Commit | Line | Data |
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40b36596 | 1 | /* TI C6X assembler. |
98d23bef | 2 | Copyright 2010, 2011 |
40b36596 | 3 | Free Software Foundation, Inc. |
c0621d88 NS |
4 | Contributed by Joseph Myers <joseph@codesourcery.com> |
5 | Bernd Schmidt <bernds@codesourcery.com> | |
40b36596 JM |
6 | |
7 | This file is part of GAS, the GNU Assembler. | |
8 | ||
9 | GAS is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GAS is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GAS; see the file COPYING. If not, write to the Free | |
21 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
22 | 02110-1301, USA. */ | |
23 | ||
24 | #include "as.h" | |
25 | #include "dwarf2dbg.h" | |
1bce6bd8 | 26 | #include "dw2gencfi.h" |
40b36596 JM |
27 | #include "safe-ctype.h" |
28 | #include "subsegs.h" | |
29 | #include "opcode/tic6x.h" | |
59e6276b | 30 | #include "elf/tic6x.h" |
41820509 | 31 | #include "elf32-tic6x.h" |
40b36596 JM |
32 | |
33 | /* Truncate and sign-extend at 32 bits, so that building on a 64-bit | |
34 | host gives identical results to a 32-bit host. */ | |
35 | #define TRUNC(X) ((valueT) (X) & 0xffffffffU) | |
36 | #define SEXT(X) ((TRUNC (X) ^ 0x80000000U) - 0x80000000U) | |
37 | ||
1bce6bd8 PB |
38 | #define streq(a, b) (strcmp (a, b) == 0) |
39 | ||
ac145307 BS |
40 | /* Stuff for .scomm symbols. */ |
41 | static segT sbss_section; | |
42 | static asection scom_section; | |
43 | static asymbol scom_symbol; | |
44 | ||
40b36596 JM |
45 | const char comment_chars[] = ";"; |
46 | const char line_comment_chars[] = "#*;"; | |
47 | const char line_separator_chars[] = "@"; | |
48 | ||
49 | const char EXP_CHARS[] = "eE"; | |
50 | const char FLT_CHARS[] = "dDfF"; | |
51 | ||
52 | const char *md_shortopts = ""; | |
53 | ||
54 | enum | |
55 | { | |
56 | OPTION_MARCH = OPTION_MD_BASE, | |
40b36596 | 57 | OPTION_MBIG_ENDIAN, |
41820509 | 58 | OPTION_MLITTLE_ENDIAN, |
b5593623 JM |
59 | OPTION_MDSBT, |
60 | OPTION_MNO_DSBT, | |
87779176 JM |
61 | OPTION_MPID, |
62 | OPTION_MPIC, | |
63 | OPTION_MNO_PIC, | |
41820509 | 64 | OPTION_MGENERATE_REL |
40b36596 JM |
65 | }; |
66 | ||
67 | struct option md_longopts[] = | |
68 | { | |
69 | { "march", required_argument, NULL, OPTION_MARCH }, | |
40b36596 JM |
70 | { "mbig-endian", no_argument, NULL, OPTION_MBIG_ENDIAN }, |
71 | { "mlittle-endian", no_argument, NULL, OPTION_MLITTLE_ENDIAN }, | |
b5593623 JM |
72 | { "mdsbt", no_argument, NULL, OPTION_MDSBT }, |
73 | { "mno-dsbt", no_argument, NULL, OPTION_MNO_DSBT }, | |
87779176 JM |
74 | { "mpid", required_argument, NULL, OPTION_MPID }, |
75 | { "mpic", no_argument, NULL, OPTION_MPIC }, | |
76 | { "mno-pic", no_argument, NULL, OPTION_MNO_PIC }, | |
41820509 | 77 | { "mgenerate-rel", no_argument, NULL, OPTION_MGENERATE_REL }, |
40b36596 JM |
78 | { NULL, no_argument, NULL, 0 } |
79 | }; | |
80 | size_t md_longopts_size = sizeof (md_longopts); | |
81 | ||
40b36596 | 82 | /* The instructions enabled based only on the selected architecture |
98d23bef | 83 | (all instructions, if no architecture specified). */ |
40b36596 JM |
84 | static unsigned short tic6x_arch_enable = (TIC6X_INSN_C62X |
85 | | TIC6X_INSN_C64X | |
86 | | TIC6X_INSN_C64XP | |
87 | | TIC6X_INSN_C67X | |
88 | | TIC6X_INSN_C67XP | |
98d23bef | 89 | | TIC6X_INSN_C674X); |
40b36596 JM |
90 | |
91 | /* The instructions enabled based on the current set of features | |
92 | (architecture, as modified by other options). */ | |
93 | static unsigned short tic6x_features; | |
94 | ||
75fa6dc1 | 95 | /* The architecture attribute value, or C6XABI_Tag_ISA_none if |
59e6276b | 96 | not yet set. */ |
75fa6dc1 | 97 | static int tic6x_arch_attribute = C6XABI_Tag_ISA_none; |
59e6276b JM |
98 | |
99 | /* Whether any instructions at all have been seen. Once any | |
100 | instructions have been seen, architecture attributes merge into the | |
101 | previous attribute value rather than replacing it. */ | |
102 | static bfd_boolean tic6x_seen_insns = FALSE; | |
103 | ||
40b36596 JM |
104 | /* The number of registers in each register file supported by the |
105 | current architecture. */ | |
106 | static unsigned int tic6x_num_registers; | |
107 | ||
108 | /* Whether predication on A0 is possible. */ | |
109 | static bfd_boolean tic6x_predicate_a0; | |
110 | ||
111 | /* Whether execute packets can cross fetch packet boundaries. */ | |
112 | static bfd_boolean tic6x_can_cross_fp_boundary; | |
113 | ||
114 | /* Whether there are constraints on simultaneous reads and writes of | |
115 | 40-bit data. */ | |
116 | static bfd_boolean tic6x_long_data_constraints; | |
117 | ||
118 | /* Whether compact instructions are available. */ | |
119 | static bfd_boolean tic6x_compact_insns; | |
120 | ||
41820509 JM |
121 | /* Whether to generate RELA relocations. */ |
122 | static bfd_boolean tic6x_generate_rela = TRUE; | |
123 | ||
b5593623 JM |
124 | /* Whether the code uses DSBT addressing. */ |
125 | static bfd_boolean tic6x_dsbt; | |
126 | ||
87779176 JM |
127 | /* Types of position-independent data (attribute values for |
128 | Tag_ABI_PID). */ | |
129 | typedef enum | |
130 | { | |
131 | tic6x_pid_no = 0, | |
132 | tic6x_pid_near = 1, | |
133 | tic6x_pid_far = 2 | |
134 | } tic6x_pid_type; | |
135 | ||
136 | /* The type of data addressing used in this code. */ | |
137 | static tic6x_pid_type tic6x_pid; | |
138 | ||
139 | /* Whether the code uses position-independent code. */ | |
140 | static bfd_boolean tic6x_pic; | |
141 | ||
40b36596 JM |
142 | /* Table of supported architecture variants. */ |
143 | typedef struct | |
144 | { | |
145 | const char *arch; | |
59e6276b | 146 | int attr; |
40b36596 JM |
147 | unsigned short features; |
148 | } tic6x_arch_table; | |
149 | static const tic6x_arch_table tic6x_arches[] = | |
150 | { | |
75fa6dc1 JM |
151 | { "c62x", C6XABI_Tag_ISA_C62X, TIC6X_INSN_C62X }, |
152 | { "c64x", C6XABI_Tag_ISA_C64X, TIC6X_INSN_C62X | TIC6X_INSN_C64X }, | |
153 | { "c64x+", C6XABI_Tag_ISA_C64XP, (TIC6X_INSN_C62X | |
154 | | TIC6X_INSN_C64X | |
155 | | TIC6X_INSN_C64XP) }, | |
156 | { "c67x", C6XABI_Tag_ISA_C67X, TIC6X_INSN_C62X | TIC6X_INSN_C67X }, | |
157 | { "c67x+", C6XABI_Tag_ISA_C67XP, (TIC6X_INSN_C62X | |
158 | | TIC6X_INSN_C67X | |
159 | | TIC6X_INSN_C67XP) }, | |
160 | { "c674x", C6XABI_Tag_ISA_C674X, (TIC6X_INSN_C62X | |
161 | | TIC6X_INSN_C64X | |
162 | | TIC6X_INSN_C64XP | |
163 | | TIC6X_INSN_C67X | |
164 | | TIC6X_INSN_C67XP | |
165 | | TIC6X_INSN_C674X) } | |
40b36596 JM |
166 | }; |
167 | ||
1bce6bd8 PB |
168 | /* Caller saved register encodings. The standard frame layout uses this |
169 | order, starting from the highest address. There must be | |
170 | TIC6X_NUM_UNWIND_REGS values. */ | |
171 | enum | |
172 | { | |
173 | UNWIND_A15, | |
174 | UNWIND_B15, | |
175 | UNWIND_B14, | |
176 | UNWIND_B13, | |
177 | UNWIND_B12, | |
178 | UNWIND_B11, | |
179 | UNWIND_B10, | |
180 | UNWIND_B3, | |
181 | UNWIND_A14, | |
182 | UNWIND_A13, | |
183 | UNWIND_A12, | |
184 | UNWIND_A11, | |
185 | UNWIND_A10 | |
186 | }; | |
187 | ||
188 | static void tic6x_output_unwinding (bfd_boolean need_extab); | |
189 | ||
190 | /* Return the frame unwind state for the current function, allocating | |
191 | as necessary. */ | |
192 | ||
193 | static tic6x_unwind_info *tic6x_get_unwind (void) | |
194 | { | |
195 | tic6x_unwind_info *unwind; | |
196 | ||
197 | unwind = seg_info (now_seg)->tc_segment_info_data.unwind; | |
198 | if (unwind) | |
199 | return unwind; | |
200 | ||
201 | unwind = seg_info (now_seg)->tc_segment_info_data.text_unwind; | |
202 | if (unwind) | |
203 | return unwind; | |
204 | ||
205 | unwind = (tic6x_unwind_info *)xmalloc (sizeof (tic6x_unwind_info)); | |
206 | seg_info (now_seg)->tc_segment_info_data.unwind = unwind; | |
207 | memset (unwind, 0, sizeof (*unwind)); | |
208 | return unwind; | |
209 | } | |
210 | ||
40b36596 JM |
211 | /* Update the selected architecture based on ARCH, giving an error if |
212 | ARCH is an invalid value. Does not call tic6x_update_features; the | |
213 | caller must do that if necessary. */ | |
214 | ||
215 | static void | |
216 | tic6x_use_arch (const char *arch) | |
217 | { | |
218 | unsigned int i; | |
219 | ||
220 | for (i = 0; i < ARRAY_SIZE (tic6x_arches); i++) | |
221 | if (strcmp (arch, tic6x_arches[i].arch) == 0) | |
222 | { | |
223 | tic6x_arch_enable = tic6x_arches[i].features; | |
59e6276b JM |
224 | if (tic6x_seen_insns) |
225 | tic6x_arch_attribute | |
226 | = elf32_tic6x_merge_arch_attributes (tic6x_arch_attribute, | |
227 | tic6x_arches[i].attr); | |
228 | else | |
229 | tic6x_arch_attribute = tic6x_arches[i].attr; | |
40b36596 JM |
230 | return; |
231 | } | |
232 | ||
233 | as_bad (_("unknown architecture '%s'"), arch); | |
234 | } | |
235 | ||
87779176 JM |
236 | /* Table of supported -mpid arguments. */ |
237 | typedef struct | |
238 | { | |
239 | const char *arg; | |
240 | tic6x_pid_type attr; | |
241 | } tic6x_pid_type_table; | |
242 | static const tic6x_pid_type_table tic6x_pid_types[] = | |
243 | { | |
244 | { "no", tic6x_pid_no }, | |
245 | { "near", tic6x_pid_near }, | |
246 | { "far", tic6x_pid_far } | |
247 | }; | |
248 | ||
249 | /* Handle -mpid=ARG. */ | |
250 | ||
251 | static void | |
252 | tic6x_use_pid (const char *arg) | |
253 | { | |
254 | unsigned int i; | |
255 | ||
256 | for (i = 0; i < ARRAY_SIZE (tic6x_pid_types); i++) | |
257 | if (strcmp (arg, tic6x_pid_types[i].arg) == 0) | |
258 | { | |
259 | tic6x_pid = tic6x_pid_types[i].attr; | |
260 | return; | |
261 | } | |
262 | ||
263 | as_bad (_("unknown -mpid= argument '%s'"), arg); | |
264 | } | |
265 | ||
40b36596 JM |
266 | /* Parse a target-specific option. */ |
267 | ||
268 | int | |
269 | md_parse_option (int c, char *arg) | |
270 | { | |
271 | switch (c) | |
272 | { | |
273 | case OPTION_MARCH: | |
274 | tic6x_use_arch (arg); | |
275 | break; | |
276 | ||
40b36596 JM |
277 | case OPTION_MBIG_ENDIAN: |
278 | target_big_endian = 1; | |
279 | break; | |
280 | ||
281 | case OPTION_MLITTLE_ENDIAN: | |
282 | target_big_endian = 0; | |
283 | break; | |
284 | ||
b5593623 JM |
285 | case OPTION_MDSBT: |
286 | tic6x_dsbt = 1; | |
287 | break; | |
288 | ||
289 | case OPTION_MNO_DSBT: | |
290 | tic6x_dsbt = 0; | |
291 | break; | |
292 | ||
87779176 JM |
293 | case OPTION_MPID: |
294 | tic6x_use_pid (arg); | |
295 | break; | |
296 | ||
297 | case OPTION_MPIC: | |
298 | tic6x_pic = 1; | |
299 | break; | |
300 | ||
301 | case OPTION_MNO_PIC: | |
302 | tic6x_pic = 0; | |
303 | break; | |
304 | ||
41820509 JM |
305 | case OPTION_MGENERATE_REL: |
306 | tic6x_generate_rela = FALSE; | |
307 | break; | |
308 | ||
40b36596 JM |
309 | default: |
310 | return 0; | |
311 | } | |
312 | return 1; | |
313 | } | |
314 | ||
315 | void | |
316 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
317 | { | |
318 | unsigned int i; | |
319 | ||
320 | fputc ('\n', stream); | |
321 | fprintf (stream, _("TMS320C6000 options:\n")); | |
322 | fprintf (stream, _(" -march=ARCH enable instructions from architecture ARCH\n")); | |
40b36596 JM |
323 | fprintf (stream, _(" -mbig-endian generate big-endian code\n")); |
324 | fprintf (stream, _(" -mlittle-endian generate little-endian code\n")); | |
b5593623 JM |
325 | fprintf (stream, _(" -mdsbt code uses DSBT addressing\n")); |
326 | fprintf (stream, _(" -mno-dsbt code does not use DSBT addressing\n")); | |
87779176 JM |
327 | fprintf (stream, _(" -mpid=no code uses position-dependent data addressing\n")); |
328 | fprintf (stream, _(" -mpid=near code uses position-independent data addressing,\n" | |
329 | " GOT accesses use near DP addressing\n")); | |
330 | fprintf (stream, _(" -mpid=far code uses position-independent data addressing,\n" | |
331 | " GOT accesses use far DP addressing\n")); | |
332 | fprintf (stream, _(" -mpic code addressing is position-independent\n")); | |
333 | fprintf (stream, _(" -mno-pic code addressing is position-dependent\n")); | |
41820509 JM |
334 | /* -mgenerate-rel is only for testsuite use and is deliberately |
335 | undocumented. */ | |
40b36596 JM |
336 | |
337 | fputc ('\n', stream); | |
338 | fprintf (stream, _("Supported ARCH values are:")); | |
339 | for (i = 0; i < ARRAY_SIZE (tic6x_arches); i++) | |
340 | fprintf (stream, " %s", tic6x_arches[i].arch); | |
341 | fputc ('\n', stream); | |
342 | } | |
343 | ||
344 | /* Update enabled features based on the current architecture and | |
345 | related settings. */ | |
346 | static void | |
347 | tic6x_update_features (void) | |
348 | { | |
98d23bef | 349 | tic6x_features = tic6x_arch_enable; |
40b36596 JM |
350 | |
351 | tic6x_num_registers | |
352 | = (tic6x_arch_enable & (TIC6X_INSN_C64X | TIC6X_INSN_C67XP)) ? 32 : 16; | |
353 | ||
354 | tic6x_predicate_a0 = (tic6x_arch_enable & TIC6X_INSN_C64X) ? TRUE : FALSE; | |
355 | ||
356 | tic6x_can_cross_fp_boundary | |
357 | = (tic6x_arch_enable | |
358 | & (TIC6X_INSN_C64X | TIC6X_INSN_C67XP)) ? TRUE : FALSE; | |
359 | ||
360 | tic6x_long_data_constraints | |
361 | = (tic6x_arch_enable & TIC6X_INSN_C64X) ? FALSE : TRUE; | |
362 | ||
363 | tic6x_compact_insns = (tic6x_arch_enable & TIC6X_INSN_C64XP) ? TRUE : FALSE; | |
364 | } | |
365 | ||
366 | /* Do configuration after all options have been parsed. */ | |
367 | ||
368 | void | |
369 | tic6x_after_parse_args (void) | |
370 | { | |
371 | tic6x_update_features (); | |
372 | } | |
373 | ||
1bce6bd8 PB |
374 | /* Parse a .cantunwind directive. */ |
375 | static void | |
376 | s_tic6x_cantunwind (int ignored ATTRIBUTE_UNUSED) | |
377 | { | |
378 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
379 | ||
380 | /* GCC sometimes spits out superfluous .cantunwind directives, so ignore | |
381 | them. */ | |
382 | if (unwind->data_bytes == 0) | |
383 | return; | |
384 | ||
385 | if (unwind->data_bytes != -1) | |
386 | { | |
387 | as_bad (_("unexpected .cantunwind directive")); | |
388 | return; | |
389 | } | |
390 | ||
391 | demand_empty_rest_of_line (); | |
392 | ||
393 | if (unwind->personality_routine || unwind->personality_index != -1) | |
394 | as_bad (_("personality routine specified for cantunwind frame")); | |
395 | ||
396 | unwind->personality_index = -2; | |
397 | } | |
398 | ||
399 | /* Parse a .handlerdata directive. */ | |
400 | static void | |
401 | s_tic6x_handlerdata (int ignored ATTRIBUTE_UNUSED) | |
402 | { | |
403 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
404 | ||
405 | if (!unwind->saved_seg) | |
406 | { | |
407 | as_bad (_("unexpected .handlerdata directive")); | |
408 | return; | |
409 | } | |
410 | ||
411 | if (unwind->table_entry || unwind->personality_index == -2) | |
412 | { | |
413 | as_bad (_("duplicate .handlerdata directive")); | |
414 | return; | |
415 | } | |
416 | ||
417 | if (unwind->personality_index == -1 && unwind->personality_routine == NULL) | |
418 | { | |
419 | as_bad (_("personality routine required before .handlerdata directive")); | |
420 | return; | |
421 | } | |
422 | ||
423 | tic6x_output_unwinding (TRUE); | |
424 | } | |
425 | ||
426 | /* Parse a .endp directive. */ | |
427 | static void | |
428 | s_tic6x_endp (int ignored ATTRIBUTE_UNUSED) | |
429 | { | |
430 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
431 | ||
432 | if (unwind->data_bytes != 0) | |
433 | { | |
434 | /* Output a .exidx entry if we have not already done so. | |
435 | Then switch back to the text section. */ | |
436 | if (!unwind->table_entry) | |
437 | tic6x_output_unwinding (FALSE); | |
438 | ||
439 | subseg_set (unwind->saved_seg, unwind->saved_subseg); | |
440 | } | |
441 | ||
442 | unwind->saved_seg = NULL; | |
443 | unwind->table_entry = NULL; | |
444 | unwind->data_bytes = 0; | |
445 | } | |
446 | ||
447 | /* Parse a .personalityindex directive. */ | |
448 | static void | |
449 | s_tic6x_personalityindex (int ignored ATTRIBUTE_UNUSED) | |
450 | { | |
451 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
452 | expressionS exp; | |
453 | ||
454 | if (unwind->personality_routine || unwind->personality_index != -1) | |
455 | as_bad (_("duplicate .personalityindex directive")); | |
456 | ||
457 | expression (&exp); | |
458 | ||
459 | if (exp.X_op != O_constant | |
460 | || exp.X_add_number < 0 || exp.X_add_number > 15) | |
461 | { | |
462 | as_bad (_("bad personality routine number")); | |
463 | ignore_rest_of_line (); | |
464 | return; | |
465 | } | |
466 | ||
467 | unwind->personality_index = exp.X_add_number; | |
468 | ||
469 | demand_empty_rest_of_line (); | |
470 | } | |
40b36596 | 471 | |
1bce6bd8 PB |
472 | static void |
473 | s_tic6x_personality (int ignored ATTRIBUTE_UNUSED) | |
474 | { | |
475 | char *name, *p, c; | |
476 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
477 | ||
478 | if (unwind->personality_routine || unwind->personality_index != -1) | |
479 | as_bad (_("duplicate .personality directive")); | |
480 | ||
481 | name = input_line_pointer; | |
482 | c = get_symbol_end (); | |
483 | p = input_line_pointer; | |
484 | unwind->personality_routine = symbol_find_or_make (name); | |
485 | *p = c; | |
486 | demand_empty_rest_of_line (); | |
487 | } | |
488 | ||
489 | /* Parse a .arch directive. */ | |
40b36596 JM |
490 | static void |
491 | s_tic6x_arch (int ignored ATTRIBUTE_UNUSED) | |
492 | { | |
493 | char c; | |
494 | char *arch; | |
495 | ||
496 | arch = input_line_pointer; | |
497 | while (*input_line_pointer && !ISSPACE (*input_line_pointer)) | |
498 | input_line_pointer++; | |
499 | c = *input_line_pointer; | |
500 | *input_line_pointer = 0; | |
501 | ||
502 | tic6x_use_arch (arch); | |
503 | tic6x_update_features (); | |
504 | *input_line_pointer = c; | |
505 | demand_empty_rest_of_line (); | |
506 | } | |
507 | ||
2fbb87f6 PB |
508 | /* Parse a .ehtype directive. */ |
509 | ||
510 | static void | |
511 | s_tic6x_ehtype (int ignored ATTRIBUTE_UNUSED) | |
512 | { | |
513 | expressionS exp; | |
514 | char *p; | |
515 | ||
516 | #ifdef md_flush_pending_output | |
517 | md_flush_pending_output (); | |
518 | #endif | |
519 | ||
520 | if (is_it_end_of_statement ()) | |
521 | { | |
522 | demand_empty_rest_of_line (); | |
523 | return; | |
524 | } | |
525 | ||
526 | #ifdef md_cons_align | |
527 | md_cons_align (4); | |
528 | #endif | |
529 | ||
530 | ||
531 | expression (&exp); | |
532 | ||
533 | if (exp.X_op != O_symbol) | |
534 | { | |
535 | as_bad (_("expected symbol")); | |
536 | return; | |
537 | } | |
538 | ||
539 | p = frag_more (4); | |
540 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, | |
541 | &exp, 0, BFD_RELOC_C6000_EHTYPE); | |
542 | ||
543 | demand_empty_rest_of_line (); | |
544 | } | |
545 | ||
40b36596 JM |
546 | /* Parse a .nocmp directive. */ |
547 | ||
548 | static void | |
549 | s_tic6x_nocmp (int ignored ATTRIBUTE_UNUSED) | |
550 | { | |
551 | seg_info (now_seg)->tc_segment_info_data.nocmp = TRUE; | |
552 | demand_empty_rest_of_line (); | |
553 | } | |
554 | ||
ac145307 BS |
555 | /* .scomm pseudo-op handler. |
556 | ||
557 | This is a new pseudo-op to handle putting objects in .scommon. | |
558 | By doing this the linker won't need to do any work, | |
559 | and more importantly it removes the implicit -G arg necessary to | |
560 | correctly link the object file. */ | |
561 | ||
562 | static void | |
563 | s_tic6x_scomm (int ignore ATTRIBUTE_UNUSED) | |
564 | { | |
565 | char *name; | |
566 | char c; | |
567 | char *p; | |
568 | offsetT size; | |
569 | symbolS *symbolP; | |
570 | offsetT align; | |
571 | int align2; | |
572 | ||
573 | name = input_line_pointer; | |
574 | c = get_symbol_end (); | |
575 | ||
576 | /* Just after name is now '\0'. */ | |
577 | p = input_line_pointer; | |
578 | *p = c; | |
579 | SKIP_WHITESPACE (); | |
580 | if (*input_line_pointer != ',') | |
581 | { | |
582 | as_bad (_("expected comma after symbol name")); | |
583 | ignore_rest_of_line (); | |
584 | return; | |
585 | } | |
586 | ||
587 | /* Skip ','. */ | |
588 | input_line_pointer++; | |
589 | if ((size = get_absolute_expression ()) < 0) | |
590 | { | |
591 | /* xgettext:c-format */ | |
592 | as_warn (_("invalid length for .scomm directive")); | |
593 | ignore_rest_of_line (); | |
594 | return; | |
595 | } | |
596 | ||
597 | /* The third argument to .scomm is the alignment. */ | |
598 | if (*input_line_pointer != ',') | |
599 | align = 8; | |
600 | else | |
601 | { | |
602 | ++input_line_pointer; | |
603 | align = get_absolute_expression (); | |
604 | if (align <= 0) | |
605 | { | |
606 | as_warn (_("alignment is not a positive number")); | |
607 | align = 8; | |
608 | } | |
609 | } | |
610 | ||
611 | /* Convert to a power of 2 alignment. */ | |
612 | if (align) | |
613 | { | |
614 | for (align2 = 0; (align & 1) == 0; align >>= 1, ++align2) | |
615 | continue; | |
616 | if (align != 1) | |
617 | { | |
618 | as_bad (_("alignment is not a power of 2")); | |
619 | ignore_rest_of_line (); | |
620 | return; | |
621 | } | |
622 | } | |
623 | else | |
624 | align2 = 0; | |
625 | ||
626 | *p = 0; | |
627 | symbolP = symbol_find_or_make (name); | |
628 | *p = c; | |
629 | ||
630 | if (S_IS_DEFINED (symbolP)) | |
631 | { | |
632 | /* xgettext:c-format */ | |
633 | as_bad (_("attempt to re-define symbol `%s'"), | |
634 | S_GET_NAME (symbolP)); | |
635 | ignore_rest_of_line (); | |
636 | return; | |
637 | } | |
638 | ||
639 | if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size) | |
640 | { | |
641 | /* xgettext:c-format */ | |
642 | as_bad (_("attempt to redefine `%s' with a different length"), | |
643 | S_GET_NAME (symbolP)); | |
644 | ||
645 | ignore_rest_of_line (); | |
646 | return; | |
647 | } | |
648 | ||
649 | if (symbol_get_obj (symbolP)->local) | |
650 | { | |
651 | segT old_sec = now_seg; | |
652 | int old_subsec = now_subseg; | |
653 | char *pfrag; | |
654 | ||
655 | record_alignment (sbss_section, align2); | |
656 | subseg_set (sbss_section, 0); | |
657 | ||
658 | if (align2) | |
659 | frag_align (align2, 0, 0); | |
660 | ||
661 | if (S_GET_SEGMENT (symbolP) == sbss_section) | |
662 | symbol_get_frag (symbolP)->fr_symbol = 0; | |
663 | ||
664 | symbol_set_frag (symbolP, frag_now); | |
665 | ||
666 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size, | |
667 | (char *) 0); | |
668 | *pfrag = 0; | |
669 | S_SET_SIZE (symbolP, size); | |
670 | S_SET_SEGMENT (symbolP, sbss_section); | |
671 | S_CLEAR_EXTERNAL (symbolP); | |
672 | subseg_set (old_sec, old_subsec); | |
673 | } | |
674 | else | |
675 | { | |
676 | S_SET_VALUE (symbolP, (valueT) size); | |
677 | S_SET_ALIGN (symbolP, 1 << align2); | |
678 | S_SET_EXTERNAL (symbolP); | |
679 | S_SET_SEGMENT (symbolP, &scom_section); | |
680 | } | |
681 | ||
682 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; | |
683 | ||
684 | demand_empty_rest_of_line (); | |
685 | } | |
686 | ||
59e6276b JM |
687 | /* Track for each attribute whether it has been set explicitly (and so |
688 | should not have a default value set by the assembler). */ | |
689 | static bfd_boolean tic6x_attributes_set_explicitly[NUM_KNOWN_OBJ_ATTRIBUTES]; | |
690 | ||
691 | /* Parse a .c6xabi_attribute directive. */ | |
692 | ||
693 | static void | |
694 | s_tic6x_c6xabi_attribute (int ignored ATTRIBUTE_UNUSED) | |
695 | { | |
696 | int tag = s_vendor_attribute (OBJ_ATTR_PROC); | |
697 | ||
698 | if (tag < NUM_KNOWN_OBJ_ATTRIBUTES) | |
699 | tic6x_attributes_set_explicitly[tag] = TRUE; | |
700 | } | |
701 | ||
702 | typedef struct | |
703 | { | |
704 | const char *name; | |
705 | int tag; | |
706 | } tic6x_attribute_table; | |
707 | ||
708 | static const tic6x_attribute_table tic6x_attributes[] = | |
709 | { | |
b5593623 | 710 | #define TAG(tag, value) { #tag, tag }, |
59e6276b JM |
711 | #include "elf/tic6x-attrs.h" |
712 | #undef TAG | |
713 | }; | |
714 | ||
715 | /* Convert an attribute name to a number. */ | |
716 | ||
717 | int | |
718 | tic6x_convert_symbolic_attribute (const char *name) | |
719 | { | |
720 | unsigned int i; | |
721 | ||
722 | for (i = 0; i < ARRAY_SIZE (tic6x_attributes); i++) | |
723 | if (strcmp (name, tic6x_attributes[i].name) == 0) | |
724 | return tic6x_attributes[i].tag; | |
725 | ||
726 | return -1; | |
727 | } | |
728 | ||
40b36596 JM |
729 | const pseudo_typeS md_pseudo_table[] = |
730 | { | |
731 | { "arch", s_tic6x_arch, 0 }, | |
59e6276b | 732 | { "c6xabi_attribute", s_tic6x_c6xabi_attribute, 0 }, |
40b36596 | 733 | { "nocmp", s_tic6x_nocmp, 0 }, |
ac145307 | 734 | { "scomm", s_tic6x_scomm, 0 }, |
40b36596 | 735 | { "word", cons, 4 }, |
2fbb87f6 | 736 | { "ehtype", s_tic6x_ehtype, 0 }, |
1bce6bd8 PB |
737 | { "endp", s_tic6x_endp, 0 }, |
738 | { "handlerdata", s_tic6x_handlerdata, 0 }, | |
739 | { "personalityindex", s_tic6x_personalityindex, 0 }, | |
740 | { "personality", s_tic6x_personality, 0 }, | |
741 | { "cantunwind", s_tic6x_cantunwind, 0 }, | |
40b36596 JM |
742 | { 0, 0, 0 } |
743 | }; | |
744 | ||
745 | /* Hash table of opcodes. For each opcode name, this stores a pointer | |
746 | to a tic6x_opcode_list listing (in an arbitrary order) all opcode | |
747 | table entries with that name. */ | |
748 | static struct hash_control *opcode_hash; | |
749 | ||
750 | /* Initialize the assembler (called once at assembler startup). */ | |
751 | ||
752 | void | |
753 | md_begin (void) | |
754 | { | |
755 | tic6x_opcode_id id; | |
ac145307 BS |
756 | flagword applicable; |
757 | segT seg; | |
758 | subsegT subseg; | |
40b36596 JM |
759 | |
760 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); | |
761 | ||
762 | /* Insert opcodes into the hash table. */ | |
763 | opcode_hash = hash_new (); | |
764 | for (id = 0; id < tic6x_opcode_max; id++) | |
765 | { | |
766 | const char *errmsg; | |
767 | tic6x_opcode_list *opc = xmalloc (sizeof (tic6x_opcode_list)); | |
768 | ||
769 | opc->id = id; | |
770 | opc->next = hash_find (opcode_hash, tic6x_opcode_table[id].name); | |
771 | if ((errmsg = hash_jam (opcode_hash, tic6x_opcode_table[id].name, opc)) | |
772 | != NULL) | |
773 | as_fatal ("%s", _(errmsg)); | |
774 | } | |
ac145307 BS |
775 | |
776 | /* Save the current subseg so we can restore it [it's the default one and | |
777 | we don't want the initial section to be .sbss]. */ | |
778 | seg = now_seg; | |
779 | subseg = now_subseg; | |
780 | ||
781 | /* The sbss section is for local .scomm symbols. */ | |
782 | sbss_section = subseg_new (".bss", 0); | |
783 | seg_info (sbss_section)->bss = 1; | |
784 | ||
785 | /* This is copied from perform_an_assembly_pass. */ | |
786 | applicable = bfd_applicable_section_flags (stdoutput); | |
787 | bfd_set_section_flags (stdoutput, sbss_section, applicable & SEC_ALLOC); | |
788 | ||
789 | subseg_set (seg, subseg); | |
790 | ||
791 | /* We must construct a fake section similar to bfd_com_section | |
792 | but with the name .scommon. */ | |
793 | scom_section = bfd_com_section; | |
794 | scom_section.name = ".scommon"; | |
795 | scom_section.output_section = & scom_section; | |
796 | scom_section.symbol = & scom_symbol; | |
797 | scom_section.symbol_ptr_ptr = & scom_section.symbol; | |
798 | scom_symbol = * bfd_com_section.symbol; | |
799 | scom_symbol.name = ".scommon"; | |
800 | scom_symbol.section = & scom_section; | |
40b36596 JM |
801 | } |
802 | ||
803 | /* Whether the current line being parsed had the "||" parallel bars. */ | |
804 | static bfd_boolean tic6x_line_parallel; | |
805 | ||
806 | /* Whether the current line being parsed started "||^" to indicate an | |
807 | SPMASKed parallel instruction. */ | |
808 | static bfd_boolean tic6x_line_spmask; | |
809 | ||
810 | /* If the current line being parsed had an instruction predicate, the | |
811 | creg value for that predicate (which must be nonzero); otherwise | |
812 | 0. */ | |
813 | static unsigned int tic6x_line_creg; | |
814 | ||
815 | /* If the current line being parsed had an instruction predicate, the | |
816 | z value for that predicate; otherwise 0. */ | |
817 | static unsigned int tic6x_line_z; | |
818 | ||
819 | /* Return 1 (updating input_line_pointer as appropriate) if the line | |
820 | starting with C (immediately before input_line_pointer) starts with | |
821 | pre-opcode text appropriate for this target, 0 otherwise. */ | |
822 | ||
823 | int | |
824 | tic6x_unrecognized_line (int c) | |
825 | { | |
826 | char *p, *endp; | |
827 | unsigned int z; | |
828 | bfd_boolean areg; | |
829 | bfd_boolean bad_predicate; | |
830 | ||
831 | switch (c) | |
832 | { | |
833 | case '|': | |
834 | if (input_line_pointer[0] == '|') | |
835 | { | |
836 | if (input_line_pointer[1] == '^') | |
837 | { | |
838 | tic6x_line_spmask = TRUE; | |
839 | input_line_pointer += 2; | |
840 | } | |
841 | else | |
842 | input_line_pointer += 1; | |
843 | if (tic6x_line_parallel) | |
844 | as_bad (_("multiple '||' on same line")); | |
845 | tic6x_line_parallel = TRUE; | |
846 | if (tic6x_line_creg) | |
847 | as_bad (_("'||' after predicate")); | |
848 | return 1; | |
849 | } | |
850 | return 0; | |
851 | ||
852 | case '[': | |
853 | /* If it doesn't look like a predicate at all, just return 0. | |
854 | If it looks like one but not a valid one, give a better | |
855 | error. */ | |
856 | p = input_line_pointer; | |
857 | while (*p != ']' && !is_end_of_line[(unsigned char) *p]) | |
858 | p++; | |
859 | if (*p != ']') | |
860 | return 0; | |
861 | endp = p + 1; | |
862 | p = input_line_pointer; | |
863 | z = 0; | |
864 | bad_predicate = FALSE; | |
865 | if (*p == '!') | |
866 | { | |
867 | z = 1; | |
868 | p++; | |
869 | } | |
870 | if (*p == 'A' || *p == 'a') | |
871 | areg = TRUE; | |
872 | else if (*p == 'B' || *p == 'b') | |
873 | areg = FALSE; | |
874 | else | |
875 | { | |
876 | areg = TRUE; /* Avoid uninitialized warning. */ | |
877 | bad_predicate = TRUE; | |
878 | } | |
879 | if (!bad_predicate) | |
880 | { | |
881 | p++; | |
882 | if (*p != '0' && *p != '1' && *p != '2') | |
883 | bad_predicate = TRUE; | |
884 | else if (p[1] != ']') | |
885 | bad_predicate = TRUE; | |
886 | else | |
887 | input_line_pointer = p + 2; | |
888 | } | |
889 | ||
890 | if (tic6x_line_creg) | |
891 | as_bad (_("multiple predicates on same line")); | |
892 | ||
893 | if (bad_predicate) | |
894 | { | |
895 | char ctmp = *endp; | |
896 | *endp = 0; | |
897 | as_bad (_("bad predicate '%s'"), input_line_pointer - 1); | |
898 | *endp = ctmp; | |
899 | input_line_pointer = endp; | |
900 | return 1; | |
901 | } | |
902 | ||
903 | switch (*p) | |
904 | { | |
905 | case '0': | |
906 | tic6x_line_creg = (areg ? 6 : 1); | |
907 | if (areg && !tic6x_predicate_a0) | |
908 | as_bad (_("predication on A0 not supported on this architecture")); | |
909 | break; | |
910 | ||
911 | case '1': | |
912 | tic6x_line_creg = (areg ? 4 : 2); | |
913 | break; | |
914 | ||
915 | case '2': | |
916 | tic6x_line_creg = (areg ? 5 : 3); | |
917 | break; | |
918 | ||
919 | default: | |
920 | abort (); | |
921 | } | |
922 | ||
923 | tic6x_line_z = z; | |
924 | return 1; | |
925 | ||
926 | default: | |
927 | return 0; | |
928 | } | |
929 | } | |
930 | ||
931 | /* Do any target-specific handling of a label required. */ | |
932 | ||
933 | void | |
d99e5b39 | 934 | tic6x_frob_label (symbolS *sym) |
40b36596 | 935 | { |
d99e5b39 JM |
936 | segment_info_type *si; |
937 | tic6x_label_list *list; | |
938 | ||
40b36596 JM |
939 | if (tic6x_line_parallel) |
940 | { | |
941 | as_bad (_("label after '||'")); | |
942 | tic6x_line_parallel = FALSE; | |
943 | tic6x_line_spmask = FALSE; | |
944 | } | |
945 | if (tic6x_line_creg) | |
946 | { | |
947 | as_bad (_("label after predicate")); | |
948 | tic6x_line_creg = 0; | |
949 | tic6x_line_z = 0; | |
950 | } | |
951 | ||
d99e5b39 JM |
952 | si = seg_info (now_seg); |
953 | list = si->tc_segment_info_data.label_list; | |
954 | si->tc_segment_info_data.label_list = xmalloc (sizeof (tic6x_label_list)); | |
955 | si->tc_segment_info_data.label_list->next = list; | |
956 | si->tc_segment_info_data.label_list->label = sym; | |
40b36596 JM |
957 | |
958 | /* Defining tc_frob_label overrides the ELF definition of | |
959 | obj_frob_label, so we need to apply its effects here. */ | |
960 | dwarf2_emit_label (sym); | |
961 | } | |
962 | ||
963 | /* At end-of-line, give errors for start-of-line decorations that | |
964 | needed an instruction but were not followed by one. */ | |
965 | ||
966 | static void | |
967 | tic6x_end_of_line (void) | |
968 | { | |
969 | if (tic6x_line_parallel) | |
970 | { | |
971 | as_bad (_("'||' not followed by instruction")); | |
972 | tic6x_line_parallel = FALSE; | |
973 | tic6x_line_spmask = FALSE; | |
974 | } | |
975 | if (tic6x_line_creg) | |
976 | { | |
977 | as_bad (_("predicate not followed by instruction")); | |
978 | tic6x_line_creg = 0; | |
979 | tic6x_line_z = 0; | |
980 | } | |
981 | } | |
982 | ||
983 | /* Do any target-specific handling of the start of a logical line. */ | |
984 | ||
985 | void | |
986 | tic6x_start_line_hook (void) | |
987 | { | |
988 | tic6x_end_of_line (); | |
989 | } | |
990 | ||
d99e5b39 JM |
991 | /* Do target-specific handling immediately after an input file from |
992 | the command line, and any other inputs it includes, have been | |
993 | read. */ | |
40b36596 JM |
994 | |
995 | void | |
996 | tic6x_cleanup (void) | |
997 | { | |
998 | tic6x_end_of_line (); | |
999 | } | |
1000 | ||
41820509 JM |
1001 | /* Do target-specific initialization after arguments have been |
1002 | processed and the output file created. */ | |
1003 | ||
1004 | void | |
1005 | tic6x_init_after_args (void) | |
1006 | { | |
1007 | elf32_tic6x_set_use_rela_p (stdoutput, tic6x_generate_rela); | |
1008 | } | |
1009 | ||
d99e5b39 JM |
1010 | /* Free LIST of labels (possibly NULL). */ |
1011 | ||
1012 | static void | |
1013 | tic6x_free_label_list (tic6x_label_list *list) | |
1014 | { | |
1015 | while (list) | |
1016 | { | |
1017 | tic6x_label_list *old = list; | |
1018 | ||
1019 | list = list->next; | |
1020 | free (old); | |
1021 | } | |
1022 | } | |
1023 | ||
40b36596 JM |
1024 | /* Handle a data alignment of N bytes. */ |
1025 | ||
1026 | void | |
1027 | tic6x_cons_align (int n ATTRIBUTE_UNUSED) | |
1028 | { | |
1029 | segment_info_type *seginfo = seg_info (now_seg); | |
1030 | ||
1031 | /* Data means there is no current execute packet, and that any label | |
1032 | applies to that data rather than a subsequent instruction. */ | |
d99e5b39 JM |
1033 | tic6x_free_label_list (seginfo->tc_segment_info_data.label_list); |
1034 | seginfo->tc_segment_info_data.label_list = NULL; | |
1035 | seginfo->tc_segment_info_data.execute_packet_frag = NULL; | |
40b36596 JM |
1036 | seginfo->tc_segment_info_data.last_insn_lsb = NULL; |
1037 | seginfo->tc_segment_info_data.spmask_addr = NULL; | |
38bd8d09 | 1038 | seginfo->tc_segment_info_data.func_units_used = 0; |
40b36596 JM |
1039 | } |
1040 | ||
d99e5b39 JM |
1041 | /* Handle an alignment directive. Return TRUE if the |
1042 | machine-independent frag generation should be skipped. */ | |
1043 | ||
1044 | bfd_boolean | |
1045 | tic6x_do_align (int n, char *fill, int len ATTRIBUTE_UNUSED, int max) | |
1046 | { | |
1047 | /* Given code alignments of 4, 8, 16 or 32 bytes, we try to handle | |
1048 | them in the md_end pass by inserting NOPs in parallel with | |
1049 | previous instructions. We only do this in sections containing | |
1050 | nothing but instructions. Code alignments of 1 or 2 bytes have | |
1051 | no effect in such sections (but we record them with | |
1052 | machine-dependent frags anyway so they can be skipped or | |
1053 | converted to machine-independent), while those of more than 64 | |
1054 | bytes cannot reliably be handled in this way. */ | |
1055 | if (n > 0 | |
1056 | && max >= 0 | |
1057 | && max < (1 << n) | |
1058 | && !need_pass_2 | |
1059 | && fill == NULL | |
1060 | && subseg_text_p (now_seg)) | |
1061 | { | |
1062 | fragS *align_frag; | |
1063 | char *p; | |
1064 | ||
1065 | if (n > 5) | |
1066 | return FALSE; | |
1067 | ||
1068 | /* Machine-independent code would generate a frag here, but we | |
1069 | wish to handle it in a machine-dependent way. */ | |
1070 | if (frag_now_fix () != 0) | |
1071 | { | |
1072 | if (frag_now->fr_type != rs_machine_dependent) | |
1073 | frag_wane (frag_now); | |
1074 | ||
1075 | frag_new (0); | |
1076 | } | |
1077 | frag_grow (32); | |
1078 | align_frag = frag_now; | |
1079 | p = frag_var (rs_machine_dependent, 32, 32, max, NULL, n, NULL); | |
1080 | /* This must be the same as the frag to which a pointer was just | |
1081 | saved. */ | |
1082 | if (p != align_frag->fr_literal) | |
1083 | abort (); | |
1084 | align_frag->tc_frag_data.is_insns = FALSE; | |
1085 | return TRUE; | |
1086 | } | |
1087 | else | |
1088 | return FALSE; | |
1089 | } | |
1090 | ||
40b36596 JM |
1091 | /* Types of operand for parsing purposes. These are used as bit-masks |
1092 | to tell tic6x_parse_operand what forms of operand are | |
1093 | permitted. */ | |
1094 | #define TIC6X_OP_EXP 0x0001u | |
1095 | #define TIC6X_OP_REG 0x0002u | |
1096 | #define TIC6X_OP_REGPAIR 0x0004u | |
1097 | #define TIC6X_OP_IRP 0x0008u | |
1098 | #define TIC6X_OP_NRP 0x0010u | |
1099 | /* With TIC6X_OP_MEM_NOUNREG, the contents of a () offset are always | |
1100 | interpreted as an expression, which may be a symbol with the same | |
1101 | name as a register that ends up being implicitly DP-relative. With | |
1102 | TIC6X_OP_MEM_UNREG, the contents of a () offset are interpreted as | |
1103 | a register if they match one, and failing that as an expression, | |
1104 | which must be constant. */ | |
1105 | #define TIC6X_OP_MEM_NOUNREG 0x0020u | |
1106 | #define TIC6X_OP_MEM_UNREG 0x0040u | |
1107 | #define TIC6X_OP_CTRL 0x0080u | |
1108 | #define TIC6X_OP_FUNC_UNIT 0x0100u | |
1109 | ||
1110 | /* A register or register pair read by the assembler. */ | |
1111 | typedef struct | |
1112 | { | |
1113 | /* The side the register is on (1 or 2). */ | |
1114 | unsigned int side; | |
1115 | /* The register number (0 to 31). */ | |
1116 | unsigned int num; | |
1117 | } tic6x_register; | |
1118 | ||
1119 | /* Types of modification of a base address. */ | |
1120 | typedef enum | |
1121 | { | |
1122 | tic6x_mem_mod_none, | |
1123 | tic6x_mem_mod_plus, | |
1124 | tic6x_mem_mod_minus, | |
1125 | tic6x_mem_mod_preinc, | |
1126 | tic6x_mem_mod_predec, | |
1127 | tic6x_mem_mod_postinc, | |
1128 | tic6x_mem_mod_postdec | |
1129 | } tic6x_mem_mod; | |
1130 | ||
1131 | /* Scaled [] or unscaled () nature of an offset. */ | |
1132 | typedef enum | |
1133 | { | |
1134 | tic6x_offset_none, | |
1135 | tic6x_offset_scaled, | |
1136 | tic6x_offset_unscaled | |
1137 | } tic6x_mem_scaling; | |
1138 | ||
1139 | /* A memory operand read by the assembler. */ | |
1140 | typedef struct | |
1141 | { | |
1142 | /* The base register. */ | |
1143 | tic6x_register base_reg; | |
1144 | /* How the base register is modified. */ | |
1145 | tic6x_mem_mod mod; | |
1146 | /* Whether there is an offset (required with plain "+" and "-"), and | |
1147 | whether it is scaled or unscaled if so. */ | |
1148 | tic6x_mem_scaling scaled; | |
1149 | /* Whether the offset is a register (TRUE) or an expression | |
1150 | (FALSE). */ | |
1151 | bfd_boolean offset_is_reg; | |
1152 | /* The offset. */ | |
1153 | union | |
1154 | { | |
1155 | expressionS exp; | |
1156 | tic6x_register reg; | |
1157 | } offset; | |
1158 | } tic6x_mem_ref; | |
1159 | ||
1160 | /* A functional unit in SPMASK operands read by the assembler. */ | |
1161 | typedef struct | |
1162 | { | |
1163 | /* The basic unit. */ | |
1164 | tic6x_func_unit_base base; | |
1165 | /* The side (1 or 2). */ | |
1166 | unsigned int side; | |
1167 | } tic6x_func_unit_operand; | |
1168 | ||
1169 | /* An operand read by the assembler. */ | |
1170 | typedef struct | |
1171 | { | |
1172 | /* The syntactic form of the operand, as one of the bit-masks | |
1173 | above. */ | |
1174 | unsigned int form; | |
1175 | /* The operand value. */ | |
1176 | union | |
1177 | { | |
1178 | /* An expression: TIC6X_OP_EXP. */ | |
1179 | expressionS exp; | |
1180 | /* A register: TIC6X_OP_REG, TIC6X_OP_REGPAIR. */ | |
1181 | tic6x_register reg; | |
1182 | /* A memory reference: TIC6X_OP_MEM_NOUNREG, | |
1183 | TIC6X_OP_MEM_UNREG. */ | |
1184 | tic6x_mem_ref mem; | |
1185 | /* A control register: TIC6X_OP_CTRL. */ | |
1186 | tic6x_ctrl_id ctrl; | |
1187 | /* A functional unit: TIC6X_OP_FUNC_UNIT. */ | |
1188 | tic6x_func_unit_operand func_unit; | |
1189 | } value; | |
1190 | } tic6x_operand; | |
1191 | ||
1192 | #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0) | |
1193 | ||
1194 | /* Parse a register operand, or part of an operand, starting at *P. | |
1195 | If syntactically OK (including that the number is in the range 0 to | |
1196 | 31, but not necessarily in range for this architecture), return | |
1197 | TRUE, putting the register side and number in *REG and update *P to | |
1198 | point immediately after the register number; otherwise return FALSE | |
1199 | without changing *P (but possibly changing *REG). Do not print any | |
1200 | diagnostics. */ | |
1201 | ||
1202 | static bfd_boolean | |
1203 | tic6x_parse_register (char **p, tic6x_register *reg) | |
1204 | { | |
1205 | char *r = *p; | |
1206 | ||
1207 | switch (*r) | |
1208 | { | |
1209 | case 'a': | |
1210 | case 'A': | |
1211 | reg->side = 1; | |
1212 | break; | |
1213 | ||
1214 | case 'b': | |
1215 | case 'B': | |
1216 | reg->side = 2; | |
1217 | break; | |
1218 | ||
1219 | default: | |
1220 | return FALSE; | |
1221 | } | |
1222 | r++; | |
1223 | ||
1224 | if (*r >= '0' && *r <= '9') | |
1225 | { | |
1226 | reg->num = *r - '0'; | |
1227 | r++; | |
1228 | } | |
1229 | else | |
1230 | return FALSE; | |
1231 | ||
1232 | if (reg->num > 0 && *r >= '0' && *r <= '9') | |
1233 | { | |
1234 | reg->num = reg->num * 10 + (*r - '0'); | |
1235 | r++; | |
1236 | } | |
1237 | ||
1238 | if (*r >= '0' && *r <= '9') | |
1239 | return FALSE; | |
1240 | ||
1241 | if (reg->num >= 32) | |
1242 | return FALSE; | |
1243 | *p = r; | |
1244 | return TRUE; | |
1245 | } | |
1246 | ||
1247 | /* Parse the initial two characters of a functional unit name starting | |
1248 | at *P. If OK, set *BASE and *SIDE and return TRUE; otherwise, | |
1249 | return FALSE. */ | |
1250 | ||
1251 | static bfd_boolean | |
1252 | tic6x_parse_func_unit_base (char *p, tic6x_func_unit_base *base, | |
1253 | unsigned int *side) | |
1254 | { | |
1255 | bfd_boolean good_func_unit = TRUE; | |
1256 | tic6x_func_unit_base maybe_base = tic6x_func_unit_nfu; | |
1257 | unsigned int maybe_side = 0; | |
1258 | ||
1259 | switch (p[0]) | |
1260 | { | |
1261 | case 'd': | |
1262 | case 'D': | |
1263 | maybe_base = tic6x_func_unit_d; | |
1264 | break; | |
1265 | ||
1266 | case 'l': | |
1267 | case 'L': | |
1268 | maybe_base = tic6x_func_unit_l; | |
1269 | break; | |
1270 | ||
1271 | case 'm': | |
1272 | case 'M': | |
1273 | maybe_base = tic6x_func_unit_m; | |
1274 | break; | |
1275 | ||
1276 | case 's': | |
1277 | case 'S': | |
1278 | maybe_base = tic6x_func_unit_s; | |
1279 | break; | |
1280 | ||
1281 | default: | |
1282 | good_func_unit = FALSE; | |
1283 | break; | |
1284 | } | |
1285 | ||
1286 | if (good_func_unit) | |
1287 | switch (p[1]) | |
1288 | { | |
1289 | case '1': | |
1290 | maybe_side = 1; | |
1291 | break; | |
1292 | ||
1293 | case '2': | |
1294 | maybe_side = 2; | |
1295 | break; | |
1296 | ||
1297 | default: | |
1298 | good_func_unit = FALSE; | |
1299 | break; | |
1300 | } | |
1301 | ||
1302 | if (good_func_unit) | |
1303 | { | |
1304 | *base = maybe_base; | |
1305 | *side = maybe_side; | |
1306 | } | |
1307 | ||
1308 | return good_func_unit; | |
1309 | } | |
1310 | ||
1311 | /* Parse an operand starting at *P. If the operand parses OK, return | |
1312 | TRUE and store the value in *OP; otherwise return FALSE (possibly | |
1313 | changing *OP). In any case, update *P to point to the following | |
1314 | comma or end of line. The possible operand forms are given by | |
1315 | OP_FORMS. For diagnostics, this is operand OPNO of an opcode | |
1316 | starting at STR, length OPC_LEN. */ | |
1317 | ||
1318 | static bfd_boolean | |
1319 | tic6x_parse_operand (char **p, tic6x_operand *op, unsigned int op_forms, | |
1320 | char *str, int opc_len, unsigned int opno) | |
1321 | { | |
1322 | bfd_boolean operand_parsed = FALSE; | |
1323 | char *q = *p; | |
1324 | ||
1325 | if ((op_forms & (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG)) | |
1326 | == (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG)) | |
1327 | abort (); | |
1328 | ||
1329 | /* Check for functional unit names for SPMASK and SPMASKR. */ | |
1330 | if (!operand_parsed && (op_forms & TIC6X_OP_FUNC_UNIT)) | |
1331 | { | |
1332 | tic6x_func_unit_base base = tic6x_func_unit_nfu; | |
1333 | unsigned int side = 0; | |
1334 | ||
1335 | if (tic6x_parse_func_unit_base (q, &base, &side)) | |
1336 | { | |
1337 | char *rq = q + 2; | |
1338 | ||
1339 | skip_whitespace (rq); | |
1340 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1341 | { | |
1342 | op->form = TIC6X_OP_FUNC_UNIT; | |
1343 | op->value.func_unit.base = base; | |
1344 | op->value.func_unit.side = side; | |
1345 | operand_parsed = TRUE; | |
1346 | q = rq; | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | /* Check for literal "irp". */ | |
1352 | if (!operand_parsed && (op_forms & TIC6X_OP_IRP)) | |
1353 | { | |
1354 | if ((q[0] == 'i' || q[0] == 'I') | |
1355 | && (q[1] == 'r' || q[1] == 'R') | |
1356 | && (q[2] == 'p' || q[2] == 'P')) | |
1357 | { | |
1358 | char *rq = q + 3; | |
1359 | ||
1360 | skip_whitespace (rq); | |
1361 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1362 | { | |
1363 | op->form = TIC6X_OP_IRP; | |
1364 | operand_parsed = TRUE; | |
1365 | q = rq; | |
1366 | } | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | /* Check for literal "nrp". */ | |
1371 | if (!operand_parsed && (op_forms & TIC6X_OP_NRP)) | |
1372 | { | |
1373 | if ((q[0] == 'n' || q[0] == 'N') | |
1374 | && (q[1] == 'r' || q[1] == 'R') | |
1375 | && (q[2] == 'p' || q[2] == 'P')) | |
1376 | { | |
1377 | char *rq = q + 3; | |
1378 | ||
1379 | skip_whitespace (rq); | |
1380 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1381 | { | |
1382 | op->form = TIC6X_OP_NRP; | |
1383 | operand_parsed = TRUE; | |
1384 | q = rq; | |
1385 | } | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | /* Check for control register names. */ | |
1390 | if (!operand_parsed && (op_forms & TIC6X_OP_CTRL)) | |
1391 | { | |
1392 | tic6x_ctrl_id crid; | |
1393 | ||
1394 | for (crid = 0; crid < tic6x_ctrl_max; crid++) | |
1395 | { | |
1396 | size_t len = strlen (tic6x_ctrl_table[crid].name); | |
1397 | ||
1398 | if (strncasecmp (tic6x_ctrl_table[crid].name, q, len) == 0) | |
1399 | { | |
1400 | char *rq = q + len; | |
1401 | ||
1402 | skip_whitespace (rq); | |
1403 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1404 | { | |
1405 | op->form = TIC6X_OP_CTRL; | |
1406 | op->value.ctrl = crid; | |
1407 | operand_parsed = TRUE; | |
1408 | q = rq; | |
1409 | if (!(tic6x_ctrl_table[crid].isa_variants & tic6x_features)) | |
1410 | as_bad (_("control register '%s' not supported " | |
1411 | "on this architecture"), | |
1412 | tic6x_ctrl_table[crid].name); | |
1413 | } | |
1414 | } | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | /* See if this looks like a memory reference. */ | |
1419 | if (!operand_parsed | |
1420 | && (op_forms & (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG))) | |
1421 | { | |
1422 | bfd_boolean mem_ok = TRUE; | |
1423 | char *mq = q; | |
1424 | tic6x_mem_mod mem_mod = tic6x_mem_mod_none; | |
1425 | tic6x_register base_reg; | |
1426 | bfd_boolean require_offset, permit_offset; | |
1427 | tic6x_mem_scaling scaled; | |
1428 | bfd_boolean offset_is_reg; | |
1429 | expressionS offset_exp; | |
1430 | tic6x_register offset_reg; | |
1431 | ||
1432 | if (*mq == '*') | |
1433 | mq++; | |
1434 | else | |
1435 | mem_ok = FALSE; | |
1436 | ||
1437 | if (mem_ok) | |
1438 | { | |
1439 | skip_whitespace (mq); | |
1440 | switch (*mq) | |
1441 | { | |
1442 | case '+': | |
1443 | if (mq[1] == '+') | |
1444 | { | |
1445 | mem_mod = tic6x_mem_mod_preinc; | |
1446 | mq += 2; | |
1447 | } | |
1448 | else | |
1449 | { | |
1450 | mem_mod = tic6x_mem_mod_plus; | |
1451 | mq++; | |
1452 | } | |
1453 | break; | |
1454 | ||
1455 | case '-': | |
1456 | if (mq[1] == '-') | |
1457 | { | |
1458 | mem_mod = tic6x_mem_mod_predec; | |
1459 | mq += 2; | |
1460 | } | |
1461 | else | |
1462 | { | |
1463 | mem_mod = tic6x_mem_mod_minus; | |
1464 | mq++; | |
1465 | } | |
1466 | break; | |
1467 | ||
1468 | default: | |
1469 | break; | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | if (mem_ok) | |
1474 | { | |
1475 | skip_whitespace (mq); | |
1476 | mem_ok = tic6x_parse_register (&mq, &base_reg); | |
1477 | } | |
1478 | ||
1479 | if (mem_ok && mem_mod == tic6x_mem_mod_none) | |
1480 | { | |
1481 | skip_whitespace (mq); | |
1482 | if (mq[0] == '+' && mq[1] == '+') | |
1483 | { | |
1484 | mem_mod = tic6x_mem_mod_postinc; | |
1485 | mq += 2; | |
1486 | } | |
1487 | else if (mq[0] == '-' && mq[1] == '-') | |
1488 | { | |
1489 | mem_mod = tic6x_mem_mod_postdec; | |
1490 | mq += 2; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | if (mem_mod == tic6x_mem_mod_none) | |
1495 | permit_offset = FALSE; | |
1496 | else | |
1497 | permit_offset = TRUE; | |
1498 | if (mem_mod == tic6x_mem_mod_plus || mem_mod == tic6x_mem_mod_minus) | |
1499 | require_offset = TRUE; | |
1500 | else | |
1501 | require_offset = FALSE; | |
1502 | scaled = tic6x_offset_none; | |
1503 | offset_is_reg = FALSE; | |
1504 | ||
1505 | if (mem_ok && permit_offset) | |
1506 | { | |
1507 | char endc = 0; | |
1508 | ||
1509 | skip_whitespace (mq); | |
1510 | switch (*mq) | |
1511 | { | |
1512 | case '[': | |
1513 | scaled = tic6x_offset_scaled; | |
1514 | mq++; | |
1515 | endc = ']'; | |
1516 | break; | |
1517 | ||
1518 | case '(': | |
1519 | scaled = tic6x_offset_unscaled; | |
1520 | mq++; | |
1521 | endc = ')'; | |
1522 | break; | |
1523 | ||
1524 | default: | |
1525 | break; | |
1526 | } | |
1527 | if (scaled != tic6x_offset_none) | |
1528 | { | |
1529 | skip_whitespace (mq); | |
1530 | if (scaled == tic6x_offset_scaled | |
1531 | || (op_forms & TIC6X_OP_MEM_UNREG)) | |
1532 | { | |
1533 | bfd_boolean reg_ok; | |
1534 | char *rq = mq; | |
1535 | ||
1536 | reg_ok = tic6x_parse_register (&rq, &offset_reg); | |
1537 | if (reg_ok) | |
1538 | { | |
1539 | skip_whitespace (rq); | |
1540 | if (*rq == endc) | |
1541 | { | |
1542 | mq = rq; | |
1543 | offset_is_reg = TRUE; | |
1544 | } | |
1545 | } | |
1546 | } | |
1547 | if (!offset_is_reg) | |
1548 | { | |
1549 | char *save_input_line_pointer; | |
1550 | ||
1551 | save_input_line_pointer = input_line_pointer; | |
1552 | input_line_pointer = mq; | |
1553 | expression (&offset_exp); | |
1554 | mq = input_line_pointer; | |
1555 | input_line_pointer = save_input_line_pointer; | |
1556 | } | |
1557 | skip_whitespace (mq); | |
1558 | if (*mq == endc) | |
1559 | mq++; | |
1560 | else | |
1561 | mem_ok = FALSE; | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | if (mem_ok && require_offset && scaled == tic6x_offset_none) | |
1566 | mem_ok = FALSE; | |
1567 | ||
1568 | if (mem_ok) | |
1569 | { | |
1570 | skip_whitespace (mq); | |
1571 | if (!is_end_of_line[(unsigned char) *mq] && *mq != ',') | |
1572 | mem_ok = FALSE; | |
1573 | } | |
1574 | ||
1575 | if (mem_ok) | |
1576 | { | |
1577 | op->form = op_forms & (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG); | |
1578 | op->value.mem.base_reg = base_reg; | |
1579 | op->value.mem.mod = mem_mod; | |
1580 | op->value.mem.scaled = scaled; | |
1581 | op->value.mem.offset_is_reg = offset_is_reg; | |
1582 | if (offset_is_reg) | |
1583 | op->value.mem.offset.reg = offset_reg; | |
1584 | else | |
1585 | op->value.mem.offset.exp = offset_exp; | |
1586 | operand_parsed = TRUE; | |
1587 | q = mq; | |
1588 | if (base_reg.num >= tic6x_num_registers) | |
1589 | as_bad (_("register number %u not supported on this architecture"), | |
1590 | base_reg.num); | |
1591 | if (offset_is_reg && offset_reg.num >= tic6x_num_registers) | |
1592 | as_bad (_("register number %u not supported on this architecture"), | |
1593 | offset_reg.num); | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | /* See if this looks like a register or register pair. */ | |
1598 | if (!operand_parsed && (op_forms & (TIC6X_OP_REG | TIC6X_OP_REGPAIR))) | |
1599 | { | |
1600 | tic6x_register first_reg, second_reg; | |
1601 | bfd_boolean reg_ok; | |
1602 | char *rq = q; | |
1603 | ||
1604 | reg_ok = tic6x_parse_register (&rq, &first_reg); | |
1605 | ||
1606 | if (reg_ok) | |
1607 | { | |
1608 | if (*rq == ':' && (op_forms & TIC6X_OP_REGPAIR)) | |
1609 | { | |
1610 | rq++; | |
1611 | reg_ok = tic6x_parse_register (&rq, &second_reg); | |
1612 | if (reg_ok) | |
1613 | { | |
1614 | skip_whitespace (rq); | |
1615 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1616 | { | |
1617 | if ((second_reg.num & 1) | |
1618 | || (first_reg.num != second_reg.num + 1) | |
1619 | || (first_reg.side != second_reg.side)) | |
1620 | as_bad (_("register pair for operand %u of '%.*s'" | |
1621 | " not a valid even/odd pair"), opno, | |
1622 | opc_len, str); | |
1623 | op->form = TIC6X_OP_REGPAIR; | |
1624 | op->value.reg = second_reg; | |
1625 | operand_parsed = TRUE; | |
1626 | q = rq; | |
1627 | } | |
1628 | } | |
1629 | } | |
1630 | else if (op_forms & TIC6X_OP_REG) | |
1631 | { | |
1632 | skip_whitespace (rq); | |
1633 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1634 | { | |
1635 | op->form = TIC6X_OP_REG; | |
1636 | op->value.reg = first_reg; | |
1637 | operand_parsed = TRUE; | |
1638 | q = rq; | |
1639 | } | |
1640 | } | |
1641 | } | |
1642 | if (operand_parsed) | |
1643 | { | |
1644 | if (first_reg.num >= tic6x_num_registers) | |
1645 | as_bad (_("register number %u not supported on this architecture"), | |
1646 | first_reg.num); | |
1647 | if (op->form == TIC6X_OP_REGPAIR | |
1648 | && second_reg.num >= tic6x_num_registers) | |
1649 | as_bad (_("register number %u not supported on this architecture"), | |
1650 | second_reg.num); | |
1651 | } | |
1652 | } | |
1653 | ||
1654 | /* Otherwise, parse it as an expression. */ | |
1655 | if (!operand_parsed && (op_forms & TIC6X_OP_EXP)) | |
1656 | { | |
1657 | char *save_input_line_pointer; | |
1658 | ||
1659 | save_input_line_pointer = input_line_pointer; | |
1660 | input_line_pointer = q; | |
1661 | op->form = TIC6X_OP_EXP; | |
1662 | expression (&op->value.exp); | |
1663 | q = input_line_pointer; | |
1664 | input_line_pointer = save_input_line_pointer; | |
1665 | operand_parsed = TRUE; | |
1666 | } | |
1667 | ||
1668 | if (operand_parsed) | |
1669 | { | |
1670 | /* Now the operand has been parsed, there must be nothing more | |
1671 | before the comma or end of line. */ | |
1672 | skip_whitespace (q); | |
1673 | if (!is_end_of_line[(unsigned char) *q] && *q != ',') | |
1674 | { | |
1675 | operand_parsed = FALSE; | |
1676 | as_bad (_("junk after operand %u of '%.*s'"), opno, | |
1677 | opc_len, str); | |
1678 | while (!is_end_of_line[(unsigned char) *q] && *q != ',') | |
1679 | q++; | |
1680 | } | |
1681 | } | |
1682 | else | |
1683 | { | |
1684 | /* This could not be parsed as any acceptable form of | |
1685 | operand. */ | |
1686 | switch (op_forms) | |
1687 | { | |
1688 | case TIC6X_OP_REG | TIC6X_OP_REGPAIR: | |
1689 | as_bad (_("bad register or register pair for operand %u of '%.*s'"), | |
1690 | opno, opc_len, str); | |
1691 | break; | |
1692 | ||
1693 | case TIC6X_OP_REG | TIC6X_OP_CTRL: | |
1694 | case TIC6X_OP_REG: | |
1695 | as_bad (_("bad register for operand %u of '%.*s'"), | |
1696 | opno, opc_len, str); | |
1697 | break; | |
1698 | ||
1699 | case TIC6X_OP_REGPAIR: | |
1700 | as_bad (_("bad register pair for operand %u of '%.*s'"), | |
1701 | opno, opc_len, str); | |
1702 | break; | |
1703 | ||
1704 | case TIC6X_OP_FUNC_UNIT: | |
1705 | as_bad (_("bad functional unit for operand %u of '%.*s'"), | |
1706 | opno, opc_len, str); | |
1707 | break; | |
1708 | ||
1709 | default: | |
1710 | as_bad (_("bad operand %u of '%.*s'"), | |
1711 | opno, opc_len, str); | |
1712 | break; | |
1713 | ||
1714 | } | |
1715 | while (!is_end_of_line[(unsigned char) *q] && *q != ',') | |
1716 | q++; | |
1717 | } | |
1718 | *p = q; | |
1719 | return operand_parsed; | |
1720 | } | |
1721 | ||
1722 | /* Table of assembler operators and associated O_* values. */ | |
1723 | typedef struct | |
1724 | { | |
1725 | const char *name; | |
1726 | operatorT op; | |
1727 | } tic6x_operator_table; | |
1728 | static const tic6x_operator_table tic6x_operators[] = { | |
1729 | #define O_dsbt_index O_md1 | |
1730 | { "dsbt_index", O_dsbt_index }, | |
1731 | #define O_got O_md2 | |
1732 | { "got", O_got }, | |
1733 | #define O_dpr_got O_md3 | |
1734 | { "dpr_got", O_dpr_got }, | |
1735 | #define O_dpr_byte O_md4 | |
1736 | { "dpr_byte", O_dpr_byte }, | |
1737 | #define O_dpr_hword O_md5 | |
1738 | { "dpr_hword", O_dpr_hword }, | |
1739 | #define O_dpr_word O_md6 | |
1740 | { "dpr_word", O_dpr_word }, | |
4a732032 BS |
1741 | #define O_pcr_offset O_md7 |
1742 | { "pcr_offset", O_pcr_offset } | |
40b36596 JM |
1743 | }; |
1744 | ||
1745 | /* Parse a name in some machine-specific way. Used on C6X to handle | |
1746 | assembler operators. */ | |
1747 | ||
1748 | int | |
1749 | tic6x_parse_name (const char *name, expressionS *exprP, | |
1750 | enum expr_mode mode ATTRIBUTE_UNUSED, char *nextchar) | |
1751 | { | |
1752 | char *p = input_line_pointer; | |
1753 | char c, *name_start, *name_end; | |
1754 | const char *inner_name; | |
1755 | unsigned int i; | |
1756 | operatorT op = O_illegal; | |
4a732032 | 1757 | symbolS *sym, *op_sym = NULL; |
40b36596 JM |
1758 | |
1759 | if (*name != '$') | |
1760 | return 0; | |
1761 | ||
1762 | for (i = 0; i < ARRAY_SIZE (tic6x_operators); i++) | |
1763 | if (strcasecmp (name + 1, tic6x_operators[i].name) == 0) | |
1764 | { | |
1765 | op = tic6x_operators[i].op; | |
1766 | break; | |
1767 | } | |
1768 | ||
1769 | if (op == O_illegal) | |
1770 | return 0; | |
1771 | ||
1772 | *input_line_pointer = *nextchar; | |
1773 | skip_whitespace (p); | |
1774 | ||
1775 | if (*p != '(') | |
1776 | { | |
1777 | *input_line_pointer = 0; | |
1778 | return 0; | |
1779 | } | |
1780 | p++; | |
1781 | skip_whitespace (p); | |
1782 | ||
1783 | if (!is_name_beginner (*p)) | |
1784 | { | |
1785 | *input_line_pointer = 0; | |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | name_start = p; | |
1790 | p++; | |
1791 | while (is_part_of_name (*p)) | |
1792 | p++; | |
1793 | name_end = p; | |
1794 | skip_whitespace (p); | |
1795 | ||
4a732032 BS |
1796 | if (op == O_pcr_offset) |
1797 | { | |
1798 | char *op_name_start, *op_name_end; | |
1799 | ||
1800 | if (*p != ',') | |
1801 | { | |
1802 | *input_line_pointer = 0; | |
1803 | return 0; | |
1804 | } | |
1805 | p++; | |
1806 | skip_whitespace (p); | |
1807 | ||
1808 | if (!is_name_beginner (*p)) | |
1809 | { | |
1810 | *input_line_pointer = 0; | |
1811 | return 0; | |
1812 | } | |
1813 | ||
1814 | op_name_start = p; | |
1815 | p++; | |
1816 | while (is_part_of_name (*p)) | |
1817 | p++; | |
1818 | op_name_end = p; | |
1819 | skip_whitespace (p); | |
1820 | ||
1821 | c = *op_name_end; | |
1822 | *op_name_end = 0; | |
1823 | op_sym = symbol_find_or_make (op_name_start); | |
1824 | *op_name_end = c; | |
1825 | } | |
1826 | ||
40b36596 JM |
1827 | if (*p != ')') |
1828 | { | |
1829 | *input_line_pointer = 0; | |
1830 | return 0; | |
1831 | } | |
1832 | ||
1833 | input_line_pointer = p + 1; | |
1834 | *nextchar = *input_line_pointer; | |
1835 | *input_line_pointer = 0; | |
1836 | ||
1837 | c = *name_end; | |
1838 | *name_end = 0; | |
1839 | inner_name = name_start; | |
1840 | if (op == O_dsbt_index && strcmp (inner_name, "__c6xabi_DSBT_BASE") != 0) | |
1841 | { | |
1842 | as_bad (_("$DSBT_INDEX must be used with __c6xabi_DSBT_BASE")); | |
1843 | inner_name = "__c6xabi_DSBT_BASE"; | |
1844 | } | |
1845 | sym = symbol_find_or_make (inner_name); | |
1846 | *name_end = c; | |
1847 | ||
1848 | exprP->X_op = op; | |
1849 | exprP->X_add_symbol = sym; | |
1850 | exprP->X_add_number = 0; | |
4a732032 | 1851 | exprP->X_op_symbol = op_sym; |
40b36596 JM |
1852 | exprP->X_md = 0; |
1853 | ||
1854 | return 1; | |
1855 | } | |
1856 | ||
1857 | /* Create a fixup for an expression. Same arguments as fix_new_exp, | |
1858 | plus FIX_ADDA which is TRUE for ADDA instructions (to indicate that | |
1859 | fixes resolving to constants should have those constants implicitly | |
1860 | shifted) and FALSE otherwise, but look for C6X-specific expression | |
1861 | types and adjust the relocations or give errors accordingly. */ | |
1862 | ||
1863 | static void | |
1864 | tic6x_fix_new_exp (fragS *frag, int where, int size, expressionS *exp, | |
1865 | int pcrel, bfd_reloc_code_real_type r_type, | |
1866 | bfd_boolean fix_adda) | |
1867 | { | |
1868 | bfd_reloc_code_real_type new_reloc = BFD_RELOC_UNUSED; | |
4a732032 | 1869 | symbolS *subsy = NULL; |
40b36596 JM |
1870 | fixS *fix; |
1871 | ||
1872 | switch (exp->X_op) | |
1873 | { | |
1874 | case O_dsbt_index: | |
1875 | switch (r_type) | |
1876 | { | |
1877 | case BFD_RELOC_C6000_SBR_U15_W: | |
1878 | new_reloc = BFD_RELOC_C6000_DSBT_INDEX; | |
1879 | break; | |
1880 | ||
1881 | default: | |
1882 | as_bad (_("$DSBT_INDEX not supported in this context")); | |
1883 | return; | |
1884 | } | |
1885 | break; | |
1886 | ||
1887 | case O_got: | |
1888 | switch (r_type) | |
1889 | { | |
1890 | case BFD_RELOC_C6000_SBR_U15_W: | |
1891 | new_reloc = BFD_RELOC_C6000_SBR_GOT_U15_W; | |
1892 | break; | |
1893 | ||
1894 | default: | |
1895 | as_bad (_("$GOT not supported in this context")); | |
1896 | return; | |
1897 | } | |
1898 | break; | |
1899 | ||
1900 | case O_dpr_got: | |
1901 | switch (r_type) | |
1902 | { | |
1903 | case BFD_RELOC_C6000_ABS_L16: | |
1904 | new_reloc = BFD_RELOC_C6000_SBR_GOT_L16_W; | |
1905 | break; | |
1906 | ||
1907 | case BFD_RELOC_C6000_ABS_H16: | |
1908 | new_reloc = BFD_RELOC_C6000_SBR_GOT_H16_W; | |
1909 | break; | |
1910 | ||
1911 | default: | |
1912 | as_bad (_("$DPR_GOT not supported in this context")); | |
1913 | return; | |
1914 | } | |
1915 | break; | |
1916 | ||
1917 | case O_dpr_byte: | |
1918 | switch (r_type) | |
1919 | { | |
1920 | case BFD_RELOC_C6000_ABS_S16: | |
1921 | new_reloc = BFD_RELOC_C6000_SBR_S16; | |
1922 | break; | |
1923 | ||
1924 | case BFD_RELOC_C6000_ABS_L16: | |
1925 | new_reloc = BFD_RELOC_C6000_SBR_L16_B; | |
1926 | break; | |
1927 | ||
1928 | case BFD_RELOC_C6000_ABS_H16: | |
1929 | new_reloc = BFD_RELOC_C6000_SBR_H16_B; | |
1930 | break; | |
1931 | ||
1932 | default: | |
1933 | as_bad (_("$DPR_BYTE not supported in this context")); | |
1934 | return; | |
1935 | } | |
1936 | break; | |
1937 | ||
1938 | case O_dpr_hword: | |
1939 | switch (r_type) | |
1940 | { | |
1941 | case BFD_RELOC_C6000_ABS_L16: | |
1942 | new_reloc = BFD_RELOC_C6000_SBR_L16_H; | |
1943 | break; | |
1944 | ||
1945 | case BFD_RELOC_C6000_ABS_H16: | |
1946 | new_reloc = BFD_RELOC_C6000_SBR_H16_H; | |
1947 | break; | |
1948 | ||
1949 | default: | |
1950 | as_bad (_("$DPR_HWORD not supported in this context")); | |
1951 | return; | |
1952 | } | |
1953 | break; | |
1954 | ||
1955 | case O_dpr_word: | |
1956 | switch (r_type) | |
1957 | { | |
1958 | case BFD_RELOC_C6000_ABS_L16: | |
1959 | new_reloc = BFD_RELOC_C6000_SBR_L16_W; | |
1960 | break; | |
1961 | ||
1962 | case BFD_RELOC_C6000_ABS_H16: | |
1963 | new_reloc = BFD_RELOC_C6000_SBR_H16_W; | |
1964 | break; | |
1965 | ||
1966 | default: | |
1967 | as_bad (_("$DPR_WORD not supported in this context")); | |
1968 | return; | |
1969 | } | |
1970 | break; | |
1971 | ||
4a732032 BS |
1972 | case O_pcr_offset: |
1973 | subsy = exp->X_op_symbol; | |
1974 | switch (r_type) | |
1975 | { | |
1976 | case BFD_RELOC_C6000_ABS_S16: | |
1977 | case BFD_RELOC_C6000_ABS_L16: | |
1978 | new_reloc = BFD_RELOC_C6000_PCR_L16; | |
1979 | break; | |
1980 | ||
1981 | case BFD_RELOC_C6000_ABS_H16: | |
1982 | new_reloc = BFD_RELOC_C6000_PCR_H16; | |
1983 | break; | |
1984 | ||
1985 | default: | |
1986 | as_bad (_("$PCR_OFFSET not supported in this context")); | |
1987 | return; | |
1988 | } | |
1989 | break; | |
1990 | ||
40b36596 JM |
1991 | case O_symbol: |
1992 | break; | |
1993 | ||
1994 | default: | |
1995 | if (pcrel) | |
1996 | { | |
1997 | as_bad (_("invalid PC-relative operand")); | |
1998 | return; | |
1999 | } | |
2000 | break; | |
2001 | } | |
2002 | ||
2003 | if (new_reloc == BFD_RELOC_UNUSED) | |
2004 | fix = fix_new_exp (frag, where, size, exp, pcrel, r_type); | |
2005 | else | |
2006 | fix = fix_new (frag, where, size, exp->X_add_symbol, exp->X_add_number, | |
2007 | pcrel, new_reloc); | |
4a732032 | 2008 | fix->tc_fix_data.fix_subsy = subsy; |
40b36596 JM |
2009 | fix->tc_fix_data.fix_adda = fix_adda; |
2010 | } | |
2011 | ||
2012 | /* Generate a fix for a constant (.word etc.). Needed to ensure these | |
2013 | go through the error checking in tic6x_fix_new_exp. */ | |
2014 | ||
2015 | void | |
2016 | tic6x_cons_fix_new (fragS *frag, int where, int size, expressionS *exp) | |
2017 | { | |
2018 | bfd_reloc_code_real_type r_type; | |
2019 | ||
2020 | switch (size) | |
2021 | { | |
2022 | case 1: | |
2023 | r_type = BFD_RELOC_8; | |
2024 | break; | |
2025 | ||
2026 | case 2: | |
2027 | r_type = BFD_RELOC_16; | |
2028 | break; | |
2029 | ||
2030 | case 4: | |
2031 | r_type = BFD_RELOC_32; | |
2032 | break; | |
2033 | ||
2034 | default: | |
2035 | as_bad (_("no %d-byte relocations available"), size); | |
2036 | return; | |
2037 | } | |
2038 | ||
2039 | tic6x_fix_new_exp (frag, where, size, exp, 0, r_type, FALSE); | |
2040 | } | |
2041 | ||
2042 | /* Initialize target-specific fix data. */ | |
2043 | ||
2044 | void | |
2045 | tic6x_init_fix_data (fixS *fixP) | |
2046 | { | |
2047 | fixP->tc_fix_data.fix_adda = FALSE; | |
4a732032 | 2048 | fixP->tc_fix_data.fix_subsy = NULL; |
40b36596 JM |
2049 | } |
2050 | ||
43bb514a BS |
2051 | /* Return true if the fix can be handled by GAS, false if it must |
2052 | be passed through to the linker. */ | |
2053 | ||
2054 | bfd_boolean | |
2055 | tic6x_fix_adjustable (fixS *fixP) | |
2056 | { | |
2057 | switch (fixP->fx_r_type) | |
2058 | { | |
2059 | /* Adjust_reloc_syms doesn't know about the GOT. */ | |
2060 | case BFD_RELOC_C6000_SBR_GOT_U15_W: | |
2061 | case BFD_RELOC_C6000_SBR_GOT_H16_W: | |
2062 | case BFD_RELOC_C6000_SBR_GOT_L16_W: | |
2fbb87f6 | 2063 | case BFD_RELOC_C6000_EHTYPE: |
43bb514a BS |
2064 | return 0; |
2065 | ||
1bce6bd8 PB |
2066 | case BFD_RELOC_C6000_PREL31: |
2067 | return 0; | |
2068 | ||
4a732032 BS |
2069 | case BFD_RELOC_C6000_PCR_H16: |
2070 | case BFD_RELOC_C6000_PCR_L16: | |
2071 | return 0; | |
2072 | ||
43bb514a BS |
2073 | default: |
2074 | return 1; | |
2075 | } | |
2076 | } | |
2077 | ||
40b36596 JM |
2078 | /* Given the fine-grained form of an operand, return the coarse |
2079 | (bit-mask) form. */ | |
2080 | ||
2081 | static unsigned int | |
2082 | tic6x_coarse_operand_form (tic6x_operand_form form) | |
2083 | { | |
2084 | switch (form) | |
2085 | { | |
2086 | case tic6x_operand_asm_const: | |
2087 | case tic6x_operand_link_const: | |
2088 | return TIC6X_OP_EXP; | |
2089 | ||
2090 | case tic6x_operand_reg: | |
2091 | case tic6x_operand_xreg: | |
2092 | case tic6x_operand_dreg: | |
2093 | case tic6x_operand_areg: | |
2094 | case tic6x_operand_retreg: | |
2095 | return TIC6X_OP_REG; | |
2096 | ||
2097 | case tic6x_operand_regpair: | |
2098 | case tic6x_operand_xregpair: | |
2099 | case tic6x_operand_dregpair: | |
2100 | return TIC6X_OP_REGPAIR; | |
2101 | ||
2102 | case tic6x_operand_irp: | |
2103 | return TIC6X_OP_IRP; | |
2104 | ||
2105 | case tic6x_operand_nrp: | |
2106 | return TIC6X_OP_NRP; | |
2107 | ||
2108 | case tic6x_operand_ctrl: | |
2109 | return TIC6X_OP_CTRL; | |
2110 | ||
2111 | case tic6x_operand_mem_short: | |
2112 | case tic6x_operand_mem_long: | |
2113 | case tic6x_operand_mem_deref: | |
2114 | return TIC6X_OP_MEM_NOUNREG; | |
2115 | ||
2116 | case tic6x_operand_mem_ndw: | |
2117 | return TIC6X_OP_MEM_UNREG; | |
2118 | ||
2119 | case tic6x_operand_func_unit: | |
2120 | return TIC6X_OP_FUNC_UNIT; | |
2121 | ||
2122 | default: | |
2123 | abort (); | |
2124 | } | |
2125 | } | |
2126 | ||
2127 | /* How an operand may match or not match a desired form. If different | |
2128 | instruction alternatives fail in different ways, the first failure | |
2129 | in this list determines the diagnostic. */ | |
2130 | typedef enum | |
2131 | { | |
2132 | /* Matches. */ | |
2133 | tic6x_match_matches, | |
2134 | /* Bad coarse form. */ | |
2135 | tic6x_match_coarse, | |
2136 | /* Not constant. */ | |
2137 | tic6x_match_non_const, | |
2138 | /* Register on wrong side. */ | |
2139 | tic6x_match_wrong_side, | |
2140 | /* Not a valid address register. */ | |
2141 | tic6x_match_bad_address, | |
2142 | /* Not a valid return address register. */ | |
2143 | tic6x_match_bad_return, | |
2144 | /* Control register not readable. */ | |
2145 | tic6x_match_ctrl_write_only, | |
2146 | /* Control register not writable. */ | |
2147 | tic6x_match_ctrl_read_only, | |
2148 | /* Not a valid memory reference for this instruction. */ | |
2149 | tic6x_match_bad_mem | |
2150 | } tic6x_operand_match; | |
2151 | ||
2152 | /* Return whether an operand matches the given fine-grained form and | |
2153 | read/write usage, and, if it does not match, how it fails to match. | |
2154 | The main functional unit side is SIDE; the cross-path side is CROSS | |
2155 | (the same as SIDE if a cross path not used); the data side is | |
2156 | DATA_SIDE. */ | |
2157 | static tic6x_operand_match | |
2158 | tic6x_operand_matches_form (const tic6x_operand *op, tic6x_operand_form form, | |
2159 | tic6x_rw rw, unsigned int side, unsigned int cross, | |
2160 | unsigned int data_side) | |
2161 | { | |
2162 | unsigned int coarse = tic6x_coarse_operand_form (form); | |
2163 | ||
2164 | if (coarse != op->form) | |
2165 | return tic6x_match_coarse; | |
2166 | ||
2167 | switch (form) | |
2168 | { | |
2169 | case tic6x_operand_asm_const: | |
2170 | if (op->value.exp.X_op == O_constant) | |
2171 | return tic6x_match_matches; | |
2172 | else | |
2173 | return tic6x_match_non_const; | |
2174 | ||
2175 | case tic6x_operand_link_const: | |
2176 | case tic6x_operand_irp: | |
2177 | case tic6x_operand_nrp: | |
2178 | case tic6x_operand_func_unit: | |
2179 | /* All expressions are link-time constants, although there may | |
2180 | not be relocations to express them in the output file. "irp" | |
2181 | and "nrp" are unique operand values. All parsed functional | |
2182 | unit names are valid. */ | |
2183 | return tic6x_match_matches; | |
2184 | ||
2185 | case tic6x_operand_reg: | |
2186 | case tic6x_operand_regpair: | |
2187 | if (op->value.reg.side == side) | |
2188 | return tic6x_match_matches; | |
2189 | else | |
2190 | return tic6x_match_wrong_side; | |
2191 | ||
2192 | case tic6x_operand_xreg: | |
2193 | case tic6x_operand_xregpair: | |
2194 | if (op->value.reg.side == cross) | |
2195 | return tic6x_match_matches; | |
2196 | else | |
2197 | return tic6x_match_wrong_side; | |
2198 | ||
2199 | case tic6x_operand_dreg: | |
2200 | case tic6x_operand_dregpair: | |
2201 | if (op->value.reg.side == data_side) | |
2202 | return tic6x_match_matches; | |
2203 | else | |
2204 | return tic6x_match_wrong_side; | |
2205 | ||
2206 | case tic6x_operand_areg: | |
2207 | if (op->value.reg.side != cross) | |
2208 | return tic6x_match_wrong_side; | |
2209 | else if (op->value.reg.side == 2 | |
2210 | && (op->value.reg.num == 14 || op->value.reg.num == 15)) | |
2211 | return tic6x_match_matches; | |
2212 | else | |
2213 | return tic6x_match_bad_address; | |
2214 | ||
2215 | case tic6x_operand_retreg: | |
2216 | if (op->value.reg.side != side) | |
2217 | return tic6x_match_wrong_side; | |
2218 | else if (op->value.reg.num != 3) | |
2219 | return tic6x_match_bad_return; | |
2220 | else | |
2221 | return tic6x_match_matches; | |
2222 | ||
2223 | case tic6x_operand_ctrl: | |
2224 | switch (rw) | |
2225 | { | |
2226 | case tic6x_rw_read: | |
2227 | if (tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_read | |
2228 | || tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_read_write) | |
2229 | return tic6x_match_matches; | |
2230 | else | |
2231 | return tic6x_match_ctrl_write_only; | |
2232 | ||
2233 | case tic6x_rw_write: | |
2234 | if (tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_write | |
2235 | || tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_read_write) | |
2236 | return tic6x_match_matches; | |
2237 | else | |
2238 | return tic6x_match_ctrl_read_only; | |
2239 | ||
2240 | default: | |
2241 | abort (); | |
2242 | } | |
2243 | ||
2244 | case tic6x_operand_mem_deref: | |
2245 | if (op->value.mem.mod != tic6x_mem_mod_none) | |
2246 | return tic6x_match_bad_mem; | |
2247 | else if (op->value.mem.scaled != tic6x_offset_none) | |
2248 | abort (); | |
2249 | else if (op->value.mem.base_reg.side != side) | |
2250 | return tic6x_match_bad_mem; | |
2251 | else | |
2252 | return tic6x_match_matches; | |
2253 | ||
2254 | case tic6x_operand_mem_short: | |
2255 | case tic6x_operand_mem_ndw: | |
2256 | if (op->value.mem.base_reg.side != side) | |
2257 | return tic6x_match_bad_mem; | |
2258 | if (op->value.mem.mod == tic6x_mem_mod_none) | |
2259 | { | |
2260 | if (op->value.mem.scaled != tic6x_offset_none) | |
2261 | abort (); | |
2262 | return tic6x_match_matches; | |
2263 | } | |
2264 | if (op->value.mem.scaled == tic6x_offset_none) | |
2265 | { | |
2266 | if (op->value.mem.mod == tic6x_mem_mod_plus | |
2267 | || op->value.mem.mod == tic6x_mem_mod_minus) | |
2268 | abort (); | |
2269 | return tic6x_match_matches; | |
2270 | } | |
2271 | if (op->value.mem.offset_is_reg) | |
2272 | { | |
2273 | if (op->value.mem.scaled == tic6x_offset_unscaled | |
2274 | && form != tic6x_operand_mem_ndw) | |
2275 | abort (); | |
2276 | if (op->value.mem.offset.reg.side == side) | |
2277 | return tic6x_match_matches; | |
2278 | else | |
2279 | return tic6x_match_bad_mem; | |
2280 | } | |
2281 | else | |
2282 | { | |
2283 | if (op->value.mem.offset.exp.X_op == O_constant) | |
2284 | return tic6x_match_matches; | |
2285 | else | |
2286 | return tic6x_match_bad_mem; | |
2287 | } | |
2288 | ||
2289 | case tic6x_operand_mem_long: | |
2290 | if (op->value.mem.base_reg.side == 2 | |
2291 | && (op->value.mem.base_reg.num == 14 | |
2292 | || op->value.mem.base_reg.num == 15)) | |
2293 | { | |
2294 | switch (op->value.mem.mod) | |
2295 | { | |
2296 | case tic6x_mem_mod_none: | |
2297 | if (op->value.mem.scaled != tic6x_offset_none) | |
2298 | abort (); | |
2299 | return tic6x_match_matches; | |
2300 | ||
2301 | case tic6x_mem_mod_plus: | |
2302 | if (op->value.mem.scaled == tic6x_offset_none) | |
2303 | abort (); | |
2304 | if (op->value.mem.offset_is_reg) | |
2305 | return tic6x_match_bad_mem; | |
2306 | else if (op->value.mem.scaled == tic6x_offset_scaled | |
2307 | && op->value.mem.offset.exp.X_op != O_constant) | |
2308 | return tic6x_match_bad_mem; | |
2309 | else | |
2310 | return tic6x_match_matches; | |
2311 | ||
2312 | case tic6x_mem_mod_minus: | |
2313 | case tic6x_mem_mod_preinc: | |
2314 | case tic6x_mem_mod_predec: | |
2315 | case tic6x_mem_mod_postinc: | |
2316 | case tic6x_mem_mod_postdec: | |
2317 | return tic6x_match_bad_mem; | |
2318 | ||
2319 | default: | |
2320 | abort (); | |
2321 | } | |
2322 | ||
2323 | } | |
2324 | else | |
2325 | return tic6x_match_bad_mem; | |
2326 | ||
2327 | default: | |
2328 | abort (); | |
2329 | } | |
2330 | } | |
2331 | ||
2332 | /* Return the number of bits shift used with DP-relative coding method | |
2333 | CODING. */ | |
2334 | ||
2335 | static unsigned int | |
2336 | tic6x_dpr_shift (tic6x_coding_method coding) | |
2337 | { | |
2338 | switch (coding) | |
2339 | { | |
2340 | case tic6x_coding_ulcst_dpr_byte: | |
2341 | return 0; | |
2342 | ||
2343 | case tic6x_coding_ulcst_dpr_half: | |
2344 | return 1; | |
2345 | ||
2346 | case tic6x_coding_ulcst_dpr_word: | |
2347 | return 2; | |
2348 | ||
2349 | default: | |
2350 | abort (); | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | /* Return the relocation used with DP-relative coding method | |
2355 | CODING. */ | |
2356 | ||
2357 | static bfd_reloc_code_real_type | |
2358 | tic6x_dpr_reloc (tic6x_coding_method coding) | |
2359 | { | |
2360 | switch (coding) | |
2361 | { | |
2362 | case tic6x_coding_ulcst_dpr_byte: | |
2363 | return BFD_RELOC_C6000_SBR_U15_B; | |
2364 | ||
2365 | case tic6x_coding_ulcst_dpr_half: | |
2366 | return BFD_RELOC_C6000_SBR_U15_H; | |
2367 | ||
2368 | case tic6x_coding_ulcst_dpr_word: | |
2369 | return BFD_RELOC_C6000_SBR_U15_W; | |
2370 | ||
2371 | default: | |
2372 | abort (); | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | /* Given a memory reference *MEM_REF as originally parsed, fill in | |
2377 | defaults for missing offsets. */ | |
2378 | ||
2379 | static void | |
2380 | tic6x_default_mem_ref (tic6x_mem_ref *mem_ref) | |
2381 | { | |
2382 | switch (mem_ref->mod) | |
2383 | { | |
2384 | case tic6x_mem_mod_none: | |
2385 | if (mem_ref->scaled != tic6x_offset_none) | |
2386 | abort (); | |
2387 | mem_ref->mod = tic6x_mem_mod_plus; | |
2388 | mem_ref->scaled = tic6x_offset_unscaled; | |
2389 | mem_ref->offset_is_reg = FALSE; | |
2390 | memset (&mem_ref->offset.exp, 0, sizeof mem_ref->offset.exp); | |
2391 | mem_ref->offset.exp.X_op = O_constant; | |
2392 | mem_ref->offset.exp.X_add_number = 0; | |
2393 | mem_ref->offset.exp.X_unsigned = 0; | |
2394 | break; | |
2395 | ||
2396 | case tic6x_mem_mod_plus: | |
2397 | case tic6x_mem_mod_minus: | |
2398 | if (mem_ref->scaled == tic6x_offset_none) | |
2399 | abort (); | |
2400 | break; | |
2401 | ||
2402 | case tic6x_mem_mod_preinc: | |
2403 | case tic6x_mem_mod_predec: | |
2404 | case tic6x_mem_mod_postinc: | |
2405 | case tic6x_mem_mod_postdec: | |
2406 | if (mem_ref->scaled != tic6x_offset_none) | |
2407 | break; | |
2408 | mem_ref->scaled = tic6x_offset_scaled; | |
2409 | mem_ref->offset_is_reg = FALSE; | |
2410 | memset (&mem_ref->offset.exp, 0, sizeof mem_ref->offset.exp); | |
2411 | mem_ref->offset.exp.X_op = O_constant; | |
2412 | mem_ref->offset.exp.X_add_number = 1; | |
2413 | mem_ref->offset.exp.X_unsigned = 0; | |
2414 | break; | |
2415 | ||
2416 | default: | |
2417 | abort (); | |
2418 | } | |
2419 | } | |
2420 | ||
2421 | /* Return the encoding in the 8-bit field of an SPMASK or SPMASKR | |
2422 | instruction of the specified UNIT, side SIDE. */ | |
2423 | ||
2424 | static unsigned int | |
2425 | tic6x_encode_spmask (tic6x_func_unit_base unit, unsigned int side) | |
2426 | { | |
2427 | switch (unit) | |
2428 | { | |
2429 | case tic6x_func_unit_l: | |
2430 | return 1 << (side - 1); | |
2431 | ||
2432 | case tic6x_func_unit_s: | |
2433 | return 1 << (side + 1); | |
2434 | ||
2435 | case tic6x_func_unit_d: | |
2436 | return 1 << (side + 3); | |
2437 | ||
2438 | case tic6x_func_unit_m: | |
2439 | return 1 << (side + 5); | |
2440 | ||
2441 | default: | |
2442 | abort (); | |
2443 | } | |
2444 | } | |
2445 | ||
2446 | /* Try to encode the instruction with opcode number ID and operands | |
2447 | OPERANDS (number NUM_OPERANDS), creg value THIS_LINE_CREG and z | |
2448 | value THIS_LINE_Z; FUNC_UNIT_SIDE, FUNC_UNIT_CROSS and | |
2449 | FUNC_UNIT_DATA_SIDE describe the functional unit specification; | |
2450 | SPLOOP_II is the ii value from the previous SPLOOP-family | |
2451 | instruction, or 0 if not in such a loop; the only possible problems | |
2452 | are operands being out of range (they already match the | |
2453 | fine-grained form), and inappropriate predication. If this | |
2454 | succeeds, return the encoding and set *OK to TRUE; otherwise return | |
2455 | 0 and set *OK to FALSE. If a fix is needed, set *FIX_NEEDED to | |
2456 | true and fill in *FIX_EXP, *FIX_PCREL, *FX_R_TYPE and *FIX_ADDA. | |
2457 | Print error messages for failure if PRINT_ERRORS is TRUE; the | |
2458 | opcode starts at STR and has length OPC_LEN. */ | |
2459 | ||
2460 | static unsigned int | |
2461 | tic6x_try_encode (tic6x_opcode_id id, tic6x_operand *operands, | |
2462 | unsigned int num_operands, unsigned int this_line_creg, | |
2463 | unsigned int this_line_z, unsigned int func_unit_side, | |
2464 | unsigned int func_unit_cross, | |
2465 | unsigned int func_unit_data_side, int sploop_ii, | |
2466 | expressionS **fix_exp, int *fix_pcrel, | |
2467 | bfd_reloc_code_real_type *fx_r_type, bfd_boolean *fix_adda, | |
2468 | bfd_boolean *fix_needed, bfd_boolean *ok, | |
2469 | bfd_boolean print_errors, char *str, int opc_len) | |
2470 | { | |
2471 | const tic6x_opcode *opct; | |
2472 | const tic6x_insn_format *fmt; | |
2473 | unsigned int opcode_value; | |
2474 | unsigned int fld; | |
2475 | ||
2476 | opct = &tic6x_opcode_table[id]; | |
2477 | fmt = &tic6x_insn_format_table[opct->format]; | |
2478 | opcode_value = fmt->cst_bits; | |
2479 | ||
2480 | for (fld = 0; fld < opct->num_fixed_fields; fld++) | |
2481 | { | |
2482 | if (opct->fixed_fields[fld].min_val == opct->fixed_fields[fld].max_val) | |
2483 | { | |
2484 | const tic6x_insn_field *fldd; | |
2485 | fldd = tic6x_field_from_fmt (fmt, opct->fixed_fields[fld].field_id); | |
2486 | if (fldd == NULL) | |
2487 | abort (); | |
2488 | opcode_value |= opct->fixed_fields[fld].min_val << fldd->low_pos; | |
2489 | } | |
2490 | } | |
2491 | ||
2492 | for (fld = 0; fld < opct->num_variable_fields; fld++) | |
2493 | { | |
2494 | const tic6x_insn_field *fldd; | |
2495 | unsigned int value; | |
2496 | unsigned int opno; | |
2497 | unsigned int ffld; | |
2498 | offsetT sign_value; | |
2499 | unsigned int bits; | |
2500 | unsigned int fcyc_bits; | |
2501 | expressionS *expp; | |
2502 | expressionS ucexp; | |
2503 | tic6x_mem_ref mem; | |
2504 | ||
2505 | fldd = tic6x_field_from_fmt (fmt, opct->variable_fields[fld].field_id); | |
2506 | if (fldd == NULL) | |
2507 | abort (); | |
2508 | opno = opct->variable_fields[fld].operand_num; | |
2509 | switch (opct->variable_fields[fld].coding_method) | |
2510 | { | |
2511 | case tic6x_coding_ucst: | |
2512 | if (operands[opno].form != TIC6X_OP_EXP) | |
2513 | abort (); | |
2514 | if (operands[opno].value.exp.X_op != O_constant) | |
2515 | abort (); | |
2516 | ucexp = operands[opno].value.exp; | |
2517 | unsigned_constant: | |
2518 | if (ucexp.X_add_number < 0 | |
2519 | || ucexp.X_add_number >= (1 << fldd->width)) | |
2520 | { | |
2521 | if (print_errors) | |
2522 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2523 | opc_len, str); | |
2524 | *ok = FALSE; | |
2525 | return 0; | |
2526 | } | |
2527 | value = ucexp.X_add_number; | |
2528 | break; | |
2529 | ||
2530 | case tic6x_coding_scst: | |
2531 | if (operands[opno].form != TIC6X_OP_EXP) | |
2532 | abort (); | |
2533 | if (operands[opno].value.exp.X_op != O_constant) | |
2534 | { | |
2535 | value = 0; | |
2536 | /* Opcode table should not permit non-constants without | |
2537 | a known relocation for them. */ | |
2538 | if (fldd->low_pos != 7 || fldd->width != 16) | |
2539 | abort (); | |
2540 | *fix_needed = TRUE; | |
2541 | *fix_exp = &operands[opno].value.exp; | |
2542 | *fix_pcrel = 0; | |
2543 | *fx_r_type = BFD_RELOC_C6000_ABS_S16; | |
2544 | *fix_adda = FALSE; | |
2545 | break; | |
2546 | } | |
2547 | sign_value = SEXT (operands[opno].value.exp.X_add_number); | |
2548 | signed_constant: | |
2549 | if (sign_value < -(1 << (fldd->width - 1)) | |
2550 | || (sign_value >= (1 << (fldd->width - 1)))) | |
2551 | { | |
2552 | if (print_errors) | |
2553 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2554 | opc_len, str); | |
2555 | *ok = FALSE; | |
2556 | return 0; | |
2557 | } | |
2558 | value = sign_value + (1 << (fldd->width - 1)); | |
2559 | value ^= (1 << (fldd->width - 1)); | |
2560 | break; | |
2561 | ||
2562 | case tic6x_coding_ucst_minus_one: | |
2563 | if (operands[opno].form != TIC6X_OP_EXP) | |
2564 | abort (); | |
2565 | if (operands[opno].value.exp.X_op != O_constant) | |
2566 | abort (); | |
2567 | if (operands[opno].value.exp.X_add_number <= 0 | |
2568 | || operands[opno].value.exp.X_add_number > (1 << fldd->width)) | |
2569 | { | |
2570 | if (print_errors) | |
2571 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2572 | opc_len, str); | |
2573 | *ok = FALSE; | |
2574 | return 0; | |
2575 | } | |
2576 | value = operands[opno].value.exp.X_add_number - 1; | |
2577 | break; | |
2578 | ||
2579 | case tic6x_coding_scst_negate: | |
2580 | if (operands[opno].form != TIC6X_OP_EXP) | |
2581 | abort (); | |
2582 | if (operands[opno].value.exp.X_op != O_constant) | |
2583 | abort (); | |
2584 | sign_value = SEXT (-operands[opno].value.exp.X_add_number); | |
2585 | goto signed_constant; | |
2586 | ||
2587 | case tic6x_coding_ulcst_dpr_byte: | |
2588 | case tic6x_coding_ulcst_dpr_half: | |
2589 | case tic6x_coding_ulcst_dpr_word: | |
2590 | bits = tic6x_dpr_shift (opct->variable_fields[fld].coding_method); | |
2591 | switch (operands[opno].form) | |
2592 | { | |
2593 | case TIC6X_OP_EXP: | |
2594 | if (operands[opno].value.exp.X_op == O_constant) | |
2595 | { | |
2596 | ucexp = operands[opno].value.exp; | |
2597 | goto unsigned_constant; | |
2598 | } | |
2599 | expp = &operands[opno].value.exp; | |
2600 | break; | |
2601 | ||
2602 | case TIC6X_OP_MEM_NOUNREG: | |
2603 | mem = operands[opno].value.mem; | |
2604 | tic6x_default_mem_ref (&mem); | |
2605 | if (mem.offset_is_reg) | |
2606 | abort (); | |
2607 | if (mem.offset.exp.X_op == O_constant) | |
2608 | { | |
2609 | ucexp = mem.offset.exp; | |
2610 | if (mem.scaled == tic6x_offset_unscaled) | |
2611 | { | |
2612 | if (ucexp.X_add_number & ((1 << bits) - 1)) | |
2613 | { | |
2614 | if (print_errors) | |
2615 | as_bad (_("offset in operand %u of '%.*s' not " | |
2616 | "divisible by %u"), opno + 1, opc_len, | |
2617 | str, 1u << bits); | |
2618 | *ok = FALSE; | |
2619 | return 0; | |
2620 | } | |
2621 | ucexp.X_add_number >>= bits; | |
2622 | } | |
2623 | goto unsigned_constant; | |
2624 | } | |
2625 | if (mem.scaled != tic6x_offset_unscaled) | |
2626 | abort (); | |
2627 | if (operands[opno].value.mem.mod == tic6x_mem_mod_none | |
2628 | || operands[opno].value.mem.scaled != tic6x_offset_unscaled | |
2629 | || operands[opno].value.mem.offset_is_reg) | |
2630 | abort (); | |
2631 | expp = &operands[opno].value.mem.offset.exp; | |
2632 | break; | |
2633 | ||
2634 | default: | |
2635 | abort (); | |
2636 | } | |
2637 | value = 0; | |
2638 | /* Opcode table should not use this encoding without a known | |
2639 | relocation. */ | |
2640 | if (fldd->low_pos != 8 || fldd->width != 15) | |
2641 | abort (); | |
2642 | /* We do not check for offset divisibility here; such a | |
2643 | check is not needed at this point to encode the value, | |
2644 | and if there is eventually a problem it will be detected | |
2645 | either in md_apply_fix or at link time. */ | |
2646 | *fix_needed = TRUE; | |
2647 | *fix_exp = expp; | |
2648 | *fix_pcrel = 0; | |
2649 | *fx_r_type | |
2650 | = tic6x_dpr_reloc (opct->variable_fields[fld].coding_method); | |
2651 | if (operands[opno].form == TIC6X_OP_EXP) | |
2652 | *fix_adda = TRUE; | |
2653 | else | |
2654 | *fix_adda = FALSE; | |
2655 | break; | |
2656 | ||
2657 | case tic6x_coding_lcst_low16: | |
2658 | if (operands[opno].form != TIC6X_OP_EXP) | |
2659 | abort (); | |
2660 | if (operands[opno].value.exp.X_op == O_constant) | |
2661 | value = operands[opno].value.exp.X_add_number & 0xffff; | |
2662 | else | |
2663 | { | |
2664 | value = 0; | |
2665 | /* Opcode table should not use this encoding without a | |
2666 | known relocation. */ | |
2667 | if (fldd->low_pos != 7 || fldd->width != 16) | |
2668 | abort (); | |
2669 | *fix_needed = TRUE; | |
2670 | *fix_exp = &operands[opno].value.exp; | |
2671 | *fix_pcrel = 0; | |
2672 | *fx_r_type = BFD_RELOC_C6000_ABS_L16; | |
2673 | *fix_adda = FALSE; | |
2674 | } | |
2675 | break; | |
2676 | ||
2677 | case tic6x_coding_lcst_high16: | |
2678 | if (operands[opno].form != TIC6X_OP_EXP) | |
2679 | abort (); | |
2680 | if (operands[opno].value.exp.X_op == O_constant) | |
2681 | value = (operands[opno].value.exp.X_add_number >> 16) & 0xffff; | |
2682 | else | |
2683 | { | |
2684 | value = 0; | |
2685 | /* Opcode table should not use this encoding without a | |
2686 | known relocation. */ | |
2687 | if (fldd->low_pos != 7 || fldd->width != 16) | |
2688 | abort (); | |
2689 | *fix_needed = TRUE; | |
2690 | *fix_exp = &operands[opno].value.exp; | |
2691 | *fix_pcrel = 0; | |
2692 | *fx_r_type = BFD_RELOC_C6000_ABS_H16; | |
2693 | *fix_adda = FALSE; | |
2694 | } | |
2695 | break; | |
2696 | ||
2697 | case tic6x_coding_pcrel: | |
2698 | case tic6x_coding_pcrel_half: | |
2699 | if (operands[opno].form != TIC6X_OP_EXP) | |
2700 | abort (); | |
2701 | value = 0; | |
2702 | *fix_needed = TRUE; | |
2703 | *fix_exp = &operands[opno].value.exp; | |
2704 | *fix_pcrel = 1; | |
2705 | if (fldd->low_pos == 7 && fldd->width == 21) | |
2706 | *fx_r_type = BFD_RELOC_C6000_PCR_S21; | |
2707 | else if (fldd->low_pos == 16 && fldd->width == 12) | |
2708 | *fx_r_type = BFD_RELOC_C6000_PCR_S12; | |
2709 | else if (fldd->low_pos == 13 && fldd->width == 10) | |
2710 | *fx_r_type = BFD_RELOC_C6000_PCR_S10; | |
2711 | else if (fldd->low_pos == 16 && fldd->width == 7) | |
2712 | *fx_r_type = BFD_RELOC_C6000_PCR_S7; | |
2713 | else | |
2714 | /* Opcode table should not use this encoding without a | |
2715 | known relocation. */ | |
2716 | abort (); | |
2717 | *fix_adda = FALSE; | |
2718 | break; | |
2719 | ||
2720 | case tic6x_coding_reg: | |
2721 | switch (operands[opno].form) | |
2722 | { | |
2723 | case TIC6X_OP_REG: | |
2724 | case TIC6X_OP_REGPAIR: | |
2725 | value = operands[opno].value.reg.num; | |
2726 | break; | |
2727 | ||
2728 | case TIC6X_OP_MEM_NOUNREG: | |
2729 | case TIC6X_OP_MEM_UNREG: | |
2730 | value = operands[opno].value.mem.base_reg.num; | |
2731 | break; | |
2732 | ||
2733 | default: | |
2734 | abort (); | |
2735 | } | |
2736 | break; | |
2737 | ||
2738 | case tic6x_coding_areg: | |
2739 | switch (operands[opno].form) | |
2740 | { | |
2741 | case TIC6X_OP_REG: | |
2742 | value = (operands[opno].value.reg.num == 15 ? 1 : 0); | |
2743 | break; | |
2744 | ||
2745 | case TIC6X_OP_MEM_NOUNREG: | |
2746 | value = (operands[opno].value.mem.base_reg.num == 15 ? 1 : 0); | |
2747 | break; | |
2748 | ||
2749 | default: | |
2750 | abort (); | |
2751 | } | |
2752 | break; | |
2753 | ||
2754 | case tic6x_coding_crlo: | |
2755 | if (operands[opno].form != TIC6X_OP_CTRL) | |
2756 | abort (); | |
2757 | value = tic6x_ctrl_table[operands[opno].value.ctrl].crlo; | |
2758 | break; | |
2759 | ||
2760 | case tic6x_coding_crhi: | |
2761 | if (operands[opno].form != TIC6X_OP_CTRL) | |
2762 | abort (); | |
2763 | value = 0; | |
2764 | break; | |
2765 | ||
2766 | case tic6x_coding_reg_shift: | |
2767 | if (operands[opno].form != TIC6X_OP_REGPAIR) | |
2768 | abort (); | |
2769 | value = operands[opno].value.reg.num >> 1; | |
2770 | break; | |
2771 | ||
2772 | case tic6x_coding_mem_offset: | |
2773 | if (operands[opno].form != TIC6X_OP_MEM_NOUNREG) | |
2774 | abort (); | |
2775 | mem = operands[opno].value.mem; | |
2776 | tic6x_default_mem_ref (&mem); | |
2777 | if (mem.offset_is_reg) | |
2778 | { | |
2779 | if (mem.scaled != tic6x_offset_scaled) | |
2780 | abort (); | |
2781 | value = mem.offset.reg.num; | |
2782 | } | |
2783 | else | |
2784 | { | |
2785 | int scale; | |
2786 | ||
2787 | if (mem.offset.exp.X_op != O_constant) | |
2788 | abort (); | |
2789 | switch (mem.scaled) | |
2790 | { | |
2791 | case tic6x_offset_scaled: | |
2792 | scale = 1; | |
2793 | break; | |
2794 | ||
2795 | case tic6x_offset_unscaled: | |
2796 | scale = opct->operand_info[opno].size; | |
2797 | if (scale != 1 && scale != 2 && scale != 4 && scale != 8) | |
2798 | abort (); | |
2799 | break; | |
2800 | ||
2801 | default: | |
2802 | abort (); | |
2803 | } | |
2804 | if (mem.offset.exp.X_add_number < 0 | |
2805 | || mem.offset.exp.X_add_number >= (1 << fldd->width) * scale) | |
2806 | { | |
2807 | if (print_errors) | |
2808 | as_bad (_("offset in operand %u of '%.*s' out of range"), | |
2809 | opno + 1, opc_len, str); | |
2810 | *ok = FALSE; | |
2811 | return 0; | |
2812 | } | |
2813 | if (mem.offset.exp.X_add_number % scale) | |
2814 | { | |
2815 | if (print_errors) | |
2816 | as_bad (_("offset in operand %u of '%.*s' not " | |
2817 | "divisible by %u"), | |
2818 | opno + 1, opc_len, str, scale); | |
2819 | *ok = FALSE; | |
2820 | return 0; | |
2821 | } | |
2822 | value = mem.offset.exp.X_add_number / scale; | |
2823 | } | |
2824 | break; | |
2825 | ||
2826 | case tic6x_coding_mem_offset_noscale: | |
2827 | if (operands[opno].form != TIC6X_OP_MEM_UNREG) | |
2828 | abort (); | |
2829 | mem = operands[opno].value.mem; | |
2830 | tic6x_default_mem_ref (&mem); | |
2831 | if (mem.offset_is_reg) | |
2832 | value = mem.offset.reg.num; | |
2833 | else | |
2834 | { | |
2835 | if (mem.offset.exp.X_op != O_constant) | |
2836 | abort (); | |
2837 | if (mem.offset.exp.X_add_number < 0 | |
2838 | || mem.offset.exp.X_add_number >= (1 << fldd->width)) | |
2839 | { | |
2840 | if (print_errors) | |
2841 | as_bad (_("offset in operand %u of '%.*s' out of range"), | |
2842 | opno + 1, opc_len, str); | |
2843 | *ok = FALSE; | |
2844 | return 0; | |
2845 | } | |
2846 | value = mem.offset.exp.X_add_number; | |
2847 | } | |
2848 | break; | |
2849 | ||
2850 | case tic6x_coding_mem_mode: | |
2851 | if (operands[opno].form != TIC6X_OP_MEM_NOUNREG | |
2852 | && operands[opno].form != TIC6X_OP_MEM_UNREG) | |
2853 | abort (); | |
2854 | mem = operands[opno].value.mem; | |
2855 | tic6x_default_mem_ref (&mem); | |
2856 | switch (mem.mod) | |
2857 | { | |
2858 | case tic6x_mem_mod_plus: | |
2859 | value = 1; | |
2860 | break; | |
2861 | ||
2862 | case tic6x_mem_mod_minus: | |
2863 | value = 0; | |
2864 | break; | |
2865 | ||
2866 | case tic6x_mem_mod_preinc: | |
2867 | value = 9; | |
2868 | break; | |
2869 | ||
2870 | case tic6x_mem_mod_predec: | |
2871 | value = 8; | |
2872 | break; | |
2873 | ||
2874 | case tic6x_mem_mod_postinc: | |
2875 | value = 11; | |
2876 | break; | |
2877 | ||
2878 | case tic6x_mem_mod_postdec: | |
2879 | value = 10; | |
2880 | break; | |
2881 | ||
2882 | default: | |
2883 | abort (); | |
2884 | } | |
2885 | value += (mem.offset_is_reg ? 4 : 0); | |
2886 | break; | |
2887 | ||
2888 | case tic6x_coding_scaled: | |
2889 | if (operands[opno].form != TIC6X_OP_MEM_UNREG) | |
2890 | abort (); | |
2891 | mem = operands[opno].value.mem; | |
2892 | tic6x_default_mem_ref (&mem); | |
2893 | switch (mem.scaled) | |
2894 | { | |
2895 | case tic6x_offset_unscaled: | |
2896 | value = 0; | |
2897 | break; | |
2898 | ||
2899 | case tic6x_offset_scaled: | |
2900 | value = 1; | |
2901 | break; | |
2902 | ||
2903 | default: | |
2904 | abort (); | |
2905 | } | |
2906 | break; | |
2907 | ||
2908 | case tic6x_coding_spmask: | |
2909 | /* The position of such a field is hardcoded in the handling | |
2910 | of "||^". */ | |
2911 | if (fldd->low_pos != 18) | |
2912 | abort (); | |
2913 | value = 0; | |
2914 | for (opno = 0; opno < num_operands; opno++) | |
2915 | { | |
2916 | unsigned int v; | |
2917 | ||
2918 | v = tic6x_encode_spmask (operands[opno].value.func_unit.base, | |
2919 | operands[opno].value.func_unit.side); | |
2920 | if (value & v) | |
2921 | { | |
2922 | if (print_errors) | |
2923 | as_bad (_("functional unit already masked for operand " | |
2924 | "%u of '%.*s'"), opno + 1, opc_len, str); | |
2925 | *ok = FALSE; | |
2926 | return 0; | |
2927 | } | |
2928 | value |= v; | |
2929 | } | |
2930 | break; | |
2931 | ||
2932 | case tic6x_coding_reg_unused: | |
2933 | /* This is a placeholder; correct handling goes along with | |
2934 | resource constraint checks. */ | |
2935 | value = 0; | |
2936 | break; | |
2937 | ||
2938 | case tic6x_coding_fstg: | |
2939 | case tic6x_coding_fcyc: | |
2940 | if (operands[opno].form != TIC6X_OP_EXP) | |
2941 | abort (); | |
2942 | if (operands[opno].value.exp.X_op != O_constant) | |
2943 | abort (); | |
2944 | if (!sploop_ii) | |
2945 | { | |
2946 | if (print_errors) | |
2947 | as_bad (_("'%.*s' instruction not in a software " | |
2948 | "pipelined loop"), | |
2949 | opc_len, str); | |
2950 | *ok = FALSE; | |
2951 | return 0; | |
2952 | } | |
2953 | ||
2954 | if (sploop_ii <= 1) | |
2955 | fcyc_bits = 0; | |
2956 | else if (sploop_ii <= 2) | |
2957 | fcyc_bits = 1; | |
2958 | else if (sploop_ii <= 4) | |
2959 | fcyc_bits = 2; | |
2960 | else if (sploop_ii <= 8) | |
2961 | fcyc_bits = 3; | |
2962 | else if (sploop_ii <= 14) | |
2963 | fcyc_bits = 4; | |
2964 | else | |
2965 | abort (); | |
2966 | if (fcyc_bits > fldd->width) | |
2967 | abort (); | |
2968 | ||
2969 | if (opct->variable_fields[fld].coding_method == tic6x_coding_fstg) | |
2970 | { | |
5d4c71e1 | 2971 | int i, t; |
40b36596 JM |
2972 | if (operands[opno].value.exp.X_add_number < 0 |
2973 | || (operands[opno].value.exp.X_add_number | |
2974 | >= (1 << (fldd->width - fcyc_bits)))) | |
2975 | { | |
2976 | if (print_errors) | |
2977 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2978 | opc_len, str); | |
2979 | *ok = FALSE; | |
2980 | return 0; | |
2981 | } | |
5d4c71e1 BS |
2982 | value = operands[opno].value.exp.X_add_number; |
2983 | for (t = 0, i = fcyc_bits; i < fldd->width; i++) | |
2984 | { | |
2985 | t = (t << 1) | (value & 1); | |
2986 | value >>= 1; | |
2987 | } | |
2988 | value = t << fcyc_bits; | |
40b36596 JM |
2989 | } |
2990 | else | |
2991 | { | |
2992 | if (operands[opno].value.exp.X_add_number < 0 | |
2993 | || (operands[opno].value.exp.X_add_number >= sploop_ii)) | |
2994 | { | |
2995 | if (print_errors) | |
2996 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2997 | opc_len, str); | |
2998 | *ok = FALSE; | |
2999 | return 0; | |
3000 | } | |
3001 | value = operands[opno].value.exp.X_add_number; | |
3002 | } | |
3003 | break; | |
3004 | ||
3005 | case tic6x_coding_fu: | |
3006 | value = func_unit_side == 2 ? 1 : 0; | |
3007 | break; | |
3008 | ||
3009 | case tic6x_coding_data_fu: | |
3010 | value = func_unit_data_side == 2 ? 1 : 0; | |
3011 | break; | |
3012 | ||
3013 | case tic6x_coding_xpath: | |
3014 | value = func_unit_cross; | |
3015 | break; | |
3016 | ||
3017 | default: | |
3018 | abort (); | |
3019 | } | |
3020 | ||
3021 | for (ffld = 0; ffld < opct->num_fixed_fields; ffld++) | |
3022 | if ((opct->fixed_fields[ffld].field_id | |
3023 | == opct->variable_fields[fld].field_id) | |
3024 | && (value < opct->fixed_fields[ffld].min_val | |
3025 | || value > opct->fixed_fields[ffld].max_val)) | |
3026 | { | |
3027 | if (print_errors) | |
3028 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
3029 | opc_len, str); | |
3030 | *ok = FALSE; | |
3031 | return 0; | |
3032 | } | |
3033 | ||
3034 | opcode_value |= value << fldd->low_pos; | |
3035 | } | |
3036 | ||
3037 | if (this_line_creg) | |
3038 | { | |
3039 | const tic6x_insn_field *creg; | |
3040 | const tic6x_insn_field *z; | |
3041 | ||
3042 | creg = tic6x_field_from_fmt (fmt, tic6x_field_creg); | |
3043 | if (creg == NULL) | |
3044 | { | |
3045 | if (print_errors) | |
3046 | as_bad (_("instruction '%.*s' cannot be predicated"), | |
3047 | opc_len, str); | |
3048 | *ok = FALSE; | |
3049 | return 0; | |
3050 | } | |
3051 | z = tic6x_field_from_fmt (fmt, tic6x_field_z); | |
3052 | /* If there is a creg field, there must be a z field; otherwise | |
3053 | there is an error in the format table. */ | |
3054 | if (z == NULL) | |
3055 | abort (); | |
3056 | ||
3057 | opcode_value |= this_line_creg << creg->low_pos; | |
3058 | opcode_value |= this_line_z << z->low_pos; | |
3059 | } | |
3060 | ||
3061 | *ok = TRUE; | |
3062 | return opcode_value; | |
3063 | } | |
3064 | ||
3065 | /* Convert the target integer stored in N bytes in BUF to a host | |
3066 | integer, returning that value. */ | |
3067 | ||
3068 | static valueT | |
3069 | md_chars_to_number (char *buf, int n) | |
3070 | { | |
3071 | valueT result = 0; | |
3072 | unsigned char *p = (unsigned char *) buf; | |
3073 | ||
3074 | if (target_big_endian) | |
3075 | { | |
3076 | while (n--) | |
3077 | { | |
3078 | result <<= 8; | |
3079 | result |= (*p++ & 0xff); | |
3080 | } | |
3081 | } | |
3082 | else | |
3083 | { | |
3084 | while (n--) | |
3085 | { | |
3086 | result <<= 8; | |
3087 | result |= (p[n] & 0xff); | |
3088 | } | |
3089 | } | |
3090 | ||
3091 | return result; | |
3092 | } | |
3093 | ||
3094 | /* Assemble the instruction starting at STR (an opcode, with the | |
3095 | opcode name all-lowercase). */ | |
3096 | ||
3097 | void | |
3098 | md_assemble (char *str) | |
3099 | { | |
3100 | char *p; | |
3101 | int opc_len; | |
3102 | bfd_boolean this_line_parallel; | |
3103 | bfd_boolean this_line_spmask; | |
3104 | unsigned int this_line_creg; | |
3105 | unsigned int this_line_z; | |
d99e5b39 | 3106 | tic6x_label_list *this_insn_label_list; |
40b36596 JM |
3107 | segment_info_type *seginfo; |
3108 | tic6x_opcode_list *opc_list, *opc; | |
3109 | tic6x_func_unit_base func_unit_base = tic6x_func_unit_nfu; | |
3110 | unsigned int func_unit_side = 0; | |
3111 | unsigned int func_unit_cross = 0; | |
3112 | unsigned int cross_side = 0; | |
3113 | unsigned int func_unit_data_side = 0; | |
3114 | unsigned int max_matching_opcodes, num_matching_opcodes; | |
3115 | tic6x_opcode_id *opcm = NULL; | |
3116 | unsigned int opc_rank[TIC6X_NUM_PREFER]; | |
3117 | const tic6x_opcode *opct = NULL; | |
3118 | int min_rank, try_rank, max_rank; | |
3119 | bfd_boolean num_operands_permitted[TIC6X_MAX_SOURCE_OPERANDS + 1] | |
3120 | = { FALSE }; | |
3121 | unsigned int operand_forms[TIC6X_MAX_SOURCE_OPERANDS] = { 0 }; | |
3122 | tic6x_operand operands[TIC6X_MAX_SOURCE_OPERANDS]; | |
3123 | unsigned int max_num_operands; | |
3124 | unsigned int num_operands_read; | |
3125 | bfd_boolean ok_this_arch, ok_this_fu, ok_this_arch_fu; | |
3126 | bfd_boolean bad_operands = FALSE; | |
3127 | unsigned int opcode_value; | |
3128 | bfd_boolean encoded_ok; | |
3129 | bfd_boolean fix_needed = FALSE; | |
3130 | expressionS *fix_exp = NULL; | |
3131 | int fix_pcrel = 0; | |
3132 | bfd_reloc_code_real_type fx_r_type = BFD_RELOC_UNUSED; | |
3133 | bfd_boolean fix_adda = FALSE; | |
d99e5b39 | 3134 | fragS *insn_frag; |
40b36596 JM |
3135 | char *output; |
3136 | ||
3137 | p = str; | |
3138 | while (*p && !is_end_of_line[(unsigned char) *p] && *p != ' ') | |
3139 | p++; | |
3140 | ||
3141 | /* This function should only have been called when there is actually | |
3142 | an instruction to assemble. */ | |
3143 | if (p == str) | |
3144 | abort (); | |
3145 | ||
59e6276b JM |
3146 | /* Now an instruction has been seen, architecture attributes from |
3147 | .arch directives merge with rather than overriding the previous | |
3148 | value. */ | |
3149 | tic6x_seen_insns = TRUE; | |
3150 | /* If no .arch directives or -march options have been seen, we are | |
3151 | assessing instruction validity based on the C674X default, so set | |
3152 | the attribute accordingly. */ | |
75fa6dc1 JM |
3153 | if (tic6x_arch_attribute == C6XABI_Tag_ISA_none) |
3154 | tic6x_arch_attribute = C6XABI_Tag_ISA_C674X; | |
59e6276b | 3155 | |
40b36596 JM |
3156 | /* Reset global settings for parallel bars and predicates now to |
3157 | avoid extra errors if there are problems with this opcode. */ | |
3158 | this_line_parallel = tic6x_line_parallel; | |
3159 | this_line_spmask = tic6x_line_spmask; | |
3160 | this_line_creg = tic6x_line_creg; | |
3161 | this_line_z = tic6x_line_z; | |
3162 | tic6x_line_parallel = FALSE; | |
3163 | tic6x_line_spmask = FALSE; | |
3164 | tic6x_line_creg = 0; | |
3165 | tic6x_line_z = 0; | |
3166 | seginfo = seg_info (now_seg); | |
d99e5b39 JM |
3167 | this_insn_label_list = seginfo->tc_segment_info_data.label_list; |
3168 | seginfo->tc_segment_info_data.label_list = NULL; | |
40b36596 JM |
3169 | |
3170 | opc_list = hash_find_n (opcode_hash, str, p - str); | |
3171 | if (opc_list == NULL) | |
3172 | { | |
3173 | char c = *p; | |
3174 | *p = 0; | |
3175 | as_bad (_("unknown opcode '%s'"), str); | |
3176 | *p = c; | |
3177 | return; | |
3178 | } | |
3179 | ||
3180 | opc_len = p - str; | |
3181 | skip_whitespace (p); | |
3182 | ||
3183 | /* See if there is something that looks like a functional unit | |
3184 | specifier. */ | |
3185 | if (*p == '.') | |
3186 | { | |
3187 | bfd_boolean good_func_unit; | |
3188 | tic6x_func_unit_base maybe_base = tic6x_func_unit_nfu; | |
3189 | unsigned int maybe_side = 0; | |
3190 | unsigned int maybe_cross = 0; | |
3191 | unsigned int maybe_data_side = 0; | |
3192 | ||
3193 | good_func_unit = tic6x_parse_func_unit_base (p + 1, &maybe_base, | |
3194 | &maybe_side); | |
3195 | ||
3196 | if (good_func_unit) | |
3197 | { | |
3198 | if (p[3] == ' ' || is_end_of_line[(unsigned char) p[3]]) | |
3199 | p += 3; | |
3200 | else if ((p[3] == 'x' || p[3] == 'X') | |
3201 | && (p[4] == ' ' || is_end_of_line[(unsigned char) p[4]])) | |
3202 | { | |
3203 | maybe_cross = 1; | |
3204 | p += 4; | |
3205 | } | |
3206 | else if (maybe_base == tic6x_func_unit_d | |
3207 | && (p[3] == 't' || p[3] == 'T') | |
3208 | && (p[4] == '1' || p[4] == '2') | |
3209 | && (p[5] == ' ' || is_end_of_line[(unsigned char) p[5]])) | |
3210 | { | |
3211 | maybe_data_side = p[4] - '0'; | |
3212 | p += 5; | |
3213 | } | |
3214 | else | |
3215 | good_func_unit = FALSE; | |
3216 | } | |
3217 | ||
3218 | if (good_func_unit) | |
3219 | { | |
3220 | func_unit_base = maybe_base; | |
3221 | func_unit_side = maybe_side; | |
3222 | func_unit_cross = maybe_cross; | |
3223 | cross_side = (func_unit_cross ? 3 - func_unit_side : func_unit_side); | |
3224 | func_unit_data_side = maybe_data_side; | |
3225 | } | |
3226 | ||
3227 | skip_whitespace (p); | |
3228 | } | |
3229 | ||
3230 | /* Determine which entries in the opcode table match, and the | |
3231 | associated permitted forms of operands. */ | |
3232 | max_matching_opcodes = 0; | |
3233 | for (opc = opc_list; opc; opc = opc->next) | |
3234 | max_matching_opcodes++; | |
3235 | num_matching_opcodes = 0; | |
3236 | opcm = xmalloc (max_matching_opcodes * sizeof (*opcm)); | |
3237 | max_num_operands = 0; | |
3238 | ok_this_arch = FALSE; | |
3239 | ok_this_fu = FALSE; | |
3240 | ok_this_arch_fu = FALSE; | |
3241 | for (opc = opc_list; opc; opc = opc->next) | |
3242 | { | |
3243 | unsigned int num_operands; | |
3244 | unsigned int i; | |
3245 | bfd_boolean this_opc_arch_ok = TRUE; | |
3246 | bfd_boolean this_opc_fu_ok = TRUE; | |
3247 | ||
3248 | if (tic6x_insn_format_table[tic6x_opcode_table[opc->id].format].num_bits | |
3249 | != 32) | |
3250 | continue; | |
3251 | if (!(tic6x_opcode_table[opc->id].isa_variants & tic6x_features)) | |
3252 | this_opc_arch_ok = FALSE; | |
3253 | if (tic6x_opcode_table[opc->id].func_unit != func_unit_base) | |
3254 | this_opc_fu_ok = FALSE; | |
3255 | if (func_unit_side == 1 | |
3256 | && (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_SIDE_B_ONLY)) | |
3257 | this_opc_fu_ok = FALSE; | |
3258 | if (func_unit_cross | |
3259 | && (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_NO_CROSS)) | |
3260 | this_opc_fu_ok = FALSE; | |
3261 | if (!func_unit_data_side | |
3262 | && (tic6x_opcode_table[opc->id].flags | |
3263 | & (TIC6X_FLAG_LOAD | TIC6X_FLAG_STORE))) | |
3264 | this_opc_fu_ok = FALSE; | |
3265 | if (func_unit_data_side | |
3266 | && !(tic6x_opcode_table[opc->id].flags | |
3267 | & (TIC6X_FLAG_LOAD | TIC6X_FLAG_STORE))) | |
3268 | this_opc_fu_ok = FALSE; | |
3269 | if (func_unit_data_side == 1 | |
3270 | && (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_SIDE_T2_ONLY)) | |
3271 | this_opc_fu_ok = FALSE; | |
3272 | if (this_opc_arch_ok) | |
3273 | ok_this_arch = TRUE; | |
3274 | if (this_opc_fu_ok) | |
3275 | ok_this_fu = TRUE; | |
3276 | if (!this_opc_arch_ok || !this_opc_fu_ok) | |
3277 | continue; | |
3278 | ok_this_arch_fu = TRUE; | |
3279 | opcm[num_matching_opcodes] = opc->id; | |
3280 | num_matching_opcodes++; | |
3281 | num_operands = tic6x_opcode_table[opc->id].num_operands; | |
3282 | ||
3283 | if (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_SPMASK) | |
3284 | { | |
3285 | if (num_operands != 1 | |
3286 | || (tic6x_opcode_table[opc->id].operand_info[0].form | |
3287 | != tic6x_operand_func_unit)) | |
3288 | abort (); | |
3289 | num_operands = 8; | |
3290 | for (i = 0; i < num_operands; i++) | |
3291 | { | |
3292 | operand_forms[i] | |
3293 | |= tic6x_coarse_operand_form (tic6x_operand_func_unit); | |
3294 | num_operands_permitted[i] = TRUE; | |
3295 | } | |
3296 | } | |
3297 | else | |
3298 | { | |
3299 | for (i = 0; i < num_operands; i++) | |
3300 | { | |
3301 | tic6x_operand_form f | |
3302 | = tic6x_opcode_table[opc->id].operand_info[i].form; | |
3303 | ||
3304 | operand_forms[i] |= tic6x_coarse_operand_form (f); | |
3305 | } | |
3306 | } | |
3307 | num_operands_permitted[num_operands] = TRUE; | |
3308 | if (num_operands > max_num_operands) | |
3309 | max_num_operands = num_operands; | |
3310 | } | |
3311 | ||
3312 | if (!ok_this_arch) | |
3313 | { | |
3314 | as_bad (_("'%.*s' instruction not supported on this architecture"), | |
3315 | opc_len, str); | |
3316 | free (opcm); | |
3317 | return; | |
3318 | } | |
3319 | ||
3320 | if (!ok_this_fu) | |
3321 | { | |
3322 | as_bad (_("'%.*s' instruction not supported on this functional unit"), | |
3323 | opc_len, str); | |
3324 | free (opcm); | |
3325 | return; | |
3326 | } | |
3327 | ||
3328 | if (!ok_this_arch_fu) | |
3329 | { | |
3330 | as_bad (_("'%.*s' instruction not supported on this functional unit" | |
3331 | " for this architecture"), | |
3332 | opc_len, str); | |
3333 | free (opcm); | |
3334 | return; | |
3335 | } | |
3336 | ||
3337 | /* If there were no instructions matching the above availability | |
3338 | checks, we should now have given an error and returned. */ | |
3339 | if (num_matching_opcodes == 0) | |
3340 | abort (); | |
3341 | ||
3342 | num_operands_read = 0; | |
3343 | while (TRUE) | |
3344 | { | |
3345 | skip_whitespace (p); | |
3346 | if (is_end_of_line[(unsigned char) *p]) | |
3347 | { | |
3348 | if (num_operands_read > 0) | |
3349 | { | |
3350 | as_bad (_("missing operand after comma")); | |
3351 | bad_operands = TRUE; | |
3352 | } | |
3353 | break; | |
3354 | } | |
3355 | ||
3356 | if (max_num_operands == 0) | |
3357 | { | |
3358 | as_bad (_("too many operands to '%.*s'"), opc_len, str); | |
3359 | bad_operands = TRUE; | |
3360 | break; | |
3361 | } | |
3362 | ||
3363 | if (!tic6x_parse_operand (&p, &operands[num_operands_read], | |
3364 | operand_forms[num_operands_read], str, opc_len, | |
3365 | num_operands_read + 1)) | |
3366 | bad_operands = TRUE; | |
3367 | num_operands_read++; | |
3368 | ||
3369 | if (is_end_of_line[(unsigned char) *p]) | |
3370 | break; | |
3371 | else if (*p == ',') | |
3372 | { | |
3373 | p++; | |
3374 | if (num_operands_read == max_num_operands) | |
3375 | { | |
3376 | as_bad (_("too many operands to '%.*s'"), opc_len, str); | |
3377 | bad_operands = TRUE; | |
3378 | break; | |
3379 | } | |
3380 | continue; | |
3381 | } | |
3382 | else | |
3383 | /* Operand parsing should consume whole operands. */ | |
3384 | abort (); | |
3385 | } | |
3386 | ||
3387 | if (!bad_operands && !num_operands_permitted[num_operands_read]) | |
3388 | { | |
3389 | as_bad (_("bad number of operands to '%.*s'"), opc_len, str); | |
3390 | bad_operands = TRUE; | |
3391 | } | |
3392 | ||
3393 | if (!bad_operands) | |
3394 | { | |
3395 | /* Each operand is of the right syntactic form for some opcode | |
3396 | choice, and the number of operands is valid. Check that each | |
3397 | operand is OK in detail for some opcode choice with the right | |
3398 | number of operands. */ | |
3399 | unsigned int i; | |
3400 | ||
3401 | for (i = 0; i < num_operands_read; i++) | |
3402 | { | |
3403 | bfd_boolean coarse_ok = FALSE; | |
3404 | bfd_boolean fine_ok = FALSE; | |
3405 | tic6x_operand_match fine_failure = tic6x_match_matches; | |
3406 | unsigned int j; | |
3407 | ||
3408 | for (j = 0; j < num_matching_opcodes; j++) | |
3409 | { | |
3410 | tic6x_operand_form f; | |
3411 | tic6x_rw rw; | |
3412 | unsigned int cf; | |
3413 | tic6x_operand_match this_fine_failure; | |
3414 | ||
3415 | if (tic6x_opcode_table[opcm[j]].flags & TIC6X_FLAG_SPMASK) | |
3416 | { | |
3417 | f = tic6x_operand_func_unit; | |
3418 | rw = tic6x_rw_none; | |
3419 | } | |
3420 | else | |
3421 | { | |
3422 | if (tic6x_opcode_table[opcm[j]].num_operands | |
3423 | != num_operands_read) | |
3424 | continue; | |
3425 | ||
3426 | f = tic6x_opcode_table[opcm[j]].operand_info[i].form; | |
3427 | rw = tic6x_opcode_table[opcm[j]].operand_info[i].rw; | |
3428 | } | |
3429 | cf = tic6x_coarse_operand_form (f); | |
3430 | ||
3431 | if (operands[i].form != cf) | |
3432 | continue; | |
3433 | ||
3434 | coarse_ok = TRUE; | |
3435 | this_fine_failure | |
3436 | = tic6x_operand_matches_form (&operands[i], f, rw, | |
3437 | func_unit_side, | |
3438 | cross_side, | |
3439 | func_unit_data_side); | |
3440 | if (this_fine_failure == tic6x_match_matches) | |
3441 | { | |
3442 | fine_ok = TRUE; | |
3443 | break; | |
3444 | } | |
3445 | if (fine_failure == tic6x_match_matches | |
3446 | || fine_failure > this_fine_failure) | |
3447 | fine_failure = this_fine_failure; | |
3448 | } | |
3449 | ||
3450 | /* No instructions should have operand syntactic forms only | |
3451 | acceptable with certain numbers of operands, so no | |
3452 | diagnostic for this case. */ | |
3453 | if (!coarse_ok) | |
3454 | abort (); | |
3455 | ||
3456 | if (!fine_ok) | |
3457 | { | |
3458 | switch (fine_failure) | |
3459 | { | |
3460 | case tic6x_match_non_const: | |
3461 | as_bad (_("operand %u of '%.*s' not constant"), | |
3462 | i + 1, opc_len, str); | |
3463 | break; | |
3464 | ||
3465 | case tic6x_match_wrong_side: | |
3466 | as_bad (_("operand %u of '%.*s' on wrong side"), | |
3467 | i + 1, opc_len, str); | |
3468 | break; | |
3469 | ||
3470 | case tic6x_match_bad_return: | |
3471 | as_bad (_("operand %u of '%.*s' not a valid return " | |
3472 | "address register"), | |
3473 | i + 1, opc_len, str); | |
3474 | break; | |
3475 | ||
3476 | case tic6x_match_ctrl_write_only: | |
3477 | as_bad (_("operand %u of '%.*s' is write-only"), | |
3478 | i + 1, opc_len, str); | |
3479 | break; | |
3480 | ||
3481 | case tic6x_match_ctrl_read_only: | |
3482 | as_bad (_("operand %u of '%.*s' is read-only"), | |
3483 | i + 1, opc_len, str); | |
3484 | break; | |
3485 | ||
3486 | case tic6x_match_bad_mem: | |
3487 | as_bad (_("operand %u of '%.*s' not a valid memory " | |
3488 | "reference"), | |
3489 | i + 1, opc_len, str); | |
3490 | break; | |
3491 | ||
3492 | case tic6x_match_bad_address: | |
3493 | as_bad (_("operand %u of '%.*s' not a valid base " | |
3494 | "address register"), | |
3495 | i + 1, opc_len, str); | |
3496 | break; | |
3497 | ||
3498 | default: | |
3499 | abort (); | |
3500 | } | |
3501 | bad_operands = TRUE; | |
3502 | break; | |
3503 | } | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | if (!bad_operands) | |
3508 | { | |
3509 | /* Each operand is OK for some opcode choice, and the number of | |
3510 | operands is valid. Check whether there is an opcode choice | |
3511 | for which all operands are simultaneously valid. */ | |
3512 | unsigned int i; | |
3513 | bfd_boolean found_match = FALSE; | |
3514 | ||
3515 | for (i = 0; i < TIC6X_NUM_PREFER; i++) | |
3516 | opc_rank[i] = (unsigned int) -1; | |
3517 | ||
3518 | min_rank = TIC6X_NUM_PREFER - 1; | |
3519 | max_rank = 0; | |
3520 | ||
3521 | for (i = 0; i < num_matching_opcodes; i++) | |
3522 | { | |
3523 | unsigned int j; | |
3524 | bfd_boolean this_matches = TRUE; | |
3525 | ||
3526 | if (!(tic6x_opcode_table[opcm[i]].flags & TIC6X_FLAG_SPMASK) | |
3527 | && tic6x_opcode_table[opcm[i]].num_operands != num_operands_read) | |
3528 | continue; | |
3529 | ||
3530 | for (j = 0; j < num_operands_read; j++) | |
3531 | { | |
3532 | tic6x_operand_form f; | |
3533 | tic6x_rw rw; | |
3534 | ||
3535 | if (tic6x_opcode_table[opcm[i]].flags & TIC6X_FLAG_SPMASK) | |
3536 | { | |
3537 | f = tic6x_operand_func_unit; | |
3538 | rw = tic6x_rw_none; | |
3539 | } | |
3540 | else | |
3541 | { | |
3542 | f = tic6x_opcode_table[opcm[i]].operand_info[j].form; | |
3543 | rw = tic6x_opcode_table[opcm[i]].operand_info[j].rw; | |
3544 | } | |
3545 | if (tic6x_operand_matches_form (&operands[j], f, rw, | |
3546 | func_unit_side, | |
3547 | cross_side, | |
3548 | func_unit_data_side) | |
3549 | != tic6x_match_matches) | |
3550 | { | |
3551 | this_matches = FALSE; | |
3552 | break; | |
3553 | } | |
3554 | } | |
3555 | ||
3556 | if (this_matches) | |
3557 | { | |
3558 | int rank = TIC6X_PREFER_VAL (tic6x_opcode_table[opcm[i]].flags); | |
3559 | ||
3560 | if (rank < min_rank) | |
3561 | min_rank = rank; | |
3562 | if (rank > max_rank) | |
3563 | max_rank = rank; | |
3564 | ||
3565 | if (opc_rank[rank] == (unsigned int) -1) | |
3566 | opc_rank[rank] = i; | |
3567 | else | |
3568 | /* The opcode table should provide a total ordering | |
3569 | for all cases where multiple matches may get | |
3570 | here. */ | |
3571 | abort (); | |
3572 | ||
3573 | found_match = TRUE; | |
3574 | } | |
3575 | } | |
3576 | ||
3577 | if (!found_match) | |
3578 | { | |
3579 | as_bad (_("bad operand combination for '%.*s'"), opc_len, str); | |
3580 | bad_operands = TRUE; | |
3581 | } | |
3582 | } | |
3583 | ||
3584 | if (bad_operands) | |
3585 | { | |
3586 | free (opcm); | |
3587 | return; | |
3588 | } | |
3589 | ||
3590 | opcode_value = 0; | |
3591 | encoded_ok = FALSE; | |
3592 | for (try_rank = max_rank; try_rank >= min_rank; try_rank--) | |
3593 | { | |
3594 | fix_needed = FALSE; | |
3595 | ||
3596 | if (opc_rank[try_rank] == (unsigned int) -1) | |
3597 | continue; | |
3598 | ||
3599 | opcode_value = tic6x_try_encode (opcm[opc_rank[try_rank]], operands, | |
3600 | num_operands_read, this_line_creg, | |
3601 | this_line_z, func_unit_side, | |
3602 | func_unit_cross, func_unit_data_side, | |
3603 | seginfo->tc_segment_info_data.sploop_ii, | |
3604 | &fix_exp, &fix_pcrel, &fx_r_type, | |
3605 | &fix_adda, &fix_needed, &encoded_ok, | |
3606 | (try_rank == min_rank ? TRUE : FALSE), | |
3607 | str, opc_len); | |
3608 | if (encoded_ok) | |
3609 | { | |
3610 | opct = &tic6x_opcode_table[opcm[opc_rank[try_rank]]]; | |
3611 | break; | |
3612 | } | |
3613 | } | |
3614 | ||
3615 | free (opcm); | |
3616 | ||
3617 | if (!encoded_ok) | |
3618 | return; | |
3619 | ||
3620 | if (this_line_parallel) | |
3621 | { | |
d99e5b39 JM |
3622 | insn_frag = seginfo->tc_segment_info_data.execute_packet_frag; |
3623 | if (insn_frag == NULL) | |
40b36596 JM |
3624 | { |
3625 | as_bad (_("parallel instruction not following another instruction")); | |
3626 | return; | |
3627 | } | |
3628 | ||
d99e5b39 | 3629 | if (insn_frag->fr_fix >= 32) |
40b36596 JM |
3630 | { |
3631 | as_bad (_("too many instructions in execute packet")); | |
3632 | return; | |
3633 | } | |
3634 | ||
d99e5b39 | 3635 | if (this_insn_label_list != NULL) |
40b36596 JM |
3636 | as_bad (_("label not at start of execute packet")); |
3637 | ||
3638 | if (opct->flags & TIC6X_FLAG_FIRST) | |
3639 | as_bad (_("'%.*s' instruction not at start of execute packet"), | |
3640 | opc_len, str); | |
3641 | ||
3642 | *seginfo->tc_segment_info_data.last_insn_lsb |= 0x1; | |
d99e5b39 | 3643 | output = insn_frag->fr_literal + insn_frag->fr_fix; |
40b36596 JM |
3644 | } |
3645 | else | |
3646 | { | |
d99e5b39 JM |
3647 | tic6x_label_list *l; |
3648 | ||
40b36596 | 3649 | seginfo->tc_segment_info_data.spmask_addr = NULL; |
38bd8d09 | 3650 | seginfo->tc_segment_info_data.func_units_used = 0; |
d99e5b39 JM |
3651 | |
3652 | /* Start a new frag for this execute packet. */ | |
3653 | if (frag_now_fix () != 0) | |
3654 | { | |
3655 | if (frag_now->fr_type != rs_machine_dependent) | |
3656 | frag_wane (frag_now); | |
3657 | ||
3658 | frag_new (0); | |
3659 | } | |
3660 | frag_grow (32); | |
3661 | insn_frag = seginfo->tc_segment_info_data.execute_packet_frag = frag_now; | |
3662 | for (l = this_insn_label_list; l; l = l->next) | |
3663 | { | |
3664 | symbol_set_frag (l->label, frag_now); | |
3665 | S_SET_VALUE (l->label, 0); | |
3666 | S_SET_SEGMENT (l->label, now_seg); | |
3667 | } | |
3668 | tic6x_free_label_list (this_insn_label_list); | |
3669 | dwarf2_emit_insn (0); | |
3670 | output = frag_var (rs_machine_dependent, 32, 32, 0, NULL, 0, NULL); | |
3671 | /* This must be the same as the frag to which a pointer was just | |
3672 | saved. */ | |
3673 | if (output != insn_frag->fr_literal) | |
3674 | abort (); | |
3675 | insn_frag->tc_frag_data.is_insns = TRUE; | |
3676 | insn_frag->tc_frag_data.can_cross_fp_boundary | |
3677 | = tic6x_can_cross_fp_boundary; | |
40b36596 JM |
3678 | } |
3679 | ||
38bd8d09 JM |
3680 | if (func_unit_base != tic6x_func_unit_nfu) |
3681 | { | |
3682 | unsigned int func_unit_enc; | |
3683 | ||
3684 | func_unit_enc = tic6x_encode_spmask (func_unit_base, func_unit_side); | |
3685 | ||
3686 | if (seginfo->tc_segment_info_data.func_units_used & func_unit_enc) | |
3687 | as_bad (_("functional unit already used in this execute packet")); | |
3688 | ||
3689 | seginfo->tc_segment_info_data.func_units_used |= func_unit_enc; | |
3690 | } | |
3691 | ||
40b36596 JM |
3692 | if (opct->flags & TIC6X_FLAG_SPLOOP) |
3693 | { | |
3694 | if (seginfo->tc_segment_info_data.sploop_ii) | |
3695 | as_bad (_("nested software pipelined loop")); | |
3696 | if (num_operands_read != 1 | |
3697 | || operands[0].form != TIC6X_OP_EXP | |
3698 | || operands[0].value.exp.X_op != O_constant) | |
3699 | abort (); | |
3700 | seginfo->tc_segment_info_data.sploop_ii | |
3701 | = operands[0].value.exp.X_add_number; | |
3702 | } | |
3703 | else if (opct->flags & TIC6X_FLAG_SPKERNEL) | |
3704 | { | |
3705 | if (!seginfo->tc_segment_info_data.sploop_ii) | |
3706 | as_bad (_("'%.*s' instruction not in a software pipelined loop"), | |
3707 | opc_len, str); | |
3708 | seginfo->tc_segment_info_data.sploop_ii = 0; | |
3709 | } | |
3710 | ||
3711 | if (this_line_spmask) | |
3712 | { | |
3713 | if (seginfo->tc_segment_info_data.spmask_addr == NULL) | |
3714 | as_bad (_("'||^' without previous SPMASK")); | |
3715 | else if (func_unit_base == tic6x_func_unit_nfu) | |
3716 | as_bad (_("cannot mask instruction using no functional unit")); | |
3717 | else | |
3718 | { | |
3719 | unsigned int spmask_opcode; | |
3720 | unsigned int mask_bit; | |
3721 | ||
3722 | spmask_opcode | |
3723 | = md_chars_to_number (seginfo->tc_segment_info_data.spmask_addr, | |
3724 | 4); | |
3725 | mask_bit = tic6x_encode_spmask (func_unit_base, func_unit_side); | |
3726 | mask_bit <<= 18; | |
3727 | if (spmask_opcode & mask_bit) | |
3728 | as_bad (_("functional unit already masked")); | |
3729 | spmask_opcode |= mask_bit; | |
3730 | md_number_to_chars (seginfo->tc_segment_info_data.spmask_addr, | |
3731 | spmask_opcode, 4); | |
3732 | } | |
3733 | } | |
3734 | ||
3735 | record_alignment (now_seg, 5); | |
40b36596 JM |
3736 | md_number_to_chars (output, opcode_value, 4); |
3737 | if (fix_needed) | |
d99e5b39 | 3738 | tic6x_fix_new_exp (insn_frag, output - insn_frag->fr_literal, 4, fix_exp, |
40b36596 | 3739 | fix_pcrel, fx_r_type, fix_adda); |
d99e5b39 JM |
3740 | insn_frag->fr_fix += 4; |
3741 | insn_frag->fr_var -= 4; | |
40b36596 JM |
3742 | seginfo->tc_segment_info_data.last_insn_lsb |
3743 | = (target_big_endian ? output + 3 : output); | |
3744 | if (opct->flags & TIC6X_FLAG_SPMASK) | |
3745 | seginfo->tc_segment_info_data.spmask_addr = output; | |
40b36596 JM |
3746 | } |
3747 | ||
3748 | /* Modify NEWVAL (32-bit) by inserting VALUE, shifted right by SHIFT | |
3749 | and the least significant BITS bits taken, at position POS. */ | |
3750 | #define MODIFY_VALUE(NEWVAL, VALUE, SHIFT, POS, BITS) \ | |
3751 | do { \ | |
3752 | (NEWVAL) &= 0xffffffffU & ~(((1U << (BITS)) - 1) << (POS)); \ | |
3753 | (NEWVAL) |= (((VALUE) >> (SHIFT)) & ((1U << (BITS)) - 1)) << (POS); \ | |
3754 | } while (0) | |
3755 | ||
3756 | /* Apply a fixup to the object file. */ | |
3757 | ||
3758 | void | |
3759 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) | |
3760 | { | |
3761 | offsetT value = *valP; | |
3762 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
3763 | ||
3764 | value = SEXT (value); | |
3765 | *valP = value; | |
3766 | ||
3767 | fixP->fx_offset = SEXT (fixP->fx_offset); | |
3768 | ||
3769 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
3770 | fixP->fx_done = 1; | |
3771 | ||
3772 | /* We do our own overflow checks. */ | |
3773 | fixP->fx_no_overflow = 1; | |
3774 | ||
3775 | switch (fixP->fx_r_type) | |
3776 | { | |
3777 | case BFD_RELOC_NONE: | |
2fbb87f6 | 3778 | case BFD_RELOC_C6000_EHTYPE: |
40b36596 JM |
3779 | /* Force output to the object file. */ |
3780 | fixP->fx_done = 0; | |
3781 | break; | |
3782 | ||
3783 | case BFD_RELOC_32: | |
3784 | if (fixP->fx_done || !seg->use_rela_p) | |
3785 | md_number_to_chars (buf, value, 4); | |
3786 | break; | |
3787 | ||
3788 | case BFD_RELOC_16: | |
3789 | if (fixP->fx_done || !seg->use_rela_p) | |
3790 | { | |
3791 | if (value < -0x8000 || value > 0xffff) | |
3792 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3793 | _("value too large for 2-byte field")); | |
3794 | md_number_to_chars (buf, value, 2); | |
3795 | } | |
3796 | break; | |
3797 | ||
3798 | case BFD_RELOC_8: | |
3799 | if (fixP->fx_done || !seg->use_rela_p) | |
3800 | { | |
3801 | if (value < -0x80 || value > 0xff) | |
3802 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3803 | _("value too large for 1-byte field")); | |
3804 | md_number_to_chars (buf, value, 1); | |
3805 | } | |
3806 | break; | |
3807 | ||
3808 | case BFD_RELOC_C6000_ABS_S16: | |
3809 | case BFD_RELOC_C6000_ABS_L16: | |
3810 | case BFD_RELOC_C6000_SBR_S16: | |
3811 | case BFD_RELOC_C6000_SBR_L16_B: | |
3812 | case BFD_RELOC_C6000_SBR_L16_H: | |
3813 | case BFD_RELOC_C6000_SBR_L16_W: | |
3814 | case BFD_RELOC_C6000_SBR_GOT_L16_W: | |
3815 | if (fixP->fx_done || !seg->use_rela_p) | |
3816 | { | |
3817 | offsetT newval = md_chars_to_number (buf, 4); | |
41820509 JM |
3818 | int shift; |
3819 | ||
3820 | switch (fixP->fx_r_type) | |
3821 | { | |
3822 | case BFD_RELOC_C6000_SBR_L16_H: | |
3823 | shift = 1; | |
3824 | break; | |
3825 | ||
3826 | case BFD_RELOC_C6000_SBR_L16_W: | |
3827 | case BFD_RELOC_C6000_SBR_GOT_L16_W: | |
3828 | shift = 2; | |
3829 | break; | |
3830 | ||
3831 | default: | |
3832 | shift = 0; | |
3833 | break; | |
3834 | } | |
40b36596 | 3835 | |
41820509 | 3836 | MODIFY_VALUE (newval, value, shift, 7, 16); |
40b36596 JM |
3837 | if ((value < -0x8000 || value > 0x7fff) |
3838 | && (fixP->fx_r_type == BFD_RELOC_C6000_ABS_S16 | |
3839 | || fixP->fx_r_type == BFD_RELOC_C6000_SBR_S16)) | |
3840 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3841 | _("immediate offset out of range")); | |
3842 | ||
3843 | md_number_to_chars (buf, newval, 4); | |
3844 | } | |
3845 | if (fixP->fx_done | |
3846 | && fixP->fx_r_type != BFD_RELOC_C6000_ABS_S16 | |
3847 | && fixP->fx_r_type != BFD_RELOC_C6000_ABS_L16) | |
3848 | abort (); | |
3849 | break; | |
3850 | ||
3851 | case BFD_RELOC_C6000_ABS_H16: | |
3852 | case BFD_RELOC_C6000_SBR_H16_B: | |
3853 | case BFD_RELOC_C6000_SBR_H16_H: | |
3854 | case BFD_RELOC_C6000_SBR_H16_W: | |
3855 | case BFD_RELOC_C6000_SBR_GOT_H16_W: | |
3856 | if (fixP->fx_done || !seg->use_rela_p) | |
3857 | { | |
3858 | offsetT newval = md_chars_to_number (buf, 4); | |
41820509 JM |
3859 | int shift; |
3860 | ||
3861 | switch (fixP->fx_r_type) | |
3862 | { | |
3863 | case BFD_RELOC_C6000_SBR_H16_H: | |
3864 | shift = 17; | |
3865 | break; | |
3866 | ||
3867 | case BFD_RELOC_C6000_SBR_H16_W: | |
3868 | case BFD_RELOC_C6000_SBR_GOT_H16_W: | |
3869 | shift = 18; | |
3870 | break; | |
40b36596 | 3871 | |
41820509 JM |
3872 | default: |
3873 | shift = 16; | |
3874 | break; | |
3875 | } | |
3876 | ||
3877 | MODIFY_VALUE (newval, value, shift, 7, 16); | |
40b36596 JM |
3878 | |
3879 | md_number_to_chars (buf, newval, 4); | |
3880 | } | |
3881 | if (fixP->fx_done && fixP->fx_r_type != BFD_RELOC_C6000_ABS_H16) | |
3882 | abort (); | |
3883 | break; | |
3884 | ||
4a732032 BS |
3885 | case BFD_RELOC_C6000_PCR_H16: |
3886 | case BFD_RELOC_C6000_PCR_L16: | |
3887 | if (fixP->fx_done || !seg->use_rela_p) | |
3888 | { | |
3889 | offsetT newval = md_chars_to_number (buf, 4); | |
3890 | int shift = fixP->fx_r_type == BFD_RELOC_C6000_PCR_H16 ? 16 : 0; | |
3891 | ||
3892 | MODIFY_VALUE (newval, value, shift, 7, 16); | |
3893 | ||
3894 | md_number_to_chars (buf, newval, 4); | |
3895 | } | |
3896 | break; | |
3897 | ||
40b36596 JM |
3898 | case BFD_RELOC_C6000_SBR_U15_B: |
3899 | if (fixP->fx_done || !seg->use_rela_p) | |
3900 | { | |
3901 | offsetT newval = md_chars_to_number (buf, 4); | |
3902 | ||
3903 | MODIFY_VALUE (newval, value, 0, 8, 15); | |
3904 | if (value < 0 || value > 0x7fff) | |
3905 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3906 | _("immediate offset out of range")); | |
3907 | ||
3908 | md_number_to_chars (buf, newval, 4); | |
3909 | } | |
3910 | break; | |
3911 | ||
3912 | case BFD_RELOC_C6000_SBR_U15_H: | |
3913 | if (fixP->fx_done || !seg->use_rela_p) | |
3914 | { | |
3915 | offsetT newval = md_chars_to_number (buf, 4); | |
3916 | ||
3917 | /* Constant ADDA operands, processed as constant when the | |
3918 | instruction is parsed, are encoded as-is rather than | |
3919 | shifted. If the operand of an ADDA instruction is now | |
3920 | constant (for example, the difference between two labels | |
3921 | found after the instruction), ensure it is encoded the | |
3922 | same way it would have been if the constant value had | |
3923 | been known when the instruction was parsed. */ | |
3924 | if (fixP->tc_fix_data.fix_adda && fixP->fx_done) | |
3925 | value <<= 1; | |
3926 | ||
3927 | MODIFY_VALUE (newval, value, 1, 8, 15); | |
3928 | if (value & 1) | |
3929 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3930 | _("immediate offset not 2-byte-aligned")); | |
3931 | if (value < 0 || value > 0xfffe) | |
3932 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3933 | _("immediate offset out of range")); | |
3934 | ||
3935 | md_number_to_chars (buf, newval, 4); | |
3936 | } | |
3937 | break; | |
3938 | ||
3939 | case BFD_RELOC_C6000_SBR_U15_W: | |
3940 | case BFD_RELOC_C6000_SBR_GOT_U15_W: | |
3941 | if (fixP->fx_done || !seg->use_rela_p) | |
3942 | { | |
3943 | offsetT newval = md_chars_to_number (buf, 4); | |
3944 | ||
3945 | /* Constant ADDA operands, processed as constant when the | |
3946 | instruction is parsed, are encoded as-is rather than | |
3947 | shifted. If the operand of an ADDA instruction is now | |
3948 | constant (for example, the difference between two labels | |
3949 | found after the instruction), ensure it is encoded the | |
3950 | same way it would have been if the constant value had | |
3951 | been known when the instruction was parsed. */ | |
3952 | if (fixP->tc_fix_data.fix_adda && fixP->fx_done) | |
3953 | value <<= 2; | |
3954 | ||
3955 | MODIFY_VALUE (newval, value, 2, 8, 15); | |
3956 | if (value & 3) | |
3957 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3958 | _("immediate offset not 4-byte-aligned")); | |
3959 | if (value < 0 || value > 0x1fffc) | |
3960 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3961 | _("immediate offset out of range")); | |
3962 | ||
3963 | md_number_to_chars (buf, newval, 4); | |
3964 | } | |
3965 | if (fixP->fx_done && fixP->fx_r_type != BFD_RELOC_C6000_SBR_U15_W) | |
3966 | abort (); | |
3967 | break; | |
3968 | ||
3969 | case BFD_RELOC_C6000_DSBT_INDEX: | |
3970 | if (value != 0) | |
3971 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3972 | _("addend used with $DSBT_INDEX")); | |
3973 | if (fixP->fx_done) | |
3974 | abort (); | |
3975 | break; | |
3976 | ||
3977 | case BFD_RELOC_C6000_PCR_S21: | |
3978 | if (fixP->fx_done || !seg->use_rela_p) | |
3979 | { | |
3980 | offsetT newval = md_chars_to_number (buf, 4); | |
3981 | ||
3982 | MODIFY_VALUE (newval, value, 2, 7, 21); | |
3983 | ||
3984 | if (value & 3) | |
3985 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3986 | _("PC-relative offset not 4-byte-aligned")); | |
3987 | if (value < -0x400000 || value > 0x3ffffc) | |
3988 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3989 | _("PC-relative offset out of range")); | |
3990 | ||
3991 | md_number_to_chars (buf, newval, 4); | |
3992 | } | |
3993 | break; | |
3994 | ||
3995 | case BFD_RELOC_C6000_PCR_S12: | |
3996 | if (fixP->fx_done || !seg->use_rela_p) | |
3997 | { | |
3998 | offsetT newval = md_chars_to_number (buf, 4); | |
3999 | ||
4000 | MODIFY_VALUE (newval, value, 2, 16, 12); | |
4001 | ||
4002 | if (value & 3) | |
4003 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4004 | _("PC-relative offset not 4-byte-aligned")); | |
4005 | if (value < -0x2000 || value > 0x1ffc) | |
4006 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4007 | _("PC-relative offset out of range")); | |
4008 | ||
4009 | md_number_to_chars (buf, newval, 4); | |
4010 | } | |
4011 | break; | |
4012 | ||
4013 | case BFD_RELOC_C6000_PCR_S10: | |
4014 | if (fixP->fx_done || !seg->use_rela_p) | |
4015 | { | |
4016 | offsetT newval = md_chars_to_number (buf, 4); | |
4017 | ||
4018 | MODIFY_VALUE (newval, value, 2, 13, 10); | |
4019 | ||
4020 | if (value & 3) | |
4021 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4022 | _("PC-relative offset not 4-byte-aligned")); | |
4023 | if (value < -0x800 || value > 0x7fc) | |
4024 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4025 | _("PC-relative offset out of range")); | |
4026 | ||
4027 | md_number_to_chars (buf, newval, 4); | |
4028 | } | |
4029 | break; | |
4030 | ||
4031 | case BFD_RELOC_C6000_PCR_S7: | |
4032 | if (fixP->fx_done || !seg->use_rela_p) | |
4033 | { | |
4034 | offsetT newval = md_chars_to_number (buf, 4); | |
4035 | ||
4036 | MODIFY_VALUE (newval, value, 2, 16, 7); | |
4037 | ||
4038 | if (value & 3) | |
4039 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4040 | _("PC-relative offset not 4-byte-aligned")); | |
4041 | if (value < -0x100 || value > 0xfc) | |
4042 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4043 | _("PC-relative offset out of range")); | |
4044 | ||
4045 | md_number_to_chars (buf, newval, 4); | |
4046 | } | |
4047 | break; | |
4048 | ||
1bce6bd8 PB |
4049 | case BFD_RELOC_C6000_PREL31: |
4050 | /* Force output to the object file. */ | |
4051 | fixP->fx_done = 0; | |
4052 | break; | |
4053 | ||
40b36596 JM |
4054 | default: |
4055 | abort (); | |
4056 | } | |
4057 | } | |
4058 | ||
4059 | /* Convert a floating-point number to target (IEEE) format. */ | |
4060 | ||
4061 | char * | |
4062 | md_atof (int type, char *litP, int *sizeP) | |
4063 | { | |
4064 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
4065 | } | |
4066 | ||
d99e5b39 JM |
4067 | /* Adjust the frags in SECTION (see tic6x_end). */ |
4068 | ||
4069 | static void | |
4070 | tic6x_adjust_section (bfd *abfd ATTRIBUTE_UNUSED, segT section, | |
4071 | void *dummy ATTRIBUTE_UNUSED) | |
4072 | { | |
4073 | segment_info_type *info; | |
4074 | frchainS *frchp; | |
4075 | fragS *fragp; | |
4076 | bfd_boolean have_code = FALSE; | |
4077 | bfd_boolean have_non_code = FALSE; | |
4078 | ||
4079 | info = seg_info (section); | |
4080 | if (info == NULL) | |
4081 | return; | |
4082 | ||
4083 | for (frchp = info->frchainP; frchp; frchp = frchp->frch_next) | |
4084 | for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next) | |
4085 | switch (fragp->fr_type) | |
4086 | { | |
4087 | case rs_machine_dependent: | |
4088 | if (fragp->tc_frag_data.is_insns) | |
4089 | have_code = TRUE; | |
4090 | break; | |
4091 | ||
4092 | case rs_dummy: | |
4093 | case rs_fill: | |
4094 | if (fragp->fr_fix > 0) | |
4095 | have_non_code = TRUE; | |
4096 | break; | |
4097 | ||
4098 | default: | |
4099 | have_non_code = TRUE; | |
4100 | break; | |
4101 | } | |
4102 | ||
4103 | /* Process alignment requirements in a code-only section. */ | |
4104 | if (have_code && !have_non_code) | |
4105 | { | |
4106 | /* If we need to insert an odd number of instructions to meet an | |
4107 | alignment requirement, there must have been an odd number of | |
4108 | instructions since the last 8-byte-aligned execute packet | |
4109 | boundary. So there must have been an execute packet with an | |
4110 | odd number (and so a number fewer than 8) of instructions | |
4111 | into which we can insert a NOP without breaking any previous | |
4112 | alignments. | |
4113 | ||
4114 | If then we need to insert a number 2 mod 4 of instructions, | |
4115 | the number of instructions since the last 16-byte-aligned | |
4116 | execute packet boundary must be 2 mod 4. So between that | |
4117 | boundary and the following 8-byte-aligned boundary there must | |
4118 | either be at least one execute packet with 2-mod-4 | |
4119 | instructions, or at least two with an odd number of | |
4120 | instructions; again, greedily inserting NOPs as soon as | |
4121 | possible suffices to meet the alignment requirement. | |
4122 | ||
4123 | If then we need to insert 4 instructions, we look between the | |
4124 | last 32-byte-aligned boundary and the following | |
4125 | 16-byte-aligned boundary. The sizes of the execute packets | |
4126 | in this range total 4 instructions mod 8, so again there is | |
4127 | room for greedy insertion of NOPs to meet the alignment | |
4128 | requirement, and before any intermediate point with 8-byte | |
4129 | (2-instruction) alignment requirement the sizes of execute | |
4130 | packets (and so the room for NOPs) will total 2 instructions | |
4131 | mod 4 so greedy insertion will not break such alignments. | |
4132 | ||
4133 | So we can always meet these alignment requirements by | |
4134 | inserting NOPs in parallel with existing execute packets, and | |
4135 | by induction the approach described above inserts the minimum | |
4136 | number of such NOPs. */ | |
4137 | ||
4138 | /* The number of NOPs we are currently looking to insert, if we | |
4139 | have gone back to insert NOPs. */ | |
4140 | unsigned int want_insert = 0; | |
4141 | ||
4142 | /* Out of that number, the number inserted so far in the current | |
4143 | stage of the above algorithm. */ | |
4144 | unsigned int want_insert_done_so_far = 0; | |
4145 | ||
4146 | /* The position mod 32 at the start of the current frag. */ | |
4147 | unsigned int pos = 0; | |
4148 | ||
4149 | /* The locations in the frag chain of the most recent frags at | |
4150 | the start of which there is the given alignment. */ | |
4151 | frchainS *frchp_last32, *frchp_last16, *frchp_last8; | |
4152 | fragS *fragp_last32, *fragp_last16, *fragp_last8; | |
4153 | unsigned int pos_last32, pos_last16, pos_last8; | |
4154 | ||
4155 | frchp_last32 = frchp_last16 = frchp_last8 = info->frchainP; | |
4156 | fragp_last32 = fragp_last16 = fragp_last8 = info->frchainP->frch_root; | |
4157 | pos_last32 = pos_last16 = pos_last8 = 0; | |
4158 | ||
4159 | for (frchp = info->frchainP; frchp; frchp = frchp->frch_next) | |
4160 | for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next) | |
4161 | look_at_frag: | |
4162 | { | |
4163 | bfd_boolean go_back = FALSE; | |
4164 | frchainS *frchp_next; | |
4165 | fragS *fragp_next; | |
4166 | ||
4167 | if (fragp->fr_type != rs_machine_dependent) | |
4168 | continue; | |
4169 | ||
4170 | if (fragp->tc_frag_data.is_insns | |
4171 | && pos + fragp->fr_fix > 32 | |
4172 | && !fragp->tc_frag_data.can_cross_fp_boundary) | |
4173 | { | |
4174 | /* As described above, we should always have met an | |
4175 | alignment requirement by the time we come back to | |
4176 | it. */ | |
4177 | if (want_insert) | |
4178 | abort (); | |
4179 | ||
4180 | if (pos & 3) | |
4181 | abort (); | |
4182 | want_insert = (32 - pos) >> 2; | |
4183 | if (want_insert > 7) | |
4184 | abort (); | |
4185 | want_insert_done_so_far = 0; | |
4186 | go_back = TRUE; | |
4187 | } | |
4188 | ||
4189 | if (!fragp->tc_frag_data.is_insns) | |
4190 | { | |
4191 | unsigned int would_insert_bytes; | |
4192 | ||
4193 | if (!(pos & ((1 << fragp->fr_offset) - 1))) | |
4194 | /* This alignment requirement is already met. */ | |
4195 | continue; | |
4196 | ||
4197 | /* As described above, we should always have met an | |
4198 | alignment requirement by the time we come back to | |
4199 | it. */ | |
4200 | if (want_insert) | |
4201 | abort (); | |
4202 | ||
4203 | /* We may not be able to meet this requirement within | |
4204 | the given number of characters. */ | |
4205 | would_insert_bytes | |
4206 | = ((1 << fragp->fr_offset) | |
4207 | - (pos & ((1 << fragp->fr_offset) - 1))); | |
4208 | ||
4209 | if (fragp->fr_subtype != 0 | |
4210 | && would_insert_bytes > fragp->fr_subtype) | |
4211 | continue; | |
4212 | ||
4213 | /* An unmet alignment must be 8, 16 or 32 bytes; | |
4214 | smaller ones must always be met within code-only | |
4215 | sections and larger ones cause the section not to | |
4216 | be code-only. */ | |
4217 | if (fragp->fr_offset != 3 | |
4218 | && fragp->fr_offset != 4 | |
4219 | && fragp->fr_offset != 5) | |
4220 | abort (); | |
4221 | ||
4222 | if (would_insert_bytes & 3) | |
4223 | abort (); | |
4224 | want_insert = would_insert_bytes >> 2; | |
4225 | if (want_insert > 7) | |
4226 | abort (); | |
4227 | want_insert_done_so_far = 0; | |
4228 | go_back = TRUE; | |
4229 | } | |
4230 | else if (want_insert && !go_back) | |
4231 | { | |
4232 | unsigned int num_insns = fragp->fr_fix >> 2; | |
4233 | unsigned int max_poss_nops = 8 - num_insns; | |
4234 | ||
4235 | if (max_poss_nops) | |
4236 | { | |
4237 | unsigned int cur_want_nops, max_want_nops, do_nops, i; | |
4238 | ||
4239 | if (want_insert & 1) | |
4240 | cur_want_nops = 1; | |
4241 | else if (want_insert & 2) | |
4242 | cur_want_nops = 2; | |
4243 | else if (want_insert & 4) | |
4244 | cur_want_nops = 4; | |
4245 | else | |
4246 | abort (); | |
4247 | ||
4248 | max_want_nops = cur_want_nops - want_insert_done_so_far; | |
4249 | ||
4250 | do_nops = (max_poss_nops < max_want_nops | |
4251 | ? max_poss_nops | |
4252 | : max_want_nops); | |
4253 | for (i = 0; i < do_nops; i++) | |
4254 | { | |
4255 | md_number_to_chars (fragp->fr_literal + fragp->fr_fix, | |
4256 | 0, 4); | |
4257 | if (target_big_endian) | |
4258 | fragp->fr_literal[fragp->fr_fix - 1] |= 0x1; | |
4259 | else | |
4260 | fragp->fr_literal[fragp->fr_fix - 4] |= 0x1; | |
4261 | fragp->fr_fix += 4; | |
4262 | fragp->fr_var -= 4; | |
4263 | } | |
4264 | want_insert_done_so_far += do_nops; | |
4265 | if (want_insert_done_so_far == cur_want_nops) | |
4266 | { | |
4267 | want_insert -= want_insert_done_so_far; | |
4268 | want_insert_done_so_far = 0; | |
4269 | if (want_insert) | |
4270 | go_back = TRUE; | |
4271 | } | |
4272 | } | |
4273 | } | |
4274 | if (go_back) | |
4275 | { | |
4276 | if (want_insert & 1) | |
4277 | { | |
4278 | frchp = frchp_last8; | |
4279 | fragp = fragp_last8; | |
4280 | pos = pos_last8; | |
4281 | } | |
4282 | else if (want_insert & 2) | |
4283 | { | |
4284 | frchp = frchp_last8 = frchp_last16; | |
4285 | fragp = fragp_last8 = fragp_last16; | |
4286 | pos = pos_last8 = pos_last16; | |
4287 | } | |
4288 | else if (want_insert & 4) | |
4289 | { | |
4290 | frchp = frchp_last8 = frchp_last16 = frchp_last32; | |
4291 | fragp = fragp_last8 = fragp_last16 = fragp_last32; | |
4292 | pos = pos_last8 = pos_last16 = pos_last32; | |
4293 | } | |
4294 | else | |
4295 | abort (); | |
4296 | ||
4297 | goto look_at_frag; | |
4298 | } | |
4299 | ||
4300 | /* Update current position for moving past a code | |
4301 | frag. */ | |
4302 | pos += fragp->fr_fix; | |
4303 | pos &= 31; | |
4304 | frchp_next = frchp; | |
4305 | fragp_next = fragp->fr_next; | |
4306 | if (fragp_next == NULL) | |
4307 | { | |
4308 | frchp_next = frchp->frch_next; | |
4309 | if (frchp_next != NULL) | |
4310 | fragp_next = frchp_next->frch_root; | |
4311 | } | |
4312 | if (!(pos & 7)) | |
4313 | { | |
4314 | frchp_last8 = frchp_next; | |
4315 | fragp_last8 = fragp_next; | |
4316 | pos_last8 = pos; | |
4317 | } | |
4318 | if (!(pos & 15)) | |
4319 | { | |
4320 | frchp_last16 = frchp_next; | |
4321 | fragp_last16 = fragp_next; | |
4322 | pos_last16 = pos; | |
4323 | } | |
4324 | if (!(pos & 31)) | |
4325 | { | |
4326 | frchp_last32 = frchp_next; | |
4327 | fragp_last32 = fragp_next; | |
4328 | pos_last32 = pos; | |
4329 | } | |
4330 | } | |
4331 | } | |
4332 | ||
4333 | /* Now convert the machine-dependent frags to machine-independent | |
4334 | ones. */ | |
4335 | for (frchp = info->frchainP; frchp; frchp = frchp->frch_next) | |
4336 | for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next) | |
4337 | { | |
4338 | if (fragp->fr_type == rs_machine_dependent) | |
4339 | { | |
4340 | if (fragp->tc_frag_data.is_insns) | |
4341 | frag_wane (fragp); | |
4342 | else | |
4343 | { | |
4344 | fragp->fr_type = rs_align_code; | |
4345 | fragp->fr_var = 1; | |
4346 | *fragp->fr_literal = 0; | |
4347 | } | |
4348 | } | |
4349 | } | |
4350 | } | |
4351 | ||
4352 | /* Initialize the machine-dependent parts of a frag. */ | |
4353 | ||
4354 | void | |
4355 | tic6x_frag_init (fragS *fragp) | |
4356 | { | |
4357 | fragp->tc_frag_data.is_insns = FALSE; | |
4358 | fragp->tc_frag_data.can_cross_fp_boundary = FALSE; | |
4359 | } | |
4360 | ||
59e6276b JM |
4361 | /* Set an attribute if it has not already been set by the user. */ |
4362 | ||
4363 | static void | |
4364 | tic6x_set_attribute_int (int tag, int value) | |
4365 | { | |
4366 | if (tag < 1 | |
4367 | || tag >= NUM_KNOWN_OBJ_ATTRIBUTES) | |
4368 | abort (); | |
4369 | if (!tic6x_attributes_set_explicitly[tag]) | |
4370 | bfd_elf_add_proc_attr_int (stdoutput, tag, value); | |
4371 | } | |
4372 | ||
4373 | /* Set object attributes deduced from the input file and command line | |
4374 | rather than given explicitly. */ | |
4375 | static void | |
4376 | tic6x_set_attributes (void) | |
4377 | { | |
75fa6dc1 JM |
4378 | if (tic6x_arch_attribute == C6XABI_Tag_ISA_none) |
4379 | tic6x_arch_attribute = C6XABI_Tag_ISA_C674X; | |
59e6276b | 4380 | |
75fa6dc1 | 4381 | tic6x_set_attribute_int (Tag_ISA, tic6x_arch_attribute); |
b5593623 | 4382 | tic6x_set_attribute_int (Tag_ABI_DSBT, tic6x_dsbt); |
87779176 JM |
4383 | tic6x_set_attribute_int (Tag_ABI_PID, tic6x_pid); |
4384 | tic6x_set_attribute_int (Tag_ABI_PIC, tic6x_pic); | |
59e6276b JM |
4385 | } |
4386 | ||
d99e5b39 JM |
4387 | /* Do machine-dependent manipulations of the frag chains after all |
4388 | input has been read and before the machine-independent sizing and | |
4389 | relaxing. */ | |
4390 | ||
4391 | void | |
4392 | tic6x_end (void) | |
4393 | { | |
59e6276b JM |
4394 | /* Set object attributes at this point if not explicitly set. */ |
4395 | tic6x_set_attributes (); | |
4396 | ||
d99e5b39 JM |
4397 | /* Meeting alignment requirements may require inserting NOPs in |
4398 | parallel in execute packets earlier in the segment. Future | |
4399 | 16-bit instruction generation involves whole-segment optimization | |
4400 | to determine the best choice and ordering of 32-bit or 16-bit | |
4401 | instructions. This doesn't fit will in the general relaxation | |
4402 | framework, so handle alignment and 16-bit instruction generation | |
4403 | here. */ | |
4404 | bfd_map_over_sections (stdoutput, tic6x_adjust_section, NULL); | |
4405 | } | |
4406 | ||
4407 | /* No machine-dependent frags at this stage; all converted in | |
4408 | tic6x_end. */ | |
40b36596 JM |
4409 | |
4410 | void | |
4411 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec ATTRIBUTE_UNUSED, | |
4412 | fragS *fragp ATTRIBUTE_UNUSED) | |
4413 | { | |
4414 | abort (); | |
4415 | } | |
4416 | ||
d99e5b39 JM |
4417 | /* No machine-dependent frags at this stage; all converted in |
4418 | tic6x_end. */ | |
40b36596 JM |
4419 | |
4420 | int | |
4421 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, | |
4422 | segT seg ATTRIBUTE_UNUSED) | |
4423 | { | |
4424 | abort (); | |
4425 | } | |
4426 | ||
4427 | /* Put a number into target byte order. */ | |
4428 | ||
4429 | void | |
4430 | md_number_to_chars (char *buf, valueT val, int n) | |
4431 | { | |
4432 | if (target_big_endian) | |
4433 | number_to_chars_bigendian (buf, val, n); | |
4434 | else | |
4435 | number_to_chars_littleendian (buf, val, n); | |
4436 | } | |
4437 | ||
4438 | /* Machine-dependent operand parsing not currently needed. */ | |
4439 | ||
4440 | void | |
4441 | md_operand (expressionS *op ATTRIBUTE_UNUSED) | |
4442 | { | |
4443 | } | |
4444 | ||
4445 | /* PC-relative operands are relative to the start of the fetch | |
4446 | packet. */ | |
4447 | ||
4448 | long | |
41820509 | 4449 | tic6x_pcrel_from_section (fixS *fixp, segT sec) |
40b36596 | 4450 | { |
41820509 JM |
4451 | if (fixp->fx_addsy != NULL |
4452 | && (!S_IS_DEFINED (fixp->fx_addsy) | |
4453 | || S_GET_SEGMENT (fixp->fx_addsy) != sec)) | |
4454 | return 0; | |
40b36596 JM |
4455 | return (fixp->fx_where + fixp->fx_frag->fr_address) & ~(long) 0x1f; |
4456 | } | |
4457 | ||
4458 | /* Round up a section size to the appropriate boundary. */ | |
4459 | ||
4460 | valueT | |
4461 | md_section_align (segT segment ATTRIBUTE_UNUSED, | |
4462 | valueT size) | |
4463 | { | |
4464 | /* Round up section sizes to ensure that text sections consist of | |
4465 | whole fetch packets. */ | |
4466 | int align = bfd_get_section_alignment (stdoutput, segment); | |
4467 | return ((size + (1 << align) - 1) & ((valueT) -1 << align)); | |
4468 | } | |
4469 | ||
4470 | /* No special undefined symbol handling needed for now. */ | |
4471 | ||
4472 | symbolS * | |
4473 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
4474 | { | |
4475 | return NULL; | |
4476 | } | |
4477 | ||
4478 | /* Translate internal representation of relocation info to BFD target | |
4479 | format. */ | |
4480 | ||
4481 | arelent * | |
4482 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) | |
4483 | { | |
4484 | arelent *reloc; | |
ac145307 | 4485 | asymbol *symbol; |
40b36596 JM |
4486 | bfd_reloc_code_real_type r_type; |
4487 | ||
4488 | reloc = xmalloc (sizeof (arelent)); | |
4489 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
ac145307 BS |
4490 | symbol = symbol_get_bfdsym (fixp->fx_addsy); |
4491 | *reloc->sym_ptr_ptr = symbol; | |
40b36596 | 4492 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
41820509 | 4493 | reloc->addend = (tic6x_generate_rela ? fixp->fx_offset : 0); |
40b36596 JM |
4494 | r_type = fixp->fx_r_type; |
4495 | reloc->howto = bfd_reloc_type_lookup (stdoutput, r_type); | |
4496 | ||
4497 | if (reloc->howto == NULL) | |
4498 | { | |
4499 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
4500 | _("Cannot represent relocation type %s"), | |
4501 | bfd_get_reloc_code_name (r_type)); | |
4502 | return NULL; | |
4503 | } | |
4504 | ||
41820509 JM |
4505 | /* Correct for adjustments bfd_install_relocation will make. */ |
4506 | if (reloc->howto->pcrel_offset && reloc->howto->partial_inplace) | |
ac145307 BS |
4507 | { |
4508 | reloc->addend += reloc->address; | |
4509 | if (!bfd_is_com_section (symbol)) | |
4510 | reloc->addend -= symbol->value; | |
4511 | } | |
4a732032 BS |
4512 | if (r_type == BFD_RELOC_C6000_PCR_H16 |
4513 | || r_type == BFD_RELOC_C6000_PCR_L16) | |
4514 | { | |
4515 | symbolS *t = fixp->tc_fix_data.fix_subsy; | |
4516 | segT sub_symbol_segment; | |
4517 | ||
4518 | resolve_symbol_value (t); | |
4519 | sub_symbol_segment = S_GET_SEGMENT (t); | |
4520 | if (sub_symbol_segment == undefined_section) | |
4521 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
4522 | _("undefined symbol %s in PCR relocation"), | |
4523 | S_GET_NAME (t)); | |
4524 | else | |
4525 | { | |
4526 | reloc->addend = reloc->address & ~0x1F; | |
4527 | reloc->addend -= S_GET_VALUE (t); | |
4528 | } | |
4529 | } | |
40b36596 JM |
4530 | return reloc; |
4531 | } | |
1bce6bd8 PB |
4532 | |
4533 | /* Convert REGNAME to a DWARF-2 register number. */ | |
4534 | ||
4535 | int | |
4536 | tic6x_regname_to_dw2regnum (char *regname) | |
4537 | { | |
4538 | bfd_boolean reg_ok; | |
4539 | tic6x_register reg; | |
4540 | char *rq = regname; | |
4541 | ||
4542 | reg_ok = tic6x_parse_register (&rq, ®); | |
4543 | ||
4544 | if (!reg_ok) | |
4545 | return -1; | |
4546 | ||
4547 | switch (reg.side) | |
4548 | { | |
4549 | case 1: /* A regs. */ | |
4550 | if (reg.num < 16) | |
4551 | return reg.num; | |
4552 | else if (reg.num < 32) | |
4553 | return (reg.num - 16) + 37; | |
4554 | else | |
4555 | return -1; | |
4556 | ||
4557 | case 2: /* B regs. */ | |
4558 | if (reg.num < 16) | |
4559 | return reg.num + 16; | |
4560 | else if (reg.num < 32) | |
4561 | return (reg.num - 16) + 53; | |
4562 | else | |
4563 | return -1; | |
4564 | ||
4565 | default: | |
4566 | return -1; | |
4567 | } | |
4568 | } | |
4569 | ||
4570 | /* Initialize the DWARF-2 unwind information for this procedure. */ | |
4571 | ||
4572 | void | |
4573 | tic6x_frame_initial_instructions (void) | |
4574 | { | |
4575 | /* CFA is initial stack pointer (B15). */ | |
4576 | cfi_add_CFA_def_cfa (31, 0); | |
4577 | } | |
4578 | ||
4579 | /* Start an exception table entry. If idx is nonzero this is an index table | |
4580 | entry. */ | |
4581 | ||
4582 | static void | |
4583 | tic6x_start_unwind_section (const segT text_seg, int idx) | |
4584 | { | |
4585 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4586 | const char * text_name; | |
4587 | const char * prefix; | |
4588 | const char * prefix_once; | |
4589 | const char * group_name; | |
4590 | size_t prefix_len; | |
4591 | size_t text_len; | |
4592 | char * sec_name; | |
4593 | size_t sec_name_len; | |
4594 | int type; | |
4595 | int flags; | |
4596 | int linkonce; | |
4597 | ||
4598 | if (idx) | |
4599 | { | |
4600 | prefix = ELF_STRING_C6000_unwind; | |
4601 | prefix_once = ELF_STRING_C6000_unwind_once; | |
4602 | type = SHT_C6000_UNWIND; | |
4603 | } | |
4604 | else | |
4605 | { | |
4606 | prefix = ELF_STRING_C6000_unwind_info; | |
4607 | prefix_once = ELF_STRING_C6000_unwind_info_once; | |
4608 | type = SHT_PROGBITS; | |
4609 | } | |
4610 | ||
4611 | text_name = segment_name (text_seg); | |
4612 | if (streq (text_name, ".text")) | |
4613 | text_name = ""; | |
4614 | ||
4615 | if (strncmp (text_name, ".gnu.linkonce.t.", | |
4616 | strlen (".gnu.linkonce.t.")) == 0) | |
4617 | { | |
4618 | prefix = prefix_once; | |
4619 | text_name += strlen (".gnu.linkonce.t."); | |
4620 | } | |
4621 | ||
4622 | prefix_len = strlen (prefix); | |
4623 | text_len = strlen (text_name); | |
4624 | sec_name_len = prefix_len + text_len; | |
4625 | sec_name = (char *) xmalloc (sec_name_len + 1); | |
4626 | memcpy (sec_name, prefix, prefix_len); | |
4627 | memcpy (sec_name + prefix_len, text_name, text_len); | |
4628 | sec_name[prefix_len + text_len] = '\0'; | |
4629 | ||
4630 | flags = SHF_ALLOC; | |
4631 | linkonce = 0; | |
4632 | group_name = 0; | |
4633 | ||
4634 | /* Handle COMDAT group. */ | |
4635 | if (prefix != prefix_once && (text_seg->flags & SEC_LINK_ONCE) != 0) | |
4636 | { | |
4637 | group_name = elf_group_name (text_seg); | |
4638 | if (group_name == NULL) | |
4639 | { | |
4640 | as_bad (_("group section `%s' has no group signature"), | |
4641 | segment_name (text_seg)); | |
4642 | ignore_rest_of_line (); | |
4643 | return; | |
4644 | } | |
4645 | flags |= SHF_GROUP; | |
4646 | linkonce = 1; | |
4647 | } | |
4648 | ||
4649 | obj_elf_change_section (sec_name, type, flags, 0, group_name, linkonce, 0); | |
4650 | ||
4651 | /* Set the section link for index tables. */ | |
4652 | if (idx) | |
4653 | elf_linked_to_section (now_seg) = text_seg; | |
4654 | ||
4655 | seg_info (now_seg)->tc_segment_info_data.text_unwind = unwind; | |
4656 | } | |
4657 | ||
4658 | ||
4659 | static const int | |
4660 | tic6x_unwind_frame_regs[TIC6X_NUM_UNWIND_REGS] = | |
4661 | /* A15 B15 B14 B13 B12 B11 B10 B3 A14 A13 A12 A11 A10. */ | |
4662 | { 15, 31, 30, 29, 28, 27, 26, 19, 14, 13, 12, 11, 10 }; | |
4663 | ||
4664 | /* Register save offsets for __c6xabi_push_rts. */ | |
4665 | static const int | |
4666 | tic6x_pop_rts_offset_little[TIC6X_NUM_UNWIND_REGS] = | |
4667 | /* A15 B15 B14 B13 B12 B11 B10 B3 A14 A13 A12 A11 A10. */ | |
4668 | { -1, 1, 0, -3, -4, -7, -8,-11, -2, -5, -6, -9,-10}; | |
4669 | ||
4670 | static const int | |
4671 | tic6x_pop_rts_offset_big[TIC6X_NUM_UNWIND_REGS] = | |
4672 | /* A15 B15 B14 B13 B12 B11 B10 B3 A14 A13 A12 A11 A10. */ | |
4673 | { -2, 1, 0, -4, -3, -8, -7,-12, -1, -6, -5,-10, -9}; | |
4674 | ||
4675 | /* Map from dwarf register number to unwind frame register number. */ | |
4676 | static int | |
4677 | tic6x_unwind_reg_from_dwarf (int dwarf) | |
4678 | { | |
4679 | int reg; | |
4680 | ||
4681 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
4682 | { | |
4683 | if (tic6x_unwind_frame_regs[reg] == dwarf) | |
4684 | return reg; | |
4685 | } | |
4686 | ||
4687 | return -1; | |
4688 | } | |
4689 | ||
4690 | /* Unwinding bytecode definitions. */ | |
4691 | #define UNWIND_OP_ADD_SP 0x00 | |
4692 | #define UNWIND_OP_ADD_SP2 0xd2 | |
4693 | #define UNWIND_OP2_POP 0x8000 | |
4694 | #define UNWIND_OP2_POP_COMPACT 0xa000 | |
4695 | #define UNWIND_OP_POP_REG 0xc0 | |
4696 | #define UNWIND_OP_MV_FP 0xd0 | |
4697 | #define UNWIND_OP_POP_RTS 0xd1 | |
4698 | #define UNWIND_OP_RET 0xe0 | |
4699 | ||
4700 | /* Maximum stack adjustment for __c6xabi_unwind_cpp_pr3/4 */ | |
4701 | #define MAX_COMPACT_SP_OFFSET (0x7f << 3) | |
4702 | ||
4703 | static void | |
4704 | tic6x_flush_unwind_word (valueT data) | |
4705 | { | |
4706 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4707 | char *ptr; | |
4708 | ||
4709 | /* Create EXTAB entry if it does not exist. */ | |
4710 | if (unwind->table_entry == NULL) | |
4711 | { | |
4712 | tic6x_start_unwind_section (unwind->saved_seg, 0); | |
4713 | frag_align (2, 0, 0); | |
4714 | record_alignment (now_seg, 2); | |
4715 | unwind->table_entry = expr_build_dot (); | |
4716 | ptr = frag_more (4); | |
4717 | unwind->frag_start = ptr; | |
4718 | } | |
4719 | else | |
4720 | { | |
4721 | /* Append additional word of data. */ | |
4722 | ptr = frag_more (4); | |
4723 | } | |
4724 | ||
4725 | md_number_to_chars (ptr, data, 4); | |
4726 | } | |
4727 | ||
4728 | /* Add a single byte of unwinding data. */ | |
4729 | ||
4730 | static void | |
4731 | tic6x_unwind_byte (int byte) | |
4732 | { | |
4733 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4734 | ||
4735 | unwind->data_bytes++; | |
4736 | /* Only flush the first word after we know multiple words are required. */ | |
4737 | if (unwind->data_bytes == 5) | |
4738 | { | |
4739 | if (unwind->personality_index == -1) | |
4740 | { | |
4741 | /* At this point we know we are too big for pr0. */ | |
4742 | unwind->personality_index = 1; | |
4743 | tic6x_flush_unwind_word (0x81000000 | ((unwind->data >> 8) & 0xffff)); | |
4744 | unwind->data = ((unwind->data & 0xff) << 8) | byte; | |
4745 | unwind->data_bytes++; | |
4746 | } | |
4747 | else | |
4748 | { | |
4749 | tic6x_flush_unwind_word (unwind->data); | |
4750 | unwind->data = byte; | |
4751 | } | |
4752 | } | |
4753 | else | |
4754 | { | |
4755 | unwind->data = (unwind->data << 8) | byte; | |
4756 | if ((unwind->data_bytes & 3) == 0 && unwind->data_bytes > 4) | |
4757 | { | |
4758 | tic6x_flush_unwind_word (unwind->data); | |
4759 | unwind->data = 0; | |
4760 | } | |
4761 | } | |
4762 | } | |
4763 | ||
4764 | /* Add a two-byte unwinding opcode. */ | |
4765 | static void | |
4766 | tic6x_unwind_2byte (int bytes) | |
4767 | { | |
4768 | tic6x_unwind_byte (bytes >> 8); | |
4769 | tic6x_unwind_byte (bytes & 0xff); | |
4770 | } | |
4771 | ||
4772 | static void | |
4773 | tic6x_unwind_uleb (offsetT offset) | |
4774 | { | |
4775 | while (offset > 0x7f) | |
4776 | { | |
4777 | tic6x_unwind_byte ((offset & 0x7f) | 0x80); | |
4778 | offset >>= 7; | |
4779 | } | |
4780 | tic6x_unwind_byte (offset); | |
4781 | } | |
4782 | ||
4783 | void | |
4784 | tic6x_cfi_startproc (void) | |
4785 | { | |
4786 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4787 | ||
4788 | unwind->personality_index = -1; | |
4789 | unwind->personality_routine = NULL; | |
4790 | if (unwind->table_entry) | |
4791 | as_bad (_("missing .endp before .cfi_startproc")); | |
4792 | ||
4793 | unwind->table_entry = NULL; | |
4794 | unwind->data_bytes = -1; | |
4795 | } | |
4796 | ||
4797 | static void | |
4798 | tic6x_output_exidx_entry (void) | |
4799 | { | |
4800 | char *ptr; | |
4801 | long where; | |
4802 | unsigned int marked_pr_dependency; | |
4803 | segT old_seg; | |
4804 | subsegT old_subseg; | |
4805 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4806 | ||
4807 | old_seg = now_seg; | |
4808 | old_subseg = now_subseg; | |
4809 | ||
4810 | /* Add index table entry. This is two words. */ | |
4811 | tic6x_start_unwind_section (unwind->saved_seg, 1); | |
4812 | frag_align (2, 0, 0); | |
4813 | record_alignment (now_seg, 2); | |
4814 | ||
4815 | ptr = frag_more (8); | |
4816 | where = frag_now_fix () - 8; | |
4817 | ||
4818 | /* Self relative offset of the function start. */ | |
4819 | fix_new (frag_now, where, 4, unwind->function_start, 0, 1, | |
4820 | BFD_RELOC_C6000_PREL31); | |
4821 | ||
4822 | /* Indicate dependency on ABI-defined personality routines to the | |
4823 | linker, if it hasn't been done already. */ | |
4824 | marked_pr_dependency | |
4825 | = seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency; | |
4826 | if (unwind->personality_index >= 0 && unwind->personality_index < 5 | |
4827 | && !(marked_pr_dependency & (1 << unwind->personality_index))) | |
4828 | { | |
4829 | static const char *const name[] = | |
4830 | { | |
4831 | "__c6xabi_unwind_cpp_pr0", | |
4832 | "__c6xabi_unwind_cpp_pr1", | |
4833 | "__c6xabi_unwind_cpp_pr2", | |
4834 | "__c6xabi_unwind_cpp_pr3", | |
4835 | "__c6xabi_unwind_cpp_pr4" | |
4836 | }; | |
4837 | symbolS *pr = symbol_find_or_make (name[unwind->personality_index]); | |
4838 | fix_new (frag_now, where, 0, pr, 0, 1, BFD_RELOC_NONE); | |
4839 | seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency | |
4840 | |= 1 << unwind->personality_index; | |
4841 | } | |
4842 | ||
4843 | if (unwind->table_entry) | |
4844 | { | |
4845 | /* Self relative offset of the table entry. */ | |
4846 | fix_new (frag_now, where + 4, 4, unwind->table_entry, 0, 1, | |
4847 | BFD_RELOC_C6000_PREL31); | |
4848 | } | |
4849 | else | |
4850 | { | |
4851 | /* Inline exception table entry. */ | |
4852 | md_number_to_chars (ptr + 4, unwind->data, 4); | |
4853 | } | |
4854 | ||
4855 | /* Restore the original section. */ | |
4856 | subseg_set (old_seg, old_subseg); | |
4857 | } | |
4858 | ||
4859 | static void | |
4860 | tic6x_output_unwinding (bfd_boolean need_extab) | |
4861 | { | |
4862 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4863 | unsigned safe_mask = unwind->safe_mask; | |
4864 | unsigned compact_mask = unwind->compact_mask; | |
4865 | unsigned reg_saved_mask = unwind->reg_saved_mask; | |
4866 | offsetT cfa_offset = unwind->cfa_offset; | |
4867 | long where; | |
4868 | int reg; | |
4869 | ||
4870 | if (unwind->personality_index == -2) | |
4871 | { | |
4872 | /* Function can not be unwound. */ | |
4873 | unwind->data = 1; | |
4874 | tic6x_output_exidx_entry (); | |
4875 | return; | |
4876 | } | |
4877 | ||
4878 | if (unwind->personality_index == -1 && unwind->personality_routine == NULL) | |
4879 | { | |
4880 | /* Auto-select a personality routine if none specified. */ | |
4881 | if (reg_saved_mask || cfa_offset >= MAX_COMPACT_SP_OFFSET) | |
4882 | unwind->personality_index = -1; | |
4883 | else if (safe_mask) | |
4884 | unwind->personality_index = 3; | |
4885 | else | |
4886 | unwind->personality_index = 4; | |
4887 | } | |
4888 | ||
4889 | /* Calculate unwinding opcodes, and emit to EXTAB if necessary. */ | |
4890 | unwind->table_entry = NULL; | |
4891 | if (unwind->personality_index == 3 || unwind->personality_index == 4) | |
4892 | { | |
4893 | if (cfa_offset >= MAX_COMPACT_SP_OFFSET) | |
4894 | { | |
4895 | as_bad (_("stack pointer offset too large for personality routine")); | |
4896 | return; | |
4897 | } | |
4898 | if (reg_saved_mask | |
4899 | || (unwind->personality_index == 3 && compact_mask != 0) | |
4900 | || (unwind->personality_index == 4 && safe_mask != 0)) | |
4901 | { | |
4902 | as_bad (_("stack frame layout does not match personality routine")); | |
4903 | return; | |
4904 | } | |
4905 | ||
4906 | unwind->data = (1u << 31) | (unwind->personality_index << 24); | |
4907 | if (unwind->cfa_reg == 15) | |
4908 | unwind->data |= 0x7f << 17; | |
4909 | else | |
4910 | unwind->data |= cfa_offset << (17 - 3); | |
4911 | ||
4912 | if (unwind->personality_index == 3) | |
4913 | unwind->data |= safe_mask << 4; | |
4914 | else | |
4915 | unwind->data |= compact_mask << 4; | |
4916 | unwind->data |= unwind->return_reg; | |
4917 | unwind->data_bytes = 4; | |
4918 | } | |
4919 | else | |
4920 | { | |
4921 | if (unwind->personality_routine) | |
4922 | { | |
4923 | unwind->data = 0; | |
4924 | unwind->data_bytes = 5; | |
4925 | tic6x_flush_unwind_word (0); | |
4926 | /* First word is personality routine. */ | |
4927 | where = frag_now_fix () - 4; | |
4928 | fix_new (frag_now, where, 4, unwind->personality_routine, 0, 1, | |
4929 | BFD_RELOC_C6000_PREL31); | |
4930 | } | |
4931 | else if (unwind->personality_index > 0) | |
4932 | { | |
4933 | unwind->data = 0x8000 | (unwind->personality_index << 8); | |
4934 | unwind->data_bytes = 2; | |
4935 | } | |
4936 | else /* pr0 or undecided */ | |
4937 | { | |
4938 | unwind->data = 0x80; | |
4939 | unwind->data_bytes = 1; | |
4940 | } | |
4941 | ||
4942 | if (unwind->return_reg != UNWIND_B3) | |
4943 | { | |
4944 | tic6x_unwind_byte (UNWIND_OP_RET | unwind->return_reg); | |
4945 | } | |
4946 | ||
4947 | if (unwind->cfa_reg == 15) | |
4948 | { | |
4949 | tic6x_unwind_byte (UNWIND_OP_MV_FP); | |
4950 | } | |
4951 | else if (cfa_offset != 0) | |
4952 | { | |
4953 | cfa_offset >>= 3; | |
4954 | if (cfa_offset > 0x80) | |
4955 | { | |
4956 | tic6x_unwind_byte (UNWIND_OP_ADD_SP2); | |
4957 | tic6x_unwind_uleb (cfa_offset - 0x81); | |
4958 | } | |
4959 | else if (cfa_offset > 0x40) | |
4960 | { | |
4961 | tic6x_unwind_byte (UNWIND_OP_ADD_SP | 0x3f); | |
4962 | tic6x_unwind_byte (UNWIND_OP_ADD_SP | (cfa_offset - 0x40)); | |
4963 | } | |
4964 | else | |
4965 | { | |
4966 | tic6x_unwind_byte (UNWIND_OP_ADD_SP | (cfa_offset - 1)); | |
4967 | } | |
4968 | } | |
4969 | ||
4970 | if (safe_mask) | |
4971 | tic6x_unwind_2byte (UNWIND_OP2_POP | unwind->safe_mask); | |
4972 | else if (unwind->pop_rts) | |
4973 | tic6x_unwind_byte (UNWIND_OP_POP_RTS); | |
4974 | else if (compact_mask) | |
4975 | tic6x_unwind_2byte (UNWIND_OP2_POP_COMPACT | unwind->compact_mask); | |
4976 | else if (reg_saved_mask) | |
4977 | { | |
4978 | offsetT cur_offset; | |
4979 | int val; | |
4980 | int last_val; | |
4981 | ||
4982 | tic6x_unwind_byte (UNWIND_OP_POP_REG | unwind->saved_reg_count); | |
4983 | last_val = 0; | |
4984 | for (cur_offset = 0; unwind->saved_reg_count > 0; cur_offset -= 4) | |
4985 | { | |
4986 | val = 0xf; | |
4987 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
4988 | { | |
4989 | if (!unwind->reg_saved[reg]) | |
4990 | continue; | |
4991 | ||
4992 | if (unwind->reg_offset[reg] == cur_offset) | |
4993 | { | |
4994 | unwind->saved_reg_count--; | |
4995 | val = reg; | |
4996 | break; | |
4997 | } | |
4998 | } | |
4999 | if ((cur_offset & 4) == 4) | |
5000 | tic6x_unwind_byte ((last_val << 4) | val); | |
5001 | else | |
5002 | last_val = val; | |
5003 | } | |
5004 | if ((cur_offset & 4) == 4) | |
5005 | tic6x_unwind_byte ((last_val << 4) | 0xf); | |
5006 | } | |
5007 | ||
5008 | /* Pad with RETURN opcodes. */ | |
5009 | while ((unwind->data_bytes & 3) != 0) | |
5010 | tic6x_unwind_byte (UNWIND_OP_RET | UNWIND_B3); | |
5011 | ||
5012 | if (unwind->personality_index == -1 && unwind->personality_routine == NULL) | |
5013 | unwind->personality_index = 0; | |
5014 | } | |
5015 | ||
5016 | /* Force creation of an EXTAB entry if an LSDA is required. */ | |
5017 | if (need_extab && !unwind->table_entry) | |
5018 | { | |
5019 | if (unwind->data_bytes != 4) | |
5020 | abort (); | |
5021 | ||
5022 | tic6x_flush_unwind_word (unwind->data); | |
5023 | } | |
5024 | else if (unwind->table_entry && !need_extab) | |
5025 | { | |
5026 | /* Add an empty descriptor if there is no user-specified data. */ | |
5027 | char *ptr = frag_more (4); | |
5028 | md_number_to_chars (ptr, 0, 4); | |
5029 | } | |
5030 | ||
5031 | /* Fill in length of unwinding bytecode. */ | |
5032 | if (unwind->table_entry) | |
5033 | { | |
5034 | valueT tmp; | |
5035 | if (unwind->data_bytes > 0x400) | |
5036 | as_bad (_("too many unwinding instructions")); | |
5037 | ||
5038 | if (unwind->personality_index == -1) | |
5039 | { | |
5040 | tmp = md_chars_to_number (unwind->frag_start + 4, 4); | |
5041 | tmp |= ((unwind->data_bytes - 8) >> 2) << 24; | |
5042 | md_number_to_chars (unwind->frag_start + 4, tmp, 4); | |
5043 | } | |
5044 | else if (unwind->personality_index == 1 || unwind->personality_index == 2) | |
5045 | { | |
5046 | tmp = md_chars_to_number (unwind->frag_start, 4); | |
5047 | tmp |= ((unwind->data_bytes - 4) >> 2) << 16; | |
5048 | md_number_to_chars (unwind->frag_start, tmp, 4); | |
5049 | } | |
5050 | } | |
5051 | tic6x_output_exidx_entry (); | |
5052 | } | |
5053 | ||
5054 | /* FIXME: This will get horribly confused if cfi directives are emitted for | |
5055 | function epilogue. */ | |
5056 | void | |
5057 | tic6x_cfi_endproc (struct fde_entry *fde) | |
5058 | { | |
5059 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
5060 | struct cfi_insn_data *insn; | |
5061 | int reg; | |
5062 | unsigned safe_mask = 0; | |
5063 | unsigned compact_mask = 0; | |
5064 | unsigned reg_saved_mask = 0; | |
5065 | offsetT cfa_offset = 0; | |
5066 | offsetT save_offset = 0; | |
5067 | ||
5068 | unwind->cfa_reg = 31; | |
5069 | unwind->return_reg = UNWIND_B3; | |
5070 | unwind->saved_reg_count = 0; | |
5071 | unwind->pop_rts = FALSE; | |
5072 | ||
5073 | unwind->saved_seg = now_seg; | |
5074 | unwind->saved_subseg = now_subseg; | |
5075 | ||
5076 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5077 | unwind->reg_saved[reg] = FALSE; | |
5078 | ||
5079 | /* Scan FDE instructions to build up stack frame layout. */ | |
5080 | for (insn = fde->data; insn; insn = insn->next) | |
5081 | { | |
5082 | switch (insn->insn) | |
5083 | { | |
5084 | case DW_CFA_advance_loc: | |
5085 | break; | |
5086 | ||
5087 | case DW_CFA_def_cfa: | |
5088 | unwind->cfa_reg = insn->u.ri.reg; | |
5089 | cfa_offset = insn->u.ri.offset; | |
5090 | break; | |
5091 | ||
5092 | case DW_CFA_def_cfa_register: | |
5093 | unwind->cfa_reg = insn->u.r; | |
5094 | break; | |
5095 | ||
5096 | case DW_CFA_def_cfa_offset: | |
5097 | cfa_offset = insn->u.i; | |
5098 | break; | |
5099 | ||
5100 | case DW_CFA_undefined: | |
5101 | case DW_CFA_same_value: | |
5102 | reg = tic6x_unwind_reg_from_dwarf (insn->u.r); | |
5103 | if (reg >= 0) | |
5104 | unwind->reg_saved[reg] = FALSE; | |
5105 | break; | |
5106 | ||
5107 | case DW_CFA_offset: | |
5108 | reg = tic6x_unwind_reg_from_dwarf (insn->u.ri.reg); | |
5109 | if (reg < 0) | |
5110 | { | |
5111 | as_bad (_("unable to generate unwinding opcode for reg %d"), | |
5112 | insn->u.ri.reg); | |
5113 | return; | |
5114 | } | |
5115 | unwind->reg_saved[reg] = TRUE; | |
5116 | unwind->reg_offset[reg] = insn->u.ri.offset; | |
5117 | if (insn->u.ri.reg == UNWIND_B3) | |
5118 | unwind->return_reg = UNWIND_B3; | |
5119 | break; | |
5120 | ||
5121 | case DW_CFA_register: | |
5122 | if (insn->u.rr.reg1 != 19) | |
5123 | { | |
5124 | as_bad (_("unable to generate unwinding opcode for reg %d"), | |
5125 | insn->u.rr.reg1); | |
5126 | return; | |
5127 | } | |
5128 | ||
5129 | reg = tic6x_unwind_reg_from_dwarf (insn->u.rr.reg2); | |
5130 | if (reg < 0) | |
5131 | { | |
5132 | as_bad (_("unable to generate unwinding opcode for reg %d"), | |
5133 | insn->u.rr.reg2); | |
5134 | return; | |
5135 | } | |
5136 | ||
5137 | unwind->return_reg = reg; | |
5138 | unwind->reg_saved[UNWIND_B3] = FALSE; | |
5139 | if (unwind->reg_saved[reg]) | |
5140 | { | |
5141 | as_bad (_("unable to restore return address from " | |
5142 | "previously restored reg")); | |
5143 | return; | |
5144 | } | |
5145 | break; | |
5146 | ||
5147 | case DW_CFA_restore: | |
5148 | case DW_CFA_remember_state: | |
5149 | case DW_CFA_restore_state: | |
5150 | case DW_CFA_GNU_window_save: | |
5151 | case CFI_escape: | |
5152 | case CFI_val_encoded_addr: | |
5153 | as_bad (_("unhandled CFA insn for unwinding (%d)"), insn->insn); | |
5154 | break; | |
5155 | ||
5156 | default: | |
5157 | abort (); | |
5158 | } | |
5159 | } | |
5160 | ||
5161 | if (unwind->cfa_reg != 15 && unwind->cfa_reg != 31) | |
5162 | { | |
5163 | as_bad (_("unable to generate unwinding opcode for frame pointer reg %d"), | |
5164 | unwind->cfa_reg); | |
5165 | return; | |
5166 | } | |
5167 | ||
5168 | if (unwind->cfa_reg == 15) | |
5169 | { | |
5170 | if (cfa_offset != 0) | |
5171 | { | |
5172 | as_bad (_("unable to generate unwinding opcode for " | |
5173 | "frame pointer offset")); | |
5174 | return; | |
5175 | } | |
5176 | } | |
5177 | else | |
5178 | { | |
5179 | if ((cfa_offset & 7) != 0) | |
5180 | { | |
5181 | as_bad (_("unwound stack pointer not doubleword aligned")); | |
5182 | return; | |
5183 | } | |
5184 | } | |
5185 | ||
5186 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5187 | { | |
5188 | if (unwind->reg_saved[reg]) | |
5189 | reg_saved_mask |= 1 << (TIC6X_NUM_UNWIND_REGS - (reg + 1)); | |
5190 | } | |
5191 | ||
5192 | /* Check for standard "safe debug" frame layout */ | |
5193 | if (reg_saved_mask) | |
5194 | { | |
5195 | save_offset = 0; | |
5196 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5197 | { | |
5198 | if (!unwind->reg_saved[reg]) | |
5199 | continue; | |
5200 | ||
5201 | if (target_big_endian | |
5202 | && reg < TIC6X_NUM_UNWIND_REGS - 1 | |
5203 | && unwind->reg_saved[reg + 1] | |
5204 | && tic6x_unwind_frame_regs[reg] | |
5205 | == tic6x_unwind_frame_regs[reg + 1] + 1 | |
5206 | && (tic6x_unwind_frame_regs[reg] & 1) == 1 | |
5207 | && (save_offset & 4) == 4) | |
5208 | { | |
5209 | /* Swapped pair */ | |
5210 | if (save_offset != unwind->reg_offset[reg + 1] | |
5211 | || save_offset - 4 != unwind->reg_offset[reg]) | |
5212 | break; | |
5213 | save_offset -= 8; | |
5214 | reg++; | |
5215 | } | |
5216 | else | |
5217 | { | |
5218 | if (save_offset != unwind->reg_offset[reg]) | |
5219 | break; | |
5220 | save_offset -= 4; | |
5221 | } | |
5222 | } | |
5223 | if (reg == TIC6X_NUM_UNWIND_REGS) | |
5224 | { | |
5225 | safe_mask = reg_saved_mask; | |
5226 | reg_saved_mask = 0; | |
5227 | } | |
5228 | } | |
5229 | ||
5230 | /* Check for compact frame layout. */ | |
5231 | if (reg_saved_mask) | |
5232 | { | |
5233 | save_offset = 0; | |
5234 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5235 | { | |
5236 | int reg2; | |
5237 | ||
5238 | if (!unwind->reg_saved[reg]) | |
5239 | continue; | |
5240 | ||
5241 | if (reg < TIC6X_NUM_UNWIND_REGS - 1) | |
5242 | { | |
5243 | reg2 = reg + 1; | |
5244 | ||
5245 | if (!unwind->reg_saved[reg2] | |
5246 | || tic6x_unwind_frame_regs[reg] | |
5247 | != tic6x_unwind_frame_regs[reg2] + 1 | |
5248 | || (tic6x_unwind_frame_regs[reg2] & 1) != 0 | |
5249 | || save_offset == 0) | |
5250 | reg2 = -1; | |
5251 | } | |
5252 | else | |
5253 | reg2 = -1; | |
5254 | ||
5255 | if (reg2 >= 0) | |
5256 | { | |
5257 | int high_offset; | |
5258 | if (target_big_endian) | |
5259 | high_offset = 4; /* lower address = positive stack offset. */ | |
5260 | else | |
5261 | high_offset = 0; | |
5262 | ||
5263 | if (save_offset + 4 - high_offset != unwind->reg_offset[reg] | |
5264 | || save_offset + high_offset != unwind->reg_offset[reg2]) | |
5265 | { | |
5266 | break; | |
5267 | } | |
5268 | reg++; | |
5269 | } | |
5270 | else | |
5271 | { | |
5272 | if (save_offset != unwind->reg_offset[reg]) | |
5273 | break; | |
5274 | } | |
5275 | save_offset -= 8; | |
5276 | } | |
5277 | ||
5278 | if (reg == TIC6X_NUM_UNWIND_REGS) | |
5279 | { | |
5280 | compact_mask = reg_saved_mask; | |
5281 | reg_saved_mask = 0; | |
5282 | } | |
5283 | } | |
5284 | ||
5285 | /* Check for __c6xabi_pop_rts format */ | |
5286 | if (reg_saved_mask == 0x17ff) | |
5287 | { | |
5288 | const int *pop_rts_offset = target_big_endian | |
5289 | ? tic6x_pop_rts_offset_big | |
5290 | : tic6x_pop_rts_offset_little; | |
5291 | ||
5292 | save_offset = 0; | |
5293 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5294 | { | |
5295 | if (reg == UNWIND_B15) | |
5296 | continue; | |
5297 | ||
5298 | if (unwind->reg_offset[reg] != pop_rts_offset[reg] * 4) | |
5299 | break; | |
5300 | } | |
5301 | ||
5302 | if (reg == TIC6X_NUM_UNWIND_REGS) | |
5303 | { | |
5304 | unwind->pop_rts = TRUE; | |
5305 | reg_saved_mask = 0; | |
5306 | } | |
5307 | } | |
5308 | /* If all else fails then describe the frame manually. */ | |
5309 | if (reg_saved_mask) | |
5310 | { | |
5311 | save_offset = 0; | |
5312 | ||
5313 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5314 | { | |
5315 | if (!unwind->reg_saved[reg]) | |
5316 | continue; | |
5317 | ||
5318 | unwind->saved_reg_count++; | |
5319 | /* Encoding uses 4 bits per word, so size of unwinding opcode data | |
5320 | limits the save area size. The exact cap will be figured out | |
5321 | later due to overflow, the 0x800 here is just a quick sanity | |
5322 | check to weed out obviously excessive offsets. */ | |
5323 | if (unwind->reg_offset[reg] > 0 || unwind->reg_offset[reg] < -0x800 | |
5324 | || (unwind->reg_offset[reg] & 3) != 0) | |
5325 | { | |
5326 | as_bad (_("stack frame layout too complex for unwinder")); | |
5327 | return; | |
5328 | } | |
5329 | ||
5330 | if (unwind->reg_offset[reg] < save_offset) | |
5331 | save_offset = unwind->reg_offset[reg] - 4; | |
5332 | } | |
5333 | } | |
5334 | ||
5335 | /* Align to 8-byte boundary (stack grows towards negative offsets). */ | |
5336 | save_offset &= ~7; | |
5337 | ||
5338 | if (unwind->cfa_reg == 31 && !reg_saved_mask) | |
5339 | { | |
5340 | cfa_offset += save_offset; | |
5341 | if (cfa_offset < 0) | |
5342 | { | |
5343 | as_bad (_("unwound frame has negative size")); | |
5344 | return; | |
5345 | } | |
5346 | } | |
5347 | ||
5348 | unwind->safe_mask = safe_mask; | |
5349 | unwind->compact_mask = compact_mask; | |
5350 | unwind->reg_saved_mask = reg_saved_mask; | |
5351 | unwind->cfa_offset = cfa_offset; | |
5352 | unwind->function_start = fde->start_address; | |
5353 | } |