pseudo (int ignored ATTRIBUTE_UNUSED) |
e0001a05 NC |
1531 | { |
1532 | emit_state state; | |
1745fcba | 1533 | char *p, *base_name; |
e0001a05 | 1534 | char c; |
e0001a05 | 1535 | |
82e7541d BW |
1536 | if (inside_directive (directive_literal)) |
1537 | { | |
1538 | as_bad (_(".literal not allowed inside .begin literal region")); | |
1539 | ignore_rest_of_line (); | |
1540 | return; | |
1541 | } | |
1542 | ||
43cd72b9 BW |
1543 | md_flush_pending_output (); |
1544 | ||
82e7541d BW |
1545 | /* Previous labels go with whatever follows this directive, not with |
1546 | the literal, so save them now. */ | |
1547 | saved_insn_labels = insn_labels; | |
1548 | insn_labels = NULL; | |
1549 | ||
e0001a05 NC |
1550 | base_name = input_line_pointer; |
1551 | ||
1552 | xtensa_switch_to_literal_fragment (&state); | |
1553 | ||
43cd72b9 BW |
1554 | /* All literals are aligned to four-byte boundaries. */ |
1555 | frag_align (2, 0, 0); | |
1556 | record_alignment (now_seg, 2); | |
e0001a05 | 1557 | |
d02603dc | 1558 | c = get_symbol_name (&base_name); |
e0001a05 NC |
1559 | /* Just after name is now '\0'. */ |
1560 | p = input_line_pointer; | |
1561 | *p = c; | |
d02603dc | 1562 | SKIP_WHITESPACE_AFTER_NAME (); |
e0001a05 NC |
1563 | |
1564 | if (*input_line_pointer != ',' && *input_line_pointer != ':') | |
1565 | { | |
1566 | as_bad (_("expected comma or colon after symbol name; " | |
1567 | "rest of line ignored")); | |
1568 | ignore_rest_of_line (); | |
1569 | xtensa_restore_emit_state (&state); | |
1570 | return; | |
1571 | } | |
e0001a05 | 1572 | |
d02603dc | 1573 | *p = 0; |
e0001a05 | 1574 | colon (base_name); |
e0001a05 | 1575 | *p = c; |
d02603dc | 1576 | |
43cd72b9 | 1577 | input_line_pointer++; /* skip ',' or ':' */ |
e0001a05 | 1578 | |
43cd72b9 | 1579 | xtensa_elf_cons (4); |
e0001a05 NC |
1580 | |
1581 | xtensa_restore_emit_state (&state); | |
82e7541d BW |
1582 | |
1583 | /* Restore the list of current labels. */ | |
1584 | xtensa_clear_insn_labels (); | |
1585 | insn_labels = saved_insn_labels; | |
e0001a05 NC |
1586 | } |
1587 | ||
1588 | ||
1589 | static void | |
74869ac7 | 1590 | xtensa_literal_prefix (void) |
e0001a05 | 1591 | { |
74869ac7 BW |
1592 | char *name; |
1593 | int len; | |
1594 | ||
1595 | /* Parse the new prefix from the input_line_pointer. */ | |
1596 | SKIP_WHITESPACE (); | |
1597 | len = strspn (input_line_pointer, | |
1598 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
1599 | "abcdefghijklmnopqrstuvwxyz_/0123456789.$"); | |
e0001a05 NC |
1600 | |
1601 | /* Get a null-terminated copy of the name. */ | |
29a2809e | 1602 | name = xmemdup0 (input_line_pointer, len); |
e0001a05 | 1603 | |
74869ac7 BW |
1604 | /* Skip the name in the input line. */ |
1605 | input_line_pointer += len; | |
43cd72b9 | 1606 | |
74869ac7 | 1607 | default_lit_sections.lit_prefix = name; |
43cd72b9 | 1608 | |
74869ac7 | 1609 | /* Clear cached literal sections, since the prefix has changed. */ |
43cd72b9 BW |
1610 | default_lit_sections.lit_seg = NULL; |
1611 | default_lit_sections.lit4_seg = NULL; | |
43cd72b9 BW |
1612 | } |
1613 | ||
1614 | ||
1615 | /* Support ".frequency branch_target_frequency fall_through_frequency". */ | |
1616 | ||
1617 | static void | |
7fa3d080 | 1618 | xtensa_frequency_pseudo (int ignored ATTRIBUTE_UNUSED) |
43cd72b9 BW |
1619 | { |
1620 | float fall_through_f, target_f; | |
43cd72b9 BW |
1621 | |
1622 | fall_through_f = (float) strtod (input_line_pointer, &input_line_pointer); | |
1623 | if (fall_through_f < 0) | |
1624 | { | |
1625 | as_bad (_("fall through frequency must be greater than 0")); | |
1626 | ignore_rest_of_line (); | |
1627 | return; | |
1628 | } | |
1629 | ||
1630 | target_f = (float) strtod (input_line_pointer, &input_line_pointer); | |
1631 | if (target_f < 0) | |
1632 | { | |
1633 | as_bad (_("branch target frequency must be greater than 0")); | |
1634 | ignore_rest_of_line (); | |
1635 | return; | |
1636 | } | |
1637 | ||
b08b5071 | 1638 | set_subseg_freq (now_seg, now_subseg, target_f + fall_through_f, target_f); |
43cd72b9 BW |
1639 | |
1640 | demand_empty_rest_of_line (); | |
1641 | } | |
1642 | ||
1643 | ||
1644 | /* Like normal .long/.short/.word, except support @plt, etc. | |
1645 | Clobbers input_line_pointer, checks end-of-line. */ | |
1646 | ||
1647 | static void | |
7fa3d080 | 1648 | xtensa_elf_cons (int nbytes) |
43cd72b9 BW |
1649 | { |
1650 | expressionS exp; | |
1651 | bfd_reloc_code_real_type reloc; | |
1652 | ||
1653 | md_flush_pending_output (); | |
1654 | ||
1655 | if (cur_vinsn.inside_bundle) | |
1656 | as_bad (_("directives are not valid inside bundles")); | |
1657 | ||
1658 | if (is_it_end_of_statement ()) | |
1659 | { | |
1660 | demand_empty_rest_of_line (); | |
1661 | return; | |
1662 | } | |
1663 | ||
1664 | do | |
1665 | { | |
1666 | expression (&exp); | |
1667 | if (exp.X_op == O_symbol | |
1668 | && *input_line_pointer == '@' | |
1669 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, &exp)) | |
1670 | != BFD_RELOC_NONE)) | |
1671 | { | |
1672 | reloc_howto_type *reloc_howto = | |
1673 | bfd_reloc_type_lookup (stdoutput, reloc); | |
1674 | ||
1675 | if (reloc == BFD_RELOC_UNUSED || !reloc_howto) | |
1676 | as_bad (_("unsupported relocation")); | |
1677 | else if ((reloc >= BFD_RELOC_XTENSA_SLOT0_OP | |
1678 | && reloc <= BFD_RELOC_XTENSA_SLOT14_OP) | |
1679 | || (reloc >= BFD_RELOC_XTENSA_SLOT0_ALT | |
1680 | && reloc <= BFD_RELOC_XTENSA_SLOT14_ALT)) | |
1681 | as_bad (_("opcode-specific %s relocation used outside " | |
1682 | "an instruction"), reloc_howto->name); | |
1683 | else if (nbytes != (int) bfd_get_reloc_size (reloc_howto)) | |
992a06ee AM |
1684 | as_bad (ngettext ("%s relocations do not fit in %d byte", |
1685 | "%s relocations do not fit in %d bytes", | |
1686 | nbytes), | |
43cd72b9 | 1687 | reloc_howto->name, nbytes); |
28dbbc02 BW |
1688 | else if (reloc == BFD_RELOC_XTENSA_TLS_FUNC |
1689 | || reloc == BFD_RELOC_XTENSA_TLS_ARG | |
1690 | || reloc == BFD_RELOC_XTENSA_TLS_CALL) | |
1691 | as_bad (_("invalid use of %s relocation"), reloc_howto->name); | |
43cd72b9 BW |
1692 | else |
1693 | { | |
1694 | char *p = frag_more ((int) nbytes); | |
1695 | xtensa_set_frag_assembly_state (frag_now); | |
1696 | fix_new_exp (frag_now, p - frag_now->fr_literal, | |
1bbb5f21 | 1697 | nbytes, &exp, reloc_howto->pc_relative, reloc); |
43cd72b9 BW |
1698 | } |
1699 | } | |
1700 | else | |
1f7efbae BW |
1701 | { |
1702 | xtensa_set_frag_assembly_state (frag_now); | |
1703 | emit_expr (&exp, (unsigned int) nbytes); | |
1704 | } | |
43cd72b9 BW |
1705 | } |
1706 | while (*input_line_pointer++ == ','); | |
1707 | ||
1708 | input_line_pointer--; /* Put terminator back into stream. */ | |
1709 | demand_empty_rest_of_line (); | |
1710 | } | |
1711 | ||
fb227da0 BW |
1712 | static bfd_boolean is_leb128_expr; |
1713 | ||
1714 | static void | |
1715 | xtensa_leb128 (int sign) | |
1716 | { | |
1717 | is_leb128_expr = TRUE; | |
1718 | s_leb128 (sign); | |
1719 | is_leb128_expr = FALSE; | |
1720 | } | |
1721 | ||
7fa3d080 BW |
1722 | \f |
1723 | /* Parsing and Idiom Translation. */ | |
43cd72b9 BW |
1724 | |
1725 | /* Parse @plt, etc. and return the desired relocation. */ | |
1726 | static bfd_reloc_code_real_type | |
7fa3d080 | 1727 | xtensa_elf_suffix (char **str_p, expressionS *exp_p) |
43cd72b9 | 1728 | { |
43cd72b9 BW |
1729 | char ident[20]; |
1730 | char *str = *str_p; | |
1731 | char *str2; | |
1732 | int ch; | |
1733 | int len; | |
e066bf5f | 1734 | unsigned int i; |
43cd72b9 BW |
1735 | |
1736 | if (*str++ != '@') | |
1737 | return BFD_RELOC_NONE; | |
1738 | ||
1739 | for (ch = *str, str2 = ident; | |
1740 | (str2 < ident + sizeof (ident) - 1 | |
1741 | && (ISALNUM (ch) || ch == '@')); | |
1742 | ch = *++str) | |
1743 | { | |
1744 | *str2++ = (ISLOWER (ch)) ? ch : TOLOWER (ch); | |
1745 | } | |
1746 | ||
1747 | *str2 = '\0'; | |
1748 | len = str2 - ident; | |
1749 | ||
1750 | ch = ident[0]; | |
e066bf5f TS |
1751 | for (i = 0; i < ARRAY_SIZE (suffix_relocs); i++) |
1752 | if (ch == suffix_relocs[i].suffix[0] | |
1753 | && len == suffix_relocs[i].length | |
1754 | && memcmp (ident, suffix_relocs[i].suffix, suffix_relocs[i].length) == 0) | |
43cd72b9 BW |
1755 | { |
1756 | /* Now check for "identifier@suffix+constant". */ | |
1757 | if (*str == '-' || *str == '+') | |
1758 | { | |
1759 | char *orig_line = input_line_pointer; | |
1760 | expressionS new_exp; | |
1761 | ||
1762 | input_line_pointer = str; | |
1763 | expression (&new_exp); | |
1764 | if (new_exp.X_op == O_constant) | |
1765 | { | |
1766 | exp_p->X_add_number += new_exp.X_add_number; | |
1767 | str = input_line_pointer; | |
1768 | } | |
1769 | ||
1770 | if (&input_line_pointer != str_p) | |
1771 | input_line_pointer = orig_line; | |
1772 | } | |
1773 | ||
1774 | *str_p = str; | |
e066bf5f | 1775 | return suffix_relocs[i].reloc; |
43cd72b9 BW |
1776 | } |
1777 | ||
1778 | return BFD_RELOC_UNUSED; | |
e0001a05 NC |
1779 | } |
1780 | ||
e0001a05 | 1781 | |
bbdd25a8 | 1782 | /* Find the matching operator type. */ |
cc34adb2 | 1783 | static operatorT |
bbdd25a8 BW |
1784 | map_suffix_reloc_to_operator (bfd_reloc_code_real_type reloc) |
1785 | { | |
cc34adb2 | 1786 | operatorT operator = O_illegal; |
e066bf5f | 1787 | unsigned int i; |
3739860c | 1788 | |
e066bf5f | 1789 | for (i = 0; i < ARRAY_SIZE (suffix_relocs); i++) |
bbdd25a8 | 1790 | { |
e066bf5f | 1791 | if (suffix_relocs[i].reloc == reloc) |
bbdd25a8 | 1792 | { |
e066bf5f | 1793 | operator = suffix_relocs[i].operator; |
bbdd25a8 BW |
1794 | break; |
1795 | } | |
1796 | } | |
cc34adb2 | 1797 | gas_assert (operator != O_illegal); |
bbdd25a8 BW |
1798 | return operator; |
1799 | } | |
1800 | ||
1801 | ||
1802 | /* Find the matching reloc type. */ | |
1803 | static bfd_reloc_code_real_type | |
28dbbc02 | 1804 | map_operator_to_reloc (unsigned char operator, bfd_boolean is_literal) |
bbdd25a8 | 1805 | { |
e066bf5f | 1806 | unsigned int i; |
bbdd25a8 BW |
1807 | bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED; |
1808 | ||
e066bf5f | 1809 | for (i = 0; i < ARRAY_SIZE (suffix_relocs); i++) |
bbdd25a8 | 1810 | { |
e066bf5f | 1811 | if (suffix_relocs[i].operator == operator) |
bbdd25a8 | 1812 | { |
e066bf5f | 1813 | reloc = suffix_relocs[i].reloc; |
bbdd25a8 BW |
1814 | break; |
1815 | } | |
1816 | } | |
1817 | ||
28dbbc02 BW |
1818 | if (is_literal) |
1819 | { | |
1820 | if (reloc == BFD_RELOC_XTENSA_TLS_FUNC) | |
1821 | return BFD_RELOC_XTENSA_TLSDESC_FN; | |
1822 | else if (reloc == BFD_RELOC_XTENSA_TLS_ARG) | |
1823 | return BFD_RELOC_XTENSA_TLSDESC_ARG; | |
1824 | } | |
1825 | ||
bbdd25a8 BW |
1826 | if (reloc == BFD_RELOC_UNUSED) |
1827 | return BFD_RELOC_32; | |
1828 | ||
1829 | return reloc; | |
1830 | } | |
1831 | ||
1832 | ||
e0001a05 | 1833 | static const char * |
7fa3d080 | 1834 | expression_end (const char *name) |
e0001a05 NC |
1835 | { |
1836 | while (1) | |
1837 | { | |
1838 | switch (*name) | |
1839 | { | |
43cd72b9 | 1840 | case '}': |
e0001a05 NC |
1841 | case ';': |
1842 | case '\0': | |
1843 | case ',': | |
43cd72b9 | 1844 | case ':': |
e0001a05 NC |
1845 | return name; |
1846 | case ' ': | |
1847 | case '\t': | |
1848 | ++name; | |
1849 | continue; | |
1850 | default: | |
1851 | return 0; | |
1852 | } | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | ||
1857 | #define ERROR_REG_NUM ((unsigned) -1) | |
1858 | ||
1859 | static unsigned | |
7fa3d080 | 1860 | tc_get_register (const char *prefix) |
e0001a05 NC |
1861 | { |
1862 | unsigned reg; | |
1863 | const char *next_expr; | |
1864 | const char *old_line_pointer; | |
1865 | ||
1866 | SKIP_WHITESPACE (); | |
1867 | old_line_pointer = input_line_pointer; | |
1868 | ||
1869 | if (*input_line_pointer == '$') | |
1870 | ++input_line_pointer; | |
1871 | ||
1872 | /* Accept "sp" as a synonym for "a1". */ | |
1873 | if (input_line_pointer[0] == 's' && input_line_pointer[1] == 'p' | |
1874 | && expression_end (input_line_pointer + 2)) | |
1875 | { | |
1876 | input_line_pointer += 2; | |
1877 | return 1; /* AR[1] */ | |
1878 | } | |
1879 | ||
1880 | while (*input_line_pointer++ == *prefix++) | |
1881 | ; | |
1882 | --input_line_pointer; | |
1883 | --prefix; | |
1884 | ||
1885 | if (*prefix) | |
1886 | { | |
1887 | as_bad (_("bad register name: %s"), old_line_pointer); | |
1888 | return ERROR_REG_NUM; | |
1889 | } | |
1890 | ||
1891 | if (!ISDIGIT ((unsigned char) *input_line_pointer)) | |
1892 | { | |
1893 | as_bad (_("bad register number: %s"), input_line_pointer); | |
1894 | return ERROR_REG_NUM; | |
1895 | } | |
1896 | ||
1897 | reg = 0; | |
1898 | ||
1899 | while (ISDIGIT ((int) *input_line_pointer)) | |
1900 | reg = reg * 10 + *input_line_pointer++ - '0'; | |
1901 | ||
1902 | if (!(next_expr = expression_end (input_line_pointer))) | |
1903 | { | |
1904 | as_bad (_("bad register name: %s"), old_line_pointer); | |
1905 | return ERROR_REG_NUM; | |
1906 | } | |
1907 | ||
1908 | input_line_pointer = (char *) next_expr; | |
1909 | ||
1910 | return reg; | |
1911 | } | |
1912 | ||
1913 | ||
e0001a05 | 1914 | static void |
7fa3d080 | 1915 | expression_maybe_register (xtensa_opcode opc, int opnd, expressionS *tok) |
e0001a05 | 1916 | { |
43cd72b9 | 1917 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 | 1918 | |
43cd72b9 BW |
1919 | /* Check if this is an immediate operand. */ |
1920 | if (xtensa_operand_is_register (isa, opc, opnd) == 0) | |
e0001a05 | 1921 | { |
43cd72b9 | 1922 | bfd_reloc_code_real_type reloc; |
e0001a05 | 1923 | segT t = expression (tok); |
91d6fa6a | 1924 | |
43cd72b9 BW |
1925 | if (t == absolute_section |
1926 | && xtensa_operand_is_PCrelative (isa, opc, opnd) == 1) | |
e0001a05 | 1927 | { |
9c2799c2 | 1928 | gas_assert (tok->X_op == O_constant); |
e0001a05 NC |
1929 | tok->X_op = O_symbol; |
1930 | tok->X_add_symbol = &abs_symbol; | |
1931 | } | |
43cd72b9 BW |
1932 | |
1933 | if ((tok->X_op == O_constant || tok->X_op == O_symbol) | |
bbdd25a8 BW |
1934 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, tok)) |
1935 | != BFD_RELOC_NONE)) | |
e0001a05 | 1936 | { |
1bbb5f21 | 1937 | switch (reloc) |
43cd72b9 | 1938 | { |
1bbb5f21 BW |
1939 | case BFD_RELOC_LO16: |
1940 | if (tok->X_op == O_constant) | |
bbdd25a8 | 1941 | { |
43cd72b9 | 1942 | tok->X_add_number &= 0xffff; |
bbdd25a8 | 1943 | return; |
1bbb5f21 BW |
1944 | } |
1945 | break; | |
1946 | case BFD_RELOC_HI16: | |
1947 | if (tok->X_op == O_constant) | |
1948 | { | |
43cd72b9 | 1949 | tok->X_add_number = ((unsigned) tok->X_add_number) >> 16; |
bbdd25a8 | 1950 | return; |
bbdd25a8 | 1951 | } |
1bbb5f21 BW |
1952 | break; |
1953 | case BFD_RELOC_UNUSED: | |
1954 | as_bad (_("unsupported relocation")); | |
1955 | return; | |
1956 | case BFD_RELOC_32_PCREL: | |
1957 | as_bad (_("pcrel relocation not allowed in an instruction")); | |
1958 | return; | |
1959 | default: | |
1960 | break; | |
43cd72b9 | 1961 | } |
bbdd25a8 | 1962 | tok->X_op = map_suffix_reloc_to_operator (reloc); |
e0001a05 | 1963 | } |
e0001a05 NC |
1964 | } |
1965 | else | |
1966 | { | |
43cd72b9 BW |
1967 | xtensa_regfile opnd_rf = xtensa_operand_regfile (isa, opc, opnd); |
1968 | unsigned reg = tc_get_register (xtensa_regfile_shortname (isa, opnd_rf)); | |
e0001a05 NC |
1969 | |
1970 | if (reg != ERROR_REG_NUM) /* Already errored */ | |
1971 | { | |
1972 | uint32 buf = reg; | |
43cd72b9 | 1973 | if (xtensa_operand_encode (isa, opc, opnd, &buf)) |
e0001a05 NC |
1974 | as_bad (_("register number out of range")); |
1975 | } | |
1976 | ||
1977 | tok->X_op = O_register; | |
1978 | tok->X_add_symbol = 0; | |
1979 | tok->X_add_number = reg; | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | ||
1984 | /* Split up the arguments for an opcode or pseudo-op. */ | |
1985 | ||
1986 | static int | |
7fa3d080 | 1987 | tokenize_arguments (char **args, char *str) |
e0001a05 NC |
1988 | { |
1989 | char *old_input_line_pointer; | |
1990 | bfd_boolean saw_comma = FALSE; | |
1991 | bfd_boolean saw_arg = FALSE; | |
43cd72b9 | 1992 | bfd_boolean saw_colon = FALSE; |
e0001a05 NC |
1993 | int num_args = 0; |
1994 | char *arg_end, *arg; | |
1995 | int arg_len; | |
43cd72b9 BW |
1996 | |
1997 | /* Save and restore input_line_pointer around this function. */ | |
e0001a05 NC |
1998 | old_input_line_pointer = input_line_pointer; |
1999 | input_line_pointer = str; | |
2000 | ||
2001 | while (*input_line_pointer) | |
2002 | { | |
2003 | SKIP_WHITESPACE (); | |
2004 | switch (*input_line_pointer) | |
2005 | { | |
2006 | case '\0': | |
43cd72b9 | 2007 | case '}': |
e0001a05 NC |
2008 | goto fini; |
2009 | ||
43cd72b9 BW |
2010 | case ':': |
2011 | input_line_pointer++; | |
2012 | if (saw_comma || saw_colon || !saw_arg) | |
2013 | goto err; | |
2014 | saw_colon = TRUE; | |
2015 | break; | |
2016 | ||
e0001a05 NC |
2017 | case ',': |
2018 | input_line_pointer++; | |
43cd72b9 | 2019 | if (saw_comma || saw_colon || !saw_arg) |
e0001a05 NC |
2020 | goto err; |
2021 | saw_comma = TRUE; | |
2022 | break; | |
2023 | ||
2024 | default: | |
43cd72b9 | 2025 | if (!saw_comma && !saw_colon && saw_arg) |
e0001a05 NC |
2026 | goto err; |
2027 | ||
2028 | arg_end = input_line_pointer + 1; | |
2029 | while (!expression_end (arg_end)) | |
2030 | arg_end += 1; | |
43cd72b9 | 2031 | |
e0001a05 | 2032 | arg_len = arg_end - input_line_pointer; |
325801bd | 2033 | arg = XNEWVEC (char, (saw_colon ? 1 : 0) + arg_len + 1); |
e0001a05 NC |
2034 | args[num_args] = arg; |
2035 | ||
43cd72b9 BW |
2036 | if (saw_colon) |
2037 | *arg++ = ':'; | |
e0001a05 NC |
2038 | strncpy (arg, input_line_pointer, arg_len); |
2039 | arg[arg_len] = '\0'; | |
43cd72b9 | 2040 | |
e0001a05 NC |
2041 | input_line_pointer = arg_end; |
2042 | num_args += 1; | |
c138bc38 | 2043 | saw_comma = FALSE; |
43cd72b9 | 2044 | saw_colon = FALSE; |
c138bc38 | 2045 | saw_arg = TRUE; |
e0001a05 NC |
2046 | break; |
2047 | } | |
2048 | } | |
2049 | ||
2050 | fini: | |
43cd72b9 | 2051 | if (saw_comma || saw_colon) |
e0001a05 NC |
2052 | goto err; |
2053 | input_line_pointer = old_input_line_pointer; | |
2054 | return num_args; | |
2055 | ||
2056 | err: | |
43cd72b9 BW |
2057 | if (saw_comma) |
2058 | as_bad (_("extra comma")); | |
2059 | else if (saw_colon) | |
2060 | as_bad (_("extra colon")); | |
2061 | else if (!saw_arg) | |
c138bc38 | 2062 | as_bad (_("missing argument")); |
43cd72b9 BW |
2063 | else |
2064 | as_bad (_("missing comma or colon")); | |
e0001a05 NC |
2065 | input_line_pointer = old_input_line_pointer; |
2066 | return -1; | |
2067 | } | |
2068 | ||
2069 | ||
43cd72b9 | 2070 | /* Parse the arguments to an opcode. Return TRUE on error. */ |
e0001a05 NC |
2071 | |
2072 | static bfd_boolean | |
7fa3d080 | 2073 | parse_arguments (TInsn *insn, int num_args, char **arg_strings) |
e0001a05 | 2074 | { |
43cd72b9 | 2075 | expressionS *tok, *last_tok; |
e0001a05 NC |
2076 | xtensa_opcode opcode = insn->opcode; |
2077 | bfd_boolean had_error = TRUE; | |
43cd72b9 BW |
2078 | xtensa_isa isa = xtensa_default_isa; |
2079 | int n, num_regs = 0; | |
e0001a05 | 2080 | int opcode_operand_count; |
43cd72b9 BW |
2081 | int opnd_cnt, last_opnd_cnt; |
2082 | unsigned int next_reg = 0; | |
e0001a05 NC |
2083 | char *old_input_line_pointer; |
2084 | ||
2085 | if (insn->insn_type == ITYPE_LITERAL) | |
2086 | opcode_operand_count = 1; | |
2087 | else | |
43cd72b9 | 2088 | opcode_operand_count = xtensa_opcode_num_operands (isa, opcode); |
e0001a05 | 2089 | |
43cd72b9 | 2090 | tok = insn->tok; |
e0001a05 NC |
2091 | memset (tok, 0, sizeof (*tok) * MAX_INSN_ARGS); |
2092 | ||
2093 | /* Save and restore input_line_pointer around this function. */ | |
43cd72b9 BW |
2094 | old_input_line_pointer = input_line_pointer; |
2095 | ||
2096 | last_tok = 0; | |
2097 | last_opnd_cnt = -1; | |
2098 | opnd_cnt = 0; | |
2099 | ||
2100 | /* Skip invisible operands. */ | |
2101 | while (xtensa_operand_is_visible (isa, opcode, opnd_cnt) == 0) | |
2102 | { | |
2103 | opnd_cnt += 1; | |
2104 | tok++; | |
2105 | } | |
e0001a05 NC |
2106 | |
2107 | for (n = 0; n < num_args; n++) | |
43cd72b9 | 2108 | { |
e0001a05 | 2109 | input_line_pointer = arg_strings[n]; |
43cd72b9 BW |
2110 | if (*input_line_pointer == ':') |
2111 | { | |
2112 | xtensa_regfile opnd_rf; | |
2113 | input_line_pointer++; | |
2114 | if (num_regs == 0) | |
2115 | goto err; | |
9c2799c2 | 2116 | gas_assert (opnd_cnt > 0); |
43cd72b9 BW |
2117 | num_regs--; |
2118 | opnd_rf = xtensa_operand_regfile (isa, opcode, last_opnd_cnt); | |
2119 | if (next_reg | |
2120 | != tc_get_register (xtensa_regfile_shortname (isa, opnd_rf))) | |
2121 | as_warn (_("incorrect register number, ignoring")); | |
2122 | next_reg++; | |
2123 | } | |
2124 | else | |
2125 | { | |
2126 | if (opnd_cnt >= opcode_operand_count) | |
2127 | { | |
2128 | as_warn (_("too many arguments")); | |
2129 | goto err; | |
2130 | } | |
9c2799c2 | 2131 | gas_assert (opnd_cnt < MAX_INSN_ARGS); |
43cd72b9 BW |
2132 | |
2133 | expression_maybe_register (opcode, opnd_cnt, tok); | |
2134 | next_reg = tok->X_add_number + 1; | |
2135 | ||
2136 | if (tok->X_op == O_illegal || tok->X_op == O_absent) | |
2137 | goto err; | |
2138 | if (xtensa_operand_is_register (isa, opcode, opnd_cnt) == 1) | |
2139 | { | |
2140 | num_regs = xtensa_operand_num_regs (isa, opcode, opnd_cnt) - 1; | |
2141 | /* minus 1 because we are seeing one right now */ | |
2142 | } | |
2143 | else | |
2144 | num_regs = 0; | |
e0001a05 | 2145 | |
43cd72b9 BW |
2146 | last_tok = tok; |
2147 | last_opnd_cnt = opnd_cnt; | |
1ec520b7 | 2148 | demand_empty_rest_of_line (); |
e0001a05 | 2149 | |
43cd72b9 BW |
2150 | do |
2151 | { | |
2152 | opnd_cnt += 1; | |
2153 | tok++; | |
2154 | } | |
2155 | while (xtensa_operand_is_visible (isa, opcode, opnd_cnt) == 0); | |
2156 | } | |
2157 | } | |
e0001a05 | 2158 | |
43cd72b9 BW |
2159 | if (num_regs > 0 && ((int) next_reg != last_tok->X_add_number + 1)) |
2160 | goto err; | |
e0001a05 NC |
2161 | |
2162 | insn->ntok = tok - insn->tok; | |
c138bc38 | 2163 | had_error = FALSE; |
e0001a05 NC |
2164 | |
2165 | err: | |
43cd72b9 | 2166 | input_line_pointer = old_input_line_pointer; |
e0001a05 NC |
2167 | return had_error; |
2168 | } | |
2169 | ||
2170 | ||
43cd72b9 | 2171 | static int |
7fa3d080 | 2172 | get_invisible_operands (TInsn *insn) |
43cd72b9 BW |
2173 | { |
2174 | xtensa_isa isa = xtensa_default_isa; | |
2175 | static xtensa_insnbuf slotbuf = NULL; | |
2176 | xtensa_format fmt; | |
2177 | xtensa_opcode opc = insn->opcode; | |
2178 | int slot, opnd, fmt_found; | |
2179 | unsigned val; | |
2180 | ||
2181 | if (!slotbuf) | |
2182 | slotbuf = xtensa_insnbuf_alloc (isa); | |
2183 | ||
2184 | /* Find format/slot where this can be encoded. */ | |
2185 | fmt_found = 0; | |
2186 | slot = 0; | |
2187 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
2188 | { | |
2189 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
2190 | { | |
2191 | if (xtensa_opcode_encode (isa, fmt, slot, slotbuf, opc) == 0) | |
2192 | { | |
2193 | fmt_found = 1; | |
2194 | break; | |
2195 | } | |
2196 | } | |
2197 | if (fmt_found) break; | |
2198 | } | |
2199 | ||
2200 | if (!fmt_found) | |
2201 | { | |
2202 | as_bad (_("cannot encode opcode \"%s\""), xtensa_opcode_name (isa, opc)); | |
2203 | return -1; | |
2204 | } | |
2205 | ||
2206 | /* First encode all the visible operands | |
2207 | (to deal with shared field operands). */ | |
2208 | for (opnd = 0; opnd < insn->ntok; opnd++) | |
2209 | { | |
2210 | if (xtensa_operand_is_visible (isa, opc, opnd) == 1 | |
2211 | && (insn->tok[opnd].X_op == O_register | |
2212 | || insn->tok[opnd].X_op == O_constant)) | |
2213 | { | |
2214 | val = insn->tok[opnd].X_add_number; | |
2215 | xtensa_operand_encode (isa, opc, opnd, &val); | |
2216 | xtensa_operand_set_field (isa, opc, opnd, fmt, slot, slotbuf, val); | |
2217 | } | |
2218 | } | |
2219 | ||
2220 | /* Then pull out the values for the invisible ones. */ | |
2221 | for (opnd = 0; opnd < insn->ntok; opnd++) | |
2222 | { | |
2223 | if (xtensa_operand_is_visible (isa, opc, opnd) == 0) | |
2224 | { | |
2225 | xtensa_operand_get_field (isa, opc, opnd, fmt, slot, slotbuf, &val); | |
2226 | xtensa_operand_decode (isa, opc, opnd, &val); | |
2227 | insn->tok[opnd].X_add_number = val; | |
2228 | if (xtensa_operand_is_register (isa, opc, opnd) == 1) | |
2229 | insn->tok[opnd].X_op = O_register; | |
2230 | else | |
2231 | insn->tok[opnd].X_op = O_constant; | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | return 0; | |
2236 | } | |
2237 | ||
2238 | ||
e0001a05 | 2239 | static void |
7fa3d080 | 2240 | xg_reverse_shift_count (char **cnt_argp) |
e0001a05 NC |
2241 | { |
2242 | char *cnt_arg, *new_arg; | |
2243 | cnt_arg = *cnt_argp; | |
2244 | ||
2245 | /* replace the argument with "31-(argument)" */ | |
78fb7e37 | 2246 | new_arg = concat ("31-(", cnt_arg, ")", (char *) NULL); |
e0001a05 NC |
2247 | |
2248 | free (cnt_arg); | |
2249 | *cnt_argp = new_arg; | |
2250 | } | |
2251 | ||
2252 | ||
2253 | /* If "arg" is a constant expression, return non-zero with the value | |
2254 | in *valp. */ | |
2255 | ||
2256 | static int | |
7fa3d080 | 2257 | xg_arg_is_constant (char *arg, offsetT *valp) |
e0001a05 NC |
2258 | { |
2259 | expressionS exp; | |
2260 | char *save_ptr = input_line_pointer; | |
2261 | ||
2262 | input_line_pointer = arg; | |
2263 | expression (&exp); | |
2264 | input_line_pointer = save_ptr; | |
2265 | ||
2266 | if (exp.X_op == O_constant) | |
2267 | { | |
2268 | *valp = exp.X_add_number; | |
2269 | return 1; | |
2270 | } | |
2271 | ||
2272 | return 0; | |
2273 | } | |
2274 | ||
2275 | ||
2276 | static void | |
b9bb4a93 | 2277 | xg_replace_opname (char **popname, const char *newop) |
e0001a05 NC |
2278 | { |
2279 | free (*popname); | |
4ec9d7d5 | 2280 | *popname = xstrdup (newop); |
e0001a05 NC |
2281 | } |
2282 | ||
2283 | ||
2284 | static int | |
7fa3d080 BW |
2285 | xg_check_num_args (int *pnum_args, |
2286 | int expected_num, | |
2287 | char *opname, | |
2288 | char **arg_strings) | |
e0001a05 NC |
2289 | { |
2290 | int num_args = *pnum_args; | |
2291 | ||
43cd72b9 | 2292 | if (num_args < expected_num) |
e0001a05 NC |
2293 | { |
2294 | as_bad (_("not enough operands (%d) for '%s'; expected %d"), | |
2295 | num_args, opname, expected_num); | |
2296 | return -1; | |
2297 | } | |
2298 | ||
2299 | if (num_args > expected_num) | |
2300 | { | |
2301 | as_warn (_("too many operands (%d) for '%s'; expected %d"), | |
2302 | num_args, opname, expected_num); | |
2303 | while (num_args-- > expected_num) | |
2304 | { | |
2305 | free (arg_strings[num_args]); | |
2306 | arg_strings[num_args] = 0; | |
2307 | } | |
2308 | *pnum_args = expected_num; | |
2309 | return -1; | |
2310 | } | |
2311 | ||
2312 | return 0; | |
2313 | } | |
2314 | ||
2315 | ||
43cd72b9 BW |
2316 | /* If the register is not specified as part of the opcode, |
2317 | then get it from the operand and move it to the opcode. */ | |
2318 | ||
e0001a05 | 2319 | static int |
7fa3d080 | 2320 | xg_translate_sysreg_op (char **popname, int *pnum_args, char **arg_strings) |
e0001a05 | 2321 | { |
43cd72b9 BW |
2322 | xtensa_isa isa = xtensa_default_isa; |
2323 | xtensa_sysreg sr; | |
e0001a05 | 2324 | char *opname, *new_opname; |
43cd72b9 BW |
2325 | const char *sr_name; |
2326 | int is_user, is_write; | |
e0001a05 NC |
2327 | |
2328 | opname = *popname; | |
2329 | if (*opname == '_') | |
80ca4e2c | 2330 | opname += 1; |
43cd72b9 BW |
2331 | is_user = (opname[1] == 'u'); |
2332 | is_write = (opname[0] == 'w'); | |
e0001a05 | 2333 | |
43cd72b9 | 2334 | /* Opname == [rw]ur or [rwx]sr... */ |
e0001a05 | 2335 | |
43cd72b9 BW |
2336 | if (xg_check_num_args (pnum_args, 2, opname, arg_strings)) |
2337 | return -1; | |
e0001a05 | 2338 | |
43cd72b9 BW |
2339 | /* Check if the argument is a symbolic register name. */ |
2340 | sr = xtensa_sysreg_lookup_name (isa, arg_strings[1]); | |
2341 | /* Handle WSR to "INTSET" as a special case. */ | |
2342 | if (sr == XTENSA_UNDEFINED && is_write && !is_user | |
2343 | && !strcasecmp (arg_strings[1], "intset")) | |
2344 | sr = xtensa_sysreg_lookup_name (isa, "interrupt"); | |
2345 | if (sr == XTENSA_UNDEFINED | |
2346 | || (xtensa_sysreg_is_user (isa, sr) == 1) != is_user) | |
2347 | { | |
2348 | /* Maybe it's a register number.... */ | |
2349 | offsetT val; | |
e0001a05 NC |
2350 | if (!xg_arg_is_constant (arg_strings[1], &val)) |
2351 | { | |
43cd72b9 BW |
2352 | as_bad (_("invalid register '%s' for '%s' instruction"), |
2353 | arg_strings[1], opname); | |
e0001a05 NC |
2354 | return -1; |
2355 | } | |
43cd72b9 BW |
2356 | sr = xtensa_sysreg_lookup (isa, val, is_user); |
2357 | if (sr == XTENSA_UNDEFINED) | |
e0001a05 | 2358 | { |
43cd72b9 | 2359 | as_bad (_("invalid register number (%ld) for '%s' instruction"), |
dd49a749 | 2360 | (long) val, opname); |
e0001a05 NC |
2361 | return -1; |
2362 | } | |
43cd72b9 | 2363 | } |
e0001a05 | 2364 | |
43cd72b9 BW |
2365 | /* Remove the last argument, which is now part of the opcode. */ |
2366 | free (arg_strings[1]); | |
2367 | arg_strings[1] = 0; | |
2368 | *pnum_args = 1; | |
2369 | ||
2370 | /* Translate the opcode. */ | |
2371 | sr_name = xtensa_sysreg_name (isa, sr); | |
2372 | /* Another special case for "WSR.INTSET".... */ | |
2373 | if (is_write && !is_user && !strcasecmp ("interrupt", sr_name)) | |
2374 | sr_name = "intset"; | |
4ec9d7d5 | 2375 | new_opname = concat (*popname, ".", sr_name, (char *) NULL); |
43cd72b9 BW |
2376 | free (*popname); |
2377 | *popname = new_opname; | |
2378 | ||
2379 | return 0; | |
2380 | } | |
2381 | ||
2382 | ||
2383 | static int | |
7fa3d080 | 2384 | xtensa_translate_old_userreg_ops (char **popname) |
43cd72b9 BW |
2385 | { |
2386 | xtensa_isa isa = xtensa_default_isa; | |
2387 | xtensa_sysreg sr; | |
2388 | char *opname, *new_opname; | |
2389 | const char *sr_name; | |
2390 | bfd_boolean has_underbar = FALSE; | |
2391 | ||
2392 | opname = *popname; | |
2393 | if (opname[0] == '_') | |
2394 | { | |
2395 | has_underbar = TRUE; | |
2396 | opname += 1; | |
2397 | } | |
2398 | ||
2399 | sr = xtensa_sysreg_lookup_name (isa, opname + 1); | |
2400 | if (sr != XTENSA_UNDEFINED) | |
2401 | { | |
2402 | /* The new default name ("nnn") is different from the old default | |
2403 | name ("URnnn"). The old default is handled below, and we don't | |
2404 | want to recognize [RW]nnn, so do nothing if the name is the (new) | |
2405 | default. */ | |
2406 | static char namebuf[10]; | |
2407 | sprintf (namebuf, "%d", xtensa_sysreg_number (isa, sr)); | |
2408 | if (strcmp (namebuf, opname + 1) == 0) | |
2409 | return 0; | |
2410 | } | |
2411 | else | |
2412 | { | |
2413 | offsetT val; | |
2414 | char *end; | |
2415 | ||
2416 | /* Only continue if the reg name is "URnnn". */ | |
2417 | if (opname[1] != 'u' || opname[2] != 'r') | |
2418 | return 0; | |
2419 | val = strtoul (opname + 3, &end, 10); | |
2420 | if (*end != '\0') | |
2421 | return 0; | |
2422 | ||
2423 | sr = xtensa_sysreg_lookup (isa, val, 1); | |
2424 | if (sr == XTENSA_UNDEFINED) | |
2425 | { | |
2426 | as_bad (_("invalid register number (%ld) for '%s'"), | |
dd49a749 | 2427 | (long) val, opname); |
43cd72b9 BW |
2428 | return -1; |
2429 | } | |
2430 | } | |
2431 | ||
2432 | /* Translate the opcode. */ | |
2433 | sr_name = xtensa_sysreg_name (isa, sr); | |
add39d23 | 2434 | new_opname = XNEWVEC (char, strlen (sr_name) + 6); |
43cd72b9 BW |
2435 | sprintf (new_opname, "%s%cur.%s", (has_underbar ? "_" : ""), |
2436 | opname[0], sr_name); | |
2437 | free (*popname); | |
2438 | *popname = new_opname; | |
2439 | ||
2440 | return 0; | |
2441 | } | |
2442 | ||
2443 | ||
2444 | static int | |
b9bb4a93 TS |
2445 | xtensa_translate_zero_immed (const char *old_op, |
2446 | const char *new_op, | |
7fa3d080 BW |
2447 | char **popname, |
2448 | int *pnum_args, | |
2449 | char **arg_strings) | |
43cd72b9 BW |
2450 | { |
2451 | char *opname; | |
2452 | offsetT val; | |
2453 | ||
2454 | opname = *popname; | |
9c2799c2 | 2455 | gas_assert (opname[0] != '_'); |
43cd72b9 BW |
2456 | |
2457 | if (strcmp (opname, old_op) != 0) | |
2458 | return 0; | |
e0001a05 | 2459 | |
43cd72b9 BW |
2460 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) |
2461 | return -1; | |
2462 | if (xg_arg_is_constant (arg_strings[1], &val) && val == 0) | |
2463 | { | |
2464 | xg_replace_opname (popname, new_op); | |
2465 | free (arg_strings[1]); | |
2466 | arg_strings[1] = arg_strings[2]; | |
2467 | arg_strings[2] = 0; | |
2468 | *pnum_args = 2; | |
e0001a05 NC |
2469 | } |
2470 | ||
2471 | return 0; | |
2472 | } | |
2473 | ||
2474 | ||
2475 | /* If the instruction is an idiom (i.e., a built-in macro), translate it. | |
2476 | Returns non-zero if an error was found. */ | |
2477 | ||
2478 | static int | |
7fa3d080 | 2479 | xg_translate_idioms (char **popname, int *pnum_args, char **arg_strings) |
e0001a05 NC |
2480 | { |
2481 | char *opname = *popname; | |
2482 | bfd_boolean has_underbar = FALSE; | |
2483 | ||
2484 | if (*opname == '_') | |
2485 | { | |
2486 | has_underbar = TRUE; | |
2487 | opname += 1; | |
2488 | } | |
2489 | ||
2490 | if (strcmp (opname, "mov") == 0) | |
2491 | { | |
43cd72b9 | 2492 | if (use_transform () && !has_underbar && density_supported) |
e0001a05 NC |
2493 | xg_replace_opname (popname, "mov.n"); |
2494 | else | |
2495 | { | |
2496 | if (xg_check_num_args (pnum_args, 2, opname, arg_strings)) | |
2497 | return -1; | |
2498 | xg_replace_opname (popname, (has_underbar ? "_or" : "or")); | |
4ec9d7d5 | 2499 | arg_strings[2] = xstrdup (arg_strings[1]); |
e0001a05 NC |
2500 | *pnum_args = 3; |
2501 | } | |
2502 | return 0; | |
2503 | } | |
2504 | ||
2505 | if (strcmp (opname, "bbsi.l") == 0) | |
2506 | { | |
2507 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) | |
2508 | return -1; | |
2509 | xg_replace_opname (popname, (has_underbar ? "_bbsi" : "bbsi")); | |
2510 | if (target_big_endian) | |
2511 | xg_reverse_shift_count (&arg_strings[1]); | |
2512 | return 0; | |
2513 | } | |
2514 | ||
2515 | if (strcmp (opname, "bbci.l") == 0) | |
2516 | { | |
2517 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) | |
2518 | return -1; | |
2519 | xg_replace_opname (popname, (has_underbar ? "_bbci" : "bbci")); | |
2520 | if (target_big_endian) | |
2521 | xg_reverse_shift_count (&arg_strings[1]); | |
2522 | return 0; | |
2523 | } | |
2524 | ||
eb6d9dce | 2525 | /* Don't do anything special with NOPs inside FLIX instructions. They |
3739860c | 2526 | are handled elsewhere. Real NOP instructions are always available |
eb6d9dce BW |
2527 | in configurations with FLIX, so this should never be an issue but |
2528 | check for it anyway. */ | |
2529 | if (!cur_vinsn.inside_bundle && xtensa_nop_opcode == XTENSA_UNDEFINED | |
43cd72b9 | 2530 | && strcmp (opname, "nop") == 0) |
e0001a05 | 2531 | { |
43cd72b9 | 2532 | if (use_transform () && !has_underbar && density_supported) |
e0001a05 NC |
2533 | xg_replace_opname (popname, "nop.n"); |
2534 | else | |
2535 | { | |
2536 | if (xg_check_num_args (pnum_args, 0, opname, arg_strings)) | |
2537 | return -1; | |
2538 | xg_replace_opname (popname, (has_underbar ? "_or" : "or")); | |
4ec9d7d5 TS |
2539 | arg_strings[0] = xstrdup ("a1"); |
2540 | arg_strings[1] = xstrdup ("a1"); | |
2541 | arg_strings[2] = xstrdup ("a1"); | |
e0001a05 NC |
2542 | *pnum_args = 3; |
2543 | } | |
2544 | return 0; | |
2545 | } | |
2546 | ||
43cd72b9 BW |
2547 | /* Recognize [RW]UR and [RWX]SR. */ |
2548 | if ((((opname[0] == 'r' || opname[0] == 'w') | |
2549 | && (opname[1] == 'u' || opname[1] == 's')) | |
2550 | || (opname[0] == 'x' && opname[1] == 's')) | |
2551 | && opname[2] == 'r' | |
2552 | && opname[3] == '\0') | |
e0001a05 NC |
2553 | return xg_translate_sysreg_op (popname, pnum_args, arg_strings); |
2554 | ||
43cd72b9 BW |
2555 | /* Backward compatibility for RUR and WUR: Recognize [RW]UR<nnn> and |
2556 | [RW]<name> if <name> is the non-default name of a user register. */ | |
2557 | if ((opname[0] == 'r' || opname[0] == 'w') | |
2558 | && xtensa_opcode_lookup (xtensa_default_isa, opname) == XTENSA_UNDEFINED) | |
2559 | return xtensa_translate_old_userreg_ops (popname); | |
e0001a05 | 2560 | |
43cd72b9 BW |
2561 | /* Relax branches that don't allow comparisons against an immediate value |
2562 | of zero to the corresponding branches with implicit zero immediates. */ | |
2563 | if (!has_underbar && use_transform ()) | |
2564 | { | |
2565 | if (xtensa_translate_zero_immed ("bnei", "bnez", popname, | |
2566 | pnum_args, arg_strings)) | |
2567 | return -1; | |
e0001a05 | 2568 | |
43cd72b9 BW |
2569 | if (xtensa_translate_zero_immed ("beqi", "beqz", popname, |
2570 | pnum_args, arg_strings)) | |
2571 | return -1; | |
e0001a05 | 2572 | |
43cd72b9 BW |
2573 | if (xtensa_translate_zero_immed ("bgei", "bgez", popname, |
2574 | pnum_args, arg_strings)) | |
2575 | return -1; | |
e0001a05 | 2576 | |
43cd72b9 BW |
2577 | if (xtensa_translate_zero_immed ("blti", "bltz", popname, |
2578 | pnum_args, arg_strings)) | |
2579 | return -1; | |
2580 | } | |
e0001a05 | 2581 | |
43cd72b9 BW |
2582 | return 0; |
2583 | } | |
e0001a05 | 2584 | |
43cd72b9 BW |
2585 | \f |
2586 | /* Functions for dealing with the Xtensa ISA. */ | |
e0001a05 | 2587 | |
43cd72b9 BW |
2588 | /* Currently the assembler only allows us to use a single target per |
2589 | fragment. Because of this, only one operand for a given | |
2590 | instruction may be symbolic. If there is a PC-relative operand, | |
2591 | the last one is chosen. Otherwise, the result is the number of the | |
2592 | last immediate operand, and if there are none of those, we fail and | |
2593 | return -1. */ | |
e0001a05 | 2594 | |
7fa3d080 BW |
2595 | static int |
2596 | get_relaxable_immed (xtensa_opcode opcode) | |
43cd72b9 BW |
2597 | { |
2598 | int last_immed = -1; | |
2599 | int noperands, opi; | |
e0001a05 | 2600 | |
43cd72b9 BW |
2601 | if (opcode == XTENSA_UNDEFINED) |
2602 | return -1; | |
e0001a05 | 2603 | |
43cd72b9 BW |
2604 | noperands = xtensa_opcode_num_operands (xtensa_default_isa, opcode); |
2605 | for (opi = noperands - 1; opi >= 0; opi--) | |
2606 | { | |
2607 | if (xtensa_operand_is_visible (xtensa_default_isa, opcode, opi) == 0) | |
2608 | continue; | |
2609 | if (xtensa_operand_is_PCrelative (xtensa_default_isa, opcode, opi) == 1) | |
2610 | return opi; | |
2611 | if (last_immed == -1 | |
2612 | && xtensa_operand_is_register (xtensa_default_isa, opcode, opi) == 0) | |
2613 | last_immed = opi; | |
e0001a05 | 2614 | } |
43cd72b9 | 2615 | return last_immed; |
e0001a05 NC |
2616 | } |
2617 | ||
e0001a05 | 2618 | |
43cd72b9 | 2619 | static xtensa_opcode |
7fa3d080 | 2620 | get_opcode_from_buf (const char *buf, int slot) |
e0001a05 | 2621 | { |
43cd72b9 BW |
2622 | static xtensa_insnbuf insnbuf = NULL; |
2623 | static xtensa_insnbuf slotbuf = NULL; | |
2624 | xtensa_isa isa = xtensa_default_isa; | |
2625 | xtensa_format fmt; | |
2626 | ||
2627 | if (!insnbuf) | |
e0001a05 | 2628 | { |
43cd72b9 BW |
2629 | insnbuf = xtensa_insnbuf_alloc (isa); |
2630 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 2631 | } |
e0001a05 | 2632 | |
d77b99c9 | 2633 | xtensa_insnbuf_from_chars (isa, insnbuf, (const unsigned char *) buf, 0); |
43cd72b9 BW |
2634 | fmt = xtensa_format_decode (isa, insnbuf); |
2635 | if (fmt == XTENSA_UNDEFINED) | |
2636 | return XTENSA_UNDEFINED; | |
e0001a05 | 2637 | |
43cd72b9 BW |
2638 | if (slot >= xtensa_format_num_slots (isa, fmt)) |
2639 | return XTENSA_UNDEFINED; | |
e0001a05 | 2640 | |
43cd72b9 BW |
2641 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
2642 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
e0001a05 NC |
2643 | } |
2644 | ||
2645 | ||
43cd72b9 | 2646 | #ifdef TENSILICA_DEBUG |
e0001a05 | 2647 | |
43cd72b9 | 2648 | /* For debugging, print out the mapping of opcode numbers to opcodes. */ |
e0001a05 | 2649 | |
7fa3d080 BW |
2650 | static void |
2651 | xtensa_print_insn_table (void) | |
43cd72b9 BW |
2652 | { |
2653 | int num_opcodes, num_operands; | |
2654 | xtensa_opcode opcode; | |
2655 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 | 2656 | |
43cd72b9 BW |
2657 | num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
2658 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
e0001a05 | 2659 | { |
43cd72b9 BW |
2660 | int opn; |
2661 | fprintf (stderr, "%d: %s: ", opcode, xtensa_opcode_name (isa, opcode)); | |
2662 | num_operands = xtensa_opcode_num_operands (isa, opcode); | |
2663 | for (opn = 0; opn < num_operands; opn++) | |
2664 | { | |
2665 | if (xtensa_operand_is_visible (isa, opcode, opn) == 0) | |
2666 | continue; | |
2667 | if (xtensa_operand_is_register (isa, opcode, opn) == 1) | |
2668 | { | |
2669 | xtensa_regfile opnd_rf = | |
2670 | xtensa_operand_regfile (isa, opcode, opn); | |
2671 | fprintf (stderr, "%s ", xtensa_regfile_shortname (isa, opnd_rf)); | |
2672 | } | |
2673 | else if (xtensa_operand_is_PCrelative (isa, opcode, opn) == 1) | |
2674 | fputs ("[lLr] ", stderr); | |
2675 | else | |
2676 | fputs ("i ", stderr); | |
2677 | } | |
2678 | fprintf (stderr, "\n"); | |
e0001a05 | 2679 | } |
e0001a05 NC |
2680 | } |
2681 | ||
2682 | ||
43cd72b9 | 2683 | static void |
7fa3d080 | 2684 | print_vliw_insn (xtensa_insnbuf vbuf) |
e0001a05 | 2685 | { |
e0001a05 | 2686 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
2687 | xtensa_format f = xtensa_format_decode (isa, vbuf); |
2688 | xtensa_insnbuf sbuf = xtensa_insnbuf_alloc (isa); | |
2689 | int op; | |
e0001a05 | 2690 | |
43cd72b9 | 2691 | fprintf (stderr, "format = %d\n", f); |
e0001a05 | 2692 | |
43cd72b9 BW |
2693 | for (op = 0; op < xtensa_format_num_slots (isa, f); op++) |
2694 | { | |
2695 | xtensa_opcode opcode; | |
2696 | const char *opname; | |
2697 | int operands; | |
2698 | ||
2699 | xtensa_format_get_slot (isa, f, op, vbuf, sbuf); | |
2700 | opcode = xtensa_opcode_decode (isa, f, op, sbuf); | |
2701 | opname = xtensa_opcode_name (isa, opcode); | |
2702 | ||
2703 | fprintf (stderr, "op in slot %i is %s;\n", op, opname); | |
2704 | fprintf (stderr, " operands = "); | |
2705 | for (operands = 0; | |
2706 | operands < xtensa_opcode_num_operands (isa, opcode); | |
2707 | operands++) | |
2708 | { | |
2709 | unsigned int val; | |
2710 | if (xtensa_operand_is_visible (isa, opcode, operands) == 0) | |
2711 | continue; | |
2712 | xtensa_operand_get_field (isa, opcode, operands, f, op, sbuf, &val); | |
2713 | xtensa_operand_decode (isa, opcode, operands, &val); | |
2714 | fprintf (stderr, "%d ", val); | |
2715 | } | |
2716 | fprintf (stderr, "\n"); | |
2717 | } | |
2718 | xtensa_insnbuf_free (isa, sbuf); | |
e0001a05 NC |
2719 | } |
2720 | ||
43cd72b9 BW |
2721 | #endif /* TENSILICA_DEBUG */ |
2722 | ||
e0001a05 NC |
2723 | |
2724 | static bfd_boolean | |
7fa3d080 | 2725 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 | 2726 | { |
43cd72b9 BW |
2727 | xtensa_isa isa = xtensa_default_isa; |
2728 | int n, num_operands; | |
e0001a05 | 2729 | |
64b607e6 | 2730 | if (xtensa_opcode_is_call (isa, opcode) != 1) |
e0001a05 NC |
2731 | return FALSE; |
2732 | ||
43cd72b9 BW |
2733 | num_operands = xtensa_opcode_num_operands (isa, opcode); |
2734 | for (n = 0; n < num_operands; n++) | |
2735 | { | |
2736 | if (xtensa_operand_is_register (isa, opcode, n) == 0 | |
2737 | && xtensa_operand_is_PCrelative (isa, opcode, n) == 1) | |
2738 | return TRUE; | |
2739 | } | |
2740 | return FALSE; | |
e0001a05 NC |
2741 | } |
2742 | ||
2743 | ||
43cd72b9 BW |
2744 | /* Convert from BFD relocation type code to slot and operand number. |
2745 | Returns non-zero on failure. */ | |
e0001a05 | 2746 | |
43cd72b9 | 2747 | static int |
7fa3d080 | 2748 | decode_reloc (bfd_reloc_code_real_type reloc, int *slot, bfd_boolean *is_alt) |
e0001a05 | 2749 | { |
43cd72b9 BW |
2750 | if (reloc >= BFD_RELOC_XTENSA_SLOT0_OP |
2751 | && reloc <= BFD_RELOC_XTENSA_SLOT14_OP) | |
e0001a05 | 2752 | { |
43cd72b9 BW |
2753 | *slot = reloc - BFD_RELOC_XTENSA_SLOT0_OP; |
2754 | *is_alt = FALSE; | |
e0001a05 | 2755 | } |
43cd72b9 BW |
2756 | else if (reloc >= BFD_RELOC_XTENSA_SLOT0_ALT |
2757 | && reloc <= BFD_RELOC_XTENSA_SLOT14_ALT) | |
e0001a05 | 2758 | { |
43cd72b9 BW |
2759 | *slot = reloc - BFD_RELOC_XTENSA_SLOT0_ALT; |
2760 | *is_alt = TRUE; | |
e0001a05 | 2761 | } |
43cd72b9 BW |
2762 | else |
2763 | return -1; | |
2764 | ||
2765 | return 0; | |
e0001a05 NC |
2766 | } |
2767 | ||
2768 | ||
43cd72b9 BW |
2769 | /* Convert from slot number to BFD relocation type code for the |
2770 | standard PC-relative relocations. Return BFD_RELOC_NONE on | |
2771 | failure. */ | |
e0001a05 | 2772 | |
43cd72b9 | 2773 | static bfd_reloc_code_real_type |
7fa3d080 | 2774 | encode_reloc (int slot) |
e0001a05 | 2775 | { |
43cd72b9 BW |
2776 | if (slot < 0 || slot > 14) |
2777 | return BFD_RELOC_NONE; | |
2778 | ||
2779 | return BFD_RELOC_XTENSA_SLOT0_OP + slot; | |
e0001a05 NC |
2780 | } |
2781 | ||
2782 | ||
43cd72b9 BW |
2783 | /* Convert from slot numbers to BFD relocation type code for the |
2784 | "alternate" relocations. Return BFD_RELOC_NONE on failure. */ | |
e0001a05 | 2785 | |
43cd72b9 | 2786 | static bfd_reloc_code_real_type |
7fa3d080 | 2787 | encode_alt_reloc (int slot) |
e0001a05 | 2788 | { |
43cd72b9 BW |
2789 | if (slot < 0 || slot > 14) |
2790 | return BFD_RELOC_NONE; | |
2791 | ||
2792 | return BFD_RELOC_XTENSA_SLOT0_ALT + slot; | |
e0001a05 NC |
2793 | } |
2794 | ||
2795 | ||
2796 | static void | |
7fa3d080 BW |
2797 | xtensa_insnbuf_set_operand (xtensa_insnbuf slotbuf, |
2798 | xtensa_format fmt, | |
2799 | int slot, | |
2800 | xtensa_opcode opcode, | |
2801 | int operand, | |
2802 | uint32 value, | |
2803 | const char *file, | |
2804 | unsigned int line) | |
e0001a05 | 2805 | { |
e0001a05 NC |
2806 | uint32 valbuf = value; |
2807 | ||
43cd72b9 | 2808 | if (xtensa_operand_encode (xtensa_default_isa, opcode, operand, &valbuf)) |
e0001a05 | 2809 | { |
43cd72b9 BW |
2810 | if (xtensa_operand_is_PCrelative (xtensa_default_isa, opcode, operand) |
2811 | == 1) | |
2812 | as_bad_where ((char *) file, line, | |
3739860c | 2813 | _("operand %d of '%s' has out of range value '%u'"), |
d7c531cd BW |
2814 | operand + 1, |
2815 | xtensa_opcode_name (xtensa_default_isa, opcode), | |
2816 | value); | |
43cd72b9 BW |
2817 | else |
2818 | as_bad_where ((char *) file, line, | |
d7c531cd BW |
2819 | _("operand %d of '%s' has invalid value '%u'"), |
2820 | operand + 1, | |
2821 | xtensa_opcode_name (xtensa_default_isa, opcode), | |
2822 | value); | |
43cd72b9 | 2823 | return; |
e0001a05 NC |
2824 | } |
2825 | ||
43cd72b9 BW |
2826 | xtensa_operand_set_field (xtensa_default_isa, opcode, operand, fmt, slot, |
2827 | slotbuf, valbuf); | |
e0001a05 NC |
2828 | } |
2829 | ||
2830 | ||
2831 | static uint32 | |
7fa3d080 BW |
2832 | xtensa_insnbuf_get_operand (xtensa_insnbuf slotbuf, |
2833 | xtensa_format fmt, | |
2834 | int slot, | |
2835 | xtensa_opcode opcode, | |
2836 | int opnum) | |
e0001a05 | 2837 | { |
43cd72b9 BW |
2838 | uint32 val = 0; |
2839 | (void) xtensa_operand_get_field (xtensa_default_isa, opcode, opnum, | |
2840 | fmt, slot, slotbuf, &val); | |
2841 | (void) xtensa_operand_decode (xtensa_default_isa, opcode, opnum, &val); | |
2842 | return val; | |
e0001a05 NC |
2843 | } |
2844 | ||
e0001a05 | 2845 | \f |
7fa3d080 | 2846 | /* Checks for rules from xtensa-relax tables. */ |
e0001a05 | 2847 | |
7fa3d080 BW |
2848 | /* The routine xg_instruction_matches_option_term must return TRUE |
2849 | when a given option term is true. The meaning of all of the option | |
19e8f41a | 2850 | terms is given interpretation by this function. */ |
e0001a05 | 2851 | |
7fa3d080 | 2852 | static bfd_boolean |
19e8f41a | 2853 | xg_instruction_matches_option_term (TInsn *insn, const ReqOrOption *option) |
e0001a05 | 2854 | { |
7fa3d080 BW |
2855 | if (strcmp (option->option_name, "realnop") == 0 |
2856 | || strncmp (option->option_name, "IsaUse", 6) == 0) | |
2857 | { | |
2858 | /* These conditions were evaluated statically when building the | |
2859 | relaxation table. There's no need to reevaluate them now. */ | |
2860 | return TRUE; | |
2861 | } | |
19e8f41a BW |
2862 | else if (strcmp (option->option_name, "FREEREG") == 0) |
2863 | return insn->extra_arg.X_op == O_register; | |
7fa3d080 BW |
2864 | else |
2865 | { | |
2866 | as_fatal (_("internal error: unknown option name '%s'"), | |
2867 | option->option_name); | |
2868 | } | |
e0001a05 NC |
2869 | } |
2870 | ||
2871 | ||
7fa3d080 BW |
2872 | static bfd_boolean |
2873 | xg_instruction_matches_or_options (TInsn *insn, | |
2874 | const ReqOrOptionList *or_option) | |
e0001a05 | 2875 | { |
7fa3d080 BW |
2876 | const ReqOrOption *option; |
2877 | /* Must match each of the AND terms. */ | |
2878 | for (option = or_option; option != NULL; option = option->next) | |
e0001a05 | 2879 | { |
7fa3d080 BW |
2880 | if (xg_instruction_matches_option_term (insn, option)) |
2881 | return TRUE; | |
e0001a05 | 2882 | } |
7fa3d080 | 2883 | return FALSE; |
e0001a05 NC |
2884 | } |
2885 | ||
2886 | ||
7fa3d080 BW |
2887 | static bfd_boolean |
2888 | xg_instruction_matches_options (TInsn *insn, const ReqOptionList *options) | |
e0001a05 | 2889 | { |
7fa3d080 BW |
2890 | const ReqOption *req_options; |
2891 | /* Must match each of the AND terms. */ | |
2892 | for (req_options = options; | |
2893 | req_options != NULL; | |
2894 | req_options = req_options->next) | |
e0001a05 | 2895 | { |
7fa3d080 BW |
2896 | /* Must match one of the OR clauses. */ |
2897 | if (!xg_instruction_matches_or_options (insn, | |
2898 | req_options->or_option_terms)) | |
2899 | return FALSE; | |
e0001a05 | 2900 | } |
7fa3d080 | 2901 | return TRUE; |
e0001a05 NC |
2902 | } |
2903 | ||
2904 | ||
7fa3d080 | 2905 | /* Return the transition rule that matches or NULL if none matches. */ |
e0001a05 | 2906 | |
7fa3d080 BW |
2907 | static bfd_boolean |
2908 | xg_instruction_matches_rule (TInsn *insn, TransitionRule *rule) | |
e0001a05 | 2909 | { |
7fa3d080 | 2910 | PreconditionList *condition_l; |
e0001a05 | 2911 | |
7fa3d080 BW |
2912 | if (rule->opcode != insn->opcode) |
2913 | return FALSE; | |
e0001a05 | 2914 | |
7fa3d080 BW |
2915 | for (condition_l = rule->conditions; |
2916 | condition_l != NULL; | |
2917 | condition_l = condition_l->next) | |
e0001a05 | 2918 | { |
7fa3d080 BW |
2919 | expressionS *exp1; |
2920 | expressionS *exp2; | |
2921 | Precondition *cond = condition_l->precond; | |
e0001a05 | 2922 | |
7fa3d080 | 2923 | switch (cond->typ) |
e0001a05 | 2924 | { |
7fa3d080 BW |
2925 | case OP_CONSTANT: |
2926 | /* The expression must be the constant. */ | |
9c2799c2 | 2927 | gas_assert (cond->op_num < insn->ntok); |
7fa3d080 BW |
2928 | exp1 = &insn->tok[cond->op_num]; |
2929 | if (expr_is_const (exp1)) | |
2930 | { | |
2931 | switch (cond->cmp) | |
2932 | { | |
2933 | case OP_EQUAL: | |
2934 | if (get_expr_const (exp1) != cond->op_data) | |
2935 | return FALSE; | |
2936 | break; | |
2937 | case OP_NOTEQUAL: | |
2938 | if (get_expr_const (exp1) == cond->op_data) | |
2939 | return FALSE; | |
2940 | break; | |
2941 | default: | |
2942 | return FALSE; | |
2943 | } | |
2944 | } | |
2945 | else if (expr_is_register (exp1)) | |
2946 | { | |
2947 | switch (cond->cmp) | |
2948 | { | |
2949 | case OP_EQUAL: | |
2950 | if (get_expr_register (exp1) != cond->op_data) | |
2951 | return FALSE; | |
2952 | break; | |
2953 | case OP_NOTEQUAL: | |
2954 | if (get_expr_register (exp1) == cond->op_data) | |
2955 | return FALSE; | |
2956 | break; | |
2957 | default: | |
2958 | return FALSE; | |
2959 | } | |
2960 | } | |
2961 | else | |
2962 | return FALSE; | |
2963 | break; | |
2964 | ||
2965 | case OP_OPERAND: | |
9c2799c2 NC |
2966 | gas_assert (cond->op_num < insn->ntok); |
2967 | gas_assert (cond->op_data < insn->ntok); | |
7fa3d080 BW |
2968 | exp1 = &insn->tok[cond->op_num]; |
2969 | exp2 = &insn->tok[cond->op_data]; | |
2970 | ||
2971 | switch (cond->cmp) | |
2972 | { | |
2973 | case OP_EQUAL: | |
2974 | if (!expr_is_equal (exp1, exp2)) | |
2975 | return FALSE; | |
2976 | break; | |
2977 | case OP_NOTEQUAL: | |
2978 | if (expr_is_equal (exp1, exp2)) | |
2979 | return FALSE; | |
2980 | break; | |
2981 | } | |
2982 | break; | |
2983 | ||
2984 | case OP_LITERAL: | |
2985 | case OP_LABEL: | |
2986 | default: | |
2987 | return FALSE; | |
2988 | } | |
2989 | } | |
2990 | if (!xg_instruction_matches_options (insn, rule->options)) | |
2991 | return FALSE; | |
2992 | ||
2993 | return TRUE; | |
2994 | } | |
2995 | ||
2996 | ||
2997 | static int | |
2998 | transition_rule_cmp (const TransitionRule *a, const TransitionRule *b) | |
2999 | { | |
3000 | bfd_boolean a_greater = FALSE; | |
3001 | bfd_boolean b_greater = FALSE; | |
3002 | ||
3003 | ReqOptionList *l_a = a->options; | |
3004 | ReqOptionList *l_b = b->options; | |
3005 | ||
3006 | /* We only care if they both are the same except for | |
3007 | a const16 vs. an l32r. */ | |
3008 | ||
3009 | while (l_a && l_b && ((l_a->next == NULL) == (l_b->next == NULL))) | |
3010 | { | |
3011 | ReqOrOptionList *l_or_a = l_a->or_option_terms; | |
3012 | ReqOrOptionList *l_or_b = l_b->or_option_terms; | |
3013 | while (l_or_a && l_or_b && ((l_a->next == NULL) == (l_b->next == NULL))) | |
3014 | { | |
3015 | if (l_or_a->is_true != l_or_b->is_true) | |
3016 | return 0; | |
3017 | if (strcmp (l_or_a->option_name, l_or_b->option_name) != 0) | |
3018 | { | |
3019 | /* This is the case we care about. */ | |
3020 | if (strcmp (l_or_a->option_name, "IsaUseConst16") == 0 | |
3021 | && strcmp (l_or_b->option_name, "IsaUseL32R") == 0) | |
3022 | { | |
3023 | if (prefer_const16) | |
3024 | a_greater = TRUE; | |
3025 | else | |
3026 | b_greater = TRUE; | |
3027 | } | |
3028 | else if (strcmp (l_or_a->option_name, "IsaUseL32R") == 0 | |
3029 | && strcmp (l_or_b->option_name, "IsaUseConst16") == 0) | |
3030 | { | |
3031 | if (prefer_const16) | |
3032 | b_greater = TRUE; | |
3033 | else | |
3034 | a_greater = TRUE; | |
3035 | } | |
3036 | else | |
3037 | return 0; | |
3038 | } | |
3039 | l_or_a = l_or_a->next; | |
3040 | l_or_b = l_or_b->next; | |
3041 | } | |
3042 | if (l_or_a || l_or_b) | |
3043 | return 0; | |
3044 | ||
3045 | l_a = l_a->next; | |
3046 | l_b = l_b->next; | |
3047 | } | |
3048 | if (l_a || l_b) | |
3049 | return 0; | |
3050 | ||
3051 | /* Incomparable if the substitution was used differently in two cases. */ | |
3052 | if (a_greater && b_greater) | |
3053 | return 0; | |
3054 | ||
3055 | if (b_greater) | |
3056 | return 1; | |
3057 | if (a_greater) | |
3058 | return -1; | |
3059 | ||
3060 | return 0; | |
3061 | } | |
3062 | ||
3063 | ||
3064 | static TransitionRule * | |
3065 | xg_instruction_match (TInsn *insn) | |
3066 | { | |
3067 | TransitionTable *table = xg_build_simplify_table (&transition_rule_cmp); | |
3068 | TransitionList *l; | |
9c2799c2 | 3069 | gas_assert (insn->opcode < table->num_opcodes); |
7fa3d080 BW |
3070 | |
3071 | /* Walk through all of the possible transitions. */ | |
3072 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3073 | { | |
3074 | TransitionRule *rule = l->rule; | |
3075 | if (xg_instruction_matches_rule (insn, rule)) | |
3076 | return rule; | |
3077 | } | |
3078 | return NULL; | |
3079 | } | |
3080 | ||
3081 | \f | |
3082 | /* Various Other Internal Functions. */ | |
3083 | ||
3084 | static bfd_boolean | |
3085 | is_unique_insn_expansion (TransitionRule *r) | |
3086 | { | |
3087 | if (!r->to_instr || r->to_instr->next != NULL) | |
3088 | return FALSE; | |
3089 | if (r->to_instr->typ != INSTR_INSTR) | |
3090 | return FALSE; | |
3091 | return TRUE; | |
3092 | } | |
3093 | ||
3094 | ||
84b08ed9 BW |
3095 | /* Check if there is exactly one relaxation for INSN that converts it to |
3096 | another instruction of equal or larger size. If so, and if TARG is | |
3097 | non-null, go ahead and generate the relaxed instruction into TARG. If | |
3098 | NARROW_ONLY is true, then only consider relaxations that widen a narrow | |
3099 | instruction, i.e., ignore relaxations that convert to an instruction of | |
3100 | equal size. In some contexts where this function is used, only | |
c138bc38 | 3101 | a single widening is allowed and the NARROW_ONLY argument is used to |
84b08ed9 BW |
3102 | exclude cases like ADDI being "widened" to an ADDMI, which may |
3103 | later be relaxed to an ADDMI/ADDI pair. */ | |
7fa3d080 | 3104 | |
84b08ed9 BW |
3105 | bfd_boolean |
3106 | xg_is_single_relaxable_insn (TInsn *insn, TInsn *targ, bfd_boolean narrow_only) | |
7fa3d080 BW |
3107 | { |
3108 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3109 | TransitionList *l; | |
84b08ed9 | 3110 | TransitionRule *match = 0; |
7fa3d080 | 3111 | |
9c2799c2 NC |
3112 | gas_assert (insn->insn_type == ITYPE_INSN); |
3113 | gas_assert (insn->opcode < table->num_opcodes); | |
7fa3d080 BW |
3114 | |
3115 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3116 | { | |
3117 | TransitionRule *rule = l->rule; | |
3118 | ||
3119 | if (xg_instruction_matches_rule (insn, rule) | |
84b08ed9 BW |
3120 | && is_unique_insn_expansion (rule) |
3121 | && (xg_get_single_size (insn->opcode) + (narrow_only ? 1 : 0) | |
3122 | <= xg_get_single_size (rule->to_instr->opcode))) | |
7fa3d080 | 3123 | { |
84b08ed9 BW |
3124 | if (match) |
3125 | return FALSE; | |
3126 | match = rule; | |
7fa3d080 BW |
3127 | } |
3128 | } | |
84b08ed9 BW |
3129 | if (!match) |
3130 | return FALSE; | |
3131 | ||
3132 | if (targ) | |
3133 | xg_build_to_insn (targ, insn, match->to_instr); | |
3134 | return TRUE; | |
7fa3d080 BW |
3135 | } |
3136 | ||
3137 | ||
3138 | /* Return the maximum number of bytes this opcode can expand to. */ | |
3139 | ||
3140 | static int | |
3141 | xg_get_max_insn_widen_size (xtensa_opcode opcode) | |
3142 | { | |
3143 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3144 | TransitionList *l; | |
3145 | int max_size = xg_get_single_size (opcode); | |
3146 | ||
9c2799c2 | 3147 | gas_assert (opcode < table->num_opcodes); |
7fa3d080 BW |
3148 | |
3149 | for (l = table->table[opcode]; l != NULL; l = l->next) | |
3150 | { | |
3151 | TransitionRule *rule = l->rule; | |
3152 | BuildInstr *build_list; | |
3153 | int this_size = 0; | |
3154 | ||
3155 | if (!rule) | |
3156 | continue; | |
3157 | build_list = rule->to_instr; | |
3158 | if (is_unique_insn_expansion (rule)) | |
3159 | { | |
9c2799c2 | 3160 | gas_assert (build_list->typ == INSTR_INSTR); |
7fa3d080 BW |
3161 | this_size = xg_get_max_insn_widen_size (build_list->opcode); |
3162 | } | |
3163 | else | |
3164 | for (; build_list != NULL; build_list = build_list->next) | |
3165 | { | |
3166 | switch (build_list->typ) | |
3167 | { | |
3168 | case INSTR_INSTR: | |
3169 | this_size += xg_get_single_size (build_list->opcode); | |
3170 | break; | |
3171 | case INSTR_LITERAL_DEF: | |
3172 | case INSTR_LABEL_DEF: | |
e0001a05 NC |
3173 | default: |
3174 | break; | |
3175 | } | |
3176 | } | |
3177 | if (this_size > max_size) | |
3178 | max_size = this_size; | |
3179 | } | |
3180 | return max_size; | |
3181 | } | |
3182 | ||
3183 | ||
3184 | /* Return the maximum number of literal bytes this opcode can generate. */ | |
3185 | ||
7fa3d080 BW |
3186 | static int |
3187 | xg_get_max_insn_widen_literal_size (xtensa_opcode opcode) | |
e0001a05 | 3188 | { |
43cd72b9 | 3189 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); |
e0001a05 NC |
3190 | TransitionList *l; |
3191 | int max_size = 0; | |
3192 | ||
9c2799c2 | 3193 | gas_assert (opcode < table->num_opcodes); |
e0001a05 NC |
3194 | |
3195 | for (l = table->table[opcode]; l != NULL; l = l->next) | |
3196 | { | |
3197 | TransitionRule *rule = l->rule; | |
3198 | BuildInstr *build_list; | |
3199 | int this_size = 0; | |
3200 | ||
3201 | if (!rule) | |
3202 | continue; | |
3203 | build_list = rule->to_instr; | |
3204 | if (is_unique_insn_expansion (rule)) | |
3205 | { | |
9c2799c2 | 3206 | gas_assert (build_list->typ == INSTR_INSTR); |
e0001a05 NC |
3207 | this_size = xg_get_max_insn_widen_literal_size (build_list->opcode); |
3208 | } | |
3209 | else | |
3210 | for (; build_list != NULL; build_list = build_list->next) | |
3211 | { | |
3212 | switch (build_list->typ) | |
3213 | { | |
3214 | case INSTR_LITERAL_DEF: | |
43cd72b9 | 3215 | /* Hard-coded 4-byte literal. */ |
e0001a05 NC |
3216 | this_size += 4; |
3217 | break; | |
3218 | case INSTR_INSTR: | |
3219 | case INSTR_LABEL_DEF: | |
3220 | default: | |
3221 | break; | |
3222 | } | |
3223 | } | |
3224 | if (this_size > max_size) | |
3225 | max_size = this_size; | |
3226 | } | |
3227 | return max_size; | |
3228 | } | |
3229 | ||
3230 | ||
7fa3d080 BW |
3231 | static bfd_boolean |
3232 | xg_is_relaxable_insn (TInsn *insn, int lateral_steps) | |
3233 | { | |
3234 | int steps_taken = 0; | |
3235 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3236 | TransitionList *l; | |
3237 | ||
9c2799c2 NC |
3238 | gas_assert (insn->insn_type == ITYPE_INSN); |
3239 | gas_assert (insn->opcode < table->num_opcodes); | |
7fa3d080 BW |
3240 | |
3241 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3242 | { | |
3243 | TransitionRule *rule = l->rule; | |
3244 | ||
3245 | if (xg_instruction_matches_rule (insn, rule)) | |
3246 | { | |
3247 | if (steps_taken == lateral_steps) | |
3248 | return TRUE; | |
3249 | steps_taken++; | |
3250 | } | |
3251 | } | |
3252 | return FALSE; | |
3253 | } | |
3254 | ||
3255 | ||
3256 | static symbolS * | |
3257 | get_special_literal_symbol (void) | |
3258 | { | |
3259 | static symbolS *sym = NULL; | |
3260 | ||
3261 | if (sym == NULL) | |
3262 | sym = symbol_find_or_make ("SPECIAL_LITERAL0\001"); | |
3263 | return sym; | |
3264 | } | |
3265 | ||
3266 | ||
3267 | static symbolS * | |
3268 | get_special_label_symbol (void) | |
3269 | { | |
3270 | static symbolS *sym = NULL; | |
3271 | ||
3272 | if (sym == NULL) | |
3273 | sym = symbol_find_or_make ("SPECIAL_LABEL0\001"); | |
3274 | return sym; | |
3275 | } | |
3276 | ||
3277 | ||
3278 | static bfd_boolean | |
3279 | xg_valid_literal_expression (const expressionS *exp) | |
3280 | { | |
3281 | switch (exp->X_op) | |
3282 | { | |
3283 | case O_constant: | |
3284 | case O_symbol: | |
3285 | case O_big: | |
3286 | case O_uminus: | |
3287 | case O_subtract: | |
3288 | case O_pltrel: | |
1bbb5f21 | 3289 | case O_pcrel: |
28dbbc02 BW |
3290 | case O_tlsfunc: |
3291 | case O_tlsarg: | |
3292 | case O_tpoff: | |
3293 | case O_dtpoff: | |
7fa3d080 BW |
3294 | return TRUE; |
3295 | default: | |
3296 | return FALSE; | |
3297 | } | |
3298 | } | |
3299 | ||
3300 | ||
3301 | /* This will check to see if the value can be converted into the | |
3302 | operand type. It will return TRUE if it does not fit. */ | |
3303 | ||
3304 | static bfd_boolean | |
3305 | xg_check_operand (int32 value, xtensa_opcode opcode, int operand) | |
3306 | { | |
3307 | uint32 valbuf = value; | |
3308 | if (xtensa_operand_encode (xtensa_default_isa, opcode, operand, &valbuf)) | |
3309 | return TRUE; | |
3310 | return FALSE; | |
3311 | } | |
3312 | ||
3313 | ||
3314 | /* Assumes: All immeds are constants. Check that all constants fit | |
3315 | into their immeds; return FALSE if not. */ | |
3316 | ||
3317 | static bfd_boolean | |
3318 | xg_immeds_fit (const TInsn *insn) | |
3319 | { | |
3320 | xtensa_isa isa = xtensa_default_isa; | |
3321 | int i; | |
3322 | ||
3323 | int n = insn->ntok; | |
9c2799c2 | 3324 | gas_assert (insn->insn_type == ITYPE_INSN); |
7fa3d080 BW |
3325 | for (i = 0; i < n; ++i) |
3326 | { | |
91d6fa6a NC |
3327 | const expressionS *exp = &insn->tok[i]; |
3328 | ||
7fa3d080 BW |
3329 | if (xtensa_operand_is_register (isa, insn->opcode, i) == 1) |
3330 | continue; | |
3331 | ||
91d6fa6a | 3332 | switch (exp->X_op) |
7fa3d080 BW |
3333 | { |
3334 | case O_register: | |
3335 | case O_constant: | |
91d6fa6a | 3336 | if (xg_check_operand (exp->X_add_number, insn->opcode, i)) |
7fa3d080 BW |
3337 | return FALSE; |
3338 | break; | |
3339 | ||
3340 | default: | |
3341 | /* The symbol should have a fixup associated with it. */ | |
9c2799c2 | 3342 | gas_assert (FALSE); |
7fa3d080 BW |
3343 | break; |
3344 | } | |
3345 | } | |
3346 | return TRUE; | |
3347 | } | |
3348 | ||
3349 | ||
3350 | /* This should only be called after we have an initial | |
3351 | estimate of the addresses. */ | |
3352 | ||
3353 | static bfd_boolean | |
3354 | xg_symbolic_immeds_fit (const TInsn *insn, | |
3355 | segT pc_seg, | |
3356 | fragS *pc_frag, | |
3357 | offsetT pc_offset, | |
3358 | long stretch) | |
e0001a05 | 3359 | { |
7fa3d080 BW |
3360 | xtensa_isa isa = xtensa_default_isa; |
3361 | symbolS *symbolP; | |
3362 | fragS *sym_frag; | |
3363 | offsetT target, pc; | |
3364 | uint32 new_offset; | |
3365 | int i; | |
3366 | int n = insn->ntok; | |
e0001a05 | 3367 | |
9c2799c2 | 3368 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 | 3369 | |
7fa3d080 | 3370 | for (i = 0; i < n; ++i) |
e0001a05 | 3371 | { |
91d6fa6a NC |
3372 | const expressionS *exp = &insn->tok[i]; |
3373 | ||
7fa3d080 BW |
3374 | if (xtensa_operand_is_register (isa, insn->opcode, i) == 1) |
3375 | continue; | |
e0001a05 | 3376 | |
91d6fa6a | 3377 | switch (exp->X_op) |
e0001a05 | 3378 | { |
7fa3d080 BW |
3379 | case O_register: |
3380 | case O_constant: | |
91d6fa6a | 3381 | if (xg_check_operand (exp->X_add_number, insn->opcode, i)) |
7fa3d080 BW |
3382 | return FALSE; |
3383 | break; | |
e0001a05 | 3384 | |
7fa3d080 BW |
3385 | case O_lo16: |
3386 | case O_hi16: | |
3387 | /* Check for the worst case. */ | |
3388 | if (xg_check_operand (0xffff, insn->opcode, i)) | |
3389 | return FALSE; | |
3390 | break; | |
e0001a05 | 3391 | |
7fa3d080 | 3392 | case O_symbol: |
7c834684 | 3393 | /* We only allow symbols for PC-relative references. |
7fa3d080 | 3394 | If pc_frag == 0, then we don't have frag locations yet. */ |
7c834684 BW |
3395 | if (pc_frag == 0 |
3396 | || xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 0) | |
7fa3d080 | 3397 | return FALSE; |
e0001a05 | 3398 | |
8e6bc631 BW |
3399 | /* If it is a weak symbol or a symbol in a different section, |
3400 | it cannot be known to fit at assembly time. */ | |
91d6fa6a NC |
3401 | if (S_IS_WEAK (exp->X_add_symbol) |
3402 | || S_GET_SEGMENT (exp->X_add_symbol) != pc_seg) | |
7c834684 | 3403 | { |
8e6bc631 | 3404 | /* For a direct call with --no-longcalls, be optimistic and |
38f9cb7f BW |
3405 | assume it will be in range. If the symbol is weak and |
3406 | undefined, it may remain undefined at link-time, in which | |
3407 | case it will have a zero value and almost certainly be out | |
3408 | of range for a direct call; thus, relax for undefined weak | |
3409 | symbols even if longcalls is not enabled. */ | |
8e6bc631 | 3410 | if (is_direct_call_opcode (insn->opcode) |
38f9cb7f | 3411 | && ! pc_frag->tc_frag_data.use_longcalls |
91d6fa6a NC |
3412 | && (! S_IS_WEAK (exp->X_add_symbol) |
3413 | || S_IS_DEFINED (exp->X_add_symbol))) | |
7c834684 | 3414 | return TRUE; |
7c834684 | 3415 | |
8e6bc631 BW |
3416 | return FALSE; |
3417 | } | |
e0001a05 | 3418 | |
91d6fa6a | 3419 | symbolP = exp->X_add_symbol; |
7fa3d080 | 3420 | sym_frag = symbol_get_frag (symbolP); |
91d6fa6a | 3421 | target = S_GET_VALUE (symbolP) + exp->X_add_number; |
7fa3d080 | 3422 | pc = pc_frag->fr_address + pc_offset; |
e0001a05 | 3423 | |
7fa3d080 BW |
3424 | /* If frag has yet to be reached on this pass, assume it |
3425 | will move by STRETCH just as we did. If this is not so, | |
3426 | it will be because some frag between grows, and that will | |
3427 | force another pass. Beware zero-length frags. There | |
3428 | should be a faster way to do this. */ | |
3429 | ||
3430 | if (stretch != 0 | |
3431 | && sym_frag->relax_marker != pc_frag->relax_marker | |
3432 | && S_GET_SEGMENT (symbolP) == pc_seg) | |
3433 | { | |
3434 | target += stretch; | |
3435 | } | |
c138bc38 | 3436 | |
7fa3d080 BW |
3437 | new_offset = target; |
3438 | xtensa_operand_do_reloc (isa, insn->opcode, i, &new_offset, pc); | |
3439 | if (xg_check_operand (new_offset, insn->opcode, i)) | |
3440 | return FALSE; | |
3441 | break; | |
3442 | ||
3443 | default: | |
3444 | /* The symbol should have a fixup associated with it. */ | |
3445 | return FALSE; | |
3446 | } | |
3447 | } | |
3448 | ||
3449 | return TRUE; | |
e0001a05 NC |
3450 | } |
3451 | ||
3452 | ||
43cd72b9 | 3453 | /* Return TRUE on success. */ |
e0001a05 | 3454 | |
7fa3d080 BW |
3455 | static bfd_boolean |
3456 | xg_build_to_insn (TInsn *targ, TInsn *insn, BuildInstr *bi) | |
e0001a05 NC |
3457 | { |
3458 | BuildOp *op; | |
3459 | symbolS *sym; | |
3460 | ||
60242db2 | 3461 | tinsn_init (targ); |
b224e962 BW |
3462 | targ->debug_line = insn->debug_line; |
3463 | targ->loc_directive_seen = insn->loc_directive_seen; | |
e0001a05 NC |
3464 | switch (bi->typ) |
3465 | { | |
3466 | case INSTR_INSTR: | |
3467 | op = bi->ops; | |
3468 | targ->opcode = bi->opcode; | |
3469 | targ->insn_type = ITYPE_INSN; | |
3470 | targ->is_specific_opcode = FALSE; | |
3471 | ||
3472 | for (; op != NULL; op = op->next) | |
3473 | { | |
3474 | int op_num = op->op_num; | |
3475 | int op_data = op->op_data; | |
3476 | ||
9c2799c2 | 3477 | gas_assert (op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3478 | |
3479 | if (targ->ntok <= op_num) | |
3480 | targ->ntok = op_num + 1; | |
3481 | ||
3482 | switch (op->typ) | |
3483 | { | |
3484 | case OP_CONSTANT: | |
3485 | set_expr_const (&targ->tok[op_num], op_data); | |
3486 | break; | |
3487 | case OP_OPERAND: | |
9c2799c2 | 3488 | gas_assert (op_data < insn->ntok); |
e0001a05 NC |
3489 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); |
3490 | break; | |
19e8f41a BW |
3491 | case OP_FREEREG: |
3492 | if (insn->extra_arg.X_op != O_register) | |
3493 | return FALSE; | |
3494 | copy_expr (&targ->tok[op_num], &insn->extra_arg); | |
3495 | break; | |
e0001a05 NC |
3496 | case OP_LITERAL: |
3497 | sym = get_special_literal_symbol (); | |
3498 | set_expr_symbol_offset (&targ->tok[op_num], sym, 0); | |
28dbbc02 BW |
3499 | if (insn->tok[op_data].X_op == O_tlsfunc |
3500 | || insn->tok[op_data].X_op == O_tlsarg) | |
19e8f41a | 3501 | copy_expr (&targ->extra_arg, &insn->tok[op_data]); |
e0001a05 NC |
3502 | break; |
3503 | case OP_LABEL: | |
3504 | sym = get_special_label_symbol (); | |
3505 | set_expr_symbol_offset (&targ->tok[op_num], sym, 0); | |
3506 | break; | |
43cd72b9 BW |
3507 | case OP_OPERAND_HI16U: |
3508 | case OP_OPERAND_LOW16U: | |
9c2799c2 | 3509 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3510 | if (expr_is_const (&insn->tok[op_data])) |
3511 | { | |
3512 | long val; | |
3513 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3514 | val = xg_apply_userdef_op_fn (op->typ, | |
3515 | targ->tok[op_num]. | |
3516 | X_add_number); | |
3517 | targ->tok[op_num].X_add_number = val; | |
3518 | } | |
3519 | else | |
3520 | { | |
3521 | /* For const16 we can create relocations for these. */ | |
3522 | if (targ->opcode == XTENSA_UNDEFINED | |
3523 | || (targ->opcode != xtensa_const16_opcode)) | |
3524 | return FALSE; | |
9c2799c2 | 3525 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3526 | /* Need to build a O_lo16 or O_hi16. */ |
3527 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3528 | if (targ->tok[op_num].X_op == O_symbol) | |
3529 | { | |
3530 | if (op->typ == OP_OPERAND_HI16U) | |
3531 | targ->tok[op_num].X_op = O_hi16; | |
3532 | else if (op->typ == OP_OPERAND_LOW16U) | |
3533 | targ->tok[op_num].X_op = O_lo16; | |
3534 | else | |
3535 | return FALSE; | |
3536 | } | |
3537 | } | |
3538 | break; | |
e0001a05 NC |
3539 | default: |
3540 | /* currently handles: | |
3541 | OP_OPERAND_LOW8 | |
3542 | OP_OPERAND_HI24S | |
3543 | OP_OPERAND_F32MINUS */ | |
3544 | if (xg_has_userdef_op_fn (op->typ)) | |
3545 | { | |
9c2799c2 | 3546 | gas_assert (op_data < insn->ntok); |
e0001a05 NC |
3547 | if (expr_is_const (&insn->tok[op_data])) |
3548 | { | |
3549 | long val; | |
3550 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3551 | val = xg_apply_userdef_op_fn (op->typ, | |
3552 | targ->tok[op_num]. | |
3553 | X_add_number); | |
3554 | targ->tok[op_num].X_add_number = val; | |
3555 | } | |
3556 | else | |
3557 | return FALSE; /* We cannot use a relocation for this. */ | |
3558 | break; | |
3559 | } | |
9c2799c2 | 3560 | gas_assert (0); |
e0001a05 NC |
3561 | break; |
3562 | } | |
3563 | } | |
3564 | break; | |
3565 | ||
3566 | case INSTR_LITERAL_DEF: | |
3567 | op = bi->ops; | |
3568 | targ->opcode = XTENSA_UNDEFINED; | |
3569 | targ->insn_type = ITYPE_LITERAL; | |
3570 | targ->is_specific_opcode = FALSE; | |
3571 | for (; op != NULL; op = op->next) | |
3572 | { | |
3573 | int op_num = op->op_num; | |
3574 | int op_data = op->op_data; | |
9c2799c2 | 3575 | gas_assert (op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3576 | |
3577 | if (targ->ntok <= op_num) | |
3578 | targ->ntok = op_num + 1; | |
3579 | ||
3580 | switch (op->typ) | |
3581 | { | |
3582 | case OP_OPERAND: | |
9c2799c2 | 3583 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3584 | /* We can only pass resolvable literals through. */ |
3585 | if (!xg_valid_literal_expression (&insn->tok[op_data])) | |
3586 | return FALSE; | |
e0001a05 NC |
3587 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); |
3588 | break; | |
3589 | case OP_LITERAL: | |
3590 | case OP_CONSTANT: | |
3591 | case OP_LABEL: | |
3592 | default: | |
9c2799c2 | 3593 | gas_assert (0); |
e0001a05 NC |
3594 | break; |
3595 | } | |
3596 | } | |
3597 | break; | |
3598 | ||
3599 | case INSTR_LABEL_DEF: | |
3600 | op = bi->ops; | |
3601 | targ->opcode = XTENSA_UNDEFINED; | |
3602 | targ->insn_type = ITYPE_LABEL; | |
3603 | targ->is_specific_opcode = FALSE; | |
43cd72b9 | 3604 | /* Literal with no ops is a label? */ |
9c2799c2 | 3605 | gas_assert (op == NULL); |
e0001a05 NC |
3606 | break; |
3607 | ||
3608 | default: | |
9c2799c2 | 3609 | gas_assert (0); |
e0001a05 NC |
3610 | } |
3611 | ||
3612 | return TRUE; | |
3613 | } | |
3614 | ||
3615 | ||
43cd72b9 | 3616 | /* Return TRUE on success. */ |
e0001a05 | 3617 | |
7fa3d080 BW |
3618 | static bfd_boolean |
3619 | xg_build_to_stack (IStack *istack, TInsn *insn, BuildInstr *bi) | |
e0001a05 NC |
3620 | { |
3621 | for (; bi != NULL; bi = bi->next) | |
3622 | { | |
3623 | TInsn *next_insn = istack_push_space (istack); | |
3624 | ||
3625 | if (!xg_build_to_insn (next_insn, insn, bi)) | |
3626 | return FALSE; | |
3627 | } | |
3628 | return TRUE; | |
3629 | } | |
3630 | ||
3631 | ||
43cd72b9 | 3632 | /* Return TRUE on valid expansion. */ |
e0001a05 | 3633 | |
7fa3d080 BW |
3634 | static bfd_boolean |
3635 | xg_expand_to_stack (IStack *istack, TInsn *insn, int lateral_steps) | |
e0001a05 NC |
3636 | { |
3637 | int stack_size = istack->ninsn; | |
3638 | int steps_taken = 0; | |
43cd72b9 | 3639 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); |
e0001a05 NC |
3640 | TransitionList *l; |
3641 | ||
9c2799c2 NC |
3642 | gas_assert (insn->insn_type == ITYPE_INSN); |
3643 | gas_assert (insn->opcode < table->num_opcodes); | |
e0001a05 NC |
3644 | |
3645 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3646 | { | |
3647 | TransitionRule *rule = l->rule; | |
3648 | ||
3649 | if (xg_instruction_matches_rule (insn, rule)) | |
3650 | { | |
3651 | if (lateral_steps == steps_taken) | |
3652 | { | |
3653 | int i; | |
3654 | ||
3655 | /* This is it. Expand the rule to the stack. */ | |
3656 | if (!xg_build_to_stack (istack, insn, rule->to_instr)) | |
3657 | return FALSE; | |
3658 | ||
3659 | /* Check to see if it fits. */ | |
3660 | for (i = stack_size; i < istack->ninsn; i++) | |
3661 | { | |
91d6fa6a | 3662 | TInsn *tinsn = &istack->insn[i]; |
e0001a05 | 3663 | |
91d6fa6a NC |
3664 | if (tinsn->insn_type == ITYPE_INSN |
3665 | && !tinsn_has_symbolic_operands (tinsn) | |
3666 | && !xg_immeds_fit (tinsn)) | |
e0001a05 NC |
3667 | { |
3668 | istack->ninsn = stack_size; | |
3669 | return FALSE; | |
3670 | } | |
3671 | } | |
3672 | return TRUE; | |
3673 | } | |
3674 | steps_taken++; | |
3675 | } | |
3676 | } | |
3677 | return FALSE; | |
3678 | } | |
3679 | ||
43cd72b9 | 3680 | \f |
43cd72b9 | 3681 | /* Relax the assembly instruction at least "min_steps". |
b81bf389 BW |
3682 | Return the number of steps taken. |
3683 | ||
3684 | For relaxation to correctly terminate, every relaxation chain must | |
3685 | terminate in one of two ways: | |
3686 | ||
3687 | 1. If the chain from one instruction to the next consists entirely of | |
3688 | single instructions, then the chain *must* handle all possible | |
3689 | immediates without failing. It must not ever fail because an | |
3690 | immediate is out of range. The MOVI.N -> MOVI -> L32R relaxation | |
3691 | chain is one example. L32R loads 32 bits, and there cannot be an | |
3692 | immediate larger than 32 bits, so it satisfies this condition. | |
3693 | Single instruction relaxation chains are as defined by | |
3694 | xg_is_single_relaxable_instruction. | |
3695 | ||
3696 | 2. Otherwise, the chain must end in a multi-instruction expansion: e.g., | |
3697 | BNEZ.N -> BNEZ -> BNEZ.W15 -> BENZ.N/J | |
3698 | ||
3699 | Strictly speaking, in most cases you can violate condition 1 and be OK | |
3700 | -- in particular when the last two instructions have the same single | |
3701 | size. But nevertheless, you should guarantee the above two conditions. | |
3702 | ||
3703 | We could fix this so that single-instruction expansions correctly | |
3704 | terminate when they can't handle the range, but the error messages are | |
3705 | worse, and it actually turns out that in every case but one (18-bit wide | |
3706 | branches), you need a multi-instruction expansion to get the full range | |
3707 | anyway. And because 18-bit branches are handled identically to 15-bit | |
3708 | branches, there isn't any point in changing it. */ | |
e0001a05 | 3709 | |
7fa3d080 BW |
3710 | static int |
3711 | xg_assembly_relax (IStack *istack, | |
3712 | TInsn *insn, | |
3713 | segT pc_seg, | |
3714 | fragS *pc_frag, /* if pc_frag == 0, not pc-relative */ | |
3715 | offsetT pc_offset, /* offset in fragment */ | |
3716 | int min_steps, /* minimum conversion steps */ | |
3717 | long stretch) /* number of bytes stretched so far */ | |
e0001a05 NC |
3718 | { |
3719 | int steps_taken = 0; | |
3720 | ||
b81bf389 BW |
3721 | /* Some of its immeds don't fit. Try to build a relaxed version. |
3722 | This may go through a couple of stages of single instruction | |
3723 | transformations before we get there. */ | |
e0001a05 NC |
3724 | |
3725 | TInsn single_target; | |
3726 | TInsn current_insn; | |
3727 | int lateral_steps = 0; | |
3728 | int istack_size = istack->ninsn; | |
3729 | ||
3730 | if (xg_symbolic_immeds_fit (insn, pc_seg, pc_frag, pc_offset, stretch) | |
3731 | && steps_taken >= min_steps) | |
3732 | { | |
3733 | istack_push (istack, insn); | |
3734 | return steps_taken; | |
3735 | } | |
43cd72b9 | 3736 | current_insn = *insn; |
e0001a05 | 3737 | |
7c834684 | 3738 | /* Walk through all of the single instruction expansions. */ |
84b08ed9 | 3739 | while (xg_is_single_relaxable_insn (¤t_insn, &single_target, FALSE)) |
e0001a05 | 3740 | { |
21af2bbd | 3741 | steps_taken++; |
e0001a05 NC |
3742 | if (xg_symbolic_immeds_fit (&single_target, pc_seg, pc_frag, pc_offset, |
3743 | stretch)) | |
3744 | { | |
e0001a05 NC |
3745 | if (steps_taken >= min_steps) |
3746 | { | |
3747 | istack_push (istack, &single_target); | |
3748 | return steps_taken; | |
3749 | } | |
3750 | } | |
43cd72b9 | 3751 | current_insn = single_target; |
e0001a05 NC |
3752 | } |
3753 | ||
3754 | /* Now check for a multi-instruction expansion. */ | |
3755 | while (xg_is_relaxable_insn (¤t_insn, lateral_steps)) | |
3756 | { | |
3757 | if (xg_symbolic_immeds_fit (¤t_insn, pc_seg, pc_frag, pc_offset, | |
3758 | stretch)) | |
3759 | { | |
3760 | if (steps_taken >= min_steps) | |
3761 | { | |
3762 | istack_push (istack, ¤t_insn); | |
3763 | return steps_taken; | |
3764 | } | |
3765 | } | |
3766 | steps_taken++; | |
3767 | if (xg_expand_to_stack (istack, ¤t_insn, lateral_steps)) | |
3768 | { | |
3769 | if (steps_taken >= min_steps) | |
3770 | return steps_taken; | |
3771 | } | |
3772 | lateral_steps++; | |
3773 | istack->ninsn = istack_size; | |
3774 | } | |
3775 | ||
3776 | /* It's not going to work -- use the original. */ | |
3777 | istack_push (istack, insn); | |
3778 | return steps_taken; | |
3779 | } | |
3780 | ||
3781 | ||
7fa3d080 BW |
3782 | static void |
3783 | xg_finish_frag (char *last_insn, | |
3784 | enum xtensa_relax_statesE frag_state, | |
3785 | enum xtensa_relax_statesE slot0_state, | |
3786 | int max_growth, | |
3787 | bfd_boolean is_insn) | |
e0001a05 NC |
3788 | { |
3789 | /* Finish off this fragment so that it has at LEAST the desired | |
3790 | max_growth. If it doesn't fit in this fragment, close this one | |
3791 | and start a new one. In either case, return a pointer to the | |
3792 | beginning of the growth area. */ | |
3793 | ||
3794 | fragS *old_frag; | |
43cd72b9 | 3795 | |
542f8b94 | 3796 | frag_grow (max_growth); |
e0001a05 NC |
3797 | old_frag = frag_now; |
3798 | ||
3799 | frag_now->fr_opcode = last_insn; | |
3800 | if (is_insn) | |
3801 | frag_now->tc_frag_data.is_insn = TRUE; | |
3802 | ||
3803 | frag_var (rs_machine_dependent, max_growth, max_growth, | |
43cd72b9 BW |
3804 | frag_state, frag_now->fr_symbol, frag_now->fr_offset, last_insn); |
3805 | ||
3806 | old_frag->tc_frag_data.slot_subtypes[0] = slot0_state; | |
3807 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
3808 | |
3809 | /* Just to make sure that we did not split it up. */ | |
9c2799c2 | 3810 | gas_assert (old_frag->fr_next == frag_now); |
e0001a05 NC |
3811 | } |
3812 | ||
3813 | ||
7fa3d080 BW |
3814 | /* Return TRUE if the target frag is one of the next non-empty frags. */ |
3815 | ||
3816 | static bfd_boolean | |
3817 | is_next_frag_target (const fragS *fragP, const fragS *target) | |
3818 | { | |
3819 | if (fragP == NULL) | |
3820 | return FALSE; | |
3821 | ||
3822 | for (; fragP; fragP = fragP->fr_next) | |
3823 | { | |
3824 | if (fragP == target) | |
3825 | return TRUE; | |
3826 | if (fragP->fr_fix != 0) | |
3827 | return FALSE; | |
3828 | if (fragP->fr_type == rs_fill && fragP->fr_offset != 0) | |
3829 | return FALSE; | |
3830 | if ((fragP->fr_type == rs_align || fragP->fr_type == rs_align_code) | |
3831 | && ((fragP->fr_address % (1 << fragP->fr_offset)) != 0)) | |
3832 | return FALSE; | |
3833 | if (fragP->fr_type == rs_space) | |
3834 | return FALSE; | |
3835 | } | |
3836 | return FALSE; | |
3837 | } | |
3838 | ||
3839 | ||
e0001a05 | 3840 | static bfd_boolean |
7fa3d080 | 3841 | is_branch_jmp_to_next (TInsn *insn, fragS *fragP) |
e0001a05 NC |
3842 | { |
3843 | xtensa_isa isa = xtensa_default_isa; | |
3844 | int i; | |
43cd72b9 | 3845 | int num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
e0001a05 NC |
3846 | int target_op = -1; |
3847 | symbolS *sym; | |
3848 | fragS *target_frag; | |
3849 | ||
64b607e6 BW |
3850 | if (xtensa_opcode_is_branch (isa, insn->opcode) != 1 |
3851 | && xtensa_opcode_is_jump (isa, insn->opcode) != 1) | |
e0001a05 NC |
3852 | return FALSE; |
3853 | ||
3854 | for (i = 0; i < num_ops; i++) | |
3855 | { | |
43cd72b9 | 3856 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1) |
e0001a05 NC |
3857 | { |
3858 | target_op = i; | |
3859 | break; | |
3860 | } | |
3861 | } | |
3862 | if (target_op == -1) | |
3863 | return FALSE; | |
3864 | ||
3865 | if (insn->ntok <= target_op) | |
3866 | return FALSE; | |
3867 | ||
3868 | if (insn->tok[target_op].X_op != O_symbol) | |
3869 | return FALSE; | |
3870 | ||
3871 | sym = insn->tok[target_op].X_add_symbol; | |
3872 | if (sym == NULL) | |
3873 | return FALSE; | |
3874 | ||
3875 | if (insn->tok[target_op].X_add_number != 0) | |
3876 | return FALSE; | |
3877 | ||
3878 | target_frag = symbol_get_frag (sym); | |
3879 | if (target_frag == NULL) | |
3880 | return FALSE; | |
3881 | ||
c138bc38 | 3882 | if (is_next_frag_target (fragP->fr_next, target_frag) |
e0001a05 NC |
3883 | && S_GET_VALUE (sym) == target_frag->fr_address) |
3884 | return TRUE; | |
3885 | ||
3886 | return FALSE; | |
3887 | } | |
3888 | ||
3889 | ||
3890 | static void | |
7fa3d080 | 3891 | xg_add_branch_and_loop_targets (TInsn *insn) |
e0001a05 NC |
3892 | { |
3893 | xtensa_isa isa = xtensa_default_isa; | |
7fa3d080 | 3894 | int num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
43cd72b9 | 3895 | |
7fa3d080 BW |
3896 | if (xtensa_opcode_is_loop (isa, insn->opcode) == 1) |
3897 | { | |
3898 | int i = 1; | |
3899 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1 | |
3900 | && insn->tok[i].X_op == O_symbol) | |
3901 | symbol_get_tc (insn->tok[i].X_add_symbol)->is_loop_target = TRUE; | |
3902 | return; | |
3903 | } | |
e0001a05 | 3904 | |
7fa3d080 BW |
3905 | if (xtensa_opcode_is_branch (isa, insn->opcode) == 1 |
3906 | || xtensa_opcode_is_loop (isa, insn->opcode) == 1) | |
e0001a05 | 3907 | { |
7fa3d080 BW |
3908 | int i; |
3909 | ||
3910 | for (i = 0; i < insn->ntok && i < num_ops; i++) | |
3911 | { | |
3912 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1 | |
3913 | && insn->tok[i].X_op == O_symbol) | |
3914 | { | |
3915 | symbolS *sym = insn->tok[i].X_add_symbol; | |
3916 | symbol_get_tc (sym)->is_branch_target = TRUE; | |
3917 | if (S_IS_DEFINED (sym)) | |
3918 | symbol_get_frag (sym)->tc_frag_data.is_branch_target = TRUE; | |
3919 | } | |
3920 | } | |
e0001a05 | 3921 | } |
e0001a05 NC |
3922 | } |
3923 | ||
3924 | ||
43cd72b9 | 3925 | /* Return FALSE if no error. */ |
e0001a05 | 3926 | |
7fa3d080 BW |
3927 | static bfd_boolean |
3928 | xg_build_token_insn (BuildInstr *instr_spec, TInsn *old_insn, TInsn *new_insn) | |
e0001a05 NC |
3929 | { |
3930 | int num_ops = 0; | |
3931 | BuildOp *b_op; | |
3932 | ||
3933 | switch (instr_spec->typ) | |
3934 | { | |
3935 | case INSTR_INSTR: | |
3936 | new_insn->insn_type = ITYPE_INSN; | |
3937 | new_insn->opcode = instr_spec->opcode; | |
e0001a05 NC |
3938 | break; |
3939 | case INSTR_LITERAL_DEF: | |
3940 | new_insn->insn_type = ITYPE_LITERAL; | |
3941 | new_insn->opcode = XTENSA_UNDEFINED; | |
e0001a05 NC |
3942 | break; |
3943 | case INSTR_LABEL_DEF: | |
b224e962 | 3944 | abort (); |
e0001a05 | 3945 | } |
b224e962 BW |
3946 | new_insn->is_specific_opcode = FALSE; |
3947 | new_insn->debug_line = old_insn->debug_line; | |
3948 | new_insn->loc_directive_seen = old_insn->loc_directive_seen; | |
e0001a05 NC |
3949 | |
3950 | for (b_op = instr_spec->ops; b_op != NULL; b_op = b_op->next) | |
3951 | { | |
3952 | expressionS *exp; | |
3953 | const expressionS *src_exp; | |
3954 | ||
3955 | num_ops++; | |
3956 | switch (b_op->typ) | |
3957 | { | |
3958 | case OP_CONSTANT: | |
3959 | /* The expression must be the constant. */ | |
9c2799c2 | 3960 | gas_assert (b_op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3961 | exp = &new_insn->tok[b_op->op_num]; |
3962 | set_expr_const (exp, b_op->op_data); | |
3963 | break; | |
3964 | ||
3965 | case OP_OPERAND: | |
9c2799c2 NC |
3966 | gas_assert (b_op->op_num < MAX_INSN_ARGS); |
3967 | gas_assert (b_op->op_data < (unsigned) old_insn->ntok); | |
e0001a05 NC |
3968 | src_exp = &old_insn->tok[b_op->op_data]; |
3969 | exp = &new_insn->tok[b_op->op_num]; | |
3970 | copy_expr (exp, src_exp); | |
3971 | break; | |
3972 | ||
3973 | case OP_LITERAL: | |
3974 | case OP_LABEL: | |
3975 | as_bad (_("can't handle generation of literal/labels yet")); | |
9c2799c2 | 3976 | gas_assert (0); |
e0001a05 NC |
3977 | |
3978 | default: | |
3979 | as_bad (_("can't handle undefined OP TYPE")); | |
9c2799c2 | 3980 | gas_assert (0); |
e0001a05 NC |
3981 | } |
3982 | } | |
3983 | ||
3984 | new_insn->ntok = num_ops; | |
3985 | return FALSE; | |
3986 | } | |
3987 | ||
3988 | ||
43cd72b9 | 3989 | /* Return TRUE if it was simplified. */ |
e0001a05 | 3990 | |
7fa3d080 BW |
3991 | static bfd_boolean |
3992 | xg_simplify_insn (TInsn *old_insn, TInsn *new_insn) | |
e0001a05 | 3993 | { |
43cd72b9 | 3994 | TransitionRule *rule; |
e0001a05 | 3995 | BuildInstr *insn_spec; |
43cd72b9 BW |
3996 | |
3997 | if (old_insn->is_specific_opcode || !density_supported) | |
3998 | return FALSE; | |
3999 | ||
4000 | rule = xg_instruction_match (old_insn); | |
e0001a05 NC |
4001 | if (rule == NULL) |
4002 | return FALSE; | |
4003 | ||
4004 | insn_spec = rule->to_instr; | |
4005 | /* There should only be one. */ | |
9c2799c2 NC |
4006 | gas_assert (insn_spec != NULL); |
4007 | gas_assert (insn_spec->next == NULL); | |
e0001a05 NC |
4008 | if (insn_spec->next != NULL) |
4009 | return FALSE; | |
4010 | ||
4011 | xg_build_token_insn (insn_spec, old_insn, new_insn); | |
4012 | ||
4013 | return TRUE; | |
4014 | } | |
4015 | ||
4016 | ||
4017 | /* xg_expand_assembly_insn: (1) Simplify the instruction, i.e., l32i -> | |
4018 | l32i.n. (2) Check the number of operands. (3) Place the instruction | |
7c834684 BW |
4019 | tokens into the stack or relax it and place multiple |
4020 | instructions/literals onto the stack. Return FALSE if no error. */ | |
e0001a05 NC |
4021 | |
4022 | static bfd_boolean | |
7fa3d080 | 4023 | xg_expand_assembly_insn (IStack *istack, TInsn *orig_insn) |
e0001a05 NC |
4024 | { |
4025 | int noperands; | |
4026 | TInsn new_insn; | |
7c834684 BW |
4027 | bfd_boolean do_expand; |
4028 | ||
60242db2 | 4029 | tinsn_init (&new_insn); |
e0001a05 | 4030 | |
43cd72b9 BW |
4031 | /* Narrow it if we can. xg_simplify_insn now does all the |
4032 | appropriate checking (e.g., for the density option). */ | |
4033 | if (xg_simplify_insn (orig_insn, &new_insn)) | |
4034 | orig_insn = &new_insn; | |
e0001a05 | 4035 | |
43cd72b9 BW |
4036 | noperands = xtensa_opcode_num_operands (xtensa_default_isa, |
4037 | orig_insn->opcode); | |
e0001a05 NC |
4038 | if (orig_insn->ntok < noperands) |
4039 | { | |
992a06ee AM |
4040 | as_bad (ngettext ("found %d operand for '%s': Expected %d", |
4041 | "found %d operands for '%s': Expected %d", | |
4042 | orig_insn->ntok), | |
e0001a05 NC |
4043 | orig_insn->ntok, |
4044 | xtensa_opcode_name (xtensa_default_isa, orig_insn->opcode), | |
4045 | noperands); | |
4046 | return TRUE; | |
4047 | } | |
4048 | if (orig_insn->ntok > noperands) | |
992a06ee AM |
4049 | as_warn (ngettext ("found %d operand for '%s': Expected %d", |
4050 | "found %d operands for '%s': Expected %d", | |
4051 | orig_insn->ntok), | |
e0001a05 NC |
4052 | orig_insn->ntok, |
4053 | xtensa_opcode_name (xtensa_default_isa, orig_insn->opcode), | |
4054 | noperands); | |
4055 | ||
43cd72b9 | 4056 | /* If there are not enough operands, we will assert above. If there |
e0001a05 | 4057 | are too many, just cut out the extras here. */ |
e0001a05 NC |
4058 | orig_insn->ntok = noperands; |
4059 | ||
e0001a05 NC |
4060 | if (tinsn_has_invalid_symbolic_operands (orig_insn)) |
4061 | return TRUE; | |
4062 | ||
d12f9798 BW |
4063 | /* Special case for extui opcode which has constraints not handled |
4064 | by the ordinary operand encoding checks. The number of operands | |
4065 | and related syntax issues have already been checked. */ | |
4066 | if (orig_insn->opcode == xtensa_extui_opcode) | |
4067 | { | |
4068 | int shiftimm = orig_insn->tok[2].X_add_number; | |
4069 | int maskimm = orig_insn->tok[3].X_add_number; | |
4070 | if (shiftimm + maskimm > 32) | |
4071 | { | |
4072 | as_bad (_("immediate operands sum to greater than 32")); | |
4073 | return TRUE; | |
4074 | } | |
4075 | } | |
4076 | ||
7c834684 BW |
4077 | /* If the instruction will definitely need to be relaxed, it is better |
4078 | to expand it now for better scheduling. Decide whether to expand | |
4079 | now.... */ | |
4080 | do_expand = (!orig_insn->is_specific_opcode && use_transform ()); | |
4081 | ||
4082 | /* Calls should be expanded to longcalls only in the backend relaxation | |
4083 | so that the assembly scheduler will keep the L32R/CALLX instructions | |
4084 | adjacent. */ | |
4085 | if (is_direct_call_opcode (orig_insn->opcode)) | |
4086 | do_expand = FALSE; | |
e0001a05 NC |
4087 | |
4088 | if (tinsn_has_symbolic_operands (orig_insn)) | |
4089 | { | |
7c834684 BW |
4090 | /* The values of symbolic operands are not known yet, so only expand |
4091 | now if an operand is "complex" (e.g., difference of symbols) and | |
4092 | will have to be stored as a literal regardless of the value. */ | |
4093 | if (!tinsn_has_complex_operands (orig_insn)) | |
4094 | do_expand = FALSE; | |
e0001a05 | 4095 | } |
7c834684 BW |
4096 | else if (xg_immeds_fit (orig_insn)) |
4097 | do_expand = FALSE; | |
4098 | ||
4099 | if (do_expand) | |
4100 | xg_assembly_relax (istack, orig_insn, 0, 0, 0, 0, 0); | |
e0001a05 | 4101 | else |
7c834684 | 4102 | istack_push (istack, orig_insn); |
e0001a05 | 4103 | |
e0001a05 NC |
4104 | return FALSE; |
4105 | } | |
4106 | ||
4107 | ||
7fa3d080 | 4108 | /* Return TRUE if the section flags are marked linkonce |
74869ac7 BW |
4109 | or the name is .gnu.linkonce.*. */ |
4110 | ||
4111 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; | |
7fa3d080 BW |
4112 | |
4113 | static bfd_boolean | |
4114 | get_is_linkonce_section (bfd *abfd ATTRIBUTE_UNUSED, segT sec) | |
4115 | { | |
4116 | flagword flags, link_once_flags; | |
4117 | ||
fd361982 | 4118 | flags = bfd_section_flags (sec); |
7fa3d080 BW |
4119 | link_once_flags = (flags & SEC_LINK_ONCE); |
4120 | ||
4121 | /* Flags might not be set yet. */ | |
74869ac7 BW |
4122 | if (!link_once_flags |
4123 | && strncmp (segment_name (sec), ".gnu.linkonce.", linkonce_len) == 0) | |
4124 | link_once_flags = SEC_LINK_ONCE; | |
7fa3d080 | 4125 | |
7fa3d080 BW |
4126 | return (link_once_flags != 0); |
4127 | } | |
4128 | ||
4129 | ||
4130 | static void | |
4131 | xtensa_add_literal_sym (symbolS *sym) | |
4132 | { | |
4133 | sym_list *l; | |
4134 | ||
325801bd | 4135 | l = XNEW (sym_list); |
7fa3d080 BW |
4136 | l->sym = sym; |
4137 | l->next = literal_syms; | |
4138 | literal_syms = l; | |
4139 | } | |
4140 | ||
4141 | ||
4142 | static symbolS * | |
4143 | xtensa_create_literal_symbol (segT sec, fragS *frag) | |
4144 | { | |
4145 | static int lit_num = 0; | |
4146 | static char name[256]; | |
4147 | symbolS *symbolP; | |
4148 | ||
4149 | sprintf (name, ".L_lit_sym%d", lit_num); | |
4150 | ||
4151 | /* Create a local symbol. If it is in a linkonce section, we have to | |
4152 | be careful to make sure that if it is used in a relocation that the | |
4153 | symbol will be in the output file. */ | |
4154 | if (get_is_linkonce_section (stdoutput, sec)) | |
4155 | { | |
4156 | symbolP = symbol_new (name, sec, 0, frag); | |
4157 | S_CLEAR_EXTERNAL (symbolP); | |
4158 | /* symbolP->local = 1; */ | |
4159 | } | |
4160 | else | |
4161 | symbolP = symbol_new (name, sec, 0, frag); | |
4162 | ||
4163 | xtensa_add_literal_sym (symbolP); | |
4164 | ||
7fa3d080 BW |
4165 | lit_num++; |
4166 | return symbolP; | |
4167 | } | |
4168 | ||
4169 | ||
e0001a05 NC |
4170 | /* Currently all literals that are generated here are 32-bit L32R targets. */ |
4171 | ||
7fa3d080 BW |
4172 | static symbolS * |
4173 | xg_assemble_literal (/* const */ TInsn *insn) | |
e0001a05 NC |
4174 | { |
4175 | emit_state state; | |
4176 | symbolS *lit_sym = NULL; | |
bbdd25a8 | 4177 | bfd_reloc_code_real_type reloc; |
1bbb5f21 | 4178 | bfd_boolean pcrel = FALSE; |
bbdd25a8 | 4179 | char *p; |
e0001a05 NC |
4180 | |
4181 | /* size = 4 for L32R. It could easily be larger when we move to | |
4182 | larger constants. Add a parameter later. */ | |
4183 | offsetT litsize = 4; | |
4184 | offsetT litalign = 2; /* 2^2 = 4 */ | |
4185 | expressionS saved_loc; | |
43cd72b9 BW |
4186 | expressionS * emit_val; |
4187 | ||
e0001a05 NC |
4188 | set_expr_symbol_offset (&saved_loc, frag_now->fr_symbol, frag_now_fix ()); |
4189 | ||
9c2799c2 NC |
4190 | gas_assert (insn->insn_type == ITYPE_LITERAL); |
4191 | gas_assert (insn->ntok == 1); /* must be only one token here */ | |
e0001a05 NC |
4192 | |
4193 | xtensa_switch_to_literal_fragment (&state); | |
4194 | ||
43cd72b9 BW |
4195 | emit_val = &insn->tok[0]; |
4196 | if (emit_val->X_op == O_big) | |
4197 | { | |
4198 | int size = emit_val->X_add_number * CHARS_PER_LITTLENUM; | |
4199 | if (size > litsize) | |
4200 | { | |
4201 | /* This happens when someone writes a "movi a2, big_number". */ | |
c138bc38 | 4202 | as_bad_where (frag_now->fr_file, frag_now->fr_line, |
43cd72b9 BW |
4203 | _("invalid immediate")); |
4204 | xtensa_restore_emit_state (&state); | |
4205 | return NULL; | |
4206 | } | |
4207 | } | |
4208 | ||
e0001a05 NC |
4209 | /* Force a 4-byte align here. Note that this opens a new frag, so all |
4210 | literals done with this function have a frag to themselves. That's | |
4211 | important for the way text section literals work. */ | |
4212 | frag_align (litalign, 0, 0); | |
43cd72b9 | 4213 | record_alignment (now_seg, litalign); |
e0001a05 | 4214 | |
bbdd25a8 | 4215 | switch (emit_val->X_op) |
43cd72b9 | 4216 | { |
1bbb5f21 BW |
4217 | case O_pcrel: |
4218 | pcrel = TRUE; | |
4219 | /* fall through */ | |
bbdd25a8 | 4220 | case O_pltrel: |
28dbbc02 BW |
4221 | case O_tlsfunc: |
4222 | case O_tlsarg: | |
4223 | case O_tpoff: | |
4224 | case O_dtpoff: | |
bbdd25a8 | 4225 | p = frag_more (litsize); |
43cd72b9 | 4226 | xtensa_set_frag_assembly_state (frag_now); |
28dbbc02 | 4227 | reloc = map_operator_to_reloc (emit_val->X_op, TRUE); |
43cd72b9 BW |
4228 | if (emit_val->X_add_symbol) |
4229 | emit_val->X_op = O_symbol; | |
4230 | else | |
4231 | emit_val->X_op = O_constant; | |
4232 | fix_new_exp (frag_now, p - frag_now->fr_literal, | |
1bbb5f21 | 4233 | litsize, emit_val, pcrel, reloc); |
bbdd25a8 BW |
4234 | break; |
4235 | ||
4236 | default: | |
4237 | emit_expr (emit_val, litsize); | |
4238 | break; | |
43cd72b9 | 4239 | } |
e0001a05 | 4240 | |
9c2799c2 | 4241 | gas_assert (frag_now->tc_frag_data.literal_frag == NULL); |
e0001a05 NC |
4242 | frag_now->tc_frag_data.literal_frag = get_literal_pool_location (now_seg); |
4243 | frag_now->fr_symbol = xtensa_create_literal_symbol (now_seg, frag_now); | |
4244 | lit_sym = frag_now->fr_symbol; | |
e0001a05 NC |
4245 | |
4246 | /* Go back. */ | |
4247 | xtensa_restore_emit_state (&state); | |
4248 | return lit_sym; | |
4249 | } | |
4250 | ||
4251 | ||
4252 | static void | |
7fa3d080 | 4253 | xg_assemble_literal_space (/* const */ int size, int slot) |
e0001a05 NC |
4254 | { |
4255 | emit_state state; | |
43cd72b9 | 4256 | /* We might have to do something about this alignment. It only |
e0001a05 NC |
4257 | takes effect if something is placed here. */ |
4258 | offsetT litalign = 2; /* 2^2 = 4 */ | |
4259 | fragS *lit_saved_frag; | |
4260 | ||
9c2799c2 | 4261 | gas_assert (size % 4 == 0); |
e0001a05 NC |
4262 | |
4263 | xtensa_switch_to_literal_fragment (&state); | |
4264 | ||
4265 | /* Force a 4-byte align here. */ | |
4266 | frag_align (litalign, 0, 0); | |
43cd72b9 | 4267 | record_alignment (now_seg, litalign); |
e0001a05 | 4268 | |
542f8b94 | 4269 | frag_grow (size); |
e0001a05 NC |
4270 | |
4271 | lit_saved_frag = frag_now; | |
4272 | frag_now->tc_frag_data.literal_frag = get_literal_pool_location (now_seg); | |
e0001a05 | 4273 | frag_now->fr_symbol = xtensa_create_literal_symbol (now_seg, frag_now); |
43cd72b9 | 4274 | xg_finish_frag (0, RELAX_LITERAL, 0, size, FALSE); |
e0001a05 NC |
4275 | |
4276 | /* Go back. */ | |
4277 | xtensa_restore_emit_state (&state); | |
43cd72b9 | 4278 | frag_now->tc_frag_data.literal_frags[slot] = lit_saved_frag; |
e0001a05 NC |
4279 | } |
4280 | ||
4281 | ||
e0001a05 | 4282 | /* Put in a fixup record based on the opcode. |
43cd72b9 | 4283 | Return TRUE on success. */ |
e0001a05 | 4284 | |
7fa3d080 BW |
4285 | static bfd_boolean |
4286 | xg_add_opcode_fix (TInsn *tinsn, | |
4287 | int opnum, | |
4288 | xtensa_format fmt, | |
4289 | int slot, | |
91d6fa6a | 4290 | expressionS *exp, |
7fa3d080 BW |
4291 | fragS *fragP, |
4292 | offsetT offset) | |
43cd72b9 BW |
4293 | { |
4294 | xtensa_opcode opcode = tinsn->opcode; | |
4295 | bfd_reloc_code_real_type reloc; | |
4296 | reloc_howto_type *howto; | |
4297 | int fmt_length; | |
e0001a05 NC |
4298 | fixS *the_fix; |
4299 | ||
43cd72b9 BW |
4300 | reloc = BFD_RELOC_NONE; |
4301 | ||
4302 | /* First try the special cases for "alternate" relocs. */ | |
4303 | if (opcode == xtensa_l32r_opcode) | |
4304 | { | |
4305 | if (fragP->tc_frag_data.use_absolute_literals) | |
4306 | reloc = encode_alt_reloc (slot); | |
4307 | } | |
4308 | else if (opcode == xtensa_const16_opcode) | |
4309 | { | |
91d6fa6a | 4310 | if (exp->X_op == O_lo16) |
43cd72b9 BW |
4311 | { |
4312 | reloc = encode_reloc (slot); | |
91d6fa6a | 4313 | exp->X_op = O_symbol; |
43cd72b9 | 4314 | } |
91d6fa6a | 4315 | else if (exp->X_op == O_hi16) |
43cd72b9 BW |
4316 | { |
4317 | reloc = encode_alt_reloc (slot); | |
91d6fa6a | 4318 | exp->X_op = O_symbol; |
43cd72b9 BW |
4319 | } |
4320 | } | |
4321 | ||
4322 | if (opnum != get_relaxable_immed (opcode)) | |
e0001a05 | 4323 | { |
43cd72b9 | 4324 | as_bad (_("invalid relocation for operand %i of '%s'"), |
431ad2d0 | 4325 | opnum + 1, xtensa_opcode_name (xtensa_default_isa, opcode)); |
e0001a05 NC |
4326 | return FALSE; |
4327 | } | |
4328 | ||
43cd72b9 BW |
4329 | /* Handle erroneous "@h" and "@l" expressions here before they propagate |
4330 | into the symbol table where the generic portions of the assembler | |
4331 | won't know what to do with them. */ | |
91d6fa6a | 4332 | if (exp->X_op == O_lo16 || exp->X_op == O_hi16) |
43cd72b9 BW |
4333 | { |
4334 | as_bad (_("invalid expression for operand %i of '%s'"), | |
431ad2d0 | 4335 | opnum + 1, xtensa_opcode_name (xtensa_default_isa, opcode)); |
43cd72b9 BW |
4336 | return FALSE; |
4337 | } | |
4338 | ||
4339 | /* Next try the generic relocs. */ | |
4340 | if (reloc == BFD_RELOC_NONE) | |
4341 | reloc = encode_reloc (slot); | |
4342 | if (reloc == BFD_RELOC_NONE) | |
4343 | { | |
4344 | as_bad (_("invalid relocation in instruction slot %i"), slot); | |
4345 | return FALSE; | |
4346 | } | |
e0001a05 | 4347 | |
43cd72b9 | 4348 | howto = bfd_reloc_type_lookup (stdoutput, reloc); |
e0001a05 NC |
4349 | if (!howto) |
4350 | { | |
43cd72b9 | 4351 | as_bad (_("undefined symbol for opcode \"%s\""), |
e0001a05 NC |
4352 | xtensa_opcode_name (xtensa_default_isa, opcode)); |
4353 | return FALSE; | |
4354 | } | |
4355 | ||
43cd72b9 | 4356 | fmt_length = xtensa_format_length (xtensa_default_isa, fmt); |
91d6fa6a | 4357 | the_fix = fix_new_exp (fragP, offset, fmt_length, exp, |
e0001a05 | 4358 | howto->pc_relative, reloc); |
d9740523 | 4359 | the_fix->fx_no_overflow = 1; |
91d6fa6a NC |
4360 | the_fix->tc_fix_data.X_add_symbol = exp->X_add_symbol; |
4361 | the_fix->tc_fix_data.X_add_number = exp->X_add_number; | |
7fa3d080 | 4362 | the_fix->tc_fix_data.slot = slot; |
c138bc38 | 4363 | |
7fa3d080 BW |
4364 | return TRUE; |
4365 | } | |
4366 | ||
4367 | ||
4368 | static bfd_boolean | |
4369 | xg_emit_insn_to_buf (TInsn *tinsn, | |
7fa3d080 BW |
4370 | char *buf, |
4371 | fragS *fragP, | |
4372 | offsetT offset, | |
4373 | bfd_boolean build_fix) | |
4374 | { | |
4375 | static xtensa_insnbuf insnbuf = NULL; | |
4376 | bfd_boolean has_symbolic_immed = FALSE; | |
4377 | bfd_boolean ok = TRUE; | |
b2d179be | 4378 | |
7fa3d080 BW |
4379 | if (!insnbuf) |
4380 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
4381 | ||
4382 | has_symbolic_immed = tinsn_to_insnbuf (tinsn, insnbuf); | |
4383 | if (has_symbolic_immed && build_fix) | |
4384 | { | |
4385 | /* Add a fixup. */ | |
b2d179be BW |
4386 | xtensa_format fmt = xg_get_single_format (tinsn->opcode); |
4387 | int slot = xg_get_single_slot (tinsn->opcode); | |
7fa3d080 BW |
4388 | int opnum = get_relaxable_immed (tinsn->opcode); |
4389 | expressionS *exp = &tinsn->tok[opnum]; | |
43cd72b9 | 4390 | |
b2d179be | 4391 | if (!xg_add_opcode_fix (tinsn, opnum, fmt, slot, exp, fragP, offset)) |
7fa3d080 BW |
4392 | ok = FALSE; |
4393 | } | |
4394 | fragP->tc_frag_data.is_insn = TRUE; | |
d77b99c9 BW |
4395 | xtensa_insnbuf_to_chars (xtensa_default_isa, insnbuf, |
4396 | (unsigned char *) buf, 0); | |
7fa3d080 | 4397 | return ok; |
e0001a05 NC |
4398 | } |
4399 | ||
4400 | ||
7fa3d080 BW |
4401 | static void |
4402 | xg_resolve_literals (TInsn *insn, symbolS *lit_sym) | |
e0001a05 NC |
4403 | { |
4404 | symbolS *sym = get_special_literal_symbol (); | |
4405 | int i; | |
4406 | if (lit_sym == 0) | |
4407 | return; | |
9c2799c2 | 4408 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
4409 | for (i = 0; i < insn->ntok; i++) |
4410 | if (insn->tok[i].X_add_symbol == sym) | |
4411 | insn->tok[i].X_add_symbol = lit_sym; | |
4412 | ||
4413 | } | |
4414 | ||
4415 | ||
7fa3d080 BW |
4416 | static void |
4417 | xg_resolve_labels (TInsn *insn, symbolS *label_sym) | |
e0001a05 NC |
4418 | { |
4419 | symbolS *sym = get_special_label_symbol (); | |
4420 | int i; | |
e0001a05 NC |
4421 | for (i = 0; i < insn->ntok; i++) |
4422 | if (insn->tok[i].X_add_symbol == sym) | |
4423 | insn->tok[i].X_add_symbol = label_sym; | |
4424 | ||
4425 | } | |
4426 | ||
4427 | ||
43cd72b9 | 4428 | /* Return TRUE if the instruction can write to the specified |
e0001a05 NC |
4429 | integer register. */ |
4430 | ||
4431 | static bfd_boolean | |
7fa3d080 | 4432 | is_register_writer (const TInsn *insn, const char *regset, int regnum) |
e0001a05 NC |
4433 | { |
4434 | int i; | |
4435 | int num_ops; | |
4436 | xtensa_isa isa = xtensa_default_isa; | |
4437 | ||
43cd72b9 | 4438 | num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
e0001a05 NC |
4439 | |
4440 | for (i = 0; i < num_ops; i++) | |
4441 | { | |
43cd72b9 BW |
4442 | char inout; |
4443 | inout = xtensa_operand_inout (isa, insn->opcode, i); | |
4444 | if ((inout == 'o' || inout == 'm') | |
4445 | && xtensa_operand_is_register (isa, insn->opcode, i) == 1) | |
e0001a05 | 4446 | { |
43cd72b9 BW |
4447 | xtensa_regfile opnd_rf = |
4448 | xtensa_operand_regfile (isa, insn->opcode, i); | |
4449 | if (!strcmp (xtensa_regfile_shortname (isa, opnd_rf), regset)) | |
e0001a05 NC |
4450 | { |
4451 | if ((insn->tok[i].X_op == O_register) | |
4452 | && (insn->tok[i].X_add_number == regnum)) | |
4453 | return TRUE; | |
4454 | } | |
4455 | } | |
4456 | } | |
4457 | return FALSE; | |
4458 | } | |
4459 | ||
4460 | ||
4461 | static bfd_boolean | |
7fa3d080 | 4462 | is_bad_loopend_opcode (const TInsn *tinsn) |
e0001a05 NC |
4463 | { |
4464 | xtensa_opcode opcode = tinsn->opcode; | |
4465 | ||
4466 | if (opcode == XTENSA_UNDEFINED) | |
4467 | return FALSE; | |
4468 | ||
4469 | if (opcode == xtensa_call0_opcode | |
4470 | || opcode == xtensa_callx0_opcode | |
4471 | || opcode == xtensa_call4_opcode | |
4472 | || opcode == xtensa_callx4_opcode | |
4473 | || opcode == xtensa_call8_opcode | |
4474 | || opcode == xtensa_callx8_opcode | |
4475 | || opcode == xtensa_call12_opcode | |
4476 | || opcode == xtensa_callx12_opcode | |
4477 | || opcode == xtensa_isync_opcode | |
4478 | || opcode == xtensa_ret_opcode | |
4479 | || opcode == xtensa_ret_n_opcode | |
4480 | || opcode == xtensa_retw_opcode | |
4481 | || opcode == xtensa_retw_n_opcode | |
43cd72b9 BW |
4482 | || opcode == xtensa_waiti_opcode |
4483 | || opcode == xtensa_rsr_lcount_opcode) | |
e0001a05 | 4484 | return TRUE; |
c138bc38 | 4485 | |
e0001a05 NC |
4486 | return FALSE; |
4487 | } | |
4488 | ||
4489 | ||
4490 | /* Labels that begin with ".Ln" or ".LM" are unaligned. | |
4491 | This allows the debugger to add unaligned labels. | |
4492 | Also, the assembler generates stabs labels that need | |
4493 | not be aligned: FAKE_LABEL_NAME . {"F", "L", "endfunc"}. */ | |
4494 | ||
7fa3d080 BW |
4495 | static bfd_boolean |
4496 | is_unaligned_label (symbolS *sym) | |
e0001a05 NC |
4497 | { |
4498 | const char *name = S_GET_NAME (sym); | |
4499 | static size_t fake_size = 0; | |
4500 | ||
4501 | if (name | |
4502 | && name[0] == '.' | |
4503 | && name[1] == 'L' && (name[2] == 'n' || name[2] == 'M')) | |
4504 | return TRUE; | |
4505 | ||
4506 | /* FAKE_LABEL_NAME followed by "F", "L" or "endfunc" */ | |
4507 | if (fake_size == 0) | |
4508 | fake_size = strlen (FAKE_LABEL_NAME); | |
4509 | ||
43cd72b9 | 4510 | if (name |
e0001a05 NC |
4511 | && strncmp (FAKE_LABEL_NAME, name, fake_size) == 0 |
4512 | && (name[fake_size] == 'F' | |
4513 | || name[fake_size] == 'L' | |
4514 | || (name[fake_size] == 'e' | |
4515 | && strncmp ("endfunc", name+fake_size, 7) == 0))) | |
4516 | return TRUE; | |
4517 | ||
4518 | return FALSE; | |
4519 | } | |
4520 | ||
4521 | ||
7fa3d080 BW |
4522 | static fragS * |
4523 | next_non_empty_frag (const fragS *fragP) | |
e0001a05 NC |
4524 | { |
4525 | fragS *next_fragP = fragP->fr_next; | |
4526 | ||
c138bc38 | 4527 | /* Sometimes an empty will end up here due storage allocation issues. |
e0001a05 NC |
4528 | So we have to skip until we find something legit. */ |
4529 | while (next_fragP && next_fragP->fr_fix == 0) | |
4530 | next_fragP = next_fragP->fr_next; | |
4531 | ||
4532 | if (next_fragP == NULL || next_fragP->fr_fix == 0) | |
4533 | return NULL; | |
4534 | ||
4535 | return next_fragP; | |
4536 | } | |
4537 | ||
4538 | ||
43cd72b9 | 4539 | static bfd_boolean |
7fa3d080 | 4540 | next_frag_opcode_is_loop (const fragS *fragP, xtensa_opcode *opcode) |
43cd72b9 BW |
4541 | { |
4542 | xtensa_opcode out_opcode; | |
4543 | const fragS *next_fragP = next_non_empty_frag (fragP); | |
4544 | ||
4545 | if (next_fragP == NULL) | |
4546 | return FALSE; | |
4547 | ||
4548 | out_opcode = get_opcode_from_buf (next_fragP->fr_literal, 0); | |
4549 | if (xtensa_opcode_is_loop (xtensa_default_isa, out_opcode) == 1) | |
4550 | { | |
4551 | *opcode = out_opcode; | |
4552 | return TRUE; | |
4553 | } | |
4554 | return FALSE; | |
4555 | } | |
4556 | ||
4557 | ||
4558 | static int | |
7fa3d080 | 4559 | frag_format_size (const fragS *fragP) |
43cd72b9 | 4560 | { |
e0001a05 NC |
4561 | static xtensa_insnbuf insnbuf = NULL; |
4562 | xtensa_isa isa = xtensa_default_isa; | |
43cd72b9 | 4563 | xtensa_format fmt; |
c138bc38 | 4564 | int fmt_size; |
e0001a05 NC |
4565 | |
4566 | if (!insnbuf) | |
4567 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4568 | ||
43cd72b9 BW |
4569 | if (fragP == NULL) |
4570 | return XTENSA_UNDEFINED; | |
4571 | ||
d77b99c9 BW |
4572 | xtensa_insnbuf_from_chars (isa, insnbuf, |
4573 | (unsigned char *) fragP->fr_literal, 0); | |
43cd72b9 BW |
4574 | |
4575 | fmt = xtensa_format_decode (isa, insnbuf); | |
4576 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 4577 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
4578 | fmt_size = xtensa_format_length (isa, fmt); |
4579 | ||
4580 | /* If the next format won't be changing due to relaxation, just | |
4581 | return the length of the first format. */ | |
4582 | if (fragP->fr_opcode != fragP->fr_literal) | |
4583 | return fmt_size; | |
4584 | ||
c138bc38 | 4585 | /* If during relaxation we have to pull an instruction out of a |
43cd72b9 BW |
4586 | multi-slot instruction, we will return the more conservative |
4587 | number. This works because alignment on bigger instructions | |
4588 | is more restrictive than alignment on smaller instructions. | |
4589 | This is more conservative than we would like, but it happens | |
4590 | infrequently. */ | |
4591 | ||
4592 | if (xtensa_format_num_slots (xtensa_default_isa, fmt) > 1) | |
4593 | return fmt_size; | |
4594 | ||
4595 | /* If we aren't doing one of our own relaxations or it isn't | |
4596 | slot-based, then the insn size won't change. */ | |
4597 | if (fragP->fr_type != rs_machine_dependent) | |
4598 | return fmt_size; | |
4599 | if (fragP->fr_subtype != RELAX_SLOTS) | |
4600 | return fmt_size; | |
4601 | ||
4602 | /* If an instruction is about to grow, return the longer size. */ | |
4603 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP1 | |
b81bf389 BW |
4604 | || fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP2 |
4605 | || fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP3) | |
def13efb BW |
4606 | { |
4607 | /* For most frags at RELAX_IMMED_STEPX, with X > 0, the first | |
4608 | instruction in the relaxed version is of length 3. (The case | |
4609 | where we have to pull the instruction out of a FLIX bundle | |
4610 | is handled conservatively above.) However, frags with opcodes | |
4611 | that are expanding to wide branches end up having formats that | |
4612 | are not determinable by the RELAX_IMMED_STEPX enumeration, and | |
4613 | we can't tell directly what format the relaxer picked. This | |
4614 | is a wart in the design of the relaxer that should someday be | |
4615 | fixed, but would require major changes, or at least should | |
4616 | be accompanied by major changes to make use of that data. | |
4617 | ||
4618 | In any event, we can tell that we are expanding from a single-slot | |
19ef5f3d | 4619 | format to a wider one with the logic below. */ |
def13efb | 4620 | |
19ef5f3d SA |
4621 | int i; |
4622 | int relaxed_size = fmt_size + fragP->tc_frag_data.text_expansion[0]; | |
4623 | ||
4624 | for (i = 0; i < xtensa_isa_num_formats (isa); i++) | |
4625 | { | |
4626 | if (relaxed_size == xtensa_format_length (isa, i)) | |
4627 | return relaxed_size; | |
4628 | } | |
4629 | ||
4630 | return 3; | |
def13efb | 4631 | } |
c138bc38 | 4632 | |
43cd72b9 BW |
4633 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) |
4634 | return 2 + fragP->tc_frag_data.text_expansion[0]; | |
e0001a05 | 4635 | |
43cd72b9 | 4636 | return fmt_size; |
e0001a05 NC |
4637 | } |
4638 | ||
4639 | ||
7fa3d080 BW |
4640 | static int |
4641 | next_frag_format_size (const fragS *fragP) | |
e0001a05 | 4642 | { |
7fa3d080 BW |
4643 | const fragS *next_fragP = next_non_empty_frag (fragP); |
4644 | return frag_format_size (next_fragP); | |
e0001a05 NC |
4645 | } |
4646 | ||
4647 | ||
03aaa593 BW |
4648 | /* In early Xtensa Processors, for reasons that are unclear, the ISA |
4649 | required two-byte instructions to be treated as three-byte instructions | |
4650 | for loop instruction alignment. This restriction was removed beginning | |
4651 | with Xtensa LX. Now the only requirement on loop instruction alignment | |
4652 | is that the first instruction of the loop must appear at an address that | |
4653 | does not cross a fetch boundary. */ | |
4654 | ||
4655 | static int | |
4656 | get_loop_align_size (int insn_size) | |
4657 | { | |
4658 | if (insn_size == XTENSA_UNDEFINED) | |
4659 | return xtensa_fetch_width; | |
4660 | ||
4661 | if (enforce_three_byte_loop_align && insn_size == 2) | |
4662 | return 3; | |
4663 | ||
4664 | return insn_size; | |
4665 | } | |
4666 | ||
4667 | ||
e0001a05 NC |
4668 | /* If the next legit fragment is an end-of-loop marker, |
4669 | switch its state so it will instantiate a NOP. */ | |
4670 | ||
4671 | static void | |
1d19a770 | 4672 | update_next_frag_state (fragS *fragP) |
e0001a05 NC |
4673 | { |
4674 | fragS *next_fragP = fragP->fr_next; | |
43cd72b9 | 4675 | fragS *new_target = NULL; |
e0001a05 | 4676 | |
7b1cc377 | 4677 | if (align_targets) |
43cd72b9 BW |
4678 | { |
4679 | /* We are guaranteed there will be one of these... */ | |
4680 | while (!(next_fragP->fr_type == rs_machine_dependent | |
4681 | && (next_fragP->fr_subtype == RELAX_MAYBE_UNREACHABLE | |
4682 | || next_fragP->fr_subtype == RELAX_UNREACHABLE))) | |
4683 | next_fragP = next_fragP->fr_next; | |
4684 | ||
9c2799c2 | 4685 | gas_assert (next_fragP->fr_type == rs_machine_dependent |
43cd72b9 BW |
4686 | && (next_fragP->fr_subtype == RELAX_MAYBE_UNREACHABLE |
4687 | || next_fragP->fr_subtype == RELAX_UNREACHABLE)); | |
4688 | ||
4689 | /* ...and one of these. */ | |
4690 | new_target = next_fragP->fr_next; | |
4691 | while (!(new_target->fr_type == rs_machine_dependent | |
4692 | && (new_target->fr_subtype == RELAX_MAYBE_DESIRE_ALIGN | |
4693 | || new_target->fr_subtype == RELAX_DESIRE_ALIGN))) | |
4694 | new_target = new_target->fr_next; | |
4695 | ||
9c2799c2 | 4696 | gas_assert (new_target->fr_type == rs_machine_dependent |
43cd72b9 BW |
4697 | && (new_target->fr_subtype == RELAX_MAYBE_DESIRE_ALIGN |
4698 | || new_target->fr_subtype == RELAX_DESIRE_ALIGN)); | |
4699 | } | |
43cd72b9 | 4700 | |
1d19a770 | 4701 | while (next_fragP && next_fragP->fr_fix == 0) |
43cd72b9 | 4702 | { |
1d19a770 BW |
4703 | if (next_fragP->fr_type == rs_machine_dependent |
4704 | && next_fragP->fr_subtype == RELAX_LOOP_END) | |
43cd72b9 | 4705 | { |
1d19a770 BW |
4706 | next_fragP->fr_subtype = RELAX_LOOP_END_ADD_NOP; |
4707 | return; | |
e0001a05 | 4708 | } |
1d19a770 BW |
4709 | |
4710 | next_fragP = next_fragP->fr_next; | |
e0001a05 NC |
4711 | } |
4712 | } | |
4713 | ||
4714 | ||
4715 | static bfd_boolean | |
7fa3d080 | 4716 | next_frag_is_branch_target (const fragS *fragP) |
e0001a05 | 4717 | { |
43cd72b9 | 4718 | /* Sometimes an empty will end up here due to storage allocation issues, |
e0001a05 NC |
4719 | so we have to skip until we find something legit. */ |
4720 | for (fragP = fragP->fr_next; fragP; fragP = fragP->fr_next) | |
4721 | { | |
4722 | if (fragP->tc_frag_data.is_branch_target) | |
4723 | return TRUE; | |
4724 | if (fragP->fr_fix != 0) | |
4725 | break; | |
4726 | } | |
4727 | return FALSE; | |
4728 | } | |
4729 | ||
4730 | ||
4731 | static bfd_boolean | |
7fa3d080 | 4732 | next_frag_is_loop_target (const fragS *fragP) |
e0001a05 | 4733 | { |
c138bc38 | 4734 | /* Sometimes an empty will end up here due storage allocation issues. |
e0001a05 NC |
4735 | So we have to skip until we find something legit. */ |
4736 | for (fragP = fragP->fr_next; fragP; fragP = fragP->fr_next) | |
4737 | { | |
4738 | if (fragP->tc_frag_data.is_loop_target) | |
4739 | return TRUE; | |
4740 | if (fragP->fr_fix != 0) | |
4741 | break; | |
4742 | } | |
4743 | return FALSE; | |
4744 | } | |
4745 | ||
4746 | ||
3a1e9c4a SA |
4747 | /* As specified in the relaxation table, when a loop instruction is |
4748 | relaxed, there are 24 bytes between the loop instruction itself and | |
4749 | the first instruction in the loop. */ | |
4750 | ||
4751 | #define RELAXED_LOOP_INSN_BYTES 24 | |
4752 | ||
e0001a05 | 4753 | static addressT |
7fa3d080 | 4754 | next_frag_pre_opcode_bytes (const fragS *fragp) |
e0001a05 NC |
4755 | { |
4756 | const fragS *next_fragp = fragp->fr_next; | |
43cd72b9 | 4757 | xtensa_opcode next_opcode; |
e0001a05 | 4758 | |
43cd72b9 | 4759 | if (!next_frag_opcode_is_loop (fragp, &next_opcode)) |
e0001a05 NC |
4760 | return 0; |
4761 | ||
43cd72b9 BW |
4762 | /* Sometimes an empty will end up here due to storage allocation issues, |
4763 | so we have to skip until we find something legit. */ | |
e0001a05 NC |
4764 | while (next_fragp->fr_fix == 0) |
4765 | next_fragp = next_fragp->fr_next; | |
4766 | ||
4767 | if (next_fragp->fr_type != rs_machine_dependent) | |
4768 | return 0; | |
4769 | ||
4770 | /* There is some implicit knowledge encoded in here. | |
4771 | The LOOP instructions that are NOT RELAX_IMMED have | |
43cd72b9 BW |
4772 | been relaxed. Note that we can assume that the LOOP |
4773 | instruction is in slot 0 because loops aren't bundleable. */ | |
4774 | if (next_fragp->tc_frag_data.slot_subtypes[0] > RELAX_IMMED) | |
3a1e9c4a | 4775 | return get_expanded_loop_offset (next_opcode) + RELAXED_LOOP_INSN_BYTES; |
e0001a05 NC |
4776 | |
4777 | return 0; | |
4778 | } | |
4779 | ||
4780 | ||
4781 | /* Mark a location where we can later insert literal frags. Update | |
4782 | the section's literal_pool_loc, so subsequent literals can be | |
4783 | placed nearest to their use. */ | |
4784 | ||
4785 | static void | |
7fa3d080 | 4786 | xtensa_mark_literal_pool_location (void) |
e0001a05 NC |
4787 | { |
4788 | /* Any labels pointing to the current location need | |
4789 | to be adjusted to after the literal pool. */ | |
e0001a05 | 4790 | fragS *pool_location; |
e0001a05 | 4791 | |
1f2a7e38 | 4792 | if (use_literal_section) |
43cd72b9 BW |
4793 | return; |
4794 | ||
dd49a749 BW |
4795 | /* We stash info in these frags so we can later move the literal's |
4796 | fixes into this frchain's fix list. */ | |
e0001a05 | 4797 | pool_location = frag_now; |
dd49a749 | 4798 | frag_now->tc_frag_data.lit_frchain = frchain_now; |
c48aaca0 | 4799 | frag_now->tc_frag_data.literal_frag = frag_now; |
b46824bd MF |
4800 | /* Just record this frag. */ |
4801 | xtensa_maybe_create_literal_pool_frag (FALSE, FALSE); | |
dd49a749 | 4802 | frag_variant (rs_machine_dependent, 0, 0, |
e0001a05 | 4803 | RELAX_LITERAL_POOL_BEGIN, NULL, 0, NULL); |
43cd72b9 | 4804 | xtensa_set_frag_assembly_state (frag_now); |
dd49a749 BW |
4805 | frag_now->tc_frag_data.lit_seg = now_seg; |
4806 | frag_variant (rs_machine_dependent, 0, 0, | |
e0001a05 | 4807 | RELAX_LITERAL_POOL_END, NULL, 0, NULL); |
43cd72b9 | 4808 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 4809 | |
e0001a05 | 4810 | set_literal_pool_location (now_seg, pool_location); |
e0001a05 NC |
4811 | } |
4812 | ||
4813 | ||
43cd72b9 BW |
4814 | /* Build a nop of the correct size into tinsn. */ |
4815 | ||
4816 | static void | |
7fa3d080 | 4817 | build_nop (TInsn *tinsn, int size) |
43cd72b9 BW |
4818 | { |
4819 | tinsn_init (tinsn); | |
4820 | switch (size) | |
4821 | { | |
4822 | case 2: | |
4823 | tinsn->opcode = xtensa_nop_n_opcode; | |
4824 | tinsn->ntok = 0; | |
4825 | if (tinsn->opcode == XTENSA_UNDEFINED) | |
4826 | as_fatal (_("opcode 'NOP.N' unavailable in this configuration")); | |
4827 | break; | |
4828 | ||
4829 | case 3: | |
4830 | if (xtensa_nop_opcode == XTENSA_UNDEFINED) | |
4831 | { | |
4832 | tinsn->opcode = xtensa_or_opcode; | |
4833 | set_expr_const (&tinsn->tok[0], 1); | |
4834 | set_expr_const (&tinsn->tok[1], 1); | |
4835 | set_expr_const (&tinsn->tok[2], 1); | |
4836 | tinsn->ntok = 3; | |
4837 | } | |
4838 | else | |
4839 | tinsn->opcode = xtensa_nop_opcode; | |
4840 | ||
9c2799c2 | 4841 | gas_assert (tinsn->opcode != XTENSA_UNDEFINED); |
43cd72b9 BW |
4842 | } |
4843 | } | |
4844 | ||
4845 | ||
e0001a05 NC |
4846 | /* Assemble a NOP of the requested size in the buffer. User must have |
4847 | allocated "buf" with at least "size" bytes. */ | |
4848 | ||
7fa3d080 | 4849 | static void |
d77b99c9 | 4850 | assemble_nop (int size, char *buf) |
e0001a05 NC |
4851 | { |
4852 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 4853 | TInsn tinsn; |
e0001a05 | 4854 | |
43cd72b9 | 4855 | build_nop (&tinsn, size); |
e0001a05 | 4856 | |
43cd72b9 BW |
4857 | if (!insnbuf) |
4858 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
e0001a05 | 4859 | |
43cd72b9 | 4860 | tinsn_to_insnbuf (&tinsn, insnbuf); |
d77b99c9 BW |
4861 | xtensa_insnbuf_to_chars (xtensa_default_isa, insnbuf, |
4862 | (unsigned char *) buf, 0); | |
e0001a05 NC |
4863 | } |
4864 | ||
4865 | ||
4866 | /* Return the number of bytes for the offset of the expanded loop | |
4867 | instruction. This should be incorporated into the relaxation | |
4868 | specification but is hard-coded here. This is used to auto-align | |
4869 | the loop instruction. It is invalid to call this function if the | |
4870 | configuration does not have loops or if the opcode is not a loop | |
4871 | opcode. */ | |
4872 | ||
4873 | static addressT | |
7fa3d080 | 4874 | get_expanded_loop_offset (xtensa_opcode opcode) |
e0001a05 NC |
4875 | { |
4876 | /* This is the OFFSET of the loop instruction in the expanded loop. | |
4877 | This MUST correspond directly to the specification of the loop | |
4878 | expansion. It will be validated on fragment conversion. */ | |
9c2799c2 | 4879 | gas_assert (opcode != XTENSA_UNDEFINED); |
e0001a05 NC |
4880 | if (opcode == xtensa_loop_opcode) |
4881 | return 0; | |
4882 | if (opcode == xtensa_loopnez_opcode) | |
4883 | return 3; | |
4884 | if (opcode == xtensa_loopgtz_opcode) | |
4885 | return 6; | |
4886 | as_fatal (_("get_expanded_loop_offset: invalid opcode")); | |
4887 | return 0; | |
4888 | } | |
4889 | ||
4890 | ||
7fa3d080 BW |
4891 | static fragS * |
4892 | get_literal_pool_location (segT seg) | |
e0001a05 | 4893 | { |
f8aecf3c | 4894 | if (auto_litpools) |
b46824bd | 4895 | { |
f8aecf3c MF |
4896 | struct litpool_seg *lps = litpool_seg_list.next; |
4897 | struct litpool_frag *lpf; | |
4898 | for ( ; lps && lps->seg->id != seg->id; lps = lps->next) | |
4899 | ; | |
4900 | if (lps) | |
b46824bd | 4901 | { |
f8aecf3c MF |
4902 | for (lpf = lps->frag_list.prev; lpf->fragP; lpf = lpf->prev) |
4903 | { /* Skip "candidates" for now. */ | |
4904 | if (lpf->fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN && | |
4905 | lpf->priority == 1) | |
4906 | return lpf->fragP; | |
4907 | } | |
4908 | /* Must convert a lower-priority pool. */ | |
4909 | for (lpf = lps->frag_list.prev; lpf->fragP; lpf = lpf->prev) | |
4910 | { | |
4911 | if (lpf->fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN) | |
4912 | return lpf->fragP; | |
4913 | } | |
4914 | /* Still no match -- try for a low priority pool. */ | |
4915 | for (lpf = lps->frag_list.prev; lpf->fragP; lpf = lpf->prev) | |
4916 | { | |
4917 | if (lpf->fragP->fr_subtype == RELAX_LITERAL_POOL_CANDIDATE_BEGIN) | |
4918 | return lpf->fragP; | |
4919 | } | |
b46824bd MF |
4920 | } |
4921 | } | |
e0001a05 NC |
4922 | return seg_info (seg)->tc_segment_info_data.literal_pool_loc; |
4923 | } | |
4924 | ||
4925 | ||
4926 | static void | |
7fa3d080 | 4927 | set_literal_pool_location (segT seg, fragS *literal_pool_loc) |
e0001a05 NC |
4928 | { |
4929 | seg_info (seg)->tc_segment_info_data.literal_pool_loc = literal_pool_loc; | |
4930 | } | |
4931 | ||
43cd72b9 BW |
4932 | |
4933 | /* Set frag assembly state should be called when a new frag is | |
4934 | opened and after a frag has been closed. */ | |
4935 | ||
7fa3d080 BW |
4936 | static void |
4937 | xtensa_set_frag_assembly_state (fragS *fragP) | |
43cd72b9 BW |
4938 | { |
4939 | if (!density_supported) | |
4940 | fragP->tc_frag_data.is_no_density = TRUE; | |
4941 | ||
4942 | /* This function is called from subsegs_finish, which is called | |
c138bc38 | 4943 | after xtensa_end, so we can't use "use_transform" or |
43cd72b9 BW |
4944 | "use_schedule" here. */ |
4945 | if (!directive_state[directive_transform]) | |
4946 | fragP->tc_frag_data.is_no_transform = TRUE; | |
7c834684 BW |
4947 | if (directive_state[directive_longcalls]) |
4948 | fragP->tc_frag_data.use_longcalls = TRUE; | |
43cd72b9 BW |
4949 | fragP->tc_frag_data.use_absolute_literals = |
4950 | directive_state[directive_absolute_literals]; | |
4951 | fragP->tc_frag_data.is_assembly_state_set = TRUE; | |
4952 | } | |
4953 | ||
4954 | ||
7fa3d080 BW |
4955 | static bfd_boolean |
4956 | relaxable_section (asection *sec) | |
43cd72b9 | 4957 | { |
11ac2671 BW |
4958 | return ((sec->flags & SEC_DEBUGGING) == 0 |
4959 | && strcmp (sec->name, ".eh_frame") != 0); | |
43cd72b9 BW |
4960 | } |
4961 | ||
4962 | ||
99ded152 BW |
4963 | static void |
4964 | xtensa_mark_frags_for_org (void) | |
4965 | { | |
4966 | segT *seclist; | |
4967 | ||
4968 | /* Walk over each fragment of all of the current segments. If we find | |
4969 | a .org frag in any of the segments, mark all frags prior to it as | |
4970 | "no transform", which will prevent linker optimizations from messing | |
4971 | up the .org distance. This should be done after | |
4972 | xtensa_find_unmarked_state_frags, because we don't want to worry here | |
4973 | about that function trashing the data we save here. */ | |
4974 | ||
4975 | for (seclist = &stdoutput->sections; | |
4976 | seclist && *seclist; | |
4977 | seclist = &(*seclist)->next) | |
4978 | { | |
4979 | segT sec = *seclist; | |
4980 | segment_info_type *seginfo; | |
4981 | fragS *fragP; | |
4982 | flagword flags; | |
fd361982 | 4983 | flags = bfd_section_flags (sec); |
99ded152 BW |
4984 | if (flags & SEC_DEBUGGING) |
4985 | continue; | |
4986 | if (!(flags & SEC_ALLOC)) | |
4987 | continue; | |
4988 | ||
4989 | seginfo = seg_info (sec); | |
4990 | if (seginfo && seginfo->frchainP) | |
4991 | { | |
4992 | fragS *last_fragP = seginfo->frchainP->frch_root; | |
4993 | for (fragP = seginfo->frchainP->frch_root; fragP; | |
4994 | fragP = fragP->fr_next) | |
4995 | { | |
4996 | /* cvt_frag_to_fill has changed the fr_type of org frags to | |
4997 | rs_fill, so use the value as cached in rs_subtype here. */ | |
4998 | if (fragP->fr_subtype == RELAX_ORG) | |
4999 | { | |
5000 | while (last_fragP != fragP->fr_next) | |
5001 | { | |
5002 | last_fragP->tc_frag_data.is_no_transform = TRUE; | |
5003 | last_fragP = last_fragP->fr_next; | |
5004 | } | |
5005 | } | |
5006 | } | |
5007 | } | |
5008 | } | |
5009 | } | |
5010 | ||
5011 | ||
43cd72b9 | 5012 | static void |
7fa3d080 | 5013 | xtensa_find_unmarked_state_frags (void) |
43cd72b9 BW |
5014 | { |
5015 | segT *seclist; | |
5016 | ||
5017 | /* Walk over each fragment of all of the current segments. For each | |
5018 | unmarked fragment, mark it with the same info as the previous | |
5019 | fragment. */ | |
5020 | for (seclist = &stdoutput->sections; | |
5021 | seclist && *seclist; | |
5022 | seclist = &(*seclist)->next) | |
5023 | { | |
5024 | segT sec = *seclist; | |
5025 | segment_info_type *seginfo; | |
5026 | fragS *fragP; | |
5027 | flagword flags; | |
fd361982 | 5028 | flags = bfd_section_flags (sec); |
43cd72b9 BW |
5029 | if (flags & SEC_DEBUGGING) |
5030 | continue; | |
5031 | if (!(flags & SEC_ALLOC)) | |
5032 | continue; | |
5033 | ||
5034 | seginfo = seg_info (sec); | |
5035 | if (seginfo && seginfo->frchainP) | |
5036 | { | |
5037 | fragS *last_fragP = 0; | |
5038 | for (fragP = seginfo->frchainP->frch_root; fragP; | |
5039 | fragP = fragP->fr_next) | |
5040 | { | |
5041 | if (fragP->fr_fix != 0 | |
5042 | && !fragP->tc_frag_data.is_assembly_state_set) | |
5043 | { | |
5044 | if (last_fragP == 0) | |
5045 | { | |
5046 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
5047 | _("assembly state not set for first frag in section %s"), | |
5048 | sec->name); | |
5049 | } | |
5050 | else | |
5051 | { | |
5052 | fragP->tc_frag_data.is_assembly_state_set = TRUE; | |
5053 | fragP->tc_frag_data.is_no_density = | |
5054 | last_fragP->tc_frag_data.is_no_density; | |
5055 | fragP->tc_frag_data.is_no_transform = | |
5056 | last_fragP->tc_frag_data.is_no_transform; | |
7c834684 BW |
5057 | fragP->tc_frag_data.use_longcalls = |
5058 | last_fragP->tc_frag_data.use_longcalls; | |
43cd72b9 BW |
5059 | fragP->tc_frag_data.use_absolute_literals = |
5060 | last_fragP->tc_frag_data.use_absolute_literals; | |
5061 | } | |
5062 | } | |
5063 | if (fragP->tc_frag_data.is_assembly_state_set) | |
5064 | last_fragP = fragP; | |
5065 | } | |
5066 | } | |
5067 | } | |
5068 | } | |
5069 | ||
5070 | ||
5071 | static void | |
7fa3d080 BW |
5072 | xtensa_find_unaligned_branch_targets (bfd *abfd ATTRIBUTE_UNUSED, |
5073 | asection *sec, | |
5074 | void *unused ATTRIBUTE_UNUSED) | |
43cd72b9 | 5075 | { |
fd361982 | 5076 | flagword flags = bfd_section_flags (sec); |
43cd72b9 BW |
5077 | segment_info_type *seginfo = seg_info (sec); |
5078 | fragS *frag = seginfo->frchainP->frch_root; | |
c138bc38 | 5079 | |
43cd72b9 | 5080 | if (flags & SEC_CODE) |
c138bc38 | 5081 | { |
43cd72b9 BW |
5082 | xtensa_isa isa = xtensa_default_isa; |
5083 | xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc (isa); | |
5084 | while (frag != NULL) | |
5085 | { | |
5086 | if (frag->tc_frag_data.is_branch_target) | |
5087 | { | |
5088 | int op_size; | |
664df4e4 | 5089 | addressT branch_align, frag_addr; |
43cd72b9 BW |
5090 | xtensa_format fmt; |
5091 | ||
d77b99c9 BW |
5092 | xtensa_insnbuf_from_chars |
5093 | (isa, insnbuf, (unsigned char *) frag->fr_literal, 0); | |
43cd72b9 BW |
5094 | fmt = xtensa_format_decode (isa, insnbuf); |
5095 | op_size = xtensa_format_length (isa, fmt); | |
664df4e4 BW |
5096 | branch_align = 1 << branch_align_power (sec); |
5097 | frag_addr = frag->fr_address % branch_align; | |
5098 | if (frag_addr + op_size > branch_align) | |
43cd72b9 BW |
5099 | as_warn_where (frag->fr_file, frag->fr_line, |
5100 | _("unaligned branch target: %d bytes at 0x%lx"), | |
dd49a749 | 5101 | op_size, (long) frag->fr_address); |
43cd72b9 BW |
5102 | } |
5103 | frag = frag->fr_next; | |
5104 | } | |
5105 | xtensa_insnbuf_free (isa, insnbuf); | |
5106 | } | |
5107 | } | |
5108 | ||
5109 | ||
5110 | static void | |
7fa3d080 BW |
5111 | xtensa_find_unaligned_loops (bfd *abfd ATTRIBUTE_UNUSED, |
5112 | asection *sec, | |
5113 | void *unused ATTRIBUTE_UNUSED) | |
43cd72b9 | 5114 | { |
fd361982 | 5115 | flagword flags = bfd_section_flags (sec); |
43cd72b9 BW |
5116 | segment_info_type *seginfo = seg_info (sec); |
5117 | fragS *frag = seginfo->frchainP->frch_root; | |
5118 | xtensa_isa isa = xtensa_default_isa; | |
c138bc38 | 5119 | |
43cd72b9 | 5120 | if (flags & SEC_CODE) |
c138bc38 | 5121 | { |
43cd72b9 BW |
5122 | xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc (isa); |
5123 | while (frag != NULL) | |
5124 | { | |
5125 | if (frag->tc_frag_data.is_first_loop_insn) | |
5126 | { | |
5127 | int op_size; | |
d77b99c9 | 5128 | addressT frag_addr; |
43cd72b9 BW |
5129 | xtensa_format fmt; |
5130 | ||
3c83b96e SA |
5131 | if (frag->fr_fix == 0) |
5132 | frag = next_non_empty_frag (frag); | |
3739860c | 5133 | |
3c83b96e SA |
5134 | if (frag) |
5135 | { | |
5136 | xtensa_insnbuf_from_chars | |
5137 | (isa, insnbuf, (unsigned char *) frag->fr_literal, 0); | |
5138 | fmt = xtensa_format_decode (isa, insnbuf); | |
5139 | op_size = xtensa_format_length (isa, fmt); | |
5140 | frag_addr = frag->fr_address % xtensa_fetch_width; | |
3739860c | 5141 | |
3c83b96e SA |
5142 | if (frag_addr + op_size > xtensa_fetch_width) |
5143 | as_warn_where (frag->fr_file, frag->fr_line, | |
5144 | _("unaligned loop: %d bytes at 0x%lx"), | |
5145 | op_size, (long) frag->fr_address); | |
5146 | } | |
43cd72b9 BW |
5147 | } |
5148 | frag = frag->fr_next; | |
5149 | } | |
5150 | xtensa_insnbuf_free (isa, insnbuf); | |
5151 | } | |
5152 | } | |
5153 | ||
5154 | ||
30f725a1 BW |
5155 | static int |
5156 | xg_apply_fix_value (fixS *fixP, valueT val) | |
43cd72b9 BW |
5157 | { |
5158 | xtensa_isa isa = xtensa_default_isa; | |
5159 | static xtensa_insnbuf insnbuf = NULL; | |
5160 | static xtensa_insnbuf slotbuf = NULL; | |
5161 | xtensa_format fmt; | |
5162 | int slot; | |
5163 | bfd_boolean alt_reloc; | |
5164 | xtensa_opcode opcode; | |
5165 | char *const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; | |
5166 | ||
1b6e95c2 BW |
5167 | if (decode_reloc (fixP->fx_r_type, &slot, &alt_reloc) |
5168 | || alt_reloc) | |
43cd72b9 BW |
5169 | as_fatal (_("unexpected fix")); |
5170 | ||
5171 | if (!insnbuf) | |
5172 | { | |
5173 | insnbuf = xtensa_insnbuf_alloc (isa); | |
5174 | slotbuf = xtensa_insnbuf_alloc (isa); | |
5175 | } | |
5176 | ||
d77b99c9 | 5177 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) fixpos, 0); |
43cd72b9 BW |
5178 | fmt = xtensa_format_decode (isa, insnbuf); |
5179 | if (fmt == XTENSA_UNDEFINED) | |
5180 | as_fatal (_("undecodable fix")); | |
5181 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
5182 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
5183 | if (opcode == XTENSA_UNDEFINED) | |
5184 | as_fatal (_("undecodable fix")); | |
5185 | ||
5186 | /* CONST16 immediates are not PC-relative, despite the fact that we | |
5187 | reuse the normal PC-relative operand relocations for the low part | |
30f725a1 | 5188 | of a CONST16 operand. */ |
43cd72b9 | 5189 | if (opcode == xtensa_const16_opcode) |
30f725a1 | 5190 | return 0; |
43cd72b9 BW |
5191 | |
5192 | xtensa_insnbuf_set_operand (slotbuf, fmt, slot, opcode, | |
5193 | get_relaxable_immed (opcode), val, | |
5194 | fixP->fx_file, fixP->fx_line); | |
5195 | ||
5196 | xtensa_format_set_slot (isa, fmt, slot, insnbuf, slotbuf); | |
d77b99c9 | 5197 | xtensa_insnbuf_to_chars (isa, insnbuf, (unsigned char *) fixpos, 0); |
30f725a1 BW |
5198 | |
5199 | return 1; | |
43cd72b9 BW |
5200 | } |
5201 | ||
e0001a05 NC |
5202 | \f |
5203 | /* External Functions and Other GAS Hooks. */ | |
5204 | ||
5205 | const char * | |
7fa3d080 | 5206 | xtensa_target_format (void) |
e0001a05 NC |
5207 | { |
5208 | return (target_big_endian ? "elf32-xtensa-be" : "elf32-xtensa-le"); | |
5209 | } | |
5210 | ||
5211 | ||
5212 | void | |
7fa3d080 | 5213 | xtensa_file_arch_init (bfd *abfd) |
e0001a05 NC |
5214 | { |
5215 | bfd_set_private_flags (abfd, 0x100 | 0x200); | |
5216 | } | |
5217 | ||
5218 | ||
5219 | void | |
7fa3d080 | 5220 | md_number_to_chars (char *buf, valueT val, int n) |
e0001a05 NC |
5221 | { |
5222 | if (target_big_endian) | |
5223 | number_to_chars_bigendian (buf, val, n); | |
5224 | else | |
5225 | number_to_chars_littleendian (buf, val, n); | |
5226 | } | |
5227 | ||
f7e16c2a MF |
5228 | static void |
5229 | xg_init_global_config (void) | |
5230 | { | |
5231 | target_big_endian = XCHAL_HAVE_BE; | |
5232 | ||
5233 | density_supported = XCHAL_HAVE_DENSITY; | |
5234 | absolute_literals_supported = XSHAL_USE_ABSOLUTE_LITERALS; | |
5235 | xtensa_fetch_width = XCHAL_INST_FETCH_WIDTH; | |
5236 | ||
5237 | directive_state[directive_density] = XCHAL_HAVE_DENSITY; | |
5238 | directive_state[directive_absolute_literals] = XSHAL_USE_ABSOLUTE_LITERALS; | |
5239 | } | |
5240 | ||
5241 | void | |
5242 | xtensa_init (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) | |
5243 | { | |
5244 | xg_init_global_config (); | |
5245 | } | |
e0001a05 NC |
5246 | |
5247 | /* This function is called once, at assembler startup time. It should | |
5248 | set up all the tables, etc. that the MD part of the assembler will | |
5249 | need. */ | |
5250 | ||
5251 | void | |
7fa3d080 | 5252 | md_begin (void) |
e0001a05 NC |
5253 | { |
5254 | segT current_section = now_seg; | |
5255 | int current_subsec = now_subseg; | |
5256 | xtensa_isa isa; | |
62af60e2 | 5257 | int i; |
e0001a05 | 5258 | |
43cd72b9 | 5259 | xtensa_default_isa = xtensa_isa_init (0, 0); |
e0001a05 | 5260 | isa = xtensa_default_isa; |
e0001a05 | 5261 | |
9632a526 | 5262 | linkrelax = opt_linkrelax; |
43cd72b9 | 5263 | |
74869ac7 | 5264 | /* Set up the literal sections. */ |
e0001a05 | 5265 | memset (&default_lit_sections, 0, sizeof (default_lit_sections)); |
e0001a05 NC |
5266 | |
5267 | subseg_set (current_section, current_subsec); | |
5268 | ||
5269 | xtensa_addi_opcode = xtensa_opcode_lookup (isa, "addi"); | |
5270 | xtensa_addmi_opcode = xtensa_opcode_lookup (isa, "addmi"); | |
5271 | xtensa_call0_opcode = xtensa_opcode_lookup (isa, "call0"); | |
5272 | xtensa_call4_opcode = xtensa_opcode_lookup (isa, "call4"); | |
5273 | xtensa_call8_opcode = xtensa_opcode_lookup (isa, "call8"); | |
5274 | xtensa_call12_opcode = xtensa_opcode_lookup (isa, "call12"); | |
5275 | xtensa_callx0_opcode = xtensa_opcode_lookup (isa, "callx0"); | |
5276 | xtensa_callx4_opcode = xtensa_opcode_lookup (isa, "callx4"); | |
5277 | xtensa_callx8_opcode = xtensa_opcode_lookup (isa, "callx8"); | |
5278 | xtensa_callx12_opcode = xtensa_opcode_lookup (isa, "callx12"); | |
43cd72b9 | 5279 | xtensa_const16_opcode = xtensa_opcode_lookup (isa, "const16"); |
e0001a05 | 5280 | xtensa_entry_opcode = xtensa_opcode_lookup (isa, "entry"); |
d12f9798 | 5281 | xtensa_extui_opcode = xtensa_opcode_lookup (isa, "extui"); |
43cd72b9 BW |
5282 | xtensa_movi_opcode = xtensa_opcode_lookup (isa, "movi"); |
5283 | xtensa_movi_n_opcode = xtensa_opcode_lookup (isa, "movi.n"); | |
e0001a05 | 5284 | xtensa_isync_opcode = xtensa_opcode_lookup (isa, "isync"); |
19e8f41a | 5285 | xtensa_j_opcode = xtensa_opcode_lookup (isa, "j"); |
e0001a05 | 5286 | xtensa_jx_opcode = xtensa_opcode_lookup (isa, "jx"); |
43cd72b9 | 5287 | xtensa_l32r_opcode = xtensa_opcode_lookup (isa, "l32r"); |
e0001a05 NC |
5288 | xtensa_loop_opcode = xtensa_opcode_lookup (isa, "loop"); |
5289 | xtensa_loopnez_opcode = xtensa_opcode_lookup (isa, "loopnez"); | |
5290 | xtensa_loopgtz_opcode = xtensa_opcode_lookup (isa, "loopgtz"); | |
43cd72b9 | 5291 | xtensa_nop_opcode = xtensa_opcode_lookup (isa, "nop"); |
e0001a05 NC |
5292 | xtensa_nop_n_opcode = xtensa_opcode_lookup (isa, "nop.n"); |
5293 | xtensa_or_opcode = xtensa_opcode_lookup (isa, "or"); | |
5294 | xtensa_ret_opcode = xtensa_opcode_lookup (isa, "ret"); | |
5295 | xtensa_ret_n_opcode = xtensa_opcode_lookup (isa, "ret.n"); | |
5296 | xtensa_retw_opcode = xtensa_opcode_lookup (isa, "retw"); | |
5297 | xtensa_retw_n_opcode = xtensa_opcode_lookup (isa, "retw.n"); | |
43cd72b9 | 5298 | xtensa_rsr_lcount_opcode = xtensa_opcode_lookup (isa, "rsr.lcount"); |
e0001a05 | 5299 | xtensa_waiti_opcode = xtensa_opcode_lookup (isa, "waiti"); |
43cd72b9 | 5300 | |
3739860c | 5301 | for (i = 0; i < xtensa_isa_num_formats (isa); i++) |
62af60e2 SA |
5302 | { |
5303 | int format_slots = xtensa_format_num_slots (isa, i); | |
5304 | if (format_slots > config_max_slots) | |
5305 | config_max_slots = format_slots; | |
5306 | } | |
5307 | ||
5308 | xg_init_vinsn (&cur_vinsn); | |
5309 | ||
77cba8a3 BW |
5310 | xtensa_num_pipe_stages = xtensa_isa_num_pipe_stages (isa); |
5311 | ||
43cd72b9 BW |
5312 | init_op_placement_info_table (); |
5313 | ||
5314 | /* Set up the assembly state. */ | |
5315 | if (!frag_now->tc_frag_data.is_assembly_state_set) | |
5316 | xtensa_set_frag_assembly_state (frag_now); | |
54879176 MF |
5317 | |
5318 | if (!use_literal_section) | |
5319 | xtensa_mark_literal_pool_location (); | |
43cd72b9 BW |
5320 | } |
5321 | ||
5322 | ||
5323 | /* TC_INIT_FIX_DATA hook */ | |
5324 | ||
5325 | void | |
7fa3d080 | 5326 | xtensa_init_fix_data (fixS *x) |
43cd72b9 BW |
5327 | { |
5328 | x->tc_fix_data.slot = 0; | |
5329 | x->tc_fix_data.X_add_symbol = NULL; | |
5330 | x->tc_fix_data.X_add_number = 0; | |
e0001a05 NC |
5331 | } |
5332 | ||
5333 | ||
5334 | /* tc_frob_label hook */ | |
5335 | ||
5336 | void | |
7fa3d080 | 5337 | xtensa_frob_label (symbolS *sym) |
e0001a05 | 5338 | { |
3ea38ac2 BW |
5339 | float freq; |
5340 | ||
5341 | if (cur_vinsn.inside_bundle) | |
5342 | { | |
5343 | as_bad (_("labels are not valid inside bundles")); | |
5344 | return; | |
5345 | } | |
5346 | ||
5347 | freq = get_subseg_target_freq (now_seg, now_subseg); | |
7b1cc377 | 5348 | |
43cd72b9 BW |
5349 | /* Since the label was already attached to a frag associated with the |
5350 | previous basic block, it now needs to be reset to the current frag. */ | |
5351 | symbol_set_frag (sym, frag_now); | |
5352 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
5353 | ||
82e7541d BW |
5354 | if (generating_literals) |
5355 | xtensa_add_literal_sym (sym); | |
5356 | else | |
5357 | xtensa_add_insn_label (sym); | |
5358 | ||
7b1cc377 BW |
5359 | if (symbol_get_tc (sym)->is_loop_target) |
5360 | { | |
5361 | if ((get_last_insn_flags (now_seg, now_subseg) | |
e0001a05 | 5362 | & FLAG_IS_BAD_LOOPEND) != 0) |
7b1cc377 BW |
5363 | as_bad (_("invalid last instruction for a zero-overhead loop")); |
5364 | ||
5365 | xtensa_set_frag_assembly_state (frag_now); | |
5366 | frag_var (rs_machine_dependent, 4, 4, RELAX_LOOP_END, | |
5367 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
5368 | ||
5369 | xtensa_set_frag_assembly_state (frag_now); | |
c3ea6048 | 5370 | xtensa_move_labels (frag_now, 0); |
07a53e5c | 5371 | } |
e0001a05 NC |
5372 | |
5373 | /* No target aligning in the absolute section. */ | |
61846f28 | 5374 | if (now_seg != absolute_section |
61846f28 | 5375 | && !is_unaligned_label (sym) |
43cd72b9 BW |
5376 | && !generating_literals) |
5377 | { | |
43cd72b9 BW |
5378 | xtensa_set_frag_assembly_state (frag_now); |
5379 | ||
b7afdeef SA |
5380 | if (do_align_targets ()) |
5381 | frag_var (rs_machine_dependent, 0, (int) freq, | |
5382 | RELAX_DESIRE_ALIGN_IF_TARGET, frag_now->fr_symbol, | |
5383 | frag_now->fr_offset, NULL); | |
5384 | else | |
5385 | frag_var (rs_fill, 0, 0, frag_now->fr_subtype, | |
5386 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
43cd72b9 | 5387 | xtensa_set_frag_assembly_state (frag_now); |
c3ea6048 | 5388 | xtensa_move_labels (frag_now, 0); |
43cd72b9 BW |
5389 | } |
5390 | ||
5391 | /* We need to mark the following properties even if we aren't aligning. */ | |
5392 | ||
5393 | /* If the label is already known to be a branch target, i.e., a | |
5394 | forward branch, mark the frag accordingly. Backward branches | |
5395 | are handled by xg_add_branch_and_loop_targets. */ | |
5396 | if (symbol_get_tc (sym)->is_branch_target) | |
5397 | symbol_get_frag (sym)->tc_frag_data.is_branch_target = TRUE; | |
5398 | ||
5399 | /* Loops only go forward, so they can be identified here. */ | |
5400 | if (symbol_get_tc (sym)->is_loop_target) | |
5401 | symbol_get_frag (sym)->tc_frag_data.is_loop_target = TRUE; | |
07a53e5c RH |
5402 | |
5403 | dwarf2_emit_label (sym); | |
43cd72b9 BW |
5404 | } |
5405 | ||
5406 | ||
5407 | /* tc_unrecognized_line hook */ | |
5408 | ||
5409 | int | |
7fa3d080 | 5410 | xtensa_unrecognized_line (int ch) |
43cd72b9 BW |
5411 | { |
5412 | switch (ch) | |
5413 | { | |
5414 | case '{' : | |
5415 | if (cur_vinsn.inside_bundle == 0) | |
5416 | { | |
5417 | /* PR8110: Cannot emit line number info inside a FLIX bundle | |
5418 | when using --gstabs. Temporarily disable debug info. */ | |
5419 | generate_lineno_debug (); | |
5420 | if (debug_type == DEBUG_STABS) | |
5421 | { | |
5422 | xt_saved_debug_type = debug_type; | |
5423 | debug_type = DEBUG_NONE; | |
5424 | } | |
82e7541d | 5425 | |
43cd72b9 BW |
5426 | cur_vinsn.inside_bundle = 1; |
5427 | } | |
5428 | else | |
5429 | { | |
5430 | as_bad (_("extra opening brace")); | |
5431 | return 0; | |
5432 | } | |
5433 | break; | |
82e7541d | 5434 | |
43cd72b9 BW |
5435 | case '}' : |
5436 | if (cur_vinsn.inside_bundle) | |
5437 | finish_vinsn (&cur_vinsn); | |
5438 | else | |
5439 | { | |
5440 | as_bad (_("extra closing brace")); | |
5441 | return 0; | |
5442 | } | |
5443 | break; | |
5444 | default: | |
5445 | as_bad (_("syntax error")); | |
5446 | return 0; | |
e0001a05 | 5447 | } |
43cd72b9 | 5448 | return 1; |
e0001a05 NC |
5449 | } |
5450 | ||
5451 | ||
5452 | /* md_flush_pending_output hook */ | |
5453 | ||
5454 | void | |
7fa3d080 | 5455 | xtensa_flush_pending_output (void) |
e0001a05 | 5456 | { |
a3582eee BW |
5457 | /* This line fixes a bug where automatically generated gstabs info |
5458 | separates a function label from its entry instruction, ending up | |
5459 | with the literal position between the function label and the entry | |
5460 | instruction and crashing code. It only happens with --gstabs and | |
5461 | --text-section-literals, and when several other obscure relaxation | |
5462 | conditions are met. */ | |
5463 | if (outputting_stabs_line_debug) | |
5464 | return; | |
5465 | ||
43cd72b9 BW |
5466 | if (cur_vinsn.inside_bundle) |
5467 | as_bad (_("missing closing brace")); | |
5468 | ||
e0001a05 NC |
5469 | /* If there is a non-zero instruction fragment, close it. */ |
5470 | if (frag_now_fix () != 0 && frag_now->tc_frag_data.is_insn) | |
5471 | { | |
5472 | frag_wane (frag_now); | |
5473 | frag_new (0); | |
43cd72b9 | 5474 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
5475 | } |
5476 | frag_now->tc_frag_data.is_insn = FALSE; | |
82e7541d BW |
5477 | |
5478 | xtensa_clear_insn_labels (); | |
e0001a05 NC |
5479 | } |
5480 | ||
5481 | ||
43cd72b9 BW |
5482 | /* We had an error while parsing an instruction. The string might look |
5483 | like this: "insn arg1, arg2 }". If so, we need to see the closing | |
5484 | brace and reset some fields. Otherwise, the vinsn never gets closed | |
5485 | and the num_slots field will grow past the end of the array of slots, | |
5486 | and bad things happen. */ | |
5487 | ||
5488 | static void | |
7fa3d080 | 5489 | error_reset_cur_vinsn (void) |
43cd72b9 BW |
5490 | { |
5491 | if (cur_vinsn.inside_bundle) | |
5492 | { | |
5493 | if (*input_line_pointer == '}' | |
5494 | || *(input_line_pointer - 1) == '}' | |
5495 | || *(input_line_pointer - 2) == '}') | |
5496 | xg_clear_vinsn (&cur_vinsn); | |
5497 | } | |
5498 | } | |
5499 | ||
5500 | ||
e0001a05 | 5501 | void |
7fa3d080 | 5502 | md_assemble (char *str) |
e0001a05 NC |
5503 | { |
5504 | xtensa_isa isa = xtensa_default_isa; | |
b224e962 | 5505 | char *opname; |
e0001a05 NC |
5506 | unsigned opnamelen; |
5507 | bfd_boolean has_underbar = FALSE; | |
43cd72b9 | 5508 | char *arg_strings[MAX_INSN_ARGS]; |
e0001a05 | 5509 | int num_args; |
e0001a05 | 5510 | TInsn orig_insn; /* Original instruction from the input. */ |
e0001a05 | 5511 | |
e0001a05 NC |
5512 | tinsn_init (&orig_insn); |
5513 | ||
5514 | /* Split off the opcode. */ | |
5515 | opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_/0123456789."); | |
4ec9d7d5 | 5516 | opname = xstrndup (str, opnamelen); |
e0001a05 NC |
5517 | |
5518 | num_args = tokenize_arguments (arg_strings, str + opnamelen); | |
5519 | if (num_args == -1) | |
5520 | { | |
5521 | as_bad (_("syntax error")); | |
5522 | return; | |
5523 | } | |
5524 | ||
5525 | if (xg_translate_idioms (&opname, &num_args, arg_strings)) | |
5526 | return; | |
5527 | ||
5528 | /* Check for an underbar prefix. */ | |
5529 | if (*opname == '_') | |
5530 | { | |
5531 | has_underbar = TRUE; | |
5532 | opname += 1; | |
5533 | } | |
5534 | ||
5535 | orig_insn.insn_type = ITYPE_INSN; | |
5536 | orig_insn.ntok = 0; | |
43cd72b9 | 5537 | orig_insn.is_specific_opcode = (has_underbar || !use_transform ()); |
e0001a05 | 5538 | orig_insn.opcode = xtensa_opcode_lookup (isa, opname); |
28dbbc02 | 5539 | |
2b0f3761 | 5540 | /* Special case: Check for "CALLXn.TLS" pseudo op. If found, grab its |
28dbbc02 BW |
5541 | extra argument and set the opcode to "CALLXn". */ |
5542 | if (orig_insn.opcode == XTENSA_UNDEFINED | |
5543 | && strncasecmp (opname, "callx", 5) == 0) | |
5544 | { | |
5545 | unsigned long window_size; | |
5546 | char *suffix; | |
5547 | ||
5548 | window_size = strtoul (opname + 5, &suffix, 10); | |
5549 | if (suffix != opname + 5 | |
5550 | && (window_size == 0 | |
5551 | || window_size == 4 | |
5552 | || window_size == 8 | |
5553 | || window_size == 12) | |
5554 | && strcasecmp (suffix, ".tls") == 0) | |
5555 | { | |
5556 | switch (window_size) | |
5557 | { | |
5558 | case 0: orig_insn.opcode = xtensa_callx0_opcode; break; | |
5559 | case 4: orig_insn.opcode = xtensa_callx4_opcode; break; | |
5560 | case 8: orig_insn.opcode = xtensa_callx8_opcode; break; | |
5561 | case 12: orig_insn.opcode = xtensa_callx12_opcode; break; | |
5562 | } | |
5563 | ||
5564 | if (num_args != 2) | |
5565 | as_bad (_("wrong number of operands for '%s'"), opname); | |
5566 | else | |
5567 | { | |
5568 | bfd_reloc_code_real_type reloc; | |
5569 | char *old_input_line_pointer; | |
19e8f41a | 5570 | expressionS *tok = &orig_insn.extra_arg; |
28dbbc02 BW |
5571 | |
5572 | old_input_line_pointer = input_line_pointer; | |
5573 | input_line_pointer = arg_strings[num_args - 1]; | |
5574 | ||
87975d2a | 5575 | expression (tok); |
28dbbc02 BW |
5576 | if (tok->X_op == O_symbol |
5577 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, tok)) | |
5578 | == BFD_RELOC_XTENSA_TLS_CALL)) | |
5579 | tok->X_op = map_suffix_reloc_to_operator (reloc); | |
5580 | else | |
5581 | as_bad (_("bad relocation expression for '%s'"), opname); | |
5582 | ||
5583 | input_line_pointer = old_input_line_pointer; | |
5584 | num_args -= 1; | |
5585 | } | |
5586 | } | |
5587 | } | |
5588 | ||
2b0f3761 | 5589 | /* Special case: Check for "j.l" pseudo op. */ |
19e8f41a BW |
5590 | if (orig_insn.opcode == XTENSA_UNDEFINED |
5591 | && strncasecmp (opname, "j.l", 3) == 0) | |
5592 | { | |
5593 | if (num_args != 2) | |
5594 | as_bad (_("wrong number of operands for '%s'"), opname); | |
5595 | else | |
5596 | { | |
5597 | char *old_input_line_pointer; | |
5598 | expressionS *tok = &orig_insn.extra_arg; | |
5599 | ||
5600 | old_input_line_pointer = input_line_pointer; | |
5601 | input_line_pointer = arg_strings[num_args - 1]; | |
5602 | ||
5603 | expression_maybe_register (xtensa_jx_opcode, 0, tok); | |
5604 | input_line_pointer = old_input_line_pointer; | |
5605 | ||
5606 | num_args -= 1; | |
5607 | orig_insn.opcode = xtensa_j_opcode; | |
5608 | } | |
5609 | } | |
5610 | ||
e0001a05 NC |
5611 | if (orig_insn.opcode == XTENSA_UNDEFINED) |
5612 | { | |
43cd72b9 BW |
5613 | xtensa_format fmt = xtensa_format_lookup (isa, opname); |
5614 | if (fmt == XTENSA_UNDEFINED) | |
5615 | { | |
5616 | as_bad (_("unknown opcode or format name '%s'"), opname); | |
5617 | error_reset_cur_vinsn (); | |
5618 | return; | |
5619 | } | |
5620 | if (!cur_vinsn.inside_bundle) | |
5621 | { | |
5622 | as_bad (_("format names only valid inside bundles")); | |
5623 | error_reset_cur_vinsn (); | |
5624 | return; | |
5625 | } | |
5626 | if (cur_vinsn.format != XTENSA_UNDEFINED) | |
5627 | as_warn (_("multiple formats specified for one bundle; using '%s'"), | |
5628 | opname); | |
5629 | cur_vinsn.format = fmt; | |
5630 | free (has_underbar ? opname - 1 : opname); | |
5631 | error_reset_cur_vinsn (); | |
e0001a05 NC |
5632 | return; |
5633 | } | |
5634 | ||
e0001a05 NC |
5635 | /* Parse the arguments. */ |
5636 | if (parse_arguments (&orig_insn, num_args, arg_strings)) | |
5637 | { | |
5638 | as_bad (_("syntax error")); | |
43cd72b9 | 5639 | error_reset_cur_vinsn (); |
e0001a05 NC |
5640 | return; |
5641 | } | |
5642 | ||
5643 | /* Free the opcode and argument strings, now that they've been parsed. */ | |
5644 | free (has_underbar ? opname - 1 : opname); | |
5645 | opname = 0; | |
5646 | while (num_args-- > 0) | |
5647 | free (arg_strings[num_args]); | |
5648 | ||
43cd72b9 BW |
5649 | /* Get expressions for invisible operands. */ |
5650 | if (get_invisible_operands (&orig_insn)) | |
5651 | { | |
5652 | error_reset_cur_vinsn (); | |
5653 | return; | |
5654 | } | |
5655 | ||
e0001a05 NC |
5656 | /* Check for the right number and type of arguments. */ |
5657 | if (tinsn_check_arguments (&orig_insn)) | |
e0001a05 | 5658 | { |
43cd72b9 BW |
5659 | error_reset_cur_vinsn (); |
5660 | return; | |
e0001a05 NC |
5661 | } |
5662 | ||
b224e962 BW |
5663 | /* Record the line number for each TInsn, because a FLIX bundle may be |
5664 | spread across multiple input lines and individual instructions may be | |
5665 | moved around in some cases. */ | |
5666 | orig_insn.loc_directive_seen = dwarf2_loc_directive_seen; | |
5667 | dwarf2_where (&orig_insn.debug_line); | |
5668 | dwarf2_consume_line_info (); | |
c138bc38 | 5669 | |
43cd72b9 BW |
5670 | xg_add_branch_and_loop_targets (&orig_insn); |
5671 | ||
431ad2d0 BW |
5672 | /* Check that immediate value for ENTRY is >= 16. */ |
5673 | if (orig_insn.opcode == xtensa_entry_opcode && orig_insn.ntok >= 3) | |
e0001a05 | 5674 | { |
431ad2d0 BW |
5675 | expressionS *exp = &orig_insn.tok[2]; |
5676 | if (exp->X_op == O_constant && exp->X_add_number < 16) | |
5677 | as_warn (_("entry instruction with stack decrement < 16")); | |
e0001a05 NC |
5678 | } |
5679 | ||
e0001a05 | 5680 | /* Finish it off: |
43cd72b9 BW |
5681 | assemble_tokens (opcode, tok, ntok); |
5682 | expand the tokens from the orig_insn into the | |
5683 | stack of instructions that will not expand | |
e0001a05 | 5684 | unless required at relaxation time. */ |
e0001a05 | 5685 | |
43cd72b9 BW |
5686 | if (!cur_vinsn.inside_bundle) |
5687 | emit_single_op (&orig_insn); | |
5688 | else /* We are inside a bundle. */ | |
e0001a05 | 5689 | { |
43cd72b9 BW |
5690 | cur_vinsn.slots[cur_vinsn.num_slots] = orig_insn; |
5691 | cur_vinsn.num_slots++; | |
5692 | if (*input_line_pointer == '}' | |
5693 | || *(input_line_pointer - 1) == '}' | |
5694 | || *(input_line_pointer - 2) == '}') | |
5695 | finish_vinsn (&cur_vinsn); | |
e0001a05 NC |
5696 | } |
5697 | ||
43cd72b9 BW |
5698 | /* We've just emitted a new instruction so clear the list of labels. */ |
5699 | xtensa_clear_insn_labels (); | |
a82c7d90 DW |
5700 | |
5701 | xtensa_check_frag_count (); | |
e0001a05 NC |
5702 | } |
5703 | ||
5704 | ||
43cd72b9 | 5705 | /* HANDLE_ALIGN hook */ |
e0001a05 | 5706 | |
43cd72b9 BW |
5707 | /* For a .align directive, we mark the previous block with the alignment |
5708 | information. This will be placed in the object file in the | |
5709 | property section corresponding to this section. */ | |
e0001a05 | 5710 | |
43cd72b9 | 5711 | void |
7fa3d080 | 5712 | xtensa_handle_align (fragS *fragP) |
43cd72b9 BW |
5713 | { |
5714 | if (linkrelax | |
b08b5071 | 5715 | && ! fragP->tc_frag_data.is_literal |
43cd72b9 BW |
5716 | && (fragP->fr_type == rs_align |
5717 | || fragP->fr_type == rs_align_code) | |
43cd72b9 BW |
5718 | && fragP->fr_offset > 0 |
5719 | && now_seg != bss_section) | |
e0001a05 | 5720 | { |
43cd72b9 BW |
5721 | fragP->tc_frag_data.is_align = TRUE; |
5722 | fragP->tc_frag_data.alignment = fragP->fr_offset; | |
e0001a05 NC |
5723 | } |
5724 | ||
43cd72b9 | 5725 | if (fragP->fr_type == rs_align_test) |
e0001a05 | 5726 | { |
43cd72b9 BW |
5727 | int count; |
5728 | count = fragP->fr_next->fr_address - fragP->fr_address - fragP->fr_fix; | |
5729 | if (count != 0) | |
c138bc38 | 5730 | as_bad_where (fragP->fr_file, fragP->fr_line, |
43cd72b9 | 5731 | _("unaligned entry instruction")); |
e0001a05 | 5732 | } |
99ded152 BW |
5733 | |
5734 | if (linkrelax && fragP->fr_type == rs_org) | |
5735 | fragP->fr_subtype = RELAX_ORG; | |
e0001a05 | 5736 | } |
43cd72b9 | 5737 | |
e0001a05 NC |
5738 | |
5739 | /* TC_FRAG_INIT hook */ | |
5740 | ||
5741 | void | |
7fa3d080 | 5742 | xtensa_frag_init (fragS *frag) |
e0001a05 | 5743 | { |
43cd72b9 | 5744 | xtensa_set_frag_assembly_state (frag); |
e0001a05 NC |
5745 | } |
5746 | ||
5747 | ||
5748 | symbolS * | |
7fa3d080 | 5749 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
e0001a05 NC |
5750 | { |
5751 | return NULL; | |
5752 | } | |
5753 | ||
5754 | ||
5755 | /* Round up a section size to the appropriate boundary. */ | |
5756 | ||
5757 | valueT | |
7fa3d080 | 5758 | md_section_align (segT segment ATTRIBUTE_UNUSED, valueT size) |
e0001a05 NC |
5759 | { |
5760 | return size; /* Byte alignment is fine. */ | |
5761 | } | |
5762 | ||
5763 | ||
5764 | long | |
7fa3d080 | 5765 | md_pcrel_from (fixS *fixP) |
e0001a05 NC |
5766 | { |
5767 | char *insn_p; | |
5768 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 5769 | static xtensa_insnbuf slotbuf = NULL; |
e0001a05 | 5770 | int opnum; |
43cd72b9 | 5771 | uint32 opnd_value; |
e0001a05 | 5772 | xtensa_opcode opcode; |
43cd72b9 BW |
5773 | xtensa_format fmt; |
5774 | int slot; | |
e0001a05 NC |
5775 | xtensa_isa isa = xtensa_default_isa; |
5776 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; | |
43cd72b9 | 5777 | bfd_boolean alt_reloc; |
e0001a05 | 5778 | |
e0001a05 | 5779 | if (fixP->fx_r_type == BFD_RELOC_XTENSA_ASM_EXPAND) |
30f725a1 | 5780 | return 0; |
e0001a05 | 5781 | |
1bbb5f21 BW |
5782 | if (fixP->fx_r_type == BFD_RELOC_32_PCREL) |
5783 | return addr; | |
5784 | ||
e0001a05 | 5785 | if (!insnbuf) |
43cd72b9 BW |
5786 | { |
5787 | insnbuf = xtensa_insnbuf_alloc (isa); | |
5788 | slotbuf = xtensa_insnbuf_alloc (isa); | |
5789 | } | |
e0001a05 NC |
5790 | |
5791 | insn_p = &fixP->fx_frag->fr_literal[fixP->fx_where]; | |
d77b99c9 | 5792 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) insn_p, 0); |
43cd72b9 BW |
5793 | fmt = xtensa_format_decode (isa, insnbuf); |
5794 | ||
5795 | if (fmt == XTENSA_UNDEFINED) | |
5796 | as_fatal (_("bad instruction format")); | |
5797 | ||
5798 | if (decode_reloc (fixP->fx_r_type, &slot, &alt_reloc) != 0) | |
5799 | as_fatal (_("invalid relocation")); | |
5800 | ||
5801 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
5802 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
5803 | ||
30f725a1 BW |
5804 | /* Check for "alternate" relocations (operand not specified). None |
5805 | of the current uses for these are really PC-relative. */ | |
43cd72b9 BW |
5806 | if (alt_reloc || opcode == xtensa_const16_opcode) |
5807 | { | |
5808 | if (opcode != xtensa_l32r_opcode | |
5809 | && opcode != xtensa_const16_opcode) | |
5810 | as_fatal (_("invalid relocation for '%s' instruction"), | |
5811 | xtensa_opcode_name (isa, opcode)); | |
30f725a1 | 5812 | return 0; |
e0001a05 NC |
5813 | } |
5814 | ||
43cd72b9 BW |
5815 | opnum = get_relaxable_immed (opcode); |
5816 | opnd_value = 0; | |
5817 | if (xtensa_operand_is_PCrelative (isa, opcode, opnum) != 1 | |
5818 | || xtensa_operand_do_reloc (isa, opcode, opnum, &opnd_value, addr)) | |
e0001a05 NC |
5819 | { |
5820 | as_bad_where (fixP->fx_file, | |
5821 | fixP->fx_line, | |
5822 | _("invalid relocation for operand %d of '%s'"), | |
5823 | opnum, xtensa_opcode_name (isa, opcode)); | |
30f725a1 | 5824 | return 0; |
e0001a05 | 5825 | } |
43cd72b9 BW |
5826 | return 0 - opnd_value; |
5827 | } | |
5828 | ||
5829 | ||
5830 | /* TC_FORCE_RELOCATION hook */ | |
5831 | ||
5832 | int | |
7fa3d080 | 5833 | xtensa_force_relocation (fixS *fix) |
43cd72b9 BW |
5834 | { |
5835 | switch (fix->fx_r_type) | |
30f725a1 BW |
5836 | { |
5837 | case BFD_RELOC_XTENSA_ASM_EXPAND: | |
43cd72b9 BW |
5838 | case BFD_RELOC_XTENSA_SLOT0_ALT: |
5839 | case BFD_RELOC_XTENSA_SLOT1_ALT: | |
5840 | case BFD_RELOC_XTENSA_SLOT2_ALT: | |
5841 | case BFD_RELOC_XTENSA_SLOT3_ALT: | |
5842 | case BFD_RELOC_XTENSA_SLOT4_ALT: | |
5843 | case BFD_RELOC_XTENSA_SLOT5_ALT: | |
5844 | case BFD_RELOC_XTENSA_SLOT6_ALT: | |
5845 | case BFD_RELOC_XTENSA_SLOT7_ALT: | |
5846 | case BFD_RELOC_XTENSA_SLOT8_ALT: | |
5847 | case BFD_RELOC_XTENSA_SLOT9_ALT: | |
5848 | case BFD_RELOC_XTENSA_SLOT10_ALT: | |
5849 | case BFD_RELOC_XTENSA_SLOT11_ALT: | |
5850 | case BFD_RELOC_XTENSA_SLOT12_ALT: | |
5851 | case BFD_RELOC_XTENSA_SLOT13_ALT: | |
5852 | case BFD_RELOC_XTENSA_SLOT14_ALT: | |
43cd72b9 BW |
5853 | return 1; |
5854 | default: | |
5855 | break; | |
e0001a05 NC |
5856 | } |
5857 | ||
43cd72b9 BW |
5858 | if (linkrelax && fix->fx_addsy |
5859 | && relaxable_section (S_GET_SEGMENT (fix->fx_addsy))) | |
5860 | return 1; | |
5861 | ||
5862 | return generic_force_reloc (fix); | |
5863 | } | |
5864 | ||
5865 | ||
30f725a1 BW |
5866 | /* TC_VALIDATE_FIX_SUB hook */ |
5867 | ||
5868 | int | |
5869 | xtensa_validate_fix_sub (fixS *fix) | |
5870 | { | |
5871 | segT add_symbol_segment, sub_symbol_segment; | |
5872 | ||
5873 | /* The difference of two symbols should be resolved by the assembler when | |
5874 | linkrelax is not set. If the linker may relax the section containing | |
5875 | the symbols, then an Xtensa DIFF relocation must be generated so that | |
5876 | the linker knows to adjust the difference value. */ | |
5877 | if (!linkrelax || fix->fx_addsy == NULL) | |
5878 | return 0; | |
5879 | ||
5880 | /* Make sure both symbols are in the same segment, and that segment is | |
5881 | "normal" and relaxable. If the segment is not "normal", then the | |
5882 | fix is not valid. If the segment is not "relaxable", then the fix | |
5883 | should have been handled earlier. */ | |
5884 | add_symbol_segment = S_GET_SEGMENT (fix->fx_addsy); | |
5885 | if (! SEG_NORMAL (add_symbol_segment) || | |
5886 | ! relaxable_section (add_symbol_segment)) | |
5887 | return 0; | |
5888 | sub_symbol_segment = S_GET_SEGMENT (fix->fx_subsy); | |
5889 | return (sub_symbol_segment == add_symbol_segment); | |
5890 | } | |
5891 | ||
5892 | ||
43cd72b9 BW |
5893 | /* NO_PSEUDO_DOT hook */ |
5894 | ||
5895 | /* This function has nothing to do with pseudo dots, but this is the | |
5896 | nearest macro to where the check needs to take place. FIXME: This | |
5897 | seems wrong. */ | |
5898 | ||
5899 | bfd_boolean | |
7fa3d080 | 5900 | xtensa_check_inside_bundle (void) |
43cd72b9 BW |
5901 | { |
5902 | if (cur_vinsn.inside_bundle && input_line_pointer[-1] == '.') | |
5903 | as_bad (_("directives are not valid inside bundles")); | |
5904 | ||
5905 | /* This function must always return FALSE because it is called via a | |
5906 | macro that has nothing to do with bundling. */ | |
5907 | return FALSE; | |
e0001a05 NC |
5908 | } |
5909 | ||
5910 | ||
43cd72b9 | 5911 | /* md_elf_section_change_hook */ |
e0001a05 NC |
5912 | |
5913 | void | |
7fa3d080 | 5914 | xtensa_elf_section_change_hook (void) |
e0001a05 | 5915 | { |
43cd72b9 BW |
5916 | /* Set up the assembly state. */ |
5917 | if (!frag_now->tc_frag_data.is_assembly_state_set) | |
5918 | xtensa_set_frag_assembly_state (frag_now); | |
54879176 MF |
5919 | |
5920 | if (!use_literal_section | |
5921 | && seg_info (now_seg)->tc_segment_info_data.literal_pool_loc == NULL | |
5922 | && !xtensa_is_init_fini (now_seg)) | |
5923 | xtensa_mark_literal_pool_location (); | |
e0001a05 NC |
5924 | } |
5925 | ||
5926 | ||
5927 | /* tc_fix_adjustable hook */ | |
5928 | ||
5929 | bfd_boolean | |
7fa3d080 | 5930 | xtensa_fix_adjustable (fixS *fixP) |
e0001a05 NC |
5931 | { |
5932 | /* We need the symbol name for the VTABLE entries. */ | |
5933 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
5934 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
5935 | return 0; | |
5936 | ||
5937 | return 1; | |
5938 | } | |
5939 | ||
5940 | ||
6a7eedfe BW |
5941 | /* tc_symbol_new_hook */ |
5942 | ||
5943 | symbolS *expr_symbols = NULL; | |
5944 | ||
3739860c | 5945 | void |
6a7eedfe BW |
5946 | xtensa_symbol_new_hook (symbolS *sym) |
5947 | { | |
fb227da0 | 5948 | if (is_leb128_expr && S_GET_SEGMENT (sym) == expr_section) |
6a7eedfe BW |
5949 | { |
5950 | symbol_get_tc (sym)->next_expr_symbol = expr_symbols; | |
5951 | expr_symbols = sym; | |
5952 | } | |
5953 | } | |
5954 | ||
5955 | ||
e0001a05 | 5956 | void |
55cf6793 | 5957 | md_apply_fix (fixS *fixP, valueT *valP, segT seg) |
e0001a05 | 5958 | { |
30f725a1 | 5959 | char *const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; |
d47d412e | 5960 | valueT val = 0; |
30f725a1 | 5961 | |
e7da6241 BW |
5962 | /* Subtracted symbols are only allowed for a few relocation types, and |
5963 | unless linkrelax is enabled, they should not make it to this point. */ | |
5964 | if (fixP->fx_subsy && !(linkrelax && (fixP->fx_r_type == BFD_RELOC_32 | |
5965 | || fixP->fx_r_type == BFD_RELOC_16 | |
5966 | || fixP->fx_r_type == BFD_RELOC_8))) | |
5967 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
5968 | ||
30f725a1 | 5969 | switch (fixP->fx_r_type) |
e0001a05 | 5970 | { |
1bbb5f21 | 5971 | case BFD_RELOC_32_PCREL: |
30f725a1 BW |
5972 | case BFD_RELOC_32: |
5973 | case BFD_RELOC_16: | |
5974 | case BFD_RELOC_8: | |
e7da6241 | 5975 | if (fixP->fx_subsy) |
30f725a1 BW |
5976 | { |
5977 | switch (fixP->fx_r_type) | |
5978 | { | |
5979 | case BFD_RELOC_8: | |
5980 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF8; | |
ea173078 | 5981 | fixP->fx_signed = 0; |
30f725a1 BW |
5982 | break; |
5983 | case BFD_RELOC_16: | |
5984 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF16; | |
ea173078 | 5985 | fixP->fx_signed = 0; |
30f725a1 BW |
5986 | break; |
5987 | case BFD_RELOC_32: | |
5988 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF32; | |
ea173078 | 5989 | fixP->fx_signed = 0; |
30f725a1 BW |
5990 | break; |
5991 | default: | |
5992 | break; | |
5993 | } | |
e0001a05 | 5994 | |
30f725a1 BW |
5995 | val = (S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset |
5996 | - S_GET_VALUE (fixP->fx_subsy)); | |
5997 | ||
5998 | /* The difference value gets written out, and the DIFF reloc | |
5999 | identifies the address of the subtracted symbol (i.e., the one | |
6000 | with the lowest address). */ | |
6001 | *valP = val; | |
6002 | fixP->fx_offset -= val; | |
6003 | fixP->fx_subsy = NULL; | |
6004 | } | |
6005 | else if (! fixP->fx_addsy) | |
e0001a05 | 6006 | { |
30f725a1 | 6007 | val = *valP; |
e0001a05 | 6008 | fixP->fx_done = 1; |
30f725a1 | 6009 | } |
75c1c971 MF |
6010 | else if (S_GET_SEGMENT (fixP->fx_addsy) == absolute_section) |
6011 | { | |
6012 | val = S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset; | |
6013 | *valP = val; | |
6014 | fixP->fx_done = 1; | |
6015 | } | |
d47d412e BW |
6016 | /* fall through */ |
6017 | ||
6018 | case BFD_RELOC_XTENSA_PLT: | |
30f725a1 BW |
6019 | md_number_to_chars (fixpos, val, fixP->fx_size); |
6020 | fixP->fx_no_overflow = 0; /* Use the standard overflow check. */ | |
6021 | break; | |
e0001a05 | 6022 | |
28dbbc02 BW |
6023 | case BFD_RELOC_XTENSA_TLSDESC_FN: |
6024 | case BFD_RELOC_XTENSA_TLSDESC_ARG: | |
6025 | case BFD_RELOC_XTENSA_TLS_TPOFF: | |
6026 | case BFD_RELOC_XTENSA_TLS_DTPOFF: | |
6027 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
6028 | md_number_to_chars (fixpos, 0, fixP->fx_size); | |
6029 | fixP->fx_no_overflow = 0; /* Use the standard overflow check. */ | |
6030 | break; | |
6031 | ||
30f725a1 BW |
6032 | case BFD_RELOC_XTENSA_SLOT0_OP: |
6033 | case BFD_RELOC_XTENSA_SLOT1_OP: | |
6034 | case BFD_RELOC_XTENSA_SLOT2_OP: | |
6035 | case BFD_RELOC_XTENSA_SLOT3_OP: | |
6036 | case BFD_RELOC_XTENSA_SLOT4_OP: | |
6037 | case BFD_RELOC_XTENSA_SLOT5_OP: | |
6038 | case BFD_RELOC_XTENSA_SLOT6_OP: | |
6039 | case BFD_RELOC_XTENSA_SLOT7_OP: | |
6040 | case BFD_RELOC_XTENSA_SLOT8_OP: | |
6041 | case BFD_RELOC_XTENSA_SLOT9_OP: | |
6042 | case BFD_RELOC_XTENSA_SLOT10_OP: | |
6043 | case BFD_RELOC_XTENSA_SLOT11_OP: | |
6044 | case BFD_RELOC_XTENSA_SLOT12_OP: | |
6045 | case BFD_RELOC_XTENSA_SLOT13_OP: | |
6046 | case BFD_RELOC_XTENSA_SLOT14_OP: | |
6047 | if (linkrelax) | |
6048 | { | |
6049 | /* Write the tentative value of a PC-relative relocation to a | |
6050 | local symbol into the instruction. The value will be ignored | |
6051 | by the linker, and it makes the object file disassembly | |
6052 | readable when all branch targets are encoded in relocations. */ | |
6053 | ||
9c2799c2 | 6054 | gas_assert (fixP->fx_addsy); |
20ee54e8 | 6055 | if (S_GET_SEGMENT (fixP->fx_addsy) == seg |
30f725a1 BW |
6056 | && !S_FORCE_RELOC (fixP->fx_addsy, 1)) |
6057 | { | |
6058 | val = (S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset | |
6059 | - md_pcrel_from (fixP)); | |
6060 | (void) xg_apply_fix_value (fixP, val); | |
6061 | } | |
6062 | } | |
6063 | else if (! fixP->fx_addsy) | |
6064 | { | |
6065 | val = *valP; | |
6066 | if (xg_apply_fix_value (fixP, val)) | |
6067 | fixP->fx_done = 1; | |
6068 | } | |
6069 | break; | |
e0001a05 | 6070 | |
30f725a1 | 6071 | case BFD_RELOC_XTENSA_ASM_EXPAND: |
28dbbc02 BW |
6072 | case BFD_RELOC_XTENSA_TLS_FUNC: |
6073 | case BFD_RELOC_XTENSA_TLS_ARG: | |
6074 | case BFD_RELOC_XTENSA_TLS_CALL: | |
30f725a1 BW |
6075 | case BFD_RELOC_XTENSA_SLOT0_ALT: |
6076 | case BFD_RELOC_XTENSA_SLOT1_ALT: | |
6077 | case BFD_RELOC_XTENSA_SLOT2_ALT: | |
6078 | case BFD_RELOC_XTENSA_SLOT3_ALT: | |
6079 | case BFD_RELOC_XTENSA_SLOT4_ALT: | |
6080 | case BFD_RELOC_XTENSA_SLOT5_ALT: | |
6081 | case BFD_RELOC_XTENSA_SLOT6_ALT: | |
6082 | case BFD_RELOC_XTENSA_SLOT7_ALT: | |
6083 | case BFD_RELOC_XTENSA_SLOT8_ALT: | |
6084 | case BFD_RELOC_XTENSA_SLOT9_ALT: | |
6085 | case BFD_RELOC_XTENSA_SLOT10_ALT: | |
6086 | case BFD_RELOC_XTENSA_SLOT11_ALT: | |
6087 | case BFD_RELOC_XTENSA_SLOT12_ALT: | |
6088 | case BFD_RELOC_XTENSA_SLOT13_ALT: | |
6089 | case BFD_RELOC_XTENSA_SLOT14_ALT: | |
6090 | /* These all need to be resolved at link-time. Do nothing now. */ | |
6091 | break; | |
e0001a05 | 6092 | |
30f725a1 BW |
6093 | case BFD_RELOC_VTABLE_INHERIT: |
6094 | case BFD_RELOC_VTABLE_ENTRY: | |
6095 | fixP->fx_done = 0; | |
6096 | break; | |
e0001a05 | 6097 | |
30f725a1 BW |
6098 | default: |
6099 | as_bad (_("unhandled local relocation fix %s"), | |
6100 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
e0001a05 NC |
6101 | } |
6102 | } | |
6103 | ||
6104 | ||
6d4af3c2 | 6105 | const char * |
7fa3d080 | 6106 | md_atof (int type, char *litP, int *sizeP) |
e0001a05 | 6107 | { |
499ac353 | 6108 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
e0001a05 NC |
6109 | } |
6110 | ||
6111 | ||
6112 | int | |
7fa3d080 | 6113 | md_estimate_size_before_relax (fragS *fragP, segT seg ATTRIBUTE_UNUSED) |
e0001a05 | 6114 | { |
34e41783 | 6115 | return total_frag_text_expansion (fragP); |
e0001a05 NC |
6116 | } |
6117 | ||
6118 | ||
6119 | /* Translate internal representation of relocation info to BFD target | |
6120 | format. */ | |
6121 | ||
6122 | arelent * | |
30f725a1 | 6123 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
e0001a05 NC |
6124 | { |
6125 | arelent *reloc; | |
6126 | ||
325801bd TS |
6127 | reloc = XNEW (arelent); |
6128 | reloc->sym_ptr_ptr = XNEW (asymbol *); | |
e0001a05 NC |
6129 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
6130 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
6131 | ||
6132 | /* Make sure none of our internal relocations make it this far. | |
6133 | They'd better have been fully resolved by this point. */ | |
9c2799c2 | 6134 | gas_assert ((int) fixp->fx_r_type > 0); |
e0001a05 | 6135 | |
30f725a1 | 6136 | reloc->addend = fixp->fx_offset; |
43cd72b9 | 6137 | |
e0001a05 NC |
6138 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
6139 | if (reloc->howto == NULL) | |
6140 | { | |
6141 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
6142 | _("cannot represent `%s' relocation in object file"), | |
6143 | bfd_get_reloc_code_name (fixp->fx_r_type)); | |
43cd72b9 BW |
6144 | free (reloc->sym_ptr_ptr); |
6145 | free (reloc); | |
e0001a05 NC |
6146 | return NULL; |
6147 | } | |
6148 | ||
6149 | if (!fixp->fx_pcrel != !reloc->howto->pc_relative) | |
1bbb5f21 | 6150 | as_fatal (_("internal error; cannot generate `%s' relocation"), |
43cd72b9 | 6151 | bfd_get_reloc_code_name (fixp->fx_r_type)); |
e0001a05 | 6152 | |
e0001a05 NC |
6153 | return reloc; |
6154 | } | |
6155 | ||
7fa3d080 BW |
6156 | \f |
6157 | /* Checks for resource conflicts between instructions. */ | |
6158 | ||
c138bc38 BW |
6159 | /* The func unit stuff could be implemented as bit-vectors rather |
6160 | than the iterative approach here. If it ends up being too | |
7fa3d080 BW |
6161 | slow, we will switch it. */ |
6162 | ||
c138bc38 | 6163 | resource_table * |
7fa3d080 BW |
6164 | new_resource_table (void *data, |
6165 | int cycles, | |
6166 | int nu, | |
6167 | unit_num_copies_func uncf, | |
6168 | opcode_num_units_func onuf, | |
6169 | opcode_funcUnit_use_unit_func ouuf, | |
6170 | opcode_funcUnit_use_stage_func ousf) | |
6171 | { | |
6172 | int i; | |
325801bd | 6173 | resource_table *rt = XNEW (resource_table); |
7fa3d080 BW |
6174 | rt->data = data; |
6175 | rt->cycles = cycles; | |
6176 | rt->allocated_cycles = cycles; | |
6177 | rt->num_units = nu; | |
6178 | rt->unit_num_copies = uncf; | |
6179 | rt->opcode_num_units = onuf; | |
6180 | rt->opcode_unit_use = ouuf; | |
6181 | rt->opcode_unit_stage = ousf; | |
6182 | ||
add39d23 | 6183 | rt->units = XCNEWVEC (unsigned char *, cycles); |
7fa3d080 | 6184 | for (i = 0; i < cycles; i++) |
add39d23 | 6185 | rt->units[i] = XCNEWVEC (unsigned char, nu); |
7fa3d080 BW |
6186 | |
6187 | return rt; | |
6188 | } | |
6189 | ||
6190 | ||
c138bc38 | 6191 | void |
7fa3d080 BW |
6192 | clear_resource_table (resource_table *rt) |
6193 | { | |
6194 | int i, j; | |
6195 | for (i = 0; i < rt->allocated_cycles; i++) | |
6196 | for (j = 0; j < rt->num_units; j++) | |
6197 | rt->units[i][j] = 0; | |
6198 | } | |
6199 | ||
6200 | ||
6201 | /* We never shrink it, just fake it into thinking so. */ | |
6202 | ||
c138bc38 | 6203 | void |
7fa3d080 BW |
6204 | resize_resource_table (resource_table *rt, int cycles) |
6205 | { | |
6206 | int i, old_cycles; | |
6207 | ||
6208 | rt->cycles = cycles; | |
6209 | if (cycles <= rt->allocated_cycles) | |
6210 | return; | |
6211 | ||
6212 | old_cycles = rt->allocated_cycles; | |
6213 | rt->allocated_cycles = cycles; | |
6214 | ||
325801bd | 6215 | rt->units = XRESIZEVEC (unsigned char *, rt->units, rt->allocated_cycles); |
7fa3d080 | 6216 | for (i = 0; i < old_cycles; i++) |
325801bd | 6217 | rt->units[i] = XRESIZEVEC (unsigned char, rt->units[i], rt->num_units); |
7fa3d080 | 6218 | for (i = old_cycles; i < cycles; i++) |
add39d23 | 6219 | rt->units[i] = XCNEWVEC (unsigned char, rt->num_units); |
7fa3d080 BW |
6220 | } |
6221 | ||
6222 | ||
c138bc38 | 6223 | bfd_boolean |
7fa3d080 BW |
6224 | resources_available (resource_table *rt, xtensa_opcode opcode, int cycle) |
6225 | { | |
6226 | int i; | |
6227 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6228 | ||
c138bc38 | 6229 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6230 | { |
6231 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6232 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
6233 | int copies_in_use = rt->units[stage + cycle][unit]; | |
6234 | int copies = (rt->unit_num_copies) (rt->data, unit); | |
6235 | if (copies_in_use >= copies) | |
6236 | return FALSE; | |
6237 | } | |
6238 | return TRUE; | |
6239 | } | |
7fa3d080 | 6240 | |
c138bc38 BW |
6241 | |
6242 | void | |
7fa3d080 BW |
6243 | reserve_resources (resource_table *rt, xtensa_opcode opcode, int cycle) |
6244 | { | |
6245 | int i; | |
6246 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6247 | ||
c138bc38 | 6248 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6249 | { |
6250 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6251 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
c138bc38 BW |
6252 | /* Note that this allows resources to be oversubscribed. That's |
6253 | essential to the way the optional scheduler works. | |
7fa3d080 BW |
6254 | resources_available reports when a resource is over-subscribed, |
6255 | so it's easy to tell. */ | |
6256 | rt->units[stage + cycle][unit]++; | |
6257 | } | |
6258 | } | |
6259 | ||
6260 | ||
c138bc38 | 6261 | void |
7fa3d080 BW |
6262 | release_resources (resource_table *rt, xtensa_opcode opcode, int cycle) |
6263 | { | |
6264 | int i; | |
6265 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6266 | ||
c138bc38 | 6267 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6268 | { |
6269 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6270 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
9c2799c2 | 6271 | gas_assert (rt->units[stage + cycle][unit] > 0); |
7fa3d080 | 6272 | rt->units[stage + cycle][unit]--; |
7fa3d080 BW |
6273 | } |
6274 | } | |
c138bc38 | 6275 | |
7fa3d080 BW |
6276 | |
6277 | /* Wrapper functions make parameterized resource reservation | |
6278 | more convenient. */ | |
6279 | ||
c138bc38 | 6280 | int |
7fa3d080 BW |
6281 | opcode_funcUnit_use_unit (void *data, xtensa_opcode opcode, int idx) |
6282 | { | |
6283 | xtensa_funcUnit_use *use = xtensa_opcode_funcUnit_use (data, opcode, idx); | |
c138bc38 | 6284 | return use->unit; |
7fa3d080 BW |
6285 | } |
6286 | ||
6287 | ||
c138bc38 | 6288 | int |
7fa3d080 BW |
6289 | opcode_funcUnit_use_stage (void *data, xtensa_opcode opcode, int idx) |
6290 | { | |
6291 | xtensa_funcUnit_use *use = xtensa_opcode_funcUnit_use (data, opcode, idx); | |
6292 | return use->stage; | |
6293 | } | |
6294 | ||
6295 | ||
6296 | /* Note that this function does not check issue constraints, but | |
6297 | solely whether the hardware is available to execute the given | |
c138bc38 | 6298 | instructions together. It also doesn't check if the tinsns |
7fa3d080 | 6299 | write the same state, or access the same tieports. That is |
a1ace8d8 | 6300 | checked by check_t1_t2_reads_and_writes. */ |
7fa3d080 BW |
6301 | |
6302 | static bfd_boolean | |
6303 | resources_conflict (vliw_insn *vinsn) | |
6304 | { | |
6305 | int i; | |
6306 | static resource_table *rt = NULL; | |
6307 | ||
6308 | /* This is the most common case by far. Optimize it. */ | |
6309 | if (vinsn->num_slots == 1) | |
6310 | return FALSE; | |
43cd72b9 | 6311 | |
c138bc38 | 6312 | if (rt == NULL) |
7fa3d080 BW |
6313 | { |
6314 | xtensa_isa isa = xtensa_default_isa; | |
6315 | rt = new_resource_table | |
77cba8a3 | 6316 | (isa, xtensa_num_pipe_stages, |
7fa3d080 BW |
6317 | xtensa_isa_num_funcUnits (isa), |
6318 | (unit_num_copies_func) xtensa_funcUnit_num_copies, | |
6319 | (opcode_num_units_func) xtensa_opcode_num_funcUnit_uses, | |
6320 | opcode_funcUnit_use_unit, | |
6321 | opcode_funcUnit_use_stage); | |
6322 | } | |
43cd72b9 | 6323 | |
7fa3d080 | 6324 | clear_resource_table (rt); |
43cd72b9 | 6325 | |
7fa3d080 BW |
6326 | for (i = 0; i < vinsn->num_slots; i++) |
6327 | { | |
6328 | if (!resources_available (rt, vinsn->slots[i].opcode, 0)) | |
6329 | return TRUE; | |
6330 | reserve_resources (rt, vinsn->slots[i].opcode, 0); | |
6331 | } | |
e0001a05 | 6332 | |
7fa3d080 BW |
6333 | return FALSE; |
6334 | } | |
e0001a05 | 6335 | |
7fa3d080 BW |
6336 | \f |
6337 | /* finish_vinsn, emit_single_op and helper functions. */ | |
e0001a05 | 6338 | |
7fa3d080 BW |
6339 | static bfd_boolean find_vinsn_conflicts (vliw_insn *); |
6340 | static xtensa_format xg_find_narrowest_format (vliw_insn *); | |
7fa3d080 | 6341 | static void xg_assemble_vliw_tokens (vliw_insn *); |
e0001a05 NC |
6342 | |
6343 | ||
43cd72b9 BW |
6344 | /* We have reached the end of a bundle; emit into the frag. */ |
6345 | ||
e0001a05 | 6346 | static void |
7fa3d080 | 6347 | finish_vinsn (vliw_insn *vinsn) |
e0001a05 | 6348 | { |
43cd72b9 BW |
6349 | IStack slotstack; |
6350 | int i; | |
bf3d1399 | 6351 | int slots; |
e0001a05 | 6352 | |
43cd72b9 | 6353 | if (find_vinsn_conflicts (vinsn)) |
a1ace8d8 BW |
6354 | { |
6355 | xg_clear_vinsn (vinsn); | |
6356 | return; | |
6357 | } | |
43cd72b9 BW |
6358 | |
6359 | /* First, find a format that works. */ | |
6360 | if (vinsn->format == XTENSA_UNDEFINED) | |
6361 | vinsn->format = xg_find_narrowest_format (vinsn); | |
6362 | ||
bf3d1399 AM |
6363 | slots = xtensa_format_num_slots (xtensa_default_isa, vinsn->format); |
6364 | if (slots > 1 | |
19fc3723 SA |
6365 | && produce_flix == FLIX_NONE) |
6366 | { | |
6367 | as_bad (_("The option \"--no-allow-flix\" prohibits multi-slot flix.")); | |
6368 | xg_clear_vinsn (vinsn); | |
6369 | return; | |
6370 | } | |
6371 | ||
43cd72b9 BW |
6372 | if (vinsn->format == XTENSA_UNDEFINED) |
6373 | { | |
3b4dbbbf | 6374 | as_bad (_("couldn't find a valid instruction format")); |
43cd72b9 BW |
6375 | fprintf (stderr, _(" ops were: ")); |
6376 | for (i = 0; i < vinsn->num_slots; i++) | |
6377 | fprintf (stderr, _(" %s;"), | |
6378 | xtensa_opcode_name (xtensa_default_isa, | |
6379 | vinsn->slots[i].opcode)); | |
6380 | fprintf (stderr, _("\n")); | |
6381 | xg_clear_vinsn (vinsn); | |
6382 | return; | |
6383 | } | |
6384 | ||
bf3d1399 | 6385 | if (vinsn->num_slots != slots) |
e0001a05 | 6386 | { |
bf3d1399 AM |
6387 | as_bad (_("mismatch for format '%s': #slots = %d, #opcodes = %d"), |
6388 | xtensa_format_name (xtensa_default_isa, vinsn->format), | |
6e98b342 | 6389 | slots, vinsn->num_slots); |
43cd72b9 BW |
6390 | xg_clear_vinsn (vinsn); |
6391 | return; | |
6392 | } | |
e0001a05 | 6393 | |
c138bc38 | 6394 | if (resources_conflict (vinsn)) |
43cd72b9 | 6395 | { |
3b4dbbbf | 6396 | as_bad (_("illegal resource usage in bundle")); |
43cd72b9 BW |
6397 | fprintf (stderr, " ops were: "); |
6398 | for (i = 0; i < vinsn->num_slots; i++) | |
6399 | fprintf (stderr, " %s;", | |
6400 | xtensa_opcode_name (xtensa_default_isa, | |
6401 | vinsn->slots[i].opcode)); | |
6402 | fprintf (stderr, "\n"); | |
6403 | xg_clear_vinsn (vinsn); | |
6404 | return; | |
6405 | } | |
6406 | ||
6407 | for (i = 0; i < vinsn->num_slots; i++) | |
6408 | { | |
6409 | if (vinsn->slots[i].opcode != XTENSA_UNDEFINED) | |
e0001a05 | 6410 | { |
43cd72b9 BW |
6411 | symbolS *lit_sym = NULL; |
6412 | int j; | |
6413 | bfd_boolean e = FALSE; | |
6414 | bfd_boolean saved_density = density_supported; | |
6415 | ||
6416 | /* We don't want to narrow ops inside multi-slot bundles. */ | |
6417 | if (vinsn->num_slots > 1) | |
6418 | density_supported = FALSE; | |
6419 | ||
6420 | istack_init (&slotstack); | |
6421 | if (vinsn->slots[i].opcode == xtensa_nop_opcode) | |
e0001a05 | 6422 | { |
43cd72b9 BW |
6423 | vinsn->slots[i].opcode = |
6424 | xtensa_format_slot_nop_opcode (xtensa_default_isa, | |
6425 | vinsn->format, i); | |
6426 | vinsn->slots[i].ntok = 0; | |
6427 | } | |
e0001a05 | 6428 | |
43cd72b9 BW |
6429 | if (xg_expand_assembly_insn (&slotstack, &vinsn->slots[i])) |
6430 | { | |
6431 | e = TRUE; | |
6432 | continue; | |
e0001a05 | 6433 | } |
e0001a05 | 6434 | |
43cd72b9 | 6435 | density_supported = saved_density; |
e0001a05 | 6436 | |
43cd72b9 BW |
6437 | if (e) |
6438 | { | |
6439 | xg_clear_vinsn (vinsn); | |
6440 | return; | |
6441 | } | |
e0001a05 | 6442 | |
0fa77c95 | 6443 | for (j = 0; j < slotstack.ninsn; j++) |
43cd72b9 BW |
6444 | { |
6445 | TInsn *insn = &slotstack.insn[j]; | |
6446 | if (insn->insn_type == ITYPE_LITERAL) | |
6447 | { | |
9c2799c2 | 6448 | gas_assert (lit_sym == NULL); |
43cd72b9 BW |
6449 | lit_sym = xg_assemble_literal (insn); |
6450 | } | |
6451 | else | |
6452 | { | |
9c2799c2 | 6453 | gas_assert (insn->insn_type == ITYPE_INSN); |
43cd72b9 BW |
6454 | if (lit_sym) |
6455 | xg_resolve_literals (insn, lit_sym); | |
0fa77c95 BW |
6456 | if (j != slotstack.ninsn - 1) |
6457 | emit_single_op (insn); | |
43cd72b9 BW |
6458 | } |
6459 | } | |
6460 | ||
6461 | if (vinsn->num_slots > 1) | |
6462 | { | |
6463 | if (opcode_fits_format_slot | |
6464 | (slotstack.insn[slotstack.ninsn - 1].opcode, | |
6465 | vinsn->format, i)) | |
6466 | { | |
6467 | vinsn->slots[i] = slotstack.insn[slotstack.ninsn - 1]; | |
6468 | } | |
6469 | else | |
6470 | { | |
b2d179be | 6471 | emit_single_op (&slotstack.insn[slotstack.ninsn - 1]); |
43cd72b9 BW |
6472 | if (vinsn->format == XTENSA_UNDEFINED) |
6473 | vinsn->slots[i].opcode = xtensa_nop_opcode; | |
6474 | else | |
c138bc38 | 6475 | vinsn->slots[i].opcode |
43cd72b9 BW |
6476 | = xtensa_format_slot_nop_opcode (xtensa_default_isa, |
6477 | vinsn->format, i); | |
6478 | ||
6479 | vinsn->slots[i].ntok = 0; | |
6480 | } | |
6481 | } | |
6482 | else | |
6483 | { | |
6484 | vinsn->slots[0] = slotstack.insn[slotstack.ninsn - 1]; | |
6485 | vinsn->format = XTENSA_UNDEFINED; | |
6486 | } | |
6487 | } | |
6488 | } | |
6489 | ||
6490 | /* Now check resource conflicts on the modified bundle. */ | |
c138bc38 | 6491 | if (resources_conflict (vinsn)) |
43cd72b9 | 6492 | { |
3b4dbbbf | 6493 | as_bad (_("illegal resource usage in bundle")); |
43cd72b9 BW |
6494 | fprintf (stderr, " ops were: "); |
6495 | for (i = 0; i < vinsn->num_slots; i++) | |
6496 | fprintf (stderr, " %s;", | |
6497 | xtensa_opcode_name (xtensa_default_isa, | |
6498 | vinsn->slots[i].opcode)); | |
6499 | fprintf (stderr, "\n"); | |
6500 | xg_clear_vinsn (vinsn); | |
6501 | return; | |
6502 | } | |
6503 | ||
6504 | /* First, find a format that works. */ | |
6505 | if (vinsn->format == XTENSA_UNDEFINED) | |
6506 | vinsn->format = xg_find_narrowest_format (vinsn); | |
6507 | ||
6508 | xg_assemble_vliw_tokens (vinsn); | |
6509 | ||
6510 | xg_clear_vinsn (vinsn); | |
a82c7d90 DW |
6511 | |
6512 | xtensa_check_frag_count (); | |
43cd72b9 BW |
6513 | } |
6514 | ||
6515 | ||
6516 | /* Given an vliw instruction, what conflicts are there in register | |
6517 | usage and in writes to states and queues? | |
6518 | ||
6519 | This function does two things: | |
6520 | 1. Reports an error when a vinsn contains illegal combinations | |
6521 | of writes to registers states or queues. | |
6522 | 2. Marks individual tinsns as not relaxable if the combination | |
6523 | contains antidependencies. | |
6524 | ||
6525 | Job 2 handles things like swap semantics in instructions that need | |
6526 | to be relaxed. For example, | |
6527 | ||
6528 | addi a0, a1, 100000 | |
6529 | ||
6530 | normally would be relaxed to | |
6531 | ||
6532 | l32r a0, some_label | |
6533 | add a0, a1, a0 | |
6534 | ||
6535 | _but_, if the above instruction is bundled with an a0 reader, e.g., | |
6536 | ||
6537 | { addi a0, a1, 10000 ; add a2, a0, a4 ; } | |
6538 | ||
6539 | then we can't relax it into | |
6540 | ||
6541 | l32r a0, some_label | |
6542 | { add a0, a1, a0 ; add a2, a0, a4 ; } | |
6543 | ||
6544 | because the value of a0 is trashed before the second add can read it. */ | |
6545 | ||
7fa3d080 BW |
6546 | static char check_t1_t2_reads_and_writes (TInsn *, TInsn *); |
6547 | ||
43cd72b9 | 6548 | static bfd_boolean |
7fa3d080 | 6549 | find_vinsn_conflicts (vliw_insn *vinsn) |
43cd72b9 BW |
6550 | { |
6551 | int i, j; | |
6552 | int branches = 0; | |
6553 | xtensa_isa isa = xtensa_default_isa; | |
6554 | ||
9c2799c2 | 6555 | gas_assert (!past_xtensa_end); |
43cd72b9 BW |
6556 | |
6557 | for (i = 0 ; i < vinsn->num_slots; i++) | |
6558 | { | |
6559 | TInsn *op1 = &vinsn->slots[i]; | |
6560 | if (op1->is_specific_opcode) | |
6561 | op1->keep_wide = TRUE; | |
6562 | else | |
6563 | op1->keep_wide = FALSE; | |
6564 | } | |
6565 | ||
6566 | for (i = 0 ; i < vinsn->num_slots; i++) | |
6567 | { | |
6568 | TInsn *op1 = &vinsn->slots[i]; | |
6569 | ||
6570 | if (xtensa_opcode_is_branch (isa, op1->opcode) == 1) | |
6571 | branches++; | |
6572 | ||
6573 | for (j = 0; j < vinsn->num_slots; j++) | |
6574 | { | |
6575 | if (i != j) | |
6576 | { | |
6577 | TInsn *op2 = &vinsn->slots[j]; | |
6578 | char conflict_type = check_t1_t2_reads_and_writes (op1, op2); | |
6579 | switch (conflict_type) | |
6580 | { | |
6581 | case 'c': | |
6582 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same register"), | |
6583 | xtensa_opcode_name (isa, op1->opcode), i, | |
6584 | xtensa_opcode_name (isa, op2->opcode), j); | |
6585 | return TRUE; | |
6586 | case 'd': | |
6587 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same state"), | |
6588 | xtensa_opcode_name (isa, op1->opcode), i, | |
6589 | xtensa_opcode_name (isa, op2->opcode), j); | |
6590 | return TRUE; | |
6591 | case 'e': | |
53dfbcc7 | 6592 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same port"), |
43cd72b9 BW |
6593 | xtensa_opcode_name (isa, op1->opcode), i, |
6594 | xtensa_opcode_name (isa, op2->opcode), j); | |
6595 | return TRUE; | |
6596 | case 'f': | |
53dfbcc7 | 6597 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) both have volatile port accesses"), |
43cd72b9 BW |
6598 | xtensa_opcode_name (isa, op1->opcode), i, |
6599 | xtensa_opcode_name (isa, op2->opcode), j); | |
6600 | return TRUE; | |
6601 | default: | |
6602 | /* Everything is OK. */ | |
6603 | break; | |
6604 | } | |
6605 | op2->is_specific_opcode = (op2->is_specific_opcode | |
6606 | || conflict_type == 'a'); | |
6607 | } | |
6608 | } | |
6609 | } | |
6610 | ||
6611 | if (branches > 1) | |
6612 | { | |
6613 | as_bad (_("multiple branches or jumps in the same bundle")); | |
6614 | return TRUE; | |
6615 | } | |
6616 | ||
6617 | return FALSE; | |
6618 | } | |
6619 | ||
6620 | ||
a1ace8d8 | 6621 | /* Check how the state used by t1 and t2 relate. |
43cd72b9 BW |
6622 | Cases found are: |
6623 | ||
6624 | case A: t1 reads a register t2 writes (an antidependency within a bundle) | |
6625 | case B: no relationship between what is read and written (both could | |
6626 | read the same reg though) | |
c138bc38 | 6627 | case C: t1 writes a register t2 writes (a register conflict within a |
43cd72b9 BW |
6628 | bundle) |
6629 | case D: t1 writes a state that t2 also writes | |
6630 | case E: t1 writes a tie queue that t2 also writes | |
a1ace8d8 | 6631 | case F: two volatile queue accesses |
43cd72b9 BW |
6632 | */ |
6633 | ||
6634 | static char | |
7fa3d080 | 6635 | check_t1_t2_reads_and_writes (TInsn *t1, TInsn *t2) |
43cd72b9 BW |
6636 | { |
6637 | xtensa_isa isa = xtensa_default_isa; | |
6638 | xtensa_regfile t1_regfile, t2_regfile; | |
6639 | int t1_reg, t2_reg; | |
6640 | int t1_base_reg, t1_last_reg; | |
6641 | int t2_base_reg, t2_last_reg; | |
6642 | char t1_inout, t2_inout; | |
6643 | int i, j; | |
6644 | char conflict = 'b'; | |
6645 | int t1_states; | |
6646 | int t2_states; | |
6647 | int t1_interfaces; | |
6648 | int t2_interfaces; | |
6649 | bfd_boolean t1_volatile = FALSE; | |
6650 | bfd_boolean t2_volatile = FALSE; | |
6651 | ||
6652 | /* Check registers. */ | |
6653 | for (j = 0; j < t2->ntok; j++) | |
6654 | { | |
6655 | if (xtensa_operand_is_register (isa, t2->opcode, j) != 1) | |
6656 | continue; | |
6657 | ||
6658 | t2_regfile = xtensa_operand_regfile (isa, t2->opcode, j); | |
6659 | t2_base_reg = t2->tok[j].X_add_number; | |
6660 | t2_last_reg = t2_base_reg + xtensa_operand_num_regs (isa, t2->opcode, j); | |
6661 | ||
6662 | for (i = 0; i < t1->ntok; i++) | |
6663 | { | |
6664 | if (xtensa_operand_is_register (isa, t1->opcode, i) != 1) | |
6665 | continue; | |
6666 | ||
6667 | t1_regfile = xtensa_operand_regfile (isa, t1->opcode, i); | |
6668 | ||
6669 | if (t1_regfile != t2_regfile) | |
6670 | continue; | |
6671 | ||
6672 | t1_inout = xtensa_operand_inout (isa, t1->opcode, i); | |
6673 | t2_inout = xtensa_operand_inout (isa, t2->opcode, j); | |
6674 | ||
6675 | if (xtensa_operand_is_known_reg (isa, t1->opcode, i) == 0 | |
6676 | || xtensa_operand_is_known_reg (isa, t2->opcode, j) == 0) | |
6677 | { | |
6678 | if (t1_inout == 'm' || t1_inout == 'o' | |
6679 | || t2_inout == 'm' || t2_inout == 'o') | |
6680 | { | |
6681 | conflict = 'a'; | |
6682 | continue; | |
6683 | } | |
6684 | } | |
6685 | ||
6686 | t1_base_reg = t1->tok[i].X_add_number; | |
6687 | t1_last_reg = (t1_base_reg | |
6688 | + xtensa_operand_num_regs (isa, t1->opcode, i)); | |
6689 | ||
6690 | for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++) | |
6691 | { | |
6692 | for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++) | |
6693 | { | |
6694 | if (t1_reg != t2_reg) | |
6695 | continue; | |
6696 | ||
6697 | if (t2_inout == 'i' && (t1_inout == 'm' || t1_inout == 'o')) | |
7fa3d080 BW |
6698 | { |
6699 | conflict = 'a'; | |
6700 | continue; | |
6701 | } | |
43cd72b9 | 6702 | |
7fa3d080 BW |
6703 | if (t1_inout == 'i' && (t2_inout == 'm' || t2_inout == 'o')) |
6704 | { | |
6705 | conflict = 'a'; | |
6706 | continue; | |
6707 | } | |
43cd72b9 | 6708 | |
7fa3d080 BW |
6709 | if (t1_inout != 'i' && t2_inout != 'i') |
6710 | return 'c'; | |
6711 | } | |
6712 | } | |
6713 | } | |
6714 | } | |
43cd72b9 | 6715 | |
7fa3d080 BW |
6716 | /* Check states. */ |
6717 | t1_states = xtensa_opcode_num_stateOperands (isa, t1->opcode); | |
6718 | t2_states = xtensa_opcode_num_stateOperands (isa, t2->opcode); | |
6719 | for (j = 0; j < t2_states; j++) | |
43cd72b9 | 6720 | { |
7fa3d080 BW |
6721 | xtensa_state t2_so = xtensa_stateOperand_state (isa, t2->opcode, j); |
6722 | t2_inout = xtensa_stateOperand_inout (isa, t2->opcode, j); | |
6723 | for (i = 0; i < t1_states; i++) | |
6724 | { | |
6725 | xtensa_state t1_so = xtensa_stateOperand_state (isa, t1->opcode, i); | |
6726 | t1_inout = xtensa_stateOperand_inout (isa, t1->opcode, i); | |
1fa3cd83 | 6727 | if (t1_so != t2_so || xtensa_state_is_shared_or (isa, t1_so) == 1) |
7fa3d080 | 6728 | continue; |
43cd72b9 | 6729 | |
7fa3d080 BW |
6730 | if (t2_inout == 'i' && (t1_inout == 'm' || t1_inout == 'o')) |
6731 | { | |
6732 | conflict = 'a'; | |
6733 | continue; | |
6734 | } | |
c138bc38 | 6735 | |
7fa3d080 BW |
6736 | if (t1_inout == 'i' && (t2_inout == 'm' || t2_inout == 'o')) |
6737 | { | |
6738 | conflict = 'a'; | |
6739 | continue; | |
6740 | } | |
c138bc38 | 6741 | |
7fa3d080 BW |
6742 | if (t1_inout != 'i' && t2_inout != 'i') |
6743 | return 'd'; | |
c138bc38 | 6744 | } |
7fa3d080 | 6745 | } |
43cd72b9 | 6746 | |
7fa3d080 BW |
6747 | /* Check tieports. */ |
6748 | t1_interfaces = xtensa_opcode_num_interfaceOperands (isa, t1->opcode); | |
6749 | t2_interfaces = xtensa_opcode_num_interfaceOperands (isa, t2->opcode); | |
c138bc38 | 6750 | for (j = 0; j < t2_interfaces; j++) |
43cd72b9 | 6751 | { |
7fa3d080 BW |
6752 | xtensa_interface t2_int |
6753 | = xtensa_interfaceOperand_interface (isa, t2->opcode, j); | |
a1ace8d8 BW |
6754 | int t2_class = xtensa_interface_class_id (isa, t2_int); |
6755 | ||
53dfbcc7 | 6756 | t2_inout = xtensa_interface_inout (isa, t2_int); |
a1ace8d8 | 6757 | if (xtensa_interface_has_side_effect (isa, t2_int) == 1) |
7fa3d080 | 6758 | t2_volatile = TRUE; |
a1ace8d8 | 6759 | |
7fa3d080 BW |
6760 | for (i = 0; i < t1_interfaces; i++) |
6761 | { | |
6762 | xtensa_interface t1_int | |
6763 | = xtensa_interfaceOperand_interface (isa, t1->opcode, j); | |
2eccd1b4 | 6764 | int t1_class = xtensa_interface_class_id (isa, t1_int); |
a1ace8d8 | 6765 | |
53dfbcc7 | 6766 | t1_inout = xtensa_interface_inout (isa, t1_int); |
a1ace8d8 | 6767 | if (xtensa_interface_has_side_effect (isa, t1_int) == 1) |
7fa3d080 | 6768 | t1_volatile = TRUE; |
a1ace8d8 BW |
6769 | |
6770 | if (t1_volatile && t2_volatile && (t1_class == t2_class)) | |
6771 | return 'f'; | |
c138bc38 | 6772 | |
7fa3d080 BW |
6773 | if (t1_int != t2_int) |
6774 | continue; | |
c138bc38 | 6775 | |
7fa3d080 BW |
6776 | if (t2_inout == 'i' && t1_inout == 'o') |
6777 | { | |
6778 | conflict = 'a'; | |
6779 | continue; | |
6780 | } | |
c138bc38 | 6781 | |
7fa3d080 BW |
6782 | if (t1_inout == 'i' && t2_inout == 'o') |
6783 | { | |
6784 | conflict = 'a'; | |
6785 | continue; | |
6786 | } | |
c138bc38 | 6787 | |
7fa3d080 BW |
6788 | if (t1_inout != 'i' && t2_inout != 'i') |
6789 | return 'e'; | |
6790 | } | |
43cd72b9 | 6791 | } |
c138bc38 | 6792 | |
7fa3d080 | 6793 | return conflict; |
43cd72b9 BW |
6794 | } |
6795 | ||
6796 | ||
6797 | static xtensa_format | |
7fa3d080 | 6798 | xg_find_narrowest_format (vliw_insn *vinsn) |
43cd72b9 BW |
6799 | { |
6800 | /* Right now we assume that the ops within the vinsn are properly | |
6801 | ordered for the slots that the programmer wanted them in. In | |
6802 | other words, we don't rearrange the ops in hopes of finding a | |
6803 | better format. The scheduler handles that. */ | |
6804 | ||
6805 | xtensa_isa isa = xtensa_default_isa; | |
6806 | xtensa_format format; | |
43cd72b9 BW |
6807 | xtensa_opcode nop_opcode = xtensa_nop_opcode; |
6808 | ||
65738a7d BW |
6809 | if (vinsn->num_slots == 1) |
6810 | return xg_get_single_format (vinsn->slots[0].opcode); | |
6811 | ||
43cd72b9 BW |
6812 | for (format = 0; format < xtensa_isa_num_formats (isa); format++) |
6813 | { | |
d8392fd9 SA |
6814 | vliw_insn v_copy; |
6815 | xg_copy_vinsn (&v_copy, vinsn); | |
43cd72b9 BW |
6816 | if (xtensa_format_num_slots (isa, format) == v_copy.num_slots) |
6817 | { | |
6818 | int slot; | |
6819 | int fit = 0; | |
6820 | for (slot = 0; slot < v_copy.num_slots; slot++) | |
6821 | { | |
6822 | if (v_copy.slots[slot].opcode == nop_opcode) | |
6823 | { | |
6824 | v_copy.slots[slot].opcode = | |
6825 | xtensa_format_slot_nop_opcode (isa, format, slot); | |
6826 | v_copy.slots[slot].ntok = 0; | |
6827 | } | |
6828 | ||
6829 | if (opcode_fits_format_slot (v_copy.slots[slot].opcode, | |
6830 | format, slot)) | |
6831 | fit++; | |
7fa3d080 | 6832 | else if (v_copy.num_slots > 1) |
43cd72b9 | 6833 | { |
7fa3d080 BW |
6834 | TInsn widened; |
6835 | /* Try the widened version. */ | |
6836 | if (!v_copy.slots[slot].keep_wide | |
6837 | && !v_copy.slots[slot].is_specific_opcode | |
84b08ed9 BW |
6838 | && xg_is_single_relaxable_insn (&v_copy.slots[slot], |
6839 | &widened, TRUE) | |
7fa3d080 BW |
6840 | && opcode_fits_format_slot (widened.opcode, |
6841 | format, slot)) | |
43cd72b9 | 6842 | { |
7fa3d080 BW |
6843 | v_copy.slots[slot] = widened; |
6844 | fit++; | |
43cd72b9 BW |
6845 | } |
6846 | } | |
6847 | } | |
6848 | if (fit == v_copy.num_slots) | |
6849 | { | |
d8392fd9 | 6850 | xg_copy_vinsn (vinsn, &v_copy); |
43cd72b9 BW |
6851 | xtensa_format_encode (isa, format, vinsn->insnbuf); |
6852 | vinsn->format = format; | |
6853 | break; | |
6854 | } | |
6855 | } | |
6856 | } | |
6857 | ||
6858 | if (format == xtensa_isa_num_formats (isa)) | |
6859 | return XTENSA_UNDEFINED; | |
6860 | ||
6861 | return format; | |
6862 | } | |
6863 | ||
6864 | ||
6865 | /* Return the additional space needed in a frag | |
6866 | for possible relaxations of any ops in a VLIW insn. | |
6867 | Also fill out the relaxations that might be required of | |
6868 | each tinsn in the vinsn. */ | |
6869 | ||
6870 | static int | |
e7da6241 | 6871 | relaxation_requirements (vliw_insn *vinsn, bfd_boolean *pfinish_frag) |
43cd72b9 | 6872 | { |
e7da6241 | 6873 | bfd_boolean finish_frag = FALSE; |
43cd72b9 BW |
6874 | int extra_space = 0; |
6875 | int slot; | |
6876 | ||
6877 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
6878 | { | |
6879 | TInsn *tinsn = &vinsn->slots[slot]; | |
6880 | if (!tinsn_has_symbolic_operands (tinsn)) | |
6881 | { | |
6882 | /* A narrow instruction could be widened later to help | |
6883 | alignment issues. */ | |
84b08ed9 | 6884 | if (xg_is_single_relaxable_insn (tinsn, 0, TRUE) |
43cd72b9 BW |
6885 | && !tinsn->is_specific_opcode |
6886 | && vinsn->num_slots == 1) | |
6887 | { | |
6888 | /* Difference in bytes between narrow and wide insns... */ | |
6889 | extra_space += 1; | |
6890 | tinsn->subtype = RELAX_NARROW; | |
43cd72b9 BW |
6891 | } |
6892 | } | |
6893 | else | |
6894 | { | |
b08b5071 BW |
6895 | if (workaround_b_j_loop_end |
6896 | && tinsn->opcode == xtensa_jx_opcode | |
43cd72b9 BW |
6897 | && use_transform ()) |
6898 | { | |
6899 | /* Add 2 of these. */ | |
6900 | extra_space += 3; /* for the nop size */ | |
6901 | tinsn->subtype = RELAX_ADD_NOP_IF_PRE_LOOP_END; | |
6902 | } | |
c138bc38 | 6903 | |
43cd72b9 BW |
6904 | /* Need to assemble it with space for the relocation. */ |
6905 | if (xg_is_relaxable_insn (tinsn, 0) | |
6906 | && !tinsn->is_specific_opcode) | |
6907 | { | |
6908 | int max_size = xg_get_max_insn_widen_size (tinsn->opcode); | |
6909 | int max_literal_size = | |
6910 | xg_get_max_insn_widen_literal_size (tinsn->opcode); | |
c138bc38 | 6911 | |
43cd72b9 | 6912 | tinsn->literal_space = max_literal_size; |
c138bc38 | 6913 | |
43cd72b9 | 6914 | tinsn->subtype = RELAX_IMMED; |
43cd72b9 BW |
6915 | extra_space += max_size; |
6916 | } | |
6917 | else | |
6918 | { | |
e7da6241 BW |
6919 | /* A fix record will be added for this instruction prior |
6920 | to relaxation, so make it end the frag. */ | |
6921 | finish_frag = TRUE; | |
43cd72b9 BW |
6922 | } |
6923 | } | |
6924 | } | |
e7da6241 | 6925 | *pfinish_frag = finish_frag; |
43cd72b9 BW |
6926 | return extra_space; |
6927 | } | |
6928 | ||
6929 | ||
6930 | static void | |
b2d179be | 6931 | bundle_tinsn (TInsn *tinsn, vliw_insn *vinsn) |
43cd72b9 BW |
6932 | { |
6933 | xtensa_isa isa = xtensa_default_isa; | |
b2d179be | 6934 | int slot, chosen_slot; |
43cd72b9 | 6935 | |
b2d179be | 6936 | vinsn->format = xg_get_single_format (tinsn->opcode); |
9c2799c2 | 6937 | gas_assert (vinsn->format != XTENSA_UNDEFINED); |
b2d179be | 6938 | vinsn->num_slots = xtensa_format_num_slots (isa, vinsn->format); |
43cd72b9 | 6939 | |
b2d179be BW |
6940 | chosen_slot = xg_get_single_slot (tinsn->opcode); |
6941 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
43cd72b9 | 6942 | { |
b2d179be BW |
6943 | if (slot == chosen_slot) |
6944 | vinsn->slots[slot] = *tinsn; | |
6945 | else | |
6946 | { | |
6947 | vinsn->slots[slot].opcode = | |
6948 | xtensa_format_slot_nop_opcode (isa, vinsn->format, slot); | |
6949 | vinsn->slots[slot].ntok = 0; | |
6950 | vinsn->slots[slot].insn_type = ITYPE_INSN; | |
6951 | } | |
43cd72b9 | 6952 | } |
43cd72b9 BW |
6953 | } |
6954 | ||
6955 | ||
6956 | static bfd_boolean | |
7fa3d080 | 6957 | emit_single_op (TInsn *orig_insn) |
43cd72b9 BW |
6958 | { |
6959 | int i; | |
6960 | IStack istack; /* put instructions into here */ | |
6961 | symbolS *lit_sym = NULL; | |
6962 | symbolS *label_sym = NULL; | |
6963 | ||
6964 | istack_init (&istack); | |
6965 | ||
6966 | /* Special-case for "movi aX, foo" which is guaranteed to need relaxing. | |
c138bc38 BW |
6967 | Because the scheduling and bundling characteristics of movi and |
6968 | l32r or const16 are so different, we can do much better if we relax | |
43cd72b9 | 6969 | it prior to scheduling and bundling, rather than after. */ |
c138bc38 | 6970 | if ((orig_insn->opcode == xtensa_movi_opcode |
b08b5071 BW |
6971 | || orig_insn->opcode == xtensa_movi_n_opcode) |
6972 | && !cur_vinsn.inside_bundle | |
43cd72b9 | 6973 | && (orig_insn->tok[1].X_op == O_symbol |
28dbbc02 BW |
6974 | || orig_insn->tok[1].X_op == O_pltrel |
6975 | || orig_insn->tok[1].X_op == O_tlsfunc | |
6976 | || orig_insn->tok[1].X_op == O_tlsarg | |
6977 | || orig_insn->tok[1].X_op == O_tpoff | |
6978 | || orig_insn->tok[1].X_op == O_dtpoff) | |
482fd9f9 | 6979 | && !orig_insn->is_specific_opcode && use_transform ()) |
43cd72b9 BW |
6980 | xg_assembly_relax (&istack, orig_insn, now_seg, frag_now, 0, 1, 0); |
6981 | else | |
6982 | if (xg_expand_assembly_insn (&istack, orig_insn)) | |
6983 | return TRUE; | |
6984 | ||
6985 | for (i = 0; i < istack.ninsn; i++) | |
6986 | { | |
6987 | TInsn *insn = &istack.insn[i]; | |
c138bc38 | 6988 | switch (insn->insn_type) |
43cd72b9 BW |
6989 | { |
6990 | case ITYPE_LITERAL: | |
9c2799c2 | 6991 | gas_assert (lit_sym == NULL); |
43cd72b9 BW |
6992 | lit_sym = xg_assemble_literal (insn); |
6993 | break; | |
6994 | case ITYPE_LABEL: | |
6995 | { | |
6996 | static int relaxed_sym_idx = 0; | |
325801bd | 6997 | char *label = XNEWVEC (char, strlen (FAKE_LABEL_NAME) + 12); |
43cd72b9 BW |
6998 | sprintf (label, "%s_rl_%x", FAKE_LABEL_NAME, relaxed_sym_idx++); |
6999 | colon (label); | |
9c2799c2 | 7000 | gas_assert (label_sym == NULL); |
43cd72b9 | 7001 | label_sym = symbol_find_or_make (label); |
9c2799c2 | 7002 | gas_assert (label_sym); |
43cd72b9 BW |
7003 | free (label); |
7004 | } | |
7005 | break; | |
7006 | case ITYPE_INSN: | |
b2d179be BW |
7007 | { |
7008 | vliw_insn v; | |
7009 | if (lit_sym) | |
7010 | xg_resolve_literals (insn, lit_sym); | |
7011 | if (label_sym) | |
7012 | xg_resolve_labels (insn, label_sym); | |
7013 | xg_init_vinsn (&v); | |
7014 | bundle_tinsn (insn, &v); | |
7015 | finish_vinsn (&v); | |
7016 | xg_free_vinsn (&v); | |
7017 | } | |
43cd72b9 BW |
7018 | break; |
7019 | default: | |
9c2799c2 | 7020 | gas_assert (0); |
43cd72b9 BW |
7021 | break; |
7022 | } | |
7023 | } | |
7024 | return FALSE; | |
7025 | } | |
7026 | ||
7027 | ||
34e41783 BW |
7028 | static int |
7029 | total_frag_text_expansion (fragS *fragP) | |
7030 | { | |
7031 | int slot; | |
7032 | int total_expansion = 0; | |
7033 | ||
62af60e2 | 7034 | for (slot = 0; slot < config_max_slots; slot++) |
34e41783 BW |
7035 | total_expansion += fragP->tc_frag_data.text_expansion[slot]; |
7036 | ||
7037 | return total_expansion; | |
7038 | } | |
7039 | ||
7040 | ||
43cd72b9 BW |
7041 | /* Emit a vliw instruction to the current fragment. */ |
7042 | ||
7fa3d080 BW |
7043 | static void |
7044 | xg_assemble_vliw_tokens (vliw_insn *vinsn) | |
43cd72b9 | 7045 | { |
e7da6241 | 7046 | bfd_boolean finish_frag; |
43cd72b9 BW |
7047 | bfd_boolean is_jump = FALSE; |
7048 | bfd_boolean is_branch = FALSE; | |
7049 | xtensa_isa isa = xtensa_default_isa; | |
43cd72b9 BW |
7050 | int insn_size; |
7051 | int extra_space; | |
7052 | char *f = NULL; | |
7053 | int slot; | |
b224e962 BW |
7054 | struct dwarf2_line_info debug_line; |
7055 | bfd_boolean loc_directive_seen = FALSE; | |
7056 | TInsn *tinsn; | |
43cd72b9 | 7057 | |
b224e962 | 7058 | memset (&debug_line, 0, sizeof (struct dwarf2_line_info)); |
43cd72b9 BW |
7059 | |
7060 | if (generating_literals) | |
7061 | { | |
7062 | static int reported = 0; | |
7063 | if (reported < 4) | |
7064 | as_bad_where (frag_now->fr_file, frag_now->fr_line, | |
7065 | _("cannot assemble into a literal fragment")); | |
7066 | if (reported == 3) | |
7067 | as_bad (_("...")); | |
7068 | reported++; | |
7069 | return; | |
7070 | } | |
7071 | ||
7072 | if (frag_now_fix () != 0 | |
b08b5071 | 7073 | && (! frag_now->tc_frag_data.is_insn |
43cd72b9 | 7074 | || (vinsn_has_specific_opcodes (vinsn) && use_transform ()) |
28a0da39 | 7075 | || (!use_transform ()) != frag_now->tc_frag_data.is_no_transform |
7c834684 BW |
7076 | || (directive_state[directive_longcalls] |
7077 | != frag_now->tc_frag_data.use_longcalls) | |
43cd72b9 BW |
7078 | || (directive_state[directive_absolute_literals] |
7079 | != frag_now->tc_frag_data.use_absolute_literals))) | |
7080 | { | |
7081 | frag_wane (frag_now); | |
7082 | frag_new (0); | |
7083 | xtensa_set_frag_assembly_state (frag_now); | |
7084 | } | |
7085 | ||
7086 | if (workaround_a0_b_retw | |
7087 | && vinsn->num_slots == 1 | |
7088 | && (get_last_insn_flags (now_seg, now_subseg) & FLAG_IS_A0_WRITER) != 0 | |
7089 | && xtensa_opcode_is_branch (isa, vinsn->slots[0].opcode) == 1 | |
7090 | && use_transform ()) | |
7091 | { | |
7092 | has_a0_b_retw = TRUE; | |
7093 | ||
7094 | /* Mark this fragment with the special RELAX_ADD_NOP_IF_A0_B_RETW. | |
7095 | After the first assembly pass we will check all of them and | |
7096 | add a nop if needed. */ | |
7097 | frag_now->tc_frag_data.is_insn = TRUE; | |
7098 | frag_var (rs_machine_dependent, 4, 4, | |
7099 | RELAX_ADD_NOP_IF_A0_B_RETW, | |
7100 | frag_now->fr_symbol, | |
7101 | frag_now->fr_offset, | |
7102 | NULL); | |
7103 | xtensa_set_frag_assembly_state (frag_now); | |
7104 | frag_now->tc_frag_data.is_insn = TRUE; | |
7105 | frag_var (rs_machine_dependent, 4, 4, | |
7106 | RELAX_ADD_NOP_IF_A0_B_RETW, | |
7107 | frag_now->fr_symbol, | |
7108 | frag_now->fr_offset, | |
7109 | NULL); | |
7110 | xtensa_set_frag_assembly_state (frag_now); | |
7111 | } | |
7112 | ||
b224e962 | 7113 | for (slot = 0; slot < vinsn->num_slots; slot++) |
43cd72b9 | 7114 | { |
b224e962 BW |
7115 | tinsn = &vinsn->slots[slot]; |
7116 | ||
43cd72b9 | 7117 | /* See if the instruction implies an aligned section. */ |
b224e962 | 7118 | if (xtensa_opcode_is_loop (isa, tinsn->opcode) == 1) |
43cd72b9 | 7119 | record_alignment (now_seg, 2); |
c138bc38 | 7120 | |
b224e962 BW |
7121 | /* Determine the best line number for debug info. */ |
7122 | if ((tinsn->loc_directive_seen || !loc_directive_seen) | |
7123 | && (tinsn->debug_line.filenum != debug_line.filenum | |
7124 | || tinsn->debug_line.line < debug_line.line | |
7125 | || tinsn->debug_line.column < debug_line.column)) | |
7126 | debug_line = tinsn->debug_line; | |
7127 | if (tinsn->loc_directive_seen) | |
7128 | loc_directive_seen = TRUE; | |
43cd72b9 BW |
7129 | } |
7130 | ||
7131 | /* Special cases for instructions that force an alignment... */ | |
7132 | /* None of these opcodes are bundle-able. */ | |
7133 | if (xtensa_opcode_is_loop (isa, vinsn->slots[0].opcode) == 1) | |
7134 | { | |
d77b99c9 | 7135 | int max_fill; |
c138bc38 | 7136 | |
05d58145 BW |
7137 | /* Remember the symbol that marks the end of the loop in the frag |
7138 | that marks the start of the loop. This way we can easily find | |
7139 | the end of the loop at the beginning, without adding special code | |
7140 | to mark the loop instructions themselves. */ | |
7141 | symbolS *target_sym = NULL; | |
7142 | if (vinsn->slots[0].tok[1].X_op == O_symbol) | |
7143 | target_sym = vinsn->slots[0].tok[1].X_add_symbol; | |
7144 | ||
43cd72b9 BW |
7145 | xtensa_set_frag_assembly_state (frag_now); |
7146 | frag_now->tc_frag_data.is_insn = TRUE; | |
c138bc38 | 7147 | |
43cd72b9 BW |
7148 | max_fill = get_text_align_max_fill_size |
7149 | (get_text_align_power (xtensa_fetch_width), | |
7150 | TRUE, frag_now->tc_frag_data.is_no_density); | |
7151 | ||
7152 | if (use_transform ()) | |
7153 | frag_var (rs_machine_dependent, max_fill, max_fill, | |
05d58145 | 7154 | RELAX_ALIGN_NEXT_OPCODE, target_sym, 0, NULL); |
43cd72b9 | 7155 | else |
c138bc38 | 7156 | frag_var (rs_machine_dependent, 0, 0, |
05d58145 | 7157 | RELAX_CHECK_ALIGN_NEXT_OPCODE, target_sym, 0, NULL); |
43cd72b9 | 7158 | xtensa_set_frag_assembly_state (frag_now); |
43cd72b9 BW |
7159 | } |
7160 | ||
b08b5071 | 7161 | if (vinsn->slots[0].opcode == xtensa_entry_opcode |
43cd72b9 BW |
7162 | && !vinsn->slots[0].is_specific_opcode) |
7163 | { | |
7164 | xtensa_mark_literal_pool_location (); | |
c3ea6048 | 7165 | xtensa_move_labels (frag_now, 0); |
43cd72b9 BW |
7166 | frag_var (rs_align_test, 1, 1, 0, NULL, 2, NULL); |
7167 | } | |
7168 | ||
7169 | if (vinsn->num_slots == 1) | |
7170 | { | |
7171 | if (workaround_a0_b_retw && use_transform ()) | |
7172 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_A0_WRITER, | |
7173 | is_register_writer (&vinsn->slots[0], "a", 0)); | |
7174 | ||
7175 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_BAD_LOOPEND, | |
7176 | is_bad_loopend_opcode (&vinsn->slots[0])); | |
7177 | } | |
7178 | else | |
7179 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_BAD_LOOPEND, FALSE); | |
7180 | ||
7181 | insn_size = xtensa_format_length (isa, vinsn->format); | |
7182 | ||
e7da6241 | 7183 | extra_space = relaxation_requirements (vinsn, &finish_frag); |
43cd72b9 BW |
7184 | |
7185 | /* vinsn_to_insnbuf will produce the error. */ | |
7186 | if (vinsn->format != XTENSA_UNDEFINED) | |
7187 | { | |
d77b99c9 | 7188 | f = frag_more (insn_size + extra_space); |
43cd72b9 BW |
7189 | xtensa_set_frag_assembly_state (frag_now); |
7190 | frag_now->tc_frag_data.is_insn = TRUE; | |
7191 | } | |
7192 | ||
e7da6241 | 7193 | vinsn_to_insnbuf (vinsn, f, frag_now, FALSE); |
43cd72b9 BW |
7194 | if (vinsn->format == XTENSA_UNDEFINED) |
7195 | return; | |
7196 | ||
d77b99c9 | 7197 | xtensa_insnbuf_to_chars (isa, vinsn->insnbuf, (unsigned char *) f, 0); |
c138bc38 | 7198 | |
b224e962 BW |
7199 | if (debug_type == DEBUG_DWARF2 || loc_directive_seen) |
7200 | dwarf2_gen_line_info (frag_now_fix () - (insn_size + extra_space), | |
7201 | &debug_line); | |
43cd72b9 BW |
7202 | |
7203 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
7204 | { | |
b224e962 | 7205 | tinsn = &vinsn->slots[slot]; |
43cd72b9 | 7206 | frag_now->tc_frag_data.slot_subtypes[slot] = tinsn->subtype; |
7c834684 | 7207 | frag_now->tc_frag_data.slot_symbols[slot] = tinsn->symbol; |
7c834684 | 7208 | frag_now->tc_frag_data.slot_offsets[slot] = tinsn->offset; |
43cd72b9 | 7209 | frag_now->tc_frag_data.literal_frags[slot] = tinsn->literal_frag; |
b46824bd | 7210 | if (tinsn->opcode == xtensa_l32r_opcode) |
8d1015a8 AM |
7211 | frag_now->tc_frag_data.literal_frags[slot] |
7212 | = symbol_get_frag (tinsn->tok[1].X_add_symbol); | |
43cd72b9 BW |
7213 | if (tinsn->literal_space != 0) |
7214 | xg_assemble_literal_space (tinsn->literal_space, slot); | |
19e8f41a | 7215 | frag_now->tc_frag_data.free_reg[slot] = tinsn->extra_arg; |
43cd72b9 BW |
7216 | |
7217 | if (tinsn->subtype == RELAX_NARROW) | |
9c2799c2 | 7218 | gas_assert (vinsn->num_slots == 1); |
43cd72b9 BW |
7219 | if (xtensa_opcode_is_jump (isa, tinsn->opcode) == 1) |
7220 | is_jump = TRUE; | |
7221 | if (xtensa_opcode_is_branch (isa, tinsn->opcode) == 1) | |
7222 | is_branch = TRUE; | |
7223 | ||
e7da6241 BW |
7224 | if (tinsn->subtype || tinsn->symbol || tinsn->offset |
7225 | || tinsn->literal_frag || is_jump || is_branch) | |
43cd72b9 BW |
7226 | finish_frag = TRUE; |
7227 | } | |
7228 | ||
7229 | if (vinsn_has_specific_opcodes (vinsn) && use_transform ()) | |
b08b5071 | 7230 | frag_now->tc_frag_data.is_specific_opcode = TRUE; |
43cd72b9 BW |
7231 | |
7232 | if (finish_frag) | |
7233 | { | |
7234 | frag_variant (rs_machine_dependent, | |
7235 | extra_space, extra_space, RELAX_SLOTS, | |
7236 | frag_now->fr_symbol, frag_now->fr_offset, f); | |
7237 | xtensa_set_frag_assembly_state (frag_now); | |
7238 | } | |
7239 | ||
7240 | /* Special cases for loops: | |
7241 | close_loop_end should be inserted AFTER short_loop. | |
7242 | Make sure that CLOSE loops are processed BEFORE short_loops | |
7243 | when converting them. */ | |
7244 | ||
7245 | /* "short_loop": Add a NOP if the loop is < 4 bytes. */ | |
64b607e6 | 7246 | if (xtensa_opcode_is_loop (isa, vinsn->slots[0].opcode) == 1 |
43cd72b9 BW |
7247 | && !vinsn->slots[0].is_specific_opcode) |
7248 | { | |
7249 | if (workaround_short_loop && use_transform ()) | |
7250 | { | |
7251 | maybe_has_short_loop = TRUE; | |
7252 | frag_now->tc_frag_data.is_insn = TRUE; | |
7253 | frag_var (rs_machine_dependent, 4, 4, | |
7254 | RELAX_ADD_NOP_IF_SHORT_LOOP, | |
7255 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7256 | frag_now->tc_frag_data.is_insn = TRUE; | |
7257 | frag_var (rs_machine_dependent, 4, 4, | |
7258 | RELAX_ADD_NOP_IF_SHORT_LOOP, | |
7259 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7260 | } | |
7261 | ||
7262 | /* "close_loop_end": Add up to 12 bytes of NOPs to keep a | |
7263 | loop at least 12 bytes away from another loop's end. */ | |
7264 | if (workaround_close_loop_end && use_transform ()) | |
7265 | { | |
7266 | maybe_has_close_loop_end = TRUE; | |
7267 | frag_now->tc_frag_data.is_insn = TRUE; | |
7268 | frag_var (rs_machine_dependent, 12, 12, | |
7269 | RELAX_ADD_NOP_IF_CLOSE_LOOP_END, | |
7270 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7271 | } | |
7272 | } | |
7273 | ||
7274 | if (use_transform ()) | |
7275 | { | |
7276 | if (is_jump) | |
7277 | { | |
9c2799c2 | 7278 | gas_assert (finish_frag); |
43cd72b9 | 7279 | frag_var (rs_machine_dependent, |
1beeb686 | 7280 | xtensa_fetch_width, xtensa_fetch_width, |
43cd72b9 BW |
7281 | RELAX_UNREACHABLE, |
7282 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7283 | xtensa_set_frag_assembly_state (frag_now); | |
a82c7d90 | 7284 | xtensa_maybe_create_trampoline_frag (); |
b46824bd MF |
7285 | /* Always create one here. */ |
7286 | xtensa_maybe_create_literal_pool_frag (TRUE, FALSE); | |
43cd72b9 | 7287 | } |
7b1cc377 | 7288 | else if (is_branch && do_align_targets ()) |
43cd72b9 | 7289 | { |
9c2799c2 | 7290 | gas_assert (finish_frag); |
43cd72b9 | 7291 | frag_var (rs_machine_dependent, |
1beeb686 | 7292 | xtensa_fetch_width, xtensa_fetch_width, |
43cd72b9 BW |
7293 | RELAX_MAYBE_UNREACHABLE, |
7294 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7295 | xtensa_set_frag_assembly_state (frag_now); | |
7296 | frag_var (rs_machine_dependent, | |
7297 | 0, 0, | |
7298 | RELAX_MAYBE_DESIRE_ALIGN, | |
7299 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7300 | xtensa_set_frag_assembly_state (frag_now); | |
7301 | } | |
7302 | } | |
7303 | ||
7304 | /* Now, if the original opcode was a call... */ | |
7305 | if (do_align_targets () | |
7306 | && xtensa_opcode_is_call (isa, vinsn->slots[0].opcode) == 1) | |
7307 | { | |
b08b5071 | 7308 | float freq = get_subseg_total_freq (now_seg, now_subseg); |
43cd72b9 BW |
7309 | frag_now->tc_frag_data.is_insn = TRUE; |
7310 | frag_var (rs_machine_dependent, 4, (int) freq, RELAX_DESIRE_ALIGN, | |
7311 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7312 | xtensa_set_frag_assembly_state (frag_now); | |
7313 | } | |
7314 | ||
7315 | if (vinsn_has_specific_opcodes (vinsn) && use_transform ()) | |
7316 | { | |
7317 | frag_wane (frag_now); | |
7318 | frag_new (0); | |
7319 | xtensa_set_frag_assembly_state (frag_now); | |
7320 | } | |
7321 | } | |
7322 | ||
7323 | \f | |
7fa3d080 BW |
7324 | /* xtensa_end and helper functions. */ |
7325 | ||
7326 | static void xtensa_cleanup_align_frags (void); | |
7327 | static void xtensa_fix_target_frags (void); | |
7328 | static void xtensa_mark_narrow_branches (void); | |
7329 | static void xtensa_mark_zcl_first_insns (void); | |
6a7eedfe | 7330 | static void xtensa_mark_difference_of_two_symbols (void); |
7fa3d080 BW |
7331 | static void xtensa_fix_a0_b_retw_frags (void); |
7332 | static void xtensa_fix_b_j_loop_end_frags (void); | |
7333 | static void xtensa_fix_close_loop_end_frags (void); | |
7334 | static void xtensa_fix_short_loop_frags (void); | |
7335 | static void xtensa_sanity_check (void); | |
2caa7ca0 | 7336 | static void xtensa_add_config_info (void); |
7fa3d080 | 7337 | |
43cd72b9 | 7338 | void |
7fa3d080 | 7339 | xtensa_end (void) |
43cd72b9 BW |
7340 | { |
7341 | directive_balance (); | |
7342 | xtensa_flush_pending_output (); | |
7343 | ||
7344 | past_xtensa_end = TRUE; | |
7345 | ||
7346 | xtensa_move_literals (); | |
7347 | ||
7348 | xtensa_reorder_segments (); | |
7349 | xtensa_cleanup_align_frags (); | |
7350 | xtensa_fix_target_frags (); | |
7351 | if (workaround_a0_b_retw && has_a0_b_retw) | |
7352 | xtensa_fix_a0_b_retw_frags (); | |
7353 | if (workaround_b_j_loop_end) | |
7354 | xtensa_fix_b_j_loop_end_frags (); | |
7355 | ||
7356 | /* "close_loop_end" should be processed BEFORE "short_loop". */ | |
7357 | if (workaround_close_loop_end && maybe_has_close_loop_end) | |
7358 | xtensa_fix_close_loop_end_frags (); | |
7359 | ||
7360 | if (workaround_short_loop && maybe_has_short_loop) | |
7361 | xtensa_fix_short_loop_frags (); | |
03aaa593 BW |
7362 | if (align_targets) |
7363 | xtensa_mark_narrow_branches (); | |
43cd72b9 BW |
7364 | xtensa_mark_zcl_first_insns (); |
7365 | ||
7366 | xtensa_sanity_check (); | |
2caa7ca0 BW |
7367 | |
7368 | xtensa_add_config_info (); | |
a82c7d90 DW |
7369 | |
7370 | xtensa_check_frag_count (); | |
43cd72b9 BW |
7371 | } |
7372 | ||
148d6384 MF |
7373 | struct trampoline_chain_entry |
7374 | { | |
7375 | symbolS *sym; | |
7376 | addressT offset; | |
7377 | }; | |
7378 | ||
7379 | /* Trampoline chain for a given (sym, offset) pair is a sorted array | |
7380 | of locations of trampoline jumps leading there. Jumps are represented | |
7381 | as pairs (sym, offset): trampoline frag symbol and offset of the jump | |
7382 | inside the frag. */ | |
7383 | struct trampoline_chain | |
7384 | { | |
7385 | struct trampoline_chain_entry target; | |
7386 | struct trampoline_chain_entry *entry; | |
7387 | size_t n_entries; | |
7388 | size_t n_max; | |
7389 | bfd_boolean needs_sorting; | |
7390 | }; | |
7391 | ||
7392 | struct trampoline_chain_index | |
7393 | { | |
7394 | struct trampoline_chain *entry; | |
7395 | size_t n_entries; | |
7396 | size_t n_max; | |
7397 | bfd_boolean needs_sorting; | |
7398 | }; | |
7399 | ||
fe6c2f1b MF |
7400 | struct trampoline_index |
7401 | { | |
7402 | fragS **entry; | |
7403 | size_t n_entries; | |
7404 | size_t n_max; | |
7405 | }; | |
43cd72b9 | 7406 | |
a82c7d90 DW |
7407 | struct trampoline_seg |
7408 | { | |
7409 | struct trampoline_seg *next; | |
7410 | asection *seg; | |
148d6384 | 7411 | /* Trampolines ordered by their frag fr_address */ |
fe6c2f1b | 7412 | struct trampoline_index index; |
148d6384 MF |
7413 | /* Known trampoline chains ordered by (sym, offset) pair */ |
7414 | struct trampoline_chain_index chain_index; | |
a82c7d90 DW |
7415 | }; |
7416 | ||
7417 | static struct trampoline_seg trampoline_seg_list; | |
7418 | #define J_RANGE (128 * 1024) | |
fe6c2f1b | 7419 | #define J_MARGIN 4096 |
a82c7d90 DW |
7420 | |
7421 | static int unreachable_count = 0; | |
7422 | ||
7423 | ||
7424 | static void | |
7425 | xtensa_maybe_create_trampoline_frag (void) | |
7426 | { | |
7427 | if (!use_trampolines) | |
7428 | return; | |
7429 | ||
7430 | /* We create an area for possible trampolines every 10 unreachable frags. | |
7431 | These are preferred over the ones not preceded by an unreachable frag, | |
7432 | because we don't have to jump around them. This function is called after | |
7433 | each RELAX_UNREACHABLE frag is created. */ | |
7434 | ||
7435 | if (++unreachable_count > 10) | |
7436 | { | |
7437 | xtensa_create_trampoline_frag (FALSE); | |
7438 | clear_frag_count (); | |
7439 | unreachable_count = 0; | |
7440 | } | |
7441 | } | |
7442 | ||
7443 | static void | |
7444 | xtensa_check_frag_count (void) | |
7445 | { | |
7446 | if (!use_trampolines || frag_now->tc_frag_data.is_no_transform) | |
7447 | return; | |
7448 | ||
7449 | /* We create an area for possible trampolines every 8000 frags or so. This | |
7450 | is an estimate based on the max range of a "j" insn (+/-128K) divided | |
7451 | by a typical frag byte count (16), minus a few for safety. This function | |
7452 | is called after each source line is processed. */ | |
7453 | ||
7454 | if (get_frag_count () > 8000) | |
7455 | { | |
7456 | xtensa_create_trampoline_frag (TRUE); | |
7457 | clear_frag_count (); | |
7458 | unreachable_count = 0; | |
7459 | } | |
b46824bd MF |
7460 | |
7461 | /* We create an area for a possible literal pool every N (default 5000) | |
7462 | frags or so. */ | |
7463 | xtensa_maybe_create_literal_pool_frag (TRUE, TRUE); | |
a82c7d90 DW |
7464 | } |
7465 | ||
7466 | static xtensa_insnbuf trampoline_buf = NULL; | |
7467 | static xtensa_insnbuf trampoline_slotbuf = NULL; | |
7468 | ||
b46824bd MF |
7469 | static xtensa_insnbuf litpool_buf = NULL; |
7470 | static xtensa_insnbuf litpool_slotbuf = NULL; | |
7471 | ||
a82c7d90 DW |
7472 | #define TRAMPOLINE_FRAG_SIZE 3000 |
7473 | ||
1c2649f5 MF |
7474 | static struct trampoline_seg * |
7475 | find_trampoline_seg (asection *seg) | |
7476 | { | |
7477 | struct trampoline_seg *ts = trampoline_seg_list.next; | |
407e1140 MF |
7478 | static struct trampoline_seg *mr; |
7479 | ||
7480 | if (mr && mr->seg == seg) | |
7481 | return mr; | |
1c2649f5 MF |
7482 | |
7483 | for ( ; ts; ts = ts->next) | |
7484 | { | |
7485 | if (ts->seg == seg) | |
407e1140 MF |
7486 | { |
7487 | mr = ts; | |
7488 | return ts; | |
7489 | } | |
1c2649f5 MF |
7490 | } |
7491 | ||
7492 | return NULL; | |
7493 | } | |
7494 | ||
fe6c2f1b MF |
7495 | static size_t xg_find_trampoline (const struct trampoline_index *idx, |
7496 | addressT addr) | |
7497 | { | |
7498 | size_t a = 0; | |
7499 | size_t b = idx->n_entries; | |
7500 | ||
7501 | while (b - a > 1) | |
7502 | { | |
7503 | size_t c = (a + b) / 2; | |
7504 | ||
7505 | if (idx->entry[c]->fr_address <= addr) | |
7506 | a = c; | |
7507 | else | |
7508 | b = c; | |
7509 | } | |
7510 | return a; | |
7511 | } | |
7512 | ||
7513 | static void xg_add_trampoline_to_index (struct trampoline_index *idx, | |
7514 | fragS *fragP) | |
7515 | { | |
7516 | if (idx->n_entries == idx->n_max) | |
7517 | { | |
7518 | idx->n_max = (idx->n_entries + 1) * 2; | |
7519 | idx->entry = xrealloc (idx->entry, | |
7520 | sizeof (*idx->entry) * idx->n_max); | |
7521 | } | |
7522 | idx->entry[idx->n_entries] = fragP; | |
7523 | ++idx->n_entries; | |
7524 | } | |
7525 | ||
7526 | static void xg_remove_trampoline_from_index (struct trampoline_index *idx, | |
7527 | size_t i) | |
7528 | { | |
7529 | gas_assert (i < idx->n_entries); | |
7530 | memmove (idx->entry + i, idx->entry + i + 1, | |
7531 | (idx->n_entries - i - 1) * sizeof (*idx->entry)); | |
7532 | --idx->n_entries; | |
7533 | } | |
7534 | ||
7535 | static void xg_add_trampoline_to_seg (struct trampoline_seg *ts, | |
7536 | fragS *fragP) | |
7537 | { | |
7538 | xg_add_trampoline_to_index (&ts->index, fragP); | |
7539 | } | |
1c2649f5 | 7540 | |
a82c7d90 DW |
7541 | static void |
7542 | xtensa_create_trampoline_frag (bfd_boolean needs_jump_around) | |
7543 | { | |
7544 | /* Emit a frag where we can place intermediate jump instructions, | |
7545 | in case we need to jump farther than 128K bytes. | |
7546 | Each jump instruction takes three bytes. | |
7547 | We allocate enough for 1000 trampolines in each frag. | |
7548 | If that's not enough, oh well. */ | |
7549 | ||
1c2649f5 | 7550 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); |
a82c7d90 DW |
7551 | char *varP; |
7552 | fragS *fragP; | |
7553 | int size = TRAMPOLINE_FRAG_SIZE; | |
7554 | ||
a82c7d90 DW |
7555 | if (ts == NULL) |
7556 | { | |
add39d23 | 7557 | ts = XCNEW(struct trampoline_seg); |
a82c7d90 DW |
7558 | ts->next = trampoline_seg_list.next; |
7559 | trampoline_seg_list.next = ts; | |
7560 | ts->seg = now_seg; | |
7561 | } | |
7562 | ||
7563 | frag_wane (frag_now); | |
7564 | frag_new (0); | |
7565 | xtensa_set_frag_assembly_state (frag_now); | |
7566 | varP = frag_var (rs_machine_dependent, size, size, RELAX_TRAMPOLINE, NULL, 0, NULL); | |
7567 | fragP = (fragS *)(varP - SIZEOF_STRUCT_FRAG); | |
7568 | if (trampoline_buf == NULL) | |
7569 | { | |
7570 | trampoline_buf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
7571 | trampoline_slotbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
7572 | } | |
46888d71 | 7573 | fragP->tc_frag_data.needs_jump_around = needs_jump_around; |
fe6c2f1b | 7574 | xg_add_trampoline_to_seg (ts, fragP); |
a82c7d90 DW |
7575 | } |
7576 | ||
fe6c2f1b MF |
7577 | static bfd_boolean xg_is_trampoline_frag_full (const fragS *fragP) |
7578 | { | |
7579 | return fragP->fr_var < 3; | |
7580 | } | |
a82c7d90 | 7581 | |
148d6384 MF |
7582 | static int xg_order_trampoline_chain_entry (const void *a, const void *b) |
7583 | { | |
7584 | const struct trampoline_chain_entry *pa = a; | |
7585 | const struct trampoline_chain_entry *pb = b; | |
7586 | ||
7587 | if (pa->sym == pb->sym || | |
7588 | S_GET_VALUE (pa->sym) == S_GET_VALUE (pb->sym)) | |
7589 | if (pa->offset == pb->offset) | |
7590 | return 0; | |
7591 | else | |
7592 | return pa->offset < pb->offset ? -1 : 1; | |
7593 | else | |
7594 | return S_GET_VALUE (pa->sym) < S_GET_VALUE (pb->sym) ? -1 : 1; | |
7595 | } | |
7596 | ||
7597 | static void xg_sort_trampoline_chain (struct trampoline_chain *tc) | |
7598 | { | |
7599 | qsort (tc->entry, tc->n_entries, sizeof (*tc->entry), | |
7600 | xg_order_trampoline_chain_entry); | |
7601 | tc->needs_sorting = FALSE; | |
7602 | } | |
7603 | ||
7604 | /* Find entry index in the given chain with maximal address <= source. */ | |
7605 | static size_t xg_find_chain_entry (struct trampoline_chain *tc, | |
7606 | addressT source) | |
7607 | { | |
7608 | size_t a = 0; | |
7609 | size_t b = tc->n_entries; | |
7610 | ||
7611 | if (tc->needs_sorting) | |
7612 | xg_sort_trampoline_chain (tc); | |
7613 | ||
7614 | while (b - a > 1) | |
7615 | { | |
7616 | size_t c = (a + b) / 2; | |
7617 | struct trampoline_chain_entry *e = tc->entry + c; | |
7618 | ||
7619 | if (S_GET_VALUE(e->sym) + e->offset <= source) | |
7620 | a = c; | |
7621 | else | |
7622 | b = c; | |
7623 | } | |
7624 | return a; | |
7625 | } | |
7626 | ||
7627 | /* Find the best jump target for the source in the given trampoline chain. | |
7628 | The best jump target is the one that results in the shortest path to the | |
7629 | final target, it's the location of the jump closest to the final target, | |
7630 | but within the J_RANGE - J_MARGIN from the source. */ | |
7631 | static struct trampoline_chain_entry * | |
7632 | xg_get_best_chain_entry (struct trampoline_chain *tc, addressT source) | |
7633 | { | |
7634 | addressT target = S_GET_VALUE(tc->target.sym) + tc->target.offset; | |
7635 | size_t i = xg_find_chain_entry (tc, source); | |
7636 | struct trampoline_chain_entry *e = tc->entry + i; | |
7637 | int step = target < source ? -1 : 1; | |
7638 | addressT chained_target; | |
7639 | offsetT off; | |
7640 | ||
7641 | if (target > source && | |
7642 | S_GET_VALUE(e->sym) + e->offset <= source && | |
7643 | i + 1 < tc->n_entries) | |
7644 | ++i; | |
7645 | ||
7646 | while (i + step < tc->n_entries) | |
7647 | { | |
7648 | struct trampoline_chain_entry *next = tc->entry + i + step; | |
7649 | ||
7650 | chained_target = S_GET_VALUE(next->sym) + next->offset; | |
7651 | off = source - chained_target; | |
7652 | ||
7653 | if (labs (off) >= J_RANGE - J_MARGIN) | |
7654 | break; | |
7655 | ||
7656 | i += step; | |
7657 | } | |
7658 | ||
7659 | e = tc->entry + i; | |
7660 | chained_target = S_GET_VALUE(e->sym) + e->offset; | |
7661 | off = source - chained_target; | |
7662 | ||
7663 | if (labs (off) < J_MARGIN || | |
7664 | labs (off) >= J_RANGE - J_MARGIN) | |
7665 | return &tc->target; | |
7666 | return tc->entry + i; | |
7667 | } | |
7668 | ||
7669 | static int xg_order_trampoline_chain (const void *a, const void *b) | |
7670 | { | |
10af2a65 MF |
7671 | const struct trampoline_chain *_pa = a; |
7672 | const struct trampoline_chain *_pb = b; | |
7673 | const struct trampoline_chain_entry *pa = &_pa->target; | |
7674 | const struct trampoline_chain_entry *pb = &_pb->target; | |
7675 | symbolS *s1 = pa->sym; | |
7676 | symbolS *s2 = pb->sym; | |
8d1015a8 | 7677 | symbolS *tmp; |
10af2a65 | 7678 | |
8d1015a8 AM |
7679 | tmp = symbol_symbolS (s1); |
7680 | if (tmp) | |
7681 | s1 = tmp; | |
10af2a65 | 7682 | |
8d1015a8 AM |
7683 | tmp = symbol_symbolS (s2); |
7684 | if (tmp) | |
7685 | s2 = tmp; | |
10af2a65 MF |
7686 | |
7687 | if (s1 == s2) | |
7688 | if (pa->offset == pb->offset) | |
7689 | return 0; | |
7690 | else | |
7691 | return pa->offset < pb->offset ? -1 : 1; | |
7692 | else | |
7693 | return s1 < s2 ? -1 : 1; | |
148d6384 MF |
7694 | } |
7695 | ||
7696 | static struct trampoline_chain * | |
7697 | xg_get_trampoline_chain (struct trampoline_seg *ts, | |
7698 | symbolS *sym, | |
7699 | addressT offset) | |
7700 | { | |
7701 | struct trampoline_chain_index *idx = &ts->chain_index; | |
7702 | struct trampoline_chain c; | |
7703 | ||
7704 | if (idx->needs_sorting) | |
7705 | { | |
7706 | qsort (idx->entry, idx->n_entries, sizeof (*idx->entry), | |
7707 | xg_order_trampoline_chain); | |
7708 | idx->needs_sorting = FALSE; | |
7709 | } | |
7710 | c.target.sym = sym; | |
7711 | c.target.offset = offset; | |
7712 | return bsearch (&c, idx->entry, idx->n_entries, | |
7713 | sizeof (struct trampoline_chain), | |
7714 | xg_order_trampoline_chain); | |
7715 | } | |
7716 | ||
7717 | /* Find trampoline chain in the given trampoline segment that is going | |
7718 | to the *sym + *offset. If found, replace *sym and *offset with the | |
7719 | best jump target in that chain. */ | |
7720 | static struct trampoline_chain * | |
7721 | xg_find_best_eq_target (struct trampoline_seg *ts, | |
7722 | addressT source, symbolS **sym, | |
7723 | addressT *offset) | |
7724 | { | |
7725 | struct trampoline_chain *tc = xg_get_trampoline_chain (ts, *sym, *offset); | |
7726 | ||
7727 | if (tc) | |
7728 | { | |
7729 | struct trampoline_chain_entry *e = xg_get_best_chain_entry (tc, source); | |
7730 | ||
7731 | *sym = e->sym; | |
7732 | *offset = e->offset; | |
7733 | } | |
7734 | return tc; | |
7735 | } | |
7736 | ||
7737 | static void xg_add_location_to_chain (struct trampoline_chain *tc, | |
7738 | symbolS *sym, addressT offset) | |
7739 | { | |
7740 | struct trampoline_chain_entry *e; | |
7741 | ||
7742 | if (tc->n_entries == tc->n_max) | |
7743 | { | |
7744 | tc->n_max = (tc->n_max + 1) * 2; | |
7745 | tc->entry = xrealloc (tc->entry, sizeof (*tc->entry) * tc->n_max); | |
7746 | } | |
7747 | e = tc->entry + tc->n_entries; | |
7748 | e->sym = sym; | |
7749 | e->offset = offset; | |
7750 | ++tc->n_entries; | |
7751 | tc->needs_sorting = TRUE; | |
7752 | } | |
7753 | ||
7754 | static struct trampoline_chain * | |
7755 | xg_create_trampoline_chain (struct trampoline_seg *ts, | |
7756 | symbolS *sym, addressT offset) | |
7757 | { | |
7758 | struct trampoline_chain_index *idx = &ts->chain_index; | |
7759 | struct trampoline_chain *tc; | |
7760 | ||
7761 | if (idx->n_entries == idx->n_max) | |
7762 | { | |
7763 | idx->n_max = (idx->n_max + 1) * 2; | |
7764 | idx->entry = xrealloc (idx->entry, | |
7765 | sizeof (*idx->entry) * idx->n_max); | |
7766 | } | |
7767 | ||
7768 | tc = idx->entry + idx->n_entries; | |
7769 | tc->target.sym = sym; | |
7770 | tc->target.offset = offset; | |
7771 | tc->entry = NULL; | |
7772 | tc->n_entries = 0; | |
7773 | tc->n_max = 0; | |
7774 | xg_add_location_to_chain (tc, sym, offset); | |
7775 | ||
7776 | ++idx->n_entries; | |
7777 | idx->needs_sorting = TRUE; | |
7778 | ||
7779 | return tc; | |
7780 | } | |
7781 | ||
a82c7d90 DW |
7782 | void dump_trampolines (void); |
7783 | ||
7784 | void | |
7785 | dump_trampolines (void) | |
7786 | { | |
7787 | struct trampoline_seg *ts = trampoline_seg_list.next; | |
7788 | ||
7789 | for ( ; ts; ts = ts->next) | |
7790 | { | |
fe6c2f1b | 7791 | size_t i; |
a82c7d90 DW |
7792 | asection *seg = ts->seg; |
7793 | ||
7794 | if (seg == NULL) | |
7795 | continue; | |
7796 | fprintf(stderr, "SECTION %s\n", seg->name); | |
fe6c2f1b MF |
7797 | |
7798 | for (i = 0; i < ts->index.n_entries; ++i) | |
a82c7d90 | 7799 | { |
fe6c2f1b MF |
7800 | fragS *tf = ts->index.entry[i]; |
7801 | ||
a82c7d90 | 7802 | fprintf(stderr, " 0x%08x: fix=%d, jump_around=%s\n", |
46888d71 MF |
7803 | (int)tf->fr_address, (int)tf->fr_fix, |
7804 | tf->tc_frag_data.needs_jump_around ? "T" : "F"); | |
a82c7d90 DW |
7805 | } |
7806 | } | |
7807 | } | |
7808 | ||
b46824bd MF |
7809 | static void dump_litpools (void) __attribute__ ((unused)); |
7810 | ||
7811 | static void | |
7812 | dump_litpools (void) | |
7813 | { | |
7814 | struct litpool_seg *lps = litpool_seg_list.next; | |
7815 | struct litpool_frag *lpf; | |
7816 | ||
7817 | for ( ; lps ; lps = lps->next ) | |
7818 | { | |
7819 | printf("litpool seg %s\n", lps->seg->name); | |
7820 | for ( lpf = lps->frag_list.next; lpf->fragP; lpf = lpf->next ) | |
7821 | { | |
7822 | fragS *litfrag = lpf->fragP->fr_next; | |
7823 | int count = 0; | |
7824 | while (litfrag && litfrag->fr_subtype != RELAX_LITERAL_POOL_END) | |
7825 | { | |
7826 | if (litfrag->fr_fix == 4) | |
7827 | count++; | |
7828 | litfrag = litfrag->fr_next; | |
7829 | } | |
7830 | printf(" %ld <%d:%d> (%d) [%d]: ", | |
7831 | lpf->addr, lpf->priority, lpf->original_priority, | |
7832 | lpf->fragP->fr_line, count); | |
7833 | //dump_frag(lpf->fragP); | |
7834 | } | |
7835 | } | |
7836 | } | |
7837 | ||
7838 | static void | |
7839 | xtensa_maybe_create_literal_pool_frag (bfd_boolean create, | |
7840 | bfd_boolean only_if_needed) | |
7841 | { | |
7842 | struct litpool_seg *lps = litpool_seg_list.next; | |
7843 | fragS *fragP; | |
7844 | struct litpool_frag *lpf; | |
7845 | bfd_boolean needed = FALSE; | |
7846 | ||
7847 | if (use_literal_section || !auto_litpools) | |
7848 | return; | |
7849 | ||
7850 | for ( ; lps ; lps = lps->next ) | |
7851 | { | |
7852 | if (lps->seg == now_seg) | |
7853 | break; | |
7854 | } | |
7855 | ||
7856 | if (lps == NULL) | |
7857 | { | |
add39d23 | 7858 | lps = XCNEW (struct litpool_seg); |
b46824bd MF |
7859 | lps->next = litpool_seg_list.next; |
7860 | litpool_seg_list.next = lps; | |
7861 | lps->seg = now_seg; | |
7862 | lps->frag_list.next = &lps->frag_list; | |
7863 | lps->frag_list.prev = &lps->frag_list; | |
947fa914 MF |
7864 | /* Put candidate literal pool at the beginning of every section, |
7865 | so that even when section starts with literal load there's a | |
7866 | literal pool available. */ | |
7867 | lps->frag_count = auto_litpool_limit; | |
b46824bd MF |
7868 | } |
7869 | ||
7870 | lps->frag_count++; | |
7871 | ||
7872 | if (create) | |
7873 | { | |
7874 | if (only_if_needed) | |
7875 | { | |
7876 | if (past_xtensa_end || !use_transform() || | |
7877 | frag_now->tc_frag_data.is_no_transform) | |
7878 | { | |
7879 | return; | |
7880 | } | |
7881 | if (auto_litpool_limit <= 0) | |
7882 | { | |
7883 | /* Don't create a litpool based only on frag count. */ | |
7884 | return; | |
7885 | } | |
7886 | else if (lps->frag_count > auto_litpool_limit) | |
7887 | { | |
7888 | needed = TRUE; | |
7889 | } | |
7890 | else | |
7891 | { | |
7892 | return; | |
7893 | } | |
7894 | } | |
7895 | else | |
7896 | { | |
7897 | needed = TRUE; | |
7898 | } | |
7899 | } | |
7900 | ||
7901 | if (needed) | |
7902 | { | |
7903 | int size = (only_if_needed) ? 3 : 0; /* Space for a "j" insn. */ | |
7904 | /* Create a potential site for a literal pool. */ | |
7905 | frag_wane (frag_now); | |
7906 | frag_new (0); | |
7907 | xtensa_set_frag_assembly_state (frag_now); | |
7908 | fragP = frag_now; | |
7909 | fragP->tc_frag_data.lit_frchain = frchain_now; | |
7910 | fragP->tc_frag_data.literal_frag = fragP; | |
7911 | frag_var (rs_machine_dependent, size, size, | |
7912 | (only_if_needed) ? | |
7913 | RELAX_LITERAL_POOL_CANDIDATE_BEGIN : | |
7914 | RELAX_LITERAL_POOL_BEGIN, | |
7915 | NULL, 0, NULL); | |
7916 | frag_now->tc_frag_data.lit_seg = now_seg; | |
7917 | frag_variant (rs_machine_dependent, 0, 0, | |
7918 | RELAX_LITERAL_POOL_END, NULL, 0, NULL); | |
7919 | xtensa_set_frag_assembly_state (frag_now); | |
7920 | } | |
7921 | else | |
7922 | { | |
7923 | /* RELAX_LITERAL_POOL_BEGIN frag is being created; | |
7924 | just record it here. */ | |
7925 | fragP = frag_now; | |
7926 | } | |
7927 | ||
325801bd | 7928 | lpf = XNEW (struct litpool_frag); |
b46824bd MF |
7929 | /* Insert at tail of circular list. */ |
7930 | lpf->addr = 0; | |
7931 | lps->frag_list.prev->next = lpf; | |
7932 | lpf->next = &lps->frag_list; | |
7933 | lpf->prev = lps->frag_list.prev; | |
7934 | lps->frag_list.prev = lpf; | |
7935 | lpf->fragP = fragP; | |
7936 | lpf->priority = (needed) ? (only_if_needed) ? 3 : 2 : 1; | |
7937 | lpf->original_priority = lpf->priority; | |
cd665a94 | 7938 | lpf->literal_count = 0; |
b46824bd MF |
7939 | |
7940 | lps->frag_count = 0; | |
7941 | } | |
7942 | ||
43cd72b9 | 7943 | static void |
7fa3d080 | 7944 | xtensa_cleanup_align_frags (void) |
43cd72b9 BW |
7945 | { |
7946 | frchainS *frchP; | |
c9049d30 | 7947 | asection *s; |
43cd72b9 | 7948 | |
c9049d30 AM |
7949 | for (s = stdoutput->sections; s; s = s->next) |
7950 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7951 | { | |
7952 | fragS *fragP; | |
7953 | /* Walk over all of the fragments in a subsection. */ | |
7954 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7955 | { | |
7956 | if ((fragP->fr_type == rs_align | |
7957 | || fragP->fr_type == rs_align_code | |
7958 | || (fragP->fr_type == rs_machine_dependent | |
7959 | && (fragP->fr_subtype == RELAX_DESIRE_ALIGN | |
7960 | || fragP->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET))) | |
7961 | && fragP->fr_fix == 0) | |
7962 | { | |
7963 | fragS *next = fragP->fr_next; | |
7964 | ||
7965 | while (next | |
7966 | && next->fr_fix == 0 | |
7967 | && next->fr_type == rs_machine_dependent | |
7968 | && next->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET) | |
7969 | { | |
7970 | frag_wane (next); | |
7971 | next = next->fr_next; | |
7972 | } | |
7973 | } | |
7974 | /* If we don't widen branch targets, then they | |
7975 | will be easier to align. */ | |
7976 | if (fragP->tc_frag_data.is_branch_target | |
7977 | && fragP->fr_opcode == fragP->fr_literal | |
7978 | && fragP->fr_type == rs_machine_dependent | |
7979 | && fragP->fr_subtype == RELAX_SLOTS | |
7980 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
7981 | frag_wane (fragP); | |
7982 | if (fragP->fr_type == rs_machine_dependent | |
7983 | && fragP->fr_subtype == RELAX_UNREACHABLE) | |
7984 | fragP->tc_frag_data.is_unreachable = TRUE; | |
7985 | } | |
7986 | } | |
43cd72b9 BW |
7987 | } |
7988 | ||
7989 | ||
7990 | /* Re-process all of the fragments looking to convert all of the | |
7991 | RELAX_DESIRE_ALIGN_IF_TARGET fragments. If there is a branch | |
7992 | target in the next fragment, convert this to RELAX_DESIRE_ALIGN. | |
7b1cc377 | 7993 | Otherwise, convert to a .fill 0. */ |
7fa3d080 | 7994 | |
43cd72b9 | 7995 | static void |
7fa3d080 | 7996 | xtensa_fix_target_frags (void) |
e0001a05 NC |
7997 | { |
7998 | frchainS *frchP; | |
c9049d30 | 7999 | asection *s; |
e0001a05 NC |
8000 | |
8001 | /* When this routine is called, all of the subsections are still intact | |
8002 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8003 | for (s = stdoutput->sections; s; s = s->next) |
8004 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8005 | { | |
8006 | fragS *fragP; | |
e0001a05 | 8007 | |
c9049d30 AM |
8008 | /* Walk over all of the fragments in a subsection. */ |
8009 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8010 | { | |
8011 | if (fragP->fr_type == rs_machine_dependent | |
8012 | && fragP->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET) | |
8013 | { | |
8014 | if (next_frag_is_branch_target (fragP)) | |
8015 | fragP->fr_subtype = RELAX_DESIRE_ALIGN; | |
8016 | else | |
8017 | frag_wane (fragP); | |
8018 | } | |
8019 | } | |
8020 | } | |
e0001a05 NC |
8021 | } |
8022 | ||
8023 | ||
7fa3d080 BW |
8024 | static bfd_boolean is_narrow_branch_guaranteed_in_range (fragS *, TInsn *); |
8025 | ||
43cd72b9 | 8026 | static void |
7fa3d080 | 8027 | xtensa_mark_narrow_branches (void) |
43cd72b9 BW |
8028 | { |
8029 | frchainS *frchP; | |
c9049d30 | 8030 | asection *s; |
43cd72b9 | 8031 | |
c9049d30 AM |
8032 | for (s = stdoutput->sections; s; s = s->next) |
8033 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8034 | { | |
8035 | fragS *fragP; | |
8036 | /* Walk over all of the fragments in a subsection. */ | |
8037 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8038 | { | |
8039 | if (fragP->fr_type == rs_machine_dependent | |
8040 | && fragP->fr_subtype == RELAX_SLOTS | |
8041 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED) | |
8042 | { | |
8043 | vliw_insn vinsn; | |
8044 | ||
8045 | vinsn_from_chars (&vinsn, fragP->fr_opcode); | |
8046 | tinsn_immed_from_frag (&vinsn.slots[0], fragP, 0); | |
8047 | ||
8048 | if (vinsn.num_slots == 1 | |
8049 | && xtensa_opcode_is_branch (xtensa_default_isa, | |
64b607e6 | 8050 | vinsn.slots[0].opcode) == 1 |
c9049d30 AM |
8051 | && xg_get_single_size (vinsn.slots[0].opcode) == 2 |
8052 | && is_narrow_branch_guaranteed_in_range (fragP, | |
8053 | &vinsn.slots[0])) | |
8054 | { | |
8055 | fragP->fr_subtype = RELAX_SLOTS; | |
8056 | fragP->tc_frag_data.slot_subtypes[0] = RELAX_NARROW; | |
8057 | fragP->tc_frag_data.is_aligning_branch = 1; | |
8058 | } | |
8059 | } | |
8060 | } | |
8061 | } | |
43cd72b9 BW |
8062 | } |
8063 | ||
8064 | ||
8065 | /* A branch is typically widened only when its target is out of | |
8066 | range. However, we would like to widen them to align a subsequent | |
8067 | branch target when possible. | |
8068 | ||
8069 | Because the branch relaxation code is so convoluted, the optimal solution | |
8070 | (combining the two cases) is difficult to get right in all circumstances. | |
8071 | We therefore go with an "almost as good" solution, where we only | |
8072 | use for alignment narrow branches that definitely will not expand to a | |
8073 | jump and a branch. These functions find and mark these cases. */ | |
8074 | ||
a67517f4 BW |
8075 | /* The range in bytes of BNEZ.N and BEQZ.N. The target operand is encoded |
8076 | as PC + 4 + imm6, where imm6 is a 6-bit immediate ranging from 0 to 63. | |
8077 | We start counting beginning with the frag after the 2-byte branch, so the | |
8078 | maximum offset is (4 - 2) + 63 = 65. */ | |
8079 | #define MAX_IMMED6 65 | |
43cd72b9 | 8080 | |
d77b99c9 | 8081 | static offsetT unrelaxed_frag_max_size (fragS *); |
7fa3d080 | 8082 | |
43cd72b9 | 8083 | static bfd_boolean |
7fa3d080 | 8084 | is_narrow_branch_guaranteed_in_range (fragS *fragP, TInsn *tinsn) |
43cd72b9 | 8085 | { |
91d6fa6a NC |
8086 | const expressionS *exp = &tinsn->tok[1]; |
8087 | symbolS *symbolP = exp->X_add_symbol; | |
8088 | offsetT max_distance = exp->X_add_number; | |
e7da6241 BW |
8089 | fragS *target_frag; |
8090 | ||
91d6fa6a | 8091 | if (exp->X_op != O_symbol) |
e7da6241 BW |
8092 | return FALSE; |
8093 | ||
8094 | target_frag = symbol_get_frag (symbolP); | |
8095 | ||
43cd72b9 BW |
8096 | max_distance += (S_GET_VALUE (symbolP) - target_frag->fr_address); |
8097 | if (is_branch_jmp_to_next (tinsn, fragP)) | |
8098 | return FALSE; | |
8099 | ||
8100 | /* The branch doesn't branch over it's own frag, | |
8101 | but over the subsequent ones. */ | |
8102 | fragP = fragP->fr_next; | |
8103 | while (fragP != NULL && fragP != target_frag && max_distance <= MAX_IMMED6) | |
8104 | { | |
8105 | max_distance += unrelaxed_frag_max_size (fragP); | |
8106 | fragP = fragP->fr_next; | |
8107 | } | |
8108 | if (max_distance <= MAX_IMMED6 && fragP == target_frag) | |
8109 | return TRUE; | |
e0001a05 NC |
8110 | return FALSE; |
8111 | } | |
8112 | ||
8113 | ||
43cd72b9 | 8114 | static void |
7fa3d080 | 8115 | xtensa_mark_zcl_first_insns (void) |
43cd72b9 BW |
8116 | { |
8117 | frchainS *frchP; | |
c9049d30 | 8118 | asection *s; |
43cd72b9 | 8119 | |
c9049d30 AM |
8120 | for (s = stdoutput->sections; s; s = s->next) |
8121 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8122 | { | |
8123 | fragS *fragP; | |
8124 | /* Walk over all of the fragments in a subsection. */ | |
8125 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8126 | { | |
8127 | if (fragP->fr_type == rs_machine_dependent | |
8128 | && (fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE | |
8129 | || fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE)) | |
8130 | { | |
8131 | /* Find the loop frag. */ | |
3a1e9c4a | 8132 | fragS *loop_frag = next_non_empty_frag (fragP); |
c9049d30 | 8133 | /* Find the first insn frag. */ |
3a1e9c4a SA |
8134 | fragS *targ_frag = next_non_empty_frag (loop_frag); |
8135 | ||
8136 | /* Handle a corner case that comes up in hardware | |
8137 | diagnostics. The original assembly looks like this: | |
3739860c | 8138 | |
3a1e9c4a SA |
8139 | loop aX, LabelA |
8140 | <empty_frag>--not found by next_non_empty_frag | |
8141 | loop aY, LabelB | |
8142 | ||
8143 | Depending on the start address, the assembler may or | |
8144 | may not change it to look something like this: | |
8145 | ||
8146 | loop aX, LabelA | |
8147 | nop--frag isn't empty anymore | |
8148 | loop aY, LabelB | |
8149 | ||
8150 | So set up to check the alignment of the nop if it | |
8151 | exists */ | |
8152 | while (loop_frag != targ_frag) | |
8153 | { | |
8154 | if (loop_frag->fr_type == rs_machine_dependent | |
8155 | && (loop_frag->fr_subtype == RELAX_ALIGN_NEXT_OPCODE | |
3739860c | 8156 | || loop_frag->fr_subtype |
3a1e9c4a SA |
8157 | == RELAX_CHECK_ALIGN_NEXT_OPCODE)) |
8158 | targ_frag = loop_frag; | |
8159 | else | |
8160 | loop_frag = loop_frag->fr_next; | |
8161 | } | |
c9049d30 AM |
8162 | |
8163 | /* Of course, sometimes (mostly for toy test cases) a | |
8164 | zero-cost loop instruction is the last in a section. */ | |
8165 | if (targ_frag) | |
8166 | { | |
8167 | targ_frag->tc_frag_data.is_first_loop_insn = TRUE; | |
8168 | /* Do not widen a frag that is the first instruction of a | |
8169 | zero-cost loop. It makes that loop harder to align. */ | |
8170 | if (targ_frag->fr_type == rs_machine_dependent | |
8171 | && targ_frag->fr_subtype == RELAX_SLOTS | |
8172 | && (targ_frag->tc_frag_data.slot_subtypes[0] | |
8173 | == RELAX_NARROW)) | |
8174 | { | |
8175 | if (targ_frag->tc_frag_data.is_aligning_branch) | |
8176 | targ_frag->tc_frag_data.slot_subtypes[0] = RELAX_IMMED; | |
8177 | else | |
8178 | { | |
8179 | frag_wane (targ_frag); | |
8180 | targ_frag->tc_frag_data.slot_subtypes[0] = 0; | |
8181 | } | |
8182 | } | |
8183 | } | |
8184 | if (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE) | |
8185 | frag_wane (fragP); | |
8186 | } | |
8187 | } | |
8188 | } | |
43cd72b9 BW |
8189 | } |
8190 | ||
8191 | ||
fb227da0 BW |
8192 | /* When a difference-of-symbols expression is encoded as a uleb128 or |
8193 | sleb128 value, the linker is unable to adjust that value to account for | |
8194 | link-time relaxation. Mark all the code between such symbols so that | |
8195 | its size cannot be changed by linker relaxation. */ | |
3739860c | 8196 | |
6a7eedfe BW |
8197 | static void |
8198 | xtensa_mark_difference_of_two_symbols (void) | |
8199 | { | |
8200 | symbolS *expr_sym; | |
8201 | ||
3739860c | 8202 | for (expr_sym = expr_symbols; expr_sym; |
6a7eedfe BW |
8203 | expr_sym = symbol_get_tc (expr_sym)->next_expr_symbol) |
8204 | { | |
91d6fa6a | 8205 | expressionS *exp = symbol_get_value_expression (expr_sym); |
6a7eedfe | 8206 | |
91d6fa6a | 8207 | if (exp->X_op == O_subtract) |
6a7eedfe | 8208 | { |
91d6fa6a NC |
8209 | symbolS *left = exp->X_add_symbol; |
8210 | symbolS *right = exp->X_op_symbol; | |
3739860c | 8211 | |
6a7eedfe BW |
8212 | /* Difference of two symbols not in the same section |
8213 | are handled with relocations in the linker. */ | |
8214 | if (S_GET_SEGMENT (left) == S_GET_SEGMENT (right)) | |
8215 | { | |
8216 | fragS *start; | |
8217 | fragS *end; | |
983f90e3 | 8218 | fragS *walk; |
6a7eedfe | 8219 | |
3739860c | 8220 | if (symbol_get_frag (left)->fr_address |
6a7eedfe BW |
8221 | <= symbol_get_frag (right)->fr_address) |
8222 | { | |
8223 | start = symbol_get_frag (left); | |
8224 | end = symbol_get_frag (right); | |
8225 | } | |
8226 | else | |
8227 | { | |
8228 | start = symbol_get_frag (right); | |
8229 | end = symbol_get_frag (left); | |
8230 | } | |
983f90e3 SA |
8231 | |
8232 | if (start->tc_frag_data.no_transform_end != NULL) | |
8233 | walk = start->tc_frag_data.no_transform_end; | |
8234 | else | |
8235 | walk = start; | |
3739860c | 8236 | do |
6a7eedfe | 8237 | { |
983f90e3 SA |
8238 | walk->tc_frag_data.is_no_transform = 1; |
8239 | walk = walk->fr_next; | |
6a7eedfe | 8240 | } |
983f90e3 SA |
8241 | while (walk && walk->fr_address < end->fr_address); |
8242 | ||
8243 | start->tc_frag_data.no_transform_end = walk; | |
6a7eedfe BW |
8244 | } |
8245 | } | |
8246 | } | |
8247 | } | |
8248 | ||
8249 | ||
e0001a05 NC |
8250 | /* Re-process all of the fragments looking to convert all of the |
8251 | RELAX_ADD_NOP_IF_A0_B_RETW. If the next instruction is a | |
8252 | conditional branch or a retw/retw.n, convert this frag to one that | |
8253 | will generate a NOP. In any case close it off with a .fill 0. */ | |
8254 | ||
7fa3d080 BW |
8255 | static bfd_boolean next_instrs_are_b_retw (fragS *); |
8256 | ||
e0001a05 | 8257 | static void |
7fa3d080 | 8258 | xtensa_fix_a0_b_retw_frags (void) |
e0001a05 NC |
8259 | { |
8260 | frchainS *frchP; | |
c9049d30 | 8261 | asection *s; |
e0001a05 NC |
8262 | |
8263 | /* When this routine is called, all of the subsections are still intact | |
8264 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8265 | for (s = stdoutput->sections; s; s = s->next) |
8266 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8267 | { | |
8268 | fragS *fragP; | |
e0001a05 | 8269 | |
c9049d30 AM |
8270 | /* Walk over all of the fragments in a subsection. */ |
8271 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8272 | { | |
8273 | if (fragP->fr_type == rs_machine_dependent | |
8274 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_A0_B_RETW) | |
8275 | { | |
8276 | if (next_instrs_are_b_retw (fragP)) | |
8277 | { | |
8278 | if (fragP->tc_frag_data.is_no_transform) | |
8279 | as_bad (_("instruction sequence (write a0, branch, retw) may trigger hardware errata")); | |
8280 | else | |
8281 | relax_frag_add_nop (fragP); | |
8282 | } | |
8283 | frag_wane (fragP); | |
8284 | } | |
8285 | } | |
8286 | } | |
e0001a05 NC |
8287 | } |
8288 | ||
8289 | ||
7fa3d080 BW |
8290 | static bfd_boolean |
8291 | next_instrs_are_b_retw (fragS *fragP) | |
e0001a05 NC |
8292 | { |
8293 | xtensa_opcode opcode; | |
43cd72b9 | 8294 | xtensa_format fmt; |
e0001a05 NC |
8295 | const fragS *next_fragP = next_non_empty_frag (fragP); |
8296 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 8297 | static xtensa_insnbuf slotbuf = NULL; |
e0001a05 | 8298 | xtensa_isa isa = xtensa_default_isa; |
871a6bd2 | 8299 | unsigned int offset = 0; |
43cd72b9 BW |
8300 | int slot; |
8301 | bfd_boolean branch_seen = FALSE; | |
e0001a05 NC |
8302 | |
8303 | if (!insnbuf) | |
43cd72b9 BW |
8304 | { |
8305 | insnbuf = xtensa_insnbuf_alloc (isa); | |
8306 | slotbuf = xtensa_insnbuf_alloc (isa); | |
8307 | } | |
e0001a05 NC |
8308 | |
8309 | if (next_fragP == NULL) | |
8310 | return FALSE; | |
8311 | ||
8312 | /* Check for the conditional branch. */ | |
d77b99c9 BW |
8313 | xtensa_insnbuf_from_chars |
8314 | (isa, insnbuf, (unsigned char *) &next_fragP->fr_literal[offset], 0); | |
43cd72b9 BW |
8315 | fmt = xtensa_format_decode (isa, insnbuf); |
8316 | if (fmt == XTENSA_UNDEFINED) | |
8317 | return FALSE; | |
8318 | ||
8319 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
8320 | { | |
8321 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
8322 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
8323 | ||
8324 | branch_seen = (branch_seen | |
8325 | || xtensa_opcode_is_branch (isa, opcode) == 1); | |
8326 | } | |
e0001a05 | 8327 | |
43cd72b9 | 8328 | if (!branch_seen) |
e0001a05 NC |
8329 | return FALSE; |
8330 | ||
43cd72b9 | 8331 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8332 | if (offset == next_fragP->fr_fix) |
8333 | { | |
8334 | next_fragP = next_non_empty_frag (next_fragP); | |
8335 | offset = 0; | |
8336 | } | |
43cd72b9 | 8337 | |
e0001a05 NC |
8338 | if (next_fragP == NULL) |
8339 | return FALSE; | |
8340 | ||
8341 | /* Check for the retw/retw.n. */ | |
d77b99c9 BW |
8342 | xtensa_insnbuf_from_chars |
8343 | (isa, insnbuf, (unsigned char *) &next_fragP->fr_literal[offset], 0); | |
43cd72b9 BW |
8344 | fmt = xtensa_format_decode (isa, insnbuf); |
8345 | ||
8346 | /* Because RETW[.N] is not bundleable, a VLIW bundle here means that we | |
8347 | have no problems. */ | |
8348 | if (fmt == XTENSA_UNDEFINED | |
8349 | || xtensa_format_num_slots (isa, fmt) != 1) | |
8350 | return FALSE; | |
8351 | ||
8352 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
8353 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
e0001a05 | 8354 | |
b08b5071 | 8355 | if (opcode == xtensa_retw_opcode || opcode == xtensa_retw_n_opcode) |
e0001a05 | 8356 | return TRUE; |
43cd72b9 | 8357 | |
e0001a05 NC |
8358 | return FALSE; |
8359 | } | |
8360 | ||
8361 | ||
8362 | /* Re-process all of the fragments looking to convert all of the | |
8363 | RELAX_ADD_NOP_IF_PRE_LOOP_END. If there is one instruction and a | |
8364 | loop end label, convert this frag to one that will generate a NOP. | |
8365 | In any case close it off with a .fill 0. */ | |
8366 | ||
7fa3d080 BW |
8367 | static bfd_boolean next_instr_is_loop_end (fragS *); |
8368 | ||
e0001a05 | 8369 | static void |
7fa3d080 | 8370 | xtensa_fix_b_j_loop_end_frags (void) |
e0001a05 NC |
8371 | { |
8372 | frchainS *frchP; | |
c9049d30 | 8373 | asection *s; |
e0001a05 NC |
8374 | |
8375 | /* When this routine is called, all of the subsections are still intact | |
8376 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8377 | for (s = stdoutput->sections; s; s = s->next) |
8378 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8379 | { | |
8380 | fragS *fragP; | |
e0001a05 | 8381 | |
c9049d30 AM |
8382 | /* Walk over all of the fragments in a subsection. */ |
8383 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8384 | { | |
8385 | if (fragP->fr_type == rs_machine_dependent | |
8386 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_PRE_LOOP_END) | |
8387 | { | |
8388 | if (next_instr_is_loop_end (fragP)) | |
8389 | { | |
8390 | if (fragP->tc_frag_data.is_no_transform) | |
8391 | as_bad (_("branching or jumping to a loop end may trigger hardware errata")); | |
8392 | else | |
8393 | relax_frag_add_nop (fragP); | |
8394 | } | |
8395 | frag_wane (fragP); | |
8396 | } | |
8397 | } | |
8398 | } | |
e0001a05 NC |
8399 | } |
8400 | ||
8401 | ||
7fa3d080 BW |
8402 | static bfd_boolean |
8403 | next_instr_is_loop_end (fragS *fragP) | |
e0001a05 NC |
8404 | { |
8405 | const fragS *next_fragP; | |
8406 | ||
8407 | if (next_frag_is_loop_target (fragP)) | |
8408 | return FALSE; | |
8409 | ||
8410 | next_fragP = next_non_empty_frag (fragP); | |
8411 | if (next_fragP == NULL) | |
8412 | return FALSE; | |
8413 | ||
8414 | if (!next_frag_is_loop_target (next_fragP)) | |
8415 | return FALSE; | |
8416 | ||
8417 | /* If the size is >= 3 then there is more than one instruction here. | |
8418 | The hardware bug will not fire. */ | |
8419 | if (next_fragP->fr_fix > 3) | |
8420 | return FALSE; | |
8421 | ||
8422 | return TRUE; | |
8423 | } | |
8424 | ||
8425 | ||
8426 | /* Re-process all of the fragments looking to convert all of the | |
8427 | RELAX_ADD_NOP_IF_CLOSE_LOOP_END. If there is an loop end that is | |
8428 | not MY loop's loop end within 12 bytes, add enough nops here to | |
8429 | make it at least 12 bytes away. In any case close it off with a | |
8430 | .fill 0. */ | |
8431 | ||
d77b99c9 | 8432 | static offsetT min_bytes_to_other_loop_end |
05d58145 | 8433 | (fragS *, fragS *, offsetT); |
7fa3d080 | 8434 | |
e0001a05 | 8435 | static void |
7fa3d080 | 8436 | xtensa_fix_close_loop_end_frags (void) |
e0001a05 NC |
8437 | { |
8438 | frchainS *frchP; | |
c9049d30 | 8439 | asection *s; |
e0001a05 NC |
8440 | |
8441 | /* When this routine is called, all of the subsections are still intact | |
8442 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8443 | for (s = stdoutput->sections; s; s = s->next) |
8444 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8445 | { | |
8446 | fragS *fragP; | |
e0001a05 | 8447 | |
c9049d30 | 8448 | fragS *current_target = NULL; |
e0001a05 | 8449 | |
c9049d30 AM |
8450 | /* Walk over all of the fragments in a subsection. */ |
8451 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8452 | { | |
8453 | if (fragP->fr_type == rs_machine_dependent | |
8454 | && ((fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE) | |
8455 | || (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE))) | |
05d58145 | 8456 | current_target = symbol_get_frag (fragP->fr_symbol); |
e0001a05 | 8457 | |
c9049d30 AM |
8458 | if (current_target |
8459 | && fragP->fr_type == rs_machine_dependent | |
8460 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_CLOSE_LOOP_END) | |
8461 | { | |
8462 | offsetT min_bytes; | |
8463 | int bytes_added = 0; | |
e0001a05 NC |
8464 | |
8465 | #define REQUIRED_LOOP_DIVIDING_BYTES 12 | |
c9049d30 AM |
8466 | /* Max out at 12. */ |
8467 | min_bytes = min_bytes_to_other_loop_end | |
8468 | (fragP->fr_next, current_target, REQUIRED_LOOP_DIVIDING_BYTES); | |
8469 | ||
8470 | if (min_bytes < REQUIRED_LOOP_DIVIDING_BYTES) | |
8471 | { | |
8472 | if (fragP->tc_frag_data.is_no_transform) | |
8473 | as_bad (_("loop end too close to another loop end may trigger hardware errata")); | |
8474 | else | |
8475 | { | |
8476 | while (min_bytes + bytes_added | |
8477 | < REQUIRED_LOOP_DIVIDING_BYTES) | |
8478 | { | |
8479 | int length = 3; | |
8480 | ||
8481 | if (fragP->fr_var < length) | |
8482 | as_fatal (_("fr_var %lu < length %d"), | |
8483 | (long) fragP->fr_var, length); | |
8484 | else | |
8485 | { | |
8486 | assemble_nop (length, | |
8487 | fragP->fr_literal + fragP->fr_fix); | |
8488 | fragP->fr_fix += length; | |
8489 | fragP->fr_var -= length; | |
8490 | } | |
8491 | bytes_added += length; | |
8492 | } | |
8493 | } | |
8494 | } | |
8495 | frag_wane (fragP); | |
8496 | } | |
9c2799c2 | 8497 | gas_assert (fragP->fr_type != rs_machine_dependent |
c9049d30 AM |
8498 | || fragP->fr_subtype != RELAX_ADD_NOP_IF_CLOSE_LOOP_END); |
8499 | } | |
8500 | } | |
e0001a05 NC |
8501 | } |
8502 | ||
8503 | ||
d77b99c9 | 8504 | static offsetT unrelaxed_frag_min_size (fragS *); |
7fa3d080 | 8505 | |
d77b99c9 | 8506 | static offsetT |
7fa3d080 BW |
8507 | min_bytes_to_other_loop_end (fragS *fragP, |
8508 | fragS *current_target, | |
d77b99c9 | 8509 | offsetT max_size) |
e0001a05 | 8510 | { |
d77b99c9 | 8511 | offsetT offset = 0; |
e0001a05 NC |
8512 | fragS *current_fragP; |
8513 | ||
8514 | for (current_fragP = fragP; | |
8515 | current_fragP; | |
8516 | current_fragP = current_fragP->fr_next) | |
8517 | { | |
8518 | if (current_fragP->tc_frag_data.is_loop_target | |
8519 | && current_fragP != current_target) | |
05d58145 | 8520 | return offset; |
e0001a05 NC |
8521 | |
8522 | offset += unrelaxed_frag_min_size (current_fragP); | |
8523 | ||
05d58145 | 8524 | if (offset >= max_size) |
e0001a05 NC |
8525 | return max_size; |
8526 | } | |
8527 | return max_size; | |
8528 | } | |
8529 | ||
8530 | ||
d77b99c9 | 8531 | static offsetT |
7fa3d080 | 8532 | unrelaxed_frag_min_size (fragS *fragP) |
e0001a05 | 8533 | { |
d77b99c9 | 8534 | offsetT size = fragP->fr_fix; |
e0001a05 | 8535 | |
d77b99c9 | 8536 | /* Add fill size. */ |
e0001a05 NC |
8537 | if (fragP->fr_type == rs_fill) |
8538 | size += fragP->fr_offset; | |
8539 | ||
8540 | return size; | |
8541 | } | |
8542 | ||
8543 | ||
d77b99c9 | 8544 | static offsetT |
7fa3d080 | 8545 | unrelaxed_frag_max_size (fragS *fragP) |
43cd72b9 | 8546 | { |
d77b99c9 | 8547 | offsetT size = fragP->fr_fix; |
43cd72b9 BW |
8548 | switch (fragP->fr_type) |
8549 | { | |
8550 | case 0: | |
c138bc38 | 8551 | /* Empty frags created by the obstack allocation scheme |
43cd72b9 BW |
8552 | end up with type 0. */ |
8553 | break; | |
8554 | case rs_fill: | |
8555 | case rs_org: | |
8556 | case rs_space: | |
8557 | size += fragP->fr_offset; | |
8558 | break; | |
8559 | case rs_align: | |
8560 | case rs_align_code: | |
8561 | case rs_align_test: | |
8562 | case rs_leb128: | |
8563 | case rs_cfa: | |
8564 | case rs_dwarf2dbg: | |
8565 | /* No further adjustments needed. */ | |
8566 | break; | |
8567 | case rs_machine_dependent: | |
8568 | if (fragP->fr_subtype != RELAX_DESIRE_ALIGN) | |
8569 | size += fragP->fr_var; | |
8570 | break; | |
8571 | default: | |
8572 | /* We had darn well better know how big it is. */ | |
9c2799c2 | 8573 | gas_assert (0); |
43cd72b9 BW |
8574 | break; |
8575 | } | |
8576 | ||
8577 | return size; | |
8578 | } | |
8579 | ||
8580 | ||
e0001a05 NC |
8581 | /* Re-process all of the fragments looking to convert all |
8582 | of the RELAX_ADD_NOP_IF_SHORT_LOOP. If: | |
8583 | ||
8584 | A) | |
8585 | 1) the instruction size count to the loop end label | |
8586 | is too short (<= 2 instructions), | |
8587 | 2) loop has a jump or branch in it | |
8588 | ||
8589 | or B) | |
43cd72b9 | 8590 | 1) workaround_all_short_loops is TRUE |
e0001a05 NC |
8591 | 2) The generating loop was a 'loopgtz' or 'loopnez' |
8592 | 3) the instruction size count to the loop end label is too short | |
8593 | (<= 2 instructions) | |
8594 | then convert this frag (and maybe the next one) to generate a NOP. | |
8595 | In any case close it off with a .fill 0. */ | |
8596 | ||
d77b99c9 | 8597 | static int count_insns_to_loop_end (fragS *, bfd_boolean, int); |
7fa3d080 BW |
8598 | static bfd_boolean branch_before_loop_end (fragS *); |
8599 | ||
e0001a05 | 8600 | static void |
7fa3d080 | 8601 | xtensa_fix_short_loop_frags (void) |
e0001a05 NC |
8602 | { |
8603 | frchainS *frchP; | |
c9049d30 | 8604 | asection *s; |
e0001a05 NC |
8605 | |
8606 | /* When this routine is called, all of the subsections are still intact | |
8607 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8608 | for (s = stdoutput->sections; s; s = s->next) |
8609 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8610 | { | |
8611 | fragS *fragP; | |
c9049d30 | 8612 | xtensa_opcode current_opcode = XTENSA_UNDEFINED; |
e0001a05 | 8613 | |
c9049d30 AM |
8614 | /* Walk over all of the fragments in a subsection. */ |
8615 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8616 | { | |
8617 | if (fragP->fr_type == rs_machine_dependent | |
8618 | && ((fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE) | |
8619 | || (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE))) | |
8620 | { | |
8621 | TInsn t_insn; | |
8622 | fragS *loop_frag = next_non_empty_frag (fragP); | |
8623 | tinsn_from_chars (&t_insn, loop_frag->fr_opcode, 0); | |
c9049d30 | 8624 | current_opcode = t_insn.opcode; |
9c2799c2 | 8625 | gas_assert (xtensa_opcode_is_loop (xtensa_default_isa, |
64b607e6 | 8626 | current_opcode) == 1); |
c9049d30 | 8627 | } |
e0001a05 | 8628 | |
c9049d30 AM |
8629 | if (fragP->fr_type == rs_machine_dependent |
8630 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_SHORT_LOOP) | |
8631 | { | |
8632 | if (count_insns_to_loop_end (fragP->fr_next, TRUE, 3) < 3 | |
8633 | && (branch_before_loop_end (fragP->fr_next) | |
8634 | || (workaround_all_short_loops | |
8635 | && current_opcode != XTENSA_UNDEFINED | |
8636 | && current_opcode != xtensa_loop_opcode))) | |
8637 | { | |
8638 | if (fragP->tc_frag_data.is_no_transform) | |
8639 | as_bad (_("loop containing less than three instructions may trigger hardware errata")); | |
8640 | else | |
8641 | relax_frag_add_nop (fragP); | |
8642 | } | |
8643 | frag_wane (fragP); | |
8644 | } | |
8645 | } | |
8646 | } | |
e0001a05 NC |
8647 | } |
8648 | ||
8649 | ||
d77b99c9 | 8650 | static int unrelaxed_frag_min_insn_count (fragS *); |
7fa3d080 | 8651 | |
d77b99c9 | 8652 | static int |
7fa3d080 BW |
8653 | count_insns_to_loop_end (fragS *base_fragP, |
8654 | bfd_boolean count_relax_add, | |
d77b99c9 | 8655 | int max_count) |
e0001a05 NC |
8656 | { |
8657 | fragS *fragP = NULL; | |
d77b99c9 | 8658 | int insn_count = 0; |
e0001a05 NC |
8659 | |
8660 | fragP = base_fragP; | |
8661 | ||
8662 | for (; fragP && !fragP->tc_frag_data.is_loop_target; fragP = fragP->fr_next) | |
8663 | { | |
8664 | insn_count += unrelaxed_frag_min_insn_count (fragP); | |
8665 | if (insn_count >= max_count) | |
8666 | return max_count; | |
8667 | ||
8668 | if (count_relax_add) | |
8669 | { | |
8670 | if (fragP->fr_type == rs_machine_dependent | |
8671 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_SHORT_LOOP) | |
8672 | { | |
8673 | /* In order to add the appropriate number of | |
8674 | NOPs, we count an instruction for downstream | |
8675 | occurrences. */ | |
8676 | insn_count++; | |
8677 | if (insn_count >= max_count) | |
8678 | return max_count; | |
8679 | } | |
8680 | } | |
8681 | } | |
8682 | return insn_count; | |
8683 | } | |
8684 | ||
8685 | ||
d77b99c9 | 8686 | static int |
7fa3d080 | 8687 | unrelaxed_frag_min_insn_count (fragS *fragP) |
e0001a05 | 8688 | { |
43cd72b9 BW |
8689 | xtensa_isa isa = xtensa_default_isa; |
8690 | static xtensa_insnbuf insnbuf = NULL; | |
d77b99c9 | 8691 | int insn_count = 0; |
871a6bd2 | 8692 | unsigned int offset = 0; |
e0001a05 NC |
8693 | |
8694 | if (!fragP->tc_frag_data.is_insn) | |
8695 | return insn_count; | |
8696 | ||
43cd72b9 BW |
8697 | if (!insnbuf) |
8698 | insnbuf = xtensa_insnbuf_alloc (isa); | |
8699 | ||
e0001a05 NC |
8700 | /* Decode the fixed instructions. */ |
8701 | while (offset < fragP->fr_fix) | |
8702 | { | |
43cd72b9 BW |
8703 | xtensa_format fmt; |
8704 | ||
d77b99c9 BW |
8705 | xtensa_insnbuf_from_chars |
8706 | (isa, insnbuf, (unsigned char *) fragP->fr_literal + offset, 0); | |
43cd72b9 BW |
8707 | fmt = xtensa_format_decode (isa, insnbuf); |
8708 | ||
8709 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 NC |
8710 | { |
8711 | as_fatal (_("undecodable instruction in instruction frag")); | |
8712 | return insn_count; | |
8713 | } | |
43cd72b9 | 8714 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8715 | insn_count++; |
8716 | } | |
8717 | ||
8718 | return insn_count; | |
8719 | } | |
8720 | ||
8721 | ||
7fa3d080 BW |
8722 | static bfd_boolean unrelaxed_frag_has_b_j (fragS *); |
8723 | ||
43cd72b9 | 8724 | static bfd_boolean |
7fa3d080 | 8725 | branch_before_loop_end (fragS *base_fragP) |
e0001a05 NC |
8726 | { |
8727 | fragS *fragP; | |
8728 | ||
8729 | for (fragP = base_fragP; | |
8730 | fragP && !fragP->tc_frag_data.is_loop_target; | |
8731 | fragP = fragP->fr_next) | |
8732 | { | |
8733 | if (unrelaxed_frag_has_b_j (fragP)) | |
8734 | return TRUE; | |
8735 | } | |
8736 | return FALSE; | |
8737 | } | |
8738 | ||
8739 | ||
43cd72b9 | 8740 | static bfd_boolean |
7fa3d080 | 8741 | unrelaxed_frag_has_b_j (fragS *fragP) |
e0001a05 | 8742 | { |
43cd72b9 BW |
8743 | static xtensa_insnbuf insnbuf = NULL; |
8744 | xtensa_isa isa = xtensa_default_isa; | |
871a6bd2 | 8745 | unsigned int offset = 0; |
e0001a05 NC |
8746 | |
8747 | if (!fragP->tc_frag_data.is_insn) | |
8748 | return FALSE; | |
8749 | ||
43cd72b9 BW |
8750 | if (!insnbuf) |
8751 | insnbuf = xtensa_insnbuf_alloc (isa); | |
8752 | ||
e0001a05 NC |
8753 | /* Decode the fixed instructions. */ |
8754 | while (offset < fragP->fr_fix) | |
8755 | { | |
43cd72b9 BW |
8756 | xtensa_format fmt; |
8757 | int slot; | |
8758 | ||
d77b99c9 BW |
8759 | xtensa_insnbuf_from_chars |
8760 | (isa, insnbuf, (unsigned char *) fragP->fr_literal + offset, 0); | |
43cd72b9 BW |
8761 | fmt = xtensa_format_decode (isa, insnbuf); |
8762 | if (fmt == XTENSA_UNDEFINED) | |
8763 | return FALSE; | |
8764 | ||
8765 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
e0001a05 | 8766 | { |
43cd72b9 BW |
8767 | xtensa_opcode opcode = |
8768 | get_opcode_from_buf (fragP->fr_literal + offset, slot); | |
8769 | if (xtensa_opcode_is_branch (isa, opcode) == 1 | |
8770 | || xtensa_opcode_is_jump (isa, opcode) == 1) | |
8771 | return TRUE; | |
e0001a05 | 8772 | } |
43cd72b9 | 8773 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8774 | } |
8775 | return FALSE; | |
8776 | } | |
8777 | ||
8778 | ||
8779 | /* Checks to be made after initial assembly but before relaxation. */ | |
8780 | ||
7fa3d080 BW |
8781 | static bfd_boolean is_empty_loop (const TInsn *, fragS *); |
8782 | static bfd_boolean is_local_forward_loop (const TInsn *, fragS *); | |
8783 | ||
e0001a05 | 8784 | static void |
7fa3d080 | 8785 | xtensa_sanity_check (void) |
e0001a05 | 8786 | { |
3b4dbbbf | 8787 | const char *file_name; |
d77b99c9 | 8788 | unsigned line; |
e0001a05 | 8789 | frchainS *frchP; |
c9049d30 | 8790 | asection *s; |
e0001a05 | 8791 | |
3b4dbbbf | 8792 | file_name = as_where (&line); |
c9049d30 AM |
8793 | for (s = stdoutput->sections; s; s = s->next) |
8794 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8795 | { | |
8796 | fragS *fragP; | |
e0001a05 | 8797 | |
c9049d30 AM |
8798 | /* Walk over all of the fragments in a subsection. */ |
8799 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8800 | { | |
c9049d30 | 8801 | if (fragP->fr_type == rs_machine_dependent |
3739860c | 8802 | && fragP->fr_subtype == RELAX_SLOTS |
a7284bf1 | 8803 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED) |
c9049d30 AM |
8804 | { |
8805 | static xtensa_insnbuf insnbuf = NULL; | |
8806 | TInsn t_insn; | |
8807 | ||
8808 | if (fragP->fr_opcode != NULL) | |
8809 | { | |
8810 | if (!insnbuf) | |
8811 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
8812 | tinsn_from_chars (&t_insn, fragP->fr_opcode, 0); | |
8813 | tinsn_immed_from_frag (&t_insn, fragP, 0); | |
8814 | ||
8815 | if (xtensa_opcode_is_loop (xtensa_default_isa, | |
8816 | t_insn.opcode) == 1) | |
8817 | { | |
8818 | if (is_empty_loop (&t_insn, fragP)) | |
8819 | { | |
8820 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8821 | as_bad (_("invalid empty loop")); | |
8822 | } | |
8823 | if (!is_local_forward_loop (&t_insn, fragP)) | |
8824 | { | |
8825 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8826 | as_bad (_("loop target does not follow " | |
8827 | "loop instruction in section")); | |
8828 | } | |
8829 | } | |
8830 | } | |
8831 | } | |
8832 | } | |
8833 | } | |
e0001a05 NC |
8834 | new_logical_line (file_name, line); |
8835 | } | |
8836 | ||
8837 | ||
8838 | #define LOOP_IMMED_OPN 1 | |
8839 | ||
43cd72b9 | 8840 | /* Return TRUE if the loop target is the next non-zero fragment. */ |
e0001a05 | 8841 | |
7fa3d080 BW |
8842 | static bfd_boolean |
8843 | is_empty_loop (const TInsn *insn, fragS *fragP) | |
e0001a05 | 8844 | { |
91d6fa6a | 8845 | const expressionS *exp; |
e0001a05 NC |
8846 | symbolS *symbolP; |
8847 | fragS *next_fragP; | |
8848 | ||
8849 | if (insn->insn_type != ITYPE_INSN) | |
8850 | return FALSE; | |
8851 | ||
43cd72b9 | 8852 | if (xtensa_opcode_is_loop (xtensa_default_isa, insn->opcode) != 1) |
e0001a05 NC |
8853 | return FALSE; |
8854 | ||
8855 | if (insn->ntok <= LOOP_IMMED_OPN) | |
8856 | return FALSE; | |
8857 | ||
91d6fa6a | 8858 | exp = &insn->tok[LOOP_IMMED_OPN]; |
e0001a05 | 8859 | |
91d6fa6a | 8860 | if (exp->X_op != O_symbol) |
e0001a05 NC |
8861 | return FALSE; |
8862 | ||
91d6fa6a | 8863 | symbolP = exp->X_add_symbol; |
e0001a05 NC |
8864 | if (!symbolP) |
8865 | return FALSE; | |
8866 | ||
8867 | if (symbol_get_frag (symbolP) == NULL) | |
8868 | return FALSE; | |
8869 | ||
8870 | if (S_GET_VALUE (symbolP) != 0) | |
8871 | return FALSE; | |
8872 | ||
8873 | /* Walk through the zero-size fragments from this one. If we find | |
8874 | the target fragment, then this is a zero-size loop. */ | |
43cd72b9 | 8875 | |
e0001a05 NC |
8876 | for (next_fragP = fragP->fr_next; |
8877 | next_fragP != NULL; | |
8878 | next_fragP = next_fragP->fr_next) | |
8879 | { | |
8880 | if (next_fragP == symbol_get_frag (symbolP)) | |
8881 | return TRUE; | |
8882 | if (next_fragP->fr_fix != 0) | |
8883 | return FALSE; | |
8884 | } | |
8885 | return FALSE; | |
8886 | } | |
8887 | ||
8888 | ||
7fa3d080 BW |
8889 | static bfd_boolean |
8890 | is_local_forward_loop (const TInsn *insn, fragS *fragP) | |
e0001a05 | 8891 | { |
91d6fa6a | 8892 | const expressionS *exp; |
e0001a05 NC |
8893 | symbolS *symbolP; |
8894 | fragS *next_fragP; | |
8895 | ||
8896 | if (insn->insn_type != ITYPE_INSN) | |
8897 | return FALSE; | |
8898 | ||
64b607e6 | 8899 | if (xtensa_opcode_is_loop (xtensa_default_isa, insn->opcode) != 1) |
e0001a05 NC |
8900 | return FALSE; |
8901 | ||
8902 | if (insn->ntok <= LOOP_IMMED_OPN) | |
8903 | return FALSE; | |
8904 | ||
91d6fa6a | 8905 | exp = &insn->tok[LOOP_IMMED_OPN]; |
e0001a05 | 8906 | |
91d6fa6a | 8907 | if (exp->X_op != O_symbol) |
e0001a05 NC |
8908 | return FALSE; |
8909 | ||
91d6fa6a | 8910 | symbolP = exp->X_add_symbol; |
e0001a05 NC |
8911 | if (!symbolP) |
8912 | return FALSE; | |
8913 | ||
8914 | if (symbol_get_frag (symbolP) == NULL) | |
8915 | return FALSE; | |
8916 | ||
8917 | /* Walk through fragments until we find the target. | |
8918 | If we do not find the target, then this is an invalid loop. */ | |
43cd72b9 | 8919 | |
e0001a05 NC |
8920 | for (next_fragP = fragP->fr_next; |
8921 | next_fragP != NULL; | |
8922 | next_fragP = next_fragP->fr_next) | |
43cd72b9 BW |
8923 | { |
8924 | if (next_fragP == symbol_get_frag (symbolP)) | |
8925 | return TRUE; | |
8926 | } | |
e0001a05 NC |
8927 | |
8928 | return FALSE; | |
8929 | } | |
8930 | ||
2caa7ca0 BW |
8931 | |
8932 | #define XTINFO_NAME "Xtensa_Info" | |
8933 | #define XTINFO_NAMESZ 12 | |
8934 | #define XTINFO_TYPE 1 | |
8935 | ||
8936 | static void | |
8937 | xtensa_add_config_info (void) | |
8938 | { | |
8939 | asection *info_sec; | |
8940 | char *data, *p; | |
8941 | int sz; | |
8942 | ||
8943 | info_sec = subseg_new (".xtensa.info", 0); | |
fd361982 | 8944 | bfd_set_section_flags (info_sec, SEC_HAS_CONTENTS | SEC_READONLY); |
2caa7ca0 | 8945 | |
325801bd | 8946 | data = XNEWVEC (char, 100); |
2caa7ca0 BW |
8947 | sprintf (data, "USE_ABSOLUTE_LITERALS=%d\nABI=%d\n", |
8948 | XSHAL_USE_ABSOLUTE_LITERALS, XSHAL_ABI); | |
8949 | sz = strlen (data) + 1; | |
8950 | ||
8951 | /* Add enough null terminators to pad to a word boundary. */ | |
8952 | do | |
8953 | data[sz++] = 0; | |
8954 | while ((sz & 3) != 0); | |
8955 | ||
8956 | /* Follow the standard note section layout: | |
8957 | First write the length of the name string. */ | |
8958 | p = frag_more (4); | |
8959 | md_number_to_chars (p, (valueT) XTINFO_NAMESZ, 4); | |
8960 | ||
8961 | /* Next comes the length of the "descriptor", i.e., the actual data. */ | |
8962 | p = frag_more (4); | |
8963 | md_number_to_chars (p, (valueT) sz, 4); | |
8964 | ||
8965 | /* Write the note type. */ | |
8966 | p = frag_more (4); | |
8967 | md_number_to_chars (p, (valueT) XTINFO_TYPE, 4); | |
8968 | ||
8969 | /* Write the name field. */ | |
8970 | p = frag_more (XTINFO_NAMESZ); | |
8971 | memcpy (p, XTINFO_NAME, XTINFO_NAMESZ); | |
8972 | ||
8973 | /* Finally, write the descriptor. */ | |
8974 | p = frag_more (sz); | |
8975 | memcpy (p, data, sz); | |
8976 | ||
8977 | free (data); | |
8978 | } | |
8979 | ||
e0001a05 NC |
8980 | \f |
8981 | /* Alignment Functions. */ | |
8982 | ||
d77b99c9 BW |
8983 | static int |
8984 | get_text_align_power (unsigned target_size) | |
e0001a05 | 8985 | { |
03aaa593 BW |
8986 | if (target_size <= 4) |
8987 | return 2; | |
19ef5f3d SA |
8988 | |
8989 | if (target_size <= 8) | |
8990 | return 3; | |
8991 | ||
8992 | if (target_size <= 16) | |
8993 | return 4; | |
8994 | ||
8995 | if (target_size <= 32) | |
8996 | return 5; | |
8997 | ||
8998 | if (target_size <= 64) | |
8999 | return 6; | |
9000 | ||
9001 | if (target_size <= 128) | |
9002 | return 7; | |
9003 | ||
9004 | if (target_size <= 256) | |
9005 | return 8; | |
9006 | ||
9007 | if (target_size <= 512) | |
9008 | return 9; | |
9009 | ||
9010 | if (target_size <= 1024) | |
9011 | return 10; | |
9012 | ||
9013 | gas_assert (0); | |
9014 | return 0; | |
e0001a05 NC |
9015 | } |
9016 | ||
9017 | ||
d77b99c9 | 9018 | static int |
7fa3d080 BW |
9019 | get_text_align_max_fill_size (int align_pow, |
9020 | bfd_boolean use_nops, | |
9021 | bfd_boolean use_no_density) | |
e0001a05 NC |
9022 | { |
9023 | if (!use_nops) | |
9024 | return (1 << align_pow); | |
9025 | if (use_no_density) | |
9026 | return 3 * (1 << align_pow); | |
9027 | ||
9028 | return 1 + (1 << align_pow); | |
9029 | } | |
9030 | ||
9031 | ||
d77b99c9 BW |
9032 | /* Calculate the minimum bytes of fill needed at "address" to align a |
9033 | target instruction of size "target_size" so that it does not cross a | |
9034 | power-of-two boundary specified by "align_pow". If "use_nops" is FALSE, | |
9035 | the fill can be an arbitrary number of bytes. Otherwise, the space must | |
9036 | be filled by NOP instructions. */ | |
e0001a05 | 9037 | |
d77b99c9 | 9038 | static int |
7fa3d080 BW |
9039 | get_text_align_fill_size (addressT address, |
9040 | int align_pow, | |
9041 | int target_size, | |
9042 | bfd_boolean use_nops, | |
9043 | bfd_boolean use_no_density) | |
e0001a05 | 9044 | { |
d77b99c9 BW |
9045 | addressT alignment, fill, fill_limit, fill_step; |
9046 | bfd_boolean skip_one = FALSE; | |
e0001a05 | 9047 | |
d77b99c9 | 9048 | alignment = (1 << align_pow); |
9c2799c2 | 9049 | gas_assert (target_size > 0 && alignment >= (addressT) target_size); |
c138bc38 | 9050 | |
e0001a05 NC |
9051 | if (!use_nops) |
9052 | { | |
d77b99c9 BW |
9053 | fill_limit = alignment; |
9054 | fill_step = 1; | |
e0001a05 | 9055 | } |
d77b99c9 | 9056 | else if (!use_no_density) |
e0001a05 | 9057 | { |
d77b99c9 BW |
9058 | /* Combine 2- and 3-byte NOPs to fill anything larger than one. */ |
9059 | fill_limit = alignment * 2; | |
9060 | fill_step = 1; | |
9061 | skip_one = TRUE; | |
e0001a05 NC |
9062 | } |
9063 | else | |
9064 | { | |
d77b99c9 BW |
9065 | /* Fill with 3-byte NOPs -- can only fill multiples of 3. */ |
9066 | fill_limit = alignment * 3; | |
9067 | fill_step = 3; | |
9068 | } | |
e0001a05 | 9069 | |
d77b99c9 BW |
9070 | /* Try all fill sizes until finding one that works. */ |
9071 | for (fill = 0; fill < fill_limit; fill += fill_step) | |
9072 | { | |
9073 | if (skip_one && fill == 1) | |
9074 | continue; | |
9075 | if ((address + fill) >> align_pow | |
9076 | == (address + fill + target_size - 1) >> align_pow) | |
9077 | return fill; | |
e0001a05 | 9078 | } |
9c2799c2 | 9079 | gas_assert (0); |
e0001a05 NC |
9080 | return 0; |
9081 | } | |
9082 | ||
9083 | ||
664df4e4 BW |
9084 | static int |
9085 | branch_align_power (segT sec) | |
9086 | { | |
19ef5f3d SA |
9087 | /* If the Xtensa processor has a fetch width of X, and |
9088 | the section is aligned to at least that boundary, then a branch | |
9089 | target need only fit within that aligned block of memory to avoid | |
9090 | a stall. Otherwise, try to fit branch targets within 4-byte | |
9091 | aligned blocks (which may be insufficient, e.g., if the section | |
9092 | has no alignment, but it's good enough). */ | |
9093 | int fetch_align = get_text_align_power(xtensa_fetch_width); | |
9094 | int sec_align = get_recorded_alignment (sec); | |
9095 | ||
9096 | if (sec_align >= fetch_align) | |
9097 | return fetch_align; | |
664df4e4 BW |
9098 | |
9099 | return 2; | |
9100 | } | |
9101 | ||
9102 | ||
e0001a05 NC |
9103 | /* This will assert if it is not possible. */ |
9104 | ||
d77b99c9 BW |
9105 | static int |
9106 | get_text_align_nop_count (offsetT fill_size, bfd_boolean use_no_density) | |
e0001a05 | 9107 | { |
d77b99c9 BW |
9108 | int count = 0; |
9109 | ||
e0001a05 NC |
9110 | if (use_no_density) |
9111 | { | |
9c2799c2 | 9112 | gas_assert (fill_size % 3 == 0); |
e0001a05 NC |
9113 | return (fill_size / 3); |
9114 | } | |
9115 | ||
9c2799c2 | 9116 | gas_assert (fill_size != 1); /* Bad argument. */ |
e0001a05 NC |
9117 | |
9118 | while (fill_size > 1) | |
9119 | { | |
d77b99c9 | 9120 | int insn_size = 3; |
e0001a05 NC |
9121 | if (fill_size == 2 || fill_size == 4) |
9122 | insn_size = 2; | |
9123 | fill_size -= insn_size; | |
9124 | count++; | |
9125 | } | |
9c2799c2 | 9126 | gas_assert (fill_size != 1); /* Bad algorithm. */ |
e0001a05 NC |
9127 | return count; |
9128 | } | |
9129 | ||
9130 | ||
d77b99c9 BW |
9131 | static int |
9132 | get_text_align_nth_nop_size (offsetT fill_size, | |
9133 | int n, | |
7fa3d080 | 9134 | bfd_boolean use_no_density) |
e0001a05 | 9135 | { |
d77b99c9 | 9136 | int count = 0; |
e0001a05 NC |
9137 | |
9138 | if (use_no_density) | |
9139 | return 3; | |
9140 | ||
9c2799c2 | 9141 | gas_assert (fill_size != 1); /* Bad argument. */ |
d77b99c9 | 9142 | |
e0001a05 NC |
9143 | while (fill_size > 1) |
9144 | { | |
d77b99c9 | 9145 | int insn_size = 3; |
e0001a05 NC |
9146 | if (fill_size == 2 || fill_size == 4) |
9147 | insn_size = 2; | |
9148 | fill_size -= insn_size; | |
9149 | count++; | |
9150 | if (n + 1 == count) | |
9151 | return insn_size; | |
9152 | } | |
9c2799c2 | 9153 | gas_assert (0); |
e0001a05 NC |
9154 | return 0; |
9155 | } | |
9156 | ||
9157 | ||
9158 | /* For the given fragment, find the appropriate address | |
9159 | for it to begin at if we are using NOPs to align it. */ | |
9160 | ||
9161 | static addressT | |
7fa3d080 | 9162 | get_noop_aligned_address (fragS *fragP, addressT address) |
e0001a05 | 9163 | { |
43cd72b9 BW |
9164 | /* The rule is: get next fragment's FIRST instruction. Find |
9165 | the smallest number of bytes that need to be added to | |
9166 | ensure that the next fragment's FIRST instruction will fit | |
9167 | in a single word. | |
c138bc38 | 9168 | |
43cd72b9 BW |
9169 | E.G., 2 bytes : 0, 1, 2 mod 4 |
9170 | 3 bytes: 0, 1 mod 4 | |
c138bc38 | 9171 | |
43cd72b9 BW |
9172 | If the FIRST instruction MIGHT be relaxed, |
9173 | assume that it will become a 3-byte instruction. | |
c138bc38 | 9174 | |
43cd72b9 BW |
9175 | Note again here that LOOP instructions are not bundleable, |
9176 | and this relaxation only applies to LOOP opcodes. */ | |
c138bc38 | 9177 | |
d77b99c9 | 9178 | int fill_size = 0; |
43cd72b9 BW |
9179 | int first_insn_size; |
9180 | int loop_insn_size; | |
9181 | addressT pre_opcode_bytes; | |
d77b99c9 | 9182 | int align_power; |
43cd72b9 BW |
9183 | fragS *first_insn; |
9184 | xtensa_opcode opcode; | |
9185 | bfd_boolean is_loop; | |
e0001a05 | 9186 | |
9c2799c2 NC |
9187 | gas_assert (fragP->fr_type == rs_machine_dependent); |
9188 | gas_assert (fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE); | |
e0001a05 | 9189 | |
43cd72b9 BW |
9190 | /* Find the loop frag. */ |
9191 | first_insn = next_non_empty_frag (fragP); | |
9192 | /* Now find the first insn frag. */ | |
9193 | first_insn = next_non_empty_frag (first_insn); | |
e0001a05 | 9194 | |
43cd72b9 | 9195 | is_loop = next_frag_opcode_is_loop (fragP, &opcode); |
9c2799c2 | 9196 | gas_assert (is_loop); |
43cd72b9 | 9197 | loop_insn_size = xg_get_single_size (opcode); |
e0001a05 | 9198 | |
43cd72b9 BW |
9199 | pre_opcode_bytes = next_frag_pre_opcode_bytes (fragP); |
9200 | pre_opcode_bytes += loop_insn_size; | |
e0001a05 | 9201 | |
43cd72b9 BW |
9202 | /* For loops, the alignment depends on the size of the |
9203 | instruction following the loop, not the LOOP instruction. */ | |
e0001a05 | 9204 | |
43cd72b9 | 9205 | if (first_insn == NULL) |
03aaa593 BW |
9206 | first_insn_size = xtensa_fetch_width; |
9207 | else | |
9208 | first_insn_size = get_loop_align_size (frag_format_size (first_insn)); | |
e0001a05 | 9209 | |
43cd72b9 | 9210 | /* If it was 8, then we'll need a larger alignment for the section. */ |
d77b99c9 BW |
9211 | align_power = get_text_align_power (first_insn_size); |
9212 | record_alignment (now_seg, align_power); | |
c138bc38 | 9213 | |
43cd72b9 | 9214 | fill_size = get_text_align_fill_size |
d77b99c9 BW |
9215 | (address + pre_opcode_bytes, align_power, first_insn_size, TRUE, |
9216 | fragP->tc_frag_data.is_no_density); | |
e0001a05 NC |
9217 | |
9218 | return address + fill_size; | |
9219 | } | |
9220 | ||
9221 | ||
43cd72b9 BW |
9222 | /* 3 mechanisms for relaxing an alignment: |
9223 | ||
9224 | Align to a power of 2. | |
9225 | Align so the next fragment's instruction does not cross a word boundary. | |
9226 | Align the current instruction so that if the next instruction | |
9227 | were 3 bytes, it would not cross a word boundary. | |
9228 | ||
e0001a05 NC |
9229 | We can align with: |
9230 | ||
43cd72b9 BW |
9231 | zeros - This is easy; always insert zeros. |
9232 | nops - 3-byte and 2-byte instructions | |
9233 | 2 - 2-byte nop | |
9234 | 3 - 3-byte nop | |
9235 | 4 - 2 2-byte nops | |
9236 | >=5 : 3-byte instruction + fn (n-3) | |
e0001a05 NC |
9237 | widening - widen previous instructions. */ |
9238 | ||
d77b99c9 BW |
9239 | static offsetT |
9240 | get_aligned_diff (fragS *fragP, addressT address, offsetT *max_diff) | |
e0001a05 | 9241 | { |
43cd72b9 BW |
9242 | addressT target_address, loop_insn_offset; |
9243 | int target_size; | |
9244 | xtensa_opcode loop_opcode; | |
9245 | bfd_boolean is_loop; | |
d77b99c9 BW |
9246 | int align_power; |
9247 | offsetT opt_diff; | |
5f9084e9 | 9248 | offsetT branch_align; |
def13efb | 9249 | fragS *loop_frag; |
e0001a05 | 9250 | |
9c2799c2 | 9251 | gas_assert (fragP->fr_type == rs_machine_dependent); |
43cd72b9 | 9252 | switch (fragP->fr_subtype) |
e0001a05 | 9253 | { |
43cd72b9 BW |
9254 | case RELAX_DESIRE_ALIGN: |
9255 | target_size = next_frag_format_size (fragP); | |
9256 | if (target_size == XTENSA_UNDEFINED) | |
9257 | target_size = 3; | |
664df4e4 BW |
9258 | align_power = branch_align_power (now_seg); |
9259 | branch_align = 1 << align_power; | |
0e5cd789 BW |
9260 | /* Don't count on the section alignment being as large as the target. */ |
9261 | if (target_size > branch_align) | |
9262 | target_size = branch_align; | |
d77b99c9 | 9263 | opt_diff = get_text_align_fill_size (address, align_power, |
43cd72b9 BW |
9264 | target_size, FALSE, FALSE); |
9265 | ||
664df4e4 BW |
9266 | *max_diff = (opt_diff + branch_align |
9267 | - (target_size + ((address + opt_diff) % branch_align))); | |
9c2799c2 | 9268 | gas_assert (*max_diff >= opt_diff); |
43cd72b9 | 9269 | return opt_diff; |
e0001a05 | 9270 | |
43cd72b9 | 9271 | case RELAX_ALIGN_NEXT_OPCODE: |
def13efb BW |
9272 | /* The next non-empty frag after this one holds the LOOP instruction |
9273 | that needs to be aligned. The required alignment depends on the | |
9274 | size of the next non-empty frag after the loop frag, i.e., the | |
9275 | first instruction in the loop. */ | |
9276 | loop_frag = next_non_empty_frag (fragP); | |
9277 | target_size = get_loop_align_size (next_frag_format_size (loop_frag)); | |
43cd72b9 BW |
9278 | loop_insn_offset = 0; |
9279 | is_loop = next_frag_opcode_is_loop (fragP, &loop_opcode); | |
9c2799c2 | 9280 | gas_assert (is_loop); |
43cd72b9 BW |
9281 | |
9282 | /* If the loop has been expanded then the LOOP instruction | |
9283 | could be at an offset from this fragment. */ | |
def13efb | 9284 | if (loop_frag->tc_frag_data.slot_subtypes[0] != RELAX_IMMED) |
43cd72b9 BW |
9285 | loop_insn_offset = get_expanded_loop_offset (loop_opcode); |
9286 | ||
43cd72b9 BW |
9287 | /* In an ideal world, which is what we are shooting for here, |
9288 | we wouldn't need to use any NOPs immediately prior to the | |
9289 | LOOP instruction. If this approach fails, relax_frag_loop_align | |
9290 | will call get_noop_aligned_address. */ | |
9291 | target_address = | |
9292 | address + loop_insn_offset + xg_get_single_size (loop_opcode); | |
def13efb | 9293 | align_power = get_text_align_power (target_size); |
d77b99c9 | 9294 | opt_diff = get_text_align_fill_size (target_address, align_power, |
43cd72b9 BW |
9295 | target_size, FALSE, FALSE); |
9296 | ||
9297 | *max_diff = xtensa_fetch_width | |
9298 | - ((target_address + opt_diff) % xtensa_fetch_width) | |
9299 | - target_size + opt_diff; | |
9c2799c2 | 9300 | gas_assert (*max_diff >= opt_diff); |
43cd72b9 | 9301 | return opt_diff; |
e0001a05 | 9302 | |
43cd72b9 BW |
9303 | default: |
9304 | break; | |
e0001a05 | 9305 | } |
9c2799c2 | 9306 | gas_assert (0); |
43cd72b9 | 9307 | return 0; |
e0001a05 NC |
9308 | } |
9309 | ||
9310 | \f | |
9311 | /* md_relax_frag Hook and Helper Functions. */ | |
9312 | ||
7fa3d080 BW |
9313 | static long relax_frag_loop_align (fragS *, long); |
9314 | static long relax_frag_for_align (fragS *, long); | |
9315 | static long relax_frag_immed | |
9316 | (segT, fragS *, long, int, xtensa_format, int, int *, bfd_boolean); | |
9317 | ||
fe6c2f1b MF |
9318 | /* Get projected address for the first fulcrum on a path from source to |
9319 | target. */ | |
9320 | static addressT xg_get_fulcrum (addressT source, addressT target) | |
b76f99d7 | 9321 | { |
fe6c2f1b MF |
9322 | offsetT delta = target - source; |
9323 | int n; | |
b76f99d7 | 9324 | |
fe6c2f1b MF |
9325 | n = (labs (delta) + J_RANGE - J_MARGIN - 1) / (J_RANGE - J_MARGIN); |
9326 | return source + delta / n; | |
9327 | } | |
b76f99d7 | 9328 | |
fe6c2f1b MF |
9329 | /* Given trampoline index, source and target of a jump find the best |
9330 | candidate trampoline for the first fulcrum. The best trampoline is | |
9331 | the one in the reach of "j' instruction from the source, closest to | |
9332 | the projected fulcrum address, and preferrably w/o a jump around or | |
9333 | with already initialized jump around. */ | |
9334 | static size_t xg_find_best_trampoline (struct trampoline_index *idx, | |
9335 | addressT source, addressT target) | |
b76f99d7 | 9336 | { |
fe6c2f1b MF |
9337 | addressT fulcrum = xg_get_fulcrum (source, target); |
9338 | size_t dist = 0; | |
9339 | size_t best = -1; | |
9340 | size_t base_tr = xg_find_trampoline (idx, fulcrum); | |
9341 | int checked = 1; | |
b76f99d7 | 9342 | |
fe6c2f1b MF |
9343 | /* Check trampoline frags around the base_tr to find the best. */ |
9344 | for (dist = 0; checked; ++dist) | |
b76f99d7 | 9345 | { |
fe6c2f1b MF |
9346 | int i; |
9347 | size_t tr = base_tr - dist; | |
9348 | ||
9349 | checked = 0; | |
9350 | ||
9351 | /* Trampolines are checked in the following order: | |
9352 | base_tr, base_tr + 1, base_tr - 1, base_tr + 2, base_tr - 2 */ | |
9353 | for (i = 0; i < 2; ++i, tr = base_tr + dist + 1) | |
9354 | if (tr < idx->n_entries) | |
9355 | { | |
9356 | fragS *trampoline_frag = idx->entry[tr]; | |
9357 | offsetT off; | |
9358 | ||
9359 | /* Don't check trampolines outside source - target interval. */ | |
9360 | if ((trampoline_frag->fr_address < source && | |
9361 | trampoline_frag->fr_address < target) || | |
9362 | (trampoline_frag->fr_address > source && | |
9363 | trampoline_frag->fr_address > target)) | |
9364 | continue; | |
9365 | ||
db5d5ad1 MF |
9366 | /* Don't choose trampoline that contains the source. */ |
9367 | if (source >= trampoline_frag->fr_address | |
9368 | && source <= trampoline_frag->fr_address + | |
9369 | trampoline_frag->fr_fix) | |
9370 | continue; | |
9371 | ||
fe6c2f1b MF |
9372 | off = trampoline_frag->fr_address - fulcrum; |
9373 | /* Stop if some trampoline is found and the search is more than | |
9374 | J_RANGE / 4 from the projected fulcrum. A trampoline w/o jump | |
9375 | around is nice, but it shouldn't have much overhead. */ | |
9376 | if (best < idx->n_entries && labs (off) > J_RANGE / 4) | |
9377 | return best; | |
9378 | ||
9379 | off = trampoline_frag->fr_address - source; | |
9380 | if (labs (off) < J_RANGE - J_MARGIN) | |
9381 | { | |
9382 | ++checked; | |
9383 | /* Stop if a trampoline w/o jump around is found or initialized | |
9384 | trampoline with jump around is found. */ | |
9385 | if (!trampoline_frag->tc_frag_data.needs_jump_around || | |
9386 | trampoline_frag->fr_fix) | |
9387 | return tr; | |
9388 | else if (best >= idx->n_entries) | |
9389 | best = tr; | |
9390 | } | |
9391 | } | |
b76f99d7 | 9392 | } |
fe6c2f1b MF |
9393 | |
9394 | if (best < idx->n_entries) | |
9395 | return best; | |
9396 | else | |
9397 | as_fatal (_("cannot find suitable trampoline")); | |
b76f99d7 MF |
9398 | } |
9399 | ||
fe6c2f1b MF |
9400 | static fixS *xg_relax_fixup (struct trampoline_index *idx, fixS *fixP) |
9401 | { | |
9402 | symbolS *s = fixP->fx_addsy; | |
9403 | addressT source = fixP->fx_frag->fr_address; | |
9404 | addressT target = S_GET_VALUE (s) + fixP->fx_offset; | |
9405 | size_t tr = xg_find_best_trampoline (idx, source, target); | |
9406 | fragS *trampoline_frag = idx->entry[tr]; | |
9407 | fixS *newfixP; | |
9408 | ||
9409 | init_trampoline_frag (trampoline_frag); | |
9410 | newfixP = xg_append_jump (trampoline_frag, | |
9411 | fixP->fx_addsy, fixP->fx_offset); | |
9412 | ||
9413 | /* Adjust the fixup for the original "j" instruction to | |
9414 | point to the newly added jump. */ | |
9415 | fixP->fx_addsy = trampoline_frag->fr_symbol; | |
9416 | fixP->fx_offset = trampoline_frag->fr_fix - 3; | |
9417 | fixP->tc_fix_data.X_add_symbol = trampoline_frag->fr_symbol; | |
9418 | fixP->tc_fix_data.X_add_number = trampoline_frag->fr_fix - 3; | |
9419 | ||
9420 | trampoline_frag->tc_frag_data.relax_seen = FALSE; | |
9421 | ||
9422 | if (xg_is_trampoline_frag_full (trampoline_frag)) | |
9423 | xg_remove_trampoline_from_index (idx, tr); | |
9424 | ||
9425 | return newfixP; | |
9426 | } | |
9427 | ||
9428 | static bfd_boolean xg_is_relaxable_fixup (fixS *fixP) | |
b76f99d7 MF |
9429 | { |
9430 | xtensa_isa isa = xtensa_default_isa; | |
fe6c2f1b MF |
9431 | addressT addr = fixP->fx_frag->fr_address; |
9432 | addressT target; | |
9433 | offsetT delta; | |
b76f99d7 MF |
9434 | symbolS *s = fixP->fx_addsy; |
9435 | int slot; | |
9436 | xtensa_format fmt; | |
9437 | xtensa_opcode opcode; | |
9438 | ||
9439 | if (fixP->fx_r_type < BFD_RELOC_XTENSA_SLOT0_OP || | |
9440 | fixP->fx_r_type > BFD_RELOC_XTENSA_SLOT14_OP) | |
9441 | return FALSE; | |
fe6c2f1b MF |
9442 | |
9443 | target = S_GET_VALUE (s) + fixP->fx_offset; | |
b76f99d7 MF |
9444 | delta = target - addr; |
9445 | ||
fe6c2f1b | 9446 | if (labs (delta) < J_RANGE - J_MARGIN) |
b76f99d7 MF |
9447 | return FALSE; |
9448 | ||
9449 | xtensa_insnbuf_from_chars (isa, trampoline_buf, | |
9450 | (unsigned char *) fixP->fx_frag->fr_literal + | |
9451 | fixP->fx_where, 0); | |
9452 | fmt = xtensa_format_decode (isa, trampoline_buf); | |
9453 | gas_assert (fmt != XTENSA_UNDEFINED); | |
9454 | slot = fixP->tc_fix_data.slot; | |
9455 | xtensa_format_get_slot (isa, fmt, slot, trampoline_buf, trampoline_slotbuf); | |
9456 | opcode = xtensa_opcode_decode (isa, fmt, slot, trampoline_slotbuf); | |
fe6c2f1b | 9457 | return opcode == xtensa_j_opcode; |
b76f99d7 MF |
9458 | } |
9459 | ||
fe6c2f1b | 9460 | static void xg_relax_fixups (struct trampoline_seg *ts) |
b76f99d7 | 9461 | { |
fe6c2f1b MF |
9462 | struct trampoline_index *idx = &ts->index; |
9463 | segment_info_type *seginfo = seg_info (now_seg); | |
9464 | fixS *fx; | |
b76f99d7 | 9465 | |
fe6c2f1b | 9466 | for (fx = seginfo->fix_root; fx; fx = fx->fx_next) |
b76f99d7 | 9467 | { |
fe6c2f1b | 9468 | fixS *fixP = fx; |
148d6384 MF |
9469 | struct trampoline_chain *tc = NULL; |
9470 | ||
9471 | if (xg_is_relaxable_fixup (fixP)) | |
9472 | { | |
9473 | tc = xg_find_best_eq_target (ts, fixP->fx_frag->fr_address, | |
9474 | &fixP->fx_addsy, &fixP->fx_offset); | |
9475 | if (!tc) | |
9476 | tc = xg_create_trampoline_chain (ts, fixP->fx_addsy, | |
9477 | fixP->fx_offset); | |
9478 | gas_assert (tc); | |
9479 | } | |
b76f99d7 | 9480 | |
fe6c2f1b | 9481 | while (xg_is_relaxable_fixup (fixP)) |
148d6384 MF |
9482 | { |
9483 | fixP = xg_relax_fixup (idx, fixP); | |
9484 | xg_add_location_to_chain (tc, fixP->fx_frag->fr_symbol, | |
9485 | fixP->fx_where); | |
9486 | } | |
b76f99d7 | 9487 | } |
b76f99d7 | 9488 | } |
7fa3d080 | 9489 | |
fe6c2f1b MF |
9490 | /* Given a trampoline frag relax all jumps that might want to use this |
9491 | trampoline. Only do real work once per relaxation cycle, when | |
9492 | xg_relax_trampoline is called for the first trampoline in the now_seg. | |
9493 | Don't use stretch, don't update new_stretch: place fulcrums with a | |
9494 | slack to tolerate code movement. In the worst case if a jump between | |
9495 | two trampolines wouldn't reach the next relaxation pass will fix it. */ | |
9496 | static void xg_relax_trampoline (fragS *fragP, long stretch ATTRIBUTE_UNUSED, | |
9497 | long *new_stretch ATTRIBUTE_UNUSED) | |
120bc8b8 | 9498 | { |
fe6c2f1b | 9499 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); |
120bc8b8 | 9500 | |
fe6c2f1b MF |
9501 | if (ts->index.n_entries && ts->index.entry[0] == fragP) |
9502 | xg_relax_fixups (ts); | |
120bc8b8 MF |
9503 | } |
9504 | ||
e0001a05 NC |
9505 | /* Return the number of bytes added to this fragment, given that the |
9506 | input has been stretched already by "stretch". */ | |
9507 | ||
9508 | long | |
7fa3d080 | 9509 | xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p) |
e0001a05 | 9510 | { |
43cd72b9 | 9511 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
9512 | int unreported = fragP->tc_frag_data.unreported_expansion; |
9513 | long new_stretch = 0; | |
3b4dbbbf | 9514 | const char *file_name; |
d77b99c9 BW |
9515 | unsigned line; |
9516 | int lit_size; | |
43cd72b9 BW |
9517 | static xtensa_insnbuf vbuf = NULL; |
9518 | int slot, num_slots; | |
9519 | xtensa_format fmt; | |
e0001a05 | 9520 | |
3b4dbbbf | 9521 | file_name = as_where (&line); |
e0001a05 NC |
9522 | new_logical_line (fragP->fr_file, fragP->fr_line); |
9523 | ||
9524 | fragP->tc_frag_data.unreported_expansion = 0; | |
9525 | ||
9526 | switch (fragP->fr_subtype) | |
9527 | { | |
9528 | case RELAX_ALIGN_NEXT_OPCODE: | |
9529 | /* Always convert. */ | |
43cd72b9 BW |
9530 | if (fragP->tc_frag_data.relax_seen) |
9531 | new_stretch = relax_frag_loop_align (fragP, stretch); | |
e0001a05 NC |
9532 | break; |
9533 | ||
9534 | case RELAX_LOOP_END: | |
9535 | /* Do nothing. */ | |
9536 | break; | |
9537 | ||
9538 | case RELAX_LOOP_END_ADD_NOP: | |
9539 | /* Add a NOP and switch to .fill 0. */ | |
9540 | new_stretch = relax_frag_add_nop (fragP); | |
43cd72b9 | 9541 | frag_wane (fragP); |
e0001a05 NC |
9542 | break; |
9543 | ||
9544 | case RELAX_DESIRE_ALIGN: | |
43cd72b9 | 9545 | /* Do nothing. The narrowing before this frag will either align |
e0001a05 NC |
9546 | it or not. */ |
9547 | break; | |
9548 | ||
9549 | case RELAX_LITERAL: | |
9550 | case RELAX_LITERAL_FINAL: | |
9551 | return 0; | |
9552 | ||
9553 | case RELAX_LITERAL_NR: | |
9554 | lit_size = 4; | |
9555 | fragP->fr_subtype = RELAX_LITERAL_FINAL; | |
9c2799c2 | 9556 | gas_assert (unreported == lit_size); |
e0001a05 NC |
9557 | memset (&fragP->fr_literal[fragP->fr_fix], 0, 4); |
9558 | fragP->fr_var -= lit_size; | |
9559 | fragP->fr_fix += lit_size; | |
9560 | new_stretch = 4; | |
9561 | break; | |
9562 | ||
43cd72b9 BW |
9563 | case RELAX_SLOTS: |
9564 | if (vbuf == NULL) | |
9565 | vbuf = xtensa_insnbuf_alloc (isa); | |
9566 | ||
d77b99c9 BW |
9567 | xtensa_insnbuf_from_chars |
9568 | (isa, vbuf, (unsigned char *) fragP->fr_opcode, 0); | |
43cd72b9 BW |
9569 | fmt = xtensa_format_decode (isa, vbuf); |
9570 | num_slots = xtensa_format_num_slots (isa, fmt); | |
e0001a05 | 9571 | |
43cd72b9 BW |
9572 | for (slot = 0; slot < num_slots; slot++) |
9573 | { | |
9574 | switch (fragP->tc_frag_data.slot_subtypes[slot]) | |
9575 | { | |
9576 | case RELAX_NARROW: | |
9577 | if (fragP->tc_frag_data.relax_seen) | |
9578 | new_stretch += relax_frag_for_align (fragP, stretch); | |
9579 | break; | |
9580 | ||
9581 | case RELAX_IMMED: | |
9582 | case RELAX_IMMED_STEP1: | |
9583 | case RELAX_IMMED_STEP2: | |
b81bf389 | 9584 | case RELAX_IMMED_STEP3: |
43cd72b9 BW |
9585 | /* Place the immediate. */ |
9586 | new_stretch += relax_frag_immed | |
9587 | (now_seg, fragP, stretch, | |
9588 | fragP->tc_frag_data.slot_subtypes[slot] - RELAX_IMMED, | |
9589 | fmt, slot, stretched_p, FALSE); | |
9590 | break; | |
9591 | ||
9592 | default: | |
9593 | /* This is OK; see the note in xg_assemble_vliw_tokens. */ | |
9594 | break; | |
9595 | } | |
9596 | } | |
e0001a05 NC |
9597 | break; |
9598 | ||
9599 | case RELAX_LITERAL_POOL_BEGIN: | |
b46824bd MF |
9600 | if (fragP->fr_var != 0) |
9601 | { | |
9602 | /* We have a converted "candidate" literal pool; | |
9603 | assemble a jump around it. */ | |
9604 | TInsn insn; | |
9605 | if (!litpool_slotbuf) | |
9606 | { | |
9607 | litpool_buf = xtensa_insnbuf_alloc (isa); | |
9608 | litpool_slotbuf = xtensa_insnbuf_alloc (isa); | |
9609 | } | |
9610 | new_stretch += 3; | |
9611 | fragP->tc_frag_data.relax_seen = FALSE; /* Need another pass. */ | |
9612 | fragP->tc_frag_data.is_insn = TRUE; | |
9613 | tinsn_init (&insn); | |
9614 | insn.insn_type = ITYPE_INSN; | |
9615 | insn.opcode = xtensa_j_opcode; | |
9616 | insn.ntok = 1; | |
9617 | set_expr_symbol_offset (&insn.tok[0], fragP->fr_symbol, | |
9618 | fragP->fr_fix); | |
9619 | fmt = xg_get_single_format (xtensa_j_opcode); | |
9620 | tinsn_to_slotbuf (fmt, 0, &insn, litpool_slotbuf); | |
9621 | xtensa_format_set_slot (isa, fmt, 0, litpool_buf, litpool_slotbuf); | |
9622 | xtensa_insnbuf_to_chars (isa, litpool_buf, | |
9623 | (unsigned char *)fragP->fr_literal + | |
9624 | fragP->fr_fix, 3); | |
9625 | fragP->fr_fix += 3; | |
9626 | fragP->fr_var -= 3; | |
9627 | /* Add a fix-up. */ | |
9628 | fix_new (fragP, 0, 3, fragP->fr_symbol, 0, TRUE, | |
9629 | BFD_RELOC_XTENSA_SLOT0_OP); | |
9630 | } | |
9631 | break; | |
9632 | ||
e0001a05 | 9633 | case RELAX_LITERAL_POOL_END: |
b46824bd | 9634 | case RELAX_LITERAL_POOL_CANDIDATE_BEGIN: |
43cd72b9 BW |
9635 | case RELAX_MAYBE_UNREACHABLE: |
9636 | case RELAX_MAYBE_DESIRE_ALIGN: | |
e0001a05 NC |
9637 | /* No relaxation required. */ |
9638 | break; | |
9639 | ||
43cd72b9 BW |
9640 | case RELAX_FILL_NOP: |
9641 | case RELAX_UNREACHABLE: | |
9642 | if (fragP->tc_frag_data.relax_seen) | |
9643 | new_stretch += relax_frag_for_align (fragP, stretch); | |
9644 | break; | |
9645 | ||
a82c7d90 DW |
9646 | case RELAX_TRAMPOLINE: |
9647 | if (fragP->tc_frag_data.relax_seen) | |
120bc8b8 | 9648 | xg_relax_trampoline (fragP, stretch, &new_stretch); |
a82c7d90 DW |
9649 | break; |
9650 | ||
e0001a05 NC |
9651 | default: |
9652 | as_bad (_("bad relaxation state")); | |
9653 | } | |
9654 | ||
43cd72b9 | 9655 | /* Tell gas we need another relaxation pass. */ |
c138bc38 | 9656 | if (! fragP->tc_frag_data.relax_seen) |
43cd72b9 BW |
9657 | { |
9658 | fragP->tc_frag_data.relax_seen = TRUE; | |
9659 | *stretched_p = 1; | |
9660 | } | |
9661 | ||
e0001a05 NC |
9662 | new_logical_line (file_name, line); |
9663 | return new_stretch; | |
9664 | } | |
9665 | ||
9666 | ||
9667 | static long | |
7fa3d080 | 9668 | relax_frag_loop_align (fragS *fragP, long stretch) |
e0001a05 NC |
9669 | { |
9670 | addressT old_address, old_next_address, old_size; | |
9671 | addressT new_address, new_next_address, new_size; | |
9672 | addressT growth; | |
9673 | ||
43cd72b9 BW |
9674 | /* All the frags with relax_frag_for_alignment prior to this one in the |
9675 | section have been done, hopefully eliminating the need for a NOP here. | |
9676 | But, this will put it in if necessary. */ | |
e0001a05 NC |
9677 | |
9678 | /* Calculate the old address of this fragment and the next fragment. */ | |
9679 | old_address = fragP->fr_address - stretch; | |
9680 | old_next_address = (fragP->fr_address - stretch + fragP->fr_fix + | |
43cd72b9 | 9681 | fragP->tc_frag_data.text_expansion[0]); |
e0001a05 NC |
9682 | old_size = old_next_address - old_address; |
9683 | ||
9684 | /* Calculate the new address of this fragment and the next fragment. */ | |
9685 | new_address = fragP->fr_address; | |
9686 | new_next_address = | |
9687 | get_noop_aligned_address (fragP, fragP->fr_address + fragP->fr_fix); | |
9688 | new_size = new_next_address - new_address; | |
9689 | ||
9690 | growth = new_size - old_size; | |
9691 | ||
9692 | /* Fix up the text_expansion field and return the new growth. */ | |
43cd72b9 | 9693 | fragP->tc_frag_data.text_expansion[0] += growth; |
e0001a05 NC |
9694 | return growth; |
9695 | } | |
9696 | ||
9697 | ||
43cd72b9 | 9698 | /* Add a NOP instruction. */ |
e0001a05 NC |
9699 | |
9700 | static long | |
7fa3d080 | 9701 | relax_frag_add_nop (fragS *fragP) |
e0001a05 | 9702 | { |
e0001a05 | 9703 | char *nop_buf = fragP->fr_literal + fragP->fr_fix; |
43cd72b9 BW |
9704 | int length = fragP->tc_frag_data.is_no_density ? 3 : 2; |
9705 | assemble_nop (length, nop_buf); | |
e0001a05 | 9706 | fragP->tc_frag_data.is_insn = TRUE; |
e0001a05 | 9707 | |
e0001a05 NC |
9708 | if (fragP->fr_var < length) |
9709 | { | |
dd49a749 | 9710 | as_fatal (_("fr_var (%ld) < length (%d)"), (long) fragP->fr_var, length); |
e0001a05 NC |
9711 | return 0; |
9712 | } | |
9713 | ||
9714 | fragP->fr_fix += length; | |
9715 | fragP->fr_var -= length; | |
e0001a05 NC |
9716 | return length; |
9717 | } | |
9718 | ||
9719 | ||
7fa3d080 BW |
9720 | static long future_alignment_required (fragS *, long); |
9721 | ||
e0001a05 | 9722 | static long |
7fa3d080 | 9723 | relax_frag_for_align (fragS *fragP, long stretch) |
e0001a05 | 9724 | { |
43cd72b9 BW |
9725 | /* Overview of the relaxation procedure for alignment: |
9726 | We can widen with NOPs or by widening instructions or by filling | |
9727 | bytes after jump instructions. Find the opportune places and widen | |
9728 | them if necessary. */ | |
9729 | ||
9730 | long stretch_me; | |
9731 | long diff; | |
e0001a05 | 9732 | |
9c2799c2 | 9733 | gas_assert (fragP->fr_subtype == RELAX_FILL_NOP |
43cd72b9 BW |
9734 | || fragP->fr_subtype == RELAX_UNREACHABLE |
9735 | || (fragP->fr_subtype == RELAX_SLOTS | |
9736 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW)); | |
9737 | ||
9738 | stretch_me = future_alignment_required (fragP, stretch); | |
9739 | diff = stretch_me - fragP->tc_frag_data.text_expansion[0]; | |
9740 | if (diff == 0) | |
9741 | return 0; | |
e0001a05 | 9742 | |
43cd72b9 | 9743 | if (diff < 0) |
e0001a05 | 9744 | { |
43cd72b9 BW |
9745 | /* We expanded on a previous pass. Can we shrink now? */ |
9746 | long shrink = fragP->tc_frag_data.text_expansion[0] - stretch_me; | |
9747 | if (shrink <= stretch && stretch > 0) | |
e0001a05 | 9748 | { |
43cd72b9 BW |
9749 | fragP->tc_frag_data.text_expansion[0] = stretch_me; |
9750 | return -shrink; | |
e0001a05 NC |
9751 | } |
9752 | return 0; | |
9753 | } | |
9754 | ||
43cd72b9 BW |
9755 | /* Below here, diff > 0. */ |
9756 | fragP->tc_frag_data.text_expansion[0] = stretch_me; | |
e0001a05 | 9757 | |
43cd72b9 | 9758 | return diff; |
e0001a05 NC |
9759 | } |
9760 | ||
9761 | ||
43cd72b9 BW |
9762 | /* Return the address of the next frag that should be aligned. |
9763 | ||
9764 | By "address" we mean the address it _would_ be at if there | |
9765 | is no action taken to align it between here and the target frag. | |
9766 | In other words, if no narrows and no fill nops are used between | |
9767 | here and the frag to align, _even_if_ some of the frags we use | |
9768 | to align targets have already expanded on a previous relaxation | |
9769 | pass. | |
9770 | ||
9771 | Also, count each frag that may be used to help align the target. | |
9772 | ||
9773 | Return 0 if there are no frags left in the chain that need to be | |
9774 | aligned. */ | |
9775 | ||
9776 | static addressT | |
7fa3d080 BW |
9777 | find_address_of_next_align_frag (fragS **fragPP, |
9778 | int *wide_nops, | |
9779 | int *narrow_nops, | |
9780 | int *widens, | |
9781 | bfd_boolean *paddable) | |
e0001a05 | 9782 | { |
43cd72b9 BW |
9783 | fragS *fragP = *fragPP; |
9784 | addressT address = fragP->fr_address; | |
9785 | ||
9786 | /* Do not reset the counts to 0. */ | |
e0001a05 NC |
9787 | |
9788 | while (fragP) | |
9789 | { | |
9790 | /* Limit this to a small search. */ | |
b5e4a23d | 9791 | if (*widens >= (int) xtensa_fetch_width) |
43cd72b9 BW |
9792 | { |
9793 | *fragPP = fragP; | |
9794 | return 0; | |
9795 | } | |
e0001a05 NC |
9796 | address += fragP->fr_fix; |
9797 | ||
43cd72b9 BW |
9798 | if (fragP->fr_type == rs_fill) |
9799 | address += fragP->fr_offset * fragP->fr_var; | |
9800 | else if (fragP->fr_type == rs_machine_dependent) | |
e0001a05 | 9801 | { |
e0001a05 NC |
9802 | switch (fragP->fr_subtype) |
9803 | { | |
43cd72b9 BW |
9804 | case RELAX_UNREACHABLE: |
9805 | *paddable = TRUE; | |
9806 | break; | |
9807 | ||
9808 | case RELAX_FILL_NOP: | |
9809 | (*wide_nops)++; | |
9810 | if (!fragP->tc_frag_data.is_no_density) | |
9811 | (*narrow_nops)++; | |
9812 | break; | |
9813 | ||
9814 | case RELAX_SLOTS: | |
9815 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
9816 | { | |
9817 | (*widens)++; | |
9818 | break; | |
9819 | } | |
5bb3703f | 9820 | address += total_frag_text_expansion (fragP); |
e0001a05 NC |
9821 | break; |
9822 | ||
9823 | case RELAX_IMMED: | |
43cd72b9 | 9824 | address += fragP->tc_frag_data.text_expansion[0]; |
e0001a05 NC |
9825 | break; |
9826 | ||
9827 | case RELAX_ALIGN_NEXT_OPCODE: | |
9828 | case RELAX_DESIRE_ALIGN: | |
43cd72b9 BW |
9829 | *fragPP = fragP; |
9830 | return address; | |
9831 | ||
9832 | case RELAX_MAYBE_UNREACHABLE: | |
9833 | case RELAX_MAYBE_DESIRE_ALIGN: | |
9834 | /* Do nothing. */ | |
e0001a05 NC |
9835 | break; |
9836 | ||
9837 | default: | |
43cd72b9 BW |
9838 | /* Just punt if we don't know the type. */ |
9839 | *fragPP = fragP; | |
9840 | return 0; | |
e0001a05 | 9841 | } |
43cd72b9 | 9842 | } |
c138bc38 | 9843 | else |
43cd72b9 BW |
9844 | { |
9845 | /* Just punt if we don't know the type. */ | |
9846 | *fragPP = fragP; | |
9847 | return 0; | |
9848 | } | |
9849 | fragP = fragP->fr_next; | |
9850 | } | |
9851 | ||
9852 | *fragPP = fragP; | |
9853 | return 0; | |
9854 | } | |
9855 | ||
9856 | ||
7fa3d080 BW |
9857 | static long bytes_to_stretch (fragS *, int, int, int, int); |
9858 | ||
43cd72b9 | 9859 | static long |
7fa3d080 | 9860 | future_alignment_required (fragS *fragP, long stretch ATTRIBUTE_UNUSED) |
43cd72b9 BW |
9861 | { |
9862 | fragS *this_frag = fragP; | |
9863 | long address; | |
9864 | int num_widens = 0; | |
9865 | int wide_nops = 0; | |
9866 | int narrow_nops = 0; | |
9867 | bfd_boolean paddable = FALSE; | |
9868 | offsetT local_opt_diff; | |
9869 | offsetT opt_diff; | |
9870 | offsetT max_diff; | |
9871 | int stretch_amount = 0; | |
9872 | int local_stretch_amount; | |
9873 | int global_stretch_amount; | |
9874 | ||
7fa3d080 BW |
9875 | address = find_address_of_next_align_frag |
9876 | (&fragP, &wide_nops, &narrow_nops, &num_widens, &paddable); | |
43cd72b9 | 9877 | |
b5e4a23d BW |
9878 | if (!address) |
9879 | { | |
9880 | if (this_frag->tc_frag_data.is_aligning_branch) | |
9881 | this_frag->tc_frag_data.slot_subtypes[0] = RELAX_IMMED; | |
9882 | else | |
9883 | frag_wane (this_frag); | |
9884 | } | |
9885 | else | |
43cd72b9 BW |
9886 | { |
9887 | local_opt_diff = get_aligned_diff (fragP, address, &max_diff); | |
9888 | opt_diff = local_opt_diff; | |
9c2799c2 NC |
9889 | gas_assert (opt_diff >= 0); |
9890 | gas_assert (max_diff >= opt_diff); | |
c138bc38 | 9891 | if (max_diff == 0) |
43cd72b9 | 9892 | return 0; |
d2a033cd | 9893 | |
43cd72b9 BW |
9894 | if (fragP) |
9895 | fragP = fragP->fr_next; | |
9896 | ||
9897 | while (fragP && opt_diff < max_diff && address) | |
9898 | { | |
9899 | /* We only use these to determine if we can exit early | |
c138bc38 | 9900 | because there will be plenty of ways to align future |
43cd72b9 | 9901 | align frags. */ |
d77b99c9 | 9902 | int glob_widens = 0; |
43cd72b9 BW |
9903 | int dnn = 0; |
9904 | int dw = 0; | |
9905 | bfd_boolean glob_pad = 0; | |
7fa3d080 BW |
9906 | address = find_address_of_next_align_frag |
9907 | (&fragP, &glob_widens, &dnn, &dw, &glob_pad); | |
43cd72b9 | 9908 | /* If there is a padable portion, then skip. */ |
664df4e4 | 9909 | if (glob_pad || glob_widens >= (1 << branch_align_power (now_seg))) |
b5e4a23d | 9910 | address = 0; |
43cd72b9 | 9911 | |
c138bc38 | 9912 | if (address) |
43cd72b9 BW |
9913 | { |
9914 | offsetT next_m_diff; | |
9915 | offsetT next_o_diff; | |
9916 | ||
9917 | /* Downrange frags haven't had stretch added to them yet. */ | |
9918 | address += stretch; | |
9919 | ||
9920 | /* The address also includes any text expansion from this | |
9921 | frag in a previous pass, but we don't want that. */ | |
9922 | address -= this_frag->tc_frag_data.text_expansion[0]; | |
9923 | ||
9924 | /* Assume we are going to move at least opt_diff. In | |
9925 | reality, we might not be able to, but assuming that | |
9926 | we will helps catch cases where moving opt_diff pushes | |
9927 | the next target from aligned to unaligned. */ | |
9928 | address += opt_diff; | |
9929 | ||
9930 | next_o_diff = get_aligned_diff (fragP, address, &next_m_diff); | |
9931 | ||
9932 | /* Now cleanup for the adjustments to address. */ | |
9933 | next_o_diff += opt_diff; | |
9934 | next_m_diff += opt_diff; | |
9935 | if (next_o_diff <= max_diff && next_o_diff > opt_diff) | |
9936 | opt_diff = next_o_diff; | |
9937 | if (next_m_diff < max_diff) | |
9938 | max_diff = next_m_diff; | |
9939 | fragP = fragP->fr_next; | |
9940 | } | |
9941 | } | |
d2a033cd | 9942 | |
43cd72b9 BW |
9943 | /* If there are enough wideners in between, do it. */ |
9944 | if (paddable) | |
9945 | { | |
9946 | if (this_frag->fr_subtype == RELAX_UNREACHABLE) | |
9947 | { | |
1beeb686 | 9948 | gas_assert (opt_diff <= (signed) xtensa_fetch_width); |
43cd72b9 BW |
9949 | return opt_diff; |
9950 | } | |
9951 | return 0; | |
9952 | } | |
c138bc38 | 9953 | local_stretch_amount |
43cd72b9 BW |
9954 | = bytes_to_stretch (this_frag, wide_nops, narrow_nops, |
9955 | num_widens, local_opt_diff); | |
c138bc38 BW |
9956 | global_stretch_amount |
9957 | = bytes_to_stretch (this_frag, wide_nops, narrow_nops, | |
43cd72b9 | 9958 | num_widens, opt_diff); |
c138bc38 BW |
9959 | /* If the condition below is true, then the frag couldn't |
9960 | stretch the correct amount for the global case, so we just | |
9961 | optimize locally. We'll rely on the subsequent frags to get | |
43cd72b9 BW |
9962 | the correct alignment in the global case. */ |
9963 | if (global_stretch_amount < local_stretch_amount) | |
9964 | stretch_amount = local_stretch_amount; | |
9965 | else | |
9966 | stretch_amount = global_stretch_amount; | |
d2a033cd | 9967 | |
43cd72b9 BW |
9968 | if (this_frag->fr_subtype == RELAX_SLOTS |
9969 | && this_frag->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
9c2799c2 | 9970 | gas_assert (stretch_amount <= 1); |
43cd72b9 BW |
9971 | else if (this_frag->fr_subtype == RELAX_FILL_NOP) |
9972 | { | |
9973 | if (this_frag->tc_frag_data.is_no_density) | |
9c2799c2 | 9974 | gas_assert (stretch_amount == 3 || stretch_amount == 0); |
43cd72b9 | 9975 | else |
9c2799c2 | 9976 | gas_assert (stretch_amount <= 3); |
43cd72b9 BW |
9977 | } |
9978 | } | |
9979 | return stretch_amount; | |
9980 | } | |
9981 | ||
9982 | ||
9983 | /* The idea: widen everything you can to get a target or loop aligned, | |
9984 | then start using NOPs. | |
9985 | ||
43cd72b9 BW |
9986 | wide_nops = the number of wide NOPs available for aligning |
9987 | narrow_nops = the number of narrow NOPs available for aligning | |
9988 | (a subset of wide_nops) | |
9989 | widens = the number of narrow instructions that should be widened | |
9990 | ||
43cd72b9 BW |
9991 | */ |
9992 | ||
9993 | static long | |
7fa3d080 BW |
9994 | bytes_to_stretch (fragS *this_frag, |
9995 | int wide_nops, | |
9996 | int narrow_nops, | |
9997 | int num_widens, | |
9998 | int desired_diff) | |
43cd72b9 | 9999 | { |
19ef5f3d SA |
10000 | int nops_needed; |
10001 | int nop_bytes; | |
10002 | int extra_bytes; | |
43cd72b9 BW |
10003 | int bytes_short = desired_diff - num_widens; |
10004 | ||
3739860c | 10005 | gas_assert (desired_diff >= 0 |
1beeb686 | 10006 | && desired_diff < (signed) xtensa_fetch_width); |
43cd72b9 BW |
10007 | if (desired_diff == 0) |
10008 | return 0; | |
c138bc38 | 10009 | |
9c2799c2 | 10010 | gas_assert (wide_nops > 0 || num_widens > 0); |
e0001a05 | 10011 | |
43cd72b9 BW |
10012 | /* Always prefer widening to NOP-filling. */ |
10013 | if (bytes_short < 0) | |
10014 | { | |
10015 | /* There are enough RELAX_NARROW frags after this one | |
10016 | to align the target without widening this frag in any way. */ | |
10017 | return 0; | |
10018 | } | |
c138bc38 | 10019 | |
43cd72b9 BW |
10020 | if (bytes_short == 0) |
10021 | { | |
10022 | /* Widen every narrow between here and the align target | |
10023 | and the align target will be properly aligned. */ | |
10024 | if (this_frag->fr_subtype == RELAX_FILL_NOP) | |
10025 | return 0; | |
10026 | else | |
10027 | return 1; | |
10028 | } | |
c138bc38 | 10029 | |
43cd72b9 BW |
10030 | /* From here we will need at least one NOP to get an alignment. |
10031 | However, we may not be able to align at all, in which case, | |
10032 | don't widen. */ | |
19ef5f3d SA |
10033 | nops_needed = desired_diff / 3; |
10034 | ||
10035 | /* If there aren't enough nops, don't widen. */ | |
10036 | if (nops_needed > wide_nops) | |
10037 | return 0; | |
10038 | ||
10039 | /* First try it with all wide nops. */ | |
10040 | nop_bytes = nops_needed * 3; | |
10041 | extra_bytes = desired_diff - nop_bytes; | |
10042 | ||
10043 | if (nop_bytes + num_widens >= desired_diff) | |
43cd72b9 | 10044 | { |
19ef5f3d SA |
10045 | if (this_frag->fr_subtype == RELAX_FILL_NOP) |
10046 | return 3; | |
10047 | else if (num_widens == extra_bytes) | |
10048 | return 1; | |
10049 | return 0; | |
e0001a05 | 10050 | } |
19ef5f3d SA |
10051 | |
10052 | /* Add a narrow nop. */ | |
10053 | nops_needed++; | |
10054 | nop_bytes += 2; | |
10055 | extra_bytes -= 2; | |
10056 | if (narrow_nops == 0 || nops_needed > wide_nops) | |
10057 | return 0; | |
10058 | ||
10059 | if (nop_bytes + num_widens >= desired_diff && extra_bytes >= 0) | |
43cd72b9 | 10060 | { |
19ef5f3d SA |
10061 | if (this_frag->fr_subtype == RELAX_FILL_NOP) |
10062 | return !this_frag->tc_frag_data.is_no_density ? 2 : 3; | |
10063 | else if (num_widens == extra_bytes) | |
10064 | return 1; | |
10065 | return 0; | |
10066 | } | |
e0001a05 | 10067 | |
19ef5f3d SA |
10068 | /* Replace a wide nop with a narrow nop--we can get here if |
10069 | extra_bytes was negative in the previous conditional. */ | |
10070 | if (narrow_nops == 1) | |
10071 | return 0; | |
10072 | nop_bytes--; | |
10073 | extra_bytes++; | |
10074 | if (nop_bytes + num_widens >= desired_diff) | |
10075 | { | |
10076 | if (this_frag->fr_subtype == RELAX_FILL_NOP) | |
10077 | return !this_frag->tc_frag_data.is_no_density ? 2 : 3; | |
10078 | else if (num_widens == extra_bytes) | |
10079 | return 1; | |
10080 | return 0; | |
43cd72b9 | 10081 | } |
19ef5f3d SA |
10082 | |
10083 | /* If we can't satisfy any of the above cases, then we can't align | |
10084 | using padding or fill nops. */ | |
43cd72b9 | 10085 | return 0; |
e0001a05 NC |
10086 | } |
10087 | ||
10088 | ||
46888d71 | 10089 | static fragS * |
76a493ab | 10090 | xg_find_best_trampoline_for_tinsn (TInsn *tinsn, fragS *fragP) |
a82c7d90 | 10091 | { |
76a493ab MF |
10092 | symbolS *sym = tinsn->tok[0].X_add_symbol; |
10093 | addressT source = fragP->fr_address; | |
10094 | addressT target = S_GET_VALUE (sym) + tinsn->tok[0].X_add_number; | |
a82c7d90 | 10095 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); |
fe6c2f1b | 10096 | size_t i; |
a82c7d90 | 10097 | |
76a493ab MF |
10098 | if (!ts || !ts->index.n_entries) |
10099 | return NULL; | |
a82c7d90 | 10100 | |
76a493ab | 10101 | i = xg_find_best_trampoline (&ts->index, source, target); |
a82c7d90 | 10102 | |
76a493ab | 10103 | return ts->index.entry[i]; |
a82c7d90 DW |
10104 | } |
10105 | ||
10106 | ||
fe6c2f1b MF |
10107 | /* Append jump to sym + offset to the end of the trampoline frag fragP. |
10108 | Adjust fragP's jump around if it's present. Adjust fragP's fr_fix/fr_var | |
10109 | and finish the frag if it's full (but don't remove it from the trampoline | |
10110 | frag index). Return fixup for the newly created jump. */ | |
46888d71 | 10111 | static fixS *xg_append_jump (fragS *fragP, symbolS *sym, offsetT offset) |
fec68fb1 MF |
10112 | { |
10113 | fixS *fixP; | |
10114 | TInsn insn; | |
10115 | xtensa_format fmt; | |
10116 | xtensa_isa isa = xtensa_default_isa; | |
10117 | ||
10118 | gas_assert (fragP->fr_var >= 3); | |
10119 | tinsn_init (&insn); | |
10120 | insn.insn_type = ITYPE_INSN; | |
10121 | insn.opcode = xtensa_j_opcode; | |
10122 | insn.ntok = 1; | |
10123 | set_expr_symbol_offset (&insn.tok[0], sym, offset); | |
10124 | fmt = xg_get_single_format (xtensa_j_opcode); | |
10125 | tinsn_to_slotbuf (fmt, 0, &insn, trampoline_slotbuf); | |
10126 | xtensa_format_set_slot (isa, fmt, 0, trampoline_buf, trampoline_slotbuf); | |
10127 | xtensa_insnbuf_to_chars (isa, trampoline_buf, | |
10128 | (unsigned char *)fragP->fr_literal + fragP->fr_fix, 3); | |
10129 | fixP = fix_new (fragP, fragP->fr_fix, 3, sym, offset, TRUE, | |
10130 | BFD_RELOC_XTENSA_SLOT0_OP); | |
10131 | fixP->tc_fix_data.slot = 0; | |
10132 | ||
10133 | fragP->fr_fix += 3; | |
10134 | fragP->fr_var -= 3; | |
10135 | ||
10136 | /* Adjust the jump around this trampoline (if present). */ | |
46888d71 MF |
10137 | if (fragP->tc_frag_data.jump_around_fix) |
10138 | fragP->tc_frag_data.jump_around_fix->fx_offset += 3; | |
fec68fb1 | 10139 | |
fe6c2f1b MF |
10140 | /* Do we have room for more? */ |
10141 | if (xg_is_trampoline_frag_full (fragP)) | |
10142 | { | |
10143 | frag_wane (fragP); | |
10144 | fragP->fr_subtype = 0; | |
10145 | } | |
10146 | ||
fec68fb1 MF |
10147 | return fixP; |
10148 | } | |
10149 | ||
a82c7d90 DW |
10150 | |
10151 | static int | |
46888d71 | 10152 | init_trampoline_frag (fragS *fp) |
a82c7d90 | 10153 | { |
a82c7d90 DW |
10154 | int growth = 0; |
10155 | ||
10156 | if (fp->fr_fix == 0) | |
10157 | { | |
10158 | symbolS *lsym; | |
10159 | char label[10 + 2 * sizeof(fp)]; | |
a82c7d90 | 10160 | |
fec68fb1 | 10161 | sprintf (label, ".L0_TR_%p", fp); |
a82c7d90 DW |
10162 | lsym = (symbolS *)local_symbol_make (label, now_seg, 0, fp); |
10163 | fp->fr_symbol = lsym; | |
46888d71 | 10164 | if (fp->tc_frag_data.needs_jump_around) |
a82c7d90 | 10165 | { |
46888d71 | 10166 | fp->tc_frag_data.jump_around_fix = xg_append_jump (fp, lsym, 3); |
a82c7d90 | 10167 | growth = 3; |
a82c7d90 DW |
10168 | } |
10169 | } | |
10170 | return growth; | |
10171 | } | |
10172 | ||
a82c7d90 | 10173 | static int |
148d6384 | 10174 | xg_get_single_symbol_slot (fragS *fragP) |
a82c7d90 | 10175 | { |
148d6384 MF |
10176 | int i; |
10177 | int slot = -1; | |
24e5b4e6 MF |
10178 | |
10179 | for (i = 0; i < MAX_SLOTS; ++i) | |
148d6384 | 10180 | if (fragP->tc_frag_data.slot_symbols[i]) |
24e5b4e6 MF |
10181 | { |
10182 | gas_assert (slot == -1); | |
10183 | slot = i; | |
10184 | } | |
10185 | ||
10186 | gas_assert (slot >= 0 && slot < MAX_SLOTS); | |
a82c7d90 | 10187 | |
148d6384 MF |
10188 | return slot; |
10189 | } | |
10190 | ||
10191 | static fixS * | |
10192 | add_jump_to_trampoline (fragS *tramp, fragS *origfrag) | |
10193 | { | |
10194 | int slot = xg_get_single_symbol_slot (origfrag); | |
10195 | fixS *fixP; | |
10196 | ||
a82c7d90 | 10197 | /* Assemble a jump to the target label in the trampoline frag. */ |
148d6384 MF |
10198 | fixP = xg_append_jump (tramp, |
10199 | origfrag->tc_frag_data.slot_symbols[slot], | |
10200 | origfrag->tc_frag_data.slot_offsets[slot]); | |
fec68fb1 | 10201 | |
a82c7d90 | 10202 | /* Modify the original j to point here. */ |
fec68fb1 | 10203 | origfrag->tc_frag_data.slot_symbols[slot] = tramp->fr_symbol; |
24e5b4e6 | 10204 | origfrag->tc_frag_data.slot_offsets[slot] = tramp->fr_fix - 3; |
fec68fb1 | 10205 | |
a82c7d90 | 10206 | /* If trampoline is full, remove it from the list. */ |
fe6c2f1b MF |
10207 | if (xg_is_trampoline_frag_full (tramp)) |
10208 | { | |
10209 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); | |
10210 | size_t tr = xg_find_trampoline (&ts->index, tramp->fr_address); | |
10211 | ||
10212 | gas_assert (ts->index.entry[tr] == tramp); | |
10213 | xg_remove_trampoline_from_index (&ts->index, tr); | |
10214 | } | |
a82c7d90 | 10215 | |
148d6384 | 10216 | return fixP; |
a82c7d90 DW |
10217 | } |
10218 | ||
10219 | ||
e0001a05 | 10220 | static long |
7fa3d080 BW |
10221 | relax_frag_immed (segT segP, |
10222 | fragS *fragP, | |
10223 | long stretch, | |
10224 | int min_steps, | |
10225 | xtensa_format fmt, | |
10226 | int slot, | |
10227 | int *stretched_p, | |
10228 | bfd_boolean estimate_only) | |
e0001a05 | 10229 | { |
43cd72b9 | 10230 | TInsn tinsn; |
e0001a05 NC |
10231 | int old_size; |
10232 | bfd_boolean negatable_branch = FALSE; | |
10233 | bfd_boolean branch_jmp_to_next = FALSE; | |
def13efb | 10234 | bfd_boolean from_wide_insn = FALSE; |
43cd72b9 | 10235 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
10236 | IStack istack; |
10237 | offsetT frag_offset; | |
10238 | int num_steps; | |
e0001a05 | 10239 | int num_text_bytes, num_literal_bytes; |
2276bc20 | 10240 | int literal_diff, total_text_diff, this_text_diff; |
e0001a05 | 10241 | |
9c2799c2 | 10242 | gas_assert (fragP->fr_opcode != NULL); |
e0001a05 | 10243 | |
b5e4a23d BW |
10244 | xg_clear_vinsn (&cur_vinsn); |
10245 | vinsn_from_chars (&cur_vinsn, fragP->fr_opcode); | |
b2d179be | 10246 | if (cur_vinsn.num_slots > 1) |
def13efb | 10247 | from_wide_insn = TRUE; |
43cd72b9 | 10248 | |
b5e4a23d | 10249 | tinsn = cur_vinsn.slots[slot]; |
43cd72b9 | 10250 | tinsn_immed_from_frag (&tinsn, fragP, slot); |
e0001a05 | 10251 | |
64b607e6 | 10252 | if (estimate_only && xtensa_opcode_is_loop (isa, tinsn.opcode) == 1) |
43cd72b9 | 10253 | return 0; |
e0001a05 | 10254 | |
b08b5071 | 10255 | if (workaround_b_j_loop_end && ! fragP->tc_frag_data.is_no_transform) |
43cd72b9 | 10256 | branch_jmp_to_next = is_branch_jmp_to_next (&tinsn, fragP); |
e0001a05 | 10257 | |
43cd72b9 | 10258 | negatable_branch = (xtensa_opcode_is_branch (isa, tinsn.opcode) == 1); |
e0001a05 | 10259 | |
43cd72b9 | 10260 | old_size = xtensa_format_length (isa, fmt); |
e0001a05 NC |
10261 | |
10262 | /* Special case: replace a branch to the next instruction with a NOP. | |
10263 | This is required to work around a hardware bug in T1040.0 and also | |
10264 | serves as an optimization. */ | |
10265 | ||
10266 | if (branch_jmp_to_next | |
10267 | && ((old_size == 2) || (old_size == 3)) | |
10268 | && !next_frag_is_loop_target (fragP)) | |
10269 | return 0; | |
10270 | ||
10271 | /* Here is the fun stuff: Get the immediate field from this | |
10272 | instruction. If it fits, we are done. If not, find the next | |
10273 | instruction sequence that fits. */ | |
10274 | ||
10275 | frag_offset = fragP->fr_opcode - fragP->fr_literal; | |
10276 | istack_init (&istack); | |
43cd72b9 | 10277 | num_steps = xg_assembly_relax (&istack, &tinsn, segP, fragP, frag_offset, |
e0001a05 | 10278 | min_steps, stretch); |
9c2799c2 | 10279 | gas_assert (num_steps >= min_steps && num_steps <= RELAX_IMMED_MAXSTEPS); |
e0001a05 | 10280 | |
43cd72b9 | 10281 | fragP->tc_frag_data.slot_subtypes[slot] = (int) RELAX_IMMED + num_steps; |
e0001a05 NC |
10282 | |
10283 | /* Figure out the number of bytes needed. */ | |
e0001a05 | 10284 | num_literal_bytes = get_num_stack_literal_bytes (&istack); |
2276bc20 BW |
10285 | literal_diff |
10286 | = num_literal_bytes - fragP->tc_frag_data.literal_expansion[slot]; | |
43cd72b9 | 10287 | num_text_bytes = get_num_stack_text_bytes (&istack); |
def13efb BW |
10288 | |
10289 | if (from_wide_insn) | |
43cd72b9 | 10290 | { |
2276bc20 BW |
10291 | int first = 0; |
10292 | while (istack.insn[first].opcode == XTENSA_UNDEFINED) | |
10293 | first++; | |
10294 | ||
43cd72b9 BW |
10295 | num_text_bytes += old_size; |
10296 | if (opcode_fits_format_slot (istack.insn[first].opcode, fmt, slot)) | |
10297 | num_text_bytes -= xg_get_single_size (istack.insn[first].opcode); | |
2276bc20 BW |
10298 | else |
10299 | { | |
10300 | /* The first instruction in the relaxed sequence will go after | |
10301 | the current wide instruction, and thus its symbolic immediates | |
10302 | might not fit. */ | |
3739860c | 10303 | |
2276bc20 | 10304 | istack_init (&istack); |
3739860c | 10305 | num_steps = xg_assembly_relax (&istack, &tinsn, segP, fragP, |
2276bc20 BW |
10306 | frag_offset + old_size, |
10307 | min_steps, stretch + old_size); | |
9c2799c2 | 10308 | gas_assert (num_steps >= min_steps && num_steps <= RELAX_IMMED_MAXSTEPS); |
2276bc20 | 10309 | |
3739860c | 10310 | fragP->tc_frag_data.slot_subtypes[slot] |
2276bc20 BW |
10311 | = (int) RELAX_IMMED + num_steps; |
10312 | ||
10313 | num_literal_bytes = get_num_stack_literal_bytes (&istack); | |
3739860c | 10314 | literal_diff |
2276bc20 | 10315 | = num_literal_bytes - fragP->tc_frag_data.literal_expansion[slot]; |
3739860c | 10316 | |
2276bc20 BW |
10317 | num_text_bytes = get_num_stack_text_bytes (&istack) + old_size; |
10318 | } | |
43cd72b9 | 10319 | } |
def13efb | 10320 | |
43cd72b9 BW |
10321 | total_text_diff = num_text_bytes - old_size; |
10322 | this_text_diff = total_text_diff - fragP->tc_frag_data.text_expansion[slot]; | |
e0001a05 NC |
10323 | |
10324 | /* It MUST get larger. If not, we could get an infinite loop. */ | |
9c2799c2 NC |
10325 | gas_assert (num_text_bytes >= 0); |
10326 | gas_assert (literal_diff >= 0); | |
10327 | gas_assert (total_text_diff >= 0); | |
e0001a05 | 10328 | |
43cd72b9 BW |
10329 | fragP->tc_frag_data.text_expansion[slot] = total_text_diff; |
10330 | fragP->tc_frag_data.literal_expansion[slot] = num_literal_bytes; | |
9c2799c2 NC |
10331 | gas_assert (fragP->tc_frag_data.text_expansion[slot] >= 0); |
10332 | gas_assert (fragP->tc_frag_data.literal_expansion[slot] >= 0); | |
e0001a05 NC |
10333 | |
10334 | /* Find the associated expandable literal for this. */ | |
10335 | if (literal_diff != 0) | |
10336 | { | |
2276bc20 | 10337 | fragS *lit_fragP = fragP->tc_frag_data.literal_frags[slot]; |
e0001a05 NC |
10338 | if (lit_fragP) |
10339 | { | |
9c2799c2 | 10340 | gas_assert (literal_diff == 4); |
e0001a05 NC |
10341 | lit_fragP->tc_frag_data.unreported_expansion += literal_diff; |
10342 | ||
10343 | /* We expect that the literal section state has NOT been | |
10344 | modified yet. */ | |
9c2799c2 | 10345 | gas_assert (lit_fragP->fr_type == rs_machine_dependent |
e0001a05 NC |
10346 | && lit_fragP->fr_subtype == RELAX_LITERAL); |
10347 | lit_fragP->fr_subtype = RELAX_LITERAL_NR; | |
10348 | ||
10349 | /* We need to mark this section for another iteration | |
10350 | of relaxation. */ | |
10351 | (*stretched_p)++; | |
10352 | } | |
10353 | } | |
10354 | ||
43cd72b9 | 10355 | if (negatable_branch && istack.ninsn > 1) |
1d19a770 | 10356 | update_next_frag_state (fragP); |
e0001a05 | 10357 | |
a82c7d90 DW |
10358 | /* If last insn is a jump, and it cannot reach its target, try to find a trampoline. */ |
10359 | if (istack.ninsn > 2 && | |
10360 | istack.insn[istack.ninsn - 1].insn_type == ITYPE_LABEL && | |
10361 | istack.insn[istack.ninsn - 2].insn_type == ITYPE_INSN && | |
10362 | istack.insn[istack.ninsn - 2].opcode == xtensa_j_opcode) | |
10363 | { | |
10364 | TInsn *jinsn = &istack.insn[istack.ninsn - 2]; | |
148d6384 MF |
10365 | struct trampoline_seg *ts = find_trampoline_seg (segP); |
10366 | struct trampoline_chain *tc = NULL; | |
10367 | ||
10368 | if (ts && | |
10369 | !xg_symbolic_immeds_fit (jinsn, segP, fragP, fragP->fr_offset, | |
10370 | total_text_diff)) | |
10371 | { | |
10372 | int s = xg_get_single_symbol_slot (fragP); | |
10373 | addressT offset = fragP->tc_frag_data.slot_offsets[s]; | |
10374 | ||
10375 | tc = xg_find_best_eq_target (ts, fragP->fr_address, | |
10376 | &fragP->tc_frag_data.slot_symbols[s], | |
10377 | &offset); | |
10378 | ||
10379 | if (!tc) | |
10380 | tc = xg_create_trampoline_chain (ts, | |
10381 | fragP->tc_frag_data.slot_symbols[s], | |
10382 | offset); | |
10383 | fragP->tc_frag_data.slot_offsets[s] = offset; | |
10384 | tinsn_immed_from_frag (jinsn, fragP, s); | |
10385 | } | |
a82c7d90 | 10386 | |
148d6384 MF |
10387 | if (!xg_symbolic_immeds_fit (jinsn, segP, fragP, fragP->fr_offset, |
10388 | total_text_diff)) | |
a82c7d90 | 10389 | { |
76a493ab | 10390 | fragS *tf = xg_find_best_trampoline_for_tinsn (jinsn, fragP); |
a82c7d90 DW |
10391 | |
10392 | if (tf) | |
10393 | { | |
148d6384 MF |
10394 | fixS *fixP; |
10395 | ||
10396 | this_text_diff += init_trampoline_frag (tf) + 3; | |
10397 | fixP = add_jump_to_trampoline (tf, fragP); | |
10398 | xg_add_location_to_chain (tc, fixP->fx_frag->fr_symbol, | |
10399 | fixP->fx_where); | |
10400 | fragP->tc_frag_data.relax_seen = FALSE; | |
a82c7d90 DW |
10401 | } |
10402 | else | |
10403 | { | |
10404 | /* If target symbol is undefined, assume it will reach once linked. */ | |
10405 | expressionS *exp = &istack.insn[istack.ninsn - 2].tok[0]; | |
10406 | ||
10407 | if (exp->X_op == O_symbol && S_IS_DEFINED (exp->X_add_symbol)) | |
10408 | { | |
10409 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
10410 | _("jump target out of range; no usable trampoline found")); | |
10411 | } | |
10412 | } | |
10413 | } | |
10414 | } | |
10415 | ||
43cd72b9 | 10416 | return this_text_diff; |
e0001a05 NC |
10417 | } |
10418 | ||
10419 | \f | |
10420 | /* md_convert_frag Hook and Helper Functions. */ | |
10421 | ||
7fa3d080 BW |
10422 | static void convert_frag_align_next_opcode (fragS *); |
10423 | static void convert_frag_narrow (segT, fragS *, xtensa_format, int); | |
10424 | static void convert_frag_fill_nop (fragS *); | |
10425 | static void convert_frag_immed (segT, fragS *, int, xtensa_format, int); | |
10426 | ||
e0001a05 | 10427 | void |
7fa3d080 | 10428 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT sec, fragS *fragp) |
e0001a05 | 10429 | { |
43cd72b9 BW |
10430 | static xtensa_insnbuf vbuf = NULL; |
10431 | xtensa_isa isa = xtensa_default_isa; | |
10432 | int slot; | |
10433 | int num_slots; | |
10434 | xtensa_format fmt; | |
3b4dbbbf | 10435 | const char *file_name; |
d77b99c9 | 10436 | unsigned line; |
e0001a05 | 10437 | |
3b4dbbbf | 10438 | file_name = as_where (&line); |
e0001a05 NC |
10439 | new_logical_line (fragp->fr_file, fragp->fr_line); |
10440 | ||
10441 | switch (fragp->fr_subtype) | |
10442 | { | |
10443 | case RELAX_ALIGN_NEXT_OPCODE: | |
10444 | /* Always convert. */ | |
10445 | convert_frag_align_next_opcode (fragp); | |
10446 | break; | |
10447 | ||
10448 | case RELAX_DESIRE_ALIGN: | |
10449 | /* Do nothing. If not aligned already, too bad. */ | |
10450 | break; | |
10451 | ||
43cd72b9 BW |
10452 | case RELAX_LITERAL: |
10453 | case RELAX_LITERAL_FINAL: | |
10454 | break; | |
10455 | ||
10456 | case RELAX_SLOTS: | |
10457 | if (vbuf == NULL) | |
10458 | vbuf = xtensa_insnbuf_alloc (isa); | |
10459 | ||
d77b99c9 BW |
10460 | xtensa_insnbuf_from_chars |
10461 | (isa, vbuf, (unsigned char *) fragp->fr_opcode, 0); | |
43cd72b9 BW |
10462 | fmt = xtensa_format_decode (isa, vbuf); |
10463 | num_slots = xtensa_format_num_slots (isa, fmt); | |
10464 | ||
10465 | for (slot = 0; slot < num_slots; slot++) | |
10466 | { | |
10467 | switch (fragp->tc_frag_data.slot_subtypes[slot]) | |
10468 | { | |
10469 | case RELAX_NARROW: | |
10470 | convert_frag_narrow (sec, fragp, fmt, slot); | |
10471 | break; | |
10472 | ||
10473 | case RELAX_IMMED: | |
10474 | case RELAX_IMMED_STEP1: | |
10475 | case RELAX_IMMED_STEP2: | |
b81bf389 | 10476 | case RELAX_IMMED_STEP3: |
43cd72b9 BW |
10477 | /* Place the immediate. */ |
10478 | convert_frag_immed | |
10479 | (sec, fragp, | |
10480 | fragp->tc_frag_data.slot_subtypes[slot] - RELAX_IMMED, | |
10481 | fmt, slot); | |
10482 | break; | |
10483 | ||
10484 | default: | |
10485 | /* This is OK because some slots could have | |
10486 | relaxations and others have none. */ | |
10487 | break; | |
10488 | } | |
10489 | } | |
10490 | break; | |
10491 | ||
10492 | case RELAX_UNREACHABLE: | |
10493 | memset (&fragp->fr_literal[fragp->fr_fix], 0, fragp->fr_var); | |
10494 | fragp->fr_fix += fragp->tc_frag_data.text_expansion[0]; | |
10495 | fragp->fr_var -= fragp->tc_frag_data.text_expansion[0]; | |
10496 | frag_wane (fragp); | |
e0001a05 NC |
10497 | break; |
10498 | ||
43cd72b9 BW |
10499 | case RELAX_MAYBE_UNREACHABLE: |
10500 | case RELAX_MAYBE_DESIRE_ALIGN: | |
10501 | frag_wane (fragp); | |
e0001a05 NC |
10502 | break; |
10503 | ||
43cd72b9 BW |
10504 | case RELAX_FILL_NOP: |
10505 | convert_frag_fill_nop (fragp); | |
e0001a05 NC |
10506 | break; |
10507 | ||
10508 | case RELAX_LITERAL_NR: | |
10509 | if (use_literal_section) | |
10510 | { | |
10511 | /* This should have been handled during relaxation. When | |
10512 | relaxing a code segment, literals sometimes need to be | |
10513 | added to the corresponding literal segment. If that | |
10514 | literal segment has already been relaxed, then we end up | |
10515 | in this situation. Marking the literal segments as data | |
10516 | would make this happen less often (since GAS always relaxes | |
10517 | code before data), but we could still get into trouble if | |
10518 | there are instructions in a segment that is not marked as | |
10519 | containing code. Until we can implement a better solution, | |
10520 | cheat and adjust the addresses of all the following frags. | |
10521 | This could break subsequent alignments, but the linker's | |
10522 | literal coalescing will do that anyway. */ | |
10523 | ||
10524 | fragS *f; | |
10525 | fragp->fr_subtype = RELAX_LITERAL_FINAL; | |
9c2799c2 | 10526 | gas_assert (fragp->tc_frag_data.unreported_expansion == 4); |
e0001a05 NC |
10527 | memset (&fragp->fr_literal[fragp->fr_fix], 0, 4); |
10528 | fragp->fr_var -= 4; | |
10529 | fragp->fr_fix += 4; | |
10530 | for (f = fragp->fr_next; f; f = f->fr_next) | |
10531 | f->fr_address += 4; | |
10532 | } | |
10533 | else | |
10534 | as_bad (_("invalid relaxation fragment result")); | |
10535 | break; | |
a82c7d90 DW |
10536 | |
10537 | case RELAX_TRAMPOLINE: | |
10538 | break; | |
e0001a05 NC |
10539 | } |
10540 | ||
10541 | fragp->fr_var = 0; | |
10542 | new_logical_line (file_name, line); | |
10543 | } | |
10544 | ||
10545 | ||
7fa3d080 BW |
10546 | static void |
10547 | convert_frag_align_next_opcode (fragS *fragp) | |
e0001a05 NC |
10548 | { |
10549 | char *nop_buf; /* Location for Writing. */ | |
e0001a05 NC |
10550 | bfd_boolean use_no_density = fragp->tc_frag_data.is_no_density; |
10551 | addressT aligned_address; | |
d77b99c9 BW |
10552 | offsetT fill_size; |
10553 | int nop, nop_count; | |
e0001a05 NC |
10554 | |
10555 | aligned_address = get_noop_aligned_address (fragp, fragp->fr_address + | |
10556 | fragp->fr_fix); | |
10557 | fill_size = aligned_address - (fragp->fr_address + fragp->fr_fix); | |
10558 | nop_count = get_text_align_nop_count (fill_size, use_no_density); | |
10559 | nop_buf = fragp->fr_literal + fragp->fr_fix; | |
10560 | ||
d77b99c9 | 10561 | for (nop = 0; nop < nop_count; nop++) |
e0001a05 | 10562 | { |
d77b99c9 BW |
10563 | int nop_size; |
10564 | nop_size = get_text_align_nth_nop_size (fill_size, nop, use_no_density); | |
e0001a05 NC |
10565 | |
10566 | assemble_nop (nop_size, nop_buf); | |
10567 | nop_buf += nop_size; | |
10568 | } | |
10569 | ||
10570 | fragp->fr_fix += fill_size; | |
10571 | fragp->fr_var -= fill_size; | |
10572 | } | |
10573 | ||
10574 | ||
10575 | static void | |
7fa3d080 | 10576 | convert_frag_narrow (segT segP, fragS *fragP, xtensa_format fmt, int slot) |
e0001a05 | 10577 | { |
43cd72b9 | 10578 | TInsn tinsn, single_target; |
84b08ed9 | 10579 | int size, old_size, diff; |
e0001a05 NC |
10580 | offsetT frag_offset; |
10581 | ||
9c2799c2 | 10582 | gas_assert (slot == 0); |
43cd72b9 BW |
10583 | tinsn_from_chars (&tinsn, fragP->fr_opcode, 0); |
10584 | ||
b5e4a23d | 10585 | if (fragP->tc_frag_data.is_aligning_branch == 1) |
43cd72b9 | 10586 | { |
9c2799c2 | 10587 | gas_assert (fragP->tc_frag_data.text_expansion[0] == 1 |
43cd72b9 BW |
10588 | || fragP->tc_frag_data.text_expansion[0] == 0); |
10589 | convert_frag_immed (segP, fragP, fragP->tc_frag_data.text_expansion[0], | |
10590 | fmt, slot); | |
10591 | return; | |
10592 | } | |
10593 | ||
10594 | if (fragP->tc_frag_data.text_expansion[0] == 0) | |
e0001a05 NC |
10595 | { |
10596 | /* No conversion. */ | |
10597 | fragP->fr_var = 0; | |
10598 | return; | |
10599 | } | |
10600 | ||
9c2799c2 | 10601 | gas_assert (fragP->fr_opcode != NULL); |
e0001a05 | 10602 | |
43cd72b9 BW |
10603 | /* Frags in this relaxation state should only contain |
10604 | single instruction bundles. */ | |
10605 | tinsn_immed_from_frag (&tinsn, fragP, 0); | |
e0001a05 NC |
10606 | |
10607 | /* Just convert it to a wide form.... */ | |
10608 | size = 0; | |
43cd72b9 | 10609 | old_size = xg_get_single_size (tinsn.opcode); |
e0001a05 NC |
10610 | |
10611 | tinsn_init (&single_target); | |
10612 | frag_offset = fragP->fr_opcode - fragP->fr_literal; | |
10613 | ||
84b08ed9 | 10614 | if (! xg_is_single_relaxable_insn (&tinsn, &single_target, FALSE)) |
43cd72b9 BW |
10615 | { |
10616 | as_bad (_("unable to widen instruction")); | |
10617 | return; | |
10618 | } | |
10619 | ||
10620 | size = xg_get_single_size (single_target.opcode); | |
b2d179be BW |
10621 | xg_emit_insn_to_buf (&single_target, fragP->fr_opcode, fragP, |
10622 | frag_offset, TRUE); | |
e0001a05 NC |
10623 | |
10624 | diff = size - old_size; | |
9c2799c2 NC |
10625 | gas_assert (diff >= 0); |
10626 | gas_assert (diff <= fragP->fr_var); | |
e0001a05 NC |
10627 | fragP->fr_var -= diff; |
10628 | fragP->fr_fix += diff; | |
10629 | ||
10630 | /* clean it up */ | |
10631 | fragP->fr_var = 0; | |
10632 | } | |
10633 | ||
10634 | ||
10635 | static void | |
7fa3d080 | 10636 | convert_frag_fill_nop (fragS *fragP) |
43cd72b9 BW |
10637 | { |
10638 | char *loc = &fragP->fr_literal[fragP->fr_fix]; | |
10639 | int size = fragP->tc_frag_data.text_expansion[0]; | |
9c2799c2 | 10640 | gas_assert ((unsigned) size == (fragP->fr_next->fr_address |
43cd72b9 BW |
10641 | - fragP->fr_address - fragP->fr_fix)); |
10642 | if (size == 0) | |
10643 | { | |
10644 | /* No conversion. */ | |
10645 | fragP->fr_var = 0; | |
10646 | return; | |
10647 | } | |
10648 | assemble_nop (size, loc); | |
10649 | fragP->tc_frag_data.is_insn = TRUE; | |
10650 | fragP->fr_var -= size; | |
10651 | fragP->fr_fix += size; | |
10652 | frag_wane (fragP); | |
10653 | } | |
10654 | ||
10655 | ||
7fa3d080 BW |
10656 | static fixS *fix_new_exp_in_seg |
10657 | (segT, subsegT, fragS *, int, int, expressionS *, int, | |
10658 | bfd_reloc_code_real_type); | |
7fa3d080 | 10659 | |
43cd72b9 | 10660 | static void |
7fa3d080 BW |
10661 | convert_frag_immed (segT segP, |
10662 | fragS *fragP, | |
10663 | int min_steps, | |
10664 | xtensa_format fmt, | |
10665 | int slot) | |
e0001a05 NC |
10666 | { |
10667 | char *immed_instr = fragP->fr_opcode; | |
43cd72b9 | 10668 | TInsn orig_tinsn; |
e0001a05 | 10669 | bfd_boolean expanded = FALSE; |
e0001a05 | 10670 | bfd_boolean branch_jmp_to_next = FALSE; |
43cd72b9 | 10671 | char *fr_opcode = fragP->fr_opcode; |
43cd72b9 | 10672 | xtensa_isa isa = xtensa_default_isa; |
def13efb | 10673 | bfd_boolean from_wide_insn = FALSE; |
43cd72b9 BW |
10674 | int bytes; |
10675 | bfd_boolean is_loop; | |
e0001a05 | 10676 | |
9c2799c2 | 10677 | gas_assert (fr_opcode != NULL); |
e0001a05 | 10678 | |
b5e4a23d | 10679 | xg_clear_vinsn (&cur_vinsn); |
e0001a05 | 10680 | |
b5e4a23d | 10681 | vinsn_from_chars (&cur_vinsn, fr_opcode); |
b2d179be | 10682 | if (cur_vinsn.num_slots > 1) |
def13efb | 10683 | from_wide_insn = TRUE; |
e0001a05 | 10684 | |
b5e4a23d | 10685 | orig_tinsn = cur_vinsn.slots[slot]; |
43cd72b9 BW |
10686 | tinsn_immed_from_frag (&orig_tinsn, fragP, slot); |
10687 | ||
10688 | is_loop = xtensa_opcode_is_loop (xtensa_default_isa, orig_tinsn.opcode) == 1; | |
e0001a05 | 10689 | |
b08b5071 | 10690 | if (workaround_b_j_loop_end && ! fragP->tc_frag_data.is_no_transform) |
43cd72b9 | 10691 | branch_jmp_to_next = is_branch_jmp_to_next (&orig_tinsn, fragP); |
e0001a05 NC |
10692 | |
10693 | if (branch_jmp_to_next && !next_frag_is_loop_target (fragP)) | |
10694 | { | |
10695 | /* Conversion just inserts a NOP and marks the fix as completed. */ | |
43cd72b9 BW |
10696 | bytes = xtensa_format_length (isa, fmt); |
10697 | if (bytes >= 4) | |
10698 | { | |
b5e4a23d BW |
10699 | cur_vinsn.slots[slot].opcode = |
10700 | xtensa_format_slot_nop_opcode (isa, cur_vinsn.format, slot); | |
10701 | cur_vinsn.slots[slot].ntok = 0; | |
43cd72b9 BW |
10702 | } |
10703 | else | |
10704 | { | |
10705 | bytes += fragP->tc_frag_data.text_expansion[0]; | |
9c2799c2 | 10706 | gas_assert (bytes == 2 || bytes == 3); |
b5e4a23d | 10707 | build_nop (&cur_vinsn.slots[0], bytes); |
43cd72b9 BW |
10708 | fragP->fr_fix += fragP->tc_frag_data.text_expansion[0]; |
10709 | } | |
e7da6241 | 10710 | vinsn_to_insnbuf (&cur_vinsn, fr_opcode, frag_now, TRUE); |
d77b99c9 | 10711 | xtensa_insnbuf_to_chars |
b5e4a23d | 10712 | (isa, cur_vinsn.insnbuf, (unsigned char *) fr_opcode, 0); |
e0001a05 NC |
10713 | fragP->fr_var = 0; |
10714 | } | |
7c834684 | 10715 | else |
e0001a05 | 10716 | { |
43cd72b9 BW |
10717 | /* Here is the fun stuff: Get the immediate field from this |
10718 | instruction. If it fits, we're done. If not, find the next | |
10719 | instruction sequence that fits. */ | |
10720 | ||
e0001a05 NC |
10721 | IStack istack; |
10722 | int i; | |
10723 | symbolS *lit_sym = NULL; | |
10724 | int total_size = 0; | |
43cd72b9 | 10725 | int target_offset = 0; |
e0001a05 NC |
10726 | int old_size; |
10727 | int diff; | |
10728 | symbolS *gen_label = NULL; | |
10729 | offsetT frag_offset; | |
43cd72b9 | 10730 | bfd_boolean first = TRUE; |
e0001a05 | 10731 | |
43cd72b9 | 10732 | /* It does not fit. Find something that does and |
e0001a05 | 10733 | convert immediately. */ |
43cd72b9 | 10734 | frag_offset = fr_opcode - fragP->fr_literal; |
e0001a05 | 10735 | istack_init (&istack); |
43cd72b9 | 10736 | xg_assembly_relax (&istack, &orig_tinsn, |
e0001a05 NC |
10737 | segP, fragP, frag_offset, min_steps, 0); |
10738 | ||
43cd72b9 | 10739 | old_size = xtensa_format_length (isa, fmt); |
e0001a05 NC |
10740 | |
10741 | /* Assemble this right inline. */ | |
10742 | ||
10743 | /* First, create the mapping from a label name to the REAL label. */ | |
43cd72b9 | 10744 | target_offset = 0; |
e0001a05 NC |
10745 | for (i = 0; i < istack.ninsn; i++) |
10746 | { | |
43cd72b9 | 10747 | TInsn *tinsn = &istack.insn[i]; |
e0001a05 NC |
10748 | fragS *lit_frag; |
10749 | ||
43cd72b9 | 10750 | switch (tinsn->insn_type) |
e0001a05 NC |
10751 | { |
10752 | case ITYPE_LITERAL: | |
10753 | if (lit_sym != NULL) | |
10754 | as_bad (_("multiple literals in expansion")); | |
10755 | /* First find the appropriate space in the literal pool. */ | |
43cd72b9 | 10756 | lit_frag = fragP->tc_frag_data.literal_frags[slot]; |
e0001a05 NC |
10757 | if (lit_frag == NULL) |
10758 | as_bad (_("no registered fragment for literal")); | |
43cd72b9 | 10759 | if (tinsn->ntok != 1) |
e0001a05 NC |
10760 | as_bad (_("number of literal tokens != 1")); |
10761 | ||
10762 | /* Set the literal symbol and add a fixup. */ | |
10763 | lit_sym = lit_frag->fr_symbol; | |
10764 | break; | |
10765 | ||
10766 | case ITYPE_LABEL: | |
43cd72b9 BW |
10767 | if (align_targets && !is_loop) |
10768 | { | |
10769 | fragS *unreach = fragP->fr_next; | |
10770 | while (!(unreach->fr_type == rs_machine_dependent | |
10771 | && (unreach->fr_subtype == RELAX_MAYBE_UNREACHABLE | |
10772 | || unreach->fr_subtype == RELAX_UNREACHABLE))) | |
10773 | { | |
10774 | unreach = unreach->fr_next; | |
10775 | } | |
10776 | ||
9c2799c2 | 10777 | gas_assert (unreach->fr_type == rs_machine_dependent |
43cd72b9 BW |
10778 | && (unreach->fr_subtype == RELAX_MAYBE_UNREACHABLE |
10779 | || unreach->fr_subtype == RELAX_UNREACHABLE)); | |
10780 | ||
10781 | target_offset += unreach->tc_frag_data.text_expansion[0]; | |
10782 | } | |
9c2799c2 | 10783 | gas_assert (gen_label == NULL); |
e0001a05 | 10784 | gen_label = symbol_new (FAKE_LABEL_NAME, now_seg, |
43cd72b9 BW |
10785 | fr_opcode - fragP->fr_literal |
10786 | + target_offset, fragP); | |
e0001a05 NC |
10787 | break; |
10788 | ||
10789 | case ITYPE_INSN: | |
def13efb | 10790 | if (first && from_wide_insn) |
43cd72b9 BW |
10791 | { |
10792 | target_offset += xtensa_format_length (isa, fmt); | |
10793 | first = FALSE; | |
10794 | if (!opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
10795 | target_offset += xg_get_single_size (tinsn->opcode); | |
10796 | } | |
10797 | else | |
10798 | target_offset += xg_get_single_size (tinsn->opcode); | |
e0001a05 NC |
10799 | break; |
10800 | } | |
10801 | } | |
10802 | ||
10803 | total_size = 0; | |
43cd72b9 | 10804 | first = TRUE; |
e0001a05 NC |
10805 | for (i = 0; i < istack.ninsn; i++) |
10806 | { | |
43cd72b9 | 10807 | TInsn *tinsn = &istack.insn[i]; |
e0001a05 NC |
10808 | fragS *lit_frag; |
10809 | int size; | |
10810 | segT target_seg; | |
43cd72b9 | 10811 | bfd_reloc_code_real_type reloc_type; |
e0001a05 | 10812 | |
43cd72b9 | 10813 | switch (tinsn->insn_type) |
e0001a05 NC |
10814 | { |
10815 | case ITYPE_LITERAL: | |
43cd72b9 BW |
10816 | lit_frag = fragP->tc_frag_data.literal_frags[slot]; |
10817 | /* Already checked. */ | |
9c2799c2 NC |
10818 | gas_assert (lit_frag != NULL); |
10819 | gas_assert (lit_sym != NULL); | |
10820 | gas_assert (tinsn->ntok == 1); | |
43cd72b9 | 10821 | /* Add a fixup. */ |
e0001a05 | 10822 | target_seg = S_GET_SEGMENT (lit_sym); |
9c2799c2 | 10823 | gas_assert (target_seg); |
28dbbc02 | 10824 | reloc_type = map_operator_to_reloc (tinsn->tok[0].X_op, TRUE); |
e0001a05 | 10825 | fix_new_exp_in_seg (target_seg, 0, lit_frag, 0, 4, |
43cd72b9 | 10826 | &tinsn->tok[0], FALSE, reloc_type); |
e0001a05 NC |
10827 | break; |
10828 | ||
10829 | case ITYPE_LABEL: | |
10830 | break; | |
10831 | ||
10832 | case ITYPE_INSN: | |
43cd72b9 BW |
10833 | xg_resolve_labels (tinsn, gen_label); |
10834 | xg_resolve_literals (tinsn, lit_sym); | |
def13efb | 10835 | if (from_wide_insn && first) |
43cd72b9 BW |
10836 | { |
10837 | first = FALSE; | |
10838 | if (opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
10839 | { | |
b5e4a23d | 10840 | cur_vinsn.slots[slot] = *tinsn; |
43cd72b9 BW |
10841 | } |
10842 | else | |
10843 | { | |
b5e4a23d | 10844 | cur_vinsn.slots[slot].opcode = |
43cd72b9 | 10845 | xtensa_format_slot_nop_opcode (isa, fmt, slot); |
b5e4a23d | 10846 | cur_vinsn.slots[slot].ntok = 0; |
43cd72b9 | 10847 | } |
b5e4a23d BW |
10848 | vinsn_to_insnbuf (&cur_vinsn, immed_instr, fragP, TRUE); |
10849 | xtensa_insnbuf_to_chars (isa, cur_vinsn.insnbuf, | |
d77b99c9 | 10850 | (unsigned char *) immed_instr, 0); |
43cd72b9 BW |
10851 | fragP->tc_frag_data.is_insn = TRUE; |
10852 | size = xtensa_format_length (isa, fmt); | |
10853 | if (!opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
10854 | { | |
43cd72b9 | 10855 | xg_emit_insn_to_buf |
b2d179be | 10856 | (tinsn, immed_instr + size, fragP, |
43cd72b9 BW |
10857 | immed_instr - fragP->fr_literal + size, TRUE); |
10858 | size += xg_get_single_size (tinsn->opcode); | |
10859 | } | |
10860 | } | |
10861 | else | |
10862 | { | |
43cd72b9 | 10863 | size = xg_get_single_size (tinsn->opcode); |
b2d179be | 10864 | xg_emit_insn_to_buf (tinsn, immed_instr, fragP, |
43cd72b9 | 10865 | immed_instr - fragP->fr_literal, TRUE); |
43cd72b9 | 10866 | } |
e0001a05 | 10867 | immed_instr += size; |
43cd72b9 | 10868 | total_size += size; |
e0001a05 NC |
10869 | break; |
10870 | } | |
10871 | } | |
10872 | ||
10873 | diff = total_size - old_size; | |
9c2799c2 | 10874 | gas_assert (diff >= 0); |
e0001a05 NC |
10875 | if (diff != 0) |
10876 | expanded = TRUE; | |
9c2799c2 | 10877 | gas_assert (diff <= fragP->fr_var); |
e0001a05 NC |
10878 | fragP->fr_var -= diff; |
10879 | fragP->fr_fix += diff; | |
10880 | } | |
10881 | ||
e0001a05 | 10882 | /* Check for undefined immediates in LOOP instructions. */ |
43cd72b9 | 10883 | if (is_loop) |
e0001a05 NC |
10884 | { |
10885 | symbolS *sym; | |
43cd72b9 | 10886 | sym = orig_tinsn.tok[1].X_add_symbol; |
e0001a05 NC |
10887 | if (sym != NULL && !S_IS_DEFINED (sym)) |
10888 | { | |
10889 | as_bad (_("unresolved loop target symbol: %s"), S_GET_NAME (sym)); | |
10890 | return; | |
10891 | } | |
43cd72b9 | 10892 | sym = orig_tinsn.tok[1].X_op_symbol; |
e0001a05 NC |
10893 | if (sym != NULL && !S_IS_DEFINED (sym)) |
10894 | { | |
10895 | as_bad (_("unresolved loop target symbol: %s"), S_GET_NAME (sym)); | |
10896 | return; | |
10897 | } | |
10898 | } | |
10899 | ||
43cd72b9 | 10900 | if (expanded && is_direct_call_opcode (orig_tinsn.opcode)) |
e0001a05 NC |
10901 | { |
10902 | /* Add an expansion note on the expanded instruction. */ | |
10903 | fix_new_exp_in_seg (now_seg, 0, fragP, fr_opcode - fragP->fr_literal, 4, | |
43cd72b9 | 10904 | &orig_tinsn.tok[0], TRUE, |
e0001a05 | 10905 | BFD_RELOC_XTENSA_ASM_EXPAND); |
e0001a05 NC |
10906 | } |
10907 | } | |
10908 | ||
10909 | ||
10910 | /* Add a new fix expression into the desired segment. We have to | |
10911 | switch to that segment to do this. */ | |
10912 | ||
10913 | static fixS * | |
7fa3d080 BW |
10914 | fix_new_exp_in_seg (segT new_seg, |
10915 | subsegT new_subseg, | |
10916 | fragS *frag, | |
10917 | int where, | |
10918 | int size, | |
10919 | expressionS *exp, | |
10920 | int pcrel, | |
10921 | bfd_reloc_code_real_type r_type) | |
e0001a05 NC |
10922 | { |
10923 | fixS *new_fix; | |
10924 | segT seg = now_seg; | |
10925 | subsegT subseg = now_subseg; | |
43cd72b9 | 10926 | |
9c2799c2 | 10927 | gas_assert (new_seg != 0); |
e0001a05 NC |
10928 | subseg_set (new_seg, new_subseg); |
10929 | ||
e0001a05 NC |
10930 | new_fix = fix_new_exp (frag, where, size, exp, pcrel, r_type); |
10931 | subseg_set (seg, subseg); | |
10932 | return new_fix; | |
10933 | } | |
10934 | ||
10935 | ||
b08b5071 BW |
10936 | \f |
10937 | /* A map that keeps information on a per-subsegment basis. This is | |
10938 | maintained during initial assembly, but is invalid once the | |
10939 | subsegments are smashed together. I.E., it cannot be used during | |
10940 | the relaxation. */ | |
e0001a05 | 10941 | |
b08b5071 | 10942 | typedef struct subseg_map_struct |
e0001a05 | 10943 | { |
b08b5071 BW |
10944 | /* the key */ |
10945 | segT seg; | |
10946 | subsegT subseg; | |
e0001a05 | 10947 | |
b08b5071 BW |
10948 | /* the data */ |
10949 | unsigned flags; | |
10950 | float total_freq; /* fall-through + branch target frequency */ | |
10951 | float target_freq; /* branch target frequency alone */ | |
10952 | ||
10953 | struct subseg_map_struct *next; | |
10954 | } subseg_map; | |
e0001a05 | 10955 | |
e0001a05 | 10956 | |
e0001a05 NC |
10957 | static subseg_map *sseg_map = NULL; |
10958 | ||
43cd72b9 | 10959 | static subseg_map * |
7fa3d080 | 10960 | get_subseg_info (segT seg, subsegT subseg) |
e0001a05 NC |
10961 | { |
10962 | subseg_map *subseg_e; | |
10963 | ||
10964 | for (subseg_e = sseg_map; subseg_e; subseg_e = subseg_e->next) | |
e0001a05 | 10965 | { |
43cd72b9 | 10966 | if (seg == subseg_e->seg && subseg == subseg_e->subseg) |
b08b5071 | 10967 | break; |
e0001a05 | 10968 | } |
b08b5071 BW |
10969 | return subseg_e; |
10970 | } | |
10971 | ||
10972 | ||
10973 | static subseg_map * | |
10974 | add_subseg_info (segT seg, subsegT subseg) | |
10975 | { | |
325801bd | 10976 | subseg_map *subseg_e = XNEW (subseg_map); |
43cd72b9 BW |
10977 | memset (subseg_e, 0, sizeof (subseg_map)); |
10978 | subseg_e->seg = seg; | |
10979 | subseg_e->subseg = subseg; | |
10980 | subseg_e->flags = 0; | |
10981 | /* Start off considering every branch target very important. */ | |
b08b5071 BW |
10982 | subseg_e->target_freq = 1.0; |
10983 | subseg_e->total_freq = 1.0; | |
43cd72b9 BW |
10984 | subseg_e->next = sseg_map; |
10985 | sseg_map = subseg_e; | |
43cd72b9 BW |
10986 | return subseg_e; |
10987 | } | |
e0001a05 | 10988 | |
7fa3d080 BW |
10989 | |
10990 | static unsigned | |
10991 | get_last_insn_flags (segT seg, subsegT subseg) | |
10992 | { | |
10993 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
b08b5071 BW |
10994 | if (subseg_e) |
10995 | return subseg_e->flags; | |
10996 | return 0; | |
7fa3d080 BW |
10997 | } |
10998 | ||
10999 | ||
43cd72b9 | 11000 | static void |
7fa3d080 BW |
11001 | set_last_insn_flags (segT seg, |
11002 | subsegT subseg, | |
11003 | unsigned fl, | |
11004 | bfd_boolean val) | |
43cd72b9 BW |
11005 | { |
11006 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
b08b5071 BW |
11007 | if (! subseg_e) |
11008 | subseg_e = add_subseg_info (seg, subseg); | |
e0001a05 NC |
11009 | if (val) |
11010 | subseg_e->flags |= fl; | |
11011 | else | |
11012 | subseg_e->flags &= ~fl; | |
11013 | } | |
11014 | ||
b08b5071 BW |
11015 | |
11016 | static float | |
11017 | get_subseg_total_freq (segT seg, subsegT subseg) | |
11018 | { | |
11019 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
11020 | if (subseg_e) | |
11021 | return subseg_e->total_freq; | |
11022 | return 1.0; | |
11023 | } | |
11024 | ||
11025 | ||
11026 | static float | |
11027 | get_subseg_target_freq (segT seg, subsegT subseg) | |
11028 | { | |
11029 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
11030 | if (subseg_e) | |
11031 | return subseg_e->target_freq; | |
11032 | return 1.0; | |
11033 | } | |
11034 | ||
11035 | ||
11036 | static void | |
11037 | set_subseg_freq (segT seg, subsegT subseg, float total_f, float target_f) | |
11038 | { | |
11039 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
11040 | if (! subseg_e) | |
11041 | subseg_e = add_subseg_info (seg, subseg); | |
11042 | subseg_e->total_freq = total_f; | |
11043 | subseg_e->target_freq = target_f; | |
11044 | } | |
11045 | ||
e0001a05 NC |
11046 | \f |
11047 | /* Segment Lists and emit_state Stuff. */ | |
11048 | ||
e0001a05 | 11049 | static void |
7fa3d080 | 11050 | xtensa_move_seg_list_to_beginning (seg_list *head) |
e0001a05 NC |
11051 | { |
11052 | head = head->next; | |
11053 | while (head) | |
11054 | { | |
11055 | segT literal_section = head->seg; | |
11056 | ||
11057 | /* Move the literal section to the front of the section list. */ | |
9c2799c2 | 11058 | gas_assert (literal_section); |
69852798 AM |
11059 | if (literal_section != stdoutput->sections) |
11060 | { | |
11061 | bfd_section_list_remove (stdoutput, literal_section); | |
11062 | bfd_section_list_prepend (stdoutput, literal_section); | |
11063 | } | |
e0001a05 NC |
11064 | head = head->next; |
11065 | } | |
11066 | } | |
11067 | ||
11068 | ||
7fa3d080 BW |
11069 | static void mark_literal_frags (seg_list *); |
11070 | ||
947fa914 MF |
11071 | static void |
11072 | xg_promote_candidate_litpool (struct litpool_seg *lps, | |
11073 | struct litpool_frag *lp) | |
11074 | { | |
11075 | fragS *poolbeg; | |
11076 | fragS *poolend; | |
11077 | symbolS *lsym; | |
11078 | char label[10 + 2 * sizeof (fragS *)]; | |
11079 | ||
11080 | poolbeg = lp->fragP; | |
11081 | lp->priority = 1; | |
11082 | poolbeg->fr_subtype = RELAX_LITERAL_POOL_BEGIN; | |
11083 | poolend = poolbeg->fr_next; | |
11084 | gas_assert (poolend->fr_type == rs_machine_dependent && | |
11085 | poolend->fr_subtype == RELAX_LITERAL_POOL_END); | |
11086 | /* Create a local symbol pointing to the | |
11087 | end of the pool. */ | |
11088 | sprintf (label, ".L0_LT_%p", poolbeg); | |
11089 | lsym = (symbolS *)local_symbol_make (label, lps->seg, | |
11090 | 0, poolend); | |
11091 | poolbeg->fr_symbol = lsym; | |
11092 | /* Rest is done in xtensa_relax_frag. */ | |
11093 | } | |
11094 | ||
cd665a94 MF |
11095 | static struct litpool_frag *xg_find_litpool (struct litpool_seg *lps, |
11096 | struct litpool_frag *lpf, | |
11097 | addressT addr) | |
11098 | { | |
11099 | struct litpool_frag *lp = lpf->prev; | |
11100 | ||
11101 | gas_assert (lp->fragP); | |
11102 | ||
11103 | while (lp->fragP->fr_subtype == RELAX_LITERAL_POOL_CANDIDATE_BEGIN) | |
11104 | { | |
11105 | lp = lp->prev; | |
11106 | if (lp->fragP == NULL) | |
11107 | { | |
11108 | /* End of list; have to bite the bullet. | |
11109 | Take the nearest. */ | |
11110 | lp = lpf->prev; | |
11111 | break; | |
11112 | } | |
11113 | /* Does it (conservatively) reach? */ | |
11114 | if (addr - lp->addr <= 128 * 1024) | |
11115 | { | |
11116 | if (lp->fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN && | |
11117 | lp->literal_count < MAX_POOL_LITERALS) | |
11118 | { | |
11119 | /* Found a good one. */ | |
11120 | break; | |
11121 | } | |
11122 | else if (lp->prev->fragP && | |
11123 | addr - lp->prev->addr > 128 * 1024 && | |
11124 | lp->prev->literal_count < MAX_POOL_LITERALS) | |
11125 | { | |
11126 | /* This is still a "candidate" but the next one | |
11127 | will be too far away, so revert to the nearest | |
11128 | one, convert it and add the jump around. */ | |
11129 | lp = lpf->prev; | |
11130 | break; | |
11131 | } | |
11132 | } | |
11133 | } | |
11134 | ||
11135 | if (lp->literal_count >= MAX_POOL_LITERALS) | |
11136 | { | |
11137 | lp = lpf->prev; | |
11138 | while (lp && lp->fragP && lp->literal_count >= MAX_POOL_LITERALS) | |
11139 | { | |
11140 | lp = lp->prev; | |
11141 | } | |
11142 | gas_assert (lp); | |
11143 | } | |
11144 | ||
11145 | gas_assert (lp && lp->fragP && lp->literal_count < MAX_POOL_LITERALS); | |
11146 | ++lp->literal_count; | |
11147 | ||
11148 | /* Convert candidate and add the jump around. */ | |
11149 | if (lp->fragP->fr_subtype == RELAX_LITERAL_POOL_CANDIDATE_BEGIN) | |
11150 | xg_promote_candidate_litpool (lps, lp); | |
11151 | ||
11152 | return lp; | |
11153 | } | |
11154 | ||
d0ad159d MF |
11155 | static bfd_boolean xtensa_is_init_fini (segT seg) |
11156 | { | |
11157 | if (!seg) | |
11158 | return 0; | |
11159 | return strcmp (segment_name (seg), INIT_SECTION_NAME) == 0 | |
11160 | || strcmp (segment_name (seg), FINI_SECTION_NAME) == 0; | |
11161 | } | |
11162 | ||
7fa3d080 | 11163 | static void |
f8aecf3c | 11164 | xtensa_assign_litpool_addresses (void) |
e0001a05 | 11165 | { |
b46824bd | 11166 | struct litpool_seg *lps; |
b46824bd MF |
11167 | |
11168 | for (lps = litpool_seg_list.next; lps; lps = lps->next) | |
11169 | { | |
11170 | frchainS *frchP = seg_info (lps->seg)->frchainP; | |
11171 | struct litpool_frag *lpf = lps->frag_list.next; | |
11172 | addressT addr = 0; | |
11173 | ||
d0ad159d MF |
11174 | if (xtensa_is_init_fini (lps->seg)) |
11175 | continue; | |
11176 | ||
b46824bd MF |
11177 | for ( ; frchP; frchP = frchP->frch_next) |
11178 | { | |
11179 | fragS *fragP; | |
11180 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
11181 | { | |
11182 | if (lpf && fragP == lpf->fragP) | |
11183 | { | |
11184 | gas_assert(fragP->fr_type == rs_machine_dependent && | |
11185 | (fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN || | |
11186 | fragP->fr_subtype == RELAX_LITERAL_POOL_CANDIDATE_BEGIN)); | |
11187 | /* Found a litpool location. */ | |
11188 | lpf->addr = addr; | |
11189 | lpf = lpf->next; | |
11190 | } | |
11191 | if (fragP->fr_type == rs_machine_dependent && | |
11192 | fragP->fr_subtype == RELAX_SLOTS) | |
11193 | { | |
11194 | int slot; | |
11195 | for (slot = 0; slot < MAX_SLOTS; slot++) | |
11196 | { | |
d0ad159d MF |
11197 | fragS *litfrag = fragP->tc_frag_data.literal_frags[slot]; |
11198 | ||
11199 | if (litfrag | |
11200 | && litfrag->tc_frag_data.is_literal | |
11201 | && !litfrag->tc_frag_data.literal_frag) | |
b46824bd | 11202 | { |
d0ad159d MF |
11203 | /* L32R referring .literal or generated as a result |
11204 | of relaxation. Point its literal to the nearest | |
11205 | litpool preferring non-"candidate" positions to | |
11206 | avoid the jump-around. */ | |
11207 | ||
11208 | struct litpool_frag *lp; | |
11209 | ||
11210 | lp = xg_find_litpool (lps, lpf, addr); | |
11211 | /* Take earliest use of this literal to avoid | |
11212 | forward refs. */ | |
11213 | litfrag->tc_frag_data.literal_frag = lp->fragP; | |
b46824bd MF |
11214 | } |
11215 | } | |
11216 | } | |
11217 | addr += fragP->fr_fix; | |
11218 | if (fragP->fr_type == rs_fill) | |
11219 | addr += fragP->fr_offset; | |
11220 | } | |
11221 | } | |
11222 | } | |
f8aecf3c | 11223 | } |
b46824bd | 11224 | |
f8aecf3c MF |
11225 | static void |
11226 | xtensa_move_literals (void) | |
11227 | { | |
11228 | seg_list *segment; | |
11229 | frchainS *frchain_from, *frchain_to; | |
11230 | fragS *search_frag, *next_frag, *literal_pool, *insert_after; | |
11231 | fragS **frag_splice; | |
11232 | emit_state state; | |
11233 | segT dest_seg; | |
11234 | fixS *fix, *next_fix, **fix_splice; | |
11235 | sym_list *lit; | |
11236 | const char *init_name = INIT_SECTION_NAME; | |
11237 | const char *fini_name = FINI_SECTION_NAME; | |
11238 | int init_name_len = strlen(init_name); | |
11239 | int fini_name_len = strlen(fini_name); | |
11240 | ||
11241 | mark_literal_frags (literal_head->next); | |
11242 | ||
11243 | if (use_literal_section) | |
11244 | return; | |
11245 | ||
11246 | /* Assign addresses (rough estimates) to the potential literal pool locations | |
11247 | and create new ones if the gaps are too large. */ | |
11248 | ||
11249 | xtensa_assign_litpool_addresses (); | |
11250 | ||
11251 | /* Walk through the literal segments. */ | |
74869ac7 | 11252 | for (segment = literal_head->next; segment; segment = segment->next) |
e0001a05 | 11253 | { |
4111950f MF |
11254 | const char *seg_name = segment_name (segment->seg); |
11255 | ||
74869ac7 | 11256 | /* Keep the literals for .init and .fini in separate sections. */ |
4111950f MF |
11257 | if ((!memcmp (seg_name, init_name, init_name_len) && |
11258 | !strcmp (seg_name + init_name_len, ".literal")) || | |
11259 | (!memcmp (seg_name, fini_name, fini_name_len) && | |
11260 | !strcmp (seg_name + fini_name_len, ".literal"))) | |
74869ac7 BW |
11261 | continue; |
11262 | ||
e0001a05 NC |
11263 | frchain_from = seg_info (segment->seg)->frchainP; |
11264 | search_frag = frchain_from->frch_root; | |
11265 | literal_pool = NULL; | |
11266 | frchain_to = NULL; | |
11267 | frag_splice = &(frchain_from->frch_root); | |
11268 | ||
4de0562a | 11269 | while (search_frag && !search_frag->tc_frag_data.literal_frag) |
e0001a05 | 11270 | { |
9c2799c2 | 11271 | gas_assert (search_frag->fr_fix == 0 |
e0001a05 NC |
11272 | || search_frag->fr_type == rs_align); |
11273 | search_frag = search_frag->fr_next; | |
11274 | } | |
11275 | ||
4de0562a | 11276 | if (!search_frag) |
f8aecf3c | 11277 | continue; |
4de0562a | 11278 | |
9c2799c2 | 11279 | gas_assert (search_frag->tc_frag_data.literal_frag->fr_subtype |
e0001a05 NC |
11280 | == RELAX_LITERAL_POOL_BEGIN); |
11281 | xtensa_switch_section_emit_state (&state, segment->seg, 0); | |
11282 | ||
11283 | /* Make sure that all the frags in this series are closed, and | |
11284 | that there is at least one left over of zero-size. This | |
11285 | prevents us from making a segment with an frchain without any | |
11286 | frags in it. */ | |
11287 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 11288 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 11289 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); |
43cd72b9 | 11290 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 11291 | |
43cd72b9 | 11292 | while (search_frag != frag_now) |
e0001a05 NC |
11293 | { |
11294 | next_frag = search_frag->fr_next; | |
e0001a05 NC |
11295 | if (search_frag->tc_frag_data.literal_frag) |
11296 | { | |
11297 | literal_pool = search_frag->tc_frag_data.literal_frag; | |
9c2799c2 | 11298 | gas_assert (literal_pool->fr_subtype == RELAX_LITERAL_POOL_BEGIN); |
dd49a749 | 11299 | frchain_to = literal_pool->tc_frag_data.lit_frchain; |
9c2799c2 | 11300 | gas_assert (frchain_to); |
e0001a05 | 11301 | } |
b46824bd MF |
11302 | |
11303 | if (search_frag->fr_type == rs_fill && search_frag->fr_fix == 0) | |
11304 | { | |
11305 | /* Skip empty fill frags. */ | |
11306 | *frag_splice = next_frag; | |
11307 | search_frag = next_frag; | |
11308 | continue; | |
11309 | } | |
11310 | ||
11311 | if (search_frag->fr_type == rs_align) | |
11312 | { | |
11313 | /* Skip alignment frags, because the pool as a whole will be | |
11314 | aligned if used, and we don't want to force alignment if the | |
11315 | pool is unused. */ | |
11316 | *frag_splice = next_frag; | |
11317 | search_frag = next_frag; | |
11318 | continue; | |
11319 | } | |
11320 | ||
11321 | /* First, move the frag out of the literal section and | |
11322 | to the appropriate place. */ | |
11323 | ||
33eaf5de | 11324 | /* Insert an alignment frag at start of pool. */ |
b46824bd MF |
11325 | if (literal_pool->fr_next->fr_type == rs_machine_dependent && |
11326 | literal_pool->fr_next->fr_subtype == RELAX_LITERAL_POOL_END) | |
11327 | { | |
11328 | segT pool_seg = literal_pool->fr_next->tc_frag_data.lit_seg; | |
11329 | emit_state prev_state; | |
11330 | fragS *prev_frag; | |
11331 | fragS *align_frag; | |
11332 | xtensa_switch_section_emit_state (&prev_state, pool_seg, 0); | |
11333 | prev_frag = frag_now; | |
11334 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
11335 | align_frag = frag_now; | |
11336 | frag_align (2, 0, 0); | |
11337 | /* Splice it into the right place. */ | |
11338 | prev_frag->fr_next = align_frag->fr_next; | |
11339 | align_frag->fr_next = literal_pool->fr_next; | |
11340 | literal_pool->fr_next = align_frag; | |
11341 | /* Insert after this one. */ | |
11342 | literal_pool->tc_frag_data.literal_frag = align_frag; | |
11343 | xtensa_restore_emit_state (&prev_state); | |
11344 | } | |
c48aaca0 | 11345 | insert_after = literal_pool->tc_frag_data.literal_frag; |
dd49a749 | 11346 | dest_seg = insert_after->fr_next->tc_frag_data.lit_seg; |
b46824bd MF |
11347 | /* Skip align frag. */ |
11348 | if (insert_after->fr_next->fr_type == rs_align) | |
11349 | { | |
11350 | insert_after = insert_after->fr_next; | |
11351 | } | |
43cd72b9 | 11352 | |
e0001a05 NC |
11353 | *frag_splice = next_frag; |
11354 | search_frag->fr_next = insert_after->fr_next; | |
11355 | insert_after->fr_next = search_frag; | |
11356 | search_frag->tc_frag_data.lit_seg = dest_seg; | |
c48aaca0 | 11357 | literal_pool->tc_frag_data.literal_frag = search_frag; |
e0001a05 NC |
11358 | |
11359 | /* Now move any fixups associated with this frag to the | |
11360 | right section. */ | |
11361 | fix = frchain_from->fix_root; | |
11362 | fix_splice = &(frchain_from->fix_root); | |
11363 | while (fix) | |
11364 | { | |
11365 | next_fix = fix->fx_next; | |
11366 | if (fix->fx_frag == search_frag) | |
11367 | { | |
11368 | *fix_splice = next_fix; | |
11369 | fix->fx_next = frchain_to->fix_root; | |
11370 | frchain_to->fix_root = fix; | |
11371 | if (frchain_to->fix_tail == NULL) | |
11372 | frchain_to->fix_tail = fix; | |
11373 | } | |
11374 | else | |
11375 | fix_splice = &(fix->fx_next); | |
11376 | fix = next_fix; | |
11377 | } | |
11378 | search_frag = next_frag; | |
11379 | } | |
11380 | ||
11381 | if (frchain_from->fix_root != NULL) | |
11382 | { | |
11383 | frchain_from = seg_info (segment->seg)->frchainP; | |
11384 | as_warn (_("fixes not all moved from %s"), segment->seg->name); | |
11385 | ||
9c2799c2 | 11386 | gas_assert (frchain_from->fix_root == NULL); |
e0001a05 NC |
11387 | } |
11388 | frchain_from->fix_tail = NULL; | |
11389 | xtensa_restore_emit_state (&state); | |
e0001a05 NC |
11390 | } |
11391 | ||
82e7541d BW |
11392 | /* Now fix up the SEGMENT value for all the literal symbols. */ |
11393 | for (lit = literal_syms; lit; lit = lit->next) | |
11394 | { | |
11395 | symbolS *lit_sym = lit->sym; | |
91d6fa6a NC |
11396 | segT dseg = symbol_get_frag (lit_sym)->tc_frag_data.lit_seg; |
11397 | if (dseg) | |
11398 | S_SET_SEGMENT (lit_sym, dseg); | |
82e7541d | 11399 | } |
e0001a05 NC |
11400 | } |
11401 | ||
11402 | ||
a7877748 BW |
11403 | /* Walk over all the frags for segments in a list and mark them as |
11404 | containing literals. As clunky as this is, we can't rely on frag_var | |
11405 | and frag_variant to get called in all situations. */ | |
11406 | ||
11407 | static void | |
7fa3d080 | 11408 | mark_literal_frags (seg_list *segment) |
a7877748 BW |
11409 | { |
11410 | frchainS *frchain_from; | |
11411 | fragS *search_frag; | |
11412 | ||
11413 | while (segment) | |
11414 | { | |
11415 | frchain_from = seg_info (segment->seg)->frchainP; | |
11416 | search_frag = frchain_from->frch_root; | |
c138bc38 | 11417 | while (search_frag) |
a7877748 BW |
11418 | { |
11419 | search_frag->tc_frag_data.is_literal = TRUE; | |
11420 | search_frag = search_frag->fr_next; | |
11421 | } | |
11422 | segment = segment->next; | |
11423 | } | |
11424 | } | |
11425 | ||
11426 | ||
e0001a05 | 11427 | static void |
7fa3d080 | 11428 | xtensa_reorder_seg_list (seg_list *head, segT after) |
e0001a05 NC |
11429 | { |
11430 | /* Move all of the sections in the section list to come | |
11431 | after "after" in the gnu segment list. */ | |
11432 | ||
11433 | head = head->next; | |
11434 | while (head) | |
11435 | { | |
11436 | segT literal_section = head->seg; | |
11437 | ||
11438 | /* Move the literal section after "after". */ | |
9c2799c2 | 11439 | gas_assert (literal_section); |
e0001a05 NC |
11440 | if (literal_section != after) |
11441 | { | |
69852798 AM |
11442 | bfd_section_list_remove (stdoutput, literal_section); |
11443 | bfd_section_list_insert_after (stdoutput, after, literal_section); | |
e0001a05 NC |
11444 | } |
11445 | ||
11446 | head = head->next; | |
11447 | } | |
11448 | } | |
11449 | ||
11450 | ||
11451 | /* Push all the literal segments to the end of the gnu list. */ | |
11452 | ||
7fa3d080 BW |
11453 | static void |
11454 | xtensa_reorder_segments (void) | |
e0001a05 NC |
11455 | { |
11456 | segT sec; | |
b08b5071 | 11457 | segT last_sec = 0; |
e0001a05 NC |
11458 | int old_count = 0; |
11459 | int new_count = 0; | |
11460 | ||
11461 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) | |
b08b5071 BW |
11462 | { |
11463 | last_sec = sec; | |
11464 | old_count++; | |
11465 | } | |
e0001a05 NC |
11466 | |
11467 | /* Now that we have the last section, push all the literal | |
11468 | sections to the end. */ | |
e0001a05 | 11469 | xtensa_reorder_seg_list (literal_head, last_sec); |
e0001a05 NC |
11470 | |
11471 | /* Now perform the final error check. */ | |
11472 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) | |
11473 | new_count++; | |
9c2799c2 | 11474 | gas_assert (new_count == old_count); |
e0001a05 NC |
11475 | } |
11476 | ||
11477 | ||
e0001a05 NC |
11478 | /* Change the emit state (seg, subseg, and frag related stuff) to the |
11479 | correct location. Return a emit_state which can be passed to | |
11480 | xtensa_restore_emit_state to return to current fragment. */ | |
11481 | ||
7fa3d080 BW |
11482 | static void |
11483 | xtensa_switch_to_literal_fragment (emit_state *result) | |
43cd72b9 BW |
11484 | { |
11485 | if (directive_state[directive_absolute_literals]) | |
11486 | { | |
74869ac7 BW |
11487 | segT lit4_seg = cache_literal_section (TRUE); |
11488 | xtensa_switch_section_emit_state (result, lit4_seg, 0); | |
43cd72b9 BW |
11489 | } |
11490 | else | |
11491 | xtensa_switch_to_non_abs_literal_fragment (result); | |
11492 | ||
11493 | /* Do a 4-byte align here. */ | |
11494 | frag_align (2, 0, 0); | |
11495 | record_alignment (now_seg, 2); | |
11496 | } | |
11497 | ||
11498 | ||
7fa3d080 BW |
11499 | static void |
11500 | xtensa_switch_to_non_abs_literal_fragment (emit_state *result) | |
e0001a05 | 11501 | { |
e0001a05 | 11502 | fragS *pool_location = get_literal_pool_location (now_seg); |
74869ac7 | 11503 | segT lit_seg; |
d0ad159d | 11504 | bfd_boolean is_init_fini = xtensa_is_init_fini (now_seg); |
e0001a05 | 11505 | |
43cd72b9 BW |
11506 | if (pool_location == NULL |
11507 | && !use_literal_section | |
d0ad159d | 11508 | && !is_init_fini) |
e0001a05 | 11509 | { |
b46824bd MF |
11510 | if (!auto_litpools) |
11511 | { | |
11512 | as_bad (_("literal pool location required for text-section-literals; specify with .literal_position")); | |
11513 | } | |
947fa914 MF |
11514 | xtensa_maybe_create_literal_pool_frag (TRUE, TRUE); |
11515 | pool_location = get_literal_pool_location (now_seg); | |
e0001a05 NC |
11516 | } |
11517 | ||
74869ac7 BW |
11518 | lit_seg = cache_literal_section (FALSE); |
11519 | xtensa_switch_section_emit_state (result, lit_seg, 0); | |
e0001a05 | 11520 | |
43cd72b9 | 11521 | if (!use_literal_section |
d0ad159d | 11522 | && !is_init_fini |
43cd72b9 | 11523 | && get_literal_pool_location (now_seg) != pool_location) |
e0001a05 NC |
11524 | { |
11525 | /* Close whatever frag is there. */ | |
11526 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 11527 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
11528 | frag_now->tc_frag_data.literal_frag = pool_location; |
11529 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 11530 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 11531 | } |
e0001a05 NC |
11532 | } |
11533 | ||
11534 | ||
11535 | /* Call this function before emitting data into the literal section. | |
11536 | This is a helper function for xtensa_switch_to_literal_fragment. | |
11537 | This is similar to a .section new_now_seg subseg. */ | |
11538 | ||
7fa3d080 BW |
11539 | static void |
11540 | xtensa_switch_section_emit_state (emit_state *state, | |
11541 | segT new_now_seg, | |
11542 | subsegT new_now_subseg) | |
e0001a05 NC |
11543 | { |
11544 | state->name = now_seg->name; | |
11545 | state->now_seg = now_seg; | |
11546 | state->now_subseg = now_subseg; | |
11547 | state->generating_literals = generating_literals; | |
11548 | generating_literals++; | |
2b0210eb | 11549 | subseg_set (new_now_seg, new_now_subseg); |
e0001a05 NC |
11550 | } |
11551 | ||
11552 | ||
11553 | /* Use to restore the emitting into the normal place. */ | |
11554 | ||
7fa3d080 BW |
11555 | static void |
11556 | xtensa_restore_emit_state (emit_state *state) | |
e0001a05 NC |
11557 | { |
11558 | generating_literals = state->generating_literals; | |
2b0210eb | 11559 | subseg_set (state->now_seg, state->now_subseg); |
e0001a05 NC |
11560 | } |
11561 | ||
11562 | ||
74869ac7 | 11563 | /* Predicate function used to look up a section in a particular group. */ |
e0001a05 | 11564 | |
74869ac7 BW |
11565 | static bfd_boolean |
11566 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
e0001a05 | 11567 | { |
74869ac7 BW |
11568 | const char *gname = inf; |
11569 | const char *group_name = elf_group_name (sec); | |
3739860c | 11570 | |
74869ac7 BW |
11571 | return (group_name == gname |
11572 | || (group_name != NULL | |
11573 | && gname != NULL | |
11574 | && strcmp (group_name, gname) == 0)); | |
11575 | } | |
e0001a05 | 11576 | |
e0001a05 | 11577 | |
74869ac7 BW |
11578 | /* Get the literal section to be used for the current text section. |
11579 | The result may be cached in the default_lit_sections structure. */ | |
11580 | ||
11581 | static segT | |
11582 | cache_literal_section (bfd_boolean use_abs_literals) | |
11583 | { | |
11584 | const char *text_name, *group_name = 0; | |
b9bb4a93 TS |
11585 | const char *base_name, *suffix; |
11586 | char *name; | |
74869ac7 BW |
11587 | segT *pcached; |
11588 | segT seg, current_section; | |
11589 | int current_subsec; | |
11590 | bfd_boolean linkonce = FALSE; | |
11591 | ||
11592 | /* Save the current section/subsection. */ | |
11593 | current_section = now_seg; | |
11594 | current_subsec = now_subseg; | |
11595 | ||
11596 | /* Clear the cached values if they are no longer valid. */ | |
11597 | if (now_seg != default_lit_sections.current_text_seg) | |
b08b5071 | 11598 | { |
74869ac7 BW |
11599 | default_lit_sections.current_text_seg = now_seg; |
11600 | default_lit_sections.lit_seg = NULL; | |
11601 | default_lit_sections.lit4_seg = NULL; | |
11602 | } | |
11603 | ||
11604 | /* Check if the literal section is already cached. */ | |
11605 | if (use_abs_literals) | |
11606 | pcached = &default_lit_sections.lit4_seg; | |
11607 | else | |
11608 | pcached = &default_lit_sections.lit_seg; | |
11609 | ||
11610 | if (*pcached) | |
11611 | return *pcached; | |
3739860c | 11612 | |
74869ac7 BW |
11613 | text_name = default_lit_sections.lit_prefix; |
11614 | if (! text_name || ! *text_name) | |
11615 | { | |
11616 | text_name = segment_name (current_section); | |
11617 | group_name = elf_group_name (current_section); | |
11618 | linkonce = (current_section->flags & SEC_LINK_ONCE) != 0; | |
11619 | } | |
11620 | ||
11621 | base_name = use_abs_literals ? ".lit4" : ".literal"; | |
11622 | if (group_name) | |
11623 | { | |
4ec9d7d5 | 11624 | name = concat (base_name, ".", group_name, (char *) NULL); |
74869ac7 BW |
11625 | } |
11626 | else if (strncmp (text_name, ".gnu.linkonce.", linkonce_len) == 0) | |
11627 | { | |
11628 | suffix = strchr (text_name + linkonce_len, '.'); | |
11629 | ||
4ec9d7d5 TS |
11630 | name = concat (".gnu.linkonce", base_name, suffix ? suffix : "", |
11631 | (char *) NULL); | |
74869ac7 BW |
11632 | linkonce = TRUE; |
11633 | } | |
11634 | else | |
11635 | { | |
a89c407e SA |
11636 | /* If the section name begins or ends with ".text", then replace |
11637 | that portion instead of appending an additional suffix. */ | |
74869ac7 | 11638 | size_t len = strlen (text_name); |
a89c407e SA |
11639 | if (len >= 5 |
11640 | && (strcmp (text_name + len - 5, ".text") == 0 | |
11641 | || strncmp (text_name, ".text", 5) == 0)) | |
74869ac7 BW |
11642 | len -= 5; |
11643 | ||
add39d23 | 11644 | name = XNEWVEC (char, len + strlen (base_name) + 1); |
a89c407e SA |
11645 | if (strncmp (text_name, ".text", 5) == 0) |
11646 | { | |
11647 | strcpy (name, base_name); | |
11648 | strcat (name, text_name + 5); | |
11649 | } | |
11650 | else | |
11651 | { | |
11652 | strcpy (name, text_name); | |
11653 | strcpy (name + len, base_name); | |
11654 | } | |
b08b5071 | 11655 | } |
e0001a05 | 11656 | |
74869ac7 BW |
11657 | /* Canonicalize section names to allow renaming literal sections. |
11658 | The group name, if any, came from the current text section and | |
11659 | has already been canonicalized. */ | |
11660 | name = tc_canonicalize_symbol_name (name); | |
11661 | ||
11662 | seg = bfd_get_section_by_name_if (stdoutput, name, match_section_group, | |
11663 | (void *) group_name); | |
11664 | if (! seg) | |
e0001a05 | 11665 | { |
74869ac7 BW |
11666 | flagword flags; |
11667 | ||
11668 | seg = subseg_force_new (name, 0); | |
11669 | ||
11670 | if (! use_abs_literals) | |
b08b5071 | 11671 | { |
74869ac7 | 11672 | /* Add the newly created literal segment to the list. */ |
325801bd | 11673 | seg_list *n = XNEW (seg_list); |
b08b5071 | 11674 | n->seg = seg; |
74869ac7 BW |
11675 | n->next = literal_head->next; |
11676 | literal_head->next = n; | |
b08b5071 | 11677 | } |
74869ac7 BW |
11678 | |
11679 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_ALLOC | SEC_LOAD | |
11680 | | (linkonce ? (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD) : 0) | |
11681 | | (use_abs_literals ? SEC_DATA : SEC_CODE)); | |
11682 | ||
11683 | elf_group_name (seg) = group_name; | |
11684 | ||
fd361982 AM |
11685 | bfd_set_section_flags (seg, flags); |
11686 | bfd_set_section_alignment (seg, 2); | |
e0001a05 NC |
11687 | } |
11688 | ||
74869ac7 | 11689 | *pcached = seg; |
b08b5071 | 11690 | subseg_set (current_section, current_subsec); |
74869ac7 | 11691 | return seg; |
e0001a05 NC |
11692 | } |
11693 | ||
43cd72b9 BW |
11694 | \f |
11695 | /* Property Tables Stuff. */ | |
11696 | ||
7fa3d080 BW |
11697 | #define XTENSA_INSN_SEC_NAME ".xt.insn" |
11698 | #define XTENSA_LIT_SEC_NAME ".xt.lit" | |
11699 | #define XTENSA_PROP_SEC_NAME ".xt.prop" | |
11700 | ||
11701 | typedef bfd_boolean (*frag_predicate) (const fragS *); | |
11702 | typedef void (*frag_flags_fn) (const fragS *, frag_flags *); | |
11703 | ||
b08b5071 | 11704 | static bfd_boolean get_frag_is_literal (const fragS *); |
7fa3d080 BW |
11705 | static void xtensa_create_property_segments |
11706 | (frag_predicate, frag_predicate, const char *, xt_section_type); | |
11707 | static void xtensa_create_xproperty_segments | |
11708 | (frag_flags_fn, const char *, xt_section_type); | |
532f93bd | 11709 | static bfd_boolean exclude_section_from_property_tables (segT); |
7fa3d080 BW |
11710 | static bfd_boolean section_has_property (segT, frag_predicate); |
11711 | static bfd_boolean section_has_xproperty (segT, frag_flags_fn); | |
11712 | static void add_xt_block_frags | |
542f8b94 | 11713 | (segT, xtensa_block_info **, frag_predicate, frag_predicate); |
7fa3d080 BW |
11714 | static bfd_boolean xtensa_frag_flags_is_empty (const frag_flags *); |
11715 | static void xtensa_frag_flags_init (frag_flags *); | |
11716 | static void get_frag_property_flags (const fragS *, frag_flags *); | |
2f1bf5c1 | 11717 | static flagword frag_flags_to_number (const frag_flags *); |
542f8b94 | 11718 | static void add_xt_prop_frags (segT, xtensa_block_info **, frag_flags_fn); |
7fa3d080 BW |
11719 | |
11720 | /* Set up property tables after relaxation. */ | |
11721 | ||
11722 | void | |
11723 | xtensa_post_relax_hook (void) | |
11724 | { | |
11725 | xtensa_move_seg_list_to_beginning (literal_head); | |
7fa3d080 BW |
11726 | |
11727 | xtensa_find_unmarked_state_frags (); | |
99ded152 | 11728 | xtensa_mark_frags_for_org (); |
6a7eedfe | 11729 | xtensa_mark_difference_of_two_symbols (); |
7fa3d080 | 11730 | |
b29757dc BW |
11731 | xtensa_create_property_segments (get_frag_is_literal, |
11732 | NULL, | |
11733 | XTENSA_LIT_SEC_NAME, | |
11734 | xt_literal_sec); | |
7fa3d080 BW |
11735 | xtensa_create_xproperty_segments (get_frag_property_flags, |
11736 | XTENSA_PROP_SEC_NAME, | |
11737 | xt_prop_sec); | |
11738 | ||
11739 | if (warn_unaligned_branch_targets) | |
11740 | bfd_map_over_sections (stdoutput, xtensa_find_unaligned_branch_targets, 0); | |
11741 | bfd_map_over_sections (stdoutput, xtensa_find_unaligned_loops, 0); | |
11742 | } | |
11743 | ||
11744 | ||
43cd72b9 BW |
11745 | /* This function is only meaningful after xtensa_move_literals. */ |
11746 | ||
11747 | static bfd_boolean | |
7fa3d080 | 11748 | get_frag_is_literal (const fragS *fragP) |
43cd72b9 | 11749 | { |
9c2799c2 | 11750 | gas_assert (fragP != NULL); |
43cd72b9 BW |
11751 | return fragP->tc_frag_data.is_literal; |
11752 | } | |
11753 | ||
11754 | ||
43cd72b9 | 11755 | static void |
7fa3d080 BW |
11756 | xtensa_create_property_segments (frag_predicate property_function, |
11757 | frag_predicate end_property_function, | |
11758 | const char *section_name_base, | |
11759 | xt_section_type sec_type) | |
43cd72b9 BW |
11760 | { |
11761 | segT *seclist; | |
11762 | ||
11763 | /* Walk over all of the current segments. | |
11764 | Walk over each fragment | |
11765 | For each non-empty fragment, | |
11766 | Build a property record (append where possible). */ | |
11767 | ||
11768 | for (seclist = &stdoutput->sections; | |
11769 | seclist && *seclist; | |
11770 | seclist = &(*seclist)->next) | |
11771 | { | |
11772 | segT sec = *seclist; | |
43cd72b9 | 11773 | |
532f93bd | 11774 | if (exclude_section_from_property_tables (sec)) |
43cd72b9 BW |
11775 | continue; |
11776 | ||
11777 | if (section_has_property (sec, property_function)) | |
11778 | { | |
542f8b94 BW |
11779 | segment_info_type *xt_seg_info; |
11780 | xtensa_block_info **xt_blocks; | |
51c8ebc1 | 11781 | segT prop_sec = xtensa_make_property_section (sec, section_name_base); |
542f8b94 BW |
11782 | |
11783 | prop_sec->output_section = prop_sec; | |
11784 | subseg_set (prop_sec, 0); | |
11785 | xt_seg_info = seg_info (prop_sec); | |
11786 | xt_blocks = &xt_seg_info->tc_segment_info_data.blocks[sec_type]; | |
11787 | ||
43cd72b9 | 11788 | /* Walk over all of the frchains here and add new sections. */ |
542f8b94 | 11789 | add_xt_block_frags (sec, xt_blocks, property_function, |
43cd72b9 BW |
11790 | end_property_function); |
11791 | } | |
11792 | } | |
11793 | ||
11794 | /* Now we fill them out.... */ | |
11795 | ||
11796 | for (seclist = &stdoutput->sections; | |
11797 | seclist && *seclist; | |
11798 | seclist = &(*seclist)->next) | |
11799 | { | |
11800 | segment_info_type *seginfo; | |
11801 | xtensa_block_info *block; | |
11802 | segT sec = *seclist; | |
11803 | ||
11804 | seginfo = seg_info (sec); | |
11805 | block = seginfo->tc_segment_info_data.blocks[sec_type]; | |
11806 | ||
11807 | if (block) | |
11808 | { | |
11809 | xtensa_block_info *cur_block; | |
43cd72b9 | 11810 | int num_recs = 0; |
d77b99c9 | 11811 | bfd_size_type rec_size; |
43cd72b9 BW |
11812 | |
11813 | for (cur_block = block; cur_block; cur_block = cur_block->next) | |
11814 | num_recs++; | |
11815 | ||
11816 | rec_size = num_recs * 8; | |
fd361982 | 11817 | bfd_set_section_size (sec, rec_size); |
43cd72b9 | 11818 | |
43cd72b9 BW |
11819 | if (num_recs) |
11820 | { | |
43cd72b9 | 11821 | char *frag_data; |
542f8b94 | 11822 | int i; |
43cd72b9 | 11823 | |
542f8b94 BW |
11824 | subseg_set (sec, 0); |
11825 | frag_data = frag_more (rec_size); | |
43cd72b9 | 11826 | cur_block = block; |
43cd72b9 BW |
11827 | for (i = 0; i < num_recs; i++) |
11828 | { | |
542f8b94 | 11829 | fixS *fix; |
e0001a05 | 11830 | |
43cd72b9 | 11831 | /* Write the fixup. */ |
9c2799c2 | 11832 | gas_assert (cur_block); |
542f8b94 BW |
11833 | fix = fix_new (frag_now, i * 8, 4, |
11834 | section_symbol (cur_block->sec), | |
11835 | cur_block->offset, | |
11836 | FALSE, BFD_RELOC_32); | |
11837 | fix->fx_file = "<internal>"; | |
43cd72b9 | 11838 | fix->fx_line = 0; |
e0001a05 | 11839 | |
43cd72b9 | 11840 | /* Write the length. */ |
542f8b94 | 11841 | md_number_to_chars (&frag_data[4 + i * 8], |
43cd72b9 BW |
11842 | cur_block->size, 4); |
11843 | cur_block = cur_block->next; | |
11844 | } | |
542f8b94 BW |
11845 | frag_wane (frag_now); |
11846 | frag_new (0); | |
11847 | frag_wane (frag_now); | |
43cd72b9 BW |
11848 | } |
11849 | } | |
11850 | } | |
e0001a05 NC |
11851 | } |
11852 | ||
11853 | ||
7fa3d080 BW |
11854 | static void |
11855 | xtensa_create_xproperty_segments (frag_flags_fn flag_fn, | |
11856 | const char *section_name_base, | |
11857 | xt_section_type sec_type) | |
e0001a05 NC |
11858 | { |
11859 | segT *seclist; | |
11860 | ||
11861 | /* Walk over all of the current segments. | |
43cd72b9 BW |
11862 | Walk over each fragment. |
11863 | For each fragment that has instructions, | |
11864 | build an instruction record (append where possible). */ | |
e0001a05 NC |
11865 | |
11866 | for (seclist = &stdoutput->sections; | |
11867 | seclist && *seclist; | |
11868 | seclist = &(*seclist)->next) | |
11869 | { | |
11870 | segT sec = *seclist; | |
43cd72b9 | 11871 | |
532f93bd | 11872 | if (exclude_section_from_property_tables (sec)) |
43cd72b9 BW |
11873 | continue; |
11874 | ||
11875 | if (section_has_xproperty (sec, flag_fn)) | |
e0001a05 | 11876 | { |
542f8b94 BW |
11877 | segment_info_type *xt_seg_info; |
11878 | xtensa_block_info **xt_blocks; | |
51c8ebc1 | 11879 | segT prop_sec = xtensa_make_property_section (sec, section_name_base); |
542f8b94 BW |
11880 | |
11881 | prop_sec->output_section = prop_sec; | |
11882 | subseg_set (prop_sec, 0); | |
11883 | xt_seg_info = seg_info (prop_sec); | |
11884 | xt_blocks = &xt_seg_info->tc_segment_info_data.blocks[sec_type]; | |
11885 | ||
e0001a05 | 11886 | /* Walk over all of the frchains here and add new sections. */ |
542f8b94 | 11887 | add_xt_prop_frags (sec, xt_blocks, flag_fn); |
e0001a05 NC |
11888 | } |
11889 | } | |
11890 | ||
11891 | /* Now we fill them out.... */ | |
11892 | ||
11893 | for (seclist = &stdoutput->sections; | |
11894 | seclist && *seclist; | |
11895 | seclist = &(*seclist)->next) | |
11896 | { | |
11897 | segment_info_type *seginfo; | |
11898 | xtensa_block_info *block; | |
11899 | segT sec = *seclist; | |
43cd72b9 | 11900 | |
e0001a05 NC |
11901 | seginfo = seg_info (sec); |
11902 | block = seginfo->tc_segment_info_data.blocks[sec_type]; | |
11903 | ||
11904 | if (block) | |
11905 | { | |
11906 | xtensa_block_info *cur_block; | |
43cd72b9 | 11907 | int num_recs = 0; |
d77b99c9 | 11908 | bfd_size_type rec_size; |
e0001a05 NC |
11909 | |
11910 | for (cur_block = block; cur_block; cur_block = cur_block->next) | |
11911 | num_recs++; | |
11912 | ||
43cd72b9 | 11913 | rec_size = num_recs * (8 + 4); |
fd361982 | 11914 | bfd_set_section_size (sec, rec_size); |
43cd72b9 BW |
11915 | /* elf_section_data (sec)->this_hdr.sh_entsize = 12; */ |
11916 | ||
e0001a05 NC |
11917 | if (num_recs) |
11918 | { | |
e0001a05 | 11919 | char *frag_data; |
542f8b94 | 11920 | int i; |
e0001a05 | 11921 | |
542f8b94 BW |
11922 | subseg_set (sec, 0); |
11923 | frag_data = frag_more (rec_size); | |
e0001a05 | 11924 | cur_block = block; |
e0001a05 NC |
11925 | for (i = 0; i < num_recs; i++) |
11926 | { | |
542f8b94 | 11927 | fixS *fix; |
e0001a05 NC |
11928 | |
11929 | /* Write the fixup. */ | |
9c2799c2 | 11930 | gas_assert (cur_block); |
542f8b94 BW |
11931 | fix = fix_new (frag_now, i * 12, 4, |
11932 | section_symbol (cur_block->sec), | |
11933 | cur_block->offset, | |
11934 | FALSE, BFD_RELOC_32); | |
11935 | fix->fx_file = "<internal>"; | |
e0001a05 NC |
11936 | fix->fx_line = 0; |
11937 | ||
11938 | /* Write the length. */ | |
542f8b94 | 11939 | md_number_to_chars (&frag_data[4 + i * 12], |
e0001a05 | 11940 | cur_block->size, 4); |
542f8b94 | 11941 | md_number_to_chars (&frag_data[8 + i * 12], |
43cd72b9 | 11942 | frag_flags_to_number (&cur_block->flags), |
2f1bf5c1 | 11943 | sizeof (flagword)); |
e0001a05 NC |
11944 | cur_block = cur_block->next; |
11945 | } | |
542f8b94 BW |
11946 | frag_wane (frag_now); |
11947 | frag_new (0); | |
11948 | frag_wane (frag_now); | |
e0001a05 NC |
11949 | } |
11950 | } | |
11951 | } | |
11952 | } | |
11953 | ||
11954 | ||
532f93bd BW |
11955 | static bfd_boolean |
11956 | exclude_section_from_property_tables (segT sec) | |
11957 | { | |
fd361982 | 11958 | flagword flags = bfd_section_flags (sec); |
532f93bd BW |
11959 | |
11960 | /* Sections that don't contribute to the memory footprint are excluded. */ | |
11961 | if ((flags & SEC_DEBUGGING) | |
11962 | || !(flags & SEC_ALLOC) | |
11963 | || (flags & SEC_MERGE)) | |
11964 | return TRUE; | |
11965 | ||
11966 | /* Linker cie and fde optimizations mess up property entries for | |
11967 | eh_frame sections, but there is nothing inside them relevant to | |
11968 | property tables anyway. */ | |
11969 | if (strcmp (sec->name, ".eh_frame") == 0) | |
11970 | return TRUE; | |
11971 | ||
11972 | return FALSE; | |
11973 | } | |
11974 | ||
11975 | ||
7fa3d080 BW |
11976 | static bfd_boolean |
11977 | section_has_property (segT sec, frag_predicate property_function) | |
e0001a05 NC |
11978 | { |
11979 | segment_info_type *seginfo = seg_info (sec); | |
11980 | fragS *fragP; | |
11981 | ||
11982 | if (seginfo && seginfo->frchainP) | |
11983 | { | |
11984 | for (fragP = seginfo->frchainP->frch_root; fragP; fragP = fragP->fr_next) | |
11985 | { | |
11986 | if (property_function (fragP) | |
11987 | && (fragP->fr_type != rs_fill || fragP->fr_fix != 0)) | |
11988 | return TRUE; | |
11989 | } | |
11990 | } | |
11991 | return FALSE; | |
11992 | } | |
11993 | ||
11994 | ||
7fa3d080 BW |
11995 | static bfd_boolean |
11996 | section_has_xproperty (segT sec, frag_flags_fn property_function) | |
43cd72b9 BW |
11997 | { |
11998 | segment_info_type *seginfo = seg_info (sec); | |
11999 | fragS *fragP; | |
12000 | ||
12001 | if (seginfo && seginfo->frchainP) | |
12002 | { | |
12003 | for (fragP = seginfo->frchainP->frch_root; fragP; fragP = fragP->fr_next) | |
12004 | { | |
12005 | frag_flags prop_flags; | |
12006 | property_function (fragP, &prop_flags); | |
12007 | if (!xtensa_frag_flags_is_empty (&prop_flags)) | |
12008 | return TRUE; | |
12009 | } | |
12010 | } | |
12011 | return FALSE; | |
12012 | } | |
12013 | ||
12014 | ||
e0001a05 NC |
12015 | /* Two types of block sections exist right now: literal and insns. */ |
12016 | ||
7fa3d080 BW |
12017 | static void |
12018 | add_xt_block_frags (segT sec, | |
7fa3d080 BW |
12019 | xtensa_block_info **xt_block, |
12020 | frag_predicate property_function, | |
12021 | frag_predicate end_property_function) | |
e0001a05 | 12022 | { |
e0001a05 NC |
12023 | fragS *fragP; |
12024 | ||
e0001a05 NC |
12025 | /* Build it if needed. */ |
12026 | while (*xt_block != NULL) | |
12027 | xt_block = &(*xt_block)->next; | |
12028 | /* We are either at NULL at the beginning or at the end. */ | |
12029 | ||
12030 | /* Walk through the frags. */ | |
542f8b94 | 12031 | if (seg_info (sec)->frchainP) |
e0001a05 | 12032 | { |
542f8b94 | 12033 | for (fragP = seg_info (sec)->frchainP->frch_root; |
e0001a05 NC |
12034 | fragP; |
12035 | fragP = fragP->fr_next) | |
12036 | { | |
12037 | if (property_function (fragP) | |
12038 | && (fragP->fr_type != rs_fill || fragP->fr_fix != 0)) | |
12039 | { | |
12040 | if (*xt_block != NULL) | |
12041 | { | |
12042 | if ((*xt_block)->offset + (*xt_block)->size | |
12043 | == fragP->fr_address) | |
12044 | (*xt_block)->size += fragP->fr_fix; | |
12045 | else | |
12046 | xt_block = &((*xt_block)->next); | |
12047 | } | |
12048 | if (*xt_block == NULL) | |
12049 | { | |
325801bd | 12050 | xtensa_block_info *new_block = XNEW (xtensa_block_info); |
43cd72b9 BW |
12051 | new_block->sec = sec; |
12052 | new_block->offset = fragP->fr_address; | |
12053 | new_block->size = fragP->fr_fix; | |
12054 | new_block->next = NULL; | |
12055 | xtensa_frag_flags_init (&new_block->flags); | |
12056 | *xt_block = new_block; | |
12057 | } | |
12058 | if (end_property_function | |
12059 | && end_property_function (fragP)) | |
12060 | { | |
12061 | xt_block = &((*xt_block)->next); | |
12062 | } | |
12063 | } | |
12064 | } | |
12065 | } | |
12066 | } | |
12067 | ||
12068 | ||
12069 | /* Break the encapsulation of add_xt_prop_frags here. */ | |
12070 | ||
7fa3d080 BW |
12071 | static bfd_boolean |
12072 | xtensa_frag_flags_is_empty (const frag_flags *prop_flags) | |
43cd72b9 BW |
12073 | { |
12074 | if (prop_flags->is_literal | |
12075 | || prop_flags->is_insn | |
12076 | || prop_flags->is_data | |
12077 | || prop_flags->is_unreachable) | |
12078 | return FALSE; | |
12079 | return TRUE; | |
12080 | } | |
12081 | ||
12082 | ||
7fa3d080 BW |
12083 | static void |
12084 | xtensa_frag_flags_init (frag_flags *prop_flags) | |
43cd72b9 BW |
12085 | { |
12086 | memset (prop_flags, 0, sizeof (frag_flags)); | |
12087 | } | |
12088 | ||
12089 | ||
7fa3d080 BW |
12090 | static void |
12091 | get_frag_property_flags (const fragS *fragP, frag_flags *prop_flags) | |
43cd72b9 BW |
12092 | { |
12093 | xtensa_frag_flags_init (prop_flags); | |
12094 | if (fragP->tc_frag_data.is_literal) | |
12095 | prop_flags->is_literal = TRUE; | |
99ded152 BW |
12096 | if (fragP->tc_frag_data.is_specific_opcode |
12097 | || fragP->tc_frag_data.is_no_transform) | |
1f7efbae BW |
12098 | { |
12099 | prop_flags->is_no_transform = TRUE; | |
12100 | if (xtensa_frag_flags_is_empty (prop_flags)) | |
12101 | prop_flags->is_data = TRUE; | |
12102 | } | |
43cd72b9 | 12103 | if (fragP->tc_frag_data.is_unreachable) |
7fa3d080 | 12104 | prop_flags->is_unreachable = TRUE; |
43cd72b9 BW |
12105 | else if (fragP->tc_frag_data.is_insn) |
12106 | { | |
12107 | prop_flags->is_insn = TRUE; | |
12108 | if (fragP->tc_frag_data.is_loop_target) | |
12109 | prop_flags->insn.is_loop_target = TRUE; | |
12110 | if (fragP->tc_frag_data.is_branch_target) | |
12111 | prop_flags->insn.is_branch_target = TRUE; | |
43cd72b9 BW |
12112 | if (fragP->tc_frag_data.is_no_density) |
12113 | prop_flags->insn.is_no_density = TRUE; | |
12114 | if (fragP->tc_frag_data.use_absolute_literals) | |
12115 | prop_flags->insn.is_abslit = TRUE; | |
12116 | } | |
12117 | if (fragP->tc_frag_data.is_align) | |
12118 | { | |
12119 | prop_flags->is_align = TRUE; | |
12120 | prop_flags->alignment = fragP->tc_frag_data.alignment; | |
12121 | if (xtensa_frag_flags_is_empty (prop_flags)) | |
12122 | prop_flags->is_data = TRUE; | |
12123 | } | |
12124 | } | |
12125 | ||
12126 | ||
2f1bf5c1 | 12127 | static flagword |
7fa3d080 | 12128 | frag_flags_to_number (const frag_flags *prop_flags) |
43cd72b9 | 12129 | { |
2f1bf5c1 | 12130 | flagword num = 0; |
43cd72b9 BW |
12131 | if (prop_flags->is_literal) |
12132 | num |= XTENSA_PROP_LITERAL; | |
12133 | if (prop_flags->is_insn) | |
12134 | num |= XTENSA_PROP_INSN; | |
12135 | if (prop_flags->is_data) | |
12136 | num |= XTENSA_PROP_DATA; | |
12137 | if (prop_flags->is_unreachable) | |
12138 | num |= XTENSA_PROP_UNREACHABLE; | |
12139 | if (prop_flags->insn.is_loop_target) | |
12140 | num |= XTENSA_PROP_INSN_LOOP_TARGET; | |
12141 | if (prop_flags->insn.is_branch_target) | |
12142 | { | |
12143 | num |= XTENSA_PROP_INSN_BRANCH_TARGET; | |
12144 | num = SET_XTENSA_PROP_BT_ALIGN (num, prop_flags->insn.bt_align_priority); | |
12145 | } | |
12146 | ||
12147 | if (prop_flags->insn.is_no_density) | |
12148 | num |= XTENSA_PROP_INSN_NO_DENSITY; | |
99ded152 BW |
12149 | if (prop_flags->is_no_transform) |
12150 | num |= XTENSA_PROP_NO_TRANSFORM; | |
43cd72b9 BW |
12151 | if (prop_flags->insn.is_no_reorder) |
12152 | num |= XTENSA_PROP_INSN_NO_REORDER; | |
12153 | if (prop_flags->insn.is_abslit) | |
12154 | num |= XTENSA_PROP_INSN_ABSLIT; | |
12155 | ||
12156 | if (prop_flags->is_align) | |
12157 | { | |
12158 | num |= XTENSA_PROP_ALIGN; | |
12159 | num = SET_XTENSA_PROP_ALIGNMENT (num, prop_flags->alignment); | |
12160 | } | |
12161 | ||
12162 | return num; | |
12163 | } | |
12164 | ||
12165 | ||
12166 | static bfd_boolean | |
7fa3d080 BW |
12167 | xtensa_frag_flags_combinable (const frag_flags *prop_flags_1, |
12168 | const frag_flags *prop_flags_2) | |
43cd72b9 BW |
12169 | { |
12170 | /* Cannot combine with an end marker. */ | |
12171 | ||
12172 | if (prop_flags_1->is_literal != prop_flags_2->is_literal) | |
12173 | return FALSE; | |
12174 | if (prop_flags_1->is_insn != prop_flags_2->is_insn) | |
12175 | return FALSE; | |
12176 | if (prop_flags_1->is_data != prop_flags_2->is_data) | |
12177 | return FALSE; | |
12178 | ||
12179 | if (prop_flags_1->is_insn) | |
12180 | { | |
12181 | /* Properties of the beginning of the frag. */ | |
12182 | if (prop_flags_2->insn.is_loop_target) | |
12183 | return FALSE; | |
12184 | if (prop_flags_2->insn.is_branch_target) | |
12185 | return FALSE; | |
12186 | if (prop_flags_1->insn.is_no_density != | |
12187 | prop_flags_2->insn.is_no_density) | |
12188 | return FALSE; | |
99ded152 BW |
12189 | if (prop_flags_1->is_no_transform != |
12190 | prop_flags_2->is_no_transform) | |
43cd72b9 BW |
12191 | return FALSE; |
12192 | if (prop_flags_1->insn.is_no_reorder != | |
12193 | prop_flags_2->insn.is_no_reorder) | |
12194 | return FALSE; | |
12195 | if (prop_flags_1->insn.is_abslit != | |
12196 | prop_flags_2->insn.is_abslit) | |
12197 | return FALSE; | |
12198 | } | |
12199 | ||
12200 | if (prop_flags_1->is_align) | |
12201 | return FALSE; | |
12202 | ||
12203 | return TRUE; | |
12204 | } | |
12205 | ||
12206 | ||
7fa3d080 BW |
12207 | static bfd_vma |
12208 | xt_block_aligned_size (const xtensa_block_info *xt_block) | |
43cd72b9 BW |
12209 | { |
12210 | bfd_vma end_addr; | |
d77b99c9 | 12211 | unsigned align_bits; |
43cd72b9 BW |
12212 | |
12213 | if (!xt_block->flags.is_align) | |
12214 | return xt_block->size; | |
12215 | ||
12216 | end_addr = xt_block->offset + xt_block->size; | |
12217 | align_bits = xt_block->flags.alignment; | |
12218 | end_addr = ((end_addr + ((1 << align_bits) -1)) >> align_bits) << align_bits; | |
12219 | return end_addr - xt_block->offset; | |
12220 | } | |
12221 | ||
12222 | ||
12223 | static bfd_boolean | |
7fa3d080 BW |
12224 | xtensa_xt_block_combine (xtensa_block_info *xt_block, |
12225 | const xtensa_block_info *xt_block_2) | |
43cd72b9 BW |
12226 | { |
12227 | if (xt_block->sec != xt_block_2->sec) | |
12228 | return FALSE; | |
12229 | if (xt_block->offset + xt_block_aligned_size (xt_block) | |
12230 | != xt_block_2->offset) | |
12231 | return FALSE; | |
12232 | ||
12233 | if (xt_block_2->size == 0 | |
12234 | && (!xt_block_2->flags.is_unreachable | |
12235 | || xt_block->flags.is_unreachable)) | |
12236 | { | |
12237 | if (xt_block_2->flags.is_align | |
12238 | && xt_block->flags.is_align) | |
12239 | { | |
12240 | /* Nothing needed. */ | |
12241 | if (xt_block->flags.alignment >= xt_block_2->flags.alignment) | |
12242 | return TRUE; | |
12243 | } | |
12244 | else | |
12245 | { | |
12246 | if (xt_block_2->flags.is_align) | |
12247 | { | |
12248 | /* Push alignment to previous entry. */ | |
12249 | xt_block->flags.is_align = xt_block_2->flags.is_align; | |
12250 | xt_block->flags.alignment = xt_block_2->flags.alignment; | |
12251 | } | |
12252 | return TRUE; | |
12253 | } | |
12254 | } | |
12255 | if (!xtensa_frag_flags_combinable (&xt_block->flags, | |
12256 | &xt_block_2->flags)) | |
12257 | return FALSE; | |
12258 | ||
12259 | xt_block->size += xt_block_2->size; | |
12260 | ||
12261 | if (xt_block_2->flags.is_align) | |
12262 | { | |
12263 | xt_block->flags.is_align = TRUE; | |
12264 | xt_block->flags.alignment = xt_block_2->flags.alignment; | |
12265 | } | |
12266 | ||
12267 | return TRUE; | |
12268 | } | |
12269 | ||
12270 | ||
7fa3d080 BW |
12271 | static void |
12272 | add_xt_prop_frags (segT sec, | |
7fa3d080 BW |
12273 | xtensa_block_info **xt_block, |
12274 | frag_flags_fn property_function) | |
43cd72b9 | 12275 | { |
43cd72b9 BW |
12276 | fragS *fragP; |
12277 | ||
43cd72b9 BW |
12278 | /* Build it if needed. */ |
12279 | while (*xt_block != NULL) | |
12280 | { | |
12281 | xt_block = &(*xt_block)->next; | |
12282 | } | |
12283 | /* We are either at NULL at the beginning or at the end. */ | |
12284 | ||
12285 | /* Walk through the frags. */ | |
542f8b94 | 12286 | if (seg_info (sec)->frchainP) |
43cd72b9 | 12287 | { |
542f8b94 | 12288 | for (fragP = seg_info (sec)->frchainP->frch_root; fragP; |
43cd72b9 BW |
12289 | fragP = fragP->fr_next) |
12290 | { | |
12291 | xtensa_block_info tmp_block; | |
12292 | tmp_block.sec = sec; | |
12293 | tmp_block.offset = fragP->fr_address; | |
12294 | tmp_block.size = fragP->fr_fix; | |
12295 | tmp_block.next = NULL; | |
12296 | property_function (fragP, &tmp_block.flags); | |
12297 | ||
12298 | if (!xtensa_frag_flags_is_empty (&tmp_block.flags)) | |
12299 | /* && fragP->fr_fix != 0) */ | |
12300 | { | |
12301 | if ((*xt_block) == NULL | |
12302 | || !xtensa_xt_block_combine (*xt_block, &tmp_block)) | |
12303 | { | |
12304 | xtensa_block_info *new_block; | |
12305 | if ((*xt_block) != NULL) | |
12306 | xt_block = &(*xt_block)->next; | |
325801bd | 12307 | new_block = XNEW (xtensa_block_info); |
43cd72b9 BW |
12308 | *new_block = tmp_block; |
12309 | *xt_block = new_block; | |
12310 | } | |
12311 | } | |
12312 | } | |
12313 | } | |
12314 | } | |
12315 | ||
12316 | \f | |
12317 | /* op_placement_info_table */ | |
12318 | ||
12319 | /* op_placement_info makes it easier to determine which | |
12320 | ops can go in which slots. */ | |
12321 | ||
12322 | static void | |
7fa3d080 | 12323 | init_op_placement_info_table (void) |
43cd72b9 BW |
12324 | { |
12325 | xtensa_isa isa = xtensa_default_isa; | |
12326 | xtensa_insnbuf ibuf = xtensa_insnbuf_alloc (isa); | |
12327 | xtensa_opcode opcode; | |
12328 | xtensa_format fmt; | |
12329 | int slot; | |
12330 | int num_opcodes = xtensa_isa_num_opcodes (isa); | |
12331 | ||
325801bd | 12332 | op_placement_table = XNEWVEC (op_placement_info, num_opcodes); |
9c2799c2 | 12333 | gas_assert (xtensa_isa_num_formats (isa) < MAX_FORMATS); |
43cd72b9 BW |
12334 | |
12335 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
12336 | { | |
12337 | op_placement_info *opi = &op_placement_table[opcode]; | |
12338 | /* FIXME: Make tinsn allocation dynamic. */ | |
51add5c3 | 12339 | if (xtensa_opcode_num_operands (isa, opcode) > MAX_INSN_ARGS) |
43cd72b9 | 12340 | as_fatal (_("too many operands in instruction")); |
43cd72b9 BW |
12341 | opi->narrowest = XTENSA_UNDEFINED; |
12342 | opi->narrowest_size = 0x7F; | |
b2d179be | 12343 | opi->narrowest_slot = 0; |
43cd72b9 BW |
12344 | opi->formats = 0; |
12345 | opi->num_formats = 0; | |
12346 | opi->issuef = 0; | |
12347 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
12348 | { | |
12349 | opi->slots[fmt] = 0; | |
12350 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
12351 | { | |
12352 | if (xtensa_opcode_encode (isa, fmt, slot, ibuf, opcode) == 0) | |
12353 | { | |
12354 | int fmt_length = xtensa_format_length (isa, fmt); | |
12355 | opi->issuef++; | |
12356 | set_bit (fmt, opi->formats); | |
12357 | set_bit (slot, opi->slots[fmt]); | |
a02728c8 BW |
12358 | if (fmt_length < opi->narrowest_size |
12359 | || (fmt_length == opi->narrowest_size | |
12360 | && (xtensa_format_num_slots (isa, fmt) | |
12361 | < xtensa_format_num_slots (isa, | |
12362 | opi->narrowest)))) | |
43cd72b9 BW |
12363 | { |
12364 | opi->narrowest = fmt; | |
12365 | opi->narrowest_size = fmt_length; | |
b2d179be | 12366 | opi->narrowest_slot = slot; |
43cd72b9 | 12367 | } |
e0001a05 NC |
12368 | } |
12369 | } | |
43cd72b9 BW |
12370 | if (opi->formats) |
12371 | opi->num_formats++; | |
e0001a05 NC |
12372 | } |
12373 | } | |
43cd72b9 BW |
12374 | xtensa_insnbuf_free (isa, ibuf); |
12375 | } | |
12376 | ||
12377 | ||
12378 | bfd_boolean | |
7fa3d080 | 12379 | opcode_fits_format_slot (xtensa_opcode opcode, xtensa_format fmt, int slot) |
43cd72b9 BW |
12380 | { |
12381 | return bit_is_set (slot, op_placement_table[opcode].slots[fmt]); | |
12382 | } | |
12383 | ||
12384 | ||
12385 | /* If the opcode is available in a single slot format, return its size. */ | |
12386 | ||
7fa3d080 BW |
12387 | static int |
12388 | xg_get_single_size (xtensa_opcode opcode) | |
43cd72b9 | 12389 | { |
b2d179be | 12390 | return op_placement_table[opcode].narrowest_size; |
43cd72b9 BW |
12391 | } |
12392 | ||
12393 | ||
7fa3d080 BW |
12394 | static xtensa_format |
12395 | xg_get_single_format (xtensa_opcode opcode) | |
43cd72b9 | 12396 | { |
b2d179be BW |
12397 | return op_placement_table[opcode].narrowest; |
12398 | } | |
12399 | ||
12400 | ||
12401 | static int | |
12402 | xg_get_single_slot (xtensa_opcode opcode) | |
12403 | { | |
12404 | return op_placement_table[opcode].narrowest_slot; | |
e0001a05 NC |
12405 | } |
12406 | ||
12407 | \f | |
12408 | /* Instruction Stack Functions (from "xtensa-istack.h"). */ | |
12409 | ||
12410 | void | |
7fa3d080 | 12411 | istack_init (IStack *stack) |
e0001a05 | 12412 | { |
e0001a05 NC |
12413 | stack->ninsn = 0; |
12414 | } | |
12415 | ||
12416 | ||
12417 | bfd_boolean | |
7fa3d080 | 12418 | istack_empty (IStack *stack) |
e0001a05 NC |
12419 | { |
12420 | return (stack->ninsn == 0); | |
12421 | } | |
12422 | ||
12423 | ||
12424 | bfd_boolean | |
7fa3d080 | 12425 | istack_full (IStack *stack) |
e0001a05 NC |
12426 | { |
12427 | return (stack->ninsn == MAX_ISTACK); | |
12428 | } | |
12429 | ||
12430 | ||
12431 | /* Return a pointer to the top IStack entry. | |
43cd72b9 | 12432 | It is an error to call this if istack_empty () is TRUE. */ |
e0001a05 NC |
12433 | |
12434 | TInsn * | |
7fa3d080 | 12435 | istack_top (IStack *stack) |
e0001a05 NC |
12436 | { |
12437 | int rec = stack->ninsn - 1; | |
9c2799c2 | 12438 | gas_assert (!istack_empty (stack)); |
e0001a05 NC |
12439 | return &stack->insn[rec]; |
12440 | } | |
12441 | ||
12442 | ||
12443 | /* Add a new TInsn to an IStack. | |
43cd72b9 | 12444 | It is an error to call this if istack_full () is TRUE. */ |
e0001a05 NC |
12445 | |
12446 | void | |
7fa3d080 | 12447 | istack_push (IStack *stack, TInsn *insn) |
e0001a05 NC |
12448 | { |
12449 | int rec = stack->ninsn; | |
9c2799c2 | 12450 | gas_assert (!istack_full (stack)); |
43cd72b9 | 12451 | stack->insn[rec] = *insn; |
e0001a05 NC |
12452 | stack->ninsn++; |
12453 | } | |
12454 | ||
12455 | ||
12456 | /* Clear space for the next TInsn on the IStack and return a pointer | |
43cd72b9 | 12457 | to it. It is an error to call this if istack_full () is TRUE. */ |
e0001a05 NC |
12458 | |
12459 | TInsn * | |
7fa3d080 | 12460 | istack_push_space (IStack *stack) |
e0001a05 NC |
12461 | { |
12462 | int rec = stack->ninsn; | |
12463 | TInsn *insn; | |
9c2799c2 | 12464 | gas_assert (!istack_full (stack)); |
e0001a05 | 12465 | insn = &stack->insn[rec]; |
60242db2 | 12466 | tinsn_init (insn); |
e0001a05 NC |
12467 | stack->ninsn++; |
12468 | return insn; | |
12469 | } | |
12470 | ||
12471 | ||
12472 | /* Remove the last pushed instruction. It is an error to call this if | |
43cd72b9 | 12473 | istack_empty () returns TRUE. */ |
e0001a05 NC |
12474 | |
12475 | void | |
7fa3d080 | 12476 | istack_pop (IStack *stack) |
e0001a05 NC |
12477 | { |
12478 | int rec = stack->ninsn - 1; | |
9c2799c2 | 12479 | gas_assert (!istack_empty (stack)); |
e0001a05 | 12480 | stack->ninsn--; |
60242db2 | 12481 | tinsn_init (&stack->insn[rec]); |
e0001a05 NC |
12482 | } |
12483 | ||
12484 | \f | |
12485 | /* TInsn functions. */ | |
12486 | ||
12487 | void | |
7fa3d080 | 12488 | tinsn_init (TInsn *dst) |
e0001a05 NC |
12489 | { |
12490 | memset (dst, 0, sizeof (TInsn)); | |
12491 | } | |
12492 | ||
12493 | ||
43cd72b9 | 12494 | /* Return TRUE if ANY of the operands in the insn are symbolic. */ |
e0001a05 NC |
12495 | |
12496 | static bfd_boolean | |
7fa3d080 | 12497 | tinsn_has_symbolic_operands (const TInsn *insn) |
e0001a05 NC |
12498 | { |
12499 | int i; | |
12500 | int n = insn->ntok; | |
12501 | ||
9c2799c2 | 12502 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
12503 | |
12504 | for (i = 0; i < n; ++i) | |
12505 | { | |
12506 | switch (insn->tok[i].X_op) | |
12507 | { | |
12508 | case O_register: | |
12509 | case O_constant: | |
12510 | break; | |
12511 | default: | |
12512 | return TRUE; | |
12513 | } | |
12514 | } | |
12515 | return FALSE; | |
12516 | } | |
12517 | ||
12518 | ||
12519 | bfd_boolean | |
7fa3d080 | 12520 | tinsn_has_invalid_symbolic_operands (const TInsn *insn) |
e0001a05 | 12521 | { |
43cd72b9 | 12522 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
12523 | int i; |
12524 | int n = insn->ntok; | |
12525 | ||
9c2799c2 | 12526 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
12527 | |
12528 | for (i = 0; i < n; ++i) | |
12529 | { | |
12530 | switch (insn->tok[i].X_op) | |
12531 | { | |
12532 | case O_register: | |
12533 | case O_constant: | |
12534 | break; | |
43cd72b9 BW |
12535 | case O_big: |
12536 | case O_illegal: | |
12537 | case O_absent: | |
12538 | /* Errors for these types are caught later. */ | |
12539 | break; | |
12540 | case O_hi16: | |
12541 | case O_lo16: | |
e0001a05 | 12542 | default: |
43cd72b9 BW |
12543 | /* Symbolic immediates are only allowed on the last immediate |
12544 | operand. At this time, CONST16 is the only opcode where we | |
e7da6241 | 12545 | support non-PC-relative relocations. */ |
43cd72b9 BW |
12546 | if (i != get_relaxable_immed (insn->opcode) |
12547 | || (xtensa_operand_is_PCrelative (isa, insn->opcode, i) != 1 | |
12548 | && insn->opcode != xtensa_const16_opcode)) | |
12549 | { | |
431ad2d0 | 12550 | as_bad (_("invalid symbolic operand")); |
43cd72b9 BW |
12551 | return TRUE; |
12552 | } | |
e0001a05 NC |
12553 | } |
12554 | } | |
12555 | return FALSE; | |
12556 | } | |
12557 | ||
12558 | ||
12559 | /* For assembly code with complex expressions (e.g. subtraction), | |
12560 | we have to build them in the literal pool so that | |
12561 | their results are calculated correctly after relaxation. | |
12562 | The relaxation only handles expressions that | |
12563 | boil down to SYMBOL + OFFSET. */ | |
12564 | ||
12565 | static bfd_boolean | |
7fa3d080 | 12566 | tinsn_has_complex_operands (const TInsn *insn) |
e0001a05 NC |
12567 | { |
12568 | int i; | |
12569 | int n = insn->ntok; | |
9c2799c2 | 12570 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
12571 | for (i = 0; i < n; ++i) |
12572 | { | |
12573 | switch (insn->tok[i].X_op) | |
12574 | { | |
12575 | case O_register: | |
12576 | case O_constant: | |
12577 | case O_symbol: | |
43cd72b9 BW |
12578 | case O_lo16: |
12579 | case O_hi16: | |
e0001a05 NC |
12580 | break; |
12581 | default: | |
12582 | return TRUE; | |
12583 | } | |
12584 | } | |
12585 | return FALSE; | |
12586 | } | |
12587 | ||
12588 | ||
b2d179be BW |
12589 | /* Encode a TInsn opcode and its constant operands into slotbuf. |
12590 | Return TRUE if there is a symbol in the immediate field. This | |
12591 | function assumes that: | |
12592 | 1) The number of operands are correct. | |
12593 | 2) The insn_type is ITYPE_INSN. | |
12594 | 3) The opcode can be encoded in the specified format and slot. | |
12595 | 4) Operands are either O_constant or O_symbol, and all constants fit. */ | |
43cd72b9 BW |
12596 | |
12597 | static bfd_boolean | |
7fa3d080 BW |
12598 | tinsn_to_slotbuf (xtensa_format fmt, |
12599 | int slot, | |
12600 | TInsn *tinsn, | |
12601 | xtensa_insnbuf slotbuf) | |
43cd72b9 BW |
12602 | { |
12603 | xtensa_isa isa = xtensa_default_isa; | |
12604 | xtensa_opcode opcode = tinsn->opcode; | |
12605 | bfd_boolean has_fixup = FALSE; | |
12606 | int noperands = xtensa_opcode_num_operands (isa, opcode); | |
12607 | int i; | |
12608 | ||
9c2799c2 | 12609 | gas_assert (tinsn->insn_type == ITYPE_INSN); |
43cd72b9 BW |
12610 | if (noperands != tinsn->ntok) |
12611 | as_fatal (_("operand number mismatch")); | |
12612 | ||
12613 | if (xtensa_opcode_encode (isa, fmt, slot, slotbuf, opcode)) | |
12614 | { | |
12615 | as_bad (_("cannot encode opcode \"%s\" in the given format \"%s\""), | |
12616 | xtensa_opcode_name (isa, opcode), xtensa_format_name (isa, fmt)); | |
12617 | return FALSE; | |
12618 | } | |
12619 | ||
12620 | for (i = 0; i < noperands; i++) | |
12621 | { | |
91d6fa6a | 12622 | expressionS *exp = &tinsn->tok[i]; |
d77b99c9 BW |
12623 | int rc; |
12624 | unsigned line; | |
3b4dbbbf | 12625 | const char *file_name; |
43cd72b9 BW |
12626 | uint32 opnd_value; |
12627 | ||
91d6fa6a | 12628 | switch (exp->X_op) |
43cd72b9 BW |
12629 | { |
12630 | case O_register: | |
12631 | if (xtensa_operand_is_visible (isa, opcode, i) == 0) | |
12632 | break; | |
12633 | /* The register number has already been checked in | |
12634 | expression_maybe_register, so we don't need to check here. */ | |
91d6fa6a | 12635 | opnd_value = exp->X_add_number; |
43cd72b9 BW |
12636 | (void) xtensa_operand_encode (isa, opcode, i, &opnd_value); |
12637 | rc = xtensa_operand_set_field (isa, opcode, i, fmt, slot, slotbuf, | |
12638 | opnd_value); | |
12639 | if (rc != 0) | |
12640 | as_warn (_("xtensa-isa failure: %s"), xtensa_isa_error_msg (isa)); | |
12641 | break; | |
12642 | ||
12643 | case O_constant: | |
12644 | if (xtensa_operand_is_visible (isa, opcode, i) == 0) | |
12645 | break; | |
3b4dbbbf | 12646 | file_name = as_where (&line); |
43cd72b9 BW |
12647 | /* It is a constant and we called this function |
12648 | then we have to try to fit it. */ | |
12649 | xtensa_insnbuf_set_operand (slotbuf, fmt, slot, opcode, i, | |
91d6fa6a | 12650 | exp->X_add_number, file_name, line); |
e0001a05 NC |
12651 | break; |
12652 | ||
e0001a05 NC |
12653 | default: |
12654 | has_fixup = TRUE; | |
12655 | break; | |
12656 | } | |
12657 | } | |
43cd72b9 | 12658 | |
e0001a05 NC |
12659 | return has_fixup; |
12660 | } | |
12661 | ||
12662 | ||
b2d179be BW |
12663 | /* Encode a single TInsn into an insnbuf. If the opcode can only be encoded |
12664 | into a multi-slot instruction, fill the other slots with NOPs. | |
12665 | Return TRUE if there is a symbol in the immediate field. See also the | |
12666 | assumptions listed for tinsn_to_slotbuf. */ | |
12667 | ||
12668 | static bfd_boolean | |
12669 | tinsn_to_insnbuf (TInsn *tinsn, xtensa_insnbuf insnbuf) | |
12670 | { | |
12671 | static xtensa_insnbuf slotbuf = 0; | |
12672 | static vliw_insn vinsn; | |
12673 | xtensa_isa isa = xtensa_default_isa; | |
12674 | bfd_boolean has_fixup = FALSE; | |
12675 | int i; | |
12676 | ||
12677 | if (!slotbuf) | |
12678 | { | |
12679 | slotbuf = xtensa_insnbuf_alloc (isa); | |
12680 | xg_init_vinsn (&vinsn); | |
12681 | } | |
12682 | ||
12683 | xg_clear_vinsn (&vinsn); | |
12684 | ||
12685 | bundle_tinsn (tinsn, &vinsn); | |
12686 | ||
12687 | xtensa_format_encode (isa, vinsn.format, insnbuf); | |
12688 | ||
12689 | for (i = 0; i < vinsn.num_slots; i++) | |
12690 | { | |
12691 | /* Only one slot may have a fix-up because the rest contains NOPs. */ | |
12692 | has_fixup |= | |
12693 | tinsn_to_slotbuf (vinsn.format, i, &vinsn.slots[i], vinsn.slotbuf[i]); | |
12694 | xtensa_format_set_slot (isa, vinsn.format, i, insnbuf, vinsn.slotbuf[i]); | |
12695 | } | |
12696 | ||
12697 | return has_fixup; | |
12698 | } | |
12699 | ||
12700 | ||
43cd72b9 | 12701 | /* Check the instruction arguments. Return TRUE on failure. */ |
e0001a05 | 12702 | |
7fa3d080 BW |
12703 | static bfd_boolean |
12704 | tinsn_check_arguments (const TInsn *insn) | |
e0001a05 NC |
12705 | { |
12706 | xtensa_isa isa = xtensa_default_isa; | |
12707 | xtensa_opcode opcode = insn->opcode; | |
6dc6b655 BW |
12708 | xtensa_regfile t1_regfile, t2_regfile; |
12709 | int t1_reg, t2_reg; | |
12710 | int t1_base_reg, t1_last_reg; | |
12711 | int t2_base_reg, t2_last_reg; | |
12712 | char t1_inout, t2_inout; | |
12713 | int i, j; | |
e0001a05 NC |
12714 | |
12715 | if (opcode == XTENSA_UNDEFINED) | |
12716 | { | |
12717 | as_bad (_("invalid opcode")); | |
12718 | return TRUE; | |
12719 | } | |
12720 | ||
43cd72b9 | 12721 | if (xtensa_opcode_num_operands (isa, opcode) > insn->ntok) |
e0001a05 NC |
12722 | { |
12723 | as_bad (_("too few operands")); | |
12724 | return TRUE; | |
12725 | } | |
12726 | ||
43cd72b9 | 12727 | if (xtensa_opcode_num_operands (isa, opcode) < insn->ntok) |
e0001a05 NC |
12728 | { |
12729 | as_bad (_("too many operands")); | |
12730 | return TRUE; | |
12731 | } | |
6dc6b655 BW |
12732 | |
12733 | /* Check registers. */ | |
12734 | for (j = 0; j < insn->ntok; j++) | |
12735 | { | |
12736 | if (xtensa_operand_is_register (isa, insn->opcode, j) != 1) | |
12737 | continue; | |
12738 | ||
12739 | t2_regfile = xtensa_operand_regfile (isa, insn->opcode, j); | |
12740 | t2_base_reg = insn->tok[j].X_add_number; | |
12741 | t2_last_reg | |
12742 | = t2_base_reg + xtensa_operand_num_regs (isa, insn->opcode, j); | |
12743 | ||
12744 | for (i = 0; i < insn->ntok; i++) | |
12745 | { | |
12746 | if (i == j) | |
12747 | continue; | |
12748 | ||
12749 | if (xtensa_operand_is_register (isa, insn->opcode, i) != 1) | |
12750 | continue; | |
12751 | ||
12752 | t1_regfile = xtensa_operand_regfile (isa, insn->opcode, i); | |
12753 | ||
12754 | if (t1_regfile != t2_regfile) | |
12755 | continue; | |
12756 | ||
12757 | t1_inout = xtensa_operand_inout (isa, insn->opcode, i); | |
12758 | t2_inout = xtensa_operand_inout (isa, insn->opcode, j); | |
12759 | ||
12760 | t1_base_reg = insn->tok[i].X_add_number; | |
12761 | t1_last_reg = (t1_base_reg | |
12762 | + xtensa_operand_num_regs (isa, insn->opcode, i)); | |
12763 | ||
12764 | for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++) | |
12765 | { | |
12766 | for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++) | |
12767 | { | |
12768 | if (t1_reg != t2_reg) | |
12769 | continue; | |
12770 | ||
12771 | if (t1_inout != 'i' && t2_inout != 'i') | |
12772 | { | |
12773 | as_bad (_("multiple writes to the same register")); | |
12774 | return TRUE; | |
12775 | } | |
12776 | } | |
12777 | } | |
12778 | } | |
12779 | } | |
e0001a05 NC |
12780 | return FALSE; |
12781 | } | |
12782 | ||
12783 | ||
12784 | /* Load an instruction from its encoded form. */ | |
12785 | ||
12786 | static void | |
7fa3d080 | 12787 | tinsn_from_chars (TInsn *tinsn, char *f, int slot) |
e0001a05 | 12788 | { |
43cd72b9 | 12789 | vliw_insn vinsn; |
e0001a05 | 12790 | |
43cd72b9 BW |
12791 | xg_init_vinsn (&vinsn); |
12792 | vinsn_from_chars (&vinsn, f); | |
12793 | ||
12794 | *tinsn = vinsn.slots[slot]; | |
12795 | xg_free_vinsn (&vinsn); | |
12796 | } | |
e0001a05 | 12797 | |
43cd72b9 BW |
12798 | |
12799 | static void | |
7fa3d080 BW |
12800 | tinsn_from_insnbuf (TInsn *tinsn, |
12801 | xtensa_insnbuf slotbuf, | |
12802 | xtensa_format fmt, | |
12803 | int slot) | |
43cd72b9 BW |
12804 | { |
12805 | int i; | |
12806 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 NC |
12807 | |
12808 | /* Find the immed. */ | |
43cd72b9 BW |
12809 | tinsn_init (tinsn); |
12810 | tinsn->insn_type = ITYPE_INSN; | |
12811 | tinsn->is_specific_opcode = FALSE; /* must not be specific */ | |
12812 | tinsn->opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
12813 | tinsn->ntok = xtensa_opcode_num_operands (isa, tinsn->opcode); | |
12814 | for (i = 0; i < tinsn->ntok; i++) | |
e0001a05 | 12815 | { |
43cd72b9 BW |
12816 | set_expr_const (&tinsn->tok[i], |
12817 | xtensa_insnbuf_get_operand (slotbuf, fmt, slot, | |
12818 | tinsn->opcode, i)); | |
e0001a05 NC |
12819 | } |
12820 | } | |
12821 | ||
12822 | ||
12823 | /* Read the value of the relaxable immed from the fr_symbol and fr_offset. */ | |
12824 | ||
12825 | static void | |
7fa3d080 | 12826 | tinsn_immed_from_frag (TInsn *tinsn, fragS *fragP, int slot) |
e0001a05 | 12827 | { |
43cd72b9 | 12828 | xtensa_opcode opcode = tinsn->opcode; |
e0001a05 NC |
12829 | int opnum; |
12830 | ||
43cd72b9 | 12831 | if (fragP->tc_frag_data.slot_symbols[slot]) |
e0001a05 NC |
12832 | { |
12833 | opnum = get_relaxable_immed (opcode); | |
9c2799c2 | 12834 | gas_assert (opnum >= 0); |
e7da6241 BW |
12835 | set_expr_symbol_offset (&tinsn->tok[opnum], |
12836 | fragP->tc_frag_data.slot_symbols[slot], | |
12837 | fragP->tc_frag_data.slot_offsets[slot]); | |
e0001a05 | 12838 | } |
19e8f41a | 12839 | tinsn->extra_arg = fragP->tc_frag_data.free_reg[slot]; |
e0001a05 NC |
12840 | } |
12841 | ||
12842 | ||
12843 | static int | |
7fa3d080 | 12844 | get_num_stack_text_bytes (IStack *istack) |
e0001a05 NC |
12845 | { |
12846 | int i; | |
12847 | int text_bytes = 0; | |
12848 | ||
12849 | for (i = 0; i < istack->ninsn; i++) | |
12850 | { | |
43cd72b9 BW |
12851 | TInsn *tinsn = &istack->insn[i]; |
12852 | if (tinsn->insn_type == ITYPE_INSN) | |
12853 | text_bytes += xg_get_single_size (tinsn->opcode); | |
e0001a05 NC |
12854 | } |
12855 | return text_bytes; | |
12856 | } | |
12857 | ||
12858 | ||
12859 | static int | |
7fa3d080 | 12860 | get_num_stack_literal_bytes (IStack *istack) |
e0001a05 NC |
12861 | { |
12862 | int i; | |
12863 | int lit_bytes = 0; | |
12864 | ||
12865 | for (i = 0; i < istack->ninsn; i++) | |
12866 | { | |
43cd72b9 BW |
12867 | TInsn *tinsn = &istack->insn[i]; |
12868 | if (tinsn->insn_type == ITYPE_LITERAL && tinsn->ntok == 1) | |
e0001a05 NC |
12869 | lit_bytes += 4; |
12870 | } | |
12871 | return lit_bytes; | |
12872 | } | |
12873 | ||
43cd72b9 BW |
12874 | \f |
12875 | /* vliw_insn functions. */ | |
12876 | ||
7fa3d080 BW |
12877 | static void |
12878 | xg_init_vinsn (vliw_insn *v) | |
43cd72b9 BW |
12879 | { |
12880 | int i; | |
12881 | xtensa_isa isa = xtensa_default_isa; | |
12882 | ||
12883 | xg_clear_vinsn (v); | |
12884 | ||
12885 | v->insnbuf = xtensa_insnbuf_alloc (isa); | |
12886 | if (v->insnbuf == NULL) | |
12887 | as_fatal (_("out of memory")); | |
12888 | ||
62af60e2 | 12889 | for (i = 0; i < config_max_slots; i++) |
43cd72b9 | 12890 | { |
43cd72b9 BW |
12891 | v->slotbuf[i] = xtensa_insnbuf_alloc (isa); |
12892 | if (v->slotbuf[i] == NULL) | |
12893 | as_fatal (_("out of memory")); | |
12894 | } | |
12895 | } | |
12896 | ||
12897 | ||
7fa3d080 BW |
12898 | static void |
12899 | xg_clear_vinsn (vliw_insn *v) | |
43cd72b9 BW |
12900 | { |
12901 | int i; | |
65738a7d | 12902 | |
3739860c | 12903 | memset (v, 0, offsetof (vliw_insn, slots) |
62af60e2 | 12904 | + sizeof(TInsn) * config_max_slots); |
65738a7d | 12905 | |
43cd72b9 BW |
12906 | v->format = XTENSA_UNDEFINED; |
12907 | v->num_slots = 0; | |
12908 | v->inside_bundle = FALSE; | |
12909 | ||
12910 | if (xt_saved_debug_type != DEBUG_NONE) | |
12911 | debug_type = xt_saved_debug_type; | |
12912 | ||
62af60e2 | 12913 | for (i = 0; i < config_max_slots; i++) |
65738a7d | 12914 | v->slots[i].opcode = XTENSA_UNDEFINED; |
43cd72b9 BW |
12915 | } |
12916 | ||
12917 | ||
d8392fd9 SA |
12918 | static void |
12919 | xg_copy_vinsn (vliw_insn *dst, vliw_insn *src) | |
12920 | { | |
3739860c | 12921 | memcpy (dst, src, |
d8392fd9 SA |
12922 | offsetof(vliw_insn, slots) + src->num_slots * sizeof(TInsn)); |
12923 | dst->insnbuf = src->insnbuf; | |
12924 | memcpy (dst->slotbuf, src->slotbuf, src->num_slots * sizeof(xtensa_insnbuf)); | |
12925 | } | |
12926 | ||
12927 | ||
7fa3d080 BW |
12928 | static bfd_boolean |
12929 | vinsn_has_specific_opcodes (vliw_insn *v) | |
43cd72b9 BW |
12930 | { |
12931 | int i; | |
c138bc38 | 12932 | |
43cd72b9 BW |
12933 | for (i = 0; i < v->num_slots; i++) |
12934 | { | |
12935 | if (v->slots[i].is_specific_opcode) | |
12936 | return TRUE; | |
12937 | } | |
12938 | return FALSE; | |
12939 | } | |
12940 | ||
12941 | ||
7fa3d080 BW |
12942 | static void |
12943 | xg_free_vinsn (vliw_insn *v) | |
43cd72b9 BW |
12944 | { |
12945 | int i; | |
12946 | xtensa_insnbuf_free (xtensa_default_isa, v->insnbuf); | |
62af60e2 | 12947 | for (i = 0; i < config_max_slots; i++) |
43cd72b9 BW |
12948 | xtensa_insnbuf_free (xtensa_default_isa, v->slotbuf[i]); |
12949 | } | |
12950 | ||
12951 | ||
e7da6241 BW |
12952 | /* Encode a vliw_insn into an insnbuf. Return TRUE if there are any symbolic |
12953 | operands. See also the assumptions listed for tinsn_to_slotbuf. */ | |
43cd72b9 BW |
12954 | |
12955 | static bfd_boolean | |
7fa3d080 BW |
12956 | vinsn_to_insnbuf (vliw_insn *vinsn, |
12957 | char *frag_offset, | |
12958 | fragS *fragP, | |
12959 | bfd_boolean record_fixup) | |
43cd72b9 BW |
12960 | { |
12961 | xtensa_isa isa = xtensa_default_isa; | |
12962 | xtensa_format fmt = vinsn->format; | |
12963 | xtensa_insnbuf insnbuf = vinsn->insnbuf; | |
12964 | int slot; | |
12965 | bfd_boolean has_fixup = FALSE; | |
12966 | ||
12967 | xtensa_format_encode (isa, fmt, insnbuf); | |
12968 | ||
12969 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
12970 | { | |
12971 | TInsn *tinsn = &vinsn->slots[slot]; | |
19e8f41a | 12972 | expressionS *extra_arg = &tinsn->extra_arg; |
43cd72b9 BW |
12973 | bfd_boolean tinsn_has_fixup = |
12974 | tinsn_to_slotbuf (vinsn->format, slot, tinsn, | |
12975 | vinsn->slotbuf[slot]); | |
12976 | ||
12977 | xtensa_format_set_slot (isa, fmt, slot, | |
12978 | insnbuf, vinsn->slotbuf[slot]); | |
19e8f41a | 12979 | if (extra_arg->X_op != O_illegal && extra_arg->X_op != O_register) |
28dbbc02 BW |
12980 | { |
12981 | if (vinsn->num_slots != 1) | |
12982 | as_bad (_("TLS relocation not allowed in FLIX bundle")); | |
12983 | else if (record_fixup) | |
12984 | /* Instructions that generate TLS relocations should always be | |
12985 | relaxed in the front-end. If "record_fixup" is set, then this | |
12986 | function is being called during back-end relaxation, so flag | |
12987 | the unexpected behavior as an error. */ | |
12988 | as_bad (_("unexpected TLS relocation")); | |
12989 | else | |
12990 | fix_new (fragP, frag_offset - fragP->fr_literal, | |
12991 | xtensa_format_length (isa, fmt), | |
19e8f41a BW |
12992 | extra_arg->X_add_symbol, extra_arg->X_add_number, |
12993 | FALSE, map_operator_to_reloc (extra_arg->X_op, FALSE)); | |
28dbbc02 | 12994 | } |
e7da6241 | 12995 | if (tinsn_has_fixup) |
43cd72b9 BW |
12996 | { |
12997 | int i; | |
12998 | xtensa_opcode opcode = tinsn->opcode; | |
12999 | int noperands = xtensa_opcode_num_operands (isa, opcode); | |
13000 | has_fixup = TRUE; | |
13001 | ||
13002 | for (i = 0; i < noperands; i++) | |
13003 | { | |
91d6fa6a NC |
13004 | expressionS* exp = &tinsn->tok[i]; |
13005 | switch (exp->X_op) | |
43cd72b9 BW |
13006 | { |
13007 | case O_symbol: | |
13008 | case O_lo16: | |
13009 | case O_hi16: | |
13010 | if (get_relaxable_immed (opcode) == i) | |
13011 | { | |
e7da6241 BW |
13012 | /* Add a fix record for the instruction, except if this |
13013 | function is being called prior to relaxation, i.e., | |
13014 | if record_fixup is false, and the instruction might | |
13015 | be relaxed later. */ | |
13016 | if (record_fixup | |
13017 | || tinsn->is_specific_opcode | |
13018 | || !xg_is_relaxable_insn (tinsn, 0)) | |
43cd72b9 | 13019 | { |
91d6fa6a | 13020 | xg_add_opcode_fix (tinsn, i, fmt, slot, exp, fragP, |
e7da6241 | 13021 | frag_offset - fragP->fr_literal); |
43cd72b9 BW |
13022 | } |
13023 | else | |
13024 | { | |
91d6fa6a | 13025 | if (exp->X_op != O_symbol) |
e7da6241 | 13026 | as_bad (_("invalid operand")); |
91d6fa6a NC |
13027 | tinsn->symbol = exp->X_add_symbol; |
13028 | tinsn->offset = exp->X_add_number; | |
43cd72b9 BW |
13029 | } |
13030 | } | |
13031 | else | |
e7da6241 | 13032 | as_bad (_("symbolic operand not allowed")); |
43cd72b9 BW |
13033 | break; |
13034 | ||
13035 | case O_constant: | |
13036 | case O_register: | |
13037 | break; | |
13038 | ||
43cd72b9 | 13039 | default: |
e7da6241 | 13040 | as_bad (_("expression too complex")); |
43cd72b9 BW |
13041 | break; |
13042 | } | |
13043 | } | |
13044 | } | |
13045 | } | |
13046 | ||
13047 | return has_fixup; | |
13048 | } | |
13049 | ||
13050 | ||
13051 | static void | |
7fa3d080 | 13052 | vinsn_from_chars (vliw_insn *vinsn, char *f) |
43cd72b9 BW |
13053 | { |
13054 | static xtensa_insnbuf insnbuf = NULL; | |
13055 | static xtensa_insnbuf slotbuf = NULL; | |
13056 | int i; | |
13057 | xtensa_format fmt; | |
13058 | xtensa_isa isa = xtensa_default_isa; | |
13059 | ||
13060 | if (!insnbuf) | |
13061 | { | |
13062 | insnbuf = xtensa_insnbuf_alloc (isa); | |
13063 | slotbuf = xtensa_insnbuf_alloc (isa); | |
13064 | } | |
13065 | ||
d77b99c9 | 13066 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) f, 0); |
43cd72b9 BW |
13067 | fmt = xtensa_format_decode (isa, insnbuf); |
13068 | if (fmt == XTENSA_UNDEFINED) | |
13069 | as_fatal (_("cannot decode instruction format")); | |
13070 | vinsn->format = fmt; | |
13071 | vinsn->num_slots = xtensa_format_num_slots (isa, fmt); | |
13072 | ||
13073 | for (i = 0; i < vinsn->num_slots; i++) | |
13074 | { | |
13075 | TInsn *tinsn = &vinsn->slots[i]; | |
13076 | xtensa_format_get_slot (isa, fmt, i, insnbuf, slotbuf); | |
13077 | tinsn_from_insnbuf (tinsn, slotbuf, fmt, i); | |
13078 | } | |
13079 | } | |
13080 | ||
e0001a05 NC |
13081 | \f |
13082 | /* Expression utilities. */ | |
13083 | ||
43cd72b9 | 13084 | /* Return TRUE if the expression is an integer constant. */ |
e0001a05 NC |
13085 | |
13086 | bfd_boolean | |
7fa3d080 | 13087 | expr_is_const (const expressionS *s) |
e0001a05 NC |
13088 | { |
13089 | return (s->X_op == O_constant); | |
13090 | } | |
13091 | ||
13092 | ||
13093 | /* Get the expression constant. | |
43cd72b9 | 13094 | Calling this is illegal if expr_is_const () returns TRUE. */ |
e0001a05 NC |
13095 | |
13096 | offsetT | |
7fa3d080 | 13097 | get_expr_const (const expressionS *s) |
e0001a05 | 13098 | { |
9c2799c2 | 13099 | gas_assert (expr_is_const (s)); |
e0001a05 NC |
13100 | return s->X_add_number; |
13101 | } | |
13102 | ||
13103 | ||
13104 | /* Set the expression to a constant value. */ | |
13105 | ||
13106 | void | |
7fa3d080 | 13107 | set_expr_const (expressionS *s, offsetT val) |
e0001a05 NC |
13108 | { |
13109 | s->X_op = O_constant; | |
13110 | s->X_add_number = val; | |
13111 | s->X_add_symbol = NULL; | |
13112 | s->X_op_symbol = NULL; | |
13113 | } | |
13114 | ||
13115 | ||
43cd72b9 | 13116 | bfd_boolean |
7fa3d080 | 13117 | expr_is_register (const expressionS *s) |
43cd72b9 BW |
13118 | { |
13119 | return (s->X_op == O_register); | |
13120 | } | |
13121 | ||
13122 | ||
13123 | /* Get the expression constant. | |
13124 | Calling this is illegal if expr_is_const () returns TRUE. */ | |
13125 | ||
13126 | offsetT | |
7fa3d080 | 13127 | get_expr_register (const expressionS *s) |
43cd72b9 | 13128 | { |
9c2799c2 | 13129 | gas_assert (expr_is_register (s)); |
43cd72b9 BW |
13130 | return s->X_add_number; |
13131 | } | |
13132 | ||
13133 | ||
e0001a05 NC |
13134 | /* Set the expression to a symbol + constant offset. */ |
13135 | ||
13136 | void | |
7fa3d080 | 13137 | set_expr_symbol_offset (expressionS *s, symbolS *sym, offsetT offset) |
e0001a05 NC |
13138 | { |
13139 | s->X_op = O_symbol; | |
13140 | s->X_add_symbol = sym; | |
13141 | s->X_op_symbol = NULL; /* unused */ | |
13142 | s->X_add_number = offset; | |
13143 | } | |
13144 | ||
13145 | ||
43cd72b9 BW |
13146 | /* Return TRUE if the two expressions are equal. */ |
13147 | ||
e0001a05 | 13148 | bfd_boolean |
7fa3d080 | 13149 | expr_is_equal (expressionS *s1, expressionS *s2) |
e0001a05 NC |
13150 | { |
13151 | if (s1->X_op != s2->X_op) | |
13152 | return FALSE; | |
13153 | if (s1->X_add_symbol != s2->X_add_symbol) | |
13154 | return FALSE; | |
13155 | if (s1->X_op_symbol != s2->X_op_symbol) | |
13156 | return FALSE; | |
13157 | if (s1->X_add_number != s2->X_add_number) | |
13158 | return FALSE; | |
13159 | return TRUE; | |
13160 | } | |
13161 | ||
13162 | ||
13163 | static void | |
7fa3d080 | 13164 | copy_expr (expressionS *dst, const expressionS *src) |
e0001a05 NC |
13165 | { |
13166 | memcpy (dst, src, sizeof (expressionS)); | |
13167 | } | |
13168 | ||
13169 | \f | |
9456465c | 13170 | /* Support for the "--rename-section" option. */ |
e0001a05 NC |
13171 | |
13172 | struct rename_section_struct | |
13173 | { | |
e4a0c708 | 13174 | const char *old_name; |
e0001a05 NC |
13175 | char *new_name; |
13176 | struct rename_section_struct *next; | |
13177 | }; | |
13178 | ||
13179 | static struct rename_section_struct *section_rename; | |
13180 | ||
13181 | ||
9456465c BW |
13182 | /* Parse the string "oldname=new_name(:oldname2=new_name2)*" and add |
13183 | entries to the section_rename list. Note: Specifying multiple | |
13184 | renamings separated by colons is not documented and is retained only | |
13185 | for backward compatibility. */ | |
e0001a05 | 13186 | |
7fa3d080 BW |
13187 | static void |
13188 | build_section_rename (const char *arg) | |
e0001a05 | 13189 | { |
9456465c | 13190 | struct rename_section_struct *r; |
e0001a05 NC |
13191 | char *this_arg = NULL; |
13192 | char *next_arg = NULL; | |
13193 | ||
9456465c | 13194 | for (this_arg = xstrdup (arg); this_arg != NULL; this_arg = next_arg) |
e0001a05 | 13195 | { |
9456465c BW |
13196 | char *old_name, *new_name; |
13197 | ||
e0001a05 NC |
13198 | if (this_arg) |
13199 | { | |
13200 | next_arg = strchr (this_arg, ':'); | |
13201 | if (next_arg) | |
13202 | { | |
13203 | *next_arg = '\0'; | |
13204 | next_arg++; | |
13205 | } | |
13206 | } | |
e0001a05 | 13207 | |
9456465c BW |
13208 | old_name = this_arg; |
13209 | new_name = strchr (this_arg, '='); | |
e0001a05 | 13210 | |
9456465c BW |
13211 | if (*old_name == '\0') |
13212 | { | |
13213 | as_warn (_("ignoring extra '-rename-section' delimiter ':'")); | |
13214 | continue; | |
13215 | } | |
13216 | if (!new_name || new_name[1] == '\0') | |
13217 | { | |
13218 | as_warn (_("ignoring invalid '-rename-section' specification: '%s'"), | |
13219 | old_name); | |
13220 | continue; | |
13221 | } | |
13222 | *new_name = '\0'; | |
13223 | new_name++; | |
e0001a05 | 13224 | |
9456465c BW |
13225 | /* Check for invalid section renaming. */ |
13226 | for (r = section_rename; r != NULL; r = r->next) | |
13227 | { | |
13228 | if (strcmp (r->old_name, old_name) == 0) | |
13229 | as_bad (_("section %s renamed multiple times"), old_name); | |
13230 | if (strcmp (r->new_name, new_name) == 0) | |
13231 | as_bad (_("multiple sections remapped to output section %s"), | |
13232 | new_name); | |
13233 | } | |
e0001a05 | 13234 | |
9456465c | 13235 | /* Now add it. */ |
325801bd | 13236 | r = XNEW (struct rename_section_struct); |
9456465c BW |
13237 | r->old_name = xstrdup (old_name); |
13238 | r->new_name = xstrdup (new_name); | |
13239 | r->next = section_rename; | |
13240 | section_rename = r; | |
e0001a05 | 13241 | } |
e0001a05 NC |
13242 | } |
13243 | ||
13244 | ||
9456465c | 13245 | char * |
e4a0c708 | 13246 | xtensa_section_rename (const char *name) |
e0001a05 NC |
13247 | { |
13248 | struct rename_section_struct *r = section_rename; | |
13249 | ||
13250 | for (r = section_rename; r != NULL; r = r->next) | |
43cd72b9 BW |
13251 | { |
13252 | if (strcmp (r->old_name, name) == 0) | |
13253 | return r->new_name; | |
13254 | } | |
e0001a05 | 13255 | |
e4a0c708 | 13256 | return (char *) name; |
e0001a05 | 13257 | } |