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79472b45 JM |
1 | /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */ |
2 | /* Disassembler interface for targets using CGEN. -*- C -*- | |
3 | CGEN: Cpu tools GENerator | |
4 | ||
5 | THIS FILE IS MACHINE GENERATED WITH CGEN. | |
6 | - the resultant file is machine generated, cgen-dis.in isn't | |
7 | ||
b3adc24a | 8 | Copyright (C) 1996-2020 Free Software Foundation, Inc. |
79472b45 JM |
9 | |
10 | This file is part of libopcodes. | |
11 | ||
12 | This library is free software; you can redistribute it and/or modify | |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 3, or (at your option) | |
15 | any later version. | |
16 | ||
17 | It is distributed in the hope that it will be useful, but WITHOUT | |
18 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
19 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
20 | License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software Foundation, Inc., | |
24 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ | |
25 | ||
26 | /* ??? Eventually more and more of this stuff can go to cpu-independent files. | |
27 | Keep that in mind. */ | |
28 | ||
29 | #include "sysdep.h" | |
30 | #include <stdio.h> | |
31 | #include "ansidecl.h" | |
32 | #include "disassemble.h" | |
33 | #include "bfd.h" | |
34 | #include "symcat.h" | |
35 | #include "libiberty.h" | |
36 | #include "bpf-desc.h" | |
37 | #include "bpf-opc.h" | |
38 | #include "opintl.h" | |
39 | ||
40 | /* Default text to print if an instruction isn't recognized. */ | |
41 | #define UNKNOWN_INSN_MSG _("*unknown*") | |
42 | ||
43 | static void print_normal | |
44 | (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int); | |
45 | static void print_address | |
46 | (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED; | |
47 | static void print_keyword | |
48 | (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED; | |
49 | static void print_insn_normal | |
50 | (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int); | |
51 | static int print_insn | |
52 | (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned); | |
53 | static int default_print_insn | |
54 | (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED; | |
55 | static int read_insn | |
56 | (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *, | |
57 | unsigned long *); | |
58 | \f | |
59 | /* -- disassembler routines inserted here. */ | |
60 | ||
61 | /* -- dis.c */ | |
62 | ||
63 | /* We need to customize the disassembler a bit: | |
64 | - Use 8 bytes per line by default. | |
65 | */ | |
66 | ||
67 | #define CGEN_PRINT_INSN bpf_print_insn | |
68 | ||
69 | static int | |
70 | bpf_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info) | |
71 | { | |
72 | bfd_byte buf[CGEN_MAX_INSN_SIZE]; | |
73 | int buflen; | |
74 | int status; | |
75 | ||
76 | info->bytes_per_chunk = 1; | |
77 | info->bytes_per_line = 8; | |
78c1c354 | 78 | info->endian_code = BFD_ENDIAN_BIG; |
79472b45 JM |
79 | |
80 | /* Attempt to read the base part of the insn. */ | |
81 | buflen = cd->base_insn_bitsize / 8; | |
82 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
83 | ||
84 | /* Try again with the minimum part, if min < base. */ | |
85 | if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) | |
86 | { | |
87 | buflen = cd->min_insn_bitsize / 8; | |
88 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
89 | } | |
90 | ||
91 | if (status != 0) | |
92 | { | |
93 | (*info->memory_error_func) (status, pc, info); | |
94 | return -1; | |
95 | } | |
96 | ||
97 | return print_insn (cd, pc, info, buf, buflen); | |
98 | } | |
99 | ||
100 | /* Signed immediates should be printed in hexadecimal. */ | |
101 | ||
102 | static void | |
103 | print_immediate (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, | |
104 | void *dis_info, | |
105 | int64_t value, | |
106 | unsigned int attrs ATTRIBUTE_UNUSED, | |
107 | bfd_vma pc ATTRIBUTE_UNUSED, | |
108 | int length ATTRIBUTE_UNUSED) | |
109 | { | |
110 | disassemble_info *info = (disassemble_info *) dis_info; | |
111 | ||
112 | if (value <= 9) | |
113 | (*info->fprintf_func) (info->stream, "%" PRId64, value); | |
114 | else | |
115 | (*info->fprintf_func) (info->stream, "%#" PRIx64, value); | |
116 | ||
117 | /* This is to avoid -Wunused-function for print_normal. */ | |
118 | if (0) | |
119 | print_normal (cd, dis_info, value, attrs, pc, length); | |
120 | } | |
121 | ||
122 | /* Endianness bit sizes should be printed in decimal. */ | |
123 | ||
124 | static void | |
125 | print_endsize (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, | |
126 | void *dis_info, | |
127 | unsigned long value, | |
128 | unsigned int attrs ATTRIBUTE_UNUSED, | |
129 | bfd_vma pc ATTRIBUTE_UNUSED, | |
130 | int length ATTRIBUTE_UNUSED) | |
131 | { | |
132 | disassemble_info *info = (disassemble_info *) dis_info; | |
133 | (*info->fprintf_func) (info->stream, "%lu", value); | |
134 | } | |
135 | ||
136 | \f | |
137 | /* -- */ | |
138 | ||
139 | void bpf_cgen_print_operand | |
140 | (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int); | |
141 | ||
142 | /* Main entry point for printing operands. | |
143 | XINFO is a `void *' and not a `disassemble_info *' to not put a requirement | |
144 | of dis-asm.h on cgen.h. | |
145 | ||
146 | This function is basically just a big switch statement. Earlier versions | |
147 | used tables to look up the function to use, but | |
148 | - if the table contains both assembler and disassembler functions then | |
149 | the disassembler contains much of the assembler and vice-versa, | |
150 | - there's a lot of inlining possibilities as things grow, | |
151 | - using a switch statement avoids the function call overhead. | |
152 | ||
153 | This function could be moved into `print_insn_normal', but keeping it | |
154 | separate makes clear the interface between `print_insn_normal' and each of | |
155 | the handlers. */ | |
156 | ||
157 | void | |
158 | bpf_cgen_print_operand (CGEN_CPU_DESC cd, | |
159 | int opindex, | |
160 | void * xinfo, | |
161 | CGEN_FIELDS *fields, | |
162 | void const *attrs ATTRIBUTE_UNUSED, | |
163 | bfd_vma pc, | |
164 | int length) | |
165 | { | |
166 | disassemble_info *info = (disassemble_info *) xinfo; | |
167 | ||
168 | switch (opindex) | |
169 | { | |
170 | case BPF_OPERAND_DISP16 : | |
171 | print_normal (cd, info, fields->f_offset16, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
172 | break; | |
173 | case BPF_OPERAND_DISP32 : | |
174 | print_normal (cd, info, fields->f_imm32, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
175 | break; | |
176 | case BPF_OPERAND_DSTBE : | |
177 | print_keyword (cd, info, & bpf_cgen_opval_h_gpr, fields->f_dstbe, 0); | |
178 | break; | |
179 | case BPF_OPERAND_DSTLE : | |
180 | print_keyword (cd, info, & bpf_cgen_opval_h_gpr, fields->f_dstle, 0); | |
181 | break; | |
182 | case BPF_OPERAND_ENDSIZE : | |
183 | print_endsize (cd, info, fields->f_imm32, 0, pc, length); | |
184 | break; | |
185 | case BPF_OPERAND_IMM32 : | |
186 | print_immediate (cd, info, fields->f_imm32, 0|(1<<CGEN_OPERAND_SIGNED), pc, length); | |
187 | break; | |
188 | case BPF_OPERAND_IMM64 : | |
189 | print_immediate (cd, info, fields->f_imm64, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_VIRTUAL), pc, length); | |
190 | break; | |
191 | case BPF_OPERAND_OFFSET16 : | |
192 | print_immediate (cd, info, fields->f_offset16, 0|(1<<CGEN_OPERAND_SIGNED), pc, length); | |
193 | break; | |
194 | case BPF_OPERAND_SRCBE : | |
195 | print_keyword (cd, info, & bpf_cgen_opval_h_gpr, fields->f_srcbe, 0); | |
196 | break; | |
197 | case BPF_OPERAND_SRCLE : | |
198 | print_keyword (cd, info, & bpf_cgen_opval_h_gpr, fields->f_srcle, 0); | |
199 | break; | |
200 | ||
201 | default : | |
202 | /* xgettext:c-format */ | |
203 | opcodes_error_handler | |
204 | (_("internal error: unrecognized field %d while printing insn"), | |
205 | opindex); | |
206 | abort (); | |
207 | } | |
208 | } | |
209 | ||
210 | cgen_print_fn * const bpf_cgen_print_handlers[] = | |
211 | { | |
212 | print_insn_normal, | |
213 | }; | |
214 | ||
215 | ||
216 | void | |
217 | bpf_cgen_init_dis (CGEN_CPU_DESC cd) | |
218 | { | |
219 | bpf_cgen_init_opcode_table (cd); | |
220 | bpf_cgen_init_ibld_table (cd); | |
221 | cd->print_handlers = & bpf_cgen_print_handlers[0]; | |
222 | cd->print_operand = bpf_cgen_print_operand; | |
223 | } | |
224 | ||
225 | \f | |
226 | /* Default print handler. */ | |
227 | ||
228 | static void | |
229 | print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, | |
230 | void *dis_info, | |
231 | long value, | |
232 | unsigned int attrs, | |
233 | bfd_vma pc ATTRIBUTE_UNUSED, | |
234 | int length ATTRIBUTE_UNUSED) | |
235 | { | |
236 | disassemble_info *info = (disassemble_info *) dis_info; | |
237 | ||
238 | /* Print the operand as directed by the attributes. */ | |
239 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
240 | ; /* nothing to do */ | |
241 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) | |
242 | (*info->fprintf_func) (info->stream, "%ld", value); | |
243 | else | |
244 | (*info->fprintf_func) (info->stream, "0x%lx", value); | |
245 | } | |
246 | ||
247 | /* Default address handler. */ | |
248 | ||
249 | static void | |
250 | print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, | |
251 | void *dis_info, | |
252 | bfd_vma value, | |
253 | unsigned int attrs, | |
254 | bfd_vma pc ATTRIBUTE_UNUSED, | |
255 | int length ATTRIBUTE_UNUSED) | |
256 | { | |
257 | disassemble_info *info = (disassemble_info *) dis_info; | |
258 | ||
259 | /* Print the operand as directed by the attributes. */ | |
260 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
261 | ; /* Nothing to do. */ | |
262 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) | |
263 | (*info->print_address_func) (value, info); | |
264 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) | |
265 | (*info->print_address_func) (value, info); | |
266 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) | |
267 | (*info->fprintf_func) (info->stream, "%ld", (long) value); | |
268 | else | |
269 | (*info->fprintf_func) (info->stream, "0x%lx", (long) value); | |
270 | } | |
271 | ||
272 | /* Keyword print handler. */ | |
273 | ||
274 | static void | |
275 | print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, | |
276 | void *dis_info, | |
277 | CGEN_KEYWORD *keyword_table, | |
278 | long value, | |
279 | unsigned int attrs ATTRIBUTE_UNUSED) | |
280 | { | |
281 | disassemble_info *info = (disassemble_info *) dis_info; | |
282 | const CGEN_KEYWORD_ENTRY *ke; | |
283 | ||
284 | ke = cgen_keyword_lookup_value (keyword_table, value); | |
285 | if (ke != NULL) | |
286 | (*info->fprintf_func) (info->stream, "%s", ke->name); | |
287 | else | |
288 | (*info->fprintf_func) (info->stream, "???"); | |
289 | } | |
290 | \f | |
291 | /* Default insn printer. | |
292 | ||
293 | DIS_INFO is defined as `void *' so the disassembler needn't know anything | |
294 | about disassemble_info. */ | |
295 | ||
296 | static void | |
297 | print_insn_normal (CGEN_CPU_DESC cd, | |
298 | void *dis_info, | |
299 | const CGEN_INSN *insn, | |
300 | CGEN_FIELDS *fields, | |
301 | bfd_vma pc, | |
302 | int length) | |
303 | { | |
304 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
305 | disassemble_info *info = (disassemble_info *) dis_info; | |
306 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
307 | ||
308 | CGEN_INIT_PRINT (cd); | |
309 | ||
310 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
311 | { | |
312 | if (CGEN_SYNTAX_MNEMONIC_P (*syn)) | |
313 | { | |
314 | (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); | |
315 | continue; | |
316 | } | |
317 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
318 | { | |
319 | (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); | |
320 | continue; | |
321 | } | |
322 | ||
323 | /* We have an operand. */ | |
324 | bpf_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, | |
325 | fields, CGEN_INSN_ATTRS (insn), pc, length); | |
326 | } | |
327 | } | |
328 | \f | |
329 | /* Subroutine of print_insn. Reads an insn into the given buffers and updates | |
330 | the extract info. | |
331 | Returns 0 if all is well, non-zero otherwise. */ | |
332 | ||
333 | static int | |
334 | read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, | |
335 | bfd_vma pc, | |
336 | disassemble_info *info, | |
337 | bfd_byte *buf, | |
338 | int buflen, | |
339 | CGEN_EXTRACT_INFO *ex_info, | |
340 | unsigned long *insn_value) | |
341 | { | |
342 | int status = (*info->read_memory_func) (pc, buf, buflen, info); | |
343 | ||
344 | if (status != 0) | |
345 | { | |
346 | (*info->memory_error_func) (status, pc, info); | |
347 | return -1; | |
348 | } | |
349 | ||
350 | ex_info->dis_info = info; | |
351 | ex_info->valid = (1 << buflen) - 1; | |
352 | ex_info->insn_bytes = buf; | |
353 | ||
354 | *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | /* Utility to print an insn. | |
359 | BUF is the base part of the insn, target byte order, BUFLEN bytes long. | |
360 | The result is the size of the insn in bytes or zero for an unknown insn | |
361 | or -1 if an error occurs fetching data (memory_error_func will have | |
362 | been called). */ | |
363 | ||
364 | static int | |
365 | print_insn (CGEN_CPU_DESC cd, | |
366 | bfd_vma pc, | |
367 | disassemble_info *info, | |
368 | bfd_byte *buf, | |
369 | unsigned int buflen) | |
370 | { | |
371 | CGEN_INSN_INT insn_value; | |
372 | const CGEN_INSN_LIST *insn_list; | |
373 | CGEN_EXTRACT_INFO ex_info; | |
374 | int basesize; | |
375 | ||
376 | /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ | |
377 | basesize = cd->base_insn_bitsize < buflen * 8 ? | |
378 | cd->base_insn_bitsize : buflen * 8; | |
379 | insn_value = cgen_get_insn_value (cd, buf, basesize); | |
380 | ||
381 | ||
382 | /* Fill in ex_info fields like read_insn would. Don't actually call | |
383 | read_insn, since the incoming buffer is already read (and possibly | |
384 | modified a la m32r). */ | |
385 | ex_info.valid = (1 << buflen) - 1; | |
386 | ex_info.dis_info = info; | |
387 | ex_info.insn_bytes = buf; | |
388 | ||
389 | /* The instructions are stored in hash lists. | |
390 | Pick the first one and keep trying until we find the right one. */ | |
391 | ||
392 | insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value); | |
393 | while (insn_list != NULL) | |
394 | { | |
395 | const CGEN_INSN *insn = insn_list->insn; | |
396 | CGEN_FIELDS fields; | |
397 | int length; | |
398 | unsigned long insn_value_cropped; | |
399 | ||
400 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
401 | /* Not needed as insn shouldn't be in hash lists if not supported. */ | |
402 | /* Supported by this cpu? */ | |
403 | if (! bpf_cgen_insn_supported (cd, insn)) | |
404 | { | |
405 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
406 | continue; | |
407 | } | |
408 | #endif | |
409 | ||
410 | /* Basic bit mask must be correct. */ | |
411 | /* ??? May wish to allow target to defer this check until the extract | |
412 | handler. */ | |
413 | ||
414 | /* Base size may exceed this instruction's size. Extract the | |
415 | relevant part from the buffer. */ | |
416 | if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen && | |
417 | (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) | |
418 | insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), | |
419 | info->endian == BFD_ENDIAN_BIG); | |
420 | else | |
421 | insn_value_cropped = insn_value; | |
422 | ||
423 | if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) | |
424 | == CGEN_INSN_BASE_VALUE (insn)) | |
425 | { | |
426 | /* Printing is handled in two passes. The first pass parses the | |
427 | machine insn and extracts the fields. The second pass prints | |
428 | them. */ | |
429 | ||
430 | /* Make sure the entire insn is loaded into insn_value, if it | |
431 | can fit. */ | |
432 | if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) && | |
433 | (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) | |
434 | { | |
435 | unsigned long full_insn_value; | |
436 | int rc = read_insn (cd, pc, info, buf, | |
437 | CGEN_INSN_BITSIZE (insn) / 8, | |
438 | & ex_info, & full_insn_value); | |
439 | if (rc != 0) | |
440 | return rc; | |
441 | length = CGEN_EXTRACT_FN (cd, insn) | |
442 | (cd, insn, &ex_info, full_insn_value, &fields, pc); | |
443 | } | |
444 | else | |
445 | length = CGEN_EXTRACT_FN (cd, insn) | |
446 | (cd, insn, &ex_info, insn_value_cropped, &fields, pc); | |
447 | ||
448 | /* Length < 0 -> error. */ | |
449 | if (length < 0) | |
450 | return length; | |
451 | if (length > 0) | |
452 | { | |
453 | CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length); | |
454 | /* Length is in bits, result is in bytes. */ | |
455 | return length / 8; | |
456 | } | |
457 | } | |
458 | ||
459 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
460 | } | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
465 | /* Default value for CGEN_PRINT_INSN. | |
466 | The result is the size of the insn in bytes or zero for an unknown insn | |
467 | or -1 if an error occured fetching bytes. */ | |
468 | ||
469 | #ifndef CGEN_PRINT_INSN | |
470 | #define CGEN_PRINT_INSN default_print_insn | |
471 | #endif | |
472 | ||
473 | static int | |
474 | default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info) | |
475 | { | |
476 | bfd_byte buf[CGEN_MAX_INSN_SIZE]; | |
477 | int buflen; | |
478 | int status; | |
479 | ||
480 | /* Attempt to read the base part of the insn. */ | |
481 | buflen = cd->base_insn_bitsize / 8; | |
482 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
483 | ||
484 | /* Try again with the minimum part, if min < base. */ | |
485 | if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) | |
486 | { | |
487 | buflen = cd->min_insn_bitsize / 8; | |
488 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
489 | } | |
490 | ||
491 | if (status != 0) | |
492 | { | |
493 | (*info->memory_error_func) (status, pc, info); | |
494 | return -1; | |
495 | } | |
496 | ||
497 | return print_insn (cd, pc, info, buf, buflen); | |
498 | } | |
499 | ||
500 | /* Main entry point. | |
501 | Print one instruction from PC on INFO->STREAM. | |
502 | Return the size of the instruction (in bytes). */ | |
503 | ||
504 | typedef struct cpu_desc_list | |
505 | { | |
506 | struct cpu_desc_list *next; | |
507 | CGEN_BITSET *isa; | |
508 | int mach; | |
509 | int endian; | |
510 | CGEN_CPU_DESC cd; | |
511 | } cpu_desc_list; | |
512 | ||
513 | int | |
514 | print_insn_bpf (bfd_vma pc, disassemble_info *info) | |
515 | { | |
516 | static cpu_desc_list *cd_list = 0; | |
517 | cpu_desc_list *cl = 0; | |
518 | static CGEN_CPU_DESC cd = 0; | |
519 | static CGEN_BITSET *prev_isa; | |
520 | static int prev_mach; | |
521 | static int prev_endian; | |
522 | int length; | |
523 | CGEN_BITSET *isa; | |
524 | int mach; | |
525 | int endian = (info->endian == BFD_ENDIAN_BIG | |
526 | ? CGEN_ENDIAN_BIG | |
527 | : CGEN_ENDIAN_LITTLE); | |
528 | enum bfd_architecture arch; | |
529 | ||
530 | /* ??? gdb will set mach but leave the architecture as "unknown" */ | |
531 | #ifndef CGEN_BFD_ARCH | |
532 | #define CGEN_BFD_ARCH bfd_arch_bpf | |
533 | #endif | |
534 | arch = info->arch; | |
535 | if (arch == bfd_arch_unknown) | |
536 | arch = CGEN_BFD_ARCH; | |
537 | ||
538 | /* There's no standard way to compute the machine or isa number | |
539 | so we leave it to the target. */ | |
540 | #ifdef CGEN_COMPUTE_MACH | |
541 | mach = CGEN_COMPUTE_MACH (info); | |
542 | #else | |
543 | mach = info->mach; | |
544 | #endif | |
545 | ||
546 | #ifdef CGEN_COMPUTE_ISA | |
547 | { | |
548 | static CGEN_BITSET *permanent_isa; | |
549 | ||
550 | if (!permanent_isa) | |
551 | permanent_isa = cgen_bitset_create (MAX_ISAS); | |
552 | isa = permanent_isa; | |
553 | cgen_bitset_clear (isa); | |
554 | cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info)); | |
555 | } | |
556 | #else | |
103ebbc3 | 557 | isa = info->private_data; |
79472b45 JM |
558 | #endif |
559 | ||
560 | /* If we've switched cpu's, try to find a handle we've used before */ | |
561 | if (cd | |
562 | && (cgen_bitset_compare (isa, prev_isa) != 0 | |
563 | || mach != prev_mach | |
564 | || endian != prev_endian)) | |
565 | { | |
566 | cd = 0; | |
567 | for (cl = cd_list; cl; cl = cl->next) | |
568 | { | |
569 | if (cgen_bitset_compare (cl->isa, isa) == 0 && | |
570 | cl->mach == mach && | |
571 | cl->endian == endian) | |
572 | { | |
573 | cd = cl->cd; | |
574 | prev_isa = cd->isas; | |
575 | break; | |
576 | } | |
577 | } | |
578 | } | |
579 | ||
580 | /* If we haven't initialized yet, initialize the opcode table. */ | |
581 | if (! cd) | |
582 | { | |
583 | const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach); | |
584 | const char *mach_name; | |
585 | ||
586 | if (!arch_type) | |
587 | abort (); | |
588 | mach_name = arch_type->printable_name; | |
589 | ||
590 | prev_isa = cgen_bitset_copy (isa); | |
591 | prev_mach = mach; | |
592 | prev_endian = endian; | |
593 | cd = bpf_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa, | |
594 | CGEN_CPU_OPEN_BFDMACH, mach_name, | |
595 | CGEN_CPU_OPEN_ENDIAN, prev_endian, | |
596 | CGEN_CPU_OPEN_END); | |
597 | if (!cd) | |
598 | abort (); | |
599 | ||
600 | /* Save this away for future reference. */ | |
601 | cl = xmalloc (sizeof (struct cpu_desc_list)); | |
602 | cl->cd = cd; | |
603 | cl->isa = prev_isa; | |
604 | cl->mach = mach; | |
605 | cl->endian = endian; | |
606 | cl->next = cd_list; | |
607 | cd_list = cl; | |
608 | ||
609 | bpf_cgen_init_dis (cd); | |
610 | } | |
611 | ||
612 | /* We try to have as much common code as possible. | |
613 | But at this point some targets need to take over. */ | |
614 | /* ??? Some targets may need a hook elsewhere. Try to avoid this, | |
615 | but if not possible try to move this hook elsewhere rather than | |
616 | have two hooks. */ | |
617 | length = CGEN_PRINT_INSN (cd, pc, info); | |
618 | if (length > 0) | |
619 | return length; | |
620 | if (length < 0) | |
621 | return -1; | |
622 | ||
623 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); | |
624 | return cd->default_insn_bitsize / 8; | |
625 | } |