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fb40c209 AC |
1 | /* MI Command Set - disassemble commands. |
2 | Copyright (C) 2000, Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Solutions. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "target.h" | |
24 | #include "value.h" | |
25 | #include "mi-cmds.h" | |
26 | #include "mi-getopt.h" | |
27 | #include "ui-out.h" | |
28 | ||
ff844c8d | 29 | static int gdb_dis_asm_read_memory (bfd_vma memaddr, bfd_byte * myaddr, unsigned int len, |
fb40c209 AC |
30 | disassemble_info * info); |
31 | static int compare_lines (const PTR mle1p, const PTR mle2p); | |
32 | ||
33 | /* Disassemble functions. FIXME: these do not really belong here. We | |
34 | should get rid of all the duplicate code in gdb that does the same | |
35 | thing: disassemble_command() and the gdbtk variation. */ | |
36 | ||
37 | /* This Structure is used in mi_cmd_disassemble. | |
38 | We need a different sort of line table from the normal one cuz we can't | |
39 | depend upon implicit line-end pc's for lines to do the | |
40 | reordering in this function. */ | |
41 | ||
42 | struct dis_line_entry | |
43 | { | |
44 | int line; | |
45 | CORE_ADDR start_pc; | |
46 | CORE_ADDR end_pc; | |
47 | }; | |
48 | ||
49 | /* This variable determines where memory used for disassembly is read from. */ | |
50 | int gdb_disassemble_from_exec = -1; | |
51 | ||
52 | /* This is the memory_read_func for gdb_disassemble when we are | |
53 | disassembling from the exec file. */ | |
54 | static int | |
ff844c8d AC |
55 | gdb_dis_asm_read_memory (bfd_vma memaddr, bfd_byte * myaddr, |
56 | unsigned int len, disassemble_info * info) | |
fb40c209 AC |
57 | { |
58 | extern struct target_ops exec_ops; | |
59 | int res; | |
60 | ||
61 | errno = 0; | |
62 | res = xfer_memory (memaddr, myaddr, len, 0, &exec_ops); | |
63 | ||
64 | if (res == len) | |
65 | return 0; | |
66 | else if (errno == 0) | |
67 | return EIO; | |
68 | else | |
69 | return errno; | |
70 | } | |
71 | ||
72 | static int | |
73 | compare_lines (const PTR mle1p, const PTR mle2p) | |
74 | { | |
75 | struct dis_line_entry *mle1, *mle2; | |
76 | int val; | |
77 | ||
78 | mle1 = (struct dis_line_entry *) mle1p; | |
79 | mle2 = (struct dis_line_entry *) mle2p; | |
80 | ||
81 | val = mle1->line - mle2->line; | |
82 | ||
83 | if (val != 0) | |
84 | return val; | |
85 | ||
86 | return mle1->start_pc - mle2->start_pc; | |
87 | } | |
88 | ||
89 | /* The arguments to be passed on the command line and parsed here are: | |
90 | ||
91 | either: | |
92 | ||
93 | START-ADDRESS: address to start the disassembly at. | |
94 | END-ADDRESS: address to end the disassembly at. | |
95 | ||
96 | or: | |
97 | ||
98 | FILENAME: The name of the file where we want disassemble from. | |
99 | LINE: The line around which we want to disassemble. It will | |
100 | disassemble the function that contins that line. | |
101 | HOW_MANY: Number of disassembly lines to display. In mixed mode, it | |
102 | is the number of disassembly lines only, not counting the source | |
103 | lines. | |
104 | ||
105 | always required: | |
106 | ||
107 | MODE: 0 or 1 for disassembly only, or mixed source and disassembly, | |
108 | respectively. */ | |
109 | ||
110 | enum mi_cmd_result | |
111 | mi_cmd_disassemble (char *command, char **argv, int argc) | |
112 | { | |
113 | CORE_ADDR pc; | |
114 | CORE_ADDR start; | |
115 | CORE_ADDR low = 0; | |
116 | CORE_ADDR high = 0; | |
117 | ||
118 | int how_many = -1; | |
119 | int mixed_source_and_assembly; | |
120 | int num_displayed; | |
121 | int line_num; | |
122 | ||
123 | char *file_string; | |
124 | static disassemble_info di; | |
125 | static int di_initialized; | |
126 | ||
127 | struct symtab *s; | |
128 | ||
129 | /* To collect the instruction outputted from opcodes. */ | |
130 | static struct ui_stream *stb = NULL; | |
131 | ||
132 | /* parts of the symbolic representation of the address */ | |
133 | int line; | |
134 | int offset; | |
135 | int unmapped; | |
136 | char *filename = NULL; | |
137 | char *name = NULL; | |
138 | ||
139 | /* Which options have we processed? */ | |
140 | int file_seen = 0; | |
141 | int line_seen = 0; | |
142 | int num_seen = 0; | |
143 | int start_seen = 0; | |
144 | int end_seen = 0; | |
145 | ||
146 | /* Options processing stuff. */ | |
147 | int optind = 0; | |
148 | char *optarg; | |
149 | enum opt | |
150 | { | |
151 | FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT | |
152 | }; | |
153 | static struct mi_opt opts[] = | |
154 | { | |
155 | {"f", FILE_OPT, 1}, | |
156 | {"l", LINE_OPT, 1}, | |
157 | {"n", NUM_OPT, 1}, | |
158 | {"s", START_OPT, 1}, | |
159 | {"e", END_OPT, 1}, | |
160 | 0 | |
161 | }; | |
162 | ||
163 | /* Get the options with their arguments. Keep track of what we | |
164 | encountered. */ | |
165 | while (1) | |
166 | { | |
167 | int opt = mi_getopt ("mi_cmd_disassemble", argc, argv, opts, | |
168 | &optind, &optarg); | |
169 | if (opt < 0) | |
170 | break; | |
171 | switch ((enum opt) opt) | |
172 | { | |
173 | case FILE_OPT: | |
174 | file_string = xstrdup (optarg); | |
175 | file_seen = 1; | |
176 | break; | |
177 | case LINE_OPT: | |
178 | line_num = atoi (optarg); | |
179 | line_seen = 1; | |
180 | break; | |
181 | case NUM_OPT: | |
182 | how_many = atoi (optarg); | |
183 | num_seen = 1; | |
184 | break; | |
185 | case START_OPT: | |
186 | low = parse_and_eval_address (optarg); | |
187 | start_seen = 1; | |
188 | break; | |
189 | case END_OPT: | |
190 | high = parse_and_eval_address (optarg); | |
191 | end_seen = 1; | |
192 | break; | |
193 | } | |
194 | } | |
195 | argv += optind; | |
196 | argc -= optind; | |
197 | ||
198 | /* Allow only filename + linenum (with how_many which is not | |
199 | required) OR start_addr + and_addr */ | |
200 | ||
201 | if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen) | |
202 | || (line_seen && file_seen && !num_seen && !start_seen && !end_seen) | |
203 | || (!line_seen && !file_seen && !num_seen && start_seen && end_seen))) | |
204 | error ("mi_cmd_disassemble: Usage: ( [-f filename -l linenum [-n howmany]] | [-s startaddr -e endaddr]) [--] mixed_mode."); | |
205 | ||
206 | if (argc != 1) | |
207 | error ("mi_cmd_disassemble: Usage: [-f filename -l linenum [-n howmany]] [-s startaddr -e endaddr] [--] mixed_mode."); | |
208 | ||
209 | mixed_source_and_assembly = atoi (argv[0]); | |
210 | if ((mixed_source_and_assembly != 0) && (mixed_source_and_assembly != 1)) | |
211 | error ("mi_cmd_disassemble: Mixed_mode argument must be 0 or 1."); | |
212 | ||
213 | /* We must get the function beginning and end where line_num is | |
214 | contained. */ | |
215 | ||
216 | if (line_seen && file_seen) | |
217 | { | |
218 | s = lookup_symtab (file_string); | |
219 | if (s == NULL) | |
220 | error ("mi_cmd_disassemble: Invalid filename."); | |
221 | if (!find_line_pc (s, line_num, &start)) | |
222 | error ("mi_cmd_disassemble: Invalid line number"); | |
223 | if (find_pc_partial_function (start, NULL, &low, &high) == 0) | |
224 | error ("mi_cmd_disassemble: No function contains specified address"); | |
225 | } | |
226 | ||
227 | if (!di_initialized) | |
228 | { | |
229 | /* We don't add a cleanup for this, because the allocation of | |
230 | the stream is done once only for each gdb run, and we need to | |
231 | keep it around until the end. Hopefully there won't be any | |
232 | errors in the init code below, that make this function bail | |
233 | out. */ | |
234 | stb = ui_out_stream_new (uiout); | |
235 | INIT_DISASSEMBLE_INFO_NO_ARCH (di, stb->stream, | |
236 | (fprintf_ftype) fprintf_unfiltered); | |
237 | di.flavour = bfd_target_unknown_flavour; | |
238 | di.memory_error_func = dis_asm_memory_error; | |
239 | di.print_address_func = dis_asm_print_address; | |
240 | di_initialized = 1; | |
241 | } | |
242 | ||
243 | di.mach = TARGET_PRINT_INSN_INFO->mach; | |
244 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
245 | di.endian = BFD_ENDIAN_BIG; | |
246 | else | |
247 | di.endian = BFD_ENDIAN_LITTLE; | |
248 | ||
249 | /* If gdb_disassemble_from_exec == -1, then we use the following heuristic to | |
250 | determine whether or not to do disassembly from target memory or from the | |
251 | exec file: | |
252 | ||
253 | If we're debugging a local process, read target memory, instead of the | |
254 | exec file. This makes disassembly of functions in shared libs work | |
255 | correctly. Also, read target memory if we are debugging native threads. | |
256 | ||
257 | Else, we're debugging a remote process, and should disassemble from the | |
258 | exec file for speed. However, this is no good if the target modifies its | |
259 | code (for relocation, or whatever). | |
260 | */ | |
261 | ||
262 | if (gdb_disassemble_from_exec == -1) | |
263 | { | |
264 | if (strcmp (target_shortname, "child") == 0 | |
265 | || strcmp (target_shortname, "procfs") == 0 | |
266 | || strcmp (target_shortname, "vxprocess") == 0 | |
267 | || strstr (target_shortname, "-threads") != NULL) | |
268 | gdb_disassemble_from_exec = 0; /* It's a child process, read inferior mem */ | |
269 | else | |
270 | gdb_disassemble_from_exec = 1; /* It's remote, read the exec file */ | |
271 | } | |
272 | ||
273 | if (gdb_disassemble_from_exec) | |
274 | di.read_memory_func = gdb_dis_asm_read_memory; | |
275 | else | |
276 | di.read_memory_func = dis_asm_read_memory; | |
277 | ||
278 | /* If just doing straight assembly, all we need to do is disassemble | |
279 | everything between low and high. If doing mixed source/assembly, | |
280 | we've got a totally different path to follow. */ | |
281 | ||
282 | if (mixed_source_and_assembly) | |
283 | { | |
284 | /* Come here for mixed source/assembly */ | |
285 | /* The idea here is to present a source-O-centric view of a | |
286 | function to the user. This means that things are presented | |
287 | in source order, with (possibly) out of order assembly | |
288 | immediately following. */ | |
289 | struct symtab *symtab; | |
290 | struct linetable_entry *le; | |
291 | int nlines; | |
292 | int newlines; | |
293 | struct dis_line_entry *mle; | |
294 | struct symtab_and_line sal; | |
295 | int i; | |
296 | int out_of_order; | |
297 | int next_line; | |
298 | ||
299 | /* Assume symtab is valid for whole PC range */ | |
300 | symtab = find_pc_symtab (low); | |
301 | ||
302 | if (!symtab || !symtab->linetable) | |
303 | goto assembly_only; | |
304 | ||
305 | /* First, convert the linetable to a bunch of my_line_entry's. */ | |
306 | ||
307 | le = symtab->linetable->item; | |
308 | nlines = symtab->linetable->nitems; | |
309 | ||
310 | if (nlines <= 0) | |
311 | goto assembly_only; | |
312 | ||
313 | mle = (struct dis_line_entry *) alloca (nlines * sizeof (struct dis_line_entry)); | |
314 | ||
315 | out_of_order = 0; | |
316 | ||
317 | /* Copy linetable entries for this function into our data | |
318 | structure, creating end_pc's and setting out_of_order as | |
319 | appropriate. */ | |
320 | ||
321 | /* First, skip all the preceding functions. */ | |
322 | ||
323 | for (i = 0; i < nlines - 1 && le[i].pc < low; i++); | |
324 | ||
325 | /* Now, copy all entries before the end of this function. */ | |
326 | ||
327 | newlines = 0; | |
328 | for (; i < nlines - 1 && le[i].pc < high; i++) | |
329 | { | |
330 | if (le[i].line == le[i + 1].line | |
331 | && le[i].pc == le[i + 1].pc) | |
332 | continue; /* Ignore duplicates */ | |
333 | ||
334 | mle[newlines].line = le[i].line; | |
335 | if (le[i].line > le[i + 1].line) | |
336 | out_of_order = 1; | |
337 | mle[newlines].start_pc = le[i].pc; | |
338 | mle[newlines].end_pc = le[i + 1].pc; | |
339 | newlines++; | |
340 | } | |
341 | ||
342 | /* If we're on the last line, and it's part of the function, | |
343 | then we need to get the end pc in a special way. */ | |
344 | ||
345 | if (i == nlines - 1 | |
346 | && le[i].pc < high) | |
347 | { | |
348 | mle[newlines].line = le[i].line; | |
349 | mle[newlines].start_pc = le[i].pc; | |
350 | sal = find_pc_line (le[i].pc, 0); | |
351 | mle[newlines].end_pc = sal.end; | |
352 | newlines++; | |
353 | } | |
354 | ||
355 | /* Now, sort mle by line #s (and, then by addresses within | |
356 | lines). */ | |
357 | ||
358 | if (out_of_order) | |
359 | qsort (mle, newlines, sizeof (struct dis_line_entry), compare_lines); | |
360 | ||
361 | /* Now, for each line entry, emit the specified lines (unless | |
362 | they have been emitted before), followed by the assembly code | |
363 | for that line. */ | |
364 | ||
365 | next_line = 0; /* Force out first line */ | |
366 | ui_out_list_begin (uiout, "asm_insns"); | |
367 | num_displayed = 0; | |
368 | for (i = 0; i < newlines; i++) | |
369 | { | |
370 | int close_list = 1; | |
371 | /* Print out everything from next_line to the current line. */ | |
372 | if (mle[i].line >= next_line) | |
373 | { | |
374 | if (next_line != 0) | |
375 | { | |
376 | /* Just one line to print. */ | |
377 | if (next_line == mle[i].line) | |
378 | { | |
379 | ui_out_list_begin (uiout, "src_and_asm_line"); | |
380 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); | |
381 | } | |
382 | else | |
383 | { | |
384 | /* Several source lines w/o asm instructions associated. */ | |
385 | for (; next_line < mle[i].line; next_line++) | |
386 | { | |
387 | ui_out_list_begin (uiout, "src_and_asm_line"); | |
388 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); | |
389 | ui_out_list_begin (uiout, "line_asm_insn"); | |
390 | ui_out_list_end (uiout); | |
391 | ui_out_list_end (uiout); | |
392 | } | |
393 | /* Print the last line and leave list open for | |
394 | asm instructions to be added. */ | |
395 | ui_out_list_begin (uiout, "src_and_asm_line"); | |
396 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); | |
397 | } | |
398 | } | |
399 | else | |
400 | { | |
401 | ui_out_list_begin (uiout, "src_and_asm_line"); | |
402 | print_source_lines (symtab, mle[i].line, mle[i].line + 1, 0); | |
403 | } | |
404 | ||
405 | next_line = mle[i].line + 1; | |
406 | ui_out_list_begin (uiout, "line_asm_insn"); | |
407 | if (i + 1 < newlines && mle[i + 1].line <= mle[i].line) | |
408 | close_list = 0; | |
409 | } | |
410 | for (pc = mle[i].start_pc; pc < mle[i].end_pc;) | |
411 | { | |
412 | QUIT; | |
413 | if (how_many >= 0) | |
414 | { | |
415 | if (num_displayed >= how_many) | |
416 | break; | |
417 | else | |
418 | num_displayed++; | |
419 | } | |
420 | ui_out_list_begin (uiout, NULL); | |
421 | print_address_numeric (pc, 1, stb->stream); | |
422 | ui_out_field_stream (uiout, "address", stb); | |
423 | ||
424 | if (!build_address_symbolic (pc, 0, &name, &offset, &filename, &line, &unmapped)) | |
425 | { | |
426 | /* We don't care now about line, filename and | |
427 | unmapped, but we might in the future. */ | |
428 | ui_out_field_string (uiout, "func-name", name); | |
429 | ui_out_field_int (uiout, "offset", offset); | |
430 | } | |
431 | if (filename != NULL) | |
432 | free (filename); | |
433 | if (name != NULL) | |
434 | free (name); | |
435 | ||
436 | ui_file_rewind (stb->stream); | |
437 | pc += (*tm_print_insn) (pc, &di); | |
438 | ui_out_field_stream (uiout, "inst", stb); | |
439 | ui_file_rewind (stb->stream); | |
440 | ui_out_list_end (uiout); | |
441 | } | |
442 | if (close_list) | |
443 | { | |
444 | ui_out_list_end (uiout); | |
445 | ui_out_list_end (uiout); | |
446 | close_list = 0; | |
447 | } | |
448 | if (how_many >= 0) | |
449 | if (num_displayed >= how_many) | |
450 | break; | |
451 | } | |
452 | ui_out_list_end (uiout); | |
453 | } | |
454 | else | |
455 | { | |
456 | assembly_only: | |
457 | ui_out_list_begin (uiout, "asm_insns"); | |
458 | num_displayed = 0; | |
459 | for (pc = low; pc < high;) | |
460 | { | |
461 | QUIT; | |
462 | if (how_many >= 0) | |
463 | { | |
464 | if (num_displayed >= how_many) | |
465 | break; | |
466 | else | |
467 | num_displayed++; | |
468 | } | |
469 | ui_out_list_begin (uiout, NULL); | |
470 | print_address_numeric (pc, 1, stb->stream); | |
471 | ui_out_field_stream (uiout, "address", stb); | |
472 | ||
473 | if (!build_address_symbolic (pc, 0, &name, &offset, &filename, &line, &unmapped)) | |
474 | { | |
475 | /* We don't care now about line, filename and | |
476 | unmapped. But we might in the future. */ | |
477 | ui_out_field_string (uiout, "func-name", name); | |
478 | ui_out_field_int (uiout, "offset", offset); | |
479 | } | |
480 | if (filename != NULL) | |
481 | free (filename); | |
482 | if (name != NULL) | |
483 | free (name); | |
484 | ||
485 | ui_file_rewind (stb->stream); | |
486 | pc += (*tm_print_insn) (pc, &di); | |
487 | ui_out_field_stream (uiout, "inst", stb); | |
488 | ui_file_rewind (stb->stream); | |
489 | ui_out_list_end (uiout); | |
490 | } | |
491 | ui_out_list_end (uiout); | |
492 | } | |
493 | gdb_flush (gdb_stdout); | |
494 | ||
495 | return MI_CMD_DONE; | |
496 | } | |
497 | ||
498 | /* Local variables: */ | |
499 | /* change-log-default-name: "ChangeLog-mi" */ | |
500 | /* End: */ |