Commit | Line | Data |
---|---|---|
e0001a05 | 1 | /* tc-xtensa.c -- Assemble Xtensa instructions. |
aa820537 AM |
2 | Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
3 | Free Software Foundation, Inc. | |
e0001a05 NC |
4 | |
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
e0001a05 NC |
10 | any later version. |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to | |
4b4da160 NC |
19 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
e0001a05 | 21 | |
43cd72b9 | 22 | #include <limits.h> |
e0001a05 NC |
23 | #include "as.h" |
24 | #include "sb.h" | |
25 | #include "safe-ctype.h" | |
26 | #include "tc-xtensa.h" | |
e0001a05 NC |
27 | #include "subsegs.h" |
28 | #include "xtensa-relax.h" | |
cda2eb9e | 29 | #include "dwarf2dbg.h" |
b224e962 | 30 | #include "xtensa-istack.h" |
e0001a05 NC |
31 | #include "struc-symbol.h" |
32 | #include "xtensa-config.h" | |
33 | ||
2caa7ca0 BW |
34 | /* Provide default values for new configuration settings. */ |
35 | #ifndef XSHAL_ABI | |
36 | #define XSHAL_ABI 0 | |
37 | #endif | |
38 | ||
e0001a05 NC |
39 | #ifndef uint32 |
40 | #define uint32 unsigned int | |
41 | #endif | |
42 | #ifndef int32 | |
43 | #define int32 signed int | |
44 | #endif | |
45 | ||
46 | /* Notes: | |
47 | ||
e0001a05 NC |
48 | Naming conventions (used somewhat inconsistently): |
49 | The xtensa_ functions are exported | |
50 | The xg_ functions are internal | |
51 | ||
52 | We also have a couple of different extensibility mechanisms. | |
53 | 1) The idiom replacement: | |
54 | This is used when a line is first parsed to | |
55 | replace an instruction pattern with another instruction | |
56 | It is currently limited to replacements of instructions | |
57 | with constant operands. | |
58 | 2) The xtensa-relax.c mechanism that has stronger instruction | |
59 | replacement patterns. When an instruction's immediate field | |
60 | does not fit the next instruction sequence is attempted. | |
61 | In addition, "narrow" opcodes are supported this way. */ | |
62 | ||
63 | ||
64 | /* Define characters with special meanings to GAS. */ | |
65 | const char comment_chars[] = "#"; | |
66 | const char line_comment_chars[] = "#"; | |
67 | const char line_separator_chars[] = ";"; | |
68 | const char EXP_CHARS[] = "eE"; | |
69 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
70 | ||
71 | ||
43cd72b9 BW |
72 | /* Flags to indicate whether the hardware supports the density and |
73 | absolute literals options. */ | |
e0001a05 | 74 | |
e0001a05 | 75 | bfd_boolean density_supported = XCHAL_HAVE_DENSITY; |
43cd72b9 BW |
76 | bfd_boolean absolute_literals_supported = XSHAL_USE_ABSOLUTE_LITERALS; |
77 | ||
78 | /* Maximum width we would pad an unreachable frag to get alignment. */ | |
79 | #define UNREACHABLE_MAX_WIDTH 8 | |
e0001a05 | 80 | |
43cd72b9 BW |
81 | static vliw_insn cur_vinsn; |
82 | ||
77cba8a3 | 83 | unsigned xtensa_num_pipe_stages; |
d77b99c9 | 84 | unsigned xtensa_fetch_width = XCHAL_INST_FETCH_WIDTH; |
43cd72b9 BW |
85 | |
86 | static enum debug_info_type xt_saved_debug_type = DEBUG_NONE; | |
87 | ||
88 | /* Some functions are only valid in the front end. This variable | |
c138bc38 | 89 | allows us to assert that we haven't crossed over into the |
43cd72b9 BW |
90 | back end. */ |
91 | static bfd_boolean past_xtensa_end = FALSE; | |
e0001a05 NC |
92 | |
93 | /* Flags for properties of the last instruction in a segment. */ | |
94 | #define FLAG_IS_A0_WRITER 0x1 | |
95 | #define FLAG_IS_BAD_LOOPEND 0x2 | |
96 | ||
97 | ||
98 | /* We define a special segment names ".literal" to place literals | |
99 | into. The .fini and .init sections are special because they | |
100 | contain code that is moved together by the linker. We give them | |
101 | their own special .fini.literal and .init.literal sections. */ | |
102 | ||
103 | #define LITERAL_SECTION_NAME xtensa_section_rename (".literal") | |
43cd72b9 | 104 | #define LIT4_SECTION_NAME xtensa_section_rename (".lit4") |
e0001a05 | 105 | #define INIT_SECTION_NAME xtensa_section_rename (".init") |
74869ac7 | 106 | #define FINI_SECTION_NAME xtensa_section_rename (".fini") |
e0001a05 NC |
107 | |
108 | ||
43cd72b9 | 109 | /* This type is used for the directive_stack to keep track of the |
74869ac7 BW |
110 | state of the literal collection pools. If lit_prefix is set, it is |
111 | used to determine the literal section names; otherwise, the literal | |
112 | sections are determined based on the current text section. The | |
113 | lit_seg and lit4_seg fields cache these literal sections, with the | |
114 | current_text_seg field used a tag to indicate whether the cached | |
115 | values are valid. */ | |
e0001a05 NC |
116 | |
117 | typedef struct lit_state_struct | |
118 | { | |
74869ac7 BW |
119 | char *lit_prefix; |
120 | segT current_text_seg; | |
e0001a05 | 121 | segT lit_seg; |
43cd72b9 | 122 | segT lit4_seg; |
e0001a05 NC |
123 | } lit_state; |
124 | ||
125 | static lit_state default_lit_sections; | |
126 | ||
127 | ||
74869ac7 BW |
128 | /* We keep a list of literal segments. The seg_list type is the node |
129 | for this list. The literal_head pointer is the head of the list, | |
130 | with the literal_head_h dummy node at the start. */ | |
e0001a05 NC |
131 | |
132 | typedef struct seg_list_struct | |
133 | { | |
134 | struct seg_list_struct *next; | |
135 | segT seg; | |
136 | } seg_list; | |
137 | ||
138 | static seg_list literal_head_h; | |
139 | static seg_list *literal_head = &literal_head_h; | |
e0001a05 NC |
140 | |
141 | ||
82e7541d BW |
142 | /* Lists of symbols. We keep a list of symbols that label the current |
143 | instruction, so that we can adjust the symbols when inserting alignment | |
144 | for various instructions. We also keep a list of all the symbols on | |
145 | literals, so that we can fix up those symbols when the literals are | |
146 | later moved into the text sections. */ | |
147 | ||
148 | typedef struct sym_list_struct | |
149 | { | |
150 | struct sym_list_struct *next; | |
151 | symbolS *sym; | |
152 | } sym_list; | |
153 | ||
154 | static sym_list *insn_labels = NULL; | |
155 | static sym_list *free_insn_labels = NULL; | |
156 | static sym_list *saved_insn_labels = NULL; | |
157 | ||
158 | static sym_list *literal_syms; | |
159 | ||
160 | ||
43cd72b9 BW |
161 | /* Flags to determine whether to prefer const16 or l32r |
162 | if both options are available. */ | |
163 | int prefer_const16 = 0; | |
164 | int prefer_l32r = 0; | |
165 | ||
e0001a05 NC |
166 | /* Global flag to indicate when we are emitting literals. */ |
167 | int generating_literals = 0; | |
168 | ||
43cd72b9 BW |
169 | /* The following PROPERTY table definitions are copied from |
170 | <elf/xtensa.h> and must be kept in sync with the code there. */ | |
171 | ||
172 | /* Flags in the property tables to specify whether blocks of memory | |
173 | are literals, instructions, data, or unreachable. For | |
174 | instructions, blocks that begin loop targets and branch targets are | |
175 | designated. Blocks that do not allow density, instruction | |
176 | reordering or transformation are also specified. Finally, for | |
177 | branch targets, branch target alignment priority is included. | |
178 | Alignment of the next block is specified in the current block | |
179 | and the size of the current block does not include any fill required | |
180 | to align to the next block. */ | |
181 | ||
182 | #define XTENSA_PROP_LITERAL 0x00000001 | |
183 | #define XTENSA_PROP_INSN 0x00000002 | |
184 | #define XTENSA_PROP_DATA 0x00000004 | |
185 | #define XTENSA_PROP_UNREACHABLE 0x00000008 | |
186 | /* Instruction only properties at beginning of code. */ | |
187 | #define XTENSA_PROP_INSN_LOOP_TARGET 0x00000010 | |
188 | #define XTENSA_PROP_INSN_BRANCH_TARGET 0x00000020 | |
189 | /* Instruction only properties about code. */ | |
190 | #define XTENSA_PROP_INSN_NO_DENSITY 0x00000040 | |
191 | #define XTENSA_PROP_INSN_NO_REORDER 0x00000080 | |
99ded152 BW |
192 | /* Historically, NO_TRANSFORM was a property of instructions, |
193 | but it should apply to literals under certain circumstances. */ | |
194 | #define XTENSA_PROP_NO_TRANSFORM 0x00000100 | |
43cd72b9 BW |
195 | |
196 | /* Branch target alignment information. This transmits information | |
197 | to the linker optimization about the priority of aligning a | |
198 | particular block for branch target alignment: None, low priority, | |
199 | high priority, or required. These only need to be checked in | |
200 | instruction blocks marked as XTENSA_PROP_INSN_BRANCH_TARGET. | |
201 | Common usage is | |
202 | ||
203 | switch (GET_XTENSA_PROP_BT_ALIGN (flags)) | |
204 | case XTENSA_PROP_BT_ALIGN_NONE: | |
205 | case XTENSA_PROP_BT_ALIGN_LOW: | |
206 | case XTENSA_PROP_BT_ALIGN_HIGH: | |
207 | case XTENSA_PROP_BT_ALIGN_REQUIRE: | |
208 | */ | |
209 | #define XTENSA_PROP_BT_ALIGN_MASK 0x00000600 | |
210 | ||
211 | /* No branch target alignment. */ | |
212 | #define XTENSA_PROP_BT_ALIGN_NONE 0x0 | |
213 | /* Low priority branch target alignment. */ | |
214 | #define XTENSA_PROP_BT_ALIGN_LOW 0x1 | |
215 | /* High priority branch target alignment. */ | |
216 | #define XTENSA_PROP_BT_ALIGN_HIGH 0x2 | |
217 | /* Required branch target alignment. */ | |
218 | #define XTENSA_PROP_BT_ALIGN_REQUIRE 0x3 | |
219 | ||
220 | #define GET_XTENSA_PROP_BT_ALIGN(flag) \ | |
221 | (((unsigned) ((flag) & (XTENSA_PROP_BT_ALIGN_MASK))) >> 9) | |
222 | #define SET_XTENSA_PROP_BT_ALIGN(flag, align) \ | |
223 | (((flag) & (~XTENSA_PROP_BT_ALIGN_MASK)) | \ | |
224 | (((align) << 9) & XTENSA_PROP_BT_ALIGN_MASK)) | |
225 | ||
226 | ||
227 | /* Alignment is specified in the block BEFORE the one that needs | |
228 | alignment. Up to 5 bits. Use GET_XTENSA_PROP_ALIGNMENT(flags) to | |
229 | get the required alignment specified as a power of 2. Use | |
230 | SET_XTENSA_PROP_ALIGNMENT(flags, pow2) to set the required | |
231 | alignment. Be careful of side effects since the SET will evaluate | |
232 | flags twice. Also, note that the SIZE of a block in the property | |
233 | table does not include the alignment size, so the alignment fill | |
234 | must be calculated to determine if two blocks are contiguous. | |
235 | TEXT_ALIGN is not currently implemented but is a placeholder for a | |
236 | possible future implementation. */ | |
237 | ||
238 | #define XTENSA_PROP_ALIGN 0x00000800 | |
239 | ||
240 | #define XTENSA_PROP_ALIGNMENT_MASK 0x0001f000 | |
241 | ||
242 | #define GET_XTENSA_PROP_ALIGNMENT(flag) \ | |
243 | (((unsigned) ((flag) & (XTENSA_PROP_ALIGNMENT_MASK))) >> 12) | |
244 | #define SET_XTENSA_PROP_ALIGNMENT(flag, align) \ | |
245 | (((flag) & (~XTENSA_PROP_ALIGNMENT_MASK)) | \ | |
246 | (((align) << 12) & XTENSA_PROP_ALIGNMENT_MASK)) | |
247 | ||
248 | #define XTENSA_PROP_INSN_ABSLIT 0x00020000 | |
249 | ||
250 | ||
251 | /* Structure for saving instruction and alignment per-fragment data | |
252 | that will be written to the object file. This structure is | |
253 | equivalent to the actual data that will be written out to the file | |
254 | but is easier to use. We provide a conversion to file flags | |
255 | in frag_flags_to_number. */ | |
256 | ||
257 | typedef struct frag_flags_struct frag_flags; | |
258 | ||
259 | struct frag_flags_struct | |
260 | { | |
261 | /* is_literal should only be used after xtensa_move_literals. | |
262 | If you need to check if you are generating a literal fragment, | |
263 | then use the generating_literals global. */ | |
264 | ||
265 | unsigned is_literal : 1; | |
266 | unsigned is_insn : 1; | |
267 | unsigned is_data : 1; | |
268 | unsigned is_unreachable : 1; | |
269 | ||
99ded152 BW |
270 | /* is_specific_opcode implies no_transform. */ |
271 | unsigned is_no_transform : 1; | |
272 | ||
43cd72b9 BW |
273 | struct |
274 | { | |
275 | unsigned is_loop_target : 1; | |
276 | unsigned is_branch_target : 1; /* Branch targets have a priority. */ | |
277 | unsigned bt_align_priority : 2; | |
278 | ||
279 | unsigned is_no_density : 1; | |
280 | /* no_longcalls flag does not need to be placed in the object file. */ | |
43cd72b9 BW |
281 | |
282 | unsigned is_no_reorder : 1; | |
283 | ||
284 | /* Uses absolute literal addressing for l32r. */ | |
285 | unsigned is_abslit : 1; | |
286 | } insn; | |
287 | unsigned is_align : 1; | |
288 | unsigned alignment : 5; | |
289 | }; | |
290 | ||
291 | ||
292 | /* Structure for saving information about a block of property data | |
293 | for frags that have the same flags. */ | |
294 | struct xtensa_block_info_struct | |
295 | { | |
296 | segT sec; | |
297 | bfd_vma offset; | |
298 | size_t size; | |
299 | frag_flags flags; | |
300 | struct xtensa_block_info_struct *next; | |
301 | }; | |
302 | ||
e0001a05 NC |
303 | |
304 | /* Structure for saving the current state before emitting literals. */ | |
305 | typedef struct emit_state_struct | |
306 | { | |
307 | const char *name; | |
308 | segT now_seg; | |
309 | subsegT now_subseg; | |
310 | int generating_literals; | |
311 | } emit_state; | |
312 | ||
313 | ||
43cd72b9 BW |
314 | /* Opcode placement information */ |
315 | ||
316 | typedef unsigned long long bitfield; | |
317 | #define bit_is_set(bit, bf) ((bf) & (0x01ll << (bit))) | |
318 | #define set_bit(bit, bf) ((bf) |= (0x01ll << (bit))) | |
319 | #define clear_bit(bit, bf) ((bf) &= ~(0x01ll << (bit))) | |
320 | ||
321 | #define MAX_FORMATS 32 | |
322 | ||
323 | typedef struct op_placement_info_struct | |
324 | { | |
325 | int num_formats; | |
326 | /* A number describing how restrictive the issue is for this | |
327 | opcode. For example, an opcode that fits lots of different | |
c138bc38 | 328 | formats has a high freedom, as does an opcode that fits |
43cd72b9 | 329 | only one format but many slots in that format. The most |
c138bc38 | 330 | restrictive is the opcode that fits only one slot in one |
43cd72b9 BW |
331 | format. */ |
332 | int issuef; | |
43cd72b9 | 333 | xtensa_format narrowest; |
43cd72b9 | 334 | char narrowest_size; |
b2d179be | 335 | char narrowest_slot; |
43cd72b9 BW |
336 | |
337 | /* formats is a bitfield with the Nth bit set | |
338 | if the opcode fits in the Nth xtensa_format. */ | |
339 | bitfield formats; | |
340 | ||
341 | /* slots[N]'s Mth bit is set if the op fits in the | |
342 | Mth slot of the Nth xtensa_format. */ | |
343 | bitfield slots[MAX_FORMATS]; | |
344 | ||
345 | /* A count of the number of slots in a given format | |
346 | an op can fit (i.e., the bitcount of the slot field above). */ | |
347 | char slots_in_format[MAX_FORMATS]; | |
348 | ||
349 | } op_placement_info, *op_placement_info_table; | |
350 | ||
351 | op_placement_info_table op_placement_table; | |
352 | ||
353 | ||
354 | /* Extra expression types. */ | |
355 | ||
356 | #define O_pltrel O_md1 /* like O_symbol but use a PLT reloc */ | |
357 | #define O_hi16 O_md2 /* use high 16 bits of symbolic value */ | |
358 | #define O_lo16 O_md3 /* use low 16 bits of symbolic value */ | |
1bbb5f21 | 359 | #define O_pcrel O_md4 /* value is a PC-relative offset */ |
28dbbc02 BW |
360 | #define O_tlsfunc O_md5 /* TLS_FUNC/TLSDESC_FN relocation */ |
361 | #define O_tlsarg O_md6 /* TLS_ARG/TLSDESC_ARG relocation */ | |
362 | #define O_tlscall O_md7 /* TLS_CALL relocation */ | |
363 | #define O_tpoff O_md8 /* TPOFF relocation */ | |
364 | #define O_dtpoff O_md9 /* DTPOFF relocation */ | |
43cd72b9 | 365 | |
bbdd25a8 BW |
366 | struct suffix_reloc_map |
367 | { | |
368 | char *suffix; | |
369 | int length; | |
370 | bfd_reloc_code_real_type reloc; | |
371 | unsigned char operator; | |
372 | }; | |
373 | ||
374 | #define SUFFIX_MAP(str, reloc, op) { str, sizeof (str) - 1, reloc, op } | |
375 | ||
376 | static struct suffix_reloc_map suffix_relocs[] = | |
377 | { | |
378 | SUFFIX_MAP ("l", BFD_RELOC_LO16, O_lo16), | |
379 | SUFFIX_MAP ("h", BFD_RELOC_HI16, O_hi16), | |
380 | SUFFIX_MAP ("plt", BFD_RELOC_XTENSA_PLT, O_pltrel), | |
1bbb5f21 | 381 | SUFFIX_MAP ("pcrel", BFD_RELOC_32_PCREL, O_pcrel), |
28dbbc02 BW |
382 | SUFFIX_MAP ("tlsfunc", BFD_RELOC_XTENSA_TLS_FUNC, O_tlsfunc), |
383 | SUFFIX_MAP ("tlsarg", BFD_RELOC_XTENSA_TLS_ARG, O_tlsarg), | |
384 | SUFFIX_MAP ("tlscall", BFD_RELOC_XTENSA_TLS_CALL, O_tlscall), | |
385 | SUFFIX_MAP ("tpoff", BFD_RELOC_XTENSA_TLS_TPOFF, O_tpoff), | |
386 | SUFFIX_MAP ("dtpoff", BFD_RELOC_XTENSA_TLS_DTPOFF, O_dtpoff), | |
bbdd25a8 BW |
387 | { (char *) 0, 0, BFD_RELOC_UNUSED, 0 } |
388 | }; | |
389 | ||
43cd72b9 | 390 | |
e0001a05 NC |
391 | /* Directives. */ |
392 | ||
393 | typedef enum | |
394 | { | |
395 | directive_none = 0, | |
396 | directive_literal, | |
397 | directive_density, | |
43cd72b9 | 398 | directive_transform, |
e0001a05 NC |
399 | directive_freeregs, |
400 | directive_longcalls, | |
43cd72b9 BW |
401 | directive_literal_prefix, |
402 | directive_schedule, | |
403 | directive_absolute_literals, | |
404 | directive_last_directive | |
e0001a05 NC |
405 | } directiveE; |
406 | ||
407 | typedef struct | |
408 | { | |
409 | const char *name; | |
410 | bfd_boolean can_be_negated; | |
411 | } directive_infoS; | |
412 | ||
413 | const directive_infoS directive_info[] = | |
414 | { | |
43cd72b9 BW |
415 | { "none", FALSE }, |
416 | { "literal", FALSE }, | |
417 | { "density", TRUE }, | |
418 | { "transform", TRUE }, | |
419 | { "freeregs", FALSE }, | |
420 | { "longcalls", TRUE }, | |
421 | { "literal_prefix", FALSE }, | |
422 | { "schedule", TRUE }, | |
423 | { "absolute-literals", TRUE } | |
e0001a05 NC |
424 | }; |
425 | ||
426 | bfd_boolean directive_state[] = | |
427 | { | |
428 | FALSE, /* none */ | |
429 | FALSE, /* literal */ | |
43cd72b9 | 430 | #if !XCHAL_HAVE_DENSITY |
e0001a05 NC |
431 | FALSE, /* density */ |
432 | #else | |
433 | TRUE, /* density */ | |
434 | #endif | |
43cd72b9 | 435 | TRUE, /* transform */ |
e0001a05 NC |
436 | FALSE, /* freeregs */ |
437 | FALSE, /* longcalls */ | |
43cd72b9 | 438 | FALSE, /* literal_prefix */ |
2caa7ca0 | 439 | FALSE, /* schedule */ |
43cd72b9 BW |
440 | #if XSHAL_USE_ABSOLUTE_LITERALS |
441 | TRUE /* absolute_literals */ | |
442 | #else | |
443 | FALSE /* absolute_literals */ | |
444 | #endif | |
e0001a05 NC |
445 | }; |
446 | ||
e0001a05 NC |
447 | |
448 | /* Directive functions. */ | |
449 | ||
7fa3d080 BW |
450 | static void xtensa_begin_directive (int); |
451 | static void xtensa_end_directive (int); | |
74869ac7 | 452 | static void xtensa_literal_prefix (void); |
7fa3d080 BW |
453 | static void xtensa_literal_position (int); |
454 | static void xtensa_literal_pseudo (int); | |
455 | static void xtensa_frequency_pseudo (int); | |
456 | static void xtensa_elf_cons (int); | |
fb227da0 | 457 | static void xtensa_leb128 (int); |
e0001a05 | 458 | |
7fa3d080 | 459 | /* Parsing and Idiom Translation. */ |
e0001a05 | 460 | |
7fa3d080 | 461 | static bfd_reloc_code_real_type xtensa_elf_suffix (char **, expressionS *); |
e0001a05 | 462 | |
e0001a05 NC |
463 | /* Various Other Internal Functions. */ |
464 | ||
84b08ed9 BW |
465 | extern bfd_boolean xg_is_single_relaxable_insn (TInsn *, TInsn *, bfd_boolean); |
466 | static bfd_boolean xg_build_to_insn (TInsn *, TInsn *, BuildInstr *); | |
7fa3d080 BW |
467 | static void xtensa_mark_literal_pool_location (void); |
468 | static addressT get_expanded_loop_offset (xtensa_opcode); | |
469 | static fragS *get_literal_pool_location (segT); | |
470 | static void set_literal_pool_location (segT, fragS *); | |
471 | static void xtensa_set_frag_assembly_state (fragS *); | |
472 | static void finish_vinsn (vliw_insn *); | |
473 | static bfd_boolean emit_single_op (TInsn *); | |
34e41783 | 474 | static int total_frag_text_expansion (fragS *); |
e0001a05 NC |
475 | |
476 | /* Alignment Functions. */ | |
477 | ||
d77b99c9 BW |
478 | static int get_text_align_power (unsigned); |
479 | static int get_text_align_max_fill_size (int, bfd_boolean, bfd_boolean); | |
664df4e4 | 480 | static int branch_align_power (segT); |
e0001a05 NC |
481 | |
482 | /* Helpers for xtensa_relax_frag(). */ | |
483 | ||
7fa3d080 | 484 | static long relax_frag_add_nop (fragS *); |
e0001a05 | 485 | |
b08b5071 | 486 | /* Accessors for additional per-subsegment information. */ |
e0001a05 | 487 | |
7fa3d080 BW |
488 | static unsigned get_last_insn_flags (segT, subsegT); |
489 | static void set_last_insn_flags (segT, subsegT, unsigned, bfd_boolean); | |
b08b5071 BW |
490 | static float get_subseg_total_freq (segT, subsegT); |
491 | static float get_subseg_target_freq (segT, subsegT); | |
492 | static void set_subseg_freq (segT, subsegT, float, float); | |
e0001a05 NC |
493 | |
494 | /* Segment list functions. */ | |
495 | ||
7fa3d080 BW |
496 | static void xtensa_move_literals (void); |
497 | static void xtensa_reorder_segments (void); | |
498 | static void xtensa_switch_to_literal_fragment (emit_state *); | |
499 | static void xtensa_switch_to_non_abs_literal_fragment (emit_state *); | |
500 | static void xtensa_switch_section_emit_state (emit_state *, segT, subsegT); | |
501 | static void xtensa_restore_emit_state (emit_state *); | |
74869ac7 | 502 | static segT cache_literal_section (bfd_boolean); |
e0001a05 | 503 | |
e0001a05 | 504 | /* Import from elf32-xtensa.c in BFD library. */ |
43cd72b9 | 505 | |
51c8ebc1 | 506 | extern asection *xtensa_make_property_section (asection *, const char *); |
e0001a05 | 507 | |
43cd72b9 BW |
508 | /* op_placement_info functions. */ |
509 | ||
7fa3d080 BW |
510 | static void init_op_placement_info_table (void); |
511 | extern bfd_boolean opcode_fits_format_slot (xtensa_opcode, xtensa_format, int); | |
512 | static int xg_get_single_size (xtensa_opcode); | |
513 | static xtensa_format xg_get_single_format (xtensa_opcode); | |
b2d179be | 514 | static int xg_get_single_slot (xtensa_opcode); |
43cd72b9 | 515 | |
e0001a05 | 516 | /* TInsn and IStack functions. */ |
43cd72b9 | 517 | |
7fa3d080 BW |
518 | static bfd_boolean tinsn_has_symbolic_operands (const TInsn *); |
519 | static bfd_boolean tinsn_has_invalid_symbolic_operands (const TInsn *); | |
520 | static bfd_boolean tinsn_has_complex_operands (const TInsn *); | |
521 | static bfd_boolean tinsn_to_insnbuf (TInsn *, xtensa_insnbuf); | |
522 | static bfd_boolean tinsn_check_arguments (const TInsn *); | |
523 | static void tinsn_from_chars (TInsn *, char *, int); | |
524 | static void tinsn_immed_from_frag (TInsn *, fragS *, int); | |
525 | static int get_num_stack_text_bytes (IStack *); | |
526 | static int get_num_stack_literal_bytes (IStack *); | |
e0001a05 | 527 | |
43cd72b9 BW |
528 | /* vliw_insn functions. */ |
529 | ||
7fa3d080 | 530 | static void xg_init_vinsn (vliw_insn *); |
d8392fd9 | 531 | static void xg_copy_vinsn (vliw_insn *, vliw_insn *); |
7fa3d080 BW |
532 | static void xg_clear_vinsn (vliw_insn *); |
533 | static bfd_boolean vinsn_has_specific_opcodes (vliw_insn *); | |
534 | static void xg_free_vinsn (vliw_insn *); | |
43cd72b9 | 535 | static bfd_boolean vinsn_to_insnbuf |
7fa3d080 BW |
536 | (vliw_insn *, char *, fragS *, bfd_boolean); |
537 | static void vinsn_from_chars (vliw_insn *, char *); | |
43cd72b9 | 538 | |
e0001a05 | 539 | /* Expression Utilities. */ |
43cd72b9 | 540 | |
7fa3d080 BW |
541 | bfd_boolean expr_is_const (const expressionS *); |
542 | offsetT get_expr_const (const expressionS *); | |
543 | void set_expr_const (expressionS *, offsetT); | |
544 | bfd_boolean expr_is_register (const expressionS *); | |
545 | offsetT get_expr_register (const expressionS *); | |
546 | void set_expr_symbol_offset (expressionS *, symbolS *, offsetT); | |
7fa3d080 BW |
547 | bfd_boolean expr_is_equal (expressionS *, expressionS *); |
548 | static void copy_expr (expressionS *, const expressionS *); | |
e0001a05 | 549 | |
9456465c BW |
550 | /* Section renaming. */ |
551 | ||
7fa3d080 | 552 | static void build_section_rename (const char *); |
e0001a05 | 553 | |
e0001a05 NC |
554 | |
555 | /* ISA imported from bfd. */ | |
556 | extern xtensa_isa xtensa_default_isa; | |
557 | ||
558 | extern int target_big_endian; | |
559 | ||
560 | static xtensa_opcode xtensa_addi_opcode; | |
561 | static xtensa_opcode xtensa_addmi_opcode; | |
562 | static xtensa_opcode xtensa_call0_opcode; | |
563 | static xtensa_opcode xtensa_call4_opcode; | |
564 | static xtensa_opcode xtensa_call8_opcode; | |
565 | static xtensa_opcode xtensa_call12_opcode; | |
566 | static xtensa_opcode xtensa_callx0_opcode; | |
567 | static xtensa_opcode xtensa_callx4_opcode; | |
568 | static xtensa_opcode xtensa_callx8_opcode; | |
569 | static xtensa_opcode xtensa_callx12_opcode; | |
43cd72b9 | 570 | static xtensa_opcode xtensa_const16_opcode; |
e0001a05 | 571 | static xtensa_opcode xtensa_entry_opcode; |
d12f9798 | 572 | static xtensa_opcode xtensa_extui_opcode; |
43cd72b9 BW |
573 | static xtensa_opcode xtensa_movi_opcode; |
574 | static xtensa_opcode xtensa_movi_n_opcode; | |
e0001a05 | 575 | static xtensa_opcode xtensa_isync_opcode; |
19e8f41a | 576 | static xtensa_opcode xtensa_j_opcode; |
e0001a05 | 577 | static xtensa_opcode xtensa_jx_opcode; |
43cd72b9 | 578 | static xtensa_opcode xtensa_l32r_opcode; |
e0001a05 NC |
579 | static xtensa_opcode xtensa_loop_opcode; |
580 | static xtensa_opcode xtensa_loopnez_opcode; | |
581 | static xtensa_opcode xtensa_loopgtz_opcode; | |
43cd72b9 | 582 | static xtensa_opcode xtensa_nop_opcode; |
e0001a05 NC |
583 | static xtensa_opcode xtensa_nop_n_opcode; |
584 | static xtensa_opcode xtensa_or_opcode; | |
585 | static xtensa_opcode xtensa_ret_opcode; | |
586 | static xtensa_opcode xtensa_ret_n_opcode; | |
587 | static xtensa_opcode xtensa_retw_opcode; | |
588 | static xtensa_opcode xtensa_retw_n_opcode; | |
43cd72b9 | 589 | static xtensa_opcode xtensa_rsr_lcount_opcode; |
e0001a05 | 590 | static xtensa_opcode xtensa_waiti_opcode; |
62af60e2 | 591 | static int config_max_slots = 0; |
e0001a05 NC |
592 | |
593 | \f | |
594 | /* Command-line Options. */ | |
595 | ||
596 | bfd_boolean use_literal_section = TRUE; | |
19fc3723 | 597 | enum flix_level produce_flix = FLIX_ALL; |
e0001a05 | 598 | static bfd_boolean align_targets = TRUE; |
43cd72b9 | 599 | static bfd_boolean warn_unaligned_branch_targets = FALSE; |
e0001a05 | 600 | static bfd_boolean has_a0_b_retw = FALSE; |
43cd72b9 BW |
601 | static bfd_boolean workaround_a0_b_retw = FALSE; |
602 | static bfd_boolean workaround_b_j_loop_end = FALSE; | |
603 | static bfd_boolean workaround_short_loop = FALSE; | |
e0001a05 | 604 | static bfd_boolean maybe_has_short_loop = FALSE; |
43cd72b9 | 605 | static bfd_boolean workaround_close_loop_end = FALSE; |
e0001a05 | 606 | static bfd_boolean maybe_has_close_loop_end = FALSE; |
03aaa593 | 607 | static bfd_boolean enforce_three_byte_loop_align = FALSE; |
e0001a05 | 608 | |
43cd72b9 BW |
609 | /* When workaround_short_loops is TRUE, all loops with early exits must |
610 | have at least 3 instructions. workaround_all_short_loops is a modifier | |
611 | to the workaround_short_loop flag. In addition to the | |
612 | workaround_short_loop actions, all straightline loopgtz and loopnez | |
613 | must have at least 3 instructions. */ | |
e0001a05 | 614 | |
43cd72b9 | 615 | static bfd_boolean workaround_all_short_loops = FALSE; |
e0001a05 | 616 | |
7fa3d080 BW |
617 | |
618 | static void | |
619 | xtensa_setup_hw_workarounds (int earliest, int latest) | |
620 | { | |
621 | if (earliest > latest) | |
622 | as_fatal (_("illegal range of target hardware versions")); | |
623 | ||
624 | /* Enable all workarounds for pre-T1050.0 hardware. */ | |
625 | if (earliest < 105000 || latest < 105000) | |
626 | { | |
627 | workaround_a0_b_retw |= TRUE; | |
628 | workaround_b_j_loop_end |= TRUE; | |
629 | workaround_short_loop |= TRUE; | |
630 | workaround_close_loop_end |= TRUE; | |
631 | workaround_all_short_loops |= TRUE; | |
03aaa593 | 632 | enforce_three_byte_loop_align = TRUE; |
7fa3d080 BW |
633 | } |
634 | } | |
635 | ||
636 | ||
e0001a05 NC |
637 | enum |
638 | { | |
639 | option_density = OPTION_MD_BASE, | |
640 | option_no_density, | |
641 | ||
19fc3723 SA |
642 | option_flix, |
643 | option_no_generate_flix, | |
644 | option_no_flix, | |
645 | ||
e0001a05 NC |
646 | option_relax, |
647 | option_no_relax, | |
648 | ||
43cd72b9 BW |
649 | option_link_relax, |
650 | option_no_link_relax, | |
651 | ||
e0001a05 NC |
652 | option_generics, |
653 | option_no_generics, | |
654 | ||
43cd72b9 BW |
655 | option_transform, |
656 | option_no_transform, | |
657 | ||
e0001a05 NC |
658 | option_text_section_literals, |
659 | option_no_text_section_literals, | |
660 | ||
43cd72b9 BW |
661 | option_absolute_literals, |
662 | option_no_absolute_literals, | |
663 | ||
e0001a05 NC |
664 | option_align_targets, |
665 | option_no_align_targets, | |
666 | ||
43cd72b9 | 667 | option_warn_unaligned_targets, |
e0001a05 NC |
668 | |
669 | option_longcalls, | |
670 | option_no_longcalls, | |
671 | ||
672 | option_workaround_a0_b_retw, | |
673 | option_no_workaround_a0_b_retw, | |
674 | ||
675 | option_workaround_b_j_loop_end, | |
676 | option_no_workaround_b_j_loop_end, | |
677 | ||
678 | option_workaround_short_loop, | |
679 | option_no_workaround_short_loop, | |
680 | ||
681 | option_workaround_all_short_loops, | |
682 | option_no_workaround_all_short_loops, | |
683 | ||
684 | option_workaround_close_loop_end, | |
685 | option_no_workaround_close_loop_end, | |
686 | ||
687 | option_no_workarounds, | |
688 | ||
e0001a05 | 689 | option_rename_section_name, |
e0001a05 | 690 | |
43cd72b9 BW |
691 | option_prefer_l32r, |
692 | option_prefer_const16, | |
693 | ||
694 | option_target_hardware | |
e0001a05 NC |
695 | }; |
696 | ||
697 | const char *md_shortopts = ""; | |
698 | ||
699 | struct option md_longopts[] = | |
700 | { | |
43cd72b9 BW |
701 | { "density", no_argument, NULL, option_density }, |
702 | { "no-density", no_argument, NULL, option_no_density }, | |
703 | ||
19fc3723 SA |
704 | { "flix", no_argument, NULL, option_flix }, |
705 | { "no-generate-flix", no_argument, NULL, option_no_generate_flix }, | |
706 | { "no-allow-flix", no_argument, NULL, option_no_flix }, | |
707 | ||
43cd72b9 BW |
708 | /* Both "relax" and "generics" are deprecated and treated as equivalent |
709 | to the "transform" option. */ | |
710 | { "relax", no_argument, NULL, option_relax }, | |
711 | { "no-relax", no_argument, NULL, option_no_relax }, | |
712 | { "generics", no_argument, NULL, option_generics }, | |
713 | { "no-generics", no_argument, NULL, option_no_generics }, | |
714 | ||
715 | { "transform", no_argument, NULL, option_transform }, | |
716 | { "no-transform", no_argument, NULL, option_no_transform }, | |
717 | { "text-section-literals", no_argument, NULL, option_text_section_literals }, | |
718 | { "no-text-section-literals", no_argument, NULL, | |
719 | option_no_text_section_literals }, | |
720 | { "absolute-literals", no_argument, NULL, option_absolute_literals }, | |
721 | { "no-absolute-literals", no_argument, NULL, option_no_absolute_literals }, | |
e0001a05 NC |
722 | /* This option was changed from -align-target to -target-align |
723 | because it conflicted with the "-al" option. */ | |
43cd72b9 | 724 | { "target-align", no_argument, NULL, option_align_targets }, |
7fa3d080 BW |
725 | { "no-target-align", no_argument, NULL, option_no_align_targets }, |
726 | { "warn-unaligned-targets", no_argument, NULL, | |
727 | option_warn_unaligned_targets }, | |
43cd72b9 BW |
728 | { "longcalls", no_argument, NULL, option_longcalls }, |
729 | { "no-longcalls", no_argument, NULL, option_no_longcalls }, | |
730 | ||
731 | { "no-workaround-a0-b-retw", no_argument, NULL, | |
732 | option_no_workaround_a0_b_retw }, | |
733 | { "workaround-a0-b-retw", no_argument, NULL, option_workaround_a0_b_retw }, | |
e0001a05 | 734 | |
43cd72b9 BW |
735 | { "no-workaround-b-j-loop-end", no_argument, NULL, |
736 | option_no_workaround_b_j_loop_end }, | |
737 | { "workaround-b-j-loop-end", no_argument, NULL, | |
738 | option_workaround_b_j_loop_end }, | |
e0001a05 | 739 | |
43cd72b9 BW |
740 | { "no-workaround-short-loops", no_argument, NULL, |
741 | option_no_workaround_short_loop }, | |
7fa3d080 BW |
742 | { "workaround-short-loops", no_argument, NULL, |
743 | option_workaround_short_loop }, | |
e0001a05 | 744 | |
43cd72b9 BW |
745 | { "no-workaround-all-short-loops", no_argument, NULL, |
746 | option_no_workaround_all_short_loops }, | |
747 | { "workaround-all-short-loop", no_argument, NULL, | |
748 | option_workaround_all_short_loops }, | |
749 | ||
750 | { "prefer-l32r", no_argument, NULL, option_prefer_l32r }, | |
751 | { "prefer-const16", no_argument, NULL, option_prefer_const16 }, | |
752 | ||
753 | { "no-workarounds", no_argument, NULL, option_no_workarounds }, | |
754 | ||
755 | { "no-workaround-close-loop-end", no_argument, NULL, | |
756 | option_no_workaround_close_loop_end }, | |
757 | { "workaround-close-loop-end", no_argument, NULL, | |
758 | option_workaround_close_loop_end }, | |
e0001a05 | 759 | |
7fa3d080 | 760 | { "rename-section", required_argument, NULL, option_rename_section_name }, |
e0001a05 | 761 | |
43cd72b9 BW |
762 | { "link-relax", no_argument, NULL, option_link_relax }, |
763 | { "no-link-relax", no_argument, NULL, option_no_link_relax }, | |
764 | ||
765 | { "target-hardware", required_argument, NULL, option_target_hardware }, | |
766 | ||
767 | { NULL, no_argument, NULL, 0 } | |
e0001a05 NC |
768 | }; |
769 | ||
770 | size_t md_longopts_size = sizeof md_longopts; | |
771 | ||
772 | ||
773 | int | |
7fa3d080 | 774 | md_parse_option (int c, char *arg) |
e0001a05 NC |
775 | { |
776 | switch (c) | |
777 | { | |
778 | case option_density: | |
43cd72b9 | 779 | as_warn (_("--density option is ignored")); |
e0001a05 NC |
780 | return 1; |
781 | case option_no_density: | |
43cd72b9 | 782 | as_warn (_("--no-density option is ignored")); |
e0001a05 | 783 | return 1; |
43cd72b9 BW |
784 | case option_link_relax: |
785 | linkrelax = 1; | |
e0001a05 | 786 | return 1; |
43cd72b9 BW |
787 | case option_no_link_relax: |
788 | linkrelax = 0; | |
e0001a05 | 789 | return 1; |
19fc3723 SA |
790 | case option_flix: |
791 | produce_flix = FLIX_ALL; | |
792 | return 1; | |
793 | case option_no_generate_flix: | |
794 | produce_flix = FLIX_NO_GENERATE; | |
795 | return 1; | |
796 | case option_no_flix: | |
797 | produce_flix = FLIX_NONE; | |
798 | return 1; | |
43cd72b9 BW |
799 | case option_generics: |
800 | as_warn (_("--generics is deprecated; use --transform instead")); | |
801 | return md_parse_option (option_transform, arg); | |
802 | case option_no_generics: | |
803 | as_warn (_("--no-generics is deprecated; use --no-transform instead")); | |
804 | return md_parse_option (option_no_transform, arg); | |
805 | case option_relax: | |
806 | as_warn (_("--relax is deprecated; use --transform instead")); | |
807 | return md_parse_option (option_transform, arg); | |
808 | case option_no_relax: | |
809 | as_warn (_("--no-relax is deprecated; use --no-transform instead")); | |
810 | return md_parse_option (option_no_transform, arg); | |
e0001a05 NC |
811 | case option_longcalls: |
812 | directive_state[directive_longcalls] = TRUE; | |
813 | return 1; | |
814 | case option_no_longcalls: | |
815 | directive_state[directive_longcalls] = FALSE; | |
816 | return 1; | |
817 | case option_text_section_literals: | |
818 | use_literal_section = FALSE; | |
819 | return 1; | |
820 | case option_no_text_section_literals: | |
821 | use_literal_section = TRUE; | |
822 | return 1; | |
43cd72b9 BW |
823 | case option_absolute_literals: |
824 | if (!absolute_literals_supported) | |
825 | { | |
826 | as_fatal (_("--absolute-literals option not supported in this Xtensa configuration")); | |
827 | return 0; | |
828 | } | |
829 | directive_state[directive_absolute_literals] = TRUE; | |
830 | return 1; | |
831 | case option_no_absolute_literals: | |
832 | directive_state[directive_absolute_literals] = FALSE; | |
833 | return 1; | |
834 | ||
e0001a05 NC |
835 | case option_workaround_a0_b_retw: |
836 | workaround_a0_b_retw = TRUE; | |
e0001a05 NC |
837 | return 1; |
838 | case option_no_workaround_a0_b_retw: | |
839 | workaround_a0_b_retw = FALSE; | |
e0001a05 NC |
840 | return 1; |
841 | case option_workaround_b_j_loop_end: | |
842 | workaround_b_j_loop_end = TRUE; | |
e0001a05 NC |
843 | return 1; |
844 | case option_no_workaround_b_j_loop_end: | |
845 | workaround_b_j_loop_end = FALSE; | |
e0001a05 NC |
846 | return 1; |
847 | ||
848 | case option_workaround_short_loop: | |
849 | workaround_short_loop = TRUE; | |
e0001a05 NC |
850 | return 1; |
851 | case option_no_workaround_short_loop: | |
852 | workaround_short_loop = FALSE; | |
e0001a05 NC |
853 | return 1; |
854 | ||
855 | case option_workaround_all_short_loops: | |
856 | workaround_all_short_loops = TRUE; | |
e0001a05 NC |
857 | return 1; |
858 | case option_no_workaround_all_short_loops: | |
859 | workaround_all_short_loops = FALSE; | |
e0001a05 NC |
860 | return 1; |
861 | ||
862 | case option_workaround_close_loop_end: | |
863 | workaround_close_loop_end = TRUE; | |
e0001a05 NC |
864 | return 1; |
865 | case option_no_workaround_close_loop_end: | |
866 | workaround_close_loop_end = FALSE; | |
e0001a05 NC |
867 | return 1; |
868 | ||
869 | case option_no_workarounds: | |
870 | workaround_a0_b_retw = FALSE; | |
e0001a05 | 871 | workaround_b_j_loop_end = FALSE; |
e0001a05 | 872 | workaround_short_loop = FALSE; |
e0001a05 | 873 | workaround_all_short_loops = FALSE; |
e0001a05 | 874 | workaround_close_loop_end = FALSE; |
e0001a05 | 875 | return 1; |
43cd72b9 | 876 | |
e0001a05 NC |
877 | case option_align_targets: |
878 | align_targets = TRUE; | |
879 | return 1; | |
880 | case option_no_align_targets: | |
881 | align_targets = FALSE; | |
882 | return 1; | |
883 | ||
43cd72b9 BW |
884 | case option_warn_unaligned_targets: |
885 | warn_unaligned_branch_targets = TRUE; | |
e0001a05 NC |
886 | return 1; |
887 | ||
e0001a05 NC |
888 | case option_rename_section_name: |
889 | build_section_rename (arg); | |
890 | return 1; | |
e0001a05 NC |
891 | |
892 | case 'Q': | |
893 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
894 | should be emitted or not. FIXME: Not implemented. */ | |
895 | return 1; | |
c138bc38 | 896 | |
43cd72b9 BW |
897 | case option_prefer_l32r: |
898 | if (prefer_const16) | |
899 | as_fatal (_("prefer-l32r conflicts with prefer-const16")); | |
900 | prefer_l32r = 1; | |
901 | return 1; | |
902 | ||
903 | case option_prefer_const16: | |
904 | if (prefer_l32r) | |
905 | as_fatal (_("prefer-const16 conflicts with prefer-l32r")); | |
906 | prefer_const16 = 1; | |
907 | return 1; | |
908 | ||
c138bc38 | 909 | case option_target_hardware: |
43cd72b9 BW |
910 | { |
911 | int earliest, latest = 0; | |
912 | if (*arg == 0 || *arg == '-') | |
913 | as_fatal (_("invalid target hardware version")); | |
914 | ||
915 | earliest = strtol (arg, &arg, 0); | |
916 | ||
917 | if (*arg == 0) | |
918 | latest = earliest; | |
919 | else if (*arg == '-') | |
920 | { | |
921 | if (*++arg == 0) | |
922 | as_fatal (_("invalid target hardware version")); | |
923 | latest = strtol (arg, &arg, 0); | |
924 | } | |
925 | if (*arg != 0) | |
926 | as_fatal (_("invalid target hardware version")); | |
927 | ||
928 | xtensa_setup_hw_workarounds (earliest, latest); | |
929 | return 1; | |
930 | } | |
931 | ||
932 | case option_transform: | |
933 | /* This option has no affect other than to use the defaults, | |
934 | which are already set. */ | |
935 | return 1; | |
936 | ||
937 | case option_no_transform: | |
938 | /* This option turns off all transformations of any kind. | |
939 | However, because we want to preserve the state of other | |
940 | directives, we only change its own field. Thus, before | |
941 | you perform any transformation, always check if transform | |
942 | is available. If you use the functions we provide for this | |
943 | purpose, you will be ok. */ | |
944 | directive_state[directive_transform] = FALSE; | |
945 | return 1; | |
946 | ||
e0001a05 NC |
947 | default: |
948 | return 0; | |
949 | } | |
950 | } | |
951 | ||
952 | ||
953 | void | |
7fa3d080 | 954 | md_show_usage (FILE *stream) |
e0001a05 | 955 | { |
43cd72b9 BW |
956 | fputs ("\n\ |
957 | Xtensa options:\n\ | |
9456465c BW |
958 | --[no-]text-section-literals\n\ |
959 | [Do not] put literals in the text section\n\ | |
960 | --[no-]absolute-literals\n\ | |
961 | [Do not] default to use non-PC-relative literals\n\ | |
962 | --[no-]target-align [Do not] try to align branch targets\n\ | |
963 | --[no-]longcalls [Do not] emit 32-bit call sequences\n\ | |
964 | --[no-]transform [Do not] transform instructions\n\ | |
19fc3723 SA |
965 | --flix both allow hand-written and generate flix bundles\n\ |
966 | --no-generate-flix allow hand-written but do not generate\n\ | |
967 | flix bundles\n\ | |
968 | --no-allow-flix neither allow hand-written nor generate\n\ | |
969 | flix bundles\n\ | |
9456465c | 970 | --rename-section old=new Rename section 'old' to 'new'\n", stream); |
e0001a05 NC |
971 | } |
972 | ||
7fa3d080 BW |
973 | \f |
974 | /* Functions related to the list of current label symbols. */ | |
43cd72b9 BW |
975 | |
976 | static void | |
7fa3d080 | 977 | xtensa_add_insn_label (symbolS *sym) |
43cd72b9 | 978 | { |
7fa3d080 | 979 | sym_list *l; |
43cd72b9 | 980 | |
7fa3d080 BW |
981 | if (!free_insn_labels) |
982 | l = (sym_list *) xmalloc (sizeof (sym_list)); | |
983 | else | |
43cd72b9 | 984 | { |
7fa3d080 BW |
985 | l = free_insn_labels; |
986 | free_insn_labels = l->next; | |
987 | } | |
988 | ||
989 | l->sym = sym; | |
990 | l->next = insn_labels; | |
991 | insn_labels = l; | |
992 | } | |
993 | ||
994 | ||
995 | static void | |
996 | xtensa_clear_insn_labels (void) | |
997 | { | |
998 | sym_list **pl; | |
999 | ||
1000 | for (pl = &free_insn_labels; *pl != NULL; pl = &(*pl)->next) | |
1001 | ; | |
1002 | *pl = insn_labels; | |
1003 | insn_labels = NULL; | |
1004 | } | |
1005 | ||
1006 | ||
7fa3d080 | 1007 | static void |
c3ea6048 | 1008 | xtensa_move_labels (fragS *new_frag, valueT new_offset) |
7fa3d080 BW |
1009 | { |
1010 | sym_list *lit; | |
1011 | ||
1012 | for (lit = insn_labels; lit; lit = lit->next) | |
1013 | { | |
1014 | symbolS *lit_sym = lit->sym; | |
c3ea6048 BW |
1015 | S_SET_VALUE (lit_sym, new_offset); |
1016 | symbol_set_frag (lit_sym, new_frag); | |
43cd72b9 BW |
1017 | } |
1018 | } | |
1019 | ||
e0001a05 NC |
1020 | \f |
1021 | /* Directive data and functions. */ | |
1022 | ||
1023 | typedef struct state_stackS_struct | |
1024 | { | |
1025 | directiveE directive; | |
1026 | bfd_boolean negated; | |
1027 | bfd_boolean old_state; | |
1028 | const char *file; | |
1029 | unsigned int line; | |
1030 | const void *datum; | |
1031 | struct state_stackS_struct *prev; | |
1032 | } state_stackS; | |
1033 | ||
1034 | state_stackS *directive_state_stack; | |
1035 | ||
1036 | const pseudo_typeS md_pseudo_table[] = | |
1037 | { | |
43cd72b9 BW |
1038 | { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */ |
1039 | { "literal_position", xtensa_literal_position, 0 }, | |
1040 | { "frame", s_ignore, 0 }, /* Formerly used for STABS debugging. */ | |
1041 | { "long", xtensa_elf_cons, 4 }, | |
1042 | { "word", xtensa_elf_cons, 4 }, | |
1bbb5f21 | 1043 | { "4byte", xtensa_elf_cons, 4 }, |
43cd72b9 | 1044 | { "short", xtensa_elf_cons, 2 }, |
1bbb5f21 | 1045 | { "2byte", xtensa_elf_cons, 2 }, |
fb227da0 BW |
1046 | { "sleb128", xtensa_leb128, 1}, |
1047 | { "uleb128", xtensa_leb128, 0}, | |
43cd72b9 BW |
1048 | { "begin", xtensa_begin_directive, 0 }, |
1049 | { "end", xtensa_end_directive, 0 }, | |
43cd72b9 BW |
1050 | { "literal", xtensa_literal_pseudo, 0 }, |
1051 | { "frequency", xtensa_frequency_pseudo, 0 }, | |
1052 | { NULL, 0, 0 }, | |
e0001a05 NC |
1053 | }; |
1054 | ||
1055 | ||
7fa3d080 BW |
1056 | static bfd_boolean |
1057 | use_transform (void) | |
e0001a05 | 1058 | { |
43cd72b9 BW |
1059 | /* After md_end, you should be checking frag by frag, rather |
1060 | than state directives. */ | |
9c2799c2 | 1061 | gas_assert (!past_xtensa_end); |
43cd72b9 | 1062 | return directive_state[directive_transform]; |
e0001a05 NC |
1063 | } |
1064 | ||
1065 | ||
7fa3d080 BW |
1066 | static bfd_boolean |
1067 | do_align_targets (void) | |
e0001a05 | 1068 | { |
7b1cc377 BW |
1069 | /* Do not use this function after md_end; just look at align_targets |
1070 | instead. There is no target-align directive, so alignment is either | |
1071 | enabled for all frags or not done at all. */ | |
9c2799c2 | 1072 | gas_assert (!past_xtensa_end); |
43cd72b9 | 1073 | return align_targets && use_transform (); |
e0001a05 NC |
1074 | } |
1075 | ||
1076 | ||
1077 | static void | |
7fa3d080 | 1078 | directive_push (directiveE directive, bfd_boolean negated, const void *datum) |
e0001a05 NC |
1079 | { |
1080 | char *file; | |
1081 | unsigned int line; | |
1082 | state_stackS *stack = (state_stackS *) xmalloc (sizeof (state_stackS)); | |
1083 | ||
1084 | as_where (&file, &line); | |
1085 | ||
1086 | stack->directive = directive; | |
1087 | stack->negated = negated; | |
1088 | stack->old_state = directive_state[directive]; | |
1089 | stack->file = file; | |
1090 | stack->line = line; | |
1091 | stack->datum = datum; | |
1092 | stack->prev = directive_state_stack; | |
1093 | directive_state_stack = stack; | |
1094 | ||
1095 | directive_state[directive] = !negated; | |
1096 | } | |
1097 | ||
7fa3d080 | 1098 | |
e0001a05 | 1099 | static void |
7fa3d080 BW |
1100 | directive_pop (directiveE *directive, |
1101 | bfd_boolean *negated, | |
1102 | const char **file, | |
1103 | unsigned int *line, | |
1104 | const void **datum) | |
e0001a05 NC |
1105 | { |
1106 | state_stackS *top = directive_state_stack; | |
1107 | ||
1108 | if (!directive_state_stack) | |
1109 | { | |
1110 | as_bad (_("unmatched end directive")); | |
1111 | *directive = directive_none; | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | directive_state[directive_state_stack->directive] = top->old_state; | |
1116 | *directive = top->directive; | |
1117 | *negated = top->negated; | |
1118 | *file = top->file; | |
1119 | *line = top->line; | |
1120 | *datum = top->datum; | |
1121 | directive_state_stack = top->prev; | |
1122 | free (top); | |
1123 | } | |
1124 | ||
1125 | ||
1126 | static void | |
7fa3d080 | 1127 | directive_balance (void) |
e0001a05 NC |
1128 | { |
1129 | while (directive_state_stack) | |
1130 | { | |
1131 | directiveE directive; | |
1132 | bfd_boolean negated; | |
1133 | const char *file; | |
1134 | unsigned int line; | |
1135 | const void *datum; | |
1136 | ||
1137 | directive_pop (&directive, &negated, &file, &line, &datum); | |
1138 | as_warn_where ((char *) file, line, | |
1139 | _(".begin directive with no matching .end directive")); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | ||
1144 | static bfd_boolean | |
7fa3d080 | 1145 | inside_directive (directiveE dir) |
e0001a05 NC |
1146 | { |
1147 | state_stackS *top = directive_state_stack; | |
1148 | ||
1149 | while (top && top->directive != dir) | |
1150 | top = top->prev; | |
1151 | ||
1152 | return (top != NULL); | |
1153 | } | |
1154 | ||
1155 | ||
1156 | static void | |
7fa3d080 | 1157 | get_directive (directiveE *directive, bfd_boolean *negated) |
e0001a05 NC |
1158 | { |
1159 | int len; | |
1160 | unsigned i; | |
43cd72b9 | 1161 | char *directive_string; |
e0001a05 NC |
1162 | |
1163 | if (strncmp (input_line_pointer, "no-", 3) != 0) | |
1164 | *negated = FALSE; | |
1165 | else | |
1166 | { | |
1167 | *negated = TRUE; | |
1168 | input_line_pointer += 3; | |
1169 | } | |
1170 | ||
1171 | len = strspn (input_line_pointer, | |
43cd72b9 BW |
1172 | "abcdefghijklmnopqrstuvwxyz_-/0123456789."); |
1173 | ||
1174 | /* This code is a hack to make .begin [no-][generics|relax] exactly | |
1175 | equivalent to .begin [no-]transform. We should remove it when | |
1176 | we stop accepting those options. */ | |
c138bc38 | 1177 | |
43cd72b9 BW |
1178 | if (strncmp (input_line_pointer, "generics", strlen ("generics")) == 0) |
1179 | { | |
1180 | as_warn (_("[no-]generics is deprecated; use [no-]transform instead")); | |
1181 | directive_string = "transform"; | |
1182 | } | |
1183 | else if (strncmp (input_line_pointer, "relax", strlen ("relax")) == 0) | |
1184 | { | |
1185 | as_warn (_("[no-]relax is deprecated; use [no-]transform instead")); | |
1186 | directive_string = "transform"; | |
c138bc38 | 1187 | } |
43cd72b9 BW |
1188 | else |
1189 | directive_string = input_line_pointer; | |
e0001a05 NC |
1190 | |
1191 | for (i = 0; i < sizeof (directive_info) / sizeof (*directive_info); ++i) | |
1192 | { | |
43cd72b9 | 1193 | if (strncmp (directive_string, directive_info[i].name, len) == 0) |
e0001a05 NC |
1194 | { |
1195 | input_line_pointer += len; | |
1196 | *directive = (directiveE) i; | |
1197 | if (*negated && !directive_info[i].can_be_negated) | |
43cd72b9 | 1198 | as_bad (_("directive %s cannot be negated"), |
e0001a05 NC |
1199 | directive_info[i].name); |
1200 | return; | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | as_bad (_("unknown directive")); | |
1205 | *directive = (directiveE) XTENSA_UNDEFINED; | |
1206 | } | |
1207 | ||
1208 | ||
1209 | static void | |
7fa3d080 | 1210 | xtensa_begin_directive (int ignore ATTRIBUTE_UNUSED) |
e0001a05 NC |
1211 | { |
1212 | directiveE directive; | |
1213 | bfd_boolean negated; | |
1214 | emit_state *state; | |
e0001a05 NC |
1215 | lit_state *ls; |
1216 | ||
1217 | get_directive (&directive, &negated); | |
1218 | if (directive == (directiveE) XTENSA_UNDEFINED) | |
1219 | { | |
1220 | discard_rest_of_line (); | |
1221 | return; | |
1222 | } | |
1223 | ||
43cd72b9 BW |
1224 | if (cur_vinsn.inside_bundle) |
1225 | as_bad (_("directives are not valid inside bundles")); | |
1226 | ||
e0001a05 NC |
1227 | switch (directive) |
1228 | { | |
1229 | case directive_literal: | |
82e7541d BW |
1230 | if (!inside_directive (directive_literal)) |
1231 | { | |
1232 | /* Previous labels go with whatever follows this directive, not with | |
1233 | the literal, so save them now. */ | |
1234 | saved_insn_labels = insn_labels; | |
1235 | insn_labels = NULL; | |
1236 | } | |
43cd72b9 | 1237 | as_warn (_(".begin literal is deprecated; use .literal instead")); |
e0001a05 NC |
1238 | state = (emit_state *) xmalloc (sizeof (emit_state)); |
1239 | xtensa_switch_to_literal_fragment (state); | |
1240 | directive_push (directive_literal, negated, state); | |
1241 | break; | |
1242 | ||
1243 | case directive_literal_prefix: | |
c138bc38 | 1244 | /* Have to flush pending output because a movi relaxed to an l32r |
43cd72b9 BW |
1245 | might produce a literal. */ |
1246 | md_flush_pending_output (); | |
e0001a05 NC |
1247 | /* Check to see if the current fragment is a literal |
1248 | fragment. If it is, then this operation is not allowed. */ | |
43cd72b9 | 1249 | if (generating_literals) |
e0001a05 NC |
1250 | { |
1251 | as_bad (_("cannot set literal_prefix inside literal fragment")); | |
1252 | return; | |
1253 | } | |
1254 | ||
1255 | /* Allocate the literal state for this section and push | |
1256 | onto the directive stack. */ | |
1257 | ls = xmalloc (sizeof (lit_state)); | |
9c2799c2 | 1258 | gas_assert (ls); |
e0001a05 NC |
1259 | |
1260 | *ls = default_lit_sections; | |
e0001a05 NC |
1261 | directive_push (directive_literal_prefix, negated, ls); |
1262 | ||
e0001a05 | 1263 | /* Process the new prefix. */ |
74869ac7 | 1264 | xtensa_literal_prefix (); |
e0001a05 NC |
1265 | break; |
1266 | ||
1267 | case directive_freeregs: | |
1268 | /* This information is currently unused, but we'll accept the statement | |
1269 | and just discard the rest of the line. This won't check the syntax, | |
1270 | but it will accept every correct freeregs directive. */ | |
1271 | input_line_pointer += strcspn (input_line_pointer, "\n"); | |
1272 | directive_push (directive_freeregs, negated, 0); | |
1273 | break; | |
1274 | ||
43cd72b9 BW |
1275 | case directive_schedule: |
1276 | md_flush_pending_output (); | |
1277 | frag_var (rs_fill, 0, 0, frag_now->fr_subtype, | |
1278 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
1279 | directive_push (directive_schedule, negated, 0); | |
1280 | xtensa_set_frag_assembly_state (frag_now); | |
1281 | break; | |
1282 | ||
e0001a05 | 1283 | case directive_density: |
43cd72b9 BW |
1284 | as_warn (_(".begin [no-]density is ignored")); |
1285 | break; | |
1286 | ||
1287 | case directive_absolute_literals: | |
1288 | md_flush_pending_output (); | |
1289 | if (!absolute_literals_supported && !negated) | |
e0001a05 | 1290 | { |
43cd72b9 | 1291 | as_warn (_("Xtensa absolute literals option not supported; ignored")); |
e0001a05 NC |
1292 | break; |
1293 | } | |
43cd72b9 BW |
1294 | xtensa_set_frag_assembly_state (frag_now); |
1295 | directive_push (directive, negated, 0); | |
1296 | break; | |
e0001a05 NC |
1297 | |
1298 | default: | |
43cd72b9 BW |
1299 | md_flush_pending_output (); |
1300 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
1301 | directive_push (directive, negated, 0); |
1302 | break; | |
1303 | } | |
1304 | ||
1305 | demand_empty_rest_of_line (); | |
1306 | } | |
1307 | ||
1308 | ||
1309 | static void | |
7fa3d080 | 1310 | xtensa_end_directive (int ignore ATTRIBUTE_UNUSED) |
e0001a05 NC |
1311 | { |
1312 | directiveE begin_directive, end_directive; | |
1313 | bfd_boolean begin_negated, end_negated; | |
1314 | const char *file; | |
1315 | unsigned int line; | |
1316 | emit_state *state; | |
43cd72b9 | 1317 | emit_state **state_ptr; |
e0001a05 NC |
1318 | lit_state *s; |
1319 | ||
43cd72b9 BW |
1320 | if (cur_vinsn.inside_bundle) |
1321 | as_bad (_("directives are not valid inside bundles")); | |
82e7541d | 1322 | |
e0001a05 | 1323 | get_directive (&end_directive, &end_negated); |
43cd72b9 BW |
1324 | |
1325 | md_flush_pending_output (); | |
1326 | ||
1327 | switch (end_directive) | |
e0001a05 | 1328 | { |
43cd72b9 | 1329 | case (directiveE) XTENSA_UNDEFINED: |
e0001a05 NC |
1330 | discard_rest_of_line (); |
1331 | return; | |
e0001a05 | 1332 | |
43cd72b9 BW |
1333 | case directive_density: |
1334 | as_warn (_(".end [no-]density is ignored")); | |
e0001a05 | 1335 | demand_empty_rest_of_line (); |
43cd72b9 BW |
1336 | break; |
1337 | ||
1338 | case directive_absolute_literals: | |
1339 | if (!absolute_literals_supported && !end_negated) | |
1340 | { | |
1341 | as_warn (_("Xtensa absolute literals option not supported; ignored")); | |
1342 | demand_empty_rest_of_line (); | |
1343 | return; | |
1344 | } | |
1345 | break; | |
1346 | ||
1347 | default: | |
1348 | break; | |
e0001a05 NC |
1349 | } |
1350 | ||
43cd72b9 | 1351 | state_ptr = &state; /* use state_ptr to avoid type-punning warning */ |
e0001a05 | 1352 | directive_pop (&begin_directive, &begin_negated, &file, &line, |
43cd72b9 | 1353 | (const void **) state_ptr); |
e0001a05 NC |
1354 | |
1355 | if (begin_directive != directive_none) | |
1356 | { | |
1357 | if (begin_directive != end_directive || begin_negated != end_negated) | |
1358 | { | |
1359 | as_bad (_("does not match begin %s%s at %s:%d"), | |
1360 | begin_negated ? "no-" : "", | |
1361 | directive_info[begin_directive].name, file, line); | |
1362 | } | |
1363 | else | |
1364 | { | |
1365 | switch (end_directive) | |
1366 | { | |
1367 | case directive_literal: | |
1368 | frag_var (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
1369 | xtensa_restore_emit_state (state); | |
43cd72b9 | 1370 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 1371 | free (state); |
82e7541d BW |
1372 | if (!inside_directive (directive_literal)) |
1373 | { | |
1374 | /* Restore the list of current labels. */ | |
1375 | xtensa_clear_insn_labels (); | |
1376 | insn_labels = saved_insn_labels; | |
1377 | } | |
e0001a05 NC |
1378 | break; |
1379 | ||
e0001a05 NC |
1380 | case directive_literal_prefix: |
1381 | /* Restore the default collection sections from saved state. */ | |
1382 | s = (lit_state *) state; | |
9c2799c2 | 1383 | gas_assert (s); |
e8247da7 | 1384 | default_lit_sections = *s; |
e0001a05 | 1385 | |
74869ac7 BW |
1386 | /* Free the state storage. */ |
1387 | free (s->lit_prefix); | |
e0001a05 NC |
1388 | free (s); |
1389 | break; | |
1390 | ||
43cd72b9 BW |
1391 | case directive_schedule: |
1392 | case directive_freeregs: | |
1393 | break; | |
1394 | ||
e0001a05 | 1395 | default: |
43cd72b9 | 1396 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
1397 | break; |
1398 | } | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | demand_empty_rest_of_line (); | |
1403 | } | |
1404 | ||
1405 | ||
1406 | /* Place an aligned literal fragment at the current location. */ | |
1407 | ||
1408 | static void | |
7fa3d080 | 1409 | xtensa_literal_position (int ignore ATTRIBUTE_UNUSED) |
e0001a05 | 1410 | { |
43cd72b9 BW |
1411 | md_flush_pending_output (); |
1412 | ||
e0001a05 NC |
1413 | if (inside_directive (directive_literal)) |
1414 | as_warn (_(".literal_position inside literal directive; ignoring")); | |
43cd72b9 | 1415 | xtensa_mark_literal_pool_location (); |
e0001a05 NC |
1416 | |
1417 | demand_empty_rest_of_line (); | |
82e7541d | 1418 | xtensa_clear_insn_labels (); |
e0001a05 NC |
1419 | } |
1420 | ||
1421 | ||
43cd72b9 | 1422 | /* Support .literal label, expr, ... */ |
e0001a05 NC |
1423 | |
1424 | static void | |
7fa3d080 | 1425 | xtensa_literal_pseudo (int ignored ATTRIBUTE_UNUSED) |
e0001a05 NC |
1426 | { |
1427 | emit_state state; | |
1745fcba | 1428 | char *p, *base_name; |
e0001a05 | 1429 | char c; |
e0001a05 NC |
1430 | segT dest_seg; |
1431 | ||
82e7541d BW |
1432 | if (inside_directive (directive_literal)) |
1433 | { | |
1434 | as_bad (_(".literal not allowed inside .begin literal region")); | |
1435 | ignore_rest_of_line (); | |
1436 | return; | |
1437 | } | |
1438 | ||
43cd72b9 BW |
1439 | md_flush_pending_output (); |
1440 | ||
82e7541d BW |
1441 | /* Previous labels go with whatever follows this directive, not with |
1442 | the literal, so save them now. */ | |
1443 | saved_insn_labels = insn_labels; | |
1444 | insn_labels = NULL; | |
1445 | ||
e0001a05 NC |
1446 | /* If we are using text-section literals, then this is the right value... */ |
1447 | dest_seg = now_seg; | |
1448 | ||
1449 | base_name = input_line_pointer; | |
1450 | ||
1451 | xtensa_switch_to_literal_fragment (&state); | |
1452 | ||
43cd72b9 | 1453 | /* ...but if we aren't using text-section-literals, then we |
e0001a05 | 1454 | need to put them in the section we just switched to. */ |
43cd72b9 | 1455 | if (use_literal_section || directive_state[directive_absolute_literals]) |
e0001a05 NC |
1456 | dest_seg = now_seg; |
1457 | ||
43cd72b9 BW |
1458 | /* All literals are aligned to four-byte boundaries. */ |
1459 | frag_align (2, 0, 0); | |
1460 | record_alignment (now_seg, 2); | |
e0001a05 NC |
1461 | |
1462 | c = get_symbol_end (); | |
1463 | /* Just after name is now '\0'. */ | |
1464 | p = input_line_pointer; | |
1465 | *p = c; | |
1466 | SKIP_WHITESPACE (); | |
1467 | ||
1468 | if (*input_line_pointer != ',' && *input_line_pointer != ':') | |
1469 | { | |
1470 | as_bad (_("expected comma or colon after symbol name; " | |
1471 | "rest of line ignored")); | |
1472 | ignore_rest_of_line (); | |
1473 | xtensa_restore_emit_state (&state); | |
1474 | return; | |
1475 | } | |
1476 | *p = 0; | |
1477 | ||
e0001a05 | 1478 | colon (base_name); |
e0001a05 | 1479 | |
e0001a05 | 1480 | *p = c; |
43cd72b9 | 1481 | input_line_pointer++; /* skip ',' or ':' */ |
e0001a05 | 1482 | |
43cd72b9 | 1483 | xtensa_elf_cons (4); |
e0001a05 NC |
1484 | |
1485 | xtensa_restore_emit_state (&state); | |
82e7541d BW |
1486 | |
1487 | /* Restore the list of current labels. */ | |
1488 | xtensa_clear_insn_labels (); | |
1489 | insn_labels = saved_insn_labels; | |
e0001a05 NC |
1490 | } |
1491 | ||
1492 | ||
1493 | static void | |
74869ac7 | 1494 | xtensa_literal_prefix (void) |
e0001a05 | 1495 | { |
74869ac7 BW |
1496 | char *name; |
1497 | int len; | |
1498 | ||
1499 | /* Parse the new prefix from the input_line_pointer. */ | |
1500 | SKIP_WHITESPACE (); | |
1501 | len = strspn (input_line_pointer, | |
1502 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
1503 | "abcdefghijklmnopqrstuvwxyz_/0123456789.$"); | |
e0001a05 NC |
1504 | |
1505 | /* Get a null-terminated copy of the name. */ | |
1506 | name = xmalloc (len + 1); | |
9c2799c2 | 1507 | gas_assert (name); |
74869ac7 | 1508 | strncpy (name, input_line_pointer, len); |
e0001a05 NC |
1509 | name[len] = 0; |
1510 | ||
74869ac7 BW |
1511 | /* Skip the name in the input line. */ |
1512 | input_line_pointer += len; | |
43cd72b9 | 1513 | |
74869ac7 | 1514 | default_lit_sections.lit_prefix = name; |
43cd72b9 | 1515 | |
74869ac7 | 1516 | /* Clear cached literal sections, since the prefix has changed. */ |
43cd72b9 BW |
1517 | default_lit_sections.lit_seg = NULL; |
1518 | default_lit_sections.lit4_seg = NULL; | |
43cd72b9 BW |
1519 | } |
1520 | ||
1521 | ||
1522 | /* Support ".frequency branch_target_frequency fall_through_frequency". */ | |
1523 | ||
1524 | static void | |
7fa3d080 | 1525 | xtensa_frequency_pseudo (int ignored ATTRIBUTE_UNUSED) |
43cd72b9 BW |
1526 | { |
1527 | float fall_through_f, target_f; | |
43cd72b9 BW |
1528 | |
1529 | fall_through_f = (float) strtod (input_line_pointer, &input_line_pointer); | |
1530 | if (fall_through_f < 0) | |
1531 | { | |
1532 | as_bad (_("fall through frequency must be greater than 0")); | |
1533 | ignore_rest_of_line (); | |
1534 | return; | |
1535 | } | |
1536 | ||
1537 | target_f = (float) strtod (input_line_pointer, &input_line_pointer); | |
1538 | if (target_f < 0) | |
1539 | { | |
1540 | as_bad (_("branch target frequency must be greater than 0")); | |
1541 | ignore_rest_of_line (); | |
1542 | return; | |
1543 | } | |
1544 | ||
b08b5071 | 1545 | set_subseg_freq (now_seg, now_subseg, target_f + fall_through_f, target_f); |
43cd72b9 BW |
1546 | |
1547 | demand_empty_rest_of_line (); | |
1548 | } | |
1549 | ||
1550 | ||
1551 | /* Like normal .long/.short/.word, except support @plt, etc. | |
1552 | Clobbers input_line_pointer, checks end-of-line. */ | |
1553 | ||
1554 | static void | |
7fa3d080 | 1555 | xtensa_elf_cons (int nbytes) |
43cd72b9 BW |
1556 | { |
1557 | expressionS exp; | |
1558 | bfd_reloc_code_real_type reloc; | |
1559 | ||
1560 | md_flush_pending_output (); | |
1561 | ||
1562 | if (cur_vinsn.inside_bundle) | |
1563 | as_bad (_("directives are not valid inside bundles")); | |
1564 | ||
1565 | if (is_it_end_of_statement ()) | |
1566 | { | |
1567 | demand_empty_rest_of_line (); | |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | do | |
1572 | { | |
1573 | expression (&exp); | |
1574 | if (exp.X_op == O_symbol | |
1575 | && *input_line_pointer == '@' | |
1576 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, &exp)) | |
1577 | != BFD_RELOC_NONE)) | |
1578 | { | |
1579 | reloc_howto_type *reloc_howto = | |
1580 | bfd_reloc_type_lookup (stdoutput, reloc); | |
1581 | ||
1582 | if (reloc == BFD_RELOC_UNUSED || !reloc_howto) | |
1583 | as_bad (_("unsupported relocation")); | |
1584 | else if ((reloc >= BFD_RELOC_XTENSA_SLOT0_OP | |
1585 | && reloc <= BFD_RELOC_XTENSA_SLOT14_OP) | |
1586 | || (reloc >= BFD_RELOC_XTENSA_SLOT0_ALT | |
1587 | && reloc <= BFD_RELOC_XTENSA_SLOT14_ALT)) | |
1588 | as_bad (_("opcode-specific %s relocation used outside " | |
1589 | "an instruction"), reloc_howto->name); | |
1590 | else if (nbytes != (int) bfd_get_reloc_size (reloc_howto)) | |
1591 | as_bad (_("%s relocations do not fit in %d bytes"), | |
1592 | reloc_howto->name, nbytes); | |
28dbbc02 BW |
1593 | else if (reloc == BFD_RELOC_XTENSA_TLS_FUNC |
1594 | || reloc == BFD_RELOC_XTENSA_TLS_ARG | |
1595 | || reloc == BFD_RELOC_XTENSA_TLS_CALL) | |
1596 | as_bad (_("invalid use of %s relocation"), reloc_howto->name); | |
43cd72b9 BW |
1597 | else |
1598 | { | |
1599 | char *p = frag_more ((int) nbytes); | |
1600 | xtensa_set_frag_assembly_state (frag_now); | |
1601 | fix_new_exp (frag_now, p - frag_now->fr_literal, | |
1bbb5f21 | 1602 | nbytes, &exp, reloc_howto->pc_relative, reloc); |
43cd72b9 BW |
1603 | } |
1604 | } | |
1605 | else | |
1f7efbae BW |
1606 | { |
1607 | xtensa_set_frag_assembly_state (frag_now); | |
1608 | emit_expr (&exp, (unsigned int) nbytes); | |
1609 | } | |
43cd72b9 BW |
1610 | } |
1611 | while (*input_line_pointer++ == ','); | |
1612 | ||
1613 | input_line_pointer--; /* Put terminator back into stream. */ | |
1614 | demand_empty_rest_of_line (); | |
1615 | } | |
1616 | ||
fb227da0 BW |
1617 | static bfd_boolean is_leb128_expr; |
1618 | ||
1619 | static void | |
1620 | xtensa_leb128 (int sign) | |
1621 | { | |
1622 | is_leb128_expr = TRUE; | |
1623 | s_leb128 (sign); | |
1624 | is_leb128_expr = FALSE; | |
1625 | } | |
1626 | ||
7fa3d080 BW |
1627 | \f |
1628 | /* Parsing and Idiom Translation. */ | |
43cd72b9 BW |
1629 | |
1630 | /* Parse @plt, etc. and return the desired relocation. */ | |
1631 | static bfd_reloc_code_real_type | |
7fa3d080 | 1632 | xtensa_elf_suffix (char **str_p, expressionS *exp_p) |
43cd72b9 | 1633 | { |
43cd72b9 BW |
1634 | char ident[20]; |
1635 | char *str = *str_p; | |
1636 | char *str2; | |
1637 | int ch; | |
1638 | int len; | |
bbdd25a8 | 1639 | struct suffix_reloc_map *ptr; |
43cd72b9 BW |
1640 | |
1641 | if (*str++ != '@') | |
1642 | return BFD_RELOC_NONE; | |
1643 | ||
1644 | for (ch = *str, str2 = ident; | |
1645 | (str2 < ident + sizeof (ident) - 1 | |
1646 | && (ISALNUM (ch) || ch == '@')); | |
1647 | ch = *++str) | |
1648 | { | |
1649 | *str2++ = (ISLOWER (ch)) ? ch : TOLOWER (ch); | |
1650 | } | |
1651 | ||
1652 | *str2 = '\0'; | |
1653 | len = str2 - ident; | |
1654 | ||
1655 | ch = ident[0]; | |
bbdd25a8 BW |
1656 | for (ptr = &suffix_relocs[0]; ptr->length > 0; ptr++) |
1657 | if (ch == ptr->suffix[0] | |
43cd72b9 | 1658 | && len == ptr->length |
bbdd25a8 | 1659 | && memcmp (ident, ptr->suffix, ptr->length) == 0) |
43cd72b9 BW |
1660 | { |
1661 | /* Now check for "identifier@suffix+constant". */ | |
1662 | if (*str == '-' || *str == '+') | |
1663 | { | |
1664 | char *orig_line = input_line_pointer; | |
1665 | expressionS new_exp; | |
1666 | ||
1667 | input_line_pointer = str; | |
1668 | expression (&new_exp); | |
1669 | if (new_exp.X_op == O_constant) | |
1670 | { | |
1671 | exp_p->X_add_number += new_exp.X_add_number; | |
1672 | str = input_line_pointer; | |
1673 | } | |
1674 | ||
1675 | if (&input_line_pointer != str_p) | |
1676 | input_line_pointer = orig_line; | |
1677 | } | |
1678 | ||
1679 | *str_p = str; | |
1680 | return ptr->reloc; | |
1681 | } | |
1682 | ||
1683 | return BFD_RELOC_UNUSED; | |
e0001a05 NC |
1684 | } |
1685 | ||
e0001a05 | 1686 | |
bbdd25a8 BW |
1687 | /* Find the matching operator type. */ |
1688 | static unsigned char | |
1689 | map_suffix_reloc_to_operator (bfd_reloc_code_real_type reloc) | |
1690 | { | |
1691 | struct suffix_reloc_map *sfx; | |
1692 | unsigned char operator = (unsigned char) -1; | |
1693 | ||
1694 | for (sfx = &suffix_relocs[0]; sfx->suffix; sfx++) | |
1695 | { | |
1696 | if (sfx->reloc == reloc) | |
1697 | { | |
1698 | operator = sfx->operator; | |
1699 | break; | |
1700 | } | |
1701 | } | |
9c2799c2 | 1702 | gas_assert (operator != (unsigned char) -1); |
bbdd25a8 BW |
1703 | return operator; |
1704 | } | |
1705 | ||
1706 | ||
1707 | /* Find the matching reloc type. */ | |
1708 | static bfd_reloc_code_real_type | |
28dbbc02 | 1709 | map_operator_to_reloc (unsigned char operator, bfd_boolean is_literal) |
bbdd25a8 BW |
1710 | { |
1711 | struct suffix_reloc_map *sfx; | |
1712 | bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED; | |
1713 | ||
1714 | for (sfx = &suffix_relocs[0]; sfx->suffix; sfx++) | |
1715 | { | |
1716 | if (sfx->operator == operator) | |
1717 | { | |
1718 | reloc = sfx->reloc; | |
1719 | break; | |
1720 | } | |
1721 | } | |
1722 | ||
28dbbc02 BW |
1723 | if (is_literal) |
1724 | { | |
1725 | if (reloc == BFD_RELOC_XTENSA_TLS_FUNC) | |
1726 | return BFD_RELOC_XTENSA_TLSDESC_FN; | |
1727 | else if (reloc == BFD_RELOC_XTENSA_TLS_ARG) | |
1728 | return BFD_RELOC_XTENSA_TLSDESC_ARG; | |
1729 | } | |
1730 | ||
bbdd25a8 BW |
1731 | if (reloc == BFD_RELOC_UNUSED) |
1732 | return BFD_RELOC_32; | |
1733 | ||
1734 | return reloc; | |
1735 | } | |
1736 | ||
1737 | ||
e0001a05 | 1738 | static const char * |
7fa3d080 | 1739 | expression_end (const char *name) |
e0001a05 NC |
1740 | { |
1741 | while (1) | |
1742 | { | |
1743 | switch (*name) | |
1744 | { | |
43cd72b9 | 1745 | case '}': |
e0001a05 NC |
1746 | case ';': |
1747 | case '\0': | |
1748 | case ',': | |
43cd72b9 | 1749 | case ':': |
e0001a05 NC |
1750 | return name; |
1751 | case ' ': | |
1752 | case '\t': | |
1753 | ++name; | |
1754 | continue; | |
1755 | default: | |
1756 | return 0; | |
1757 | } | |
1758 | } | |
1759 | } | |
1760 | ||
1761 | ||
1762 | #define ERROR_REG_NUM ((unsigned) -1) | |
1763 | ||
1764 | static unsigned | |
7fa3d080 | 1765 | tc_get_register (const char *prefix) |
e0001a05 NC |
1766 | { |
1767 | unsigned reg; | |
1768 | const char *next_expr; | |
1769 | const char *old_line_pointer; | |
1770 | ||
1771 | SKIP_WHITESPACE (); | |
1772 | old_line_pointer = input_line_pointer; | |
1773 | ||
1774 | if (*input_line_pointer == '$') | |
1775 | ++input_line_pointer; | |
1776 | ||
1777 | /* Accept "sp" as a synonym for "a1". */ | |
1778 | if (input_line_pointer[0] == 's' && input_line_pointer[1] == 'p' | |
1779 | && expression_end (input_line_pointer + 2)) | |
1780 | { | |
1781 | input_line_pointer += 2; | |
1782 | return 1; /* AR[1] */ | |
1783 | } | |
1784 | ||
1785 | while (*input_line_pointer++ == *prefix++) | |
1786 | ; | |
1787 | --input_line_pointer; | |
1788 | --prefix; | |
1789 | ||
1790 | if (*prefix) | |
1791 | { | |
1792 | as_bad (_("bad register name: %s"), old_line_pointer); | |
1793 | return ERROR_REG_NUM; | |
1794 | } | |
1795 | ||
1796 | if (!ISDIGIT ((unsigned char) *input_line_pointer)) | |
1797 | { | |
1798 | as_bad (_("bad register number: %s"), input_line_pointer); | |
1799 | return ERROR_REG_NUM; | |
1800 | } | |
1801 | ||
1802 | reg = 0; | |
1803 | ||
1804 | while (ISDIGIT ((int) *input_line_pointer)) | |
1805 | reg = reg * 10 + *input_line_pointer++ - '0'; | |
1806 | ||
1807 | if (!(next_expr = expression_end (input_line_pointer))) | |
1808 | { | |
1809 | as_bad (_("bad register name: %s"), old_line_pointer); | |
1810 | return ERROR_REG_NUM; | |
1811 | } | |
1812 | ||
1813 | input_line_pointer = (char *) next_expr; | |
1814 | ||
1815 | return reg; | |
1816 | } | |
1817 | ||
1818 | ||
e0001a05 | 1819 | static void |
7fa3d080 | 1820 | expression_maybe_register (xtensa_opcode opc, int opnd, expressionS *tok) |
e0001a05 | 1821 | { |
43cd72b9 | 1822 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 | 1823 | |
43cd72b9 BW |
1824 | /* Check if this is an immediate operand. */ |
1825 | if (xtensa_operand_is_register (isa, opc, opnd) == 0) | |
e0001a05 | 1826 | { |
43cd72b9 | 1827 | bfd_reloc_code_real_type reloc; |
e0001a05 | 1828 | segT t = expression (tok); |
43cd72b9 BW |
1829 | if (t == absolute_section |
1830 | && xtensa_operand_is_PCrelative (isa, opc, opnd) == 1) | |
e0001a05 | 1831 | { |
9c2799c2 | 1832 | gas_assert (tok->X_op == O_constant); |
e0001a05 NC |
1833 | tok->X_op = O_symbol; |
1834 | tok->X_add_symbol = &abs_symbol; | |
1835 | } | |
43cd72b9 BW |
1836 | |
1837 | if ((tok->X_op == O_constant || tok->X_op == O_symbol) | |
bbdd25a8 BW |
1838 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, tok)) |
1839 | != BFD_RELOC_NONE)) | |
e0001a05 | 1840 | { |
1bbb5f21 | 1841 | switch (reloc) |
43cd72b9 | 1842 | { |
1bbb5f21 BW |
1843 | case BFD_RELOC_LO16: |
1844 | if (tok->X_op == O_constant) | |
bbdd25a8 | 1845 | { |
43cd72b9 | 1846 | tok->X_add_number &= 0xffff; |
bbdd25a8 | 1847 | return; |
1bbb5f21 BW |
1848 | } |
1849 | break; | |
1850 | case BFD_RELOC_HI16: | |
1851 | if (tok->X_op == O_constant) | |
1852 | { | |
43cd72b9 | 1853 | tok->X_add_number = ((unsigned) tok->X_add_number) >> 16; |
bbdd25a8 | 1854 | return; |
bbdd25a8 | 1855 | } |
1bbb5f21 BW |
1856 | break; |
1857 | case BFD_RELOC_UNUSED: | |
1858 | as_bad (_("unsupported relocation")); | |
1859 | return; | |
1860 | case BFD_RELOC_32_PCREL: | |
1861 | as_bad (_("pcrel relocation not allowed in an instruction")); | |
1862 | return; | |
1863 | default: | |
1864 | break; | |
43cd72b9 | 1865 | } |
bbdd25a8 | 1866 | tok->X_op = map_suffix_reloc_to_operator (reloc); |
e0001a05 | 1867 | } |
e0001a05 NC |
1868 | } |
1869 | else | |
1870 | { | |
43cd72b9 BW |
1871 | xtensa_regfile opnd_rf = xtensa_operand_regfile (isa, opc, opnd); |
1872 | unsigned reg = tc_get_register (xtensa_regfile_shortname (isa, opnd_rf)); | |
e0001a05 NC |
1873 | |
1874 | if (reg != ERROR_REG_NUM) /* Already errored */ | |
1875 | { | |
1876 | uint32 buf = reg; | |
43cd72b9 | 1877 | if (xtensa_operand_encode (isa, opc, opnd, &buf)) |
e0001a05 NC |
1878 | as_bad (_("register number out of range")); |
1879 | } | |
1880 | ||
1881 | tok->X_op = O_register; | |
1882 | tok->X_add_symbol = 0; | |
1883 | tok->X_add_number = reg; | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | ||
1888 | /* Split up the arguments for an opcode or pseudo-op. */ | |
1889 | ||
1890 | static int | |
7fa3d080 | 1891 | tokenize_arguments (char **args, char *str) |
e0001a05 NC |
1892 | { |
1893 | char *old_input_line_pointer; | |
1894 | bfd_boolean saw_comma = FALSE; | |
1895 | bfd_boolean saw_arg = FALSE; | |
43cd72b9 | 1896 | bfd_boolean saw_colon = FALSE; |
e0001a05 NC |
1897 | int num_args = 0; |
1898 | char *arg_end, *arg; | |
1899 | int arg_len; | |
43cd72b9 BW |
1900 | |
1901 | /* Save and restore input_line_pointer around this function. */ | |
e0001a05 NC |
1902 | old_input_line_pointer = input_line_pointer; |
1903 | input_line_pointer = str; | |
1904 | ||
1905 | while (*input_line_pointer) | |
1906 | { | |
1907 | SKIP_WHITESPACE (); | |
1908 | switch (*input_line_pointer) | |
1909 | { | |
1910 | case '\0': | |
43cd72b9 | 1911 | case '}': |
e0001a05 NC |
1912 | goto fini; |
1913 | ||
43cd72b9 BW |
1914 | case ':': |
1915 | input_line_pointer++; | |
1916 | if (saw_comma || saw_colon || !saw_arg) | |
1917 | goto err; | |
1918 | saw_colon = TRUE; | |
1919 | break; | |
1920 | ||
e0001a05 NC |
1921 | case ',': |
1922 | input_line_pointer++; | |
43cd72b9 | 1923 | if (saw_comma || saw_colon || !saw_arg) |
e0001a05 NC |
1924 | goto err; |
1925 | saw_comma = TRUE; | |
1926 | break; | |
1927 | ||
1928 | default: | |
43cd72b9 | 1929 | if (!saw_comma && !saw_colon && saw_arg) |
e0001a05 NC |
1930 | goto err; |
1931 | ||
1932 | arg_end = input_line_pointer + 1; | |
1933 | while (!expression_end (arg_end)) | |
1934 | arg_end += 1; | |
43cd72b9 | 1935 | |
e0001a05 | 1936 | arg_len = arg_end - input_line_pointer; |
43cd72b9 | 1937 | arg = (char *) xmalloc ((saw_colon ? 1 : 0) + arg_len + 1); |
e0001a05 NC |
1938 | args[num_args] = arg; |
1939 | ||
43cd72b9 BW |
1940 | if (saw_colon) |
1941 | *arg++ = ':'; | |
e0001a05 NC |
1942 | strncpy (arg, input_line_pointer, arg_len); |
1943 | arg[arg_len] = '\0'; | |
43cd72b9 | 1944 | |
e0001a05 NC |
1945 | input_line_pointer = arg_end; |
1946 | num_args += 1; | |
c138bc38 | 1947 | saw_comma = FALSE; |
43cd72b9 | 1948 | saw_colon = FALSE; |
c138bc38 | 1949 | saw_arg = TRUE; |
e0001a05 NC |
1950 | break; |
1951 | } | |
1952 | } | |
1953 | ||
1954 | fini: | |
43cd72b9 | 1955 | if (saw_comma || saw_colon) |
e0001a05 NC |
1956 | goto err; |
1957 | input_line_pointer = old_input_line_pointer; | |
1958 | return num_args; | |
1959 | ||
1960 | err: | |
43cd72b9 BW |
1961 | if (saw_comma) |
1962 | as_bad (_("extra comma")); | |
1963 | else if (saw_colon) | |
1964 | as_bad (_("extra colon")); | |
1965 | else if (!saw_arg) | |
c138bc38 | 1966 | as_bad (_("missing argument")); |
43cd72b9 BW |
1967 | else |
1968 | as_bad (_("missing comma or colon")); | |
e0001a05 NC |
1969 | input_line_pointer = old_input_line_pointer; |
1970 | return -1; | |
1971 | } | |
1972 | ||
1973 | ||
43cd72b9 | 1974 | /* Parse the arguments to an opcode. Return TRUE on error. */ |
e0001a05 NC |
1975 | |
1976 | static bfd_boolean | |
7fa3d080 | 1977 | parse_arguments (TInsn *insn, int num_args, char **arg_strings) |
e0001a05 | 1978 | { |
43cd72b9 | 1979 | expressionS *tok, *last_tok; |
e0001a05 NC |
1980 | xtensa_opcode opcode = insn->opcode; |
1981 | bfd_boolean had_error = TRUE; | |
43cd72b9 BW |
1982 | xtensa_isa isa = xtensa_default_isa; |
1983 | int n, num_regs = 0; | |
e0001a05 | 1984 | int opcode_operand_count; |
43cd72b9 BW |
1985 | int opnd_cnt, last_opnd_cnt; |
1986 | unsigned int next_reg = 0; | |
e0001a05 NC |
1987 | char *old_input_line_pointer; |
1988 | ||
1989 | if (insn->insn_type == ITYPE_LITERAL) | |
1990 | opcode_operand_count = 1; | |
1991 | else | |
43cd72b9 | 1992 | opcode_operand_count = xtensa_opcode_num_operands (isa, opcode); |
e0001a05 | 1993 | |
43cd72b9 | 1994 | tok = insn->tok; |
e0001a05 NC |
1995 | memset (tok, 0, sizeof (*tok) * MAX_INSN_ARGS); |
1996 | ||
1997 | /* Save and restore input_line_pointer around this function. */ | |
43cd72b9 BW |
1998 | old_input_line_pointer = input_line_pointer; |
1999 | ||
2000 | last_tok = 0; | |
2001 | last_opnd_cnt = -1; | |
2002 | opnd_cnt = 0; | |
2003 | ||
2004 | /* Skip invisible operands. */ | |
2005 | while (xtensa_operand_is_visible (isa, opcode, opnd_cnt) == 0) | |
2006 | { | |
2007 | opnd_cnt += 1; | |
2008 | tok++; | |
2009 | } | |
e0001a05 NC |
2010 | |
2011 | for (n = 0; n < num_args; n++) | |
43cd72b9 | 2012 | { |
e0001a05 | 2013 | input_line_pointer = arg_strings[n]; |
43cd72b9 BW |
2014 | if (*input_line_pointer == ':') |
2015 | { | |
2016 | xtensa_regfile opnd_rf; | |
2017 | input_line_pointer++; | |
2018 | if (num_regs == 0) | |
2019 | goto err; | |
9c2799c2 | 2020 | gas_assert (opnd_cnt > 0); |
43cd72b9 BW |
2021 | num_regs--; |
2022 | opnd_rf = xtensa_operand_regfile (isa, opcode, last_opnd_cnt); | |
2023 | if (next_reg | |
2024 | != tc_get_register (xtensa_regfile_shortname (isa, opnd_rf))) | |
2025 | as_warn (_("incorrect register number, ignoring")); | |
2026 | next_reg++; | |
2027 | } | |
2028 | else | |
2029 | { | |
2030 | if (opnd_cnt >= opcode_operand_count) | |
2031 | { | |
2032 | as_warn (_("too many arguments")); | |
2033 | goto err; | |
2034 | } | |
9c2799c2 | 2035 | gas_assert (opnd_cnt < MAX_INSN_ARGS); |
43cd72b9 BW |
2036 | |
2037 | expression_maybe_register (opcode, opnd_cnt, tok); | |
2038 | next_reg = tok->X_add_number + 1; | |
2039 | ||
2040 | if (tok->X_op == O_illegal || tok->X_op == O_absent) | |
2041 | goto err; | |
2042 | if (xtensa_operand_is_register (isa, opcode, opnd_cnt) == 1) | |
2043 | { | |
2044 | num_regs = xtensa_operand_num_regs (isa, opcode, opnd_cnt) - 1; | |
2045 | /* minus 1 because we are seeing one right now */ | |
2046 | } | |
2047 | else | |
2048 | num_regs = 0; | |
e0001a05 | 2049 | |
43cd72b9 BW |
2050 | last_tok = tok; |
2051 | last_opnd_cnt = opnd_cnt; | |
1ec520b7 | 2052 | demand_empty_rest_of_line (); |
e0001a05 | 2053 | |
43cd72b9 BW |
2054 | do |
2055 | { | |
2056 | opnd_cnt += 1; | |
2057 | tok++; | |
2058 | } | |
2059 | while (xtensa_operand_is_visible (isa, opcode, opnd_cnt) == 0); | |
2060 | } | |
2061 | } | |
e0001a05 | 2062 | |
43cd72b9 BW |
2063 | if (num_regs > 0 && ((int) next_reg != last_tok->X_add_number + 1)) |
2064 | goto err; | |
e0001a05 NC |
2065 | |
2066 | insn->ntok = tok - insn->tok; | |
c138bc38 | 2067 | had_error = FALSE; |
e0001a05 NC |
2068 | |
2069 | err: | |
43cd72b9 | 2070 | input_line_pointer = old_input_line_pointer; |
e0001a05 NC |
2071 | return had_error; |
2072 | } | |
2073 | ||
2074 | ||
43cd72b9 | 2075 | static int |
7fa3d080 | 2076 | get_invisible_operands (TInsn *insn) |
43cd72b9 BW |
2077 | { |
2078 | xtensa_isa isa = xtensa_default_isa; | |
2079 | static xtensa_insnbuf slotbuf = NULL; | |
2080 | xtensa_format fmt; | |
2081 | xtensa_opcode opc = insn->opcode; | |
2082 | int slot, opnd, fmt_found; | |
2083 | unsigned val; | |
2084 | ||
2085 | if (!slotbuf) | |
2086 | slotbuf = xtensa_insnbuf_alloc (isa); | |
2087 | ||
2088 | /* Find format/slot where this can be encoded. */ | |
2089 | fmt_found = 0; | |
2090 | slot = 0; | |
2091 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
2092 | { | |
2093 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
2094 | { | |
2095 | if (xtensa_opcode_encode (isa, fmt, slot, slotbuf, opc) == 0) | |
2096 | { | |
2097 | fmt_found = 1; | |
2098 | break; | |
2099 | } | |
2100 | } | |
2101 | if (fmt_found) break; | |
2102 | } | |
2103 | ||
2104 | if (!fmt_found) | |
2105 | { | |
2106 | as_bad (_("cannot encode opcode \"%s\""), xtensa_opcode_name (isa, opc)); | |
2107 | return -1; | |
2108 | } | |
2109 | ||
2110 | /* First encode all the visible operands | |
2111 | (to deal with shared field operands). */ | |
2112 | for (opnd = 0; opnd < insn->ntok; opnd++) | |
2113 | { | |
2114 | if (xtensa_operand_is_visible (isa, opc, opnd) == 1 | |
2115 | && (insn->tok[opnd].X_op == O_register | |
2116 | || insn->tok[opnd].X_op == O_constant)) | |
2117 | { | |
2118 | val = insn->tok[opnd].X_add_number; | |
2119 | xtensa_operand_encode (isa, opc, opnd, &val); | |
2120 | xtensa_operand_set_field (isa, opc, opnd, fmt, slot, slotbuf, val); | |
2121 | } | |
2122 | } | |
2123 | ||
2124 | /* Then pull out the values for the invisible ones. */ | |
2125 | for (opnd = 0; opnd < insn->ntok; opnd++) | |
2126 | { | |
2127 | if (xtensa_operand_is_visible (isa, opc, opnd) == 0) | |
2128 | { | |
2129 | xtensa_operand_get_field (isa, opc, opnd, fmt, slot, slotbuf, &val); | |
2130 | xtensa_operand_decode (isa, opc, opnd, &val); | |
2131 | insn->tok[opnd].X_add_number = val; | |
2132 | if (xtensa_operand_is_register (isa, opc, opnd) == 1) | |
2133 | insn->tok[opnd].X_op = O_register; | |
2134 | else | |
2135 | insn->tok[opnd].X_op = O_constant; | |
2136 | } | |
2137 | } | |
2138 | ||
2139 | return 0; | |
2140 | } | |
2141 | ||
2142 | ||
e0001a05 | 2143 | static void |
7fa3d080 | 2144 | xg_reverse_shift_count (char **cnt_argp) |
e0001a05 NC |
2145 | { |
2146 | char *cnt_arg, *new_arg; | |
2147 | cnt_arg = *cnt_argp; | |
2148 | ||
2149 | /* replace the argument with "31-(argument)" */ | |
2150 | new_arg = (char *) xmalloc (strlen (cnt_arg) + 6); | |
2151 | sprintf (new_arg, "31-(%s)", cnt_arg); | |
2152 | ||
2153 | free (cnt_arg); | |
2154 | *cnt_argp = new_arg; | |
2155 | } | |
2156 | ||
2157 | ||
2158 | /* If "arg" is a constant expression, return non-zero with the value | |
2159 | in *valp. */ | |
2160 | ||
2161 | static int | |
7fa3d080 | 2162 | xg_arg_is_constant (char *arg, offsetT *valp) |
e0001a05 NC |
2163 | { |
2164 | expressionS exp; | |
2165 | char *save_ptr = input_line_pointer; | |
2166 | ||
2167 | input_line_pointer = arg; | |
2168 | expression (&exp); | |
2169 | input_line_pointer = save_ptr; | |
2170 | ||
2171 | if (exp.X_op == O_constant) | |
2172 | { | |
2173 | *valp = exp.X_add_number; | |
2174 | return 1; | |
2175 | } | |
2176 | ||
2177 | return 0; | |
2178 | } | |
2179 | ||
2180 | ||
2181 | static void | |
7fa3d080 | 2182 | xg_replace_opname (char **popname, char *newop) |
e0001a05 NC |
2183 | { |
2184 | free (*popname); | |
2185 | *popname = (char *) xmalloc (strlen (newop) + 1); | |
2186 | strcpy (*popname, newop); | |
2187 | } | |
2188 | ||
2189 | ||
2190 | static int | |
7fa3d080 BW |
2191 | xg_check_num_args (int *pnum_args, |
2192 | int expected_num, | |
2193 | char *opname, | |
2194 | char **arg_strings) | |
e0001a05 NC |
2195 | { |
2196 | int num_args = *pnum_args; | |
2197 | ||
43cd72b9 | 2198 | if (num_args < expected_num) |
e0001a05 NC |
2199 | { |
2200 | as_bad (_("not enough operands (%d) for '%s'; expected %d"), | |
2201 | num_args, opname, expected_num); | |
2202 | return -1; | |
2203 | } | |
2204 | ||
2205 | if (num_args > expected_num) | |
2206 | { | |
2207 | as_warn (_("too many operands (%d) for '%s'; expected %d"), | |
2208 | num_args, opname, expected_num); | |
2209 | while (num_args-- > expected_num) | |
2210 | { | |
2211 | free (arg_strings[num_args]); | |
2212 | arg_strings[num_args] = 0; | |
2213 | } | |
2214 | *pnum_args = expected_num; | |
2215 | return -1; | |
2216 | } | |
2217 | ||
2218 | return 0; | |
2219 | } | |
2220 | ||
2221 | ||
43cd72b9 BW |
2222 | /* If the register is not specified as part of the opcode, |
2223 | then get it from the operand and move it to the opcode. */ | |
2224 | ||
e0001a05 | 2225 | static int |
7fa3d080 | 2226 | xg_translate_sysreg_op (char **popname, int *pnum_args, char **arg_strings) |
e0001a05 | 2227 | { |
43cd72b9 BW |
2228 | xtensa_isa isa = xtensa_default_isa; |
2229 | xtensa_sysreg sr; | |
e0001a05 | 2230 | char *opname, *new_opname; |
43cd72b9 BW |
2231 | const char *sr_name; |
2232 | int is_user, is_write; | |
e0001a05 NC |
2233 | |
2234 | opname = *popname; | |
2235 | if (*opname == '_') | |
80ca4e2c | 2236 | opname += 1; |
43cd72b9 BW |
2237 | is_user = (opname[1] == 'u'); |
2238 | is_write = (opname[0] == 'w'); | |
e0001a05 | 2239 | |
43cd72b9 | 2240 | /* Opname == [rw]ur or [rwx]sr... */ |
e0001a05 | 2241 | |
43cd72b9 BW |
2242 | if (xg_check_num_args (pnum_args, 2, opname, arg_strings)) |
2243 | return -1; | |
e0001a05 | 2244 | |
43cd72b9 BW |
2245 | /* Check if the argument is a symbolic register name. */ |
2246 | sr = xtensa_sysreg_lookup_name (isa, arg_strings[1]); | |
2247 | /* Handle WSR to "INTSET" as a special case. */ | |
2248 | if (sr == XTENSA_UNDEFINED && is_write && !is_user | |
2249 | && !strcasecmp (arg_strings[1], "intset")) | |
2250 | sr = xtensa_sysreg_lookup_name (isa, "interrupt"); | |
2251 | if (sr == XTENSA_UNDEFINED | |
2252 | || (xtensa_sysreg_is_user (isa, sr) == 1) != is_user) | |
2253 | { | |
2254 | /* Maybe it's a register number.... */ | |
2255 | offsetT val; | |
e0001a05 NC |
2256 | if (!xg_arg_is_constant (arg_strings[1], &val)) |
2257 | { | |
43cd72b9 BW |
2258 | as_bad (_("invalid register '%s' for '%s' instruction"), |
2259 | arg_strings[1], opname); | |
e0001a05 NC |
2260 | return -1; |
2261 | } | |
43cd72b9 BW |
2262 | sr = xtensa_sysreg_lookup (isa, val, is_user); |
2263 | if (sr == XTENSA_UNDEFINED) | |
e0001a05 | 2264 | { |
43cd72b9 | 2265 | as_bad (_("invalid register number (%ld) for '%s' instruction"), |
dd49a749 | 2266 | (long) val, opname); |
e0001a05 NC |
2267 | return -1; |
2268 | } | |
43cd72b9 | 2269 | } |
e0001a05 | 2270 | |
43cd72b9 BW |
2271 | /* Remove the last argument, which is now part of the opcode. */ |
2272 | free (arg_strings[1]); | |
2273 | arg_strings[1] = 0; | |
2274 | *pnum_args = 1; | |
2275 | ||
2276 | /* Translate the opcode. */ | |
2277 | sr_name = xtensa_sysreg_name (isa, sr); | |
2278 | /* Another special case for "WSR.INTSET".... */ | |
2279 | if (is_write && !is_user && !strcasecmp ("interrupt", sr_name)) | |
2280 | sr_name = "intset"; | |
2281 | new_opname = (char *) xmalloc (strlen (sr_name) + 6); | |
80ca4e2c | 2282 | sprintf (new_opname, "%s.%s", *popname, sr_name); |
43cd72b9 BW |
2283 | free (*popname); |
2284 | *popname = new_opname; | |
2285 | ||
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | ||
2290 | static int | |
7fa3d080 | 2291 | xtensa_translate_old_userreg_ops (char **popname) |
43cd72b9 BW |
2292 | { |
2293 | xtensa_isa isa = xtensa_default_isa; | |
2294 | xtensa_sysreg sr; | |
2295 | char *opname, *new_opname; | |
2296 | const char *sr_name; | |
2297 | bfd_boolean has_underbar = FALSE; | |
2298 | ||
2299 | opname = *popname; | |
2300 | if (opname[0] == '_') | |
2301 | { | |
2302 | has_underbar = TRUE; | |
2303 | opname += 1; | |
2304 | } | |
2305 | ||
2306 | sr = xtensa_sysreg_lookup_name (isa, opname + 1); | |
2307 | if (sr != XTENSA_UNDEFINED) | |
2308 | { | |
2309 | /* The new default name ("nnn") is different from the old default | |
2310 | name ("URnnn"). The old default is handled below, and we don't | |
2311 | want to recognize [RW]nnn, so do nothing if the name is the (new) | |
2312 | default. */ | |
2313 | static char namebuf[10]; | |
2314 | sprintf (namebuf, "%d", xtensa_sysreg_number (isa, sr)); | |
2315 | if (strcmp (namebuf, opname + 1) == 0) | |
2316 | return 0; | |
2317 | } | |
2318 | else | |
2319 | { | |
2320 | offsetT val; | |
2321 | char *end; | |
2322 | ||
2323 | /* Only continue if the reg name is "URnnn". */ | |
2324 | if (opname[1] != 'u' || opname[2] != 'r') | |
2325 | return 0; | |
2326 | val = strtoul (opname + 3, &end, 10); | |
2327 | if (*end != '\0') | |
2328 | return 0; | |
2329 | ||
2330 | sr = xtensa_sysreg_lookup (isa, val, 1); | |
2331 | if (sr == XTENSA_UNDEFINED) | |
2332 | { | |
2333 | as_bad (_("invalid register number (%ld) for '%s'"), | |
dd49a749 | 2334 | (long) val, opname); |
43cd72b9 BW |
2335 | return -1; |
2336 | } | |
2337 | } | |
2338 | ||
2339 | /* Translate the opcode. */ | |
2340 | sr_name = xtensa_sysreg_name (isa, sr); | |
2341 | new_opname = (char *) xmalloc (strlen (sr_name) + 6); | |
2342 | sprintf (new_opname, "%s%cur.%s", (has_underbar ? "_" : ""), | |
2343 | opname[0], sr_name); | |
2344 | free (*popname); | |
2345 | *popname = new_opname; | |
2346 | ||
2347 | return 0; | |
2348 | } | |
2349 | ||
2350 | ||
2351 | static int | |
7fa3d080 BW |
2352 | xtensa_translate_zero_immed (char *old_op, |
2353 | char *new_op, | |
2354 | char **popname, | |
2355 | int *pnum_args, | |
2356 | char **arg_strings) | |
43cd72b9 BW |
2357 | { |
2358 | char *opname; | |
2359 | offsetT val; | |
2360 | ||
2361 | opname = *popname; | |
9c2799c2 | 2362 | gas_assert (opname[0] != '_'); |
43cd72b9 BW |
2363 | |
2364 | if (strcmp (opname, old_op) != 0) | |
2365 | return 0; | |
e0001a05 | 2366 | |
43cd72b9 BW |
2367 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) |
2368 | return -1; | |
2369 | if (xg_arg_is_constant (arg_strings[1], &val) && val == 0) | |
2370 | { | |
2371 | xg_replace_opname (popname, new_op); | |
2372 | free (arg_strings[1]); | |
2373 | arg_strings[1] = arg_strings[2]; | |
2374 | arg_strings[2] = 0; | |
2375 | *pnum_args = 2; | |
e0001a05 NC |
2376 | } |
2377 | ||
2378 | return 0; | |
2379 | } | |
2380 | ||
2381 | ||
2382 | /* If the instruction is an idiom (i.e., a built-in macro), translate it. | |
2383 | Returns non-zero if an error was found. */ | |
2384 | ||
2385 | static int | |
7fa3d080 | 2386 | xg_translate_idioms (char **popname, int *pnum_args, char **arg_strings) |
e0001a05 NC |
2387 | { |
2388 | char *opname = *popname; | |
2389 | bfd_boolean has_underbar = FALSE; | |
2390 | ||
2391 | if (*opname == '_') | |
2392 | { | |
2393 | has_underbar = TRUE; | |
2394 | opname += 1; | |
2395 | } | |
2396 | ||
2397 | if (strcmp (opname, "mov") == 0) | |
2398 | { | |
43cd72b9 | 2399 | if (use_transform () && !has_underbar && density_supported) |
e0001a05 NC |
2400 | xg_replace_opname (popname, "mov.n"); |
2401 | else | |
2402 | { | |
2403 | if (xg_check_num_args (pnum_args, 2, opname, arg_strings)) | |
2404 | return -1; | |
2405 | xg_replace_opname (popname, (has_underbar ? "_or" : "or")); | |
2406 | arg_strings[2] = (char *) xmalloc (strlen (arg_strings[1]) + 1); | |
2407 | strcpy (arg_strings[2], arg_strings[1]); | |
2408 | *pnum_args = 3; | |
2409 | } | |
2410 | return 0; | |
2411 | } | |
2412 | ||
2413 | if (strcmp (opname, "bbsi.l") == 0) | |
2414 | { | |
2415 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) | |
2416 | return -1; | |
2417 | xg_replace_opname (popname, (has_underbar ? "_bbsi" : "bbsi")); | |
2418 | if (target_big_endian) | |
2419 | xg_reverse_shift_count (&arg_strings[1]); | |
2420 | return 0; | |
2421 | } | |
2422 | ||
2423 | if (strcmp (opname, "bbci.l") == 0) | |
2424 | { | |
2425 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) | |
2426 | return -1; | |
2427 | xg_replace_opname (popname, (has_underbar ? "_bbci" : "bbci")); | |
2428 | if (target_big_endian) | |
2429 | xg_reverse_shift_count (&arg_strings[1]); | |
2430 | return 0; | |
2431 | } | |
2432 | ||
eb6d9dce BW |
2433 | /* Don't do anything special with NOPs inside FLIX instructions. They |
2434 | are handled elsewhere. Real NOP instructions are always available | |
2435 | in configurations with FLIX, so this should never be an issue but | |
2436 | check for it anyway. */ | |
2437 | if (!cur_vinsn.inside_bundle && xtensa_nop_opcode == XTENSA_UNDEFINED | |
43cd72b9 | 2438 | && strcmp (opname, "nop") == 0) |
e0001a05 | 2439 | { |
43cd72b9 | 2440 | if (use_transform () && !has_underbar && density_supported) |
e0001a05 NC |
2441 | xg_replace_opname (popname, "nop.n"); |
2442 | else | |
2443 | { | |
2444 | if (xg_check_num_args (pnum_args, 0, opname, arg_strings)) | |
2445 | return -1; | |
2446 | xg_replace_opname (popname, (has_underbar ? "_or" : "or")); | |
2447 | arg_strings[0] = (char *) xmalloc (3); | |
2448 | arg_strings[1] = (char *) xmalloc (3); | |
2449 | arg_strings[2] = (char *) xmalloc (3); | |
2450 | strcpy (arg_strings[0], "a1"); | |
2451 | strcpy (arg_strings[1], "a1"); | |
2452 | strcpy (arg_strings[2], "a1"); | |
2453 | *pnum_args = 3; | |
2454 | } | |
2455 | return 0; | |
2456 | } | |
2457 | ||
43cd72b9 BW |
2458 | /* Recognize [RW]UR and [RWX]SR. */ |
2459 | if ((((opname[0] == 'r' || opname[0] == 'w') | |
2460 | && (opname[1] == 'u' || opname[1] == 's')) | |
2461 | || (opname[0] == 'x' && opname[1] == 's')) | |
2462 | && opname[2] == 'r' | |
2463 | && opname[3] == '\0') | |
e0001a05 NC |
2464 | return xg_translate_sysreg_op (popname, pnum_args, arg_strings); |
2465 | ||
43cd72b9 BW |
2466 | /* Backward compatibility for RUR and WUR: Recognize [RW]UR<nnn> and |
2467 | [RW]<name> if <name> is the non-default name of a user register. */ | |
2468 | if ((opname[0] == 'r' || opname[0] == 'w') | |
2469 | && xtensa_opcode_lookup (xtensa_default_isa, opname) == XTENSA_UNDEFINED) | |
2470 | return xtensa_translate_old_userreg_ops (popname); | |
e0001a05 | 2471 | |
43cd72b9 BW |
2472 | /* Relax branches that don't allow comparisons against an immediate value |
2473 | of zero to the corresponding branches with implicit zero immediates. */ | |
2474 | if (!has_underbar && use_transform ()) | |
2475 | { | |
2476 | if (xtensa_translate_zero_immed ("bnei", "bnez", popname, | |
2477 | pnum_args, arg_strings)) | |
2478 | return -1; | |
e0001a05 | 2479 | |
43cd72b9 BW |
2480 | if (xtensa_translate_zero_immed ("beqi", "beqz", popname, |
2481 | pnum_args, arg_strings)) | |
2482 | return -1; | |
e0001a05 | 2483 | |
43cd72b9 BW |
2484 | if (xtensa_translate_zero_immed ("bgei", "bgez", popname, |
2485 | pnum_args, arg_strings)) | |
2486 | return -1; | |
e0001a05 | 2487 | |
43cd72b9 BW |
2488 | if (xtensa_translate_zero_immed ("blti", "bltz", popname, |
2489 | pnum_args, arg_strings)) | |
2490 | return -1; | |
2491 | } | |
e0001a05 | 2492 | |
43cd72b9 BW |
2493 | return 0; |
2494 | } | |
e0001a05 | 2495 | |
43cd72b9 BW |
2496 | \f |
2497 | /* Functions for dealing with the Xtensa ISA. */ | |
e0001a05 | 2498 | |
43cd72b9 BW |
2499 | /* Currently the assembler only allows us to use a single target per |
2500 | fragment. Because of this, only one operand for a given | |
2501 | instruction may be symbolic. If there is a PC-relative operand, | |
2502 | the last one is chosen. Otherwise, the result is the number of the | |
2503 | last immediate operand, and if there are none of those, we fail and | |
2504 | return -1. */ | |
e0001a05 | 2505 | |
7fa3d080 BW |
2506 | static int |
2507 | get_relaxable_immed (xtensa_opcode opcode) | |
43cd72b9 BW |
2508 | { |
2509 | int last_immed = -1; | |
2510 | int noperands, opi; | |
e0001a05 | 2511 | |
43cd72b9 BW |
2512 | if (opcode == XTENSA_UNDEFINED) |
2513 | return -1; | |
e0001a05 | 2514 | |
43cd72b9 BW |
2515 | noperands = xtensa_opcode_num_operands (xtensa_default_isa, opcode); |
2516 | for (opi = noperands - 1; opi >= 0; opi--) | |
2517 | { | |
2518 | if (xtensa_operand_is_visible (xtensa_default_isa, opcode, opi) == 0) | |
2519 | continue; | |
2520 | if (xtensa_operand_is_PCrelative (xtensa_default_isa, opcode, opi) == 1) | |
2521 | return opi; | |
2522 | if (last_immed == -1 | |
2523 | && xtensa_operand_is_register (xtensa_default_isa, opcode, opi) == 0) | |
2524 | last_immed = opi; | |
e0001a05 | 2525 | } |
43cd72b9 | 2526 | return last_immed; |
e0001a05 NC |
2527 | } |
2528 | ||
e0001a05 | 2529 | |
43cd72b9 | 2530 | static xtensa_opcode |
7fa3d080 | 2531 | get_opcode_from_buf (const char *buf, int slot) |
e0001a05 | 2532 | { |
43cd72b9 BW |
2533 | static xtensa_insnbuf insnbuf = NULL; |
2534 | static xtensa_insnbuf slotbuf = NULL; | |
2535 | xtensa_isa isa = xtensa_default_isa; | |
2536 | xtensa_format fmt; | |
2537 | ||
2538 | if (!insnbuf) | |
e0001a05 | 2539 | { |
43cd72b9 BW |
2540 | insnbuf = xtensa_insnbuf_alloc (isa); |
2541 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 2542 | } |
e0001a05 | 2543 | |
d77b99c9 | 2544 | xtensa_insnbuf_from_chars (isa, insnbuf, (const unsigned char *) buf, 0); |
43cd72b9 BW |
2545 | fmt = xtensa_format_decode (isa, insnbuf); |
2546 | if (fmt == XTENSA_UNDEFINED) | |
2547 | return XTENSA_UNDEFINED; | |
e0001a05 | 2548 | |
43cd72b9 BW |
2549 | if (slot >= xtensa_format_num_slots (isa, fmt)) |
2550 | return XTENSA_UNDEFINED; | |
e0001a05 | 2551 | |
43cd72b9 BW |
2552 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
2553 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
e0001a05 NC |
2554 | } |
2555 | ||
2556 | ||
43cd72b9 | 2557 | #ifdef TENSILICA_DEBUG |
e0001a05 | 2558 | |
43cd72b9 | 2559 | /* For debugging, print out the mapping of opcode numbers to opcodes. */ |
e0001a05 | 2560 | |
7fa3d080 BW |
2561 | static void |
2562 | xtensa_print_insn_table (void) | |
43cd72b9 BW |
2563 | { |
2564 | int num_opcodes, num_operands; | |
2565 | xtensa_opcode opcode; | |
2566 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 | 2567 | |
43cd72b9 BW |
2568 | num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
2569 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
e0001a05 | 2570 | { |
43cd72b9 BW |
2571 | int opn; |
2572 | fprintf (stderr, "%d: %s: ", opcode, xtensa_opcode_name (isa, opcode)); | |
2573 | num_operands = xtensa_opcode_num_operands (isa, opcode); | |
2574 | for (opn = 0; opn < num_operands; opn++) | |
2575 | { | |
2576 | if (xtensa_operand_is_visible (isa, opcode, opn) == 0) | |
2577 | continue; | |
2578 | if (xtensa_operand_is_register (isa, opcode, opn) == 1) | |
2579 | { | |
2580 | xtensa_regfile opnd_rf = | |
2581 | xtensa_operand_regfile (isa, opcode, opn); | |
2582 | fprintf (stderr, "%s ", xtensa_regfile_shortname (isa, opnd_rf)); | |
2583 | } | |
2584 | else if (xtensa_operand_is_PCrelative (isa, opcode, opn) == 1) | |
2585 | fputs ("[lLr] ", stderr); | |
2586 | else | |
2587 | fputs ("i ", stderr); | |
2588 | } | |
2589 | fprintf (stderr, "\n"); | |
e0001a05 | 2590 | } |
e0001a05 NC |
2591 | } |
2592 | ||
2593 | ||
43cd72b9 | 2594 | static void |
7fa3d080 | 2595 | print_vliw_insn (xtensa_insnbuf vbuf) |
e0001a05 | 2596 | { |
e0001a05 | 2597 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
2598 | xtensa_format f = xtensa_format_decode (isa, vbuf); |
2599 | xtensa_insnbuf sbuf = xtensa_insnbuf_alloc (isa); | |
2600 | int op; | |
e0001a05 | 2601 | |
43cd72b9 | 2602 | fprintf (stderr, "format = %d\n", f); |
e0001a05 | 2603 | |
43cd72b9 BW |
2604 | for (op = 0; op < xtensa_format_num_slots (isa, f); op++) |
2605 | { | |
2606 | xtensa_opcode opcode; | |
2607 | const char *opname; | |
2608 | int operands; | |
2609 | ||
2610 | xtensa_format_get_slot (isa, f, op, vbuf, sbuf); | |
2611 | opcode = xtensa_opcode_decode (isa, f, op, sbuf); | |
2612 | opname = xtensa_opcode_name (isa, opcode); | |
2613 | ||
2614 | fprintf (stderr, "op in slot %i is %s;\n", op, opname); | |
2615 | fprintf (stderr, " operands = "); | |
2616 | for (operands = 0; | |
2617 | operands < xtensa_opcode_num_operands (isa, opcode); | |
2618 | operands++) | |
2619 | { | |
2620 | unsigned int val; | |
2621 | if (xtensa_operand_is_visible (isa, opcode, operands) == 0) | |
2622 | continue; | |
2623 | xtensa_operand_get_field (isa, opcode, operands, f, op, sbuf, &val); | |
2624 | xtensa_operand_decode (isa, opcode, operands, &val); | |
2625 | fprintf (stderr, "%d ", val); | |
2626 | } | |
2627 | fprintf (stderr, "\n"); | |
2628 | } | |
2629 | xtensa_insnbuf_free (isa, sbuf); | |
e0001a05 NC |
2630 | } |
2631 | ||
43cd72b9 BW |
2632 | #endif /* TENSILICA_DEBUG */ |
2633 | ||
e0001a05 NC |
2634 | |
2635 | static bfd_boolean | |
7fa3d080 | 2636 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 | 2637 | { |
43cd72b9 BW |
2638 | xtensa_isa isa = xtensa_default_isa; |
2639 | int n, num_operands; | |
e0001a05 | 2640 | |
64b607e6 | 2641 | if (xtensa_opcode_is_call (isa, opcode) != 1) |
e0001a05 NC |
2642 | return FALSE; |
2643 | ||
43cd72b9 BW |
2644 | num_operands = xtensa_opcode_num_operands (isa, opcode); |
2645 | for (n = 0; n < num_operands; n++) | |
2646 | { | |
2647 | if (xtensa_operand_is_register (isa, opcode, n) == 0 | |
2648 | && xtensa_operand_is_PCrelative (isa, opcode, n) == 1) | |
2649 | return TRUE; | |
2650 | } | |
2651 | return FALSE; | |
e0001a05 NC |
2652 | } |
2653 | ||
2654 | ||
43cd72b9 BW |
2655 | /* Convert from BFD relocation type code to slot and operand number. |
2656 | Returns non-zero on failure. */ | |
e0001a05 | 2657 | |
43cd72b9 | 2658 | static int |
7fa3d080 | 2659 | decode_reloc (bfd_reloc_code_real_type reloc, int *slot, bfd_boolean *is_alt) |
e0001a05 | 2660 | { |
43cd72b9 BW |
2661 | if (reloc >= BFD_RELOC_XTENSA_SLOT0_OP |
2662 | && reloc <= BFD_RELOC_XTENSA_SLOT14_OP) | |
e0001a05 | 2663 | { |
43cd72b9 BW |
2664 | *slot = reloc - BFD_RELOC_XTENSA_SLOT0_OP; |
2665 | *is_alt = FALSE; | |
e0001a05 | 2666 | } |
43cd72b9 BW |
2667 | else if (reloc >= BFD_RELOC_XTENSA_SLOT0_ALT |
2668 | && reloc <= BFD_RELOC_XTENSA_SLOT14_ALT) | |
e0001a05 | 2669 | { |
43cd72b9 BW |
2670 | *slot = reloc - BFD_RELOC_XTENSA_SLOT0_ALT; |
2671 | *is_alt = TRUE; | |
e0001a05 | 2672 | } |
43cd72b9 BW |
2673 | else |
2674 | return -1; | |
2675 | ||
2676 | return 0; | |
e0001a05 NC |
2677 | } |
2678 | ||
2679 | ||
43cd72b9 BW |
2680 | /* Convert from slot number to BFD relocation type code for the |
2681 | standard PC-relative relocations. Return BFD_RELOC_NONE on | |
2682 | failure. */ | |
e0001a05 | 2683 | |
43cd72b9 | 2684 | static bfd_reloc_code_real_type |
7fa3d080 | 2685 | encode_reloc (int slot) |
e0001a05 | 2686 | { |
43cd72b9 BW |
2687 | if (slot < 0 || slot > 14) |
2688 | return BFD_RELOC_NONE; | |
2689 | ||
2690 | return BFD_RELOC_XTENSA_SLOT0_OP + slot; | |
e0001a05 NC |
2691 | } |
2692 | ||
2693 | ||
43cd72b9 BW |
2694 | /* Convert from slot numbers to BFD relocation type code for the |
2695 | "alternate" relocations. Return BFD_RELOC_NONE on failure. */ | |
e0001a05 | 2696 | |
43cd72b9 | 2697 | static bfd_reloc_code_real_type |
7fa3d080 | 2698 | encode_alt_reloc (int slot) |
e0001a05 | 2699 | { |
43cd72b9 BW |
2700 | if (slot < 0 || slot > 14) |
2701 | return BFD_RELOC_NONE; | |
2702 | ||
2703 | return BFD_RELOC_XTENSA_SLOT0_ALT + slot; | |
e0001a05 NC |
2704 | } |
2705 | ||
2706 | ||
2707 | static void | |
7fa3d080 BW |
2708 | xtensa_insnbuf_set_operand (xtensa_insnbuf slotbuf, |
2709 | xtensa_format fmt, | |
2710 | int slot, | |
2711 | xtensa_opcode opcode, | |
2712 | int operand, | |
2713 | uint32 value, | |
2714 | const char *file, | |
2715 | unsigned int line) | |
e0001a05 | 2716 | { |
e0001a05 NC |
2717 | uint32 valbuf = value; |
2718 | ||
43cd72b9 | 2719 | if (xtensa_operand_encode (xtensa_default_isa, opcode, operand, &valbuf)) |
e0001a05 | 2720 | { |
43cd72b9 BW |
2721 | if (xtensa_operand_is_PCrelative (xtensa_default_isa, opcode, operand) |
2722 | == 1) | |
2723 | as_bad_where ((char *) file, line, | |
d7c531cd BW |
2724 | _("operand %d of '%s' has out of range value '%u'"), |
2725 | operand + 1, | |
2726 | xtensa_opcode_name (xtensa_default_isa, opcode), | |
2727 | value); | |
43cd72b9 BW |
2728 | else |
2729 | as_bad_where ((char *) file, line, | |
d7c531cd BW |
2730 | _("operand %d of '%s' has invalid value '%u'"), |
2731 | operand + 1, | |
2732 | xtensa_opcode_name (xtensa_default_isa, opcode), | |
2733 | value); | |
43cd72b9 | 2734 | return; |
e0001a05 NC |
2735 | } |
2736 | ||
43cd72b9 BW |
2737 | xtensa_operand_set_field (xtensa_default_isa, opcode, operand, fmt, slot, |
2738 | slotbuf, valbuf); | |
e0001a05 NC |
2739 | } |
2740 | ||
2741 | ||
2742 | static uint32 | |
7fa3d080 BW |
2743 | xtensa_insnbuf_get_operand (xtensa_insnbuf slotbuf, |
2744 | xtensa_format fmt, | |
2745 | int slot, | |
2746 | xtensa_opcode opcode, | |
2747 | int opnum) | |
e0001a05 | 2748 | { |
43cd72b9 BW |
2749 | uint32 val = 0; |
2750 | (void) xtensa_operand_get_field (xtensa_default_isa, opcode, opnum, | |
2751 | fmt, slot, slotbuf, &val); | |
2752 | (void) xtensa_operand_decode (xtensa_default_isa, opcode, opnum, &val); | |
2753 | return val; | |
e0001a05 NC |
2754 | } |
2755 | ||
e0001a05 | 2756 | \f |
7fa3d080 | 2757 | /* Checks for rules from xtensa-relax tables. */ |
e0001a05 | 2758 | |
7fa3d080 BW |
2759 | /* The routine xg_instruction_matches_option_term must return TRUE |
2760 | when a given option term is true. The meaning of all of the option | |
19e8f41a | 2761 | terms is given interpretation by this function. */ |
e0001a05 | 2762 | |
7fa3d080 | 2763 | static bfd_boolean |
19e8f41a | 2764 | xg_instruction_matches_option_term (TInsn *insn, const ReqOrOption *option) |
e0001a05 | 2765 | { |
7fa3d080 BW |
2766 | if (strcmp (option->option_name, "realnop") == 0 |
2767 | || strncmp (option->option_name, "IsaUse", 6) == 0) | |
2768 | { | |
2769 | /* These conditions were evaluated statically when building the | |
2770 | relaxation table. There's no need to reevaluate them now. */ | |
2771 | return TRUE; | |
2772 | } | |
19e8f41a BW |
2773 | else if (strcmp (option->option_name, "FREEREG") == 0) |
2774 | return insn->extra_arg.X_op == O_register; | |
7fa3d080 BW |
2775 | else |
2776 | { | |
2777 | as_fatal (_("internal error: unknown option name '%s'"), | |
2778 | option->option_name); | |
2779 | } | |
e0001a05 NC |
2780 | } |
2781 | ||
2782 | ||
7fa3d080 BW |
2783 | static bfd_boolean |
2784 | xg_instruction_matches_or_options (TInsn *insn, | |
2785 | const ReqOrOptionList *or_option) | |
e0001a05 | 2786 | { |
7fa3d080 BW |
2787 | const ReqOrOption *option; |
2788 | /* Must match each of the AND terms. */ | |
2789 | for (option = or_option; option != NULL; option = option->next) | |
e0001a05 | 2790 | { |
7fa3d080 BW |
2791 | if (xg_instruction_matches_option_term (insn, option)) |
2792 | return TRUE; | |
e0001a05 | 2793 | } |
7fa3d080 | 2794 | return FALSE; |
e0001a05 NC |
2795 | } |
2796 | ||
2797 | ||
7fa3d080 BW |
2798 | static bfd_boolean |
2799 | xg_instruction_matches_options (TInsn *insn, const ReqOptionList *options) | |
e0001a05 | 2800 | { |
7fa3d080 BW |
2801 | const ReqOption *req_options; |
2802 | /* Must match each of the AND terms. */ | |
2803 | for (req_options = options; | |
2804 | req_options != NULL; | |
2805 | req_options = req_options->next) | |
e0001a05 | 2806 | { |
7fa3d080 BW |
2807 | /* Must match one of the OR clauses. */ |
2808 | if (!xg_instruction_matches_or_options (insn, | |
2809 | req_options->or_option_terms)) | |
2810 | return FALSE; | |
e0001a05 | 2811 | } |
7fa3d080 | 2812 | return TRUE; |
e0001a05 NC |
2813 | } |
2814 | ||
2815 | ||
7fa3d080 | 2816 | /* Return the transition rule that matches or NULL if none matches. */ |
e0001a05 | 2817 | |
7fa3d080 BW |
2818 | static bfd_boolean |
2819 | xg_instruction_matches_rule (TInsn *insn, TransitionRule *rule) | |
e0001a05 | 2820 | { |
7fa3d080 | 2821 | PreconditionList *condition_l; |
e0001a05 | 2822 | |
7fa3d080 BW |
2823 | if (rule->opcode != insn->opcode) |
2824 | return FALSE; | |
e0001a05 | 2825 | |
7fa3d080 BW |
2826 | for (condition_l = rule->conditions; |
2827 | condition_l != NULL; | |
2828 | condition_l = condition_l->next) | |
e0001a05 | 2829 | { |
7fa3d080 BW |
2830 | expressionS *exp1; |
2831 | expressionS *exp2; | |
2832 | Precondition *cond = condition_l->precond; | |
e0001a05 | 2833 | |
7fa3d080 | 2834 | switch (cond->typ) |
e0001a05 | 2835 | { |
7fa3d080 BW |
2836 | case OP_CONSTANT: |
2837 | /* The expression must be the constant. */ | |
9c2799c2 | 2838 | gas_assert (cond->op_num < insn->ntok); |
7fa3d080 BW |
2839 | exp1 = &insn->tok[cond->op_num]; |
2840 | if (expr_is_const (exp1)) | |
2841 | { | |
2842 | switch (cond->cmp) | |
2843 | { | |
2844 | case OP_EQUAL: | |
2845 | if (get_expr_const (exp1) != cond->op_data) | |
2846 | return FALSE; | |
2847 | break; | |
2848 | case OP_NOTEQUAL: | |
2849 | if (get_expr_const (exp1) == cond->op_data) | |
2850 | return FALSE; | |
2851 | break; | |
2852 | default: | |
2853 | return FALSE; | |
2854 | } | |
2855 | } | |
2856 | else if (expr_is_register (exp1)) | |
2857 | { | |
2858 | switch (cond->cmp) | |
2859 | { | |
2860 | case OP_EQUAL: | |
2861 | if (get_expr_register (exp1) != cond->op_data) | |
2862 | return FALSE; | |
2863 | break; | |
2864 | case OP_NOTEQUAL: | |
2865 | if (get_expr_register (exp1) == cond->op_data) | |
2866 | return FALSE; | |
2867 | break; | |
2868 | default: | |
2869 | return FALSE; | |
2870 | } | |
2871 | } | |
2872 | else | |
2873 | return FALSE; | |
2874 | break; | |
2875 | ||
2876 | case OP_OPERAND: | |
9c2799c2 NC |
2877 | gas_assert (cond->op_num < insn->ntok); |
2878 | gas_assert (cond->op_data < insn->ntok); | |
7fa3d080 BW |
2879 | exp1 = &insn->tok[cond->op_num]; |
2880 | exp2 = &insn->tok[cond->op_data]; | |
2881 | ||
2882 | switch (cond->cmp) | |
2883 | { | |
2884 | case OP_EQUAL: | |
2885 | if (!expr_is_equal (exp1, exp2)) | |
2886 | return FALSE; | |
2887 | break; | |
2888 | case OP_NOTEQUAL: | |
2889 | if (expr_is_equal (exp1, exp2)) | |
2890 | return FALSE; | |
2891 | break; | |
2892 | } | |
2893 | break; | |
2894 | ||
2895 | case OP_LITERAL: | |
2896 | case OP_LABEL: | |
2897 | default: | |
2898 | return FALSE; | |
2899 | } | |
2900 | } | |
2901 | if (!xg_instruction_matches_options (insn, rule->options)) | |
2902 | return FALSE; | |
2903 | ||
2904 | return TRUE; | |
2905 | } | |
2906 | ||
2907 | ||
2908 | static int | |
2909 | transition_rule_cmp (const TransitionRule *a, const TransitionRule *b) | |
2910 | { | |
2911 | bfd_boolean a_greater = FALSE; | |
2912 | bfd_boolean b_greater = FALSE; | |
2913 | ||
2914 | ReqOptionList *l_a = a->options; | |
2915 | ReqOptionList *l_b = b->options; | |
2916 | ||
2917 | /* We only care if they both are the same except for | |
2918 | a const16 vs. an l32r. */ | |
2919 | ||
2920 | while (l_a && l_b && ((l_a->next == NULL) == (l_b->next == NULL))) | |
2921 | { | |
2922 | ReqOrOptionList *l_or_a = l_a->or_option_terms; | |
2923 | ReqOrOptionList *l_or_b = l_b->or_option_terms; | |
2924 | while (l_or_a && l_or_b && ((l_a->next == NULL) == (l_b->next == NULL))) | |
2925 | { | |
2926 | if (l_or_a->is_true != l_or_b->is_true) | |
2927 | return 0; | |
2928 | if (strcmp (l_or_a->option_name, l_or_b->option_name) != 0) | |
2929 | { | |
2930 | /* This is the case we care about. */ | |
2931 | if (strcmp (l_or_a->option_name, "IsaUseConst16") == 0 | |
2932 | && strcmp (l_or_b->option_name, "IsaUseL32R") == 0) | |
2933 | { | |
2934 | if (prefer_const16) | |
2935 | a_greater = TRUE; | |
2936 | else | |
2937 | b_greater = TRUE; | |
2938 | } | |
2939 | else if (strcmp (l_or_a->option_name, "IsaUseL32R") == 0 | |
2940 | && strcmp (l_or_b->option_name, "IsaUseConst16") == 0) | |
2941 | { | |
2942 | if (prefer_const16) | |
2943 | b_greater = TRUE; | |
2944 | else | |
2945 | a_greater = TRUE; | |
2946 | } | |
2947 | else | |
2948 | return 0; | |
2949 | } | |
2950 | l_or_a = l_or_a->next; | |
2951 | l_or_b = l_or_b->next; | |
2952 | } | |
2953 | if (l_or_a || l_or_b) | |
2954 | return 0; | |
2955 | ||
2956 | l_a = l_a->next; | |
2957 | l_b = l_b->next; | |
2958 | } | |
2959 | if (l_a || l_b) | |
2960 | return 0; | |
2961 | ||
2962 | /* Incomparable if the substitution was used differently in two cases. */ | |
2963 | if (a_greater && b_greater) | |
2964 | return 0; | |
2965 | ||
2966 | if (b_greater) | |
2967 | return 1; | |
2968 | if (a_greater) | |
2969 | return -1; | |
2970 | ||
2971 | return 0; | |
2972 | } | |
2973 | ||
2974 | ||
2975 | static TransitionRule * | |
2976 | xg_instruction_match (TInsn *insn) | |
2977 | { | |
2978 | TransitionTable *table = xg_build_simplify_table (&transition_rule_cmp); | |
2979 | TransitionList *l; | |
9c2799c2 | 2980 | gas_assert (insn->opcode < table->num_opcodes); |
7fa3d080 BW |
2981 | |
2982 | /* Walk through all of the possible transitions. */ | |
2983 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
2984 | { | |
2985 | TransitionRule *rule = l->rule; | |
2986 | if (xg_instruction_matches_rule (insn, rule)) | |
2987 | return rule; | |
2988 | } | |
2989 | return NULL; | |
2990 | } | |
2991 | ||
2992 | \f | |
2993 | /* Various Other Internal Functions. */ | |
2994 | ||
2995 | static bfd_boolean | |
2996 | is_unique_insn_expansion (TransitionRule *r) | |
2997 | { | |
2998 | if (!r->to_instr || r->to_instr->next != NULL) | |
2999 | return FALSE; | |
3000 | if (r->to_instr->typ != INSTR_INSTR) | |
3001 | return FALSE; | |
3002 | return TRUE; | |
3003 | } | |
3004 | ||
3005 | ||
84b08ed9 BW |
3006 | /* Check if there is exactly one relaxation for INSN that converts it to |
3007 | another instruction of equal or larger size. If so, and if TARG is | |
3008 | non-null, go ahead and generate the relaxed instruction into TARG. If | |
3009 | NARROW_ONLY is true, then only consider relaxations that widen a narrow | |
3010 | instruction, i.e., ignore relaxations that convert to an instruction of | |
3011 | equal size. In some contexts where this function is used, only | |
c138bc38 | 3012 | a single widening is allowed and the NARROW_ONLY argument is used to |
84b08ed9 BW |
3013 | exclude cases like ADDI being "widened" to an ADDMI, which may |
3014 | later be relaxed to an ADDMI/ADDI pair. */ | |
7fa3d080 | 3015 | |
84b08ed9 BW |
3016 | bfd_boolean |
3017 | xg_is_single_relaxable_insn (TInsn *insn, TInsn *targ, bfd_boolean narrow_only) | |
7fa3d080 BW |
3018 | { |
3019 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3020 | TransitionList *l; | |
84b08ed9 | 3021 | TransitionRule *match = 0; |
7fa3d080 | 3022 | |
9c2799c2 NC |
3023 | gas_assert (insn->insn_type == ITYPE_INSN); |
3024 | gas_assert (insn->opcode < table->num_opcodes); | |
7fa3d080 BW |
3025 | |
3026 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3027 | { | |
3028 | TransitionRule *rule = l->rule; | |
3029 | ||
3030 | if (xg_instruction_matches_rule (insn, rule) | |
84b08ed9 BW |
3031 | && is_unique_insn_expansion (rule) |
3032 | && (xg_get_single_size (insn->opcode) + (narrow_only ? 1 : 0) | |
3033 | <= xg_get_single_size (rule->to_instr->opcode))) | |
7fa3d080 | 3034 | { |
84b08ed9 BW |
3035 | if (match) |
3036 | return FALSE; | |
3037 | match = rule; | |
7fa3d080 BW |
3038 | } |
3039 | } | |
84b08ed9 BW |
3040 | if (!match) |
3041 | return FALSE; | |
3042 | ||
3043 | if (targ) | |
3044 | xg_build_to_insn (targ, insn, match->to_instr); | |
3045 | return TRUE; | |
7fa3d080 BW |
3046 | } |
3047 | ||
3048 | ||
3049 | /* Return the maximum number of bytes this opcode can expand to. */ | |
3050 | ||
3051 | static int | |
3052 | xg_get_max_insn_widen_size (xtensa_opcode opcode) | |
3053 | { | |
3054 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3055 | TransitionList *l; | |
3056 | int max_size = xg_get_single_size (opcode); | |
3057 | ||
9c2799c2 | 3058 | gas_assert (opcode < table->num_opcodes); |
7fa3d080 BW |
3059 | |
3060 | for (l = table->table[opcode]; l != NULL; l = l->next) | |
3061 | { | |
3062 | TransitionRule *rule = l->rule; | |
3063 | BuildInstr *build_list; | |
3064 | int this_size = 0; | |
3065 | ||
3066 | if (!rule) | |
3067 | continue; | |
3068 | build_list = rule->to_instr; | |
3069 | if (is_unique_insn_expansion (rule)) | |
3070 | { | |
9c2799c2 | 3071 | gas_assert (build_list->typ == INSTR_INSTR); |
7fa3d080 BW |
3072 | this_size = xg_get_max_insn_widen_size (build_list->opcode); |
3073 | } | |
3074 | else | |
3075 | for (; build_list != NULL; build_list = build_list->next) | |
3076 | { | |
3077 | switch (build_list->typ) | |
3078 | { | |
3079 | case INSTR_INSTR: | |
3080 | this_size += xg_get_single_size (build_list->opcode); | |
3081 | break; | |
3082 | case INSTR_LITERAL_DEF: | |
3083 | case INSTR_LABEL_DEF: | |
e0001a05 NC |
3084 | default: |
3085 | break; | |
3086 | } | |
3087 | } | |
3088 | if (this_size > max_size) | |
3089 | max_size = this_size; | |
3090 | } | |
3091 | return max_size; | |
3092 | } | |
3093 | ||
3094 | ||
3095 | /* Return the maximum number of literal bytes this opcode can generate. */ | |
3096 | ||
7fa3d080 BW |
3097 | static int |
3098 | xg_get_max_insn_widen_literal_size (xtensa_opcode opcode) | |
e0001a05 | 3099 | { |
43cd72b9 | 3100 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); |
e0001a05 NC |
3101 | TransitionList *l; |
3102 | int max_size = 0; | |
3103 | ||
9c2799c2 | 3104 | gas_assert (opcode < table->num_opcodes); |
e0001a05 NC |
3105 | |
3106 | for (l = table->table[opcode]; l != NULL; l = l->next) | |
3107 | { | |
3108 | TransitionRule *rule = l->rule; | |
3109 | BuildInstr *build_list; | |
3110 | int this_size = 0; | |
3111 | ||
3112 | if (!rule) | |
3113 | continue; | |
3114 | build_list = rule->to_instr; | |
3115 | if (is_unique_insn_expansion (rule)) | |
3116 | { | |
9c2799c2 | 3117 | gas_assert (build_list->typ == INSTR_INSTR); |
e0001a05 NC |
3118 | this_size = xg_get_max_insn_widen_literal_size (build_list->opcode); |
3119 | } | |
3120 | else | |
3121 | for (; build_list != NULL; build_list = build_list->next) | |
3122 | { | |
3123 | switch (build_list->typ) | |
3124 | { | |
3125 | case INSTR_LITERAL_DEF: | |
43cd72b9 | 3126 | /* Hard-coded 4-byte literal. */ |
e0001a05 NC |
3127 | this_size += 4; |
3128 | break; | |
3129 | case INSTR_INSTR: | |
3130 | case INSTR_LABEL_DEF: | |
3131 | default: | |
3132 | break; | |
3133 | } | |
3134 | } | |
3135 | if (this_size > max_size) | |
3136 | max_size = this_size; | |
3137 | } | |
3138 | return max_size; | |
3139 | } | |
3140 | ||
3141 | ||
7fa3d080 BW |
3142 | static bfd_boolean |
3143 | xg_is_relaxable_insn (TInsn *insn, int lateral_steps) | |
3144 | { | |
3145 | int steps_taken = 0; | |
3146 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3147 | TransitionList *l; | |
3148 | ||
9c2799c2 NC |
3149 | gas_assert (insn->insn_type == ITYPE_INSN); |
3150 | gas_assert (insn->opcode < table->num_opcodes); | |
7fa3d080 BW |
3151 | |
3152 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3153 | { | |
3154 | TransitionRule *rule = l->rule; | |
3155 | ||
3156 | if (xg_instruction_matches_rule (insn, rule)) | |
3157 | { | |
3158 | if (steps_taken == lateral_steps) | |
3159 | return TRUE; | |
3160 | steps_taken++; | |
3161 | } | |
3162 | } | |
3163 | return FALSE; | |
3164 | } | |
3165 | ||
3166 | ||
3167 | static symbolS * | |
3168 | get_special_literal_symbol (void) | |
3169 | { | |
3170 | static symbolS *sym = NULL; | |
3171 | ||
3172 | if (sym == NULL) | |
3173 | sym = symbol_find_or_make ("SPECIAL_LITERAL0\001"); | |
3174 | return sym; | |
3175 | } | |
3176 | ||
3177 | ||
3178 | static symbolS * | |
3179 | get_special_label_symbol (void) | |
3180 | { | |
3181 | static symbolS *sym = NULL; | |
3182 | ||
3183 | if (sym == NULL) | |
3184 | sym = symbol_find_or_make ("SPECIAL_LABEL0\001"); | |
3185 | return sym; | |
3186 | } | |
3187 | ||
3188 | ||
3189 | static bfd_boolean | |
3190 | xg_valid_literal_expression (const expressionS *exp) | |
3191 | { | |
3192 | switch (exp->X_op) | |
3193 | { | |
3194 | case O_constant: | |
3195 | case O_symbol: | |
3196 | case O_big: | |
3197 | case O_uminus: | |
3198 | case O_subtract: | |
3199 | case O_pltrel: | |
1bbb5f21 | 3200 | case O_pcrel: |
28dbbc02 BW |
3201 | case O_tlsfunc: |
3202 | case O_tlsarg: | |
3203 | case O_tpoff: | |
3204 | case O_dtpoff: | |
7fa3d080 BW |
3205 | return TRUE; |
3206 | default: | |
3207 | return FALSE; | |
3208 | } | |
3209 | } | |
3210 | ||
3211 | ||
3212 | /* This will check to see if the value can be converted into the | |
3213 | operand type. It will return TRUE if it does not fit. */ | |
3214 | ||
3215 | static bfd_boolean | |
3216 | xg_check_operand (int32 value, xtensa_opcode opcode, int operand) | |
3217 | { | |
3218 | uint32 valbuf = value; | |
3219 | if (xtensa_operand_encode (xtensa_default_isa, opcode, operand, &valbuf)) | |
3220 | return TRUE; | |
3221 | return FALSE; | |
3222 | } | |
3223 | ||
3224 | ||
3225 | /* Assumes: All immeds are constants. Check that all constants fit | |
3226 | into their immeds; return FALSE if not. */ | |
3227 | ||
3228 | static bfd_boolean | |
3229 | xg_immeds_fit (const TInsn *insn) | |
3230 | { | |
3231 | xtensa_isa isa = xtensa_default_isa; | |
3232 | int i; | |
3233 | ||
3234 | int n = insn->ntok; | |
9c2799c2 | 3235 | gas_assert (insn->insn_type == ITYPE_INSN); |
7fa3d080 BW |
3236 | for (i = 0; i < n; ++i) |
3237 | { | |
3238 | const expressionS *expr = &insn->tok[i]; | |
3239 | if (xtensa_operand_is_register (isa, insn->opcode, i) == 1) | |
3240 | continue; | |
3241 | ||
3242 | switch (expr->X_op) | |
3243 | { | |
3244 | case O_register: | |
3245 | case O_constant: | |
3246 | if (xg_check_operand (expr->X_add_number, insn->opcode, i)) | |
3247 | return FALSE; | |
3248 | break; | |
3249 | ||
3250 | default: | |
3251 | /* The symbol should have a fixup associated with it. */ | |
9c2799c2 | 3252 | gas_assert (FALSE); |
7fa3d080 BW |
3253 | break; |
3254 | } | |
3255 | } | |
3256 | return TRUE; | |
3257 | } | |
3258 | ||
3259 | ||
3260 | /* This should only be called after we have an initial | |
3261 | estimate of the addresses. */ | |
3262 | ||
3263 | static bfd_boolean | |
3264 | xg_symbolic_immeds_fit (const TInsn *insn, | |
3265 | segT pc_seg, | |
3266 | fragS *pc_frag, | |
3267 | offsetT pc_offset, | |
3268 | long stretch) | |
e0001a05 | 3269 | { |
7fa3d080 BW |
3270 | xtensa_isa isa = xtensa_default_isa; |
3271 | symbolS *symbolP; | |
3272 | fragS *sym_frag; | |
3273 | offsetT target, pc; | |
3274 | uint32 new_offset; | |
3275 | int i; | |
3276 | int n = insn->ntok; | |
e0001a05 | 3277 | |
9c2799c2 | 3278 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 | 3279 | |
7fa3d080 | 3280 | for (i = 0; i < n; ++i) |
e0001a05 | 3281 | { |
7fa3d080 BW |
3282 | const expressionS *expr = &insn->tok[i]; |
3283 | if (xtensa_operand_is_register (isa, insn->opcode, i) == 1) | |
3284 | continue; | |
e0001a05 | 3285 | |
7fa3d080 | 3286 | switch (expr->X_op) |
e0001a05 | 3287 | { |
7fa3d080 BW |
3288 | case O_register: |
3289 | case O_constant: | |
3290 | if (xg_check_operand (expr->X_add_number, insn->opcode, i)) | |
3291 | return FALSE; | |
3292 | break; | |
e0001a05 | 3293 | |
7fa3d080 BW |
3294 | case O_lo16: |
3295 | case O_hi16: | |
3296 | /* Check for the worst case. */ | |
3297 | if (xg_check_operand (0xffff, insn->opcode, i)) | |
3298 | return FALSE; | |
3299 | break; | |
e0001a05 | 3300 | |
7fa3d080 | 3301 | case O_symbol: |
7c834684 | 3302 | /* We only allow symbols for PC-relative references. |
7fa3d080 | 3303 | If pc_frag == 0, then we don't have frag locations yet. */ |
7c834684 BW |
3304 | if (pc_frag == 0 |
3305 | || xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 0) | |
7fa3d080 | 3306 | return FALSE; |
e0001a05 | 3307 | |
8e6bc631 BW |
3308 | /* If it is a weak symbol or a symbol in a different section, |
3309 | it cannot be known to fit at assembly time. */ | |
3310 | if (S_IS_WEAK (expr->X_add_symbol) | |
3311 | || S_GET_SEGMENT (expr->X_add_symbol) != pc_seg) | |
7c834684 | 3312 | { |
8e6bc631 | 3313 | /* For a direct call with --no-longcalls, be optimistic and |
38f9cb7f BW |
3314 | assume it will be in range. If the symbol is weak and |
3315 | undefined, it may remain undefined at link-time, in which | |
3316 | case it will have a zero value and almost certainly be out | |
3317 | of range for a direct call; thus, relax for undefined weak | |
3318 | symbols even if longcalls is not enabled. */ | |
8e6bc631 | 3319 | if (is_direct_call_opcode (insn->opcode) |
38f9cb7f BW |
3320 | && ! pc_frag->tc_frag_data.use_longcalls |
3321 | && (! S_IS_WEAK (expr->X_add_symbol) | |
3322 | || S_IS_DEFINED (expr->X_add_symbol))) | |
7c834684 | 3323 | return TRUE; |
7c834684 | 3324 | |
8e6bc631 BW |
3325 | return FALSE; |
3326 | } | |
e0001a05 | 3327 | |
7fa3d080 BW |
3328 | symbolP = expr->X_add_symbol; |
3329 | sym_frag = symbol_get_frag (symbolP); | |
3330 | target = S_GET_VALUE (symbolP) + expr->X_add_number; | |
3331 | pc = pc_frag->fr_address + pc_offset; | |
e0001a05 | 3332 | |
7fa3d080 BW |
3333 | /* If frag has yet to be reached on this pass, assume it |
3334 | will move by STRETCH just as we did. If this is not so, | |
3335 | it will be because some frag between grows, and that will | |
3336 | force another pass. Beware zero-length frags. There | |
3337 | should be a faster way to do this. */ | |
3338 | ||
3339 | if (stretch != 0 | |
3340 | && sym_frag->relax_marker != pc_frag->relax_marker | |
3341 | && S_GET_SEGMENT (symbolP) == pc_seg) | |
3342 | { | |
3343 | target += stretch; | |
3344 | } | |
c138bc38 | 3345 | |
7fa3d080 BW |
3346 | new_offset = target; |
3347 | xtensa_operand_do_reloc (isa, insn->opcode, i, &new_offset, pc); | |
3348 | if (xg_check_operand (new_offset, insn->opcode, i)) | |
3349 | return FALSE; | |
3350 | break; | |
3351 | ||
3352 | default: | |
3353 | /* The symbol should have a fixup associated with it. */ | |
3354 | return FALSE; | |
3355 | } | |
3356 | } | |
3357 | ||
3358 | return TRUE; | |
e0001a05 NC |
3359 | } |
3360 | ||
3361 | ||
43cd72b9 | 3362 | /* Return TRUE on success. */ |
e0001a05 | 3363 | |
7fa3d080 BW |
3364 | static bfd_boolean |
3365 | xg_build_to_insn (TInsn *targ, TInsn *insn, BuildInstr *bi) | |
e0001a05 NC |
3366 | { |
3367 | BuildOp *op; | |
3368 | symbolS *sym; | |
3369 | ||
60242db2 | 3370 | tinsn_init (targ); |
b224e962 BW |
3371 | targ->debug_line = insn->debug_line; |
3372 | targ->loc_directive_seen = insn->loc_directive_seen; | |
e0001a05 NC |
3373 | switch (bi->typ) |
3374 | { | |
3375 | case INSTR_INSTR: | |
3376 | op = bi->ops; | |
3377 | targ->opcode = bi->opcode; | |
3378 | targ->insn_type = ITYPE_INSN; | |
3379 | targ->is_specific_opcode = FALSE; | |
3380 | ||
3381 | for (; op != NULL; op = op->next) | |
3382 | { | |
3383 | int op_num = op->op_num; | |
3384 | int op_data = op->op_data; | |
3385 | ||
9c2799c2 | 3386 | gas_assert (op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3387 | |
3388 | if (targ->ntok <= op_num) | |
3389 | targ->ntok = op_num + 1; | |
3390 | ||
3391 | switch (op->typ) | |
3392 | { | |
3393 | case OP_CONSTANT: | |
3394 | set_expr_const (&targ->tok[op_num], op_data); | |
3395 | break; | |
3396 | case OP_OPERAND: | |
9c2799c2 | 3397 | gas_assert (op_data < insn->ntok); |
e0001a05 NC |
3398 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); |
3399 | break; | |
19e8f41a BW |
3400 | case OP_FREEREG: |
3401 | if (insn->extra_arg.X_op != O_register) | |
3402 | return FALSE; | |
3403 | copy_expr (&targ->tok[op_num], &insn->extra_arg); | |
3404 | break; | |
e0001a05 NC |
3405 | case OP_LITERAL: |
3406 | sym = get_special_literal_symbol (); | |
3407 | set_expr_symbol_offset (&targ->tok[op_num], sym, 0); | |
28dbbc02 BW |
3408 | if (insn->tok[op_data].X_op == O_tlsfunc |
3409 | || insn->tok[op_data].X_op == O_tlsarg) | |
19e8f41a | 3410 | copy_expr (&targ->extra_arg, &insn->tok[op_data]); |
e0001a05 NC |
3411 | break; |
3412 | case OP_LABEL: | |
3413 | sym = get_special_label_symbol (); | |
3414 | set_expr_symbol_offset (&targ->tok[op_num], sym, 0); | |
3415 | break; | |
43cd72b9 BW |
3416 | case OP_OPERAND_HI16U: |
3417 | case OP_OPERAND_LOW16U: | |
9c2799c2 | 3418 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3419 | if (expr_is_const (&insn->tok[op_data])) |
3420 | { | |
3421 | long val; | |
3422 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3423 | val = xg_apply_userdef_op_fn (op->typ, | |
3424 | targ->tok[op_num]. | |
3425 | X_add_number); | |
3426 | targ->tok[op_num].X_add_number = val; | |
3427 | } | |
3428 | else | |
3429 | { | |
3430 | /* For const16 we can create relocations for these. */ | |
3431 | if (targ->opcode == XTENSA_UNDEFINED | |
3432 | || (targ->opcode != xtensa_const16_opcode)) | |
3433 | return FALSE; | |
9c2799c2 | 3434 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3435 | /* Need to build a O_lo16 or O_hi16. */ |
3436 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3437 | if (targ->tok[op_num].X_op == O_symbol) | |
3438 | { | |
3439 | if (op->typ == OP_OPERAND_HI16U) | |
3440 | targ->tok[op_num].X_op = O_hi16; | |
3441 | else if (op->typ == OP_OPERAND_LOW16U) | |
3442 | targ->tok[op_num].X_op = O_lo16; | |
3443 | else | |
3444 | return FALSE; | |
3445 | } | |
3446 | } | |
3447 | break; | |
e0001a05 NC |
3448 | default: |
3449 | /* currently handles: | |
3450 | OP_OPERAND_LOW8 | |
3451 | OP_OPERAND_HI24S | |
3452 | OP_OPERAND_F32MINUS */ | |
3453 | if (xg_has_userdef_op_fn (op->typ)) | |
3454 | { | |
9c2799c2 | 3455 | gas_assert (op_data < insn->ntok); |
e0001a05 NC |
3456 | if (expr_is_const (&insn->tok[op_data])) |
3457 | { | |
3458 | long val; | |
3459 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3460 | val = xg_apply_userdef_op_fn (op->typ, | |
3461 | targ->tok[op_num]. | |
3462 | X_add_number); | |
3463 | targ->tok[op_num].X_add_number = val; | |
3464 | } | |
3465 | else | |
3466 | return FALSE; /* We cannot use a relocation for this. */ | |
3467 | break; | |
3468 | } | |
9c2799c2 | 3469 | gas_assert (0); |
e0001a05 NC |
3470 | break; |
3471 | } | |
3472 | } | |
3473 | break; | |
3474 | ||
3475 | case INSTR_LITERAL_DEF: | |
3476 | op = bi->ops; | |
3477 | targ->opcode = XTENSA_UNDEFINED; | |
3478 | targ->insn_type = ITYPE_LITERAL; | |
3479 | targ->is_specific_opcode = FALSE; | |
3480 | for (; op != NULL; op = op->next) | |
3481 | { | |
3482 | int op_num = op->op_num; | |
3483 | int op_data = op->op_data; | |
9c2799c2 | 3484 | gas_assert (op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3485 | |
3486 | if (targ->ntok <= op_num) | |
3487 | targ->ntok = op_num + 1; | |
3488 | ||
3489 | switch (op->typ) | |
3490 | { | |
3491 | case OP_OPERAND: | |
9c2799c2 | 3492 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3493 | /* We can only pass resolvable literals through. */ |
3494 | if (!xg_valid_literal_expression (&insn->tok[op_data])) | |
3495 | return FALSE; | |
e0001a05 NC |
3496 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); |
3497 | break; | |
3498 | case OP_LITERAL: | |
3499 | case OP_CONSTANT: | |
3500 | case OP_LABEL: | |
3501 | default: | |
9c2799c2 | 3502 | gas_assert (0); |
e0001a05 NC |
3503 | break; |
3504 | } | |
3505 | } | |
3506 | break; | |
3507 | ||
3508 | case INSTR_LABEL_DEF: | |
3509 | op = bi->ops; | |
3510 | targ->opcode = XTENSA_UNDEFINED; | |
3511 | targ->insn_type = ITYPE_LABEL; | |
3512 | targ->is_specific_opcode = FALSE; | |
43cd72b9 | 3513 | /* Literal with no ops is a label? */ |
9c2799c2 | 3514 | gas_assert (op == NULL); |
e0001a05 NC |
3515 | break; |
3516 | ||
3517 | default: | |
9c2799c2 | 3518 | gas_assert (0); |
e0001a05 NC |
3519 | } |
3520 | ||
3521 | return TRUE; | |
3522 | } | |
3523 | ||
3524 | ||
43cd72b9 | 3525 | /* Return TRUE on success. */ |
e0001a05 | 3526 | |
7fa3d080 BW |
3527 | static bfd_boolean |
3528 | xg_build_to_stack (IStack *istack, TInsn *insn, BuildInstr *bi) | |
e0001a05 NC |
3529 | { |
3530 | for (; bi != NULL; bi = bi->next) | |
3531 | { | |
3532 | TInsn *next_insn = istack_push_space (istack); | |
3533 | ||
3534 | if (!xg_build_to_insn (next_insn, insn, bi)) | |
3535 | return FALSE; | |
3536 | } | |
3537 | return TRUE; | |
3538 | } | |
3539 | ||
3540 | ||
43cd72b9 | 3541 | /* Return TRUE on valid expansion. */ |
e0001a05 | 3542 | |
7fa3d080 BW |
3543 | static bfd_boolean |
3544 | xg_expand_to_stack (IStack *istack, TInsn *insn, int lateral_steps) | |
e0001a05 NC |
3545 | { |
3546 | int stack_size = istack->ninsn; | |
3547 | int steps_taken = 0; | |
43cd72b9 | 3548 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); |
e0001a05 NC |
3549 | TransitionList *l; |
3550 | ||
9c2799c2 NC |
3551 | gas_assert (insn->insn_type == ITYPE_INSN); |
3552 | gas_assert (insn->opcode < table->num_opcodes); | |
e0001a05 NC |
3553 | |
3554 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3555 | { | |
3556 | TransitionRule *rule = l->rule; | |
3557 | ||
3558 | if (xg_instruction_matches_rule (insn, rule)) | |
3559 | { | |
3560 | if (lateral_steps == steps_taken) | |
3561 | { | |
3562 | int i; | |
3563 | ||
3564 | /* This is it. Expand the rule to the stack. */ | |
3565 | if (!xg_build_to_stack (istack, insn, rule->to_instr)) | |
3566 | return FALSE; | |
3567 | ||
3568 | /* Check to see if it fits. */ | |
3569 | for (i = stack_size; i < istack->ninsn; i++) | |
3570 | { | |
3571 | TInsn *insn = &istack->insn[i]; | |
3572 | ||
3573 | if (insn->insn_type == ITYPE_INSN | |
3574 | && !tinsn_has_symbolic_operands (insn) | |
3575 | && !xg_immeds_fit (insn)) | |
3576 | { | |
3577 | istack->ninsn = stack_size; | |
3578 | return FALSE; | |
3579 | } | |
3580 | } | |
3581 | return TRUE; | |
3582 | } | |
3583 | steps_taken++; | |
3584 | } | |
3585 | } | |
3586 | return FALSE; | |
3587 | } | |
3588 | ||
43cd72b9 | 3589 | \f |
43cd72b9 | 3590 | /* Relax the assembly instruction at least "min_steps". |
b81bf389 BW |
3591 | Return the number of steps taken. |
3592 | ||
3593 | For relaxation to correctly terminate, every relaxation chain must | |
3594 | terminate in one of two ways: | |
3595 | ||
3596 | 1. If the chain from one instruction to the next consists entirely of | |
3597 | single instructions, then the chain *must* handle all possible | |
3598 | immediates without failing. It must not ever fail because an | |
3599 | immediate is out of range. The MOVI.N -> MOVI -> L32R relaxation | |
3600 | chain is one example. L32R loads 32 bits, and there cannot be an | |
3601 | immediate larger than 32 bits, so it satisfies this condition. | |
3602 | Single instruction relaxation chains are as defined by | |
3603 | xg_is_single_relaxable_instruction. | |
3604 | ||
3605 | 2. Otherwise, the chain must end in a multi-instruction expansion: e.g., | |
3606 | BNEZ.N -> BNEZ -> BNEZ.W15 -> BENZ.N/J | |
3607 | ||
3608 | Strictly speaking, in most cases you can violate condition 1 and be OK | |
3609 | -- in particular when the last two instructions have the same single | |
3610 | size. But nevertheless, you should guarantee the above two conditions. | |
3611 | ||
3612 | We could fix this so that single-instruction expansions correctly | |
3613 | terminate when they can't handle the range, but the error messages are | |
3614 | worse, and it actually turns out that in every case but one (18-bit wide | |
3615 | branches), you need a multi-instruction expansion to get the full range | |
3616 | anyway. And because 18-bit branches are handled identically to 15-bit | |
3617 | branches, there isn't any point in changing it. */ | |
e0001a05 | 3618 | |
7fa3d080 BW |
3619 | static int |
3620 | xg_assembly_relax (IStack *istack, | |
3621 | TInsn *insn, | |
3622 | segT pc_seg, | |
3623 | fragS *pc_frag, /* if pc_frag == 0, not pc-relative */ | |
3624 | offsetT pc_offset, /* offset in fragment */ | |
3625 | int min_steps, /* minimum conversion steps */ | |
3626 | long stretch) /* number of bytes stretched so far */ | |
e0001a05 NC |
3627 | { |
3628 | int steps_taken = 0; | |
3629 | ||
b81bf389 BW |
3630 | /* Some of its immeds don't fit. Try to build a relaxed version. |
3631 | This may go through a couple of stages of single instruction | |
3632 | transformations before we get there. */ | |
e0001a05 NC |
3633 | |
3634 | TInsn single_target; | |
3635 | TInsn current_insn; | |
3636 | int lateral_steps = 0; | |
3637 | int istack_size = istack->ninsn; | |
3638 | ||
3639 | if (xg_symbolic_immeds_fit (insn, pc_seg, pc_frag, pc_offset, stretch) | |
3640 | && steps_taken >= min_steps) | |
3641 | { | |
3642 | istack_push (istack, insn); | |
3643 | return steps_taken; | |
3644 | } | |
43cd72b9 | 3645 | current_insn = *insn; |
e0001a05 | 3646 | |
7c834684 | 3647 | /* Walk through all of the single instruction expansions. */ |
84b08ed9 | 3648 | while (xg_is_single_relaxable_insn (¤t_insn, &single_target, FALSE)) |
e0001a05 | 3649 | { |
21af2bbd | 3650 | steps_taken++; |
e0001a05 NC |
3651 | if (xg_symbolic_immeds_fit (&single_target, pc_seg, pc_frag, pc_offset, |
3652 | stretch)) | |
3653 | { | |
e0001a05 NC |
3654 | if (steps_taken >= min_steps) |
3655 | { | |
3656 | istack_push (istack, &single_target); | |
3657 | return steps_taken; | |
3658 | } | |
3659 | } | |
43cd72b9 | 3660 | current_insn = single_target; |
e0001a05 NC |
3661 | } |
3662 | ||
3663 | /* Now check for a multi-instruction expansion. */ | |
3664 | while (xg_is_relaxable_insn (¤t_insn, lateral_steps)) | |
3665 | { | |
3666 | if (xg_symbolic_immeds_fit (¤t_insn, pc_seg, pc_frag, pc_offset, | |
3667 | stretch)) | |
3668 | { | |
3669 | if (steps_taken >= min_steps) | |
3670 | { | |
3671 | istack_push (istack, ¤t_insn); | |
3672 | return steps_taken; | |
3673 | } | |
3674 | } | |
3675 | steps_taken++; | |
3676 | if (xg_expand_to_stack (istack, ¤t_insn, lateral_steps)) | |
3677 | { | |
3678 | if (steps_taken >= min_steps) | |
3679 | return steps_taken; | |
3680 | } | |
3681 | lateral_steps++; | |
3682 | istack->ninsn = istack_size; | |
3683 | } | |
3684 | ||
3685 | /* It's not going to work -- use the original. */ | |
3686 | istack_push (istack, insn); | |
3687 | return steps_taken; | |
3688 | } | |
3689 | ||
3690 | ||
7fa3d080 BW |
3691 | static void |
3692 | xg_finish_frag (char *last_insn, | |
3693 | enum xtensa_relax_statesE frag_state, | |
3694 | enum xtensa_relax_statesE slot0_state, | |
3695 | int max_growth, | |
3696 | bfd_boolean is_insn) | |
e0001a05 NC |
3697 | { |
3698 | /* Finish off this fragment so that it has at LEAST the desired | |
3699 | max_growth. If it doesn't fit in this fragment, close this one | |
3700 | and start a new one. In either case, return a pointer to the | |
3701 | beginning of the growth area. */ | |
3702 | ||
3703 | fragS *old_frag; | |
43cd72b9 | 3704 | |
542f8b94 | 3705 | frag_grow (max_growth); |
e0001a05 NC |
3706 | old_frag = frag_now; |
3707 | ||
3708 | frag_now->fr_opcode = last_insn; | |
3709 | if (is_insn) | |
3710 | frag_now->tc_frag_data.is_insn = TRUE; | |
3711 | ||
3712 | frag_var (rs_machine_dependent, max_growth, max_growth, | |
43cd72b9 BW |
3713 | frag_state, frag_now->fr_symbol, frag_now->fr_offset, last_insn); |
3714 | ||
3715 | old_frag->tc_frag_data.slot_subtypes[0] = slot0_state; | |
3716 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
3717 | |
3718 | /* Just to make sure that we did not split it up. */ | |
9c2799c2 | 3719 | gas_assert (old_frag->fr_next == frag_now); |
e0001a05 NC |
3720 | } |
3721 | ||
3722 | ||
7fa3d080 BW |
3723 | /* Return TRUE if the target frag is one of the next non-empty frags. */ |
3724 | ||
3725 | static bfd_boolean | |
3726 | is_next_frag_target (const fragS *fragP, const fragS *target) | |
3727 | { | |
3728 | if (fragP == NULL) | |
3729 | return FALSE; | |
3730 | ||
3731 | for (; fragP; fragP = fragP->fr_next) | |
3732 | { | |
3733 | if (fragP == target) | |
3734 | return TRUE; | |
3735 | if (fragP->fr_fix != 0) | |
3736 | return FALSE; | |
3737 | if (fragP->fr_type == rs_fill && fragP->fr_offset != 0) | |
3738 | return FALSE; | |
3739 | if ((fragP->fr_type == rs_align || fragP->fr_type == rs_align_code) | |
3740 | && ((fragP->fr_address % (1 << fragP->fr_offset)) != 0)) | |
3741 | return FALSE; | |
3742 | if (fragP->fr_type == rs_space) | |
3743 | return FALSE; | |
3744 | } | |
3745 | return FALSE; | |
3746 | } | |
3747 | ||
3748 | ||
e0001a05 | 3749 | static bfd_boolean |
7fa3d080 | 3750 | is_branch_jmp_to_next (TInsn *insn, fragS *fragP) |
e0001a05 NC |
3751 | { |
3752 | xtensa_isa isa = xtensa_default_isa; | |
3753 | int i; | |
43cd72b9 | 3754 | int num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
e0001a05 NC |
3755 | int target_op = -1; |
3756 | symbolS *sym; | |
3757 | fragS *target_frag; | |
3758 | ||
64b607e6 BW |
3759 | if (xtensa_opcode_is_branch (isa, insn->opcode) != 1 |
3760 | && xtensa_opcode_is_jump (isa, insn->opcode) != 1) | |
e0001a05 NC |
3761 | return FALSE; |
3762 | ||
3763 | for (i = 0; i < num_ops; i++) | |
3764 | { | |
43cd72b9 | 3765 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1) |
e0001a05 NC |
3766 | { |
3767 | target_op = i; | |
3768 | break; | |
3769 | } | |
3770 | } | |
3771 | if (target_op == -1) | |
3772 | return FALSE; | |
3773 | ||
3774 | if (insn->ntok <= target_op) | |
3775 | return FALSE; | |
3776 | ||
3777 | if (insn->tok[target_op].X_op != O_symbol) | |
3778 | return FALSE; | |
3779 | ||
3780 | sym = insn->tok[target_op].X_add_symbol; | |
3781 | if (sym == NULL) | |
3782 | return FALSE; | |
3783 | ||
3784 | if (insn->tok[target_op].X_add_number != 0) | |
3785 | return FALSE; | |
3786 | ||
3787 | target_frag = symbol_get_frag (sym); | |
3788 | if (target_frag == NULL) | |
3789 | return FALSE; | |
3790 | ||
c138bc38 | 3791 | if (is_next_frag_target (fragP->fr_next, target_frag) |
e0001a05 NC |
3792 | && S_GET_VALUE (sym) == target_frag->fr_address) |
3793 | return TRUE; | |
3794 | ||
3795 | return FALSE; | |
3796 | } | |
3797 | ||
3798 | ||
3799 | static void | |
7fa3d080 | 3800 | xg_add_branch_and_loop_targets (TInsn *insn) |
e0001a05 NC |
3801 | { |
3802 | xtensa_isa isa = xtensa_default_isa; | |
7fa3d080 | 3803 | int num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
43cd72b9 | 3804 | |
7fa3d080 BW |
3805 | if (xtensa_opcode_is_loop (isa, insn->opcode) == 1) |
3806 | { | |
3807 | int i = 1; | |
3808 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1 | |
3809 | && insn->tok[i].X_op == O_symbol) | |
3810 | symbol_get_tc (insn->tok[i].X_add_symbol)->is_loop_target = TRUE; | |
3811 | return; | |
3812 | } | |
e0001a05 | 3813 | |
7fa3d080 BW |
3814 | if (xtensa_opcode_is_branch (isa, insn->opcode) == 1 |
3815 | || xtensa_opcode_is_loop (isa, insn->opcode) == 1) | |
e0001a05 | 3816 | { |
7fa3d080 BW |
3817 | int i; |
3818 | ||
3819 | for (i = 0; i < insn->ntok && i < num_ops; i++) | |
3820 | { | |
3821 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1 | |
3822 | && insn->tok[i].X_op == O_symbol) | |
3823 | { | |
3824 | symbolS *sym = insn->tok[i].X_add_symbol; | |
3825 | symbol_get_tc (sym)->is_branch_target = TRUE; | |
3826 | if (S_IS_DEFINED (sym)) | |
3827 | symbol_get_frag (sym)->tc_frag_data.is_branch_target = TRUE; | |
3828 | } | |
3829 | } | |
e0001a05 | 3830 | } |
e0001a05 NC |
3831 | } |
3832 | ||
3833 | ||
43cd72b9 | 3834 | /* Return FALSE if no error. */ |
e0001a05 | 3835 | |
7fa3d080 BW |
3836 | static bfd_boolean |
3837 | xg_build_token_insn (BuildInstr *instr_spec, TInsn *old_insn, TInsn *new_insn) | |
e0001a05 NC |
3838 | { |
3839 | int num_ops = 0; | |
3840 | BuildOp *b_op; | |
3841 | ||
3842 | switch (instr_spec->typ) | |
3843 | { | |
3844 | case INSTR_INSTR: | |
3845 | new_insn->insn_type = ITYPE_INSN; | |
3846 | new_insn->opcode = instr_spec->opcode; | |
e0001a05 NC |
3847 | break; |
3848 | case INSTR_LITERAL_DEF: | |
3849 | new_insn->insn_type = ITYPE_LITERAL; | |
3850 | new_insn->opcode = XTENSA_UNDEFINED; | |
e0001a05 NC |
3851 | break; |
3852 | case INSTR_LABEL_DEF: | |
b224e962 | 3853 | abort (); |
e0001a05 | 3854 | } |
b224e962 BW |
3855 | new_insn->is_specific_opcode = FALSE; |
3856 | new_insn->debug_line = old_insn->debug_line; | |
3857 | new_insn->loc_directive_seen = old_insn->loc_directive_seen; | |
e0001a05 NC |
3858 | |
3859 | for (b_op = instr_spec->ops; b_op != NULL; b_op = b_op->next) | |
3860 | { | |
3861 | expressionS *exp; | |
3862 | const expressionS *src_exp; | |
3863 | ||
3864 | num_ops++; | |
3865 | switch (b_op->typ) | |
3866 | { | |
3867 | case OP_CONSTANT: | |
3868 | /* The expression must be the constant. */ | |
9c2799c2 | 3869 | gas_assert (b_op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3870 | exp = &new_insn->tok[b_op->op_num]; |
3871 | set_expr_const (exp, b_op->op_data); | |
3872 | break; | |
3873 | ||
3874 | case OP_OPERAND: | |
9c2799c2 NC |
3875 | gas_assert (b_op->op_num < MAX_INSN_ARGS); |
3876 | gas_assert (b_op->op_data < (unsigned) old_insn->ntok); | |
e0001a05 NC |
3877 | src_exp = &old_insn->tok[b_op->op_data]; |
3878 | exp = &new_insn->tok[b_op->op_num]; | |
3879 | copy_expr (exp, src_exp); | |
3880 | break; | |
3881 | ||
3882 | case OP_LITERAL: | |
3883 | case OP_LABEL: | |
3884 | as_bad (_("can't handle generation of literal/labels yet")); | |
9c2799c2 | 3885 | gas_assert (0); |
e0001a05 NC |
3886 | |
3887 | default: | |
3888 | as_bad (_("can't handle undefined OP TYPE")); | |
9c2799c2 | 3889 | gas_assert (0); |
e0001a05 NC |
3890 | } |
3891 | } | |
3892 | ||
3893 | new_insn->ntok = num_ops; | |
3894 | return FALSE; | |
3895 | } | |
3896 | ||
3897 | ||
43cd72b9 | 3898 | /* Return TRUE if it was simplified. */ |
e0001a05 | 3899 | |
7fa3d080 BW |
3900 | static bfd_boolean |
3901 | xg_simplify_insn (TInsn *old_insn, TInsn *new_insn) | |
e0001a05 | 3902 | { |
43cd72b9 | 3903 | TransitionRule *rule; |
e0001a05 | 3904 | BuildInstr *insn_spec; |
43cd72b9 BW |
3905 | |
3906 | if (old_insn->is_specific_opcode || !density_supported) | |
3907 | return FALSE; | |
3908 | ||
3909 | rule = xg_instruction_match (old_insn); | |
e0001a05 NC |
3910 | if (rule == NULL) |
3911 | return FALSE; | |
3912 | ||
3913 | insn_spec = rule->to_instr; | |
3914 | /* There should only be one. */ | |
9c2799c2 NC |
3915 | gas_assert (insn_spec != NULL); |
3916 | gas_assert (insn_spec->next == NULL); | |
e0001a05 NC |
3917 | if (insn_spec->next != NULL) |
3918 | return FALSE; | |
3919 | ||
3920 | xg_build_token_insn (insn_spec, old_insn, new_insn); | |
3921 | ||
3922 | return TRUE; | |
3923 | } | |
3924 | ||
3925 | ||
3926 | /* xg_expand_assembly_insn: (1) Simplify the instruction, i.e., l32i -> | |
3927 | l32i.n. (2) Check the number of operands. (3) Place the instruction | |
7c834684 BW |
3928 | tokens into the stack or relax it and place multiple |
3929 | instructions/literals onto the stack. Return FALSE if no error. */ | |
e0001a05 NC |
3930 | |
3931 | static bfd_boolean | |
7fa3d080 | 3932 | xg_expand_assembly_insn (IStack *istack, TInsn *orig_insn) |
e0001a05 NC |
3933 | { |
3934 | int noperands; | |
3935 | TInsn new_insn; | |
7c834684 BW |
3936 | bfd_boolean do_expand; |
3937 | ||
60242db2 | 3938 | tinsn_init (&new_insn); |
e0001a05 | 3939 | |
43cd72b9 BW |
3940 | /* Narrow it if we can. xg_simplify_insn now does all the |
3941 | appropriate checking (e.g., for the density option). */ | |
3942 | if (xg_simplify_insn (orig_insn, &new_insn)) | |
3943 | orig_insn = &new_insn; | |
e0001a05 | 3944 | |
43cd72b9 BW |
3945 | noperands = xtensa_opcode_num_operands (xtensa_default_isa, |
3946 | orig_insn->opcode); | |
e0001a05 NC |
3947 | if (orig_insn->ntok < noperands) |
3948 | { | |
3949 | as_bad (_("found %d operands for '%s': Expected %d"), | |
3950 | orig_insn->ntok, | |
3951 | xtensa_opcode_name (xtensa_default_isa, orig_insn->opcode), | |
3952 | noperands); | |
3953 | return TRUE; | |
3954 | } | |
3955 | if (orig_insn->ntok > noperands) | |
3956 | as_warn (_("found too many (%d) operands for '%s': Expected %d"), | |
3957 | orig_insn->ntok, | |
3958 | xtensa_opcode_name (xtensa_default_isa, orig_insn->opcode), | |
3959 | noperands); | |
3960 | ||
43cd72b9 | 3961 | /* If there are not enough operands, we will assert above. If there |
e0001a05 | 3962 | are too many, just cut out the extras here. */ |
e0001a05 NC |
3963 | orig_insn->ntok = noperands; |
3964 | ||
e0001a05 NC |
3965 | if (tinsn_has_invalid_symbolic_operands (orig_insn)) |
3966 | return TRUE; | |
3967 | ||
d12f9798 BW |
3968 | /* Special case for extui opcode which has constraints not handled |
3969 | by the ordinary operand encoding checks. The number of operands | |
3970 | and related syntax issues have already been checked. */ | |
3971 | if (orig_insn->opcode == xtensa_extui_opcode) | |
3972 | { | |
3973 | int shiftimm = orig_insn->tok[2].X_add_number; | |
3974 | int maskimm = orig_insn->tok[3].X_add_number; | |
3975 | if (shiftimm + maskimm > 32) | |
3976 | { | |
3977 | as_bad (_("immediate operands sum to greater than 32")); | |
3978 | return TRUE; | |
3979 | } | |
3980 | } | |
3981 | ||
7c834684 BW |
3982 | /* If the instruction will definitely need to be relaxed, it is better |
3983 | to expand it now for better scheduling. Decide whether to expand | |
3984 | now.... */ | |
3985 | do_expand = (!orig_insn->is_specific_opcode && use_transform ()); | |
3986 | ||
3987 | /* Calls should be expanded to longcalls only in the backend relaxation | |
3988 | so that the assembly scheduler will keep the L32R/CALLX instructions | |
3989 | adjacent. */ | |
3990 | if (is_direct_call_opcode (orig_insn->opcode)) | |
3991 | do_expand = FALSE; | |
e0001a05 NC |
3992 | |
3993 | if (tinsn_has_symbolic_operands (orig_insn)) | |
3994 | { | |
7c834684 BW |
3995 | /* The values of symbolic operands are not known yet, so only expand |
3996 | now if an operand is "complex" (e.g., difference of symbols) and | |
3997 | will have to be stored as a literal regardless of the value. */ | |
3998 | if (!tinsn_has_complex_operands (orig_insn)) | |
3999 | do_expand = FALSE; | |
e0001a05 | 4000 | } |
7c834684 BW |
4001 | else if (xg_immeds_fit (orig_insn)) |
4002 | do_expand = FALSE; | |
4003 | ||
4004 | if (do_expand) | |
4005 | xg_assembly_relax (istack, orig_insn, 0, 0, 0, 0, 0); | |
e0001a05 | 4006 | else |
7c834684 | 4007 | istack_push (istack, orig_insn); |
e0001a05 | 4008 | |
e0001a05 NC |
4009 | return FALSE; |
4010 | } | |
4011 | ||
4012 | ||
7fa3d080 | 4013 | /* Return TRUE if the section flags are marked linkonce |
74869ac7 BW |
4014 | or the name is .gnu.linkonce.*. */ |
4015 | ||
4016 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; | |
7fa3d080 BW |
4017 | |
4018 | static bfd_boolean | |
4019 | get_is_linkonce_section (bfd *abfd ATTRIBUTE_UNUSED, segT sec) | |
4020 | { | |
4021 | flagword flags, link_once_flags; | |
4022 | ||
4023 | flags = bfd_get_section_flags (abfd, sec); | |
4024 | link_once_flags = (flags & SEC_LINK_ONCE); | |
4025 | ||
4026 | /* Flags might not be set yet. */ | |
74869ac7 BW |
4027 | if (!link_once_flags |
4028 | && strncmp (segment_name (sec), ".gnu.linkonce.", linkonce_len) == 0) | |
4029 | link_once_flags = SEC_LINK_ONCE; | |
7fa3d080 | 4030 | |
7fa3d080 BW |
4031 | return (link_once_flags != 0); |
4032 | } | |
4033 | ||
4034 | ||
4035 | static void | |
4036 | xtensa_add_literal_sym (symbolS *sym) | |
4037 | { | |
4038 | sym_list *l; | |
4039 | ||
4040 | l = (sym_list *) xmalloc (sizeof (sym_list)); | |
4041 | l->sym = sym; | |
4042 | l->next = literal_syms; | |
4043 | literal_syms = l; | |
4044 | } | |
4045 | ||
4046 | ||
4047 | static symbolS * | |
4048 | xtensa_create_literal_symbol (segT sec, fragS *frag) | |
4049 | { | |
4050 | static int lit_num = 0; | |
4051 | static char name[256]; | |
4052 | symbolS *symbolP; | |
4053 | ||
4054 | sprintf (name, ".L_lit_sym%d", lit_num); | |
4055 | ||
4056 | /* Create a local symbol. If it is in a linkonce section, we have to | |
4057 | be careful to make sure that if it is used in a relocation that the | |
4058 | symbol will be in the output file. */ | |
4059 | if (get_is_linkonce_section (stdoutput, sec)) | |
4060 | { | |
4061 | symbolP = symbol_new (name, sec, 0, frag); | |
4062 | S_CLEAR_EXTERNAL (symbolP); | |
4063 | /* symbolP->local = 1; */ | |
4064 | } | |
4065 | else | |
4066 | symbolP = symbol_new (name, sec, 0, frag); | |
4067 | ||
4068 | xtensa_add_literal_sym (symbolP); | |
4069 | ||
7fa3d080 BW |
4070 | lit_num++; |
4071 | return symbolP; | |
4072 | } | |
4073 | ||
4074 | ||
e0001a05 NC |
4075 | /* Currently all literals that are generated here are 32-bit L32R targets. */ |
4076 | ||
7fa3d080 BW |
4077 | static symbolS * |
4078 | xg_assemble_literal (/* const */ TInsn *insn) | |
e0001a05 NC |
4079 | { |
4080 | emit_state state; | |
4081 | symbolS *lit_sym = NULL; | |
bbdd25a8 | 4082 | bfd_reloc_code_real_type reloc; |
1bbb5f21 | 4083 | bfd_boolean pcrel = FALSE; |
bbdd25a8 | 4084 | char *p; |
e0001a05 NC |
4085 | |
4086 | /* size = 4 for L32R. It could easily be larger when we move to | |
4087 | larger constants. Add a parameter later. */ | |
4088 | offsetT litsize = 4; | |
4089 | offsetT litalign = 2; /* 2^2 = 4 */ | |
4090 | expressionS saved_loc; | |
43cd72b9 BW |
4091 | expressionS * emit_val; |
4092 | ||
e0001a05 NC |
4093 | set_expr_symbol_offset (&saved_loc, frag_now->fr_symbol, frag_now_fix ()); |
4094 | ||
9c2799c2 NC |
4095 | gas_assert (insn->insn_type == ITYPE_LITERAL); |
4096 | gas_assert (insn->ntok == 1); /* must be only one token here */ | |
e0001a05 NC |
4097 | |
4098 | xtensa_switch_to_literal_fragment (&state); | |
4099 | ||
43cd72b9 BW |
4100 | emit_val = &insn->tok[0]; |
4101 | if (emit_val->X_op == O_big) | |
4102 | { | |
4103 | int size = emit_val->X_add_number * CHARS_PER_LITTLENUM; | |
4104 | if (size > litsize) | |
4105 | { | |
4106 | /* This happens when someone writes a "movi a2, big_number". */ | |
c138bc38 | 4107 | as_bad_where (frag_now->fr_file, frag_now->fr_line, |
43cd72b9 BW |
4108 | _("invalid immediate")); |
4109 | xtensa_restore_emit_state (&state); | |
4110 | return NULL; | |
4111 | } | |
4112 | } | |
4113 | ||
e0001a05 NC |
4114 | /* Force a 4-byte align here. Note that this opens a new frag, so all |
4115 | literals done with this function have a frag to themselves. That's | |
4116 | important for the way text section literals work. */ | |
4117 | frag_align (litalign, 0, 0); | |
43cd72b9 | 4118 | record_alignment (now_seg, litalign); |
e0001a05 | 4119 | |
bbdd25a8 | 4120 | switch (emit_val->X_op) |
43cd72b9 | 4121 | { |
1bbb5f21 BW |
4122 | case O_pcrel: |
4123 | pcrel = TRUE; | |
4124 | /* fall through */ | |
bbdd25a8 | 4125 | case O_pltrel: |
28dbbc02 BW |
4126 | case O_tlsfunc: |
4127 | case O_tlsarg: | |
4128 | case O_tpoff: | |
4129 | case O_dtpoff: | |
bbdd25a8 | 4130 | p = frag_more (litsize); |
43cd72b9 | 4131 | xtensa_set_frag_assembly_state (frag_now); |
28dbbc02 | 4132 | reloc = map_operator_to_reloc (emit_val->X_op, TRUE); |
43cd72b9 BW |
4133 | if (emit_val->X_add_symbol) |
4134 | emit_val->X_op = O_symbol; | |
4135 | else | |
4136 | emit_val->X_op = O_constant; | |
4137 | fix_new_exp (frag_now, p - frag_now->fr_literal, | |
1bbb5f21 | 4138 | litsize, emit_val, pcrel, reloc); |
bbdd25a8 BW |
4139 | break; |
4140 | ||
4141 | default: | |
4142 | emit_expr (emit_val, litsize); | |
4143 | break; | |
43cd72b9 | 4144 | } |
e0001a05 | 4145 | |
9c2799c2 | 4146 | gas_assert (frag_now->tc_frag_data.literal_frag == NULL); |
e0001a05 NC |
4147 | frag_now->tc_frag_data.literal_frag = get_literal_pool_location (now_seg); |
4148 | frag_now->fr_symbol = xtensa_create_literal_symbol (now_seg, frag_now); | |
4149 | lit_sym = frag_now->fr_symbol; | |
e0001a05 NC |
4150 | |
4151 | /* Go back. */ | |
4152 | xtensa_restore_emit_state (&state); | |
4153 | return lit_sym; | |
4154 | } | |
4155 | ||
4156 | ||
4157 | static void | |
7fa3d080 | 4158 | xg_assemble_literal_space (/* const */ int size, int slot) |
e0001a05 NC |
4159 | { |
4160 | emit_state state; | |
43cd72b9 | 4161 | /* We might have to do something about this alignment. It only |
e0001a05 NC |
4162 | takes effect if something is placed here. */ |
4163 | offsetT litalign = 2; /* 2^2 = 4 */ | |
4164 | fragS *lit_saved_frag; | |
4165 | ||
9c2799c2 | 4166 | gas_assert (size % 4 == 0); |
e0001a05 NC |
4167 | |
4168 | xtensa_switch_to_literal_fragment (&state); | |
4169 | ||
4170 | /* Force a 4-byte align here. */ | |
4171 | frag_align (litalign, 0, 0); | |
43cd72b9 | 4172 | record_alignment (now_seg, litalign); |
e0001a05 | 4173 | |
542f8b94 | 4174 | frag_grow (size); |
e0001a05 NC |
4175 | |
4176 | lit_saved_frag = frag_now; | |
4177 | frag_now->tc_frag_data.literal_frag = get_literal_pool_location (now_seg); | |
e0001a05 | 4178 | frag_now->fr_symbol = xtensa_create_literal_symbol (now_seg, frag_now); |
43cd72b9 | 4179 | xg_finish_frag (0, RELAX_LITERAL, 0, size, FALSE); |
e0001a05 NC |
4180 | |
4181 | /* Go back. */ | |
4182 | xtensa_restore_emit_state (&state); | |
43cd72b9 | 4183 | frag_now->tc_frag_data.literal_frags[slot] = lit_saved_frag; |
e0001a05 NC |
4184 | } |
4185 | ||
4186 | ||
e0001a05 | 4187 | /* Put in a fixup record based on the opcode. |
43cd72b9 | 4188 | Return TRUE on success. */ |
e0001a05 | 4189 | |
7fa3d080 BW |
4190 | static bfd_boolean |
4191 | xg_add_opcode_fix (TInsn *tinsn, | |
4192 | int opnum, | |
4193 | xtensa_format fmt, | |
4194 | int slot, | |
4195 | expressionS *expr, | |
4196 | fragS *fragP, | |
4197 | offsetT offset) | |
43cd72b9 BW |
4198 | { |
4199 | xtensa_opcode opcode = tinsn->opcode; | |
4200 | bfd_reloc_code_real_type reloc; | |
4201 | reloc_howto_type *howto; | |
4202 | int fmt_length; | |
e0001a05 NC |
4203 | fixS *the_fix; |
4204 | ||
43cd72b9 BW |
4205 | reloc = BFD_RELOC_NONE; |
4206 | ||
4207 | /* First try the special cases for "alternate" relocs. */ | |
4208 | if (opcode == xtensa_l32r_opcode) | |
4209 | { | |
4210 | if (fragP->tc_frag_data.use_absolute_literals) | |
4211 | reloc = encode_alt_reloc (slot); | |
4212 | } | |
4213 | else if (opcode == xtensa_const16_opcode) | |
4214 | { | |
4215 | if (expr->X_op == O_lo16) | |
4216 | { | |
4217 | reloc = encode_reloc (slot); | |
4218 | expr->X_op = O_symbol; | |
4219 | } | |
4220 | else if (expr->X_op == O_hi16) | |
4221 | { | |
4222 | reloc = encode_alt_reloc (slot); | |
4223 | expr->X_op = O_symbol; | |
4224 | } | |
4225 | } | |
4226 | ||
4227 | if (opnum != get_relaxable_immed (opcode)) | |
e0001a05 | 4228 | { |
43cd72b9 | 4229 | as_bad (_("invalid relocation for operand %i of '%s'"), |
431ad2d0 | 4230 | opnum + 1, xtensa_opcode_name (xtensa_default_isa, opcode)); |
e0001a05 NC |
4231 | return FALSE; |
4232 | } | |
4233 | ||
43cd72b9 BW |
4234 | /* Handle erroneous "@h" and "@l" expressions here before they propagate |
4235 | into the symbol table where the generic portions of the assembler | |
4236 | won't know what to do with them. */ | |
4237 | if (expr->X_op == O_lo16 || expr->X_op == O_hi16) | |
4238 | { | |
4239 | as_bad (_("invalid expression for operand %i of '%s'"), | |
431ad2d0 | 4240 | opnum + 1, xtensa_opcode_name (xtensa_default_isa, opcode)); |
43cd72b9 BW |
4241 | return FALSE; |
4242 | } | |
4243 | ||
4244 | /* Next try the generic relocs. */ | |
4245 | if (reloc == BFD_RELOC_NONE) | |
4246 | reloc = encode_reloc (slot); | |
4247 | if (reloc == BFD_RELOC_NONE) | |
4248 | { | |
4249 | as_bad (_("invalid relocation in instruction slot %i"), slot); | |
4250 | return FALSE; | |
4251 | } | |
e0001a05 | 4252 | |
43cd72b9 | 4253 | howto = bfd_reloc_type_lookup (stdoutput, reloc); |
e0001a05 NC |
4254 | if (!howto) |
4255 | { | |
43cd72b9 | 4256 | as_bad (_("undefined symbol for opcode \"%s\""), |
e0001a05 NC |
4257 | xtensa_opcode_name (xtensa_default_isa, opcode)); |
4258 | return FALSE; | |
4259 | } | |
4260 | ||
43cd72b9 BW |
4261 | fmt_length = xtensa_format_length (xtensa_default_isa, fmt); |
4262 | the_fix = fix_new_exp (fragP, offset, fmt_length, expr, | |
e0001a05 | 4263 | howto->pc_relative, reloc); |
d9740523 | 4264 | the_fix->fx_no_overflow = 1; |
7fa3d080 BW |
4265 | the_fix->tc_fix_data.X_add_symbol = expr->X_add_symbol; |
4266 | the_fix->tc_fix_data.X_add_number = expr->X_add_number; | |
4267 | the_fix->tc_fix_data.slot = slot; | |
c138bc38 | 4268 | |
7fa3d080 BW |
4269 | return TRUE; |
4270 | } | |
4271 | ||
4272 | ||
4273 | static bfd_boolean | |
4274 | xg_emit_insn_to_buf (TInsn *tinsn, | |
7fa3d080 BW |
4275 | char *buf, |
4276 | fragS *fragP, | |
4277 | offsetT offset, | |
4278 | bfd_boolean build_fix) | |
4279 | { | |
4280 | static xtensa_insnbuf insnbuf = NULL; | |
4281 | bfd_boolean has_symbolic_immed = FALSE; | |
4282 | bfd_boolean ok = TRUE; | |
b2d179be | 4283 | |
7fa3d080 BW |
4284 | if (!insnbuf) |
4285 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
4286 | ||
4287 | has_symbolic_immed = tinsn_to_insnbuf (tinsn, insnbuf); | |
4288 | if (has_symbolic_immed && build_fix) | |
4289 | { | |
4290 | /* Add a fixup. */ | |
b2d179be BW |
4291 | xtensa_format fmt = xg_get_single_format (tinsn->opcode); |
4292 | int slot = xg_get_single_slot (tinsn->opcode); | |
7fa3d080 BW |
4293 | int opnum = get_relaxable_immed (tinsn->opcode); |
4294 | expressionS *exp = &tinsn->tok[opnum]; | |
43cd72b9 | 4295 | |
b2d179be | 4296 | if (!xg_add_opcode_fix (tinsn, opnum, fmt, slot, exp, fragP, offset)) |
7fa3d080 BW |
4297 | ok = FALSE; |
4298 | } | |
4299 | fragP->tc_frag_data.is_insn = TRUE; | |
d77b99c9 BW |
4300 | xtensa_insnbuf_to_chars (xtensa_default_isa, insnbuf, |
4301 | (unsigned char *) buf, 0); | |
7fa3d080 | 4302 | return ok; |
e0001a05 NC |
4303 | } |
4304 | ||
4305 | ||
7fa3d080 BW |
4306 | static void |
4307 | xg_resolve_literals (TInsn *insn, symbolS *lit_sym) | |
e0001a05 NC |
4308 | { |
4309 | symbolS *sym = get_special_literal_symbol (); | |
4310 | int i; | |
4311 | if (lit_sym == 0) | |
4312 | return; | |
9c2799c2 | 4313 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
4314 | for (i = 0; i < insn->ntok; i++) |
4315 | if (insn->tok[i].X_add_symbol == sym) | |
4316 | insn->tok[i].X_add_symbol = lit_sym; | |
4317 | ||
4318 | } | |
4319 | ||
4320 | ||
7fa3d080 BW |
4321 | static void |
4322 | xg_resolve_labels (TInsn *insn, symbolS *label_sym) | |
e0001a05 NC |
4323 | { |
4324 | symbolS *sym = get_special_label_symbol (); | |
4325 | int i; | |
e0001a05 NC |
4326 | for (i = 0; i < insn->ntok; i++) |
4327 | if (insn->tok[i].X_add_symbol == sym) | |
4328 | insn->tok[i].X_add_symbol = label_sym; | |
4329 | ||
4330 | } | |
4331 | ||
4332 | ||
43cd72b9 | 4333 | /* Return TRUE if the instruction can write to the specified |
e0001a05 NC |
4334 | integer register. */ |
4335 | ||
4336 | static bfd_boolean | |
7fa3d080 | 4337 | is_register_writer (const TInsn *insn, const char *regset, int regnum) |
e0001a05 NC |
4338 | { |
4339 | int i; | |
4340 | int num_ops; | |
4341 | xtensa_isa isa = xtensa_default_isa; | |
4342 | ||
43cd72b9 | 4343 | num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
e0001a05 NC |
4344 | |
4345 | for (i = 0; i < num_ops; i++) | |
4346 | { | |
43cd72b9 BW |
4347 | char inout; |
4348 | inout = xtensa_operand_inout (isa, insn->opcode, i); | |
4349 | if ((inout == 'o' || inout == 'm') | |
4350 | && xtensa_operand_is_register (isa, insn->opcode, i) == 1) | |
e0001a05 | 4351 | { |
43cd72b9 BW |
4352 | xtensa_regfile opnd_rf = |
4353 | xtensa_operand_regfile (isa, insn->opcode, i); | |
4354 | if (!strcmp (xtensa_regfile_shortname (isa, opnd_rf), regset)) | |
e0001a05 NC |
4355 | { |
4356 | if ((insn->tok[i].X_op == O_register) | |
4357 | && (insn->tok[i].X_add_number == regnum)) | |
4358 | return TRUE; | |
4359 | } | |
4360 | } | |
4361 | } | |
4362 | return FALSE; | |
4363 | } | |
4364 | ||
4365 | ||
4366 | static bfd_boolean | |
7fa3d080 | 4367 | is_bad_loopend_opcode (const TInsn *tinsn) |
e0001a05 NC |
4368 | { |
4369 | xtensa_opcode opcode = tinsn->opcode; | |
4370 | ||
4371 | if (opcode == XTENSA_UNDEFINED) | |
4372 | return FALSE; | |
4373 | ||
4374 | if (opcode == xtensa_call0_opcode | |
4375 | || opcode == xtensa_callx0_opcode | |
4376 | || opcode == xtensa_call4_opcode | |
4377 | || opcode == xtensa_callx4_opcode | |
4378 | || opcode == xtensa_call8_opcode | |
4379 | || opcode == xtensa_callx8_opcode | |
4380 | || opcode == xtensa_call12_opcode | |
4381 | || opcode == xtensa_callx12_opcode | |
4382 | || opcode == xtensa_isync_opcode | |
4383 | || opcode == xtensa_ret_opcode | |
4384 | || opcode == xtensa_ret_n_opcode | |
4385 | || opcode == xtensa_retw_opcode | |
4386 | || opcode == xtensa_retw_n_opcode | |
43cd72b9 BW |
4387 | || opcode == xtensa_waiti_opcode |
4388 | || opcode == xtensa_rsr_lcount_opcode) | |
e0001a05 | 4389 | return TRUE; |
c138bc38 | 4390 | |
e0001a05 NC |
4391 | return FALSE; |
4392 | } | |
4393 | ||
4394 | ||
4395 | /* Labels that begin with ".Ln" or ".LM" are unaligned. | |
4396 | This allows the debugger to add unaligned labels. | |
4397 | Also, the assembler generates stabs labels that need | |
4398 | not be aligned: FAKE_LABEL_NAME . {"F", "L", "endfunc"}. */ | |
4399 | ||
7fa3d080 BW |
4400 | static bfd_boolean |
4401 | is_unaligned_label (symbolS *sym) | |
e0001a05 NC |
4402 | { |
4403 | const char *name = S_GET_NAME (sym); | |
4404 | static size_t fake_size = 0; | |
4405 | ||
4406 | if (name | |
4407 | && name[0] == '.' | |
4408 | && name[1] == 'L' && (name[2] == 'n' || name[2] == 'M')) | |
4409 | return TRUE; | |
4410 | ||
4411 | /* FAKE_LABEL_NAME followed by "F", "L" or "endfunc" */ | |
4412 | if (fake_size == 0) | |
4413 | fake_size = strlen (FAKE_LABEL_NAME); | |
4414 | ||
43cd72b9 | 4415 | if (name |
e0001a05 NC |
4416 | && strncmp (FAKE_LABEL_NAME, name, fake_size) == 0 |
4417 | && (name[fake_size] == 'F' | |
4418 | || name[fake_size] == 'L' | |
4419 | || (name[fake_size] == 'e' | |
4420 | && strncmp ("endfunc", name+fake_size, 7) == 0))) | |
4421 | return TRUE; | |
4422 | ||
4423 | return FALSE; | |
4424 | } | |
4425 | ||
4426 | ||
7fa3d080 BW |
4427 | static fragS * |
4428 | next_non_empty_frag (const fragS *fragP) | |
e0001a05 NC |
4429 | { |
4430 | fragS *next_fragP = fragP->fr_next; | |
4431 | ||
c138bc38 | 4432 | /* Sometimes an empty will end up here due storage allocation issues. |
e0001a05 NC |
4433 | So we have to skip until we find something legit. */ |
4434 | while (next_fragP && next_fragP->fr_fix == 0) | |
4435 | next_fragP = next_fragP->fr_next; | |
4436 | ||
4437 | if (next_fragP == NULL || next_fragP->fr_fix == 0) | |
4438 | return NULL; | |
4439 | ||
4440 | return next_fragP; | |
4441 | } | |
4442 | ||
4443 | ||
43cd72b9 | 4444 | static bfd_boolean |
7fa3d080 | 4445 | next_frag_opcode_is_loop (const fragS *fragP, xtensa_opcode *opcode) |
43cd72b9 BW |
4446 | { |
4447 | xtensa_opcode out_opcode; | |
4448 | const fragS *next_fragP = next_non_empty_frag (fragP); | |
4449 | ||
4450 | if (next_fragP == NULL) | |
4451 | return FALSE; | |
4452 | ||
4453 | out_opcode = get_opcode_from_buf (next_fragP->fr_literal, 0); | |
4454 | if (xtensa_opcode_is_loop (xtensa_default_isa, out_opcode) == 1) | |
4455 | { | |
4456 | *opcode = out_opcode; | |
4457 | return TRUE; | |
4458 | } | |
4459 | return FALSE; | |
4460 | } | |
4461 | ||
4462 | ||
4463 | static int | |
7fa3d080 | 4464 | frag_format_size (const fragS *fragP) |
43cd72b9 | 4465 | { |
e0001a05 NC |
4466 | static xtensa_insnbuf insnbuf = NULL; |
4467 | xtensa_isa isa = xtensa_default_isa; | |
43cd72b9 | 4468 | xtensa_format fmt; |
c138bc38 | 4469 | int fmt_size; |
e0001a05 NC |
4470 | |
4471 | if (!insnbuf) | |
4472 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4473 | ||
43cd72b9 BW |
4474 | if (fragP == NULL) |
4475 | return XTENSA_UNDEFINED; | |
4476 | ||
d77b99c9 BW |
4477 | xtensa_insnbuf_from_chars (isa, insnbuf, |
4478 | (unsigned char *) fragP->fr_literal, 0); | |
43cd72b9 BW |
4479 | |
4480 | fmt = xtensa_format_decode (isa, insnbuf); | |
4481 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 4482 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
4483 | fmt_size = xtensa_format_length (isa, fmt); |
4484 | ||
4485 | /* If the next format won't be changing due to relaxation, just | |
4486 | return the length of the first format. */ | |
4487 | if (fragP->fr_opcode != fragP->fr_literal) | |
4488 | return fmt_size; | |
4489 | ||
c138bc38 | 4490 | /* If during relaxation we have to pull an instruction out of a |
43cd72b9 BW |
4491 | multi-slot instruction, we will return the more conservative |
4492 | number. This works because alignment on bigger instructions | |
4493 | is more restrictive than alignment on smaller instructions. | |
4494 | This is more conservative than we would like, but it happens | |
4495 | infrequently. */ | |
4496 | ||
4497 | if (xtensa_format_num_slots (xtensa_default_isa, fmt) > 1) | |
4498 | return fmt_size; | |
4499 | ||
4500 | /* If we aren't doing one of our own relaxations or it isn't | |
4501 | slot-based, then the insn size won't change. */ | |
4502 | if (fragP->fr_type != rs_machine_dependent) | |
4503 | return fmt_size; | |
4504 | if (fragP->fr_subtype != RELAX_SLOTS) | |
4505 | return fmt_size; | |
4506 | ||
4507 | /* If an instruction is about to grow, return the longer size. */ | |
4508 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP1 | |
b81bf389 BW |
4509 | || fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP2 |
4510 | || fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP3) | |
def13efb BW |
4511 | { |
4512 | /* For most frags at RELAX_IMMED_STEPX, with X > 0, the first | |
4513 | instruction in the relaxed version is of length 3. (The case | |
4514 | where we have to pull the instruction out of a FLIX bundle | |
4515 | is handled conservatively above.) However, frags with opcodes | |
4516 | that are expanding to wide branches end up having formats that | |
4517 | are not determinable by the RELAX_IMMED_STEPX enumeration, and | |
4518 | we can't tell directly what format the relaxer picked. This | |
4519 | is a wart in the design of the relaxer that should someday be | |
4520 | fixed, but would require major changes, or at least should | |
4521 | be accompanied by major changes to make use of that data. | |
4522 | ||
4523 | In any event, we can tell that we are expanding from a single-slot | |
4524 | three-byte format to a wider one with the logic below. */ | |
4525 | ||
4526 | if (fmt_size <= 3 && fragP->tc_frag_data.text_expansion[0] != 3) | |
4527 | return 3 + fragP->tc_frag_data.text_expansion[0]; | |
4528 | else | |
4529 | return 3; | |
4530 | } | |
c138bc38 | 4531 | |
43cd72b9 BW |
4532 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) |
4533 | return 2 + fragP->tc_frag_data.text_expansion[0]; | |
e0001a05 | 4534 | |
43cd72b9 | 4535 | return fmt_size; |
e0001a05 NC |
4536 | } |
4537 | ||
4538 | ||
7fa3d080 BW |
4539 | static int |
4540 | next_frag_format_size (const fragS *fragP) | |
e0001a05 | 4541 | { |
7fa3d080 BW |
4542 | const fragS *next_fragP = next_non_empty_frag (fragP); |
4543 | return frag_format_size (next_fragP); | |
e0001a05 NC |
4544 | } |
4545 | ||
4546 | ||
03aaa593 BW |
4547 | /* In early Xtensa Processors, for reasons that are unclear, the ISA |
4548 | required two-byte instructions to be treated as three-byte instructions | |
4549 | for loop instruction alignment. This restriction was removed beginning | |
4550 | with Xtensa LX. Now the only requirement on loop instruction alignment | |
4551 | is that the first instruction of the loop must appear at an address that | |
4552 | does not cross a fetch boundary. */ | |
4553 | ||
4554 | static int | |
4555 | get_loop_align_size (int insn_size) | |
4556 | { | |
4557 | if (insn_size == XTENSA_UNDEFINED) | |
4558 | return xtensa_fetch_width; | |
4559 | ||
4560 | if (enforce_three_byte_loop_align && insn_size == 2) | |
4561 | return 3; | |
4562 | ||
4563 | return insn_size; | |
4564 | } | |
4565 | ||
4566 | ||
e0001a05 NC |
4567 | /* If the next legit fragment is an end-of-loop marker, |
4568 | switch its state so it will instantiate a NOP. */ | |
4569 | ||
4570 | static void | |
1d19a770 | 4571 | update_next_frag_state (fragS *fragP) |
e0001a05 NC |
4572 | { |
4573 | fragS *next_fragP = fragP->fr_next; | |
43cd72b9 | 4574 | fragS *new_target = NULL; |
e0001a05 | 4575 | |
7b1cc377 | 4576 | if (align_targets) |
43cd72b9 BW |
4577 | { |
4578 | /* We are guaranteed there will be one of these... */ | |
4579 | while (!(next_fragP->fr_type == rs_machine_dependent | |
4580 | && (next_fragP->fr_subtype == RELAX_MAYBE_UNREACHABLE | |
4581 | || next_fragP->fr_subtype == RELAX_UNREACHABLE))) | |
4582 | next_fragP = next_fragP->fr_next; | |
4583 | ||
9c2799c2 | 4584 | gas_assert (next_fragP->fr_type == rs_machine_dependent |
43cd72b9 BW |
4585 | && (next_fragP->fr_subtype == RELAX_MAYBE_UNREACHABLE |
4586 | || next_fragP->fr_subtype == RELAX_UNREACHABLE)); | |
4587 | ||
4588 | /* ...and one of these. */ | |
4589 | new_target = next_fragP->fr_next; | |
4590 | while (!(new_target->fr_type == rs_machine_dependent | |
4591 | && (new_target->fr_subtype == RELAX_MAYBE_DESIRE_ALIGN | |
4592 | || new_target->fr_subtype == RELAX_DESIRE_ALIGN))) | |
4593 | new_target = new_target->fr_next; | |
4594 | ||
9c2799c2 | 4595 | gas_assert (new_target->fr_type == rs_machine_dependent |
43cd72b9 BW |
4596 | && (new_target->fr_subtype == RELAX_MAYBE_DESIRE_ALIGN |
4597 | || new_target->fr_subtype == RELAX_DESIRE_ALIGN)); | |
4598 | } | |
43cd72b9 | 4599 | |
1d19a770 | 4600 | while (next_fragP && next_fragP->fr_fix == 0) |
43cd72b9 | 4601 | { |
1d19a770 BW |
4602 | if (next_fragP->fr_type == rs_machine_dependent |
4603 | && next_fragP->fr_subtype == RELAX_LOOP_END) | |
43cd72b9 | 4604 | { |
1d19a770 BW |
4605 | next_fragP->fr_subtype = RELAX_LOOP_END_ADD_NOP; |
4606 | return; | |
e0001a05 | 4607 | } |
1d19a770 BW |
4608 | |
4609 | next_fragP = next_fragP->fr_next; | |
e0001a05 NC |
4610 | } |
4611 | } | |
4612 | ||
4613 | ||
4614 | static bfd_boolean | |
7fa3d080 | 4615 | next_frag_is_branch_target (const fragS *fragP) |
e0001a05 | 4616 | { |
43cd72b9 | 4617 | /* Sometimes an empty will end up here due to storage allocation issues, |
e0001a05 NC |
4618 | so we have to skip until we find something legit. */ |
4619 | for (fragP = fragP->fr_next; fragP; fragP = fragP->fr_next) | |
4620 | { | |
4621 | if (fragP->tc_frag_data.is_branch_target) | |
4622 | return TRUE; | |
4623 | if (fragP->fr_fix != 0) | |
4624 | break; | |
4625 | } | |
4626 | return FALSE; | |
4627 | } | |
4628 | ||
4629 | ||
4630 | static bfd_boolean | |
7fa3d080 | 4631 | next_frag_is_loop_target (const fragS *fragP) |
e0001a05 | 4632 | { |
c138bc38 | 4633 | /* Sometimes an empty will end up here due storage allocation issues. |
e0001a05 NC |
4634 | So we have to skip until we find something legit. */ |
4635 | for (fragP = fragP->fr_next; fragP; fragP = fragP->fr_next) | |
4636 | { | |
4637 | if (fragP->tc_frag_data.is_loop_target) | |
4638 | return TRUE; | |
4639 | if (fragP->fr_fix != 0) | |
4640 | break; | |
4641 | } | |
4642 | return FALSE; | |
4643 | } | |
4644 | ||
4645 | ||
4646 | static addressT | |
7fa3d080 | 4647 | next_frag_pre_opcode_bytes (const fragS *fragp) |
e0001a05 NC |
4648 | { |
4649 | const fragS *next_fragp = fragp->fr_next; | |
43cd72b9 | 4650 | xtensa_opcode next_opcode; |
e0001a05 | 4651 | |
43cd72b9 | 4652 | if (!next_frag_opcode_is_loop (fragp, &next_opcode)) |
e0001a05 NC |
4653 | return 0; |
4654 | ||
43cd72b9 BW |
4655 | /* Sometimes an empty will end up here due to storage allocation issues, |
4656 | so we have to skip until we find something legit. */ | |
e0001a05 NC |
4657 | while (next_fragp->fr_fix == 0) |
4658 | next_fragp = next_fragp->fr_next; | |
4659 | ||
4660 | if (next_fragp->fr_type != rs_machine_dependent) | |
4661 | return 0; | |
4662 | ||
4663 | /* There is some implicit knowledge encoded in here. | |
4664 | The LOOP instructions that are NOT RELAX_IMMED have | |
43cd72b9 BW |
4665 | been relaxed. Note that we can assume that the LOOP |
4666 | instruction is in slot 0 because loops aren't bundleable. */ | |
4667 | if (next_fragp->tc_frag_data.slot_subtypes[0] > RELAX_IMMED) | |
e0001a05 NC |
4668 | return get_expanded_loop_offset (next_opcode); |
4669 | ||
4670 | return 0; | |
4671 | } | |
4672 | ||
4673 | ||
4674 | /* Mark a location where we can later insert literal frags. Update | |
4675 | the section's literal_pool_loc, so subsequent literals can be | |
4676 | placed nearest to their use. */ | |
4677 | ||
4678 | static void | |
7fa3d080 | 4679 | xtensa_mark_literal_pool_location (void) |
e0001a05 NC |
4680 | { |
4681 | /* Any labels pointing to the current location need | |
4682 | to be adjusted to after the literal pool. */ | |
4683 | emit_state s; | |
e0001a05 | 4684 | fragS *pool_location; |
e0001a05 | 4685 | |
1f2a7e38 | 4686 | if (use_literal_section) |
43cd72b9 BW |
4687 | return; |
4688 | ||
dd49a749 BW |
4689 | /* We stash info in these frags so we can later move the literal's |
4690 | fixes into this frchain's fix list. */ | |
e0001a05 | 4691 | pool_location = frag_now; |
dd49a749 | 4692 | frag_now->tc_frag_data.lit_frchain = frchain_now; |
c48aaca0 | 4693 | frag_now->tc_frag_data.literal_frag = frag_now; |
dd49a749 | 4694 | frag_variant (rs_machine_dependent, 0, 0, |
e0001a05 | 4695 | RELAX_LITERAL_POOL_BEGIN, NULL, 0, NULL); |
43cd72b9 | 4696 | xtensa_set_frag_assembly_state (frag_now); |
dd49a749 BW |
4697 | frag_now->tc_frag_data.lit_seg = now_seg; |
4698 | frag_variant (rs_machine_dependent, 0, 0, | |
e0001a05 | 4699 | RELAX_LITERAL_POOL_END, NULL, 0, NULL); |
43cd72b9 | 4700 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
4701 | |
4702 | /* Now put a frag into the literal pool that points to this location. */ | |
4703 | set_literal_pool_location (now_seg, pool_location); | |
43cd72b9 BW |
4704 | xtensa_switch_to_non_abs_literal_fragment (&s); |
4705 | frag_align (2, 0, 0); | |
4706 | record_alignment (now_seg, 2); | |
e0001a05 NC |
4707 | |
4708 | /* Close whatever frag is there. */ | |
4709 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 4710 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
4711 | frag_now->tc_frag_data.literal_frag = pool_location; |
4712 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
4713 | xtensa_restore_emit_state (&s); | |
43cd72b9 | 4714 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
4715 | } |
4716 | ||
4717 | ||
43cd72b9 BW |
4718 | /* Build a nop of the correct size into tinsn. */ |
4719 | ||
4720 | static void | |
7fa3d080 | 4721 | build_nop (TInsn *tinsn, int size) |
43cd72b9 BW |
4722 | { |
4723 | tinsn_init (tinsn); | |
4724 | switch (size) | |
4725 | { | |
4726 | case 2: | |
4727 | tinsn->opcode = xtensa_nop_n_opcode; | |
4728 | tinsn->ntok = 0; | |
4729 | if (tinsn->opcode == XTENSA_UNDEFINED) | |
4730 | as_fatal (_("opcode 'NOP.N' unavailable in this configuration")); | |
4731 | break; | |
4732 | ||
4733 | case 3: | |
4734 | if (xtensa_nop_opcode == XTENSA_UNDEFINED) | |
4735 | { | |
4736 | tinsn->opcode = xtensa_or_opcode; | |
4737 | set_expr_const (&tinsn->tok[0], 1); | |
4738 | set_expr_const (&tinsn->tok[1], 1); | |
4739 | set_expr_const (&tinsn->tok[2], 1); | |
4740 | tinsn->ntok = 3; | |
4741 | } | |
4742 | else | |
4743 | tinsn->opcode = xtensa_nop_opcode; | |
4744 | ||
9c2799c2 | 4745 | gas_assert (tinsn->opcode != XTENSA_UNDEFINED); |
43cd72b9 BW |
4746 | } |
4747 | } | |
4748 | ||
4749 | ||
e0001a05 NC |
4750 | /* Assemble a NOP of the requested size in the buffer. User must have |
4751 | allocated "buf" with at least "size" bytes. */ | |
4752 | ||
7fa3d080 | 4753 | static void |
d77b99c9 | 4754 | assemble_nop (int size, char *buf) |
e0001a05 NC |
4755 | { |
4756 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 4757 | TInsn tinsn; |
e0001a05 | 4758 | |
43cd72b9 | 4759 | build_nop (&tinsn, size); |
e0001a05 | 4760 | |
43cd72b9 BW |
4761 | if (!insnbuf) |
4762 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
e0001a05 | 4763 | |
43cd72b9 | 4764 | tinsn_to_insnbuf (&tinsn, insnbuf); |
d77b99c9 BW |
4765 | xtensa_insnbuf_to_chars (xtensa_default_isa, insnbuf, |
4766 | (unsigned char *) buf, 0); | |
e0001a05 NC |
4767 | } |
4768 | ||
4769 | ||
4770 | /* Return the number of bytes for the offset of the expanded loop | |
4771 | instruction. This should be incorporated into the relaxation | |
4772 | specification but is hard-coded here. This is used to auto-align | |
4773 | the loop instruction. It is invalid to call this function if the | |
4774 | configuration does not have loops or if the opcode is not a loop | |
4775 | opcode. */ | |
4776 | ||
4777 | static addressT | |
7fa3d080 | 4778 | get_expanded_loop_offset (xtensa_opcode opcode) |
e0001a05 NC |
4779 | { |
4780 | /* This is the OFFSET of the loop instruction in the expanded loop. | |
4781 | This MUST correspond directly to the specification of the loop | |
4782 | expansion. It will be validated on fragment conversion. */ | |
9c2799c2 | 4783 | gas_assert (opcode != XTENSA_UNDEFINED); |
e0001a05 NC |
4784 | if (opcode == xtensa_loop_opcode) |
4785 | return 0; | |
4786 | if (opcode == xtensa_loopnez_opcode) | |
4787 | return 3; | |
4788 | if (opcode == xtensa_loopgtz_opcode) | |
4789 | return 6; | |
4790 | as_fatal (_("get_expanded_loop_offset: invalid opcode")); | |
4791 | return 0; | |
4792 | } | |
4793 | ||
4794 | ||
7fa3d080 BW |
4795 | static fragS * |
4796 | get_literal_pool_location (segT seg) | |
e0001a05 NC |
4797 | { |
4798 | return seg_info (seg)->tc_segment_info_data.literal_pool_loc; | |
4799 | } | |
4800 | ||
4801 | ||
4802 | static void | |
7fa3d080 | 4803 | set_literal_pool_location (segT seg, fragS *literal_pool_loc) |
e0001a05 NC |
4804 | { |
4805 | seg_info (seg)->tc_segment_info_data.literal_pool_loc = literal_pool_loc; | |
4806 | } | |
4807 | ||
43cd72b9 BW |
4808 | |
4809 | /* Set frag assembly state should be called when a new frag is | |
4810 | opened and after a frag has been closed. */ | |
4811 | ||
7fa3d080 BW |
4812 | static void |
4813 | xtensa_set_frag_assembly_state (fragS *fragP) | |
43cd72b9 BW |
4814 | { |
4815 | if (!density_supported) | |
4816 | fragP->tc_frag_data.is_no_density = TRUE; | |
4817 | ||
4818 | /* This function is called from subsegs_finish, which is called | |
c138bc38 | 4819 | after xtensa_end, so we can't use "use_transform" or |
43cd72b9 BW |
4820 | "use_schedule" here. */ |
4821 | if (!directive_state[directive_transform]) | |
4822 | fragP->tc_frag_data.is_no_transform = TRUE; | |
7c834684 BW |
4823 | if (directive_state[directive_longcalls]) |
4824 | fragP->tc_frag_data.use_longcalls = TRUE; | |
43cd72b9 BW |
4825 | fragP->tc_frag_data.use_absolute_literals = |
4826 | directive_state[directive_absolute_literals]; | |
4827 | fragP->tc_frag_data.is_assembly_state_set = TRUE; | |
4828 | } | |
4829 | ||
4830 | ||
7fa3d080 BW |
4831 | static bfd_boolean |
4832 | relaxable_section (asection *sec) | |
43cd72b9 | 4833 | { |
11ac2671 BW |
4834 | return ((sec->flags & SEC_DEBUGGING) == 0 |
4835 | && strcmp (sec->name, ".eh_frame") != 0); | |
43cd72b9 BW |
4836 | } |
4837 | ||
4838 | ||
99ded152 BW |
4839 | static void |
4840 | xtensa_mark_frags_for_org (void) | |
4841 | { | |
4842 | segT *seclist; | |
4843 | ||
4844 | /* Walk over each fragment of all of the current segments. If we find | |
4845 | a .org frag in any of the segments, mark all frags prior to it as | |
4846 | "no transform", which will prevent linker optimizations from messing | |
4847 | up the .org distance. This should be done after | |
4848 | xtensa_find_unmarked_state_frags, because we don't want to worry here | |
4849 | about that function trashing the data we save here. */ | |
4850 | ||
4851 | for (seclist = &stdoutput->sections; | |
4852 | seclist && *seclist; | |
4853 | seclist = &(*seclist)->next) | |
4854 | { | |
4855 | segT sec = *seclist; | |
4856 | segment_info_type *seginfo; | |
4857 | fragS *fragP; | |
4858 | flagword flags; | |
4859 | flags = bfd_get_section_flags (stdoutput, sec); | |
4860 | if (flags & SEC_DEBUGGING) | |
4861 | continue; | |
4862 | if (!(flags & SEC_ALLOC)) | |
4863 | continue; | |
4864 | ||
4865 | seginfo = seg_info (sec); | |
4866 | if (seginfo && seginfo->frchainP) | |
4867 | { | |
4868 | fragS *last_fragP = seginfo->frchainP->frch_root; | |
4869 | for (fragP = seginfo->frchainP->frch_root; fragP; | |
4870 | fragP = fragP->fr_next) | |
4871 | { | |
4872 | /* cvt_frag_to_fill has changed the fr_type of org frags to | |
4873 | rs_fill, so use the value as cached in rs_subtype here. */ | |
4874 | if (fragP->fr_subtype == RELAX_ORG) | |
4875 | { | |
4876 | while (last_fragP != fragP->fr_next) | |
4877 | { | |
4878 | last_fragP->tc_frag_data.is_no_transform = TRUE; | |
4879 | last_fragP = last_fragP->fr_next; | |
4880 | } | |
4881 | } | |
4882 | } | |
4883 | } | |
4884 | } | |
4885 | } | |
4886 | ||
4887 | ||
43cd72b9 | 4888 | static void |
7fa3d080 | 4889 | xtensa_find_unmarked_state_frags (void) |
43cd72b9 BW |
4890 | { |
4891 | segT *seclist; | |
4892 | ||
4893 | /* Walk over each fragment of all of the current segments. For each | |
4894 | unmarked fragment, mark it with the same info as the previous | |
4895 | fragment. */ | |
4896 | for (seclist = &stdoutput->sections; | |
4897 | seclist && *seclist; | |
4898 | seclist = &(*seclist)->next) | |
4899 | { | |
4900 | segT sec = *seclist; | |
4901 | segment_info_type *seginfo; | |
4902 | fragS *fragP; | |
4903 | flagword flags; | |
4904 | flags = bfd_get_section_flags (stdoutput, sec); | |
4905 | if (flags & SEC_DEBUGGING) | |
4906 | continue; | |
4907 | if (!(flags & SEC_ALLOC)) | |
4908 | continue; | |
4909 | ||
4910 | seginfo = seg_info (sec); | |
4911 | if (seginfo && seginfo->frchainP) | |
4912 | { | |
4913 | fragS *last_fragP = 0; | |
4914 | for (fragP = seginfo->frchainP->frch_root; fragP; | |
4915 | fragP = fragP->fr_next) | |
4916 | { | |
4917 | if (fragP->fr_fix != 0 | |
4918 | && !fragP->tc_frag_data.is_assembly_state_set) | |
4919 | { | |
4920 | if (last_fragP == 0) | |
4921 | { | |
4922 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
4923 | _("assembly state not set for first frag in section %s"), | |
4924 | sec->name); | |
4925 | } | |
4926 | else | |
4927 | { | |
4928 | fragP->tc_frag_data.is_assembly_state_set = TRUE; | |
4929 | fragP->tc_frag_data.is_no_density = | |
4930 | last_fragP->tc_frag_data.is_no_density; | |
4931 | fragP->tc_frag_data.is_no_transform = | |
4932 | last_fragP->tc_frag_data.is_no_transform; | |
7c834684 BW |
4933 | fragP->tc_frag_data.use_longcalls = |
4934 | last_fragP->tc_frag_data.use_longcalls; | |
43cd72b9 BW |
4935 | fragP->tc_frag_data.use_absolute_literals = |
4936 | last_fragP->tc_frag_data.use_absolute_literals; | |
4937 | } | |
4938 | } | |
4939 | if (fragP->tc_frag_data.is_assembly_state_set) | |
4940 | last_fragP = fragP; | |
4941 | } | |
4942 | } | |
4943 | } | |
4944 | } | |
4945 | ||
4946 | ||
4947 | static void | |
7fa3d080 BW |
4948 | xtensa_find_unaligned_branch_targets (bfd *abfd ATTRIBUTE_UNUSED, |
4949 | asection *sec, | |
4950 | void *unused ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
4951 | { |
4952 | flagword flags = bfd_get_section_flags (abfd, sec); | |
4953 | segment_info_type *seginfo = seg_info (sec); | |
4954 | fragS *frag = seginfo->frchainP->frch_root; | |
c138bc38 | 4955 | |
43cd72b9 | 4956 | if (flags & SEC_CODE) |
c138bc38 | 4957 | { |
43cd72b9 BW |
4958 | xtensa_isa isa = xtensa_default_isa; |
4959 | xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc (isa); | |
4960 | while (frag != NULL) | |
4961 | { | |
4962 | if (frag->tc_frag_data.is_branch_target) | |
4963 | { | |
4964 | int op_size; | |
664df4e4 | 4965 | addressT branch_align, frag_addr; |
43cd72b9 BW |
4966 | xtensa_format fmt; |
4967 | ||
d77b99c9 BW |
4968 | xtensa_insnbuf_from_chars |
4969 | (isa, insnbuf, (unsigned char *) frag->fr_literal, 0); | |
43cd72b9 BW |
4970 | fmt = xtensa_format_decode (isa, insnbuf); |
4971 | op_size = xtensa_format_length (isa, fmt); | |
664df4e4 BW |
4972 | branch_align = 1 << branch_align_power (sec); |
4973 | frag_addr = frag->fr_address % branch_align; | |
4974 | if (frag_addr + op_size > branch_align) | |
43cd72b9 BW |
4975 | as_warn_where (frag->fr_file, frag->fr_line, |
4976 | _("unaligned branch target: %d bytes at 0x%lx"), | |
dd49a749 | 4977 | op_size, (long) frag->fr_address); |
43cd72b9 BW |
4978 | } |
4979 | frag = frag->fr_next; | |
4980 | } | |
4981 | xtensa_insnbuf_free (isa, insnbuf); | |
4982 | } | |
4983 | } | |
4984 | ||
4985 | ||
4986 | static void | |
7fa3d080 BW |
4987 | xtensa_find_unaligned_loops (bfd *abfd ATTRIBUTE_UNUSED, |
4988 | asection *sec, | |
4989 | void *unused ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
4990 | { |
4991 | flagword flags = bfd_get_section_flags (abfd, sec); | |
4992 | segment_info_type *seginfo = seg_info (sec); | |
4993 | fragS *frag = seginfo->frchainP->frch_root; | |
4994 | xtensa_isa isa = xtensa_default_isa; | |
c138bc38 | 4995 | |
43cd72b9 | 4996 | if (flags & SEC_CODE) |
c138bc38 | 4997 | { |
43cd72b9 BW |
4998 | xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc (isa); |
4999 | while (frag != NULL) | |
5000 | { | |
5001 | if (frag->tc_frag_data.is_first_loop_insn) | |
5002 | { | |
5003 | int op_size; | |
d77b99c9 | 5004 | addressT frag_addr; |
43cd72b9 BW |
5005 | xtensa_format fmt; |
5006 | ||
d77b99c9 BW |
5007 | xtensa_insnbuf_from_chars |
5008 | (isa, insnbuf, (unsigned char *) frag->fr_literal, 0); | |
43cd72b9 BW |
5009 | fmt = xtensa_format_decode (isa, insnbuf); |
5010 | op_size = xtensa_format_length (isa, fmt); | |
5011 | frag_addr = frag->fr_address % xtensa_fetch_width; | |
5012 | ||
d77b99c9 | 5013 | if (frag_addr + op_size > xtensa_fetch_width) |
43cd72b9 BW |
5014 | as_warn_where (frag->fr_file, frag->fr_line, |
5015 | _("unaligned loop: %d bytes at 0x%lx"), | |
dd49a749 | 5016 | op_size, (long) frag->fr_address); |
43cd72b9 BW |
5017 | } |
5018 | frag = frag->fr_next; | |
5019 | } | |
5020 | xtensa_insnbuf_free (isa, insnbuf); | |
5021 | } | |
5022 | } | |
5023 | ||
5024 | ||
30f725a1 BW |
5025 | static int |
5026 | xg_apply_fix_value (fixS *fixP, valueT val) | |
43cd72b9 BW |
5027 | { |
5028 | xtensa_isa isa = xtensa_default_isa; | |
5029 | static xtensa_insnbuf insnbuf = NULL; | |
5030 | static xtensa_insnbuf slotbuf = NULL; | |
5031 | xtensa_format fmt; | |
5032 | int slot; | |
5033 | bfd_boolean alt_reloc; | |
5034 | xtensa_opcode opcode; | |
5035 | char *const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; | |
5036 | ||
1b6e95c2 BW |
5037 | if (decode_reloc (fixP->fx_r_type, &slot, &alt_reloc) |
5038 | || alt_reloc) | |
43cd72b9 BW |
5039 | as_fatal (_("unexpected fix")); |
5040 | ||
5041 | if (!insnbuf) | |
5042 | { | |
5043 | insnbuf = xtensa_insnbuf_alloc (isa); | |
5044 | slotbuf = xtensa_insnbuf_alloc (isa); | |
5045 | } | |
5046 | ||
d77b99c9 | 5047 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) fixpos, 0); |
43cd72b9 BW |
5048 | fmt = xtensa_format_decode (isa, insnbuf); |
5049 | if (fmt == XTENSA_UNDEFINED) | |
5050 | as_fatal (_("undecodable fix")); | |
5051 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
5052 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
5053 | if (opcode == XTENSA_UNDEFINED) | |
5054 | as_fatal (_("undecodable fix")); | |
5055 | ||
5056 | /* CONST16 immediates are not PC-relative, despite the fact that we | |
5057 | reuse the normal PC-relative operand relocations for the low part | |
30f725a1 | 5058 | of a CONST16 operand. */ |
43cd72b9 | 5059 | if (opcode == xtensa_const16_opcode) |
30f725a1 | 5060 | return 0; |
43cd72b9 BW |
5061 | |
5062 | xtensa_insnbuf_set_operand (slotbuf, fmt, slot, opcode, | |
5063 | get_relaxable_immed (opcode), val, | |
5064 | fixP->fx_file, fixP->fx_line); | |
5065 | ||
5066 | xtensa_format_set_slot (isa, fmt, slot, insnbuf, slotbuf); | |
d77b99c9 | 5067 | xtensa_insnbuf_to_chars (isa, insnbuf, (unsigned char *) fixpos, 0); |
30f725a1 BW |
5068 | |
5069 | return 1; | |
43cd72b9 BW |
5070 | } |
5071 | ||
e0001a05 NC |
5072 | \f |
5073 | /* External Functions and Other GAS Hooks. */ | |
5074 | ||
5075 | const char * | |
7fa3d080 | 5076 | xtensa_target_format (void) |
e0001a05 NC |
5077 | { |
5078 | return (target_big_endian ? "elf32-xtensa-be" : "elf32-xtensa-le"); | |
5079 | } | |
5080 | ||
5081 | ||
5082 | void | |
7fa3d080 | 5083 | xtensa_file_arch_init (bfd *abfd) |
e0001a05 NC |
5084 | { |
5085 | bfd_set_private_flags (abfd, 0x100 | 0x200); | |
5086 | } | |
5087 | ||
5088 | ||
5089 | void | |
7fa3d080 | 5090 | md_number_to_chars (char *buf, valueT val, int n) |
e0001a05 NC |
5091 | { |
5092 | if (target_big_endian) | |
5093 | number_to_chars_bigendian (buf, val, n); | |
5094 | else | |
5095 | number_to_chars_littleendian (buf, val, n); | |
5096 | } | |
5097 | ||
5098 | ||
5099 | /* This function is called once, at assembler startup time. It should | |
5100 | set up all the tables, etc. that the MD part of the assembler will | |
5101 | need. */ | |
5102 | ||
5103 | void | |
7fa3d080 | 5104 | md_begin (void) |
e0001a05 NC |
5105 | { |
5106 | segT current_section = now_seg; | |
5107 | int current_subsec = now_subseg; | |
5108 | xtensa_isa isa; | |
62af60e2 | 5109 | int i; |
e0001a05 | 5110 | |
43cd72b9 | 5111 | xtensa_default_isa = xtensa_isa_init (0, 0); |
e0001a05 | 5112 | isa = xtensa_default_isa; |
e0001a05 | 5113 | |
43cd72b9 BW |
5114 | linkrelax = 1; |
5115 | ||
74869ac7 | 5116 | /* Set up the literal sections. */ |
e0001a05 | 5117 | memset (&default_lit_sections, 0, sizeof (default_lit_sections)); |
e0001a05 NC |
5118 | |
5119 | subseg_set (current_section, current_subsec); | |
5120 | ||
5121 | xtensa_addi_opcode = xtensa_opcode_lookup (isa, "addi"); | |
5122 | xtensa_addmi_opcode = xtensa_opcode_lookup (isa, "addmi"); | |
5123 | xtensa_call0_opcode = xtensa_opcode_lookup (isa, "call0"); | |
5124 | xtensa_call4_opcode = xtensa_opcode_lookup (isa, "call4"); | |
5125 | xtensa_call8_opcode = xtensa_opcode_lookup (isa, "call8"); | |
5126 | xtensa_call12_opcode = xtensa_opcode_lookup (isa, "call12"); | |
5127 | xtensa_callx0_opcode = xtensa_opcode_lookup (isa, "callx0"); | |
5128 | xtensa_callx4_opcode = xtensa_opcode_lookup (isa, "callx4"); | |
5129 | xtensa_callx8_opcode = xtensa_opcode_lookup (isa, "callx8"); | |
5130 | xtensa_callx12_opcode = xtensa_opcode_lookup (isa, "callx12"); | |
43cd72b9 | 5131 | xtensa_const16_opcode = xtensa_opcode_lookup (isa, "const16"); |
e0001a05 | 5132 | xtensa_entry_opcode = xtensa_opcode_lookup (isa, "entry"); |
d12f9798 | 5133 | xtensa_extui_opcode = xtensa_opcode_lookup (isa, "extui"); |
43cd72b9 BW |
5134 | xtensa_movi_opcode = xtensa_opcode_lookup (isa, "movi"); |
5135 | xtensa_movi_n_opcode = xtensa_opcode_lookup (isa, "movi.n"); | |
e0001a05 | 5136 | xtensa_isync_opcode = xtensa_opcode_lookup (isa, "isync"); |
19e8f41a | 5137 | xtensa_j_opcode = xtensa_opcode_lookup (isa, "j"); |
e0001a05 | 5138 | xtensa_jx_opcode = xtensa_opcode_lookup (isa, "jx"); |
43cd72b9 | 5139 | xtensa_l32r_opcode = xtensa_opcode_lookup (isa, "l32r"); |
e0001a05 NC |
5140 | xtensa_loop_opcode = xtensa_opcode_lookup (isa, "loop"); |
5141 | xtensa_loopnez_opcode = xtensa_opcode_lookup (isa, "loopnez"); | |
5142 | xtensa_loopgtz_opcode = xtensa_opcode_lookup (isa, "loopgtz"); | |
43cd72b9 | 5143 | xtensa_nop_opcode = xtensa_opcode_lookup (isa, "nop"); |
e0001a05 NC |
5144 | xtensa_nop_n_opcode = xtensa_opcode_lookup (isa, "nop.n"); |
5145 | xtensa_or_opcode = xtensa_opcode_lookup (isa, "or"); | |
5146 | xtensa_ret_opcode = xtensa_opcode_lookup (isa, "ret"); | |
5147 | xtensa_ret_n_opcode = xtensa_opcode_lookup (isa, "ret.n"); | |
5148 | xtensa_retw_opcode = xtensa_opcode_lookup (isa, "retw"); | |
5149 | xtensa_retw_n_opcode = xtensa_opcode_lookup (isa, "retw.n"); | |
43cd72b9 | 5150 | xtensa_rsr_lcount_opcode = xtensa_opcode_lookup (isa, "rsr.lcount"); |
e0001a05 | 5151 | xtensa_waiti_opcode = xtensa_opcode_lookup (isa, "waiti"); |
43cd72b9 | 5152 | |
62af60e2 SA |
5153 | for (i = 0; i < xtensa_isa_num_formats (isa); i++) |
5154 | { | |
5155 | int format_slots = xtensa_format_num_slots (isa, i); | |
5156 | if (format_slots > config_max_slots) | |
5157 | config_max_slots = format_slots; | |
5158 | } | |
5159 | ||
5160 | xg_init_vinsn (&cur_vinsn); | |
5161 | ||
77cba8a3 BW |
5162 | xtensa_num_pipe_stages = xtensa_isa_num_pipe_stages (isa); |
5163 | ||
43cd72b9 BW |
5164 | init_op_placement_info_table (); |
5165 | ||
5166 | /* Set up the assembly state. */ | |
5167 | if (!frag_now->tc_frag_data.is_assembly_state_set) | |
5168 | xtensa_set_frag_assembly_state (frag_now); | |
5169 | } | |
5170 | ||
5171 | ||
5172 | /* TC_INIT_FIX_DATA hook */ | |
5173 | ||
5174 | void | |
7fa3d080 | 5175 | xtensa_init_fix_data (fixS *x) |
43cd72b9 BW |
5176 | { |
5177 | x->tc_fix_data.slot = 0; | |
5178 | x->tc_fix_data.X_add_symbol = NULL; | |
5179 | x->tc_fix_data.X_add_number = 0; | |
e0001a05 NC |
5180 | } |
5181 | ||
5182 | ||
5183 | /* tc_frob_label hook */ | |
5184 | ||
5185 | void | |
7fa3d080 | 5186 | xtensa_frob_label (symbolS *sym) |
e0001a05 | 5187 | { |
3ea38ac2 BW |
5188 | float freq; |
5189 | ||
5190 | if (cur_vinsn.inside_bundle) | |
5191 | { | |
5192 | as_bad (_("labels are not valid inside bundles")); | |
5193 | return; | |
5194 | } | |
5195 | ||
5196 | freq = get_subseg_target_freq (now_seg, now_subseg); | |
7b1cc377 | 5197 | |
43cd72b9 BW |
5198 | /* Since the label was already attached to a frag associated with the |
5199 | previous basic block, it now needs to be reset to the current frag. */ | |
5200 | symbol_set_frag (sym, frag_now); | |
5201 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
5202 | ||
82e7541d BW |
5203 | if (generating_literals) |
5204 | xtensa_add_literal_sym (sym); | |
5205 | else | |
5206 | xtensa_add_insn_label (sym); | |
5207 | ||
7b1cc377 BW |
5208 | if (symbol_get_tc (sym)->is_loop_target) |
5209 | { | |
5210 | if ((get_last_insn_flags (now_seg, now_subseg) | |
e0001a05 | 5211 | & FLAG_IS_BAD_LOOPEND) != 0) |
7b1cc377 BW |
5212 | as_bad (_("invalid last instruction for a zero-overhead loop")); |
5213 | ||
5214 | xtensa_set_frag_assembly_state (frag_now); | |
5215 | frag_var (rs_machine_dependent, 4, 4, RELAX_LOOP_END, | |
5216 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
5217 | ||
5218 | xtensa_set_frag_assembly_state (frag_now); | |
c3ea6048 | 5219 | xtensa_move_labels (frag_now, 0); |
07a53e5c | 5220 | } |
e0001a05 NC |
5221 | |
5222 | /* No target aligning in the absolute section. */ | |
61846f28 | 5223 | if (now_seg != absolute_section |
61846f28 | 5224 | && !is_unaligned_label (sym) |
43cd72b9 BW |
5225 | && !generating_literals) |
5226 | { | |
43cd72b9 BW |
5227 | xtensa_set_frag_assembly_state (frag_now); |
5228 | ||
b7afdeef SA |
5229 | if (do_align_targets ()) |
5230 | frag_var (rs_machine_dependent, 0, (int) freq, | |
5231 | RELAX_DESIRE_ALIGN_IF_TARGET, frag_now->fr_symbol, | |
5232 | frag_now->fr_offset, NULL); | |
5233 | else | |
5234 | frag_var (rs_fill, 0, 0, frag_now->fr_subtype, | |
5235 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
43cd72b9 | 5236 | xtensa_set_frag_assembly_state (frag_now); |
c3ea6048 | 5237 | xtensa_move_labels (frag_now, 0); |
43cd72b9 BW |
5238 | } |
5239 | ||
5240 | /* We need to mark the following properties even if we aren't aligning. */ | |
5241 | ||
5242 | /* If the label is already known to be a branch target, i.e., a | |
5243 | forward branch, mark the frag accordingly. Backward branches | |
5244 | are handled by xg_add_branch_and_loop_targets. */ | |
5245 | if (symbol_get_tc (sym)->is_branch_target) | |
5246 | symbol_get_frag (sym)->tc_frag_data.is_branch_target = TRUE; | |
5247 | ||
5248 | /* Loops only go forward, so they can be identified here. */ | |
5249 | if (symbol_get_tc (sym)->is_loop_target) | |
5250 | symbol_get_frag (sym)->tc_frag_data.is_loop_target = TRUE; | |
07a53e5c RH |
5251 | |
5252 | dwarf2_emit_label (sym); | |
43cd72b9 BW |
5253 | } |
5254 | ||
5255 | ||
5256 | /* tc_unrecognized_line hook */ | |
5257 | ||
5258 | int | |
7fa3d080 | 5259 | xtensa_unrecognized_line (int ch) |
43cd72b9 BW |
5260 | { |
5261 | switch (ch) | |
5262 | { | |
5263 | case '{' : | |
5264 | if (cur_vinsn.inside_bundle == 0) | |
5265 | { | |
5266 | /* PR8110: Cannot emit line number info inside a FLIX bundle | |
5267 | when using --gstabs. Temporarily disable debug info. */ | |
5268 | generate_lineno_debug (); | |
5269 | if (debug_type == DEBUG_STABS) | |
5270 | { | |
5271 | xt_saved_debug_type = debug_type; | |
5272 | debug_type = DEBUG_NONE; | |
5273 | } | |
82e7541d | 5274 | |
43cd72b9 BW |
5275 | cur_vinsn.inside_bundle = 1; |
5276 | } | |
5277 | else | |
5278 | { | |
5279 | as_bad (_("extra opening brace")); | |
5280 | return 0; | |
5281 | } | |
5282 | break; | |
82e7541d | 5283 | |
43cd72b9 BW |
5284 | case '}' : |
5285 | if (cur_vinsn.inside_bundle) | |
5286 | finish_vinsn (&cur_vinsn); | |
5287 | else | |
5288 | { | |
5289 | as_bad (_("extra closing brace")); | |
5290 | return 0; | |
5291 | } | |
5292 | break; | |
5293 | default: | |
5294 | as_bad (_("syntax error")); | |
5295 | return 0; | |
e0001a05 | 5296 | } |
43cd72b9 | 5297 | return 1; |
e0001a05 NC |
5298 | } |
5299 | ||
5300 | ||
5301 | /* md_flush_pending_output hook */ | |
5302 | ||
5303 | void | |
7fa3d080 | 5304 | xtensa_flush_pending_output (void) |
e0001a05 | 5305 | { |
a3582eee BW |
5306 | /* This line fixes a bug where automatically generated gstabs info |
5307 | separates a function label from its entry instruction, ending up | |
5308 | with the literal position between the function label and the entry | |
5309 | instruction and crashing code. It only happens with --gstabs and | |
5310 | --text-section-literals, and when several other obscure relaxation | |
5311 | conditions are met. */ | |
5312 | if (outputting_stabs_line_debug) | |
5313 | return; | |
5314 | ||
43cd72b9 BW |
5315 | if (cur_vinsn.inside_bundle) |
5316 | as_bad (_("missing closing brace")); | |
5317 | ||
e0001a05 NC |
5318 | /* If there is a non-zero instruction fragment, close it. */ |
5319 | if (frag_now_fix () != 0 && frag_now->tc_frag_data.is_insn) | |
5320 | { | |
5321 | frag_wane (frag_now); | |
5322 | frag_new (0); | |
43cd72b9 | 5323 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
5324 | } |
5325 | frag_now->tc_frag_data.is_insn = FALSE; | |
82e7541d BW |
5326 | |
5327 | xtensa_clear_insn_labels (); | |
e0001a05 NC |
5328 | } |
5329 | ||
5330 | ||
43cd72b9 BW |
5331 | /* We had an error while parsing an instruction. The string might look |
5332 | like this: "insn arg1, arg2 }". If so, we need to see the closing | |
5333 | brace and reset some fields. Otherwise, the vinsn never gets closed | |
5334 | and the num_slots field will grow past the end of the array of slots, | |
5335 | and bad things happen. */ | |
5336 | ||
5337 | static void | |
7fa3d080 | 5338 | error_reset_cur_vinsn (void) |
43cd72b9 BW |
5339 | { |
5340 | if (cur_vinsn.inside_bundle) | |
5341 | { | |
5342 | if (*input_line_pointer == '}' | |
5343 | || *(input_line_pointer - 1) == '}' | |
5344 | || *(input_line_pointer - 2) == '}') | |
5345 | xg_clear_vinsn (&cur_vinsn); | |
5346 | } | |
5347 | } | |
5348 | ||
5349 | ||
e0001a05 | 5350 | void |
7fa3d080 | 5351 | md_assemble (char *str) |
e0001a05 NC |
5352 | { |
5353 | xtensa_isa isa = xtensa_default_isa; | |
b224e962 | 5354 | char *opname; |
e0001a05 NC |
5355 | unsigned opnamelen; |
5356 | bfd_boolean has_underbar = FALSE; | |
43cd72b9 | 5357 | char *arg_strings[MAX_INSN_ARGS]; |
e0001a05 | 5358 | int num_args; |
e0001a05 | 5359 | TInsn orig_insn; /* Original instruction from the input. */ |
e0001a05 | 5360 | |
e0001a05 NC |
5361 | tinsn_init (&orig_insn); |
5362 | ||
5363 | /* Split off the opcode. */ | |
5364 | opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_/0123456789."); | |
5365 | opname = xmalloc (opnamelen + 1); | |
5366 | memcpy (opname, str, opnamelen); | |
5367 | opname[opnamelen] = '\0'; | |
5368 | ||
5369 | num_args = tokenize_arguments (arg_strings, str + opnamelen); | |
5370 | if (num_args == -1) | |
5371 | { | |
5372 | as_bad (_("syntax error")); | |
5373 | return; | |
5374 | } | |
5375 | ||
5376 | if (xg_translate_idioms (&opname, &num_args, arg_strings)) | |
5377 | return; | |
5378 | ||
5379 | /* Check for an underbar prefix. */ | |
5380 | if (*opname == '_') | |
5381 | { | |
5382 | has_underbar = TRUE; | |
5383 | opname += 1; | |
5384 | } | |
5385 | ||
5386 | orig_insn.insn_type = ITYPE_INSN; | |
5387 | orig_insn.ntok = 0; | |
43cd72b9 | 5388 | orig_insn.is_specific_opcode = (has_underbar || !use_transform ()); |
e0001a05 | 5389 | orig_insn.opcode = xtensa_opcode_lookup (isa, opname); |
28dbbc02 BW |
5390 | |
5391 | /* Special case: Check for "CALLXn.TLS" psuedo op. If found, grab its | |
5392 | extra argument and set the opcode to "CALLXn". */ | |
5393 | if (orig_insn.opcode == XTENSA_UNDEFINED | |
5394 | && strncasecmp (opname, "callx", 5) == 0) | |
5395 | { | |
5396 | unsigned long window_size; | |
5397 | char *suffix; | |
5398 | ||
5399 | window_size = strtoul (opname + 5, &suffix, 10); | |
5400 | if (suffix != opname + 5 | |
5401 | && (window_size == 0 | |
5402 | || window_size == 4 | |
5403 | || window_size == 8 | |
5404 | || window_size == 12) | |
5405 | && strcasecmp (suffix, ".tls") == 0) | |
5406 | { | |
5407 | switch (window_size) | |
5408 | { | |
5409 | case 0: orig_insn.opcode = xtensa_callx0_opcode; break; | |
5410 | case 4: orig_insn.opcode = xtensa_callx4_opcode; break; | |
5411 | case 8: orig_insn.opcode = xtensa_callx8_opcode; break; | |
5412 | case 12: orig_insn.opcode = xtensa_callx12_opcode; break; | |
5413 | } | |
5414 | ||
5415 | if (num_args != 2) | |
5416 | as_bad (_("wrong number of operands for '%s'"), opname); | |
5417 | else | |
5418 | { | |
5419 | bfd_reloc_code_real_type reloc; | |
5420 | char *old_input_line_pointer; | |
19e8f41a | 5421 | expressionS *tok = &orig_insn.extra_arg; |
28dbbc02 BW |
5422 | segT t; |
5423 | ||
5424 | old_input_line_pointer = input_line_pointer; | |
5425 | input_line_pointer = arg_strings[num_args - 1]; | |
5426 | ||
5427 | t = expression (tok); | |
5428 | if (tok->X_op == O_symbol | |
5429 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, tok)) | |
5430 | == BFD_RELOC_XTENSA_TLS_CALL)) | |
5431 | tok->X_op = map_suffix_reloc_to_operator (reloc); | |
5432 | else | |
5433 | as_bad (_("bad relocation expression for '%s'"), opname); | |
5434 | ||
5435 | input_line_pointer = old_input_line_pointer; | |
5436 | num_args -= 1; | |
5437 | } | |
5438 | } | |
5439 | } | |
5440 | ||
19e8f41a BW |
5441 | /* Special case: Check for "j.l" psuedo op. */ |
5442 | if (orig_insn.opcode == XTENSA_UNDEFINED | |
5443 | && strncasecmp (opname, "j.l", 3) == 0) | |
5444 | { | |
5445 | if (num_args != 2) | |
5446 | as_bad (_("wrong number of operands for '%s'"), opname); | |
5447 | else | |
5448 | { | |
5449 | char *old_input_line_pointer; | |
5450 | expressionS *tok = &orig_insn.extra_arg; | |
5451 | ||
5452 | old_input_line_pointer = input_line_pointer; | |
5453 | input_line_pointer = arg_strings[num_args - 1]; | |
5454 | ||
5455 | expression_maybe_register (xtensa_jx_opcode, 0, tok); | |
5456 | input_line_pointer = old_input_line_pointer; | |
5457 | ||
5458 | num_args -= 1; | |
5459 | orig_insn.opcode = xtensa_j_opcode; | |
5460 | } | |
5461 | } | |
5462 | ||
e0001a05 NC |
5463 | if (orig_insn.opcode == XTENSA_UNDEFINED) |
5464 | { | |
43cd72b9 BW |
5465 | xtensa_format fmt = xtensa_format_lookup (isa, opname); |
5466 | if (fmt == XTENSA_UNDEFINED) | |
5467 | { | |
5468 | as_bad (_("unknown opcode or format name '%s'"), opname); | |
5469 | error_reset_cur_vinsn (); | |
5470 | return; | |
5471 | } | |
5472 | if (!cur_vinsn.inside_bundle) | |
5473 | { | |
5474 | as_bad (_("format names only valid inside bundles")); | |
5475 | error_reset_cur_vinsn (); | |
5476 | return; | |
5477 | } | |
5478 | if (cur_vinsn.format != XTENSA_UNDEFINED) | |
5479 | as_warn (_("multiple formats specified for one bundle; using '%s'"), | |
5480 | opname); | |
5481 | cur_vinsn.format = fmt; | |
5482 | free (has_underbar ? opname - 1 : opname); | |
5483 | error_reset_cur_vinsn (); | |
e0001a05 NC |
5484 | return; |
5485 | } | |
5486 | ||
e0001a05 NC |
5487 | /* Parse the arguments. */ |
5488 | if (parse_arguments (&orig_insn, num_args, arg_strings)) | |
5489 | { | |
5490 | as_bad (_("syntax error")); | |
43cd72b9 | 5491 | error_reset_cur_vinsn (); |
e0001a05 NC |
5492 | return; |
5493 | } | |
5494 | ||
5495 | /* Free the opcode and argument strings, now that they've been parsed. */ | |
5496 | free (has_underbar ? opname - 1 : opname); | |
5497 | opname = 0; | |
5498 | while (num_args-- > 0) | |
5499 | free (arg_strings[num_args]); | |
5500 | ||
43cd72b9 BW |
5501 | /* Get expressions for invisible operands. */ |
5502 | if (get_invisible_operands (&orig_insn)) | |
5503 | { | |
5504 | error_reset_cur_vinsn (); | |
5505 | return; | |
5506 | } | |
5507 | ||
e0001a05 NC |
5508 | /* Check for the right number and type of arguments. */ |
5509 | if (tinsn_check_arguments (&orig_insn)) | |
e0001a05 | 5510 | { |
43cd72b9 BW |
5511 | error_reset_cur_vinsn (); |
5512 | return; | |
e0001a05 NC |
5513 | } |
5514 | ||
b224e962 BW |
5515 | /* Record the line number for each TInsn, because a FLIX bundle may be |
5516 | spread across multiple input lines and individual instructions may be | |
5517 | moved around in some cases. */ | |
5518 | orig_insn.loc_directive_seen = dwarf2_loc_directive_seen; | |
5519 | dwarf2_where (&orig_insn.debug_line); | |
5520 | dwarf2_consume_line_info (); | |
c138bc38 | 5521 | |
43cd72b9 BW |
5522 | xg_add_branch_and_loop_targets (&orig_insn); |
5523 | ||
431ad2d0 BW |
5524 | /* Check that immediate value for ENTRY is >= 16. */ |
5525 | if (orig_insn.opcode == xtensa_entry_opcode && orig_insn.ntok >= 3) | |
e0001a05 | 5526 | { |
431ad2d0 BW |
5527 | expressionS *exp = &orig_insn.tok[2]; |
5528 | if (exp->X_op == O_constant && exp->X_add_number < 16) | |
5529 | as_warn (_("entry instruction with stack decrement < 16")); | |
e0001a05 NC |
5530 | } |
5531 | ||
e0001a05 | 5532 | /* Finish it off: |
43cd72b9 BW |
5533 | assemble_tokens (opcode, tok, ntok); |
5534 | expand the tokens from the orig_insn into the | |
5535 | stack of instructions that will not expand | |
e0001a05 | 5536 | unless required at relaxation time. */ |
e0001a05 | 5537 | |
43cd72b9 BW |
5538 | if (!cur_vinsn.inside_bundle) |
5539 | emit_single_op (&orig_insn); | |
5540 | else /* We are inside a bundle. */ | |
e0001a05 | 5541 | { |
43cd72b9 BW |
5542 | cur_vinsn.slots[cur_vinsn.num_slots] = orig_insn; |
5543 | cur_vinsn.num_slots++; | |
5544 | if (*input_line_pointer == '}' | |
5545 | || *(input_line_pointer - 1) == '}' | |
5546 | || *(input_line_pointer - 2) == '}') | |
5547 | finish_vinsn (&cur_vinsn); | |
e0001a05 NC |
5548 | } |
5549 | ||
43cd72b9 BW |
5550 | /* We've just emitted a new instruction so clear the list of labels. */ |
5551 | xtensa_clear_insn_labels (); | |
e0001a05 NC |
5552 | } |
5553 | ||
5554 | ||
43cd72b9 | 5555 | /* HANDLE_ALIGN hook */ |
e0001a05 | 5556 | |
43cd72b9 BW |
5557 | /* For a .align directive, we mark the previous block with the alignment |
5558 | information. This will be placed in the object file in the | |
5559 | property section corresponding to this section. */ | |
e0001a05 | 5560 | |
43cd72b9 | 5561 | void |
7fa3d080 | 5562 | xtensa_handle_align (fragS *fragP) |
43cd72b9 BW |
5563 | { |
5564 | if (linkrelax | |
b08b5071 | 5565 | && ! fragP->tc_frag_data.is_literal |
43cd72b9 BW |
5566 | && (fragP->fr_type == rs_align |
5567 | || fragP->fr_type == rs_align_code) | |
5568 | && fragP->fr_address + fragP->fr_fix > 0 | |
5569 | && fragP->fr_offset > 0 | |
5570 | && now_seg != bss_section) | |
e0001a05 | 5571 | { |
43cd72b9 BW |
5572 | fragP->tc_frag_data.is_align = TRUE; |
5573 | fragP->tc_frag_data.alignment = fragP->fr_offset; | |
e0001a05 NC |
5574 | } |
5575 | ||
43cd72b9 | 5576 | if (fragP->fr_type == rs_align_test) |
e0001a05 | 5577 | { |
43cd72b9 BW |
5578 | int count; |
5579 | count = fragP->fr_next->fr_address - fragP->fr_address - fragP->fr_fix; | |
5580 | if (count != 0) | |
c138bc38 | 5581 | as_bad_where (fragP->fr_file, fragP->fr_line, |
43cd72b9 | 5582 | _("unaligned entry instruction")); |
e0001a05 | 5583 | } |
99ded152 BW |
5584 | |
5585 | if (linkrelax && fragP->fr_type == rs_org) | |
5586 | fragP->fr_subtype = RELAX_ORG; | |
e0001a05 | 5587 | } |
43cd72b9 | 5588 | |
e0001a05 NC |
5589 | |
5590 | /* TC_FRAG_INIT hook */ | |
5591 | ||
5592 | void | |
7fa3d080 | 5593 | xtensa_frag_init (fragS *frag) |
e0001a05 | 5594 | { |
43cd72b9 | 5595 | xtensa_set_frag_assembly_state (frag); |
e0001a05 NC |
5596 | } |
5597 | ||
5598 | ||
5599 | symbolS * | |
7fa3d080 | 5600 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
e0001a05 NC |
5601 | { |
5602 | return NULL; | |
5603 | } | |
5604 | ||
5605 | ||
5606 | /* Round up a section size to the appropriate boundary. */ | |
5607 | ||
5608 | valueT | |
7fa3d080 | 5609 | md_section_align (segT segment ATTRIBUTE_UNUSED, valueT size) |
e0001a05 NC |
5610 | { |
5611 | return size; /* Byte alignment is fine. */ | |
5612 | } | |
5613 | ||
5614 | ||
5615 | long | |
7fa3d080 | 5616 | md_pcrel_from (fixS *fixP) |
e0001a05 NC |
5617 | { |
5618 | char *insn_p; | |
5619 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 5620 | static xtensa_insnbuf slotbuf = NULL; |
e0001a05 | 5621 | int opnum; |
43cd72b9 | 5622 | uint32 opnd_value; |
e0001a05 | 5623 | xtensa_opcode opcode; |
43cd72b9 BW |
5624 | xtensa_format fmt; |
5625 | int slot; | |
e0001a05 NC |
5626 | xtensa_isa isa = xtensa_default_isa; |
5627 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; | |
43cd72b9 | 5628 | bfd_boolean alt_reloc; |
e0001a05 | 5629 | |
e0001a05 | 5630 | if (fixP->fx_r_type == BFD_RELOC_XTENSA_ASM_EXPAND) |
30f725a1 | 5631 | return 0; |
e0001a05 | 5632 | |
1bbb5f21 BW |
5633 | if (fixP->fx_r_type == BFD_RELOC_32_PCREL) |
5634 | return addr; | |
5635 | ||
e0001a05 | 5636 | if (!insnbuf) |
43cd72b9 BW |
5637 | { |
5638 | insnbuf = xtensa_insnbuf_alloc (isa); | |
5639 | slotbuf = xtensa_insnbuf_alloc (isa); | |
5640 | } | |
e0001a05 NC |
5641 | |
5642 | insn_p = &fixP->fx_frag->fr_literal[fixP->fx_where]; | |
d77b99c9 | 5643 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) insn_p, 0); |
43cd72b9 BW |
5644 | fmt = xtensa_format_decode (isa, insnbuf); |
5645 | ||
5646 | if (fmt == XTENSA_UNDEFINED) | |
5647 | as_fatal (_("bad instruction format")); | |
5648 | ||
5649 | if (decode_reloc (fixP->fx_r_type, &slot, &alt_reloc) != 0) | |
5650 | as_fatal (_("invalid relocation")); | |
5651 | ||
5652 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
5653 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
5654 | ||
30f725a1 BW |
5655 | /* Check for "alternate" relocations (operand not specified). None |
5656 | of the current uses for these are really PC-relative. */ | |
43cd72b9 BW |
5657 | if (alt_reloc || opcode == xtensa_const16_opcode) |
5658 | { | |
5659 | if (opcode != xtensa_l32r_opcode | |
5660 | && opcode != xtensa_const16_opcode) | |
5661 | as_fatal (_("invalid relocation for '%s' instruction"), | |
5662 | xtensa_opcode_name (isa, opcode)); | |
30f725a1 | 5663 | return 0; |
e0001a05 NC |
5664 | } |
5665 | ||
43cd72b9 BW |
5666 | opnum = get_relaxable_immed (opcode); |
5667 | opnd_value = 0; | |
5668 | if (xtensa_operand_is_PCrelative (isa, opcode, opnum) != 1 | |
5669 | || xtensa_operand_do_reloc (isa, opcode, opnum, &opnd_value, addr)) | |
e0001a05 NC |
5670 | { |
5671 | as_bad_where (fixP->fx_file, | |
5672 | fixP->fx_line, | |
5673 | _("invalid relocation for operand %d of '%s'"), | |
5674 | opnum, xtensa_opcode_name (isa, opcode)); | |
30f725a1 | 5675 | return 0; |
e0001a05 | 5676 | } |
43cd72b9 BW |
5677 | return 0 - opnd_value; |
5678 | } | |
5679 | ||
5680 | ||
5681 | /* TC_FORCE_RELOCATION hook */ | |
5682 | ||
5683 | int | |
7fa3d080 | 5684 | xtensa_force_relocation (fixS *fix) |
43cd72b9 BW |
5685 | { |
5686 | switch (fix->fx_r_type) | |
30f725a1 BW |
5687 | { |
5688 | case BFD_RELOC_XTENSA_ASM_EXPAND: | |
43cd72b9 BW |
5689 | case BFD_RELOC_XTENSA_SLOT0_ALT: |
5690 | case BFD_RELOC_XTENSA_SLOT1_ALT: | |
5691 | case BFD_RELOC_XTENSA_SLOT2_ALT: | |
5692 | case BFD_RELOC_XTENSA_SLOT3_ALT: | |
5693 | case BFD_RELOC_XTENSA_SLOT4_ALT: | |
5694 | case BFD_RELOC_XTENSA_SLOT5_ALT: | |
5695 | case BFD_RELOC_XTENSA_SLOT6_ALT: | |
5696 | case BFD_RELOC_XTENSA_SLOT7_ALT: | |
5697 | case BFD_RELOC_XTENSA_SLOT8_ALT: | |
5698 | case BFD_RELOC_XTENSA_SLOT9_ALT: | |
5699 | case BFD_RELOC_XTENSA_SLOT10_ALT: | |
5700 | case BFD_RELOC_XTENSA_SLOT11_ALT: | |
5701 | case BFD_RELOC_XTENSA_SLOT12_ALT: | |
5702 | case BFD_RELOC_XTENSA_SLOT13_ALT: | |
5703 | case BFD_RELOC_XTENSA_SLOT14_ALT: | |
43cd72b9 BW |
5704 | return 1; |
5705 | default: | |
5706 | break; | |
e0001a05 NC |
5707 | } |
5708 | ||
43cd72b9 BW |
5709 | if (linkrelax && fix->fx_addsy |
5710 | && relaxable_section (S_GET_SEGMENT (fix->fx_addsy))) | |
5711 | return 1; | |
5712 | ||
5713 | return generic_force_reloc (fix); | |
5714 | } | |
5715 | ||
5716 | ||
30f725a1 BW |
5717 | /* TC_VALIDATE_FIX_SUB hook */ |
5718 | ||
5719 | int | |
5720 | xtensa_validate_fix_sub (fixS *fix) | |
5721 | { | |
5722 | segT add_symbol_segment, sub_symbol_segment; | |
5723 | ||
5724 | /* The difference of two symbols should be resolved by the assembler when | |
5725 | linkrelax is not set. If the linker may relax the section containing | |
5726 | the symbols, then an Xtensa DIFF relocation must be generated so that | |
5727 | the linker knows to adjust the difference value. */ | |
5728 | if (!linkrelax || fix->fx_addsy == NULL) | |
5729 | return 0; | |
5730 | ||
5731 | /* Make sure both symbols are in the same segment, and that segment is | |
5732 | "normal" and relaxable. If the segment is not "normal", then the | |
5733 | fix is not valid. If the segment is not "relaxable", then the fix | |
5734 | should have been handled earlier. */ | |
5735 | add_symbol_segment = S_GET_SEGMENT (fix->fx_addsy); | |
5736 | if (! SEG_NORMAL (add_symbol_segment) || | |
5737 | ! relaxable_section (add_symbol_segment)) | |
5738 | return 0; | |
5739 | sub_symbol_segment = S_GET_SEGMENT (fix->fx_subsy); | |
5740 | return (sub_symbol_segment == add_symbol_segment); | |
5741 | } | |
5742 | ||
5743 | ||
43cd72b9 BW |
5744 | /* NO_PSEUDO_DOT hook */ |
5745 | ||
5746 | /* This function has nothing to do with pseudo dots, but this is the | |
5747 | nearest macro to where the check needs to take place. FIXME: This | |
5748 | seems wrong. */ | |
5749 | ||
5750 | bfd_boolean | |
7fa3d080 | 5751 | xtensa_check_inside_bundle (void) |
43cd72b9 BW |
5752 | { |
5753 | if (cur_vinsn.inside_bundle && input_line_pointer[-1] == '.') | |
5754 | as_bad (_("directives are not valid inside bundles")); | |
5755 | ||
5756 | /* This function must always return FALSE because it is called via a | |
5757 | macro that has nothing to do with bundling. */ | |
5758 | return FALSE; | |
e0001a05 NC |
5759 | } |
5760 | ||
5761 | ||
43cd72b9 | 5762 | /* md_elf_section_change_hook */ |
e0001a05 NC |
5763 | |
5764 | void | |
7fa3d080 | 5765 | xtensa_elf_section_change_hook (void) |
e0001a05 | 5766 | { |
43cd72b9 BW |
5767 | /* Set up the assembly state. */ |
5768 | if (!frag_now->tc_frag_data.is_assembly_state_set) | |
5769 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
5770 | } |
5771 | ||
5772 | ||
5773 | /* tc_fix_adjustable hook */ | |
5774 | ||
5775 | bfd_boolean | |
7fa3d080 | 5776 | xtensa_fix_adjustable (fixS *fixP) |
e0001a05 NC |
5777 | { |
5778 | /* We need the symbol name for the VTABLE entries. */ | |
5779 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
5780 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
5781 | return 0; | |
5782 | ||
5783 | return 1; | |
5784 | } | |
5785 | ||
5786 | ||
6a7eedfe BW |
5787 | /* tc_symbol_new_hook */ |
5788 | ||
5789 | symbolS *expr_symbols = NULL; | |
5790 | ||
5791 | void | |
5792 | xtensa_symbol_new_hook (symbolS *sym) | |
5793 | { | |
fb227da0 | 5794 | if (is_leb128_expr && S_GET_SEGMENT (sym) == expr_section) |
6a7eedfe BW |
5795 | { |
5796 | symbol_get_tc (sym)->next_expr_symbol = expr_symbols; | |
5797 | expr_symbols = sym; | |
5798 | } | |
5799 | } | |
5800 | ||
5801 | ||
e0001a05 | 5802 | void |
55cf6793 | 5803 | md_apply_fix (fixS *fixP, valueT *valP, segT seg) |
e0001a05 | 5804 | { |
30f725a1 | 5805 | char *const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; |
d47d412e | 5806 | valueT val = 0; |
30f725a1 | 5807 | |
e7da6241 BW |
5808 | /* Subtracted symbols are only allowed for a few relocation types, and |
5809 | unless linkrelax is enabled, they should not make it to this point. */ | |
5810 | if (fixP->fx_subsy && !(linkrelax && (fixP->fx_r_type == BFD_RELOC_32 | |
5811 | || fixP->fx_r_type == BFD_RELOC_16 | |
5812 | || fixP->fx_r_type == BFD_RELOC_8))) | |
5813 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
5814 | ||
30f725a1 | 5815 | switch (fixP->fx_r_type) |
e0001a05 | 5816 | { |
1bbb5f21 | 5817 | case BFD_RELOC_32_PCREL: |
30f725a1 BW |
5818 | case BFD_RELOC_32: |
5819 | case BFD_RELOC_16: | |
5820 | case BFD_RELOC_8: | |
e7da6241 | 5821 | if (fixP->fx_subsy) |
30f725a1 BW |
5822 | { |
5823 | switch (fixP->fx_r_type) | |
5824 | { | |
5825 | case BFD_RELOC_8: | |
5826 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF8; | |
5827 | break; | |
5828 | case BFD_RELOC_16: | |
5829 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF16; | |
5830 | break; | |
5831 | case BFD_RELOC_32: | |
5832 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF32; | |
5833 | break; | |
5834 | default: | |
5835 | break; | |
5836 | } | |
e0001a05 | 5837 | |
30f725a1 BW |
5838 | val = (S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset |
5839 | - S_GET_VALUE (fixP->fx_subsy)); | |
5840 | ||
5841 | /* The difference value gets written out, and the DIFF reloc | |
5842 | identifies the address of the subtracted symbol (i.e., the one | |
5843 | with the lowest address). */ | |
5844 | *valP = val; | |
5845 | fixP->fx_offset -= val; | |
5846 | fixP->fx_subsy = NULL; | |
5847 | } | |
5848 | else if (! fixP->fx_addsy) | |
e0001a05 | 5849 | { |
30f725a1 | 5850 | val = *valP; |
e0001a05 | 5851 | fixP->fx_done = 1; |
30f725a1 | 5852 | } |
d47d412e BW |
5853 | /* fall through */ |
5854 | ||
5855 | case BFD_RELOC_XTENSA_PLT: | |
30f725a1 BW |
5856 | md_number_to_chars (fixpos, val, fixP->fx_size); |
5857 | fixP->fx_no_overflow = 0; /* Use the standard overflow check. */ | |
5858 | break; | |
e0001a05 | 5859 | |
28dbbc02 BW |
5860 | case BFD_RELOC_XTENSA_TLSDESC_FN: |
5861 | case BFD_RELOC_XTENSA_TLSDESC_ARG: | |
5862 | case BFD_RELOC_XTENSA_TLS_TPOFF: | |
5863 | case BFD_RELOC_XTENSA_TLS_DTPOFF: | |
5864 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
5865 | md_number_to_chars (fixpos, 0, fixP->fx_size); | |
5866 | fixP->fx_no_overflow = 0; /* Use the standard overflow check. */ | |
5867 | break; | |
5868 | ||
30f725a1 BW |
5869 | case BFD_RELOC_XTENSA_SLOT0_OP: |
5870 | case BFD_RELOC_XTENSA_SLOT1_OP: | |
5871 | case BFD_RELOC_XTENSA_SLOT2_OP: | |
5872 | case BFD_RELOC_XTENSA_SLOT3_OP: | |
5873 | case BFD_RELOC_XTENSA_SLOT4_OP: | |
5874 | case BFD_RELOC_XTENSA_SLOT5_OP: | |
5875 | case BFD_RELOC_XTENSA_SLOT6_OP: | |
5876 | case BFD_RELOC_XTENSA_SLOT7_OP: | |
5877 | case BFD_RELOC_XTENSA_SLOT8_OP: | |
5878 | case BFD_RELOC_XTENSA_SLOT9_OP: | |
5879 | case BFD_RELOC_XTENSA_SLOT10_OP: | |
5880 | case BFD_RELOC_XTENSA_SLOT11_OP: | |
5881 | case BFD_RELOC_XTENSA_SLOT12_OP: | |
5882 | case BFD_RELOC_XTENSA_SLOT13_OP: | |
5883 | case BFD_RELOC_XTENSA_SLOT14_OP: | |
5884 | if (linkrelax) | |
5885 | { | |
5886 | /* Write the tentative value of a PC-relative relocation to a | |
5887 | local symbol into the instruction. The value will be ignored | |
5888 | by the linker, and it makes the object file disassembly | |
5889 | readable when all branch targets are encoded in relocations. */ | |
5890 | ||
9c2799c2 | 5891 | gas_assert (fixP->fx_addsy); |
20ee54e8 | 5892 | if (S_GET_SEGMENT (fixP->fx_addsy) == seg |
30f725a1 BW |
5893 | && !S_FORCE_RELOC (fixP->fx_addsy, 1)) |
5894 | { | |
5895 | val = (S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset | |
5896 | - md_pcrel_from (fixP)); | |
5897 | (void) xg_apply_fix_value (fixP, val); | |
5898 | } | |
5899 | } | |
5900 | else if (! fixP->fx_addsy) | |
5901 | { | |
5902 | val = *valP; | |
5903 | if (xg_apply_fix_value (fixP, val)) | |
5904 | fixP->fx_done = 1; | |
5905 | } | |
5906 | break; | |
e0001a05 | 5907 | |
30f725a1 | 5908 | case BFD_RELOC_XTENSA_ASM_EXPAND: |
28dbbc02 BW |
5909 | case BFD_RELOC_XTENSA_TLS_FUNC: |
5910 | case BFD_RELOC_XTENSA_TLS_ARG: | |
5911 | case BFD_RELOC_XTENSA_TLS_CALL: | |
30f725a1 BW |
5912 | case BFD_RELOC_XTENSA_SLOT0_ALT: |
5913 | case BFD_RELOC_XTENSA_SLOT1_ALT: | |
5914 | case BFD_RELOC_XTENSA_SLOT2_ALT: | |
5915 | case BFD_RELOC_XTENSA_SLOT3_ALT: | |
5916 | case BFD_RELOC_XTENSA_SLOT4_ALT: | |
5917 | case BFD_RELOC_XTENSA_SLOT5_ALT: | |
5918 | case BFD_RELOC_XTENSA_SLOT6_ALT: | |
5919 | case BFD_RELOC_XTENSA_SLOT7_ALT: | |
5920 | case BFD_RELOC_XTENSA_SLOT8_ALT: | |
5921 | case BFD_RELOC_XTENSA_SLOT9_ALT: | |
5922 | case BFD_RELOC_XTENSA_SLOT10_ALT: | |
5923 | case BFD_RELOC_XTENSA_SLOT11_ALT: | |
5924 | case BFD_RELOC_XTENSA_SLOT12_ALT: | |
5925 | case BFD_RELOC_XTENSA_SLOT13_ALT: | |
5926 | case BFD_RELOC_XTENSA_SLOT14_ALT: | |
5927 | /* These all need to be resolved at link-time. Do nothing now. */ | |
5928 | break; | |
e0001a05 | 5929 | |
30f725a1 BW |
5930 | case BFD_RELOC_VTABLE_INHERIT: |
5931 | case BFD_RELOC_VTABLE_ENTRY: | |
5932 | fixP->fx_done = 0; | |
5933 | break; | |
e0001a05 | 5934 | |
30f725a1 BW |
5935 | default: |
5936 | as_bad (_("unhandled local relocation fix %s"), | |
5937 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
e0001a05 NC |
5938 | } |
5939 | } | |
5940 | ||
5941 | ||
5942 | char * | |
7fa3d080 | 5943 | md_atof (int type, char *litP, int *sizeP) |
e0001a05 | 5944 | { |
499ac353 | 5945 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
e0001a05 NC |
5946 | } |
5947 | ||
5948 | ||
5949 | int | |
7fa3d080 | 5950 | md_estimate_size_before_relax (fragS *fragP, segT seg ATTRIBUTE_UNUSED) |
e0001a05 | 5951 | { |
34e41783 | 5952 | return total_frag_text_expansion (fragP); |
e0001a05 NC |
5953 | } |
5954 | ||
5955 | ||
5956 | /* Translate internal representation of relocation info to BFD target | |
5957 | format. */ | |
5958 | ||
5959 | arelent * | |
30f725a1 | 5960 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
e0001a05 NC |
5961 | { |
5962 | arelent *reloc; | |
5963 | ||
5964 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
5965 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
5966 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
5967 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
5968 | ||
5969 | /* Make sure none of our internal relocations make it this far. | |
5970 | They'd better have been fully resolved by this point. */ | |
9c2799c2 | 5971 | gas_assert ((int) fixp->fx_r_type > 0); |
e0001a05 | 5972 | |
30f725a1 | 5973 | reloc->addend = fixp->fx_offset; |
43cd72b9 | 5974 | |
e0001a05 NC |
5975 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
5976 | if (reloc->howto == NULL) | |
5977 | { | |
5978 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5979 | _("cannot represent `%s' relocation in object file"), | |
5980 | bfd_get_reloc_code_name (fixp->fx_r_type)); | |
43cd72b9 BW |
5981 | free (reloc->sym_ptr_ptr); |
5982 | free (reloc); | |
e0001a05 NC |
5983 | return NULL; |
5984 | } | |
5985 | ||
5986 | if (!fixp->fx_pcrel != !reloc->howto->pc_relative) | |
1bbb5f21 | 5987 | as_fatal (_("internal error; cannot generate `%s' relocation"), |
43cd72b9 | 5988 | bfd_get_reloc_code_name (fixp->fx_r_type)); |
e0001a05 | 5989 | |
e0001a05 NC |
5990 | return reloc; |
5991 | } | |
5992 | ||
7fa3d080 BW |
5993 | \f |
5994 | /* Checks for resource conflicts between instructions. */ | |
5995 | ||
c138bc38 BW |
5996 | /* The func unit stuff could be implemented as bit-vectors rather |
5997 | than the iterative approach here. If it ends up being too | |
7fa3d080 BW |
5998 | slow, we will switch it. */ |
5999 | ||
c138bc38 | 6000 | resource_table * |
7fa3d080 BW |
6001 | new_resource_table (void *data, |
6002 | int cycles, | |
6003 | int nu, | |
6004 | unit_num_copies_func uncf, | |
6005 | opcode_num_units_func onuf, | |
6006 | opcode_funcUnit_use_unit_func ouuf, | |
6007 | opcode_funcUnit_use_stage_func ousf) | |
6008 | { | |
6009 | int i; | |
6010 | resource_table *rt = (resource_table *) xmalloc (sizeof (resource_table)); | |
6011 | rt->data = data; | |
6012 | rt->cycles = cycles; | |
6013 | rt->allocated_cycles = cycles; | |
6014 | rt->num_units = nu; | |
6015 | rt->unit_num_copies = uncf; | |
6016 | rt->opcode_num_units = onuf; | |
6017 | rt->opcode_unit_use = ouuf; | |
6018 | rt->opcode_unit_stage = ousf; | |
6019 | ||
0bf60745 | 6020 | rt->units = (unsigned char **) xcalloc (cycles, sizeof (unsigned char *)); |
7fa3d080 | 6021 | for (i = 0; i < cycles; i++) |
0bf60745 | 6022 | rt->units[i] = (unsigned char *) xcalloc (nu, sizeof (unsigned char)); |
7fa3d080 BW |
6023 | |
6024 | return rt; | |
6025 | } | |
6026 | ||
6027 | ||
c138bc38 | 6028 | void |
7fa3d080 BW |
6029 | clear_resource_table (resource_table *rt) |
6030 | { | |
6031 | int i, j; | |
6032 | for (i = 0; i < rt->allocated_cycles; i++) | |
6033 | for (j = 0; j < rt->num_units; j++) | |
6034 | rt->units[i][j] = 0; | |
6035 | } | |
6036 | ||
6037 | ||
6038 | /* We never shrink it, just fake it into thinking so. */ | |
6039 | ||
c138bc38 | 6040 | void |
7fa3d080 BW |
6041 | resize_resource_table (resource_table *rt, int cycles) |
6042 | { | |
6043 | int i, old_cycles; | |
6044 | ||
6045 | rt->cycles = cycles; | |
6046 | if (cycles <= rt->allocated_cycles) | |
6047 | return; | |
6048 | ||
6049 | old_cycles = rt->allocated_cycles; | |
6050 | rt->allocated_cycles = cycles; | |
6051 | ||
0bf60745 BW |
6052 | rt->units = xrealloc (rt->units, |
6053 | rt->allocated_cycles * sizeof (unsigned char *)); | |
7fa3d080 | 6054 | for (i = 0; i < old_cycles; i++) |
0bf60745 BW |
6055 | rt->units[i] = xrealloc (rt->units[i], |
6056 | rt->num_units * sizeof (unsigned char)); | |
7fa3d080 | 6057 | for (i = old_cycles; i < cycles; i++) |
0bf60745 | 6058 | rt->units[i] = xcalloc (rt->num_units, sizeof (unsigned char)); |
7fa3d080 BW |
6059 | } |
6060 | ||
6061 | ||
c138bc38 | 6062 | bfd_boolean |
7fa3d080 BW |
6063 | resources_available (resource_table *rt, xtensa_opcode opcode, int cycle) |
6064 | { | |
6065 | int i; | |
6066 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6067 | ||
c138bc38 | 6068 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6069 | { |
6070 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6071 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
6072 | int copies_in_use = rt->units[stage + cycle][unit]; | |
6073 | int copies = (rt->unit_num_copies) (rt->data, unit); | |
6074 | if (copies_in_use >= copies) | |
6075 | return FALSE; | |
6076 | } | |
6077 | return TRUE; | |
6078 | } | |
7fa3d080 | 6079 | |
c138bc38 BW |
6080 | |
6081 | void | |
7fa3d080 BW |
6082 | reserve_resources (resource_table *rt, xtensa_opcode opcode, int cycle) |
6083 | { | |
6084 | int i; | |
6085 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6086 | ||
c138bc38 | 6087 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6088 | { |
6089 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6090 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
c138bc38 BW |
6091 | /* Note that this allows resources to be oversubscribed. That's |
6092 | essential to the way the optional scheduler works. | |
7fa3d080 BW |
6093 | resources_available reports when a resource is over-subscribed, |
6094 | so it's easy to tell. */ | |
6095 | rt->units[stage + cycle][unit]++; | |
6096 | } | |
6097 | } | |
6098 | ||
6099 | ||
c138bc38 | 6100 | void |
7fa3d080 BW |
6101 | release_resources (resource_table *rt, xtensa_opcode opcode, int cycle) |
6102 | { | |
6103 | int i; | |
6104 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6105 | ||
c138bc38 | 6106 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6107 | { |
6108 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6109 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
9c2799c2 | 6110 | gas_assert (rt->units[stage + cycle][unit] > 0); |
7fa3d080 | 6111 | rt->units[stage + cycle][unit]--; |
7fa3d080 BW |
6112 | } |
6113 | } | |
c138bc38 | 6114 | |
7fa3d080 BW |
6115 | |
6116 | /* Wrapper functions make parameterized resource reservation | |
6117 | more convenient. */ | |
6118 | ||
c138bc38 | 6119 | int |
7fa3d080 BW |
6120 | opcode_funcUnit_use_unit (void *data, xtensa_opcode opcode, int idx) |
6121 | { | |
6122 | xtensa_funcUnit_use *use = xtensa_opcode_funcUnit_use (data, opcode, idx); | |
c138bc38 | 6123 | return use->unit; |
7fa3d080 BW |
6124 | } |
6125 | ||
6126 | ||
c138bc38 | 6127 | int |
7fa3d080 BW |
6128 | opcode_funcUnit_use_stage (void *data, xtensa_opcode opcode, int idx) |
6129 | { | |
6130 | xtensa_funcUnit_use *use = xtensa_opcode_funcUnit_use (data, opcode, idx); | |
6131 | return use->stage; | |
6132 | } | |
6133 | ||
6134 | ||
6135 | /* Note that this function does not check issue constraints, but | |
6136 | solely whether the hardware is available to execute the given | |
c138bc38 | 6137 | instructions together. It also doesn't check if the tinsns |
7fa3d080 | 6138 | write the same state, or access the same tieports. That is |
a1ace8d8 | 6139 | checked by check_t1_t2_reads_and_writes. */ |
7fa3d080 BW |
6140 | |
6141 | static bfd_boolean | |
6142 | resources_conflict (vliw_insn *vinsn) | |
6143 | { | |
6144 | int i; | |
6145 | static resource_table *rt = NULL; | |
6146 | ||
6147 | /* This is the most common case by far. Optimize it. */ | |
6148 | if (vinsn->num_slots == 1) | |
6149 | return FALSE; | |
43cd72b9 | 6150 | |
c138bc38 | 6151 | if (rt == NULL) |
7fa3d080 BW |
6152 | { |
6153 | xtensa_isa isa = xtensa_default_isa; | |
6154 | rt = new_resource_table | |
77cba8a3 | 6155 | (isa, xtensa_num_pipe_stages, |
7fa3d080 BW |
6156 | xtensa_isa_num_funcUnits (isa), |
6157 | (unit_num_copies_func) xtensa_funcUnit_num_copies, | |
6158 | (opcode_num_units_func) xtensa_opcode_num_funcUnit_uses, | |
6159 | opcode_funcUnit_use_unit, | |
6160 | opcode_funcUnit_use_stage); | |
6161 | } | |
43cd72b9 | 6162 | |
7fa3d080 | 6163 | clear_resource_table (rt); |
43cd72b9 | 6164 | |
7fa3d080 BW |
6165 | for (i = 0; i < vinsn->num_slots; i++) |
6166 | { | |
6167 | if (!resources_available (rt, vinsn->slots[i].opcode, 0)) | |
6168 | return TRUE; | |
6169 | reserve_resources (rt, vinsn->slots[i].opcode, 0); | |
6170 | } | |
e0001a05 | 6171 | |
7fa3d080 BW |
6172 | return FALSE; |
6173 | } | |
e0001a05 | 6174 | |
7fa3d080 BW |
6175 | \f |
6176 | /* finish_vinsn, emit_single_op and helper functions. */ | |
e0001a05 | 6177 | |
7fa3d080 BW |
6178 | static bfd_boolean find_vinsn_conflicts (vliw_insn *); |
6179 | static xtensa_format xg_find_narrowest_format (vliw_insn *); | |
7fa3d080 | 6180 | static void xg_assemble_vliw_tokens (vliw_insn *); |
e0001a05 NC |
6181 | |
6182 | ||
43cd72b9 BW |
6183 | /* We have reached the end of a bundle; emit into the frag. */ |
6184 | ||
e0001a05 | 6185 | static void |
7fa3d080 | 6186 | finish_vinsn (vliw_insn *vinsn) |
e0001a05 | 6187 | { |
43cd72b9 BW |
6188 | IStack slotstack; |
6189 | int i; | |
6190 | char *file_name; | |
d77b99c9 | 6191 | unsigned line; |
e0001a05 | 6192 | |
43cd72b9 | 6193 | if (find_vinsn_conflicts (vinsn)) |
a1ace8d8 BW |
6194 | { |
6195 | xg_clear_vinsn (vinsn); | |
6196 | return; | |
6197 | } | |
43cd72b9 BW |
6198 | |
6199 | /* First, find a format that works. */ | |
6200 | if (vinsn->format == XTENSA_UNDEFINED) | |
6201 | vinsn->format = xg_find_narrowest_format (vinsn); | |
6202 | ||
19fc3723 SA |
6203 | if (xtensa_format_num_slots (xtensa_default_isa, vinsn->format) > 1 |
6204 | && produce_flix == FLIX_NONE) | |
6205 | { | |
6206 | as_bad (_("The option \"--no-allow-flix\" prohibits multi-slot flix.")); | |
6207 | xg_clear_vinsn (vinsn); | |
6208 | return; | |
6209 | } | |
6210 | ||
43cd72b9 BW |
6211 | if (vinsn->format == XTENSA_UNDEFINED) |
6212 | { | |
6213 | as_where (&file_name, &line); | |
6214 | as_bad_where (file_name, line, | |
6215 | _("couldn't find a valid instruction format")); | |
6216 | fprintf (stderr, _(" ops were: ")); | |
6217 | for (i = 0; i < vinsn->num_slots; i++) | |
6218 | fprintf (stderr, _(" %s;"), | |
6219 | xtensa_opcode_name (xtensa_default_isa, | |
6220 | vinsn->slots[i].opcode)); | |
6221 | fprintf (stderr, _("\n")); | |
6222 | xg_clear_vinsn (vinsn); | |
6223 | return; | |
6224 | } | |
6225 | ||
6226 | if (vinsn->num_slots | |
6227 | != xtensa_format_num_slots (xtensa_default_isa, vinsn->format)) | |
e0001a05 | 6228 | { |
43cd72b9 BW |
6229 | as_bad (_("format '%s' allows %d slots, but there are %d opcodes"), |
6230 | xtensa_format_name (xtensa_default_isa, vinsn->format), | |
6231 | xtensa_format_num_slots (xtensa_default_isa, vinsn->format), | |
6232 | vinsn->num_slots); | |
6233 | xg_clear_vinsn (vinsn); | |
6234 | return; | |
6235 | } | |
e0001a05 | 6236 | |
c138bc38 | 6237 | if (resources_conflict (vinsn)) |
43cd72b9 BW |
6238 | { |
6239 | as_where (&file_name, &line); | |
6240 | as_bad_where (file_name, line, _("illegal resource usage in bundle")); | |
6241 | fprintf (stderr, " ops were: "); | |
6242 | for (i = 0; i < vinsn->num_slots; i++) | |
6243 | fprintf (stderr, " %s;", | |
6244 | xtensa_opcode_name (xtensa_default_isa, | |
6245 | vinsn->slots[i].opcode)); | |
6246 | fprintf (stderr, "\n"); | |
6247 | xg_clear_vinsn (vinsn); | |
6248 | return; | |
6249 | } | |
6250 | ||
6251 | for (i = 0; i < vinsn->num_slots; i++) | |
6252 | { | |
6253 | if (vinsn->slots[i].opcode != XTENSA_UNDEFINED) | |
e0001a05 | 6254 | { |
43cd72b9 BW |
6255 | symbolS *lit_sym = NULL; |
6256 | int j; | |
6257 | bfd_boolean e = FALSE; | |
6258 | bfd_boolean saved_density = density_supported; | |
6259 | ||
6260 | /* We don't want to narrow ops inside multi-slot bundles. */ | |
6261 | if (vinsn->num_slots > 1) | |
6262 | density_supported = FALSE; | |
6263 | ||
6264 | istack_init (&slotstack); | |
6265 | if (vinsn->slots[i].opcode == xtensa_nop_opcode) | |
e0001a05 | 6266 | { |
43cd72b9 BW |
6267 | vinsn->slots[i].opcode = |
6268 | xtensa_format_slot_nop_opcode (xtensa_default_isa, | |
6269 | vinsn->format, i); | |
6270 | vinsn->slots[i].ntok = 0; | |
6271 | } | |
e0001a05 | 6272 | |
43cd72b9 BW |
6273 | if (xg_expand_assembly_insn (&slotstack, &vinsn->slots[i])) |
6274 | { | |
6275 | e = TRUE; | |
6276 | continue; | |
e0001a05 | 6277 | } |
e0001a05 | 6278 | |
43cd72b9 | 6279 | density_supported = saved_density; |
e0001a05 | 6280 | |
43cd72b9 BW |
6281 | if (e) |
6282 | { | |
6283 | xg_clear_vinsn (vinsn); | |
6284 | return; | |
6285 | } | |
e0001a05 | 6286 | |
0fa77c95 | 6287 | for (j = 0; j < slotstack.ninsn; j++) |
43cd72b9 BW |
6288 | { |
6289 | TInsn *insn = &slotstack.insn[j]; | |
6290 | if (insn->insn_type == ITYPE_LITERAL) | |
6291 | { | |
9c2799c2 | 6292 | gas_assert (lit_sym == NULL); |
43cd72b9 BW |
6293 | lit_sym = xg_assemble_literal (insn); |
6294 | } | |
6295 | else | |
6296 | { | |
9c2799c2 | 6297 | gas_assert (insn->insn_type == ITYPE_INSN); |
43cd72b9 BW |
6298 | if (lit_sym) |
6299 | xg_resolve_literals (insn, lit_sym); | |
0fa77c95 BW |
6300 | if (j != slotstack.ninsn - 1) |
6301 | emit_single_op (insn); | |
43cd72b9 BW |
6302 | } |
6303 | } | |
6304 | ||
6305 | if (vinsn->num_slots > 1) | |
6306 | { | |
6307 | if (opcode_fits_format_slot | |
6308 | (slotstack.insn[slotstack.ninsn - 1].opcode, | |
6309 | vinsn->format, i)) | |
6310 | { | |
6311 | vinsn->slots[i] = slotstack.insn[slotstack.ninsn - 1]; | |
6312 | } | |
6313 | else | |
6314 | { | |
b2d179be | 6315 | emit_single_op (&slotstack.insn[slotstack.ninsn - 1]); |
43cd72b9 BW |
6316 | if (vinsn->format == XTENSA_UNDEFINED) |
6317 | vinsn->slots[i].opcode = xtensa_nop_opcode; | |
6318 | else | |
c138bc38 | 6319 | vinsn->slots[i].opcode |
43cd72b9 BW |
6320 | = xtensa_format_slot_nop_opcode (xtensa_default_isa, |
6321 | vinsn->format, i); | |
6322 | ||
6323 | vinsn->slots[i].ntok = 0; | |
6324 | } | |
6325 | } | |
6326 | else | |
6327 | { | |
6328 | vinsn->slots[0] = slotstack.insn[slotstack.ninsn - 1]; | |
6329 | vinsn->format = XTENSA_UNDEFINED; | |
6330 | } | |
6331 | } | |
6332 | } | |
6333 | ||
6334 | /* Now check resource conflicts on the modified bundle. */ | |
c138bc38 | 6335 | if (resources_conflict (vinsn)) |
43cd72b9 BW |
6336 | { |
6337 | as_where (&file_name, &line); | |
6338 | as_bad_where (file_name, line, _("illegal resource usage in bundle")); | |
6339 | fprintf (stderr, " ops were: "); | |
6340 | for (i = 0; i < vinsn->num_slots; i++) | |
6341 | fprintf (stderr, " %s;", | |
6342 | xtensa_opcode_name (xtensa_default_isa, | |
6343 | vinsn->slots[i].opcode)); | |
6344 | fprintf (stderr, "\n"); | |
6345 | xg_clear_vinsn (vinsn); | |
6346 | return; | |
6347 | } | |
6348 | ||
6349 | /* First, find a format that works. */ | |
6350 | if (vinsn->format == XTENSA_UNDEFINED) | |
6351 | vinsn->format = xg_find_narrowest_format (vinsn); | |
6352 | ||
6353 | xg_assemble_vliw_tokens (vinsn); | |
6354 | ||
6355 | xg_clear_vinsn (vinsn); | |
6356 | } | |
6357 | ||
6358 | ||
6359 | /* Given an vliw instruction, what conflicts are there in register | |
6360 | usage and in writes to states and queues? | |
6361 | ||
6362 | This function does two things: | |
6363 | 1. Reports an error when a vinsn contains illegal combinations | |
6364 | of writes to registers states or queues. | |
6365 | 2. Marks individual tinsns as not relaxable if the combination | |
6366 | contains antidependencies. | |
6367 | ||
6368 | Job 2 handles things like swap semantics in instructions that need | |
6369 | to be relaxed. For example, | |
6370 | ||
6371 | addi a0, a1, 100000 | |
6372 | ||
6373 | normally would be relaxed to | |
6374 | ||
6375 | l32r a0, some_label | |
6376 | add a0, a1, a0 | |
6377 | ||
6378 | _but_, if the above instruction is bundled with an a0 reader, e.g., | |
6379 | ||
6380 | { addi a0, a1, 10000 ; add a2, a0, a4 ; } | |
6381 | ||
6382 | then we can't relax it into | |
6383 | ||
6384 | l32r a0, some_label | |
6385 | { add a0, a1, a0 ; add a2, a0, a4 ; } | |
6386 | ||
6387 | because the value of a0 is trashed before the second add can read it. */ | |
6388 | ||
7fa3d080 BW |
6389 | static char check_t1_t2_reads_and_writes (TInsn *, TInsn *); |
6390 | ||
43cd72b9 | 6391 | static bfd_boolean |
7fa3d080 | 6392 | find_vinsn_conflicts (vliw_insn *vinsn) |
43cd72b9 BW |
6393 | { |
6394 | int i, j; | |
6395 | int branches = 0; | |
6396 | xtensa_isa isa = xtensa_default_isa; | |
6397 | ||
9c2799c2 | 6398 | gas_assert (!past_xtensa_end); |
43cd72b9 BW |
6399 | |
6400 | for (i = 0 ; i < vinsn->num_slots; i++) | |
6401 | { | |
6402 | TInsn *op1 = &vinsn->slots[i]; | |
6403 | if (op1->is_specific_opcode) | |
6404 | op1->keep_wide = TRUE; | |
6405 | else | |
6406 | op1->keep_wide = FALSE; | |
6407 | } | |
6408 | ||
6409 | for (i = 0 ; i < vinsn->num_slots; i++) | |
6410 | { | |
6411 | TInsn *op1 = &vinsn->slots[i]; | |
6412 | ||
6413 | if (xtensa_opcode_is_branch (isa, op1->opcode) == 1) | |
6414 | branches++; | |
6415 | ||
6416 | for (j = 0; j < vinsn->num_slots; j++) | |
6417 | { | |
6418 | if (i != j) | |
6419 | { | |
6420 | TInsn *op2 = &vinsn->slots[j]; | |
6421 | char conflict_type = check_t1_t2_reads_and_writes (op1, op2); | |
6422 | switch (conflict_type) | |
6423 | { | |
6424 | case 'c': | |
6425 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same register"), | |
6426 | xtensa_opcode_name (isa, op1->opcode), i, | |
6427 | xtensa_opcode_name (isa, op2->opcode), j); | |
6428 | return TRUE; | |
6429 | case 'd': | |
6430 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same state"), | |
6431 | xtensa_opcode_name (isa, op1->opcode), i, | |
6432 | xtensa_opcode_name (isa, op2->opcode), j); | |
6433 | return TRUE; | |
6434 | case 'e': | |
53dfbcc7 | 6435 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same port"), |
43cd72b9 BW |
6436 | xtensa_opcode_name (isa, op1->opcode), i, |
6437 | xtensa_opcode_name (isa, op2->opcode), j); | |
6438 | return TRUE; | |
6439 | case 'f': | |
53dfbcc7 | 6440 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) both have volatile port accesses"), |
43cd72b9 BW |
6441 | xtensa_opcode_name (isa, op1->opcode), i, |
6442 | xtensa_opcode_name (isa, op2->opcode), j); | |
6443 | return TRUE; | |
6444 | default: | |
6445 | /* Everything is OK. */ | |
6446 | break; | |
6447 | } | |
6448 | op2->is_specific_opcode = (op2->is_specific_opcode | |
6449 | || conflict_type == 'a'); | |
6450 | } | |
6451 | } | |
6452 | } | |
6453 | ||
6454 | if (branches > 1) | |
6455 | { | |
6456 | as_bad (_("multiple branches or jumps in the same bundle")); | |
6457 | return TRUE; | |
6458 | } | |
6459 | ||
6460 | return FALSE; | |
6461 | } | |
6462 | ||
6463 | ||
a1ace8d8 | 6464 | /* Check how the state used by t1 and t2 relate. |
43cd72b9 BW |
6465 | Cases found are: |
6466 | ||
6467 | case A: t1 reads a register t2 writes (an antidependency within a bundle) | |
6468 | case B: no relationship between what is read and written (both could | |
6469 | read the same reg though) | |
c138bc38 | 6470 | case C: t1 writes a register t2 writes (a register conflict within a |
43cd72b9 BW |
6471 | bundle) |
6472 | case D: t1 writes a state that t2 also writes | |
6473 | case E: t1 writes a tie queue that t2 also writes | |
a1ace8d8 | 6474 | case F: two volatile queue accesses |
43cd72b9 BW |
6475 | */ |
6476 | ||
6477 | static char | |
7fa3d080 | 6478 | check_t1_t2_reads_and_writes (TInsn *t1, TInsn *t2) |
43cd72b9 BW |
6479 | { |
6480 | xtensa_isa isa = xtensa_default_isa; | |
6481 | xtensa_regfile t1_regfile, t2_regfile; | |
6482 | int t1_reg, t2_reg; | |
6483 | int t1_base_reg, t1_last_reg; | |
6484 | int t2_base_reg, t2_last_reg; | |
6485 | char t1_inout, t2_inout; | |
6486 | int i, j; | |
6487 | char conflict = 'b'; | |
6488 | int t1_states; | |
6489 | int t2_states; | |
6490 | int t1_interfaces; | |
6491 | int t2_interfaces; | |
6492 | bfd_boolean t1_volatile = FALSE; | |
6493 | bfd_boolean t2_volatile = FALSE; | |
6494 | ||
6495 | /* Check registers. */ | |
6496 | for (j = 0; j < t2->ntok; j++) | |
6497 | { | |
6498 | if (xtensa_operand_is_register (isa, t2->opcode, j) != 1) | |
6499 | continue; | |
6500 | ||
6501 | t2_regfile = xtensa_operand_regfile (isa, t2->opcode, j); | |
6502 | t2_base_reg = t2->tok[j].X_add_number; | |
6503 | t2_last_reg = t2_base_reg + xtensa_operand_num_regs (isa, t2->opcode, j); | |
6504 | ||
6505 | for (i = 0; i < t1->ntok; i++) | |
6506 | { | |
6507 | if (xtensa_operand_is_register (isa, t1->opcode, i) != 1) | |
6508 | continue; | |
6509 | ||
6510 | t1_regfile = xtensa_operand_regfile (isa, t1->opcode, i); | |
6511 | ||
6512 | if (t1_regfile != t2_regfile) | |
6513 | continue; | |
6514 | ||
6515 | t1_inout = xtensa_operand_inout (isa, t1->opcode, i); | |
6516 | t2_inout = xtensa_operand_inout (isa, t2->opcode, j); | |
6517 | ||
6518 | if (xtensa_operand_is_known_reg (isa, t1->opcode, i) == 0 | |
6519 | || xtensa_operand_is_known_reg (isa, t2->opcode, j) == 0) | |
6520 | { | |
6521 | if (t1_inout == 'm' || t1_inout == 'o' | |
6522 | || t2_inout == 'm' || t2_inout == 'o') | |
6523 | { | |
6524 | conflict = 'a'; | |
6525 | continue; | |
6526 | } | |
6527 | } | |
6528 | ||
6529 | t1_base_reg = t1->tok[i].X_add_number; | |
6530 | t1_last_reg = (t1_base_reg | |
6531 | + xtensa_operand_num_regs (isa, t1->opcode, i)); | |
6532 | ||
6533 | for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++) | |
6534 | { | |
6535 | for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++) | |
6536 | { | |
6537 | if (t1_reg != t2_reg) | |
6538 | continue; | |
6539 | ||
6540 | if (t2_inout == 'i' && (t1_inout == 'm' || t1_inout == 'o')) | |
7fa3d080 BW |
6541 | { |
6542 | conflict = 'a'; | |
6543 | continue; | |
6544 | } | |
43cd72b9 | 6545 | |
7fa3d080 BW |
6546 | if (t1_inout == 'i' && (t2_inout == 'm' || t2_inout == 'o')) |
6547 | { | |
6548 | conflict = 'a'; | |
6549 | continue; | |
6550 | } | |
43cd72b9 | 6551 | |
7fa3d080 BW |
6552 | if (t1_inout != 'i' && t2_inout != 'i') |
6553 | return 'c'; | |
6554 | } | |
6555 | } | |
6556 | } | |
6557 | } | |
43cd72b9 | 6558 | |
7fa3d080 BW |
6559 | /* Check states. */ |
6560 | t1_states = xtensa_opcode_num_stateOperands (isa, t1->opcode); | |
6561 | t2_states = xtensa_opcode_num_stateOperands (isa, t2->opcode); | |
6562 | for (j = 0; j < t2_states; j++) | |
43cd72b9 | 6563 | { |
7fa3d080 BW |
6564 | xtensa_state t2_so = xtensa_stateOperand_state (isa, t2->opcode, j); |
6565 | t2_inout = xtensa_stateOperand_inout (isa, t2->opcode, j); | |
6566 | for (i = 0; i < t1_states; i++) | |
6567 | { | |
6568 | xtensa_state t1_so = xtensa_stateOperand_state (isa, t1->opcode, i); | |
6569 | t1_inout = xtensa_stateOperand_inout (isa, t1->opcode, i); | |
1fa3cd83 | 6570 | if (t1_so != t2_so || xtensa_state_is_shared_or (isa, t1_so) == 1) |
7fa3d080 | 6571 | continue; |
43cd72b9 | 6572 | |
7fa3d080 BW |
6573 | if (t2_inout == 'i' && (t1_inout == 'm' || t1_inout == 'o')) |
6574 | { | |
6575 | conflict = 'a'; | |
6576 | continue; | |
6577 | } | |
c138bc38 | 6578 | |
7fa3d080 BW |
6579 | if (t1_inout == 'i' && (t2_inout == 'm' || t2_inout == 'o')) |
6580 | { | |
6581 | conflict = 'a'; | |
6582 | continue; | |
6583 | } | |
c138bc38 | 6584 | |
7fa3d080 BW |
6585 | if (t1_inout != 'i' && t2_inout != 'i') |
6586 | return 'd'; | |
c138bc38 | 6587 | } |
7fa3d080 | 6588 | } |
43cd72b9 | 6589 | |
7fa3d080 BW |
6590 | /* Check tieports. */ |
6591 | t1_interfaces = xtensa_opcode_num_interfaceOperands (isa, t1->opcode); | |
6592 | t2_interfaces = xtensa_opcode_num_interfaceOperands (isa, t2->opcode); | |
c138bc38 | 6593 | for (j = 0; j < t2_interfaces; j++) |
43cd72b9 | 6594 | { |
7fa3d080 BW |
6595 | xtensa_interface t2_int |
6596 | = xtensa_interfaceOperand_interface (isa, t2->opcode, j); | |
a1ace8d8 BW |
6597 | int t2_class = xtensa_interface_class_id (isa, t2_int); |
6598 | ||
53dfbcc7 | 6599 | t2_inout = xtensa_interface_inout (isa, t2_int); |
a1ace8d8 | 6600 | if (xtensa_interface_has_side_effect (isa, t2_int) == 1) |
7fa3d080 | 6601 | t2_volatile = TRUE; |
a1ace8d8 | 6602 | |
7fa3d080 BW |
6603 | for (i = 0; i < t1_interfaces; i++) |
6604 | { | |
6605 | xtensa_interface t1_int | |
6606 | = xtensa_interfaceOperand_interface (isa, t1->opcode, j); | |
2eccd1b4 | 6607 | int t1_class = xtensa_interface_class_id (isa, t1_int); |
a1ace8d8 | 6608 | |
53dfbcc7 | 6609 | t1_inout = xtensa_interface_inout (isa, t1_int); |
a1ace8d8 | 6610 | if (xtensa_interface_has_side_effect (isa, t1_int) == 1) |
7fa3d080 | 6611 | t1_volatile = TRUE; |
a1ace8d8 BW |
6612 | |
6613 | if (t1_volatile && t2_volatile && (t1_class == t2_class)) | |
6614 | return 'f'; | |
c138bc38 | 6615 | |
7fa3d080 BW |
6616 | if (t1_int != t2_int) |
6617 | continue; | |
c138bc38 | 6618 | |
7fa3d080 BW |
6619 | if (t2_inout == 'i' && t1_inout == 'o') |
6620 | { | |
6621 | conflict = 'a'; | |
6622 | continue; | |
6623 | } | |
c138bc38 | 6624 | |
7fa3d080 BW |
6625 | if (t1_inout == 'i' && t2_inout == 'o') |
6626 | { | |
6627 | conflict = 'a'; | |
6628 | continue; | |
6629 | } | |
c138bc38 | 6630 | |
7fa3d080 BW |
6631 | if (t1_inout != 'i' && t2_inout != 'i') |
6632 | return 'e'; | |
6633 | } | |
43cd72b9 | 6634 | } |
c138bc38 | 6635 | |
7fa3d080 | 6636 | return conflict; |
43cd72b9 BW |
6637 | } |
6638 | ||
6639 | ||
6640 | static xtensa_format | |
7fa3d080 | 6641 | xg_find_narrowest_format (vliw_insn *vinsn) |
43cd72b9 BW |
6642 | { |
6643 | /* Right now we assume that the ops within the vinsn are properly | |
6644 | ordered for the slots that the programmer wanted them in. In | |
6645 | other words, we don't rearrange the ops in hopes of finding a | |
6646 | better format. The scheduler handles that. */ | |
6647 | ||
6648 | xtensa_isa isa = xtensa_default_isa; | |
6649 | xtensa_format format; | |
43cd72b9 BW |
6650 | xtensa_opcode nop_opcode = xtensa_nop_opcode; |
6651 | ||
65738a7d BW |
6652 | if (vinsn->num_slots == 1) |
6653 | return xg_get_single_format (vinsn->slots[0].opcode); | |
6654 | ||
43cd72b9 BW |
6655 | for (format = 0; format < xtensa_isa_num_formats (isa); format++) |
6656 | { | |
d8392fd9 SA |
6657 | vliw_insn v_copy; |
6658 | xg_copy_vinsn (&v_copy, vinsn); | |
43cd72b9 BW |
6659 | if (xtensa_format_num_slots (isa, format) == v_copy.num_slots) |
6660 | { | |
6661 | int slot; | |
6662 | int fit = 0; | |
6663 | for (slot = 0; slot < v_copy.num_slots; slot++) | |
6664 | { | |
6665 | if (v_copy.slots[slot].opcode == nop_opcode) | |
6666 | { | |
6667 | v_copy.slots[slot].opcode = | |
6668 | xtensa_format_slot_nop_opcode (isa, format, slot); | |
6669 | v_copy.slots[slot].ntok = 0; | |
6670 | } | |
6671 | ||
6672 | if (opcode_fits_format_slot (v_copy.slots[slot].opcode, | |
6673 | format, slot)) | |
6674 | fit++; | |
7fa3d080 | 6675 | else if (v_copy.num_slots > 1) |
43cd72b9 | 6676 | { |
7fa3d080 BW |
6677 | TInsn widened; |
6678 | /* Try the widened version. */ | |
6679 | if (!v_copy.slots[slot].keep_wide | |
6680 | && !v_copy.slots[slot].is_specific_opcode | |
84b08ed9 BW |
6681 | && xg_is_single_relaxable_insn (&v_copy.slots[slot], |
6682 | &widened, TRUE) | |
7fa3d080 BW |
6683 | && opcode_fits_format_slot (widened.opcode, |
6684 | format, slot)) | |
43cd72b9 | 6685 | { |
7fa3d080 BW |
6686 | v_copy.slots[slot] = widened; |
6687 | fit++; | |
43cd72b9 BW |
6688 | } |
6689 | } | |
6690 | } | |
6691 | if (fit == v_copy.num_slots) | |
6692 | { | |
d8392fd9 | 6693 | xg_copy_vinsn (vinsn, &v_copy); |
43cd72b9 BW |
6694 | xtensa_format_encode (isa, format, vinsn->insnbuf); |
6695 | vinsn->format = format; | |
6696 | break; | |
6697 | } | |
6698 | } | |
6699 | } | |
6700 | ||
6701 | if (format == xtensa_isa_num_formats (isa)) | |
6702 | return XTENSA_UNDEFINED; | |
6703 | ||
6704 | return format; | |
6705 | } | |
6706 | ||
6707 | ||
6708 | /* Return the additional space needed in a frag | |
6709 | for possible relaxations of any ops in a VLIW insn. | |
6710 | Also fill out the relaxations that might be required of | |
6711 | each tinsn in the vinsn. */ | |
6712 | ||
6713 | static int | |
e7da6241 | 6714 | relaxation_requirements (vliw_insn *vinsn, bfd_boolean *pfinish_frag) |
43cd72b9 | 6715 | { |
e7da6241 | 6716 | bfd_boolean finish_frag = FALSE; |
43cd72b9 BW |
6717 | int extra_space = 0; |
6718 | int slot; | |
6719 | ||
6720 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
6721 | { | |
6722 | TInsn *tinsn = &vinsn->slots[slot]; | |
6723 | if (!tinsn_has_symbolic_operands (tinsn)) | |
6724 | { | |
6725 | /* A narrow instruction could be widened later to help | |
6726 | alignment issues. */ | |
84b08ed9 | 6727 | if (xg_is_single_relaxable_insn (tinsn, 0, TRUE) |
43cd72b9 BW |
6728 | && !tinsn->is_specific_opcode |
6729 | && vinsn->num_slots == 1) | |
6730 | { | |
6731 | /* Difference in bytes between narrow and wide insns... */ | |
6732 | extra_space += 1; | |
6733 | tinsn->subtype = RELAX_NARROW; | |
43cd72b9 BW |
6734 | } |
6735 | } | |
6736 | else | |
6737 | { | |
b08b5071 BW |
6738 | if (workaround_b_j_loop_end |
6739 | && tinsn->opcode == xtensa_jx_opcode | |
43cd72b9 BW |
6740 | && use_transform ()) |
6741 | { | |
6742 | /* Add 2 of these. */ | |
6743 | extra_space += 3; /* for the nop size */ | |
6744 | tinsn->subtype = RELAX_ADD_NOP_IF_PRE_LOOP_END; | |
6745 | } | |
c138bc38 | 6746 | |
43cd72b9 BW |
6747 | /* Need to assemble it with space for the relocation. */ |
6748 | if (xg_is_relaxable_insn (tinsn, 0) | |
6749 | && !tinsn->is_specific_opcode) | |
6750 | { | |
6751 | int max_size = xg_get_max_insn_widen_size (tinsn->opcode); | |
6752 | int max_literal_size = | |
6753 | xg_get_max_insn_widen_literal_size (tinsn->opcode); | |
c138bc38 | 6754 | |
43cd72b9 | 6755 | tinsn->literal_space = max_literal_size; |
c138bc38 | 6756 | |
43cd72b9 | 6757 | tinsn->subtype = RELAX_IMMED; |
43cd72b9 BW |
6758 | extra_space += max_size; |
6759 | } | |
6760 | else | |
6761 | { | |
e7da6241 BW |
6762 | /* A fix record will be added for this instruction prior |
6763 | to relaxation, so make it end the frag. */ | |
6764 | finish_frag = TRUE; | |
43cd72b9 BW |
6765 | } |
6766 | } | |
6767 | } | |
e7da6241 | 6768 | *pfinish_frag = finish_frag; |
43cd72b9 BW |
6769 | return extra_space; |
6770 | } | |
6771 | ||
6772 | ||
6773 | static void | |
b2d179be | 6774 | bundle_tinsn (TInsn *tinsn, vliw_insn *vinsn) |
43cd72b9 BW |
6775 | { |
6776 | xtensa_isa isa = xtensa_default_isa; | |
b2d179be | 6777 | int slot, chosen_slot; |
43cd72b9 | 6778 | |
b2d179be | 6779 | vinsn->format = xg_get_single_format (tinsn->opcode); |
9c2799c2 | 6780 | gas_assert (vinsn->format != XTENSA_UNDEFINED); |
b2d179be | 6781 | vinsn->num_slots = xtensa_format_num_slots (isa, vinsn->format); |
43cd72b9 | 6782 | |
b2d179be BW |
6783 | chosen_slot = xg_get_single_slot (tinsn->opcode); |
6784 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
43cd72b9 | 6785 | { |
b2d179be BW |
6786 | if (slot == chosen_slot) |
6787 | vinsn->slots[slot] = *tinsn; | |
6788 | else | |
6789 | { | |
6790 | vinsn->slots[slot].opcode = | |
6791 | xtensa_format_slot_nop_opcode (isa, vinsn->format, slot); | |
6792 | vinsn->slots[slot].ntok = 0; | |
6793 | vinsn->slots[slot].insn_type = ITYPE_INSN; | |
6794 | } | |
43cd72b9 | 6795 | } |
43cd72b9 BW |
6796 | } |
6797 | ||
6798 | ||
6799 | static bfd_boolean | |
7fa3d080 | 6800 | emit_single_op (TInsn *orig_insn) |
43cd72b9 BW |
6801 | { |
6802 | int i; | |
6803 | IStack istack; /* put instructions into here */ | |
6804 | symbolS *lit_sym = NULL; | |
6805 | symbolS *label_sym = NULL; | |
6806 | ||
6807 | istack_init (&istack); | |
6808 | ||
6809 | /* Special-case for "movi aX, foo" which is guaranteed to need relaxing. | |
c138bc38 BW |
6810 | Because the scheduling and bundling characteristics of movi and |
6811 | l32r or const16 are so different, we can do much better if we relax | |
43cd72b9 | 6812 | it prior to scheduling and bundling, rather than after. */ |
c138bc38 | 6813 | if ((orig_insn->opcode == xtensa_movi_opcode |
b08b5071 BW |
6814 | || orig_insn->opcode == xtensa_movi_n_opcode) |
6815 | && !cur_vinsn.inside_bundle | |
43cd72b9 | 6816 | && (orig_insn->tok[1].X_op == O_symbol |
28dbbc02 BW |
6817 | || orig_insn->tok[1].X_op == O_pltrel |
6818 | || orig_insn->tok[1].X_op == O_tlsfunc | |
6819 | || orig_insn->tok[1].X_op == O_tlsarg | |
6820 | || orig_insn->tok[1].X_op == O_tpoff | |
6821 | || orig_insn->tok[1].X_op == O_dtpoff) | |
482fd9f9 | 6822 | && !orig_insn->is_specific_opcode && use_transform ()) |
43cd72b9 BW |
6823 | xg_assembly_relax (&istack, orig_insn, now_seg, frag_now, 0, 1, 0); |
6824 | else | |
6825 | if (xg_expand_assembly_insn (&istack, orig_insn)) | |
6826 | return TRUE; | |
6827 | ||
6828 | for (i = 0; i < istack.ninsn; i++) | |
6829 | { | |
6830 | TInsn *insn = &istack.insn[i]; | |
c138bc38 | 6831 | switch (insn->insn_type) |
43cd72b9 BW |
6832 | { |
6833 | case ITYPE_LITERAL: | |
9c2799c2 | 6834 | gas_assert (lit_sym == NULL); |
43cd72b9 BW |
6835 | lit_sym = xg_assemble_literal (insn); |
6836 | break; | |
6837 | case ITYPE_LABEL: | |
6838 | { | |
6839 | static int relaxed_sym_idx = 0; | |
6840 | char *label = xmalloc (strlen (FAKE_LABEL_NAME) + 12); | |
6841 | sprintf (label, "%s_rl_%x", FAKE_LABEL_NAME, relaxed_sym_idx++); | |
6842 | colon (label); | |
9c2799c2 | 6843 | gas_assert (label_sym == NULL); |
43cd72b9 | 6844 | label_sym = symbol_find_or_make (label); |
9c2799c2 | 6845 | gas_assert (label_sym); |
43cd72b9 BW |
6846 | free (label); |
6847 | } | |
6848 | break; | |
6849 | case ITYPE_INSN: | |
b2d179be BW |
6850 | { |
6851 | vliw_insn v; | |
6852 | if (lit_sym) | |
6853 | xg_resolve_literals (insn, lit_sym); | |
6854 | if (label_sym) | |
6855 | xg_resolve_labels (insn, label_sym); | |
6856 | xg_init_vinsn (&v); | |
6857 | bundle_tinsn (insn, &v); | |
6858 | finish_vinsn (&v); | |
6859 | xg_free_vinsn (&v); | |
6860 | } | |
43cd72b9 BW |
6861 | break; |
6862 | default: | |
9c2799c2 | 6863 | gas_assert (0); |
43cd72b9 BW |
6864 | break; |
6865 | } | |
6866 | } | |
6867 | return FALSE; | |
6868 | } | |
6869 | ||
6870 | ||
34e41783 BW |
6871 | static int |
6872 | total_frag_text_expansion (fragS *fragP) | |
6873 | { | |
6874 | int slot; | |
6875 | int total_expansion = 0; | |
6876 | ||
62af60e2 | 6877 | for (slot = 0; slot < config_max_slots; slot++) |
34e41783 BW |
6878 | total_expansion += fragP->tc_frag_data.text_expansion[slot]; |
6879 | ||
6880 | return total_expansion; | |
6881 | } | |
6882 | ||
6883 | ||
43cd72b9 BW |
6884 | /* Emit a vliw instruction to the current fragment. */ |
6885 | ||
7fa3d080 BW |
6886 | static void |
6887 | xg_assemble_vliw_tokens (vliw_insn *vinsn) | |
43cd72b9 | 6888 | { |
e7da6241 | 6889 | bfd_boolean finish_frag; |
43cd72b9 BW |
6890 | bfd_boolean is_jump = FALSE; |
6891 | bfd_boolean is_branch = FALSE; | |
6892 | xtensa_isa isa = xtensa_default_isa; | |
43cd72b9 BW |
6893 | int insn_size; |
6894 | int extra_space; | |
6895 | char *f = NULL; | |
6896 | int slot; | |
b224e962 BW |
6897 | struct dwarf2_line_info debug_line; |
6898 | bfd_boolean loc_directive_seen = FALSE; | |
6899 | TInsn *tinsn; | |
43cd72b9 | 6900 | |
b224e962 | 6901 | memset (&debug_line, 0, sizeof (struct dwarf2_line_info)); |
43cd72b9 BW |
6902 | |
6903 | if (generating_literals) | |
6904 | { | |
6905 | static int reported = 0; | |
6906 | if (reported < 4) | |
6907 | as_bad_where (frag_now->fr_file, frag_now->fr_line, | |
6908 | _("cannot assemble into a literal fragment")); | |
6909 | if (reported == 3) | |
6910 | as_bad (_("...")); | |
6911 | reported++; | |
6912 | return; | |
6913 | } | |
6914 | ||
6915 | if (frag_now_fix () != 0 | |
b08b5071 | 6916 | && (! frag_now->tc_frag_data.is_insn |
43cd72b9 | 6917 | || (vinsn_has_specific_opcodes (vinsn) && use_transform ()) |
b08b5071 | 6918 | || !use_transform () != frag_now->tc_frag_data.is_no_transform |
7c834684 BW |
6919 | || (directive_state[directive_longcalls] |
6920 | != frag_now->tc_frag_data.use_longcalls) | |
43cd72b9 BW |
6921 | || (directive_state[directive_absolute_literals] |
6922 | != frag_now->tc_frag_data.use_absolute_literals))) | |
6923 | { | |
6924 | frag_wane (frag_now); | |
6925 | frag_new (0); | |
6926 | xtensa_set_frag_assembly_state (frag_now); | |
6927 | } | |
6928 | ||
6929 | if (workaround_a0_b_retw | |
6930 | && vinsn->num_slots == 1 | |
6931 | && (get_last_insn_flags (now_seg, now_subseg) & FLAG_IS_A0_WRITER) != 0 | |
6932 | && xtensa_opcode_is_branch (isa, vinsn->slots[0].opcode) == 1 | |
6933 | && use_transform ()) | |
6934 | { | |
6935 | has_a0_b_retw = TRUE; | |
6936 | ||
6937 | /* Mark this fragment with the special RELAX_ADD_NOP_IF_A0_B_RETW. | |
6938 | After the first assembly pass we will check all of them and | |
6939 | add a nop if needed. */ | |
6940 | frag_now->tc_frag_data.is_insn = TRUE; | |
6941 | frag_var (rs_machine_dependent, 4, 4, | |
6942 | RELAX_ADD_NOP_IF_A0_B_RETW, | |
6943 | frag_now->fr_symbol, | |
6944 | frag_now->fr_offset, | |
6945 | NULL); | |
6946 | xtensa_set_frag_assembly_state (frag_now); | |
6947 | frag_now->tc_frag_data.is_insn = TRUE; | |
6948 | frag_var (rs_machine_dependent, 4, 4, | |
6949 | RELAX_ADD_NOP_IF_A0_B_RETW, | |
6950 | frag_now->fr_symbol, | |
6951 | frag_now->fr_offset, | |
6952 | NULL); | |
6953 | xtensa_set_frag_assembly_state (frag_now); | |
6954 | } | |
6955 | ||
b224e962 | 6956 | for (slot = 0; slot < vinsn->num_slots; slot++) |
43cd72b9 | 6957 | { |
b224e962 BW |
6958 | tinsn = &vinsn->slots[slot]; |
6959 | ||
43cd72b9 | 6960 | /* See if the instruction implies an aligned section. */ |
b224e962 | 6961 | if (xtensa_opcode_is_loop (isa, tinsn->opcode) == 1) |
43cd72b9 | 6962 | record_alignment (now_seg, 2); |
c138bc38 | 6963 | |
b224e962 BW |
6964 | /* Determine the best line number for debug info. */ |
6965 | if ((tinsn->loc_directive_seen || !loc_directive_seen) | |
6966 | && (tinsn->debug_line.filenum != debug_line.filenum | |
6967 | || tinsn->debug_line.line < debug_line.line | |
6968 | || tinsn->debug_line.column < debug_line.column)) | |
6969 | debug_line = tinsn->debug_line; | |
6970 | if (tinsn->loc_directive_seen) | |
6971 | loc_directive_seen = TRUE; | |
43cd72b9 BW |
6972 | } |
6973 | ||
6974 | /* Special cases for instructions that force an alignment... */ | |
6975 | /* None of these opcodes are bundle-able. */ | |
6976 | if (xtensa_opcode_is_loop (isa, vinsn->slots[0].opcode) == 1) | |
6977 | { | |
d77b99c9 | 6978 | int max_fill; |
c138bc38 | 6979 | |
05d58145 BW |
6980 | /* Remember the symbol that marks the end of the loop in the frag |
6981 | that marks the start of the loop. This way we can easily find | |
6982 | the end of the loop at the beginning, without adding special code | |
6983 | to mark the loop instructions themselves. */ | |
6984 | symbolS *target_sym = NULL; | |
6985 | if (vinsn->slots[0].tok[1].X_op == O_symbol) | |
6986 | target_sym = vinsn->slots[0].tok[1].X_add_symbol; | |
6987 | ||
43cd72b9 BW |
6988 | xtensa_set_frag_assembly_state (frag_now); |
6989 | frag_now->tc_frag_data.is_insn = TRUE; | |
c138bc38 | 6990 | |
43cd72b9 BW |
6991 | max_fill = get_text_align_max_fill_size |
6992 | (get_text_align_power (xtensa_fetch_width), | |
6993 | TRUE, frag_now->tc_frag_data.is_no_density); | |
6994 | ||
6995 | if (use_transform ()) | |
6996 | frag_var (rs_machine_dependent, max_fill, max_fill, | |
05d58145 | 6997 | RELAX_ALIGN_NEXT_OPCODE, target_sym, 0, NULL); |
43cd72b9 | 6998 | else |
c138bc38 | 6999 | frag_var (rs_machine_dependent, 0, 0, |
05d58145 | 7000 | RELAX_CHECK_ALIGN_NEXT_OPCODE, target_sym, 0, NULL); |
43cd72b9 | 7001 | xtensa_set_frag_assembly_state (frag_now); |
43cd72b9 BW |
7002 | } |
7003 | ||
b08b5071 | 7004 | if (vinsn->slots[0].opcode == xtensa_entry_opcode |
43cd72b9 BW |
7005 | && !vinsn->slots[0].is_specific_opcode) |
7006 | { | |
7007 | xtensa_mark_literal_pool_location (); | |
c3ea6048 | 7008 | xtensa_move_labels (frag_now, 0); |
43cd72b9 BW |
7009 | frag_var (rs_align_test, 1, 1, 0, NULL, 2, NULL); |
7010 | } | |
7011 | ||
7012 | if (vinsn->num_slots == 1) | |
7013 | { | |
7014 | if (workaround_a0_b_retw && use_transform ()) | |
7015 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_A0_WRITER, | |
7016 | is_register_writer (&vinsn->slots[0], "a", 0)); | |
7017 | ||
7018 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_BAD_LOOPEND, | |
7019 | is_bad_loopend_opcode (&vinsn->slots[0])); | |
7020 | } | |
7021 | else | |
7022 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_BAD_LOOPEND, FALSE); | |
7023 | ||
7024 | insn_size = xtensa_format_length (isa, vinsn->format); | |
7025 | ||
e7da6241 | 7026 | extra_space = relaxation_requirements (vinsn, &finish_frag); |
43cd72b9 BW |
7027 | |
7028 | /* vinsn_to_insnbuf will produce the error. */ | |
7029 | if (vinsn->format != XTENSA_UNDEFINED) | |
7030 | { | |
d77b99c9 | 7031 | f = frag_more (insn_size + extra_space); |
43cd72b9 BW |
7032 | xtensa_set_frag_assembly_state (frag_now); |
7033 | frag_now->tc_frag_data.is_insn = TRUE; | |
7034 | } | |
7035 | ||
e7da6241 | 7036 | vinsn_to_insnbuf (vinsn, f, frag_now, FALSE); |
43cd72b9 BW |
7037 | if (vinsn->format == XTENSA_UNDEFINED) |
7038 | return; | |
7039 | ||
d77b99c9 | 7040 | xtensa_insnbuf_to_chars (isa, vinsn->insnbuf, (unsigned char *) f, 0); |
c138bc38 | 7041 | |
b224e962 BW |
7042 | if (debug_type == DEBUG_DWARF2 || loc_directive_seen) |
7043 | dwarf2_gen_line_info (frag_now_fix () - (insn_size + extra_space), | |
7044 | &debug_line); | |
43cd72b9 BW |
7045 | |
7046 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
7047 | { | |
b224e962 | 7048 | tinsn = &vinsn->slots[slot]; |
43cd72b9 | 7049 | frag_now->tc_frag_data.slot_subtypes[slot] = tinsn->subtype; |
7c834684 | 7050 | frag_now->tc_frag_data.slot_symbols[slot] = tinsn->symbol; |
7c834684 | 7051 | frag_now->tc_frag_data.slot_offsets[slot] = tinsn->offset; |
43cd72b9 BW |
7052 | frag_now->tc_frag_data.literal_frags[slot] = tinsn->literal_frag; |
7053 | if (tinsn->literal_space != 0) | |
7054 | xg_assemble_literal_space (tinsn->literal_space, slot); | |
19e8f41a | 7055 | frag_now->tc_frag_data.free_reg[slot] = tinsn->extra_arg; |
43cd72b9 BW |
7056 | |
7057 | if (tinsn->subtype == RELAX_NARROW) | |
9c2799c2 | 7058 | gas_assert (vinsn->num_slots == 1); |
43cd72b9 BW |
7059 | if (xtensa_opcode_is_jump (isa, tinsn->opcode) == 1) |
7060 | is_jump = TRUE; | |
7061 | if (xtensa_opcode_is_branch (isa, tinsn->opcode) == 1) | |
7062 | is_branch = TRUE; | |
7063 | ||
e7da6241 BW |
7064 | if (tinsn->subtype || tinsn->symbol || tinsn->offset |
7065 | || tinsn->literal_frag || is_jump || is_branch) | |
43cd72b9 BW |
7066 | finish_frag = TRUE; |
7067 | } | |
7068 | ||
7069 | if (vinsn_has_specific_opcodes (vinsn) && use_transform ()) | |
b08b5071 | 7070 | frag_now->tc_frag_data.is_specific_opcode = TRUE; |
43cd72b9 BW |
7071 | |
7072 | if (finish_frag) | |
7073 | { | |
7074 | frag_variant (rs_machine_dependent, | |
7075 | extra_space, extra_space, RELAX_SLOTS, | |
7076 | frag_now->fr_symbol, frag_now->fr_offset, f); | |
7077 | xtensa_set_frag_assembly_state (frag_now); | |
7078 | } | |
7079 | ||
7080 | /* Special cases for loops: | |
7081 | close_loop_end should be inserted AFTER short_loop. | |
7082 | Make sure that CLOSE loops are processed BEFORE short_loops | |
7083 | when converting them. */ | |
7084 | ||
7085 | /* "short_loop": Add a NOP if the loop is < 4 bytes. */ | |
64b607e6 | 7086 | if (xtensa_opcode_is_loop (isa, vinsn->slots[0].opcode) == 1 |
43cd72b9 BW |
7087 | && !vinsn->slots[0].is_specific_opcode) |
7088 | { | |
7089 | if (workaround_short_loop && use_transform ()) | |
7090 | { | |
7091 | maybe_has_short_loop = TRUE; | |
7092 | frag_now->tc_frag_data.is_insn = TRUE; | |
7093 | frag_var (rs_machine_dependent, 4, 4, | |
7094 | RELAX_ADD_NOP_IF_SHORT_LOOP, | |
7095 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7096 | frag_now->tc_frag_data.is_insn = TRUE; | |
7097 | frag_var (rs_machine_dependent, 4, 4, | |
7098 | RELAX_ADD_NOP_IF_SHORT_LOOP, | |
7099 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7100 | } | |
7101 | ||
7102 | /* "close_loop_end": Add up to 12 bytes of NOPs to keep a | |
7103 | loop at least 12 bytes away from another loop's end. */ | |
7104 | if (workaround_close_loop_end && use_transform ()) | |
7105 | { | |
7106 | maybe_has_close_loop_end = TRUE; | |
7107 | frag_now->tc_frag_data.is_insn = TRUE; | |
7108 | frag_var (rs_machine_dependent, 12, 12, | |
7109 | RELAX_ADD_NOP_IF_CLOSE_LOOP_END, | |
7110 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7111 | } | |
7112 | } | |
7113 | ||
7114 | if (use_transform ()) | |
7115 | { | |
7116 | if (is_jump) | |
7117 | { | |
9c2799c2 | 7118 | gas_assert (finish_frag); |
43cd72b9 BW |
7119 | frag_var (rs_machine_dependent, |
7120 | UNREACHABLE_MAX_WIDTH, UNREACHABLE_MAX_WIDTH, | |
7121 | RELAX_UNREACHABLE, | |
7122 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7123 | xtensa_set_frag_assembly_state (frag_now); | |
7124 | } | |
7b1cc377 | 7125 | else if (is_branch && do_align_targets ()) |
43cd72b9 | 7126 | { |
9c2799c2 | 7127 | gas_assert (finish_frag); |
43cd72b9 BW |
7128 | frag_var (rs_machine_dependent, |
7129 | UNREACHABLE_MAX_WIDTH, UNREACHABLE_MAX_WIDTH, | |
7130 | RELAX_MAYBE_UNREACHABLE, | |
7131 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7132 | xtensa_set_frag_assembly_state (frag_now); | |
7133 | frag_var (rs_machine_dependent, | |
7134 | 0, 0, | |
7135 | RELAX_MAYBE_DESIRE_ALIGN, | |
7136 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7137 | xtensa_set_frag_assembly_state (frag_now); | |
7138 | } | |
7139 | } | |
7140 | ||
7141 | /* Now, if the original opcode was a call... */ | |
7142 | if (do_align_targets () | |
7143 | && xtensa_opcode_is_call (isa, vinsn->slots[0].opcode) == 1) | |
7144 | { | |
b08b5071 | 7145 | float freq = get_subseg_total_freq (now_seg, now_subseg); |
43cd72b9 BW |
7146 | frag_now->tc_frag_data.is_insn = TRUE; |
7147 | frag_var (rs_machine_dependent, 4, (int) freq, RELAX_DESIRE_ALIGN, | |
7148 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7149 | xtensa_set_frag_assembly_state (frag_now); | |
7150 | } | |
7151 | ||
7152 | if (vinsn_has_specific_opcodes (vinsn) && use_transform ()) | |
7153 | { | |
7154 | frag_wane (frag_now); | |
7155 | frag_new (0); | |
7156 | xtensa_set_frag_assembly_state (frag_now); | |
7157 | } | |
7158 | } | |
7159 | ||
7160 | \f | |
7fa3d080 BW |
7161 | /* xtensa_end and helper functions. */ |
7162 | ||
7163 | static void xtensa_cleanup_align_frags (void); | |
7164 | static void xtensa_fix_target_frags (void); | |
7165 | static void xtensa_mark_narrow_branches (void); | |
7166 | static void xtensa_mark_zcl_first_insns (void); | |
6a7eedfe | 7167 | static void xtensa_mark_difference_of_two_symbols (void); |
7fa3d080 BW |
7168 | static void xtensa_fix_a0_b_retw_frags (void); |
7169 | static void xtensa_fix_b_j_loop_end_frags (void); | |
7170 | static void xtensa_fix_close_loop_end_frags (void); | |
7171 | static void xtensa_fix_short_loop_frags (void); | |
7172 | static void xtensa_sanity_check (void); | |
2caa7ca0 | 7173 | static void xtensa_add_config_info (void); |
7fa3d080 | 7174 | |
43cd72b9 | 7175 | void |
7fa3d080 | 7176 | xtensa_end (void) |
43cd72b9 BW |
7177 | { |
7178 | directive_balance (); | |
7179 | xtensa_flush_pending_output (); | |
7180 | ||
7181 | past_xtensa_end = TRUE; | |
7182 | ||
7183 | xtensa_move_literals (); | |
7184 | ||
7185 | xtensa_reorder_segments (); | |
7186 | xtensa_cleanup_align_frags (); | |
7187 | xtensa_fix_target_frags (); | |
7188 | if (workaround_a0_b_retw && has_a0_b_retw) | |
7189 | xtensa_fix_a0_b_retw_frags (); | |
7190 | if (workaround_b_j_loop_end) | |
7191 | xtensa_fix_b_j_loop_end_frags (); | |
7192 | ||
7193 | /* "close_loop_end" should be processed BEFORE "short_loop". */ | |
7194 | if (workaround_close_loop_end && maybe_has_close_loop_end) | |
7195 | xtensa_fix_close_loop_end_frags (); | |
7196 | ||
7197 | if (workaround_short_loop && maybe_has_short_loop) | |
7198 | xtensa_fix_short_loop_frags (); | |
03aaa593 BW |
7199 | if (align_targets) |
7200 | xtensa_mark_narrow_branches (); | |
43cd72b9 BW |
7201 | xtensa_mark_zcl_first_insns (); |
7202 | ||
7203 | xtensa_sanity_check (); | |
2caa7ca0 BW |
7204 | |
7205 | xtensa_add_config_info (); | |
43cd72b9 BW |
7206 | } |
7207 | ||
7208 | ||
7209 | static void | |
7fa3d080 | 7210 | xtensa_cleanup_align_frags (void) |
43cd72b9 BW |
7211 | { |
7212 | frchainS *frchP; | |
c9049d30 | 7213 | asection *s; |
43cd72b9 | 7214 | |
c9049d30 AM |
7215 | for (s = stdoutput->sections; s; s = s->next) |
7216 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7217 | { | |
7218 | fragS *fragP; | |
7219 | /* Walk over all of the fragments in a subsection. */ | |
7220 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7221 | { | |
7222 | if ((fragP->fr_type == rs_align | |
7223 | || fragP->fr_type == rs_align_code | |
7224 | || (fragP->fr_type == rs_machine_dependent | |
7225 | && (fragP->fr_subtype == RELAX_DESIRE_ALIGN | |
7226 | || fragP->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET))) | |
7227 | && fragP->fr_fix == 0) | |
7228 | { | |
7229 | fragS *next = fragP->fr_next; | |
7230 | ||
7231 | while (next | |
7232 | && next->fr_fix == 0 | |
7233 | && next->fr_type == rs_machine_dependent | |
7234 | && next->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET) | |
7235 | { | |
7236 | frag_wane (next); | |
7237 | next = next->fr_next; | |
7238 | } | |
7239 | } | |
7240 | /* If we don't widen branch targets, then they | |
7241 | will be easier to align. */ | |
7242 | if (fragP->tc_frag_data.is_branch_target | |
7243 | && fragP->fr_opcode == fragP->fr_literal | |
7244 | && fragP->fr_type == rs_machine_dependent | |
7245 | && fragP->fr_subtype == RELAX_SLOTS | |
7246 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
7247 | frag_wane (fragP); | |
7248 | if (fragP->fr_type == rs_machine_dependent | |
7249 | && fragP->fr_subtype == RELAX_UNREACHABLE) | |
7250 | fragP->tc_frag_data.is_unreachable = TRUE; | |
7251 | } | |
7252 | } | |
43cd72b9 BW |
7253 | } |
7254 | ||
7255 | ||
7256 | /* Re-process all of the fragments looking to convert all of the | |
7257 | RELAX_DESIRE_ALIGN_IF_TARGET fragments. If there is a branch | |
7258 | target in the next fragment, convert this to RELAX_DESIRE_ALIGN. | |
7b1cc377 | 7259 | Otherwise, convert to a .fill 0. */ |
7fa3d080 | 7260 | |
43cd72b9 | 7261 | static void |
7fa3d080 | 7262 | xtensa_fix_target_frags (void) |
e0001a05 NC |
7263 | { |
7264 | frchainS *frchP; | |
c9049d30 | 7265 | asection *s; |
e0001a05 NC |
7266 | |
7267 | /* When this routine is called, all of the subsections are still intact | |
7268 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7269 | for (s = stdoutput->sections; s; s = s->next) |
7270 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7271 | { | |
7272 | fragS *fragP; | |
e0001a05 | 7273 | |
c9049d30 AM |
7274 | /* Walk over all of the fragments in a subsection. */ |
7275 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7276 | { | |
7277 | if (fragP->fr_type == rs_machine_dependent | |
7278 | && fragP->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET) | |
7279 | { | |
7280 | if (next_frag_is_branch_target (fragP)) | |
7281 | fragP->fr_subtype = RELAX_DESIRE_ALIGN; | |
7282 | else | |
7283 | frag_wane (fragP); | |
7284 | } | |
7285 | } | |
7286 | } | |
e0001a05 NC |
7287 | } |
7288 | ||
7289 | ||
7fa3d080 BW |
7290 | static bfd_boolean is_narrow_branch_guaranteed_in_range (fragS *, TInsn *); |
7291 | ||
43cd72b9 | 7292 | static void |
7fa3d080 | 7293 | xtensa_mark_narrow_branches (void) |
43cd72b9 BW |
7294 | { |
7295 | frchainS *frchP; | |
c9049d30 | 7296 | asection *s; |
43cd72b9 | 7297 | |
c9049d30 AM |
7298 | for (s = stdoutput->sections; s; s = s->next) |
7299 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7300 | { | |
7301 | fragS *fragP; | |
7302 | /* Walk over all of the fragments in a subsection. */ | |
7303 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7304 | { | |
7305 | if (fragP->fr_type == rs_machine_dependent | |
7306 | && fragP->fr_subtype == RELAX_SLOTS | |
7307 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED) | |
7308 | { | |
7309 | vliw_insn vinsn; | |
7310 | ||
7311 | vinsn_from_chars (&vinsn, fragP->fr_opcode); | |
7312 | tinsn_immed_from_frag (&vinsn.slots[0], fragP, 0); | |
7313 | ||
7314 | if (vinsn.num_slots == 1 | |
7315 | && xtensa_opcode_is_branch (xtensa_default_isa, | |
64b607e6 | 7316 | vinsn.slots[0].opcode) == 1 |
c9049d30 AM |
7317 | && xg_get_single_size (vinsn.slots[0].opcode) == 2 |
7318 | && is_narrow_branch_guaranteed_in_range (fragP, | |
7319 | &vinsn.slots[0])) | |
7320 | { | |
7321 | fragP->fr_subtype = RELAX_SLOTS; | |
7322 | fragP->tc_frag_data.slot_subtypes[0] = RELAX_NARROW; | |
7323 | fragP->tc_frag_data.is_aligning_branch = 1; | |
7324 | } | |
7325 | } | |
7326 | } | |
7327 | } | |
43cd72b9 BW |
7328 | } |
7329 | ||
7330 | ||
7331 | /* A branch is typically widened only when its target is out of | |
7332 | range. However, we would like to widen them to align a subsequent | |
7333 | branch target when possible. | |
7334 | ||
7335 | Because the branch relaxation code is so convoluted, the optimal solution | |
7336 | (combining the two cases) is difficult to get right in all circumstances. | |
7337 | We therefore go with an "almost as good" solution, where we only | |
7338 | use for alignment narrow branches that definitely will not expand to a | |
7339 | jump and a branch. These functions find and mark these cases. */ | |
7340 | ||
a67517f4 BW |
7341 | /* The range in bytes of BNEZ.N and BEQZ.N. The target operand is encoded |
7342 | as PC + 4 + imm6, where imm6 is a 6-bit immediate ranging from 0 to 63. | |
7343 | We start counting beginning with the frag after the 2-byte branch, so the | |
7344 | maximum offset is (4 - 2) + 63 = 65. */ | |
7345 | #define MAX_IMMED6 65 | |
43cd72b9 | 7346 | |
d77b99c9 | 7347 | static offsetT unrelaxed_frag_max_size (fragS *); |
7fa3d080 | 7348 | |
43cd72b9 | 7349 | static bfd_boolean |
7fa3d080 | 7350 | is_narrow_branch_guaranteed_in_range (fragS *fragP, TInsn *tinsn) |
43cd72b9 BW |
7351 | { |
7352 | const expressionS *expr = &tinsn->tok[1]; | |
7353 | symbolS *symbolP = expr->X_add_symbol; | |
d77b99c9 | 7354 | offsetT max_distance = expr->X_add_number; |
e7da6241 BW |
7355 | fragS *target_frag; |
7356 | ||
7357 | if (expr->X_op != O_symbol) | |
7358 | return FALSE; | |
7359 | ||
7360 | target_frag = symbol_get_frag (symbolP); | |
7361 | ||
43cd72b9 BW |
7362 | max_distance += (S_GET_VALUE (symbolP) - target_frag->fr_address); |
7363 | if (is_branch_jmp_to_next (tinsn, fragP)) | |
7364 | return FALSE; | |
7365 | ||
7366 | /* The branch doesn't branch over it's own frag, | |
7367 | but over the subsequent ones. */ | |
7368 | fragP = fragP->fr_next; | |
7369 | while (fragP != NULL && fragP != target_frag && max_distance <= MAX_IMMED6) | |
7370 | { | |
7371 | max_distance += unrelaxed_frag_max_size (fragP); | |
7372 | fragP = fragP->fr_next; | |
7373 | } | |
7374 | if (max_distance <= MAX_IMMED6 && fragP == target_frag) | |
7375 | return TRUE; | |
e0001a05 NC |
7376 | return FALSE; |
7377 | } | |
7378 | ||
7379 | ||
43cd72b9 | 7380 | static void |
7fa3d080 | 7381 | xtensa_mark_zcl_first_insns (void) |
43cd72b9 BW |
7382 | { |
7383 | frchainS *frchP; | |
c9049d30 | 7384 | asection *s; |
43cd72b9 | 7385 | |
c9049d30 AM |
7386 | for (s = stdoutput->sections; s; s = s->next) |
7387 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7388 | { | |
7389 | fragS *fragP; | |
7390 | /* Walk over all of the fragments in a subsection. */ | |
7391 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7392 | { | |
7393 | if (fragP->fr_type == rs_machine_dependent | |
7394 | && (fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE | |
7395 | || fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE)) | |
7396 | { | |
7397 | /* Find the loop frag. */ | |
7398 | fragS *targ_frag = next_non_empty_frag (fragP); | |
7399 | /* Find the first insn frag. */ | |
7400 | targ_frag = next_non_empty_frag (targ_frag); | |
7401 | ||
7402 | /* Of course, sometimes (mostly for toy test cases) a | |
7403 | zero-cost loop instruction is the last in a section. */ | |
7404 | if (targ_frag) | |
7405 | { | |
7406 | targ_frag->tc_frag_data.is_first_loop_insn = TRUE; | |
7407 | /* Do not widen a frag that is the first instruction of a | |
7408 | zero-cost loop. It makes that loop harder to align. */ | |
7409 | if (targ_frag->fr_type == rs_machine_dependent | |
7410 | && targ_frag->fr_subtype == RELAX_SLOTS | |
7411 | && (targ_frag->tc_frag_data.slot_subtypes[0] | |
7412 | == RELAX_NARROW)) | |
7413 | { | |
7414 | if (targ_frag->tc_frag_data.is_aligning_branch) | |
7415 | targ_frag->tc_frag_data.slot_subtypes[0] = RELAX_IMMED; | |
7416 | else | |
7417 | { | |
7418 | frag_wane (targ_frag); | |
7419 | targ_frag->tc_frag_data.slot_subtypes[0] = 0; | |
7420 | } | |
7421 | } | |
7422 | } | |
7423 | if (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE) | |
7424 | frag_wane (fragP); | |
7425 | } | |
7426 | } | |
7427 | } | |
43cd72b9 BW |
7428 | } |
7429 | ||
7430 | ||
fb227da0 BW |
7431 | /* When a difference-of-symbols expression is encoded as a uleb128 or |
7432 | sleb128 value, the linker is unable to adjust that value to account for | |
7433 | link-time relaxation. Mark all the code between such symbols so that | |
7434 | its size cannot be changed by linker relaxation. */ | |
7435 | ||
6a7eedfe BW |
7436 | static void |
7437 | xtensa_mark_difference_of_two_symbols (void) | |
7438 | { | |
7439 | symbolS *expr_sym; | |
7440 | ||
7441 | for (expr_sym = expr_symbols; expr_sym; | |
7442 | expr_sym = symbol_get_tc (expr_sym)->next_expr_symbol) | |
7443 | { | |
7444 | expressionS *expr = symbol_get_value_expression (expr_sym); | |
7445 | ||
7446 | if (expr->X_op == O_subtract) | |
7447 | { | |
7448 | symbolS *left = expr->X_add_symbol; | |
7449 | symbolS *right = expr->X_op_symbol; | |
7450 | ||
7451 | /* Difference of two symbols not in the same section | |
7452 | are handled with relocations in the linker. */ | |
7453 | if (S_GET_SEGMENT (left) == S_GET_SEGMENT (right)) | |
7454 | { | |
7455 | fragS *start; | |
7456 | fragS *end; | |
983f90e3 | 7457 | fragS *walk; |
6a7eedfe BW |
7458 | |
7459 | if (symbol_get_frag (left)->fr_address | |
7460 | <= symbol_get_frag (right)->fr_address) | |
7461 | { | |
7462 | start = symbol_get_frag (left); | |
7463 | end = symbol_get_frag (right); | |
7464 | } | |
7465 | else | |
7466 | { | |
7467 | start = symbol_get_frag (right); | |
7468 | end = symbol_get_frag (left); | |
7469 | } | |
983f90e3 SA |
7470 | |
7471 | if (start->tc_frag_data.no_transform_end != NULL) | |
7472 | walk = start->tc_frag_data.no_transform_end; | |
7473 | else | |
7474 | walk = start; | |
6a7eedfe BW |
7475 | do |
7476 | { | |
983f90e3 SA |
7477 | walk->tc_frag_data.is_no_transform = 1; |
7478 | walk = walk->fr_next; | |
6a7eedfe | 7479 | } |
983f90e3 SA |
7480 | while (walk && walk->fr_address < end->fr_address); |
7481 | ||
7482 | start->tc_frag_data.no_transform_end = walk; | |
6a7eedfe BW |
7483 | } |
7484 | } | |
7485 | } | |
7486 | } | |
7487 | ||
7488 | ||
e0001a05 NC |
7489 | /* Re-process all of the fragments looking to convert all of the |
7490 | RELAX_ADD_NOP_IF_A0_B_RETW. If the next instruction is a | |
7491 | conditional branch or a retw/retw.n, convert this frag to one that | |
7492 | will generate a NOP. In any case close it off with a .fill 0. */ | |
7493 | ||
7fa3d080 BW |
7494 | static bfd_boolean next_instrs_are_b_retw (fragS *); |
7495 | ||
e0001a05 | 7496 | static void |
7fa3d080 | 7497 | xtensa_fix_a0_b_retw_frags (void) |
e0001a05 NC |
7498 | { |
7499 | frchainS *frchP; | |
c9049d30 | 7500 | asection *s; |
e0001a05 NC |
7501 | |
7502 | /* When this routine is called, all of the subsections are still intact | |
7503 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7504 | for (s = stdoutput->sections; s; s = s->next) |
7505 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7506 | { | |
7507 | fragS *fragP; | |
e0001a05 | 7508 | |
c9049d30 AM |
7509 | /* Walk over all of the fragments in a subsection. */ |
7510 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7511 | { | |
7512 | if (fragP->fr_type == rs_machine_dependent | |
7513 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_A0_B_RETW) | |
7514 | { | |
7515 | if (next_instrs_are_b_retw (fragP)) | |
7516 | { | |
7517 | if (fragP->tc_frag_data.is_no_transform) | |
7518 | as_bad (_("instruction sequence (write a0, branch, retw) may trigger hardware errata")); | |
7519 | else | |
7520 | relax_frag_add_nop (fragP); | |
7521 | } | |
7522 | frag_wane (fragP); | |
7523 | } | |
7524 | } | |
7525 | } | |
e0001a05 NC |
7526 | } |
7527 | ||
7528 | ||
7fa3d080 BW |
7529 | static bfd_boolean |
7530 | next_instrs_are_b_retw (fragS *fragP) | |
e0001a05 NC |
7531 | { |
7532 | xtensa_opcode opcode; | |
43cd72b9 | 7533 | xtensa_format fmt; |
e0001a05 NC |
7534 | const fragS *next_fragP = next_non_empty_frag (fragP); |
7535 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 7536 | static xtensa_insnbuf slotbuf = NULL; |
e0001a05 NC |
7537 | xtensa_isa isa = xtensa_default_isa; |
7538 | int offset = 0; | |
43cd72b9 BW |
7539 | int slot; |
7540 | bfd_boolean branch_seen = FALSE; | |
e0001a05 NC |
7541 | |
7542 | if (!insnbuf) | |
43cd72b9 BW |
7543 | { |
7544 | insnbuf = xtensa_insnbuf_alloc (isa); | |
7545 | slotbuf = xtensa_insnbuf_alloc (isa); | |
7546 | } | |
e0001a05 NC |
7547 | |
7548 | if (next_fragP == NULL) | |
7549 | return FALSE; | |
7550 | ||
7551 | /* Check for the conditional branch. */ | |
d77b99c9 BW |
7552 | xtensa_insnbuf_from_chars |
7553 | (isa, insnbuf, (unsigned char *) &next_fragP->fr_literal[offset], 0); | |
43cd72b9 BW |
7554 | fmt = xtensa_format_decode (isa, insnbuf); |
7555 | if (fmt == XTENSA_UNDEFINED) | |
7556 | return FALSE; | |
7557 | ||
7558 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
7559 | { | |
7560 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
7561 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
7562 | ||
7563 | branch_seen = (branch_seen | |
7564 | || xtensa_opcode_is_branch (isa, opcode) == 1); | |
7565 | } | |
e0001a05 | 7566 | |
43cd72b9 | 7567 | if (!branch_seen) |
e0001a05 NC |
7568 | return FALSE; |
7569 | ||
43cd72b9 | 7570 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
7571 | if (offset == next_fragP->fr_fix) |
7572 | { | |
7573 | next_fragP = next_non_empty_frag (next_fragP); | |
7574 | offset = 0; | |
7575 | } | |
43cd72b9 | 7576 | |
e0001a05 NC |
7577 | if (next_fragP == NULL) |
7578 | return FALSE; | |
7579 | ||
7580 | /* Check for the retw/retw.n. */ | |
d77b99c9 BW |
7581 | xtensa_insnbuf_from_chars |
7582 | (isa, insnbuf, (unsigned char *) &next_fragP->fr_literal[offset], 0); | |
43cd72b9 BW |
7583 | fmt = xtensa_format_decode (isa, insnbuf); |
7584 | ||
7585 | /* Because RETW[.N] is not bundleable, a VLIW bundle here means that we | |
7586 | have no problems. */ | |
7587 | if (fmt == XTENSA_UNDEFINED | |
7588 | || xtensa_format_num_slots (isa, fmt) != 1) | |
7589 | return FALSE; | |
7590 | ||
7591 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
7592 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
e0001a05 | 7593 | |
b08b5071 | 7594 | if (opcode == xtensa_retw_opcode || opcode == xtensa_retw_n_opcode) |
e0001a05 | 7595 | return TRUE; |
43cd72b9 | 7596 | |
e0001a05 NC |
7597 | return FALSE; |
7598 | } | |
7599 | ||
7600 | ||
7601 | /* Re-process all of the fragments looking to convert all of the | |
7602 | RELAX_ADD_NOP_IF_PRE_LOOP_END. If there is one instruction and a | |
7603 | loop end label, convert this frag to one that will generate a NOP. | |
7604 | In any case close it off with a .fill 0. */ | |
7605 | ||
7fa3d080 BW |
7606 | static bfd_boolean next_instr_is_loop_end (fragS *); |
7607 | ||
e0001a05 | 7608 | static void |
7fa3d080 | 7609 | xtensa_fix_b_j_loop_end_frags (void) |
e0001a05 NC |
7610 | { |
7611 | frchainS *frchP; | |
c9049d30 | 7612 | asection *s; |
e0001a05 NC |
7613 | |
7614 | /* When this routine is called, all of the subsections are still intact | |
7615 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7616 | for (s = stdoutput->sections; s; s = s->next) |
7617 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7618 | { | |
7619 | fragS *fragP; | |
e0001a05 | 7620 | |
c9049d30 AM |
7621 | /* Walk over all of the fragments in a subsection. */ |
7622 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7623 | { | |
7624 | if (fragP->fr_type == rs_machine_dependent | |
7625 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_PRE_LOOP_END) | |
7626 | { | |
7627 | if (next_instr_is_loop_end (fragP)) | |
7628 | { | |
7629 | if (fragP->tc_frag_data.is_no_transform) | |
7630 | as_bad (_("branching or jumping to a loop end may trigger hardware errata")); | |
7631 | else | |
7632 | relax_frag_add_nop (fragP); | |
7633 | } | |
7634 | frag_wane (fragP); | |
7635 | } | |
7636 | } | |
7637 | } | |
e0001a05 NC |
7638 | } |
7639 | ||
7640 | ||
7fa3d080 BW |
7641 | static bfd_boolean |
7642 | next_instr_is_loop_end (fragS *fragP) | |
e0001a05 NC |
7643 | { |
7644 | const fragS *next_fragP; | |
7645 | ||
7646 | if (next_frag_is_loop_target (fragP)) | |
7647 | return FALSE; | |
7648 | ||
7649 | next_fragP = next_non_empty_frag (fragP); | |
7650 | if (next_fragP == NULL) | |
7651 | return FALSE; | |
7652 | ||
7653 | if (!next_frag_is_loop_target (next_fragP)) | |
7654 | return FALSE; | |
7655 | ||
7656 | /* If the size is >= 3 then there is more than one instruction here. | |
7657 | The hardware bug will not fire. */ | |
7658 | if (next_fragP->fr_fix > 3) | |
7659 | return FALSE; | |
7660 | ||
7661 | return TRUE; | |
7662 | } | |
7663 | ||
7664 | ||
7665 | /* Re-process all of the fragments looking to convert all of the | |
7666 | RELAX_ADD_NOP_IF_CLOSE_LOOP_END. If there is an loop end that is | |
7667 | not MY loop's loop end within 12 bytes, add enough nops here to | |
7668 | make it at least 12 bytes away. In any case close it off with a | |
7669 | .fill 0. */ | |
7670 | ||
d77b99c9 | 7671 | static offsetT min_bytes_to_other_loop_end |
05d58145 | 7672 | (fragS *, fragS *, offsetT); |
7fa3d080 | 7673 | |
e0001a05 | 7674 | static void |
7fa3d080 | 7675 | xtensa_fix_close_loop_end_frags (void) |
e0001a05 NC |
7676 | { |
7677 | frchainS *frchP; | |
c9049d30 | 7678 | asection *s; |
e0001a05 NC |
7679 | |
7680 | /* When this routine is called, all of the subsections are still intact | |
7681 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7682 | for (s = stdoutput->sections; s; s = s->next) |
7683 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7684 | { | |
7685 | fragS *fragP; | |
e0001a05 | 7686 | |
c9049d30 | 7687 | fragS *current_target = NULL; |
e0001a05 | 7688 | |
c9049d30 AM |
7689 | /* Walk over all of the fragments in a subsection. */ |
7690 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7691 | { | |
7692 | if (fragP->fr_type == rs_machine_dependent | |
7693 | && ((fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE) | |
7694 | || (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE))) | |
05d58145 | 7695 | current_target = symbol_get_frag (fragP->fr_symbol); |
e0001a05 | 7696 | |
c9049d30 AM |
7697 | if (current_target |
7698 | && fragP->fr_type == rs_machine_dependent | |
7699 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_CLOSE_LOOP_END) | |
7700 | { | |
7701 | offsetT min_bytes; | |
7702 | int bytes_added = 0; | |
e0001a05 NC |
7703 | |
7704 | #define REQUIRED_LOOP_DIVIDING_BYTES 12 | |
c9049d30 AM |
7705 | /* Max out at 12. */ |
7706 | min_bytes = min_bytes_to_other_loop_end | |
7707 | (fragP->fr_next, current_target, REQUIRED_LOOP_DIVIDING_BYTES); | |
7708 | ||
7709 | if (min_bytes < REQUIRED_LOOP_DIVIDING_BYTES) | |
7710 | { | |
7711 | if (fragP->tc_frag_data.is_no_transform) | |
7712 | as_bad (_("loop end too close to another loop end may trigger hardware errata")); | |
7713 | else | |
7714 | { | |
7715 | while (min_bytes + bytes_added | |
7716 | < REQUIRED_LOOP_DIVIDING_BYTES) | |
7717 | { | |
7718 | int length = 3; | |
7719 | ||
7720 | if (fragP->fr_var < length) | |
7721 | as_fatal (_("fr_var %lu < length %d"), | |
7722 | (long) fragP->fr_var, length); | |
7723 | else | |
7724 | { | |
7725 | assemble_nop (length, | |
7726 | fragP->fr_literal + fragP->fr_fix); | |
7727 | fragP->fr_fix += length; | |
7728 | fragP->fr_var -= length; | |
7729 | } | |
7730 | bytes_added += length; | |
7731 | } | |
7732 | } | |
7733 | } | |
7734 | frag_wane (fragP); | |
7735 | } | |
9c2799c2 | 7736 | gas_assert (fragP->fr_type != rs_machine_dependent |
c9049d30 AM |
7737 | || fragP->fr_subtype != RELAX_ADD_NOP_IF_CLOSE_LOOP_END); |
7738 | } | |
7739 | } | |
e0001a05 NC |
7740 | } |
7741 | ||
7742 | ||
d77b99c9 | 7743 | static offsetT unrelaxed_frag_min_size (fragS *); |
7fa3d080 | 7744 | |
d77b99c9 | 7745 | static offsetT |
7fa3d080 BW |
7746 | min_bytes_to_other_loop_end (fragS *fragP, |
7747 | fragS *current_target, | |
d77b99c9 | 7748 | offsetT max_size) |
e0001a05 | 7749 | { |
d77b99c9 | 7750 | offsetT offset = 0; |
e0001a05 NC |
7751 | fragS *current_fragP; |
7752 | ||
7753 | for (current_fragP = fragP; | |
7754 | current_fragP; | |
7755 | current_fragP = current_fragP->fr_next) | |
7756 | { | |
7757 | if (current_fragP->tc_frag_data.is_loop_target | |
7758 | && current_fragP != current_target) | |
05d58145 | 7759 | return offset; |
e0001a05 NC |
7760 | |
7761 | offset += unrelaxed_frag_min_size (current_fragP); | |
7762 | ||
05d58145 | 7763 | if (offset >= max_size) |
e0001a05 NC |
7764 | return max_size; |
7765 | } | |
7766 | return max_size; | |
7767 | } | |
7768 | ||
7769 | ||
d77b99c9 | 7770 | static offsetT |
7fa3d080 | 7771 | unrelaxed_frag_min_size (fragS *fragP) |
e0001a05 | 7772 | { |
d77b99c9 | 7773 | offsetT size = fragP->fr_fix; |
e0001a05 | 7774 | |
d77b99c9 | 7775 | /* Add fill size. */ |
e0001a05 NC |
7776 | if (fragP->fr_type == rs_fill) |
7777 | size += fragP->fr_offset; | |
7778 | ||
7779 | return size; | |
7780 | } | |
7781 | ||
7782 | ||
d77b99c9 | 7783 | static offsetT |
7fa3d080 | 7784 | unrelaxed_frag_max_size (fragS *fragP) |
43cd72b9 | 7785 | { |
d77b99c9 | 7786 | offsetT size = fragP->fr_fix; |
43cd72b9 BW |
7787 | switch (fragP->fr_type) |
7788 | { | |
7789 | case 0: | |
c138bc38 | 7790 | /* Empty frags created by the obstack allocation scheme |
43cd72b9 BW |
7791 | end up with type 0. */ |
7792 | break; | |
7793 | case rs_fill: | |
7794 | case rs_org: | |
7795 | case rs_space: | |
7796 | size += fragP->fr_offset; | |
7797 | break; | |
7798 | case rs_align: | |
7799 | case rs_align_code: | |
7800 | case rs_align_test: | |
7801 | case rs_leb128: | |
7802 | case rs_cfa: | |
7803 | case rs_dwarf2dbg: | |
7804 | /* No further adjustments needed. */ | |
7805 | break; | |
7806 | case rs_machine_dependent: | |
7807 | if (fragP->fr_subtype != RELAX_DESIRE_ALIGN) | |
7808 | size += fragP->fr_var; | |
7809 | break; | |
7810 | default: | |
7811 | /* We had darn well better know how big it is. */ | |
9c2799c2 | 7812 | gas_assert (0); |
43cd72b9 BW |
7813 | break; |
7814 | } | |
7815 | ||
7816 | return size; | |
7817 | } | |
7818 | ||
7819 | ||
e0001a05 NC |
7820 | /* Re-process all of the fragments looking to convert all |
7821 | of the RELAX_ADD_NOP_IF_SHORT_LOOP. If: | |
7822 | ||
7823 | A) | |
7824 | 1) the instruction size count to the loop end label | |
7825 | is too short (<= 2 instructions), | |
7826 | 2) loop has a jump or branch in it | |
7827 | ||
7828 | or B) | |
43cd72b9 | 7829 | 1) workaround_all_short_loops is TRUE |
e0001a05 NC |
7830 | 2) The generating loop was a 'loopgtz' or 'loopnez' |
7831 | 3) the instruction size count to the loop end label is too short | |
7832 | (<= 2 instructions) | |
7833 | then convert this frag (and maybe the next one) to generate a NOP. | |
7834 | In any case close it off with a .fill 0. */ | |
7835 | ||
d77b99c9 | 7836 | static int count_insns_to_loop_end (fragS *, bfd_boolean, int); |
7fa3d080 BW |
7837 | static bfd_boolean branch_before_loop_end (fragS *); |
7838 | ||
e0001a05 | 7839 | static void |
7fa3d080 | 7840 | xtensa_fix_short_loop_frags (void) |
e0001a05 NC |
7841 | { |
7842 | frchainS *frchP; | |
c9049d30 | 7843 | asection *s; |
e0001a05 NC |
7844 | |
7845 | /* When this routine is called, all of the subsections are still intact | |
7846 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7847 | for (s = stdoutput->sections; s; s = s->next) |
7848 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7849 | { | |
7850 | fragS *fragP; | |
7851 | fragS *current_target = NULL; | |
7852 | xtensa_opcode current_opcode = XTENSA_UNDEFINED; | |
e0001a05 | 7853 | |
c9049d30 AM |
7854 | /* Walk over all of the fragments in a subsection. */ |
7855 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7856 | { | |
7857 | if (fragP->fr_type == rs_machine_dependent | |
7858 | && ((fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE) | |
7859 | || (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE))) | |
7860 | { | |
7861 | TInsn t_insn; | |
7862 | fragS *loop_frag = next_non_empty_frag (fragP); | |
7863 | tinsn_from_chars (&t_insn, loop_frag->fr_opcode, 0); | |
7864 | current_target = symbol_get_frag (fragP->fr_symbol); | |
7865 | current_opcode = t_insn.opcode; | |
9c2799c2 | 7866 | gas_assert (xtensa_opcode_is_loop (xtensa_default_isa, |
64b607e6 | 7867 | current_opcode) == 1); |
c9049d30 | 7868 | } |
e0001a05 | 7869 | |
c9049d30 AM |
7870 | if (fragP->fr_type == rs_machine_dependent |
7871 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_SHORT_LOOP) | |
7872 | { | |
7873 | if (count_insns_to_loop_end (fragP->fr_next, TRUE, 3) < 3 | |
7874 | && (branch_before_loop_end (fragP->fr_next) | |
7875 | || (workaround_all_short_loops | |
7876 | && current_opcode != XTENSA_UNDEFINED | |
7877 | && current_opcode != xtensa_loop_opcode))) | |
7878 | { | |
7879 | if (fragP->tc_frag_data.is_no_transform) | |
7880 | as_bad (_("loop containing less than three instructions may trigger hardware errata")); | |
7881 | else | |
7882 | relax_frag_add_nop (fragP); | |
7883 | } | |
7884 | frag_wane (fragP); | |
7885 | } | |
7886 | } | |
7887 | } | |
e0001a05 NC |
7888 | } |
7889 | ||
7890 | ||
d77b99c9 | 7891 | static int unrelaxed_frag_min_insn_count (fragS *); |
7fa3d080 | 7892 | |
d77b99c9 | 7893 | static int |
7fa3d080 BW |
7894 | count_insns_to_loop_end (fragS *base_fragP, |
7895 | bfd_boolean count_relax_add, | |
d77b99c9 | 7896 | int max_count) |
e0001a05 NC |
7897 | { |
7898 | fragS *fragP = NULL; | |
d77b99c9 | 7899 | int insn_count = 0; |
e0001a05 NC |
7900 | |
7901 | fragP = base_fragP; | |
7902 | ||
7903 | for (; fragP && !fragP->tc_frag_data.is_loop_target; fragP = fragP->fr_next) | |
7904 | { | |
7905 | insn_count += unrelaxed_frag_min_insn_count (fragP); | |
7906 | if (insn_count >= max_count) | |
7907 | return max_count; | |
7908 | ||
7909 | if (count_relax_add) | |
7910 | { | |
7911 | if (fragP->fr_type == rs_machine_dependent | |
7912 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_SHORT_LOOP) | |
7913 | { | |
7914 | /* In order to add the appropriate number of | |
7915 | NOPs, we count an instruction for downstream | |
7916 | occurrences. */ | |
7917 | insn_count++; | |
7918 | if (insn_count >= max_count) | |
7919 | return max_count; | |
7920 | } | |
7921 | } | |
7922 | } | |
7923 | return insn_count; | |
7924 | } | |
7925 | ||
7926 | ||
d77b99c9 | 7927 | static int |
7fa3d080 | 7928 | unrelaxed_frag_min_insn_count (fragS *fragP) |
e0001a05 | 7929 | { |
43cd72b9 BW |
7930 | xtensa_isa isa = xtensa_default_isa; |
7931 | static xtensa_insnbuf insnbuf = NULL; | |
d77b99c9 | 7932 | int insn_count = 0; |
e0001a05 NC |
7933 | int offset = 0; |
7934 | ||
7935 | if (!fragP->tc_frag_data.is_insn) | |
7936 | return insn_count; | |
7937 | ||
43cd72b9 BW |
7938 | if (!insnbuf) |
7939 | insnbuf = xtensa_insnbuf_alloc (isa); | |
7940 | ||
e0001a05 NC |
7941 | /* Decode the fixed instructions. */ |
7942 | while (offset < fragP->fr_fix) | |
7943 | { | |
43cd72b9 BW |
7944 | xtensa_format fmt; |
7945 | ||
d77b99c9 BW |
7946 | xtensa_insnbuf_from_chars |
7947 | (isa, insnbuf, (unsigned char *) fragP->fr_literal + offset, 0); | |
43cd72b9 BW |
7948 | fmt = xtensa_format_decode (isa, insnbuf); |
7949 | ||
7950 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 NC |
7951 | { |
7952 | as_fatal (_("undecodable instruction in instruction frag")); | |
7953 | return insn_count; | |
7954 | } | |
43cd72b9 | 7955 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
7956 | insn_count++; |
7957 | } | |
7958 | ||
7959 | return insn_count; | |
7960 | } | |
7961 | ||
7962 | ||
7fa3d080 BW |
7963 | static bfd_boolean unrelaxed_frag_has_b_j (fragS *); |
7964 | ||
43cd72b9 | 7965 | static bfd_boolean |
7fa3d080 | 7966 | branch_before_loop_end (fragS *base_fragP) |
e0001a05 NC |
7967 | { |
7968 | fragS *fragP; | |
7969 | ||
7970 | for (fragP = base_fragP; | |
7971 | fragP && !fragP->tc_frag_data.is_loop_target; | |
7972 | fragP = fragP->fr_next) | |
7973 | { | |
7974 | if (unrelaxed_frag_has_b_j (fragP)) | |
7975 | return TRUE; | |
7976 | } | |
7977 | return FALSE; | |
7978 | } | |
7979 | ||
7980 | ||
43cd72b9 | 7981 | static bfd_boolean |
7fa3d080 | 7982 | unrelaxed_frag_has_b_j (fragS *fragP) |
e0001a05 | 7983 | { |
43cd72b9 BW |
7984 | static xtensa_insnbuf insnbuf = NULL; |
7985 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 NC |
7986 | int offset = 0; |
7987 | ||
7988 | if (!fragP->tc_frag_data.is_insn) | |
7989 | return FALSE; | |
7990 | ||
43cd72b9 BW |
7991 | if (!insnbuf) |
7992 | insnbuf = xtensa_insnbuf_alloc (isa); | |
7993 | ||
e0001a05 NC |
7994 | /* Decode the fixed instructions. */ |
7995 | while (offset < fragP->fr_fix) | |
7996 | { | |
43cd72b9 BW |
7997 | xtensa_format fmt; |
7998 | int slot; | |
7999 | ||
d77b99c9 BW |
8000 | xtensa_insnbuf_from_chars |
8001 | (isa, insnbuf, (unsigned char *) fragP->fr_literal + offset, 0); | |
43cd72b9 BW |
8002 | fmt = xtensa_format_decode (isa, insnbuf); |
8003 | if (fmt == XTENSA_UNDEFINED) | |
8004 | return FALSE; | |
8005 | ||
8006 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
e0001a05 | 8007 | { |
43cd72b9 BW |
8008 | xtensa_opcode opcode = |
8009 | get_opcode_from_buf (fragP->fr_literal + offset, slot); | |
8010 | if (xtensa_opcode_is_branch (isa, opcode) == 1 | |
8011 | || xtensa_opcode_is_jump (isa, opcode) == 1) | |
8012 | return TRUE; | |
e0001a05 | 8013 | } |
43cd72b9 | 8014 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8015 | } |
8016 | return FALSE; | |
8017 | } | |
8018 | ||
8019 | ||
8020 | /* Checks to be made after initial assembly but before relaxation. */ | |
8021 | ||
7fa3d080 BW |
8022 | static bfd_boolean is_empty_loop (const TInsn *, fragS *); |
8023 | static bfd_boolean is_local_forward_loop (const TInsn *, fragS *); | |
8024 | ||
e0001a05 | 8025 | static void |
7fa3d080 | 8026 | xtensa_sanity_check (void) |
e0001a05 NC |
8027 | { |
8028 | char *file_name; | |
d77b99c9 | 8029 | unsigned line; |
e0001a05 | 8030 | frchainS *frchP; |
c9049d30 | 8031 | asection *s; |
e0001a05 NC |
8032 | |
8033 | as_where (&file_name, &line); | |
c9049d30 AM |
8034 | for (s = stdoutput->sections; s; s = s->next) |
8035 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8036 | { | |
8037 | fragS *fragP; | |
e0001a05 | 8038 | |
c9049d30 AM |
8039 | /* Walk over all of the fragments in a subsection. */ |
8040 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8041 | { | |
c9049d30 | 8042 | if (fragP->fr_type == rs_machine_dependent |
a7284bf1 BW |
8043 | && fragP->fr_subtype == RELAX_SLOTS |
8044 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED) | |
c9049d30 AM |
8045 | { |
8046 | static xtensa_insnbuf insnbuf = NULL; | |
8047 | TInsn t_insn; | |
8048 | ||
8049 | if (fragP->fr_opcode != NULL) | |
8050 | { | |
8051 | if (!insnbuf) | |
8052 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
8053 | tinsn_from_chars (&t_insn, fragP->fr_opcode, 0); | |
8054 | tinsn_immed_from_frag (&t_insn, fragP, 0); | |
8055 | ||
8056 | if (xtensa_opcode_is_loop (xtensa_default_isa, | |
8057 | t_insn.opcode) == 1) | |
8058 | { | |
8059 | if (is_empty_loop (&t_insn, fragP)) | |
8060 | { | |
8061 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8062 | as_bad (_("invalid empty loop")); | |
8063 | } | |
8064 | if (!is_local_forward_loop (&t_insn, fragP)) | |
8065 | { | |
8066 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8067 | as_bad (_("loop target does not follow " | |
8068 | "loop instruction in section")); | |
8069 | } | |
8070 | } | |
8071 | } | |
8072 | } | |
8073 | } | |
8074 | } | |
e0001a05 NC |
8075 | new_logical_line (file_name, line); |
8076 | } | |
8077 | ||
8078 | ||
8079 | #define LOOP_IMMED_OPN 1 | |
8080 | ||
43cd72b9 | 8081 | /* Return TRUE if the loop target is the next non-zero fragment. */ |
e0001a05 | 8082 | |
7fa3d080 BW |
8083 | static bfd_boolean |
8084 | is_empty_loop (const TInsn *insn, fragS *fragP) | |
e0001a05 NC |
8085 | { |
8086 | const expressionS *expr; | |
8087 | symbolS *symbolP; | |
8088 | fragS *next_fragP; | |
8089 | ||
8090 | if (insn->insn_type != ITYPE_INSN) | |
8091 | return FALSE; | |
8092 | ||
43cd72b9 | 8093 | if (xtensa_opcode_is_loop (xtensa_default_isa, insn->opcode) != 1) |
e0001a05 NC |
8094 | return FALSE; |
8095 | ||
8096 | if (insn->ntok <= LOOP_IMMED_OPN) | |
8097 | return FALSE; | |
8098 | ||
8099 | expr = &insn->tok[LOOP_IMMED_OPN]; | |
8100 | ||
8101 | if (expr->X_op != O_symbol) | |
8102 | return FALSE; | |
8103 | ||
8104 | symbolP = expr->X_add_symbol; | |
8105 | if (!symbolP) | |
8106 | return FALSE; | |
8107 | ||
8108 | if (symbol_get_frag (symbolP) == NULL) | |
8109 | return FALSE; | |
8110 | ||
8111 | if (S_GET_VALUE (symbolP) != 0) | |
8112 | return FALSE; | |
8113 | ||
8114 | /* Walk through the zero-size fragments from this one. If we find | |
8115 | the target fragment, then this is a zero-size loop. */ | |
43cd72b9 | 8116 | |
e0001a05 NC |
8117 | for (next_fragP = fragP->fr_next; |
8118 | next_fragP != NULL; | |
8119 | next_fragP = next_fragP->fr_next) | |
8120 | { | |
8121 | if (next_fragP == symbol_get_frag (symbolP)) | |
8122 | return TRUE; | |
8123 | if (next_fragP->fr_fix != 0) | |
8124 | return FALSE; | |
8125 | } | |
8126 | return FALSE; | |
8127 | } | |
8128 | ||
8129 | ||
7fa3d080 BW |
8130 | static bfd_boolean |
8131 | is_local_forward_loop (const TInsn *insn, fragS *fragP) | |
e0001a05 NC |
8132 | { |
8133 | const expressionS *expr; | |
8134 | symbolS *symbolP; | |
8135 | fragS *next_fragP; | |
8136 | ||
8137 | if (insn->insn_type != ITYPE_INSN) | |
8138 | return FALSE; | |
8139 | ||
64b607e6 | 8140 | if (xtensa_opcode_is_loop (xtensa_default_isa, insn->opcode) != 1) |
e0001a05 NC |
8141 | return FALSE; |
8142 | ||
8143 | if (insn->ntok <= LOOP_IMMED_OPN) | |
8144 | return FALSE; | |
8145 | ||
8146 | expr = &insn->tok[LOOP_IMMED_OPN]; | |
8147 | ||
8148 | if (expr->X_op != O_symbol) | |
8149 | return FALSE; | |
8150 | ||
8151 | symbolP = expr->X_add_symbol; | |
8152 | if (!symbolP) | |
8153 | return FALSE; | |
8154 | ||
8155 | if (symbol_get_frag (symbolP) == NULL) | |
8156 | return FALSE; | |
8157 | ||
8158 | /* Walk through fragments until we find the target. | |
8159 | If we do not find the target, then this is an invalid loop. */ | |
43cd72b9 | 8160 | |
e0001a05 NC |
8161 | for (next_fragP = fragP->fr_next; |
8162 | next_fragP != NULL; | |
8163 | next_fragP = next_fragP->fr_next) | |
43cd72b9 BW |
8164 | { |
8165 | if (next_fragP == symbol_get_frag (symbolP)) | |
8166 | return TRUE; | |
8167 | } | |
e0001a05 NC |
8168 | |
8169 | return FALSE; | |
8170 | } | |
8171 | ||
2caa7ca0 BW |
8172 | |
8173 | #define XTINFO_NAME "Xtensa_Info" | |
8174 | #define XTINFO_NAMESZ 12 | |
8175 | #define XTINFO_TYPE 1 | |
8176 | ||
8177 | static void | |
8178 | xtensa_add_config_info (void) | |
8179 | { | |
8180 | asection *info_sec; | |
8181 | char *data, *p; | |
8182 | int sz; | |
8183 | ||
8184 | info_sec = subseg_new (".xtensa.info", 0); | |
8185 | bfd_set_section_flags (stdoutput, info_sec, SEC_HAS_CONTENTS | SEC_READONLY); | |
8186 | ||
8187 | data = xmalloc (100); | |
8188 | sprintf (data, "USE_ABSOLUTE_LITERALS=%d\nABI=%d\n", | |
8189 | XSHAL_USE_ABSOLUTE_LITERALS, XSHAL_ABI); | |
8190 | sz = strlen (data) + 1; | |
8191 | ||
8192 | /* Add enough null terminators to pad to a word boundary. */ | |
8193 | do | |
8194 | data[sz++] = 0; | |
8195 | while ((sz & 3) != 0); | |
8196 | ||
8197 | /* Follow the standard note section layout: | |
8198 | First write the length of the name string. */ | |
8199 | p = frag_more (4); | |
8200 | md_number_to_chars (p, (valueT) XTINFO_NAMESZ, 4); | |
8201 | ||
8202 | /* Next comes the length of the "descriptor", i.e., the actual data. */ | |
8203 | p = frag_more (4); | |
8204 | md_number_to_chars (p, (valueT) sz, 4); | |
8205 | ||
8206 | /* Write the note type. */ | |
8207 | p = frag_more (4); | |
8208 | md_number_to_chars (p, (valueT) XTINFO_TYPE, 4); | |
8209 | ||
8210 | /* Write the name field. */ | |
8211 | p = frag_more (XTINFO_NAMESZ); | |
8212 | memcpy (p, XTINFO_NAME, XTINFO_NAMESZ); | |
8213 | ||
8214 | /* Finally, write the descriptor. */ | |
8215 | p = frag_more (sz); | |
8216 | memcpy (p, data, sz); | |
8217 | ||
8218 | free (data); | |
8219 | } | |
8220 | ||
e0001a05 NC |
8221 | \f |
8222 | /* Alignment Functions. */ | |
8223 | ||
d77b99c9 BW |
8224 | static int |
8225 | get_text_align_power (unsigned target_size) | |
e0001a05 | 8226 | { |
03aaa593 BW |
8227 | if (target_size <= 4) |
8228 | return 2; | |
9c2799c2 | 8229 | gas_assert (target_size == 8); |
03aaa593 | 8230 | return 3; |
e0001a05 NC |
8231 | } |
8232 | ||
8233 | ||
d77b99c9 | 8234 | static int |
7fa3d080 BW |
8235 | get_text_align_max_fill_size (int align_pow, |
8236 | bfd_boolean use_nops, | |
8237 | bfd_boolean use_no_density) | |
e0001a05 NC |
8238 | { |
8239 | if (!use_nops) | |
8240 | return (1 << align_pow); | |
8241 | if (use_no_density) | |
8242 | return 3 * (1 << align_pow); | |
8243 | ||
8244 | return 1 + (1 << align_pow); | |
8245 | } | |
8246 | ||
8247 | ||
d77b99c9 BW |
8248 | /* Calculate the minimum bytes of fill needed at "address" to align a |
8249 | target instruction of size "target_size" so that it does not cross a | |
8250 | power-of-two boundary specified by "align_pow". If "use_nops" is FALSE, | |
8251 | the fill can be an arbitrary number of bytes. Otherwise, the space must | |
8252 | be filled by NOP instructions. */ | |
e0001a05 | 8253 | |
d77b99c9 | 8254 | static int |
7fa3d080 BW |
8255 | get_text_align_fill_size (addressT address, |
8256 | int align_pow, | |
8257 | int target_size, | |
8258 | bfd_boolean use_nops, | |
8259 | bfd_boolean use_no_density) | |
e0001a05 | 8260 | { |
d77b99c9 BW |
8261 | addressT alignment, fill, fill_limit, fill_step; |
8262 | bfd_boolean skip_one = FALSE; | |
e0001a05 | 8263 | |
d77b99c9 | 8264 | alignment = (1 << align_pow); |
9c2799c2 | 8265 | gas_assert (target_size > 0 && alignment >= (addressT) target_size); |
c138bc38 | 8266 | |
e0001a05 NC |
8267 | if (!use_nops) |
8268 | { | |
d77b99c9 BW |
8269 | fill_limit = alignment; |
8270 | fill_step = 1; | |
e0001a05 | 8271 | } |
d77b99c9 | 8272 | else if (!use_no_density) |
e0001a05 | 8273 | { |
d77b99c9 BW |
8274 | /* Combine 2- and 3-byte NOPs to fill anything larger than one. */ |
8275 | fill_limit = alignment * 2; | |
8276 | fill_step = 1; | |
8277 | skip_one = TRUE; | |
e0001a05 NC |
8278 | } |
8279 | else | |
8280 | { | |
d77b99c9 BW |
8281 | /* Fill with 3-byte NOPs -- can only fill multiples of 3. */ |
8282 | fill_limit = alignment * 3; | |
8283 | fill_step = 3; | |
8284 | } | |
e0001a05 | 8285 | |
d77b99c9 BW |
8286 | /* Try all fill sizes until finding one that works. */ |
8287 | for (fill = 0; fill < fill_limit; fill += fill_step) | |
8288 | { | |
8289 | if (skip_one && fill == 1) | |
8290 | continue; | |
8291 | if ((address + fill) >> align_pow | |
8292 | == (address + fill + target_size - 1) >> align_pow) | |
8293 | return fill; | |
e0001a05 | 8294 | } |
9c2799c2 | 8295 | gas_assert (0); |
e0001a05 NC |
8296 | return 0; |
8297 | } | |
8298 | ||
8299 | ||
664df4e4 BW |
8300 | static int |
8301 | branch_align_power (segT sec) | |
8302 | { | |
8303 | /* If the Xtensa processor has a fetch width of 8 bytes, and the section | |
8304 | is aligned to at least an 8-byte boundary, then a branch target need | |
8305 | only fit within an 8-byte aligned block of memory to avoid a stall. | |
8306 | Otherwise, try to fit branch targets within 4-byte aligned blocks | |
8307 | (which may be insufficient, e.g., if the section has no alignment, but | |
8308 | it's good enough). */ | |
8309 | if (xtensa_fetch_width == 8) | |
8310 | { | |
8311 | if (get_recorded_alignment (sec) >= 3) | |
8312 | return 3; | |
8313 | } | |
8314 | else | |
9c2799c2 | 8315 | gas_assert (xtensa_fetch_width == 4); |
664df4e4 BW |
8316 | |
8317 | return 2; | |
8318 | } | |
8319 | ||
8320 | ||
e0001a05 NC |
8321 | /* This will assert if it is not possible. */ |
8322 | ||
d77b99c9 BW |
8323 | static int |
8324 | get_text_align_nop_count (offsetT fill_size, bfd_boolean use_no_density) | |
e0001a05 | 8325 | { |
d77b99c9 BW |
8326 | int count = 0; |
8327 | ||
e0001a05 NC |
8328 | if (use_no_density) |
8329 | { | |
9c2799c2 | 8330 | gas_assert (fill_size % 3 == 0); |
e0001a05 NC |
8331 | return (fill_size / 3); |
8332 | } | |
8333 | ||
9c2799c2 | 8334 | gas_assert (fill_size != 1); /* Bad argument. */ |
e0001a05 NC |
8335 | |
8336 | while (fill_size > 1) | |
8337 | { | |
d77b99c9 | 8338 | int insn_size = 3; |
e0001a05 NC |
8339 | if (fill_size == 2 || fill_size == 4) |
8340 | insn_size = 2; | |
8341 | fill_size -= insn_size; | |
8342 | count++; | |
8343 | } | |
9c2799c2 | 8344 | gas_assert (fill_size != 1); /* Bad algorithm. */ |
e0001a05 NC |
8345 | return count; |
8346 | } | |
8347 | ||
8348 | ||
d77b99c9 BW |
8349 | static int |
8350 | get_text_align_nth_nop_size (offsetT fill_size, | |
8351 | int n, | |
7fa3d080 | 8352 | bfd_boolean use_no_density) |
e0001a05 | 8353 | { |
d77b99c9 | 8354 | int count = 0; |
e0001a05 NC |
8355 | |
8356 | if (use_no_density) | |
8357 | return 3; | |
8358 | ||
9c2799c2 | 8359 | gas_assert (fill_size != 1); /* Bad argument. */ |
d77b99c9 | 8360 | |
e0001a05 NC |
8361 | while (fill_size > 1) |
8362 | { | |
d77b99c9 | 8363 | int insn_size = 3; |
e0001a05 NC |
8364 | if (fill_size == 2 || fill_size == 4) |
8365 | insn_size = 2; | |
8366 | fill_size -= insn_size; | |
8367 | count++; | |
8368 | if (n + 1 == count) | |
8369 | return insn_size; | |
8370 | } | |
9c2799c2 | 8371 | gas_assert (0); |
e0001a05 NC |
8372 | return 0; |
8373 | } | |
8374 | ||
8375 | ||
8376 | /* For the given fragment, find the appropriate address | |
8377 | for it to begin at if we are using NOPs to align it. */ | |
8378 | ||
8379 | static addressT | |
7fa3d080 | 8380 | get_noop_aligned_address (fragS *fragP, addressT address) |
e0001a05 | 8381 | { |
43cd72b9 BW |
8382 | /* The rule is: get next fragment's FIRST instruction. Find |
8383 | the smallest number of bytes that need to be added to | |
8384 | ensure that the next fragment's FIRST instruction will fit | |
8385 | in a single word. | |
c138bc38 | 8386 | |
43cd72b9 BW |
8387 | E.G., 2 bytes : 0, 1, 2 mod 4 |
8388 | 3 bytes: 0, 1 mod 4 | |
c138bc38 | 8389 | |
43cd72b9 BW |
8390 | If the FIRST instruction MIGHT be relaxed, |
8391 | assume that it will become a 3-byte instruction. | |
c138bc38 | 8392 | |
43cd72b9 BW |
8393 | Note again here that LOOP instructions are not bundleable, |
8394 | and this relaxation only applies to LOOP opcodes. */ | |
c138bc38 | 8395 | |
d77b99c9 | 8396 | int fill_size = 0; |
43cd72b9 BW |
8397 | int first_insn_size; |
8398 | int loop_insn_size; | |
8399 | addressT pre_opcode_bytes; | |
d77b99c9 | 8400 | int align_power; |
43cd72b9 BW |
8401 | fragS *first_insn; |
8402 | xtensa_opcode opcode; | |
8403 | bfd_boolean is_loop; | |
e0001a05 | 8404 | |
9c2799c2 NC |
8405 | gas_assert (fragP->fr_type == rs_machine_dependent); |
8406 | gas_assert (fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE); | |
e0001a05 | 8407 | |
43cd72b9 BW |
8408 | /* Find the loop frag. */ |
8409 | first_insn = next_non_empty_frag (fragP); | |
8410 | /* Now find the first insn frag. */ | |
8411 | first_insn = next_non_empty_frag (first_insn); | |
e0001a05 | 8412 | |
43cd72b9 | 8413 | is_loop = next_frag_opcode_is_loop (fragP, &opcode); |
9c2799c2 | 8414 | gas_assert (is_loop); |
43cd72b9 | 8415 | loop_insn_size = xg_get_single_size (opcode); |
e0001a05 | 8416 | |
43cd72b9 BW |
8417 | pre_opcode_bytes = next_frag_pre_opcode_bytes (fragP); |
8418 | pre_opcode_bytes += loop_insn_size; | |
e0001a05 | 8419 | |
43cd72b9 BW |
8420 | /* For loops, the alignment depends on the size of the |
8421 | instruction following the loop, not the LOOP instruction. */ | |
e0001a05 | 8422 | |
43cd72b9 | 8423 | if (first_insn == NULL) |
03aaa593 BW |
8424 | first_insn_size = xtensa_fetch_width; |
8425 | else | |
8426 | first_insn_size = get_loop_align_size (frag_format_size (first_insn)); | |
e0001a05 | 8427 | |
43cd72b9 | 8428 | /* If it was 8, then we'll need a larger alignment for the section. */ |
d77b99c9 BW |
8429 | align_power = get_text_align_power (first_insn_size); |
8430 | record_alignment (now_seg, align_power); | |
c138bc38 | 8431 | |
43cd72b9 | 8432 | fill_size = get_text_align_fill_size |
d77b99c9 BW |
8433 | (address + pre_opcode_bytes, align_power, first_insn_size, TRUE, |
8434 | fragP->tc_frag_data.is_no_density); | |
e0001a05 NC |
8435 | |
8436 | return address + fill_size; | |
8437 | } | |
8438 | ||
8439 | ||
43cd72b9 BW |
8440 | /* 3 mechanisms for relaxing an alignment: |
8441 | ||
8442 | Align to a power of 2. | |
8443 | Align so the next fragment's instruction does not cross a word boundary. | |
8444 | Align the current instruction so that if the next instruction | |
8445 | were 3 bytes, it would not cross a word boundary. | |
8446 | ||
e0001a05 NC |
8447 | We can align with: |
8448 | ||
43cd72b9 BW |
8449 | zeros - This is easy; always insert zeros. |
8450 | nops - 3-byte and 2-byte instructions | |
8451 | 2 - 2-byte nop | |
8452 | 3 - 3-byte nop | |
8453 | 4 - 2 2-byte nops | |
8454 | >=5 : 3-byte instruction + fn (n-3) | |
e0001a05 NC |
8455 | widening - widen previous instructions. */ |
8456 | ||
d77b99c9 BW |
8457 | static offsetT |
8458 | get_aligned_diff (fragS *fragP, addressT address, offsetT *max_diff) | |
e0001a05 | 8459 | { |
43cd72b9 BW |
8460 | addressT target_address, loop_insn_offset; |
8461 | int target_size; | |
8462 | xtensa_opcode loop_opcode; | |
8463 | bfd_boolean is_loop; | |
d77b99c9 BW |
8464 | int align_power; |
8465 | offsetT opt_diff; | |
5f9084e9 | 8466 | offsetT branch_align; |
def13efb | 8467 | fragS *loop_frag; |
e0001a05 | 8468 | |
9c2799c2 | 8469 | gas_assert (fragP->fr_type == rs_machine_dependent); |
43cd72b9 | 8470 | switch (fragP->fr_subtype) |
e0001a05 | 8471 | { |
43cd72b9 BW |
8472 | case RELAX_DESIRE_ALIGN: |
8473 | target_size = next_frag_format_size (fragP); | |
8474 | if (target_size == XTENSA_UNDEFINED) | |
8475 | target_size = 3; | |
664df4e4 BW |
8476 | align_power = branch_align_power (now_seg); |
8477 | branch_align = 1 << align_power; | |
0e5cd789 BW |
8478 | /* Don't count on the section alignment being as large as the target. */ |
8479 | if (target_size > branch_align) | |
8480 | target_size = branch_align; | |
d77b99c9 | 8481 | opt_diff = get_text_align_fill_size (address, align_power, |
43cd72b9 BW |
8482 | target_size, FALSE, FALSE); |
8483 | ||
664df4e4 BW |
8484 | *max_diff = (opt_diff + branch_align |
8485 | - (target_size + ((address + opt_diff) % branch_align))); | |
9c2799c2 | 8486 | gas_assert (*max_diff >= opt_diff); |
43cd72b9 | 8487 | return opt_diff; |
e0001a05 | 8488 | |
43cd72b9 | 8489 | case RELAX_ALIGN_NEXT_OPCODE: |
def13efb BW |
8490 | /* The next non-empty frag after this one holds the LOOP instruction |
8491 | that needs to be aligned. The required alignment depends on the | |
8492 | size of the next non-empty frag after the loop frag, i.e., the | |
8493 | first instruction in the loop. */ | |
8494 | loop_frag = next_non_empty_frag (fragP); | |
8495 | target_size = get_loop_align_size (next_frag_format_size (loop_frag)); | |
43cd72b9 BW |
8496 | loop_insn_offset = 0; |
8497 | is_loop = next_frag_opcode_is_loop (fragP, &loop_opcode); | |
9c2799c2 | 8498 | gas_assert (is_loop); |
43cd72b9 BW |
8499 | |
8500 | /* If the loop has been expanded then the LOOP instruction | |
8501 | could be at an offset from this fragment. */ | |
def13efb | 8502 | if (loop_frag->tc_frag_data.slot_subtypes[0] != RELAX_IMMED) |
43cd72b9 BW |
8503 | loop_insn_offset = get_expanded_loop_offset (loop_opcode); |
8504 | ||
43cd72b9 BW |
8505 | /* In an ideal world, which is what we are shooting for here, |
8506 | we wouldn't need to use any NOPs immediately prior to the | |
8507 | LOOP instruction. If this approach fails, relax_frag_loop_align | |
8508 | will call get_noop_aligned_address. */ | |
8509 | target_address = | |
8510 | address + loop_insn_offset + xg_get_single_size (loop_opcode); | |
def13efb | 8511 | align_power = get_text_align_power (target_size); |
d77b99c9 | 8512 | opt_diff = get_text_align_fill_size (target_address, align_power, |
43cd72b9 BW |
8513 | target_size, FALSE, FALSE); |
8514 | ||
8515 | *max_diff = xtensa_fetch_width | |
8516 | - ((target_address + opt_diff) % xtensa_fetch_width) | |
8517 | - target_size + opt_diff; | |
9c2799c2 | 8518 | gas_assert (*max_diff >= opt_diff); |
43cd72b9 | 8519 | return opt_diff; |
e0001a05 | 8520 | |
43cd72b9 BW |
8521 | default: |
8522 | break; | |
e0001a05 | 8523 | } |
9c2799c2 | 8524 | gas_assert (0); |
43cd72b9 | 8525 | return 0; |
e0001a05 NC |
8526 | } |
8527 | ||
8528 | \f | |
8529 | /* md_relax_frag Hook and Helper Functions. */ | |
8530 | ||
7fa3d080 BW |
8531 | static long relax_frag_loop_align (fragS *, long); |
8532 | static long relax_frag_for_align (fragS *, long); | |
8533 | static long relax_frag_immed | |
8534 | (segT, fragS *, long, int, xtensa_format, int, int *, bfd_boolean); | |
8535 | ||
8536 | ||
e0001a05 NC |
8537 | /* Return the number of bytes added to this fragment, given that the |
8538 | input has been stretched already by "stretch". */ | |
8539 | ||
8540 | long | |
7fa3d080 | 8541 | xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p) |
e0001a05 | 8542 | { |
43cd72b9 | 8543 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
8544 | int unreported = fragP->tc_frag_data.unreported_expansion; |
8545 | long new_stretch = 0; | |
8546 | char *file_name; | |
d77b99c9 BW |
8547 | unsigned line; |
8548 | int lit_size; | |
43cd72b9 BW |
8549 | static xtensa_insnbuf vbuf = NULL; |
8550 | int slot, num_slots; | |
8551 | xtensa_format fmt; | |
e0001a05 NC |
8552 | |
8553 | as_where (&file_name, &line); | |
8554 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8555 | ||
8556 | fragP->tc_frag_data.unreported_expansion = 0; | |
8557 | ||
8558 | switch (fragP->fr_subtype) | |
8559 | { | |
8560 | case RELAX_ALIGN_NEXT_OPCODE: | |
8561 | /* Always convert. */ | |
43cd72b9 BW |
8562 | if (fragP->tc_frag_data.relax_seen) |
8563 | new_stretch = relax_frag_loop_align (fragP, stretch); | |
e0001a05 NC |
8564 | break; |
8565 | ||
8566 | case RELAX_LOOP_END: | |
8567 | /* Do nothing. */ | |
8568 | break; | |
8569 | ||
8570 | case RELAX_LOOP_END_ADD_NOP: | |
8571 | /* Add a NOP and switch to .fill 0. */ | |
8572 | new_stretch = relax_frag_add_nop (fragP); | |
43cd72b9 | 8573 | frag_wane (fragP); |
e0001a05 NC |
8574 | break; |
8575 | ||
8576 | case RELAX_DESIRE_ALIGN: | |
43cd72b9 | 8577 | /* Do nothing. The narrowing before this frag will either align |
e0001a05 NC |
8578 | it or not. */ |
8579 | break; | |
8580 | ||
8581 | case RELAX_LITERAL: | |
8582 | case RELAX_LITERAL_FINAL: | |
8583 | return 0; | |
8584 | ||
8585 | case RELAX_LITERAL_NR: | |
8586 | lit_size = 4; | |
8587 | fragP->fr_subtype = RELAX_LITERAL_FINAL; | |
9c2799c2 | 8588 | gas_assert (unreported == lit_size); |
e0001a05 NC |
8589 | memset (&fragP->fr_literal[fragP->fr_fix], 0, 4); |
8590 | fragP->fr_var -= lit_size; | |
8591 | fragP->fr_fix += lit_size; | |
8592 | new_stretch = 4; | |
8593 | break; | |
8594 | ||
43cd72b9 BW |
8595 | case RELAX_SLOTS: |
8596 | if (vbuf == NULL) | |
8597 | vbuf = xtensa_insnbuf_alloc (isa); | |
8598 | ||
d77b99c9 BW |
8599 | xtensa_insnbuf_from_chars |
8600 | (isa, vbuf, (unsigned char *) fragP->fr_opcode, 0); | |
43cd72b9 BW |
8601 | fmt = xtensa_format_decode (isa, vbuf); |
8602 | num_slots = xtensa_format_num_slots (isa, fmt); | |
e0001a05 | 8603 | |
43cd72b9 BW |
8604 | for (slot = 0; slot < num_slots; slot++) |
8605 | { | |
8606 | switch (fragP->tc_frag_data.slot_subtypes[slot]) | |
8607 | { | |
8608 | case RELAX_NARROW: | |
8609 | if (fragP->tc_frag_data.relax_seen) | |
8610 | new_stretch += relax_frag_for_align (fragP, stretch); | |
8611 | break; | |
8612 | ||
8613 | case RELAX_IMMED: | |
8614 | case RELAX_IMMED_STEP1: | |
8615 | case RELAX_IMMED_STEP2: | |
b81bf389 | 8616 | case RELAX_IMMED_STEP3: |
43cd72b9 BW |
8617 | /* Place the immediate. */ |
8618 | new_stretch += relax_frag_immed | |
8619 | (now_seg, fragP, stretch, | |
8620 | fragP->tc_frag_data.slot_subtypes[slot] - RELAX_IMMED, | |
8621 | fmt, slot, stretched_p, FALSE); | |
8622 | break; | |
8623 | ||
8624 | default: | |
8625 | /* This is OK; see the note in xg_assemble_vliw_tokens. */ | |
8626 | break; | |
8627 | } | |
8628 | } | |
e0001a05 NC |
8629 | break; |
8630 | ||
8631 | case RELAX_LITERAL_POOL_BEGIN: | |
8632 | case RELAX_LITERAL_POOL_END: | |
43cd72b9 BW |
8633 | case RELAX_MAYBE_UNREACHABLE: |
8634 | case RELAX_MAYBE_DESIRE_ALIGN: | |
e0001a05 NC |
8635 | /* No relaxation required. */ |
8636 | break; | |
8637 | ||
43cd72b9 BW |
8638 | case RELAX_FILL_NOP: |
8639 | case RELAX_UNREACHABLE: | |
8640 | if (fragP->tc_frag_data.relax_seen) | |
8641 | new_stretch += relax_frag_for_align (fragP, stretch); | |
8642 | break; | |
8643 | ||
e0001a05 NC |
8644 | default: |
8645 | as_bad (_("bad relaxation state")); | |
8646 | } | |
8647 | ||
43cd72b9 | 8648 | /* Tell gas we need another relaxation pass. */ |
c138bc38 | 8649 | if (! fragP->tc_frag_data.relax_seen) |
43cd72b9 BW |
8650 | { |
8651 | fragP->tc_frag_data.relax_seen = TRUE; | |
8652 | *stretched_p = 1; | |
8653 | } | |
8654 | ||
e0001a05 NC |
8655 | new_logical_line (file_name, line); |
8656 | return new_stretch; | |
8657 | } | |
8658 | ||
8659 | ||
8660 | static long | |
7fa3d080 | 8661 | relax_frag_loop_align (fragS *fragP, long stretch) |
e0001a05 NC |
8662 | { |
8663 | addressT old_address, old_next_address, old_size; | |
8664 | addressT new_address, new_next_address, new_size; | |
8665 | addressT growth; | |
8666 | ||
43cd72b9 BW |
8667 | /* All the frags with relax_frag_for_alignment prior to this one in the |
8668 | section have been done, hopefully eliminating the need for a NOP here. | |
8669 | But, this will put it in if necessary. */ | |
e0001a05 NC |
8670 | |
8671 | /* Calculate the old address of this fragment and the next fragment. */ | |
8672 | old_address = fragP->fr_address - stretch; | |
8673 | old_next_address = (fragP->fr_address - stretch + fragP->fr_fix + | |
43cd72b9 | 8674 | fragP->tc_frag_data.text_expansion[0]); |
e0001a05 NC |
8675 | old_size = old_next_address - old_address; |
8676 | ||
8677 | /* Calculate the new address of this fragment and the next fragment. */ | |
8678 | new_address = fragP->fr_address; | |
8679 | new_next_address = | |
8680 | get_noop_aligned_address (fragP, fragP->fr_address + fragP->fr_fix); | |
8681 | new_size = new_next_address - new_address; | |
8682 | ||
8683 | growth = new_size - old_size; | |
8684 | ||
8685 | /* Fix up the text_expansion field and return the new growth. */ | |
43cd72b9 | 8686 | fragP->tc_frag_data.text_expansion[0] += growth; |
e0001a05 NC |
8687 | return growth; |
8688 | } | |
8689 | ||
8690 | ||
43cd72b9 | 8691 | /* Add a NOP instruction. */ |
e0001a05 NC |
8692 | |
8693 | static long | |
7fa3d080 | 8694 | relax_frag_add_nop (fragS *fragP) |
e0001a05 | 8695 | { |
e0001a05 | 8696 | char *nop_buf = fragP->fr_literal + fragP->fr_fix; |
43cd72b9 BW |
8697 | int length = fragP->tc_frag_data.is_no_density ? 3 : 2; |
8698 | assemble_nop (length, nop_buf); | |
e0001a05 | 8699 | fragP->tc_frag_data.is_insn = TRUE; |
e0001a05 | 8700 | |
e0001a05 NC |
8701 | if (fragP->fr_var < length) |
8702 | { | |
dd49a749 | 8703 | as_fatal (_("fr_var (%ld) < length (%d)"), (long) fragP->fr_var, length); |
e0001a05 NC |
8704 | return 0; |
8705 | } | |
8706 | ||
8707 | fragP->fr_fix += length; | |
8708 | fragP->fr_var -= length; | |
e0001a05 NC |
8709 | return length; |
8710 | } | |
8711 | ||
8712 | ||
7fa3d080 BW |
8713 | static long future_alignment_required (fragS *, long); |
8714 | ||
e0001a05 | 8715 | static long |
7fa3d080 | 8716 | relax_frag_for_align (fragS *fragP, long stretch) |
e0001a05 | 8717 | { |
43cd72b9 BW |
8718 | /* Overview of the relaxation procedure for alignment: |
8719 | We can widen with NOPs or by widening instructions or by filling | |
8720 | bytes after jump instructions. Find the opportune places and widen | |
8721 | them if necessary. */ | |
8722 | ||
8723 | long stretch_me; | |
8724 | long diff; | |
e0001a05 | 8725 | |
9c2799c2 | 8726 | gas_assert (fragP->fr_subtype == RELAX_FILL_NOP |
43cd72b9 BW |
8727 | || fragP->fr_subtype == RELAX_UNREACHABLE |
8728 | || (fragP->fr_subtype == RELAX_SLOTS | |
8729 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW)); | |
8730 | ||
8731 | stretch_me = future_alignment_required (fragP, stretch); | |
8732 | diff = stretch_me - fragP->tc_frag_data.text_expansion[0]; | |
8733 | if (diff == 0) | |
8734 | return 0; | |
e0001a05 | 8735 | |
43cd72b9 | 8736 | if (diff < 0) |
e0001a05 | 8737 | { |
43cd72b9 BW |
8738 | /* We expanded on a previous pass. Can we shrink now? */ |
8739 | long shrink = fragP->tc_frag_data.text_expansion[0] - stretch_me; | |
8740 | if (shrink <= stretch && stretch > 0) | |
e0001a05 | 8741 | { |
43cd72b9 BW |
8742 | fragP->tc_frag_data.text_expansion[0] = stretch_me; |
8743 | return -shrink; | |
e0001a05 NC |
8744 | } |
8745 | return 0; | |
8746 | } | |
8747 | ||
43cd72b9 BW |
8748 | /* Below here, diff > 0. */ |
8749 | fragP->tc_frag_data.text_expansion[0] = stretch_me; | |
e0001a05 | 8750 | |
43cd72b9 | 8751 | return diff; |
e0001a05 NC |
8752 | } |
8753 | ||
8754 | ||
43cd72b9 BW |
8755 | /* Return the address of the next frag that should be aligned. |
8756 | ||
8757 | By "address" we mean the address it _would_ be at if there | |
8758 | is no action taken to align it between here and the target frag. | |
8759 | In other words, if no narrows and no fill nops are used between | |
8760 | here and the frag to align, _even_if_ some of the frags we use | |
8761 | to align targets have already expanded on a previous relaxation | |
8762 | pass. | |
8763 | ||
8764 | Also, count each frag that may be used to help align the target. | |
8765 | ||
8766 | Return 0 if there are no frags left in the chain that need to be | |
8767 | aligned. */ | |
8768 | ||
8769 | static addressT | |
7fa3d080 BW |
8770 | find_address_of_next_align_frag (fragS **fragPP, |
8771 | int *wide_nops, | |
8772 | int *narrow_nops, | |
8773 | int *widens, | |
8774 | bfd_boolean *paddable) | |
e0001a05 | 8775 | { |
43cd72b9 BW |
8776 | fragS *fragP = *fragPP; |
8777 | addressT address = fragP->fr_address; | |
8778 | ||
8779 | /* Do not reset the counts to 0. */ | |
e0001a05 NC |
8780 | |
8781 | while (fragP) | |
8782 | { | |
8783 | /* Limit this to a small search. */ | |
b5e4a23d | 8784 | if (*widens >= (int) xtensa_fetch_width) |
43cd72b9 BW |
8785 | { |
8786 | *fragPP = fragP; | |
8787 | return 0; | |
8788 | } | |
e0001a05 NC |
8789 | address += fragP->fr_fix; |
8790 | ||
43cd72b9 BW |
8791 | if (fragP->fr_type == rs_fill) |
8792 | address += fragP->fr_offset * fragP->fr_var; | |
8793 | else if (fragP->fr_type == rs_machine_dependent) | |
e0001a05 | 8794 | { |
e0001a05 NC |
8795 | switch (fragP->fr_subtype) |
8796 | { | |
43cd72b9 BW |
8797 | case RELAX_UNREACHABLE: |
8798 | *paddable = TRUE; | |
8799 | break; | |
8800 | ||
8801 | case RELAX_FILL_NOP: | |
8802 | (*wide_nops)++; | |
8803 | if (!fragP->tc_frag_data.is_no_density) | |
8804 | (*narrow_nops)++; | |
8805 | break; | |
8806 | ||
8807 | case RELAX_SLOTS: | |
8808 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
8809 | { | |
8810 | (*widens)++; | |
8811 | break; | |
8812 | } | |
34e41783 | 8813 | address += total_frag_text_expansion (fragP);; |
e0001a05 NC |
8814 | break; |
8815 | ||
8816 | case RELAX_IMMED: | |
43cd72b9 | 8817 | address += fragP->tc_frag_data.text_expansion[0]; |
e0001a05 NC |
8818 | break; |
8819 | ||
8820 | case RELAX_ALIGN_NEXT_OPCODE: | |
8821 | case RELAX_DESIRE_ALIGN: | |
43cd72b9 BW |
8822 | *fragPP = fragP; |
8823 | return address; | |
8824 | ||
8825 | case RELAX_MAYBE_UNREACHABLE: | |
8826 | case RELAX_MAYBE_DESIRE_ALIGN: | |
8827 | /* Do nothing. */ | |
e0001a05 NC |
8828 | break; |
8829 | ||
8830 | default: | |
43cd72b9 BW |
8831 | /* Just punt if we don't know the type. */ |
8832 | *fragPP = fragP; | |
8833 | return 0; | |
e0001a05 | 8834 | } |
43cd72b9 | 8835 | } |
c138bc38 | 8836 | else |
43cd72b9 BW |
8837 | { |
8838 | /* Just punt if we don't know the type. */ | |
8839 | *fragPP = fragP; | |
8840 | return 0; | |
8841 | } | |
8842 | fragP = fragP->fr_next; | |
8843 | } | |
8844 | ||
8845 | *fragPP = fragP; | |
8846 | return 0; | |
8847 | } | |
8848 | ||
8849 | ||
7fa3d080 BW |
8850 | static long bytes_to_stretch (fragS *, int, int, int, int); |
8851 | ||
43cd72b9 | 8852 | static long |
7fa3d080 | 8853 | future_alignment_required (fragS *fragP, long stretch ATTRIBUTE_UNUSED) |
43cd72b9 BW |
8854 | { |
8855 | fragS *this_frag = fragP; | |
8856 | long address; | |
8857 | int num_widens = 0; | |
8858 | int wide_nops = 0; | |
8859 | int narrow_nops = 0; | |
8860 | bfd_boolean paddable = FALSE; | |
8861 | offsetT local_opt_diff; | |
8862 | offsetT opt_diff; | |
8863 | offsetT max_diff; | |
8864 | int stretch_amount = 0; | |
8865 | int local_stretch_amount; | |
8866 | int global_stretch_amount; | |
8867 | ||
7fa3d080 BW |
8868 | address = find_address_of_next_align_frag |
8869 | (&fragP, &wide_nops, &narrow_nops, &num_widens, &paddable); | |
43cd72b9 | 8870 | |
b5e4a23d BW |
8871 | if (!address) |
8872 | { | |
8873 | if (this_frag->tc_frag_data.is_aligning_branch) | |
8874 | this_frag->tc_frag_data.slot_subtypes[0] = RELAX_IMMED; | |
8875 | else | |
8876 | frag_wane (this_frag); | |
8877 | } | |
8878 | else | |
43cd72b9 BW |
8879 | { |
8880 | local_opt_diff = get_aligned_diff (fragP, address, &max_diff); | |
8881 | opt_diff = local_opt_diff; | |
9c2799c2 NC |
8882 | gas_assert (opt_diff >= 0); |
8883 | gas_assert (max_diff >= opt_diff); | |
c138bc38 | 8884 | if (max_diff == 0) |
43cd72b9 | 8885 | return 0; |
d2a033cd | 8886 | |
43cd72b9 BW |
8887 | if (fragP) |
8888 | fragP = fragP->fr_next; | |
8889 | ||
8890 | while (fragP && opt_diff < max_diff && address) | |
8891 | { | |
8892 | /* We only use these to determine if we can exit early | |
c138bc38 | 8893 | because there will be plenty of ways to align future |
43cd72b9 | 8894 | align frags. */ |
d77b99c9 | 8895 | int glob_widens = 0; |
43cd72b9 BW |
8896 | int dnn = 0; |
8897 | int dw = 0; | |
8898 | bfd_boolean glob_pad = 0; | |
7fa3d080 BW |
8899 | address = find_address_of_next_align_frag |
8900 | (&fragP, &glob_widens, &dnn, &dw, &glob_pad); | |
43cd72b9 | 8901 | /* If there is a padable portion, then skip. */ |
664df4e4 | 8902 | if (glob_pad || glob_widens >= (1 << branch_align_power (now_seg))) |
b5e4a23d | 8903 | address = 0; |
43cd72b9 | 8904 | |
c138bc38 | 8905 | if (address) |
43cd72b9 BW |
8906 | { |
8907 | offsetT next_m_diff; | |
8908 | offsetT next_o_diff; | |
8909 | ||
8910 | /* Downrange frags haven't had stretch added to them yet. */ | |
8911 | address += stretch; | |
8912 | ||
8913 | /* The address also includes any text expansion from this | |
8914 | frag in a previous pass, but we don't want that. */ | |
8915 | address -= this_frag->tc_frag_data.text_expansion[0]; | |
8916 | ||
8917 | /* Assume we are going to move at least opt_diff. In | |
8918 | reality, we might not be able to, but assuming that | |
8919 | we will helps catch cases where moving opt_diff pushes | |
8920 | the next target from aligned to unaligned. */ | |
8921 | address += opt_diff; | |
8922 | ||
8923 | next_o_diff = get_aligned_diff (fragP, address, &next_m_diff); | |
8924 | ||
8925 | /* Now cleanup for the adjustments to address. */ | |
8926 | next_o_diff += opt_diff; | |
8927 | next_m_diff += opt_diff; | |
8928 | if (next_o_diff <= max_diff && next_o_diff > opt_diff) | |
8929 | opt_diff = next_o_diff; | |
8930 | if (next_m_diff < max_diff) | |
8931 | max_diff = next_m_diff; | |
8932 | fragP = fragP->fr_next; | |
8933 | } | |
8934 | } | |
d2a033cd | 8935 | |
43cd72b9 BW |
8936 | /* If there are enough wideners in between, do it. */ |
8937 | if (paddable) | |
8938 | { | |
8939 | if (this_frag->fr_subtype == RELAX_UNREACHABLE) | |
8940 | { | |
9c2799c2 | 8941 | gas_assert (opt_diff <= UNREACHABLE_MAX_WIDTH); |
43cd72b9 BW |
8942 | return opt_diff; |
8943 | } | |
8944 | return 0; | |
8945 | } | |
c138bc38 | 8946 | local_stretch_amount |
43cd72b9 BW |
8947 | = bytes_to_stretch (this_frag, wide_nops, narrow_nops, |
8948 | num_widens, local_opt_diff); | |
c138bc38 BW |
8949 | global_stretch_amount |
8950 | = bytes_to_stretch (this_frag, wide_nops, narrow_nops, | |
43cd72b9 | 8951 | num_widens, opt_diff); |
c138bc38 BW |
8952 | /* If the condition below is true, then the frag couldn't |
8953 | stretch the correct amount for the global case, so we just | |
8954 | optimize locally. We'll rely on the subsequent frags to get | |
43cd72b9 BW |
8955 | the correct alignment in the global case. */ |
8956 | if (global_stretch_amount < local_stretch_amount) | |
8957 | stretch_amount = local_stretch_amount; | |
8958 | else | |
8959 | stretch_amount = global_stretch_amount; | |
d2a033cd | 8960 | |
43cd72b9 BW |
8961 | if (this_frag->fr_subtype == RELAX_SLOTS |
8962 | && this_frag->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
9c2799c2 | 8963 | gas_assert (stretch_amount <= 1); |
43cd72b9 BW |
8964 | else if (this_frag->fr_subtype == RELAX_FILL_NOP) |
8965 | { | |
8966 | if (this_frag->tc_frag_data.is_no_density) | |
9c2799c2 | 8967 | gas_assert (stretch_amount == 3 || stretch_amount == 0); |
43cd72b9 | 8968 | else |
9c2799c2 | 8969 | gas_assert (stretch_amount <= 3); |
43cd72b9 BW |
8970 | } |
8971 | } | |
8972 | return stretch_amount; | |
8973 | } | |
8974 | ||
8975 | ||
8976 | /* The idea: widen everything you can to get a target or loop aligned, | |
8977 | then start using NOPs. | |
8978 | ||
8979 | When we must have a NOP, here is a table of how we decide | |
8980 | (so you don't have to fight through the control flow below): | |
8981 | ||
8982 | wide_nops = the number of wide NOPs available for aligning | |
8983 | narrow_nops = the number of narrow NOPs available for aligning | |
8984 | (a subset of wide_nops) | |
8985 | widens = the number of narrow instructions that should be widened | |
8986 | ||
8987 | Desired wide narrow | |
8988 | Diff nop nop widens | |
8989 | 1 0 0 1 | |
8990 | 2 0 1 0 | |
8991 | 3a 1 0 0 | |
8992 | b 0 1 1 (case 3a makes this case unnecessary) | |
8993 | 4a 1 0 1 | |
8994 | b 0 2 0 | |
8995 | c 0 1 2 (case 4a makes this case unnecessary) | |
8996 | 5a 1 0 2 | |
8997 | b 1 1 0 | |
8998 | c 0 2 1 (case 5b makes this case unnecessary) | |
8999 | 6a 2 0 0 | |
9000 | b 1 0 3 | |
708587a4 | 9001 | c 0 1 4 (case 6b makes this case unnecessary) |
43cd72b9 BW |
9002 | d 1 1 1 (case 6a makes this case unnecessary) |
9003 | e 0 2 2 (case 6a makes this case unnecessary) | |
9004 | f 0 3 0 (case 6a makes this case unnecessary) | |
9005 | 7a 1 0 4 | |
9006 | b 2 0 1 | |
9007 | c 1 1 2 (case 7b makes this case unnecessary) | |
9008 | d 0 1 5 (case 7a makes this case unnecessary) | |
9009 | e 0 2 3 (case 7b makes this case unnecessary) | |
9010 | f 0 3 1 (case 7b makes this case unnecessary) | |
9011 | g 1 2 1 (case 7b makes this case unnecessary) | |
9012 | */ | |
9013 | ||
9014 | static long | |
7fa3d080 BW |
9015 | bytes_to_stretch (fragS *this_frag, |
9016 | int wide_nops, | |
9017 | int narrow_nops, | |
9018 | int num_widens, | |
9019 | int desired_diff) | |
43cd72b9 BW |
9020 | { |
9021 | int bytes_short = desired_diff - num_widens; | |
9022 | ||
9c2799c2 | 9023 | gas_assert (desired_diff >= 0 && desired_diff < 8); |
43cd72b9 BW |
9024 | if (desired_diff == 0) |
9025 | return 0; | |
c138bc38 | 9026 | |
9c2799c2 | 9027 | gas_assert (wide_nops > 0 || num_widens > 0); |
e0001a05 | 9028 | |
43cd72b9 BW |
9029 | /* Always prefer widening to NOP-filling. */ |
9030 | if (bytes_short < 0) | |
9031 | { | |
9032 | /* There are enough RELAX_NARROW frags after this one | |
9033 | to align the target without widening this frag in any way. */ | |
9034 | return 0; | |
9035 | } | |
c138bc38 | 9036 | |
43cd72b9 BW |
9037 | if (bytes_short == 0) |
9038 | { | |
9039 | /* Widen every narrow between here and the align target | |
9040 | and the align target will be properly aligned. */ | |
9041 | if (this_frag->fr_subtype == RELAX_FILL_NOP) | |
9042 | return 0; | |
9043 | else | |
9044 | return 1; | |
9045 | } | |
c138bc38 | 9046 | |
43cd72b9 BW |
9047 | /* From here we will need at least one NOP to get an alignment. |
9048 | However, we may not be able to align at all, in which case, | |
9049 | don't widen. */ | |
9050 | if (this_frag->fr_subtype == RELAX_FILL_NOP) | |
9051 | { | |
9052 | switch (desired_diff) | |
9053 | { | |
9054 | case 1: | |
9055 | return 0; | |
9056 | case 2: | |
9057 | if (!this_frag->tc_frag_data.is_no_density && narrow_nops == 1) | |
9058 | return 2; /* case 2 */ | |
9059 | return 0; | |
c138bc38 | 9060 | case 3: |
43cd72b9 BW |
9061 | if (wide_nops > 1) |
9062 | return 0; | |
9063 | else | |
9064 | return 3; /* case 3a */ | |
9065 | case 4: | |
9066 | if (num_widens >= 1 && wide_nops == 1) | |
9067 | return 3; /* case 4a */ | |
9068 | if (!this_frag->tc_frag_data.is_no_density && narrow_nops == 2) | |
9069 | return 2; /* case 4b */ | |
9070 | return 0; | |
9071 | case 5: | |
9072 | if (num_widens >= 2 && wide_nops == 1) | |
9073 | return 3; /* case 5a */ | |
c138bc38 | 9074 | /* We will need two nops. Are there enough nops |
43cd72b9 BW |
9075 | between here and the align target? */ |
9076 | if (wide_nops < 2 || narrow_nops == 0) | |
9077 | return 0; | |
9078 | /* Are there other nops closer that can serve instead? */ | |
9079 | if (wide_nops > 2 && narrow_nops > 1) | |
9080 | return 0; | |
9081 | /* Take the density one first, because there might not be | |
9082 | another density one available. */ | |
9083 | if (!this_frag->tc_frag_data.is_no_density) | |
9084 | return 2; /* case 5b narrow */ | |
9085 | else | |
9086 | return 3; /* case 5b wide */ | |
9087 | return 0; | |
9088 | case 6: | |
9089 | if (wide_nops == 2) | |
9090 | return 3; /* case 6a */ | |
9091 | else if (num_widens >= 3 && wide_nops == 1) | |
9092 | return 3; /* case 6b */ | |
9093 | return 0; | |
9094 | case 7: | |
9095 | if (wide_nops == 1 && num_widens >= 4) | |
9096 | return 3; /* case 7a */ | |
9097 | else if (wide_nops == 2 && num_widens >= 1) | |
9098 | return 3; /* case 7b */ | |
9099 | return 0; | |
e0001a05 | 9100 | default: |
9c2799c2 | 9101 | gas_assert (0); |
e0001a05 | 9102 | } |
e0001a05 | 9103 | } |
43cd72b9 BW |
9104 | else |
9105 | { | |
c138bc38 | 9106 | /* We will need a NOP no matter what, but should we widen |
43cd72b9 | 9107 | this instruction to help? |
e0001a05 | 9108 | |
03aaa593 | 9109 | This is a RELAX_NARROW frag. */ |
43cd72b9 BW |
9110 | switch (desired_diff) |
9111 | { | |
9112 | case 1: | |
9c2799c2 | 9113 | gas_assert (0); |
43cd72b9 BW |
9114 | return 0; |
9115 | case 2: | |
9116 | case 3: | |
9117 | return 0; | |
9118 | case 4: | |
9119 | if (wide_nops >= 1 && num_widens == 1) | |
9120 | return 1; /* case 4a */ | |
9121 | return 0; | |
9122 | case 5: | |
9123 | if (wide_nops >= 1 && num_widens == 2) | |
9124 | return 1; /* case 5a */ | |
9125 | return 0; | |
9126 | case 6: | |
9127 | if (wide_nops >= 2) | |
9128 | return 0; /* case 6a */ | |
9129 | else if (wide_nops >= 1 && num_widens == 3) | |
9130 | return 1; /* case 6b */ | |
9131 | return 0; | |
9132 | case 7: | |
9133 | if (wide_nops >= 1 && num_widens == 4) | |
9134 | return 1; /* case 7a */ | |
9135 | else if (wide_nops >= 2 && num_widens == 1) | |
9136 | return 1; /* case 7b */ | |
9137 | return 0; | |
9138 | default: | |
9c2799c2 | 9139 | gas_assert (0); |
43cd72b9 BW |
9140 | return 0; |
9141 | } | |
9142 | } | |
9c2799c2 | 9143 | gas_assert (0); |
43cd72b9 | 9144 | return 0; |
e0001a05 NC |
9145 | } |
9146 | ||
9147 | ||
9148 | static long | |
7fa3d080 BW |
9149 | relax_frag_immed (segT segP, |
9150 | fragS *fragP, | |
9151 | long stretch, | |
9152 | int min_steps, | |
9153 | xtensa_format fmt, | |
9154 | int slot, | |
9155 | int *stretched_p, | |
9156 | bfd_boolean estimate_only) | |
e0001a05 | 9157 | { |
43cd72b9 | 9158 | TInsn tinsn; |
e0001a05 NC |
9159 | int old_size; |
9160 | bfd_boolean negatable_branch = FALSE; | |
9161 | bfd_boolean branch_jmp_to_next = FALSE; | |
def13efb | 9162 | bfd_boolean from_wide_insn = FALSE; |
43cd72b9 | 9163 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
9164 | IStack istack; |
9165 | offsetT frag_offset; | |
9166 | int num_steps; | |
e0001a05 | 9167 | int num_text_bytes, num_literal_bytes; |
2276bc20 | 9168 | int literal_diff, total_text_diff, this_text_diff; |
e0001a05 | 9169 | |
9c2799c2 | 9170 | gas_assert (fragP->fr_opcode != NULL); |
e0001a05 | 9171 | |
b5e4a23d BW |
9172 | xg_clear_vinsn (&cur_vinsn); |
9173 | vinsn_from_chars (&cur_vinsn, fragP->fr_opcode); | |
b2d179be | 9174 | if (cur_vinsn.num_slots > 1) |
def13efb | 9175 | from_wide_insn = TRUE; |
43cd72b9 | 9176 | |
b5e4a23d | 9177 | tinsn = cur_vinsn.slots[slot]; |
43cd72b9 | 9178 | tinsn_immed_from_frag (&tinsn, fragP, slot); |
e0001a05 | 9179 | |
64b607e6 | 9180 | if (estimate_only && xtensa_opcode_is_loop (isa, tinsn.opcode) == 1) |
43cd72b9 | 9181 | return 0; |
e0001a05 | 9182 | |
b08b5071 | 9183 | if (workaround_b_j_loop_end && ! fragP->tc_frag_data.is_no_transform) |
43cd72b9 | 9184 | branch_jmp_to_next = is_branch_jmp_to_next (&tinsn, fragP); |
e0001a05 | 9185 | |
43cd72b9 | 9186 | negatable_branch = (xtensa_opcode_is_branch (isa, tinsn.opcode) == 1); |
e0001a05 | 9187 | |
43cd72b9 | 9188 | old_size = xtensa_format_length (isa, fmt); |
e0001a05 NC |
9189 | |
9190 | /* Special case: replace a branch to the next instruction with a NOP. | |
9191 | This is required to work around a hardware bug in T1040.0 and also | |
9192 | serves as an optimization. */ | |
9193 | ||
9194 | if (branch_jmp_to_next | |
9195 | && ((old_size == 2) || (old_size == 3)) | |
9196 | && !next_frag_is_loop_target (fragP)) | |
9197 | return 0; | |
9198 | ||
9199 | /* Here is the fun stuff: Get the immediate field from this | |
9200 | instruction. If it fits, we are done. If not, find the next | |
9201 | instruction sequence that fits. */ | |
9202 | ||
9203 | frag_offset = fragP->fr_opcode - fragP->fr_literal; | |
9204 | istack_init (&istack); | |
43cd72b9 | 9205 | num_steps = xg_assembly_relax (&istack, &tinsn, segP, fragP, frag_offset, |
e0001a05 | 9206 | min_steps, stretch); |
9c2799c2 | 9207 | gas_assert (num_steps >= min_steps && num_steps <= RELAX_IMMED_MAXSTEPS); |
e0001a05 | 9208 | |
43cd72b9 | 9209 | fragP->tc_frag_data.slot_subtypes[slot] = (int) RELAX_IMMED + num_steps; |
e0001a05 NC |
9210 | |
9211 | /* Figure out the number of bytes needed. */ | |
e0001a05 | 9212 | num_literal_bytes = get_num_stack_literal_bytes (&istack); |
2276bc20 BW |
9213 | literal_diff |
9214 | = num_literal_bytes - fragP->tc_frag_data.literal_expansion[slot]; | |
43cd72b9 | 9215 | num_text_bytes = get_num_stack_text_bytes (&istack); |
def13efb BW |
9216 | |
9217 | if (from_wide_insn) | |
43cd72b9 | 9218 | { |
2276bc20 BW |
9219 | int first = 0; |
9220 | while (istack.insn[first].opcode == XTENSA_UNDEFINED) | |
9221 | first++; | |
9222 | ||
43cd72b9 BW |
9223 | num_text_bytes += old_size; |
9224 | if (opcode_fits_format_slot (istack.insn[first].opcode, fmt, slot)) | |
9225 | num_text_bytes -= xg_get_single_size (istack.insn[first].opcode); | |
2276bc20 BW |
9226 | else |
9227 | { | |
9228 | /* The first instruction in the relaxed sequence will go after | |
9229 | the current wide instruction, and thus its symbolic immediates | |
9230 | might not fit. */ | |
9231 | ||
9232 | istack_init (&istack); | |
9233 | num_steps = xg_assembly_relax (&istack, &tinsn, segP, fragP, | |
9234 | frag_offset + old_size, | |
9235 | min_steps, stretch + old_size); | |
9c2799c2 | 9236 | gas_assert (num_steps >= min_steps && num_steps <= RELAX_IMMED_MAXSTEPS); |
2276bc20 BW |
9237 | |
9238 | fragP->tc_frag_data.slot_subtypes[slot] | |
9239 | = (int) RELAX_IMMED + num_steps; | |
9240 | ||
9241 | num_literal_bytes = get_num_stack_literal_bytes (&istack); | |
9242 | literal_diff | |
9243 | = num_literal_bytes - fragP->tc_frag_data.literal_expansion[slot]; | |
9244 | ||
9245 | num_text_bytes = get_num_stack_text_bytes (&istack) + old_size; | |
9246 | } | |
43cd72b9 | 9247 | } |
def13efb | 9248 | |
43cd72b9 BW |
9249 | total_text_diff = num_text_bytes - old_size; |
9250 | this_text_diff = total_text_diff - fragP->tc_frag_data.text_expansion[slot]; | |
e0001a05 NC |
9251 | |
9252 | /* It MUST get larger. If not, we could get an infinite loop. */ | |
9c2799c2 NC |
9253 | gas_assert (num_text_bytes >= 0); |
9254 | gas_assert (literal_diff >= 0); | |
9255 | gas_assert (total_text_diff >= 0); | |
e0001a05 | 9256 | |
43cd72b9 BW |
9257 | fragP->tc_frag_data.text_expansion[slot] = total_text_diff; |
9258 | fragP->tc_frag_data.literal_expansion[slot] = num_literal_bytes; | |
9c2799c2 NC |
9259 | gas_assert (fragP->tc_frag_data.text_expansion[slot] >= 0); |
9260 | gas_assert (fragP->tc_frag_data.literal_expansion[slot] >= 0); | |
e0001a05 NC |
9261 | |
9262 | /* Find the associated expandable literal for this. */ | |
9263 | if (literal_diff != 0) | |
9264 | { | |
2276bc20 | 9265 | fragS *lit_fragP = fragP->tc_frag_data.literal_frags[slot]; |
e0001a05 NC |
9266 | if (lit_fragP) |
9267 | { | |
9c2799c2 | 9268 | gas_assert (literal_diff == 4); |
e0001a05 NC |
9269 | lit_fragP->tc_frag_data.unreported_expansion += literal_diff; |
9270 | ||
9271 | /* We expect that the literal section state has NOT been | |
9272 | modified yet. */ | |
9c2799c2 | 9273 | gas_assert (lit_fragP->fr_type == rs_machine_dependent |
e0001a05 NC |
9274 | && lit_fragP->fr_subtype == RELAX_LITERAL); |
9275 | lit_fragP->fr_subtype = RELAX_LITERAL_NR; | |
9276 | ||
9277 | /* We need to mark this section for another iteration | |
9278 | of relaxation. */ | |
9279 | (*stretched_p)++; | |
9280 | } | |
9281 | } | |
9282 | ||
43cd72b9 | 9283 | if (negatable_branch && istack.ninsn > 1) |
1d19a770 | 9284 | update_next_frag_state (fragP); |
e0001a05 | 9285 | |
43cd72b9 | 9286 | return this_text_diff; |
e0001a05 NC |
9287 | } |
9288 | ||
9289 | \f | |
9290 | /* md_convert_frag Hook and Helper Functions. */ | |
9291 | ||
7fa3d080 BW |
9292 | static void convert_frag_align_next_opcode (fragS *); |
9293 | static void convert_frag_narrow (segT, fragS *, xtensa_format, int); | |
9294 | static void convert_frag_fill_nop (fragS *); | |
9295 | static void convert_frag_immed (segT, fragS *, int, xtensa_format, int); | |
9296 | ||
e0001a05 | 9297 | void |
7fa3d080 | 9298 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT sec, fragS *fragp) |
e0001a05 | 9299 | { |
43cd72b9 BW |
9300 | static xtensa_insnbuf vbuf = NULL; |
9301 | xtensa_isa isa = xtensa_default_isa; | |
9302 | int slot; | |
9303 | int num_slots; | |
9304 | xtensa_format fmt; | |
e0001a05 | 9305 | char *file_name; |
d77b99c9 | 9306 | unsigned line; |
e0001a05 NC |
9307 | |
9308 | as_where (&file_name, &line); | |
9309 | new_logical_line (fragp->fr_file, fragp->fr_line); | |
9310 | ||
9311 | switch (fragp->fr_subtype) | |
9312 | { | |
9313 | case RELAX_ALIGN_NEXT_OPCODE: | |
9314 | /* Always convert. */ | |
9315 | convert_frag_align_next_opcode (fragp); | |
9316 | break; | |
9317 | ||
9318 | case RELAX_DESIRE_ALIGN: | |
9319 | /* Do nothing. If not aligned already, too bad. */ | |
9320 | break; | |
9321 | ||
43cd72b9 BW |
9322 | case RELAX_LITERAL: |
9323 | case RELAX_LITERAL_FINAL: | |
9324 | break; | |
9325 | ||
9326 | case RELAX_SLOTS: | |
9327 | if (vbuf == NULL) | |
9328 | vbuf = xtensa_insnbuf_alloc (isa); | |
9329 | ||
d77b99c9 BW |
9330 | xtensa_insnbuf_from_chars |
9331 | (isa, vbuf, (unsigned char *) fragp->fr_opcode, 0); | |
43cd72b9 BW |
9332 | fmt = xtensa_format_decode (isa, vbuf); |
9333 | num_slots = xtensa_format_num_slots (isa, fmt); | |
9334 | ||
9335 | for (slot = 0; slot < num_slots; slot++) | |
9336 | { | |
9337 | switch (fragp->tc_frag_data.slot_subtypes[slot]) | |
9338 | { | |
9339 | case RELAX_NARROW: | |
9340 | convert_frag_narrow (sec, fragp, fmt, slot); | |
9341 | break; | |
9342 | ||
9343 | case RELAX_IMMED: | |
9344 | case RELAX_IMMED_STEP1: | |
9345 | case RELAX_IMMED_STEP2: | |
b81bf389 | 9346 | case RELAX_IMMED_STEP3: |
43cd72b9 BW |
9347 | /* Place the immediate. */ |
9348 | convert_frag_immed | |
9349 | (sec, fragp, | |
9350 | fragp->tc_frag_data.slot_subtypes[slot] - RELAX_IMMED, | |
9351 | fmt, slot); | |
9352 | break; | |
9353 | ||
9354 | default: | |
9355 | /* This is OK because some slots could have | |
9356 | relaxations and others have none. */ | |
9357 | break; | |
9358 | } | |
9359 | } | |
9360 | break; | |
9361 | ||
9362 | case RELAX_UNREACHABLE: | |
9363 | memset (&fragp->fr_literal[fragp->fr_fix], 0, fragp->fr_var); | |
9364 | fragp->fr_fix += fragp->tc_frag_data.text_expansion[0]; | |
9365 | fragp->fr_var -= fragp->tc_frag_data.text_expansion[0]; | |
9366 | frag_wane (fragp); | |
e0001a05 NC |
9367 | break; |
9368 | ||
43cd72b9 BW |
9369 | case RELAX_MAYBE_UNREACHABLE: |
9370 | case RELAX_MAYBE_DESIRE_ALIGN: | |
9371 | frag_wane (fragp); | |
e0001a05 NC |
9372 | break; |
9373 | ||
43cd72b9 BW |
9374 | case RELAX_FILL_NOP: |
9375 | convert_frag_fill_nop (fragp); | |
e0001a05 NC |
9376 | break; |
9377 | ||
9378 | case RELAX_LITERAL_NR: | |
9379 | if (use_literal_section) | |
9380 | { | |
9381 | /* This should have been handled during relaxation. When | |
9382 | relaxing a code segment, literals sometimes need to be | |
9383 | added to the corresponding literal segment. If that | |
9384 | literal segment has already been relaxed, then we end up | |
9385 | in this situation. Marking the literal segments as data | |
9386 | would make this happen less often (since GAS always relaxes | |
9387 | code before data), but we could still get into trouble if | |
9388 | there are instructions in a segment that is not marked as | |
9389 | containing code. Until we can implement a better solution, | |
9390 | cheat and adjust the addresses of all the following frags. | |
9391 | This could break subsequent alignments, but the linker's | |
9392 | literal coalescing will do that anyway. */ | |
9393 | ||
9394 | fragS *f; | |
9395 | fragp->fr_subtype = RELAX_LITERAL_FINAL; | |
9c2799c2 | 9396 | gas_assert (fragp->tc_frag_data.unreported_expansion == 4); |
e0001a05 NC |
9397 | memset (&fragp->fr_literal[fragp->fr_fix], 0, 4); |
9398 | fragp->fr_var -= 4; | |
9399 | fragp->fr_fix += 4; | |
9400 | for (f = fragp->fr_next; f; f = f->fr_next) | |
9401 | f->fr_address += 4; | |
9402 | } | |
9403 | else | |
9404 | as_bad (_("invalid relaxation fragment result")); | |
9405 | break; | |
9406 | } | |
9407 | ||
9408 | fragp->fr_var = 0; | |
9409 | new_logical_line (file_name, line); | |
9410 | } | |
9411 | ||
9412 | ||
7fa3d080 BW |
9413 | static void |
9414 | convert_frag_align_next_opcode (fragS *fragp) | |
e0001a05 NC |
9415 | { |
9416 | char *nop_buf; /* Location for Writing. */ | |
e0001a05 NC |
9417 | bfd_boolean use_no_density = fragp->tc_frag_data.is_no_density; |
9418 | addressT aligned_address; | |
d77b99c9 BW |
9419 | offsetT fill_size; |
9420 | int nop, nop_count; | |
e0001a05 NC |
9421 | |
9422 | aligned_address = get_noop_aligned_address (fragp, fragp->fr_address + | |
9423 | fragp->fr_fix); | |
9424 | fill_size = aligned_address - (fragp->fr_address + fragp->fr_fix); | |
9425 | nop_count = get_text_align_nop_count (fill_size, use_no_density); | |
9426 | nop_buf = fragp->fr_literal + fragp->fr_fix; | |
9427 | ||
d77b99c9 | 9428 | for (nop = 0; nop < nop_count; nop++) |
e0001a05 | 9429 | { |
d77b99c9 BW |
9430 | int nop_size; |
9431 | nop_size = get_text_align_nth_nop_size (fill_size, nop, use_no_density); | |
e0001a05 NC |
9432 | |
9433 | assemble_nop (nop_size, nop_buf); | |
9434 | nop_buf += nop_size; | |
9435 | } | |
9436 | ||
9437 | fragp->fr_fix += fill_size; | |
9438 | fragp->fr_var -= fill_size; | |
9439 | } | |
9440 | ||
9441 | ||
9442 | static void | |
7fa3d080 | 9443 | convert_frag_narrow (segT segP, fragS *fragP, xtensa_format fmt, int slot) |
e0001a05 | 9444 | { |
43cd72b9 | 9445 | TInsn tinsn, single_target; |
84b08ed9 | 9446 | int size, old_size, diff; |
e0001a05 NC |
9447 | offsetT frag_offset; |
9448 | ||
9c2799c2 | 9449 | gas_assert (slot == 0); |
43cd72b9 BW |
9450 | tinsn_from_chars (&tinsn, fragP->fr_opcode, 0); |
9451 | ||
b5e4a23d | 9452 | if (fragP->tc_frag_data.is_aligning_branch == 1) |
43cd72b9 | 9453 | { |
9c2799c2 | 9454 | gas_assert (fragP->tc_frag_data.text_expansion[0] == 1 |
43cd72b9 BW |
9455 | || fragP->tc_frag_data.text_expansion[0] == 0); |
9456 | convert_frag_immed (segP, fragP, fragP->tc_frag_data.text_expansion[0], | |
9457 | fmt, slot); | |
9458 | return; | |
9459 | } | |
9460 | ||
9461 | if (fragP->tc_frag_data.text_expansion[0] == 0) | |
e0001a05 NC |
9462 | { |
9463 | /* No conversion. */ | |
9464 | fragP->fr_var = 0; | |
9465 | return; | |
9466 | } | |
9467 | ||
9c2799c2 | 9468 | gas_assert (fragP->fr_opcode != NULL); |
e0001a05 | 9469 | |
43cd72b9 BW |
9470 | /* Frags in this relaxation state should only contain |
9471 | single instruction bundles. */ | |
9472 | tinsn_immed_from_frag (&tinsn, fragP, 0); | |
e0001a05 NC |
9473 | |
9474 | /* Just convert it to a wide form.... */ | |
9475 | size = 0; | |
43cd72b9 | 9476 | old_size = xg_get_single_size (tinsn.opcode); |
e0001a05 NC |
9477 | |
9478 | tinsn_init (&single_target); | |
9479 | frag_offset = fragP->fr_opcode - fragP->fr_literal; | |
9480 | ||
84b08ed9 | 9481 | if (! xg_is_single_relaxable_insn (&tinsn, &single_target, FALSE)) |
43cd72b9 BW |
9482 | { |
9483 | as_bad (_("unable to widen instruction")); | |
9484 | return; | |
9485 | } | |
9486 | ||
9487 | size = xg_get_single_size (single_target.opcode); | |
b2d179be BW |
9488 | xg_emit_insn_to_buf (&single_target, fragP->fr_opcode, fragP, |
9489 | frag_offset, TRUE); | |
e0001a05 NC |
9490 | |
9491 | diff = size - old_size; | |
9c2799c2 NC |
9492 | gas_assert (diff >= 0); |
9493 | gas_assert (diff <= fragP->fr_var); | |
e0001a05 NC |
9494 | fragP->fr_var -= diff; |
9495 | fragP->fr_fix += diff; | |
9496 | ||
9497 | /* clean it up */ | |
9498 | fragP->fr_var = 0; | |
9499 | } | |
9500 | ||
9501 | ||
9502 | static void | |
7fa3d080 | 9503 | convert_frag_fill_nop (fragS *fragP) |
43cd72b9 BW |
9504 | { |
9505 | char *loc = &fragP->fr_literal[fragP->fr_fix]; | |
9506 | int size = fragP->tc_frag_data.text_expansion[0]; | |
9c2799c2 | 9507 | gas_assert ((unsigned) size == (fragP->fr_next->fr_address |
43cd72b9 BW |
9508 | - fragP->fr_address - fragP->fr_fix)); |
9509 | if (size == 0) | |
9510 | { | |
9511 | /* No conversion. */ | |
9512 | fragP->fr_var = 0; | |
9513 | return; | |
9514 | } | |
9515 | assemble_nop (size, loc); | |
9516 | fragP->tc_frag_data.is_insn = TRUE; | |
9517 | fragP->fr_var -= size; | |
9518 | fragP->fr_fix += size; | |
9519 | frag_wane (fragP); | |
9520 | } | |
9521 | ||
9522 | ||
7fa3d080 BW |
9523 | static fixS *fix_new_exp_in_seg |
9524 | (segT, subsegT, fragS *, int, int, expressionS *, int, | |
9525 | bfd_reloc_code_real_type); | |
9526 | static void convert_frag_immed_finish_loop (segT, fragS *, TInsn *); | |
9527 | ||
43cd72b9 | 9528 | static void |
7fa3d080 BW |
9529 | convert_frag_immed (segT segP, |
9530 | fragS *fragP, | |
9531 | int min_steps, | |
9532 | xtensa_format fmt, | |
9533 | int slot) | |
e0001a05 NC |
9534 | { |
9535 | char *immed_instr = fragP->fr_opcode; | |
43cd72b9 | 9536 | TInsn orig_tinsn; |
e0001a05 | 9537 | bfd_boolean expanded = FALSE; |
e0001a05 | 9538 | bfd_boolean branch_jmp_to_next = FALSE; |
43cd72b9 | 9539 | char *fr_opcode = fragP->fr_opcode; |
43cd72b9 | 9540 | xtensa_isa isa = xtensa_default_isa; |
def13efb | 9541 | bfd_boolean from_wide_insn = FALSE; |
43cd72b9 BW |
9542 | int bytes; |
9543 | bfd_boolean is_loop; | |
e0001a05 | 9544 | |
9c2799c2 | 9545 | gas_assert (fr_opcode != NULL); |
e0001a05 | 9546 | |
b5e4a23d | 9547 | xg_clear_vinsn (&cur_vinsn); |
e0001a05 | 9548 | |
b5e4a23d | 9549 | vinsn_from_chars (&cur_vinsn, fr_opcode); |
b2d179be | 9550 | if (cur_vinsn.num_slots > 1) |
def13efb | 9551 | from_wide_insn = TRUE; |
e0001a05 | 9552 | |
b5e4a23d | 9553 | orig_tinsn = cur_vinsn.slots[slot]; |
43cd72b9 BW |
9554 | tinsn_immed_from_frag (&orig_tinsn, fragP, slot); |
9555 | ||
9556 | is_loop = xtensa_opcode_is_loop (xtensa_default_isa, orig_tinsn.opcode) == 1; | |
e0001a05 | 9557 | |
b08b5071 | 9558 | if (workaround_b_j_loop_end && ! fragP->tc_frag_data.is_no_transform) |
43cd72b9 | 9559 | branch_jmp_to_next = is_branch_jmp_to_next (&orig_tinsn, fragP); |
e0001a05 NC |
9560 | |
9561 | if (branch_jmp_to_next && !next_frag_is_loop_target (fragP)) | |
9562 | { | |
9563 | /* Conversion just inserts a NOP and marks the fix as completed. */ | |
43cd72b9 BW |
9564 | bytes = xtensa_format_length (isa, fmt); |
9565 | if (bytes >= 4) | |
9566 | { | |
b5e4a23d BW |
9567 | cur_vinsn.slots[slot].opcode = |
9568 | xtensa_format_slot_nop_opcode (isa, cur_vinsn.format, slot); | |
9569 | cur_vinsn.slots[slot].ntok = 0; | |
43cd72b9 BW |
9570 | } |
9571 | else | |
9572 | { | |
9573 | bytes += fragP->tc_frag_data.text_expansion[0]; | |
9c2799c2 | 9574 | gas_assert (bytes == 2 || bytes == 3); |
b5e4a23d | 9575 | build_nop (&cur_vinsn.slots[0], bytes); |
43cd72b9 BW |
9576 | fragP->fr_fix += fragP->tc_frag_data.text_expansion[0]; |
9577 | } | |
e7da6241 | 9578 | vinsn_to_insnbuf (&cur_vinsn, fr_opcode, frag_now, TRUE); |
d77b99c9 | 9579 | xtensa_insnbuf_to_chars |
b5e4a23d | 9580 | (isa, cur_vinsn.insnbuf, (unsigned char *) fr_opcode, 0); |
e0001a05 NC |
9581 | fragP->fr_var = 0; |
9582 | } | |
7c834684 | 9583 | else |
e0001a05 | 9584 | { |
43cd72b9 BW |
9585 | /* Here is the fun stuff: Get the immediate field from this |
9586 | instruction. If it fits, we're done. If not, find the next | |
9587 | instruction sequence that fits. */ | |
9588 | ||
e0001a05 NC |
9589 | IStack istack; |
9590 | int i; | |
9591 | symbolS *lit_sym = NULL; | |
9592 | int total_size = 0; | |
43cd72b9 | 9593 | int target_offset = 0; |
e0001a05 NC |
9594 | int old_size; |
9595 | int diff; | |
9596 | symbolS *gen_label = NULL; | |
9597 | offsetT frag_offset; | |
43cd72b9 BW |
9598 | bfd_boolean first = TRUE; |
9599 | bfd_boolean last_is_jump; | |
e0001a05 | 9600 | |
43cd72b9 | 9601 | /* It does not fit. Find something that does and |
e0001a05 | 9602 | convert immediately. */ |
43cd72b9 | 9603 | frag_offset = fr_opcode - fragP->fr_literal; |
e0001a05 | 9604 | istack_init (&istack); |
43cd72b9 | 9605 | xg_assembly_relax (&istack, &orig_tinsn, |
e0001a05 NC |
9606 | segP, fragP, frag_offset, min_steps, 0); |
9607 | ||
43cd72b9 | 9608 | old_size = xtensa_format_length (isa, fmt); |
e0001a05 NC |
9609 | |
9610 | /* Assemble this right inline. */ | |
9611 | ||
9612 | /* First, create the mapping from a label name to the REAL label. */ | |
43cd72b9 | 9613 | target_offset = 0; |
e0001a05 NC |
9614 | for (i = 0; i < istack.ninsn; i++) |
9615 | { | |
43cd72b9 | 9616 | TInsn *tinsn = &istack.insn[i]; |
e0001a05 NC |
9617 | fragS *lit_frag; |
9618 | ||
43cd72b9 | 9619 | switch (tinsn->insn_type) |
e0001a05 NC |
9620 | { |
9621 | case ITYPE_LITERAL: | |
9622 | if (lit_sym != NULL) | |
9623 | as_bad (_("multiple literals in expansion")); | |
9624 | /* First find the appropriate space in the literal pool. */ | |
43cd72b9 | 9625 | lit_frag = fragP->tc_frag_data.literal_frags[slot]; |
e0001a05 NC |
9626 | if (lit_frag == NULL) |
9627 | as_bad (_("no registered fragment for literal")); | |
43cd72b9 | 9628 | if (tinsn->ntok != 1) |
e0001a05 NC |
9629 | as_bad (_("number of literal tokens != 1")); |
9630 | ||
9631 | /* Set the literal symbol and add a fixup. */ | |
9632 | lit_sym = lit_frag->fr_symbol; | |
9633 | break; | |
9634 | ||
9635 | case ITYPE_LABEL: | |
43cd72b9 BW |
9636 | if (align_targets && !is_loop) |
9637 | { | |
9638 | fragS *unreach = fragP->fr_next; | |
9639 | while (!(unreach->fr_type == rs_machine_dependent | |
9640 | && (unreach->fr_subtype == RELAX_MAYBE_UNREACHABLE | |
9641 | || unreach->fr_subtype == RELAX_UNREACHABLE))) | |
9642 | { | |
9643 | unreach = unreach->fr_next; | |
9644 | } | |
9645 | ||
9c2799c2 | 9646 | gas_assert (unreach->fr_type == rs_machine_dependent |
43cd72b9 BW |
9647 | && (unreach->fr_subtype == RELAX_MAYBE_UNREACHABLE |
9648 | || unreach->fr_subtype == RELAX_UNREACHABLE)); | |
9649 | ||
9650 | target_offset += unreach->tc_frag_data.text_expansion[0]; | |
9651 | } | |
9c2799c2 | 9652 | gas_assert (gen_label == NULL); |
e0001a05 | 9653 | gen_label = symbol_new (FAKE_LABEL_NAME, now_seg, |
43cd72b9 BW |
9654 | fr_opcode - fragP->fr_literal |
9655 | + target_offset, fragP); | |
e0001a05 NC |
9656 | break; |
9657 | ||
9658 | case ITYPE_INSN: | |
def13efb | 9659 | if (first && from_wide_insn) |
43cd72b9 BW |
9660 | { |
9661 | target_offset += xtensa_format_length (isa, fmt); | |
9662 | first = FALSE; | |
9663 | if (!opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
9664 | target_offset += xg_get_single_size (tinsn->opcode); | |
9665 | } | |
9666 | else | |
9667 | target_offset += xg_get_single_size (tinsn->opcode); | |
e0001a05 NC |
9668 | break; |
9669 | } | |
9670 | } | |
9671 | ||
9672 | total_size = 0; | |
43cd72b9 BW |
9673 | first = TRUE; |
9674 | last_is_jump = FALSE; | |
e0001a05 NC |
9675 | for (i = 0; i < istack.ninsn; i++) |
9676 | { | |
43cd72b9 | 9677 | TInsn *tinsn = &istack.insn[i]; |
e0001a05 NC |
9678 | fragS *lit_frag; |
9679 | int size; | |
9680 | segT target_seg; | |
43cd72b9 | 9681 | bfd_reloc_code_real_type reloc_type; |
e0001a05 | 9682 | |
43cd72b9 | 9683 | switch (tinsn->insn_type) |
e0001a05 NC |
9684 | { |
9685 | case ITYPE_LITERAL: | |
43cd72b9 BW |
9686 | lit_frag = fragP->tc_frag_data.literal_frags[slot]; |
9687 | /* Already checked. */ | |
9c2799c2 NC |
9688 | gas_assert (lit_frag != NULL); |
9689 | gas_assert (lit_sym != NULL); | |
9690 | gas_assert (tinsn->ntok == 1); | |
43cd72b9 | 9691 | /* Add a fixup. */ |
e0001a05 | 9692 | target_seg = S_GET_SEGMENT (lit_sym); |
9c2799c2 | 9693 | gas_assert (target_seg); |
28dbbc02 | 9694 | reloc_type = map_operator_to_reloc (tinsn->tok[0].X_op, TRUE); |
e0001a05 | 9695 | fix_new_exp_in_seg (target_seg, 0, lit_frag, 0, 4, |
43cd72b9 | 9696 | &tinsn->tok[0], FALSE, reloc_type); |
e0001a05 NC |
9697 | break; |
9698 | ||
9699 | case ITYPE_LABEL: | |
9700 | break; | |
9701 | ||
9702 | case ITYPE_INSN: | |
43cd72b9 BW |
9703 | xg_resolve_labels (tinsn, gen_label); |
9704 | xg_resolve_literals (tinsn, lit_sym); | |
def13efb | 9705 | if (from_wide_insn && first) |
43cd72b9 BW |
9706 | { |
9707 | first = FALSE; | |
9708 | if (opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
9709 | { | |
b5e4a23d | 9710 | cur_vinsn.slots[slot] = *tinsn; |
43cd72b9 BW |
9711 | } |
9712 | else | |
9713 | { | |
b5e4a23d | 9714 | cur_vinsn.slots[slot].opcode = |
43cd72b9 | 9715 | xtensa_format_slot_nop_opcode (isa, fmt, slot); |
b5e4a23d | 9716 | cur_vinsn.slots[slot].ntok = 0; |
43cd72b9 | 9717 | } |
b5e4a23d BW |
9718 | vinsn_to_insnbuf (&cur_vinsn, immed_instr, fragP, TRUE); |
9719 | xtensa_insnbuf_to_chars (isa, cur_vinsn.insnbuf, | |
d77b99c9 | 9720 | (unsigned char *) immed_instr, 0); |
43cd72b9 BW |
9721 | fragP->tc_frag_data.is_insn = TRUE; |
9722 | size = xtensa_format_length (isa, fmt); | |
9723 | if (!opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
9724 | { | |
43cd72b9 | 9725 | xg_emit_insn_to_buf |
b2d179be | 9726 | (tinsn, immed_instr + size, fragP, |
43cd72b9 BW |
9727 | immed_instr - fragP->fr_literal + size, TRUE); |
9728 | size += xg_get_single_size (tinsn->opcode); | |
9729 | } | |
9730 | } | |
9731 | else | |
9732 | { | |
43cd72b9 | 9733 | size = xg_get_single_size (tinsn->opcode); |
b2d179be | 9734 | xg_emit_insn_to_buf (tinsn, immed_instr, fragP, |
43cd72b9 | 9735 | immed_instr - fragP->fr_literal, TRUE); |
43cd72b9 | 9736 | } |
e0001a05 | 9737 | immed_instr += size; |
43cd72b9 | 9738 | total_size += size; |
e0001a05 NC |
9739 | break; |
9740 | } | |
9741 | } | |
9742 | ||
9743 | diff = total_size - old_size; | |
9c2799c2 | 9744 | gas_assert (diff >= 0); |
e0001a05 NC |
9745 | if (diff != 0) |
9746 | expanded = TRUE; | |
9c2799c2 | 9747 | gas_assert (diff <= fragP->fr_var); |
e0001a05 NC |
9748 | fragP->fr_var -= diff; |
9749 | fragP->fr_fix += diff; | |
9750 | } | |
9751 | ||
e0001a05 | 9752 | /* Check for undefined immediates in LOOP instructions. */ |
43cd72b9 | 9753 | if (is_loop) |
e0001a05 NC |
9754 | { |
9755 | symbolS *sym; | |
43cd72b9 | 9756 | sym = orig_tinsn.tok[1].X_add_symbol; |
e0001a05 NC |
9757 | if (sym != NULL && !S_IS_DEFINED (sym)) |
9758 | { | |
9759 | as_bad (_("unresolved loop target symbol: %s"), S_GET_NAME (sym)); | |
9760 | return; | |
9761 | } | |
43cd72b9 | 9762 | sym = orig_tinsn.tok[1].X_op_symbol; |
e0001a05 NC |
9763 | if (sym != NULL && !S_IS_DEFINED (sym)) |
9764 | { | |
9765 | as_bad (_("unresolved loop target symbol: %s"), S_GET_NAME (sym)); | |
9766 | return; | |
9767 | } | |
9768 | } | |
9769 | ||
43cd72b9 BW |
9770 | if (expanded && xtensa_opcode_is_loop (isa, orig_tinsn.opcode) == 1) |
9771 | convert_frag_immed_finish_loop (segP, fragP, &orig_tinsn); | |
e0001a05 | 9772 | |
43cd72b9 | 9773 | if (expanded && is_direct_call_opcode (orig_tinsn.opcode)) |
e0001a05 NC |
9774 | { |
9775 | /* Add an expansion note on the expanded instruction. */ | |
9776 | fix_new_exp_in_seg (now_seg, 0, fragP, fr_opcode - fragP->fr_literal, 4, | |
43cd72b9 | 9777 | &orig_tinsn.tok[0], TRUE, |
e0001a05 | 9778 | BFD_RELOC_XTENSA_ASM_EXPAND); |
e0001a05 NC |
9779 | } |
9780 | } | |
9781 | ||
9782 | ||
9783 | /* Add a new fix expression into the desired segment. We have to | |
9784 | switch to that segment to do this. */ | |
9785 | ||
9786 | static fixS * | |
7fa3d080 BW |
9787 | fix_new_exp_in_seg (segT new_seg, |
9788 | subsegT new_subseg, | |
9789 | fragS *frag, | |
9790 | int where, | |
9791 | int size, | |
9792 | expressionS *exp, | |
9793 | int pcrel, | |
9794 | bfd_reloc_code_real_type r_type) | |
e0001a05 NC |
9795 | { |
9796 | fixS *new_fix; | |
9797 | segT seg = now_seg; | |
9798 | subsegT subseg = now_subseg; | |
43cd72b9 | 9799 | |
9c2799c2 | 9800 | gas_assert (new_seg != 0); |
e0001a05 NC |
9801 | subseg_set (new_seg, new_subseg); |
9802 | ||
e0001a05 NC |
9803 | new_fix = fix_new_exp (frag, where, size, exp, pcrel, r_type); |
9804 | subseg_set (seg, subseg); | |
9805 | return new_fix; | |
9806 | } | |
9807 | ||
9808 | ||
43cd72b9 BW |
9809 | /* Relax a loop instruction so that it can span loop >256 bytes. |
9810 | ||
9811 | loop as, .L1 | |
9812 | .L0: | |
9813 | rsr as, LEND | |
9814 | wsr as, LBEG | |
9815 | addi as, as, lo8 (label-.L1) | |
9816 | addmi as, as, mid8 (label-.L1) | |
9817 | wsr as, LEND | |
9818 | isync | |
9819 | rsr as, LCOUNT | |
9820 | addi as, as, 1 | |
9821 | .L1: | |
9822 | <<body>> | |
9823 | label: | |
9824 | */ | |
e0001a05 NC |
9825 | |
9826 | static void | |
7fa3d080 | 9827 | convert_frag_immed_finish_loop (segT segP, fragS *fragP, TInsn *tinsn) |
e0001a05 NC |
9828 | { |
9829 | TInsn loop_insn; | |
9830 | TInsn addi_insn; | |
9831 | TInsn addmi_insn; | |
9832 | unsigned long target; | |
9833 | static xtensa_insnbuf insnbuf = NULL; | |
9834 | unsigned int loop_length, loop_length_hi, loop_length_lo; | |
9835 | xtensa_isa isa = xtensa_default_isa; | |
9836 | addressT loop_offset; | |
9837 | addressT addi_offset = 9; | |
9838 | addressT addmi_offset = 12; | |
43cd72b9 | 9839 | fragS *next_fragP; |
d77b99c9 | 9840 | int target_count; |
e0001a05 NC |
9841 | |
9842 | if (!insnbuf) | |
9843 | insnbuf = xtensa_insnbuf_alloc (isa); | |
9844 | ||
9845 | /* Get the loop offset. */ | |
43cd72b9 | 9846 | loop_offset = get_expanded_loop_offset (tinsn->opcode); |
e0001a05 | 9847 | |
43cd72b9 BW |
9848 | /* Validate that there really is a LOOP at the loop_offset. Because |
9849 | loops are not bundleable, we can assume that the instruction will be | |
9850 | in slot 0. */ | |
9851 | tinsn_from_chars (&loop_insn, fragP->fr_opcode + loop_offset, 0); | |
9852 | tinsn_immed_from_frag (&loop_insn, fragP, 0); | |
9853 | ||
9c2799c2 | 9854 | gas_assert (xtensa_opcode_is_loop (isa, loop_insn.opcode) == 1); |
e0001a05 NC |
9855 | addi_offset += loop_offset; |
9856 | addmi_offset += loop_offset; | |
9857 | ||
9c2799c2 | 9858 | gas_assert (tinsn->ntok == 2); |
b08b5071 BW |
9859 | if (tinsn->tok[1].X_op == O_constant) |
9860 | target = tinsn->tok[1].X_add_number; | |
9861 | else if (tinsn->tok[1].X_op == O_symbol) | |
9862 | { | |
9863 | /* Find the fragment. */ | |
9864 | symbolS *sym = tinsn->tok[1].X_add_symbol; | |
9c2799c2 | 9865 | gas_assert (S_GET_SEGMENT (sym) == segP |
b08b5071 BW |
9866 | || S_GET_SEGMENT (sym) == absolute_section); |
9867 | target = (S_GET_VALUE (sym) + tinsn->tok[1].X_add_number); | |
9868 | } | |
9869 | else | |
9870 | { | |
9871 | as_bad (_("invalid expression evaluation type %d"), tinsn->tok[1].X_op); | |
9872 | target = 0; | |
9873 | } | |
e0001a05 | 9874 | |
e0001a05 NC |
9875 | loop_length = target - (fragP->fr_address + fragP->fr_fix); |
9876 | loop_length_hi = loop_length & ~0x0ff; | |
9877 | loop_length_lo = loop_length & 0x0ff; | |
9878 | if (loop_length_lo >= 128) | |
9879 | { | |
9880 | loop_length_lo -= 256; | |
9881 | loop_length_hi += 256; | |
9882 | } | |
9883 | ||
43cd72b9 | 9884 | /* Because addmi sign-extends the immediate, 'loop_length_hi' can be at most |
e0001a05 NC |
9885 | 32512. If the loop is larger than that, then we just fail. */ |
9886 | if (loop_length_hi > 32512) | |
9887 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
9888 | _("loop too long for LOOP instruction")); | |
9889 | ||
43cd72b9 | 9890 | tinsn_from_chars (&addi_insn, fragP->fr_opcode + addi_offset, 0); |
9c2799c2 | 9891 | gas_assert (addi_insn.opcode == xtensa_addi_opcode); |
e0001a05 | 9892 | |
43cd72b9 | 9893 | tinsn_from_chars (&addmi_insn, fragP->fr_opcode + addmi_offset, 0); |
9c2799c2 | 9894 | gas_assert (addmi_insn.opcode == xtensa_addmi_opcode); |
e0001a05 NC |
9895 | |
9896 | set_expr_const (&addi_insn.tok[2], loop_length_lo); | |
9897 | tinsn_to_insnbuf (&addi_insn, insnbuf); | |
43cd72b9 | 9898 | |
e0001a05 | 9899 | fragP->tc_frag_data.is_insn = TRUE; |
d77b99c9 BW |
9900 | xtensa_insnbuf_to_chars |
9901 | (isa, insnbuf, (unsigned char *) fragP->fr_opcode + addi_offset, 0); | |
e0001a05 NC |
9902 | |
9903 | set_expr_const (&addmi_insn.tok[2], loop_length_hi); | |
9904 | tinsn_to_insnbuf (&addmi_insn, insnbuf); | |
d77b99c9 BW |
9905 | xtensa_insnbuf_to_chars |
9906 | (isa, insnbuf, (unsigned char *) fragP->fr_opcode + addmi_offset, 0); | |
43cd72b9 BW |
9907 | |
9908 | /* Walk through all of the frags from here to the loop end | |
9909 | and mark them as no_transform to keep them from being modified | |
9910 | by the linker. If we ever have a relocation for the | |
9911 | addi/addmi of the difference of two symbols we can remove this. */ | |
9912 | ||
9913 | target_count = 0; | |
9914 | for (next_fragP = fragP; next_fragP != NULL; | |
9915 | next_fragP = next_fragP->fr_next) | |
9916 | { | |
b08b5071 | 9917 | next_fragP->tc_frag_data.is_no_transform = TRUE; |
43cd72b9 BW |
9918 | if (next_fragP->tc_frag_data.is_loop_target) |
9919 | target_count++; | |
9920 | if (target_count == 2) | |
9921 | break; | |
9922 | } | |
e0001a05 NC |
9923 | } |
9924 | ||
b08b5071 BW |
9925 | \f |
9926 | /* A map that keeps information on a per-subsegment basis. This is | |
9927 | maintained during initial assembly, but is invalid once the | |
9928 | subsegments are smashed together. I.E., it cannot be used during | |
9929 | the relaxation. */ | |
e0001a05 | 9930 | |
b08b5071 | 9931 | typedef struct subseg_map_struct |
e0001a05 | 9932 | { |
b08b5071 BW |
9933 | /* the key */ |
9934 | segT seg; | |
9935 | subsegT subseg; | |
e0001a05 | 9936 | |
b08b5071 BW |
9937 | /* the data */ |
9938 | unsigned flags; | |
9939 | float total_freq; /* fall-through + branch target frequency */ | |
9940 | float target_freq; /* branch target frequency alone */ | |
9941 | ||
9942 | struct subseg_map_struct *next; | |
9943 | } subseg_map; | |
e0001a05 | 9944 | |
e0001a05 | 9945 | |
e0001a05 NC |
9946 | static subseg_map *sseg_map = NULL; |
9947 | ||
43cd72b9 | 9948 | static subseg_map * |
7fa3d080 | 9949 | get_subseg_info (segT seg, subsegT subseg) |
e0001a05 NC |
9950 | { |
9951 | subseg_map *subseg_e; | |
9952 | ||
9953 | for (subseg_e = sseg_map; subseg_e; subseg_e = subseg_e->next) | |
e0001a05 | 9954 | { |
43cd72b9 | 9955 | if (seg == subseg_e->seg && subseg == subseg_e->subseg) |
b08b5071 | 9956 | break; |
e0001a05 | 9957 | } |
b08b5071 BW |
9958 | return subseg_e; |
9959 | } | |
9960 | ||
9961 | ||
9962 | static subseg_map * | |
9963 | add_subseg_info (segT seg, subsegT subseg) | |
9964 | { | |
9965 | subseg_map *subseg_e = (subseg_map *) xmalloc (sizeof (subseg_map)); | |
43cd72b9 BW |
9966 | memset (subseg_e, 0, sizeof (subseg_map)); |
9967 | subseg_e->seg = seg; | |
9968 | subseg_e->subseg = subseg; | |
9969 | subseg_e->flags = 0; | |
9970 | /* Start off considering every branch target very important. */ | |
b08b5071 BW |
9971 | subseg_e->target_freq = 1.0; |
9972 | subseg_e->total_freq = 1.0; | |
43cd72b9 BW |
9973 | subseg_e->next = sseg_map; |
9974 | sseg_map = subseg_e; | |
43cd72b9 BW |
9975 | return subseg_e; |
9976 | } | |
e0001a05 | 9977 | |
7fa3d080 BW |
9978 | |
9979 | static unsigned | |
9980 | get_last_insn_flags (segT seg, subsegT subseg) | |
9981 | { | |
9982 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
b08b5071 BW |
9983 | if (subseg_e) |
9984 | return subseg_e->flags; | |
9985 | return 0; | |
7fa3d080 BW |
9986 | } |
9987 | ||
9988 | ||
43cd72b9 | 9989 | static void |
7fa3d080 BW |
9990 | set_last_insn_flags (segT seg, |
9991 | subsegT subseg, | |
9992 | unsigned fl, | |
9993 | bfd_boolean val) | |
43cd72b9 BW |
9994 | { |
9995 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
b08b5071 BW |
9996 | if (! subseg_e) |
9997 | subseg_e = add_subseg_info (seg, subseg); | |
e0001a05 NC |
9998 | if (val) |
9999 | subseg_e->flags |= fl; | |
10000 | else | |
10001 | subseg_e->flags &= ~fl; | |
10002 | } | |
10003 | ||
b08b5071 BW |
10004 | |
10005 | static float | |
10006 | get_subseg_total_freq (segT seg, subsegT subseg) | |
10007 | { | |
10008 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
10009 | if (subseg_e) | |
10010 | return subseg_e->total_freq; | |
10011 | return 1.0; | |
10012 | } | |
10013 | ||
10014 | ||
10015 | static float | |
10016 | get_subseg_target_freq (segT seg, subsegT subseg) | |
10017 | { | |
10018 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
10019 | if (subseg_e) | |
10020 | return subseg_e->target_freq; | |
10021 | return 1.0; | |
10022 | } | |
10023 | ||
10024 | ||
10025 | static void | |
10026 | set_subseg_freq (segT seg, subsegT subseg, float total_f, float target_f) | |
10027 | { | |
10028 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
10029 | if (! subseg_e) | |
10030 | subseg_e = add_subseg_info (seg, subseg); | |
10031 | subseg_e->total_freq = total_f; | |
10032 | subseg_e->target_freq = target_f; | |
10033 | } | |
10034 | ||
e0001a05 NC |
10035 | \f |
10036 | /* Segment Lists and emit_state Stuff. */ | |
10037 | ||
e0001a05 | 10038 | static void |
7fa3d080 | 10039 | xtensa_move_seg_list_to_beginning (seg_list *head) |
e0001a05 NC |
10040 | { |
10041 | head = head->next; | |
10042 | while (head) | |
10043 | { | |
10044 | segT literal_section = head->seg; | |
10045 | ||
10046 | /* Move the literal section to the front of the section list. */ | |
9c2799c2 | 10047 | gas_assert (literal_section); |
69852798 AM |
10048 | if (literal_section != stdoutput->sections) |
10049 | { | |
10050 | bfd_section_list_remove (stdoutput, literal_section); | |
10051 | bfd_section_list_prepend (stdoutput, literal_section); | |
10052 | } | |
e0001a05 NC |
10053 | head = head->next; |
10054 | } | |
10055 | } | |
10056 | ||
10057 | ||
7fa3d080 BW |
10058 | static void mark_literal_frags (seg_list *); |
10059 | ||
10060 | static void | |
10061 | xtensa_move_literals (void) | |
e0001a05 NC |
10062 | { |
10063 | seg_list *segment; | |
10064 | frchainS *frchain_from, *frchain_to; | |
10065 | fragS *search_frag, *next_frag, *last_frag, *literal_pool, *insert_after; | |
10066 | fragS **frag_splice; | |
10067 | emit_state state; | |
10068 | segT dest_seg; | |
10069 | fixS *fix, *next_fix, **fix_splice; | |
82e7541d | 10070 | sym_list *lit; |
e0001a05 | 10071 | |
a7877748 | 10072 | mark_literal_frags (literal_head->next); |
e0001a05 NC |
10073 | |
10074 | if (use_literal_section) | |
10075 | return; | |
10076 | ||
74869ac7 | 10077 | for (segment = literal_head->next; segment; segment = segment->next) |
e0001a05 | 10078 | { |
74869ac7 BW |
10079 | /* Keep the literals for .init and .fini in separate sections. */ |
10080 | if (!strcmp (segment_name (segment->seg), INIT_SECTION_NAME) | |
10081 | || !strcmp (segment_name (segment->seg), FINI_SECTION_NAME)) | |
10082 | continue; | |
10083 | ||
e0001a05 NC |
10084 | frchain_from = seg_info (segment->seg)->frchainP; |
10085 | search_frag = frchain_from->frch_root; | |
10086 | literal_pool = NULL; | |
10087 | frchain_to = NULL; | |
10088 | frag_splice = &(frchain_from->frch_root); | |
10089 | ||
10090 | while (!search_frag->tc_frag_data.literal_frag) | |
10091 | { | |
9c2799c2 | 10092 | gas_assert (search_frag->fr_fix == 0 |
e0001a05 NC |
10093 | || search_frag->fr_type == rs_align); |
10094 | search_frag = search_frag->fr_next; | |
10095 | } | |
10096 | ||
9c2799c2 | 10097 | gas_assert (search_frag->tc_frag_data.literal_frag->fr_subtype |
e0001a05 NC |
10098 | == RELAX_LITERAL_POOL_BEGIN); |
10099 | xtensa_switch_section_emit_state (&state, segment->seg, 0); | |
10100 | ||
10101 | /* Make sure that all the frags in this series are closed, and | |
10102 | that there is at least one left over of zero-size. This | |
10103 | prevents us from making a segment with an frchain without any | |
10104 | frags in it. */ | |
10105 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 10106 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
10107 | last_frag = frag_now; |
10108 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 10109 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 10110 | |
43cd72b9 | 10111 | while (search_frag != frag_now) |
e0001a05 NC |
10112 | { |
10113 | next_frag = search_frag->fr_next; | |
10114 | ||
43cd72b9 | 10115 | /* First, move the frag out of the literal section and |
e0001a05 NC |
10116 | to the appropriate place. */ |
10117 | if (search_frag->tc_frag_data.literal_frag) | |
10118 | { | |
10119 | literal_pool = search_frag->tc_frag_data.literal_frag; | |
9c2799c2 | 10120 | gas_assert (literal_pool->fr_subtype == RELAX_LITERAL_POOL_BEGIN); |
dd49a749 | 10121 | frchain_to = literal_pool->tc_frag_data.lit_frchain; |
9c2799c2 | 10122 | gas_assert (frchain_to); |
e0001a05 | 10123 | } |
c48aaca0 | 10124 | insert_after = literal_pool->tc_frag_data.literal_frag; |
dd49a749 | 10125 | dest_seg = insert_after->fr_next->tc_frag_data.lit_seg; |
43cd72b9 | 10126 | |
e0001a05 NC |
10127 | *frag_splice = next_frag; |
10128 | search_frag->fr_next = insert_after->fr_next; | |
10129 | insert_after->fr_next = search_frag; | |
10130 | search_frag->tc_frag_data.lit_seg = dest_seg; | |
c48aaca0 | 10131 | literal_pool->tc_frag_data.literal_frag = search_frag; |
e0001a05 NC |
10132 | |
10133 | /* Now move any fixups associated with this frag to the | |
10134 | right section. */ | |
10135 | fix = frchain_from->fix_root; | |
10136 | fix_splice = &(frchain_from->fix_root); | |
10137 | while (fix) | |
10138 | { | |
10139 | next_fix = fix->fx_next; | |
10140 | if (fix->fx_frag == search_frag) | |
10141 | { | |
10142 | *fix_splice = next_fix; | |
10143 | fix->fx_next = frchain_to->fix_root; | |
10144 | frchain_to->fix_root = fix; | |
10145 | if (frchain_to->fix_tail == NULL) | |
10146 | frchain_to->fix_tail = fix; | |
10147 | } | |
10148 | else | |
10149 | fix_splice = &(fix->fx_next); | |
10150 | fix = next_fix; | |
10151 | } | |
10152 | search_frag = next_frag; | |
10153 | } | |
10154 | ||
10155 | if (frchain_from->fix_root != NULL) | |
10156 | { | |
10157 | frchain_from = seg_info (segment->seg)->frchainP; | |
10158 | as_warn (_("fixes not all moved from %s"), segment->seg->name); | |
10159 | ||
9c2799c2 | 10160 | gas_assert (frchain_from->fix_root == NULL); |
e0001a05 NC |
10161 | } |
10162 | frchain_from->fix_tail = NULL; | |
10163 | xtensa_restore_emit_state (&state); | |
e0001a05 NC |
10164 | } |
10165 | ||
82e7541d BW |
10166 | /* Now fix up the SEGMENT value for all the literal symbols. */ |
10167 | for (lit = literal_syms; lit; lit = lit->next) | |
10168 | { | |
10169 | symbolS *lit_sym = lit->sym; | |
10170 | segT dest_seg = symbol_get_frag (lit_sym)->tc_frag_data.lit_seg; | |
43cd72b9 BW |
10171 | if (dest_seg) |
10172 | S_SET_SEGMENT (lit_sym, dest_seg); | |
82e7541d | 10173 | } |
e0001a05 NC |
10174 | } |
10175 | ||
10176 | ||
a7877748 BW |
10177 | /* Walk over all the frags for segments in a list and mark them as |
10178 | containing literals. As clunky as this is, we can't rely on frag_var | |
10179 | and frag_variant to get called in all situations. */ | |
10180 | ||
10181 | static void | |
7fa3d080 | 10182 | mark_literal_frags (seg_list *segment) |
a7877748 BW |
10183 | { |
10184 | frchainS *frchain_from; | |
10185 | fragS *search_frag; | |
10186 | ||
10187 | while (segment) | |
10188 | { | |
10189 | frchain_from = seg_info (segment->seg)->frchainP; | |
10190 | search_frag = frchain_from->frch_root; | |
c138bc38 | 10191 | while (search_frag) |
a7877748 BW |
10192 | { |
10193 | search_frag->tc_frag_data.is_literal = TRUE; | |
10194 | search_frag = search_frag->fr_next; | |
10195 | } | |
10196 | segment = segment->next; | |
10197 | } | |
10198 | } | |
10199 | ||
10200 | ||
e0001a05 | 10201 | static void |
7fa3d080 | 10202 | xtensa_reorder_seg_list (seg_list *head, segT after) |
e0001a05 NC |
10203 | { |
10204 | /* Move all of the sections in the section list to come | |
10205 | after "after" in the gnu segment list. */ | |
10206 | ||
10207 | head = head->next; | |
10208 | while (head) | |
10209 | { | |
10210 | segT literal_section = head->seg; | |
10211 | ||
10212 | /* Move the literal section after "after". */ | |
9c2799c2 | 10213 | gas_assert (literal_section); |
e0001a05 NC |
10214 | if (literal_section != after) |
10215 | { | |
69852798 AM |
10216 | bfd_section_list_remove (stdoutput, literal_section); |
10217 | bfd_section_list_insert_after (stdoutput, after, literal_section); | |
e0001a05 NC |
10218 | } |
10219 | ||
10220 | head = head->next; | |
10221 | } | |
10222 | } | |
10223 | ||
10224 | ||
10225 | /* Push all the literal segments to the end of the gnu list. */ | |
10226 | ||
7fa3d080 BW |
10227 | static void |
10228 | xtensa_reorder_segments (void) | |
e0001a05 NC |
10229 | { |
10230 | segT sec; | |
b08b5071 | 10231 | segT last_sec = 0; |
e0001a05 NC |
10232 | int old_count = 0; |
10233 | int new_count = 0; | |
10234 | ||
10235 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) | |
b08b5071 BW |
10236 | { |
10237 | last_sec = sec; | |
10238 | old_count++; | |
10239 | } | |
e0001a05 NC |
10240 | |
10241 | /* Now that we have the last section, push all the literal | |
10242 | sections to the end. */ | |
e0001a05 | 10243 | xtensa_reorder_seg_list (literal_head, last_sec); |
e0001a05 NC |
10244 | |
10245 | /* Now perform the final error check. */ | |
10246 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) | |
10247 | new_count++; | |
9c2799c2 | 10248 | gas_assert (new_count == old_count); |
e0001a05 NC |
10249 | } |
10250 | ||
10251 | ||
e0001a05 NC |
10252 | /* Change the emit state (seg, subseg, and frag related stuff) to the |
10253 | correct location. Return a emit_state which can be passed to | |
10254 | xtensa_restore_emit_state to return to current fragment. */ | |
10255 | ||
7fa3d080 BW |
10256 | static void |
10257 | xtensa_switch_to_literal_fragment (emit_state *result) | |
43cd72b9 BW |
10258 | { |
10259 | if (directive_state[directive_absolute_literals]) | |
10260 | { | |
74869ac7 BW |
10261 | segT lit4_seg = cache_literal_section (TRUE); |
10262 | xtensa_switch_section_emit_state (result, lit4_seg, 0); | |
43cd72b9 BW |
10263 | } |
10264 | else | |
10265 | xtensa_switch_to_non_abs_literal_fragment (result); | |
10266 | ||
10267 | /* Do a 4-byte align here. */ | |
10268 | frag_align (2, 0, 0); | |
10269 | record_alignment (now_seg, 2); | |
10270 | } | |
10271 | ||
10272 | ||
7fa3d080 BW |
10273 | static void |
10274 | xtensa_switch_to_non_abs_literal_fragment (emit_state *result) | |
e0001a05 | 10275 | { |
e0001a05 NC |
10276 | static bfd_boolean recursive = FALSE; |
10277 | fragS *pool_location = get_literal_pool_location (now_seg); | |
74869ac7 | 10278 | segT lit_seg; |
c138bc38 | 10279 | bfd_boolean is_init = |
e0001a05 | 10280 | (now_seg && !strcmp (segment_name (now_seg), INIT_SECTION_NAME)); |
c138bc38 | 10281 | bfd_boolean is_fini = |
e0001a05 | 10282 | (now_seg && !strcmp (segment_name (now_seg), FINI_SECTION_NAME)); |
e0001a05 | 10283 | |
43cd72b9 BW |
10284 | if (pool_location == NULL |
10285 | && !use_literal_section | |
e0001a05 NC |
10286 | && !recursive |
10287 | && !is_init && ! is_fini) | |
10288 | { | |
43cd72b9 | 10289 | as_bad (_("literal pool location required for text-section-literals; specify with .literal_position")); |
74869ac7 BW |
10290 | |
10291 | /* When we mark a literal pool location, we want to put a frag in | |
10292 | the literal pool that points to it. But to do that, we want to | |
10293 | switch_to_literal_fragment. But literal sections don't have | |
10294 | literal pools, so their location is always null, so we would | |
10295 | recurse forever. This is kind of hacky, but it works. */ | |
10296 | ||
e0001a05 | 10297 | recursive = TRUE; |
61846f28 | 10298 | xtensa_mark_literal_pool_location (); |
e0001a05 NC |
10299 | recursive = FALSE; |
10300 | } | |
10301 | ||
74869ac7 BW |
10302 | lit_seg = cache_literal_section (FALSE); |
10303 | xtensa_switch_section_emit_state (result, lit_seg, 0); | |
e0001a05 | 10304 | |
43cd72b9 BW |
10305 | if (!use_literal_section |
10306 | && !is_init && !is_fini | |
10307 | && get_literal_pool_location (now_seg) != pool_location) | |
e0001a05 NC |
10308 | { |
10309 | /* Close whatever frag is there. */ | |
10310 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 10311 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
10312 | frag_now->tc_frag_data.literal_frag = pool_location; |
10313 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 10314 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 10315 | } |
e0001a05 NC |
10316 | } |
10317 | ||
10318 | ||
10319 | /* Call this function before emitting data into the literal section. | |
10320 | This is a helper function for xtensa_switch_to_literal_fragment. | |
10321 | This is similar to a .section new_now_seg subseg. */ | |
10322 | ||
7fa3d080 BW |
10323 | static void |
10324 | xtensa_switch_section_emit_state (emit_state *state, | |
10325 | segT new_now_seg, | |
10326 | subsegT new_now_subseg) | |
e0001a05 NC |
10327 | { |
10328 | state->name = now_seg->name; | |
10329 | state->now_seg = now_seg; | |
10330 | state->now_subseg = now_subseg; | |
10331 | state->generating_literals = generating_literals; | |
10332 | generating_literals++; | |
2b0210eb | 10333 | subseg_set (new_now_seg, new_now_subseg); |
e0001a05 NC |
10334 | } |
10335 | ||
10336 | ||
10337 | /* Use to restore the emitting into the normal place. */ | |
10338 | ||
7fa3d080 BW |
10339 | static void |
10340 | xtensa_restore_emit_state (emit_state *state) | |
e0001a05 NC |
10341 | { |
10342 | generating_literals = state->generating_literals; | |
2b0210eb | 10343 | subseg_set (state->now_seg, state->now_subseg); |
e0001a05 NC |
10344 | } |
10345 | ||
10346 | ||
74869ac7 | 10347 | /* Predicate function used to look up a section in a particular group. */ |
e0001a05 | 10348 | |
74869ac7 BW |
10349 | static bfd_boolean |
10350 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
e0001a05 | 10351 | { |
74869ac7 BW |
10352 | const char *gname = inf; |
10353 | const char *group_name = elf_group_name (sec); | |
10354 | ||
10355 | return (group_name == gname | |
10356 | || (group_name != NULL | |
10357 | && gname != NULL | |
10358 | && strcmp (group_name, gname) == 0)); | |
10359 | } | |
e0001a05 | 10360 | |
e0001a05 | 10361 | |
74869ac7 BW |
10362 | /* Get the literal section to be used for the current text section. |
10363 | The result may be cached in the default_lit_sections structure. */ | |
10364 | ||
10365 | static segT | |
10366 | cache_literal_section (bfd_boolean use_abs_literals) | |
10367 | { | |
10368 | const char *text_name, *group_name = 0; | |
10369 | char *base_name, *name, *suffix; | |
10370 | segT *pcached; | |
10371 | segT seg, current_section; | |
10372 | int current_subsec; | |
10373 | bfd_boolean linkonce = FALSE; | |
10374 | ||
10375 | /* Save the current section/subsection. */ | |
10376 | current_section = now_seg; | |
10377 | current_subsec = now_subseg; | |
10378 | ||
10379 | /* Clear the cached values if they are no longer valid. */ | |
10380 | if (now_seg != default_lit_sections.current_text_seg) | |
b08b5071 | 10381 | { |
74869ac7 BW |
10382 | default_lit_sections.current_text_seg = now_seg; |
10383 | default_lit_sections.lit_seg = NULL; | |
10384 | default_lit_sections.lit4_seg = NULL; | |
10385 | } | |
10386 | ||
10387 | /* Check if the literal section is already cached. */ | |
10388 | if (use_abs_literals) | |
10389 | pcached = &default_lit_sections.lit4_seg; | |
10390 | else | |
10391 | pcached = &default_lit_sections.lit_seg; | |
10392 | ||
10393 | if (*pcached) | |
10394 | return *pcached; | |
10395 | ||
10396 | text_name = default_lit_sections.lit_prefix; | |
10397 | if (! text_name || ! *text_name) | |
10398 | { | |
10399 | text_name = segment_name (current_section); | |
10400 | group_name = elf_group_name (current_section); | |
10401 | linkonce = (current_section->flags & SEC_LINK_ONCE) != 0; | |
10402 | } | |
10403 | ||
10404 | base_name = use_abs_literals ? ".lit4" : ".literal"; | |
10405 | if (group_name) | |
10406 | { | |
10407 | name = xmalloc (strlen (base_name) + strlen (group_name) + 2); | |
10408 | sprintf (name, "%s.%s", base_name, group_name); | |
10409 | } | |
10410 | else if (strncmp (text_name, ".gnu.linkonce.", linkonce_len) == 0) | |
10411 | { | |
10412 | suffix = strchr (text_name + linkonce_len, '.'); | |
10413 | ||
10414 | name = xmalloc (linkonce_len + strlen (base_name) + 1 | |
10415 | + (suffix ? strlen (suffix) : 0)); | |
10416 | strcpy (name, ".gnu.linkonce"); | |
10417 | strcat (name, base_name); | |
10418 | if (suffix) | |
10419 | strcat (name, suffix); | |
10420 | linkonce = TRUE; | |
10421 | } | |
10422 | else | |
10423 | { | |
10424 | /* If the section name ends with ".text", then replace that suffix | |
10425 | instead of appending an additional suffix. */ | |
10426 | size_t len = strlen (text_name); | |
10427 | if (len >= 5 && strcmp (text_name + len - 5, ".text") == 0) | |
10428 | len -= 5; | |
10429 | ||
10430 | name = xmalloc (len + strlen (base_name) + 1); | |
10431 | strcpy (name, text_name); | |
10432 | strcpy (name + len, base_name); | |
b08b5071 | 10433 | } |
e0001a05 | 10434 | |
74869ac7 BW |
10435 | /* Canonicalize section names to allow renaming literal sections. |
10436 | The group name, if any, came from the current text section and | |
10437 | has already been canonicalized. */ | |
10438 | name = tc_canonicalize_symbol_name (name); | |
10439 | ||
10440 | seg = bfd_get_section_by_name_if (stdoutput, name, match_section_group, | |
10441 | (void *) group_name); | |
10442 | if (! seg) | |
e0001a05 | 10443 | { |
74869ac7 BW |
10444 | flagword flags; |
10445 | ||
10446 | seg = subseg_force_new (name, 0); | |
10447 | ||
10448 | if (! use_abs_literals) | |
b08b5071 | 10449 | { |
74869ac7 | 10450 | /* Add the newly created literal segment to the list. */ |
b08b5071 BW |
10451 | seg_list *n = (seg_list *) xmalloc (sizeof (seg_list)); |
10452 | n->seg = seg; | |
74869ac7 BW |
10453 | n->next = literal_head->next; |
10454 | literal_head->next = n; | |
b08b5071 | 10455 | } |
74869ac7 BW |
10456 | |
10457 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_ALLOC | SEC_LOAD | |
10458 | | (linkonce ? (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD) : 0) | |
10459 | | (use_abs_literals ? SEC_DATA : SEC_CODE)); | |
10460 | ||
10461 | elf_group_name (seg) = group_name; | |
10462 | ||
10463 | bfd_set_section_flags (stdoutput, seg, flags); | |
b08b5071 | 10464 | bfd_set_section_alignment (stdoutput, seg, 2); |
e0001a05 NC |
10465 | } |
10466 | ||
74869ac7 | 10467 | *pcached = seg; |
b08b5071 | 10468 | subseg_set (current_section, current_subsec); |
74869ac7 | 10469 | return seg; |
e0001a05 NC |
10470 | } |
10471 | ||
43cd72b9 BW |
10472 | \f |
10473 | /* Property Tables Stuff. */ | |
10474 | ||
7fa3d080 BW |
10475 | #define XTENSA_INSN_SEC_NAME ".xt.insn" |
10476 | #define XTENSA_LIT_SEC_NAME ".xt.lit" | |
10477 | #define XTENSA_PROP_SEC_NAME ".xt.prop" | |
10478 | ||
10479 | typedef bfd_boolean (*frag_predicate) (const fragS *); | |
10480 | typedef void (*frag_flags_fn) (const fragS *, frag_flags *); | |
10481 | ||
b08b5071 | 10482 | static bfd_boolean get_frag_is_literal (const fragS *); |
7fa3d080 BW |
10483 | static void xtensa_create_property_segments |
10484 | (frag_predicate, frag_predicate, const char *, xt_section_type); | |
10485 | static void xtensa_create_xproperty_segments | |
10486 | (frag_flags_fn, const char *, xt_section_type); | |
532f93bd | 10487 | static bfd_boolean exclude_section_from_property_tables (segT); |
7fa3d080 BW |
10488 | static bfd_boolean section_has_property (segT, frag_predicate); |
10489 | static bfd_boolean section_has_xproperty (segT, frag_flags_fn); | |
10490 | static void add_xt_block_frags | |
542f8b94 | 10491 | (segT, xtensa_block_info **, frag_predicate, frag_predicate); |
7fa3d080 BW |
10492 | static bfd_boolean xtensa_frag_flags_is_empty (const frag_flags *); |
10493 | static void xtensa_frag_flags_init (frag_flags *); | |
10494 | static void get_frag_property_flags (const fragS *, frag_flags *); | |
2f1bf5c1 | 10495 | static flagword frag_flags_to_number (const frag_flags *); |
542f8b94 | 10496 | static void add_xt_prop_frags (segT, xtensa_block_info **, frag_flags_fn); |
7fa3d080 BW |
10497 | |
10498 | /* Set up property tables after relaxation. */ | |
10499 | ||
10500 | void | |
10501 | xtensa_post_relax_hook (void) | |
10502 | { | |
10503 | xtensa_move_seg_list_to_beginning (literal_head); | |
7fa3d080 BW |
10504 | |
10505 | xtensa_find_unmarked_state_frags (); | |
99ded152 | 10506 | xtensa_mark_frags_for_org (); |
6a7eedfe | 10507 | xtensa_mark_difference_of_two_symbols (); |
7fa3d080 | 10508 | |
b29757dc BW |
10509 | xtensa_create_property_segments (get_frag_is_literal, |
10510 | NULL, | |
10511 | XTENSA_LIT_SEC_NAME, | |
10512 | xt_literal_sec); | |
7fa3d080 BW |
10513 | xtensa_create_xproperty_segments (get_frag_property_flags, |
10514 | XTENSA_PROP_SEC_NAME, | |
10515 | xt_prop_sec); | |
10516 | ||
10517 | if (warn_unaligned_branch_targets) | |
10518 | bfd_map_over_sections (stdoutput, xtensa_find_unaligned_branch_targets, 0); | |
10519 | bfd_map_over_sections (stdoutput, xtensa_find_unaligned_loops, 0); | |
10520 | } | |
10521 | ||
10522 | ||
43cd72b9 BW |
10523 | /* This function is only meaningful after xtensa_move_literals. */ |
10524 | ||
10525 | static bfd_boolean | |
7fa3d080 | 10526 | get_frag_is_literal (const fragS *fragP) |
43cd72b9 | 10527 | { |
9c2799c2 | 10528 | gas_assert (fragP != NULL); |
43cd72b9 BW |
10529 | return fragP->tc_frag_data.is_literal; |
10530 | } | |
10531 | ||
10532 | ||
43cd72b9 | 10533 | static void |
7fa3d080 BW |
10534 | xtensa_create_property_segments (frag_predicate property_function, |
10535 | frag_predicate end_property_function, | |
10536 | const char *section_name_base, | |
10537 | xt_section_type sec_type) | |
43cd72b9 BW |
10538 | { |
10539 | segT *seclist; | |
10540 | ||
10541 | /* Walk over all of the current segments. | |
10542 | Walk over each fragment | |
10543 | For each non-empty fragment, | |
10544 | Build a property record (append where possible). */ | |
10545 | ||
10546 | for (seclist = &stdoutput->sections; | |
10547 | seclist && *seclist; | |
10548 | seclist = &(*seclist)->next) | |
10549 | { | |
10550 | segT sec = *seclist; | |
43cd72b9 | 10551 | |
532f93bd | 10552 | if (exclude_section_from_property_tables (sec)) |
43cd72b9 BW |
10553 | continue; |
10554 | ||
10555 | if (section_has_property (sec, property_function)) | |
10556 | { | |
542f8b94 BW |
10557 | segment_info_type *xt_seg_info; |
10558 | xtensa_block_info **xt_blocks; | |
51c8ebc1 | 10559 | segT prop_sec = xtensa_make_property_section (sec, section_name_base); |
542f8b94 BW |
10560 | |
10561 | prop_sec->output_section = prop_sec; | |
10562 | subseg_set (prop_sec, 0); | |
10563 | xt_seg_info = seg_info (prop_sec); | |
10564 | xt_blocks = &xt_seg_info->tc_segment_info_data.blocks[sec_type]; | |
10565 | ||
43cd72b9 | 10566 | /* Walk over all of the frchains here and add new sections. */ |
542f8b94 | 10567 | add_xt_block_frags (sec, xt_blocks, property_function, |
43cd72b9 BW |
10568 | end_property_function); |
10569 | } | |
10570 | } | |
10571 | ||
10572 | /* Now we fill them out.... */ | |
10573 | ||
10574 | for (seclist = &stdoutput->sections; | |
10575 | seclist && *seclist; | |
10576 | seclist = &(*seclist)->next) | |
10577 | { | |
10578 | segment_info_type *seginfo; | |
10579 | xtensa_block_info *block; | |
10580 | segT sec = *seclist; | |
10581 | ||
10582 | seginfo = seg_info (sec); | |
10583 | block = seginfo->tc_segment_info_data.blocks[sec_type]; | |
10584 | ||
10585 | if (block) | |
10586 | { | |
10587 | xtensa_block_info *cur_block; | |
43cd72b9 | 10588 | int num_recs = 0; |
d77b99c9 | 10589 | bfd_size_type rec_size; |
43cd72b9 BW |
10590 | |
10591 | for (cur_block = block; cur_block; cur_block = cur_block->next) | |
10592 | num_recs++; | |
10593 | ||
10594 | rec_size = num_recs * 8; | |
10595 | bfd_set_section_size (stdoutput, sec, rec_size); | |
10596 | ||
43cd72b9 BW |
10597 | if (num_recs) |
10598 | { | |
43cd72b9 | 10599 | char *frag_data; |
542f8b94 | 10600 | int i; |
43cd72b9 | 10601 | |
542f8b94 BW |
10602 | subseg_set (sec, 0); |
10603 | frag_data = frag_more (rec_size); | |
43cd72b9 | 10604 | cur_block = block; |
43cd72b9 BW |
10605 | for (i = 0; i < num_recs; i++) |
10606 | { | |
542f8b94 | 10607 | fixS *fix; |
e0001a05 | 10608 | |
43cd72b9 | 10609 | /* Write the fixup. */ |
9c2799c2 | 10610 | gas_assert (cur_block); |
542f8b94 BW |
10611 | fix = fix_new (frag_now, i * 8, 4, |
10612 | section_symbol (cur_block->sec), | |
10613 | cur_block->offset, | |
10614 | FALSE, BFD_RELOC_32); | |
10615 | fix->fx_file = "<internal>"; | |
43cd72b9 | 10616 | fix->fx_line = 0; |
e0001a05 | 10617 | |
43cd72b9 | 10618 | /* Write the length. */ |
542f8b94 | 10619 | md_number_to_chars (&frag_data[4 + i * 8], |
43cd72b9 BW |
10620 | cur_block->size, 4); |
10621 | cur_block = cur_block->next; | |
10622 | } | |
542f8b94 BW |
10623 | frag_wane (frag_now); |
10624 | frag_new (0); | |
10625 | frag_wane (frag_now); | |
43cd72b9 BW |
10626 | } |
10627 | } | |
10628 | } | |
e0001a05 NC |
10629 | } |
10630 | ||
10631 | ||
7fa3d080 BW |
10632 | static void |
10633 | xtensa_create_xproperty_segments (frag_flags_fn flag_fn, | |
10634 | const char *section_name_base, | |
10635 | xt_section_type sec_type) | |
e0001a05 NC |
10636 | { |
10637 | segT *seclist; | |
10638 | ||
10639 | /* Walk over all of the current segments. | |
43cd72b9 BW |
10640 | Walk over each fragment. |
10641 | For each fragment that has instructions, | |
10642 | build an instruction record (append where possible). */ | |
e0001a05 NC |
10643 | |
10644 | for (seclist = &stdoutput->sections; | |
10645 | seclist && *seclist; | |
10646 | seclist = &(*seclist)->next) | |
10647 | { | |
10648 | segT sec = *seclist; | |
43cd72b9 | 10649 | |
532f93bd | 10650 | if (exclude_section_from_property_tables (sec)) |
43cd72b9 BW |
10651 | continue; |
10652 | ||
10653 | if (section_has_xproperty (sec, flag_fn)) | |
e0001a05 | 10654 | { |
542f8b94 BW |
10655 | segment_info_type *xt_seg_info; |
10656 | xtensa_block_info **xt_blocks; | |
51c8ebc1 | 10657 | segT prop_sec = xtensa_make_property_section (sec, section_name_base); |
542f8b94 BW |
10658 | |
10659 | prop_sec->output_section = prop_sec; | |
10660 | subseg_set (prop_sec, 0); | |
10661 | xt_seg_info = seg_info (prop_sec); | |
10662 | xt_blocks = &xt_seg_info->tc_segment_info_data.blocks[sec_type]; | |
10663 | ||
e0001a05 | 10664 | /* Walk over all of the frchains here and add new sections. */ |
542f8b94 | 10665 | add_xt_prop_frags (sec, xt_blocks, flag_fn); |
e0001a05 NC |
10666 | } |
10667 | } | |
10668 | ||
10669 | /* Now we fill them out.... */ | |
10670 | ||
10671 | for (seclist = &stdoutput->sections; | |
10672 | seclist && *seclist; | |
10673 | seclist = &(*seclist)->next) | |
10674 | { | |
10675 | segment_info_type *seginfo; | |
10676 | xtensa_block_info *block; | |
10677 | segT sec = *seclist; | |
43cd72b9 | 10678 | |
e0001a05 NC |
10679 | seginfo = seg_info (sec); |
10680 | block = seginfo->tc_segment_info_data.blocks[sec_type]; | |
10681 | ||
10682 | if (block) | |
10683 | { | |
10684 | xtensa_block_info *cur_block; | |
43cd72b9 | 10685 | int num_recs = 0; |
d77b99c9 | 10686 | bfd_size_type rec_size; |
e0001a05 NC |
10687 | |
10688 | for (cur_block = block; cur_block; cur_block = cur_block->next) | |
10689 | num_recs++; | |
10690 | ||
43cd72b9 | 10691 | rec_size = num_recs * (8 + 4); |
e0001a05 | 10692 | bfd_set_section_size (stdoutput, sec, rec_size); |
43cd72b9 BW |
10693 | /* elf_section_data (sec)->this_hdr.sh_entsize = 12; */ |
10694 | ||
e0001a05 NC |
10695 | if (num_recs) |
10696 | { | |
e0001a05 | 10697 | char *frag_data; |
542f8b94 | 10698 | int i; |
e0001a05 | 10699 | |
542f8b94 BW |
10700 | subseg_set (sec, 0); |
10701 | frag_data = frag_more (rec_size); | |
e0001a05 | 10702 | cur_block = block; |
e0001a05 NC |
10703 | for (i = 0; i < num_recs; i++) |
10704 | { | |
542f8b94 | 10705 | fixS *fix; |
e0001a05 NC |
10706 | |
10707 | /* Write the fixup. */ | |
9c2799c2 | 10708 | gas_assert (cur_block); |
542f8b94 BW |
10709 | fix = fix_new (frag_now, i * 12, 4, |
10710 | section_symbol (cur_block->sec), | |
10711 | cur_block->offset, | |
10712 | FALSE, BFD_RELOC_32); | |
10713 | fix->fx_file = "<internal>"; | |
e0001a05 NC |
10714 | fix->fx_line = 0; |
10715 | ||
10716 | /* Write the length. */ | |
542f8b94 | 10717 | md_number_to_chars (&frag_data[4 + i * 12], |
e0001a05 | 10718 | cur_block->size, 4); |
542f8b94 | 10719 | md_number_to_chars (&frag_data[8 + i * 12], |
43cd72b9 | 10720 | frag_flags_to_number (&cur_block->flags), |
2f1bf5c1 | 10721 | sizeof (flagword)); |
e0001a05 NC |
10722 | cur_block = cur_block->next; |
10723 | } | |
542f8b94 BW |
10724 | frag_wane (frag_now); |
10725 | frag_new (0); | |
10726 | frag_wane (frag_now); | |
e0001a05 NC |
10727 | } |
10728 | } | |
10729 | } | |
10730 | } | |
10731 | ||
10732 | ||
532f93bd BW |
10733 | static bfd_boolean |
10734 | exclude_section_from_property_tables (segT sec) | |
10735 | { | |
10736 | flagword flags = bfd_get_section_flags (stdoutput, sec); | |
10737 | ||
10738 | /* Sections that don't contribute to the memory footprint are excluded. */ | |
10739 | if ((flags & SEC_DEBUGGING) | |
10740 | || !(flags & SEC_ALLOC) | |
10741 | || (flags & SEC_MERGE)) | |
10742 | return TRUE; | |
10743 | ||
10744 | /* Linker cie and fde optimizations mess up property entries for | |
10745 | eh_frame sections, but there is nothing inside them relevant to | |
10746 | property tables anyway. */ | |
10747 | if (strcmp (sec->name, ".eh_frame") == 0) | |
10748 | return TRUE; | |
10749 | ||
10750 | return FALSE; | |
10751 | } | |
10752 | ||
10753 | ||
7fa3d080 BW |
10754 | static bfd_boolean |
10755 | section_has_property (segT sec, frag_predicate property_function) | |
e0001a05 NC |
10756 | { |
10757 | segment_info_type *seginfo = seg_info (sec); | |
10758 | fragS *fragP; | |
10759 | ||
10760 | if (seginfo && seginfo->frchainP) | |
10761 | { | |
10762 | for (fragP = seginfo->frchainP->frch_root; fragP; fragP = fragP->fr_next) | |
10763 | { | |
10764 | if (property_function (fragP) | |
10765 | && (fragP->fr_type != rs_fill || fragP->fr_fix != 0)) | |
10766 | return TRUE; | |
10767 | } | |
10768 | } | |
10769 | return FALSE; | |
10770 | } | |
10771 | ||
10772 | ||
7fa3d080 BW |
10773 | static bfd_boolean |
10774 | section_has_xproperty (segT sec, frag_flags_fn property_function) | |
43cd72b9 BW |
10775 | { |
10776 | segment_info_type *seginfo = seg_info (sec); | |
10777 | fragS *fragP; | |
10778 | ||
10779 | if (seginfo && seginfo->frchainP) | |
10780 | { | |
10781 | for (fragP = seginfo->frchainP->frch_root; fragP; fragP = fragP->fr_next) | |
10782 | { | |
10783 | frag_flags prop_flags; | |
10784 | property_function (fragP, &prop_flags); | |
10785 | if (!xtensa_frag_flags_is_empty (&prop_flags)) | |
10786 | return TRUE; | |
10787 | } | |
10788 | } | |
10789 | return FALSE; | |
10790 | } | |
10791 | ||
10792 | ||
e0001a05 NC |
10793 | /* Two types of block sections exist right now: literal and insns. */ |
10794 | ||
7fa3d080 BW |
10795 | static void |
10796 | add_xt_block_frags (segT sec, | |
7fa3d080 BW |
10797 | xtensa_block_info **xt_block, |
10798 | frag_predicate property_function, | |
10799 | frag_predicate end_property_function) | |
e0001a05 | 10800 | { |
e0001a05 NC |
10801 | fragS *fragP; |
10802 | ||
e0001a05 NC |
10803 | /* Build it if needed. */ |
10804 | while (*xt_block != NULL) | |
10805 | xt_block = &(*xt_block)->next; | |
10806 | /* We are either at NULL at the beginning or at the end. */ | |
10807 | ||
10808 | /* Walk through the frags. */ | |
542f8b94 | 10809 | if (seg_info (sec)->frchainP) |
e0001a05 | 10810 | { |
542f8b94 | 10811 | for (fragP = seg_info (sec)->frchainP->frch_root; |
e0001a05 NC |
10812 | fragP; |
10813 | fragP = fragP->fr_next) | |
10814 | { | |
10815 | if (property_function (fragP) | |
10816 | && (fragP->fr_type != rs_fill || fragP->fr_fix != 0)) | |
10817 | { | |
10818 | if (*xt_block != NULL) | |
10819 | { | |
10820 | if ((*xt_block)->offset + (*xt_block)->size | |
10821 | == fragP->fr_address) | |
10822 | (*xt_block)->size += fragP->fr_fix; | |
10823 | else | |
10824 | xt_block = &((*xt_block)->next); | |
10825 | } | |
10826 | if (*xt_block == NULL) | |
10827 | { | |
43cd72b9 BW |
10828 | xtensa_block_info *new_block = (xtensa_block_info *) |
10829 | xmalloc (sizeof (xtensa_block_info)); | |
10830 | new_block->sec = sec; | |
10831 | new_block->offset = fragP->fr_address; | |
10832 | new_block->size = fragP->fr_fix; | |
10833 | new_block->next = NULL; | |
10834 | xtensa_frag_flags_init (&new_block->flags); | |
10835 | *xt_block = new_block; | |
10836 | } | |
10837 | if (end_property_function | |
10838 | && end_property_function (fragP)) | |
10839 | { | |
10840 | xt_block = &((*xt_block)->next); | |
10841 | } | |
10842 | } | |
10843 | } | |
10844 | } | |
10845 | } | |
10846 | ||
10847 | ||
10848 | /* Break the encapsulation of add_xt_prop_frags here. */ | |
10849 | ||
7fa3d080 BW |
10850 | static bfd_boolean |
10851 | xtensa_frag_flags_is_empty (const frag_flags *prop_flags) | |
43cd72b9 BW |
10852 | { |
10853 | if (prop_flags->is_literal | |
10854 | || prop_flags->is_insn | |
10855 | || prop_flags->is_data | |
10856 | || prop_flags->is_unreachable) | |
10857 | return FALSE; | |
10858 | return TRUE; | |
10859 | } | |
10860 | ||
10861 | ||
7fa3d080 BW |
10862 | static void |
10863 | xtensa_frag_flags_init (frag_flags *prop_flags) | |
43cd72b9 BW |
10864 | { |
10865 | memset (prop_flags, 0, sizeof (frag_flags)); | |
10866 | } | |
10867 | ||
10868 | ||
7fa3d080 BW |
10869 | static void |
10870 | get_frag_property_flags (const fragS *fragP, frag_flags *prop_flags) | |
43cd72b9 BW |
10871 | { |
10872 | xtensa_frag_flags_init (prop_flags); | |
10873 | if (fragP->tc_frag_data.is_literal) | |
10874 | prop_flags->is_literal = TRUE; | |
99ded152 BW |
10875 | if (fragP->tc_frag_data.is_specific_opcode |
10876 | || fragP->tc_frag_data.is_no_transform) | |
1f7efbae BW |
10877 | { |
10878 | prop_flags->is_no_transform = TRUE; | |
10879 | if (xtensa_frag_flags_is_empty (prop_flags)) | |
10880 | prop_flags->is_data = TRUE; | |
10881 | } | |
43cd72b9 | 10882 | if (fragP->tc_frag_data.is_unreachable) |
7fa3d080 | 10883 | prop_flags->is_unreachable = TRUE; |
43cd72b9 BW |
10884 | else if (fragP->tc_frag_data.is_insn) |
10885 | { | |
10886 | prop_flags->is_insn = TRUE; | |
10887 | if (fragP->tc_frag_data.is_loop_target) | |
10888 | prop_flags->insn.is_loop_target = TRUE; | |
10889 | if (fragP->tc_frag_data.is_branch_target) | |
10890 | prop_flags->insn.is_branch_target = TRUE; | |
43cd72b9 BW |
10891 | if (fragP->tc_frag_data.is_no_density) |
10892 | prop_flags->insn.is_no_density = TRUE; | |
10893 | if (fragP->tc_frag_data.use_absolute_literals) | |
10894 | prop_flags->insn.is_abslit = TRUE; | |
10895 | } | |
10896 | if (fragP->tc_frag_data.is_align) | |
10897 | { | |
10898 | prop_flags->is_align = TRUE; | |
10899 | prop_flags->alignment = fragP->tc_frag_data.alignment; | |
10900 | if (xtensa_frag_flags_is_empty (prop_flags)) | |
10901 | prop_flags->is_data = TRUE; | |
10902 | } | |
10903 | } | |
10904 | ||
10905 | ||
2f1bf5c1 | 10906 | static flagword |
7fa3d080 | 10907 | frag_flags_to_number (const frag_flags *prop_flags) |
43cd72b9 | 10908 | { |
2f1bf5c1 | 10909 | flagword num = 0; |
43cd72b9 BW |
10910 | if (prop_flags->is_literal) |
10911 | num |= XTENSA_PROP_LITERAL; | |
10912 | if (prop_flags->is_insn) | |
10913 | num |= XTENSA_PROP_INSN; | |
10914 | if (prop_flags->is_data) | |
10915 | num |= XTENSA_PROP_DATA; | |
10916 | if (prop_flags->is_unreachable) | |
10917 | num |= XTENSA_PROP_UNREACHABLE; | |
10918 | if (prop_flags->insn.is_loop_target) | |
10919 | num |= XTENSA_PROP_INSN_LOOP_TARGET; | |
10920 | if (prop_flags->insn.is_branch_target) | |
10921 | { | |
10922 | num |= XTENSA_PROP_INSN_BRANCH_TARGET; | |
10923 | num = SET_XTENSA_PROP_BT_ALIGN (num, prop_flags->insn.bt_align_priority); | |
10924 | } | |
10925 | ||
10926 | if (prop_flags->insn.is_no_density) | |
10927 | num |= XTENSA_PROP_INSN_NO_DENSITY; | |
99ded152 BW |
10928 | if (prop_flags->is_no_transform) |
10929 | num |= XTENSA_PROP_NO_TRANSFORM; | |
43cd72b9 BW |
10930 | if (prop_flags->insn.is_no_reorder) |
10931 | num |= XTENSA_PROP_INSN_NO_REORDER; | |
10932 | if (prop_flags->insn.is_abslit) | |
10933 | num |= XTENSA_PROP_INSN_ABSLIT; | |
10934 | ||
10935 | if (prop_flags->is_align) | |
10936 | { | |
10937 | num |= XTENSA_PROP_ALIGN; | |
10938 | num = SET_XTENSA_PROP_ALIGNMENT (num, prop_flags->alignment); | |
10939 | } | |
10940 | ||
10941 | return num; | |
10942 | } | |
10943 | ||
10944 | ||
10945 | static bfd_boolean | |
7fa3d080 BW |
10946 | xtensa_frag_flags_combinable (const frag_flags *prop_flags_1, |
10947 | const frag_flags *prop_flags_2) | |
43cd72b9 BW |
10948 | { |
10949 | /* Cannot combine with an end marker. */ | |
10950 | ||
10951 | if (prop_flags_1->is_literal != prop_flags_2->is_literal) | |
10952 | return FALSE; | |
10953 | if (prop_flags_1->is_insn != prop_flags_2->is_insn) | |
10954 | return FALSE; | |
10955 | if (prop_flags_1->is_data != prop_flags_2->is_data) | |
10956 | return FALSE; | |
10957 | ||
10958 | if (prop_flags_1->is_insn) | |
10959 | { | |
10960 | /* Properties of the beginning of the frag. */ | |
10961 | if (prop_flags_2->insn.is_loop_target) | |
10962 | return FALSE; | |
10963 | if (prop_flags_2->insn.is_branch_target) | |
10964 | return FALSE; | |
10965 | if (prop_flags_1->insn.is_no_density != | |
10966 | prop_flags_2->insn.is_no_density) | |
10967 | return FALSE; | |
99ded152 BW |
10968 | if (prop_flags_1->is_no_transform != |
10969 | prop_flags_2->is_no_transform) | |
43cd72b9 BW |
10970 | return FALSE; |
10971 | if (prop_flags_1->insn.is_no_reorder != | |
10972 | prop_flags_2->insn.is_no_reorder) | |
10973 | return FALSE; | |
10974 | if (prop_flags_1->insn.is_abslit != | |
10975 | prop_flags_2->insn.is_abslit) | |
10976 | return FALSE; | |
10977 | } | |
10978 | ||
10979 | if (prop_flags_1->is_align) | |
10980 | return FALSE; | |
10981 | ||
10982 | return TRUE; | |
10983 | } | |
10984 | ||
10985 | ||
7fa3d080 BW |
10986 | static bfd_vma |
10987 | xt_block_aligned_size (const xtensa_block_info *xt_block) | |
43cd72b9 BW |
10988 | { |
10989 | bfd_vma end_addr; | |
d77b99c9 | 10990 | unsigned align_bits; |
43cd72b9 BW |
10991 | |
10992 | if (!xt_block->flags.is_align) | |
10993 | return xt_block->size; | |
10994 | ||
10995 | end_addr = xt_block->offset + xt_block->size; | |
10996 | align_bits = xt_block->flags.alignment; | |
10997 | end_addr = ((end_addr + ((1 << align_bits) -1)) >> align_bits) << align_bits; | |
10998 | return end_addr - xt_block->offset; | |
10999 | } | |
11000 | ||
11001 | ||
11002 | static bfd_boolean | |
7fa3d080 BW |
11003 | xtensa_xt_block_combine (xtensa_block_info *xt_block, |
11004 | const xtensa_block_info *xt_block_2) | |
43cd72b9 BW |
11005 | { |
11006 | if (xt_block->sec != xt_block_2->sec) | |
11007 | return FALSE; | |
11008 | if (xt_block->offset + xt_block_aligned_size (xt_block) | |
11009 | != xt_block_2->offset) | |
11010 | return FALSE; | |
11011 | ||
11012 | if (xt_block_2->size == 0 | |
11013 | && (!xt_block_2->flags.is_unreachable | |
11014 | || xt_block->flags.is_unreachable)) | |
11015 | { | |
11016 | if (xt_block_2->flags.is_align | |
11017 | && xt_block->flags.is_align) | |
11018 | { | |
11019 | /* Nothing needed. */ | |
11020 | if (xt_block->flags.alignment >= xt_block_2->flags.alignment) | |
11021 | return TRUE; | |
11022 | } | |
11023 | else | |
11024 | { | |
11025 | if (xt_block_2->flags.is_align) | |
11026 | { | |
11027 | /* Push alignment to previous entry. */ | |
11028 | xt_block->flags.is_align = xt_block_2->flags.is_align; | |
11029 | xt_block->flags.alignment = xt_block_2->flags.alignment; | |
11030 | } | |
11031 | return TRUE; | |
11032 | } | |
11033 | } | |
11034 | if (!xtensa_frag_flags_combinable (&xt_block->flags, | |
11035 | &xt_block_2->flags)) | |
11036 | return FALSE; | |
11037 | ||
11038 | xt_block->size += xt_block_2->size; | |
11039 | ||
11040 | if (xt_block_2->flags.is_align) | |
11041 | { | |
11042 | xt_block->flags.is_align = TRUE; | |
11043 | xt_block->flags.alignment = xt_block_2->flags.alignment; | |
11044 | } | |
11045 | ||
11046 | return TRUE; | |
11047 | } | |
11048 | ||
11049 | ||
7fa3d080 BW |
11050 | static void |
11051 | add_xt_prop_frags (segT sec, | |
7fa3d080 BW |
11052 | xtensa_block_info **xt_block, |
11053 | frag_flags_fn property_function) | |
43cd72b9 | 11054 | { |
43cd72b9 BW |
11055 | fragS *fragP; |
11056 | ||
43cd72b9 BW |
11057 | /* Build it if needed. */ |
11058 | while (*xt_block != NULL) | |
11059 | { | |
11060 | xt_block = &(*xt_block)->next; | |
11061 | } | |
11062 | /* We are either at NULL at the beginning or at the end. */ | |
11063 | ||
11064 | /* Walk through the frags. */ | |
542f8b94 | 11065 | if (seg_info (sec)->frchainP) |
43cd72b9 | 11066 | { |
542f8b94 | 11067 | for (fragP = seg_info (sec)->frchainP->frch_root; fragP; |
43cd72b9 BW |
11068 | fragP = fragP->fr_next) |
11069 | { | |
11070 | xtensa_block_info tmp_block; | |
11071 | tmp_block.sec = sec; | |
11072 | tmp_block.offset = fragP->fr_address; | |
11073 | tmp_block.size = fragP->fr_fix; | |
11074 | tmp_block.next = NULL; | |
11075 | property_function (fragP, &tmp_block.flags); | |
11076 | ||
11077 | if (!xtensa_frag_flags_is_empty (&tmp_block.flags)) | |
11078 | /* && fragP->fr_fix != 0) */ | |
11079 | { | |
11080 | if ((*xt_block) == NULL | |
11081 | || !xtensa_xt_block_combine (*xt_block, &tmp_block)) | |
11082 | { | |
11083 | xtensa_block_info *new_block; | |
11084 | if ((*xt_block) != NULL) | |
11085 | xt_block = &(*xt_block)->next; | |
11086 | new_block = (xtensa_block_info *) | |
11087 | xmalloc (sizeof (xtensa_block_info)); | |
11088 | *new_block = tmp_block; | |
11089 | *xt_block = new_block; | |
11090 | } | |
11091 | } | |
11092 | } | |
11093 | } | |
11094 | } | |
11095 | ||
11096 | \f | |
11097 | /* op_placement_info_table */ | |
11098 | ||
11099 | /* op_placement_info makes it easier to determine which | |
11100 | ops can go in which slots. */ | |
11101 | ||
11102 | static void | |
7fa3d080 | 11103 | init_op_placement_info_table (void) |
43cd72b9 BW |
11104 | { |
11105 | xtensa_isa isa = xtensa_default_isa; | |
11106 | xtensa_insnbuf ibuf = xtensa_insnbuf_alloc (isa); | |
11107 | xtensa_opcode opcode; | |
11108 | xtensa_format fmt; | |
11109 | int slot; | |
11110 | int num_opcodes = xtensa_isa_num_opcodes (isa); | |
11111 | ||
11112 | op_placement_table = (op_placement_info_table) | |
11113 | xmalloc (sizeof (op_placement_info) * num_opcodes); | |
9c2799c2 | 11114 | gas_assert (xtensa_isa_num_formats (isa) < MAX_FORMATS); |
43cd72b9 BW |
11115 | |
11116 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
11117 | { | |
11118 | op_placement_info *opi = &op_placement_table[opcode]; | |
11119 | /* FIXME: Make tinsn allocation dynamic. */ | |
51add5c3 | 11120 | if (xtensa_opcode_num_operands (isa, opcode) > MAX_INSN_ARGS) |
43cd72b9 | 11121 | as_fatal (_("too many operands in instruction")); |
43cd72b9 BW |
11122 | opi->narrowest = XTENSA_UNDEFINED; |
11123 | opi->narrowest_size = 0x7F; | |
b2d179be | 11124 | opi->narrowest_slot = 0; |
43cd72b9 BW |
11125 | opi->formats = 0; |
11126 | opi->num_formats = 0; | |
11127 | opi->issuef = 0; | |
11128 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
11129 | { | |
11130 | opi->slots[fmt] = 0; | |
11131 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
11132 | { | |
11133 | if (xtensa_opcode_encode (isa, fmt, slot, ibuf, opcode) == 0) | |
11134 | { | |
11135 | int fmt_length = xtensa_format_length (isa, fmt); | |
11136 | opi->issuef++; | |
11137 | set_bit (fmt, opi->formats); | |
11138 | set_bit (slot, opi->slots[fmt]); | |
a02728c8 BW |
11139 | if (fmt_length < opi->narrowest_size |
11140 | || (fmt_length == opi->narrowest_size | |
11141 | && (xtensa_format_num_slots (isa, fmt) | |
11142 | < xtensa_format_num_slots (isa, | |
11143 | opi->narrowest)))) | |
43cd72b9 BW |
11144 | { |
11145 | opi->narrowest = fmt; | |
11146 | opi->narrowest_size = fmt_length; | |
b2d179be | 11147 | opi->narrowest_slot = slot; |
43cd72b9 | 11148 | } |
e0001a05 NC |
11149 | } |
11150 | } | |
43cd72b9 BW |
11151 | if (opi->formats) |
11152 | opi->num_formats++; | |
e0001a05 NC |
11153 | } |
11154 | } | |
43cd72b9 BW |
11155 | xtensa_insnbuf_free (isa, ibuf); |
11156 | } | |
11157 | ||
11158 | ||
11159 | bfd_boolean | |
7fa3d080 | 11160 | opcode_fits_format_slot (xtensa_opcode opcode, xtensa_format fmt, int slot) |
43cd72b9 BW |
11161 | { |
11162 | return bit_is_set (slot, op_placement_table[opcode].slots[fmt]); | |
11163 | } | |
11164 | ||
11165 | ||
11166 | /* If the opcode is available in a single slot format, return its size. */ | |
11167 | ||
7fa3d080 BW |
11168 | static int |
11169 | xg_get_single_size (xtensa_opcode opcode) | |
43cd72b9 | 11170 | { |
b2d179be | 11171 | return op_placement_table[opcode].narrowest_size; |
43cd72b9 BW |
11172 | } |
11173 | ||
11174 | ||
7fa3d080 BW |
11175 | static xtensa_format |
11176 | xg_get_single_format (xtensa_opcode opcode) | |
43cd72b9 | 11177 | { |
b2d179be BW |
11178 | return op_placement_table[opcode].narrowest; |
11179 | } | |
11180 | ||
11181 | ||
11182 | static int | |
11183 | xg_get_single_slot (xtensa_opcode opcode) | |
11184 | { | |
11185 | return op_placement_table[opcode].narrowest_slot; | |
e0001a05 NC |
11186 | } |
11187 | ||
11188 | \f | |
11189 | /* Instruction Stack Functions (from "xtensa-istack.h"). */ | |
11190 | ||
11191 | void | |
7fa3d080 | 11192 | istack_init (IStack *stack) |
e0001a05 NC |
11193 | { |
11194 | memset (stack, 0, sizeof (IStack)); | |
11195 | stack->ninsn = 0; | |
11196 | } | |
11197 | ||
11198 | ||
11199 | bfd_boolean | |
7fa3d080 | 11200 | istack_empty (IStack *stack) |
e0001a05 NC |
11201 | { |
11202 | return (stack->ninsn == 0); | |
11203 | } | |
11204 | ||
11205 | ||
11206 | bfd_boolean | |
7fa3d080 | 11207 | istack_full (IStack *stack) |
e0001a05 NC |
11208 | { |
11209 | return (stack->ninsn == MAX_ISTACK); | |
11210 | } | |
11211 | ||
11212 | ||
11213 | /* Return a pointer to the top IStack entry. | |
43cd72b9 | 11214 | It is an error to call this if istack_empty () is TRUE. */ |
e0001a05 NC |
11215 | |
11216 | TInsn * | |
7fa3d080 | 11217 | istack_top (IStack *stack) |
e0001a05 NC |
11218 | { |
11219 | int rec = stack->ninsn - 1; | |
9c2799c2 | 11220 | gas_assert (!istack_empty (stack)); |
e0001a05 NC |
11221 | return &stack->insn[rec]; |
11222 | } | |
11223 | ||
11224 | ||
11225 | /* Add a new TInsn to an IStack. | |
43cd72b9 | 11226 | It is an error to call this if istack_full () is TRUE. */ |
e0001a05 NC |
11227 | |
11228 | void | |
7fa3d080 | 11229 | istack_push (IStack *stack, TInsn *insn) |
e0001a05 NC |
11230 | { |
11231 | int rec = stack->ninsn; | |
9c2799c2 | 11232 | gas_assert (!istack_full (stack)); |
43cd72b9 | 11233 | stack->insn[rec] = *insn; |
e0001a05 NC |
11234 | stack->ninsn++; |
11235 | } | |
11236 | ||
11237 | ||
11238 | /* Clear space for the next TInsn on the IStack and return a pointer | |
43cd72b9 | 11239 | to it. It is an error to call this if istack_full () is TRUE. */ |
e0001a05 NC |
11240 | |
11241 | TInsn * | |
7fa3d080 | 11242 | istack_push_space (IStack *stack) |
e0001a05 NC |
11243 | { |
11244 | int rec = stack->ninsn; | |
11245 | TInsn *insn; | |
9c2799c2 | 11246 | gas_assert (!istack_full (stack)); |
e0001a05 | 11247 | insn = &stack->insn[rec]; |
60242db2 | 11248 | tinsn_init (insn); |
e0001a05 NC |
11249 | stack->ninsn++; |
11250 | return insn; | |
11251 | } | |
11252 | ||
11253 | ||
11254 | /* Remove the last pushed instruction. It is an error to call this if | |
43cd72b9 | 11255 | istack_empty () returns TRUE. */ |
e0001a05 NC |
11256 | |
11257 | void | |
7fa3d080 | 11258 | istack_pop (IStack *stack) |
e0001a05 NC |
11259 | { |
11260 | int rec = stack->ninsn - 1; | |
9c2799c2 | 11261 | gas_assert (!istack_empty (stack)); |
e0001a05 | 11262 | stack->ninsn--; |
60242db2 | 11263 | tinsn_init (&stack->insn[rec]); |
e0001a05 NC |
11264 | } |
11265 | ||
11266 | \f | |
11267 | /* TInsn functions. */ | |
11268 | ||
11269 | void | |
7fa3d080 | 11270 | tinsn_init (TInsn *dst) |
e0001a05 NC |
11271 | { |
11272 | memset (dst, 0, sizeof (TInsn)); | |
11273 | } | |
11274 | ||
11275 | ||
43cd72b9 | 11276 | /* Return TRUE if ANY of the operands in the insn are symbolic. */ |
e0001a05 NC |
11277 | |
11278 | static bfd_boolean | |
7fa3d080 | 11279 | tinsn_has_symbolic_operands (const TInsn *insn) |
e0001a05 NC |
11280 | { |
11281 | int i; | |
11282 | int n = insn->ntok; | |
11283 | ||
9c2799c2 | 11284 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
11285 | |
11286 | for (i = 0; i < n; ++i) | |
11287 | { | |
11288 | switch (insn->tok[i].X_op) | |
11289 | { | |
11290 | case O_register: | |
11291 | case O_constant: | |
11292 | break; | |
11293 | default: | |
11294 | return TRUE; | |
11295 | } | |
11296 | } | |
11297 | return FALSE; | |
11298 | } | |
11299 | ||
11300 | ||
11301 | bfd_boolean | |
7fa3d080 | 11302 | tinsn_has_invalid_symbolic_operands (const TInsn *insn) |
e0001a05 | 11303 | { |
43cd72b9 | 11304 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
11305 | int i; |
11306 | int n = insn->ntok; | |
11307 | ||
9c2799c2 | 11308 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
11309 | |
11310 | for (i = 0; i < n; ++i) | |
11311 | { | |
11312 | switch (insn->tok[i].X_op) | |
11313 | { | |
11314 | case O_register: | |
11315 | case O_constant: | |
11316 | break; | |
43cd72b9 BW |
11317 | case O_big: |
11318 | case O_illegal: | |
11319 | case O_absent: | |
11320 | /* Errors for these types are caught later. */ | |
11321 | break; | |
11322 | case O_hi16: | |
11323 | case O_lo16: | |
e0001a05 | 11324 | default: |
43cd72b9 BW |
11325 | /* Symbolic immediates are only allowed on the last immediate |
11326 | operand. At this time, CONST16 is the only opcode where we | |
e7da6241 | 11327 | support non-PC-relative relocations. */ |
43cd72b9 BW |
11328 | if (i != get_relaxable_immed (insn->opcode) |
11329 | || (xtensa_operand_is_PCrelative (isa, insn->opcode, i) != 1 | |
11330 | && insn->opcode != xtensa_const16_opcode)) | |
11331 | { | |
431ad2d0 | 11332 | as_bad (_("invalid symbolic operand")); |
43cd72b9 BW |
11333 | return TRUE; |
11334 | } | |
e0001a05 NC |
11335 | } |
11336 | } | |
11337 | return FALSE; | |
11338 | } | |
11339 | ||
11340 | ||
11341 | /* For assembly code with complex expressions (e.g. subtraction), | |
11342 | we have to build them in the literal pool so that | |
11343 | their results are calculated correctly after relaxation. | |
11344 | The relaxation only handles expressions that | |
11345 | boil down to SYMBOL + OFFSET. */ | |
11346 | ||
11347 | static bfd_boolean | |
7fa3d080 | 11348 | tinsn_has_complex_operands (const TInsn *insn) |
e0001a05 NC |
11349 | { |
11350 | int i; | |
11351 | int n = insn->ntok; | |
9c2799c2 | 11352 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
11353 | for (i = 0; i < n; ++i) |
11354 | { | |
11355 | switch (insn->tok[i].X_op) | |
11356 | { | |
11357 | case O_register: | |
11358 | case O_constant: | |
11359 | case O_symbol: | |
43cd72b9 BW |
11360 | case O_lo16: |
11361 | case O_hi16: | |
e0001a05 NC |
11362 | break; |
11363 | default: | |
11364 | return TRUE; | |
11365 | } | |
11366 | } | |
11367 | return FALSE; | |
11368 | } | |
11369 | ||
11370 | ||
b2d179be BW |
11371 | /* Encode a TInsn opcode and its constant operands into slotbuf. |
11372 | Return TRUE if there is a symbol in the immediate field. This | |
11373 | function assumes that: | |
11374 | 1) The number of operands are correct. | |
11375 | 2) The insn_type is ITYPE_INSN. | |
11376 | 3) The opcode can be encoded in the specified format and slot. | |
11377 | 4) Operands are either O_constant or O_symbol, and all constants fit. */ | |
43cd72b9 BW |
11378 | |
11379 | static bfd_boolean | |
7fa3d080 BW |
11380 | tinsn_to_slotbuf (xtensa_format fmt, |
11381 | int slot, | |
11382 | TInsn *tinsn, | |
11383 | xtensa_insnbuf slotbuf) | |
43cd72b9 BW |
11384 | { |
11385 | xtensa_isa isa = xtensa_default_isa; | |
11386 | xtensa_opcode opcode = tinsn->opcode; | |
11387 | bfd_boolean has_fixup = FALSE; | |
11388 | int noperands = xtensa_opcode_num_operands (isa, opcode); | |
11389 | int i; | |
11390 | ||
9c2799c2 | 11391 | gas_assert (tinsn->insn_type == ITYPE_INSN); |
43cd72b9 BW |
11392 | if (noperands != tinsn->ntok) |
11393 | as_fatal (_("operand number mismatch")); | |
11394 | ||
11395 | if (xtensa_opcode_encode (isa, fmt, slot, slotbuf, opcode)) | |
11396 | { | |
11397 | as_bad (_("cannot encode opcode \"%s\" in the given format \"%s\""), | |
11398 | xtensa_opcode_name (isa, opcode), xtensa_format_name (isa, fmt)); | |
11399 | return FALSE; | |
11400 | } | |
11401 | ||
11402 | for (i = 0; i < noperands; i++) | |
11403 | { | |
11404 | expressionS *expr = &tinsn->tok[i]; | |
d77b99c9 BW |
11405 | int rc; |
11406 | unsigned line; | |
43cd72b9 BW |
11407 | char *file_name; |
11408 | uint32 opnd_value; | |
11409 | ||
11410 | switch (expr->X_op) | |
11411 | { | |
11412 | case O_register: | |
11413 | if (xtensa_operand_is_visible (isa, opcode, i) == 0) | |
11414 | break; | |
11415 | /* The register number has already been checked in | |
11416 | expression_maybe_register, so we don't need to check here. */ | |
11417 | opnd_value = expr->X_add_number; | |
11418 | (void) xtensa_operand_encode (isa, opcode, i, &opnd_value); | |
11419 | rc = xtensa_operand_set_field (isa, opcode, i, fmt, slot, slotbuf, | |
11420 | opnd_value); | |
11421 | if (rc != 0) | |
11422 | as_warn (_("xtensa-isa failure: %s"), xtensa_isa_error_msg (isa)); | |
11423 | break; | |
11424 | ||
11425 | case O_constant: | |
11426 | if (xtensa_operand_is_visible (isa, opcode, i) == 0) | |
11427 | break; | |
11428 | as_where (&file_name, &line); | |
11429 | /* It is a constant and we called this function | |
11430 | then we have to try to fit it. */ | |
11431 | xtensa_insnbuf_set_operand (slotbuf, fmt, slot, opcode, i, | |
e0001a05 NC |
11432 | expr->X_add_number, file_name, line); |
11433 | break; | |
11434 | ||
e0001a05 NC |
11435 | default: |
11436 | has_fixup = TRUE; | |
11437 | break; | |
11438 | } | |
11439 | } | |
43cd72b9 | 11440 | |
e0001a05 NC |
11441 | return has_fixup; |
11442 | } | |
11443 | ||
11444 | ||
b2d179be BW |
11445 | /* Encode a single TInsn into an insnbuf. If the opcode can only be encoded |
11446 | into a multi-slot instruction, fill the other slots with NOPs. | |
11447 | Return TRUE if there is a symbol in the immediate field. See also the | |
11448 | assumptions listed for tinsn_to_slotbuf. */ | |
11449 | ||
11450 | static bfd_boolean | |
11451 | tinsn_to_insnbuf (TInsn *tinsn, xtensa_insnbuf insnbuf) | |
11452 | { | |
11453 | static xtensa_insnbuf slotbuf = 0; | |
11454 | static vliw_insn vinsn; | |
11455 | xtensa_isa isa = xtensa_default_isa; | |
11456 | bfd_boolean has_fixup = FALSE; | |
11457 | int i; | |
11458 | ||
11459 | if (!slotbuf) | |
11460 | { | |
11461 | slotbuf = xtensa_insnbuf_alloc (isa); | |
11462 | xg_init_vinsn (&vinsn); | |
11463 | } | |
11464 | ||
11465 | xg_clear_vinsn (&vinsn); | |
11466 | ||
11467 | bundle_tinsn (tinsn, &vinsn); | |
11468 | ||
11469 | xtensa_format_encode (isa, vinsn.format, insnbuf); | |
11470 | ||
11471 | for (i = 0; i < vinsn.num_slots; i++) | |
11472 | { | |
11473 | /* Only one slot may have a fix-up because the rest contains NOPs. */ | |
11474 | has_fixup |= | |
11475 | tinsn_to_slotbuf (vinsn.format, i, &vinsn.slots[i], vinsn.slotbuf[i]); | |
11476 | xtensa_format_set_slot (isa, vinsn.format, i, insnbuf, vinsn.slotbuf[i]); | |
11477 | } | |
11478 | ||
11479 | return has_fixup; | |
11480 | } | |
11481 | ||
11482 | ||
43cd72b9 | 11483 | /* Check the instruction arguments. Return TRUE on failure. */ |
e0001a05 | 11484 | |
7fa3d080 BW |
11485 | static bfd_boolean |
11486 | tinsn_check_arguments (const TInsn *insn) | |
e0001a05 NC |
11487 | { |
11488 | xtensa_isa isa = xtensa_default_isa; | |
11489 | xtensa_opcode opcode = insn->opcode; | |
6dc6b655 BW |
11490 | xtensa_regfile t1_regfile, t2_regfile; |
11491 | int t1_reg, t2_reg; | |
11492 | int t1_base_reg, t1_last_reg; | |
11493 | int t2_base_reg, t2_last_reg; | |
11494 | char t1_inout, t2_inout; | |
11495 | int i, j; | |
e0001a05 NC |
11496 | |
11497 | if (opcode == XTENSA_UNDEFINED) | |
11498 | { | |
11499 | as_bad (_("invalid opcode")); | |
11500 | return TRUE; | |
11501 | } | |
11502 | ||
43cd72b9 | 11503 | if (xtensa_opcode_num_operands (isa, opcode) > insn->ntok) |
e0001a05 NC |
11504 | { |
11505 | as_bad (_("too few operands")); | |
11506 | return TRUE; | |
11507 | } | |
11508 | ||
43cd72b9 | 11509 | if (xtensa_opcode_num_operands (isa, opcode) < insn->ntok) |
e0001a05 NC |
11510 | { |
11511 | as_bad (_("too many operands")); | |
11512 | return TRUE; | |
11513 | } | |
6dc6b655 BW |
11514 | |
11515 | /* Check registers. */ | |
11516 | for (j = 0; j < insn->ntok; j++) | |
11517 | { | |
11518 | if (xtensa_operand_is_register (isa, insn->opcode, j) != 1) | |
11519 | continue; | |
11520 | ||
11521 | t2_regfile = xtensa_operand_regfile (isa, insn->opcode, j); | |
11522 | t2_base_reg = insn->tok[j].X_add_number; | |
11523 | t2_last_reg | |
11524 | = t2_base_reg + xtensa_operand_num_regs (isa, insn->opcode, j); | |
11525 | ||
11526 | for (i = 0; i < insn->ntok; i++) | |
11527 | { | |
11528 | if (i == j) | |
11529 | continue; | |
11530 | ||
11531 | if (xtensa_operand_is_register (isa, insn->opcode, i) != 1) | |
11532 | continue; | |
11533 | ||
11534 | t1_regfile = xtensa_operand_regfile (isa, insn->opcode, i); | |
11535 | ||
11536 | if (t1_regfile != t2_regfile) | |
11537 | continue; | |
11538 | ||
11539 | t1_inout = xtensa_operand_inout (isa, insn->opcode, i); | |
11540 | t2_inout = xtensa_operand_inout (isa, insn->opcode, j); | |
11541 | ||
11542 | t1_base_reg = insn->tok[i].X_add_number; | |
11543 | t1_last_reg = (t1_base_reg | |
11544 | + xtensa_operand_num_regs (isa, insn->opcode, i)); | |
11545 | ||
11546 | for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++) | |
11547 | { | |
11548 | for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++) | |
11549 | { | |
11550 | if (t1_reg != t2_reg) | |
11551 | continue; | |
11552 | ||
11553 | if (t1_inout != 'i' && t2_inout != 'i') | |
11554 | { | |
11555 | as_bad (_("multiple writes to the same register")); | |
11556 | return TRUE; | |
11557 | } | |
11558 | } | |
11559 | } | |
11560 | } | |
11561 | } | |
e0001a05 NC |
11562 | return FALSE; |
11563 | } | |
11564 | ||
11565 | ||
11566 | /* Load an instruction from its encoded form. */ | |
11567 | ||
11568 | static void | |
7fa3d080 | 11569 | tinsn_from_chars (TInsn *tinsn, char *f, int slot) |
e0001a05 | 11570 | { |
43cd72b9 | 11571 | vliw_insn vinsn; |
e0001a05 | 11572 | |
43cd72b9 BW |
11573 | xg_init_vinsn (&vinsn); |
11574 | vinsn_from_chars (&vinsn, f); | |
11575 | ||
11576 | *tinsn = vinsn.slots[slot]; | |
11577 | xg_free_vinsn (&vinsn); | |
11578 | } | |
e0001a05 | 11579 | |
43cd72b9 BW |
11580 | |
11581 | static void | |
7fa3d080 BW |
11582 | tinsn_from_insnbuf (TInsn *tinsn, |
11583 | xtensa_insnbuf slotbuf, | |
11584 | xtensa_format fmt, | |
11585 | int slot) | |
43cd72b9 BW |
11586 | { |
11587 | int i; | |
11588 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 NC |
11589 | |
11590 | /* Find the immed. */ | |
43cd72b9 BW |
11591 | tinsn_init (tinsn); |
11592 | tinsn->insn_type = ITYPE_INSN; | |
11593 | tinsn->is_specific_opcode = FALSE; /* must not be specific */ | |
11594 | tinsn->opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
11595 | tinsn->ntok = xtensa_opcode_num_operands (isa, tinsn->opcode); | |
11596 | for (i = 0; i < tinsn->ntok; i++) | |
e0001a05 | 11597 | { |
43cd72b9 BW |
11598 | set_expr_const (&tinsn->tok[i], |
11599 | xtensa_insnbuf_get_operand (slotbuf, fmt, slot, | |
11600 | tinsn->opcode, i)); | |
e0001a05 NC |
11601 | } |
11602 | } | |
11603 | ||
11604 | ||
11605 | /* Read the value of the relaxable immed from the fr_symbol and fr_offset. */ | |
11606 | ||
11607 | static void | |
7fa3d080 | 11608 | tinsn_immed_from_frag (TInsn *tinsn, fragS *fragP, int slot) |
e0001a05 | 11609 | { |
43cd72b9 | 11610 | xtensa_opcode opcode = tinsn->opcode; |
e0001a05 NC |
11611 | int opnum; |
11612 | ||
43cd72b9 | 11613 | if (fragP->tc_frag_data.slot_symbols[slot]) |
e0001a05 NC |
11614 | { |
11615 | opnum = get_relaxable_immed (opcode); | |
9c2799c2 | 11616 | gas_assert (opnum >= 0); |
e7da6241 BW |
11617 | set_expr_symbol_offset (&tinsn->tok[opnum], |
11618 | fragP->tc_frag_data.slot_symbols[slot], | |
11619 | fragP->tc_frag_data.slot_offsets[slot]); | |
e0001a05 | 11620 | } |
19e8f41a | 11621 | tinsn->extra_arg = fragP->tc_frag_data.free_reg[slot]; |
e0001a05 NC |
11622 | } |
11623 | ||
11624 | ||
11625 | static int | |
7fa3d080 | 11626 | get_num_stack_text_bytes (IStack *istack) |
e0001a05 NC |
11627 | { |
11628 | int i; | |
11629 | int text_bytes = 0; | |
11630 | ||
11631 | for (i = 0; i < istack->ninsn; i++) | |
11632 | { | |
43cd72b9 BW |
11633 | TInsn *tinsn = &istack->insn[i]; |
11634 | if (tinsn->insn_type == ITYPE_INSN) | |
11635 | text_bytes += xg_get_single_size (tinsn->opcode); | |
e0001a05 NC |
11636 | } |
11637 | return text_bytes; | |
11638 | } | |
11639 | ||
11640 | ||
11641 | static int | |
7fa3d080 | 11642 | get_num_stack_literal_bytes (IStack *istack) |
e0001a05 NC |
11643 | { |
11644 | int i; | |
11645 | int lit_bytes = 0; | |
11646 | ||
11647 | for (i = 0; i < istack->ninsn; i++) | |
11648 | { | |
43cd72b9 BW |
11649 | TInsn *tinsn = &istack->insn[i]; |
11650 | if (tinsn->insn_type == ITYPE_LITERAL && tinsn->ntok == 1) | |
e0001a05 NC |
11651 | lit_bytes += 4; |
11652 | } | |
11653 | return lit_bytes; | |
11654 | } | |
11655 | ||
43cd72b9 BW |
11656 | \f |
11657 | /* vliw_insn functions. */ | |
11658 | ||
7fa3d080 BW |
11659 | static void |
11660 | xg_init_vinsn (vliw_insn *v) | |
43cd72b9 BW |
11661 | { |
11662 | int i; | |
11663 | xtensa_isa isa = xtensa_default_isa; | |
11664 | ||
11665 | xg_clear_vinsn (v); | |
11666 | ||
11667 | v->insnbuf = xtensa_insnbuf_alloc (isa); | |
11668 | if (v->insnbuf == NULL) | |
11669 | as_fatal (_("out of memory")); | |
11670 | ||
62af60e2 | 11671 | for (i = 0; i < config_max_slots; i++) |
43cd72b9 | 11672 | { |
43cd72b9 BW |
11673 | v->slotbuf[i] = xtensa_insnbuf_alloc (isa); |
11674 | if (v->slotbuf[i] == NULL) | |
11675 | as_fatal (_("out of memory")); | |
11676 | } | |
11677 | } | |
11678 | ||
11679 | ||
7fa3d080 BW |
11680 | static void |
11681 | xg_clear_vinsn (vliw_insn *v) | |
43cd72b9 BW |
11682 | { |
11683 | int i; | |
65738a7d | 11684 | |
62af60e2 SA |
11685 | memset (v, 0, offsetof (vliw_insn, slots) |
11686 | + sizeof(TInsn) * config_max_slots); | |
65738a7d | 11687 | |
43cd72b9 BW |
11688 | v->format = XTENSA_UNDEFINED; |
11689 | v->num_slots = 0; | |
11690 | v->inside_bundle = FALSE; | |
11691 | ||
11692 | if (xt_saved_debug_type != DEBUG_NONE) | |
11693 | debug_type = xt_saved_debug_type; | |
11694 | ||
62af60e2 | 11695 | for (i = 0; i < config_max_slots; i++) |
65738a7d | 11696 | v->slots[i].opcode = XTENSA_UNDEFINED; |
43cd72b9 BW |
11697 | } |
11698 | ||
11699 | ||
d8392fd9 SA |
11700 | static void |
11701 | xg_copy_vinsn (vliw_insn *dst, vliw_insn *src) | |
11702 | { | |
11703 | memcpy (dst, src, | |
11704 | offsetof(vliw_insn, slots) + src->num_slots * sizeof(TInsn)); | |
11705 | dst->insnbuf = src->insnbuf; | |
11706 | memcpy (dst->slotbuf, src->slotbuf, src->num_slots * sizeof(xtensa_insnbuf)); | |
11707 | } | |
11708 | ||
11709 | ||
7fa3d080 BW |
11710 | static bfd_boolean |
11711 | vinsn_has_specific_opcodes (vliw_insn *v) | |
43cd72b9 BW |
11712 | { |
11713 | int i; | |
c138bc38 | 11714 | |
43cd72b9 BW |
11715 | for (i = 0; i < v->num_slots; i++) |
11716 | { | |
11717 | if (v->slots[i].is_specific_opcode) | |
11718 | return TRUE; | |
11719 | } | |
11720 | return FALSE; | |
11721 | } | |
11722 | ||
11723 | ||
7fa3d080 BW |
11724 | static void |
11725 | xg_free_vinsn (vliw_insn *v) | |
43cd72b9 BW |
11726 | { |
11727 | int i; | |
11728 | xtensa_insnbuf_free (xtensa_default_isa, v->insnbuf); | |
62af60e2 | 11729 | for (i = 0; i < config_max_slots; i++) |
43cd72b9 BW |
11730 | xtensa_insnbuf_free (xtensa_default_isa, v->slotbuf[i]); |
11731 | } | |
11732 | ||
11733 | ||
e7da6241 BW |
11734 | /* Encode a vliw_insn into an insnbuf. Return TRUE if there are any symbolic |
11735 | operands. See also the assumptions listed for tinsn_to_slotbuf. */ | |
43cd72b9 BW |
11736 | |
11737 | static bfd_boolean | |
7fa3d080 BW |
11738 | vinsn_to_insnbuf (vliw_insn *vinsn, |
11739 | char *frag_offset, | |
11740 | fragS *fragP, | |
11741 | bfd_boolean record_fixup) | |
43cd72b9 BW |
11742 | { |
11743 | xtensa_isa isa = xtensa_default_isa; | |
11744 | xtensa_format fmt = vinsn->format; | |
11745 | xtensa_insnbuf insnbuf = vinsn->insnbuf; | |
11746 | int slot; | |
11747 | bfd_boolean has_fixup = FALSE; | |
11748 | ||
11749 | xtensa_format_encode (isa, fmt, insnbuf); | |
11750 | ||
11751 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
11752 | { | |
11753 | TInsn *tinsn = &vinsn->slots[slot]; | |
19e8f41a | 11754 | expressionS *extra_arg = &tinsn->extra_arg; |
43cd72b9 BW |
11755 | bfd_boolean tinsn_has_fixup = |
11756 | tinsn_to_slotbuf (vinsn->format, slot, tinsn, | |
11757 | vinsn->slotbuf[slot]); | |
11758 | ||
11759 | xtensa_format_set_slot (isa, fmt, slot, | |
11760 | insnbuf, vinsn->slotbuf[slot]); | |
19e8f41a | 11761 | if (extra_arg->X_op != O_illegal && extra_arg->X_op != O_register) |
28dbbc02 BW |
11762 | { |
11763 | if (vinsn->num_slots != 1) | |
11764 | as_bad (_("TLS relocation not allowed in FLIX bundle")); | |
11765 | else if (record_fixup) | |
11766 | /* Instructions that generate TLS relocations should always be | |
11767 | relaxed in the front-end. If "record_fixup" is set, then this | |
11768 | function is being called during back-end relaxation, so flag | |
11769 | the unexpected behavior as an error. */ | |
11770 | as_bad (_("unexpected TLS relocation")); | |
11771 | else | |
11772 | fix_new (fragP, frag_offset - fragP->fr_literal, | |
11773 | xtensa_format_length (isa, fmt), | |
19e8f41a BW |
11774 | extra_arg->X_add_symbol, extra_arg->X_add_number, |
11775 | FALSE, map_operator_to_reloc (extra_arg->X_op, FALSE)); | |
28dbbc02 | 11776 | } |
e7da6241 | 11777 | if (tinsn_has_fixup) |
43cd72b9 BW |
11778 | { |
11779 | int i; | |
11780 | xtensa_opcode opcode = tinsn->opcode; | |
11781 | int noperands = xtensa_opcode_num_operands (isa, opcode); | |
11782 | has_fixup = TRUE; | |
11783 | ||
11784 | for (i = 0; i < noperands; i++) | |
11785 | { | |
11786 | expressionS* expr = &tinsn->tok[i]; | |
11787 | switch (expr->X_op) | |
11788 | { | |
11789 | case O_symbol: | |
11790 | case O_lo16: | |
11791 | case O_hi16: | |
11792 | if (get_relaxable_immed (opcode) == i) | |
11793 | { | |
e7da6241 BW |
11794 | /* Add a fix record for the instruction, except if this |
11795 | function is being called prior to relaxation, i.e., | |
11796 | if record_fixup is false, and the instruction might | |
11797 | be relaxed later. */ | |
11798 | if (record_fixup | |
11799 | || tinsn->is_specific_opcode | |
11800 | || !xg_is_relaxable_insn (tinsn, 0)) | |
43cd72b9 | 11801 | { |
e7da6241 BW |
11802 | xg_add_opcode_fix (tinsn, i, fmt, slot, expr, fragP, |
11803 | frag_offset - fragP->fr_literal); | |
43cd72b9 BW |
11804 | } |
11805 | else | |
11806 | { | |
e7da6241 BW |
11807 | if (expr->X_op != O_symbol) |
11808 | as_bad (_("invalid operand")); | |
43cd72b9 BW |
11809 | tinsn->symbol = expr->X_add_symbol; |
11810 | tinsn->offset = expr->X_add_number; | |
11811 | } | |
11812 | } | |
11813 | else | |
e7da6241 | 11814 | as_bad (_("symbolic operand not allowed")); |
43cd72b9 BW |
11815 | break; |
11816 | ||
11817 | case O_constant: | |
11818 | case O_register: | |
11819 | break; | |
11820 | ||
43cd72b9 | 11821 | default: |
e7da6241 | 11822 | as_bad (_("expression too complex")); |
43cd72b9 BW |
11823 | break; |
11824 | } | |
11825 | } | |
11826 | } | |
11827 | } | |
11828 | ||
11829 | return has_fixup; | |
11830 | } | |
11831 | ||
11832 | ||
11833 | static void | |
7fa3d080 | 11834 | vinsn_from_chars (vliw_insn *vinsn, char *f) |
43cd72b9 BW |
11835 | { |
11836 | static xtensa_insnbuf insnbuf = NULL; | |
11837 | static xtensa_insnbuf slotbuf = NULL; | |
11838 | int i; | |
11839 | xtensa_format fmt; | |
11840 | xtensa_isa isa = xtensa_default_isa; | |
11841 | ||
11842 | if (!insnbuf) | |
11843 | { | |
11844 | insnbuf = xtensa_insnbuf_alloc (isa); | |
11845 | slotbuf = xtensa_insnbuf_alloc (isa); | |
11846 | } | |
11847 | ||
d77b99c9 | 11848 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) f, 0); |
43cd72b9 BW |
11849 | fmt = xtensa_format_decode (isa, insnbuf); |
11850 | if (fmt == XTENSA_UNDEFINED) | |
11851 | as_fatal (_("cannot decode instruction format")); | |
11852 | vinsn->format = fmt; | |
11853 | vinsn->num_slots = xtensa_format_num_slots (isa, fmt); | |
11854 | ||
11855 | for (i = 0; i < vinsn->num_slots; i++) | |
11856 | { | |
11857 | TInsn *tinsn = &vinsn->slots[i]; | |
11858 | xtensa_format_get_slot (isa, fmt, i, insnbuf, slotbuf); | |
11859 | tinsn_from_insnbuf (tinsn, slotbuf, fmt, i); | |
11860 | } | |
11861 | } | |
11862 | ||
e0001a05 NC |
11863 | \f |
11864 | /* Expression utilities. */ | |
11865 | ||
43cd72b9 | 11866 | /* Return TRUE if the expression is an integer constant. */ |
e0001a05 NC |
11867 | |
11868 | bfd_boolean | |
7fa3d080 | 11869 | expr_is_const (const expressionS *s) |
e0001a05 NC |
11870 | { |
11871 | return (s->X_op == O_constant); | |
11872 | } | |
11873 | ||
11874 | ||
11875 | /* Get the expression constant. | |
43cd72b9 | 11876 | Calling this is illegal if expr_is_const () returns TRUE. */ |
e0001a05 NC |
11877 | |
11878 | offsetT | |
7fa3d080 | 11879 | get_expr_const (const expressionS *s) |
e0001a05 | 11880 | { |
9c2799c2 | 11881 | gas_assert (expr_is_const (s)); |
e0001a05 NC |
11882 | return s->X_add_number; |
11883 | } | |
11884 | ||
11885 | ||
11886 | /* Set the expression to a constant value. */ | |
11887 | ||
11888 | void | |
7fa3d080 | 11889 | set_expr_const (expressionS *s, offsetT val) |
e0001a05 NC |
11890 | { |
11891 | s->X_op = O_constant; | |
11892 | s->X_add_number = val; | |
11893 | s->X_add_symbol = NULL; | |
11894 | s->X_op_symbol = NULL; | |
11895 | } | |
11896 | ||
11897 | ||
43cd72b9 | 11898 | bfd_boolean |
7fa3d080 | 11899 | expr_is_register (const expressionS *s) |
43cd72b9 BW |
11900 | { |
11901 | return (s->X_op == O_register); | |
11902 | } | |
11903 | ||
11904 | ||
11905 | /* Get the expression constant. | |
11906 | Calling this is illegal if expr_is_const () returns TRUE. */ | |
11907 | ||
11908 | offsetT | |
7fa3d080 | 11909 | get_expr_register (const expressionS *s) |
43cd72b9 | 11910 | { |
9c2799c2 | 11911 | gas_assert (expr_is_register (s)); |
43cd72b9 BW |
11912 | return s->X_add_number; |
11913 | } | |
11914 | ||
11915 | ||
e0001a05 NC |
11916 | /* Set the expression to a symbol + constant offset. */ |
11917 | ||
11918 | void | |
7fa3d080 | 11919 | set_expr_symbol_offset (expressionS *s, symbolS *sym, offsetT offset) |
e0001a05 NC |
11920 | { |
11921 | s->X_op = O_symbol; | |
11922 | s->X_add_symbol = sym; | |
11923 | s->X_op_symbol = NULL; /* unused */ | |
11924 | s->X_add_number = offset; | |
11925 | } | |
11926 | ||
11927 | ||
43cd72b9 BW |
11928 | /* Return TRUE if the two expressions are equal. */ |
11929 | ||
e0001a05 | 11930 | bfd_boolean |
7fa3d080 | 11931 | expr_is_equal (expressionS *s1, expressionS *s2) |
e0001a05 NC |
11932 | { |
11933 | if (s1->X_op != s2->X_op) | |
11934 | return FALSE; | |
11935 | if (s1->X_add_symbol != s2->X_add_symbol) | |
11936 | return FALSE; | |
11937 | if (s1->X_op_symbol != s2->X_op_symbol) | |
11938 | return FALSE; | |
11939 | if (s1->X_add_number != s2->X_add_number) | |
11940 | return FALSE; | |
11941 | return TRUE; | |
11942 | } | |
11943 | ||
11944 | ||
11945 | static void | |
7fa3d080 | 11946 | copy_expr (expressionS *dst, const expressionS *src) |
e0001a05 NC |
11947 | { |
11948 | memcpy (dst, src, sizeof (expressionS)); | |
11949 | } | |
11950 | ||
11951 | \f | |
9456465c | 11952 | /* Support for the "--rename-section" option. */ |
e0001a05 NC |
11953 | |
11954 | struct rename_section_struct | |
11955 | { | |
11956 | char *old_name; | |
11957 | char *new_name; | |
11958 | struct rename_section_struct *next; | |
11959 | }; | |
11960 | ||
11961 | static struct rename_section_struct *section_rename; | |
11962 | ||
11963 | ||
9456465c BW |
11964 | /* Parse the string "oldname=new_name(:oldname2=new_name2)*" and add |
11965 | entries to the section_rename list. Note: Specifying multiple | |
11966 | renamings separated by colons is not documented and is retained only | |
11967 | for backward compatibility. */ | |
e0001a05 | 11968 | |
7fa3d080 BW |
11969 | static void |
11970 | build_section_rename (const char *arg) | |
e0001a05 | 11971 | { |
9456465c | 11972 | struct rename_section_struct *r; |
e0001a05 NC |
11973 | char *this_arg = NULL; |
11974 | char *next_arg = NULL; | |
11975 | ||
9456465c | 11976 | for (this_arg = xstrdup (arg); this_arg != NULL; this_arg = next_arg) |
e0001a05 | 11977 | { |
9456465c BW |
11978 | char *old_name, *new_name; |
11979 | ||
e0001a05 NC |
11980 | if (this_arg) |
11981 | { | |
11982 | next_arg = strchr (this_arg, ':'); | |
11983 | if (next_arg) | |
11984 | { | |
11985 | *next_arg = '\0'; | |
11986 | next_arg++; | |
11987 | } | |
11988 | } | |
e0001a05 | 11989 | |
9456465c BW |
11990 | old_name = this_arg; |
11991 | new_name = strchr (this_arg, '='); | |
e0001a05 | 11992 | |
9456465c BW |
11993 | if (*old_name == '\0') |
11994 | { | |
11995 | as_warn (_("ignoring extra '-rename-section' delimiter ':'")); | |
11996 | continue; | |
11997 | } | |
11998 | if (!new_name || new_name[1] == '\0') | |
11999 | { | |
12000 | as_warn (_("ignoring invalid '-rename-section' specification: '%s'"), | |
12001 | old_name); | |
12002 | continue; | |
12003 | } | |
12004 | *new_name = '\0'; | |
12005 | new_name++; | |
e0001a05 | 12006 | |
9456465c BW |
12007 | /* Check for invalid section renaming. */ |
12008 | for (r = section_rename; r != NULL; r = r->next) | |
12009 | { | |
12010 | if (strcmp (r->old_name, old_name) == 0) | |
12011 | as_bad (_("section %s renamed multiple times"), old_name); | |
12012 | if (strcmp (r->new_name, new_name) == 0) | |
12013 | as_bad (_("multiple sections remapped to output section %s"), | |
12014 | new_name); | |
12015 | } | |
e0001a05 | 12016 | |
9456465c BW |
12017 | /* Now add it. */ |
12018 | r = (struct rename_section_struct *) | |
12019 | xmalloc (sizeof (struct rename_section_struct)); | |
12020 | r->old_name = xstrdup (old_name); | |
12021 | r->new_name = xstrdup (new_name); | |
12022 | r->next = section_rename; | |
12023 | section_rename = r; | |
e0001a05 | 12024 | } |
e0001a05 NC |
12025 | } |
12026 | ||
12027 | ||
9456465c BW |
12028 | char * |
12029 | xtensa_section_rename (char *name) | |
e0001a05 NC |
12030 | { |
12031 | struct rename_section_struct *r = section_rename; | |
12032 | ||
12033 | for (r = section_rename; r != NULL; r = r->next) | |
43cd72b9 BW |
12034 | { |
12035 | if (strcmp (r->old_name, name) == 0) | |
12036 | return r->new_name; | |
12037 | } | |
e0001a05 NC |
12038 | |
12039 | return name; | |
12040 | } |