Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* tc-arc.c -- Assembler for the ARC |
52de4c06 NC |
2 | Copyright 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
3 | 2006 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 | 19 | along with GAS; see the file COPYING. If not, write to the Free |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "as.h" |
a161fe53 | 24 | #include "struc-symbol.h" |
3882b010 | 25 | #include "safe-ctype.h" |
252b5132 RH |
26 | #include "subsegs.h" |
27 | #include "opcode/arc.h" | |
0d2bcfaf | 28 | #include "../opcodes/arc-ext.h" |
252b5132 | 29 | #include "elf/arc.h" |
bcee8eb8 | 30 | #include "dwarf2dbg.h" |
252b5132 | 31 | |
ea1562b3 NC |
32 | const struct suffix_classes |
33 | { | |
0d2bcfaf NC |
34 | char *name; |
35 | int len; | |
ea1562b3 NC |
36 | } suffixclass[] = |
37 | { | |
0d2bcfaf NC |
38 | { "SUFFIX_COND|SUFFIX_FLAG",23 }, |
39 | { "SUFFIX_FLAG", 11 }, | |
40 | { "SUFFIX_COND", 11 }, | |
41 | { "SUFFIX_NONE", 11 } | |
42 | }; | |
43 | ||
bfb32b52 | 44 | #define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes)) |
0d2bcfaf | 45 | |
ea1562b3 NC |
46 | const struct syntax_classes |
47 | { | |
0d2bcfaf NC |
48 | char *name; |
49 | int len; | |
50 | int class; | |
ea1562b3 NC |
51 | } syntaxclass[] = |
52 | { | |
0d2bcfaf NC |
53 | { "SYNTAX_3OP|OP1_MUST_BE_IMM", 26, SYNTAX_3OP|OP1_MUST_BE_IMM|SYNTAX_VALID }, |
54 | { "OP1_MUST_BE_IMM|SYNTAX_3OP", 26, OP1_MUST_BE_IMM|SYNTAX_3OP|SYNTAX_VALID }, | |
55 | { "SYNTAX_2OP|OP1_IMM_IMPLIED", 26, SYNTAX_2OP|OP1_IMM_IMPLIED|SYNTAX_VALID }, | |
56 | { "OP1_IMM_IMPLIED|SYNTAX_2OP", 26, OP1_IMM_IMPLIED|SYNTAX_2OP|SYNTAX_VALID }, | |
57 | { "SYNTAX_3OP", 10, SYNTAX_3OP|SYNTAX_VALID }, | |
58 | { "SYNTAX_2OP", 10, SYNTAX_2OP|SYNTAX_VALID } | |
59 | }; | |
60 | ||
bfb32b52 | 61 | #define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes)) |
0d2bcfaf | 62 | |
252b5132 | 63 | /* This array holds the chars that always start a comment. If the |
bcee8eb8 | 64 | pre-processor is disabled, these aren't very useful. */ |
252b5132 RH |
65 | const char comment_chars[] = "#;"; |
66 | ||
67 | /* This array holds the chars that only start a comment at the beginning of | |
68 | a line. If the line seems to have the form '# 123 filename' | |
69 | .line and .file directives will appear in the pre-processed output */ | |
70 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
71 | first line of the input file. This is because the compiler outputs | |
bfb32b52 | 72 | #NO_APP at the beginning of its output. */ |
252b5132 | 73 | /* Also note that comments started like this one will always |
bfb32b52 | 74 | work if '/' isn't otherwise defined. */ |
252b5132 RH |
75 | const char line_comment_chars[] = "#"; |
76 | ||
77 | const char line_separator_chars[] = ""; | |
78 | ||
bcee8eb8 | 79 | /* Chars that can be used to separate mant from exp in floating point nums. */ |
252b5132 RH |
80 | const char EXP_CHARS[] = "eE"; |
81 | ||
bcee8eb8 AM |
82 | /* Chars that mean this number is a floating point constant |
83 | As in 0f12.456 or 0d1.2345e12. */ | |
252b5132 RH |
84 | const char FLT_CHARS[] = "rRsSfFdD"; |
85 | ||
86 | /* Byte order. */ | |
87 | extern int target_big_endian; | |
88 | const char *arc_target_format = DEFAULT_TARGET_FORMAT; | |
89 | static int byte_order = DEFAULT_BYTE_ORDER; | |
90 | ||
0d2bcfaf NC |
91 | static segT arcext_section; |
92 | ||
93 | /* One of bfd_mach_arc_n. */ | |
bcee8eb8 | 94 | static int arc_mach_type = bfd_mach_arc_6; |
252b5132 RH |
95 | |
96 | /* Non-zero if the cpu type has been explicitly specified. */ | |
97 | static int mach_type_specified_p = 0; | |
98 | ||
99 | /* Non-zero if opcode tables have been initialized. | |
bcee8eb8 | 100 | A .option command must appear before any instructions. */ |
252b5132 RH |
101 | static int cpu_tables_init_p = 0; |
102 | ||
103 | static struct hash_control *arc_suffix_hash = NULL; | |
104 | \f | |
105 | const char *md_shortopts = ""; | |
ea1562b3 NC |
106 | |
107 | enum options | |
108 | { | |
109 | OPTION_EB = OPTION_MD_BASE, | |
110 | OPTION_EL, | |
111 | OPTION_ARC5, | |
112 | OPTION_ARC6, | |
113 | OPTION_ARC7, | |
114 | OPTION_ARC8, | |
115 | OPTION_ARC | |
116 | }; | |
117 | ||
118 | struct option md_longopts[] = | |
119 | { | |
bcee8eb8 | 120 | { "EB", no_argument, NULL, OPTION_EB }, |
bcee8eb8 | 121 | { "EL", no_argument, NULL, OPTION_EL }, |
bcee8eb8 AM |
122 | { "marc5", no_argument, NULL, OPTION_ARC5 }, |
123 | { "pre-v6", no_argument, NULL, OPTION_ARC5 }, | |
bcee8eb8 | 124 | { "marc6", no_argument, NULL, OPTION_ARC6 }, |
bcee8eb8 | 125 | { "marc7", no_argument, NULL, OPTION_ARC7 }, |
bcee8eb8 | 126 | { "marc8", no_argument, NULL, OPTION_ARC8 }, |
bcee8eb8 | 127 | { "marc", no_argument, NULL, OPTION_ARC }, |
252b5132 RH |
128 | { NULL, no_argument, NULL, 0 } |
129 | }; | |
130 | size_t md_longopts_size = sizeof (md_longopts); | |
131 | ||
0d2bcfaf NC |
132 | #define IS_SYMBOL_OPERAND(o) \ |
133 | ((o) == 'b' || (o) == 'c' || (o) == 's' || (o) == 'o' || (o) == 'O') | |
134 | ||
19203624 | 135 | struct arc_operand_value *get_ext_suffix (char *s); |
0d2bcfaf | 136 | |
19203624 KH |
137 | /* Invocation line includes a switch not recognized by the base assembler. |
138 | See if it's a processor-specific option. */ | |
252b5132 RH |
139 | |
140 | int | |
ea1562b3 | 141 | md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) |
252b5132 RH |
142 | { |
143 | switch (c) | |
1e07b820 | 144 | { |
0d2bcfaf NC |
145 | case OPTION_ARC5: |
146 | arc_mach_type = bfd_mach_arc_5; | |
147 | break; | |
bcee8eb8 | 148 | case OPTION_ARC: |
0d2bcfaf NC |
149 | case OPTION_ARC6: |
150 | arc_mach_type = bfd_mach_arc_6; | |
151 | break; | |
152 | case OPTION_ARC7: | |
153 | arc_mach_type = bfd_mach_arc_7; | |
154 | break; | |
155 | case OPTION_ARC8: | |
156 | arc_mach_type = bfd_mach_arc_8; | |
157 | break; | |
252b5132 RH |
158 | case OPTION_EB: |
159 | byte_order = BIG_ENDIAN; | |
160 | arc_target_format = "elf32-bigarc"; | |
161 | break; | |
162 | case OPTION_EL: | |
163 | byte_order = LITTLE_ENDIAN; | |
164 | arc_target_format = "elf32-littlearc"; | |
165 | break; | |
166 | default: | |
167 | return 0; | |
1e07b820 | 168 | } |
252b5132 RH |
169 | return 1; |
170 | } | |
171 | ||
172 | void | |
ea1562b3 | 173 | md_show_usage (FILE *stream) |
252b5132 | 174 | { |
0d2bcfaf NC |
175 | fprintf (stream, "\ |
176 | ARC Options:\n\ | |
177 | -marc[5|6|7|8] select processor variant (default arc%d)\n\ | |
178 | -EB assemble code for a big endian cpu\n\ | |
179 | -EL assemble code for a little endian cpu\n", arc_mach_type + 5); | |
252b5132 RH |
180 | } |
181 | ||
182 | /* This function is called once, at assembler startup time. It should | |
183 | set up all the tables, etc. that the MD part of the assembler will need. | |
bcee8eb8 | 184 | Opcode selection is deferred until later because we might see a .option |
252b5132 RH |
185 | command. */ |
186 | ||
187 | void | |
ea1562b3 | 188 | md_begin (void) |
252b5132 RH |
189 | { |
190 | /* The endianness can be chosen "at the factory". */ | |
191 | target_big_endian = byte_order == BIG_ENDIAN; | |
192 | ||
193 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type)) | |
0d2bcfaf | 194 | as_warn ("could not set architecture and machine"); |
252b5132 | 195 | |
bcee8eb8 AM |
196 | /* This call is necessary because we need to initialize `arc_operand_map' |
197 | which may be needed before we see the first insn. */ | |
0d2bcfaf | 198 | arc_opcode_init_tables (arc_get_opcode_mach (arc_mach_type, |
252b5132 RH |
199 | target_big_endian)); |
200 | } | |
201 | ||
202 | /* Initialize the various opcode and operand tables. | |
203 | MACH is one of bfd_mach_arc_xxx. */ | |
ea1562b3 | 204 | |
252b5132 | 205 | static void |
ea1562b3 | 206 | init_opcode_tables (int mach) |
252b5132 | 207 | { |
4a314ec8 | 208 | int i; |
252b5132 RH |
209 | char *last; |
210 | ||
211 | if ((arc_suffix_hash = hash_new ()) == NULL) | |
0d2bcfaf | 212 | as_fatal ("virtual memory exhausted"); |
252b5132 RH |
213 | |
214 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) | |
0d2bcfaf | 215 | as_warn ("could not set architecture and machine"); |
252b5132 RH |
216 | |
217 | /* This initializes a few things in arc-opc.c that we need. | |
218 | This must be called before the various arc_xxx_supported fns. */ | |
219 | arc_opcode_init_tables (arc_get_opcode_mach (mach, target_big_endian)); | |
220 | ||
221 | /* Only put the first entry of each equivalently named suffix in the | |
222 | table. */ | |
223 | last = ""; | |
224 | for (i = 0; i < arc_suffixes_count; i++) | |
225 | { | |
252b5132 | 226 | if (strcmp (arc_suffixes[i].name, last) != 0) |
ea1562b3 | 227 | hash_insert (arc_suffix_hash, arc_suffixes[i].name, (void *) (arc_suffixes + i)); |
252b5132 RH |
228 | last = arc_suffixes[i].name; |
229 | } | |
230 | ||
231 | /* Since registers don't have a prefix, we put them in the symbol table so | |
232 | they can't be used as symbols. This also simplifies argument parsing as | |
233 | we can let gas parse registers for us. The recorded register number is | |
0d2bcfaf NC |
234 | the address of the register's entry in arc_reg_names. |
235 | ||
236 | If the register name is already in the table, then the existing | |
237 | definition is assumed to be from an .ExtCoreRegister pseudo-op. */ | |
238 | ||
252b5132 RH |
239 | for (i = 0; i < arc_reg_names_count; i++) |
240 | { | |
19203624 | 241 | if (symbol_find (arc_reg_names[i].name)) |
252b5132 RH |
242 | continue; |
243 | /* Use symbol_create here instead of symbol_new so we don't try to | |
244 | output registers into the object file's symbol table. */ | |
bcee8eb8 AM |
245 | symbol_table_insert (symbol_create (arc_reg_names[i].name, |
246 | reg_section, | |
52de4c06 | 247 | (valueT) &arc_reg_names[i], |
bcee8eb8 | 248 | &zero_address_frag)); |
252b5132 RH |
249 | } |
250 | ||
0d2bcfaf | 251 | /* Tell `.option' it's too late. */ |
252b5132 RH |
252 | cpu_tables_init_p = 1; |
253 | } | |
254 | \f | |
255 | /* Insert an operand value into an instruction. | |
256 | If REG is non-NULL, it is a register number and ignore VAL. */ | |
257 | ||
258 | static arc_insn | |
ea1562b3 NC |
259 | arc_insert_operand (arc_insn insn, |
260 | const struct arc_operand *operand, | |
261 | int mods, | |
262 | const struct arc_operand_value *reg, | |
263 | offsetT val, | |
264 | char *file, | |
265 | unsigned int line) | |
252b5132 RH |
266 | { |
267 | if (operand->bits != 32) | |
268 | { | |
269 | long min, max; | |
270 | offsetT test; | |
271 | ||
272 | if ((operand->flags & ARC_OPERAND_SIGNED) != 0) | |
273 | { | |
274 | if ((operand->flags & ARC_OPERAND_SIGNOPT) != 0) | |
275 | max = (1 << operand->bits) - 1; | |
276 | else | |
277 | max = (1 << (operand->bits - 1)) - 1; | |
278 | min = - (1 << (operand->bits - 1)); | |
279 | } | |
280 | else | |
281 | { | |
282 | max = (1 << operand->bits) - 1; | |
283 | min = 0; | |
284 | } | |
285 | ||
286 | if ((operand->flags & ARC_OPERAND_NEGATIVE) != 0) | |
287 | test = - val; | |
288 | else | |
289 | test = val; | |
290 | ||
291 | if (test < (offsetT) min || test > (offsetT) max) | |
e5976317 | 292 | as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line); |
252b5132 RH |
293 | } |
294 | ||
295 | if (operand->insert) | |
296 | { | |
297 | const char *errmsg; | |
298 | ||
299 | errmsg = NULL; | |
300 | insn = (*operand->insert) (insn, operand, mods, reg, (long) val, &errmsg); | |
301 | if (errmsg != (const char *) NULL) | |
302 | as_warn (errmsg); | |
303 | } | |
304 | else | |
305 | insn |= (((long) val & ((1 << operand->bits) - 1)) | |
306 | << operand->shift); | |
307 | ||
308 | return insn; | |
309 | } | |
310 | ||
311 | /* We need to keep a list of fixups. We can't simply generate them as | |
312 | we go, because that would require us to first create the frag, and | |
313 | that would screw up references to ``.''. */ | |
314 | ||
ea1562b3 NC |
315 | struct arc_fixup |
316 | { | |
bcee8eb8 | 317 | /* index into `arc_operands' */ |
252b5132 RH |
318 | int opindex; |
319 | expressionS exp; | |
320 | }; | |
321 | ||
322 | #define MAX_FIXUPS 5 | |
323 | ||
324 | #define MAX_SUFFIXES 5 | |
325 | ||
ea1562b3 NC |
326 | /* Compute the reloc type of an expression. |
327 | The possibly modified expression is stored in EXPNEW. | |
252b5132 | 328 | |
ea1562b3 NC |
329 | This is used to convert the expressions generated by the %-op's into |
330 | the appropriate operand type. It is called for both data in instructions | |
331 | (operands) and data outside instructions (variables, debugging info, etc.). | |
332 | ||
333 | Currently supported %-ops: | |
334 | ||
335 | %st(symbol): represented as "symbol >> 2" | |
336 | "st" is short for STatus as in the status register (pc) | |
337 | ||
338 | DEFAULT_TYPE is the type to use if no special processing is required. | |
339 | ||
340 | DATA_P is non-zero for data or limm values, zero for insn operands. | |
341 | Remember that the opcode "insertion fns" cannot be used on data, they're | |
342 | only for inserting operands into insns. They also can't be used for limm | |
343 | values as the insertion routines don't handle limm values. When called for | |
344 | insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When | |
345 | called for data or limm values we use real reloc types. */ | |
346 | ||
347 | static int | |
348 | get_arc_exp_reloc_type (int data_p, | |
349 | int default_type, | |
350 | expressionS *exp, | |
351 | expressionS *expnew) | |
252b5132 | 352 | { |
ea1562b3 NC |
353 | /* If the expression is "symbol >> 2" we must change it to just "symbol", |
354 | as fix_new_exp can't handle it. Similarly for (symbol - symbol) >> 2. | |
355 | That's ok though. What's really going on here is that we're using | |
356 | ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */ | |
252b5132 | 357 | |
ea1562b3 NC |
358 | if (exp->X_op == O_right_shift |
359 | && exp->X_op_symbol != NULL | |
360 | && exp->X_op_symbol->sy_value.X_op == O_constant | |
361 | && exp->X_op_symbol->sy_value.X_add_number == 2 | |
362 | && exp->X_add_number == 0) | |
252b5132 | 363 | { |
ea1562b3 NC |
364 | if (exp->X_add_symbol != NULL |
365 | && (exp->X_add_symbol->sy_value.X_op == O_constant | |
366 | || exp->X_add_symbol->sy_value.X_op == O_symbol)) | |
367 | { | |
368 | *expnew = *exp; | |
369 | expnew->X_op = O_symbol; | |
370 | expnew->X_op_symbol = NULL; | |
371 | return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J']; | |
372 | } | |
373 | else if (exp->X_add_symbol != NULL | |
374 | && exp->X_add_symbol->sy_value.X_op == O_subtract) | |
375 | { | |
376 | *expnew = exp->X_add_symbol->sy_value; | |
377 | return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J']; | |
378 | } | |
252b5132 RH |
379 | } |
380 | ||
ea1562b3 NC |
381 | *expnew = *exp; |
382 | return default_type; | |
383 | } | |
384 | \f | |
385 | static int | |
386 | arc_set_ext_seg (void) | |
387 | { | |
388 | if (!arcext_section) | |
389 | { | |
390 | arcext_section = subseg_new (".arcextmap", 0); | |
391 | bfd_set_section_flags (stdoutput, arcext_section, | |
392 | SEC_READONLY | SEC_HAS_CONTENTS); | |
393 | } | |
394 | else | |
395 | subseg_set (arcext_section, 0); | |
396 | return 1; | |
397 | } | |
252b5132 | 398 | |
ea1562b3 NC |
399 | static void |
400 | arc_extoper (int opertype) | |
401 | { | |
402 | char *name; | |
403 | char *mode; | |
404 | char c; | |
405 | char *p; | |
406 | int imode = 0; | |
407 | int number; | |
408 | struct arc_ext_operand_value *ext_oper; | |
409 | symbolS *symbolP; | |
252b5132 | 410 | |
ea1562b3 NC |
411 | segT old_sec; |
412 | int old_subsec; | |
252b5132 | 413 | |
ea1562b3 NC |
414 | name = input_line_pointer; |
415 | c = get_symbol_end (); | |
416 | name = xstrdup (name); | |
252b5132 | 417 | |
ea1562b3 NC |
418 | p = name; |
419 | while (*p) | |
252b5132 | 420 | { |
ea1562b3 NC |
421 | *p = TOLOWER (*p); |
422 | p++; | |
423 | } | |
252b5132 | 424 | |
ea1562b3 NC |
425 | /* just after name is now '\0' */ |
426 | p = input_line_pointer; | |
427 | *p = c; | |
428 | SKIP_WHITESPACE (); | |
252b5132 | 429 | |
ea1562b3 NC |
430 | if (*input_line_pointer != ',') |
431 | { | |
432 | as_bad ("expected comma after operand name"); | |
433 | ignore_rest_of_line (); | |
434 | free (name); | |
435 | return; | |
436 | } | |
252b5132 | 437 | |
ea1562b3 NC |
438 | input_line_pointer++; /* skip ',' */ |
439 | number = get_absolute_expression (); | |
252b5132 | 440 | |
ea1562b3 NC |
441 | if (number < 0) |
442 | { | |
443 | as_bad ("negative operand number %d", number); | |
444 | ignore_rest_of_line (); | |
445 | free (name); | |
446 | return; | |
447 | } | |
448 | ||
449 | if (opertype) | |
450 | { | |
451 | SKIP_WHITESPACE (); | |
452 | ||
453 | if (*input_line_pointer != ',') | |
252b5132 | 454 | { |
ea1562b3 NC |
455 | as_bad ("expected comma after register-number"); |
456 | ignore_rest_of_line (); | |
457 | free (name); | |
458 | return; | |
459 | } | |
252b5132 | 460 | |
ea1562b3 NC |
461 | input_line_pointer++; /* skip ',' */ |
462 | mode = input_line_pointer; | |
463 | ||
464 | if (!strncmp (mode, "r|w", 3)) | |
465 | { | |
466 | imode = 0; | |
467 | input_line_pointer += 3; | |
468 | } | |
469 | else | |
470 | { | |
471 | if (!strncmp (mode, "r", 1)) | |
252b5132 | 472 | { |
ea1562b3 NC |
473 | imode = ARC_REGISTER_READONLY; |
474 | input_line_pointer += 1; | |
475 | } | |
476 | else | |
477 | { | |
478 | if (strncmp (mode, "w", 1)) | |
252b5132 | 479 | { |
ea1562b3 NC |
480 | as_bad ("invalid mode"); |
481 | ignore_rest_of_line (); | |
482 | free (name); | |
483 | return; | |
252b5132 RH |
484 | } |
485 | else | |
ea1562b3 NC |
486 | { |
487 | imode = ARC_REGISTER_WRITEONLY; | |
488 | input_line_pointer += 1; | |
489 | } | |
252b5132 | 490 | } |
ea1562b3 NC |
491 | } |
492 | SKIP_WHITESPACE (); | |
493 | if (1 == opertype) | |
494 | { | |
495 | if (*input_line_pointer != ',') | |
252b5132 | 496 | { |
ea1562b3 NC |
497 | as_bad ("expected comma after register-mode"); |
498 | ignore_rest_of_line (); | |
499 | free (name); | |
500 | return; | |
252b5132 | 501 | } |
252b5132 | 502 | |
ea1562b3 NC |
503 | input_line_pointer++; /* skip ',' */ |
504 | ||
505 | if (!strncmp (input_line_pointer, "cannot_shortcut", 15)) | |
252b5132 | 506 | { |
ea1562b3 NC |
507 | imode |= arc_get_noshortcut_flag (); |
508 | input_line_pointer += 15; | |
252b5132 | 509 | } |
ea1562b3 | 510 | else |
252b5132 | 511 | { |
ea1562b3 | 512 | if (strncmp (input_line_pointer, "can_shortcut", 12)) |
252b5132 | 513 | { |
ea1562b3 NC |
514 | as_bad ("shortcut designator invalid"); |
515 | ignore_rest_of_line (); | |
516 | free (name); | |
517 | return; | |
252b5132 RH |
518 | } |
519 | else | |
520 | { | |
ea1562b3 | 521 | input_line_pointer += 12; |
252b5132 | 522 | } |
ea1562b3 NC |
523 | } |
524 | } | |
525 | } | |
252b5132 | 526 | |
ea1562b3 NC |
527 | if ((opertype == 1) && number > 60) |
528 | { | |
529 | as_bad ("core register value (%d) too large", number); | |
530 | ignore_rest_of_line (); | |
531 | free (name); | |
532 | return; | |
533 | } | |
252b5132 | 534 | |
ea1562b3 NC |
535 | if ((opertype == 0) && number > 31) |
536 | { | |
537 | as_bad ("condition code value (%d) too large", number); | |
538 | ignore_rest_of_line (); | |
539 | free (name); | |
540 | return; | |
541 | } | |
1e07b820 | 542 | |
ea1562b3 NC |
543 | ext_oper = xmalloc (sizeof (struct arc_ext_operand_value)); |
544 | ||
545 | if (opertype) | |
546 | { | |
547 | /* If the symbol already exists, point it at the new definition. */ | |
548 | if ((symbolP = symbol_find (name))) | |
549 | { | |
550 | if (S_GET_SEGMENT (symbolP) == reg_section) | |
52de4c06 | 551 | S_SET_VALUE (symbolP, (valueT) &ext_oper->operand); |
252b5132 | 552 | else |
252b5132 | 553 | { |
ea1562b3 NC |
554 | as_bad ("attempt to override symbol: %s", name); |
555 | ignore_rest_of_line (); | |
556 | free (name); | |
557 | free (ext_oper); | |
558 | return; | |
559 | } | |
560 | } | |
561 | else | |
562 | { | |
563 | /* If its not there, add it. */ | |
564 | symbol_table_insert (symbol_create (name, reg_section, | |
52de4c06 NC |
565 | (valueT) &ext_oper->operand, |
566 | &zero_address_frag)); | |
ea1562b3 NC |
567 | } |
568 | } | |
252b5132 | 569 | |
ea1562b3 NC |
570 | ext_oper->operand.name = name; |
571 | ext_oper->operand.value = number; | |
572 | ext_oper->operand.type = arc_operand_type (opertype); | |
573 | ext_oper->operand.flags = imode; | |
252b5132 | 574 | |
ea1562b3 NC |
575 | ext_oper->next = arc_ext_operands; |
576 | arc_ext_operands = ext_oper; | |
252b5132 | 577 | |
ea1562b3 NC |
578 | /* OK, now that we know what this operand is, put a description in |
579 | the arc extension section of the output file. */ | |
252b5132 | 580 | |
ea1562b3 NC |
581 | old_sec = now_seg; |
582 | old_subsec = now_subseg; | |
252b5132 | 583 | |
ea1562b3 | 584 | arc_set_ext_seg (); |
252b5132 | 585 | |
ea1562b3 NC |
586 | switch (opertype) |
587 | { | |
588 | case 0: | |
589 | p = frag_more (1); | |
590 | *p = 3 + strlen (name) + 1; | |
591 | p = frag_more (1); | |
592 | *p = EXT_COND_CODE; | |
593 | p = frag_more (1); | |
594 | *p = number; | |
595 | p = frag_more (strlen (name) + 1); | |
596 | strcpy (p, name); | |
597 | break; | |
598 | case 1: | |
599 | p = frag_more (1); | |
600 | *p = 3 + strlen (name) + 1; | |
601 | p = frag_more (1); | |
602 | *p = EXT_CORE_REGISTER; | |
603 | p = frag_more (1); | |
604 | *p = number; | |
605 | p = frag_more (strlen (name) + 1); | |
606 | strcpy (p, name); | |
607 | break; | |
608 | case 2: | |
609 | p = frag_more (1); | |
610 | *p = 6 + strlen (name) + 1; | |
611 | p = frag_more (1); | |
612 | *p = EXT_AUX_REGISTER; | |
613 | p = frag_more (1); | |
614 | *p = number >> 24 & 0xff; | |
615 | p = frag_more (1); | |
616 | *p = number >> 16 & 0xff; | |
617 | p = frag_more (1); | |
618 | *p = number >> 8 & 0xff; | |
619 | p = frag_more (1); | |
620 | *p = number & 0xff; | |
621 | p = frag_more (strlen (name) + 1); | |
622 | strcpy (p, name); | |
623 | break; | |
624 | default: | |
625 | as_bad ("invalid opertype"); | |
626 | ignore_rest_of_line (); | |
627 | free (name); | |
628 | return; | |
629 | break; | |
630 | } | |
252b5132 | 631 | |
ea1562b3 | 632 | subseg_set (old_sec, old_subsec); |
252b5132 | 633 | |
ea1562b3 | 634 | /* Enter all registers into the symbol table. */ |
252b5132 | 635 | |
ea1562b3 | 636 | demand_empty_rest_of_line (); |
252b5132 | 637 | } |
ea1562b3 | 638 | |
252b5132 | 639 | static void |
ea1562b3 | 640 | arc_extinst (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 641 | { |
ea1562b3 | 642 | char syntax[129]; |
252b5132 | 643 | char *name; |
252b5132 | 644 | char *p; |
ea1562b3 NC |
645 | char c; |
646 | int suffixcode = -1; | |
647 | int opcode, subopcode; | |
648 | int i; | |
649 | int class = 0; | |
650 | int name_len; | |
651 | struct arc_opcode *ext_op; | |
252b5132 | 652 | |
0d2bcfaf NC |
653 | segT old_sec; |
654 | int old_subsec; | |
655 | ||
252b5132 RH |
656 | name = input_line_pointer; |
657 | c = get_symbol_end (); | |
19203624 | 658 | name = xstrdup (name); |
ea1562b3 NC |
659 | strcpy (syntax, name); |
660 | name_len = strlen (name); | |
0d2bcfaf | 661 | |
bcee8eb8 | 662 | /* just after name is now '\0' */ |
252b5132 RH |
663 | p = input_line_pointer; |
664 | *p = c; | |
ea1562b3 | 665 | |
252b5132 | 666 | SKIP_WHITESPACE (); |
0d2bcfaf | 667 | |
252b5132 RH |
668 | if (*input_line_pointer != ',') |
669 | { | |
0d2bcfaf | 670 | as_bad ("expected comma after operand name"); |
252b5132 RH |
671 | ignore_rest_of_line (); |
672 | return; | |
673 | } | |
0d2bcfaf | 674 | |
bcee8eb8 | 675 | input_line_pointer++; /* skip ',' */ |
ea1562b3 | 676 | opcode = get_absolute_expression (); |
0d2bcfaf NC |
677 | |
678 | SKIP_WHITESPACE (); | |
679 | ||
680 | if (*input_line_pointer != ',') | |
252b5132 | 681 | { |
0d2bcfaf | 682 | as_bad ("expected comma after opcode"); |
252b5132 RH |
683 | ignore_rest_of_line (); |
684 | return; | |
685 | } | |
0d2bcfaf | 686 | |
bcee8eb8 | 687 | input_line_pointer++; /* skip ',' */ |
0d2bcfaf NC |
688 | subopcode = get_absolute_expression (); |
689 | ||
19203624 | 690 | if (subopcode < 0) |
252b5132 | 691 | { |
19203624 KH |
692 | as_bad ("negative subopcode %d", subopcode); |
693 | ignore_rest_of_line (); | |
1e07b820 | 694 | return; |
252b5132 | 695 | } |
0d2bcfaf | 696 | |
19203624 | 697 | if (subopcode) |
0d2bcfaf | 698 | { |
19203624 | 699 | if (3 != opcode) |
1e07b820 KH |
700 | { |
701 | as_bad ("subcode value found when opcode not equal 0x03"); | |
19203624 | 702 | ignore_rest_of_line (); |
1e07b820 KH |
703 | return; |
704 | } | |
705 | else | |
706 | { | |
707 | if (subopcode < 0x09 || subopcode == 0x3f) | |
708 | { | |
709 | as_bad ("invalid subopcode %d", subopcode); | |
19203624 | 710 | ignore_rest_of_line (); |
1e07b820 KH |
711 | return; |
712 | } | |
713 | } | |
0d2bcfaf NC |
714 | } |
715 | ||
716 | SKIP_WHITESPACE (); | |
717 | ||
252b5132 RH |
718 | if (*input_line_pointer != ',') |
719 | { | |
0d2bcfaf | 720 | as_bad ("expected comma after subopcode"); |
252b5132 RH |
721 | ignore_rest_of_line (); |
722 | return; | |
723 | } | |
0d2bcfaf | 724 | |
bcee8eb8 | 725 | input_line_pointer++; /* skip ',' */ |
0d2bcfaf | 726 | |
19203624 | 727 | for (i = 0; i < (int) MAXSUFFIXCLASS; i++) |
0d2bcfaf | 728 | { |
19203624 | 729 | if (!strncmp (suffixclass[i].name,input_line_pointer, suffixclass[i].len)) |
1e07b820 KH |
730 | { |
731 | suffixcode = i; | |
732 | input_line_pointer += suffixclass[i].len; | |
733 | break; | |
734 | } | |
0d2bcfaf NC |
735 | } |
736 | ||
19203624 | 737 | if (-1 == suffixcode) |
0d2bcfaf NC |
738 | { |
739 | as_bad ("invalid suffix class"); | |
740 | ignore_rest_of_line (); | |
741 | return; | |
742 | } | |
743 | ||
252b5132 | 744 | SKIP_WHITESPACE (); |
0d2bcfaf NC |
745 | |
746 | if (*input_line_pointer != ',') | |
252b5132 | 747 | { |
0d2bcfaf NC |
748 | as_bad ("expected comma after suffix class"); |
749 | ignore_rest_of_line (); | |
750 | return; | |
252b5132 | 751 | } |
0d2bcfaf | 752 | |
bcee8eb8 | 753 | input_line_pointer++; /* skip ',' */ |
0d2bcfaf | 754 | |
19203624 | 755 | for (i = 0; i < (int) MAXSYNTAXCLASS; i++) |
252b5132 | 756 | { |
19203624 | 757 | if (!strncmp (syntaxclass[i].name,input_line_pointer, syntaxclass[i].len)) |
1e07b820 KH |
758 | { |
759 | class = syntaxclass[i].class; | |
760 | input_line_pointer += syntaxclass[i].len; | |
761 | break; | |
762 | } | |
252b5132 | 763 | } |
252b5132 | 764 | |
19203624 | 765 | if (0 == (SYNTAX_VALID & class)) |
0d2bcfaf NC |
766 | { |
767 | as_bad ("invalid syntax class"); | |
768 | ignore_rest_of_line (); | |
769 | return; | |
770 | } | |
771 | ||
19203624 | 772 | if ((0x3 == opcode) & (class & SYNTAX_3OP)) |
0d2bcfaf NC |
773 | { |
774 | as_bad ("opcode 0x3 and SYNTAX_3OP invalid"); | |
775 | ignore_rest_of_line (); | |
776 | return; | |
777 | } | |
778 | ||
779 | switch (suffixcode) | |
1e07b820 KH |
780 | { |
781 | case 0: | |
19203624 | 782 | strcat (syntax, "%.q%.f "); |
1e07b820 KH |
783 | break; |
784 | case 1: | |
19203624 | 785 | strcat (syntax, "%.f "); |
1e07b820 KH |
786 | break; |
787 | case 2: | |
19203624 | 788 | strcat (syntax, "%.q "); |
1e07b820 KH |
789 | break; |
790 | case 3: | |
19203624 | 791 | strcat (syntax, " "); |
1e07b820 KH |
792 | break; |
793 | default: | |
19203624 KH |
794 | as_bad ("unknown suffix class"); |
795 | ignore_rest_of_line (); | |
1e07b820 KH |
796 | return; |
797 | break; | |
798 | }; | |
0d2bcfaf | 799 | |
19203624 KH |
800 | strcat (syntax, ((opcode == 0x3) ? "%a,%b" : ((class & SYNTAX_3OP) ? "%a,%b,%c" : "%b,%c"))); |
801 | if (suffixcode < 2) | |
802 | strcat (syntax, "%F"); | |
803 | strcat (syntax, "%S%L"); | |
0d2bcfaf | 804 | |
ea1562b3 | 805 | ext_op = xmalloc (sizeof (struct arc_opcode)); |
19203624 | 806 | ext_op->syntax = xstrdup (syntax); |
0d2bcfaf | 807 | |
19203624 KH |
808 | ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0); |
809 | ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0); | |
0d2bcfaf NC |
810 | ext_op->flags = class; |
811 | ext_op->next_asm = arc_ext_opcodes; | |
812 | ext_op->next_dis = arc_ext_opcodes; | |
813 | arc_ext_opcodes = ext_op; | |
814 | ||
19203624 KH |
815 | /* OK, now that we know what this inst is, put a description in the |
816 | arc extension section of the output file. */ | |
0d2bcfaf NC |
817 | |
818 | old_sec = now_seg; | |
819 | old_subsec = now_subseg; | |
820 | ||
19203624 | 821 | arc_set_ext_seg (); |
0d2bcfaf | 822 | |
19203624 KH |
823 | p = frag_more (1); |
824 | *p = 5 + name_len + 1; | |
825 | p = frag_more (1); | |
0d2bcfaf | 826 | *p = EXT_INSTRUCTION; |
19203624 | 827 | p = frag_more (1); |
0d2bcfaf | 828 | *p = opcode; |
19203624 | 829 | p = frag_more (1); |
0d2bcfaf | 830 | *p = subopcode; |
19203624 | 831 | p = frag_more (1); |
0d2bcfaf | 832 | *p = (class & (OP1_MUST_BE_IMM | OP1_IMM_IMPLIED) ? IGNORE_FIRST_OPD : 0); |
19203624 KH |
833 | p = frag_more (name_len); |
834 | strncpy (p, syntax, name_len); | |
835 | p = frag_more (1); | |
0d2bcfaf NC |
836 | *p = '\0'; |
837 | ||
838 | subseg_set (old_sec, old_subsec); | |
839 | ||
19203624 | 840 | demand_empty_rest_of_line (); |
252b5132 RH |
841 | } |
842 | ||
252b5132 | 843 | static void |
ea1562b3 | 844 | arc_common (int localScope) |
252b5132 | 845 | { |
0d2bcfaf | 846 | char *name; |
252b5132 | 847 | char c; |
0d2bcfaf | 848 | char *p; |
19203624 | 849 | int align, size; |
0d2bcfaf | 850 | symbolS *symbolP; |
252b5132 | 851 | |
0d2bcfaf NC |
852 | name = input_line_pointer; |
853 | c = get_symbol_end (); | |
bcee8eb8 | 854 | /* just after name is now '\0' */ |
0d2bcfaf NC |
855 | p = input_line_pointer; |
856 | *p = c; | |
857 | SKIP_WHITESPACE (); | |
858 | ||
859 | if (*input_line_pointer != ',') | |
252b5132 | 860 | { |
0d2bcfaf | 861 | as_bad ("expected comma after symbol name"); |
252b5132 RH |
862 | ignore_rest_of_line (); |
863 | return; | |
864 | } | |
865 | ||
bcee8eb8 | 866 | input_line_pointer++; /* skip ',' */ |
0d2bcfaf | 867 | size = get_absolute_expression (); |
252b5132 | 868 | |
0d2bcfaf NC |
869 | if (size < 0) |
870 | { | |
871 | as_bad ("negative symbol length"); | |
872 | ignore_rest_of_line (); | |
873 | return; | |
874 | } | |
252b5132 | 875 | |
0d2bcfaf NC |
876 | *p = 0; |
877 | symbolP = symbol_find_or_make (name); | |
878 | *p = c; | |
879 | ||
880 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
881 | { | |
882 | as_bad ("ignoring attempt to re-define symbol"); | |
883 | ignore_rest_of_line (); | |
884 | return; | |
885 | } | |
19203624 KH |
886 | if (((int) S_GET_VALUE (symbolP) != 0) \ |
887 | && ((int) S_GET_VALUE (symbolP) != size)) | |
0d2bcfaf NC |
888 | { |
889 | as_warn ("length of symbol \"%s\" already %ld, ignoring %d", | |
890 | S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size); | |
891 | } | |
892 | assert (symbolP->sy_frag == &zero_address_frag); | |
893 | ||
0d2bcfaf NC |
894 | /* Now parse the alignment field. This field is optional for |
895 | local and global symbols. Default alignment is zero. */ | |
896 | if (*input_line_pointer == ',') | |
897 | { | |
898 | input_line_pointer++; | |
899 | align = get_absolute_expression (); | |
900 | if (align < 0) | |
901 | { | |
902 | align = 0; | |
903 | as_warn ("assuming symbol alignment of zero"); | |
904 | } | |
905 | } | |
252b5132 | 906 | else |
0d2bcfaf NC |
907 | align = 0; |
908 | ||
909 | if (localScope != 0) | |
252b5132 | 910 | { |
0d2bcfaf NC |
911 | segT old_sec; |
912 | int old_subsec; | |
913 | char *pfrag; | |
914 | ||
915 | old_sec = now_seg; | |
916 | old_subsec = now_subseg; | |
917 | record_alignment (bss_section, align); | |
bcee8eb8 | 918 | subseg_set (bss_section, 0); /* ??? subseg_set (bss_section, 1); ??? */ |
0d2bcfaf NC |
919 | |
920 | if (align) | |
19203624 KH |
921 | /* Do alignment. */ |
922 | frag_align (align, 0, 0); | |
0d2bcfaf | 923 | |
19203624 | 924 | /* Detach from old frag. */ |
0d2bcfaf NC |
925 | if (S_GET_SEGMENT (symbolP) == bss_section) |
926 | symbolP->sy_frag->fr_symbol = NULL; | |
927 | ||
928 | symbolP->sy_frag = frag_now; | |
929 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, | |
19203624 | 930 | (offsetT) size, (char *) 0); |
0d2bcfaf NC |
931 | *pfrag = 0; |
932 | ||
933 | S_SET_SIZE (symbolP, size); | |
934 | S_SET_SEGMENT (symbolP, bss_section); | |
935 | S_CLEAR_EXTERNAL (symbolP); | |
936 | symbolP->local = 1; | |
937 | subseg_set (old_sec, old_subsec); | |
938 | } | |
939 | else | |
940 | { | |
941 | S_SET_VALUE (symbolP, (valueT) size); | |
942 | S_SET_ALIGN (symbolP, align); | |
943 | S_SET_EXTERNAL (symbolP); | |
944 | S_SET_SEGMENT (symbolP, bfd_com_section_ptr); | |
252b5132 | 945 | } |
252b5132 | 946 | |
0d2bcfaf NC |
947 | symbolP->bsym->flags |= BSF_OBJECT; |
948 | ||
949 | demand_empty_rest_of_line (); | |
252b5132 | 950 | } |
0d2bcfaf | 951 | \f |
0d2bcfaf | 952 | /* Select the cpu we're assembling for. */ |
252b5132 RH |
953 | |
954 | static void | |
ea1562b3 | 955 | arc_option (int ignore ATTRIBUTE_UNUSED) |
252b5132 | 956 | { |
ea1562b3 | 957 | extern int arc_get_mach (char *); |
0d2bcfaf | 958 | int mach; |
252b5132 | 959 | char c; |
0d2bcfaf | 960 | char *cpu; |
252b5132 | 961 | |
0d2bcfaf | 962 | cpu = input_line_pointer; |
252b5132 | 963 | c = get_symbol_end (); |
0d2bcfaf | 964 | mach = arc_get_mach (cpu); |
252b5132 RH |
965 | *input_line_pointer = c; |
966 | ||
0d2bcfaf NC |
967 | /* If an instruction has already been seen, it's too late. */ |
968 | if (cpu_tables_init_p) | |
252b5132 | 969 | { |
0d2bcfaf | 970 | as_bad ("\".option\" directive must appear before any instructions"); |
252b5132 RH |
971 | ignore_rest_of_line (); |
972 | return; | |
973 | } | |
252b5132 | 974 | |
0d2bcfaf NC |
975 | if (mach == -1) |
976 | goto bad_cpu; | |
977 | ||
978 | if (mach_type_specified_p && mach != arc_mach_type) | |
252b5132 | 979 | { |
0d2bcfaf | 980 | as_bad ("\".option\" directive conflicts with initial definition"); |
252b5132 RH |
981 | ignore_rest_of_line (); |
982 | return; | |
983 | } | |
0d2bcfaf NC |
984 | else |
985 | { | |
986 | /* The cpu may have been selected on the command line. */ | |
987 | if (mach != arc_mach_type) | |
988 | as_warn ("\".option\" directive overrides command-line (default) value"); | |
989 | arc_mach_type = mach; | |
990 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach)) | |
991 | as_fatal ("could not set architecture and machine"); | |
992 | mach_type_specified_p = 1; | |
993 | } | |
252b5132 | 994 | demand_empty_rest_of_line (); |
0d2bcfaf NC |
995 | return; |
996 | ||
997 | bad_cpu: | |
998 | as_bad ("invalid identifier for \".option\""); | |
999 | ignore_rest_of_line (); | |
252b5132 | 1000 | } |
252b5132 | 1001 | \f |
19203624 KH |
1002 | /* Turn a string in input_line_pointer into a floating point constant |
1003 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
1004 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
1005 | returned, or NULL on OK. */ | |
252b5132 | 1006 | |
0d2bcfaf | 1007 | /* Equal to MAX_PRECISION in atof-ieee.c */ |
252b5132 RH |
1008 | #define MAX_LITTLENUMS 6 |
1009 | ||
1010 | char * | |
ea1562b3 | 1011 | md_atof (int type, char *litP, int *sizeP) |
252b5132 RH |
1012 | { |
1013 | int prec; | |
1014 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
1015 | LITTLENUM_TYPE *wordP; | |
1016 | char *t; | |
252b5132 RH |
1017 | |
1018 | switch (type) | |
1019 | { | |
1020 | case 'f': | |
1021 | case 'F': | |
1022 | prec = 2; | |
1023 | break; | |
1024 | ||
1025 | case 'd': | |
1026 | case 'D': | |
1027 | prec = 4; | |
1028 | break; | |
1029 | ||
1030 | default: | |
1031 | *sizeP = 0; | |
0d2bcfaf | 1032 | return "bad call to md_atof"; |
252b5132 RH |
1033 | } |
1034 | ||
1035 | t = atof_ieee (input_line_pointer, type, words); | |
1036 | if (t) | |
1037 | input_line_pointer = t; | |
1038 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
1039 | for (wordP = words; prec--;) | |
1040 | { | |
1041 | md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE)); | |
1042 | litP += sizeof (LITTLENUM_TYPE); | |
1043 | } | |
1044 | ||
1045 | return NULL; | |
1046 | } | |
1047 | ||
1048 | /* Write a value out to the object file, using the appropriate | |
1049 | endianness. */ | |
1050 | ||
1051 | void | |
ea1562b3 | 1052 | md_number_to_chars (char *buf, valueT val, int n) |
252b5132 RH |
1053 | { |
1054 | if (target_big_endian) | |
1055 | number_to_chars_bigendian (buf, val, n); | |
1056 | else | |
1057 | number_to_chars_littleendian (buf, val, n); | |
1058 | } | |
1059 | ||
bfb32b52 | 1060 | /* Round up a section size to the appropriate boundary. */ |
252b5132 RH |
1061 | |
1062 | valueT | |
ea1562b3 | 1063 | md_section_align (segT segment, valueT size) |
252b5132 RH |
1064 | { |
1065 | int align = bfd_get_section_alignment (stdoutput, segment); | |
1066 | ||
1067 | return ((size + (1 << align) - 1) & (-1 << align)); | |
1068 | } | |
1069 | ||
1070 | /* We don't have any form of relaxing. */ | |
1071 | ||
1072 | int | |
ea1562b3 NC |
1073 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, |
1074 | asection *seg ATTRIBUTE_UNUSED) | |
252b5132 | 1075 | { |
0d2bcfaf NC |
1076 | as_fatal (_("md_estimate_size_before_relax\n")); |
1077 | return 1; | |
252b5132 RH |
1078 | } |
1079 | ||
1080 | /* Convert a machine dependent frag. We never generate these. */ | |
1081 | ||
1082 | void | |
ea1562b3 NC |
1083 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
1084 | asection *sec ATTRIBUTE_UNUSED, | |
1085 | fragS *fragp ATTRIBUTE_UNUSED) | |
252b5132 | 1086 | { |
0d2bcfaf NC |
1087 | as_fatal (_("md_convert_frag\n")); |
1088 | } | |
1089 | ||
ea1562b3 NC |
1090 | static void |
1091 | arc_code_symbol (expressionS *expressionP) | |
0d2bcfaf | 1092 | { |
d3ecfc59 | 1093 | if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0) |
0d2bcfaf | 1094 | { |
1e07b820 | 1095 | expressionS two; |
ea1562b3 | 1096 | |
1e07b820 | 1097 | expressionP->X_op = O_right_shift; |
bcee8eb8 | 1098 | expressionP->X_add_symbol->sy_value.X_op = O_constant; |
1e07b820 KH |
1099 | two.X_op = O_constant; |
1100 | two.X_add_symbol = two.X_op_symbol = NULL; | |
1101 | two.X_add_number = 2; | |
1102 | expressionP->X_op_symbol = make_expr_symbol (&two); | |
0d2bcfaf | 1103 | } |
bcee8eb8 | 1104 | /* Allow %st(sym1-sym2) */ |
19203624 KH |
1105 | else if (expressionP->X_op == O_subtract |
1106 | && expressionP->X_add_symbol != NULL | |
1107 | && expressionP->X_op_symbol != NULL | |
1108 | && expressionP->X_add_number == 0) | |
0d2bcfaf | 1109 | { |
1e07b820 | 1110 | expressionS two; |
ea1562b3 | 1111 | |
1e07b820 KH |
1112 | expressionP->X_add_symbol = make_expr_symbol (expressionP); |
1113 | expressionP->X_op = O_right_shift; | |
1114 | two.X_op = O_constant; | |
1115 | two.X_add_symbol = two.X_op_symbol = NULL; | |
1116 | two.X_add_number = 2; | |
1117 | expressionP->X_op_symbol = make_expr_symbol (&two); | |
0d2bcfaf NC |
1118 | } |
1119 | else | |
ea1562b3 | 1120 | as_bad ("expression too complex code symbol"); |
252b5132 RH |
1121 | } |
1122 | ||
1123 | /* Parse an operand that is machine-specific. | |
1124 | ||
1125 | The ARC has a special %-op to adjust addresses so they're usable in | |
1126 | branches. The "st" is short for the STatus register. | |
1127 | ??? Later expand this to take a flags value too. | |
1128 | ||
1129 | ??? We can't create new expression types so we map the %-op's onto the | |
1130 | existing syntax. This means that the user could use the chosen syntax | |
bfb32b52 | 1131 | to achieve the same effect. */ |
252b5132 | 1132 | |
bfb32b52 | 1133 | void |
ea1562b3 | 1134 | md_operand (expressionS *expressionP) |
252b5132 RH |
1135 | { |
1136 | char *p = input_line_pointer; | |
1137 | ||
f17c130b AM |
1138 | if (*p != '%') |
1139 | return; | |
1140 | ||
1141 | if (strncmp (p, "%st(", 4) == 0) | |
1142 | { | |
1143 | input_line_pointer += 4; | |
1144 | expression (expressionP); | |
1145 | if (*input_line_pointer != ')') | |
1146 | { | |
1147 | as_bad ("missing ')' in %%-op"); | |
1148 | return; | |
1149 | } | |
1150 | ++input_line_pointer; | |
1151 | arc_code_symbol (expressionP); | |
1152 | } | |
1153 | else | |
1154 | { | |
1155 | /* It could be a register. */ | |
1156 | int i, l; | |
1157 | struct arc_ext_operand_value *ext_oper = arc_ext_operands; | |
1158 | p++; | |
1159 | ||
1160 | while (ext_oper) | |
1161 | { | |
1162 | l = strlen (ext_oper->operand.name); | |
1163 | if (!strncmp (p, ext_oper->operand.name, l) && !ISALNUM (*(p + l))) | |
1164 | { | |
1165 | input_line_pointer += l + 1; | |
1166 | expressionP->X_op = O_register; | |
52de4c06 | 1167 | expressionP->X_add_number = (offsetT) &ext_oper->operand; |
f17c130b AM |
1168 | return; |
1169 | } | |
1170 | ext_oper = ext_oper->next; | |
1171 | } | |
1172 | for (i = 0; i < arc_reg_names_count; i++) | |
1173 | { | |
1174 | l = strlen (arc_reg_names[i].name); | |
1175 | if (!strncmp (p, arc_reg_names[i].name, l) && !ISALNUM (*(p + l))) | |
1176 | { | |
1177 | input_line_pointer += l + 1; | |
1178 | expressionP->X_op = O_register; | |
52de4c06 | 1179 | expressionP->X_add_number = (offsetT) &arc_reg_names[i]; |
f17c130b AM |
1180 | break; |
1181 | } | |
1182 | } | |
1183 | } | |
252b5132 RH |
1184 | } |
1185 | ||
1186 | /* We have no need to default values of symbols. | |
1187 | We could catch register names here, but that is handled by inserting | |
1188 | them all in the symbol table to begin with. */ | |
1189 | ||
1190 | symbolS * | |
ea1562b3 | 1191 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
252b5132 RH |
1192 | { |
1193 | return 0; | |
1194 | } | |
1195 | \f | |
1196 | /* Functions concerning expressions. */ | |
1197 | ||
1198 | /* Parse a .byte, .word, etc. expression. | |
1199 | ||
1200 | Values for the status register are specified with %st(label). | |
1201 | `label' will be right shifted by 2. */ | |
1202 | ||
1203 | void | |
ea1562b3 NC |
1204 | arc_parse_cons_expression (expressionS *exp, |
1205 | unsigned int nbytes ATTRIBUTE_UNUSED) | |
252b5132 | 1206 | { |
0d2bcfaf NC |
1207 | char *p = input_line_pointer; |
1208 | int code_symbol_fix = 0; | |
1209 | ||
19203624 KH |
1210 | for (; ! is_end_of_line[(unsigned char) *p]; p++) |
1211 | if (*p == '@' && !strncmp (p, "@h30", 4)) | |
0d2bcfaf | 1212 | { |
1e07b820 | 1213 | code_symbol_fix = 1; |
19203624 | 1214 | strcpy (p, "; "); |
0d2bcfaf | 1215 | } |
9497f5ac | 1216 | expression_and_evaluate (exp); |
1e07b820 KH |
1217 | if (code_symbol_fix) |
1218 | { | |
19203624 | 1219 | arc_code_symbol (exp); |
1e07b820 KH |
1220 | input_line_pointer = p; |
1221 | } | |
252b5132 RH |
1222 | } |
1223 | ||
1224 | /* Record a fixup for a cons expression. */ | |
1225 | ||
1226 | void | |
ea1562b3 NC |
1227 | arc_cons_fix_new (fragS *frag, |
1228 | int where, | |
1229 | int nbytes, | |
1230 | expressionS *exp) | |
252b5132 RH |
1231 | { |
1232 | if (nbytes == 4) | |
1233 | { | |
1234 | int reloc_type; | |
1235 | expressionS exptmp; | |
1236 | ||
1237 | /* This may be a special ARC reloc (eg: %st()). */ | |
1238 | reloc_type = get_arc_exp_reloc_type (1, BFD_RELOC_32, exp, &exptmp); | |
1239 | fix_new_exp (frag, where, nbytes, &exptmp, 0, reloc_type); | |
1240 | } | |
1241 | else | |
1242 | { | |
1243 | fix_new_exp (frag, where, nbytes, exp, 0, | |
1244 | nbytes == 2 ? BFD_RELOC_16 | |
1245 | : nbytes == 8 ? BFD_RELOC_64 | |
1246 | : BFD_RELOC_32); | |
1247 | } | |
1248 | } | |
1249 | \f | |
1250 | /* Functions concerning relocs. */ | |
1251 | ||
1252 | /* The location from which a PC relative jump should be calculated, | |
1253 | given a PC relative reloc. */ | |
1254 | ||
bfb32b52 | 1255 | long |
ea1562b3 | 1256 | md_pcrel_from (fixS *fixP) |
252b5132 | 1257 | { |
252b5132 RH |
1258 | /* Return the address of the delay slot. */ |
1259 | return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; | |
1260 | } | |
1261 | ||
252b5132 RH |
1262 | /* Apply a fixup to the object code. This is called for all the |
1263 | fixups we generated by the call to fix_new_exp, above. In the call | |
1264 | above we used a reloc code which was the largest legal reloc code | |
1265 | plus the operand index. Here we undo that to recover the operand | |
1266 | index. At this point all symbol values should be fully resolved, | |
1267 | and we attempt to completely resolve the reloc. If we can not do | |
1268 | that, we determine the correct reloc code and put it back in the fixup. */ | |
1269 | ||
94f592af | 1270 | void |
55cf6793 | 1271 | md_apply_fix (fixS *fixP, valueT * valP, segT seg) |
252b5132 | 1272 | { |
94f592af | 1273 | valueT value = * valP; |
252b5132 | 1274 | |
252b5132 | 1275 | if (fixP->fx_addsy == (symbolS *) NULL) |
94f592af NC |
1276 | fixP->fx_done = 1; |
1277 | ||
252b5132 RH |
1278 | else if (fixP->fx_pcrel) |
1279 | { | |
a161fe53 AM |
1280 | /* Hack around bfd_install_relocation brain damage. */ |
1281 | if (S_GET_SEGMENT (fixP->fx_addsy) != seg) | |
252b5132 RH |
1282 | value += md_pcrel_from (fixP); |
1283 | } | |
a161fe53 AM |
1284 | |
1285 | /* We can't actually support subtracting a symbol. */ | |
1286 | if (fixP->fx_subsy != NULL) | |
1287 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
252b5132 RH |
1288 | |
1289 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
1290 | { | |
1291 | int opindex; | |
1292 | const struct arc_operand *operand; | |
1293 | char *where; | |
1294 | arc_insn insn; | |
1295 | ||
1296 | opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
1297 | ||
1298 | operand = &arc_operands[opindex]; | |
1299 | ||
1300 | /* Fetch the instruction, insert the fully resolved operand | |
1301 | value, and stuff the instruction back again. */ | |
1302 | where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
1303 | if (target_big_endian) | |
1304 | insn = bfd_getb32 ((unsigned char *) where); | |
1305 | else | |
1306 | insn = bfd_getl32 ((unsigned char *) where); | |
1307 | insn = arc_insert_operand (insn, operand, -1, NULL, (offsetT) value, | |
1308 | fixP->fx_file, fixP->fx_line); | |
1309 | if (target_big_endian) | |
1310 | bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); | |
1311 | else | |
1312 | bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); | |
1313 | ||
1314 | if (fixP->fx_done) | |
ea1562b3 NC |
1315 | /* Nothing else to do here. */ |
1316 | return; | |
252b5132 RH |
1317 | |
1318 | /* Determine a BFD reloc value based on the operand information. | |
1319 | We are only prepared to turn a few of the operands into relocs. | |
1320 | !!! Note that we can't handle limm values here. Since we're using | |
1321 | implicit addends the addend must be inserted into the instruction, | |
1322 | however, the opcode insertion routines currently do nothing with | |
1323 | limm values. */ | |
1324 | if (operand->fmt == 'B') | |
1325 | { | |
1326 | assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0 | |
1327 | && operand->bits == 20 | |
1328 | && operand->shift == 7); | |
1329 | fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL; | |
1330 | } | |
0d2bcfaf | 1331 | else if (operand->fmt == 'J') |
252b5132 RH |
1332 | { |
1333 | assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0 | |
1334 | && operand->bits == 24 | |
1335 | && operand->shift == 32); | |
1336 | fixP->fx_r_type = BFD_RELOC_ARC_B26; | |
1337 | } | |
0d2bcfaf | 1338 | else if (operand->fmt == 'L') |
252b5132 RH |
1339 | { |
1340 | assert ((operand->flags & ARC_OPERAND_LIMM) != 0 | |
1341 | && operand->bits == 32 | |
1342 | && operand->shift == 32); | |
1343 | fixP->fx_r_type = BFD_RELOC_32; | |
1344 | } | |
1345 | else | |
1346 | { | |
1347 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0d2bcfaf | 1348 | "unresolved expression that must be resolved"); |
252b5132 | 1349 | fixP->fx_done = 1; |
94f592af | 1350 | return; |
252b5132 RH |
1351 | } |
1352 | } | |
1353 | else | |
1354 | { | |
1355 | switch (fixP->fx_r_type) | |
1356 | { | |
1357 | case BFD_RELOC_8: | |
1358 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
1359 | value, 1); | |
1360 | break; | |
1361 | case BFD_RELOC_16: | |
1362 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
1363 | value, 2); | |
1364 | break; | |
1365 | case BFD_RELOC_32: | |
1366 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
1367 | value, 4); | |
1368 | break; | |
252b5132 RH |
1369 | case BFD_RELOC_ARC_B26: |
1370 | /* If !fixP->fx_done then `value' is an implicit addend. | |
1371 | We must shift it right by 2 in this case as well because the | |
1372 | linker performs the relocation and then adds this in (as opposed | |
1373 | to adding this in and then shifting right by 2). */ | |
1374 | value >>= 2; | |
1375 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
1376 | value, 4); | |
1377 | break; | |
1378 | default: | |
1379 | abort (); | |
1380 | } | |
1381 | } | |
252b5132 RH |
1382 | } |
1383 | ||
1384 | /* Translate internal representation of relocation info to BFD target | |
1385 | format. */ | |
1386 | ||
1387 | arelent * | |
ea1562b3 NC |
1388 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, |
1389 | fixS *fixP) | |
252b5132 RH |
1390 | { |
1391 | arelent *reloc; | |
1392 | ||
ea1562b3 NC |
1393 | reloc = xmalloc (sizeof (arelent)); |
1394 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
252b5132 | 1395 | |
65555e64 | 1396 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
252b5132 RH |
1397 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; |
1398 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
1399 | if (reloc->howto == (reloc_howto_type *) NULL) | |
1400 | { | |
1401 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
0d2bcfaf | 1402 | "internal error: can't export reloc type %d (`%s')", |
19203624 KH |
1403 | fixP->fx_r_type, |
1404 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
252b5132 RH |
1405 | return NULL; |
1406 | } | |
1407 | ||
1408 | assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); | |
1409 | ||
19203624 | 1410 | /* Set addend to account for PC being advanced one insn before the |
a161fe53 | 1411 | target address is computed. */ |
252b5132 | 1412 | |
19203624 | 1413 | reloc->addend = (fixP->fx_pcrel ? -4 : 0); |
252b5132 | 1414 | |
0d2bcfaf | 1415 | return reloc; |
252b5132 | 1416 | } |
ea1562b3 NC |
1417 | |
1418 | const pseudo_typeS md_pseudo_table[] = | |
1419 | { | |
1420 | { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */ | |
1421 | { "comm", arc_common, 0 }, | |
1422 | { "common", arc_common, 0 }, | |
1423 | { "lcomm", arc_common, 1 }, | |
1424 | { "lcommon", arc_common, 1 }, | |
1425 | { "2byte", cons, 2 }, | |
1426 | { "half", cons, 2 }, | |
1427 | { "short", cons, 2 }, | |
1428 | { "3byte", cons, 3 }, | |
1429 | { "4byte", cons, 4 }, | |
1430 | { "word", cons, 4 }, | |
1431 | { "option", arc_option, 0 }, | |
1432 | { "cpu", arc_option, 0 }, | |
1433 | { "block", s_space, 0 }, | |
1434 | { "extcondcode", arc_extoper, 0 }, | |
1435 | { "extcoreregister", arc_extoper, 1 }, | |
1436 | { "extauxregister", arc_extoper, 2 }, | |
1437 | { "extinstruction", arc_extinst, 0 }, | |
1438 | { NULL, 0, 0 }, | |
1439 | }; | |
1440 | ||
1441 | /* This routine is called for each instruction to be assembled. */ | |
1442 | ||
1443 | void | |
1444 | md_assemble (char *str) | |
1445 | { | |
1446 | const struct arc_opcode *opcode; | |
1447 | const struct arc_opcode *std_opcode; | |
1448 | struct arc_opcode *ext_opcode; | |
1449 | char *start; | |
1450 | const char *last_errmsg = 0; | |
1451 | arc_insn insn; | |
1452 | static int init_tables_p = 0; | |
1453 | ||
1454 | /* Opcode table initialization is deferred until here because we have to | |
1455 | wait for a possible .option command. */ | |
1456 | if (!init_tables_p) | |
1457 | { | |
1458 | init_opcode_tables (arc_mach_type); | |
1459 | init_tables_p = 1; | |
1460 | } | |
1461 | ||
1462 | /* Skip leading white space. */ | |
1463 | while (ISSPACE (*str)) | |
1464 | str++; | |
1465 | ||
1466 | /* The instructions are stored in lists hashed by the first letter (though | |
1467 | we needn't care how they're hashed). Get the first in the list. */ | |
1468 | ||
1469 | ext_opcode = arc_ext_opcodes; | |
1470 | std_opcode = arc_opcode_lookup_asm (str); | |
1471 | ||
1472 | /* Keep looking until we find a match. */ | |
1473 | start = str; | |
1474 | for (opcode = (ext_opcode ? ext_opcode : std_opcode); | |
1475 | opcode != NULL; | |
1476 | opcode = (ARC_OPCODE_NEXT_ASM (opcode) | |
1477 | ? ARC_OPCODE_NEXT_ASM (opcode) | |
1478 | : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL))) | |
1479 | { | |
1480 | int past_opcode_p, fc, num_suffixes; | |
1481 | int fix_up_at = 0; | |
1482 | char *syn; | |
1483 | struct arc_fixup fixups[MAX_FIXUPS]; | |
1484 | /* Used as a sanity check. If we need a limm reloc, make sure we ask | |
1485 | for an extra 4 bytes from frag_more. */ | |
1486 | int limm_reloc_p; | |
1487 | int ext_suffix_p; | |
1488 | const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES]; | |
1489 | ||
1490 | /* Is this opcode supported by the selected cpu? */ | |
1491 | if (! arc_opcode_supported (opcode)) | |
1492 | continue; | |
1493 | ||
1494 | /* Scan the syntax string. If it doesn't match, try the next one. */ | |
1495 | arc_opcode_init_insert (); | |
1496 | insn = opcode->value; | |
1497 | fc = 0; | |
1498 | past_opcode_p = 0; | |
1499 | num_suffixes = 0; | |
1500 | limm_reloc_p = 0; | |
1501 | ext_suffix_p = 0; | |
1502 | ||
1503 | /* We don't check for (*str != '\0') here because we want to parse | |
1504 | any trailing fake arguments in the syntax string. */ | |
1505 | for (str = start, syn = opcode->syntax; *syn != '\0';) | |
1506 | { | |
1507 | int mods; | |
1508 | const struct arc_operand *operand; | |
1509 | ||
1510 | /* Non operand chars must match exactly. */ | |
1511 | if (*syn != '%' || *++syn == '%') | |
1512 | { | |
1513 | if (*str == *syn) | |
1514 | { | |
1515 | if (*syn == ' ') | |
1516 | past_opcode_p = 1; | |
1517 | ++syn; | |
1518 | ++str; | |
1519 | } | |
1520 | else | |
1521 | break; | |
1522 | continue; | |
1523 | } | |
1524 | ||
1525 | /* We have an operand. Pick out any modifiers. */ | |
1526 | mods = 0; | |
1527 | while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags)) | |
1528 | { | |
1529 | mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS; | |
1530 | ++syn; | |
1531 | } | |
1532 | operand = arc_operands + arc_operand_map[(int) *syn]; | |
1533 | if (operand->fmt == 0) | |
1534 | as_fatal ("unknown syntax format character `%c'", *syn); | |
1535 | ||
1536 | if (operand->flags & ARC_OPERAND_FAKE) | |
1537 | { | |
1538 | const char *errmsg = NULL; | |
1539 | if (operand->insert) | |
1540 | { | |
1541 | insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg); | |
1542 | if (errmsg != (const char *) NULL) | |
1543 | { | |
1544 | last_errmsg = errmsg; | |
1545 | if (operand->flags & ARC_OPERAND_ERROR) | |
1546 | { | |
1547 | as_bad (errmsg); | |
1548 | return; | |
1549 | } | |
1550 | else if (operand->flags & ARC_OPERAND_WARN) | |
1551 | as_warn (errmsg); | |
1552 | break; | |
1553 | } | |
1554 | if (limm_reloc_p | |
1555 | && (operand->flags && operand->flags & ARC_OPERAND_LIMM) | |
1556 | && (operand->flags & | |
1557 | (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS))) | |
1558 | { | |
1559 | fixups[fix_up_at].opindex = arc_operand_map[operand->fmt]; | |
1560 | } | |
1561 | } | |
1562 | ++syn; | |
1563 | } | |
1564 | /* Are we finished with suffixes? */ | |
1565 | else if (!past_opcode_p) | |
1566 | { | |
1567 | int found; | |
1568 | char c; | |
1569 | char *s, *t; | |
1570 | const struct arc_operand_value *suf, *suffix_end; | |
1571 | const struct arc_operand_value *suffix = NULL; | |
1572 | ||
1573 | if (!(operand->flags & ARC_OPERAND_SUFFIX)) | |
1574 | abort (); | |
1575 | ||
1576 | /* If we're at a space in the input string, we want to skip the | |
1577 | remaining suffixes. There may be some fake ones though, so | |
1578 | just go on to try the next one. */ | |
1579 | if (*str == ' ') | |
1580 | { | |
1581 | ++syn; | |
1582 | continue; | |
1583 | } | |
1584 | ||
1585 | s = str; | |
1586 | if (mods & ARC_MOD_DOT) | |
1587 | { | |
1588 | if (*s != '.') | |
1589 | break; | |
1590 | ++s; | |
1591 | } | |
1592 | else | |
1593 | { | |
1594 | /* This can happen in "b.nd foo" and we're currently looking | |
1595 | for "%q" (ie: a condition code suffix). */ | |
1596 | if (*s == '.') | |
1597 | { | |
1598 | ++syn; | |
1599 | continue; | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | /* Pick the suffix out and look it up via the hash table. */ | |
1604 | for (t = s; *t && ISALNUM (*t); ++t) | |
1605 | continue; | |
1606 | c = *t; | |
1607 | *t = '\0'; | |
1608 | if ((suf = get_ext_suffix (s))) | |
1609 | ext_suffix_p = 1; | |
1610 | else | |
1611 | suf = hash_find (arc_suffix_hash, s); | |
1612 | if (!suf) | |
1613 | { | |
1614 | /* This can happen in "blle foo" and we're currently using | |
1615 | the template "b%q%.n %j". The "bl" insn occurs later in | |
1616 | the table so "lle" isn't an illegal suffix. */ | |
1617 | *t = c; | |
1618 | break; | |
1619 | } | |
1620 | ||
1621 | /* Is it the right type? Note that the same character is used | |
1622 | several times, so we have to examine all of them. This is | |
1623 | relatively efficient as equivalent entries are kept | |
1624 | together. If it's not the right type, don't increment `str' | |
1625 | so we try the next one in the series. */ | |
1626 | found = 0; | |
1627 | if (ext_suffix_p && arc_operands[suf->type].fmt == *syn) | |
1628 | { | |
1629 | /* Insert the suffix's value into the insn. */ | |
1630 | *t = c; | |
1631 | if (operand->insert) | |
1632 | insn = (*operand->insert) (insn, operand, | |
1633 | mods, NULL, suf->value, | |
1634 | NULL); | |
1635 | else | |
1636 | insn |= suf->value << operand->shift; | |
1637 | suffix = suf; | |
1638 | str = t; | |
1639 | found = 1; | |
1640 | } | |
1641 | else | |
1642 | { | |
1643 | *t = c; | |
1644 | suffix_end = arc_suffixes + arc_suffixes_count; | |
1645 | for (suffix = suf; | |
1646 | suffix < suffix_end && strcmp (suffix->name, suf->name) == 0; | |
1647 | ++suffix) | |
1648 | { | |
1649 | if (arc_operands[suffix->type].fmt == *syn) | |
1650 | { | |
1651 | /* Insert the suffix's value into the insn. */ | |
1652 | if (operand->insert) | |
1653 | insn = (*operand->insert) (insn, operand, | |
1654 | mods, NULL, suffix->value, | |
1655 | NULL); | |
1656 | else | |
1657 | insn |= suffix->value << operand->shift; | |
1658 | ||
1659 | str = t; | |
1660 | found = 1; | |
1661 | break; | |
1662 | } | |
1663 | } | |
1664 | } | |
1665 | ++syn; | |
1666 | if (!found) | |
1667 | /* Wrong type. Just go on to try next insn entry. */ | |
1668 | ; | |
1669 | else | |
1670 | { | |
1671 | if (num_suffixes == MAX_SUFFIXES) | |
1672 | as_bad ("too many suffixes"); | |
1673 | else | |
1674 | insn_suffixes[num_suffixes++] = suffix; | |
1675 | } | |
1676 | } | |
1677 | else | |
1678 | /* This is either a register or an expression of some kind. */ | |
1679 | { | |
1680 | char *hold; | |
1681 | const struct arc_operand_value *reg = NULL; | |
1682 | long value = 0; | |
1683 | expressionS exp; | |
1684 | ||
1685 | if (operand->flags & ARC_OPERAND_SUFFIX) | |
1686 | abort (); | |
1687 | ||
1688 | /* Is there anything left to parse? | |
1689 | We don't check for this at the top because we want to parse | |
1690 | any trailing fake arguments in the syntax string. */ | |
1691 | if (is_end_of_line[(unsigned char) *str]) | |
1692 | break; | |
1693 | ||
1694 | /* Parse the operand. */ | |
1695 | hold = input_line_pointer; | |
1696 | input_line_pointer = str; | |
1697 | expression (&exp); | |
1698 | str = input_line_pointer; | |
1699 | input_line_pointer = hold; | |
1700 | ||
1701 | if (exp.X_op == O_illegal) | |
1702 | as_bad ("illegal operand"); | |
1703 | else if (exp.X_op == O_absent) | |
1704 | as_bad ("missing operand"); | |
1705 | else if (exp.X_op == O_constant) | |
1706 | value = exp.X_add_number; | |
1707 | else if (exp.X_op == O_register) | |
1708 | reg = (struct arc_operand_value *) exp.X_add_number; | |
1709 | #define IS_REG_DEST_OPERAND(o) ((o) == 'a') | |
1710 | else if (IS_REG_DEST_OPERAND (*syn)) | |
1711 | as_bad ("symbol as destination register"); | |
1712 | else | |
1713 | { | |
1714 | if (!strncmp (str, "@h30", 4)) | |
1715 | { | |
1716 | arc_code_symbol (&exp); | |
1717 | str += 4; | |
1718 | } | |
1719 | /* We need to generate a fixup for this expression. */ | |
1720 | if (fc >= MAX_FIXUPS) | |
1721 | as_fatal ("too many fixups"); | |
1722 | fixups[fc].exp = exp; | |
1723 | /* We don't support shimm relocs. break here to force | |
1724 | the assembler to output a limm. */ | |
1725 | #define IS_REG_SHIMM_OFFSET(o) ((o) == 'd') | |
1726 | if (IS_REG_SHIMM_OFFSET (*syn)) | |
1727 | break; | |
1728 | /* If this is a register constant (IE: one whose | |
1729 | register value gets stored as 61-63) then this | |
1730 | must be a limm. */ | |
1731 | /* ??? This bit could use some cleaning up. | |
1732 | Referencing the format chars like this goes | |
1733 | against style. */ | |
1734 | if (IS_SYMBOL_OPERAND (*syn)) | |
1735 | { | |
1736 | const char *junk; | |
1737 | limm_reloc_p = 1; | |
1738 | /* Save this, we don't yet know what reloc to use. */ | |
1739 | fix_up_at = fc; | |
1740 | /* Tell insert_reg we need a limm. This is | |
1741 | needed because the value at this point is | |
1742 | zero, a shimm. */ | |
1743 | /* ??? We need a cleaner interface than this. */ | |
1744 | (*arc_operands[arc_operand_map['Q']].insert) | |
1745 | (insn, operand, mods, reg, 0L, &junk); | |
1746 | } | |
1747 | else | |
1748 | fixups[fc].opindex = arc_operand_map[(int) *syn]; | |
1749 | ++fc; | |
1750 | value = 0; | |
1751 | } | |
1752 | ||
1753 | /* Insert the register or expression into the instruction. */ | |
1754 | if (operand->insert) | |
1755 | { | |
1756 | const char *errmsg = NULL; | |
1757 | insn = (*operand->insert) (insn, operand, mods, | |
1758 | reg, (long) value, &errmsg); | |
1759 | if (errmsg != (const char *) NULL) | |
1760 | { | |
1761 | last_errmsg = errmsg; | |
1762 | if (operand->flags & ARC_OPERAND_ERROR) | |
1763 | { | |
1764 | as_bad (errmsg); | |
1765 | return; | |
1766 | } | |
1767 | else if (operand->flags & ARC_OPERAND_WARN) | |
1768 | as_warn (errmsg); | |
1769 | break; | |
1770 | } | |
1771 | } | |
1772 | else | |
1773 | insn |= (value & ((1 << operand->bits) - 1)) << operand->shift; | |
1774 | ||
1775 | ++syn; | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | /* If we're at the end of the syntax string, we're done. */ | |
1780 | /* FIXME: try to move this to a separate function. */ | |
1781 | if (*syn == '\0') | |
1782 | { | |
1783 | int i; | |
1784 | char *f; | |
1785 | long limm, limm_p; | |
1786 | ||
1787 | /* For the moment we assume a valid `str' can only contain blanks | |
1788 | now. IE: We needn't try again with a longer version of the | |
1789 | insn and it is assumed that longer versions of insns appear | |
1790 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
1791 | ||
1792 | while (ISSPACE (*str)) | |
1793 | ++str; | |
1794 | ||
1795 | if (!is_end_of_line[(unsigned char) *str]) | |
1796 | as_bad ("junk at end of line: `%s'", str); | |
1797 | ||
1798 | /* Is there a limm value? */ | |
1799 | limm_p = arc_opcode_limm_p (&limm); | |
1800 | ||
1801 | /* Perform various error and warning tests. */ | |
1802 | ||
1803 | { | |
1804 | static int in_delay_slot_p = 0; | |
1805 | static int prev_insn_needs_cc_nop_p = 0; | |
1806 | /* delay slot type seen */ | |
1807 | int delay_slot_type = ARC_DELAY_NONE; | |
1808 | /* conditional execution flag seen */ | |
1809 | int conditional = 0; | |
1810 | /* 1 if condition codes are being set */ | |
1811 | int cc_set_p = 0; | |
1812 | /* 1 if conditional branch, including `b' "branch always" */ | |
1813 | int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH; | |
1814 | ||
1815 | for (i = 0; i < num_suffixes; ++i) | |
1816 | { | |
1817 | switch (arc_operands[insn_suffixes[i]->type].fmt) | |
1818 | { | |
1819 | case 'n': | |
1820 | delay_slot_type = insn_suffixes[i]->value; | |
1821 | break; | |
1822 | case 'q': | |
1823 | conditional = insn_suffixes[i]->value; | |
1824 | break; | |
1825 | case 'f': | |
1826 | cc_set_p = 1; | |
1827 | break; | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | /* Putting an insn with a limm value in a delay slot is supposed to | |
1832 | be legal, but let's warn the user anyway. Ditto for 8 byte | |
1833 | jumps with delay slots. */ | |
1834 | if (in_delay_slot_p && limm_p) | |
1835 | as_warn ("8 byte instruction in delay slot"); | |
1836 | if (delay_slot_type != ARC_DELAY_NONE | |
1837 | && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */ | |
1838 | as_warn ("8 byte jump instruction with delay slot"); | |
1839 | in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p; | |
1840 | ||
1841 | /* Warn when a conditional branch immediately follows a set of | |
1842 | the condition codes. Note that this needn't be done if the | |
1843 | insn that sets the condition codes uses a limm. */ | |
1844 | if (cond_branch_p && conditional != 0 /* 0 = "always" */ | |
1845 | && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5) | |
1846 | as_warn ("conditional branch follows set of flags"); | |
1847 | prev_insn_needs_cc_nop_p = | |
1848 | /* FIXME: ??? not required: | |
1849 | (delay_slot_type != ARC_DELAY_NONE) && */ | |
1850 | cc_set_p && !limm_p; | |
1851 | } | |
1852 | ||
1853 | /* Write out the instruction. | |
1854 | It is important to fetch enough space in one call to `frag_more'. | |
1855 | We use (f - frag_now->fr_literal) to compute where we are and we | |
1856 | don't want frag_now to change between calls. */ | |
1857 | if (limm_p) | |
1858 | { | |
1859 | f = frag_more (8); | |
1860 | md_number_to_chars (f, insn, 4); | |
1861 | md_number_to_chars (f + 4, limm, 4); | |
1862 | dwarf2_emit_insn (8); | |
1863 | } | |
1864 | else if (limm_reloc_p) | |
1865 | /* We need a limm reloc, but the tables think we don't. */ | |
1866 | abort (); | |
1867 | else | |
1868 | { | |
1869 | f = frag_more (4); | |
1870 | md_number_to_chars (f, insn, 4); | |
1871 | dwarf2_emit_insn (4); | |
1872 | } | |
1873 | ||
1874 | /* Create any fixups. */ | |
1875 | for (i = 0; i < fc; ++i) | |
1876 | { | |
1877 | int op_type, reloc_type; | |
1878 | expressionS exptmp; | |
1879 | const struct arc_operand *operand; | |
1880 | ||
1881 | /* Create a fixup for this operand. | |
1882 | At this point we do not use a bfd_reloc_code_real_type for | |
1883 | operands residing in the insn, but instead just use the | |
1884 | operand index. This lets us easily handle fixups for any | |
1885 | operand type, although that is admittedly not a very exciting | |
55cf6793 | 1886 | feature. We pick a BFD reloc type in md_apply_fix. |
ea1562b3 NC |
1887 | |
1888 | Limm values (4 byte immediate "constants") must be treated | |
1889 | normally because they're not part of the actual insn word | |
1890 | and thus the insertion routines don't handle them. */ | |
1891 | ||
1892 | if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM) | |
1893 | { | |
1894 | /* Modify the fixup addend as required by the cpu. */ | |
1895 | fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn); | |
1896 | op_type = fixups[i].opindex; | |
1897 | /* FIXME: can we add this data to the operand table? */ | |
1898 | if (op_type == arc_operand_map['L'] | |
1899 | || op_type == arc_operand_map['s'] | |
1900 | || op_type == arc_operand_map['o'] | |
1901 | || op_type == arc_operand_map['O']) | |
1902 | reloc_type = BFD_RELOC_32; | |
1903 | else if (op_type == arc_operand_map['J']) | |
1904 | reloc_type = BFD_RELOC_ARC_B26; | |
1905 | else | |
1906 | abort (); | |
1907 | reloc_type = get_arc_exp_reloc_type (1, reloc_type, | |
1908 | &fixups[i].exp, | |
1909 | &exptmp); | |
1910 | } | |
1911 | else | |
1912 | { | |
1913 | op_type = get_arc_exp_reloc_type (0, fixups[i].opindex, | |
1914 | &fixups[i].exp, &exptmp); | |
1915 | reloc_type = op_type + (int) BFD_RELOC_UNUSED; | |
1916 | } | |
1917 | operand = &arc_operands[op_type]; | |
1918 | fix_new_exp (frag_now, | |
1919 | ((f - frag_now->fr_literal) | |
1920 | + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4, | |
1921 | &exptmp, | |
1922 | (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0, | |
1923 | (bfd_reloc_code_real_type) reloc_type); | |
1924 | } | |
1925 | return; | |
1926 | } | |
1927 | } | |
1928 | ||
1929 | if (NULL == last_errmsg) | |
1930 | as_bad ("bad instruction `%s'", start); | |
1931 | else | |
1932 | as_bad (last_errmsg); | |
1933 | } |