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40b36596 | 1 | /* TI C6X assembler. |
6f2750fe | 2 | Copyright (C) 2010-2016 Free Software Foundation, Inc. |
c0621d88 NS |
3 | Contributed by Joseph Myers <joseph@codesourcery.com> |
4 | Bernd Schmidt <bernds@codesourcery.com> | |
40b36596 JM |
5 | |
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
21 | 02110-1301, USA. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include "dwarf2dbg.h" | |
1bce6bd8 | 25 | #include "dw2gencfi.h" |
40b36596 JM |
26 | #include "safe-ctype.h" |
27 | #include "subsegs.h" | |
28 | #include "opcode/tic6x.h" | |
59e6276b | 29 | #include "elf/tic6x.h" |
41820509 | 30 | #include "elf32-tic6x.h" |
40b36596 JM |
31 | |
32 | /* Truncate and sign-extend at 32 bits, so that building on a 64-bit | |
33 | host gives identical results to a 32-bit host. */ | |
34 | #define TRUNC(X) ((valueT) (X) & 0xffffffffU) | |
35 | #define SEXT(X) ((TRUNC (X) ^ 0x80000000U) - 0x80000000U) | |
36 | ||
1bce6bd8 PB |
37 | #define streq(a, b) (strcmp (a, b) == 0) |
38 | ||
ac145307 BS |
39 | /* Stuff for .scomm symbols. */ |
40 | static segT sbss_section; | |
41 | static asection scom_section; | |
42 | static asymbol scom_symbol; | |
43 | ||
40b36596 JM |
44 | const char comment_chars[] = ";"; |
45 | const char line_comment_chars[] = "#*;"; | |
46 | const char line_separator_chars[] = "@"; | |
47 | ||
48 | const char EXP_CHARS[] = "eE"; | |
49 | const char FLT_CHARS[] = "dDfF"; | |
50 | ||
51 | const char *md_shortopts = ""; | |
52 | ||
53 | enum | |
54 | { | |
55 | OPTION_MARCH = OPTION_MD_BASE, | |
40b36596 | 56 | OPTION_MBIG_ENDIAN, |
41820509 | 57 | OPTION_MLITTLE_ENDIAN, |
b5593623 JM |
58 | OPTION_MDSBT, |
59 | OPTION_MNO_DSBT, | |
87779176 JM |
60 | OPTION_MPID, |
61 | OPTION_MPIC, | |
62 | OPTION_MNO_PIC, | |
41820509 | 63 | OPTION_MGENERATE_REL |
40b36596 JM |
64 | }; |
65 | ||
66 | struct option md_longopts[] = | |
67 | { | |
68 | { "march", required_argument, NULL, OPTION_MARCH }, | |
40b36596 JM |
69 | { "mbig-endian", no_argument, NULL, OPTION_MBIG_ENDIAN }, |
70 | { "mlittle-endian", no_argument, NULL, OPTION_MLITTLE_ENDIAN }, | |
b5593623 JM |
71 | { "mdsbt", no_argument, NULL, OPTION_MDSBT }, |
72 | { "mno-dsbt", no_argument, NULL, OPTION_MNO_DSBT }, | |
87779176 JM |
73 | { "mpid", required_argument, NULL, OPTION_MPID }, |
74 | { "mpic", no_argument, NULL, OPTION_MPIC }, | |
75 | { "mno-pic", no_argument, NULL, OPTION_MNO_PIC }, | |
41820509 | 76 | { "mgenerate-rel", no_argument, NULL, OPTION_MGENERATE_REL }, |
40b36596 JM |
77 | { NULL, no_argument, NULL, 0 } |
78 | }; | |
79 | size_t md_longopts_size = sizeof (md_longopts); | |
80 | ||
40b36596 | 81 | /* The instructions enabled based only on the selected architecture |
98d23bef | 82 | (all instructions, if no architecture specified). */ |
40b36596 JM |
83 | static unsigned short tic6x_arch_enable = (TIC6X_INSN_C62X |
84 | | TIC6X_INSN_C64X | |
85 | | TIC6X_INSN_C64XP | |
86 | | TIC6X_INSN_C67X | |
87 | | TIC6X_INSN_C67XP | |
98d23bef | 88 | | TIC6X_INSN_C674X); |
40b36596 JM |
89 | |
90 | /* The instructions enabled based on the current set of features | |
91 | (architecture, as modified by other options). */ | |
92 | static unsigned short tic6x_features; | |
93 | ||
75fa6dc1 | 94 | /* The architecture attribute value, or C6XABI_Tag_ISA_none if |
59e6276b | 95 | not yet set. */ |
75fa6dc1 | 96 | static int tic6x_arch_attribute = C6XABI_Tag_ISA_none; |
59e6276b JM |
97 | |
98 | /* Whether any instructions at all have been seen. Once any | |
99 | instructions have been seen, architecture attributes merge into the | |
100 | previous attribute value rather than replacing it. */ | |
101 | static bfd_boolean tic6x_seen_insns = FALSE; | |
102 | ||
40b36596 JM |
103 | /* The number of registers in each register file supported by the |
104 | current architecture. */ | |
105 | static unsigned int tic6x_num_registers; | |
106 | ||
107 | /* Whether predication on A0 is possible. */ | |
108 | static bfd_boolean tic6x_predicate_a0; | |
109 | ||
110 | /* Whether execute packets can cross fetch packet boundaries. */ | |
111 | static bfd_boolean tic6x_can_cross_fp_boundary; | |
112 | ||
113 | /* Whether there are constraints on simultaneous reads and writes of | |
114 | 40-bit data. */ | |
115 | static bfd_boolean tic6x_long_data_constraints; | |
116 | ||
117 | /* Whether compact instructions are available. */ | |
118 | static bfd_boolean tic6x_compact_insns; | |
119 | ||
41820509 JM |
120 | /* Whether to generate RELA relocations. */ |
121 | static bfd_boolean tic6x_generate_rela = TRUE; | |
122 | ||
b5593623 JM |
123 | /* Whether the code uses DSBT addressing. */ |
124 | static bfd_boolean tic6x_dsbt; | |
125 | ||
87779176 JM |
126 | /* Types of position-independent data (attribute values for |
127 | Tag_ABI_PID). */ | |
128 | typedef enum | |
129 | { | |
130 | tic6x_pid_no = 0, | |
131 | tic6x_pid_near = 1, | |
132 | tic6x_pid_far = 2 | |
133 | } tic6x_pid_type; | |
134 | ||
135 | /* The type of data addressing used in this code. */ | |
136 | static tic6x_pid_type tic6x_pid; | |
137 | ||
138 | /* Whether the code uses position-independent code. */ | |
139 | static bfd_boolean tic6x_pic; | |
140 | ||
40b36596 JM |
141 | /* Table of supported architecture variants. */ |
142 | typedef struct | |
143 | { | |
144 | const char *arch; | |
59e6276b | 145 | int attr; |
40b36596 JM |
146 | unsigned short features; |
147 | } tic6x_arch_table; | |
148 | static const tic6x_arch_table tic6x_arches[] = | |
149 | { | |
75fa6dc1 JM |
150 | { "c62x", C6XABI_Tag_ISA_C62X, TIC6X_INSN_C62X }, |
151 | { "c64x", C6XABI_Tag_ISA_C64X, TIC6X_INSN_C62X | TIC6X_INSN_C64X }, | |
152 | { "c64x+", C6XABI_Tag_ISA_C64XP, (TIC6X_INSN_C62X | |
153 | | TIC6X_INSN_C64X | |
154 | | TIC6X_INSN_C64XP) }, | |
155 | { "c67x", C6XABI_Tag_ISA_C67X, TIC6X_INSN_C62X | TIC6X_INSN_C67X }, | |
156 | { "c67x+", C6XABI_Tag_ISA_C67XP, (TIC6X_INSN_C62X | |
157 | | TIC6X_INSN_C67X | |
158 | | TIC6X_INSN_C67XP) }, | |
159 | { "c674x", C6XABI_Tag_ISA_C674X, (TIC6X_INSN_C62X | |
160 | | TIC6X_INSN_C64X | |
161 | | TIC6X_INSN_C64XP | |
162 | | TIC6X_INSN_C67X | |
163 | | TIC6X_INSN_C67XP | |
164 | | TIC6X_INSN_C674X) } | |
40b36596 JM |
165 | }; |
166 | ||
1bce6bd8 PB |
167 | /* Caller saved register encodings. The standard frame layout uses this |
168 | order, starting from the highest address. There must be | |
169 | TIC6X_NUM_UNWIND_REGS values. */ | |
170 | enum | |
171 | { | |
172 | UNWIND_A15, | |
173 | UNWIND_B15, | |
174 | UNWIND_B14, | |
175 | UNWIND_B13, | |
176 | UNWIND_B12, | |
177 | UNWIND_B11, | |
178 | UNWIND_B10, | |
179 | UNWIND_B3, | |
180 | UNWIND_A14, | |
181 | UNWIND_A13, | |
182 | UNWIND_A12, | |
183 | UNWIND_A11, | |
184 | UNWIND_A10 | |
185 | }; | |
186 | ||
187 | static void tic6x_output_unwinding (bfd_boolean need_extab); | |
188 | ||
189 | /* Return the frame unwind state for the current function, allocating | |
190 | as necessary. */ | |
191 | ||
192 | static tic6x_unwind_info *tic6x_get_unwind (void) | |
193 | { | |
194 | tic6x_unwind_info *unwind; | |
195 | ||
196 | unwind = seg_info (now_seg)->tc_segment_info_data.unwind; | |
197 | if (unwind) | |
198 | return unwind; | |
199 | ||
200 | unwind = seg_info (now_seg)->tc_segment_info_data.text_unwind; | |
201 | if (unwind) | |
202 | return unwind; | |
203 | ||
204 | unwind = (tic6x_unwind_info *)xmalloc (sizeof (tic6x_unwind_info)); | |
205 | seg_info (now_seg)->tc_segment_info_data.unwind = unwind; | |
206 | memset (unwind, 0, sizeof (*unwind)); | |
207 | return unwind; | |
208 | } | |
209 | ||
40b36596 JM |
210 | /* Update the selected architecture based on ARCH, giving an error if |
211 | ARCH is an invalid value. Does not call tic6x_update_features; the | |
212 | caller must do that if necessary. */ | |
213 | ||
214 | static void | |
215 | tic6x_use_arch (const char *arch) | |
216 | { | |
217 | unsigned int i; | |
218 | ||
219 | for (i = 0; i < ARRAY_SIZE (tic6x_arches); i++) | |
220 | if (strcmp (arch, tic6x_arches[i].arch) == 0) | |
221 | { | |
222 | tic6x_arch_enable = tic6x_arches[i].features; | |
59e6276b JM |
223 | if (tic6x_seen_insns) |
224 | tic6x_arch_attribute | |
225 | = elf32_tic6x_merge_arch_attributes (tic6x_arch_attribute, | |
226 | tic6x_arches[i].attr); | |
227 | else | |
228 | tic6x_arch_attribute = tic6x_arches[i].attr; | |
40b36596 JM |
229 | return; |
230 | } | |
231 | ||
232 | as_bad (_("unknown architecture '%s'"), arch); | |
233 | } | |
234 | ||
87779176 JM |
235 | /* Table of supported -mpid arguments. */ |
236 | typedef struct | |
237 | { | |
238 | const char *arg; | |
239 | tic6x_pid_type attr; | |
240 | } tic6x_pid_type_table; | |
241 | static const tic6x_pid_type_table tic6x_pid_types[] = | |
242 | { | |
243 | { "no", tic6x_pid_no }, | |
244 | { "near", tic6x_pid_near }, | |
245 | { "far", tic6x_pid_far } | |
246 | }; | |
247 | ||
248 | /* Handle -mpid=ARG. */ | |
249 | ||
250 | static void | |
251 | tic6x_use_pid (const char *arg) | |
252 | { | |
253 | unsigned int i; | |
254 | ||
255 | for (i = 0; i < ARRAY_SIZE (tic6x_pid_types); i++) | |
256 | if (strcmp (arg, tic6x_pid_types[i].arg) == 0) | |
257 | { | |
258 | tic6x_pid = tic6x_pid_types[i].attr; | |
259 | return; | |
260 | } | |
261 | ||
262 | as_bad (_("unknown -mpid= argument '%s'"), arg); | |
263 | } | |
264 | ||
40b36596 JM |
265 | /* Parse a target-specific option. */ |
266 | ||
267 | int | |
17b9d67d | 268 | md_parse_option (int c, const char *arg) |
40b36596 JM |
269 | { |
270 | switch (c) | |
271 | { | |
272 | case OPTION_MARCH: | |
273 | tic6x_use_arch (arg); | |
274 | break; | |
275 | ||
40b36596 JM |
276 | case OPTION_MBIG_ENDIAN: |
277 | target_big_endian = 1; | |
278 | break; | |
279 | ||
280 | case OPTION_MLITTLE_ENDIAN: | |
281 | target_big_endian = 0; | |
282 | break; | |
283 | ||
b5593623 JM |
284 | case OPTION_MDSBT: |
285 | tic6x_dsbt = 1; | |
286 | break; | |
287 | ||
288 | case OPTION_MNO_DSBT: | |
289 | tic6x_dsbt = 0; | |
290 | break; | |
291 | ||
87779176 JM |
292 | case OPTION_MPID: |
293 | tic6x_use_pid (arg); | |
294 | break; | |
295 | ||
296 | case OPTION_MPIC: | |
297 | tic6x_pic = 1; | |
298 | break; | |
299 | ||
300 | case OPTION_MNO_PIC: | |
301 | tic6x_pic = 0; | |
302 | break; | |
303 | ||
41820509 JM |
304 | case OPTION_MGENERATE_REL: |
305 | tic6x_generate_rela = FALSE; | |
306 | break; | |
307 | ||
40b36596 JM |
308 | default: |
309 | return 0; | |
310 | } | |
311 | return 1; | |
312 | } | |
313 | ||
314 | void | |
315 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
316 | { | |
317 | unsigned int i; | |
318 | ||
319 | fputc ('\n', stream); | |
320 | fprintf (stream, _("TMS320C6000 options:\n")); | |
321 | fprintf (stream, _(" -march=ARCH enable instructions from architecture ARCH\n")); | |
40b36596 JM |
322 | fprintf (stream, _(" -mbig-endian generate big-endian code\n")); |
323 | fprintf (stream, _(" -mlittle-endian generate little-endian code\n")); | |
b5593623 JM |
324 | fprintf (stream, _(" -mdsbt code uses DSBT addressing\n")); |
325 | fprintf (stream, _(" -mno-dsbt code does not use DSBT addressing\n")); | |
87779176 JM |
326 | fprintf (stream, _(" -mpid=no code uses position-dependent data addressing\n")); |
327 | fprintf (stream, _(" -mpid=near code uses position-independent data addressing,\n" | |
328 | " GOT accesses use near DP addressing\n")); | |
329 | fprintf (stream, _(" -mpid=far code uses position-independent data addressing,\n" | |
330 | " GOT accesses use far DP addressing\n")); | |
331 | fprintf (stream, _(" -mpic code addressing is position-independent\n")); | |
332 | fprintf (stream, _(" -mno-pic code addressing is position-dependent\n")); | |
41820509 JM |
333 | /* -mgenerate-rel is only for testsuite use and is deliberately |
334 | undocumented. */ | |
40b36596 JM |
335 | |
336 | fputc ('\n', stream); | |
337 | fprintf (stream, _("Supported ARCH values are:")); | |
338 | for (i = 0; i < ARRAY_SIZE (tic6x_arches); i++) | |
339 | fprintf (stream, " %s", tic6x_arches[i].arch); | |
340 | fputc ('\n', stream); | |
341 | } | |
342 | ||
343 | /* Update enabled features based on the current architecture and | |
344 | related settings. */ | |
345 | static void | |
346 | tic6x_update_features (void) | |
347 | { | |
98d23bef | 348 | tic6x_features = tic6x_arch_enable; |
40b36596 JM |
349 | |
350 | tic6x_num_registers | |
351 | = (tic6x_arch_enable & (TIC6X_INSN_C64X | TIC6X_INSN_C67XP)) ? 32 : 16; | |
352 | ||
353 | tic6x_predicate_a0 = (tic6x_arch_enable & TIC6X_INSN_C64X) ? TRUE : FALSE; | |
354 | ||
355 | tic6x_can_cross_fp_boundary | |
356 | = (tic6x_arch_enable | |
357 | & (TIC6X_INSN_C64X | TIC6X_INSN_C67XP)) ? TRUE : FALSE; | |
358 | ||
359 | tic6x_long_data_constraints | |
360 | = (tic6x_arch_enable & TIC6X_INSN_C64X) ? FALSE : TRUE; | |
361 | ||
362 | tic6x_compact_insns = (tic6x_arch_enable & TIC6X_INSN_C64XP) ? TRUE : FALSE; | |
363 | } | |
364 | ||
365 | /* Do configuration after all options have been parsed. */ | |
366 | ||
367 | void | |
368 | tic6x_after_parse_args (void) | |
369 | { | |
370 | tic6x_update_features (); | |
371 | } | |
372 | ||
1bce6bd8 PB |
373 | /* Parse a .cantunwind directive. */ |
374 | static void | |
375 | s_tic6x_cantunwind (int ignored ATTRIBUTE_UNUSED) | |
376 | { | |
377 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
378 | ||
379 | /* GCC sometimes spits out superfluous .cantunwind directives, so ignore | |
380 | them. */ | |
381 | if (unwind->data_bytes == 0) | |
382 | return; | |
383 | ||
384 | if (unwind->data_bytes != -1) | |
385 | { | |
386 | as_bad (_("unexpected .cantunwind directive")); | |
387 | return; | |
388 | } | |
389 | ||
390 | demand_empty_rest_of_line (); | |
391 | ||
392 | if (unwind->personality_routine || unwind->personality_index != -1) | |
393 | as_bad (_("personality routine specified for cantunwind frame")); | |
394 | ||
395 | unwind->personality_index = -2; | |
396 | } | |
397 | ||
398 | /* Parse a .handlerdata directive. */ | |
399 | static void | |
400 | s_tic6x_handlerdata (int ignored ATTRIBUTE_UNUSED) | |
401 | { | |
402 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
403 | ||
404 | if (!unwind->saved_seg) | |
405 | { | |
406 | as_bad (_("unexpected .handlerdata directive")); | |
407 | return; | |
408 | } | |
409 | ||
410 | if (unwind->table_entry || unwind->personality_index == -2) | |
411 | { | |
412 | as_bad (_("duplicate .handlerdata directive")); | |
413 | return; | |
414 | } | |
415 | ||
416 | if (unwind->personality_index == -1 && unwind->personality_routine == NULL) | |
417 | { | |
418 | as_bad (_("personality routine required before .handlerdata directive")); | |
419 | return; | |
420 | } | |
421 | ||
422 | tic6x_output_unwinding (TRUE); | |
423 | } | |
424 | ||
425 | /* Parse a .endp directive. */ | |
426 | static void | |
427 | s_tic6x_endp (int ignored ATTRIBUTE_UNUSED) | |
428 | { | |
429 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
430 | ||
431 | if (unwind->data_bytes != 0) | |
432 | { | |
433 | /* Output a .exidx entry if we have not already done so. | |
434 | Then switch back to the text section. */ | |
435 | if (!unwind->table_entry) | |
436 | tic6x_output_unwinding (FALSE); | |
437 | ||
438 | subseg_set (unwind->saved_seg, unwind->saved_subseg); | |
439 | } | |
440 | ||
441 | unwind->saved_seg = NULL; | |
442 | unwind->table_entry = NULL; | |
443 | unwind->data_bytes = 0; | |
444 | } | |
445 | ||
446 | /* Parse a .personalityindex directive. */ | |
447 | static void | |
448 | s_tic6x_personalityindex (int ignored ATTRIBUTE_UNUSED) | |
449 | { | |
450 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
451 | expressionS exp; | |
452 | ||
453 | if (unwind->personality_routine || unwind->personality_index != -1) | |
454 | as_bad (_("duplicate .personalityindex directive")); | |
455 | ||
456 | expression (&exp); | |
457 | ||
458 | if (exp.X_op != O_constant | |
459 | || exp.X_add_number < 0 || exp.X_add_number > 15) | |
460 | { | |
461 | as_bad (_("bad personality routine number")); | |
462 | ignore_rest_of_line (); | |
463 | return; | |
464 | } | |
465 | ||
466 | unwind->personality_index = exp.X_add_number; | |
467 | ||
468 | demand_empty_rest_of_line (); | |
469 | } | |
40b36596 | 470 | |
1bce6bd8 PB |
471 | static void |
472 | s_tic6x_personality (int ignored ATTRIBUTE_UNUSED) | |
473 | { | |
d02603dc | 474 | char *name, c; |
1bce6bd8 PB |
475 | tic6x_unwind_info *unwind = tic6x_get_unwind (); |
476 | ||
477 | if (unwind->personality_routine || unwind->personality_index != -1) | |
478 | as_bad (_("duplicate .personality directive")); | |
479 | ||
d02603dc | 480 | c = get_symbol_name (&name); |
1bce6bd8 | 481 | unwind->personality_routine = symbol_find_or_make (name); |
d02603dc | 482 | (void) restore_line_pointer (c); |
1bce6bd8 PB |
483 | demand_empty_rest_of_line (); |
484 | } | |
485 | ||
486 | /* Parse a .arch directive. */ | |
40b36596 JM |
487 | static void |
488 | s_tic6x_arch (int ignored ATTRIBUTE_UNUSED) | |
489 | { | |
490 | char c; | |
491 | char *arch; | |
492 | ||
493 | arch = input_line_pointer; | |
494 | while (*input_line_pointer && !ISSPACE (*input_line_pointer)) | |
495 | input_line_pointer++; | |
496 | c = *input_line_pointer; | |
497 | *input_line_pointer = 0; | |
498 | ||
499 | tic6x_use_arch (arch); | |
500 | tic6x_update_features (); | |
501 | *input_line_pointer = c; | |
502 | demand_empty_rest_of_line (); | |
503 | } | |
504 | ||
2fbb87f6 PB |
505 | /* Parse a .ehtype directive. */ |
506 | ||
507 | static void | |
508 | s_tic6x_ehtype (int ignored ATTRIBUTE_UNUSED) | |
509 | { | |
510 | expressionS exp; | |
511 | char *p; | |
512 | ||
513 | #ifdef md_flush_pending_output | |
514 | md_flush_pending_output (); | |
515 | #endif | |
516 | ||
517 | if (is_it_end_of_statement ()) | |
518 | { | |
519 | demand_empty_rest_of_line (); | |
520 | return; | |
521 | } | |
522 | ||
523 | #ifdef md_cons_align | |
524 | md_cons_align (4); | |
525 | #endif | |
526 | ||
527 | ||
528 | expression (&exp); | |
529 | ||
530 | if (exp.X_op != O_symbol) | |
531 | { | |
532 | as_bad (_("expected symbol")); | |
533 | return; | |
534 | } | |
535 | ||
536 | p = frag_more (4); | |
7e9def1e | 537 | memset (p, 0, 4); |
2fbb87f6 PB |
538 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, |
539 | &exp, 0, BFD_RELOC_C6000_EHTYPE); | |
540 | ||
541 | demand_empty_rest_of_line (); | |
542 | } | |
543 | ||
40b36596 JM |
544 | /* Parse a .nocmp directive. */ |
545 | ||
546 | static void | |
547 | s_tic6x_nocmp (int ignored ATTRIBUTE_UNUSED) | |
548 | { | |
549 | seg_info (now_seg)->tc_segment_info_data.nocmp = TRUE; | |
550 | demand_empty_rest_of_line (); | |
551 | } | |
552 | ||
ac145307 BS |
553 | /* .scomm pseudo-op handler. |
554 | ||
555 | This is a new pseudo-op to handle putting objects in .scommon. | |
556 | By doing this the linker won't need to do any work, | |
557 | and more importantly it removes the implicit -G arg necessary to | |
558 | correctly link the object file. */ | |
559 | ||
560 | static void | |
561 | s_tic6x_scomm (int ignore ATTRIBUTE_UNUSED) | |
562 | { | |
563 | char *name; | |
564 | char c; | |
565 | char *p; | |
566 | offsetT size; | |
567 | symbolS *symbolP; | |
568 | offsetT align; | |
569 | int align2; | |
570 | ||
d02603dc | 571 | c = get_symbol_name (&name); |
ac145307 BS |
572 | |
573 | /* Just after name is now '\0'. */ | |
574 | p = input_line_pointer; | |
d02603dc | 575 | (void) restore_line_pointer (c); |
ac145307 BS |
576 | SKIP_WHITESPACE (); |
577 | if (*input_line_pointer != ',') | |
578 | { | |
579 | as_bad (_("expected comma after symbol name")); | |
580 | ignore_rest_of_line (); | |
581 | return; | |
582 | } | |
583 | ||
584 | /* Skip ','. */ | |
585 | input_line_pointer++; | |
586 | if ((size = get_absolute_expression ()) < 0) | |
587 | { | |
588 | /* xgettext:c-format */ | |
589 | as_warn (_("invalid length for .scomm directive")); | |
590 | ignore_rest_of_line (); | |
591 | return; | |
592 | } | |
593 | ||
594 | /* The third argument to .scomm is the alignment. */ | |
595 | if (*input_line_pointer != ',') | |
596 | align = 8; | |
597 | else | |
598 | { | |
599 | ++input_line_pointer; | |
600 | align = get_absolute_expression (); | |
601 | if (align <= 0) | |
602 | { | |
603 | as_warn (_("alignment is not a positive number")); | |
604 | align = 8; | |
605 | } | |
606 | } | |
607 | ||
608 | /* Convert to a power of 2 alignment. */ | |
609 | if (align) | |
610 | { | |
611 | for (align2 = 0; (align & 1) == 0; align >>= 1, ++align2) | |
612 | continue; | |
613 | if (align != 1) | |
614 | { | |
615 | as_bad (_("alignment is not a power of 2")); | |
616 | ignore_rest_of_line (); | |
617 | return; | |
618 | } | |
619 | } | |
620 | else | |
621 | align2 = 0; | |
622 | ||
623 | *p = 0; | |
624 | symbolP = symbol_find_or_make (name); | |
625 | *p = c; | |
626 | ||
627 | if (S_IS_DEFINED (symbolP)) | |
628 | { | |
629 | /* xgettext:c-format */ | |
630 | as_bad (_("attempt to re-define symbol `%s'"), | |
631 | S_GET_NAME (symbolP)); | |
632 | ignore_rest_of_line (); | |
633 | return; | |
634 | } | |
635 | ||
636 | if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size) | |
637 | { | |
638 | /* xgettext:c-format */ | |
639 | as_bad (_("attempt to redefine `%s' with a different length"), | |
640 | S_GET_NAME (symbolP)); | |
641 | ||
642 | ignore_rest_of_line (); | |
643 | return; | |
644 | } | |
645 | ||
646 | if (symbol_get_obj (symbolP)->local) | |
647 | { | |
648 | segT old_sec = now_seg; | |
649 | int old_subsec = now_subseg; | |
650 | char *pfrag; | |
651 | ||
652 | record_alignment (sbss_section, align2); | |
653 | subseg_set (sbss_section, 0); | |
654 | ||
655 | if (align2) | |
656 | frag_align (align2, 0, 0); | |
657 | ||
658 | if (S_GET_SEGMENT (symbolP) == sbss_section) | |
659 | symbol_get_frag (symbolP)->fr_symbol = 0; | |
660 | ||
661 | symbol_set_frag (symbolP, frag_now); | |
662 | ||
663 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size, | |
664 | (char *) 0); | |
665 | *pfrag = 0; | |
666 | S_SET_SIZE (symbolP, size); | |
667 | S_SET_SEGMENT (symbolP, sbss_section); | |
668 | S_CLEAR_EXTERNAL (symbolP); | |
669 | subseg_set (old_sec, old_subsec); | |
670 | } | |
671 | else | |
672 | { | |
673 | S_SET_VALUE (symbolP, (valueT) size); | |
674 | S_SET_ALIGN (symbolP, 1 << align2); | |
675 | S_SET_EXTERNAL (symbolP); | |
676 | S_SET_SEGMENT (symbolP, &scom_section); | |
677 | } | |
678 | ||
679 | symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT; | |
680 | ||
681 | demand_empty_rest_of_line (); | |
682 | } | |
683 | ||
59e6276b JM |
684 | /* Track for each attribute whether it has been set explicitly (and so |
685 | should not have a default value set by the assembler). */ | |
686 | static bfd_boolean tic6x_attributes_set_explicitly[NUM_KNOWN_OBJ_ATTRIBUTES]; | |
687 | ||
688 | /* Parse a .c6xabi_attribute directive. */ | |
689 | ||
690 | static void | |
691 | s_tic6x_c6xabi_attribute (int ignored ATTRIBUTE_UNUSED) | |
692 | { | |
0420f52b | 693 | int tag = obj_elf_vendor_attribute (OBJ_ATTR_PROC); |
59e6276b JM |
694 | |
695 | if (tag < NUM_KNOWN_OBJ_ATTRIBUTES) | |
696 | tic6x_attributes_set_explicitly[tag] = TRUE; | |
697 | } | |
698 | ||
699 | typedef struct | |
700 | { | |
701 | const char *name; | |
702 | int tag; | |
703 | } tic6x_attribute_table; | |
704 | ||
705 | static const tic6x_attribute_table tic6x_attributes[] = | |
706 | { | |
b5593623 | 707 | #define TAG(tag, value) { #tag, tag }, |
59e6276b JM |
708 | #include "elf/tic6x-attrs.h" |
709 | #undef TAG | |
710 | }; | |
711 | ||
712 | /* Convert an attribute name to a number. */ | |
713 | ||
714 | int | |
715 | tic6x_convert_symbolic_attribute (const char *name) | |
716 | { | |
717 | unsigned int i; | |
718 | ||
719 | for (i = 0; i < ARRAY_SIZE (tic6x_attributes); i++) | |
720 | if (strcmp (name, tic6x_attributes[i].name) == 0) | |
721 | return tic6x_attributes[i].tag; | |
722 | ||
723 | return -1; | |
724 | } | |
725 | ||
40b36596 JM |
726 | const pseudo_typeS md_pseudo_table[] = |
727 | { | |
728 | { "arch", s_tic6x_arch, 0 }, | |
59e6276b | 729 | { "c6xabi_attribute", s_tic6x_c6xabi_attribute, 0 }, |
40b36596 | 730 | { "nocmp", s_tic6x_nocmp, 0 }, |
ac145307 | 731 | { "scomm", s_tic6x_scomm, 0 }, |
40b36596 | 732 | { "word", cons, 4 }, |
2fbb87f6 | 733 | { "ehtype", s_tic6x_ehtype, 0 }, |
1bce6bd8 PB |
734 | { "endp", s_tic6x_endp, 0 }, |
735 | { "handlerdata", s_tic6x_handlerdata, 0 }, | |
736 | { "personalityindex", s_tic6x_personalityindex, 0 }, | |
737 | { "personality", s_tic6x_personality, 0 }, | |
738 | { "cantunwind", s_tic6x_cantunwind, 0 }, | |
40b36596 JM |
739 | { 0, 0, 0 } |
740 | }; | |
741 | ||
742 | /* Hash table of opcodes. For each opcode name, this stores a pointer | |
743 | to a tic6x_opcode_list listing (in an arbitrary order) all opcode | |
744 | table entries with that name. */ | |
745 | static struct hash_control *opcode_hash; | |
746 | ||
747 | /* Initialize the assembler (called once at assembler startup). */ | |
748 | ||
749 | void | |
750 | md_begin (void) | |
751 | { | |
752 | tic6x_opcode_id id; | |
ac145307 BS |
753 | flagword applicable; |
754 | segT seg; | |
755 | subsegT subseg; | |
40b36596 JM |
756 | |
757 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); | |
758 | ||
759 | /* Insert opcodes into the hash table. */ | |
760 | opcode_hash = hash_new (); | |
761 | for (id = 0; id < tic6x_opcode_max; id++) | |
762 | { | |
763 | const char *errmsg; | |
764 | tic6x_opcode_list *opc = xmalloc (sizeof (tic6x_opcode_list)); | |
765 | ||
766 | opc->id = id; | |
767 | opc->next = hash_find (opcode_hash, tic6x_opcode_table[id].name); | |
768 | if ((errmsg = hash_jam (opcode_hash, tic6x_opcode_table[id].name, opc)) | |
769 | != NULL) | |
770 | as_fatal ("%s", _(errmsg)); | |
771 | } | |
ac145307 BS |
772 | |
773 | /* Save the current subseg so we can restore it [it's the default one and | |
774 | we don't want the initial section to be .sbss]. */ | |
775 | seg = now_seg; | |
776 | subseg = now_subseg; | |
777 | ||
778 | /* The sbss section is for local .scomm symbols. */ | |
779 | sbss_section = subseg_new (".bss", 0); | |
780 | seg_info (sbss_section)->bss = 1; | |
781 | ||
782 | /* This is copied from perform_an_assembly_pass. */ | |
783 | applicable = bfd_applicable_section_flags (stdoutput); | |
784 | bfd_set_section_flags (stdoutput, sbss_section, applicable & SEC_ALLOC); | |
785 | ||
786 | subseg_set (seg, subseg); | |
787 | ||
788 | /* We must construct a fake section similar to bfd_com_section | |
789 | but with the name .scommon. */ | |
45dfa85a | 790 | scom_section = *bfd_com_section_ptr; |
ac145307 BS |
791 | scom_section.name = ".scommon"; |
792 | scom_section.output_section = & scom_section; | |
793 | scom_section.symbol = & scom_symbol; | |
794 | scom_section.symbol_ptr_ptr = & scom_section.symbol; | |
45dfa85a | 795 | scom_symbol = * bfd_com_section_ptr->symbol; |
ac145307 BS |
796 | scom_symbol.name = ".scommon"; |
797 | scom_symbol.section = & scom_section; | |
40b36596 JM |
798 | } |
799 | ||
800 | /* Whether the current line being parsed had the "||" parallel bars. */ | |
801 | static bfd_boolean tic6x_line_parallel; | |
802 | ||
803 | /* Whether the current line being parsed started "||^" to indicate an | |
804 | SPMASKed parallel instruction. */ | |
805 | static bfd_boolean tic6x_line_spmask; | |
806 | ||
807 | /* If the current line being parsed had an instruction predicate, the | |
808 | creg value for that predicate (which must be nonzero); otherwise | |
809 | 0. */ | |
810 | static unsigned int tic6x_line_creg; | |
811 | ||
812 | /* If the current line being parsed had an instruction predicate, the | |
813 | z value for that predicate; otherwise 0. */ | |
814 | static unsigned int tic6x_line_z; | |
815 | ||
816 | /* Return 1 (updating input_line_pointer as appropriate) if the line | |
817 | starting with C (immediately before input_line_pointer) starts with | |
818 | pre-opcode text appropriate for this target, 0 otherwise. */ | |
819 | ||
820 | int | |
821 | tic6x_unrecognized_line (int c) | |
822 | { | |
823 | char *p, *endp; | |
824 | unsigned int z; | |
825 | bfd_boolean areg; | |
826 | bfd_boolean bad_predicate; | |
827 | ||
828 | switch (c) | |
829 | { | |
830 | case '|': | |
831 | if (input_line_pointer[0] == '|') | |
832 | { | |
833 | if (input_line_pointer[1] == '^') | |
834 | { | |
835 | tic6x_line_spmask = TRUE; | |
836 | input_line_pointer += 2; | |
837 | } | |
838 | else | |
839 | input_line_pointer += 1; | |
840 | if (tic6x_line_parallel) | |
841 | as_bad (_("multiple '||' on same line")); | |
842 | tic6x_line_parallel = TRUE; | |
843 | if (tic6x_line_creg) | |
844 | as_bad (_("'||' after predicate")); | |
845 | return 1; | |
846 | } | |
847 | return 0; | |
848 | ||
849 | case '[': | |
850 | /* If it doesn't look like a predicate at all, just return 0. | |
851 | If it looks like one but not a valid one, give a better | |
852 | error. */ | |
853 | p = input_line_pointer; | |
854 | while (*p != ']' && !is_end_of_line[(unsigned char) *p]) | |
855 | p++; | |
856 | if (*p != ']') | |
857 | return 0; | |
858 | endp = p + 1; | |
859 | p = input_line_pointer; | |
860 | z = 0; | |
861 | bad_predicate = FALSE; | |
862 | if (*p == '!') | |
863 | { | |
864 | z = 1; | |
865 | p++; | |
866 | } | |
867 | if (*p == 'A' || *p == 'a') | |
868 | areg = TRUE; | |
869 | else if (*p == 'B' || *p == 'b') | |
870 | areg = FALSE; | |
871 | else | |
872 | { | |
873 | areg = TRUE; /* Avoid uninitialized warning. */ | |
874 | bad_predicate = TRUE; | |
875 | } | |
876 | if (!bad_predicate) | |
877 | { | |
878 | p++; | |
879 | if (*p != '0' && *p != '1' && *p != '2') | |
880 | bad_predicate = TRUE; | |
881 | else if (p[1] != ']') | |
882 | bad_predicate = TRUE; | |
883 | else | |
884 | input_line_pointer = p + 2; | |
885 | } | |
886 | ||
887 | if (tic6x_line_creg) | |
888 | as_bad (_("multiple predicates on same line")); | |
889 | ||
890 | if (bad_predicate) | |
891 | { | |
892 | char ctmp = *endp; | |
893 | *endp = 0; | |
894 | as_bad (_("bad predicate '%s'"), input_line_pointer - 1); | |
895 | *endp = ctmp; | |
896 | input_line_pointer = endp; | |
897 | return 1; | |
898 | } | |
899 | ||
900 | switch (*p) | |
901 | { | |
902 | case '0': | |
903 | tic6x_line_creg = (areg ? 6 : 1); | |
904 | if (areg && !tic6x_predicate_a0) | |
905 | as_bad (_("predication on A0 not supported on this architecture")); | |
906 | break; | |
907 | ||
908 | case '1': | |
909 | tic6x_line_creg = (areg ? 4 : 2); | |
910 | break; | |
911 | ||
912 | case '2': | |
913 | tic6x_line_creg = (areg ? 5 : 3); | |
914 | break; | |
915 | ||
916 | default: | |
917 | abort (); | |
918 | } | |
919 | ||
920 | tic6x_line_z = z; | |
921 | return 1; | |
922 | ||
923 | default: | |
924 | return 0; | |
925 | } | |
926 | } | |
927 | ||
928 | /* Do any target-specific handling of a label required. */ | |
929 | ||
930 | void | |
d99e5b39 | 931 | tic6x_frob_label (symbolS *sym) |
40b36596 | 932 | { |
d99e5b39 JM |
933 | segment_info_type *si; |
934 | tic6x_label_list *list; | |
935 | ||
40b36596 JM |
936 | if (tic6x_line_parallel) |
937 | { | |
938 | as_bad (_("label after '||'")); | |
939 | tic6x_line_parallel = FALSE; | |
940 | tic6x_line_spmask = FALSE; | |
941 | } | |
942 | if (tic6x_line_creg) | |
943 | { | |
944 | as_bad (_("label after predicate")); | |
945 | tic6x_line_creg = 0; | |
946 | tic6x_line_z = 0; | |
947 | } | |
948 | ||
d99e5b39 JM |
949 | si = seg_info (now_seg); |
950 | list = si->tc_segment_info_data.label_list; | |
951 | si->tc_segment_info_data.label_list = xmalloc (sizeof (tic6x_label_list)); | |
952 | si->tc_segment_info_data.label_list->next = list; | |
953 | si->tc_segment_info_data.label_list->label = sym; | |
40b36596 JM |
954 | |
955 | /* Defining tc_frob_label overrides the ELF definition of | |
956 | obj_frob_label, so we need to apply its effects here. */ | |
957 | dwarf2_emit_label (sym); | |
958 | } | |
959 | ||
960 | /* At end-of-line, give errors for start-of-line decorations that | |
961 | needed an instruction but were not followed by one. */ | |
962 | ||
963 | static void | |
964 | tic6x_end_of_line (void) | |
965 | { | |
966 | if (tic6x_line_parallel) | |
967 | { | |
968 | as_bad (_("'||' not followed by instruction")); | |
969 | tic6x_line_parallel = FALSE; | |
970 | tic6x_line_spmask = FALSE; | |
971 | } | |
972 | if (tic6x_line_creg) | |
973 | { | |
974 | as_bad (_("predicate not followed by instruction")); | |
975 | tic6x_line_creg = 0; | |
976 | tic6x_line_z = 0; | |
977 | } | |
978 | } | |
979 | ||
980 | /* Do any target-specific handling of the start of a logical line. */ | |
981 | ||
982 | void | |
983 | tic6x_start_line_hook (void) | |
984 | { | |
985 | tic6x_end_of_line (); | |
986 | } | |
987 | ||
d99e5b39 JM |
988 | /* Do target-specific handling immediately after an input file from |
989 | the command line, and any other inputs it includes, have been | |
990 | read. */ | |
40b36596 JM |
991 | |
992 | void | |
993 | tic6x_cleanup (void) | |
994 | { | |
995 | tic6x_end_of_line (); | |
996 | } | |
997 | ||
41820509 JM |
998 | /* Do target-specific initialization after arguments have been |
999 | processed and the output file created. */ | |
1000 | ||
1001 | void | |
1002 | tic6x_init_after_args (void) | |
1003 | { | |
1004 | elf32_tic6x_set_use_rela_p (stdoutput, tic6x_generate_rela); | |
1005 | } | |
1006 | ||
d99e5b39 JM |
1007 | /* Free LIST of labels (possibly NULL). */ |
1008 | ||
1009 | static void | |
1010 | tic6x_free_label_list (tic6x_label_list *list) | |
1011 | { | |
1012 | while (list) | |
1013 | { | |
1014 | tic6x_label_list *old = list; | |
1015 | ||
1016 | list = list->next; | |
1017 | free (old); | |
1018 | } | |
1019 | } | |
1020 | ||
40b36596 JM |
1021 | /* Handle a data alignment of N bytes. */ |
1022 | ||
1023 | void | |
1024 | tic6x_cons_align (int n ATTRIBUTE_UNUSED) | |
1025 | { | |
1026 | segment_info_type *seginfo = seg_info (now_seg); | |
1027 | ||
1028 | /* Data means there is no current execute packet, and that any label | |
1029 | applies to that data rather than a subsequent instruction. */ | |
d99e5b39 JM |
1030 | tic6x_free_label_list (seginfo->tc_segment_info_data.label_list); |
1031 | seginfo->tc_segment_info_data.label_list = NULL; | |
1032 | seginfo->tc_segment_info_data.execute_packet_frag = NULL; | |
40b36596 JM |
1033 | seginfo->tc_segment_info_data.last_insn_lsb = NULL; |
1034 | seginfo->tc_segment_info_data.spmask_addr = NULL; | |
38bd8d09 | 1035 | seginfo->tc_segment_info_data.func_units_used = 0; |
40b36596 JM |
1036 | } |
1037 | ||
d99e5b39 JM |
1038 | /* Handle an alignment directive. Return TRUE if the |
1039 | machine-independent frag generation should be skipped. */ | |
1040 | ||
1041 | bfd_boolean | |
1042 | tic6x_do_align (int n, char *fill, int len ATTRIBUTE_UNUSED, int max) | |
1043 | { | |
1044 | /* Given code alignments of 4, 8, 16 or 32 bytes, we try to handle | |
1045 | them in the md_end pass by inserting NOPs in parallel with | |
1046 | previous instructions. We only do this in sections containing | |
1047 | nothing but instructions. Code alignments of 1 or 2 bytes have | |
1048 | no effect in such sections (but we record them with | |
1049 | machine-dependent frags anyway so they can be skipped or | |
1050 | converted to machine-independent), while those of more than 64 | |
1051 | bytes cannot reliably be handled in this way. */ | |
1052 | if (n > 0 | |
1053 | && max >= 0 | |
1054 | && max < (1 << n) | |
1055 | && !need_pass_2 | |
1056 | && fill == NULL | |
1057 | && subseg_text_p (now_seg)) | |
1058 | { | |
1059 | fragS *align_frag; | |
1060 | char *p; | |
1061 | ||
1062 | if (n > 5) | |
1063 | return FALSE; | |
1064 | ||
1065 | /* Machine-independent code would generate a frag here, but we | |
1066 | wish to handle it in a machine-dependent way. */ | |
1067 | if (frag_now_fix () != 0) | |
1068 | { | |
1069 | if (frag_now->fr_type != rs_machine_dependent) | |
1070 | frag_wane (frag_now); | |
1071 | ||
1072 | frag_new (0); | |
1073 | } | |
1074 | frag_grow (32); | |
1075 | align_frag = frag_now; | |
1076 | p = frag_var (rs_machine_dependent, 32, 32, max, NULL, n, NULL); | |
1077 | /* This must be the same as the frag to which a pointer was just | |
1078 | saved. */ | |
1079 | if (p != align_frag->fr_literal) | |
1080 | abort (); | |
1081 | align_frag->tc_frag_data.is_insns = FALSE; | |
1082 | return TRUE; | |
1083 | } | |
1084 | else | |
1085 | return FALSE; | |
1086 | } | |
1087 | ||
40b36596 JM |
1088 | /* Types of operand for parsing purposes. These are used as bit-masks |
1089 | to tell tic6x_parse_operand what forms of operand are | |
1090 | permitted. */ | |
1091 | #define TIC6X_OP_EXP 0x0001u | |
1092 | #define TIC6X_OP_REG 0x0002u | |
1093 | #define TIC6X_OP_REGPAIR 0x0004u | |
1094 | #define TIC6X_OP_IRP 0x0008u | |
1095 | #define TIC6X_OP_NRP 0x0010u | |
1096 | /* With TIC6X_OP_MEM_NOUNREG, the contents of a () offset are always | |
1097 | interpreted as an expression, which may be a symbol with the same | |
1098 | name as a register that ends up being implicitly DP-relative. With | |
1099 | TIC6X_OP_MEM_UNREG, the contents of a () offset are interpreted as | |
1100 | a register if they match one, and failing that as an expression, | |
1101 | which must be constant. */ | |
1102 | #define TIC6X_OP_MEM_NOUNREG 0x0020u | |
1103 | #define TIC6X_OP_MEM_UNREG 0x0040u | |
1104 | #define TIC6X_OP_CTRL 0x0080u | |
1105 | #define TIC6X_OP_FUNC_UNIT 0x0100u | |
1106 | ||
1107 | /* A register or register pair read by the assembler. */ | |
1108 | typedef struct | |
1109 | { | |
1110 | /* The side the register is on (1 or 2). */ | |
1111 | unsigned int side; | |
1112 | /* The register number (0 to 31). */ | |
1113 | unsigned int num; | |
1114 | } tic6x_register; | |
1115 | ||
1116 | /* Types of modification of a base address. */ | |
1117 | typedef enum | |
1118 | { | |
1119 | tic6x_mem_mod_none, | |
1120 | tic6x_mem_mod_plus, | |
1121 | tic6x_mem_mod_minus, | |
1122 | tic6x_mem_mod_preinc, | |
1123 | tic6x_mem_mod_predec, | |
1124 | tic6x_mem_mod_postinc, | |
1125 | tic6x_mem_mod_postdec | |
1126 | } tic6x_mem_mod; | |
1127 | ||
1128 | /* Scaled [] or unscaled () nature of an offset. */ | |
1129 | typedef enum | |
1130 | { | |
1131 | tic6x_offset_none, | |
1132 | tic6x_offset_scaled, | |
1133 | tic6x_offset_unscaled | |
1134 | } tic6x_mem_scaling; | |
1135 | ||
1136 | /* A memory operand read by the assembler. */ | |
1137 | typedef struct | |
1138 | { | |
1139 | /* The base register. */ | |
1140 | tic6x_register base_reg; | |
1141 | /* How the base register is modified. */ | |
1142 | tic6x_mem_mod mod; | |
1143 | /* Whether there is an offset (required with plain "+" and "-"), and | |
1144 | whether it is scaled or unscaled if so. */ | |
1145 | tic6x_mem_scaling scaled; | |
1146 | /* Whether the offset is a register (TRUE) or an expression | |
1147 | (FALSE). */ | |
1148 | bfd_boolean offset_is_reg; | |
1149 | /* The offset. */ | |
1150 | union | |
1151 | { | |
1152 | expressionS exp; | |
1153 | tic6x_register reg; | |
1154 | } offset; | |
1155 | } tic6x_mem_ref; | |
1156 | ||
1157 | /* A functional unit in SPMASK operands read by the assembler. */ | |
1158 | typedef struct | |
1159 | { | |
1160 | /* The basic unit. */ | |
1161 | tic6x_func_unit_base base; | |
1162 | /* The side (1 or 2). */ | |
1163 | unsigned int side; | |
1164 | } tic6x_func_unit_operand; | |
1165 | ||
1166 | /* An operand read by the assembler. */ | |
1167 | typedef struct | |
1168 | { | |
1169 | /* The syntactic form of the operand, as one of the bit-masks | |
1170 | above. */ | |
1171 | unsigned int form; | |
1172 | /* The operand value. */ | |
1173 | union | |
1174 | { | |
1175 | /* An expression: TIC6X_OP_EXP. */ | |
1176 | expressionS exp; | |
1177 | /* A register: TIC6X_OP_REG, TIC6X_OP_REGPAIR. */ | |
1178 | tic6x_register reg; | |
1179 | /* A memory reference: TIC6X_OP_MEM_NOUNREG, | |
1180 | TIC6X_OP_MEM_UNREG. */ | |
1181 | tic6x_mem_ref mem; | |
1182 | /* A control register: TIC6X_OP_CTRL. */ | |
1183 | tic6x_ctrl_id ctrl; | |
1184 | /* A functional unit: TIC6X_OP_FUNC_UNIT. */ | |
1185 | tic6x_func_unit_operand func_unit; | |
1186 | } value; | |
1187 | } tic6x_operand; | |
1188 | ||
1189 | #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0) | |
1190 | ||
1191 | /* Parse a register operand, or part of an operand, starting at *P. | |
1192 | If syntactically OK (including that the number is in the range 0 to | |
1193 | 31, but not necessarily in range for this architecture), return | |
1194 | TRUE, putting the register side and number in *REG and update *P to | |
1195 | point immediately after the register number; otherwise return FALSE | |
1196 | without changing *P (but possibly changing *REG). Do not print any | |
1197 | diagnostics. */ | |
1198 | ||
1199 | static bfd_boolean | |
1200 | tic6x_parse_register (char **p, tic6x_register *reg) | |
1201 | { | |
1202 | char *r = *p; | |
1203 | ||
1204 | switch (*r) | |
1205 | { | |
1206 | case 'a': | |
1207 | case 'A': | |
1208 | reg->side = 1; | |
1209 | break; | |
1210 | ||
1211 | case 'b': | |
1212 | case 'B': | |
1213 | reg->side = 2; | |
1214 | break; | |
1215 | ||
1216 | default: | |
1217 | return FALSE; | |
1218 | } | |
1219 | r++; | |
1220 | ||
1221 | if (*r >= '0' && *r <= '9') | |
1222 | { | |
1223 | reg->num = *r - '0'; | |
1224 | r++; | |
1225 | } | |
1226 | else | |
1227 | return FALSE; | |
1228 | ||
1229 | if (reg->num > 0 && *r >= '0' && *r <= '9') | |
1230 | { | |
1231 | reg->num = reg->num * 10 + (*r - '0'); | |
1232 | r++; | |
1233 | } | |
1234 | ||
1235 | if (*r >= '0' && *r <= '9') | |
1236 | return FALSE; | |
1237 | ||
1238 | if (reg->num >= 32) | |
1239 | return FALSE; | |
1240 | *p = r; | |
1241 | return TRUE; | |
1242 | } | |
1243 | ||
1244 | /* Parse the initial two characters of a functional unit name starting | |
1245 | at *P. If OK, set *BASE and *SIDE and return TRUE; otherwise, | |
1246 | return FALSE. */ | |
1247 | ||
1248 | static bfd_boolean | |
1249 | tic6x_parse_func_unit_base (char *p, tic6x_func_unit_base *base, | |
1250 | unsigned int *side) | |
1251 | { | |
1252 | bfd_boolean good_func_unit = TRUE; | |
1253 | tic6x_func_unit_base maybe_base = tic6x_func_unit_nfu; | |
1254 | unsigned int maybe_side = 0; | |
1255 | ||
1256 | switch (p[0]) | |
1257 | { | |
1258 | case 'd': | |
1259 | case 'D': | |
1260 | maybe_base = tic6x_func_unit_d; | |
1261 | break; | |
1262 | ||
1263 | case 'l': | |
1264 | case 'L': | |
1265 | maybe_base = tic6x_func_unit_l; | |
1266 | break; | |
1267 | ||
1268 | case 'm': | |
1269 | case 'M': | |
1270 | maybe_base = tic6x_func_unit_m; | |
1271 | break; | |
1272 | ||
1273 | case 's': | |
1274 | case 'S': | |
1275 | maybe_base = tic6x_func_unit_s; | |
1276 | break; | |
1277 | ||
1278 | default: | |
1279 | good_func_unit = FALSE; | |
1280 | break; | |
1281 | } | |
1282 | ||
1283 | if (good_func_unit) | |
1284 | switch (p[1]) | |
1285 | { | |
1286 | case '1': | |
1287 | maybe_side = 1; | |
1288 | break; | |
1289 | ||
1290 | case '2': | |
1291 | maybe_side = 2; | |
1292 | break; | |
1293 | ||
1294 | default: | |
1295 | good_func_unit = FALSE; | |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | if (good_func_unit) | |
1300 | { | |
1301 | *base = maybe_base; | |
1302 | *side = maybe_side; | |
1303 | } | |
1304 | ||
1305 | return good_func_unit; | |
1306 | } | |
1307 | ||
1308 | /* Parse an operand starting at *P. If the operand parses OK, return | |
1309 | TRUE and store the value in *OP; otherwise return FALSE (possibly | |
1310 | changing *OP). In any case, update *P to point to the following | |
1311 | comma or end of line. The possible operand forms are given by | |
1312 | OP_FORMS. For diagnostics, this is operand OPNO of an opcode | |
1313 | starting at STR, length OPC_LEN. */ | |
1314 | ||
1315 | static bfd_boolean | |
1316 | tic6x_parse_operand (char **p, tic6x_operand *op, unsigned int op_forms, | |
1317 | char *str, int opc_len, unsigned int opno) | |
1318 | { | |
1319 | bfd_boolean operand_parsed = FALSE; | |
1320 | char *q = *p; | |
1321 | ||
1322 | if ((op_forms & (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG)) | |
1323 | == (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG)) | |
1324 | abort (); | |
1325 | ||
1326 | /* Check for functional unit names for SPMASK and SPMASKR. */ | |
1327 | if (!operand_parsed && (op_forms & TIC6X_OP_FUNC_UNIT)) | |
1328 | { | |
1329 | tic6x_func_unit_base base = tic6x_func_unit_nfu; | |
1330 | unsigned int side = 0; | |
1331 | ||
1332 | if (tic6x_parse_func_unit_base (q, &base, &side)) | |
1333 | { | |
1334 | char *rq = q + 2; | |
1335 | ||
1336 | skip_whitespace (rq); | |
1337 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1338 | { | |
1339 | op->form = TIC6X_OP_FUNC_UNIT; | |
1340 | op->value.func_unit.base = base; | |
1341 | op->value.func_unit.side = side; | |
1342 | operand_parsed = TRUE; | |
1343 | q = rq; | |
1344 | } | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | /* Check for literal "irp". */ | |
1349 | if (!operand_parsed && (op_forms & TIC6X_OP_IRP)) | |
1350 | { | |
1351 | if ((q[0] == 'i' || q[0] == 'I') | |
1352 | && (q[1] == 'r' || q[1] == 'R') | |
1353 | && (q[2] == 'p' || q[2] == 'P')) | |
1354 | { | |
1355 | char *rq = q + 3; | |
1356 | ||
1357 | skip_whitespace (rq); | |
1358 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1359 | { | |
1360 | op->form = TIC6X_OP_IRP; | |
1361 | operand_parsed = TRUE; | |
1362 | q = rq; | |
1363 | } | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | /* Check for literal "nrp". */ | |
1368 | if (!operand_parsed && (op_forms & TIC6X_OP_NRP)) | |
1369 | { | |
1370 | if ((q[0] == 'n' || q[0] == 'N') | |
1371 | && (q[1] == 'r' || q[1] == 'R') | |
1372 | && (q[2] == 'p' || q[2] == 'P')) | |
1373 | { | |
1374 | char *rq = q + 3; | |
1375 | ||
1376 | skip_whitespace (rq); | |
1377 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1378 | { | |
1379 | op->form = TIC6X_OP_NRP; | |
1380 | operand_parsed = TRUE; | |
1381 | q = rq; | |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | /* Check for control register names. */ | |
1387 | if (!operand_parsed && (op_forms & TIC6X_OP_CTRL)) | |
1388 | { | |
1389 | tic6x_ctrl_id crid; | |
1390 | ||
1391 | for (crid = 0; crid < tic6x_ctrl_max; crid++) | |
1392 | { | |
1393 | size_t len = strlen (tic6x_ctrl_table[crid].name); | |
1394 | ||
1395 | if (strncasecmp (tic6x_ctrl_table[crid].name, q, len) == 0) | |
1396 | { | |
1397 | char *rq = q + len; | |
1398 | ||
1399 | skip_whitespace (rq); | |
1400 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1401 | { | |
1402 | op->form = TIC6X_OP_CTRL; | |
1403 | op->value.ctrl = crid; | |
1404 | operand_parsed = TRUE; | |
1405 | q = rq; | |
1406 | if (!(tic6x_ctrl_table[crid].isa_variants & tic6x_features)) | |
1407 | as_bad (_("control register '%s' not supported " | |
1408 | "on this architecture"), | |
1409 | tic6x_ctrl_table[crid].name); | |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | /* See if this looks like a memory reference. */ | |
1416 | if (!operand_parsed | |
1417 | && (op_forms & (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG))) | |
1418 | { | |
1419 | bfd_boolean mem_ok = TRUE; | |
1420 | char *mq = q; | |
1421 | tic6x_mem_mod mem_mod = tic6x_mem_mod_none; | |
1422 | tic6x_register base_reg; | |
1423 | bfd_boolean require_offset, permit_offset; | |
1424 | tic6x_mem_scaling scaled; | |
1425 | bfd_boolean offset_is_reg; | |
1426 | expressionS offset_exp; | |
1427 | tic6x_register offset_reg; | |
1428 | ||
1429 | if (*mq == '*') | |
1430 | mq++; | |
1431 | else | |
1432 | mem_ok = FALSE; | |
1433 | ||
1434 | if (mem_ok) | |
1435 | { | |
1436 | skip_whitespace (mq); | |
1437 | switch (*mq) | |
1438 | { | |
1439 | case '+': | |
1440 | if (mq[1] == '+') | |
1441 | { | |
1442 | mem_mod = tic6x_mem_mod_preinc; | |
1443 | mq += 2; | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | mem_mod = tic6x_mem_mod_plus; | |
1448 | mq++; | |
1449 | } | |
1450 | break; | |
1451 | ||
1452 | case '-': | |
1453 | if (mq[1] == '-') | |
1454 | { | |
1455 | mem_mod = tic6x_mem_mod_predec; | |
1456 | mq += 2; | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | mem_mod = tic6x_mem_mod_minus; | |
1461 | mq++; | |
1462 | } | |
1463 | break; | |
1464 | ||
1465 | default: | |
1466 | break; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | if (mem_ok) | |
1471 | { | |
1472 | skip_whitespace (mq); | |
1473 | mem_ok = tic6x_parse_register (&mq, &base_reg); | |
1474 | } | |
1475 | ||
1476 | if (mem_ok && mem_mod == tic6x_mem_mod_none) | |
1477 | { | |
1478 | skip_whitespace (mq); | |
1479 | if (mq[0] == '+' && mq[1] == '+') | |
1480 | { | |
1481 | mem_mod = tic6x_mem_mod_postinc; | |
1482 | mq += 2; | |
1483 | } | |
1484 | else if (mq[0] == '-' && mq[1] == '-') | |
1485 | { | |
1486 | mem_mod = tic6x_mem_mod_postdec; | |
1487 | mq += 2; | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | if (mem_mod == tic6x_mem_mod_none) | |
1492 | permit_offset = FALSE; | |
1493 | else | |
1494 | permit_offset = TRUE; | |
1495 | if (mem_mod == tic6x_mem_mod_plus || mem_mod == tic6x_mem_mod_minus) | |
1496 | require_offset = TRUE; | |
1497 | else | |
1498 | require_offset = FALSE; | |
1499 | scaled = tic6x_offset_none; | |
1500 | offset_is_reg = FALSE; | |
1501 | ||
1502 | if (mem_ok && permit_offset) | |
1503 | { | |
1504 | char endc = 0; | |
1505 | ||
1506 | skip_whitespace (mq); | |
1507 | switch (*mq) | |
1508 | { | |
1509 | case '[': | |
1510 | scaled = tic6x_offset_scaled; | |
1511 | mq++; | |
1512 | endc = ']'; | |
1513 | break; | |
1514 | ||
1515 | case '(': | |
1516 | scaled = tic6x_offset_unscaled; | |
1517 | mq++; | |
1518 | endc = ')'; | |
1519 | break; | |
1520 | ||
1521 | default: | |
1522 | break; | |
1523 | } | |
1524 | if (scaled != tic6x_offset_none) | |
1525 | { | |
1526 | skip_whitespace (mq); | |
1527 | if (scaled == tic6x_offset_scaled | |
1528 | || (op_forms & TIC6X_OP_MEM_UNREG)) | |
1529 | { | |
1530 | bfd_boolean reg_ok; | |
1531 | char *rq = mq; | |
1532 | ||
1533 | reg_ok = tic6x_parse_register (&rq, &offset_reg); | |
1534 | if (reg_ok) | |
1535 | { | |
1536 | skip_whitespace (rq); | |
1537 | if (*rq == endc) | |
1538 | { | |
1539 | mq = rq; | |
1540 | offset_is_reg = TRUE; | |
1541 | } | |
1542 | } | |
1543 | } | |
1544 | if (!offset_is_reg) | |
1545 | { | |
1546 | char *save_input_line_pointer; | |
1547 | ||
1548 | save_input_line_pointer = input_line_pointer; | |
1549 | input_line_pointer = mq; | |
1550 | expression (&offset_exp); | |
1551 | mq = input_line_pointer; | |
1552 | input_line_pointer = save_input_line_pointer; | |
1553 | } | |
1554 | skip_whitespace (mq); | |
1555 | if (*mq == endc) | |
1556 | mq++; | |
1557 | else | |
1558 | mem_ok = FALSE; | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | if (mem_ok && require_offset && scaled == tic6x_offset_none) | |
1563 | mem_ok = FALSE; | |
1564 | ||
1565 | if (mem_ok) | |
1566 | { | |
1567 | skip_whitespace (mq); | |
1568 | if (!is_end_of_line[(unsigned char) *mq] && *mq != ',') | |
1569 | mem_ok = FALSE; | |
1570 | } | |
1571 | ||
1572 | if (mem_ok) | |
1573 | { | |
1574 | op->form = op_forms & (TIC6X_OP_MEM_NOUNREG | TIC6X_OP_MEM_UNREG); | |
1575 | op->value.mem.base_reg = base_reg; | |
1576 | op->value.mem.mod = mem_mod; | |
1577 | op->value.mem.scaled = scaled; | |
1578 | op->value.mem.offset_is_reg = offset_is_reg; | |
1579 | if (offset_is_reg) | |
1580 | op->value.mem.offset.reg = offset_reg; | |
1581 | else | |
1582 | op->value.mem.offset.exp = offset_exp; | |
1583 | operand_parsed = TRUE; | |
1584 | q = mq; | |
1585 | if (base_reg.num >= tic6x_num_registers) | |
1586 | as_bad (_("register number %u not supported on this architecture"), | |
1587 | base_reg.num); | |
1588 | if (offset_is_reg && offset_reg.num >= tic6x_num_registers) | |
1589 | as_bad (_("register number %u not supported on this architecture"), | |
1590 | offset_reg.num); | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | /* See if this looks like a register or register pair. */ | |
1595 | if (!operand_parsed && (op_forms & (TIC6X_OP_REG | TIC6X_OP_REGPAIR))) | |
1596 | { | |
3fc1d038 | 1597 | tic6x_register first_reg, second_reg; |
40b36596 JM |
1598 | bfd_boolean reg_ok; |
1599 | char *rq = q; | |
1600 | ||
1601 | reg_ok = tic6x_parse_register (&rq, &first_reg); | |
1602 | ||
1603 | if (reg_ok) | |
1604 | { | |
1605 | if (*rq == ':' && (op_forms & TIC6X_OP_REGPAIR)) | |
1606 | { | |
1607 | rq++; | |
1608 | reg_ok = tic6x_parse_register (&rq, &second_reg); | |
1609 | if (reg_ok) | |
1610 | { | |
1611 | skip_whitespace (rq); | |
1612 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1613 | { | |
1614 | if ((second_reg.num & 1) | |
1615 | || (first_reg.num != second_reg.num + 1) | |
1616 | || (first_reg.side != second_reg.side)) | |
1617 | as_bad (_("register pair for operand %u of '%.*s'" | |
1618 | " not a valid even/odd pair"), opno, | |
1619 | opc_len, str); | |
1620 | op->form = TIC6X_OP_REGPAIR; | |
1621 | op->value.reg = second_reg; | |
1622 | operand_parsed = TRUE; | |
1623 | q = rq; | |
1624 | } | |
1625 | } | |
1626 | } | |
1627 | else if (op_forms & TIC6X_OP_REG) | |
1628 | { | |
1629 | skip_whitespace (rq); | |
1630 | if (is_end_of_line[(unsigned char) *rq] || *rq == ',') | |
1631 | { | |
1632 | op->form = TIC6X_OP_REG; | |
1633 | op->value.reg = first_reg; | |
1634 | operand_parsed = TRUE; | |
1635 | q = rq; | |
1636 | } | |
1637 | } | |
1638 | } | |
1639 | if (operand_parsed) | |
1640 | { | |
1641 | if (first_reg.num >= tic6x_num_registers) | |
1642 | as_bad (_("register number %u not supported on this architecture"), | |
1643 | first_reg.num); | |
1644 | if (op->form == TIC6X_OP_REGPAIR | |
1645 | && second_reg.num >= tic6x_num_registers) | |
1646 | as_bad (_("register number %u not supported on this architecture"), | |
1647 | second_reg.num); | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | /* Otherwise, parse it as an expression. */ | |
1652 | if (!operand_parsed && (op_forms & TIC6X_OP_EXP)) | |
1653 | { | |
1654 | char *save_input_line_pointer; | |
1655 | ||
1656 | save_input_line_pointer = input_line_pointer; | |
1657 | input_line_pointer = q; | |
1658 | op->form = TIC6X_OP_EXP; | |
1659 | expression (&op->value.exp); | |
1660 | q = input_line_pointer; | |
1661 | input_line_pointer = save_input_line_pointer; | |
1662 | operand_parsed = TRUE; | |
1663 | } | |
1664 | ||
1665 | if (operand_parsed) | |
1666 | { | |
1667 | /* Now the operand has been parsed, there must be nothing more | |
1668 | before the comma or end of line. */ | |
1669 | skip_whitespace (q); | |
1670 | if (!is_end_of_line[(unsigned char) *q] && *q != ',') | |
1671 | { | |
1672 | operand_parsed = FALSE; | |
1673 | as_bad (_("junk after operand %u of '%.*s'"), opno, | |
1674 | opc_len, str); | |
1675 | while (!is_end_of_line[(unsigned char) *q] && *q != ',') | |
1676 | q++; | |
1677 | } | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | /* This could not be parsed as any acceptable form of | |
1682 | operand. */ | |
1683 | switch (op_forms) | |
1684 | { | |
1685 | case TIC6X_OP_REG | TIC6X_OP_REGPAIR: | |
1686 | as_bad (_("bad register or register pair for operand %u of '%.*s'"), | |
1687 | opno, opc_len, str); | |
1688 | break; | |
1689 | ||
1690 | case TIC6X_OP_REG | TIC6X_OP_CTRL: | |
1691 | case TIC6X_OP_REG: | |
1692 | as_bad (_("bad register for operand %u of '%.*s'"), | |
1693 | opno, opc_len, str); | |
1694 | break; | |
1695 | ||
1696 | case TIC6X_OP_REGPAIR: | |
1697 | as_bad (_("bad register pair for operand %u of '%.*s'"), | |
1698 | opno, opc_len, str); | |
1699 | break; | |
1700 | ||
1701 | case TIC6X_OP_FUNC_UNIT: | |
1702 | as_bad (_("bad functional unit for operand %u of '%.*s'"), | |
1703 | opno, opc_len, str); | |
1704 | break; | |
1705 | ||
1706 | default: | |
1707 | as_bad (_("bad operand %u of '%.*s'"), | |
1708 | opno, opc_len, str); | |
1709 | break; | |
1710 | ||
1711 | } | |
1712 | while (!is_end_of_line[(unsigned char) *q] && *q != ',') | |
1713 | q++; | |
1714 | } | |
1715 | *p = q; | |
1716 | return operand_parsed; | |
1717 | } | |
1718 | ||
1719 | /* Table of assembler operators and associated O_* values. */ | |
1720 | typedef struct | |
1721 | { | |
1722 | const char *name; | |
1723 | operatorT op; | |
1724 | } tic6x_operator_table; | |
1725 | static const tic6x_operator_table tic6x_operators[] = { | |
1726 | #define O_dsbt_index O_md1 | |
1727 | { "dsbt_index", O_dsbt_index }, | |
1728 | #define O_got O_md2 | |
1729 | { "got", O_got }, | |
1730 | #define O_dpr_got O_md3 | |
1731 | { "dpr_got", O_dpr_got }, | |
1732 | #define O_dpr_byte O_md4 | |
1733 | { "dpr_byte", O_dpr_byte }, | |
1734 | #define O_dpr_hword O_md5 | |
1735 | { "dpr_hword", O_dpr_hword }, | |
1736 | #define O_dpr_word O_md6 | |
1737 | { "dpr_word", O_dpr_word }, | |
4a732032 BS |
1738 | #define O_pcr_offset O_md7 |
1739 | { "pcr_offset", O_pcr_offset } | |
40b36596 JM |
1740 | }; |
1741 | ||
1742 | /* Parse a name in some machine-specific way. Used on C6X to handle | |
1743 | assembler operators. */ | |
1744 | ||
1745 | int | |
1746 | tic6x_parse_name (const char *name, expressionS *exprP, | |
1747 | enum expr_mode mode ATTRIBUTE_UNUSED, char *nextchar) | |
1748 | { | |
1749 | char *p = input_line_pointer; | |
1750 | char c, *name_start, *name_end; | |
1751 | const char *inner_name; | |
1752 | unsigned int i; | |
1753 | operatorT op = O_illegal; | |
4a732032 | 1754 | symbolS *sym, *op_sym = NULL; |
40b36596 JM |
1755 | |
1756 | if (*name != '$') | |
1757 | return 0; | |
1758 | ||
1759 | for (i = 0; i < ARRAY_SIZE (tic6x_operators); i++) | |
1760 | if (strcasecmp (name + 1, tic6x_operators[i].name) == 0) | |
1761 | { | |
1762 | op = tic6x_operators[i].op; | |
1763 | break; | |
1764 | } | |
1765 | ||
1766 | if (op == O_illegal) | |
1767 | return 0; | |
1768 | ||
1769 | *input_line_pointer = *nextchar; | |
1770 | skip_whitespace (p); | |
1771 | ||
1772 | if (*p != '(') | |
1773 | { | |
1774 | *input_line_pointer = 0; | |
1775 | return 0; | |
1776 | } | |
1777 | p++; | |
1778 | skip_whitespace (p); | |
1779 | ||
1780 | if (!is_name_beginner (*p)) | |
1781 | { | |
1782 | *input_line_pointer = 0; | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | name_start = p; | |
1787 | p++; | |
1788 | while (is_part_of_name (*p)) | |
1789 | p++; | |
1790 | name_end = p; | |
1791 | skip_whitespace (p); | |
1792 | ||
4a732032 BS |
1793 | if (op == O_pcr_offset) |
1794 | { | |
1795 | char *op_name_start, *op_name_end; | |
1796 | ||
1797 | if (*p != ',') | |
1798 | { | |
1799 | *input_line_pointer = 0; | |
1800 | return 0; | |
1801 | } | |
1802 | p++; | |
1803 | skip_whitespace (p); | |
1804 | ||
1805 | if (!is_name_beginner (*p)) | |
1806 | { | |
1807 | *input_line_pointer = 0; | |
1808 | return 0; | |
1809 | } | |
1810 | ||
1811 | op_name_start = p; | |
1812 | p++; | |
1813 | while (is_part_of_name (*p)) | |
1814 | p++; | |
1815 | op_name_end = p; | |
1816 | skip_whitespace (p); | |
1817 | ||
1818 | c = *op_name_end; | |
1819 | *op_name_end = 0; | |
1820 | op_sym = symbol_find_or_make (op_name_start); | |
1821 | *op_name_end = c; | |
1822 | } | |
1823 | ||
40b36596 JM |
1824 | if (*p != ')') |
1825 | { | |
1826 | *input_line_pointer = 0; | |
1827 | return 0; | |
1828 | } | |
1829 | ||
1830 | input_line_pointer = p + 1; | |
1831 | *nextchar = *input_line_pointer; | |
1832 | *input_line_pointer = 0; | |
1833 | ||
1834 | c = *name_end; | |
1835 | *name_end = 0; | |
1836 | inner_name = name_start; | |
1837 | if (op == O_dsbt_index && strcmp (inner_name, "__c6xabi_DSBT_BASE") != 0) | |
1838 | { | |
1839 | as_bad (_("$DSBT_INDEX must be used with __c6xabi_DSBT_BASE")); | |
1840 | inner_name = "__c6xabi_DSBT_BASE"; | |
1841 | } | |
1842 | sym = symbol_find_or_make (inner_name); | |
1843 | *name_end = c; | |
1844 | ||
1845 | exprP->X_op = op; | |
1846 | exprP->X_add_symbol = sym; | |
1847 | exprP->X_add_number = 0; | |
4a732032 | 1848 | exprP->X_op_symbol = op_sym; |
40b36596 JM |
1849 | exprP->X_md = 0; |
1850 | ||
1851 | return 1; | |
1852 | } | |
1853 | ||
1854 | /* Create a fixup for an expression. Same arguments as fix_new_exp, | |
1855 | plus FIX_ADDA which is TRUE for ADDA instructions (to indicate that | |
1856 | fixes resolving to constants should have those constants implicitly | |
1857 | shifted) and FALSE otherwise, but look for C6X-specific expression | |
1858 | types and adjust the relocations or give errors accordingly. */ | |
1859 | ||
1860 | static void | |
1861 | tic6x_fix_new_exp (fragS *frag, int where, int size, expressionS *exp, | |
1862 | int pcrel, bfd_reloc_code_real_type r_type, | |
1863 | bfd_boolean fix_adda) | |
1864 | { | |
1865 | bfd_reloc_code_real_type new_reloc = BFD_RELOC_UNUSED; | |
4a732032 | 1866 | symbolS *subsy = NULL; |
40b36596 JM |
1867 | fixS *fix; |
1868 | ||
1869 | switch (exp->X_op) | |
1870 | { | |
1871 | case O_dsbt_index: | |
1872 | switch (r_type) | |
1873 | { | |
1874 | case BFD_RELOC_C6000_SBR_U15_W: | |
1875 | new_reloc = BFD_RELOC_C6000_DSBT_INDEX; | |
1876 | break; | |
1877 | ||
1878 | default: | |
1879 | as_bad (_("$DSBT_INDEX not supported in this context")); | |
1880 | return; | |
1881 | } | |
1882 | break; | |
1883 | ||
1884 | case O_got: | |
1885 | switch (r_type) | |
1886 | { | |
1887 | case BFD_RELOC_C6000_SBR_U15_W: | |
1888 | new_reloc = BFD_RELOC_C6000_SBR_GOT_U15_W; | |
1889 | break; | |
1890 | ||
1891 | default: | |
1892 | as_bad (_("$GOT not supported in this context")); | |
1893 | return; | |
1894 | } | |
1895 | break; | |
1896 | ||
1897 | case O_dpr_got: | |
1898 | switch (r_type) | |
1899 | { | |
1900 | case BFD_RELOC_C6000_ABS_L16: | |
1901 | new_reloc = BFD_RELOC_C6000_SBR_GOT_L16_W; | |
1902 | break; | |
1903 | ||
1904 | case BFD_RELOC_C6000_ABS_H16: | |
1905 | new_reloc = BFD_RELOC_C6000_SBR_GOT_H16_W; | |
1906 | break; | |
1907 | ||
1908 | default: | |
1909 | as_bad (_("$DPR_GOT not supported in this context")); | |
1910 | return; | |
1911 | } | |
1912 | break; | |
1913 | ||
1914 | case O_dpr_byte: | |
1915 | switch (r_type) | |
1916 | { | |
1917 | case BFD_RELOC_C6000_ABS_S16: | |
1918 | new_reloc = BFD_RELOC_C6000_SBR_S16; | |
1919 | break; | |
1920 | ||
1921 | case BFD_RELOC_C6000_ABS_L16: | |
1922 | new_reloc = BFD_RELOC_C6000_SBR_L16_B; | |
1923 | break; | |
1924 | ||
1925 | case BFD_RELOC_C6000_ABS_H16: | |
1926 | new_reloc = BFD_RELOC_C6000_SBR_H16_B; | |
1927 | break; | |
1928 | ||
1929 | default: | |
1930 | as_bad (_("$DPR_BYTE not supported in this context")); | |
1931 | return; | |
1932 | } | |
1933 | break; | |
1934 | ||
1935 | case O_dpr_hword: | |
1936 | switch (r_type) | |
1937 | { | |
1938 | case BFD_RELOC_C6000_ABS_L16: | |
1939 | new_reloc = BFD_RELOC_C6000_SBR_L16_H; | |
1940 | break; | |
1941 | ||
1942 | case BFD_RELOC_C6000_ABS_H16: | |
1943 | new_reloc = BFD_RELOC_C6000_SBR_H16_H; | |
1944 | break; | |
1945 | ||
1946 | default: | |
1947 | as_bad (_("$DPR_HWORD not supported in this context")); | |
1948 | return; | |
1949 | } | |
1950 | break; | |
1951 | ||
1952 | case O_dpr_word: | |
1953 | switch (r_type) | |
1954 | { | |
1955 | case BFD_RELOC_C6000_ABS_L16: | |
1956 | new_reloc = BFD_RELOC_C6000_SBR_L16_W; | |
1957 | break; | |
1958 | ||
1959 | case BFD_RELOC_C6000_ABS_H16: | |
1960 | new_reloc = BFD_RELOC_C6000_SBR_H16_W; | |
1961 | break; | |
1962 | ||
1963 | default: | |
1964 | as_bad (_("$DPR_WORD not supported in this context")); | |
1965 | return; | |
1966 | } | |
1967 | break; | |
1968 | ||
4a732032 BS |
1969 | case O_pcr_offset: |
1970 | subsy = exp->X_op_symbol; | |
1971 | switch (r_type) | |
1972 | { | |
1973 | case BFD_RELOC_C6000_ABS_S16: | |
1974 | case BFD_RELOC_C6000_ABS_L16: | |
1975 | new_reloc = BFD_RELOC_C6000_PCR_L16; | |
1976 | break; | |
1977 | ||
1978 | case BFD_RELOC_C6000_ABS_H16: | |
1979 | new_reloc = BFD_RELOC_C6000_PCR_H16; | |
1980 | break; | |
1981 | ||
1982 | default: | |
1983 | as_bad (_("$PCR_OFFSET not supported in this context")); | |
1984 | return; | |
1985 | } | |
1986 | break; | |
1987 | ||
40b36596 JM |
1988 | case O_symbol: |
1989 | break; | |
1990 | ||
1991 | default: | |
1992 | if (pcrel) | |
1993 | { | |
1994 | as_bad (_("invalid PC-relative operand")); | |
1995 | return; | |
1996 | } | |
1997 | break; | |
1998 | } | |
1999 | ||
2000 | if (new_reloc == BFD_RELOC_UNUSED) | |
2001 | fix = fix_new_exp (frag, where, size, exp, pcrel, r_type); | |
2002 | else | |
2003 | fix = fix_new (frag, where, size, exp->X_add_symbol, exp->X_add_number, | |
2004 | pcrel, new_reloc); | |
4a732032 | 2005 | fix->tc_fix_data.fix_subsy = subsy; |
40b36596 JM |
2006 | fix->tc_fix_data.fix_adda = fix_adda; |
2007 | } | |
2008 | ||
2009 | /* Generate a fix for a constant (.word etc.). Needed to ensure these | |
2010 | go through the error checking in tic6x_fix_new_exp. */ | |
2011 | ||
2012 | void | |
62ebcb5c AM |
2013 | tic6x_cons_fix_new (fragS *frag, int where, int size, expressionS *exp, |
2014 | bfd_reloc_code_real_type r_type) | |
40b36596 | 2015 | { |
40b36596 JM |
2016 | switch (size) |
2017 | { | |
2018 | case 1: | |
2019 | r_type = BFD_RELOC_8; | |
2020 | break; | |
2021 | ||
2022 | case 2: | |
2023 | r_type = BFD_RELOC_16; | |
2024 | break; | |
2025 | ||
2026 | case 4: | |
2027 | r_type = BFD_RELOC_32; | |
2028 | break; | |
2029 | ||
2030 | default: | |
2031 | as_bad (_("no %d-byte relocations available"), size); | |
2032 | return; | |
2033 | } | |
2034 | ||
2035 | tic6x_fix_new_exp (frag, where, size, exp, 0, r_type, FALSE); | |
2036 | } | |
2037 | ||
2038 | /* Initialize target-specific fix data. */ | |
2039 | ||
2040 | void | |
2041 | tic6x_init_fix_data (fixS *fixP) | |
2042 | { | |
2043 | fixP->tc_fix_data.fix_adda = FALSE; | |
4a732032 | 2044 | fixP->tc_fix_data.fix_subsy = NULL; |
40b36596 JM |
2045 | } |
2046 | ||
43bb514a BS |
2047 | /* Return true if the fix can be handled by GAS, false if it must |
2048 | be passed through to the linker. */ | |
2049 | ||
2050 | bfd_boolean | |
2051 | tic6x_fix_adjustable (fixS *fixP) | |
2052 | { | |
2053 | switch (fixP->fx_r_type) | |
2054 | { | |
2055 | /* Adjust_reloc_syms doesn't know about the GOT. */ | |
2056 | case BFD_RELOC_C6000_SBR_GOT_U15_W: | |
2057 | case BFD_RELOC_C6000_SBR_GOT_H16_W: | |
2058 | case BFD_RELOC_C6000_SBR_GOT_L16_W: | |
2fbb87f6 | 2059 | case BFD_RELOC_C6000_EHTYPE: |
43bb514a BS |
2060 | return 0; |
2061 | ||
1bce6bd8 PB |
2062 | case BFD_RELOC_C6000_PREL31: |
2063 | return 0; | |
2064 | ||
4a732032 BS |
2065 | case BFD_RELOC_C6000_PCR_H16: |
2066 | case BFD_RELOC_C6000_PCR_L16: | |
2067 | return 0; | |
3739860c | 2068 | |
43bb514a BS |
2069 | default: |
2070 | return 1; | |
2071 | } | |
2072 | } | |
2073 | ||
40b36596 JM |
2074 | /* Given the fine-grained form of an operand, return the coarse |
2075 | (bit-mask) form. */ | |
2076 | ||
2077 | static unsigned int | |
2078 | tic6x_coarse_operand_form (tic6x_operand_form form) | |
2079 | { | |
2080 | switch (form) | |
2081 | { | |
2082 | case tic6x_operand_asm_const: | |
2083 | case tic6x_operand_link_const: | |
2084 | return TIC6X_OP_EXP; | |
2085 | ||
2086 | case tic6x_operand_reg: | |
2087 | case tic6x_operand_xreg: | |
2088 | case tic6x_operand_dreg: | |
2089 | case tic6x_operand_areg: | |
2090 | case tic6x_operand_retreg: | |
2091 | return TIC6X_OP_REG; | |
2092 | ||
2093 | case tic6x_operand_regpair: | |
2094 | case tic6x_operand_xregpair: | |
2095 | case tic6x_operand_dregpair: | |
2096 | return TIC6X_OP_REGPAIR; | |
2097 | ||
2098 | case tic6x_operand_irp: | |
2099 | return TIC6X_OP_IRP; | |
2100 | ||
2101 | case tic6x_operand_nrp: | |
2102 | return TIC6X_OP_NRP; | |
2103 | ||
2104 | case tic6x_operand_ctrl: | |
2105 | return TIC6X_OP_CTRL; | |
2106 | ||
2107 | case tic6x_operand_mem_short: | |
2108 | case tic6x_operand_mem_long: | |
2109 | case tic6x_operand_mem_deref: | |
2110 | return TIC6X_OP_MEM_NOUNREG; | |
2111 | ||
2112 | case tic6x_operand_mem_ndw: | |
2113 | return TIC6X_OP_MEM_UNREG; | |
2114 | ||
2115 | case tic6x_operand_func_unit: | |
2116 | return TIC6X_OP_FUNC_UNIT; | |
2117 | ||
2118 | default: | |
2119 | abort (); | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | /* How an operand may match or not match a desired form. If different | |
2124 | instruction alternatives fail in different ways, the first failure | |
2125 | in this list determines the diagnostic. */ | |
2126 | typedef enum | |
2127 | { | |
2128 | /* Matches. */ | |
2129 | tic6x_match_matches, | |
2130 | /* Bad coarse form. */ | |
2131 | tic6x_match_coarse, | |
2132 | /* Not constant. */ | |
2133 | tic6x_match_non_const, | |
2134 | /* Register on wrong side. */ | |
2135 | tic6x_match_wrong_side, | |
2136 | /* Not a valid address register. */ | |
2137 | tic6x_match_bad_address, | |
2138 | /* Not a valid return address register. */ | |
2139 | tic6x_match_bad_return, | |
2140 | /* Control register not readable. */ | |
2141 | tic6x_match_ctrl_write_only, | |
2142 | /* Control register not writable. */ | |
2143 | tic6x_match_ctrl_read_only, | |
2144 | /* Not a valid memory reference for this instruction. */ | |
2145 | tic6x_match_bad_mem | |
2146 | } tic6x_operand_match; | |
2147 | ||
2148 | /* Return whether an operand matches the given fine-grained form and | |
2149 | read/write usage, and, if it does not match, how it fails to match. | |
2150 | The main functional unit side is SIDE; the cross-path side is CROSS | |
2151 | (the same as SIDE if a cross path not used); the data side is | |
2152 | DATA_SIDE. */ | |
2153 | static tic6x_operand_match | |
2154 | tic6x_operand_matches_form (const tic6x_operand *op, tic6x_operand_form form, | |
2155 | tic6x_rw rw, unsigned int side, unsigned int cross, | |
2156 | unsigned int data_side) | |
2157 | { | |
2158 | unsigned int coarse = tic6x_coarse_operand_form (form); | |
2159 | ||
2160 | if (coarse != op->form) | |
2161 | return tic6x_match_coarse; | |
2162 | ||
2163 | switch (form) | |
2164 | { | |
2165 | case tic6x_operand_asm_const: | |
2166 | if (op->value.exp.X_op == O_constant) | |
2167 | return tic6x_match_matches; | |
2168 | else | |
2169 | return tic6x_match_non_const; | |
2170 | ||
2171 | case tic6x_operand_link_const: | |
2172 | case tic6x_operand_irp: | |
2173 | case tic6x_operand_nrp: | |
2174 | case tic6x_operand_func_unit: | |
2175 | /* All expressions are link-time constants, although there may | |
2176 | not be relocations to express them in the output file. "irp" | |
2177 | and "nrp" are unique operand values. All parsed functional | |
2178 | unit names are valid. */ | |
2179 | return tic6x_match_matches; | |
2180 | ||
2181 | case tic6x_operand_reg: | |
2182 | case tic6x_operand_regpair: | |
2183 | if (op->value.reg.side == side) | |
2184 | return tic6x_match_matches; | |
2185 | else | |
2186 | return tic6x_match_wrong_side; | |
2187 | ||
2188 | case tic6x_operand_xreg: | |
2189 | case tic6x_operand_xregpair: | |
2190 | if (op->value.reg.side == cross) | |
2191 | return tic6x_match_matches; | |
2192 | else | |
2193 | return tic6x_match_wrong_side; | |
2194 | ||
2195 | case tic6x_operand_dreg: | |
2196 | case tic6x_operand_dregpair: | |
2197 | if (op->value.reg.side == data_side) | |
2198 | return tic6x_match_matches; | |
2199 | else | |
2200 | return tic6x_match_wrong_side; | |
2201 | ||
2202 | case tic6x_operand_areg: | |
2203 | if (op->value.reg.side != cross) | |
2204 | return tic6x_match_wrong_side; | |
2205 | else if (op->value.reg.side == 2 | |
2206 | && (op->value.reg.num == 14 || op->value.reg.num == 15)) | |
2207 | return tic6x_match_matches; | |
2208 | else | |
2209 | return tic6x_match_bad_address; | |
2210 | ||
2211 | case tic6x_operand_retreg: | |
2212 | if (op->value.reg.side != side) | |
2213 | return tic6x_match_wrong_side; | |
2214 | else if (op->value.reg.num != 3) | |
2215 | return tic6x_match_bad_return; | |
2216 | else | |
2217 | return tic6x_match_matches; | |
2218 | ||
2219 | case tic6x_operand_ctrl: | |
2220 | switch (rw) | |
2221 | { | |
2222 | case tic6x_rw_read: | |
2223 | if (tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_read | |
2224 | || tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_read_write) | |
2225 | return tic6x_match_matches; | |
2226 | else | |
2227 | return tic6x_match_ctrl_write_only; | |
2228 | ||
2229 | case tic6x_rw_write: | |
2230 | if (tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_write | |
2231 | || tic6x_ctrl_table[op->value.ctrl].rw == tic6x_rw_read_write) | |
2232 | return tic6x_match_matches; | |
2233 | else | |
2234 | return tic6x_match_ctrl_read_only; | |
2235 | ||
2236 | default: | |
2237 | abort (); | |
2238 | } | |
2239 | ||
2240 | case tic6x_operand_mem_deref: | |
2241 | if (op->value.mem.mod != tic6x_mem_mod_none) | |
2242 | return tic6x_match_bad_mem; | |
2243 | else if (op->value.mem.scaled != tic6x_offset_none) | |
2244 | abort (); | |
2245 | else if (op->value.mem.base_reg.side != side) | |
2246 | return tic6x_match_bad_mem; | |
2247 | else | |
2248 | return tic6x_match_matches; | |
2249 | ||
2250 | case tic6x_operand_mem_short: | |
2251 | case tic6x_operand_mem_ndw: | |
2252 | if (op->value.mem.base_reg.side != side) | |
2253 | return tic6x_match_bad_mem; | |
2254 | if (op->value.mem.mod == tic6x_mem_mod_none) | |
2255 | { | |
2256 | if (op->value.mem.scaled != tic6x_offset_none) | |
2257 | abort (); | |
2258 | return tic6x_match_matches; | |
2259 | } | |
2260 | if (op->value.mem.scaled == tic6x_offset_none) | |
2261 | { | |
2262 | if (op->value.mem.mod == tic6x_mem_mod_plus | |
2263 | || op->value.mem.mod == tic6x_mem_mod_minus) | |
2264 | abort (); | |
2265 | return tic6x_match_matches; | |
2266 | } | |
2267 | if (op->value.mem.offset_is_reg) | |
2268 | { | |
2269 | if (op->value.mem.scaled == tic6x_offset_unscaled | |
2270 | && form != tic6x_operand_mem_ndw) | |
2271 | abort (); | |
2272 | if (op->value.mem.offset.reg.side == side) | |
2273 | return tic6x_match_matches; | |
2274 | else | |
2275 | return tic6x_match_bad_mem; | |
2276 | } | |
2277 | else | |
2278 | { | |
2279 | if (op->value.mem.offset.exp.X_op == O_constant) | |
2280 | return tic6x_match_matches; | |
2281 | else | |
2282 | return tic6x_match_bad_mem; | |
2283 | } | |
2284 | ||
2285 | case tic6x_operand_mem_long: | |
2286 | if (op->value.mem.base_reg.side == 2 | |
2287 | && (op->value.mem.base_reg.num == 14 | |
2288 | || op->value.mem.base_reg.num == 15)) | |
2289 | { | |
2290 | switch (op->value.mem.mod) | |
2291 | { | |
2292 | case tic6x_mem_mod_none: | |
2293 | if (op->value.mem.scaled != tic6x_offset_none) | |
2294 | abort (); | |
2295 | return tic6x_match_matches; | |
2296 | ||
2297 | case tic6x_mem_mod_plus: | |
2298 | if (op->value.mem.scaled == tic6x_offset_none) | |
2299 | abort (); | |
2300 | if (op->value.mem.offset_is_reg) | |
2301 | return tic6x_match_bad_mem; | |
2302 | else if (op->value.mem.scaled == tic6x_offset_scaled | |
2303 | && op->value.mem.offset.exp.X_op != O_constant) | |
2304 | return tic6x_match_bad_mem; | |
2305 | else | |
2306 | return tic6x_match_matches; | |
2307 | ||
2308 | case tic6x_mem_mod_minus: | |
2309 | case tic6x_mem_mod_preinc: | |
2310 | case tic6x_mem_mod_predec: | |
2311 | case tic6x_mem_mod_postinc: | |
2312 | case tic6x_mem_mod_postdec: | |
2313 | return tic6x_match_bad_mem; | |
2314 | ||
2315 | default: | |
2316 | abort (); | |
2317 | } | |
2318 | ||
2319 | } | |
2320 | else | |
2321 | return tic6x_match_bad_mem; | |
2322 | ||
2323 | default: | |
2324 | abort (); | |
2325 | } | |
2326 | } | |
2327 | ||
2328 | /* Return the number of bits shift used with DP-relative coding method | |
2329 | CODING. */ | |
2330 | ||
2331 | static unsigned int | |
2332 | tic6x_dpr_shift (tic6x_coding_method coding) | |
2333 | { | |
2334 | switch (coding) | |
2335 | { | |
2336 | case tic6x_coding_ulcst_dpr_byte: | |
2337 | return 0; | |
2338 | ||
2339 | case tic6x_coding_ulcst_dpr_half: | |
2340 | return 1; | |
2341 | ||
2342 | case tic6x_coding_ulcst_dpr_word: | |
2343 | return 2; | |
2344 | ||
2345 | default: | |
2346 | abort (); | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | /* Return the relocation used with DP-relative coding method | |
2351 | CODING. */ | |
2352 | ||
2353 | static bfd_reloc_code_real_type | |
2354 | tic6x_dpr_reloc (tic6x_coding_method coding) | |
2355 | { | |
2356 | switch (coding) | |
2357 | { | |
2358 | case tic6x_coding_ulcst_dpr_byte: | |
2359 | return BFD_RELOC_C6000_SBR_U15_B; | |
2360 | ||
2361 | case tic6x_coding_ulcst_dpr_half: | |
2362 | return BFD_RELOC_C6000_SBR_U15_H; | |
2363 | ||
2364 | case tic6x_coding_ulcst_dpr_word: | |
2365 | return BFD_RELOC_C6000_SBR_U15_W; | |
2366 | ||
2367 | default: | |
2368 | abort (); | |
2369 | } | |
2370 | } | |
2371 | ||
2372 | /* Given a memory reference *MEM_REF as originally parsed, fill in | |
2373 | defaults for missing offsets. */ | |
2374 | ||
2375 | static void | |
2376 | tic6x_default_mem_ref (tic6x_mem_ref *mem_ref) | |
2377 | { | |
2378 | switch (mem_ref->mod) | |
2379 | { | |
2380 | case tic6x_mem_mod_none: | |
2381 | if (mem_ref->scaled != tic6x_offset_none) | |
2382 | abort (); | |
2383 | mem_ref->mod = tic6x_mem_mod_plus; | |
2384 | mem_ref->scaled = tic6x_offset_unscaled; | |
2385 | mem_ref->offset_is_reg = FALSE; | |
2386 | memset (&mem_ref->offset.exp, 0, sizeof mem_ref->offset.exp); | |
2387 | mem_ref->offset.exp.X_op = O_constant; | |
2388 | mem_ref->offset.exp.X_add_number = 0; | |
2389 | mem_ref->offset.exp.X_unsigned = 0; | |
2390 | break; | |
2391 | ||
2392 | case tic6x_mem_mod_plus: | |
2393 | case tic6x_mem_mod_minus: | |
2394 | if (mem_ref->scaled == tic6x_offset_none) | |
2395 | abort (); | |
2396 | break; | |
2397 | ||
2398 | case tic6x_mem_mod_preinc: | |
2399 | case tic6x_mem_mod_predec: | |
2400 | case tic6x_mem_mod_postinc: | |
2401 | case tic6x_mem_mod_postdec: | |
2402 | if (mem_ref->scaled != tic6x_offset_none) | |
2403 | break; | |
2404 | mem_ref->scaled = tic6x_offset_scaled; | |
2405 | mem_ref->offset_is_reg = FALSE; | |
2406 | memset (&mem_ref->offset.exp, 0, sizeof mem_ref->offset.exp); | |
2407 | mem_ref->offset.exp.X_op = O_constant; | |
2408 | mem_ref->offset.exp.X_add_number = 1; | |
2409 | mem_ref->offset.exp.X_unsigned = 0; | |
2410 | break; | |
2411 | ||
2412 | default: | |
2413 | abort (); | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | /* Return the encoding in the 8-bit field of an SPMASK or SPMASKR | |
2418 | instruction of the specified UNIT, side SIDE. */ | |
2419 | ||
2420 | static unsigned int | |
2421 | tic6x_encode_spmask (tic6x_func_unit_base unit, unsigned int side) | |
2422 | { | |
2423 | switch (unit) | |
2424 | { | |
2425 | case tic6x_func_unit_l: | |
2426 | return 1 << (side - 1); | |
2427 | ||
2428 | case tic6x_func_unit_s: | |
2429 | return 1 << (side + 1); | |
2430 | ||
2431 | case tic6x_func_unit_d: | |
2432 | return 1 << (side + 3); | |
2433 | ||
2434 | case tic6x_func_unit_m: | |
2435 | return 1 << (side + 5); | |
2436 | ||
2437 | default: | |
2438 | abort (); | |
2439 | } | |
2440 | } | |
2441 | ||
2442 | /* Try to encode the instruction with opcode number ID and operands | |
2443 | OPERANDS (number NUM_OPERANDS), creg value THIS_LINE_CREG and z | |
2444 | value THIS_LINE_Z; FUNC_UNIT_SIDE, FUNC_UNIT_CROSS and | |
2445 | FUNC_UNIT_DATA_SIDE describe the functional unit specification; | |
2446 | SPLOOP_II is the ii value from the previous SPLOOP-family | |
2447 | instruction, or 0 if not in such a loop; the only possible problems | |
2448 | are operands being out of range (they already match the | |
2449 | fine-grained form), and inappropriate predication. If this | |
2450 | succeeds, return the encoding and set *OK to TRUE; otherwise return | |
2451 | 0 and set *OK to FALSE. If a fix is needed, set *FIX_NEEDED to | |
2452 | true and fill in *FIX_EXP, *FIX_PCREL, *FX_R_TYPE and *FIX_ADDA. | |
2453 | Print error messages for failure if PRINT_ERRORS is TRUE; the | |
2454 | opcode starts at STR and has length OPC_LEN. */ | |
2455 | ||
2456 | static unsigned int | |
2457 | tic6x_try_encode (tic6x_opcode_id id, tic6x_operand *operands, | |
2458 | unsigned int num_operands, unsigned int this_line_creg, | |
2459 | unsigned int this_line_z, unsigned int func_unit_side, | |
2460 | unsigned int func_unit_cross, | |
2461 | unsigned int func_unit_data_side, int sploop_ii, | |
2462 | expressionS **fix_exp, int *fix_pcrel, | |
2463 | bfd_reloc_code_real_type *fx_r_type, bfd_boolean *fix_adda, | |
2464 | bfd_boolean *fix_needed, bfd_boolean *ok, | |
2465 | bfd_boolean print_errors, char *str, int opc_len) | |
2466 | { | |
2467 | const tic6x_opcode *opct; | |
2468 | const tic6x_insn_format *fmt; | |
2469 | unsigned int opcode_value; | |
2470 | unsigned int fld; | |
2471 | ||
2472 | opct = &tic6x_opcode_table[id]; | |
2473 | fmt = &tic6x_insn_format_table[opct->format]; | |
2474 | opcode_value = fmt->cst_bits; | |
2475 | ||
2476 | for (fld = 0; fld < opct->num_fixed_fields; fld++) | |
2477 | { | |
2478 | if (opct->fixed_fields[fld].min_val == opct->fixed_fields[fld].max_val) | |
2479 | { | |
2480 | const tic6x_insn_field *fldd; | |
2481 | fldd = tic6x_field_from_fmt (fmt, opct->fixed_fields[fld].field_id); | |
2482 | if (fldd == NULL) | |
2483 | abort (); | |
51dcdd4d | 2484 | opcode_value |= opct->fixed_fields[fld].min_val << fldd->bitfields[0].low_pos; |
40b36596 JM |
2485 | } |
2486 | } | |
2487 | ||
2488 | for (fld = 0; fld < opct->num_variable_fields; fld++) | |
2489 | { | |
2490 | const tic6x_insn_field *fldd; | |
2491 | unsigned int value; | |
2492 | unsigned int opno; | |
2493 | unsigned int ffld; | |
2494 | offsetT sign_value; | |
2495 | unsigned int bits; | |
2496 | unsigned int fcyc_bits; | |
2497 | expressionS *expp; | |
2498 | expressionS ucexp; | |
2499 | tic6x_mem_ref mem; | |
2500 | ||
2501 | fldd = tic6x_field_from_fmt (fmt, opct->variable_fields[fld].field_id); | |
2502 | if (fldd == NULL) | |
2503 | abort (); | |
2504 | opno = opct->variable_fields[fld].operand_num; | |
2505 | switch (opct->variable_fields[fld].coding_method) | |
2506 | { | |
2507 | case tic6x_coding_ucst: | |
2508 | if (operands[opno].form != TIC6X_OP_EXP) | |
2509 | abort (); | |
2510 | if (operands[opno].value.exp.X_op != O_constant) | |
2511 | abort (); | |
2512 | ucexp = operands[opno].value.exp; | |
2513 | unsigned_constant: | |
2514 | if (ucexp.X_add_number < 0 | |
51dcdd4d | 2515 | || ucexp.X_add_number >= (1 << fldd->bitfields[0].width)) |
40b36596 JM |
2516 | { |
2517 | if (print_errors) | |
2518 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2519 | opc_len, str); | |
2520 | *ok = FALSE; | |
2521 | return 0; | |
2522 | } | |
2523 | value = ucexp.X_add_number; | |
2524 | break; | |
2525 | ||
2526 | case tic6x_coding_scst: | |
2527 | if (operands[opno].form != TIC6X_OP_EXP) | |
2528 | abort (); | |
2529 | if (operands[opno].value.exp.X_op != O_constant) | |
2530 | { | |
2531 | value = 0; | |
2532 | /* Opcode table should not permit non-constants without | |
2533 | a known relocation for them. */ | |
51dcdd4d | 2534 | if (fldd->bitfields[0].low_pos != 7 || fldd->bitfields[0].width != 16) |
40b36596 JM |
2535 | abort (); |
2536 | *fix_needed = TRUE; | |
2537 | *fix_exp = &operands[opno].value.exp; | |
2538 | *fix_pcrel = 0; | |
2539 | *fx_r_type = BFD_RELOC_C6000_ABS_S16; | |
2540 | *fix_adda = FALSE; | |
2541 | break; | |
2542 | } | |
2543 | sign_value = SEXT (operands[opno].value.exp.X_add_number); | |
2544 | signed_constant: | |
51dcdd4d NC |
2545 | if (sign_value < -(1 << (fldd->bitfields[0].width - 1)) |
2546 | || (sign_value >= (1 << (fldd->bitfields[0].width - 1)))) | |
40b36596 JM |
2547 | { |
2548 | if (print_errors) | |
2549 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2550 | opc_len, str); | |
2551 | *ok = FALSE; | |
2552 | return 0; | |
2553 | } | |
51dcdd4d NC |
2554 | value = sign_value + (1 << (fldd->bitfields[0].width - 1)); |
2555 | value ^= (1 << (fldd->bitfields[0].width - 1)); | |
40b36596 JM |
2556 | break; |
2557 | ||
2558 | case tic6x_coding_ucst_minus_one: | |
2559 | if (operands[opno].form != TIC6X_OP_EXP) | |
2560 | abort (); | |
2561 | if (operands[opno].value.exp.X_op != O_constant) | |
2562 | abort (); | |
2563 | if (operands[opno].value.exp.X_add_number <= 0 | |
51dcdd4d | 2564 | || operands[opno].value.exp.X_add_number > (1 << fldd->bitfields[0].width)) |
40b36596 JM |
2565 | { |
2566 | if (print_errors) | |
2567 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2568 | opc_len, str); | |
2569 | *ok = FALSE; | |
2570 | return 0; | |
2571 | } | |
2572 | value = operands[opno].value.exp.X_add_number - 1; | |
2573 | break; | |
2574 | ||
2575 | case tic6x_coding_scst_negate: | |
2576 | if (operands[opno].form != TIC6X_OP_EXP) | |
2577 | abort (); | |
2578 | if (operands[opno].value.exp.X_op != O_constant) | |
2579 | abort (); | |
2580 | sign_value = SEXT (-operands[opno].value.exp.X_add_number); | |
2581 | goto signed_constant; | |
2582 | ||
2583 | case tic6x_coding_ulcst_dpr_byte: | |
2584 | case tic6x_coding_ulcst_dpr_half: | |
2585 | case tic6x_coding_ulcst_dpr_word: | |
2586 | bits = tic6x_dpr_shift (opct->variable_fields[fld].coding_method); | |
2587 | switch (operands[opno].form) | |
2588 | { | |
2589 | case TIC6X_OP_EXP: | |
2590 | if (operands[opno].value.exp.X_op == O_constant) | |
2591 | { | |
2592 | ucexp = operands[opno].value.exp; | |
2593 | goto unsigned_constant; | |
2594 | } | |
2595 | expp = &operands[opno].value.exp; | |
2596 | break; | |
2597 | ||
2598 | case TIC6X_OP_MEM_NOUNREG: | |
2599 | mem = operands[opno].value.mem; | |
2600 | tic6x_default_mem_ref (&mem); | |
2601 | if (mem.offset_is_reg) | |
2602 | abort (); | |
2603 | if (mem.offset.exp.X_op == O_constant) | |
2604 | { | |
2605 | ucexp = mem.offset.exp; | |
2606 | if (mem.scaled == tic6x_offset_unscaled) | |
2607 | { | |
2608 | if (ucexp.X_add_number & ((1 << bits) - 1)) | |
2609 | { | |
2610 | if (print_errors) | |
2611 | as_bad (_("offset in operand %u of '%.*s' not " | |
2612 | "divisible by %u"), opno + 1, opc_len, | |
2613 | str, 1u << bits); | |
2614 | *ok = FALSE; | |
2615 | return 0; | |
2616 | } | |
2617 | ucexp.X_add_number >>= bits; | |
2618 | } | |
2619 | goto unsigned_constant; | |
2620 | } | |
2621 | if (mem.scaled != tic6x_offset_unscaled) | |
2622 | abort (); | |
2623 | if (operands[opno].value.mem.mod == tic6x_mem_mod_none | |
2624 | || operands[opno].value.mem.scaled != tic6x_offset_unscaled | |
2625 | || operands[opno].value.mem.offset_is_reg) | |
2626 | abort (); | |
2627 | expp = &operands[opno].value.mem.offset.exp; | |
2628 | break; | |
2629 | ||
2630 | default: | |
2631 | abort (); | |
2632 | } | |
2633 | value = 0; | |
2634 | /* Opcode table should not use this encoding without a known | |
2635 | relocation. */ | |
51dcdd4d | 2636 | if (fldd->bitfields[0].low_pos != 8 || fldd->bitfields[0].width != 15) |
40b36596 JM |
2637 | abort (); |
2638 | /* We do not check for offset divisibility here; such a | |
2639 | check is not needed at this point to encode the value, | |
2640 | and if there is eventually a problem it will be detected | |
2641 | either in md_apply_fix or at link time. */ | |
2642 | *fix_needed = TRUE; | |
2643 | *fix_exp = expp; | |
2644 | *fix_pcrel = 0; | |
2645 | *fx_r_type | |
2646 | = tic6x_dpr_reloc (opct->variable_fields[fld].coding_method); | |
2647 | if (operands[opno].form == TIC6X_OP_EXP) | |
2648 | *fix_adda = TRUE; | |
2649 | else | |
2650 | *fix_adda = FALSE; | |
2651 | break; | |
2652 | ||
2653 | case tic6x_coding_lcst_low16: | |
2654 | if (operands[opno].form != TIC6X_OP_EXP) | |
2655 | abort (); | |
2656 | if (operands[opno].value.exp.X_op == O_constant) | |
2657 | value = operands[opno].value.exp.X_add_number & 0xffff; | |
2658 | else | |
2659 | { | |
2660 | value = 0; | |
2661 | /* Opcode table should not use this encoding without a | |
2662 | known relocation. */ | |
51dcdd4d | 2663 | if (fldd->bitfields[0].low_pos != 7 || fldd->bitfields[0].width != 16) |
40b36596 JM |
2664 | abort (); |
2665 | *fix_needed = TRUE; | |
2666 | *fix_exp = &operands[opno].value.exp; | |
2667 | *fix_pcrel = 0; | |
2668 | *fx_r_type = BFD_RELOC_C6000_ABS_L16; | |
2669 | *fix_adda = FALSE; | |
2670 | } | |
2671 | break; | |
2672 | ||
2673 | case tic6x_coding_lcst_high16: | |
2674 | if (operands[opno].form != TIC6X_OP_EXP) | |
2675 | abort (); | |
2676 | if (operands[opno].value.exp.X_op == O_constant) | |
2677 | value = (operands[opno].value.exp.X_add_number >> 16) & 0xffff; | |
2678 | else | |
2679 | { | |
2680 | value = 0; | |
2681 | /* Opcode table should not use this encoding without a | |
2682 | known relocation. */ | |
51dcdd4d | 2683 | if (fldd->bitfields[0].low_pos != 7 || fldd->bitfields[0].width != 16) |
40b36596 JM |
2684 | abort (); |
2685 | *fix_needed = TRUE; | |
2686 | *fix_exp = &operands[opno].value.exp; | |
2687 | *fix_pcrel = 0; | |
2688 | *fx_r_type = BFD_RELOC_C6000_ABS_H16; | |
2689 | *fix_adda = FALSE; | |
2690 | } | |
2691 | break; | |
2692 | ||
2693 | case tic6x_coding_pcrel: | |
2694 | case tic6x_coding_pcrel_half: | |
2695 | if (operands[opno].form != TIC6X_OP_EXP) | |
2696 | abort (); | |
2697 | value = 0; | |
2698 | *fix_needed = TRUE; | |
2699 | *fix_exp = &operands[opno].value.exp; | |
2700 | *fix_pcrel = 1; | |
51dcdd4d | 2701 | if (fldd->bitfields[0].low_pos == 7 && fldd->bitfields[0].width == 21) |
40b36596 | 2702 | *fx_r_type = BFD_RELOC_C6000_PCR_S21; |
51dcdd4d | 2703 | else if (fldd->bitfields[0].low_pos == 16 && fldd->bitfields[0].width == 12) |
40b36596 | 2704 | *fx_r_type = BFD_RELOC_C6000_PCR_S12; |
51dcdd4d | 2705 | else if (fldd->bitfields[0].low_pos == 13 && fldd->bitfields[0].width == 10) |
40b36596 | 2706 | *fx_r_type = BFD_RELOC_C6000_PCR_S10; |
51dcdd4d | 2707 | else if (fldd->bitfields[0].low_pos == 16 && fldd->bitfields[0].width == 7) |
40b36596 JM |
2708 | *fx_r_type = BFD_RELOC_C6000_PCR_S7; |
2709 | else | |
2710 | /* Opcode table should not use this encoding without a | |
2711 | known relocation. */ | |
2712 | abort (); | |
2713 | *fix_adda = FALSE; | |
2714 | break; | |
2715 | ||
795b8e6b NC |
2716 | case tic6x_coding_regpair_lsb: |
2717 | switch (operands[opno].form) | |
2718 | { | |
2719 | case TIC6X_OP_REGPAIR: | |
2720 | value = operands[opno].value.reg.num; | |
2721 | break; | |
2722 | ||
2723 | default: | |
2724 | abort (); | |
2725 | } | |
2726 | break; | |
2727 | ||
2728 | case tic6x_coding_regpair_msb: | |
2729 | switch (operands[opno].form) | |
2730 | { | |
2731 | case TIC6X_OP_REGPAIR: | |
2732 | value = operands[opno].value.reg.num + 1; | |
2733 | break; | |
2734 | ||
2735 | default: | |
2736 | abort (); | |
2737 | } | |
2738 | break; | |
2739 | ||
40b36596 JM |
2740 | case tic6x_coding_reg: |
2741 | switch (operands[opno].form) | |
2742 | { | |
2743 | case TIC6X_OP_REG: | |
2744 | case TIC6X_OP_REGPAIR: | |
2745 | value = operands[opno].value.reg.num; | |
2746 | break; | |
2747 | ||
2748 | case TIC6X_OP_MEM_NOUNREG: | |
2749 | case TIC6X_OP_MEM_UNREG: | |
2750 | value = operands[opno].value.mem.base_reg.num; | |
2751 | break; | |
2752 | ||
2753 | default: | |
2754 | abort (); | |
2755 | } | |
2756 | break; | |
2757 | ||
2758 | case tic6x_coding_areg: | |
2759 | switch (operands[opno].form) | |
2760 | { | |
2761 | case TIC6X_OP_REG: | |
2762 | value = (operands[opno].value.reg.num == 15 ? 1 : 0); | |
2763 | break; | |
2764 | ||
2765 | case TIC6X_OP_MEM_NOUNREG: | |
2766 | value = (operands[opno].value.mem.base_reg.num == 15 ? 1 : 0); | |
2767 | break; | |
2768 | ||
2769 | default: | |
2770 | abort (); | |
2771 | } | |
2772 | break; | |
2773 | ||
2774 | case tic6x_coding_crlo: | |
2775 | if (operands[opno].form != TIC6X_OP_CTRL) | |
2776 | abort (); | |
2777 | value = tic6x_ctrl_table[operands[opno].value.ctrl].crlo; | |
2778 | break; | |
2779 | ||
2780 | case tic6x_coding_crhi: | |
2781 | if (operands[opno].form != TIC6X_OP_CTRL) | |
2782 | abort (); | |
2783 | value = 0; | |
2784 | break; | |
2785 | ||
2786 | case tic6x_coding_reg_shift: | |
2787 | if (operands[opno].form != TIC6X_OP_REGPAIR) | |
2788 | abort (); | |
2789 | value = operands[opno].value.reg.num >> 1; | |
2790 | break; | |
2791 | ||
2792 | case tic6x_coding_mem_offset: | |
2793 | if (operands[opno].form != TIC6X_OP_MEM_NOUNREG) | |
2794 | abort (); | |
2795 | mem = operands[opno].value.mem; | |
2796 | tic6x_default_mem_ref (&mem); | |
2797 | if (mem.offset_is_reg) | |
2798 | { | |
2799 | if (mem.scaled != tic6x_offset_scaled) | |
2800 | abort (); | |
2801 | value = mem.offset.reg.num; | |
2802 | } | |
2803 | else | |
2804 | { | |
2805 | int scale; | |
2806 | ||
2807 | if (mem.offset.exp.X_op != O_constant) | |
2808 | abort (); | |
2809 | switch (mem.scaled) | |
2810 | { | |
2811 | case tic6x_offset_scaled: | |
2812 | scale = 1; | |
2813 | break; | |
2814 | ||
2815 | case tic6x_offset_unscaled: | |
2816 | scale = opct->operand_info[opno].size; | |
2817 | if (scale != 1 && scale != 2 && scale != 4 && scale != 8) | |
2818 | abort (); | |
2819 | break; | |
2820 | ||
2821 | default: | |
2822 | abort (); | |
2823 | } | |
2824 | if (mem.offset.exp.X_add_number < 0 | |
51dcdd4d | 2825 | || mem.offset.exp.X_add_number >= (1 << fldd->bitfields[0].width) * scale) |
40b36596 JM |
2826 | { |
2827 | if (print_errors) | |
2828 | as_bad (_("offset in operand %u of '%.*s' out of range"), | |
2829 | opno + 1, opc_len, str); | |
2830 | *ok = FALSE; | |
2831 | return 0; | |
2832 | } | |
2833 | if (mem.offset.exp.X_add_number % scale) | |
2834 | { | |
2835 | if (print_errors) | |
2836 | as_bad (_("offset in operand %u of '%.*s' not " | |
2837 | "divisible by %u"), | |
2838 | opno + 1, opc_len, str, scale); | |
2839 | *ok = FALSE; | |
2840 | return 0; | |
2841 | } | |
2842 | value = mem.offset.exp.X_add_number / scale; | |
2843 | } | |
2844 | break; | |
2845 | ||
2846 | case tic6x_coding_mem_offset_noscale: | |
2847 | if (operands[opno].form != TIC6X_OP_MEM_UNREG) | |
2848 | abort (); | |
2849 | mem = operands[opno].value.mem; | |
2850 | tic6x_default_mem_ref (&mem); | |
2851 | if (mem.offset_is_reg) | |
2852 | value = mem.offset.reg.num; | |
2853 | else | |
2854 | { | |
2855 | if (mem.offset.exp.X_op != O_constant) | |
2856 | abort (); | |
2857 | if (mem.offset.exp.X_add_number < 0 | |
51dcdd4d | 2858 | || mem.offset.exp.X_add_number >= (1 << fldd->bitfields[0].width)) |
40b36596 JM |
2859 | { |
2860 | if (print_errors) | |
2861 | as_bad (_("offset in operand %u of '%.*s' out of range"), | |
2862 | opno + 1, opc_len, str); | |
2863 | *ok = FALSE; | |
2864 | return 0; | |
2865 | } | |
2866 | value = mem.offset.exp.X_add_number; | |
2867 | } | |
2868 | break; | |
2869 | ||
2870 | case tic6x_coding_mem_mode: | |
2871 | if (operands[opno].form != TIC6X_OP_MEM_NOUNREG | |
2872 | && operands[opno].form != TIC6X_OP_MEM_UNREG) | |
2873 | abort (); | |
2874 | mem = operands[opno].value.mem; | |
2875 | tic6x_default_mem_ref (&mem); | |
2876 | switch (mem.mod) | |
2877 | { | |
2878 | case tic6x_mem_mod_plus: | |
2879 | value = 1; | |
2880 | break; | |
2881 | ||
2882 | case tic6x_mem_mod_minus: | |
2883 | value = 0; | |
2884 | break; | |
2885 | ||
2886 | case tic6x_mem_mod_preinc: | |
2887 | value = 9; | |
2888 | break; | |
2889 | ||
2890 | case tic6x_mem_mod_predec: | |
2891 | value = 8; | |
2892 | break; | |
2893 | ||
2894 | case tic6x_mem_mod_postinc: | |
2895 | value = 11; | |
2896 | break; | |
2897 | ||
2898 | case tic6x_mem_mod_postdec: | |
2899 | value = 10; | |
2900 | break; | |
2901 | ||
2902 | default: | |
2903 | abort (); | |
2904 | } | |
2905 | value += (mem.offset_is_reg ? 4 : 0); | |
2906 | break; | |
2907 | ||
2908 | case tic6x_coding_scaled: | |
2909 | if (operands[opno].form != TIC6X_OP_MEM_UNREG) | |
2910 | abort (); | |
2911 | mem = operands[opno].value.mem; | |
2912 | tic6x_default_mem_ref (&mem); | |
2913 | switch (mem.scaled) | |
2914 | { | |
2915 | case tic6x_offset_unscaled: | |
2916 | value = 0; | |
2917 | break; | |
2918 | ||
2919 | case tic6x_offset_scaled: | |
2920 | value = 1; | |
2921 | break; | |
2922 | ||
2923 | default: | |
2924 | abort (); | |
2925 | } | |
2926 | break; | |
2927 | ||
2928 | case tic6x_coding_spmask: | |
2929 | /* The position of such a field is hardcoded in the handling | |
2930 | of "||^". */ | |
51dcdd4d | 2931 | if (fldd->bitfields[0].low_pos != 18) |
40b36596 JM |
2932 | abort (); |
2933 | value = 0; | |
2934 | for (opno = 0; opno < num_operands; opno++) | |
2935 | { | |
2936 | unsigned int v; | |
2937 | ||
2938 | v = tic6x_encode_spmask (operands[opno].value.func_unit.base, | |
2939 | operands[opno].value.func_unit.side); | |
2940 | if (value & v) | |
2941 | { | |
2942 | if (print_errors) | |
2943 | as_bad (_("functional unit already masked for operand " | |
2944 | "%u of '%.*s'"), opno + 1, opc_len, str); | |
2945 | *ok = FALSE; | |
2946 | return 0; | |
2947 | } | |
2948 | value |= v; | |
2949 | } | |
2950 | break; | |
2951 | ||
2952 | case tic6x_coding_reg_unused: | |
2953 | /* This is a placeholder; correct handling goes along with | |
2954 | resource constraint checks. */ | |
2955 | value = 0; | |
2956 | break; | |
2957 | ||
2958 | case tic6x_coding_fstg: | |
2959 | case tic6x_coding_fcyc: | |
2960 | if (operands[opno].form != TIC6X_OP_EXP) | |
2961 | abort (); | |
2962 | if (operands[opno].value.exp.X_op != O_constant) | |
2963 | abort (); | |
2964 | if (!sploop_ii) | |
2965 | { | |
2966 | if (print_errors) | |
2967 | as_bad (_("'%.*s' instruction not in a software " | |
2968 | "pipelined loop"), | |
2969 | opc_len, str); | |
2970 | *ok = FALSE; | |
2971 | return 0; | |
2972 | } | |
2973 | ||
2974 | if (sploop_ii <= 1) | |
2975 | fcyc_bits = 0; | |
2976 | else if (sploop_ii <= 2) | |
2977 | fcyc_bits = 1; | |
2978 | else if (sploop_ii <= 4) | |
2979 | fcyc_bits = 2; | |
2980 | else if (sploop_ii <= 8) | |
2981 | fcyc_bits = 3; | |
2982 | else if (sploop_ii <= 14) | |
2983 | fcyc_bits = 4; | |
2984 | else | |
2985 | abort (); | |
51dcdd4d | 2986 | if (fcyc_bits > fldd->bitfields[0].width) |
40b36596 JM |
2987 | abort (); |
2988 | ||
2989 | if (opct->variable_fields[fld].coding_method == tic6x_coding_fstg) | |
2990 | { | |
5d4c71e1 | 2991 | int i, t; |
40b36596 JM |
2992 | if (operands[opno].value.exp.X_add_number < 0 |
2993 | || (operands[opno].value.exp.X_add_number | |
51dcdd4d | 2994 | >= (1 << (fldd->bitfields[0].width - fcyc_bits)))) |
40b36596 JM |
2995 | { |
2996 | if (print_errors) | |
2997 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
2998 | opc_len, str); | |
2999 | *ok = FALSE; | |
3000 | return 0; | |
3001 | } | |
5d4c71e1 | 3002 | value = operands[opno].value.exp.X_add_number; |
51dcdd4d | 3003 | for (t = 0, i = fcyc_bits; i < fldd->bitfields[0].width; i++) |
5d4c71e1 BS |
3004 | { |
3005 | t = (t << 1) | (value & 1); | |
3006 | value >>= 1; | |
3007 | } | |
3008 | value = t << fcyc_bits; | |
40b36596 JM |
3009 | } |
3010 | else | |
3011 | { | |
3012 | if (operands[opno].value.exp.X_add_number < 0 | |
3013 | || (operands[opno].value.exp.X_add_number >= sploop_ii)) | |
3014 | { | |
3015 | if (print_errors) | |
3016 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
3017 | opc_len, str); | |
3018 | *ok = FALSE; | |
3019 | return 0; | |
3020 | } | |
3021 | value = operands[opno].value.exp.X_add_number; | |
3022 | } | |
3023 | break; | |
3024 | ||
3025 | case tic6x_coding_fu: | |
3026 | value = func_unit_side == 2 ? 1 : 0; | |
3027 | break; | |
3028 | ||
3029 | case tic6x_coding_data_fu: | |
3030 | value = func_unit_data_side == 2 ? 1 : 0; | |
3031 | break; | |
3032 | ||
3033 | case tic6x_coding_xpath: | |
3034 | value = func_unit_cross; | |
3035 | break; | |
3036 | ||
3037 | default: | |
3038 | abort (); | |
3039 | } | |
3040 | ||
3041 | for (ffld = 0; ffld < opct->num_fixed_fields; ffld++) | |
3042 | if ((opct->fixed_fields[ffld].field_id | |
3043 | == opct->variable_fields[fld].field_id) | |
3044 | && (value < opct->fixed_fields[ffld].min_val | |
3045 | || value > opct->fixed_fields[ffld].max_val)) | |
3046 | { | |
3047 | if (print_errors) | |
3048 | as_bad (_("operand %u of '%.*s' out of range"), opno + 1, | |
3049 | opc_len, str); | |
3050 | *ok = FALSE; | |
3051 | return 0; | |
3052 | } | |
3053 | ||
51dcdd4d | 3054 | opcode_value |= value << fldd->bitfields[0].low_pos; |
40b36596 JM |
3055 | } |
3056 | ||
3057 | if (this_line_creg) | |
3058 | { | |
3059 | const tic6x_insn_field *creg; | |
3060 | const tic6x_insn_field *z; | |
3061 | ||
3062 | creg = tic6x_field_from_fmt (fmt, tic6x_field_creg); | |
3063 | if (creg == NULL) | |
3064 | { | |
3065 | if (print_errors) | |
3066 | as_bad (_("instruction '%.*s' cannot be predicated"), | |
3067 | opc_len, str); | |
3068 | *ok = FALSE; | |
3069 | return 0; | |
3070 | } | |
3071 | z = tic6x_field_from_fmt (fmt, tic6x_field_z); | |
3072 | /* If there is a creg field, there must be a z field; otherwise | |
3073 | there is an error in the format table. */ | |
3074 | if (z == NULL) | |
3075 | abort (); | |
3076 | ||
51dcdd4d NC |
3077 | opcode_value |= this_line_creg << creg->bitfields[0].low_pos; |
3078 | opcode_value |= this_line_z << z->bitfields[0].low_pos; | |
40b36596 JM |
3079 | } |
3080 | ||
3081 | *ok = TRUE; | |
3082 | return opcode_value; | |
3083 | } | |
3084 | ||
3085 | /* Convert the target integer stored in N bytes in BUF to a host | |
3086 | integer, returning that value. */ | |
3087 | ||
3088 | static valueT | |
3089 | md_chars_to_number (char *buf, int n) | |
3090 | { | |
3091 | valueT result = 0; | |
3092 | unsigned char *p = (unsigned char *) buf; | |
3093 | ||
3094 | if (target_big_endian) | |
3095 | { | |
3096 | while (n--) | |
3097 | { | |
3098 | result <<= 8; | |
3099 | result |= (*p++ & 0xff); | |
3100 | } | |
3101 | } | |
3102 | else | |
3103 | { | |
3104 | while (n--) | |
3105 | { | |
3106 | result <<= 8; | |
3107 | result |= (p[n] & 0xff); | |
3108 | } | |
3109 | } | |
3110 | ||
3111 | return result; | |
3112 | } | |
3113 | ||
3114 | /* Assemble the instruction starting at STR (an opcode, with the | |
3115 | opcode name all-lowercase). */ | |
3116 | ||
3117 | void | |
3118 | md_assemble (char *str) | |
3119 | { | |
3120 | char *p; | |
3121 | int opc_len; | |
3122 | bfd_boolean this_line_parallel; | |
3123 | bfd_boolean this_line_spmask; | |
3124 | unsigned int this_line_creg; | |
3125 | unsigned int this_line_z; | |
d99e5b39 | 3126 | tic6x_label_list *this_insn_label_list; |
40b36596 JM |
3127 | segment_info_type *seginfo; |
3128 | tic6x_opcode_list *opc_list, *opc; | |
3129 | tic6x_func_unit_base func_unit_base = tic6x_func_unit_nfu; | |
3130 | unsigned int func_unit_side = 0; | |
3131 | unsigned int func_unit_cross = 0; | |
3132 | unsigned int cross_side = 0; | |
3133 | unsigned int func_unit_data_side = 0; | |
3134 | unsigned int max_matching_opcodes, num_matching_opcodes; | |
3135 | tic6x_opcode_id *opcm = NULL; | |
3136 | unsigned int opc_rank[TIC6X_NUM_PREFER]; | |
3137 | const tic6x_opcode *opct = NULL; | |
3138 | int min_rank, try_rank, max_rank; | |
3139 | bfd_boolean num_operands_permitted[TIC6X_MAX_SOURCE_OPERANDS + 1] | |
3140 | = { FALSE }; | |
3141 | unsigned int operand_forms[TIC6X_MAX_SOURCE_OPERANDS] = { 0 }; | |
3142 | tic6x_operand operands[TIC6X_MAX_SOURCE_OPERANDS]; | |
3143 | unsigned int max_num_operands; | |
3144 | unsigned int num_operands_read; | |
3145 | bfd_boolean ok_this_arch, ok_this_fu, ok_this_arch_fu; | |
3146 | bfd_boolean bad_operands = FALSE; | |
3147 | unsigned int opcode_value; | |
3148 | bfd_boolean encoded_ok; | |
3149 | bfd_boolean fix_needed = FALSE; | |
3150 | expressionS *fix_exp = NULL; | |
3151 | int fix_pcrel = 0; | |
3152 | bfd_reloc_code_real_type fx_r_type = BFD_RELOC_UNUSED; | |
3153 | bfd_boolean fix_adda = FALSE; | |
d99e5b39 | 3154 | fragS *insn_frag; |
40b36596 JM |
3155 | char *output; |
3156 | ||
3157 | p = str; | |
3158 | while (*p && !is_end_of_line[(unsigned char) *p] && *p != ' ') | |
3159 | p++; | |
3160 | ||
3161 | /* This function should only have been called when there is actually | |
3162 | an instruction to assemble. */ | |
3163 | if (p == str) | |
3164 | abort (); | |
3165 | ||
59e6276b JM |
3166 | /* Now an instruction has been seen, architecture attributes from |
3167 | .arch directives merge with rather than overriding the previous | |
3168 | value. */ | |
3169 | tic6x_seen_insns = TRUE; | |
3170 | /* If no .arch directives or -march options have been seen, we are | |
3171 | assessing instruction validity based on the C674X default, so set | |
3172 | the attribute accordingly. */ | |
75fa6dc1 JM |
3173 | if (tic6x_arch_attribute == C6XABI_Tag_ISA_none) |
3174 | tic6x_arch_attribute = C6XABI_Tag_ISA_C674X; | |
59e6276b | 3175 | |
40b36596 JM |
3176 | /* Reset global settings for parallel bars and predicates now to |
3177 | avoid extra errors if there are problems with this opcode. */ | |
3178 | this_line_parallel = tic6x_line_parallel; | |
3179 | this_line_spmask = tic6x_line_spmask; | |
3180 | this_line_creg = tic6x_line_creg; | |
3181 | this_line_z = tic6x_line_z; | |
3182 | tic6x_line_parallel = FALSE; | |
3183 | tic6x_line_spmask = FALSE; | |
3184 | tic6x_line_creg = 0; | |
3185 | tic6x_line_z = 0; | |
3186 | seginfo = seg_info (now_seg); | |
d99e5b39 JM |
3187 | this_insn_label_list = seginfo->tc_segment_info_data.label_list; |
3188 | seginfo->tc_segment_info_data.label_list = NULL; | |
40b36596 JM |
3189 | |
3190 | opc_list = hash_find_n (opcode_hash, str, p - str); | |
3191 | if (opc_list == NULL) | |
3192 | { | |
3193 | char c = *p; | |
3194 | *p = 0; | |
3195 | as_bad (_("unknown opcode '%s'"), str); | |
3196 | *p = c; | |
3197 | return; | |
3198 | } | |
3199 | ||
3200 | opc_len = p - str; | |
3201 | skip_whitespace (p); | |
3202 | ||
3203 | /* See if there is something that looks like a functional unit | |
3204 | specifier. */ | |
3205 | if (*p == '.') | |
3206 | { | |
3207 | bfd_boolean good_func_unit; | |
3208 | tic6x_func_unit_base maybe_base = tic6x_func_unit_nfu; | |
3209 | unsigned int maybe_side = 0; | |
3210 | unsigned int maybe_cross = 0; | |
3211 | unsigned int maybe_data_side = 0; | |
3212 | ||
3213 | good_func_unit = tic6x_parse_func_unit_base (p + 1, &maybe_base, | |
3214 | &maybe_side); | |
3215 | ||
3216 | if (good_func_unit) | |
3217 | { | |
3218 | if (p[3] == ' ' || is_end_of_line[(unsigned char) p[3]]) | |
3219 | p += 3; | |
3220 | else if ((p[3] == 'x' || p[3] == 'X') | |
3221 | && (p[4] == ' ' || is_end_of_line[(unsigned char) p[4]])) | |
3222 | { | |
3223 | maybe_cross = 1; | |
3224 | p += 4; | |
3225 | } | |
3226 | else if (maybe_base == tic6x_func_unit_d | |
3227 | && (p[3] == 't' || p[3] == 'T') | |
3228 | && (p[4] == '1' || p[4] == '2') | |
3229 | && (p[5] == ' ' || is_end_of_line[(unsigned char) p[5]])) | |
3230 | { | |
3231 | maybe_data_side = p[4] - '0'; | |
3232 | p += 5; | |
3233 | } | |
3234 | else | |
3235 | good_func_unit = FALSE; | |
3236 | } | |
3237 | ||
3238 | if (good_func_unit) | |
3239 | { | |
3240 | func_unit_base = maybe_base; | |
3241 | func_unit_side = maybe_side; | |
3242 | func_unit_cross = maybe_cross; | |
3243 | cross_side = (func_unit_cross ? 3 - func_unit_side : func_unit_side); | |
3244 | func_unit_data_side = maybe_data_side; | |
3245 | } | |
3246 | ||
3247 | skip_whitespace (p); | |
3248 | } | |
3249 | ||
3250 | /* Determine which entries in the opcode table match, and the | |
3251 | associated permitted forms of operands. */ | |
3252 | max_matching_opcodes = 0; | |
3253 | for (opc = opc_list; opc; opc = opc->next) | |
3254 | max_matching_opcodes++; | |
3255 | num_matching_opcodes = 0; | |
3256 | opcm = xmalloc (max_matching_opcodes * sizeof (*opcm)); | |
3257 | max_num_operands = 0; | |
3258 | ok_this_arch = FALSE; | |
3259 | ok_this_fu = FALSE; | |
3260 | ok_this_arch_fu = FALSE; | |
3261 | for (opc = opc_list; opc; opc = opc->next) | |
3262 | { | |
3263 | unsigned int num_operands; | |
3264 | unsigned int i; | |
3265 | bfd_boolean this_opc_arch_ok = TRUE; | |
3266 | bfd_boolean this_opc_fu_ok = TRUE; | |
3267 | ||
3268 | if (tic6x_insn_format_table[tic6x_opcode_table[opc->id].format].num_bits | |
3269 | != 32) | |
3270 | continue; | |
3271 | if (!(tic6x_opcode_table[opc->id].isa_variants & tic6x_features)) | |
3272 | this_opc_arch_ok = FALSE; | |
3273 | if (tic6x_opcode_table[opc->id].func_unit != func_unit_base) | |
3274 | this_opc_fu_ok = FALSE; | |
3275 | if (func_unit_side == 1 | |
3276 | && (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_SIDE_B_ONLY)) | |
3277 | this_opc_fu_ok = FALSE; | |
3278 | if (func_unit_cross | |
3279 | && (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_NO_CROSS)) | |
3280 | this_opc_fu_ok = FALSE; | |
3281 | if (!func_unit_data_side | |
3282 | && (tic6x_opcode_table[opc->id].flags | |
3283 | & (TIC6X_FLAG_LOAD | TIC6X_FLAG_STORE))) | |
3284 | this_opc_fu_ok = FALSE; | |
3285 | if (func_unit_data_side | |
3286 | && !(tic6x_opcode_table[opc->id].flags | |
3287 | & (TIC6X_FLAG_LOAD | TIC6X_FLAG_STORE))) | |
3288 | this_opc_fu_ok = FALSE; | |
3289 | if (func_unit_data_side == 1 | |
3290 | && (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_SIDE_T2_ONLY)) | |
3291 | this_opc_fu_ok = FALSE; | |
3292 | if (this_opc_arch_ok) | |
3293 | ok_this_arch = TRUE; | |
3294 | if (this_opc_fu_ok) | |
3295 | ok_this_fu = TRUE; | |
3296 | if (!this_opc_arch_ok || !this_opc_fu_ok) | |
3297 | continue; | |
3298 | ok_this_arch_fu = TRUE; | |
3299 | opcm[num_matching_opcodes] = opc->id; | |
3300 | num_matching_opcodes++; | |
3301 | num_operands = tic6x_opcode_table[opc->id].num_operands; | |
3302 | ||
3303 | if (tic6x_opcode_table[opc->id].flags & TIC6X_FLAG_SPMASK) | |
3304 | { | |
3305 | if (num_operands != 1 | |
3306 | || (tic6x_opcode_table[opc->id].operand_info[0].form | |
3307 | != tic6x_operand_func_unit)) | |
3308 | abort (); | |
3309 | num_operands = 8; | |
3310 | for (i = 0; i < num_operands; i++) | |
3311 | { | |
3312 | operand_forms[i] | |
3313 | |= tic6x_coarse_operand_form (tic6x_operand_func_unit); | |
3314 | num_operands_permitted[i] = TRUE; | |
3315 | } | |
3316 | } | |
3317 | else | |
3318 | { | |
3319 | for (i = 0; i < num_operands; i++) | |
3320 | { | |
3321 | tic6x_operand_form f | |
3322 | = tic6x_opcode_table[opc->id].operand_info[i].form; | |
3323 | ||
3324 | operand_forms[i] |= tic6x_coarse_operand_form (f); | |
3325 | } | |
3326 | } | |
3327 | num_operands_permitted[num_operands] = TRUE; | |
3328 | if (num_operands > max_num_operands) | |
3329 | max_num_operands = num_operands; | |
3330 | } | |
3331 | ||
3332 | if (!ok_this_arch) | |
3333 | { | |
3334 | as_bad (_("'%.*s' instruction not supported on this architecture"), | |
3335 | opc_len, str); | |
3336 | free (opcm); | |
3337 | return; | |
3338 | } | |
3339 | ||
3340 | if (!ok_this_fu) | |
3341 | { | |
3342 | as_bad (_("'%.*s' instruction not supported on this functional unit"), | |
3343 | opc_len, str); | |
3344 | free (opcm); | |
3345 | return; | |
3346 | } | |
3347 | ||
3348 | if (!ok_this_arch_fu) | |
3349 | { | |
3350 | as_bad (_("'%.*s' instruction not supported on this functional unit" | |
3351 | " for this architecture"), | |
3352 | opc_len, str); | |
3353 | free (opcm); | |
3354 | return; | |
3355 | } | |
3356 | ||
3357 | /* If there were no instructions matching the above availability | |
3358 | checks, we should now have given an error and returned. */ | |
3359 | if (num_matching_opcodes == 0) | |
3360 | abort (); | |
3361 | ||
3362 | num_operands_read = 0; | |
3363 | while (TRUE) | |
3364 | { | |
3365 | skip_whitespace (p); | |
3366 | if (is_end_of_line[(unsigned char) *p]) | |
3367 | { | |
3368 | if (num_operands_read > 0) | |
3369 | { | |
3370 | as_bad (_("missing operand after comma")); | |
3371 | bad_operands = TRUE; | |
3372 | } | |
3373 | break; | |
3374 | } | |
3375 | ||
3376 | if (max_num_operands == 0) | |
3377 | { | |
3378 | as_bad (_("too many operands to '%.*s'"), opc_len, str); | |
3379 | bad_operands = TRUE; | |
3380 | break; | |
3381 | } | |
3382 | ||
3383 | if (!tic6x_parse_operand (&p, &operands[num_operands_read], | |
3384 | operand_forms[num_operands_read], str, opc_len, | |
3385 | num_operands_read + 1)) | |
3386 | bad_operands = TRUE; | |
3387 | num_operands_read++; | |
3388 | ||
3389 | if (is_end_of_line[(unsigned char) *p]) | |
3390 | break; | |
3391 | else if (*p == ',') | |
3392 | { | |
3393 | p++; | |
3394 | if (num_operands_read == max_num_operands) | |
3395 | { | |
3396 | as_bad (_("too many operands to '%.*s'"), opc_len, str); | |
3397 | bad_operands = TRUE; | |
3398 | break; | |
3399 | } | |
3400 | continue; | |
3401 | } | |
3402 | else | |
3403 | /* Operand parsing should consume whole operands. */ | |
3404 | abort (); | |
3405 | } | |
3406 | ||
3407 | if (!bad_operands && !num_operands_permitted[num_operands_read]) | |
3408 | { | |
3409 | as_bad (_("bad number of operands to '%.*s'"), opc_len, str); | |
3410 | bad_operands = TRUE; | |
3411 | } | |
3412 | ||
3413 | if (!bad_operands) | |
3414 | { | |
3415 | /* Each operand is of the right syntactic form for some opcode | |
3416 | choice, and the number of operands is valid. Check that each | |
3417 | operand is OK in detail for some opcode choice with the right | |
3418 | number of operands. */ | |
3419 | unsigned int i; | |
3420 | ||
3421 | for (i = 0; i < num_operands_read; i++) | |
3422 | { | |
3423 | bfd_boolean coarse_ok = FALSE; | |
3424 | bfd_boolean fine_ok = FALSE; | |
3425 | tic6x_operand_match fine_failure = tic6x_match_matches; | |
3426 | unsigned int j; | |
3427 | ||
3428 | for (j = 0; j < num_matching_opcodes; j++) | |
3429 | { | |
3430 | tic6x_operand_form f; | |
3431 | tic6x_rw rw; | |
3432 | unsigned int cf; | |
3433 | tic6x_operand_match this_fine_failure; | |
3434 | ||
3435 | if (tic6x_opcode_table[opcm[j]].flags & TIC6X_FLAG_SPMASK) | |
3436 | { | |
3437 | f = tic6x_operand_func_unit; | |
3438 | rw = tic6x_rw_none; | |
3439 | } | |
3440 | else | |
3441 | { | |
3442 | if (tic6x_opcode_table[opcm[j]].num_operands | |
3443 | != num_operands_read) | |
3444 | continue; | |
3445 | ||
3446 | f = tic6x_opcode_table[opcm[j]].operand_info[i].form; | |
3447 | rw = tic6x_opcode_table[opcm[j]].operand_info[i].rw; | |
3448 | } | |
3449 | cf = tic6x_coarse_operand_form (f); | |
3450 | ||
3451 | if (operands[i].form != cf) | |
3452 | continue; | |
3453 | ||
3454 | coarse_ok = TRUE; | |
3455 | this_fine_failure | |
3456 | = tic6x_operand_matches_form (&operands[i], f, rw, | |
3457 | func_unit_side, | |
3458 | cross_side, | |
3459 | func_unit_data_side); | |
3460 | if (this_fine_failure == tic6x_match_matches) | |
3461 | { | |
3462 | fine_ok = TRUE; | |
3463 | break; | |
3464 | } | |
3465 | if (fine_failure == tic6x_match_matches | |
3466 | || fine_failure > this_fine_failure) | |
3467 | fine_failure = this_fine_failure; | |
3468 | } | |
3469 | ||
3470 | /* No instructions should have operand syntactic forms only | |
3471 | acceptable with certain numbers of operands, so no | |
3472 | diagnostic for this case. */ | |
3473 | if (!coarse_ok) | |
3474 | abort (); | |
3475 | ||
3476 | if (!fine_ok) | |
3477 | { | |
3478 | switch (fine_failure) | |
3479 | { | |
3480 | case tic6x_match_non_const: | |
3481 | as_bad (_("operand %u of '%.*s' not constant"), | |
3482 | i + 1, opc_len, str); | |
3483 | break; | |
3484 | ||
3485 | case tic6x_match_wrong_side: | |
3486 | as_bad (_("operand %u of '%.*s' on wrong side"), | |
3487 | i + 1, opc_len, str); | |
3488 | break; | |
3489 | ||
3490 | case tic6x_match_bad_return: | |
3491 | as_bad (_("operand %u of '%.*s' not a valid return " | |
3492 | "address register"), | |
3493 | i + 1, opc_len, str); | |
3494 | break; | |
3495 | ||
3496 | case tic6x_match_ctrl_write_only: | |
3497 | as_bad (_("operand %u of '%.*s' is write-only"), | |
3498 | i + 1, opc_len, str); | |
3499 | break; | |
3500 | ||
3501 | case tic6x_match_ctrl_read_only: | |
3502 | as_bad (_("operand %u of '%.*s' is read-only"), | |
3503 | i + 1, opc_len, str); | |
3504 | break; | |
3505 | ||
3506 | case tic6x_match_bad_mem: | |
3507 | as_bad (_("operand %u of '%.*s' not a valid memory " | |
3508 | "reference"), | |
3509 | i + 1, opc_len, str); | |
3510 | break; | |
3511 | ||
3512 | case tic6x_match_bad_address: | |
3513 | as_bad (_("operand %u of '%.*s' not a valid base " | |
3514 | "address register"), | |
3515 | i + 1, opc_len, str); | |
3516 | break; | |
3517 | ||
3518 | default: | |
3519 | abort (); | |
3520 | } | |
3521 | bad_operands = TRUE; | |
3522 | break; | |
3523 | } | |
3524 | } | |
3525 | } | |
3526 | ||
3527 | if (!bad_operands) | |
3528 | { | |
3529 | /* Each operand is OK for some opcode choice, and the number of | |
3530 | operands is valid. Check whether there is an opcode choice | |
3531 | for which all operands are simultaneously valid. */ | |
3532 | unsigned int i; | |
3533 | bfd_boolean found_match = FALSE; | |
3534 | ||
3535 | for (i = 0; i < TIC6X_NUM_PREFER; i++) | |
3536 | opc_rank[i] = (unsigned int) -1; | |
3537 | ||
3538 | min_rank = TIC6X_NUM_PREFER - 1; | |
3539 | max_rank = 0; | |
3540 | ||
3541 | for (i = 0; i < num_matching_opcodes; i++) | |
3542 | { | |
3543 | unsigned int j; | |
3544 | bfd_boolean this_matches = TRUE; | |
3545 | ||
3546 | if (!(tic6x_opcode_table[opcm[i]].flags & TIC6X_FLAG_SPMASK) | |
3547 | && tic6x_opcode_table[opcm[i]].num_operands != num_operands_read) | |
3548 | continue; | |
3549 | ||
3550 | for (j = 0; j < num_operands_read; j++) | |
3551 | { | |
3552 | tic6x_operand_form f; | |
3553 | tic6x_rw rw; | |
3554 | ||
3555 | if (tic6x_opcode_table[opcm[i]].flags & TIC6X_FLAG_SPMASK) | |
3556 | { | |
3557 | f = tic6x_operand_func_unit; | |
3558 | rw = tic6x_rw_none; | |
3559 | } | |
3560 | else | |
3561 | { | |
3562 | f = tic6x_opcode_table[opcm[i]].operand_info[j].form; | |
3563 | rw = tic6x_opcode_table[opcm[i]].operand_info[j].rw; | |
3564 | } | |
3565 | if (tic6x_operand_matches_form (&operands[j], f, rw, | |
3566 | func_unit_side, | |
3567 | cross_side, | |
3568 | func_unit_data_side) | |
3569 | != tic6x_match_matches) | |
3570 | { | |
3571 | this_matches = FALSE; | |
3572 | break; | |
3573 | } | |
3574 | } | |
3575 | ||
3576 | if (this_matches) | |
3577 | { | |
3578 | int rank = TIC6X_PREFER_VAL (tic6x_opcode_table[opcm[i]].flags); | |
3579 | ||
3580 | if (rank < min_rank) | |
3581 | min_rank = rank; | |
3582 | if (rank > max_rank) | |
3583 | max_rank = rank; | |
3584 | ||
3585 | if (opc_rank[rank] == (unsigned int) -1) | |
3586 | opc_rank[rank] = i; | |
3587 | else | |
3588 | /* The opcode table should provide a total ordering | |
3589 | for all cases where multiple matches may get | |
3590 | here. */ | |
3591 | abort (); | |
3592 | ||
3593 | found_match = TRUE; | |
3594 | } | |
3595 | } | |
3596 | ||
3597 | if (!found_match) | |
3598 | { | |
3599 | as_bad (_("bad operand combination for '%.*s'"), opc_len, str); | |
3600 | bad_operands = TRUE; | |
3601 | } | |
3602 | } | |
3603 | ||
3604 | if (bad_operands) | |
3605 | { | |
3606 | free (opcm); | |
3607 | return; | |
3608 | } | |
3609 | ||
3610 | opcode_value = 0; | |
3611 | encoded_ok = FALSE; | |
3612 | for (try_rank = max_rank; try_rank >= min_rank; try_rank--) | |
3613 | { | |
3614 | fix_needed = FALSE; | |
3615 | ||
3616 | if (opc_rank[try_rank] == (unsigned int) -1) | |
3617 | continue; | |
3618 | ||
3619 | opcode_value = tic6x_try_encode (opcm[opc_rank[try_rank]], operands, | |
3620 | num_operands_read, this_line_creg, | |
3621 | this_line_z, func_unit_side, | |
3622 | func_unit_cross, func_unit_data_side, | |
3623 | seginfo->tc_segment_info_data.sploop_ii, | |
3624 | &fix_exp, &fix_pcrel, &fx_r_type, | |
3625 | &fix_adda, &fix_needed, &encoded_ok, | |
3626 | (try_rank == min_rank ? TRUE : FALSE), | |
3627 | str, opc_len); | |
3628 | if (encoded_ok) | |
3629 | { | |
3630 | opct = &tic6x_opcode_table[opcm[opc_rank[try_rank]]]; | |
3631 | break; | |
3632 | } | |
3633 | } | |
3634 | ||
3635 | free (opcm); | |
3636 | ||
3637 | if (!encoded_ok) | |
3638 | return; | |
3639 | ||
3640 | if (this_line_parallel) | |
3641 | { | |
d99e5b39 JM |
3642 | insn_frag = seginfo->tc_segment_info_data.execute_packet_frag; |
3643 | if (insn_frag == NULL) | |
40b36596 JM |
3644 | { |
3645 | as_bad (_("parallel instruction not following another instruction")); | |
3646 | return; | |
3647 | } | |
3648 | ||
d99e5b39 | 3649 | if (insn_frag->fr_fix >= 32) |
40b36596 JM |
3650 | { |
3651 | as_bad (_("too many instructions in execute packet")); | |
3652 | return; | |
3653 | } | |
3654 | ||
d99e5b39 | 3655 | if (this_insn_label_list != NULL) |
40b36596 JM |
3656 | as_bad (_("label not at start of execute packet")); |
3657 | ||
3658 | if (opct->flags & TIC6X_FLAG_FIRST) | |
3659 | as_bad (_("'%.*s' instruction not at start of execute packet"), | |
3660 | opc_len, str); | |
3661 | ||
3662 | *seginfo->tc_segment_info_data.last_insn_lsb |= 0x1; | |
d99e5b39 | 3663 | output = insn_frag->fr_literal + insn_frag->fr_fix; |
40b36596 JM |
3664 | } |
3665 | else | |
3666 | { | |
d99e5b39 JM |
3667 | tic6x_label_list *l; |
3668 | ||
40b36596 | 3669 | seginfo->tc_segment_info_data.spmask_addr = NULL; |
38bd8d09 | 3670 | seginfo->tc_segment_info_data.func_units_used = 0; |
d99e5b39 JM |
3671 | |
3672 | /* Start a new frag for this execute packet. */ | |
3673 | if (frag_now_fix () != 0) | |
3674 | { | |
3675 | if (frag_now->fr_type != rs_machine_dependent) | |
3676 | frag_wane (frag_now); | |
3677 | ||
3678 | frag_new (0); | |
3679 | } | |
3680 | frag_grow (32); | |
3681 | insn_frag = seginfo->tc_segment_info_data.execute_packet_frag = frag_now; | |
3682 | for (l = this_insn_label_list; l; l = l->next) | |
3683 | { | |
3684 | symbol_set_frag (l->label, frag_now); | |
3685 | S_SET_VALUE (l->label, 0); | |
3686 | S_SET_SEGMENT (l->label, now_seg); | |
3687 | } | |
3688 | tic6x_free_label_list (this_insn_label_list); | |
3689 | dwarf2_emit_insn (0); | |
3690 | output = frag_var (rs_machine_dependent, 32, 32, 0, NULL, 0, NULL); | |
3691 | /* This must be the same as the frag to which a pointer was just | |
3692 | saved. */ | |
3693 | if (output != insn_frag->fr_literal) | |
3694 | abort (); | |
3695 | insn_frag->tc_frag_data.is_insns = TRUE; | |
3696 | insn_frag->tc_frag_data.can_cross_fp_boundary | |
3697 | = tic6x_can_cross_fp_boundary; | |
40b36596 JM |
3698 | } |
3699 | ||
38bd8d09 JM |
3700 | if (func_unit_base != tic6x_func_unit_nfu) |
3701 | { | |
3702 | unsigned int func_unit_enc; | |
3703 | ||
3704 | func_unit_enc = tic6x_encode_spmask (func_unit_base, func_unit_side); | |
3705 | ||
3706 | if (seginfo->tc_segment_info_data.func_units_used & func_unit_enc) | |
3707 | as_bad (_("functional unit already used in this execute packet")); | |
3708 | ||
3709 | seginfo->tc_segment_info_data.func_units_used |= func_unit_enc; | |
3710 | } | |
3711 | ||
40b36596 JM |
3712 | if (opct->flags & TIC6X_FLAG_SPLOOP) |
3713 | { | |
3714 | if (seginfo->tc_segment_info_data.sploop_ii) | |
3715 | as_bad (_("nested software pipelined loop")); | |
3716 | if (num_operands_read != 1 | |
3717 | || operands[0].form != TIC6X_OP_EXP | |
3718 | || operands[0].value.exp.X_op != O_constant) | |
3719 | abort (); | |
3720 | seginfo->tc_segment_info_data.sploop_ii | |
3721 | = operands[0].value.exp.X_add_number; | |
3722 | } | |
3723 | else if (opct->flags & TIC6X_FLAG_SPKERNEL) | |
3724 | { | |
3725 | if (!seginfo->tc_segment_info_data.sploop_ii) | |
3726 | as_bad (_("'%.*s' instruction not in a software pipelined loop"), | |
3727 | opc_len, str); | |
3728 | seginfo->tc_segment_info_data.sploop_ii = 0; | |
3729 | } | |
3730 | ||
3731 | if (this_line_spmask) | |
3732 | { | |
3733 | if (seginfo->tc_segment_info_data.spmask_addr == NULL) | |
3734 | as_bad (_("'||^' without previous SPMASK")); | |
3735 | else if (func_unit_base == tic6x_func_unit_nfu) | |
3736 | as_bad (_("cannot mask instruction using no functional unit")); | |
3737 | else | |
3738 | { | |
3739 | unsigned int spmask_opcode; | |
3740 | unsigned int mask_bit; | |
3741 | ||
3742 | spmask_opcode | |
3743 | = md_chars_to_number (seginfo->tc_segment_info_data.spmask_addr, | |
3744 | 4); | |
3745 | mask_bit = tic6x_encode_spmask (func_unit_base, func_unit_side); | |
3746 | mask_bit <<= 18; | |
3747 | if (spmask_opcode & mask_bit) | |
3748 | as_bad (_("functional unit already masked")); | |
3749 | spmask_opcode |= mask_bit; | |
3750 | md_number_to_chars (seginfo->tc_segment_info_data.spmask_addr, | |
3751 | spmask_opcode, 4); | |
3752 | } | |
3753 | } | |
3754 | ||
3755 | record_alignment (now_seg, 5); | |
40b36596 JM |
3756 | md_number_to_chars (output, opcode_value, 4); |
3757 | if (fix_needed) | |
d99e5b39 | 3758 | tic6x_fix_new_exp (insn_frag, output - insn_frag->fr_literal, 4, fix_exp, |
40b36596 | 3759 | fix_pcrel, fx_r_type, fix_adda); |
d99e5b39 JM |
3760 | insn_frag->fr_fix += 4; |
3761 | insn_frag->fr_var -= 4; | |
40b36596 JM |
3762 | seginfo->tc_segment_info_data.last_insn_lsb |
3763 | = (target_big_endian ? output + 3 : output); | |
3764 | if (opct->flags & TIC6X_FLAG_SPMASK) | |
3765 | seginfo->tc_segment_info_data.spmask_addr = output; | |
40b36596 JM |
3766 | } |
3767 | ||
3768 | /* Modify NEWVAL (32-bit) by inserting VALUE, shifted right by SHIFT | |
3769 | and the least significant BITS bits taken, at position POS. */ | |
3770 | #define MODIFY_VALUE(NEWVAL, VALUE, SHIFT, POS, BITS) \ | |
3771 | do { \ | |
3772 | (NEWVAL) &= 0xffffffffU & ~(((1U << (BITS)) - 1) << (POS)); \ | |
3773 | (NEWVAL) |= (((VALUE) >> (SHIFT)) & ((1U << (BITS)) - 1)) << (POS); \ | |
3774 | } while (0) | |
3775 | ||
3776 | /* Apply a fixup to the object file. */ | |
3777 | ||
3778 | void | |
3779 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) | |
3780 | { | |
3781 | offsetT value = *valP; | |
3782 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
3783 | ||
3784 | value = SEXT (value); | |
3785 | *valP = value; | |
3786 | ||
3787 | fixP->fx_offset = SEXT (fixP->fx_offset); | |
3788 | ||
3789 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
3790 | fixP->fx_done = 1; | |
3791 | ||
3792 | /* We do our own overflow checks. */ | |
3793 | fixP->fx_no_overflow = 1; | |
3794 | ||
3795 | switch (fixP->fx_r_type) | |
3796 | { | |
3797 | case BFD_RELOC_NONE: | |
2fbb87f6 | 3798 | case BFD_RELOC_C6000_EHTYPE: |
40b36596 JM |
3799 | /* Force output to the object file. */ |
3800 | fixP->fx_done = 0; | |
3801 | break; | |
3802 | ||
3803 | case BFD_RELOC_32: | |
3804 | if (fixP->fx_done || !seg->use_rela_p) | |
3805 | md_number_to_chars (buf, value, 4); | |
3806 | break; | |
3807 | ||
3808 | case BFD_RELOC_16: | |
3809 | if (fixP->fx_done || !seg->use_rela_p) | |
3810 | { | |
3811 | if (value < -0x8000 || value > 0xffff) | |
3812 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3813 | _("value too large for 2-byte field")); | |
3814 | md_number_to_chars (buf, value, 2); | |
3815 | } | |
3816 | break; | |
3817 | ||
3818 | case BFD_RELOC_8: | |
3819 | if (fixP->fx_done || !seg->use_rela_p) | |
3820 | { | |
3821 | if (value < -0x80 || value > 0xff) | |
3822 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3823 | _("value too large for 1-byte field")); | |
7e9def1e | 3824 | *buf = value; |
40b36596 JM |
3825 | } |
3826 | break; | |
3827 | ||
3828 | case BFD_RELOC_C6000_ABS_S16: | |
3829 | case BFD_RELOC_C6000_ABS_L16: | |
3830 | case BFD_RELOC_C6000_SBR_S16: | |
3831 | case BFD_RELOC_C6000_SBR_L16_B: | |
3832 | case BFD_RELOC_C6000_SBR_L16_H: | |
3833 | case BFD_RELOC_C6000_SBR_L16_W: | |
3834 | case BFD_RELOC_C6000_SBR_GOT_L16_W: | |
3835 | if (fixP->fx_done || !seg->use_rela_p) | |
3836 | { | |
3837 | offsetT newval = md_chars_to_number (buf, 4); | |
41820509 JM |
3838 | int shift; |
3839 | ||
3840 | switch (fixP->fx_r_type) | |
3841 | { | |
3842 | case BFD_RELOC_C6000_SBR_L16_H: | |
3843 | shift = 1; | |
3844 | break; | |
3845 | ||
3846 | case BFD_RELOC_C6000_SBR_L16_W: | |
3847 | case BFD_RELOC_C6000_SBR_GOT_L16_W: | |
3848 | shift = 2; | |
3849 | break; | |
3850 | ||
3851 | default: | |
3852 | shift = 0; | |
3853 | break; | |
3854 | } | |
40b36596 | 3855 | |
41820509 | 3856 | MODIFY_VALUE (newval, value, shift, 7, 16); |
40b36596 JM |
3857 | if ((value < -0x8000 || value > 0x7fff) |
3858 | && (fixP->fx_r_type == BFD_RELOC_C6000_ABS_S16 | |
3859 | || fixP->fx_r_type == BFD_RELOC_C6000_SBR_S16)) | |
3860 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3861 | _("immediate offset out of range")); | |
3862 | ||
3863 | md_number_to_chars (buf, newval, 4); | |
3864 | } | |
3865 | if (fixP->fx_done | |
3866 | && fixP->fx_r_type != BFD_RELOC_C6000_ABS_S16 | |
3867 | && fixP->fx_r_type != BFD_RELOC_C6000_ABS_L16) | |
3868 | abort (); | |
3869 | break; | |
3870 | ||
3871 | case BFD_RELOC_C6000_ABS_H16: | |
3872 | case BFD_RELOC_C6000_SBR_H16_B: | |
3873 | case BFD_RELOC_C6000_SBR_H16_H: | |
3874 | case BFD_RELOC_C6000_SBR_H16_W: | |
3875 | case BFD_RELOC_C6000_SBR_GOT_H16_W: | |
3876 | if (fixP->fx_done || !seg->use_rela_p) | |
3877 | { | |
3878 | offsetT newval = md_chars_to_number (buf, 4); | |
41820509 JM |
3879 | int shift; |
3880 | ||
3881 | switch (fixP->fx_r_type) | |
3882 | { | |
3883 | case BFD_RELOC_C6000_SBR_H16_H: | |
3884 | shift = 17; | |
3885 | break; | |
3886 | ||
3887 | case BFD_RELOC_C6000_SBR_H16_W: | |
3888 | case BFD_RELOC_C6000_SBR_GOT_H16_W: | |
3889 | shift = 18; | |
3890 | break; | |
40b36596 | 3891 | |
41820509 JM |
3892 | default: |
3893 | shift = 16; | |
3894 | break; | |
3895 | } | |
3896 | ||
3897 | MODIFY_VALUE (newval, value, shift, 7, 16); | |
40b36596 JM |
3898 | |
3899 | md_number_to_chars (buf, newval, 4); | |
3900 | } | |
3901 | if (fixP->fx_done && fixP->fx_r_type != BFD_RELOC_C6000_ABS_H16) | |
3902 | abort (); | |
3903 | break; | |
3904 | ||
4a732032 BS |
3905 | case BFD_RELOC_C6000_PCR_H16: |
3906 | case BFD_RELOC_C6000_PCR_L16: | |
3907 | if (fixP->fx_done || !seg->use_rela_p) | |
3908 | { | |
3909 | offsetT newval = md_chars_to_number (buf, 4); | |
3910 | int shift = fixP->fx_r_type == BFD_RELOC_C6000_PCR_H16 ? 16 : 0; | |
3911 | ||
3912 | MODIFY_VALUE (newval, value, shift, 7, 16); | |
3913 | ||
3914 | md_number_to_chars (buf, newval, 4); | |
3915 | } | |
3916 | break; | |
3917 | ||
40b36596 JM |
3918 | case BFD_RELOC_C6000_SBR_U15_B: |
3919 | if (fixP->fx_done || !seg->use_rela_p) | |
3920 | { | |
3921 | offsetT newval = md_chars_to_number (buf, 4); | |
3922 | ||
3923 | MODIFY_VALUE (newval, value, 0, 8, 15); | |
3924 | if (value < 0 || value > 0x7fff) | |
3925 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3926 | _("immediate offset out of range")); | |
3927 | ||
3928 | md_number_to_chars (buf, newval, 4); | |
3929 | } | |
3930 | break; | |
3931 | ||
3932 | case BFD_RELOC_C6000_SBR_U15_H: | |
3933 | if (fixP->fx_done || !seg->use_rela_p) | |
3934 | { | |
3935 | offsetT newval = md_chars_to_number (buf, 4); | |
3936 | ||
3937 | /* Constant ADDA operands, processed as constant when the | |
3938 | instruction is parsed, are encoded as-is rather than | |
3939 | shifted. If the operand of an ADDA instruction is now | |
3940 | constant (for example, the difference between two labels | |
3941 | found after the instruction), ensure it is encoded the | |
3942 | same way it would have been if the constant value had | |
3943 | been known when the instruction was parsed. */ | |
3944 | if (fixP->tc_fix_data.fix_adda && fixP->fx_done) | |
3945 | value <<= 1; | |
3946 | ||
3947 | MODIFY_VALUE (newval, value, 1, 8, 15); | |
3948 | if (value & 1) | |
3949 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3950 | _("immediate offset not 2-byte-aligned")); | |
3951 | if (value < 0 || value > 0xfffe) | |
3952 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3953 | _("immediate offset out of range")); | |
3954 | ||
3955 | md_number_to_chars (buf, newval, 4); | |
3956 | } | |
3957 | break; | |
3958 | ||
3959 | case BFD_RELOC_C6000_SBR_U15_W: | |
3960 | case BFD_RELOC_C6000_SBR_GOT_U15_W: | |
3961 | if (fixP->fx_done || !seg->use_rela_p) | |
3962 | { | |
3963 | offsetT newval = md_chars_to_number (buf, 4); | |
3964 | ||
3965 | /* Constant ADDA operands, processed as constant when the | |
3966 | instruction is parsed, are encoded as-is rather than | |
3967 | shifted. If the operand of an ADDA instruction is now | |
3968 | constant (for example, the difference between two labels | |
3969 | found after the instruction), ensure it is encoded the | |
3970 | same way it would have been if the constant value had | |
3971 | been known when the instruction was parsed. */ | |
3972 | if (fixP->tc_fix_data.fix_adda && fixP->fx_done) | |
3973 | value <<= 2; | |
3974 | ||
3975 | MODIFY_VALUE (newval, value, 2, 8, 15); | |
3976 | if (value & 3) | |
3977 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3978 | _("immediate offset not 4-byte-aligned")); | |
3979 | if (value < 0 || value > 0x1fffc) | |
3980 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3981 | _("immediate offset out of range")); | |
3982 | ||
3983 | md_number_to_chars (buf, newval, 4); | |
3984 | } | |
3985 | if (fixP->fx_done && fixP->fx_r_type != BFD_RELOC_C6000_SBR_U15_W) | |
3986 | abort (); | |
3987 | break; | |
3988 | ||
3989 | case BFD_RELOC_C6000_DSBT_INDEX: | |
3990 | if (value != 0) | |
3991 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3992 | _("addend used with $DSBT_INDEX")); | |
3993 | if (fixP->fx_done) | |
3994 | abort (); | |
3995 | break; | |
3996 | ||
3997 | case BFD_RELOC_C6000_PCR_S21: | |
3998 | if (fixP->fx_done || !seg->use_rela_p) | |
3999 | { | |
4000 | offsetT newval = md_chars_to_number (buf, 4); | |
4001 | ||
4002 | MODIFY_VALUE (newval, value, 2, 7, 21); | |
4003 | ||
4004 | if (value & 3) | |
4005 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4006 | _("PC-relative offset not 4-byte-aligned")); | |
4007 | if (value < -0x400000 || value > 0x3ffffc) | |
4008 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4009 | _("PC-relative offset out of range")); | |
4010 | ||
4011 | md_number_to_chars (buf, newval, 4); | |
4012 | } | |
4013 | break; | |
4014 | ||
4015 | case BFD_RELOC_C6000_PCR_S12: | |
4016 | if (fixP->fx_done || !seg->use_rela_p) | |
4017 | { | |
4018 | offsetT newval = md_chars_to_number (buf, 4); | |
4019 | ||
4020 | MODIFY_VALUE (newval, value, 2, 16, 12); | |
4021 | ||
4022 | if (value & 3) | |
4023 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4024 | _("PC-relative offset not 4-byte-aligned")); | |
4025 | if (value < -0x2000 || value > 0x1ffc) | |
4026 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4027 | _("PC-relative offset out of range")); | |
4028 | ||
4029 | md_number_to_chars (buf, newval, 4); | |
4030 | } | |
4031 | break; | |
4032 | ||
4033 | case BFD_RELOC_C6000_PCR_S10: | |
4034 | if (fixP->fx_done || !seg->use_rela_p) | |
4035 | { | |
4036 | offsetT newval = md_chars_to_number (buf, 4); | |
4037 | ||
4038 | MODIFY_VALUE (newval, value, 2, 13, 10); | |
4039 | ||
4040 | if (value & 3) | |
4041 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4042 | _("PC-relative offset not 4-byte-aligned")); | |
4043 | if (value < -0x800 || value > 0x7fc) | |
4044 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4045 | _("PC-relative offset out of range")); | |
4046 | ||
4047 | md_number_to_chars (buf, newval, 4); | |
4048 | } | |
4049 | break; | |
4050 | ||
4051 | case BFD_RELOC_C6000_PCR_S7: | |
4052 | if (fixP->fx_done || !seg->use_rela_p) | |
4053 | { | |
4054 | offsetT newval = md_chars_to_number (buf, 4); | |
4055 | ||
4056 | MODIFY_VALUE (newval, value, 2, 16, 7); | |
4057 | ||
4058 | if (value & 3) | |
4059 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4060 | _("PC-relative offset not 4-byte-aligned")); | |
4061 | if (value < -0x100 || value > 0xfc) | |
4062 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
4063 | _("PC-relative offset out of range")); | |
4064 | ||
4065 | md_number_to_chars (buf, newval, 4); | |
4066 | } | |
4067 | break; | |
4068 | ||
1bce6bd8 PB |
4069 | case BFD_RELOC_C6000_PREL31: |
4070 | /* Force output to the object file. */ | |
4071 | fixP->fx_done = 0; | |
4072 | break; | |
4073 | ||
40b36596 JM |
4074 | default: |
4075 | abort (); | |
4076 | } | |
4077 | } | |
4078 | ||
4079 | /* Convert a floating-point number to target (IEEE) format. */ | |
4080 | ||
6d4af3c2 | 4081 | const char * |
40b36596 JM |
4082 | md_atof (int type, char *litP, int *sizeP) |
4083 | { | |
4084 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
4085 | } | |
4086 | ||
d99e5b39 JM |
4087 | /* Adjust the frags in SECTION (see tic6x_end). */ |
4088 | ||
4089 | static void | |
4090 | tic6x_adjust_section (bfd *abfd ATTRIBUTE_UNUSED, segT section, | |
4091 | void *dummy ATTRIBUTE_UNUSED) | |
4092 | { | |
4093 | segment_info_type *info; | |
4094 | frchainS *frchp; | |
4095 | fragS *fragp; | |
4096 | bfd_boolean have_code = FALSE; | |
4097 | bfd_boolean have_non_code = FALSE; | |
4098 | ||
4099 | info = seg_info (section); | |
4100 | if (info == NULL) | |
4101 | return; | |
4102 | ||
4103 | for (frchp = info->frchainP; frchp; frchp = frchp->frch_next) | |
4104 | for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next) | |
4105 | switch (fragp->fr_type) | |
4106 | { | |
4107 | case rs_machine_dependent: | |
4108 | if (fragp->tc_frag_data.is_insns) | |
4109 | have_code = TRUE; | |
4110 | break; | |
4111 | ||
4112 | case rs_dummy: | |
4113 | case rs_fill: | |
4114 | if (fragp->fr_fix > 0) | |
4115 | have_non_code = TRUE; | |
4116 | break; | |
4117 | ||
4118 | default: | |
4119 | have_non_code = TRUE; | |
4120 | break; | |
4121 | } | |
4122 | ||
4123 | /* Process alignment requirements in a code-only section. */ | |
4124 | if (have_code && !have_non_code) | |
4125 | { | |
4126 | /* If we need to insert an odd number of instructions to meet an | |
4127 | alignment requirement, there must have been an odd number of | |
4128 | instructions since the last 8-byte-aligned execute packet | |
4129 | boundary. So there must have been an execute packet with an | |
4130 | odd number (and so a number fewer than 8) of instructions | |
4131 | into which we can insert a NOP without breaking any previous | |
4132 | alignments. | |
4133 | ||
4134 | If then we need to insert a number 2 mod 4 of instructions, | |
4135 | the number of instructions since the last 16-byte-aligned | |
4136 | execute packet boundary must be 2 mod 4. So between that | |
4137 | boundary and the following 8-byte-aligned boundary there must | |
4138 | either be at least one execute packet with 2-mod-4 | |
4139 | instructions, or at least two with an odd number of | |
4140 | instructions; again, greedily inserting NOPs as soon as | |
4141 | possible suffices to meet the alignment requirement. | |
4142 | ||
4143 | If then we need to insert 4 instructions, we look between the | |
4144 | last 32-byte-aligned boundary and the following | |
4145 | 16-byte-aligned boundary. The sizes of the execute packets | |
4146 | in this range total 4 instructions mod 8, so again there is | |
4147 | room for greedy insertion of NOPs to meet the alignment | |
4148 | requirement, and before any intermediate point with 8-byte | |
4149 | (2-instruction) alignment requirement the sizes of execute | |
4150 | packets (and so the room for NOPs) will total 2 instructions | |
4151 | mod 4 so greedy insertion will not break such alignments. | |
4152 | ||
4153 | So we can always meet these alignment requirements by | |
4154 | inserting NOPs in parallel with existing execute packets, and | |
4155 | by induction the approach described above inserts the minimum | |
4156 | number of such NOPs. */ | |
4157 | ||
4158 | /* The number of NOPs we are currently looking to insert, if we | |
4159 | have gone back to insert NOPs. */ | |
4160 | unsigned int want_insert = 0; | |
4161 | ||
4162 | /* Out of that number, the number inserted so far in the current | |
4163 | stage of the above algorithm. */ | |
4164 | unsigned int want_insert_done_so_far = 0; | |
4165 | ||
4166 | /* The position mod 32 at the start of the current frag. */ | |
4167 | unsigned int pos = 0; | |
4168 | ||
4169 | /* The locations in the frag chain of the most recent frags at | |
4170 | the start of which there is the given alignment. */ | |
4171 | frchainS *frchp_last32, *frchp_last16, *frchp_last8; | |
4172 | fragS *fragp_last32, *fragp_last16, *fragp_last8; | |
4173 | unsigned int pos_last32, pos_last16, pos_last8; | |
4174 | ||
4175 | frchp_last32 = frchp_last16 = frchp_last8 = info->frchainP; | |
4176 | fragp_last32 = fragp_last16 = fragp_last8 = info->frchainP->frch_root; | |
4177 | pos_last32 = pos_last16 = pos_last8 = 0; | |
4178 | ||
4179 | for (frchp = info->frchainP; frchp; frchp = frchp->frch_next) | |
4180 | for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next) | |
4181 | look_at_frag: | |
4182 | { | |
4183 | bfd_boolean go_back = FALSE; | |
4184 | frchainS *frchp_next; | |
4185 | fragS *fragp_next; | |
4186 | ||
4187 | if (fragp->fr_type != rs_machine_dependent) | |
4188 | continue; | |
4189 | ||
4190 | if (fragp->tc_frag_data.is_insns | |
4191 | && pos + fragp->fr_fix > 32 | |
4192 | && !fragp->tc_frag_data.can_cross_fp_boundary) | |
4193 | { | |
4194 | /* As described above, we should always have met an | |
4195 | alignment requirement by the time we come back to | |
4196 | it. */ | |
4197 | if (want_insert) | |
4198 | abort (); | |
4199 | ||
4200 | if (pos & 3) | |
4201 | abort (); | |
4202 | want_insert = (32 - pos) >> 2; | |
4203 | if (want_insert > 7) | |
4204 | abort (); | |
4205 | want_insert_done_so_far = 0; | |
4206 | go_back = TRUE; | |
4207 | } | |
4208 | ||
4209 | if (!fragp->tc_frag_data.is_insns) | |
4210 | { | |
4211 | unsigned int would_insert_bytes; | |
4212 | ||
4213 | if (!(pos & ((1 << fragp->fr_offset) - 1))) | |
4214 | /* This alignment requirement is already met. */ | |
4215 | continue; | |
4216 | ||
4217 | /* As described above, we should always have met an | |
4218 | alignment requirement by the time we come back to | |
4219 | it. */ | |
4220 | if (want_insert) | |
4221 | abort (); | |
4222 | ||
4223 | /* We may not be able to meet this requirement within | |
4224 | the given number of characters. */ | |
4225 | would_insert_bytes | |
4226 | = ((1 << fragp->fr_offset) | |
4227 | - (pos & ((1 << fragp->fr_offset) - 1))); | |
4228 | ||
4229 | if (fragp->fr_subtype != 0 | |
4230 | && would_insert_bytes > fragp->fr_subtype) | |
4231 | continue; | |
4232 | ||
4233 | /* An unmet alignment must be 8, 16 or 32 bytes; | |
4234 | smaller ones must always be met within code-only | |
4235 | sections and larger ones cause the section not to | |
4236 | be code-only. */ | |
4237 | if (fragp->fr_offset != 3 | |
4238 | && fragp->fr_offset != 4 | |
4239 | && fragp->fr_offset != 5) | |
4240 | abort (); | |
4241 | ||
4242 | if (would_insert_bytes & 3) | |
4243 | abort (); | |
4244 | want_insert = would_insert_bytes >> 2; | |
4245 | if (want_insert > 7) | |
4246 | abort (); | |
4247 | want_insert_done_so_far = 0; | |
4248 | go_back = TRUE; | |
4249 | } | |
4250 | else if (want_insert && !go_back) | |
4251 | { | |
4252 | unsigned int num_insns = fragp->fr_fix >> 2; | |
4253 | unsigned int max_poss_nops = 8 - num_insns; | |
4254 | ||
4255 | if (max_poss_nops) | |
4256 | { | |
4257 | unsigned int cur_want_nops, max_want_nops, do_nops, i; | |
4258 | ||
4259 | if (want_insert & 1) | |
4260 | cur_want_nops = 1; | |
4261 | else if (want_insert & 2) | |
4262 | cur_want_nops = 2; | |
4263 | else if (want_insert & 4) | |
4264 | cur_want_nops = 4; | |
4265 | else | |
4266 | abort (); | |
4267 | ||
4268 | max_want_nops = cur_want_nops - want_insert_done_so_far; | |
4269 | ||
4270 | do_nops = (max_poss_nops < max_want_nops | |
4271 | ? max_poss_nops | |
4272 | : max_want_nops); | |
4273 | for (i = 0; i < do_nops; i++) | |
4274 | { | |
4275 | md_number_to_chars (fragp->fr_literal + fragp->fr_fix, | |
4276 | 0, 4); | |
4277 | if (target_big_endian) | |
4278 | fragp->fr_literal[fragp->fr_fix - 1] |= 0x1; | |
4279 | else | |
4280 | fragp->fr_literal[fragp->fr_fix - 4] |= 0x1; | |
4281 | fragp->fr_fix += 4; | |
4282 | fragp->fr_var -= 4; | |
4283 | } | |
4284 | want_insert_done_so_far += do_nops; | |
4285 | if (want_insert_done_so_far == cur_want_nops) | |
4286 | { | |
4287 | want_insert -= want_insert_done_so_far; | |
4288 | want_insert_done_so_far = 0; | |
4289 | if (want_insert) | |
4290 | go_back = TRUE; | |
4291 | } | |
4292 | } | |
4293 | } | |
4294 | if (go_back) | |
4295 | { | |
4296 | if (want_insert & 1) | |
4297 | { | |
4298 | frchp = frchp_last8; | |
4299 | fragp = fragp_last8; | |
4300 | pos = pos_last8; | |
4301 | } | |
4302 | else if (want_insert & 2) | |
4303 | { | |
4304 | frchp = frchp_last8 = frchp_last16; | |
4305 | fragp = fragp_last8 = fragp_last16; | |
4306 | pos = pos_last8 = pos_last16; | |
4307 | } | |
4308 | else if (want_insert & 4) | |
4309 | { | |
4310 | frchp = frchp_last8 = frchp_last16 = frchp_last32; | |
4311 | fragp = fragp_last8 = fragp_last16 = fragp_last32; | |
4312 | pos = pos_last8 = pos_last16 = pos_last32; | |
4313 | } | |
4314 | else | |
4315 | abort (); | |
4316 | ||
4317 | goto look_at_frag; | |
4318 | } | |
4319 | ||
4320 | /* Update current position for moving past a code | |
4321 | frag. */ | |
4322 | pos += fragp->fr_fix; | |
4323 | pos &= 31; | |
4324 | frchp_next = frchp; | |
4325 | fragp_next = fragp->fr_next; | |
4326 | if (fragp_next == NULL) | |
4327 | { | |
4328 | frchp_next = frchp->frch_next; | |
4329 | if (frchp_next != NULL) | |
4330 | fragp_next = frchp_next->frch_root; | |
4331 | } | |
4332 | if (!(pos & 7)) | |
4333 | { | |
4334 | frchp_last8 = frchp_next; | |
4335 | fragp_last8 = fragp_next; | |
4336 | pos_last8 = pos; | |
4337 | } | |
4338 | if (!(pos & 15)) | |
4339 | { | |
4340 | frchp_last16 = frchp_next; | |
4341 | fragp_last16 = fragp_next; | |
4342 | pos_last16 = pos; | |
4343 | } | |
4344 | if (!(pos & 31)) | |
4345 | { | |
4346 | frchp_last32 = frchp_next; | |
4347 | fragp_last32 = fragp_next; | |
4348 | pos_last32 = pos; | |
4349 | } | |
4350 | } | |
4351 | } | |
4352 | ||
4353 | /* Now convert the machine-dependent frags to machine-independent | |
4354 | ones. */ | |
4355 | for (frchp = info->frchainP; frchp; frchp = frchp->frch_next) | |
4356 | for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next) | |
4357 | { | |
4358 | if (fragp->fr_type == rs_machine_dependent) | |
4359 | { | |
4360 | if (fragp->tc_frag_data.is_insns) | |
4361 | frag_wane (fragp); | |
4362 | else | |
4363 | { | |
4364 | fragp->fr_type = rs_align_code; | |
4365 | fragp->fr_var = 1; | |
4366 | *fragp->fr_literal = 0; | |
4367 | } | |
4368 | } | |
4369 | } | |
4370 | } | |
4371 | ||
4372 | /* Initialize the machine-dependent parts of a frag. */ | |
4373 | ||
4374 | void | |
4375 | tic6x_frag_init (fragS *fragp) | |
4376 | { | |
4377 | fragp->tc_frag_data.is_insns = FALSE; | |
4378 | fragp->tc_frag_data.can_cross_fp_boundary = FALSE; | |
4379 | } | |
4380 | ||
59e6276b JM |
4381 | /* Set an attribute if it has not already been set by the user. */ |
4382 | ||
4383 | static void | |
4384 | tic6x_set_attribute_int (int tag, int value) | |
4385 | { | |
4386 | if (tag < 1 | |
4387 | || tag >= NUM_KNOWN_OBJ_ATTRIBUTES) | |
4388 | abort (); | |
4389 | if (!tic6x_attributes_set_explicitly[tag]) | |
4390 | bfd_elf_add_proc_attr_int (stdoutput, tag, value); | |
4391 | } | |
4392 | ||
4393 | /* Set object attributes deduced from the input file and command line | |
4394 | rather than given explicitly. */ | |
4395 | static void | |
4396 | tic6x_set_attributes (void) | |
4397 | { | |
75fa6dc1 JM |
4398 | if (tic6x_arch_attribute == C6XABI_Tag_ISA_none) |
4399 | tic6x_arch_attribute = C6XABI_Tag_ISA_C674X; | |
59e6276b | 4400 | |
75fa6dc1 | 4401 | tic6x_set_attribute_int (Tag_ISA, tic6x_arch_attribute); |
b5593623 | 4402 | tic6x_set_attribute_int (Tag_ABI_DSBT, tic6x_dsbt); |
87779176 JM |
4403 | tic6x_set_attribute_int (Tag_ABI_PID, tic6x_pid); |
4404 | tic6x_set_attribute_int (Tag_ABI_PIC, tic6x_pic); | |
59e6276b JM |
4405 | } |
4406 | ||
d99e5b39 JM |
4407 | /* Do machine-dependent manipulations of the frag chains after all |
4408 | input has been read and before the machine-independent sizing and | |
4409 | relaxing. */ | |
4410 | ||
4411 | void | |
4412 | tic6x_end (void) | |
4413 | { | |
59e6276b JM |
4414 | /* Set object attributes at this point if not explicitly set. */ |
4415 | tic6x_set_attributes (); | |
4416 | ||
d99e5b39 JM |
4417 | /* Meeting alignment requirements may require inserting NOPs in |
4418 | parallel in execute packets earlier in the segment. Future | |
4419 | 16-bit instruction generation involves whole-segment optimization | |
4420 | to determine the best choice and ordering of 32-bit or 16-bit | |
4421 | instructions. This doesn't fit will in the general relaxation | |
4422 | framework, so handle alignment and 16-bit instruction generation | |
4423 | here. */ | |
4424 | bfd_map_over_sections (stdoutput, tic6x_adjust_section, NULL); | |
4425 | } | |
4426 | ||
4427 | /* No machine-dependent frags at this stage; all converted in | |
4428 | tic6x_end. */ | |
40b36596 JM |
4429 | |
4430 | void | |
4431 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec ATTRIBUTE_UNUSED, | |
4432 | fragS *fragp ATTRIBUTE_UNUSED) | |
4433 | { | |
4434 | abort (); | |
4435 | } | |
4436 | ||
d99e5b39 JM |
4437 | /* No machine-dependent frags at this stage; all converted in |
4438 | tic6x_end. */ | |
40b36596 JM |
4439 | |
4440 | int | |
4441 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, | |
4442 | segT seg ATTRIBUTE_UNUSED) | |
4443 | { | |
4444 | abort (); | |
4445 | } | |
4446 | ||
4447 | /* Put a number into target byte order. */ | |
4448 | ||
4449 | void | |
4450 | md_number_to_chars (char *buf, valueT val, int n) | |
4451 | { | |
4452 | if (target_big_endian) | |
4453 | number_to_chars_bigendian (buf, val, n); | |
4454 | else | |
4455 | number_to_chars_littleendian (buf, val, n); | |
4456 | } | |
4457 | ||
4458 | /* Machine-dependent operand parsing not currently needed. */ | |
4459 | ||
4460 | void | |
4461 | md_operand (expressionS *op ATTRIBUTE_UNUSED) | |
4462 | { | |
4463 | } | |
4464 | ||
4465 | /* PC-relative operands are relative to the start of the fetch | |
4466 | packet. */ | |
4467 | ||
4468 | long | |
41820509 | 4469 | tic6x_pcrel_from_section (fixS *fixp, segT sec) |
40b36596 | 4470 | { |
41820509 JM |
4471 | if (fixp->fx_addsy != NULL |
4472 | && (!S_IS_DEFINED (fixp->fx_addsy) | |
4473 | || S_GET_SEGMENT (fixp->fx_addsy) != sec)) | |
4474 | return 0; | |
40b36596 JM |
4475 | return (fixp->fx_where + fixp->fx_frag->fr_address) & ~(long) 0x1f; |
4476 | } | |
4477 | ||
4478 | /* Round up a section size to the appropriate boundary. */ | |
4479 | ||
4480 | valueT | |
4481 | md_section_align (segT segment ATTRIBUTE_UNUSED, | |
4482 | valueT size) | |
4483 | { | |
4484 | /* Round up section sizes to ensure that text sections consist of | |
4485 | whole fetch packets. */ | |
4486 | int align = bfd_get_section_alignment (stdoutput, segment); | |
8d3842cd | 4487 | return ((size + (1 << align) - 1) & (-((valueT) 1 << align))); |
40b36596 JM |
4488 | } |
4489 | ||
4490 | /* No special undefined symbol handling needed for now. */ | |
4491 | ||
4492 | symbolS * | |
4493 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
4494 | { | |
4495 | return NULL; | |
4496 | } | |
4497 | ||
4498 | /* Translate internal representation of relocation info to BFD target | |
4499 | format. */ | |
4500 | ||
4501 | arelent * | |
4502 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) | |
4503 | { | |
4504 | arelent *reloc; | |
ac145307 | 4505 | asymbol *symbol; |
40b36596 JM |
4506 | bfd_reloc_code_real_type r_type; |
4507 | ||
4508 | reloc = xmalloc (sizeof (arelent)); | |
4509 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
ac145307 BS |
4510 | symbol = symbol_get_bfdsym (fixp->fx_addsy); |
4511 | *reloc->sym_ptr_ptr = symbol; | |
40b36596 | 4512 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
41820509 | 4513 | reloc->addend = (tic6x_generate_rela ? fixp->fx_offset : 0); |
40b36596 JM |
4514 | r_type = fixp->fx_r_type; |
4515 | reloc->howto = bfd_reloc_type_lookup (stdoutput, r_type); | |
4516 | ||
4517 | if (reloc->howto == NULL) | |
4518 | { | |
4519 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
4520 | _("Cannot represent relocation type %s"), | |
4521 | bfd_get_reloc_code_name (r_type)); | |
4522 | return NULL; | |
4523 | } | |
4524 | ||
41820509 JM |
4525 | /* Correct for adjustments bfd_install_relocation will make. */ |
4526 | if (reloc->howto->pcrel_offset && reloc->howto->partial_inplace) | |
ac145307 BS |
4527 | { |
4528 | reloc->addend += reloc->address; | |
4529 | if (!bfd_is_com_section (symbol)) | |
4530 | reloc->addend -= symbol->value; | |
4531 | } | |
4a732032 BS |
4532 | if (r_type == BFD_RELOC_C6000_PCR_H16 |
4533 | || r_type == BFD_RELOC_C6000_PCR_L16) | |
4534 | { | |
4535 | symbolS *t = fixp->tc_fix_data.fix_subsy; | |
4536 | segT sub_symbol_segment; | |
4537 | ||
4538 | resolve_symbol_value (t); | |
4539 | sub_symbol_segment = S_GET_SEGMENT (t); | |
4540 | if (sub_symbol_segment == undefined_section) | |
4541 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
4542 | _("undefined symbol %s in PCR relocation"), | |
4543 | S_GET_NAME (t)); | |
4544 | else | |
4545 | { | |
4546 | reloc->addend = reloc->address & ~0x1F; | |
4547 | reloc->addend -= S_GET_VALUE (t); | |
4548 | } | |
4549 | } | |
40b36596 JM |
4550 | return reloc; |
4551 | } | |
1bce6bd8 PB |
4552 | |
4553 | /* Convert REGNAME to a DWARF-2 register number. */ | |
4554 | ||
4555 | int | |
4556 | tic6x_regname_to_dw2regnum (char *regname) | |
4557 | { | |
4558 | bfd_boolean reg_ok; | |
4559 | tic6x_register reg; | |
4560 | char *rq = regname; | |
4561 | ||
4562 | reg_ok = tic6x_parse_register (&rq, ®); | |
4563 | ||
4564 | if (!reg_ok) | |
4565 | return -1; | |
4566 | ||
4567 | switch (reg.side) | |
4568 | { | |
4569 | case 1: /* A regs. */ | |
4570 | if (reg.num < 16) | |
4571 | return reg.num; | |
4572 | else if (reg.num < 32) | |
4573 | return (reg.num - 16) + 37; | |
4574 | else | |
4575 | return -1; | |
4576 | ||
4577 | case 2: /* B regs. */ | |
4578 | if (reg.num < 16) | |
4579 | return reg.num + 16; | |
4580 | else if (reg.num < 32) | |
4581 | return (reg.num - 16) + 53; | |
4582 | else | |
4583 | return -1; | |
4584 | ||
4585 | default: | |
4586 | return -1; | |
4587 | } | |
4588 | } | |
4589 | ||
4590 | /* Initialize the DWARF-2 unwind information for this procedure. */ | |
4591 | ||
4592 | void | |
4593 | tic6x_frame_initial_instructions (void) | |
4594 | { | |
4595 | /* CFA is initial stack pointer (B15). */ | |
4596 | cfi_add_CFA_def_cfa (31, 0); | |
4597 | } | |
4598 | ||
4599 | /* Start an exception table entry. If idx is nonzero this is an index table | |
4600 | entry. */ | |
4601 | ||
4602 | static void | |
4603 | tic6x_start_unwind_section (const segT text_seg, int idx) | |
4604 | { | |
4605 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4606 | const char * text_name; | |
4607 | const char * prefix; | |
4608 | const char * prefix_once; | |
4609 | const char * group_name; | |
4610 | size_t prefix_len; | |
4611 | size_t text_len; | |
4612 | char * sec_name; | |
4613 | size_t sec_name_len; | |
4614 | int type; | |
4615 | int flags; | |
4616 | int linkonce; | |
4617 | ||
4618 | if (idx) | |
4619 | { | |
4620 | prefix = ELF_STRING_C6000_unwind; | |
4621 | prefix_once = ELF_STRING_C6000_unwind_once; | |
4622 | type = SHT_C6000_UNWIND; | |
4623 | } | |
4624 | else | |
4625 | { | |
4626 | prefix = ELF_STRING_C6000_unwind_info; | |
4627 | prefix_once = ELF_STRING_C6000_unwind_info_once; | |
4628 | type = SHT_PROGBITS; | |
4629 | } | |
4630 | ||
4631 | text_name = segment_name (text_seg); | |
4632 | if (streq (text_name, ".text")) | |
4633 | text_name = ""; | |
4634 | ||
4635 | if (strncmp (text_name, ".gnu.linkonce.t.", | |
4636 | strlen (".gnu.linkonce.t.")) == 0) | |
4637 | { | |
4638 | prefix = prefix_once; | |
4639 | text_name += strlen (".gnu.linkonce.t."); | |
4640 | } | |
4641 | ||
4642 | prefix_len = strlen (prefix); | |
4643 | text_len = strlen (text_name); | |
4644 | sec_name_len = prefix_len + text_len; | |
4645 | sec_name = (char *) xmalloc (sec_name_len + 1); | |
4646 | memcpy (sec_name, prefix, prefix_len); | |
4647 | memcpy (sec_name + prefix_len, text_name, text_len); | |
4648 | sec_name[prefix_len + text_len] = '\0'; | |
4649 | ||
4650 | flags = SHF_ALLOC; | |
4651 | linkonce = 0; | |
4652 | group_name = 0; | |
4653 | ||
4654 | /* Handle COMDAT group. */ | |
4655 | if (prefix != prefix_once && (text_seg->flags & SEC_LINK_ONCE) != 0) | |
4656 | { | |
4657 | group_name = elf_group_name (text_seg); | |
4658 | if (group_name == NULL) | |
4659 | { | |
4660 | as_bad (_("group section `%s' has no group signature"), | |
4661 | segment_name (text_seg)); | |
4662 | ignore_rest_of_line (); | |
4663 | return; | |
4664 | } | |
4665 | flags |= SHF_GROUP; | |
4666 | linkonce = 1; | |
4667 | } | |
4668 | ||
4669 | obj_elf_change_section (sec_name, type, flags, 0, group_name, linkonce, 0); | |
4670 | ||
4671 | /* Set the section link for index tables. */ | |
4672 | if (idx) | |
4673 | elf_linked_to_section (now_seg) = text_seg; | |
4674 | ||
4675 | seg_info (now_seg)->tc_segment_info_data.text_unwind = unwind; | |
4676 | } | |
4677 | ||
4678 | ||
4679 | static const int | |
3739860c | 4680 | tic6x_unwind_frame_regs[TIC6X_NUM_UNWIND_REGS] = |
1bce6bd8 PB |
4681 | /* A15 B15 B14 B13 B12 B11 B10 B3 A14 A13 A12 A11 A10. */ |
4682 | { 15, 31, 30, 29, 28, 27, 26, 19, 14, 13, 12, 11, 10 }; | |
4683 | ||
4684 | /* Register save offsets for __c6xabi_push_rts. */ | |
4685 | static const int | |
3739860c | 4686 | tic6x_pop_rts_offset_little[TIC6X_NUM_UNWIND_REGS] = |
1bce6bd8 PB |
4687 | /* A15 B15 B14 B13 B12 B11 B10 B3 A14 A13 A12 A11 A10. */ |
4688 | { -1, 1, 0, -3, -4, -7, -8,-11, -2, -5, -6, -9,-10}; | |
4689 | ||
4690 | static const int | |
3739860c | 4691 | tic6x_pop_rts_offset_big[TIC6X_NUM_UNWIND_REGS] = |
1bce6bd8 PB |
4692 | /* A15 B15 B14 B13 B12 B11 B10 B3 A14 A13 A12 A11 A10. */ |
4693 | { -2, 1, 0, -4, -3, -8, -7,-12, -1, -6, -5,-10, -9}; | |
4694 | ||
4695 | /* Map from dwarf register number to unwind frame register number. */ | |
4696 | static int | |
4697 | tic6x_unwind_reg_from_dwarf (int dwarf) | |
4698 | { | |
4699 | int reg; | |
4700 | ||
4701 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
4702 | { | |
4703 | if (tic6x_unwind_frame_regs[reg] == dwarf) | |
4704 | return reg; | |
4705 | } | |
4706 | ||
4707 | return -1; | |
4708 | } | |
4709 | ||
4710 | /* Unwinding bytecode definitions. */ | |
4711 | #define UNWIND_OP_ADD_SP 0x00 | |
4712 | #define UNWIND_OP_ADD_SP2 0xd2 | |
4713 | #define UNWIND_OP2_POP 0x8000 | |
4714 | #define UNWIND_OP2_POP_COMPACT 0xa000 | |
4715 | #define UNWIND_OP_POP_REG 0xc0 | |
4716 | #define UNWIND_OP_MV_FP 0xd0 | |
4717 | #define UNWIND_OP_POP_RTS 0xd1 | |
4718 | #define UNWIND_OP_RET 0xe0 | |
4719 | ||
4720 | /* Maximum stack adjustment for __c6xabi_unwind_cpp_pr3/4 */ | |
4721 | #define MAX_COMPACT_SP_OFFSET (0x7f << 3) | |
4722 | ||
4723 | static void | |
4724 | tic6x_flush_unwind_word (valueT data) | |
4725 | { | |
4726 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4727 | char *ptr; | |
4728 | ||
4729 | /* Create EXTAB entry if it does not exist. */ | |
4730 | if (unwind->table_entry == NULL) | |
4731 | { | |
4732 | tic6x_start_unwind_section (unwind->saved_seg, 0); | |
4733 | frag_align (2, 0, 0); | |
4734 | record_alignment (now_seg, 2); | |
4735 | unwind->table_entry = expr_build_dot (); | |
4736 | ptr = frag_more (4); | |
4737 | unwind->frag_start = ptr; | |
4738 | } | |
4739 | else | |
4740 | { | |
4741 | /* Append additional word of data. */ | |
4742 | ptr = frag_more (4); | |
4743 | } | |
4744 | ||
4745 | md_number_to_chars (ptr, data, 4); | |
4746 | } | |
4747 | ||
4748 | /* Add a single byte of unwinding data. */ | |
4749 | ||
4750 | static void | |
4751 | tic6x_unwind_byte (int byte) | |
4752 | { | |
4753 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4754 | ||
4755 | unwind->data_bytes++; | |
4756 | /* Only flush the first word after we know multiple words are required. */ | |
4757 | if (unwind->data_bytes == 5) | |
4758 | { | |
4759 | if (unwind->personality_index == -1) | |
4760 | { | |
4761 | /* At this point we know we are too big for pr0. */ | |
4762 | unwind->personality_index = 1; | |
4763 | tic6x_flush_unwind_word (0x81000000 | ((unwind->data >> 8) & 0xffff)); | |
4764 | unwind->data = ((unwind->data & 0xff) << 8) | byte; | |
4765 | unwind->data_bytes++; | |
4766 | } | |
4767 | else | |
4768 | { | |
4769 | tic6x_flush_unwind_word (unwind->data); | |
4770 | unwind->data = byte; | |
4771 | } | |
4772 | } | |
4773 | else | |
4774 | { | |
4775 | unwind->data = (unwind->data << 8) | byte; | |
4776 | if ((unwind->data_bytes & 3) == 0 && unwind->data_bytes > 4) | |
4777 | { | |
4778 | tic6x_flush_unwind_word (unwind->data); | |
4779 | unwind->data = 0; | |
4780 | } | |
4781 | } | |
4782 | } | |
4783 | ||
4784 | /* Add a two-byte unwinding opcode. */ | |
4785 | static void | |
4786 | tic6x_unwind_2byte (int bytes) | |
4787 | { | |
4788 | tic6x_unwind_byte (bytes >> 8); | |
4789 | tic6x_unwind_byte (bytes & 0xff); | |
4790 | } | |
4791 | ||
4792 | static void | |
4793 | tic6x_unwind_uleb (offsetT offset) | |
4794 | { | |
4795 | while (offset > 0x7f) | |
4796 | { | |
4797 | tic6x_unwind_byte ((offset & 0x7f) | 0x80); | |
4798 | offset >>= 7; | |
4799 | } | |
4800 | tic6x_unwind_byte (offset); | |
4801 | } | |
4802 | ||
4803 | void | |
4804 | tic6x_cfi_startproc (void) | |
4805 | { | |
4806 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4807 | ||
4808 | unwind->personality_index = -1; | |
4809 | unwind->personality_routine = NULL; | |
4810 | if (unwind->table_entry) | |
4811 | as_bad (_("missing .endp before .cfi_startproc")); | |
4812 | ||
4813 | unwind->table_entry = NULL; | |
4814 | unwind->data_bytes = -1; | |
4815 | } | |
4816 | ||
4817 | static void | |
4818 | tic6x_output_exidx_entry (void) | |
4819 | { | |
4820 | char *ptr; | |
4821 | long where; | |
4822 | unsigned int marked_pr_dependency; | |
4823 | segT old_seg; | |
4824 | subsegT old_subseg; | |
4825 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4826 | ||
4827 | old_seg = now_seg; | |
4828 | old_subseg = now_subseg; | |
4829 | ||
4830 | /* Add index table entry. This is two words. */ | |
4831 | tic6x_start_unwind_section (unwind->saved_seg, 1); | |
4832 | frag_align (2, 0, 0); | |
4833 | record_alignment (now_seg, 2); | |
4834 | ||
4835 | ptr = frag_more (8); | |
7e9def1e | 4836 | memset (ptr, 0, 8); |
1bce6bd8 PB |
4837 | where = frag_now_fix () - 8; |
4838 | ||
4839 | /* Self relative offset of the function start. */ | |
4840 | fix_new (frag_now, where, 4, unwind->function_start, 0, 1, | |
4841 | BFD_RELOC_C6000_PREL31); | |
4842 | ||
4843 | /* Indicate dependency on ABI-defined personality routines to the | |
4844 | linker, if it hasn't been done already. */ | |
4845 | marked_pr_dependency | |
4846 | = seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency; | |
4847 | if (unwind->personality_index >= 0 && unwind->personality_index < 5 | |
4848 | && !(marked_pr_dependency & (1 << unwind->personality_index))) | |
4849 | { | |
4850 | static const char *const name[] = | |
4851 | { | |
4852 | "__c6xabi_unwind_cpp_pr0", | |
4853 | "__c6xabi_unwind_cpp_pr1", | |
4854 | "__c6xabi_unwind_cpp_pr2", | |
4855 | "__c6xabi_unwind_cpp_pr3", | |
4856 | "__c6xabi_unwind_cpp_pr4" | |
4857 | }; | |
4858 | symbolS *pr = symbol_find_or_make (name[unwind->personality_index]); | |
4859 | fix_new (frag_now, where, 0, pr, 0, 1, BFD_RELOC_NONE); | |
4860 | seg_info (now_seg)->tc_segment_info_data.marked_pr_dependency | |
4861 | |= 1 << unwind->personality_index; | |
4862 | } | |
4863 | ||
4864 | if (unwind->table_entry) | |
4865 | { | |
4866 | /* Self relative offset of the table entry. */ | |
4867 | fix_new (frag_now, where + 4, 4, unwind->table_entry, 0, 1, | |
4868 | BFD_RELOC_C6000_PREL31); | |
4869 | } | |
4870 | else | |
4871 | { | |
4872 | /* Inline exception table entry. */ | |
4873 | md_number_to_chars (ptr + 4, unwind->data, 4); | |
4874 | } | |
4875 | ||
4876 | /* Restore the original section. */ | |
4877 | subseg_set (old_seg, old_subseg); | |
4878 | } | |
4879 | ||
4880 | static void | |
4881 | tic6x_output_unwinding (bfd_boolean need_extab) | |
4882 | { | |
4883 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
4884 | unsigned safe_mask = unwind->safe_mask; | |
4885 | unsigned compact_mask = unwind->compact_mask; | |
4886 | unsigned reg_saved_mask = unwind->reg_saved_mask; | |
4887 | offsetT cfa_offset = unwind->cfa_offset; | |
4888 | long where; | |
4889 | int reg; | |
4890 | ||
4891 | if (unwind->personality_index == -2) | |
4892 | { | |
4893 | /* Function can not be unwound. */ | |
4894 | unwind->data = 1; | |
4895 | tic6x_output_exidx_entry (); | |
4896 | return; | |
4897 | } | |
4898 | ||
4899 | if (unwind->personality_index == -1 && unwind->personality_routine == NULL) | |
4900 | { | |
4901 | /* Auto-select a personality routine if none specified. */ | |
4902 | if (reg_saved_mask || cfa_offset >= MAX_COMPACT_SP_OFFSET) | |
4903 | unwind->personality_index = -1; | |
4904 | else if (safe_mask) | |
4905 | unwind->personality_index = 3; | |
4906 | else | |
4907 | unwind->personality_index = 4; | |
4908 | } | |
4909 | ||
4910 | /* Calculate unwinding opcodes, and emit to EXTAB if necessary. */ | |
4911 | unwind->table_entry = NULL; | |
4912 | if (unwind->personality_index == 3 || unwind->personality_index == 4) | |
4913 | { | |
4914 | if (cfa_offset >= MAX_COMPACT_SP_OFFSET) | |
4915 | { | |
4916 | as_bad (_("stack pointer offset too large for personality routine")); | |
4917 | return; | |
4918 | } | |
4919 | if (reg_saved_mask | |
4920 | || (unwind->personality_index == 3 && compact_mask != 0) | |
4921 | || (unwind->personality_index == 4 && safe_mask != 0)) | |
4922 | { | |
4923 | as_bad (_("stack frame layout does not match personality routine")); | |
4924 | return; | |
4925 | } | |
4926 | ||
4927 | unwind->data = (1u << 31) | (unwind->personality_index << 24); | |
4928 | if (unwind->cfa_reg == 15) | |
4929 | unwind->data |= 0x7f << 17; | |
4930 | else | |
4931 | unwind->data |= cfa_offset << (17 - 3); | |
4932 | ||
4933 | if (unwind->personality_index == 3) | |
4934 | unwind->data |= safe_mask << 4; | |
4935 | else | |
4936 | unwind->data |= compact_mask << 4; | |
4937 | unwind->data |= unwind->return_reg; | |
4938 | unwind->data_bytes = 4; | |
4939 | } | |
4940 | else | |
4941 | { | |
4942 | if (unwind->personality_routine) | |
4943 | { | |
4944 | unwind->data = 0; | |
4945 | unwind->data_bytes = 5; | |
4946 | tic6x_flush_unwind_word (0); | |
4947 | /* First word is personality routine. */ | |
4948 | where = frag_now_fix () - 4; | |
4949 | fix_new (frag_now, where, 4, unwind->personality_routine, 0, 1, | |
4950 | BFD_RELOC_C6000_PREL31); | |
4951 | } | |
4952 | else if (unwind->personality_index > 0) | |
4953 | { | |
4954 | unwind->data = 0x8000 | (unwind->personality_index << 8); | |
4955 | unwind->data_bytes = 2; | |
4956 | } | |
4957 | else /* pr0 or undecided */ | |
4958 | { | |
4959 | unwind->data = 0x80; | |
4960 | unwind->data_bytes = 1; | |
4961 | } | |
4962 | ||
4963 | if (unwind->return_reg != UNWIND_B3) | |
4964 | { | |
4965 | tic6x_unwind_byte (UNWIND_OP_RET | unwind->return_reg); | |
4966 | } | |
4967 | ||
4968 | if (unwind->cfa_reg == 15) | |
4969 | { | |
4970 | tic6x_unwind_byte (UNWIND_OP_MV_FP); | |
4971 | } | |
4972 | else if (cfa_offset != 0) | |
4973 | { | |
4974 | cfa_offset >>= 3; | |
4975 | if (cfa_offset > 0x80) | |
4976 | { | |
4977 | tic6x_unwind_byte (UNWIND_OP_ADD_SP2); | |
4978 | tic6x_unwind_uleb (cfa_offset - 0x81); | |
4979 | } | |
4980 | else if (cfa_offset > 0x40) | |
4981 | { | |
4982 | tic6x_unwind_byte (UNWIND_OP_ADD_SP | 0x3f); | |
4983 | tic6x_unwind_byte (UNWIND_OP_ADD_SP | (cfa_offset - 0x40)); | |
4984 | } | |
4985 | else | |
4986 | { | |
4987 | tic6x_unwind_byte (UNWIND_OP_ADD_SP | (cfa_offset - 1)); | |
4988 | } | |
4989 | } | |
4990 | ||
4991 | if (safe_mask) | |
4992 | tic6x_unwind_2byte (UNWIND_OP2_POP | unwind->safe_mask); | |
4993 | else if (unwind->pop_rts) | |
4994 | tic6x_unwind_byte (UNWIND_OP_POP_RTS); | |
4995 | else if (compact_mask) | |
4996 | tic6x_unwind_2byte (UNWIND_OP2_POP_COMPACT | unwind->compact_mask); | |
4997 | else if (reg_saved_mask) | |
4998 | { | |
4999 | offsetT cur_offset; | |
5000 | int val; | |
5001 | int last_val; | |
5002 | ||
5003 | tic6x_unwind_byte (UNWIND_OP_POP_REG | unwind->saved_reg_count); | |
5004 | last_val = 0; | |
5005 | for (cur_offset = 0; unwind->saved_reg_count > 0; cur_offset -= 4) | |
5006 | { | |
5007 | val = 0xf; | |
5008 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5009 | { | |
5010 | if (!unwind->reg_saved[reg]) | |
5011 | continue; | |
5012 | ||
5013 | if (unwind->reg_offset[reg] == cur_offset) | |
5014 | { | |
5015 | unwind->saved_reg_count--; | |
5016 | val = reg; | |
5017 | break; | |
5018 | } | |
5019 | } | |
5020 | if ((cur_offset & 4) == 4) | |
5021 | tic6x_unwind_byte ((last_val << 4) | val); | |
5022 | else | |
5023 | last_val = val; | |
5024 | } | |
5025 | if ((cur_offset & 4) == 4) | |
5026 | tic6x_unwind_byte ((last_val << 4) | 0xf); | |
5027 | } | |
5028 | ||
5029 | /* Pad with RETURN opcodes. */ | |
5030 | while ((unwind->data_bytes & 3) != 0) | |
5031 | tic6x_unwind_byte (UNWIND_OP_RET | UNWIND_B3); | |
5032 | ||
5033 | if (unwind->personality_index == -1 && unwind->personality_routine == NULL) | |
5034 | unwind->personality_index = 0; | |
5035 | } | |
5036 | ||
5037 | /* Force creation of an EXTAB entry if an LSDA is required. */ | |
5038 | if (need_extab && !unwind->table_entry) | |
5039 | { | |
5040 | if (unwind->data_bytes != 4) | |
5041 | abort (); | |
5042 | ||
5043 | tic6x_flush_unwind_word (unwind->data); | |
5044 | } | |
5045 | else if (unwind->table_entry && !need_extab) | |
5046 | { | |
5047 | /* Add an empty descriptor if there is no user-specified data. */ | |
5048 | char *ptr = frag_more (4); | |
5049 | md_number_to_chars (ptr, 0, 4); | |
5050 | } | |
5051 | ||
5052 | /* Fill in length of unwinding bytecode. */ | |
5053 | if (unwind->table_entry) | |
5054 | { | |
5055 | valueT tmp; | |
5056 | if (unwind->data_bytes > 0x400) | |
5057 | as_bad (_("too many unwinding instructions")); | |
5058 | ||
5059 | if (unwind->personality_index == -1) | |
5060 | { | |
5061 | tmp = md_chars_to_number (unwind->frag_start + 4, 4); | |
5062 | tmp |= ((unwind->data_bytes - 8) >> 2) << 24; | |
5063 | md_number_to_chars (unwind->frag_start + 4, tmp, 4); | |
5064 | } | |
5065 | else if (unwind->personality_index == 1 || unwind->personality_index == 2) | |
5066 | { | |
5067 | tmp = md_chars_to_number (unwind->frag_start, 4); | |
5068 | tmp |= ((unwind->data_bytes - 4) >> 2) << 16; | |
5069 | md_number_to_chars (unwind->frag_start, tmp, 4); | |
5070 | } | |
5071 | } | |
5072 | tic6x_output_exidx_entry (); | |
5073 | } | |
5074 | ||
5075 | /* FIXME: This will get horribly confused if cfi directives are emitted for | |
5076 | function epilogue. */ | |
5077 | void | |
5078 | tic6x_cfi_endproc (struct fde_entry *fde) | |
5079 | { | |
5080 | tic6x_unwind_info *unwind = tic6x_get_unwind (); | |
5081 | struct cfi_insn_data *insn; | |
5082 | int reg; | |
5083 | unsigned safe_mask = 0; | |
5084 | unsigned compact_mask = 0; | |
5085 | unsigned reg_saved_mask = 0; | |
5086 | offsetT cfa_offset = 0; | |
5087 | offsetT save_offset = 0; | |
5088 | ||
5089 | unwind->cfa_reg = 31; | |
5090 | unwind->return_reg = UNWIND_B3; | |
5091 | unwind->saved_reg_count = 0; | |
5092 | unwind->pop_rts = FALSE; | |
5093 | ||
5094 | unwind->saved_seg = now_seg; | |
5095 | unwind->saved_subseg = now_subseg; | |
5096 | ||
5097 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5098 | unwind->reg_saved[reg] = FALSE; | |
5099 | ||
5100 | /* Scan FDE instructions to build up stack frame layout. */ | |
5101 | for (insn = fde->data; insn; insn = insn->next) | |
5102 | { | |
5103 | switch (insn->insn) | |
5104 | { | |
5105 | case DW_CFA_advance_loc: | |
5106 | break; | |
5107 | ||
5108 | case DW_CFA_def_cfa: | |
5109 | unwind->cfa_reg = insn->u.ri.reg; | |
5110 | cfa_offset = insn->u.ri.offset; | |
5111 | break; | |
5112 | ||
5113 | case DW_CFA_def_cfa_register: | |
5114 | unwind->cfa_reg = insn->u.r; | |
5115 | break; | |
5116 | ||
5117 | case DW_CFA_def_cfa_offset: | |
5118 | cfa_offset = insn->u.i; | |
5119 | break; | |
5120 | ||
5121 | case DW_CFA_undefined: | |
5122 | case DW_CFA_same_value: | |
5123 | reg = tic6x_unwind_reg_from_dwarf (insn->u.r); | |
5124 | if (reg >= 0) | |
5125 | unwind->reg_saved[reg] = FALSE; | |
5126 | break; | |
5127 | ||
5128 | case DW_CFA_offset: | |
5129 | reg = tic6x_unwind_reg_from_dwarf (insn->u.ri.reg); | |
5130 | if (reg < 0) | |
5131 | { | |
5132 | as_bad (_("unable to generate unwinding opcode for reg %d"), | |
5133 | insn->u.ri.reg); | |
5134 | return; | |
5135 | } | |
5136 | unwind->reg_saved[reg] = TRUE; | |
5137 | unwind->reg_offset[reg] = insn->u.ri.offset; | |
5138 | if (insn->u.ri.reg == UNWIND_B3) | |
5139 | unwind->return_reg = UNWIND_B3; | |
5140 | break; | |
5141 | ||
5142 | case DW_CFA_register: | |
5143 | if (insn->u.rr.reg1 != 19) | |
5144 | { | |
5145 | as_bad (_("unable to generate unwinding opcode for reg %d"), | |
5146 | insn->u.rr.reg1); | |
5147 | return; | |
5148 | } | |
5149 | ||
5150 | reg = tic6x_unwind_reg_from_dwarf (insn->u.rr.reg2); | |
5151 | if (reg < 0) | |
5152 | { | |
5153 | as_bad (_("unable to generate unwinding opcode for reg %d"), | |
5154 | insn->u.rr.reg2); | |
5155 | return; | |
5156 | } | |
5157 | ||
5158 | unwind->return_reg = reg; | |
5159 | unwind->reg_saved[UNWIND_B3] = FALSE; | |
5160 | if (unwind->reg_saved[reg]) | |
5161 | { | |
5162 | as_bad (_("unable to restore return address from " | |
5163 | "previously restored reg")); | |
5164 | return; | |
5165 | } | |
5166 | break; | |
5167 | ||
5168 | case DW_CFA_restore: | |
5169 | case DW_CFA_remember_state: | |
5170 | case DW_CFA_restore_state: | |
5171 | case DW_CFA_GNU_window_save: | |
5172 | case CFI_escape: | |
5173 | case CFI_val_encoded_addr: | |
5174 | as_bad (_("unhandled CFA insn for unwinding (%d)"), insn->insn); | |
5175 | break; | |
5176 | ||
5177 | default: | |
5178 | abort (); | |
5179 | } | |
5180 | } | |
5181 | ||
5182 | if (unwind->cfa_reg != 15 && unwind->cfa_reg != 31) | |
5183 | { | |
5184 | as_bad (_("unable to generate unwinding opcode for frame pointer reg %d"), | |
5185 | unwind->cfa_reg); | |
5186 | return; | |
5187 | } | |
5188 | ||
5189 | if (unwind->cfa_reg == 15) | |
5190 | { | |
5191 | if (cfa_offset != 0) | |
5192 | { | |
5193 | as_bad (_("unable to generate unwinding opcode for " | |
5194 | "frame pointer offset")); | |
5195 | return; | |
5196 | } | |
5197 | } | |
5198 | else | |
5199 | { | |
5200 | if ((cfa_offset & 7) != 0) | |
5201 | { | |
5202 | as_bad (_("unwound stack pointer not doubleword aligned")); | |
5203 | return; | |
5204 | } | |
5205 | } | |
5206 | ||
5207 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5208 | { | |
5209 | if (unwind->reg_saved[reg]) | |
5210 | reg_saved_mask |= 1 << (TIC6X_NUM_UNWIND_REGS - (reg + 1)); | |
5211 | } | |
5212 | ||
5213 | /* Check for standard "safe debug" frame layout */ | |
5214 | if (reg_saved_mask) | |
5215 | { | |
5216 | save_offset = 0; | |
5217 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5218 | { | |
5219 | if (!unwind->reg_saved[reg]) | |
5220 | continue; | |
5221 | ||
5222 | if (target_big_endian | |
5223 | && reg < TIC6X_NUM_UNWIND_REGS - 1 | |
5224 | && unwind->reg_saved[reg + 1] | |
5225 | && tic6x_unwind_frame_regs[reg] | |
5226 | == tic6x_unwind_frame_regs[reg + 1] + 1 | |
5227 | && (tic6x_unwind_frame_regs[reg] & 1) == 1 | |
5228 | && (save_offset & 4) == 4) | |
5229 | { | |
5230 | /* Swapped pair */ | |
5231 | if (save_offset != unwind->reg_offset[reg + 1] | |
5232 | || save_offset - 4 != unwind->reg_offset[reg]) | |
5233 | break; | |
5234 | save_offset -= 8; | |
5235 | reg++; | |
5236 | } | |
5237 | else | |
5238 | { | |
5239 | if (save_offset != unwind->reg_offset[reg]) | |
5240 | break; | |
5241 | save_offset -= 4; | |
5242 | } | |
5243 | } | |
5244 | if (reg == TIC6X_NUM_UNWIND_REGS) | |
5245 | { | |
5246 | safe_mask = reg_saved_mask; | |
5247 | reg_saved_mask = 0; | |
5248 | } | |
5249 | } | |
5250 | ||
5251 | /* Check for compact frame layout. */ | |
5252 | if (reg_saved_mask) | |
5253 | { | |
5254 | save_offset = 0; | |
5255 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5256 | { | |
5257 | int reg2; | |
5258 | ||
5259 | if (!unwind->reg_saved[reg]) | |
5260 | continue; | |
5261 | ||
5262 | if (reg < TIC6X_NUM_UNWIND_REGS - 1) | |
5263 | { | |
5264 | reg2 = reg + 1; | |
5265 | ||
5266 | if (!unwind->reg_saved[reg2] | |
5267 | || tic6x_unwind_frame_regs[reg] | |
5268 | != tic6x_unwind_frame_regs[reg2] + 1 | |
5269 | || (tic6x_unwind_frame_regs[reg2] & 1) != 0 | |
5270 | || save_offset == 0) | |
5271 | reg2 = -1; | |
5272 | } | |
5273 | else | |
5274 | reg2 = -1; | |
5275 | ||
5276 | if (reg2 >= 0) | |
5277 | { | |
5278 | int high_offset; | |
5279 | if (target_big_endian) | |
5280 | high_offset = 4; /* lower address = positive stack offset. */ | |
5281 | else | |
5282 | high_offset = 0; | |
5283 | ||
5284 | if (save_offset + 4 - high_offset != unwind->reg_offset[reg] | |
5285 | || save_offset + high_offset != unwind->reg_offset[reg2]) | |
5286 | { | |
5287 | break; | |
5288 | } | |
5289 | reg++; | |
5290 | } | |
5291 | else | |
5292 | { | |
5293 | if (save_offset != unwind->reg_offset[reg]) | |
5294 | break; | |
5295 | } | |
5296 | save_offset -= 8; | |
5297 | } | |
5298 | ||
5299 | if (reg == TIC6X_NUM_UNWIND_REGS) | |
5300 | { | |
5301 | compact_mask = reg_saved_mask; | |
5302 | reg_saved_mask = 0; | |
5303 | } | |
5304 | } | |
5305 | ||
5306 | /* Check for __c6xabi_pop_rts format */ | |
5307 | if (reg_saved_mask == 0x17ff) | |
5308 | { | |
5309 | const int *pop_rts_offset = target_big_endian | |
5310 | ? tic6x_pop_rts_offset_big | |
5311 | : tic6x_pop_rts_offset_little; | |
5312 | ||
5313 | save_offset = 0; | |
5314 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5315 | { | |
5316 | if (reg == UNWIND_B15) | |
5317 | continue; | |
5318 | ||
5319 | if (unwind->reg_offset[reg] != pop_rts_offset[reg] * 4) | |
5320 | break; | |
5321 | } | |
5322 | ||
5323 | if (reg == TIC6X_NUM_UNWIND_REGS) | |
5324 | { | |
5325 | unwind->pop_rts = TRUE; | |
5326 | reg_saved_mask = 0; | |
5327 | } | |
5328 | } | |
5329 | /* If all else fails then describe the frame manually. */ | |
5330 | if (reg_saved_mask) | |
5331 | { | |
5332 | save_offset = 0; | |
5333 | ||
5334 | for (reg = 0; reg < TIC6X_NUM_UNWIND_REGS; reg++) | |
5335 | { | |
5336 | if (!unwind->reg_saved[reg]) | |
5337 | continue; | |
5338 | ||
5339 | unwind->saved_reg_count++; | |
3739860c | 5340 | /* Encoding uses 4 bits per word, so size of unwinding opcode data |
1bce6bd8 PB |
5341 | limits the save area size. The exact cap will be figured out |
5342 | later due to overflow, the 0x800 here is just a quick sanity | |
5343 | check to weed out obviously excessive offsets. */ | |
5344 | if (unwind->reg_offset[reg] > 0 || unwind->reg_offset[reg] < -0x800 | |
5345 | || (unwind->reg_offset[reg] & 3) != 0) | |
5346 | { | |
5347 | as_bad (_("stack frame layout too complex for unwinder")); | |
5348 | return; | |
5349 | } | |
5350 | ||
5351 | if (unwind->reg_offset[reg] < save_offset) | |
5352 | save_offset = unwind->reg_offset[reg] - 4; | |
5353 | } | |
5354 | } | |
5355 | ||
5356 | /* Align to 8-byte boundary (stack grows towards negative offsets). */ | |
5357 | save_offset &= ~7; | |
5358 | ||
5359 | if (unwind->cfa_reg == 31 && !reg_saved_mask) | |
5360 | { | |
5361 | cfa_offset += save_offset; | |
5362 | if (cfa_offset < 0) | |
5363 | { | |
5364 | as_bad (_("unwound frame has negative size")); | |
5365 | return; | |
5366 | } | |
5367 | } | |
5368 | ||
5369 | unwind->safe_mask = safe_mask; | |
5370 | unwind->compact_mask = compact_mask; | |
5371 | unwind->reg_saved_mask = reg_saved_mask; | |
5372 | unwind->cfa_offset = cfa_offset; | |
5373 | unwind->function_start = fde->start_address; | |
5374 | } |