Commit | Line | Data |
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92df71f0 | 1 | /* Disassemble support for GDB. |
1bac305b AC |
2 | |
3 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. | |
92df71f0 FN |
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 "ui-out.h" | |
26 | #include "gdb_string.h" | |
92df71f0 | 27 | #include "disasm.h" |
810ecf9f | 28 | #include "gdbcore.h" |
a89aa300 | 29 | #include "dis-asm.h" |
92df71f0 FN |
30 | |
31 | /* Disassemble functions. | |
32 | FIXME: We should get rid of all the duplicate code in gdb that does | |
33 | the same thing: disassemble_command() and the gdbtk variation. */ | |
34 | ||
35 | /* This Structure is used to store line number information. | |
36 | We need a different sort of line table from the normal one cuz we can't | |
37 | depend upon implicit line-end pc's for lines to do the | |
38 | reordering in this function. */ | |
39 | ||
40 | struct dis_line_entry | |
41 | { | |
42 | int line; | |
43 | CORE_ADDR start_pc; | |
44 | CORE_ADDR end_pc; | |
45 | }; | |
46 | ||
810ecf9f AC |
47 | /* Like target_read_memory, but slightly different parameters. */ |
48 | static int | |
49 | dis_asm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int len, | |
a89aa300 | 50 | struct disassemble_info *info) |
810ecf9f AC |
51 | { |
52 | return target_read_memory (memaddr, (char *) myaddr, len); | |
53 | } | |
54 | ||
55 | /* Like memory_error with slightly different parameters. */ | |
56 | static void | |
a89aa300 AC |
57 | dis_asm_memory_error (int status, bfd_vma memaddr, |
58 | struct disassemble_info *info) | |
810ecf9f AC |
59 | { |
60 | memory_error (status, memaddr); | |
61 | } | |
62 | ||
63 | /* Like print_address with slightly different parameters. */ | |
64 | static void | |
65 | dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) | |
66 | { | |
67 | print_address (addr, info->stream); | |
68 | } | |
69 | ||
92df71f0 | 70 | static int |
bde58177 | 71 | compare_lines (const void *mle1p, const void *mle2p) |
92df71f0 FN |
72 | { |
73 | struct dis_line_entry *mle1, *mle2; | |
74 | int val; | |
75 | ||
76 | mle1 = (struct dis_line_entry *) mle1p; | |
77 | mle2 = (struct dis_line_entry *) mle2p; | |
78 | ||
79 | val = mle1->line - mle2->line; | |
80 | ||
81 | if (val != 0) | |
82 | return val; | |
83 | ||
84 | return mle1->start_pc - mle2->start_pc; | |
85 | } | |
86 | ||
87 | static int | |
a89aa300 | 88 | dump_insns (struct ui_out *uiout, struct disassemble_info * di, |
92df71f0 FN |
89 | CORE_ADDR low, CORE_ADDR high, |
90 | int how_many, struct ui_stream *stb) | |
91 | { | |
92 | int num_displayed = 0; | |
93 | CORE_ADDR pc; | |
94 | ||
95 | /* parts of the symbolic representation of the address */ | |
96 | int unmapped; | |
92df71f0 FN |
97 | int offset; |
98 | int line; | |
3b31d625 | 99 | struct cleanup *ui_out_chain; |
92df71f0 FN |
100 | |
101 | for (pc = low; pc < high;) | |
102 | { | |
1211bce3 EZ |
103 | char *filename = NULL; |
104 | char *name = NULL; | |
105 | ||
92df71f0 FN |
106 | QUIT; |
107 | if (how_many >= 0) | |
108 | { | |
109 | if (num_displayed >= how_many) | |
110 | break; | |
111 | else | |
112 | num_displayed++; | |
113 | } | |
3b31d625 | 114 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
92df71f0 FN |
115 | ui_out_field_core_addr (uiout, "address", pc); |
116 | ||
117 | if (!build_address_symbolic (pc, 0, &name, &offset, &filename, | |
118 | &line, &unmapped)) | |
119 | { | |
120 | /* We don't care now about line, filename and | |
121 | unmapped. But we might in the future. */ | |
122 | ui_out_text (uiout, " <"); | |
123 | ui_out_field_string (uiout, "func-name", name); | |
124 | ui_out_text (uiout, "+"); | |
125 | ui_out_field_int (uiout, "offset", offset); | |
126 | ui_out_text (uiout, ">:\t"); | |
127 | } | |
13adf674 DJ |
128 | else |
129 | ui_out_text (uiout, ":\t"); | |
130 | ||
92df71f0 FN |
131 | if (filename != NULL) |
132 | xfree (filename); | |
133 | if (name != NULL) | |
134 | xfree (name); | |
135 | ||
136 | ui_file_rewind (stb->stream); | |
137 | pc += TARGET_PRINT_INSN (pc, di); | |
138 | ui_out_field_stream (uiout, "inst", stb); | |
139 | ui_file_rewind (stb->stream); | |
3b31d625 | 140 | do_cleanups (ui_out_chain); |
92df71f0 FN |
141 | ui_out_text (uiout, "\n"); |
142 | } | |
143 | return num_displayed; | |
144 | } | |
145 | ||
146 | /* The idea here is to present a source-O-centric view of a | |
147 | function to the user. This means that things are presented | |
148 | in source order, with (possibly) out of order assembly | |
149 | immediately following. */ | |
150 | static void | |
151 | do_mixed_source_and_assembly (struct ui_out *uiout, | |
152 | struct disassemble_info *di, int nlines, | |
153 | struct linetable_entry *le, | |
154 | CORE_ADDR low, CORE_ADDR high, | |
155 | struct symtab *symtab, | |
156 | int how_many, struct ui_stream *stb) | |
157 | { | |
158 | int newlines = 0; | |
159 | struct dis_line_entry *mle; | |
160 | struct symtab_and_line sal; | |
161 | int i; | |
162 | int out_of_order = 0; | |
163 | int next_line = 0; | |
164 | CORE_ADDR pc; | |
165 | int num_displayed = 0; | |
3b31d625 | 166 | struct cleanup *ui_out_chain; |
92df71f0 FN |
167 | |
168 | mle = (struct dis_line_entry *) alloca (nlines | |
169 | * sizeof (struct dis_line_entry)); | |
170 | ||
171 | /* Copy linetable entries for this function into our data | |
172 | structure, creating end_pc's and setting out_of_order as | |
173 | appropriate. */ | |
174 | ||
175 | /* First, skip all the preceding functions. */ | |
176 | ||
177 | for (i = 0; i < nlines - 1 && le[i].pc < low; i++); | |
178 | ||
179 | /* Now, copy all entries before the end of this function. */ | |
180 | ||
181 | for (; i < nlines - 1 && le[i].pc < high; i++) | |
182 | { | |
183 | if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc) | |
184 | continue; /* Ignore duplicates */ | |
185 | ||
186 | /* Skip any end-of-function markers. */ | |
187 | if (le[i].line == 0) | |
188 | continue; | |
189 | ||
190 | mle[newlines].line = le[i].line; | |
191 | if (le[i].line > le[i + 1].line) | |
192 | out_of_order = 1; | |
193 | mle[newlines].start_pc = le[i].pc; | |
194 | mle[newlines].end_pc = le[i + 1].pc; | |
195 | newlines++; | |
196 | } | |
197 | ||
198 | /* If we're on the last line, and it's part of the function, | |
199 | then we need to get the end pc in a special way. */ | |
200 | ||
201 | if (i == nlines - 1 && le[i].pc < high) | |
202 | { | |
203 | mle[newlines].line = le[i].line; | |
204 | mle[newlines].start_pc = le[i].pc; | |
205 | sal = find_pc_line (le[i].pc, 0); | |
206 | mle[newlines].end_pc = sal.end; | |
207 | newlines++; | |
208 | } | |
209 | ||
210 | /* Now, sort mle by line #s (and, then by addresses within | |
211 | lines). */ | |
212 | ||
213 | if (out_of_order) | |
214 | qsort (mle, newlines, sizeof (struct dis_line_entry), compare_lines); | |
215 | ||
216 | /* Now, for each line entry, emit the specified lines (unless | |
217 | they have been emitted before), followed by the assembly code | |
218 | for that line. */ | |
219 | ||
3b31d625 | 220 | ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
92df71f0 FN |
221 | |
222 | for (i = 0; i < newlines; i++) | |
223 | { | |
3b31d625 EZ |
224 | struct cleanup *ui_out_tuple_chain = NULL; |
225 | struct cleanup *ui_out_list_chain = NULL; | |
92df71f0 | 226 | int close_list = 1; |
3b31d625 | 227 | |
92df71f0 FN |
228 | /* Print out everything from next_line to the current line. */ |
229 | if (mle[i].line >= next_line) | |
230 | { | |
231 | if (next_line != 0) | |
232 | { | |
233 | /* Just one line to print. */ | |
234 | if (next_line == mle[i].line) | |
235 | { | |
3b31d625 EZ |
236 | ui_out_tuple_chain |
237 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
238 | "src_and_asm_line"); | |
92df71f0 FN |
239 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); |
240 | } | |
241 | else | |
242 | { | |
243 | /* Several source lines w/o asm instructions associated. */ | |
244 | for (; next_line < mle[i].line; next_line++) | |
245 | { | |
3b31d625 EZ |
246 | struct cleanup *ui_out_list_chain_line; |
247 | struct cleanup *ui_out_tuple_chain_line; | |
248 | ||
249 | ui_out_tuple_chain_line | |
250 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
251 | "src_and_asm_line"); | |
92df71f0 FN |
252 | print_source_lines (symtab, next_line, next_line + 1, |
253 | 0); | |
3b31d625 EZ |
254 | ui_out_list_chain_line |
255 | = make_cleanup_ui_out_list_begin_end (uiout, | |
256 | "line_asm_insn"); | |
257 | do_cleanups (ui_out_list_chain_line); | |
258 | do_cleanups (ui_out_tuple_chain_line); | |
92df71f0 FN |
259 | } |
260 | /* Print the last line and leave list open for | |
261 | asm instructions to be added. */ | |
3b31d625 EZ |
262 | ui_out_tuple_chain |
263 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
264 | "src_and_asm_line"); | |
92df71f0 FN |
265 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); |
266 | } | |
267 | } | |
268 | else | |
269 | { | |
3b31d625 EZ |
270 | ui_out_tuple_chain |
271 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
92df71f0 FN |
272 | print_source_lines (symtab, mle[i].line, mle[i].line + 1, 0); |
273 | } | |
274 | ||
275 | next_line = mle[i].line + 1; | |
3b31d625 EZ |
276 | ui_out_list_chain |
277 | = make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
92df71f0 FN |
278 | /* Don't close the list if the lines are not in order. */ |
279 | if (i < (newlines - 1) && mle[i + 1].line <= mle[i].line) | |
280 | close_list = 0; | |
281 | } | |
282 | ||
283 | num_displayed += dump_insns (uiout, di, mle[i].start_pc, mle[i].end_pc, | |
284 | how_many, stb); | |
285 | if (close_list) | |
286 | { | |
3b31d625 EZ |
287 | do_cleanups (ui_out_list_chain); |
288 | do_cleanups (ui_out_tuple_chain); | |
92df71f0 FN |
289 | ui_out_text (uiout, "\n"); |
290 | close_list = 0; | |
291 | } | |
292 | if (how_many >= 0) | |
293 | if (num_displayed >= how_many) | |
294 | break; | |
295 | } | |
3b31d625 | 296 | do_cleanups (ui_out_chain); |
92df71f0 FN |
297 | } |
298 | ||
299 | ||
300 | static void | |
a89aa300 | 301 | do_assembly_only (struct ui_out *uiout, struct disassemble_info * di, |
92df71f0 FN |
302 | CORE_ADDR low, CORE_ADDR high, |
303 | int how_many, struct ui_stream *stb) | |
304 | { | |
305 | int num_displayed = 0; | |
3b31d625 | 306 | struct cleanup *ui_out_chain; |
92df71f0 | 307 | |
3b31d625 | 308 | ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
92df71f0 FN |
309 | |
310 | num_displayed = dump_insns (uiout, di, low, high, how_many, stb); | |
311 | ||
3b31d625 | 312 | do_cleanups (ui_out_chain); |
92df71f0 FN |
313 | } |
314 | ||
92bf2b80 AC |
315 | /* Initialize the disassemble info struct ready for the specified |
316 | stream. */ | |
317 | ||
242e8be5 AC |
318 | static int |
319 | fprintf_disasm (void *stream, const char *format, ...) | |
320 | { | |
321 | va_list args; | |
322 | va_start (args, format); | |
323 | vfprintf_filtered (stream, format, args); | |
324 | va_end (args); | |
325 | /* Something non -ve. */ | |
326 | return 0; | |
327 | } | |
328 | ||
a89aa300 | 329 | static struct disassemble_info |
92bf2b80 | 330 | gdb_disassemble_info (struct gdbarch *gdbarch, struct ui_file *file) |
92df71f0 | 331 | { |
a89aa300 | 332 | struct disassemble_info di; |
242e8be5 | 333 | init_disassemble_info (&di, file, fprintf_disasm); |
2b6fd0d8 AC |
334 | di.flavour = bfd_target_unknown_flavour; |
335 | di.memory_error_func = dis_asm_memory_error; | |
336 | di.print_address_func = dis_asm_print_address; | |
337 | /* NOTE: cagney/2003-04-28: The original code, from the old Insight | |
338 | disassembler had a local optomization here. By default it would | |
339 | access the executable file, instead of the target memory (there | |
ce2826aa | 340 | was a growing list of exceptions though). Unfortunately, the |
2b6fd0d8 AC |
341 | heuristic was flawed. Commands like "disassemble &variable" |
342 | didn't work as they relied on the access going to the target. | |
343 | Further, it has been supperseeded by trust-read-only-sections | |
344 | (although that should be superseeded by target_trust..._p()). */ | |
345 | di.read_memory_func = dis_asm_read_memory; | |
22b0d388 | 346 | di.arch = gdbarch_bfd_arch_info (gdbarch)->arch; |
92bf2b80 AC |
347 | di.mach = gdbarch_bfd_arch_info (gdbarch)->mach; |
348 | di.endian = gdbarch_byte_order (gdbarch); | |
349 | return di; | |
350 | } | |
351 | ||
352 | void | |
353 | gdb_disassembly (struct ui_out *uiout, | |
354 | char *file_string, | |
355 | int line_num, | |
356 | int mixed_source_and_assembly, | |
357 | int how_many, CORE_ADDR low, CORE_ADDR high) | |
358 | { | |
359 | struct ui_stream *stb = ui_out_stream_new (uiout); | |
360 | struct cleanup *cleanups = make_cleanup_ui_out_stream_delete (stb); | |
a89aa300 | 361 | struct disassemble_info di = gdb_disassemble_info (current_gdbarch, stb->stream); |
92bf2b80 AC |
362 | /* To collect the instruction outputted from opcodes. */ |
363 | struct symtab *symtab = NULL; | |
364 | struct linetable_entry *le = NULL; | |
365 | int nlines = -1; | |
92df71f0 | 366 | |
92df71f0 FN |
367 | /* Assume symtab is valid for whole PC range */ |
368 | symtab = find_pc_symtab (low); | |
369 | ||
370 | if (symtab != NULL && symtab->linetable != NULL) | |
371 | { | |
372 | /* Convert the linetable to a bunch of my_line_entry's. */ | |
373 | le = symtab->linetable->item; | |
374 | nlines = symtab->linetable->nitems; | |
375 | } | |
376 | ||
377 | if (!mixed_source_and_assembly || nlines <= 0 | |
378 | || symtab == NULL || symtab->linetable == NULL) | |
379 | do_assembly_only (uiout, &di, low, high, how_many, stb); | |
380 | ||
381 | else if (mixed_source_and_assembly) | |
382 | do_mixed_source_and_assembly (uiout, &di, nlines, le, low, | |
383 | high, symtab, how_many, stb); | |
384 | ||
2b6fd0d8 | 385 | do_cleanups (cleanups); |
92df71f0 FN |
386 | gdb_flush (gdb_stdout); |
387 | } | |
810ecf9f | 388 | |
92bf2b80 AC |
389 | /* Print the instruction at address MEMADDR in debugged memory, |
390 | on STREAM. Returns length of the instruction, in bytes. */ | |
391 | ||
392 | int | |
393 | gdb_print_insn (CORE_ADDR memaddr, struct ui_file *stream) | |
394 | { | |
a89aa300 | 395 | struct disassemble_info di = gdb_disassemble_info (current_gdbarch, stream); |
92bf2b80 AC |
396 | return TARGET_PRINT_INSN (memaddr, &di); |
397 | } |