Commit | Line | Data |
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252b5132 | 1 | /* tc-arc.c -- Assembler for the ARC |
f7e42eb4 NC |
2 | Copyright 1994, 1995, 1997, 1999, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | Contributed by Doug Evans (dje@cygnus.com). |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19203624 KH |
19 | along with GAS; see the file COPYING. If not, write to the Free |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
252b5132 RH |
22 | |
23 | #include <stdio.h> | |
24 | #include <ctype.h> | |
0d2bcfaf | 25 | #include "libiberty.h" |
252b5132 RH |
26 | #include "as.h" |
27 | #include "subsegs.h" | |
28 | #include "opcode/arc.h" | |
0d2bcfaf | 29 | #include "../opcodes/arc-ext.h" |
252b5132 RH |
30 | #include "elf/arc.h" |
31 | ||
32 | extern int arc_get_mach PARAMS ((char *)); | |
0d2bcfaf NC |
33 | extern int arc_operand_type PARAMS ((int)); |
34 | extern int arc_insn_not_jl PARAMS ((arc_insn)); | |
35 | extern int arc_limm_fixup_adjust PARAMS ((arc_insn)); | |
36 | extern int arc_get_noshortcut_flag PARAMS ((void)); | |
37 | extern int arc_set_ext_seg PARAMS ((void)); | |
19203624 | 38 | extern void arc_code_symbol PARAMS ((expressionS *)); |
252b5132 RH |
39 | |
40 | static arc_insn arc_insert_operand PARAMS ((arc_insn, | |
41 | const struct arc_operand *, int, | |
42 | const struct arc_operand_value *, | |
43 | offsetT, char *, unsigned int)); | |
44 | static void arc_common PARAMS ((int)); | |
0d2bcfaf NC |
45 | static void arc_extinst PARAMS ((int)); |
46 | static void arc_extoper PARAMS ((int)); | |
47 | static void arc_option PARAMS ((int)); | |
252b5132 RH |
48 | static int get_arc_exp_reloc_type PARAMS ((int, int, expressionS *, |
49 | expressionS *)); | |
50 | ||
0d2bcfaf NC |
51 | const struct suffix_classes { |
52 | char *name; | |
53 | int len; | |
54 | } suffixclass[] = { | |
55 | { "SUFFIX_COND|SUFFIX_FLAG",23 }, | |
56 | { "SUFFIX_FLAG", 11 }, | |
57 | { "SUFFIX_COND", 11 }, | |
58 | { "SUFFIX_NONE", 11 } | |
59 | }; | |
60 | ||
bfb32b52 | 61 | #define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes)) |
0d2bcfaf NC |
62 | |
63 | const struct syntax_classes { | |
64 | char *name; | |
65 | int len; | |
66 | int class; | |
67 | } syntaxclass[] = { | |
68 | { "SYNTAX_3OP|OP1_MUST_BE_IMM", 26, SYNTAX_3OP|OP1_MUST_BE_IMM|SYNTAX_VALID }, | |
69 | { "OP1_MUST_BE_IMM|SYNTAX_3OP", 26, OP1_MUST_BE_IMM|SYNTAX_3OP|SYNTAX_VALID }, | |
70 | { "SYNTAX_2OP|OP1_IMM_IMPLIED", 26, SYNTAX_2OP|OP1_IMM_IMPLIED|SYNTAX_VALID }, | |
71 | { "OP1_IMM_IMPLIED|SYNTAX_2OP", 26, OP1_IMM_IMPLIED|SYNTAX_2OP|SYNTAX_VALID }, | |
72 | { "SYNTAX_3OP", 10, SYNTAX_3OP|SYNTAX_VALID }, | |
73 | { "SYNTAX_2OP", 10, SYNTAX_2OP|SYNTAX_VALID } | |
74 | }; | |
75 | ||
bfb32b52 | 76 | #define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes)) |
0d2bcfaf | 77 | |
19203624 | 78 | const pseudo_typeS md_pseudo_table[] = { |
0d2bcfaf NC |
79 | { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0) */ |
80 | { "comm", arc_common, 0 }, | |
252b5132 | 81 | { "common", arc_common, 0 }, |
0d2bcfaf NC |
82 | { "lcomm", arc_common, 1 }, |
83 | { "lcommon", arc_common, 1 }, | |
84 | { "2byte", cons, 2 }, | |
85 | { "half", cons, 2 }, | |
86 | { "short", cons, 2 }, | |
87 | { "3byte", cons, 3 }, | |
88 | { "4byte", cons, 4 }, | |
252b5132 | 89 | { "word", cons, 4 }, |
0d2bcfaf NC |
90 | { "option", arc_option, 0 }, |
91 | { "block", s_space, 0 }, | |
92 | { "extcondcode", arc_extoper, 0 }, | |
93 | { "extcoreregister", arc_extoper, 1 }, | |
94 | { "extauxregister", arc_extoper, 2 }, | |
95 | { "extinstruction", arc_extinst, 0 }, | |
252b5132 RH |
96 | { NULL, 0, 0 }, |
97 | }; | |
98 | ||
99 | /* This array holds the chars that always start a comment. If the | |
100 | pre-processor is disabled, these aren't very useful */ | |
101 | const char comment_chars[] = "#;"; | |
102 | ||
103 | /* This array holds the chars that only start a comment at the beginning of | |
104 | a line. If the line seems to have the form '# 123 filename' | |
105 | .line and .file directives will appear in the pre-processed output */ | |
106 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
107 | first line of the input file. This is because the compiler outputs | |
bfb32b52 | 108 | #NO_APP at the beginning of its output. */ |
252b5132 | 109 | /* Also note that comments started like this one will always |
bfb32b52 | 110 | work if '/' isn't otherwise defined. */ |
252b5132 RH |
111 | const char line_comment_chars[] = "#"; |
112 | ||
113 | const char line_separator_chars[] = ""; | |
114 | ||
115 | /* Chars that can be used to separate mant from exp in floating point nums */ | |
116 | const char EXP_CHARS[] = "eE"; | |
117 | ||
118 | /* Chars that mean this number is a floating point constant */ | |
119 | /* As in 0f12.456 */ | |
120 | /* or 0d1.2345e12 */ | |
121 | const char FLT_CHARS[] = "rRsSfFdD"; | |
122 | ||
123 | /* Byte order. */ | |
124 | extern int target_big_endian; | |
125 | const char *arc_target_format = DEFAULT_TARGET_FORMAT; | |
126 | static int byte_order = DEFAULT_BYTE_ORDER; | |
127 | ||
0d2bcfaf NC |
128 | static segT arcext_section; |
129 | ||
130 | /* One of bfd_mach_arc_n. */ | |
131 | static int arc_mach_type = bfd_mach_arc_5; | |
252b5132 RH |
132 | |
133 | /* Non-zero if the cpu type has been explicitly specified. */ | |
134 | static int mach_type_specified_p = 0; | |
135 | ||
136 | /* Non-zero if opcode tables have been initialized. | |
137 | A .cpu command must appear before any instructions. */ | |
138 | static int cpu_tables_init_p = 0; | |
139 | ||
140 | static struct hash_control *arc_suffix_hash = NULL; | |
141 | \f | |
142 | const char *md_shortopts = ""; | |
19203624 | 143 | struct option md_longopts[] = { |
252b5132 RH |
144 | #define OPTION_EB (OPTION_MD_BASE + 0) |
145 | {"EB", no_argument, NULL, OPTION_EB}, | |
146 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
147 | {"EL", no_argument, NULL, OPTION_EL}, | |
0d2bcfaf NC |
148 | #define OPTION_ARC5 (OPTION_MD_BASE + 2) |
149 | {"marc5", no_argument, NULL, OPTION_ARC5}, | |
150 | #define OPTION_ARC6 (OPTION_MD_BASE + 3) | |
151 | {"marc6", no_argument, NULL, OPTION_ARC6}, | |
152 | #define OPTION_ARC7 (OPTION_MD_BASE + 4) | |
153 | {"marc7", no_argument, NULL, OPTION_ARC7}, | |
154 | #define OPTION_ARC8 (OPTION_MD_BASE + 5) | |
155 | {"marc8", no_argument, NULL, OPTION_ARC8}, | |
156 | #define OPTION_ARC (OPTION_MD_BASE + 6) | |
157 | {"marc", no_argument, NULL, OPTION_ARC}, | |
252b5132 RH |
158 | { NULL, no_argument, NULL, 0 } |
159 | }; | |
160 | size_t md_longopts_size = sizeof (md_longopts); | |
161 | ||
0d2bcfaf NC |
162 | #define IS_SYMBOL_OPERAND(o) \ |
163 | ((o) == 'b' || (o) == 'c' || (o) == 's' || (o) == 'o' || (o) == 'O') | |
164 | ||
19203624 | 165 | struct arc_operand_value *get_ext_suffix (char *s); |
0d2bcfaf | 166 | |
19203624 KH |
167 | /* Invocation line includes a switch not recognized by the base assembler. |
168 | See if it's a processor-specific option. */ | |
252b5132 RH |
169 | |
170 | int | |
171 | md_parse_option (c, arg) | |
172 | int c; | |
4a314ec8 | 173 | char *arg ATTRIBUTE_UNUSED; |
252b5132 RH |
174 | { |
175 | switch (c) | |
1e07b820 | 176 | { |
0d2bcfaf NC |
177 | case OPTION_ARC: |
178 | case OPTION_ARC5: | |
179 | arc_mach_type = bfd_mach_arc_5; | |
180 | break; | |
181 | case OPTION_ARC6: | |
182 | arc_mach_type = bfd_mach_arc_6; | |
183 | break; | |
184 | case OPTION_ARC7: | |
185 | arc_mach_type = bfd_mach_arc_7; | |
186 | break; | |
187 | case OPTION_ARC8: | |
188 | arc_mach_type = bfd_mach_arc_8; | |
189 | break; | |
252b5132 RH |
190 | case OPTION_EB: |
191 | byte_order = BIG_ENDIAN; | |
192 | arc_target_format = "elf32-bigarc"; | |
193 | break; | |
194 | case OPTION_EL: | |
195 | byte_order = LITTLE_ENDIAN; | |
196 | arc_target_format = "elf32-littlearc"; | |
197 | break; | |
198 | default: | |
199 | return 0; | |
1e07b820 | 200 | } |
252b5132 RH |
201 | return 1; |
202 | } | |
203 | ||
204 | void | |
205 | md_show_usage (stream) | |
206 | FILE *stream; | |
207 | { | |
0d2bcfaf NC |
208 | fprintf (stream, "\ |
209 | ARC Options:\n\ | |
210 | -marc[5|6|7|8] select processor variant (default arc%d)\n\ | |
211 | -EB assemble code for a big endian cpu\n\ | |
212 | -EL assemble code for a little endian cpu\n", arc_mach_type + 5); | |
252b5132 RH |
213 | } |
214 | ||
215 | /* This function is called once, at assembler startup time. It should | |
216 | set up all the tables, etc. that the MD part of the assembler will need. | |
217 | Opcode selection is defered until later because we might see a .cpu | |
218 | command. */ | |
219 | ||
220 | void | |
221 | md_begin () | |
222 | { | |
223 | /* The endianness can be chosen "at the factory". */ | |
224 | target_big_endian = byte_order == BIG_ENDIAN; | |
225 | ||
226 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type)) | |
0d2bcfaf | 227 | as_warn ("could not set architecture and machine"); |
252b5132 | 228 | |
0d2bcfaf | 229 | /* This call is necessary because we need to |
252b5132 RH |
230 | initialize `arc_operand_map' which may be needed before we see the |
231 | first insn. */ | |
0d2bcfaf | 232 | arc_opcode_init_tables (arc_get_opcode_mach (arc_mach_type, |
252b5132 RH |
233 | target_big_endian)); |
234 | } | |
235 | ||
236 | /* Initialize the various opcode and operand tables. | |
237 | MACH is one of bfd_mach_arc_xxx. */ | |
238 | ||
239 | static void | |
240 | init_opcode_tables (mach) | |
241 | int mach; | |
242 | { | |
4a314ec8 | 243 | int i; |
252b5132 RH |
244 | char *last; |
245 | ||
246 | if ((arc_suffix_hash = hash_new ()) == NULL) | |
0d2bcfaf | 247 | as_fatal ("virtual memory exhausted"); |
252b5132 RH |
248 | |
249 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) | |
0d2bcfaf | 250 | as_warn ("could not set architecture and machine"); |
252b5132 RH |
251 | |
252 | /* This initializes a few things in arc-opc.c that we need. | |
253 | This must be called before the various arc_xxx_supported fns. */ | |
254 | arc_opcode_init_tables (arc_get_opcode_mach (mach, target_big_endian)); | |
255 | ||
256 | /* Only put the first entry of each equivalently named suffix in the | |
257 | table. */ | |
258 | last = ""; | |
259 | for (i = 0; i < arc_suffixes_count; i++) | |
260 | { | |
252b5132 RH |
261 | if (strcmp (arc_suffixes[i].name, last) != 0) |
262 | hash_insert (arc_suffix_hash, arc_suffixes[i].name, (PTR) (arc_suffixes + i)); | |
263 | last = arc_suffixes[i].name; | |
264 | } | |
265 | ||
266 | /* Since registers don't have a prefix, we put them in the symbol table so | |
267 | they can't be used as symbols. This also simplifies argument parsing as | |
268 | we can let gas parse registers for us. The recorded register number is | |
0d2bcfaf NC |
269 | the address of the register's entry in arc_reg_names. |
270 | ||
271 | If the register name is already in the table, then the existing | |
272 | definition is assumed to be from an .ExtCoreRegister pseudo-op. */ | |
273 | ||
252b5132 RH |
274 | for (i = 0; i < arc_reg_names_count; i++) |
275 | { | |
19203624 | 276 | if (symbol_find (arc_reg_names[i].name)) |
252b5132 RH |
277 | continue; |
278 | /* Use symbol_create here instead of symbol_new so we don't try to | |
279 | output registers into the object file's symbol table. */ | |
280 | symbol_table_insert (symbol_create (arc_reg_names[i].name, reg_section, | |
0d2bcfaf | 281 | (int) &arc_reg_names[i], &zero_address_frag)); |
252b5132 RH |
282 | } |
283 | ||
0d2bcfaf | 284 | /* Tell `.option' it's too late. */ |
252b5132 RH |
285 | cpu_tables_init_p = 1; |
286 | } | |
287 | \f | |
288 | /* Insert an operand value into an instruction. | |
289 | If REG is non-NULL, it is a register number and ignore VAL. */ | |
290 | ||
291 | static arc_insn | |
292 | arc_insert_operand (insn, operand, mods, reg, val, file, line) | |
293 | arc_insn insn; | |
294 | const struct arc_operand *operand; | |
295 | int mods; | |
296 | const struct arc_operand_value *reg; | |
297 | offsetT val; | |
298 | char *file; | |
299 | unsigned int line; | |
300 | { | |
301 | if (operand->bits != 32) | |
302 | { | |
303 | long min, max; | |
304 | offsetT test; | |
305 | ||
306 | if ((operand->flags & ARC_OPERAND_SIGNED) != 0) | |
307 | { | |
308 | if ((operand->flags & ARC_OPERAND_SIGNOPT) != 0) | |
309 | max = (1 << operand->bits) - 1; | |
310 | else | |
311 | max = (1 << (operand->bits - 1)) - 1; | |
312 | min = - (1 << (operand->bits - 1)); | |
313 | } | |
314 | else | |
315 | { | |
316 | max = (1 << operand->bits) - 1; | |
317 | min = 0; | |
318 | } | |
319 | ||
320 | if ((operand->flags & ARC_OPERAND_NEGATIVE) != 0) | |
321 | test = - val; | |
322 | else | |
323 | test = val; | |
324 | ||
325 | if (test < (offsetT) min || test > (offsetT) max) | |
326 | { | |
327 | const char *err = | |
0d2bcfaf | 328 | "operand out of range (%s not between %ld and %ld)"; |
252b5132 RH |
329 | char buf[100]; |
330 | ||
331 | sprint_value (buf, test); | |
332 | if (file == (char *) NULL) | |
333 | as_warn (err, buf, min, max); | |
334 | else | |
335 | as_warn_where (file, line, err, buf, min, max); | |
336 | } | |
337 | } | |
338 | ||
339 | if (operand->insert) | |
340 | { | |
341 | const char *errmsg; | |
342 | ||
343 | errmsg = NULL; | |
344 | insn = (*operand->insert) (insn, operand, mods, reg, (long) val, &errmsg); | |
345 | if (errmsg != (const char *) NULL) | |
346 | as_warn (errmsg); | |
347 | } | |
348 | else | |
349 | insn |= (((long) val & ((1 << operand->bits) - 1)) | |
350 | << operand->shift); | |
351 | ||
352 | return insn; | |
353 | } | |
354 | ||
355 | /* We need to keep a list of fixups. We can't simply generate them as | |
356 | we go, because that would require us to first create the frag, and | |
357 | that would screw up references to ``.''. */ | |
358 | ||
19203624 | 359 | struct arc_fixup { |
252b5132 RH |
360 | /* index into `arc_operands' */ |
361 | int opindex; | |
362 | expressionS exp; | |
363 | }; | |
364 | ||
365 | #define MAX_FIXUPS 5 | |
366 | ||
367 | #define MAX_SUFFIXES 5 | |
368 | ||
369 | /* This routine is called for each instruction to be assembled. */ | |
370 | ||
371 | void | |
372 | md_assemble (str) | |
373 | char *str; | |
374 | { | |
375 | const struct arc_opcode *opcode; | |
0d2bcfaf NC |
376 | const struct arc_opcode *std_opcode; |
377 | struct arc_opcode *ext_opcode; | |
252b5132 | 378 | char *start; |
0d2bcfaf | 379 | const char *last_errmsg = 0; |
252b5132 RH |
380 | arc_insn insn; |
381 | static int init_tables_p = 0; | |
382 | ||
383 | /* Opcode table initialization is deferred until here because we have to | |
384 | wait for a possible .cpu command. */ | |
385 | if (!init_tables_p) | |
386 | { | |
387 | init_opcode_tables (arc_mach_type); | |
388 | init_tables_p = 1; | |
389 | } | |
390 | ||
391 | /* Skip leading white space. */ | |
392 | while (isspace (*str)) | |
393 | str++; | |
394 | ||
395 | /* The instructions are stored in lists hashed by the first letter (though | |
396 | we needn't care how they're hashed). Get the first in the list. */ | |
397 | ||
0d2bcfaf NC |
398 | ext_opcode = arc_ext_opcodes; |
399 | std_opcode = arc_opcode_lookup_asm (str); | |
252b5132 RH |
400 | |
401 | /* Keep looking until we find a match. */ | |
402 | ||
403 | start = str; | |
19203624 | 404 | for (opcode = (ext_opcode ? ext_opcode : std_opcode); |
0d2bcfaf NC |
405 | opcode != NULL; |
406 | opcode = (ARC_OPCODE_NEXT_ASM (opcode) | |
1e07b820 KH |
407 | ? ARC_OPCODE_NEXT_ASM (opcode) |
408 | : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL))) | |
252b5132 RH |
409 | { |
410 | int past_opcode_p, fc, num_suffixes; | |
0d2bcfaf | 411 | int fix_up_at = 0; |
252b5132 RH |
412 | char *syn; |
413 | struct arc_fixup fixups[MAX_FIXUPS]; | |
414 | /* Used as a sanity check. If we need a limm reloc, make sure we ask | |
415 | for an extra 4 bytes from frag_more. */ | |
416 | int limm_reloc_p; | |
0d2bcfaf | 417 | int ext_suffix_p; |
252b5132 RH |
418 | const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES]; |
419 | ||
420 | /* Is this opcode supported by the selected cpu? */ | |
421 | if (! arc_opcode_supported (opcode)) | |
422 | continue; | |
423 | ||
424 | /* Scan the syntax string. If it doesn't match, try the next one. */ | |
425 | ||
426 | arc_opcode_init_insert (); | |
427 | insn = opcode->value; | |
428 | fc = 0; | |
429 | past_opcode_p = 0; | |
430 | num_suffixes = 0; | |
431 | limm_reloc_p = 0; | |
0d2bcfaf | 432 | ext_suffix_p = 0; |
252b5132 RH |
433 | |
434 | /* We don't check for (*str != '\0') here because we want to parse | |
435 | any trailing fake arguments in the syntax string. */ | |
19203624 | 436 | for (str = start, syn = opcode->syntax; *syn != '\0';) |
252b5132 RH |
437 | { |
438 | int mods; | |
439 | const struct arc_operand *operand; | |
440 | ||
441 | /* Non operand chars must match exactly. */ | |
442 | if (*syn != '%' || *++syn == '%') | |
443 | { | |
444 | /* Handle '+' specially as we want to allow "ld r0,[sp-4]". */ | |
445 | /* ??? The syntax has changed to [sp,-4]. */ | |
446 | if (0 && *syn == '+' && *str == '-') | |
447 | { | |
448 | /* Skip over syn's +, but leave str's - alone. | |
449 | That makes the case identical to "ld r0,[sp+-4]". */ | |
450 | ++syn; | |
451 | } | |
452 | else if (*str == *syn) | |
453 | { | |
454 | if (*syn == ' ') | |
455 | past_opcode_p = 1; | |
456 | ++syn; | |
457 | ++str; | |
458 | } | |
459 | else | |
460 | break; | |
461 | continue; | |
462 | } | |
463 | ||
464 | /* We have an operand. Pick out any modifiers. */ | |
465 | mods = 0; | |
4a314ec8 | 466 | while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags)) |
252b5132 | 467 | { |
4a314ec8 | 468 | mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS; |
252b5132 RH |
469 | ++syn; |
470 | } | |
4a314ec8 | 471 | operand = arc_operands + arc_operand_map[(int) *syn]; |
252b5132 | 472 | if (operand->fmt == 0) |
0d2bcfaf | 473 | as_fatal ("unknown syntax format character `%c'", *syn); |
252b5132 RH |
474 | |
475 | if (operand->flags & ARC_OPERAND_FAKE) | |
476 | { | |
477 | const char *errmsg = NULL; | |
478 | if (operand->insert) | |
479 | { | |
480 | insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg); | |
1e07b820 KH |
481 | if (errmsg != (const char *) NULL) |
482 | { | |
483 | last_errmsg = errmsg; | |
484 | if (operand->flags & ARC_OPERAND_ERROR) | |
485 | { | |
486 | as_bad (errmsg); | |
487 | return; | |
488 | } | |
489 | else if (operand->flags & ARC_OPERAND_WARN) | |
490 | as_warn (errmsg); | |
491 | break; | |
492 | } | |
19203624 KH |
493 | if (limm_reloc_p |
494 | && (operand->flags && operand->flags & ARC_OPERAND_LIMM) | |
495 | && (operand->flags & | |
496 | (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS))) | |
1e07b820 KH |
497 | { |
498 | fixups[fix_up_at].opindex = arc_operand_map[operand->fmt]; | |
499 | } | |
252b5132 RH |
500 | } |
501 | ++syn; | |
502 | } | |
503 | /* Are we finished with suffixes? */ | |
504 | else if (!past_opcode_p) | |
505 | { | |
506 | int found; | |
507 | char c; | |
19203624 KH |
508 | char *s, *t; |
509 | const struct arc_operand_value *suf, *suffix_end; | |
0d2bcfaf | 510 | const struct arc_operand_value *suffix = NULL; |
252b5132 RH |
511 | |
512 | if (!(operand->flags & ARC_OPERAND_SUFFIX)) | |
513 | abort (); | |
514 | ||
515 | /* If we're at a space in the input string, we want to skip the | |
516 | remaining suffixes. There may be some fake ones though, so | |
517 | just go on to try the next one. */ | |
518 | if (*str == ' ') | |
519 | { | |
520 | ++syn; | |
521 | continue; | |
522 | } | |
523 | ||
524 | s = str; | |
525 | if (mods & ARC_MOD_DOT) | |
526 | { | |
527 | if (*s != '.') | |
528 | break; | |
529 | ++s; | |
530 | } | |
531 | else | |
532 | { | |
533 | /* This can happen in "b.nd foo" and we're currently looking | |
534 | for "%q" (ie: a condition code suffix). */ | |
535 | if (*s == '.') | |
536 | { | |
537 | ++syn; | |
538 | continue; | |
539 | } | |
540 | } | |
541 | ||
542 | /* Pick the suffix out and look it up via the hash table. */ | |
0d2bcfaf | 543 | for (t = s; *t && isalnum (*t); ++t) |
252b5132 RH |
544 | continue; |
545 | c = *t; | |
546 | *t = '\0'; | |
19203624 | 547 | if ((suf = get_ext_suffix (s))) |
1e07b820 KH |
548 | ext_suffix_p = 1; |
549 | else | |
550 | suf = hash_find (arc_suffix_hash, s); | |
252b5132 RH |
551 | if (!suf) |
552 | { | |
553 | /* This can happen in "blle foo" and we're currently using | |
554 | the template "b%q%.n %j". The "bl" insn occurs later in | |
555 | the table so "lle" isn't an illegal suffix. */ | |
1e07b820 | 556 | *t = c; |
252b5132 RH |
557 | break; |
558 | } | |
559 | ||
560 | /* Is it the right type? Note that the same character is used | |
1e07b820 | 561 | several times, so we have to examine all of them. This is |
252b5132 RH |
562 | relatively efficient as equivalent entries are kept |
563 | together. If it's not the right type, don't increment `str' | |
564 | so we try the next one in the series. */ | |
565 | found = 0; | |
1e07b820 KH |
566 | if (ext_suffix_p && arc_operands[suf->type].fmt == *syn) |
567 | { | |
568 | /* Insert the suffix's value into the insn. */ | |
569 | *t = c; | |
570 | if (operand->insert) | |
571 | insn = (*operand->insert) (insn, operand, | |
572 | mods, NULL, suf->value, | |
573 | NULL); | |
574 | else | |
575 | insn |= suf->value << operand->shift; | |
576 | ||
577 | str = t; | |
578 | found = 1; | |
579 | } | |
580 | else | |
581 | { | |
582 | *t = c; | |
583 | suffix_end = arc_suffixes + arc_suffixes_count; | |
584 | for (suffix = suf; | |
585 | suffix < suffix_end && strcmp (suffix->name, suf->name) == 0; | |
586 | ++suffix) | |
587 | { | |
588 | if (arc_operands[suffix->type].fmt == *syn) | |
589 | { | |
590 | /* Insert the suffix's value into the insn. */ | |
591 | if (operand->insert) | |
592 | insn = (*operand->insert) (insn, operand, | |
593 | mods, NULL, suffix->value, | |
594 | NULL); | |
595 | else | |
596 | insn |= suffix->value << operand->shift; | |
597 | ||
598 | str = t; | |
599 | found = 1; | |
600 | break; | |
601 | } | |
602 | } | |
603 | } | |
252b5132 RH |
604 | ++syn; |
605 | if (!found) | |
19203624 KH |
606 | /* Wrong type. Just go on to try next insn entry. */ |
607 | ; | |
252b5132 RH |
608 | else |
609 | { | |
610 | if (num_suffixes == MAX_SUFFIXES) | |
0d2bcfaf | 611 | as_bad ("too many suffixes"); |
252b5132 RH |
612 | else |
613 | insn_suffixes[num_suffixes++] = suffix; | |
614 | } | |
615 | } | |
616 | else | |
617 | /* This is either a register or an expression of some kind. */ | |
618 | { | |
252b5132 RH |
619 | char *hold; |
620 | const struct arc_operand_value *reg = NULL; | |
621 | long value = 0; | |
622 | expressionS exp; | |
623 | ||
624 | if (operand->flags & ARC_OPERAND_SUFFIX) | |
625 | abort (); | |
626 | ||
627 | /* Is there anything left to parse? | |
628 | We don't check for this at the top because we want to parse | |
629 | any trailing fake arguments in the syntax string. */ | |
630 | if (*str == '\0') | |
631 | break; | |
252b5132 RH |
632 | |
633 | /* Parse the operand. */ | |
634 | hold = input_line_pointer; | |
635 | input_line_pointer = str; | |
636 | expression (&exp); | |
637 | str = input_line_pointer; | |
638 | input_line_pointer = hold; | |
639 | ||
640 | if (exp.X_op == O_illegal) | |
0d2bcfaf | 641 | as_bad ("illegal operand"); |
252b5132 | 642 | else if (exp.X_op == O_absent) |
0d2bcfaf | 643 | as_bad ("missing operand"); |
252b5132 RH |
644 | else if (exp.X_op == O_constant) |
645 | { | |
646 | value = exp.X_add_number; | |
647 | } | |
648 | else if (exp.X_op == O_register) | |
649 | { | |
0d2bcfaf | 650 | reg = (struct arc_operand_value *) exp.X_add_number; |
252b5132 | 651 | } |
0d2bcfaf NC |
652 | #define IS_REG_DEST_OPERAND(o) ((o) == 'a') |
653 | else if (IS_REG_DEST_OPERAND (*syn)) | |
19203624 | 654 | as_bad ("symbol as destination register"); |
1e07b820 | 655 | else |
252b5132 | 656 | { |
19203624 | 657 | if (!strncmp (str, "@h30", 4)) |
1e07b820 | 658 | { |
19203624 | 659 | arc_code_symbol (&exp); |
1e07b820 KH |
660 | str += 4; |
661 | } | |
252b5132 RH |
662 | /* We need to generate a fixup for this expression. */ |
663 | if (fc >= MAX_FIXUPS) | |
0d2bcfaf | 664 | as_fatal ("too many fixups"); |
252b5132 | 665 | fixups[fc].exp = exp; |
1e07b820 | 666 | /* We don't support shimm relocs. break here to force |
19203624 | 667 | the assembler to output a limm. */ |
0d2bcfaf | 668 | #define IS_REG_SHIMM_OFFSET(o) ((o) == 'd') |
19203624 | 669 | if (IS_REG_SHIMM_OFFSET (*syn)) |
1e07b820 | 670 | break; |
252b5132 RH |
671 | /* If this is a register constant (IE: one whose |
672 | register value gets stored as 61-63) then this | |
bfb32b52 | 673 | must be a limm. */ |
252b5132 RH |
674 | /* ??? This bit could use some cleaning up. |
675 | Referencing the format chars like this goes | |
676 | against style. */ | |
0d2bcfaf | 677 | if (IS_SYMBOL_OPERAND (*syn)) |
252b5132 RH |
678 | { |
679 | const char *junk; | |
252b5132 | 680 | limm_reloc_p = 1; |
19203624 | 681 | /* Save this, we don't yet know what reloc to use. */ |
1e07b820 | 682 | fix_up_at = fc; |
252b5132 RH |
683 | /* Tell insert_reg we need a limm. This is |
684 | needed because the value at this point is | |
685 | zero, a shimm. */ | |
686 | /* ??? We need a cleaner interface than this. */ | |
687 | (*arc_operands[arc_operand_map['Q']].insert) | |
688 | (insn, operand, mods, reg, 0L, &junk); | |
689 | } | |
690 | else | |
4a314ec8 | 691 | fixups[fc].opindex = arc_operand_map[(int) *syn]; |
252b5132 RH |
692 | ++fc; |
693 | value = 0; | |
694 | } | |
695 | ||
696 | /* Insert the register or expression into the instruction. */ | |
697 | if (operand->insert) | |
698 | { | |
699 | const char *errmsg = NULL; | |
700 | insn = (*operand->insert) (insn, operand, mods, | |
701 | reg, (long) value, &errmsg); | |
1e07b820 KH |
702 | if (errmsg != (const char *) NULL) |
703 | { | |
704 | last_errmsg = errmsg; | |
705 | if (operand->flags & ARC_OPERAND_ERROR) | |
706 | { | |
707 | as_bad (errmsg); | |
708 | return; | |
709 | } | |
710 | else if (operand->flags & ARC_OPERAND_WARN) | |
711 | as_warn (errmsg); | |
712 | break; | |
713 | } | |
252b5132 RH |
714 | } |
715 | else | |
716 | insn |= (value & ((1 << operand->bits) - 1)) << operand->shift; | |
717 | ||
718 | ++syn; | |
719 | } | |
720 | } | |
721 | ||
722 | /* If we're at the end of the syntax string, we're done. */ | |
723 | /* FIXME: try to move this to a separate function. */ | |
724 | if (*syn == '\0') | |
725 | { | |
726 | int i; | |
727 | char *f; | |
728 | long limm, limm_p; | |
729 | ||
730 | /* For the moment we assume a valid `str' can only contain blanks | |
731 | now. IE: We needn't try again with a longer version of the | |
732 | insn and it is assumed that longer versions of insns appear | |
733 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
734 | ||
735 | while (isspace (*str)) | |
736 | ++str; | |
737 | ||
738 | if (*str != '\0') | |
0d2bcfaf | 739 | as_bad ("junk at end of line: `%s'", str); |
252b5132 RH |
740 | |
741 | /* Is there a limm value? */ | |
742 | limm_p = arc_opcode_limm_p (&limm); | |
743 | ||
744 | /* Perform various error and warning tests. */ | |
745 | ||
746 | { | |
747 | static int in_delay_slot_p = 0; | |
748 | static int prev_insn_needs_cc_nop_p = 0; | |
749 | /* delay slot type seen */ | |
750 | int delay_slot_type = ARC_DELAY_NONE; | |
751 | /* conditional execution flag seen */ | |
752 | int conditional = 0; | |
753 | /* 1 if condition codes are being set */ | |
754 | int cc_set_p = 0; | |
755 | /* 1 if conditional branch, including `b' "branch always" */ | |
756 | int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH; | |
252b5132 RH |
757 | |
758 | for (i = 0; i < num_suffixes; ++i) | |
759 | { | |
760 | switch (arc_operands[insn_suffixes[i]->type].fmt) | |
761 | { | |
19203624 | 762 | case 'n': |
252b5132 RH |
763 | delay_slot_type = insn_suffixes[i]->value; |
764 | break; | |
19203624 | 765 | case 'q': |
252b5132 RH |
766 | conditional = insn_suffixes[i]->value; |
767 | break; | |
19203624 | 768 | case 'f': |
252b5132 RH |
769 | cc_set_p = 1; |
770 | break; | |
771 | } | |
772 | } | |
773 | ||
774 | /* Putting an insn with a limm value in a delay slot is supposed to | |
775 | be legal, but let's warn the user anyway. Ditto for 8 byte | |
776 | jumps with delay slots. */ | |
777 | if (in_delay_slot_p && limm_p) | |
1e07b820 | 778 | as_warn ("8 byte instruction in delay slot"); |
0d2bcfaf | 779 | if (delay_slot_type != ARC_DELAY_NONE |
19203624 | 780 | && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */ |
1e07b820 | 781 | as_warn ("8 byte jump instruction with delay slot"); |
252b5132 RH |
782 | in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p; |
783 | ||
784 | /* Warn when a conditional branch immediately follows a set of | |
785 | the condition codes. Note that this needn't be done if the | |
786 | insn that sets the condition codes uses a limm. */ | |
787 | if (cond_branch_p && conditional != 0 /* 0 = "always" */ | |
0d2bcfaf | 788 | && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5) |
1e07b820 | 789 | as_warn ("conditional branch follows set of flags"); |
0d2bcfaf | 790 | prev_insn_needs_cc_nop_p = |
1e07b820 KH |
791 | /* FIXME: ??? not required: |
792 | (delay_slot_type != ARC_DELAY_NONE) && */ | |
793 | cc_set_p && !limm_p; | |
252b5132 RH |
794 | } |
795 | ||
796 | /* Write out the instruction. | |
797 | It is important to fetch enough space in one call to `frag_more'. | |
798 | We use (f - frag_now->fr_literal) to compute where we are and we | |
799 | don't want frag_now to change between calls. */ | |
800 | if (limm_p) | |
801 | { | |
802 | f = frag_more (8); | |
803 | md_number_to_chars (f, insn, 4); | |
804 | md_number_to_chars (f + 4, limm, 4); | |
805 | } | |
806 | else if (limm_reloc_p) | |
807 | { | |
808 | /* We need a limm reloc, but the tables think we don't. */ | |
809 | abort (); | |
810 | } | |
811 | else | |
812 | { | |
813 | f = frag_more (4); | |
814 | md_number_to_chars (f, insn, 4); | |
815 | } | |
816 | ||
817 | /* Create any fixups. */ | |
818 | for (i = 0; i < fc; ++i) | |
819 | { | |
820 | int op_type, reloc_type; | |
821 | expressionS exptmp; | |
822 | const struct arc_operand *operand; | |
823 | ||
824 | /* Create a fixup for this operand. | |
825 | At this point we do not use a bfd_reloc_code_real_type for | |
826 | operands residing in the insn, but instead just use the | |
827 | operand index. This lets us easily handle fixups for any | |
828 | operand type, although that is admittedly not a very exciting | |
829 | feature. We pick a BFD reloc type in md_apply_fix. | |
830 | ||
831 | Limm values (4 byte immediate "constants") must be treated | |
832 | normally because they're not part of the actual insn word | |
833 | and thus the insertion routines don't handle them. */ | |
834 | ||
835 | if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM) | |
836 | { | |
19203624 KH |
837 | /* Modify the fixup addend as required by the cpu. */ |
838 | fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn); | |
252b5132 RH |
839 | op_type = fixups[i].opindex; |
840 | /* FIXME: can we add this data to the operand table? */ | |
0d2bcfaf | 841 | if (op_type == arc_operand_map['L'] |
1e07b820 KH |
842 | || op_type == arc_operand_map['s'] |
843 | || op_type == arc_operand_map['o'] | |
844 | || op_type == arc_operand_map['O']) | |
252b5132 RH |
845 | reloc_type = BFD_RELOC_32; |
846 | else if (op_type == arc_operand_map['J']) | |
847 | reloc_type = BFD_RELOC_ARC_B26; | |
848 | else | |
849 | abort (); | |
850 | reloc_type = get_arc_exp_reloc_type (1, reloc_type, | |
851 | &fixups[i].exp, | |
852 | &exptmp); | |
853 | } | |
854 | else | |
855 | { | |
856 | op_type = get_arc_exp_reloc_type (0, fixups[i].opindex, | |
857 | &fixups[i].exp, &exptmp); | |
858 | reloc_type = op_type + (int) BFD_RELOC_UNUSED; | |
859 | } | |
860 | operand = &arc_operands[op_type]; | |
861 | fix_new_exp (frag_now, | |
862 | ((f - frag_now->fr_literal) | |
863 | + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4, | |
864 | &exptmp, | |
865 | (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0, | |
866 | (bfd_reloc_code_real_type) reloc_type); | |
867 | } | |
868 | ||
869 | /* All done. */ | |
870 | return; | |
871 | } | |
872 | ||
873 | /* Try the next entry. */ | |
874 | } | |
875 | ||
19203624 | 876 | if (NULL == last_errmsg) |
0d2bcfaf NC |
877 | as_bad ("bad instruction `%s'", start); |
878 | else | |
879 | as_bad (last_errmsg); | |
252b5132 RH |
880 | } |
881 | \f | |
252b5132 | 882 | static void |
0d2bcfaf NC |
883 | arc_extoper (opertype) |
884 | int opertype; | |
252b5132 RH |
885 | { |
886 | char *name; | |
0d2bcfaf | 887 | char *mode; |
252b5132 RH |
888 | char c; |
889 | char *p; | |
0d2bcfaf NC |
890 | int imode = 0; |
891 | int number; | |
892 | struct arc_ext_operand_value *ext_oper; | |
252b5132 RH |
893 | symbolS *symbolP; |
894 | ||
0d2bcfaf NC |
895 | segT old_sec; |
896 | int old_subsec; | |
897 | ||
252b5132 RH |
898 | name = input_line_pointer; |
899 | c = get_symbol_end (); | |
19203624 | 900 | name = xstrdup (name); |
0d2bcfaf NC |
901 | if (NULL == name) |
902 | { | |
19203624 | 903 | ignore_rest_of_line (); |
1e07b820 | 904 | return; |
0d2bcfaf NC |
905 | } |
906 | ||
907 | p = name; | |
908 | while (*p) | |
909 | { | |
19203624 KH |
910 | if (isupper (*p)) |
911 | *p = tolower (*p); | |
1e07b820 | 912 | p++; |
0d2bcfaf NC |
913 | } |
914 | ||
252b5132 RH |
915 | /* just after name is now '\0' */ |
916 | p = input_line_pointer; | |
917 | *p = c; | |
918 | SKIP_WHITESPACE (); | |
0d2bcfaf | 919 | |
252b5132 RH |
920 | if (*input_line_pointer != ',') |
921 | { | |
0d2bcfaf | 922 | as_bad ("expected comma after operand name"); |
252b5132 | 923 | ignore_rest_of_line (); |
19203624 | 924 | free (name); |
252b5132 RH |
925 | return; |
926 | } | |
0d2bcfaf | 927 | |
252b5132 | 928 | input_line_pointer++; /* skip ',' */ |
0d2bcfaf NC |
929 | number = get_absolute_expression (); |
930 | ||
19203624 | 931 | if (number < 0) |
0d2bcfaf | 932 | { |
19203624 KH |
933 | as_bad ("negative operand number %d", number); |
934 | ignore_rest_of_line (); | |
935 | free (name); | |
1e07b820 | 936 | return; |
0d2bcfaf NC |
937 | } |
938 | ||
939 | if (opertype) | |
940 | { | |
19203624 | 941 | SKIP_WHITESPACE (); |
0d2bcfaf NC |
942 | |
943 | if (*input_line_pointer != ',') | |
1e07b820 KH |
944 | { |
945 | as_bad ("expected comma after register-number"); | |
946 | ignore_rest_of_line (); | |
19203624 | 947 | free (name); |
1e07b820 KH |
948 | return; |
949 | } | |
bfb32b52 | 950 | |
0d2bcfaf NC |
951 | input_line_pointer++; /* skip ',' */ |
952 | mode = input_line_pointer; | |
bfb32b52 | 953 | |
19203624 | 954 | if (!strncmp (mode, "r|w", 3)) |
1e07b820 KH |
955 | { |
956 | imode = 0; | |
957 | input_line_pointer += 3; | |
958 | } | |
0d2bcfaf | 959 | else |
1e07b820 | 960 | { |
19203624 | 961 | if (!strncmp (mode, "r", 1)) |
1e07b820 KH |
962 | { |
963 | imode = ARC_REGISTER_READONLY; | |
964 | input_line_pointer += 1; | |
965 | } | |
966 | else | |
967 | { | |
19203624 | 968 | if (strncmp (mode, "w", 1)) |
1e07b820 KH |
969 | { |
970 | as_bad ("invalid mode"); | |
19203624 KH |
971 | ignore_rest_of_line (); |
972 | free (name); | |
1e07b820 KH |
973 | return; |
974 | } | |
975 | else | |
976 | { | |
977 | imode = ARC_REGISTER_WRITEONLY; | |
978 | input_line_pointer += 1; | |
979 | } | |
980 | } | |
981 | } | |
19203624 | 982 | SKIP_WHITESPACE (); |
1e07b820 KH |
983 | if (1 == opertype) |
984 | { | |
985 | if (*input_line_pointer != ',') | |
986 | { | |
987 | as_bad ("expected comma after register-mode"); | |
988 | ignore_rest_of_line (); | |
19203624 | 989 | free (name); |
1e07b820 KH |
990 | return; |
991 | } | |
992 | ||
993 | input_line_pointer++; /* skip ',' */ | |
994 | ||
19203624 | 995 | if (!strncmp (input_line_pointer, "cannot_shortcut", 15)) |
1e07b820 | 996 | { |
19203624 | 997 | imode |= arc_get_noshortcut_flag (); |
1e07b820 KH |
998 | input_line_pointer += 15; |
999 | } | |
1000 | else | |
1001 | { | |
19203624 | 1002 | if (strncmp (input_line_pointer, "can_shortcut", 12)) |
1e07b820 KH |
1003 | { |
1004 | as_bad ("shortcut designator invalid"); | |
19203624 KH |
1005 | ignore_rest_of_line (); |
1006 | free (name); | |
1e07b820 KH |
1007 | return; |
1008 | } | |
1009 | else | |
1010 | { | |
1011 | input_line_pointer += 12; | |
1012 | } | |
1013 | } | |
1014 | } | |
1015 | } | |
0d2bcfaf NC |
1016 | |
1017 | if ((opertype == 1) && number > 60) | |
1e07b820 | 1018 | { |
19203624 KH |
1019 | as_bad ("core register value (%d) too large", number); |
1020 | ignore_rest_of_line (); | |
1021 | free (name); | |
1e07b820 KH |
1022 | return; |
1023 | } | |
0d2bcfaf NC |
1024 | |
1025 | if ((opertype == 0) && number > 31) | |
1e07b820 | 1026 | { |
19203624 KH |
1027 | as_bad ("condition code value (%d) too large", number); |
1028 | ignore_rest_of_line (); | |
1029 | free (name); | |
1e07b820 KH |
1030 | return; |
1031 | } | |
0d2bcfaf NC |
1032 | |
1033 | ext_oper = (struct arc_ext_operand_value *) \ | |
19203624 | 1034 | xmalloc (sizeof (struct arc_ext_operand_value)); |
0d2bcfaf | 1035 | |
19203624 | 1036 | if (opertype) |
0d2bcfaf | 1037 | { |
19203624 | 1038 | /* If the symbol already exists, point it at the new definition. */ |
0d2bcfaf | 1039 | if ((symbolP = symbol_find (name))) |
1e07b820 | 1040 | { |
19203624 KH |
1041 | if (S_GET_SEGMENT (symbolP) == reg_section) |
1042 | S_SET_VALUE (symbolP, (int) &ext_oper->operand); | |
1e07b820 KH |
1043 | else |
1044 | { | |
19203624 KH |
1045 | as_bad ("attempt to override symbol: %s", name); |
1046 | ignore_rest_of_line (); | |
1047 | free (name); | |
1048 | free (ext_oper); | |
1e07b820 KH |
1049 | return; |
1050 | } | |
1051 | } | |
0d2bcfaf | 1052 | else |
1e07b820 | 1053 | { |
19203624 | 1054 | /* If its not there, add it. */ |
1e07b820 KH |
1055 | symbol_table_insert (symbol_create (name, reg_section, |
1056 | (int) &ext_oper->operand, &zero_address_frag)); | |
1057 | } | |
0d2bcfaf NC |
1058 | } |
1059 | ||
1060 | ext_oper->operand.name = name; | |
1061 | ext_oper->operand.value = number; | |
19203624 | 1062 | ext_oper->operand.type = arc_operand_type (opertype); |
0d2bcfaf NC |
1063 | ext_oper->operand.flags = imode; |
1064 | ||
1065 | ext_oper->next = arc_ext_operands; | |
1066 | arc_ext_operands = ext_oper; | |
1067 | ||
19203624 KH |
1068 | /* OK, now that we know what this operand is, put a description in |
1069 | the arc extension section of the output file. */ | |
0d2bcfaf NC |
1070 | |
1071 | old_sec = now_seg; | |
1072 | old_subsec = now_subseg; | |
1073 | ||
19203624 | 1074 | arc_set_ext_seg (); |
0d2bcfaf NC |
1075 | |
1076 | switch (opertype) | |
1e07b820 KH |
1077 | { |
1078 | case 0: | |
19203624 KH |
1079 | p = frag_more (1); |
1080 | *p = 3 + strlen (name) + 1; | |
1081 | p = frag_more (1); | |
1e07b820 | 1082 | *p = EXT_COND_CODE; |
19203624 | 1083 | p = frag_more (1); |
1e07b820 | 1084 | *p = number; |
19203624 KH |
1085 | p = frag_more (strlen (name) + 1); |
1086 | strcpy (p, name); | |
1e07b820 KH |
1087 | break; |
1088 | case 1: | |
19203624 KH |
1089 | p = frag_more (1); |
1090 | *p = 3 + strlen (name) + 1; | |
1091 | p = frag_more (1); | |
1e07b820 | 1092 | *p = EXT_CORE_REGISTER; |
19203624 | 1093 | p = frag_more (1); |
1e07b820 | 1094 | *p = number; |
19203624 KH |
1095 | p = frag_more (strlen (name) + 1); |
1096 | strcpy (p, name); | |
1e07b820 KH |
1097 | break; |
1098 | case 2: | |
19203624 KH |
1099 | p = frag_more (1); |
1100 | *p = 6 + strlen (name) + 1; | |
1101 | p = frag_more (1); | |
1e07b820 | 1102 | *p = EXT_AUX_REGISTER; |
19203624 | 1103 | p = frag_more (1); |
1e07b820 | 1104 | *p = number >> 24 & 0xff; |
19203624 | 1105 | p = frag_more (1); |
1e07b820 | 1106 | *p = number >> 16 & 0xff; |
19203624 | 1107 | p = frag_more (1); |
1e07b820 | 1108 | *p = number >> 8 & 0xff; |
19203624 | 1109 | p = frag_more (1); |
1e07b820 | 1110 | *p = number & 0xff; |
19203624 KH |
1111 | p = frag_more (strlen (name) + 1); |
1112 | strcpy (p, name); | |
1e07b820 KH |
1113 | break; |
1114 | default: | |
19203624 KH |
1115 | as_bad ("invalid opertype"); |
1116 | ignore_rest_of_line (); | |
1117 | free (name); | |
1e07b820 KH |
1118 | return; |
1119 | break; | |
1120 | } | |
0d2bcfaf NC |
1121 | |
1122 | subseg_set (old_sec, old_subsec); | |
1123 | ||
19203624 | 1124 | /* Enter all registers into the symbol table. */ |
0d2bcfaf | 1125 | |
19203624 | 1126 | demand_empty_rest_of_line (); |
0d2bcfaf NC |
1127 | } |
1128 | ||
1129 | static void | |
1130 | arc_extinst (ignore) | |
19203624 | 1131 | int ignore ATTRIBUTE_UNUSED; |
0d2bcfaf NC |
1132 | { |
1133 | unsigned char syntax[129]; | |
1134 | char *name; | |
1135 | char *p; | |
1136 | char c; | |
1137 | int suffixcode = -1; | |
19203624 | 1138 | int opcode, subopcode; |
0d2bcfaf NC |
1139 | int i; |
1140 | int class = 0; | |
1141 | int name_len; | |
1142 | struct arc_opcode *ext_op; | |
1143 | ||
1144 | segT old_sec; | |
1145 | int old_subsec; | |
1146 | ||
1147 | name = input_line_pointer; | |
1148 | c = get_symbol_end (); | |
19203624 | 1149 | name = xstrdup (name); |
0d2bcfaf NC |
1150 | if (NULL == name) |
1151 | { | |
19203624 | 1152 | ignore_rest_of_line (); |
1e07b820 | 1153 | return; |
0d2bcfaf | 1154 | } |
19203624 KH |
1155 | strcpy (syntax, name); |
1156 | name_len = strlen (name); | |
0d2bcfaf NC |
1157 | |
1158 | /* just after name is now '\0' */ | |
1159 | p = input_line_pointer; | |
1160 | *p = c; | |
1161 | ||
1162 | SKIP_WHITESPACE (); | |
1163 | ||
1164 | if (*input_line_pointer != ',') | |
252b5132 | 1165 | { |
0d2bcfaf | 1166 | as_bad ("expected comma after operand name"); |
252b5132 RH |
1167 | ignore_rest_of_line (); |
1168 | return; | |
1169 | } | |
0d2bcfaf NC |
1170 | |
1171 | input_line_pointer++; /* skip ',' */ | |
1172 | opcode = get_absolute_expression (); | |
1173 | ||
1174 | SKIP_WHITESPACE (); | |
1175 | ||
1176 | if (*input_line_pointer != ',') | |
252b5132 | 1177 | { |
0d2bcfaf | 1178 | as_bad ("expected comma after opcode"); |
252b5132 RH |
1179 | ignore_rest_of_line (); |
1180 | return; | |
1181 | } | |
0d2bcfaf NC |
1182 | |
1183 | input_line_pointer++; /* skip ',' */ | |
1184 | subopcode = get_absolute_expression (); | |
1185 | ||
19203624 | 1186 | if (subopcode < 0) |
252b5132 | 1187 | { |
19203624 KH |
1188 | as_bad ("negative subopcode %d", subopcode); |
1189 | ignore_rest_of_line (); | |
1e07b820 | 1190 | return; |
252b5132 | 1191 | } |
0d2bcfaf | 1192 | |
19203624 | 1193 | if (subopcode) |
0d2bcfaf | 1194 | { |
19203624 | 1195 | if (3 != opcode) |
1e07b820 KH |
1196 | { |
1197 | as_bad ("subcode value found when opcode not equal 0x03"); | |
19203624 | 1198 | ignore_rest_of_line (); |
1e07b820 KH |
1199 | return; |
1200 | } | |
1201 | else | |
1202 | { | |
1203 | if (subopcode < 0x09 || subopcode == 0x3f) | |
1204 | { | |
1205 | as_bad ("invalid subopcode %d", subopcode); | |
19203624 | 1206 | ignore_rest_of_line (); |
1e07b820 KH |
1207 | return; |
1208 | } | |
1209 | } | |
0d2bcfaf NC |
1210 | } |
1211 | ||
1212 | SKIP_WHITESPACE (); | |
1213 | ||
252b5132 RH |
1214 | if (*input_line_pointer != ',') |
1215 | { | |
0d2bcfaf | 1216 | as_bad ("expected comma after subopcode"); |
252b5132 RH |
1217 | ignore_rest_of_line (); |
1218 | return; | |
1219 | } | |
0d2bcfaf NC |
1220 | |
1221 | input_line_pointer++; /* skip ',' */ | |
1222 | ||
19203624 | 1223 | for (i = 0; i < (int) MAXSUFFIXCLASS; i++) |
0d2bcfaf | 1224 | { |
19203624 | 1225 | if (!strncmp (suffixclass[i].name,input_line_pointer, suffixclass[i].len)) |
1e07b820 KH |
1226 | { |
1227 | suffixcode = i; | |
1228 | input_line_pointer += suffixclass[i].len; | |
1229 | break; | |
1230 | } | |
0d2bcfaf NC |
1231 | } |
1232 | ||
19203624 | 1233 | if (-1 == suffixcode) |
0d2bcfaf NC |
1234 | { |
1235 | as_bad ("invalid suffix class"); | |
1236 | ignore_rest_of_line (); | |
1237 | return; | |
1238 | } | |
1239 | ||
252b5132 | 1240 | SKIP_WHITESPACE (); |
0d2bcfaf NC |
1241 | |
1242 | if (*input_line_pointer != ',') | |
252b5132 | 1243 | { |
0d2bcfaf NC |
1244 | as_bad ("expected comma after suffix class"); |
1245 | ignore_rest_of_line (); | |
1246 | return; | |
252b5132 | 1247 | } |
0d2bcfaf NC |
1248 | |
1249 | input_line_pointer++; /* skip ',' */ | |
1250 | ||
19203624 | 1251 | for (i = 0; i < (int) MAXSYNTAXCLASS; i++) |
252b5132 | 1252 | { |
19203624 | 1253 | if (!strncmp (syntaxclass[i].name,input_line_pointer, syntaxclass[i].len)) |
1e07b820 KH |
1254 | { |
1255 | class = syntaxclass[i].class; | |
1256 | input_line_pointer += syntaxclass[i].len; | |
1257 | break; | |
1258 | } | |
252b5132 | 1259 | } |
252b5132 | 1260 | |
19203624 | 1261 | if (0 == (SYNTAX_VALID & class)) |
0d2bcfaf NC |
1262 | { |
1263 | as_bad ("invalid syntax class"); | |
1264 | ignore_rest_of_line (); | |
1265 | return; | |
1266 | } | |
1267 | ||
19203624 | 1268 | if ((0x3 == opcode) & (class & SYNTAX_3OP)) |
0d2bcfaf NC |
1269 | { |
1270 | as_bad ("opcode 0x3 and SYNTAX_3OP invalid"); | |
1271 | ignore_rest_of_line (); | |
1272 | return; | |
1273 | } | |
1274 | ||
1275 | switch (suffixcode) | |
1e07b820 KH |
1276 | { |
1277 | case 0: | |
19203624 | 1278 | strcat (syntax, "%.q%.f "); |
1e07b820 KH |
1279 | break; |
1280 | case 1: | |
19203624 | 1281 | strcat (syntax, "%.f "); |
1e07b820 KH |
1282 | break; |
1283 | case 2: | |
19203624 | 1284 | strcat (syntax, "%.q "); |
1e07b820 KH |
1285 | break; |
1286 | case 3: | |
19203624 | 1287 | strcat (syntax, " "); |
1e07b820 KH |
1288 | break; |
1289 | default: | |
19203624 KH |
1290 | as_bad ("unknown suffix class"); |
1291 | ignore_rest_of_line (); | |
1e07b820 KH |
1292 | return; |
1293 | break; | |
1294 | }; | |
0d2bcfaf | 1295 | |
19203624 KH |
1296 | strcat (syntax, ((opcode == 0x3) ? "%a,%b" : ((class & SYNTAX_3OP) ? "%a,%b,%c" : "%b,%c"))); |
1297 | if (suffixcode < 2) | |
1298 | strcat (syntax, "%F"); | |
1299 | strcat (syntax, "%S%L"); | |
0d2bcfaf | 1300 | |
19203624 KH |
1301 | ext_op = (struct arc_opcode *) xmalloc (sizeof (struct arc_opcode)); |
1302 | if (NULL == ext_op) | |
0d2bcfaf | 1303 | { |
1e07b820 KH |
1304 | ignore_rest_of_line (); |
1305 | return; | |
0d2bcfaf NC |
1306 | } |
1307 | ||
19203624 | 1308 | ext_op->syntax = xstrdup (syntax); |
0d2bcfaf NC |
1309 | if (NULL == ext_op->syntax) |
1310 | { | |
1e07b820 KH |
1311 | ignore_rest_of_line (); |
1312 | return; | |
0d2bcfaf NC |
1313 | } |
1314 | ||
19203624 KH |
1315 | ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0); |
1316 | ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0); | |
0d2bcfaf NC |
1317 | ext_op->flags = class; |
1318 | ext_op->next_asm = arc_ext_opcodes; | |
1319 | ext_op->next_dis = arc_ext_opcodes; | |
1320 | arc_ext_opcodes = ext_op; | |
1321 | ||
19203624 KH |
1322 | /* OK, now that we know what this inst is, put a description in the |
1323 | arc extension section of the output file. */ | |
0d2bcfaf NC |
1324 | |
1325 | old_sec = now_seg; | |
1326 | old_subsec = now_subseg; | |
1327 | ||
19203624 | 1328 | arc_set_ext_seg (); |
0d2bcfaf | 1329 | |
19203624 KH |
1330 | p = frag_more (1); |
1331 | *p = 5 + name_len + 1; | |
1332 | p = frag_more (1); | |
0d2bcfaf | 1333 | *p = EXT_INSTRUCTION; |
19203624 | 1334 | p = frag_more (1); |
0d2bcfaf | 1335 | *p = opcode; |
19203624 | 1336 | p = frag_more (1); |
0d2bcfaf | 1337 | *p = subopcode; |
19203624 | 1338 | p = frag_more (1); |
0d2bcfaf | 1339 | *p = (class & (OP1_MUST_BE_IMM | OP1_IMM_IMPLIED) ? IGNORE_FIRST_OPD : 0); |
19203624 KH |
1340 | p = frag_more (name_len); |
1341 | strncpy (p, syntax, name_len); | |
1342 | p = frag_more (1); | |
0d2bcfaf NC |
1343 | *p = '\0'; |
1344 | ||
1345 | subseg_set (old_sec, old_subsec); | |
1346 | ||
19203624 | 1347 | demand_empty_rest_of_line (); |
252b5132 RH |
1348 | } |
1349 | ||
0d2bcfaf | 1350 | int |
19203624 | 1351 | arc_set_ext_seg () |
0d2bcfaf NC |
1352 | { |
1353 | if (!arcext_section) | |
1354 | { | |
1355 | arcext_section = subseg_new (".arcextmap", 0); | |
1356 | bfd_set_section_flags (stdoutput, arcext_section, | |
19203624 | 1357 | SEC_READONLY | SEC_HAS_CONTENTS); |
0d2bcfaf NC |
1358 | } |
1359 | else | |
1360 | subseg_set (arcext_section, 0); | |
1361 | return 1; | |
1362 | } | |
252b5132 RH |
1363 | |
1364 | static void | |
0d2bcfaf NC |
1365 | arc_common (localScope) |
1366 | int localScope; | |
252b5132 | 1367 | { |
0d2bcfaf | 1368 | char *name; |
252b5132 | 1369 | char c; |
0d2bcfaf | 1370 | char *p; |
19203624 | 1371 | int align, size; |
0d2bcfaf | 1372 | symbolS *symbolP; |
252b5132 | 1373 | |
0d2bcfaf NC |
1374 | name = input_line_pointer; |
1375 | c = get_symbol_end (); | |
1376 | /* just after name is now '\0' */ | |
1377 | p = input_line_pointer; | |
1378 | *p = c; | |
1379 | SKIP_WHITESPACE (); | |
1380 | ||
1381 | if (*input_line_pointer != ',') | |
252b5132 | 1382 | { |
0d2bcfaf | 1383 | as_bad ("expected comma after symbol name"); |
252b5132 RH |
1384 | ignore_rest_of_line (); |
1385 | return; | |
1386 | } | |
1387 | ||
0d2bcfaf NC |
1388 | input_line_pointer++; /* skip ',' */ |
1389 | size = get_absolute_expression (); | |
252b5132 | 1390 | |
0d2bcfaf NC |
1391 | if (size < 0) |
1392 | { | |
1393 | as_bad ("negative symbol length"); | |
1394 | ignore_rest_of_line (); | |
1395 | return; | |
1396 | } | |
252b5132 | 1397 | |
0d2bcfaf NC |
1398 | *p = 0; |
1399 | symbolP = symbol_find_or_make (name); | |
1400 | *p = c; | |
1401 | ||
1402 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
1403 | { | |
1404 | as_bad ("ignoring attempt to re-define symbol"); | |
1405 | ignore_rest_of_line (); | |
1406 | return; | |
1407 | } | |
19203624 KH |
1408 | if (((int) S_GET_VALUE (symbolP) != 0) \ |
1409 | && ((int) S_GET_VALUE (symbolP) != size)) | |
0d2bcfaf NC |
1410 | { |
1411 | as_warn ("length of symbol \"%s\" already %ld, ignoring %d", | |
1412 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
1413 | } | |
1414 | assert (symbolP->sy_frag == &zero_address_frag); | |
1415 | ||
0d2bcfaf NC |
1416 | /* Now parse the alignment field. This field is optional for |
1417 | local and global symbols. Default alignment is zero. */ | |
1418 | if (*input_line_pointer == ',') | |
1419 | { | |
1420 | input_line_pointer++; | |
1421 | align = get_absolute_expression (); | |
1422 | if (align < 0) | |
1423 | { | |
1424 | align = 0; | |
1425 | as_warn ("assuming symbol alignment of zero"); | |
1426 | } | |
1427 | } | |
252b5132 | 1428 | else |
0d2bcfaf NC |
1429 | align = 0; |
1430 | ||
1431 | if (localScope != 0) | |
252b5132 | 1432 | { |
0d2bcfaf NC |
1433 | segT old_sec; |
1434 | int old_subsec; | |
1435 | char *pfrag; | |
1436 | ||
1437 | old_sec = now_seg; | |
1438 | old_subsec = now_subseg; | |
1439 | record_alignment (bss_section, align); | |
1440 | subseg_set (bss_section, 0); /* ??? subseg_set (bss_section, 1); ??? */ | |
1441 | ||
1442 | if (align) | |
19203624 KH |
1443 | /* Do alignment. */ |
1444 | frag_align (align, 0, 0); | |
0d2bcfaf | 1445 | |
19203624 | 1446 | /* Detach from old frag. */ |
0d2bcfaf NC |
1447 | if (S_GET_SEGMENT (symbolP) == bss_section) |
1448 | symbolP->sy_frag->fr_symbol = NULL; | |
1449 | ||
1450 | symbolP->sy_frag = frag_now; | |
1451 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, | |
19203624 | 1452 | (offsetT) size, (char *) 0); |
0d2bcfaf NC |
1453 | *pfrag = 0; |
1454 | ||
1455 | S_SET_SIZE (symbolP, size); | |
1456 | S_SET_SEGMENT (symbolP, bss_section); | |
1457 | S_CLEAR_EXTERNAL (symbolP); | |
1458 | symbolP->local = 1; | |
1459 | subseg_set (old_sec, old_subsec); | |
1460 | } | |
1461 | else | |
1462 | { | |
1463 | S_SET_VALUE (symbolP, (valueT) size); | |
1464 | S_SET_ALIGN (symbolP, align); | |
1465 | S_SET_EXTERNAL (symbolP); | |
1466 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
252b5132 | 1467 | } |
252b5132 | 1468 | |
0d2bcfaf NC |
1469 | symbolP->bsym->flags |= BSF_OBJECT; |
1470 | ||
1471 | demand_empty_rest_of_line (); | |
1472 | return; | |
252b5132 | 1473 | } |
0d2bcfaf | 1474 | \f |
0d2bcfaf | 1475 | /* Select the cpu we're assembling for. */ |
252b5132 RH |
1476 | |
1477 | static void | |
0d2bcfaf | 1478 | arc_option (ignore) |
19203624 | 1479 | int ignore ATTRIBUTE_UNUSED; |
252b5132 | 1480 | { |
0d2bcfaf | 1481 | int mach; |
252b5132 | 1482 | char c; |
0d2bcfaf | 1483 | char *cpu; |
252b5132 | 1484 | |
0d2bcfaf | 1485 | cpu = input_line_pointer; |
252b5132 | 1486 | c = get_symbol_end (); |
0d2bcfaf | 1487 | mach = arc_get_mach (cpu); |
252b5132 RH |
1488 | *input_line_pointer = c; |
1489 | ||
0d2bcfaf NC |
1490 | /* If an instruction has already been seen, it's too late. */ |
1491 | if (cpu_tables_init_p) | |
252b5132 | 1492 | { |
0d2bcfaf | 1493 | as_bad ("\".option\" directive must appear before any instructions"); |
252b5132 RH |
1494 | ignore_rest_of_line (); |
1495 | return; | |
1496 | } | |
252b5132 | 1497 | |
0d2bcfaf NC |
1498 | if (mach == -1) |
1499 | goto bad_cpu; | |
1500 | ||
1501 | if (mach_type_specified_p && mach != arc_mach_type) | |
252b5132 | 1502 | { |
0d2bcfaf | 1503 | as_bad ("\".option\" directive conflicts with initial definition"); |
252b5132 RH |
1504 | ignore_rest_of_line (); |
1505 | return; | |
1506 | } | |
0d2bcfaf NC |
1507 | else |
1508 | { | |
1509 | /* The cpu may have been selected on the command line. */ | |
1510 | if (mach != arc_mach_type) | |
1511 | as_warn ("\".option\" directive overrides command-line (default) value"); | |
1512 | arc_mach_type = mach; | |
1513 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) | |
1514 | as_fatal ("could not set architecture and machine"); | |
1515 | mach_type_specified_p = 1; | |
1516 | } | |
252b5132 | 1517 | demand_empty_rest_of_line (); |
0d2bcfaf NC |
1518 | return; |
1519 | ||
1520 | bad_cpu: | |
1521 | as_bad ("invalid identifier for \".option\""); | |
1522 | ignore_rest_of_line (); | |
252b5132 | 1523 | } |
252b5132 | 1524 | \f |
19203624 KH |
1525 | /* Turn a string in input_line_pointer into a floating point constant |
1526 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
1527 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
1528 | returned, or NULL on OK. */ | |
252b5132 | 1529 | |
0d2bcfaf | 1530 | /* Equal to MAX_PRECISION in atof-ieee.c */ |
252b5132 RH |
1531 | #define MAX_LITTLENUMS 6 |
1532 | ||
1533 | char * | |
1534 | md_atof (type, litP, sizeP) | |
19203624 KH |
1535 | char type; |
1536 | char *litP; | |
1537 | int *sizeP; | |
252b5132 RH |
1538 | { |
1539 | int prec; | |
1540 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
1541 | LITTLENUM_TYPE *wordP; | |
1542 | char *t; | |
1543 | char *atof_ieee (); | |
1544 | ||
1545 | switch (type) | |
1546 | { | |
1547 | case 'f': | |
1548 | case 'F': | |
1549 | prec = 2; | |
1550 | break; | |
1551 | ||
1552 | case 'd': | |
1553 | case 'D': | |
1554 | prec = 4; | |
1555 | break; | |
1556 | ||
1557 | default: | |
1558 | *sizeP = 0; | |
0d2bcfaf | 1559 | return "bad call to md_atof"; |
252b5132 RH |
1560 | } |
1561 | ||
1562 | t = atof_ieee (input_line_pointer, type, words); | |
1563 | if (t) | |
1564 | input_line_pointer = t; | |
1565 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
1566 | for (wordP = words; prec--;) | |
1567 | { | |
1568 | md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE)); | |
1569 | litP += sizeof (LITTLENUM_TYPE); | |
1570 | } | |
1571 | ||
1572 | return NULL; | |
1573 | } | |
1574 | ||
1575 | /* Write a value out to the object file, using the appropriate | |
1576 | endianness. */ | |
1577 | ||
1578 | void | |
1579 | md_number_to_chars (buf, val, n) | |
1580 | char *buf; | |
1581 | valueT val; | |
1582 | int n; | |
1583 | { | |
1584 | if (target_big_endian) | |
1585 | number_to_chars_bigendian (buf, val, n); | |
1586 | else | |
1587 | number_to_chars_littleendian (buf, val, n); | |
1588 | } | |
1589 | ||
bfb32b52 | 1590 | /* Round up a section size to the appropriate boundary. */ |
252b5132 RH |
1591 | |
1592 | valueT | |
1593 | md_section_align (segment, size) | |
1594 | segT segment; | |
1595 | valueT size; | |
1596 | { | |
1597 | int align = bfd_get_section_alignment (stdoutput, segment); | |
1598 | ||
1599 | return ((size + (1 << align) - 1) & (-1 << align)); | |
1600 | } | |
1601 | ||
1602 | /* We don't have any form of relaxing. */ | |
1603 | ||
1604 | int | |
1605 | md_estimate_size_before_relax (fragp, seg) | |
4a314ec8 NC |
1606 | fragS *fragp ATTRIBUTE_UNUSED; |
1607 | asection *seg ATTRIBUTE_UNUSED; | |
252b5132 | 1608 | { |
0d2bcfaf NC |
1609 | as_fatal (_("md_estimate_size_before_relax\n")); |
1610 | return 1; | |
252b5132 RH |
1611 | } |
1612 | ||
1613 | /* Convert a machine dependent frag. We never generate these. */ | |
1614 | ||
1615 | void | |
1616 | md_convert_frag (abfd, sec, fragp) | |
4a314ec8 NC |
1617 | bfd *abfd ATTRIBUTE_UNUSED; |
1618 | asection *sec ATTRIBUTE_UNUSED; | |
1619 | fragS *fragp ATTRIBUTE_UNUSED; | |
252b5132 | 1620 | { |
0d2bcfaf NC |
1621 | as_fatal (_("md_convert_frag\n")); |
1622 | } | |
1623 | ||
1624 | void | |
19203624 | 1625 | arc_code_symbol (expressionP) |
0d2bcfaf NC |
1626 | expressionS *expressionP; |
1627 | { | |
1628 | if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0 | |
1e07b820 KH |
1629 | /* I think this test is unnecessary but just as a sanity check... */ |
1630 | && expressionP->X_op_symbol == NULL) | |
0d2bcfaf | 1631 | { |
1e07b820 KH |
1632 | expressionS two; |
1633 | expressionP->X_op = O_right_shift; | |
1634 | two.X_op = O_constant; | |
1635 | two.X_add_symbol = two.X_op_symbol = NULL; | |
1636 | two.X_add_number = 2; | |
1637 | expressionP->X_op_symbol = make_expr_symbol (&two); | |
0d2bcfaf | 1638 | } |
19203624 KH |
1639 | /* Allow %st(sym1-sym2) */ |
1640 | else if (expressionP->X_op == O_subtract | |
1641 | && expressionP->X_add_symbol != NULL | |
1642 | && expressionP->X_op_symbol != NULL | |
1643 | && expressionP->X_add_number == 0) | |
0d2bcfaf | 1644 | { |
1e07b820 KH |
1645 | expressionS two; |
1646 | expressionP->X_add_symbol = make_expr_symbol (expressionP); | |
1647 | expressionP->X_op = O_right_shift; | |
1648 | two.X_op = O_constant; | |
1649 | two.X_add_symbol = two.X_op_symbol = NULL; | |
1650 | two.X_add_number = 2; | |
1651 | expressionP->X_op_symbol = make_expr_symbol (&two); | |
0d2bcfaf NC |
1652 | } |
1653 | else | |
1654 | { | |
1e07b820 KH |
1655 | as_bad ("expression too complex code symbol"); |
1656 | return; | |
0d2bcfaf | 1657 | } |
252b5132 RH |
1658 | } |
1659 | ||
1660 | /* Parse an operand that is machine-specific. | |
1661 | ||
1662 | The ARC has a special %-op to adjust addresses so they're usable in | |
1663 | branches. The "st" is short for the STatus register. | |
1664 | ??? Later expand this to take a flags value too. | |
1665 | ||
1666 | ??? We can't create new expression types so we map the %-op's onto the | |
1667 | existing syntax. This means that the user could use the chosen syntax | |
bfb32b52 | 1668 | to achieve the same effect. */ |
252b5132 | 1669 | |
bfb32b52 | 1670 | void |
252b5132 RH |
1671 | md_operand (expressionP) |
1672 | expressionS *expressionP; | |
1673 | { | |
1674 | char *p = input_line_pointer; | |
1675 | ||
0d2bcfaf | 1676 | if (*p == '%') |
19203624 | 1677 | if (strncmp (p, "%st(", 4) == 0) |
0d2bcfaf | 1678 | { |
1e07b820 KH |
1679 | input_line_pointer += 4; |
1680 | expression (expressionP); | |
1681 | if (*input_line_pointer != ')') | |
1682 | { | |
1683 | as_bad ("missing ')' in %%-op"); | |
1684 | return; | |
1685 | } | |
1686 | ++input_line_pointer; | |
19203624 | 1687 | arc_code_symbol (expressionP); |
0d2bcfaf | 1688 | } |
1e07b820 | 1689 | else |
19203624 KH |
1690 | { /* It could be a register. */ |
1691 | int i, l; | |
1e07b820 KH |
1692 | struct arc_ext_operand_value *ext_oper = arc_ext_operands; |
1693 | p++; | |
0d2bcfaf | 1694 | |
1e07b820 KH |
1695 | while (ext_oper) |
1696 | { | |
19203624 KH |
1697 | l = strlen (ext_oper->operand.name); |
1698 | if (!strncmp (p, ext_oper->operand.name, l) && !isalnum(*(p + l))) | |
1e07b820 KH |
1699 | { |
1700 | input_line_pointer += l + 1; | |
1701 | expressionP->X_op = O_register; | |
1702 | expressionP->X_add_number = (int) &ext_oper->operand; | |
1703 | return; | |
1704 | } | |
1705 | ext_oper = ext_oper->next; | |
1706 | } | |
1707 | for (i = 0; i < arc_reg_names_count; i++) | |
1708 | { | |
19203624 KH |
1709 | l = strlen (arc_reg_names[i].name); |
1710 | if (!strncmp (p, arc_reg_names[i].name, l) && !isalnum (*(p + l))) | |
1e07b820 KH |
1711 | { |
1712 | input_line_pointer += l + 1; | |
1713 | expressionP->X_op = O_register; | |
19203624 | 1714 | expressionP->X_add_number = (int) &arc_reg_names[i]; |
1e07b820 KH |
1715 | break; |
1716 | } | |
1717 | } | |
0d2bcfaf | 1718 | } |
252b5132 RH |
1719 | } |
1720 | ||
1721 | /* We have no need to default values of symbols. | |
1722 | We could catch register names here, but that is handled by inserting | |
1723 | them all in the symbol table to begin with. */ | |
1724 | ||
1725 | symbolS * | |
1726 | md_undefined_symbol (name) | |
4a314ec8 | 1727 | char *name ATTRIBUTE_UNUSED; |
252b5132 RH |
1728 | { |
1729 | return 0; | |
1730 | } | |
1731 | \f | |
1732 | /* Functions concerning expressions. */ | |
1733 | ||
1734 | /* Parse a .byte, .word, etc. expression. | |
1735 | ||
1736 | Values for the status register are specified with %st(label). | |
1737 | `label' will be right shifted by 2. */ | |
1738 | ||
1739 | void | |
1740 | arc_parse_cons_expression (exp, nbytes) | |
19203624 KH |
1741 | expressionS *exp; |
1742 | unsigned int nbytes ATTRIBUTE_UNUSED; | |
252b5132 | 1743 | { |
0d2bcfaf NC |
1744 | char *p = input_line_pointer; |
1745 | int code_symbol_fix = 0; | |
1746 | ||
19203624 KH |
1747 | for (; ! is_end_of_line[(unsigned char) *p]; p++) |
1748 | if (*p == '@' && !strncmp (p, "@h30", 4)) | |
0d2bcfaf | 1749 | { |
1e07b820 | 1750 | code_symbol_fix = 1; |
19203624 | 1751 | strcpy (p, "; "); |
0d2bcfaf | 1752 | } |
1e07b820 KH |
1753 | expr (0, exp); |
1754 | if (code_symbol_fix) | |
1755 | { | |
19203624 | 1756 | arc_code_symbol (exp); |
1e07b820 KH |
1757 | input_line_pointer = p; |
1758 | } | |
252b5132 RH |
1759 | } |
1760 | ||
1761 | /* Record a fixup for a cons expression. */ | |
1762 | ||
1763 | void | |
1764 | arc_cons_fix_new (frag, where, nbytes, exp) | |
1765 | fragS *frag; | |
1766 | int where; | |
1767 | int nbytes; | |
1768 | expressionS *exp; | |
1769 | { | |
1770 | if (nbytes == 4) | |
1771 | { | |
1772 | int reloc_type; | |
1773 | expressionS exptmp; | |
1774 | ||
1775 | /* This may be a special ARC reloc (eg: %st()). */ | |
1776 | reloc_type = get_arc_exp_reloc_type (1, BFD_RELOC_32, exp, &exptmp); | |
1777 | fix_new_exp (frag, where, nbytes, &exptmp, 0, reloc_type); | |
1778 | } | |
1779 | else | |
1780 | { | |
1781 | fix_new_exp (frag, where, nbytes, exp, 0, | |
1782 | nbytes == 2 ? BFD_RELOC_16 | |
1783 | : nbytes == 8 ? BFD_RELOC_64 | |
1784 | : BFD_RELOC_32); | |
1785 | } | |
1786 | } | |
1787 | \f | |
1788 | /* Functions concerning relocs. */ | |
1789 | ||
1790 | /* The location from which a PC relative jump should be calculated, | |
1791 | given a PC relative reloc. */ | |
1792 | ||
bfb32b52 | 1793 | long |
252b5132 RH |
1794 | md_pcrel_from (fixP) |
1795 | fixS *fixP; | |
1796 | { | |
1797 | if (fixP->fx_addsy != (symbolS *) NULL | |
1798 | && ! S_IS_DEFINED (fixP->fx_addsy)) | |
1799 | { | |
1800 | /* The symbol is undefined. Let the linker figure it out. */ | |
1801 | return 0; | |
1802 | } | |
1803 | ||
1804 | /* Return the address of the delay slot. */ | |
1805 | return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; | |
1806 | } | |
1807 | ||
1808 | /* Compute the reloc type of an expression. | |
1809 | The possibly modified expression is stored in EXPNEW. | |
1810 | ||
1811 | This is used to convert the expressions generated by the %-op's into | |
1812 | the appropriate operand type. It is called for both data in instructions | |
1813 | (operands) and data outside instructions (variables, debugging info, etc.). | |
1814 | ||
1815 | Currently supported %-ops: | |
1816 | ||
1817 | %st(symbol): represented as "symbol >> 2" | |
1818 | "st" is short for STatus as in the status register (pc) | |
1819 | ||
1820 | DEFAULT_TYPE is the type to use if no special processing is required. | |
1821 | ||
1822 | DATA_P is non-zero for data or limm values, zero for insn operands. | |
1823 | Remember that the opcode "insertion fns" cannot be used on data, they're | |
1824 | only for inserting operands into insns. They also can't be used for limm | |
1825 | values as the insertion routines don't handle limm values. When called for | |
1826 | insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When | |
1827 | called for data or limm values we use real reloc types. */ | |
1828 | ||
1829 | static int | |
1830 | get_arc_exp_reloc_type (data_p, default_type, exp, expnew) | |
1831 | int data_p; | |
1832 | int default_type; | |
1833 | expressionS *exp; | |
1834 | expressionS *expnew; | |
1835 | { | |
1836 | /* If the expression is "symbol >> 2" we must change it to just "symbol", | |
1837 | as fix_new_exp can't handle it. Similarily for (symbol - symbol) >> 2. | |
1838 | That's ok though. What's really going on here is that we're using | |
1839 | ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */ | |
1840 | ||
1841 | if (exp->X_op == O_right_shift | |
1842 | && exp->X_op_symbol != NULL | |
0d2bcfaf NC |
1843 | && exp->X_op_symbol->sy_value.X_op == O_constant |
1844 | && exp->X_op_symbol->sy_value.X_add_number == 2 | |
252b5132 RH |
1845 | && exp->X_add_number == 0) |
1846 | { | |
1847 | if (exp->X_add_symbol != NULL | |
0d2bcfaf NC |
1848 | && (exp->X_add_symbol->sy_value.X_op == O_constant |
1849 | || exp->X_add_symbol->sy_value.X_op == O_symbol)) | |
252b5132 RH |
1850 | { |
1851 | *expnew = *exp; | |
1852 | expnew->X_op = O_symbol; | |
1853 | expnew->X_op_symbol = NULL; | |
1854 | return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J']; | |
1855 | } | |
1856 | else if (exp->X_add_symbol != NULL | |
0d2bcfaf | 1857 | && exp->X_add_symbol->sy_value.X_op == O_subtract) |
252b5132 | 1858 | { |
0d2bcfaf | 1859 | *expnew = exp->X_add_symbol->sy_value; |
252b5132 RH |
1860 | return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J']; |
1861 | } | |
1862 | } | |
1863 | ||
1864 | *expnew = *exp; | |
1865 | return default_type; | |
1866 | } | |
1867 | ||
1868 | /* Apply a fixup to the object code. This is called for all the | |
1869 | fixups we generated by the call to fix_new_exp, above. In the call | |
1870 | above we used a reloc code which was the largest legal reloc code | |
1871 | plus the operand index. Here we undo that to recover the operand | |
1872 | index. At this point all symbol values should be fully resolved, | |
1873 | and we attempt to completely resolve the reloc. If we can not do | |
1874 | that, we determine the correct reloc code and put it back in the fixup. */ | |
1875 | ||
1876 | int | |
1877 | md_apply_fix3 (fixP, valueP, seg) | |
1878 | fixS *fixP; | |
1879 | valueT *valueP; | |
1880 | segT seg; | |
1881 | { | |
19203624 KH |
1882 | #if 0 |
1883 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
1884 | #endif | |
252b5132 RH |
1885 | valueT value; |
1886 | ||
1887 | /* FIXME FIXME FIXME: The value we are passed in *valueP includes | |
1888 | the symbol values. Since we are using BFD_ASSEMBLER, if we are | |
1889 | doing this relocation the code in write.c is going to call | |
1890 | bfd_perform_relocation, which is also going to use the symbol | |
1891 | value. That means that if the reloc is fully resolved we want to | |
1892 | use *valueP since bfd_perform_relocation is not being used. | |
1893 | However, if the reloc is not fully resolved we do not want to use | |
1894 | *valueP, and must use fx_offset instead. However, if the reloc | |
1895 | is PC relative, we do want to use *valueP since it includes the | |
1896 | result of md_pcrel_from. This is confusing. */ | |
1897 | ||
1898 | if (fixP->fx_addsy == (symbolS *) NULL) | |
1899 | { | |
1900 | value = *valueP; | |
1901 | fixP->fx_done = 1; | |
1902 | } | |
1903 | else if (fixP->fx_pcrel) | |
1904 | { | |
1905 | value = *valueP; | |
1906 | /* ELF relocations are against symbols. | |
1907 | If this symbol is in a different section then we need to leave it for | |
1908 | the linker to deal with. Unfortunately, md_pcrel_from can't tell, | |
1909 | so we have to undo it's effects here. */ | |
1910 | if (S_IS_DEFINED (fixP->fx_addsy) | |
1911 | && S_GET_SEGMENT (fixP->fx_addsy) != seg) | |
1912 | value += md_pcrel_from (fixP); | |
1913 | } | |
1914 | else | |
1915 | { | |
1916 | value = fixP->fx_offset; | |
1917 | if (fixP->fx_subsy != (symbolS *) NULL) | |
1918 | { | |
1919 | if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) | |
1920 | value -= S_GET_VALUE (fixP->fx_subsy); | |
1921 | else | |
1922 | { | |
1923 | /* We can't actually support subtracting a symbol. */ | |
1924 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0d2bcfaf | 1925 | "expression too complex"); |
252b5132 RH |
1926 | } |
1927 | } | |
1928 | } | |
1929 | ||
1930 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
1931 | { | |
1932 | int opindex; | |
1933 | const struct arc_operand *operand; | |
1934 | char *where; | |
1935 | arc_insn insn; | |
1936 | ||
1937 | opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
1938 | ||
1939 | operand = &arc_operands[opindex]; | |
1940 | ||
1941 | /* Fetch the instruction, insert the fully resolved operand | |
1942 | value, and stuff the instruction back again. */ | |
1943 | where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
1944 | if (target_big_endian) | |
1945 | insn = bfd_getb32 ((unsigned char *) where); | |
1946 | else | |
1947 | insn = bfd_getl32 ((unsigned char *) where); | |
1948 | insn = arc_insert_operand (insn, operand, -1, NULL, (offsetT) value, | |
1949 | fixP->fx_file, fixP->fx_line); | |
1950 | if (target_big_endian) | |
1951 | bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); | |
1952 | else | |
1953 | bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); | |
1954 | ||
1955 | if (fixP->fx_done) | |
1956 | { | |
1957 | /* Nothing else to do here. */ | |
1958 | return 1; | |
1959 | } | |
1960 | ||
1961 | /* Determine a BFD reloc value based on the operand information. | |
1962 | We are only prepared to turn a few of the operands into relocs. | |
1963 | !!! Note that we can't handle limm values here. Since we're using | |
1964 | implicit addends the addend must be inserted into the instruction, | |
1965 | however, the opcode insertion routines currently do nothing with | |
1966 | limm values. */ | |
1967 | if (operand->fmt == 'B') | |
1968 | { | |
1969 | assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0 | |
1970 | && operand->bits == 20 | |
1971 | && operand->shift == 7); | |
1972 | fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL; | |
1973 | } | |
0d2bcfaf | 1974 | else if (operand->fmt == 'J') |
252b5132 RH |
1975 | { |
1976 | assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0 | |
1977 | && operand->bits == 24 | |
1978 | && operand->shift == 32); | |
1979 | fixP->fx_r_type = BFD_RELOC_ARC_B26; | |
1980 | } | |
0d2bcfaf | 1981 | else if (operand->fmt == 'L') |
252b5132 RH |
1982 | { |
1983 | assert ((operand->flags & ARC_OPERAND_LIMM) != 0 | |
1984 | && operand->bits == 32 | |
1985 | && operand->shift == 32); | |
1986 | fixP->fx_r_type = BFD_RELOC_32; | |
1987 | } | |
1988 | else | |
1989 | { | |
1990 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0d2bcfaf | 1991 | "unresolved expression that must be resolved"); |
252b5132 RH |
1992 | fixP->fx_done = 1; |
1993 | return 1; | |
1994 | } | |
1995 | } | |
1996 | else | |
1997 | { | |
1998 | switch (fixP->fx_r_type) | |
1999 | { | |
2000 | case BFD_RELOC_8: | |
2001 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
2002 | value, 1); | |
2003 | break; | |
2004 | case BFD_RELOC_16: | |
2005 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
2006 | value, 2); | |
2007 | break; | |
2008 | case BFD_RELOC_32: | |
2009 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
2010 | value, 4); | |
2011 | break; | |
2012 | #if 0 | |
2013 | case BFD_RELOC_64: | |
2014 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
2015 | value, 8); | |
2016 | break; | |
2017 | #endif | |
2018 | case BFD_RELOC_ARC_B26: | |
2019 | /* If !fixP->fx_done then `value' is an implicit addend. | |
2020 | We must shift it right by 2 in this case as well because the | |
2021 | linker performs the relocation and then adds this in (as opposed | |
2022 | to adding this in and then shifting right by 2). */ | |
2023 | value >>= 2; | |
2024 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
2025 | value, 4); | |
2026 | break; | |
2027 | default: | |
2028 | abort (); | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | fixP->fx_addnumber = value; | |
2033 | ||
2034 | return 1; | |
2035 | } | |
2036 | ||
2037 | /* Translate internal representation of relocation info to BFD target | |
2038 | format. */ | |
2039 | ||
2040 | arelent * | |
2041 | tc_gen_reloc (section, fixP) | |
4a314ec8 | 2042 | asection *section ATTRIBUTE_UNUSED; |
252b5132 RH |
2043 | fixS *fixP; |
2044 | { | |
2045 | arelent *reloc; | |
2046 | ||
2047 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
2048 | ||
0d2bcfaf | 2049 | reloc->sym_ptr_ptr = &fixP->fx_addsy->bsym; |
252b5132 RH |
2050 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; |
2051 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
2052 | if (reloc->howto == (reloc_howto_type *) NULL) | |
2053 | { | |
2054 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0d2bcfaf | 2055 | "internal error: can't export reloc type %d (`%s')", |
19203624 KH |
2056 | fixP->fx_r_type, |
2057 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
252b5132 RH |
2058 | return NULL; |
2059 | } | |
2060 | ||
2061 | assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); | |
2062 | ||
19203624 KH |
2063 | /* Set addend to account for PC being advanced one insn before the |
2064 | target address is computed, drop fx_addnumber as it is handled | |
2065 | elsewhere mlm */ | |
252b5132 | 2066 | |
19203624 | 2067 | reloc->addend = (fixP->fx_pcrel ? -4 : 0); |
252b5132 | 2068 | |
0d2bcfaf | 2069 | return reloc; |
252b5132 | 2070 | } |