Commit | Line | Data |
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4bf4a882 | 1 | /* tc-m32r.c -- Assembler for the Renesas M32R. |
2571583a | 2 | Copyright (C) 1996-2017 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
4b4da160 NC |
18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "as.h" |
3882b010 | 22 | #include "safe-ctype.h" |
ab3e48dc | 23 | #include "subsegs.h" |
252b5132 RH |
24 | #include "symcat.h" |
25 | #include "opcodes/m32r-desc.h" | |
26 | #include "opcodes/m32r-opc.h" | |
27 | #include "cgen.h" | |
88845958 | 28 | #include "elf/m32r.h" |
252b5132 RH |
29 | |
30 | /* Linked list of symbols that are debugging symbols to be defined as the | |
31 | beginning of the current instruction. */ | |
32 | typedef struct sym_link | |
33 | { | |
34 | struct sym_link *next; | |
ab3e48dc | 35 | symbolS *symbol; |
252b5132 RH |
36 | } sym_linkS; |
37 | ||
ab3e48dc KH |
38 | static sym_linkS *debug_sym_link = (sym_linkS *) 0; |
39 | ||
252b5132 RH |
40 | /* Structure to hold all of the different components describing |
41 | an individual instruction. */ | |
42 | typedef struct | |
43 | { | |
ab3e48dc KH |
44 | const CGEN_INSN *insn; |
45 | const CGEN_INSN *orig_insn; | |
46 | CGEN_FIELDS fields; | |
252b5132 | 47 | #if CGEN_INT_INSN_P |
ab3e48dc | 48 | CGEN_INSN_INT buffer[1]; |
252b5132 RH |
49 | #define INSN_VALUE(buf) (*(buf)) |
50 | #else | |
ab3e48dc | 51 | unsigned char buffer[CGEN_MAX_INSN_SIZE]; |
252b5132 RH |
52 | #define INSN_VALUE(buf) (buf) |
53 | #endif | |
ab3e48dc KH |
54 | char *addr; |
55 | fragS *frag; | |
56 | int num_fixups; | |
57 | fixS *fixups[GAS_CGEN_MAX_FIXUPS]; | |
58 | int indices[MAX_OPERAND_INSTANCES]; | |
59 | sym_linkS *debug_sym_link; | |
252b5132 RH |
60 | } |
61 | m32r_insn; | |
62 | ||
63 | /* prev_insn.insn is non-null if last insn was a 16 bit insn on a 32 bit | |
64 | boundary (i.e. was the first of two 16 bit insns). */ | |
ab3e48dc | 65 | static m32r_insn prev_insn; |
252b5132 RH |
66 | |
67 | /* Non-zero if we've seen a relaxable insn since the last 32 bit | |
68 | alignment request. */ | |
69 | static int seen_relaxable_p = 0; | |
70 | ||
6edf0760 NC |
71 | /* Non-zero if we are generating PIC code. */ |
72 | int pic_code; | |
73 | ||
252b5132 RH |
74 | /* Non-zero if -relax specified, in which case sufficient relocs are output |
75 | for the linker to do relaxing. | |
76 | We do simple forms of relaxing internally, but they are always done. | |
77 | This flag does not apply to them. */ | |
78 | static int m32r_relax; | |
79 | ||
252b5132 RH |
80 | /* Non-zero if warn when a high/shigh reloc has no matching low reloc. |
81 | Each high/shigh reloc must be paired with it's low cousin in order to | |
82 | properly calculate the addend in a relocatable link (since there is a | |
83 | potential carry from the low to the high/shigh). | |
84 | This option is off by default though for user-written assembler code it | |
85 | might make sense to make the default be on (i.e. have gcc pass a flag | |
86 | to turn it off). This warning must not be on for GCC created code as | |
87 | optimization may delete the low but not the high/shigh (at least we | |
88 | shouldn't assume or require it to). */ | |
89 | static int warn_unmatched_high = 0; | |
90 | ||
88845958 NC |
91 | /* 1 if -m32rx has been specified, in which case support for |
92 | the extended M32RX instruction set should be enabled. | |
93 | 2 if -m32r2 has been specified, in which case support for | |
94 | the extended M32R2 instruction set should be enabled. */ | |
95 | static int enable_m32rx = 0; /* Default to M32R. */ | |
925c058e DE |
96 | |
97 | /* Non-zero if -m32rx -hidden has been specified, in which case support for | |
98 | the special M32RX instruction set should be enabled. */ | |
99 | static int enable_special = 0; | |
100 | ||
88845958 NC |
101 | /* Non-zero if -bitinst has been specified, in which case support |
102 | for extended M32R bit-field instruction set should be enabled. */ | |
bd337dde | 103 | static int enable_special_m32r = 1; |
88845958 NC |
104 | |
105 | /* Non-zero if -float has been specified, in which case support for | |
106 | extended M32R floating point instruction set should be enabled. */ | |
107 | static int enable_special_float = 0; | |
108 | ||
925c058e DE |
109 | /* Non-zero if the programmer should be warned when an explicit parallel |
110 | instruction might have constraint violations. */ | |
111 | static int warn_explicit_parallel_conflicts = 1; | |
112 | ||
b145f546 NC |
113 | /* Non-zero if the programmer should not receive any messages about |
114 | parallel instruction with potential or real constraint violations. | |
115 | The ability to suppress these messages is intended only for hardware | |
33eaf5de | 116 | vendors testing the chip. It supersedes |
b145f546 NC |
117 | warn_explicit_parallel_conflicts. */ |
118 | static int ignore_parallel_conflicts = 0; | |
88845958 | 119 | |
925c058e | 120 | /* Non-zero if insns can be made parallel. */ |
6858915a | 121 | static int use_parallel = 0; |
88845958 NC |
122 | |
123 | /* Non-zero if optimizations should be performed. */ | |
925c058e | 124 | static int optimize; |
252b5132 | 125 | |
88845958 NC |
126 | /* m32r er_flags. */ |
127 | static int m32r_flags = 0; | |
128 | ||
ab3e48dc | 129 | /* Stuff for .scomm symbols. */ |
252b5132 RH |
130 | static segT sbss_section; |
131 | static asection scom_section; | |
132 | static asymbol scom_symbol; | |
133 | ||
134 | const char comment_chars[] = ";"; | |
135 | const char line_comment_chars[] = "#"; | |
88845958 | 136 | const char line_separator_chars[] = "!"; |
252b5132 RH |
137 | const char EXP_CHARS[] = "eE"; |
138 | const char FLT_CHARS[] = "dD"; | |
139 | ||
140 | /* Relocations against symbols are done in two | |
141 | parts, with a HI relocation and a LO relocation. Each relocation | |
142 | has only 16 bits of space to store an addend. This means that in | |
143 | order for the linker to handle carries correctly, it must be able | |
144 | to locate both the HI and the LO relocation. This means that the | |
145 | relocations must appear in order in the relocation table. | |
146 | ||
147 | In order to implement this, we keep track of each unmatched HI | |
148 | relocation. We then sort them so that they immediately precede the | |
82efde3a | 149 | corresponding LO relocation. */ |
252b5132 RH |
150 | |
151 | struct m32r_hi_fixup | |
152 | { | |
ab3e48dc KH |
153 | /* Next HI fixup. */ |
154 | struct m32r_hi_fixup *next; | |
155 | ||
156 | /* This fixup. */ | |
157 | fixS *fixp; | |
252b5132 | 158 | |
ab3e48dc KH |
159 | /* The section this fixup is in. */ |
160 | segT seg; | |
252b5132 RH |
161 | }; |
162 | ||
163 | /* The list of unmatched HI relocs. */ | |
164 | ||
ab3e48dc | 165 | static struct m32r_hi_fixup *m32r_hi_fixup_list; |
252b5132 | 166 | \f |
7b14583e | 167 | static const struct |
ea1562b3 | 168 | { |
88845958 NC |
169 | enum bfd_architecture bfd_mach; |
170 | int mach_flags; | |
171 | } mach_table[] = | |
172 | { | |
173 | { bfd_mach_m32r, (1<<MACH_M32R) }, | |
174 | { bfd_mach_m32rx, (1<<MACH_M32RX) }, | |
175 | { bfd_mach_m32r2, (1<<MACH_M32R2) } | |
176 | }; | |
177 | ||
925c058e | 178 | static void |
88845958 | 179 | allow_m32rx (int on) |
925c058e DE |
180 | { |
181 | enable_m32rx = on; | |
182 | ||
183 | if (stdoutput != NULL) | |
88845958 NC |
184 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach_table[on].bfd_mach); |
185 | ||
186 | if (gas_cgen_cpu_desc != NULL) | |
187 | gas_cgen_cpu_desc->machs = mach_table[on].mach_flags; | |
925c058e | 188 | } |
252b5132 | 189 | \f |
6edf0760 | 190 | #define M32R_SHORTOPTS "O::K:" |
ab3e48dc KH |
191 | |
192 | const char *md_shortopts = M32R_SHORTOPTS; | |
252b5132 | 193 | |
ea1562b3 NC |
194 | enum md_option_enums |
195 | { | |
196 | OPTION_M32R = OPTION_MD_BASE, | |
197 | OPTION_M32RX, | |
198 | OPTION_M32R2, | |
199 | OPTION_BIG, | |
200 | OPTION_LITTLE, | |
201 | OPTION_PARALLEL, | |
202 | OPTION_NO_PARALLEL, | |
203 | OPTION_WARN_PARALLEL, | |
204 | OPTION_NO_WARN_PARALLEL, | |
205 | OPTION_IGNORE_PARALLEL, | |
206 | OPTION_NO_IGNORE_PARALLEL, | |
207 | OPTION_SPECIAL, | |
208 | OPTION_SPECIAL_M32R, | |
209 | OPTION_NO_SPECIAL_M32R, | |
210 | OPTION_SPECIAL_FLOAT, | |
211 | OPTION_WARN_UNMATCHED, | |
212 | OPTION_NO_WARN_UNMATCHED | |
213 | }; | |
214 | ||
252b5132 RH |
215 | struct option md_longopts[] = |
216 | { | |
8ad9e709 | 217 | {"m32r", no_argument, NULL, OPTION_M32R}, |
925c058e | 218 | {"m32rx", no_argument, NULL, OPTION_M32RX}, |
88845958 NC |
219 | {"m32r2", no_argument, NULL, OPTION_M32R2}, |
220 | {"big", no_argument, NULL, OPTION_BIG}, | |
221 | {"little", no_argument, NULL, OPTION_LITTLE}, | |
222 | {"EB", no_argument, NULL, OPTION_BIG}, | |
223 | {"EL", no_argument, NULL, OPTION_LITTLE}, | |
224 | {"parallel", no_argument, NULL, OPTION_PARALLEL}, | |
225 | {"no-parallel", no_argument, NULL, OPTION_NO_PARALLEL}, | |
925c058e DE |
226 | {"warn-explicit-parallel-conflicts", no_argument, NULL, OPTION_WARN_PARALLEL}, |
227 | {"Wp", no_argument, NULL, OPTION_WARN_PARALLEL}, | |
925c058e DE |
228 | {"no-warn-explicit-parallel-conflicts", no_argument, NULL, OPTION_NO_WARN_PARALLEL}, |
229 | {"Wnp", no_argument, NULL, OPTION_NO_WARN_PARALLEL}, | |
b145f546 NC |
230 | {"ignore-parallel-conflicts", no_argument, NULL, OPTION_IGNORE_PARALLEL}, |
231 | {"Ip", no_argument, NULL, OPTION_IGNORE_PARALLEL}, | |
232 | {"no-ignore-parallel-conflicts", no_argument, NULL, OPTION_NO_IGNORE_PARALLEL}, | |
233 | {"nIp", no_argument, NULL, OPTION_NO_IGNORE_PARALLEL}, | |
925c058e | 234 | {"hidden", no_argument, NULL, OPTION_SPECIAL}, |
88845958 | 235 | {"bitinst", no_argument, NULL, OPTION_SPECIAL_M32R}, |
bd337dde | 236 | {"no-bitinst", no_argument, NULL, OPTION_NO_SPECIAL_M32R}, |
88845958 | 237 | {"float", no_argument, NULL, OPTION_SPECIAL_FLOAT}, |
252b5132 | 238 | /* Sigh. I guess all warnings must now have both variants. */ |
2f3519a2 NC |
239 | {"warn-unmatched-high", no_argument, NULL, OPTION_WARN_UNMATCHED}, |
240 | {"Wuh", no_argument, NULL, OPTION_WARN_UNMATCHED}, | |
d3388653 NC |
241 | {"no-warn-unmatched-high", no_argument, NULL, OPTION_NO_WARN_UNMATCHED}, |
242 | {"Wnuh", no_argument, NULL, OPTION_NO_WARN_UNMATCHED}, | |
252b5132 RH |
243 | {NULL, no_argument, NULL, 0} |
244 | }; | |
ab3e48dc | 245 | |
252b5132 RH |
246 | size_t md_longopts_size = sizeof (md_longopts); |
247 | ||
88845958 NC |
248 | static void |
249 | little (int on) | |
250 | { | |
251 | target_big_endian = ! on; | |
252 | } | |
253 | ||
254 | /* Use parallel execution. */ | |
255 | ||
256 | static int | |
257 | parallel (void) | |
258 | { | |
259 | if (! enable_m32rx) | |
260 | return 0; | |
261 | ||
262 | if (use_parallel == 1) | |
263 | return 1; | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
252b5132 | 268 | int |
17b9d67d | 269 | md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED) |
252b5132 RH |
270 | { |
271 | switch (c) | |
272 | { | |
925c058e DE |
273 | case 'O': |
274 | optimize = 1; | |
88845958 | 275 | use_parallel = 1; |
925c058e DE |
276 | break; |
277 | ||
8ad9e709 NC |
278 | case OPTION_M32R: |
279 | allow_m32rx (0); | |
280 | break; | |
ab3e48dc | 281 | |
925c058e DE |
282 | case OPTION_M32RX: |
283 | allow_m32rx (1); | |
284 | break; | |
ab3e48dc | 285 | |
88845958 NC |
286 | case OPTION_M32R2: |
287 | allow_m32rx (2); | |
288 | enable_special = 1; | |
289 | enable_special_m32r = 1; | |
290 | break; | |
291 | ||
292 | case OPTION_BIG: | |
293 | target_big_endian = 1; | |
294 | break; | |
295 | ||
296 | case OPTION_LITTLE: | |
297 | target_big_endian = 0; | |
298 | break; | |
299 | ||
300 | case OPTION_PARALLEL: | |
301 | use_parallel = 1; | |
302 | break; | |
303 | ||
304 | case OPTION_NO_PARALLEL: | |
305 | use_parallel = 0; | |
306 | break; | |
307 | ||
925c058e DE |
308 | case OPTION_WARN_PARALLEL: |
309 | warn_explicit_parallel_conflicts = 1; | |
310 | break; | |
ab3e48dc | 311 | |
925c058e | 312 | case OPTION_NO_WARN_PARALLEL: |
88845958 | 313 | warn_explicit_parallel_conflicts = 0; |
88845958 NC |
314 | break; |
315 | ||
b145f546 NC |
316 | case OPTION_IGNORE_PARALLEL: |
317 | ignore_parallel_conflicts = 1; | |
88845958 NC |
318 | break; |
319 | ||
b145f546 NC |
320 | case OPTION_NO_IGNORE_PARALLEL: |
321 | ignore_parallel_conflicts = 0; | |
925c058e DE |
322 | break; |
323 | ||
324 | case OPTION_SPECIAL: | |
325 | if (enable_m32rx) | |
326 | enable_special = 1; | |
327 | else | |
328 | { | |
329 | /* Pretend that we do not recognise this option. */ | |
330 | as_bad (_("Unrecognised option: -hidden")); | |
331 | return 0; | |
332 | } | |
333 | break; | |
252b5132 | 334 | |
88845958 NC |
335 | case OPTION_SPECIAL_M32R: |
336 | enable_special_m32r = 1; | |
337 | break; | |
338 | ||
bd337dde NC |
339 | case OPTION_NO_SPECIAL_M32R: |
340 | enable_special_m32r = 0; | |
341 | break; | |
342 | ||
88845958 NC |
343 | case OPTION_SPECIAL_FLOAT: |
344 | enable_special_float = 1; | |
345 | break; | |
346 | ||
252b5132 RH |
347 | case OPTION_WARN_UNMATCHED: |
348 | warn_unmatched_high = 1; | |
349 | break; | |
350 | ||
351 | case OPTION_NO_WARN_UNMATCHED: | |
352 | warn_unmatched_high = 0; | |
353 | break; | |
ab3e48dc | 354 | |
6edf0760 NC |
355 | case 'K': |
356 | if (strcmp (arg, "PIC") != 0) | |
357 | as_warn (_("Unrecognized option following -K")); | |
358 | else | |
359 | pic_code = 1; | |
360 | break; | |
361 | ||
252b5132 RH |
362 | default: |
363 | return 0; | |
364 | } | |
ab3e48dc | 365 | |
252b5132 RH |
366 | return 1; |
367 | } | |
368 | ||
369 | void | |
ea1562b3 | 370 | md_show_usage (FILE *stream) |
252b5132 RH |
371 | { |
372 | fprintf (stream, _(" M32R specific command line options:\n")); | |
373 | ||
ded0aeb7 NC |
374 | fprintf (stream, _("\ |
375 | -m32r disable support for the m32rx instruction set\n")); | |
925c058e DE |
376 | fprintf (stream, _("\ |
377 | -m32rx support the extended m32rx instruction set\n")); | |
378 | fprintf (stream, _("\ | |
88845958 NC |
379 | -m32r2 support the extended m32r2 instruction set\n")); |
380 | fprintf (stream, _("\ | |
381 | -EL,-little produce little endian code and data\n")); | |
382 | fprintf (stream, _("\ | |
383 | -EB,-big produce big endian code and data\n")); | |
384 | fprintf (stream, _("\ | |
385 | -parallel try to combine instructions in parallel\n")); | |
386 | fprintf (stream, _("\ | |
387 | -no-parallel disable -parallel\n")); | |
388 | fprintf (stream, _("\ | |
bd337dde NC |
389 | -no-bitinst disallow the M32R2's extended bit-field instructions\n")); |
390 | fprintf (stream, _("\ | |
88845958 | 391 | -O try to optimize code. Implies -parallel\n")); |
925c058e DE |
392 | |
393 | fprintf (stream, _("\ | |
394 | -warn-explicit-parallel-conflicts warn when parallel instructions\n")); | |
395 | fprintf (stream, _("\ | |
33eaf5de | 396 | might violate constraints\n")); |
925c058e DE |
397 | fprintf (stream, _("\ |
398 | -no-warn-explicit-parallel-conflicts do not warn when parallel\n")); | |
399 | fprintf (stream, _("\ | |
33eaf5de | 400 | instructions might violate constraints\n")); |
925c058e DE |
401 | fprintf (stream, _("\ |
402 | -Wp synonym for -warn-explicit-parallel-conflicts\n")); | |
403 | fprintf (stream, _("\ | |
404 | -Wnp synonym for -no-warn-explicit-parallel-conflicts\n")); | |
88845958 | 405 | fprintf (stream, _("\ |
b145f546 | 406 | -ignore-parallel-conflicts do not check parallel instructions\n")); |
88845958 | 407 | fprintf (stream, _("\ |
9fd07943 | 408 | for constraint violations\n")); |
88845958 | 409 | fprintf (stream, _("\ |
b145f546 | 410 | -no-ignore-parallel-conflicts check parallel instructions for\n")); |
88845958 | 411 | fprintf (stream, _("\ |
9fd07943 | 412 | constraint violations\n")); |
88845958 | 413 | fprintf (stream, _("\ |
b145f546 | 414 | -Ip synonym for -ignore-parallel-conflicts\n")); |
88845958 | 415 | fprintf (stream, _("\ |
b145f546 | 416 | -nIp synonym for -no-ignore-parallel-conflicts\n")); |
252b5132 RH |
417 | |
418 | fprintf (stream, _("\ | |
419 | -warn-unmatched-high warn when an (s)high reloc has no matching low reloc\n")); | |
420 | fprintf (stream, _("\ | |
421 | -no-warn-unmatched-high do not warn about missing low relocs\n")); | |
422 | fprintf (stream, _("\ | |
423 | -Wuh synonym for -warn-unmatched-high\n")); | |
424 | fprintf (stream, _("\ | |
425 | -Wnuh synonym for -no-warn-unmatched-high\n")); | |
426 | ||
6edf0760 NC |
427 | fprintf (stream, _("\ |
428 | -KPIC generate PIC\n")); | |
ab3e48dc | 429 | } |
252b5132 | 430 | |
252b5132 RH |
431 | /* Set by md_assemble for use by m32r_fill_insn. */ |
432 | static subsegT prev_subseg; | |
433 | static segT prev_seg; | |
434 | ||
097f809a NC |
435 | #define GOT_NAME "_GLOBAL_OFFSET_TABLE_" |
436 | symbolS * GOT_symbol; | |
437 | ||
438 | static inline int | |
439 | m32r_PIC_related_p (symbolS *sym) | |
440 | { | |
441 | expressionS *exp; | |
442 | ||
443 | if (! sym) | |
444 | return 0; | |
445 | ||
446 | if (sym == GOT_symbol) | |
447 | return 1; | |
448 | ||
449 | exp = symbol_get_value_expression (sym); | |
450 | ||
451 | return (exp->X_op == O_PIC_reloc | |
452 | || exp->X_md == BFD_RELOC_M32R_26_PLTREL | |
453 | || m32r_PIC_related_p (exp->X_add_symbol) | |
454 | || m32r_PIC_related_p (exp->X_op_symbol)); | |
455 | } | |
456 | ||
457 | static inline int | |
458 | m32r_check_fixup (expressionS *main_exp, bfd_reloc_code_real_type *r_type_p) | |
459 | { | |
460 | expressionS *exp = main_exp; | |
461 | ||
462 | if (exp->X_op == O_add && m32r_PIC_related_p (exp->X_op_symbol)) | |
463 | return 1; | |
464 | ||
465 | if (exp->X_op == O_symbol && exp->X_add_symbol) | |
466 | { | |
467 | if (exp->X_add_symbol == GOT_symbol) | |
468 | { | |
469 | *r_type_p = BFD_RELOC_M32R_GOTPC24; | |
470 | return 0; | |
471 | } | |
472 | } | |
473 | else if (exp->X_op == O_add) | |
474 | { | |
475 | exp = symbol_get_value_expression (exp->X_add_symbol); | |
476 | if (! exp) | |
477 | return 0; | |
478 | } | |
479 | ||
0a7b9ba6 | 480 | if (exp->X_op == O_PIC_reloc) |
097f809a NC |
481 | { |
482 | *r_type_p = exp->X_md; | |
483 | if (exp == main_exp) | |
484 | exp->X_op = O_symbol; | |
485 | else | |
486 | { | |
487 | main_exp->X_add_symbol = exp->X_add_symbol; | |
488 | main_exp->X_add_number += exp->X_add_number; | |
489 | } | |
490 | } | |
491 | else | |
492 | return (m32r_PIC_related_p (exp->X_add_symbol) | |
493 | || m32r_PIC_related_p (exp->X_op_symbol)); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
252b5132 | 498 | /* FIXME: Should be machine generated. */ |
88845958 | 499 | #define NOP_INSN 0x7000 |
ab3e48dc | 500 | #define PAR_NOP_INSN 0xf000 /* Can only be used in 2nd slot. */ |
252b5132 | 501 | |
0a9ef439 RH |
502 | /* This is called from HANDLE_ALIGN in write.c. Fill in the contents |
503 | of an rs_align_code fragment. */ | |
252b5132 | 504 | |
0a9ef439 | 505 | void |
ea1562b3 | 506 | m32r_handle_align (fragS *fragp) |
252b5132 | 507 | { |
0a9ef439 RH |
508 | static const unsigned char nop_pattern[] = { 0xf0, 0x00 }; |
509 | static const unsigned char multi_nop_pattern[] = { 0x70, 0x00, 0xf0, 0x00 }; | |
252b5132 | 510 | |
0a9ef439 RH |
511 | int bytes, fix; |
512 | char *p; | |
ab3e48dc | 513 | |
0a9ef439 RH |
514 | if (fragp->fr_type != rs_align_code) |
515 | return; | |
516 | ||
517 | bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix; | |
518 | p = fragp->fr_literal + fragp->fr_fix; | |
519 | fix = 0; | |
520 | ||
521 | if (bytes & 1) | |
522 | { | |
523 | fix = 1; | |
524 | *p++ = 0; | |
525 | bytes--; | |
252b5132 RH |
526 | } |
527 | ||
0a9ef439 RH |
528 | if (bytes & 2) |
529 | { | |
530 | memcpy (p, nop_pattern, 2); | |
531 | p += 2; | |
532 | bytes -= 2; | |
533 | fix += 2; | |
534 | } | |
535 | ||
536 | memcpy (p, multi_nop_pattern, 4); | |
537 | ||
538 | fragp->fr_fix += fix; | |
539 | fragp->fr_var = 4; | |
252b5132 RH |
540 | } |
541 | ||
542 | /* If the last instruction was the first of 2 16 bit insns, | |
543 | output a nop to move the PC to a 32 bit boundary. | |
544 | ||
545 | This is done via an alignment specification since branch relaxing | |
546 | may make it unnecessary. | |
547 | ||
548 | Internally, we need to output one of these each time a 32 bit insn is | |
549 | seen after an insn that is relaxable. */ | |
550 | ||
551 | static void | |
ea1562b3 | 552 | fill_insn (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 553 | { |
0a9ef439 | 554 | frag_align_code (2, 0); |
252b5132 RH |
555 | prev_insn.insn = NULL; |
556 | seen_relaxable_p = 0; | |
557 | } | |
558 | ||
559 | /* Record the symbol so that when we output the insn, we can create | |
560 | a symbol that is at the start of the instruction. This is used | |
561 | to emit the label for the start of a breakpoint without causing | |
562 | the assembler to emit a NOP if the previous instruction was a | |
563 | 16 bit instruction. */ | |
564 | ||
565 | static void | |
ea1562b3 | 566 | debug_sym (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 567 | { |
ea1562b3 NC |
568 | char *name; |
569 | char delim; | |
ea1562b3 | 570 | symbolS *symbolP; |
91d6fa6a | 571 | sym_linkS *lnk; |
252b5132 | 572 | |
d02603dc | 573 | delim = get_symbol_name (&name); |
ab3e48dc | 574 | |
252b5132 RH |
575 | if ((symbolP = symbol_find (name)) == NULL |
576 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
ea1562b3 | 577 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); |
252b5132 RH |
578 | |
579 | symbol_table_insert (symbolP); | |
6edf0760 NC |
580 | if (S_IS_DEFINED (symbolP) && (S_GET_SEGMENT (symbolP) != reg_section |
581 | || S_IS_EXTERNAL (symbolP) | |
582 | || S_IS_WEAK (symbolP))) | |
252b5132 RH |
583 | /* xgettext:c-format */ |
584 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
585 | ||
586 | else | |
587 | { | |
325801bd | 588 | lnk = XNEW (sym_linkS); |
91d6fa6a NC |
589 | lnk->symbol = symbolP; |
590 | lnk->next = debug_sym_link; | |
591 | debug_sym_link = lnk; | |
f412ead8 | 592 | symbol_get_obj (symbolP)->local = 1; |
252b5132 RH |
593 | } |
594 | ||
d02603dc | 595 | (void) restore_line_pointer (delim); |
252b5132 RH |
596 | demand_empty_rest_of_line (); |
597 | } | |
598 | ||
599 | /* Second pass to expanding the debug symbols, go through linked | |
600 | list of symbols and reassign the address. */ | |
601 | ||
602 | static void | |
ea1562b3 | 603 | expand_debug_syms (sym_linkS *syms, int align) |
252b5132 RH |
604 | { |
605 | char *save_input_line = input_line_pointer; | |
606 | sym_linkS *next_syms; | |
607 | ||
608 | if (!syms) | |
609 | return; | |
610 | ||
a8150a88 | 611 | (void) frag_align_code (align, 0); |
ab3e48dc | 612 | for (; syms != (sym_linkS *) 0; syms = next_syms) |
252b5132 RH |
613 | { |
614 | symbolS *symbolP = syms->symbol; | |
615 | next_syms = syms->next; | |
47990a6a | 616 | input_line_pointer = (char *) ".\n"; |
252b5132 | 617 | pseudo_set (symbolP); |
ab3e48dc | 618 | free ((char *) syms); |
252b5132 RH |
619 | } |
620 | ||
621 | input_line_pointer = save_input_line; | |
622 | } | |
623 | ||
88845958 | 624 | void |
ea1562b3 | 625 | m32r_flush_pending_output (void) |
88845958 NC |
626 | { |
627 | if (debug_sym_link) | |
628 | { | |
629 | expand_debug_syms (debug_sym_link, 1); | |
630 | debug_sym_link = (sym_linkS *) 0; | |
631 | } | |
632 | } | |
633 | ||
252b5132 RH |
634 | /* Cover function to fill_insn called after a label and at end of assembly. |
635 | The result is always 1: we're called in a conditional to see if the | |
636 | current line is a label. */ | |
637 | ||
638 | int | |
ea1562b3 | 639 | m32r_fill_insn (int done) |
252b5132 RH |
640 | { |
641 | if (prev_seg != NULL) | |
642 | { | |
ab3e48dc | 643 | segT seg = now_seg; |
252b5132 RH |
644 | subsegT subseg = now_subseg; |
645 | ||
646 | subseg_set (prev_seg, prev_subseg); | |
ab3e48dc | 647 | |
252b5132 RH |
648 | fill_insn (0); |
649 | ||
650 | subseg_set (seg, subseg); | |
651 | } | |
652 | ||
653 | if (done && debug_sym_link) | |
654 | { | |
655 | expand_debug_syms (debug_sym_link, 1); | |
ab3e48dc | 656 | debug_sym_link = (sym_linkS *) 0; |
252b5132 RH |
657 | } |
658 | ||
659 | return 1; | |
660 | } | |
661 | \f | |
88845958 NC |
662 | /* The default target format to use. */ |
663 | ||
664 | const char * | |
ea1562b3 | 665 | m32r_target_format (void) |
88845958 NC |
666 | { |
667 | #ifdef TE_LINUX | |
668 | if (target_big_endian) | |
669 | return "elf32-m32r-linux"; | |
670 | else | |
671 | return "elf32-m32rle-linux"; | |
672 | #else | |
673 | if (target_big_endian) | |
674 | return "elf32-m32r"; | |
675 | else | |
676 | return "elf32-m32rle"; | |
677 | #endif | |
678 | } | |
679 | ||
252b5132 | 680 | void |
ea1562b3 | 681 | md_begin (void) |
252b5132 RH |
682 | { |
683 | flagword applicable; | |
ab3e48dc KH |
684 | segT seg; |
685 | subsegT subseg; | |
252b5132 RH |
686 | |
687 | /* Initialize the `cgen' interface. */ | |
ab3e48dc | 688 | |
252b5132 RH |
689 | /* Set the machine number and endian. */ |
690 | gas_cgen_cpu_desc = m32r_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0, | |
691 | CGEN_CPU_OPEN_ENDIAN, | |
88845958 NC |
692 | (target_big_endian ? |
693 | CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE), | |
252b5132 RH |
694 | CGEN_CPU_OPEN_END); |
695 | m32r_cgen_init_asm (gas_cgen_cpu_desc); | |
696 | ||
697 | /* The operand instance table is used during optimization to determine | |
698 | which insns can be executed in parallel. It is also used to give | |
699 | warnings regarding operand interference in parallel insns. */ | |
700 | m32r_cgen_init_opinst_table (gas_cgen_cpu_desc); | |
701 | ||
702 | /* This is a callback from cgen to gas to parse operands. */ | |
703 | cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand); | |
704 | ||
252b5132 RH |
705 | /* Save the current subseg so we can restore it [it's the default one and |
706 | we don't want the initial section to be .sbss]. */ | |
707 | seg = now_seg; | |
708 | subseg = now_subseg; | |
709 | ||
710 | /* The sbss section is for local .scomm symbols. */ | |
711 | sbss_section = subseg_new (".sbss", 0); | |
71ac351c | 712 | seg_info (sbss_section)->bss = 1; |
ab3e48dc | 713 | |
252b5132 RH |
714 | /* This is copied from perform_an_assembly_pass. */ |
715 | applicable = bfd_applicable_section_flags (stdoutput); | |
716 | bfd_set_section_flags (stdoutput, sbss_section, applicable & SEC_ALLOC); | |
ab3e48dc | 717 | |
252b5132 RH |
718 | subseg_set (seg, subseg); |
719 | ||
720 | /* We must construct a fake section similar to bfd_com_section | |
721 | but with the name .scommon. */ | |
45dfa85a | 722 | scom_section = *bfd_com_section_ptr; |
252b5132 | 723 | scom_section.name = ".scommon"; |
ea1562b3 NC |
724 | scom_section.output_section = & scom_section; |
725 | scom_section.symbol = & scom_symbol; | |
726 | scom_section.symbol_ptr_ptr = & scom_section.symbol; | |
45dfa85a | 727 | scom_symbol = * bfd_com_section_ptr->symbol; |
252b5132 | 728 | scom_symbol.name = ".scommon"; |
ea1562b3 | 729 | scom_symbol.section = & scom_section; |
252b5132 | 730 | |
925c058e | 731 | allow_m32rx (enable_m32rx); |
002de68b | 732 | |
07726851 | 733 | gas_cgen_initialize_saved_fixups_array (); |
925c058e DE |
734 | } |
735 | ||
736 | #define OPERAND_IS_COND_BIT(operand, indices, index) \ | |
737 | ((operand)->hw_type == HW_H_COND \ | |
738 | || ((operand)->hw_type == HW_H_PSW) \ | |
739 | || ((operand)->hw_type == HW_H_CR \ | |
740 | && (indices [index] == 0 || indices [index] == 1))) | |
741 | ||
742 | /* Returns true if an output of instruction 'a' is referenced by an operand | |
743 | of instruction 'b'. If 'check_outputs' is true then b's outputs are | |
744 | checked, otherwise its inputs are examined. */ | |
745 | ||
746 | static int | |
ea1562b3 NC |
747 | first_writes_to_seconds_operands (m32r_insn *a, |
748 | m32r_insn *b, | |
749 | const int check_outputs) | |
925c058e | 750 | { |
ab3e48dc KH |
751 | const CGEN_OPINST *a_operands = CGEN_INSN_OPERANDS (a->insn); |
752 | const CGEN_OPINST *b_ops = CGEN_INSN_OPERANDS (b->insn); | |
925c058e DE |
753 | int a_index; |
754 | ||
b145f546 NC |
755 | if (ignore_parallel_conflicts) |
756 | return 0; | |
757 | ||
925c058e DE |
758 | /* If at least one of the instructions takes no operands, then there is |
759 | nothing to check. There really are instructions without operands, | |
760 | eg 'nop'. */ | |
761 | if (a_operands == NULL || b_ops == NULL) | |
762 | return 0; | |
ab3e48dc | 763 | |
925c058e DE |
764 | /* Scan the operand list of 'a' looking for an output operand. */ |
765 | for (a_index = 0; | |
766 | a_operands->type != CGEN_OPINST_END; | |
767 | a_index ++, a_operands ++) | |
768 | { | |
769 | if (a_operands->type == CGEN_OPINST_OUTPUT) | |
770 | { | |
771 | int b_index; | |
ab3e48dc | 772 | const CGEN_OPINST *b_operands = b_ops; |
925c058e DE |
773 | |
774 | /* Special Case: | |
775 | The Condition bit 'C' is a shadow of the CBR register (control | |
776 | register 1) and also a shadow of bit 31 of the program status | |
777 | word (control register 0). For now this is handled here, rather | |
ab3e48dc KH |
778 | than by cgen.... */ |
779 | ||
925c058e DE |
780 | if (OPERAND_IS_COND_BIT (a_operands, a->indices, a_index)) |
781 | { | |
782 | /* Scan operand list of 'b' looking for another reference to the | |
783 | condition bit, which goes in the right direction. */ | |
784 | for (b_index = 0; | |
785 | b_operands->type != CGEN_OPINST_END; | |
ab3e48dc | 786 | b_index++, b_operands++) |
925c058e DE |
787 | { |
788 | if ((b_operands->type | |
789 | == (check_outputs | |
790 | ? CGEN_OPINST_OUTPUT | |
791 | : CGEN_OPINST_INPUT)) | |
792 | && OPERAND_IS_COND_BIT (b_operands, b->indices, b_index)) | |
793 | return 1; | |
794 | } | |
795 | } | |
796 | else | |
797 | { | |
798 | /* Scan operand list of 'b' looking for an operand that | |
799 | references the same hardware element, and which goes in the | |
800 | right direction. */ | |
801 | for (b_index = 0; | |
802 | b_operands->type != CGEN_OPINST_END; | |
ab3e48dc | 803 | b_index++, b_operands++) |
925c058e DE |
804 | { |
805 | if ((b_operands->type | |
806 | == (check_outputs | |
807 | ? CGEN_OPINST_OUTPUT | |
808 | : CGEN_OPINST_INPUT)) | |
809 | && (b_operands->hw_type == a_operands->hw_type) | |
ab3e48dc | 810 | && (a->indices[a_index] == b->indices[b_index])) |
925c058e DE |
811 | return 1; |
812 | } | |
813 | } | |
814 | } | |
815 | } | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
820 | /* Returns true if the insn can (potentially) alter the program counter. */ | |
821 | ||
822 | static int | |
ea1562b3 | 823 | writes_to_pc (m32r_insn *a) |
925c058e | 824 | { |
925c058e DE |
825 | if (CGEN_INSN_ATTR_VALUE (a->insn, CGEN_INSN_UNCOND_CTI) |
826 | || CGEN_INSN_ATTR_VALUE (a->insn, CGEN_INSN_COND_CTI)) | |
827 | return 1; | |
925c058e DE |
828 | return 0; |
829 | } | |
830 | ||
ab3e48dc KH |
831 | /* Return NULL if the two 16 bit insns can be executed in parallel. |
832 | Otherwise return a pointer to an error message explaining why not. */ | |
925c058e DE |
833 | |
834 | static const char * | |
ea1562b3 | 835 | can_make_parallel (m32r_insn *a, m32r_insn *b) |
925c058e DE |
836 | { |
837 | PIPE_ATTR a_pipe; | |
838 | PIPE_ATTR b_pipe; | |
ab3e48dc | 839 | |
925c058e | 840 | /* Make sure the instructions are the right length. */ |
ab3e48dc KH |
841 | if (CGEN_FIELDS_BITSIZE (&a->fields) != 16 |
842 | || CGEN_FIELDS_BITSIZE (&b->fields) != 16) | |
843 | abort (); | |
925c058e | 844 | |
b34976b6 | 845 | if (first_writes_to_seconds_operands (a, b, TRUE)) |
b145f546 | 846 | return _("instructions write to the same destination register."); |
ab3e48dc | 847 | |
925c058e DE |
848 | a_pipe = CGEN_INSN_ATTR_VALUE (a->insn, CGEN_INSN_PIPE); |
849 | b_pipe = CGEN_INSN_ATTR_VALUE (b->insn, CGEN_INSN_PIPE); | |
850 | ||
851 | /* Make sure that the instructions use the correct execution pipelines. */ | |
ab3e48dc | 852 | if (a_pipe == PIPE_NONE |
925c058e DE |
853 | || b_pipe == PIPE_NONE) |
854 | return _("Instructions do not use parallel execution pipelines."); | |
855 | ||
856 | /* Leave this test for last, since it is the only test that can | |
857 | go away if the instructions are swapped, and we want to make | |
858 | sure that any other errors are detected before this happens. */ | |
ab3e48dc | 859 | if (a_pipe == PIPE_S |
88845958 NC |
860 | || b_pipe == PIPE_O |
861 | || (b_pipe == PIPE_O_OS && (enable_m32rx != 2))) | |
925c058e | 862 | return _("Instructions share the same execution pipeline"); |
ab3e48dc | 863 | |
925c058e DE |
864 | return NULL; |
865 | } | |
866 | ||
867 | /* Force the top bit of the second 16-bit insn to be set. */ | |
868 | ||
869 | static void | |
ea1562b3 | 870 | make_parallel (CGEN_INSN_BYTES_PTR buffer) |
925c058e DE |
871 | { |
872 | #if CGEN_INT_INSN_P | |
873 | *buffer |= 0x8000; | |
874 | #else | |
ab3e48dc | 875 | buffer[CGEN_CPU_ENDIAN (gas_cgen_cpu_desc) == CGEN_ENDIAN_BIG ? 0 : 1] |
925c058e DE |
876 | |= 0x80; |
877 | #endif | |
252b5132 RH |
878 | } |
879 | ||
925c058e | 880 | /* Same as make_parallel except buffer contains the bytes in target order. */ |
252b5132 | 881 | |
925c058e | 882 | static void |
ea1562b3 | 883 | target_make_parallel (char *buffer) |
925c058e | 884 | { |
ab3e48dc | 885 | buffer[CGEN_CPU_ENDIAN (gas_cgen_cpu_desc) == CGEN_ENDIAN_BIG ? 0 : 1] |
925c058e DE |
886 | |= 0x80; |
887 | } | |
888 | ||
889 | /* Assemble two instructions with an explicit parallel operation (||) or | |
890 | sequential operation (->). */ | |
891 | ||
892 | static void | |
ea1562b3 | 893 | assemble_two_insns (char *str1, char *str2, int parallel_p) |
925c058e | 894 | { |
ab3e48dc | 895 | char *str3; |
925c058e DE |
896 | m32r_insn first; |
897 | m32r_insn second; | |
ab3e48dc KH |
898 | char *errmsg; |
899 | char save_str2 = *str2; | |
925c058e | 900 | |
67c1ffbe | 901 | /* Separate the two instructions. */ |
ab3e48dc | 902 | *str2 = 0; |
925c058e DE |
903 | |
904 | /* Make sure the two insns begin on a 32 bit boundary. | |
905 | This is also done for the serial case (foo -> bar), relaxing doesn't | |
906 | affect insns written like this. | |
907 | Note that we must always do this as we can't assume anything about | |
908 | whether we're currently on a 32 bit boundary or not. Relaxing may | |
909 | change this. */ | |
910 | fill_insn (0); | |
911 | ||
912 | first.debug_sym_link = debug_sym_link; | |
ab3e48dc | 913 | debug_sym_link = (sym_linkS *) 0; |
925c058e DE |
914 | |
915 | /* Parse the first instruction. */ | |
916 | if (! (first.insn = m32r_cgen_assemble_insn | |
ea1562b3 | 917 | (gas_cgen_cpu_desc, str1, & first.fields, first.buffer, & errmsg))) |
925c058e | 918 | { |
20203fb9 | 919 | as_bad ("%s", errmsg); |
925c058e DE |
920 | return; |
921 | } | |
922 | ||
923 | /* Check it. */ | |
924 | if (CGEN_FIELDS_BITSIZE (&first.fields) != 16) | |
925 | { | |
ab3e48dc | 926 | /* xgettext:c-format */ |
ea1562b3 | 927 | as_bad (_("not a 16 bit instruction '%s'"), str1); |
925c058e DE |
928 | return; |
929 | } | |
88845958 NC |
930 | #ifdef E_M32R2_ARCH |
931 | else if ((enable_m32rx == 1) | |
932 | /* FIXME: Need standard macro to perform this test. */ | |
933 | && ((CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_MACH) | |
934 | & (1 << MACH_M32R2)) | |
935 | && !((CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_MACH) | |
936 | & (1 << MACH_M32RX))))) | |
937 | { | |
938 | /* xgettext:c-format */ | |
ea1562b3 | 939 | as_bad (_("instruction '%s' is for the M32R2 only"), str1); |
88845958 NC |
940 | return; |
941 | } | |
942 | else if ((! enable_special | |
943 | && CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_SPECIAL)) | |
944 | || (! enable_special_m32r | |
945 | && CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_SPECIAL_M32R))) | |
946 | #else | |
925c058e DE |
947 | else if (! enable_special |
948 | && CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_SPECIAL)) | |
88845958 | 949 | #endif |
925c058e | 950 | { |
ab3e48dc | 951 | /* xgettext:c-format */ |
ea1562b3 | 952 | as_bad (_("unknown instruction '%s'"), str1); |
925c058e DE |
953 | return; |
954 | } | |
955 | else if (! enable_m32rx | |
ab3e48dc KH |
956 | /* FIXME: Need standard macro to perform this test. */ |
957 | && (CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_MACH) | |
958 | == (1 << MACH_M32RX))) | |
925c058e | 959 | { |
ab3e48dc | 960 | /* xgettext:c-format */ |
ea1562b3 | 961 | as_bad (_("instruction '%s' is for the M32RX only"), str1); |
925c058e DE |
962 | return; |
963 | } | |
ab3e48dc | 964 | |
925c058e | 965 | /* Check to see if this is an allowable parallel insn. */ |
ab3e48dc KH |
966 | if (parallel_p |
967 | && CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_PIPE) == PIPE_NONE) | |
925c058e | 968 | { |
ab3e48dc | 969 | /* xgettext:c-format */ |
ea1562b3 | 970 | as_bad (_("instruction '%s' cannot be executed in parallel."), str1); |
925c058e DE |
971 | return; |
972 | } | |
ab3e48dc KH |
973 | |
974 | /* Restore the original assembly text, just in case it is needed. */ | |
975 | *str2 = save_str2; | |
976 | ||
977 | /* Save the original string pointer. */ | |
ea1562b3 | 978 | str3 = str1; |
ab3e48dc KH |
979 | |
980 | /* Advanced past the parsed string. */ | |
ea1562b3 | 981 | str1 = str2 + 2; |
ab3e48dc KH |
982 | |
983 | /* Remember the entire string in case it is needed for error | |
984 | messages. */ | |
985 | str2 = str3; | |
925c058e DE |
986 | |
987 | /* Convert the opcode to lower case. */ | |
988 | { | |
ea1562b3 | 989 | char *s2 = str1; |
ab3e48dc | 990 | |
3882b010 | 991 | while (ISSPACE (*s2++)) |
925c058e DE |
992 | continue; |
993 | ||
994 | --s2; | |
995 | ||
3882b010 | 996 | while (ISALNUM (*s2)) |
925c058e | 997 | { |
3882b010 | 998 | *s2 = TOLOWER (*s2); |
ab3e48dc | 999 | s2++; |
925c058e DE |
1000 | } |
1001 | } | |
ab3e48dc KH |
1002 | |
1003 | /* Preserve any fixups that have been generated and reset the list | |
1004 | to empty. */ | |
002de68b | 1005 | gas_cgen_save_fixups (0); |
925c058e DE |
1006 | |
1007 | /* Get the indices of the operands of the instruction. */ | |
1008 | /* FIXME: CGEN_FIELDS is already recorded, but relying on that fact | |
1009 | doesn't seem right. Perhaps allow passing fields like we do insn. */ | |
1010 | /* FIXME: ALIAS insns do not have operands, so we use this function | |
1011 | to find the equivalent insn and overwrite the value stored in our | |
1012 | structure. We still need the original insn, however, since this | |
1013 | may have certain attributes that are not present in the unaliased | |
1014 | version (eg relaxability). When aliases behave differently this | |
1015 | may have to change. */ | |
1016 | first.orig_insn = first.insn; | |
1017 | { | |
1018 | CGEN_FIELDS tmp_fields; | |
1019 | first.insn = cgen_lookup_get_insn_operands | |
1020 | (gas_cgen_cpu_desc, NULL, INSN_VALUE (first.buffer), NULL, 16, | |
1021 | first.indices, &tmp_fields); | |
1022 | } | |
ab3e48dc | 1023 | |
925c058e DE |
1024 | if (first.insn == NULL) |
1025 | as_fatal (_("internal error: lookup/get operands failed")); | |
1026 | ||
1027 | second.debug_sym_link = NULL; | |
1028 | ||
1029 | /* Parse the second instruction. */ | |
1030 | if (! (second.insn = m32r_cgen_assemble_insn | |
ea1562b3 | 1031 | (gas_cgen_cpu_desc, str1, & second.fields, second.buffer, & errmsg))) |
925c058e | 1032 | { |
20203fb9 | 1033 | as_bad ("%s", errmsg); |
925c058e DE |
1034 | return; |
1035 | } | |
1036 | ||
1037 | /* Check it. */ | |
1038 | if (CGEN_FIELDS_BITSIZE (&second.fields) != 16) | |
1039 | { | |
ab3e48dc | 1040 | /* xgettext:c-format */ |
ea1562b3 | 1041 | as_bad (_("not a 16 bit instruction '%s'"), str1); |
925c058e DE |
1042 | return; |
1043 | } | |
88845958 NC |
1044 | #ifdef E_M32R2_ARCH |
1045 | else if ((enable_m32rx == 1) | |
1046 | /* FIXME: Need standard macro to perform this test. */ | |
1047 | && ((CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_MACH) | |
1048 | & (1 << MACH_M32R2)) | |
1049 | && !((CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_MACH) | |
1050 | & (1 << MACH_M32RX))))) | |
1051 | { | |
1052 | /* xgettext:c-format */ | |
ea1562b3 | 1053 | as_bad (_("instruction '%s' is for the M32R2 only"), str1); |
88845958 NC |
1054 | return; |
1055 | } | |
1056 | else if ((! enable_special | |
1057 | && CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_SPECIAL)) | |
1058 | || (! enable_special_m32r | |
1059 | && CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_SPECIAL_M32R))) | |
1060 | #else | |
925c058e DE |
1061 | else if (! enable_special |
1062 | && CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_SPECIAL)) | |
88845958 | 1063 | #endif |
925c058e | 1064 | { |
ab3e48dc | 1065 | /* xgettext:c-format */ |
ea1562b3 | 1066 | as_bad (_("unknown instruction '%s'"), str1); |
925c058e DE |
1067 | return; |
1068 | } | |
1069 | else if (! enable_m32rx | |
1070 | && CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_MACH) == (1 << MACH_M32RX)) | |
1071 | { | |
ab3e48dc | 1072 | /* xgettext:c-format */ |
ea1562b3 | 1073 | as_bad (_("instruction '%s' is for the M32RX only"), str1); |
925c058e DE |
1074 | return; |
1075 | } | |
1076 | ||
1077 | /* Check to see if this is an allowable parallel insn. */ | |
ab3e48dc KH |
1078 | if (parallel_p |
1079 | && CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_PIPE) == PIPE_NONE) | |
925c058e | 1080 | { |
ab3e48dc | 1081 | /* xgettext:c-format */ |
ea1562b3 | 1082 | as_bad (_("instruction '%s' cannot be executed in parallel."), str1); |
925c058e DE |
1083 | return; |
1084 | } | |
ab3e48dc | 1085 | |
925c058e DE |
1086 | if (parallel_p && ! enable_m32rx) |
1087 | { | |
1088 | if (CGEN_INSN_NUM (first.insn) != M32R_INSN_NOP | |
1089 | && CGEN_INSN_NUM (second.insn) != M32R_INSN_NOP) | |
1090 | { | |
ab3e48dc | 1091 | /* xgettext:c-format */ |
925c058e DE |
1092 | as_bad (_("'%s': only the NOP instruction can be issued in parallel on the m32r"), str2); |
1093 | return; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | /* Get the indices of the operands of the instruction. */ | |
1098 | second.orig_insn = second.insn; | |
1099 | { | |
1100 | CGEN_FIELDS tmp_fields; | |
1101 | second.insn = cgen_lookup_get_insn_operands | |
1102 | (gas_cgen_cpu_desc, NULL, INSN_VALUE (second.buffer), NULL, 16, | |
1103 | second.indices, &tmp_fields); | |
1104 | } | |
ab3e48dc | 1105 | |
925c058e DE |
1106 | if (second.insn == NULL) |
1107 | as_fatal (_("internal error: lookup/get operands failed")); | |
1108 | ||
1109 | /* We assume that if the first instruction writes to a register that is | |
1110 | read by the second instruction it is because the programmer intended | |
1111 | this to happen, (after all they have explicitly requested that these | |
1112 | two instructions be executed in parallel). Although if the global | |
1113 | variable warn_explicit_parallel_conflicts is true then we do generate | |
1114 | a warning message. Similarly we assume that parallel branch and jump | |
1115 | instructions are deliberate and should not produce errors. */ | |
ab3e48dc | 1116 | |
925c058e DE |
1117 | if (parallel_p && warn_explicit_parallel_conflicts) |
1118 | { | |
b34976b6 | 1119 | if (first_writes_to_seconds_operands (&first, &second, FALSE)) |
ab3e48dc | 1120 | /* xgettext:c-format */ |
b145f546 | 1121 | as_warn (_("%s: output of 1st instruction is the same as an input to 2nd instruction - is this intentional ?"), str2); |
ab3e48dc | 1122 | |
b34976b6 | 1123 | if (first_writes_to_seconds_operands (&second, &first, FALSE)) |
ab3e48dc | 1124 | /* xgettext:c-format */ |
b145f546 | 1125 | as_warn (_("%s: output of 2nd instruction is the same as an input to 1st instruction - is this intentional ?"), str2); |
925c058e | 1126 | } |
ab3e48dc | 1127 | |
925c058e | 1128 | if (!parallel_p |
ab3e48dc | 1129 | || (errmsg = (char *) can_make_parallel (&first, &second)) == NULL) |
925c058e DE |
1130 | { |
1131 | /* Get the fixups for the first instruction. */ | |
002de68b | 1132 | gas_cgen_swap_fixups (0); |
925c058e DE |
1133 | |
1134 | /* Write it out. */ | |
1135 | expand_debug_syms (first.debug_sym_link, 1); | |
1136 | gas_cgen_finish_insn (first.orig_insn, first.buffer, | |
ab3e48dc KH |
1137 | CGEN_FIELDS_BITSIZE (&first.fields), 0, NULL); |
1138 | ||
925c058e DE |
1139 | /* Force the top bit of the second insn to be set. */ |
1140 | if (parallel_p) | |
1141 | make_parallel (second.buffer); | |
1142 | ||
1143 | /* Get its fixups. */ | |
002de68b | 1144 | gas_cgen_restore_fixups (0); |
925c058e DE |
1145 | |
1146 | /* Write it out. */ | |
1147 | expand_debug_syms (second.debug_sym_link, 1); | |
1148 | gas_cgen_finish_insn (second.orig_insn, second.buffer, | |
ab3e48dc | 1149 | CGEN_FIELDS_BITSIZE (&second.fields), 0, NULL); |
925c058e DE |
1150 | } |
1151 | /* Try swapping the instructions to see if they work that way. */ | |
ab3e48dc | 1152 | else if (can_make_parallel (&second, &first) == NULL) |
925c058e DE |
1153 | { |
1154 | /* Write out the second instruction first. */ | |
1155 | expand_debug_syms (second.debug_sym_link, 1); | |
1156 | gas_cgen_finish_insn (second.orig_insn, second.buffer, | |
ab3e48dc KH |
1157 | CGEN_FIELDS_BITSIZE (&second.fields), 0, NULL); |
1158 | ||
925c058e DE |
1159 | /* Force the top bit of the first instruction to be set. */ |
1160 | make_parallel (first.buffer); | |
1161 | ||
1162 | /* Get the fixups for the first instruction. */ | |
002de68b | 1163 | gas_cgen_restore_fixups (0); |
925c058e DE |
1164 | |
1165 | /* Write out the first instruction. */ | |
1166 | expand_debug_syms (first.debug_sym_link, 1); | |
1167 | gas_cgen_finish_insn (first.orig_insn, first.buffer, | |
ab3e48dc | 1168 | CGEN_FIELDS_BITSIZE (&first.fields), 0, NULL); |
925c058e DE |
1169 | } |
1170 | else | |
1171 | { | |
1172 | as_bad ("'%s': %s", str2, errmsg); | |
1173 | return; | |
1174 | } | |
ab3e48dc | 1175 | |
88845958 NC |
1176 | if (CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_SPECIAL) |
1177 | || CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_SPECIAL)) | |
1178 | m32r_flags |= E_M32R_HAS_HIDDEN_INST; | |
1179 | if (CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_SPECIAL_M32R) | |
1180 | || CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_SPECIAL_M32R)) | |
1181 | m32r_flags |= E_M32R_HAS_BIT_INST; | |
1182 | if (CGEN_INSN_ATTR_VALUE (first.insn, CGEN_INSN_SPECIAL_FLOAT) | |
1183 | || CGEN_INSN_ATTR_VALUE (second.insn, CGEN_INSN_SPECIAL_FLOAT)) | |
1184 | m32r_flags |= E_M32R_HAS_FLOAT_INST; | |
1185 | ||
925c058e DE |
1186 | /* Set these so m32r_fill_insn can use them. */ |
1187 | prev_seg = now_seg; | |
1188 | prev_subseg = now_subseg; | |
1189 | } | |
252b5132 RH |
1190 | |
1191 | void | |
ea1562b3 | 1192 | md_assemble (char *str) |
252b5132 RH |
1193 | { |
1194 | m32r_insn insn; | |
ab3e48dc KH |
1195 | char *errmsg; |
1196 | char *str2 = NULL; | |
252b5132 RH |
1197 | |
1198 | /* Initialize GAS's cgen interface for a new instruction. */ | |
1199 | gas_cgen_init_parse (); | |
1200 | ||
67c1ffbe | 1201 | /* Look for a parallel instruction separator. */ |
925c058e DE |
1202 | if ((str2 = strstr (str, "||")) != NULL) |
1203 | { | |
1204 | assemble_two_insns (str, str2, 1); | |
88845958 | 1205 | m32r_flags |= E_M32R_HAS_PARALLEL; |
925c058e DE |
1206 | return; |
1207 | } | |
1208 | ||
67c1ffbe | 1209 | /* Also look for a sequential instruction separator. */ |
925c058e DE |
1210 | if ((str2 = strstr (str, "->")) != NULL) |
1211 | { | |
1212 | assemble_two_insns (str, str2, 0); | |
1213 | return; | |
1214 | } | |
ab3e48dc | 1215 | |
252b5132 | 1216 | insn.debug_sym_link = debug_sym_link; |
ab3e48dc | 1217 | debug_sym_link = (sym_linkS *) 0; |
252b5132 RH |
1218 | |
1219 | insn.insn = m32r_cgen_assemble_insn | |
ab3e48dc KH |
1220 | (gas_cgen_cpu_desc, str, &insn.fields, insn.buffer, & errmsg); |
1221 | ||
252b5132 RH |
1222 | if (!insn.insn) |
1223 | { | |
20203fb9 | 1224 | as_bad ("%s", errmsg); |
252b5132 RH |
1225 | return; |
1226 | } | |
1227 | ||
88845958 NC |
1228 | #ifdef E_M32R2_ARCH |
1229 | if ((enable_m32rx == 1) | |
1230 | /* FIXME: Need standard macro to perform this test. */ | |
1231 | && ((CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_MACH) | |
1232 | & (1 << MACH_M32R2)) | |
1233 | && !((CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_MACH) | |
1234 | & (1 << MACH_M32RX))))) | |
1235 | { | |
1236 | /* xgettext:c-format */ | |
1237 | as_bad (_("instruction '%s' is for the M32R2 only"), str); | |
1238 | return; | |
1239 | } | |
1240 | else if ((! enable_special | |
1241 | && CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_SPECIAL)) | |
1242 | || (! enable_special_m32r | |
1243 | && CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_SPECIAL_M32R))) | |
1244 | #else | |
925c058e DE |
1245 | if (! enable_special |
1246 | && CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_SPECIAL)) | |
88845958 | 1247 | #endif |
925c058e | 1248 | { |
ab3e48dc | 1249 | /* xgettext:c-format */ |
925c058e DE |
1250 | as_bad (_("unknown instruction '%s'"), str); |
1251 | return; | |
1252 | } | |
1253 | else if (! enable_m32rx | |
1254 | && CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_MACH) == (1 << MACH_M32RX)) | |
1255 | { | |
ab3e48dc | 1256 | /* xgettext:c-format */ |
925c058e DE |
1257 | as_bad (_("instruction '%s' is for the M32RX only"), str); |
1258 | return; | |
1259 | } | |
ab3e48dc | 1260 | |
88845958 NC |
1261 | if (CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_SPECIAL)) |
1262 | m32r_flags |= E_M32R_HAS_HIDDEN_INST; | |
1263 | if (CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_SPECIAL_M32R)) | |
1264 | m32r_flags |= E_M32R_HAS_BIT_INST; | |
1265 | if (CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_SPECIAL_FLOAT)) | |
1266 | m32r_flags |= E_M32R_HAS_FLOAT_INST; | |
1267 | ||
252b5132 RH |
1268 | if (CGEN_INSN_BITSIZE (insn.insn) == 32) |
1269 | { | |
1270 | /* 32 bit insns must live on 32 bit boundaries. */ | |
1271 | if (prev_insn.insn || seen_relaxable_p) | |
1272 | { | |
1273 | /* ??? If calling fill_insn too many times turns us into a memory | |
1274 | pig, can we call a fn to assemble a nop instead of | |
1275 | !seen_relaxable_p? */ | |
1276 | fill_insn (0); | |
1277 | } | |
1278 | ||
1279 | expand_debug_syms (insn.debug_sym_link, 2); | |
1280 | ||
1281 | /* Doesn't really matter what we pass for RELAX_P here. */ | |
1282 | gas_cgen_finish_insn (insn.insn, insn.buffer, | |
ab3e48dc | 1283 | CGEN_FIELDS_BITSIZE (&insn.fields), 1, NULL); |
252b5132 RH |
1284 | } |
1285 | else | |
1286 | { | |
1287 | int on_32bit_boundary_p; | |
b34976b6 | 1288 | int swap = FALSE; |
252b5132 RH |
1289 | |
1290 | if (CGEN_INSN_BITSIZE (insn.insn) != 16) | |
ab3e48dc | 1291 | abort (); |
252b5132 RH |
1292 | |
1293 | insn.orig_insn = insn.insn; | |
1294 | ||
925c058e DE |
1295 | /* If the previous insn was relaxable, then it may be expanded |
1296 | to fill the current 16 bit slot. Emit a NOP here to occupy | |
1297 | this slot, so that we can start at optimizing at a 32 bit | |
1298 | boundary. */ | |
1299 | if (prev_insn.insn && seen_relaxable_p && optimize) | |
1300 | fill_insn (0); | |
ab3e48dc | 1301 | |
925c058e DE |
1302 | if (enable_m32rx) |
1303 | { | |
1304 | /* Get the indices of the operands of the instruction. | |
1305 | FIXME: See assemble_parallel for notes on orig_insn. */ | |
1306 | { | |
1307 | CGEN_FIELDS tmp_fields; | |
1308 | insn.insn = cgen_lookup_get_insn_operands | |
1309 | (gas_cgen_cpu_desc, NULL, INSN_VALUE (insn.buffer), NULL, | |
1310 | 16, insn.indices, &tmp_fields); | |
1311 | } | |
ab3e48dc | 1312 | |
925c058e DE |
1313 | if (insn.insn == NULL) |
1314 | as_fatal (_("internal error: lookup/get operands failed")); | |
1315 | } | |
1316 | ||
252b5132 RH |
1317 | /* Compute whether we're on a 32 bit boundary or not. |
1318 | prev_insn.insn is NULL when we're on a 32 bit boundary. */ | |
1319 | on_32bit_boundary_p = prev_insn.insn == NULL; | |
1320 | ||
097dba13 NC |
1321 | /* Change a frag to, if each insn to swap is in a different frag. |
1322 | It must keep only one instruction in a frag. */ | |
1323 | if (parallel() && on_32bit_boundary_p) | |
1324 | { | |
1325 | frag_wane (frag_now); | |
1326 | frag_new (0); | |
1327 | } | |
1328 | ||
925c058e DE |
1329 | /* Look to see if this instruction can be combined with the |
1330 | previous instruction to make one, parallel, 32 bit instruction. | |
1331 | If the previous instruction (potentially) changed the flow of | |
1332 | program control, then it cannot be combined with the current | |
1333 | instruction. If the current instruction is relaxable, then it | |
1334 | might be replaced with a longer version, so we cannot combine it. | |
1335 | Also if the output of the previous instruction is used as an | |
1336 | input to the current instruction then it cannot be combined. | |
1337 | Otherwise call can_make_parallel() with both orderings of the | |
1338 | instructions to see if they can be combined. */ | |
ab3e48dc | 1339 | if (! on_32bit_boundary_p |
88845958 | 1340 | && parallel () |
ab3e48dc KH |
1341 | && CGEN_INSN_ATTR_VALUE (insn.orig_insn, CGEN_INSN_RELAXABLE) == 0 |
1342 | && ! writes_to_pc (&prev_insn) | |
b34976b6 | 1343 | && ! first_writes_to_seconds_operands (&prev_insn, &insn, FALSE)) |
925c058e | 1344 | { |
ab3e48dc | 1345 | if (can_make_parallel (&prev_insn, &insn) == NULL) |
925c058e | 1346 | make_parallel (insn.buffer); |
ab3e48dc | 1347 | else if (can_make_parallel (&insn, &prev_insn) == NULL) |
b34976b6 | 1348 | swap = TRUE; |
925c058e | 1349 | } |
252b5132 RH |
1350 | |
1351 | expand_debug_syms (insn.debug_sym_link, 1); | |
1352 | ||
1353 | { | |
1354 | int i; | |
1355 | finished_insnS fi; | |
1356 | ||
1357 | /* Ensure each pair of 16 bit insns is in the same frag. */ | |
1358 | frag_grow (4); | |
1359 | ||
1360 | gas_cgen_finish_insn (insn.orig_insn, insn.buffer, | |
ab3e48dc KH |
1361 | CGEN_FIELDS_BITSIZE (&insn.fields), |
1362 | 1 /* relax_p */, &fi); | |
252b5132 RH |
1363 | insn.addr = fi.addr; |
1364 | insn.frag = fi.frag; | |
1365 | insn.num_fixups = fi.num_fixups; | |
1366 | for (i = 0; i < fi.num_fixups; ++i) | |
1367 | insn.fixups[i] = fi.fixups[i]; | |
1368 | } | |
1369 | ||
925c058e DE |
1370 | if (swap) |
1371 | { | |
ab3e48dc | 1372 | int i, tmp; |
925c058e DE |
1373 | |
1374 | #define SWAP_BYTES(a,b) tmp = a; a = b; b = tmp | |
1375 | ||
1376 | /* Swap the two insns */ | |
ab3e48dc KH |
1377 | SWAP_BYTES (prev_insn.addr[0], insn.addr[0]); |
1378 | SWAP_BYTES (prev_insn.addr[1], insn.addr[1]); | |
925c058e DE |
1379 | |
1380 | target_make_parallel (insn.addr); | |
1381 | ||
1382 | /* Swap any relaxable frags recorded for the two insns. */ | |
1383 | /* FIXME: Clarify. relaxation precludes parallel insns */ | |
1384 | if (prev_insn.frag->fr_opcode == prev_insn.addr) | |
1385 | prev_insn.frag->fr_opcode = insn.addr; | |
1386 | else if (insn.frag->fr_opcode == insn.addr) | |
1387 | insn.frag->fr_opcode = prev_insn.addr; | |
1388 | ||
097dba13 NC |
1389 | /* Change a frag to, if each insn is in a different frag. |
1390 | It must keep only one instruction in a frag. */ | |
1391 | if (prev_insn.frag != insn.frag) | |
1392 | { | |
1393 | for (i = 0; i < prev_insn.num_fixups; ++i) | |
1394 | prev_insn.fixups[i]->fx_frag = insn.frag; | |
1395 | for (i = 0; i < insn.num_fixups; ++i) | |
1396 | insn.fixups[i]->fx_frag = prev_insn.frag; | |
1397 | } | |
1398 | else | |
1399 | { | |
1400 | /* Update the addresses in any fixups. | |
1401 | Note that we don't have to handle the case where each insn is in | |
1402 | a different frag as we ensure they're in the same frag above. */ | |
1403 | for (i = 0; i < prev_insn.num_fixups; ++i) | |
1404 | prev_insn.fixups[i]->fx_where += 2; | |
1405 | for (i = 0; i < insn.num_fixups; ++i) | |
1406 | insn.fixups[i]->fx_where -= 2; | |
1407 | } | |
925c058e | 1408 | } |
252b5132 RH |
1409 | |
1410 | /* Keep track of whether we've seen a pair of 16 bit insns. | |
1411 | prev_insn.insn is NULL when we're on a 32 bit boundary. */ | |
1412 | if (on_32bit_boundary_p) | |
1413 | prev_insn = insn; | |
1414 | else | |
1415 | prev_insn.insn = NULL; | |
ab3e48dc | 1416 | |
252b5132 RH |
1417 | /* If the insn needs the following one to be on a 32 bit boundary |
1418 | (e.g. subroutine calls), fill this insn's slot. */ | |
1419 | if (on_32bit_boundary_p | |
1420 | && CGEN_INSN_ATTR_VALUE (insn.orig_insn, CGEN_INSN_FILL_SLOT) != 0) | |
1421 | fill_insn (0); | |
1422 | ||
1423 | /* If this is a relaxable insn (can be replaced with a larger version) | |
1424 | mark the fact so that we can emit an alignment directive for a | |
1425 | following 32 bit insn if we see one. */ | |
1426 | if (CGEN_INSN_ATTR_VALUE (insn.orig_insn, CGEN_INSN_RELAXABLE) != 0) | |
1427 | seen_relaxable_p = 1; | |
1428 | } | |
1429 | ||
1430 | /* Set these so m32r_fill_insn can use them. */ | |
1431 | prev_seg = now_seg; | |
1432 | prev_subseg = now_subseg; | |
1433 | } | |
1434 | ||
1435 | /* The syntax in the manual says constants begin with '#'. | |
1436 | We just ignore it. */ | |
1437 | ||
ab3e48dc | 1438 | void |
ea1562b3 | 1439 | md_operand (expressionS *expressionP) |
252b5132 | 1440 | { |
ab3e48dc | 1441 | if (*input_line_pointer == '#') |
252b5132 | 1442 | { |
ab3e48dc | 1443 | input_line_pointer++; |
252b5132 RH |
1444 | expression (expressionP); |
1445 | } | |
1446 | } | |
1447 | ||
1448 | valueT | |
ea1562b3 | 1449 | md_section_align (segT segment, valueT size) |
252b5132 RH |
1450 | { |
1451 | int align = bfd_get_section_alignment (stdoutput, segment); | |
ea1562b3 | 1452 | |
8d3842cd | 1453 | return ((size + (1 << align) - 1) & -(1 << align)); |
252b5132 RH |
1454 | } |
1455 | ||
1456 | symbolS * | |
ea1562b3 | 1457 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
252b5132 RH |
1458 | { |
1459 | return 0; | |
1460 | } | |
1461 | \f | |
1462 | /* .scomm pseudo-op handler. | |
1463 | ||
1464 | This is a new pseudo-op to handle putting objects in .scommon. | |
ab3e48dc KH |
1465 | By doing this the linker won't need to do any work, |
1466 | and more importantly it removes the implicit -G arg necessary to | |
1467 | correctly link the object file. */ | |
252b5132 RH |
1468 | |
1469 | static void | |
ea1562b3 | 1470 | m32r_scomm (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 1471 | { |
ea1562b3 NC |
1472 | char *name; |
1473 | char c; | |
1474 | char *p; | |
ab3e48dc | 1475 | offsetT size; |
ea1562b3 | 1476 | symbolS *symbolP; |
ab3e48dc KH |
1477 | offsetT align; |
1478 | int align2; | |
252b5132 | 1479 | |
d02603dc | 1480 | c = get_symbol_name (&name); |
252b5132 | 1481 | |
ab3e48dc | 1482 | /* Just after name is now '\0'. */ |
252b5132 | 1483 | p = input_line_pointer; |
ab3e48dc | 1484 | *p = c; |
d02603dc | 1485 | SKIP_WHITESPACE_AFTER_NAME (); |
ab3e48dc | 1486 | if (*input_line_pointer != ',') |
252b5132 RH |
1487 | { |
1488 | as_bad (_("Expected comma after symbol-name: rest of line ignored.")); | |
1489 | ignore_rest_of_line (); | |
1490 | return; | |
1491 | } | |
1492 | ||
ab3e48dc KH |
1493 | /* Skip ','. */ |
1494 | input_line_pointer++; | |
252b5132 RH |
1495 | if ((size = get_absolute_expression ()) < 0) |
1496 | { | |
ab3e48dc | 1497 | /* xgettext:c-format */ |
252b5132 RH |
1498 | as_warn (_(".SCOMMon length (%ld.) <0! Ignored."), (long) size); |
1499 | ignore_rest_of_line (); | |
1500 | return; | |
1501 | } | |
1502 | ||
1503 | /* The third argument to .scomm is the alignment. */ | |
ab3e48dc | 1504 | if (*input_line_pointer != ',') |
252b5132 RH |
1505 | align = 8; |
1506 | else | |
1507 | { | |
ab3e48dc | 1508 | ++input_line_pointer; |
252b5132 RH |
1509 | align = get_absolute_expression (); |
1510 | if (align <= 0) | |
1511 | { | |
1512 | as_warn (_("ignoring bad alignment")); | |
1513 | align = 8; | |
1514 | } | |
1515 | } | |
ab3e48dc | 1516 | |
252b5132 RH |
1517 | /* Convert to a power of 2 alignment. */ |
1518 | if (align) | |
1519 | { | |
ab3e48dc | 1520 | for (align2 = 0; (align & 1) == 0; align >>= 1, ++align2) |
252b5132 RH |
1521 | continue; |
1522 | if (align != 1) | |
1523 | { | |
1524 | as_bad (_("Common alignment not a power of 2")); | |
1525 | ignore_rest_of_line (); | |
1526 | return; | |
1527 | } | |
1528 | } | |
1529 | else | |
1530 | align2 = 0; | |
1531 | ||
ab3e48dc | 1532 | *p = 0; |
252b5132 | 1533 | symbolP = symbol_find_or_make (name); |
ab3e48dc | 1534 | *p = c; |
252b5132 RH |
1535 | |
1536 | if (S_IS_DEFINED (symbolP)) | |
1537 | { | |
ab3e48dc | 1538 | /* xgettext:c-format */ |
252b5132 RH |
1539 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), |
1540 | S_GET_NAME (symbolP)); | |
1541 | ignore_rest_of_line (); | |
1542 | return; | |
1543 | } | |
1544 | ||
1545 | if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size) | |
1546 | { | |
ab3e48dc | 1547 | /* xgettext:c-format */ |
252b5132 RH |
1548 | as_bad (_("Length of .scomm \"%s\" is already %ld. Not changed to %ld."), |
1549 | S_GET_NAME (symbolP), | |
1550 | (long) S_GET_VALUE (symbolP), | |
1551 | (long) size); | |
1552 | ||
1553 | ignore_rest_of_line (); | |
1554 | return; | |
1555 | } | |
1556 | ||
f412ead8 | 1557 | if (symbol_get_obj (symbolP)->local) |
252b5132 | 1558 | { |
ab3e48dc KH |
1559 | segT old_sec = now_seg; |
1560 | int old_subsec = now_subseg; | |
1561 | char *pfrag; | |
252b5132 RH |
1562 | |
1563 | record_alignment (sbss_section, align2); | |
1564 | subseg_set (sbss_section, 0); | |
ab3e48dc | 1565 | |
252b5132 RH |
1566 | if (align2) |
1567 | frag_align (align2, 0, 0); | |
ab3e48dc | 1568 | |
252b5132 | 1569 | if (S_GET_SEGMENT (symbolP) == sbss_section) |
f412ead8 | 1570 | symbol_get_frag (symbolP)->fr_symbol = 0; |
ab3e48dc | 1571 | |
f412ead8 | 1572 | symbol_set_frag (symbolP, frag_now); |
ab3e48dc | 1573 | |
252b5132 RH |
1574 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size, |
1575 | (char *) 0); | |
ab3e48dc | 1576 | *pfrag = 0; |
252b5132 RH |
1577 | S_SET_SIZE (symbolP, size); |
1578 | S_SET_SEGMENT (symbolP, sbss_section); | |
1579 | S_CLEAR_EXTERNAL (symbolP); | |
1580 | subseg_set (old_sec, old_subsec); | |
1581 | } | |
1582 | else | |
1583 | { | |
1584 | S_SET_VALUE (symbolP, (valueT) size); | |
1585 | S_SET_ALIGN (symbolP, align2); | |
1586 | S_SET_EXTERNAL (symbolP); | |
ab3e48dc | 1587 | S_SET_SEGMENT (symbolP, &scom_section); |
252b5132 RH |
1588 | } |
1589 | ||
1590 | demand_empty_rest_of_line (); | |
1591 | } | |
ea1562b3 NC |
1592 | |
1593 | /* The target specific pseudo-ops which we support. */ | |
1594 | const pseudo_typeS md_pseudo_table[] = | |
1595 | { | |
1596 | { "word", cons, 4 }, | |
1597 | { "fillinsn", fill_insn, 0 }, | |
1598 | { "scomm", m32r_scomm, 0 }, | |
1599 | { "debugsym", debug_sym, 0 }, | |
1600 | { "m32r", allow_m32rx, 0 }, | |
1601 | { "m32rx", allow_m32rx, 1 }, | |
1602 | { "m32r2", allow_m32rx, 2 }, | |
1603 | { "little", little, 1 }, | |
1604 | { "big", little, 0 }, | |
1605 | { NULL, NULL, 0 } | |
1606 | }; | |
252b5132 RH |
1607 | \f |
1608 | /* Interface to relax_segment. */ | |
1609 | ||
1610 | /* FIXME: Build table by hand, get it working, then machine generate. */ | |
1611 | ||
1612 | const relax_typeS md_relax_table[] = | |
1613 | { | |
1614 | /* The fields are: | |
1615 | 1) most positive reach of this state, | |
1616 | 2) most negative reach of this state, | |
1617 | 3) how many bytes this mode will add to the size of the current frag | |
1618 | 4) which index into the table to try if we can't fit into this one. */ | |
1619 | ||
1620 | /* The first entry must be unused because an `rlx_more' value of zero ends | |
1621 | each list. */ | |
1622 | {1, 1, 0, 0}, | |
1623 | ||
1624 | /* The displacement used by GAS is from the end of the 2 byte insn, | |
1625 | so we subtract 2 from the following. */ | |
1626 | /* 16 bit insn, 8 bit disp -> 10 bit range. | |
1627 | This doesn't handle a branch in the right slot at the border: | |
1628 | the "& -4" isn't taken into account. It's not important enough to | |
1629 | complicate things over it, so we subtract an extra 2 (or + 2 in -ve | |
1630 | case). */ | |
1631 | {511 - 2 - 2, -512 - 2 + 2, 0, 2 }, | |
1632 | /* 32 bit insn, 24 bit disp -> 26 bit range. */ | |
1633 | {0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 }, | |
1634 | /* Same thing, but with leading nop for alignment. */ | |
1635 | {0x2000000 - 1 - 2, -0x2000000 - 2, 4, 0 } | |
1636 | }; | |
1637 | ||
1638 | long | |
ea1562b3 | 1639 | m32r_relax_frag (segT segment, fragS *fragP, long stretch) |
252b5132 RH |
1640 | { |
1641 | /* Address of branch insn. */ | |
1642 | long address = fragP->fr_address + fragP->fr_fix - 2; | |
1643 | long growth = 0; | |
1644 | ||
1645 | /* Keep 32 bit insns aligned on 32 bit boundaries. */ | |
1646 | if (fragP->fr_subtype == 2) | |
1647 | { | |
1648 | if ((address & 3) != 0) | |
1649 | { | |
1650 | fragP->fr_subtype = 3; | |
1651 | growth = 2; | |
1652 | } | |
1653 | } | |
1654 | else if (fragP->fr_subtype == 3) | |
1655 | { | |
1656 | if ((address & 3) == 0) | |
1657 | { | |
1658 | fragP->fr_subtype = 2; | |
1659 | growth = -2; | |
1660 | } | |
1661 | } | |
1662 | else | |
1663 | { | |
c842b53a | 1664 | growth = relax_frag (segment, fragP, stretch); |
252b5132 RH |
1665 | |
1666 | /* Long jump on odd halfword boundary? */ | |
1667 | if (fragP->fr_subtype == 2 && (address & 3) != 0) | |
1668 | { | |
1669 | fragP->fr_subtype = 3; | |
1670 | growth += 2; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | return growth; | |
1675 | } | |
1676 | ||
1677 | /* Return an initial guess of the length by which a fragment must grow to | |
1678 | hold a branch to reach its destination. | |
1679 | Also updates fr_type/fr_subtype as necessary. | |
1680 | ||
1681 | Called just before doing relaxation. | |
1682 | Any symbol that is now undefined will not become defined. | |
1683 | The guess for fr_var is ACTUALLY the growth beyond fr_fix. | |
1684 | Whatever we do to grow fr_fix or fr_var contributes to our returned value. | |
ab3e48dc KH |
1685 | Although it may not be explicit in the frag, pretend fr_var starts |
1686 | with a 0 value. */ | |
252b5132 RH |
1687 | |
1688 | int | |
ea1562b3 | 1689 | md_estimate_size_before_relax (fragS *fragP, segT segment) |
252b5132 | 1690 | { |
252b5132 RH |
1691 | /* The only thing we have to handle here are symbols outside of the |
1692 | current segment. They may be undefined or in a different segment in | |
1693 | which case linker scripts may place them anywhere. | |
1694 | However, we can't finish the fragment here and emit the reloc as insn | |
1695 | alignment requirements may move the insn about. */ | |
6edf0760 NC |
1696 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment |
1697 | || S_IS_EXTERNAL (fragP->fr_symbol) | |
1698 | || S_IS_WEAK (fragP->fr_symbol)) | |
252b5132 RH |
1699 | { |
1700 | /* The symbol is undefined in this segment. | |
1701 | Change the relaxation subtype to the max allowable and leave | |
1702 | all further handling to md_convert_frag. */ | |
1703 | fragP->fr_subtype = 2; | |
1704 | ||
252b5132 | 1705 | { |
ab3e48dc KH |
1706 | const CGEN_INSN *insn; |
1707 | int i; | |
252b5132 RH |
1708 | |
1709 | /* Update the recorded insn. | |
1710 | Fortunately we don't have to look very far. | |
1711 | FIXME: Change this to record in the instruction the next higher | |
1712 | relaxable insn to use. */ | |
1713 | for (i = 0, insn = fragP->fr_cgen.insn; i < 4; i++, insn++) | |
1714 | { | |
1715 | if ((strcmp (CGEN_INSN_MNEMONIC (insn), | |
1716 | CGEN_INSN_MNEMONIC (fragP->fr_cgen.insn)) | |
1717 | == 0) | |
b11dcf4e | 1718 | && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED)) |
252b5132 RH |
1719 | break; |
1720 | } | |
1721 | if (i == 4) | |
1722 | abort (); | |
1723 | ||
1724 | fragP->fr_cgen.insn = insn; | |
1725 | return 2; | |
1726 | } | |
252b5132 RH |
1727 | } |
1728 | ||
606ab118 | 1729 | return md_relax_table[fragP->fr_subtype].rlx_length; |
ab3e48dc | 1730 | } |
252b5132 | 1731 | |
ab3e48dc | 1732 | /* *FRAGP has been relaxed to its final size, and now needs to have |
252b5132 RH |
1733 | the bytes inside it modified to conform to the new size. |
1734 | ||
1735 | Called after relaxation is finished. | |
1736 | fragP->fr_type == rs_machine_dependent. | |
1737 | fragP->fr_subtype is the subtype of what the address relaxed to. */ | |
1738 | ||
1739 | void | |
ea1562b3 NC |
1740 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
1741 | segT sec, | |
1742 | fragS *fragP) | |
252b5132 | 1743 | { |
ab3e48dc KH |
1744 | char *opcode; |
1745 | char *displacement; | |
1746 | int target_address; | |
1747 | int opcode_address; | |
1748 | int extension; | |
1749 | int addend; | |
252b5132 RH |
1750 | |
1751 | opcode = fragP->fr_opcode; | |
1752 | ||
1753 | /* Address opcode resides at in file space. */ | |
1754 | opcode_address = fragP->fr_address + fragP->fr_fix - 2; | |
1755 | ||
1756 | switch (fragP->fr_subtype) | |
1757 | { | |
ab3e48dc | 1758 | case 1: |
252b5132 | 1759 | extension = 0; |
ab3e48dc | 1760 | displacement = &opcode[1]; |
252b5132 | 1761 | break; |
ab3e48dc | 1762 | case 2: |
252b5132 RH |
1763 | opcode[0] |= 0x80; |
1764 | extension = 2; | |
ab3e48dc | 1765 | displacement = &opcode[1]; |
252b5132 | 1766 | break; |
ab3e48dc | 1767 | case 3: |
252b5132 RH |
1768 | opcode[2] = opcode[0] | 0x80; |
1769 | md_number_to_chars (opcode, PAR_NOP_INSN, 2); | |
1770 | opcode_address += 2; | |
1771 | extension = 4; | |
ab3e48dc | 1772 | displacement = &opcode[3]; |
252b5132 | 1773 | break; |
ab3e48dc | 1774 | default: |
252b5132 RH |
1775 | abort (); |
1776 | } | |
1777 | ||
6edf0760 NC |
1778 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec |
1779 | || S_IS_EXTERNAL (fragP->fr_symbol) | |
1780 | || S_IS_WEAK (fragP->fr_symbol)) | |
252b5132 | 1781 | { |
ab3e48dc | 1782 | /* Symbol must be resolved by linker. */ |
252b5132 RH |
1783 | if (fragP->fr_offset & 3) |
1784 | as_warn (_("Addend to unresolved symbol not on word boundary.")); | |
6edf0760 NC |
1785 | #ifdef USE_M32R_OLD_RELOC |
1786 | addend = fragP->fr_offset >> 2; /* Old M32R used USE_REL. */ | |
1787 | #else | |
1788 | addend = 0; | |
1789 | #endif | |
252b5132 RH |
1790 | } |
1791 | else | |
1792 | { | |
1793 | /* Address we want to reach in file space. */ | |
1794 | target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset; | |
252b5132 RH |
1795 | addend = (target_address - (opcode_address & -4)) >> 2; |
1796 | } | |
1797 | ||
1798 | /* Create a relocation for symbols that must be resolved by the linker. | |
1799 | Otherwise output the completed insn. */ | |
1800 | ||
6edf0760 NC |
1801 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec |
1802 | || S_IS_EXTERNAL (fragP->fr_symbol) | |
1803 | || S_IS_WEAK (fragP->fr_symbol)) | |
252b5132 | 1804 | { |
097f809a NC |
1805 | fixS *fixP; |
1806 | ||
9c2799c2 NC |
1807 | gas_assert (fragP->fr_subtype != 1); |
1808 | gas_assert (fragP->fr_cgen.insn != 0); | |
097f809a NC |
1809 | |
1810 | fixP = gas_cgen_record_fixup (fragP, | |
1811 | /* Offset of branch insn in frag. */ | |
1812 | fragP->fr_fix + extension - 4, | |
1813 | fragP->fr_cgen.insn, | |
1814 | 4 /* Length. */, | |
1815 | /* FIXME: quick hack. */ | |
097f809a NC |
1816 | cgen_operand_lookup_by_num (gas_cgen_cpu_desc, |
1817 | M32R_OPERAND_DISP24), | |
097f809a NC |
1818 | fragP->fr_cgen.opinfo, |
1819 | fragP->fr_symbol, fragP->fr_offset); | |
1820 | if (fragP->fr_cgen.opinfo) | |
1821 | fixP->fx_r_type = fragP->fr_cgen.opinfo; | |
252b5132 RH |
1822 | } |
1823 | ||
1824 | #define SIZE_FROM_RELAX_STATE(n) ((n) == 1 ? 1 : 3) | |
1825 | ||
1826 | md_number_to_chars (displacement, (valueT) addend, | |
1827 | SIZE_FROM_RELAX_STATE (fragP->fr_subtype)); | |
1828 | ||
1829 | fragP->fr_fix += extension; | |
1830 | } | |
1831 | \f | |
1832 | /* Functions concerning relocs. */ | |
1833 | ||
1834 | /* The location from which a PC relative jump should be calculated, | |
1835 | given a PC relative reloc. */ | |
1836 | ||
1837 | long | |
ea1562b3 | 1838 | md_pcrel_from_section (fixS *fixP, segT sec) |
252b5132 RH |
1839 | { |
1840 | if (fixP->fx_addsy != (symbolS *) NULL | |
1841 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
6edf0760 NC |
1842 | || S_GET_SEGMENT (fixP->fx_addsy) != sec |
1843 | || S_IS_EXTERNAL (fixP->fx_addsy) | |
1844 | || S_IS_WEAK (fixP->fx_addsy))) | |
252b5132 | 1845 | { |
a7498ae6 NC |
1846 | if (S_GET_SEGMENT (fixP->fx_addsy) != sec |
1847 | && S_IS_DEFINED (fixP->fx_addsy) | |
1848 | && ! S_IS_EXTERNAL (fixP->fx_addsy) | |
1849 | && ! S_IS_WEAK (fixP->fx_addsy)) | |
1850 | return fixP->fx_offset; | |
1851 | ||
252b5132 RH |
1852 | /* The symbol is undefined (or is defined but not in this section). |
1853 | Let the linker figure it out. */ | |
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | return (fixP->fx_frag->fr_address + fixP->fx_where) & -4L; | |
1858 | } | |
1859 | ||
1860 | /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP. | |
1861 | Returns BFD_RELOC_NONE if no reloc type can be found. | |
1862 | *FIXP may be modified if desired. */ | |
1863 | ||
1864 | bfd_reloc_code_real_type | |
ea1562b3 NC |
1865 | md_cgen_lookup_reloc (const CGEN_INSN *insn ATTRIBUTE_UNUSED, |
1866 | const CGEN_OPERAND *operand, | |
1867 | fixS *fixP) | |
252b5132 RH |
1868 | { |
1869 | switch (operand->type) | |
1870 | { | |
ab3e48dc KH |
1871 | case M32R_OPERAND_DISP8: return BFD_RELOC_M32R_10_PCREL; |
1872 | case M32R_OPERAND_DISP16: return BFD_RELOC_M32R_18_PCREL; | |
1873 | case M32R_OPERAND_DISP24: return BFD_RELOC_M32R_26_PCREL; | |
1874 | case M32R_OPERAND_UIMM24: return BFD_RELOC_M32R_24; | |
1875 | case M32R_OPERAND_HI16: | |
1876 | case M32R_OPERAND_SLO16: | |
1877 | case M32R_OPERAND_ULO16: | |
252b5132 RH |
1878 | /* If low/high/shigh/sda was used, it is recorded in `opinfo'. */ |
1879 | if (fixP->fx_cgen.opinfo != 0) | |
1880 | return fixP->fx_cgen.opinfo; | |
1881 | break; | |
ab3e48dc KH |
1882 | default: |
1883 | /* Avoid -Wall warning. */ | |
252b5132 RH |
1884 | break; |
1885 | } | |
1886 | return BFD_RELOC_NONE; | |
1887 | } | |
1888 | ||
1889 | /* Record a HI16 reloc for later matching with its LO16 cousin. */ | |
1890 | ||
1891 | static void | |
ea1562b3 NC |
1892 | m32r_record_hi16 (int reloc_type, |
1893 | fixS *fixP, | |
1894 | segT seg ATTRIBUTE_UNUSED) | |
252b5132 | 1895 | { |
ab3e48dc | 1896 | struct m32r_hi_fixup *hi_fixup; |
252b5132 | 1897 | |
9c2799c2 | 1898 | gas_assert (reloc_type == BFD_RELOC_M32R_HI16_SLO |
252b5132 RH |
1899 | || reloc_type == BFD_RELOC_M32R_HI16_ULO); |
1900 | ||
325801bd | 1901 | hi_fixup = XNEW (struct m32r_hi_fixup); |
252b5132 RH |
1902 | hi_fixup->fixp = fixP; |
1903 | hi_fixup->seg = now_seg; | |
1904 | hi_fixup->next = m32r_hi_fixup_list; | |
ab3e48dc | 1905 | |
252b5132 RH |
1906 | m32r_hi_fixup_list = hi_fixup; |
1907 | } | |
1908 | ||
1909 | /* Called while parsing an instruction to create a fixup. | |
1910 | We need to check for HI16 relocs and queue them up for later sorting. */ | |
1911 | ||
1912 | fixS * | |
ea1562b3 NC |
1913 | m32r_cgen_record_fixup_exp (fragS *frag, |
1914 | int where, | |
1915 | const CGEN_INSN *insn, | |
1916 | int length, | |
1917 | const CGEN_OPERAND *operand, | |
1918 | int opinfo, | |
1919 | expressionS *exp) | |
252b5132 | 1920 | { |
097f809a NC |
1921 | fixS *fixP; |
1922 | bfd_reloc_code_real_type r_type = BFD_RELOC_UNUSED; | |
1923 | ||
1924 | if (m32r_check_fixup (exp, &r_type)) | |
1925 | as_bad (_("Invalid PIC expression.")); | |
1926 | ||
1927 | fixP = gas_cgen_record_fixup_exp (frag, where, insn, length, | |
1928 | operand, opinfo, exp); | |
252b5132 RH |
1929 | |
1930 | switch (operand->type) | |
1931 | { | |
ab3e48dc | 1932 | case M32R_OPERAND_HI16: |
252b5132 RH |
1933 | /* If low/high/shigh/sda was used, it is recorded in `opinfo'. */ |
1934 | if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_SLO | |
1935 | || fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_ULO) | |
1936 | m32r_record_hi16 (fixP->fx_cgen.opinfo, fixP, now_seg); | |
1937 | break; | |
097f809a | 1938 | |
ab3e48dc | 1939 | default: |
097f809a | 1940 | /* Avoid -Wall warning. */ |
252b5132 RH |
1941 | break; |
1942 | } | |
1943 | ||
097f809a NC |
1944 | switch (r_type) |
1945 | { | |
1946 | case BFD_RELOC_UNUSED: | |
1947 | default: | |
1948 | return fixP; | |
1949 | ||
1950 | case BFD_RELOC_M32R_GOTPC24: | |
1951 | if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_SLO) | |
1952 | r_type = BFD_RELOC_M32R_GOTPC_HI_SLO; | |
1953 | else if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_ULO) | |
1954 | r_type = BFD_RELOC_M32R_GOTPC_HI_ULO; | |
1955 | else if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_LO16) | |
1956 | r_type = BFD_RELOC_M32R_GOTPC_LO; | |
1957 | break; | |
ea1562b3 | 1958 | |
097f809a NC |
1959 | case BFD_RELOC_M32R_GOT24: |
1960 | if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_SLO) | |
1961 | r_type = BFD_RELOC_M32R_GOT16_HI_SLO; | |
1962 | else if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_ULO) | |
1963 | r_type = BFD_RELOC_M32R_GOT16_HI_ULO; | |
1964 | else if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_LO16) | |
1965 | r_type = BFD_RELOC_M32R_GOT16_LO; | |
1966 | break; | |
ea1562b3 | 1967 | |
097f809a NC |
1968 | case BFD_RELOC_M32R_GOTOFF: |
1969 | if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_SLO) | |
1970 | r_type = BFD_RELOC_M32R_GOTOFF_HI_SLO; | |
1971 | else if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_HI16_ULO) | |
1972 | r_type = BFD_RELOC_M32R_GOTOFF_HI_ULO; | |
1973 | else if (fixP->fx_cgen.opinfo == BFD_RELOC_M32R_LO16) | |
1974 | r_type = BFD_RELOC_M32R_GOTOFF_LO; | |
1975 | break; | |
ea1562b3 | 1976 | |
097f809a NC |
1977 | case BFD_RELOC_M32R_26_PLTREL: |
1978 | as_bad (_("Invalid PIC expression.")); | |
1979 | break; | |
1980 | } | |
1981 | ||
1982 | fixP->fx_r_type = r_type; | |
1983 | ||
252b5132 RH |
1984 | return fixP; |
1985 | } | |
1986 | ||
1987 | /* Return BFD reloc type from opinfo field in a fixS. | |
1988 | It's tricky using fx_r_type in m32r_frob_file because the values | |
1989 | are BFD_RELOC_UNUSED + operand number. */ | |
1990 | #define FX_OPINFO_R_TYPE(f) ((f)->fx_cgen.opinfo) | |
1991 | ||
1992 | /* Sort any unmatched HI16 relocs so that they immediately precede | |
55cf6793 | 1993 | the corresponding LO16 reloc. This is called before md_apply_fix and |
252b5132 RH |
1994 | tc_gen_reloc. */ |
1995 | ||
1996 | void | |
ea1562b3 | 1997 | m32r_frob_file (void) |
252b5132 | 1998 | { |
ab3e48dc | 1999 | struct m32r_hi_fixup *l; |
252b5132 RH |
2000 | |
2001 | for (l = m32r_hi_fixup_list; l != NULL; l = l->next) | |
2002 | { | |
ab3e48dc KH |
2003 | segment_info_type *seginfo; |
2004 | int pass; | |
252b5132 | 2005 | |
9c2799c2 | 2006 | gas_assert (FX_OPINFO_R_TYPE (l->fixp) == BFD_RELOC_M32R_HI16_SLO |
252b5132 RH |
2007 | || FX_OPINFO_R_TYPE (l->fixp) == BFD_RELOC_M32R_HI16_ULO); |
2008 | ||
2009 | /* Check quickly whether the next fixup happens to be a matching low. */ | |
2010 | if (l->fixp->fx_next != NULL | |
2011 | && FX_OPINFO_R_TYPE (l->fixp->fx_next) == BFD_RELOC_M32R_LO16 | |
2012 | && l->fixp->fx_addsy == l->fixp->fx_next->fx_addsy | |
2013 | && l->fixp->fx_offset == l->fixp->fx_next->fx_offset) | |
2014 | continue; | |
2015 | ||
2016 | /* Look through the fixups for this segment for a matching `low'. | |
2017 | When we find one, move the high/shigh just in front of it. We do | |
2018 | this in two passes. In the first pass, we try to find a | |
2019 | unique `low'. In the second pass, we permit multiple high's | |
2020 | relocs for a single `low'. */ | |
2021 | seginfo = seg_info (l->seg); | |
2022 | for (pass = 0; pass < 2; pass++) | |
2023 | { | |
ab3e48dc KH |
2024 | fixS *f; |
2025 | fixS *prev; | |
252b5132 RH |
2026 | |
2027 | prev = NULL; | |
2028 | for (f = seginfo->fix_root; f != NULL; f = f->fx_next) | |
2029 | { | |
2030 | /* Check whether this is a `low' fixup which matches l->fixp. */ | |
2031 | if (FX_OPINFO_R_TYPE (f) == BFD_RELOC_M32R_LO16 | |
2032 | && f->fx_addsy == l->fixp->fx_addsy | |
2033 | && f->fx_offset == l->fixp->fx_offset | |
2034 | && (pass == 1 | |
2035 | || prev == NULL | |
2036 | || (FX_OPINFO_R_TYPE (prev) != BFD_RELOC_M32R_HI16_SLO | |
2037 | && FX_OPINFO_R_TYPE (prev) != BFD_RELOC_M32R_HI16_ULO) | |
2038 | || prev->fx_addsy != f->fx_addsy | |
ab3e48dc | 2039 | || prev->fx_offset != f->fx_offset)) |
252b5132 | 2040 | { |
ab3e48dc | 2041 | fixS **pf; |
252b5132 RH |
2042 | |
2043 | /* Move l->fixp before f. */ | |
2044 | for (pf = &seginfo->fix_root; | |
ab3e48dc KH |
2045 | *pf != l->fixp; |
2046 | pf = & (*pf)->fx_next) | |
9c2799c2 | 2047 | gas_assert (*pf != NULL); |
252b5132 | 2048 | |
ab3e48dc | 2049 | *pf = l->fixp->fx_next; |
252b5132 RH |
2050 | |
2051 | l->fixp->fx_next = f; | |
2052 | if (prev == NULL) | |
2053 | seginfo->fix_root = l->fixp; | |
2054 | else | |
2055 | prev->fx_next = l->fixp; | |
2056 | ||
2057 | break; | |
2058 | } | |
2059 | ||
2060 | prev = f; | |
2061 | } | |
2062 | ||
2063 | if (f != NULL) | |
2064 | break; | |
2065 | ||
2066 | if (pass == 1 | |
2067 | && warn_unmatched_high) | |
2068 | as_warn_where (l->fixp->fx_file, l->fixp->fx_line, | |
2069 | _("Unmatched high/shigh reloc")); | |
2070 | } | |
2071 | } | |
2072 | } | |
2073 | ||
2074 | /* See whether we need to force a relocation into the output file. | |
2075 | This is used to force out switch and PC relative relocations when | |
2076 | relaxing. */ | |
2077 | ||
2078 | int | |
ea1562b3 | 2079 | m32r_force_relocation (fixS *fix) |
252b5132 | 2080 | { |
ae6063d4 | 2081 | if (generic_force_reloc (fix)) |
252b5132 RH |
2082 | return 1; |
2083 | ||
2084 | if (! m32r_relax) | |
2085 | return 0; | |
2086 | ||
ab3e48dc | 2087 | return fix->fx_pcrel; |
252b5132 RH |
2088 | } |
2089 | \f | |
2090 | /* Write a value out to the object file, using the appropriate endianness. */ | |
2091 | ||
2092 | void | |
ea1562b3 | 2093 | md_number_to_chars (char *buf, valueT val, int n) |
252b5132 RH |
2094 | { |
2095 | if (target_big_endian) | |
2096 | number_to_chars_bigendian (buf, val, n); | |
2097 | else | |
2098 | number_to_chars_littleendian (buf, val, n); | |
2099 | } | |
2100 | ||
ab3e48dc KH |
2101 | /* Turn a string in input_line_pointer into a floating point constant |
2102 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
2103 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
2104 | returned, or NULL on OK. */ | |
252b5132 | 2105 | |
ab3e48dc | 2106 | /* Equal to MAX_PRECISION in atof-ieee.c. */ |
252b5132 RH |
2107 | #define MAX_LITTLENUMS 6 |
2108 | ||
6d4af3c2 | 2109 | const char * |
ea1562b3 | 2110 | md_atof (int type, char *litP, int *sizeP) |
252b5132 | 2111 | { |
499ac353 | 2112 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
252b5132 RH |
2113 | } |
2114 | ||
2115 | void | |
ea1562b3 | 2116 | m32r_elf_section_change_hook (void) |
252b5132 RH |
2117 | { |
2118 | /* If we have reached the end of a section and we have just emitted a | |
2119 | 16 bit insn, then emit a nop to make sure that the section ends on | |
2120 | a 32 bit boundary. */ | |
ab3e48dc | 2121 | |
252b5132 RH |
2122 | if (prev_insn.insn || seen_relaxable_p) |
2123 | (void) m32r_fill_insn (0); | |
2124 | } | |
2125 | ||
60bcf0fa | 2126 | /* Return true if can adjust the reloc to be relative to its section |
ab3e48dc | 2127 | (such as .data) instead of relative to some symbol. */ |
60bcf0fa | 2128 | |
b34976b6 | 2129 | bfd_boolean |
ea1562b3 | 2130 | m32r_fix_adjustable (fixS *fixP) |
252b5132 | 2131 | { |
5c86cbc7 | 2132 | bfd_reloc_code_real_type reloc_type; |
ab3e48dc | 2133 | |
5c86cbc7 CM |
2134 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) |
2135 | { | |
2136 | const CGEN_INSN *insn = NULL; | |
2137 | int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
ab3e48dc KH |
2138 | const CGEN_OPERAND *operand = |
2139 | cgen_operand_lookup_by_num(gas_cgen_cpu_desc, opindex); | |
ea1562b3 | 2140 | |
5c86cbc7 CM |
2141 | reloc_type = md_cgen_lookup_reloc (insn, operand, fixP); |
2142 | } | |
2143 | else | |
2144 | reloc_type = fixP->fx_r_type; | |
2145 | ||
6edf0760 NC |
2146 | if (fixP->fx_addsy == NULL) |
2147 | return 1; | |
2148 | ||
2149 | /* Prevent all adjustments to global symbols. */ | |
e97b3f28 | 2150 | if (S_IS_EXTERNAL (fixP->fx_addsy)) |
6edf0760 NC |
2151 | return 0; |
2152 | if (S_IS_WEAK (fixP->fx_addsy)) | |
2153 | return 0; | |
2154 | ||
2155 | if (pic_code | |
2156 | && (reloc_type == BFD_RELOC_M32R_24 | |
2157 | || reloc_type == BFD_RELOC_M32R_26_PCREL | |
2158 | || reloc_type == BFD_RELOC_M32R_HI16_SLO | |
2159 | || reloc_type == BFD_RELOC_M32R_HI16_ULO | |
2160 | || reloc_type == BFD_RELOC_M32R_LO16)) | |
2161 | return 0; | |
2162 | ||
097f809a NC |
2163 | if (reloc_type == BFD_RELOC_M32R_GOT24 |
2164 | || reloc_type == BFD_RELOC_M32R_26_PLTREL | |
2165 | || reloc_type == BFD_RELOC_M32R_GOTPC_HI_SLO | |
2166 | || reloc_type == BFD_RELOC_M32R_GOTPC_HI_ULO | |
2167 | || reloc_type == BFD_RELOC_M32R_GOTPC_LO | |
2168 | || reloc_type == BFD_RELOC_M32R_GOT16_HI_SLO | |
2169 | || reloc_type == BFD_RELOC_M32R_GOT16_HI_ULO | |
2170 | || reloc_type == BFD_RELOC_M32R_GOT16_LO) | |
2171 | return 0; | |
2172 | ||
ab3e48dc | 2173 | /* We need the symbol name for the VTABLE entries. */ |
5c86cbc7 CM |
2174 | if (reloc_type == BFD_RELOC_VTABLE_INHERIT |
2175 | || reloc_type == BFD_RELOC_VTABLE_ENTRY) | |
252b5132 RH |
2176 | return 0; |
2177 | ||
2178 | return 1; | |
2179 | } | |
88845958 NC |
2180 | |
2181 | void | |
097f809a | 2182 | m32r_elf_final_processing (void) |
88845958 NC |
2183 | { |
2184 | if (use_parallel) | |
2185 | m32r_flags |= E_M32R_HAS_PARALLEL; | |
2186 | elf_elfheader (stdoutput)->e_flags |= m32r_flags; | |
2187 | } | |
6edf0760 | 2188 | |
6edf0760 NC |
2189 | /* Translate internal representation of relocation info to BFD target |
2190 | format. */ | |
097f809a | 2191 | |
6edf0760 | 2192 | arelent * |
ea1562b3 | 2193 | tc_gen_reloc (asection * section, fixS * fixP) |
6edf0760 NC |
2194 | { |
2195 | arelent * reloc; | |
2196 | bfd_reloc_code_real_type code; | |
3739860c | 2197 | |
325801bd | 2198 | reloc = XNEW (arelent); |
3739860c | 2199 | |
325801bd | 2200 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
6edf0760 NC |
2201 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
2202 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
157e7bd1 NC |
2203 | |
2204 | if (fixP->fx_pcrel) | |
2205 | { | |
2206 | if (fixP->fx_r_type == BFD_RELOC_32) | |
2207 | fixP->fx_r_type = BFD_RELOC_32_PCREL; | |
2208 | else if (fixP->fx_r_type == BFD_RELOC_16) | |
2209 | { | |
2210 | fixP->fx_r_type = BFD_RELOC_16_PCREL; | |
2211 | bfd_set_error (bfd_error_bad_value); | |
2212 | } | |
2213 | } | |
3739860c | 2214 | |
6edf0760 NC |
2215 | code = fixP->fx_r_type; |
2216 | if (pic_code) | |
2217 | { | |
2218 | #ifdef DEBUG_PIC | |
2219 | printf("%s",bfd_get_reloc_code_name(code)); | |
2220 | #endif | |
2221 | switch (code) | |
2222 | { | |
2223 | case BFD_RELOC_M32R_26_PCREL: | |
2224 | code = BFD_RELOC_M32R_26_PLTREL; | |
2225 | break; | |
ea1562b3 | 2226 | |
6edf0760 NC |
2227 | case BFD_RELOC_M32R_24: |
2228 | if (fixP->fx_addsy != NULL | |
2229 | && strcmp (S_GET_NAME (fixP->fx_addsy), GOT_NAME) == 0) | |
2230 | code = BFD_RELOC_M32R_GOTPC24; | |
2231 | else | |
2232 | code = BFD_RELOC_M32R_GOT24; | |
2233 | break; | |
ea1562b3 | 2234 | |
6edf0760 NC |
2235 | case BFD_RELOC_M32R_HI16_ULO: |
2236 | if (fixP->fx_addsy != NULL | |
2237 | && strcmp (S_GET_NAME (fixP->fx_addsy), GOT_NAME) == 0) | |
2238 | code = BFD_RELOC_M32R_GOTPC_HI_ULO; | |
2239 | else | |
2240 | code = BFD_RELOC_M32R_GOT16_HI_ULO; | |
2241 | break; | |
ea1562b3 | 2242 | |
6edf0760 NC |
2243 | case BFD_RELOC_M32R_HI16_SLO: |
2244 | if (fixP->fx_addsy != NULL | |
2245 | && strcmp (S_GET_NAME (fixP->fx_addsy), GOT_NAME) == 0) | |
2246 | code = BFD_RELOC_M32R_GOTPC_HI_SLO; | |
2247 | else | |
2248 | code = BFD_RELOC_M32R_GOT16_HI_SLO; | |
2249 | break; | |
ea1562b3 | 2250 | |
6edf0760 NC |
2251 | case BFD_RELOC_M32R_LO16: |
2252 | if (fixP->fx_addsy != NULL | |
2253 | && strcmp (S_GET_NAME (fixP->fx_addsy), GOT_NAME) == 0) | |
2254 | code = BFD_RELOC_M32R_GOTPC_LO; | |
2255 | else | |
2256 | code = BFD_RELOC_M32R_GOT16_LO; | |
2257 | break; | |
ea1562b3 | 2258 | |
6edf0760 NC |
2259 | default: |
2260 | break; | |
2261 | } | |
2262 | #ifdef DEBUG_PIC | |
2263 | printf(" => %s",bfd_get_reloc_code_name(code)); | |
2264 | #endif | |
2265 | } | |
3739860c | 2266 | |
6edf0760 | 2267 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
ea1562b3 | 2268 | |
6edf0760 NC |
2269 | #ifdef DEBUG_PIC |
2270 | printf(" => %s\n",reloc->howto->name); | |
2271 | #endif | |
ea1562b3 NC |
2272 | |
2273 | if (reloc->howto == (reloc_howto_type *) NULL) | |
6edf0760 NC |
2274 | { |
2275 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2276 | _("internal error: can't export reloc type %d (`%s')"), | |
2277 | fixP->fx_r_type, bfd_get_reloc_code_name (code)); | |
2278 | return NULL; | |
2279 | } | |
3739860c | 2280 | |
097f809a | 2281 | /* Use fx_offset for these cases. */ |
6edf0760 | 2282 | if ( fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY |
157e7bd1 NC |
2283 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
2284 | || fixP->fx_r_type == BFD_RELOC_32_PCREL) | |
6edf0760 | 2285 | reloc->addend = fixP->fx_offset; |
097f809a NC |
2286 | else if ((!pic_code |
2287 | && code != BFD_RELOC_M32R_26_PLTREL) | |
6edf0760 NC |
2288 | && fixP->fx_pcrel |
2289 | && fixP->fx_addsy != NULL | |
2290 | && (S_GET_SEGMENT(fixP->fx_addsy) != section) | |
2291 | && S_IS_DEFINED (fixP->fx_addsy) | |
2292 | && ! S_IS_EXTERNAL(fixP->fx_addsy) | |
2293 | && ! S_IS_WEAK(fixP->fx_addsy)) | |
33eaf5de | 2294 | /* Already used fx_offset in the opcode field itself. */ |
a7498ae6 | 2295 | reloc->addend = fixP->fx_offset; |
6edf0760 NC |
2296 | else |
2297 | reloc->addend = fixP->fx_addnumber; | |
3739860c | 2298 | |
6edf0760 NC |
2299 | return reloc; |
2300 | } | |
097f809a NC |
2301 | |
2302 | inline static char * | |
e0471c16 | 2303 | m32r_end_of_match (char *cont, const char *what) |
097f809a NC |
2304 | { |
2305 | int len = strlen (what); | |
2306 | ||
2307 | if (strncasecmp (cont, what, strlen (what)) == 0 | |
2308 | && ! is_part_of_name (cont[len])) | |
2309 | return cont + len; | |
2310 | ||
2311 | return NULL; | |
2312 | } | |
2313 | ||
2314 | int | |
9497f5ac NC |
2315 | m32r_parse_name (char const *name, |
2316 | expressionS *exprP, | |
2317 | enum expr_mode mode, | |
2318 | char *nextcharP) | |
097f809a NC |
2319 | { |
2320 | char *next = input_line_pointer; | |
2321 | char *next_end; | |
2322 | int reloc_type; | |
2323 | operatorT op_type; | |
2324 | segT segment; | |
2325 | ||
2326 | exprP->X_op_symbol = NULL; | |
2327 | exprP->X_md = BFD_RELOC_UNUSED; | |
2328 | ||
2329 | if (strcmp (name, GOT_NAME) == 0) | |
2330 | { | |
2331 | if (! GOT_symbol) | |
2332 | GOT_symbol = symbol_find_or_make (name); | |
2333 | ||
2334 | exprP->X_add_symbol = GOT_symbol; | |
2335 | no_suffix: | |
2336 | /* If we have an absolute symbol or a | |
2337 | reg, then we know its value now. */ | |
2338 | segment = S_GET_SEGMENT (exprP->X_add_symbol); | |
9497f5ac | 2339 | if (mode != expr_defer && segment == absolute_section) |
097f809a NC |
2340 | { |
2341 | exprP->X_op = O_constant; | |
2342 | exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol); | |
2343 | exprP->X_add_symbol = NULL; | |
2344 | } | |
9497f5ac | 2345 | else if (mode != expr_defer && segment == reg_section) |
097f809a NC |
2346 | { |
2347 | exprP->X_op = O_register; | |
2348 | exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol); | |
2349 | exprP->X_add_symbol = NULL; | |
2350 | } | |
2351 | else | |
2352 | { | |
2353 | exprP->X_op = O_symbol; | |
2354 | exprP->X_add_number = 0; | |
2355 | } | |
2356 | ||
2357 | return 1; | |
2358 | } | |
2359 | ||
2360 | exprP->X_add_symbol = symbol_find_or_make (name); | |
2361 | ||
2362 | if (*nextcharP != '@') | |
2363 | goto no_suffix; | |
2364 | else if ((next_end = m32r_end_of_match (next + 1, "GOTOFF"))) | |
2365 | { | |
2366 | reloc_type = BFD_RELOC_M32R_GOTOFF; | |
2367 | op_type = O_PIC_reloc; | |
2368 | } | |
2369 | else if ((next_end = m32r_end_of_match (next + 1, "GOT"))) | |
2370 | { | |
2371 | reloc_type = BFD_RELOC_M32R_GOT24; | |
2372 | op_type = O_PIC_reloc; | |
2373 | } | |
2374 | else if ((next_end = m32r_end_of_match (next + 1, "PLT"))) | |
2375 | { | |
2376 | reloc_type = BFD_RELOC_M32R_26_PLTREL; | |
2377 | op_type = O_PIC_reloc; | |
2378 | } | |
2379 | else | |
2380 | goto no_suffix; | |
2381 | ||
2382 | *input_line_pointer = *nextcharP; | |
2383 | input_line_pointer = next_end; | |
2384 | *nextcharP = *input_line_pointer; | |
2385 | *input_line_pointer = '\0'; | |
2386 | ||
2387 | exprP->X_op = op_type; | |
2388 | exprP->X_add_number = 0; | |
2389 | exprP->X_md = reloc_type; | |
2390 | ||
2391 | return 1; | |
2392 | } | |
2393 | ||
2394 | int | |
2395 | m32r_cgen_parse_fix_exp(int opinfo, expressionS *exp) | |
2396 | { | |
2397 | if (exp->X_op == O_PIC_reloc | |
2398 | && exp->X_md == BFD_RELOC_M32R_26_PLTREL) | |
2399 | { | |
2400 | exp->X_op = O_symbol; | |
2401 | opinfo = exp->X_md; | |
2402 | } | |
2403 | ||
2404 | return opinfo; | |
2405 | } |