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Commit | Line | Data |
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92df71f0 | 1 | /* Disassemble support for GDB. |
1bac305b | 2 | |
0fb0cc75 | 3 | Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009 |
bee0189a | 4 | Free Software Foundation, Inc. |
92df71f0 FN |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
92df71f0 FN |
11 | (at your option) any later version. |
12 | ||
13 | This program 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 | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
92df71f0 FN |
20 | |
21 | #include "defs.h" | |
22 | #include "target.h" | |
23 | #include "value.h" | |
24 | #include "ui-out.h" | |
25 | #include "gdb_string.h" | |
92df71f0 | 26 | #include "disasm.h" |
810ecf9f | 27 | #include "gdbcore.h" |
a89aa300 | 28 | #include "dis-asm.h" |
92df71f0 FN |
29 | |
30 | /* Disassemble functions. | |
31 | FIXME: We should get rid of all the duplicate code in gdb that does | |
32 | the same thing: disassemble_command() and the gdbtk variation. */ | |
33 | ||
34 | /* This Structure is used to store line number information. | |
35 | We need a different sort of line table from the normal one cuz we can't | |
36 | depend upon implicit line-end pc's for lines to do the | |
37 | reordering in this function. */ | |
38 | ||
39 | struct dis_line_entry | |
40 | { | |
41 | int line; | |
42 | CORE_ADDR start_pc; | |
43 | CORE_ADDR end_pc; | |
44 | }; | |
45 | ||
810ecf9f AC |
46 | /* Like target_read_memory, but slightly different parameters. */ |
47 | static int | |
1b0ba102 | 48 | dis_asm_read_memory (bfd_vma memaddr, gdb_byte *myaddr, unsigned int len, |
a89aa300 | 49 | struct disassemble_info *info) |
810ecf9f | 50 | { |
1b0ba102 | 51 | return target_read_memory (memaddr, myaddr, len); |
810ecf9f AC |
52 | } |
53 | ||
54 | /* Like memory_error with slightly different parameters. */ | |
55 | static void | |
a89aa300 AC |
56 | dis_asm_memory_error (int status, bfd_vma memaddr, |
57 | struct disassemble_info *info) | |
810ecf9f AC |
58 | { |
59 | memory_error (status, memaddr); | |
60 | } | |
61 | ||
62 | /* Like print_address with slightly different parameters. */ | |
63 | static void | |
64 | dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) | |
65 | { | |
5af949e3 UW |
66 | struct gdbarch *gdbarch = info->application_data; |
67 | print_address (gdbarch, addr, info->stream); | |
810ecf9f AC |
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 | |
13274fc3 UW |
88 | dump_insns (struct gdbarch *gdbarch, struct ui_out *uiout, |
89 | struct disassemble_info * di, | |
92df71f0 FN |
90 | CORE_ADDR low, CORE_ADDR high, |
91 | int how_many, struct ui_stream *stb) | |
92 | { | |
93 | int num_displayed = 0; | |
94 | CORE_ADDR pc; | |
95 | ||
96 | /* parts of the symbolic representation of the address */ | |
97 | int unmapped; | |
92df71f0 FN |
98 | int offset; |
99 | int line; | |
3b31d625 | 100 | struct cleanup *ui_out_chain; |
92df71f0 FN |
101 | |
102 | for (pc = low; pc < high;) | |
103 | { | |
1211bce3 EZ |
104 | char *filename = NULL; |
105 | char *name = NULL; | |
106 | ||
92df71f0 FN |
107 | QUIT; |
108 | if (how_many >= 0) | |
109 | { | |
110 | if (num_displayed >= how_many) | |
111 | break; | |
112 | else | |
113 | num_displayed++; | |
114 | } | |
3b31d625 | 115 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
5af949e3 | 116 | ui_out_field_core_addr (uiout, "address", gdbarch, pc); |
92df71f0 FN |
117 | |
118 | if (!build_address_symbolic (pc, 0, &name, &offset, &filename, | |
119 | &line, &unmapped)) | |
120 | { | |
121 | /* We don't care now about line, filename and | |
122 | unmapped. But we might in the future. */ | |
123 | ui_out_text (uiout, " <"); | |
124 | ui_out_field_string (uiout, "func-name", name); | |
125 | ui_out_text (uiout, "+"); | |
126 | ui_out_field_int (uiout, "offset", offset); | |
127 | ui_out_text (uiout, ">:\t"); | |
128 | } | |
13adf674 DJ |
129 | else |
130 | ui_out_text (uiout, ":\t"); | |
131 | ||
92df71f0 FN |
132 | if (filename != NULL) |
133 | xfree (filename); | |
134 | if (name != NULL) | |
135 | xfree (name); | |
136 | ||
137 | ui_file_rewind (stb->stream); | |
13274fc3 | 138 | pc += gdbarch_print_insn (gdbarch, pc, di); |
92df71f0 FN |
139 | ui_out_field_stream (uiout, "inst", stb); |
140 | ui_file_rewind (stb->stream); | |
3b31d625 | 141 | do_cleanups (ui_out_chain); |
92df71f0 FN |
142 | ui_out_text (uiout, "\n"); |
143 | } | |
144 | return num_displayed; | |
145 | } | |
146 | ||
147 | /* The idea here is to present a source-O-centric view of a | |
148 | function to the user. This means that things are presented | |
149 | in source order, with (possibly) out of order assembly | |
150 | immediately following. */ | |
151 | static void | |
13274fc3 | 152 | do_mixed_source_and_assembly (struct gdbarch *gdbarch, struct ui_out *uiout, |
92df71f0 FN |
153 | struct disassemble_info *di, int nlines, |
154 | struct linetable_entry *le, | |
155 | CORE_ADDR low, CORE_ADDR high, | |
156 | struct symtab *symtab, | |
157 | int how_many, struct ui_stream *stb) | |
158 | { | |
159 | int newlines = 0; | |
160 | struct dis_line_entry *mle; | |
161 | struct symtab_and_line sal; | |
162 | int i; | |
163 | int out_of_order = 0; | |
164 | int next_line = 0; | |
165 | CORE_ADDR pc; | |
166 | int num_displayed = 0; | |
3b31d625 | 167 | struct cleanup *ui_out_chain; |
0127c0d3 JJ |
168 | struct cleanup *ui_out_tuple_chain = make_cleanup (null_cleanup, 0); |
169 | struct cleanup *ui_out_list_chain = make_cleanup (null_cleanup, 0); | |
92df71f0 FN |
170 | |
171 | mle = (struct dis_line_entry *) alloca (nlines | |
172 | * sizeof (struct dis_line_entry)); | |
173 | ||
174 | /* Copy linetable entries for this function into our data | |
175 | structure, creating end_pc's and setting out_of_order as | |
176 | appropriate. */ | |
177 | ||
178 | /* First, skip all the preceding functions. */ | |
179 | ||
180 | for (i = 0; i < nlines - 1 && le[i].pc < low; i++); | |
181 | ||
182 | /* Now, copy all entries before the end of this function. */ | |
183 | ||
184 | for (; i < nlines - 1 && le[i].pc < high; i++) | |
185 | { | |
186 | if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc) | |
187 | continue; /* Ignore duplicates */ | |
188 | ||
189 | /* Skip any end-of-function markers. */ | |
190 | if (le[i].line == 0) | |
191 | continue; | |
192 | ||
193 | mle[newlines].line = le[i].line; | |
194 | if (le[i].line > le[i + 1].line) | |
195 | out_of_order = 1; | |
196 | mle[newlines].start_pc = le[i].pc; | |
197 | mle[newlines].end_pc = le[i + 1].pc; | |
198 | newlines++; | |
199 | } | |
200 | ||
201 | /* If we're on the last line, and it's part of the function, | |
202 | then we need to get the end pc in a special way. */ | |
203 | ||
204 | if (i == nlines - 1 && le[i].pc < high) | |
205 | { | |
206 | mle[newlines].line = le[i].line; | |
207 | mle[newlines].start_pc = le[i].pc; | |
208 | sal = find_pc_line (le[i].pc, 0); | |
209 | mle[newlines].end_pc = sal.end; | |
210 | newlines++; | |
211 | } | |
212 | ||
213 | /* Now, sort mle by line #s (and, then by addresses within | |
214 | lines). */ | |
215 | ||
216 | if (out_of_order) | |
217 | qsort (mle, newlines, sizeof (struct dis_line_entry), compare_lines); | |
218 | ||
219 | /* Now, for each line entry, emit the specified lines (unless | |
220 | they have been emitted before), followed by the assembly code | |
221 | for that line. */ | |
222 | ||
3b31d625 | 223 | ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
92df71f0 FN |
224 | |
225 | for (i = 0; i < newlines; i++) | |
226 | { | |
92df71f0 FN |
227 | /* Print out everything from next_line to the current line. */ |
228 | if (mle[i].line >= next_line) | |
229 | { | |
230 | if (next_line != 0) | |
231 | { | |
232 | /* Just one line to print. */ | |
233 | if (next_line == mle[i].line) | |
234 | { | |
3b31d625 EZ |
235 | ui_out_tuple_chain |
236 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
237 | "src_and_asm_line"); | |
92df71f0 FN |
238 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); |
239 | } | |
240 | else | |
241 | { | |
242 | /* Several source lines w/o asm instructions associated. */ | |
243 | for (; next_line < mle[i].line; next_line++) | |
244 | { | |
3b31d625 EZ |
245 | struct cleanup *ui_out_list_chain_line; |
246 | struct cleanup *ui_out_tuple_chain_line; | |
247 | ||
248 | ui_out_tuple_chain_line | |
249 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
250 | "src_and_asm_line"); | |
92df71f0 FN |
251 | print_source_lines (symtab, next_line, next_line + 1, |
252 | 0); | |
3b31d625 EZ |
253 | ui_out_list_chain_line |
254 | = make_cleanup_ui_out_list_begin_end (uiout, | |
255 | "line_asm_insn"); | |
256 | do_cleanups (ui_out_list_chain_line); | |
257 | do_cleanups (ui_out_tuple_chain_line); | |
92df71f0 FN |
258 | } |
259 | /* Print the last line and leave list open for | |
260 | asm instructions to be added. */ | |
3b31d625 EZ |
261 | ui_out_tuple_chain |
262 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
263 | "src_and_asm_line"); | |
92df71f0 FN |
264 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); |
265 | } | |
266 | } | |
267 | else | |
268 | { | |
3b31d625 EZ |
269 | ui_out_tuple_chain |
270 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
92df71f0 FN |
271 | print_source_lines (symtab, mle[i].line, mle[i].line + 1, 0); |
272 | } | |
273 | ||
274 | next_line = mle[i].line + 1; | |
3b31d625 EZ |
275 | ui_out_list_chain |
276 | = make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
92df71f0 FN |
277 | } |
278 | ||
13274fc3 UW |
279 | num_displayed += dump_insns (gdbarch, uiout, di, |
280 | mle[i].start_pc, mle[i].end_pc, | |
92df71f0 | 281 | how_many, stb); |
0127c0d3 JJ |
282 | |
283 | /* When we've reached the end of the mle array, or we've seen the last | |
284 | assembly range for this source line, close out the list/tuple. */ | |
285 | if (i == (newlines - 1) || mle[i + 1].line > mle[i].line) | |
92df71f0 | 286 | { |
3b31d625 EZ |
287 | do_cleanups (ui_out_list_chain); |
288 | do_cleanups (ui_out_tuple_chain); | |
0127c0d3 JJ |
289 | ui_out_tuple_chain = make_cleanup (null_cleanup, 0); |
290 | ui_out_list_chain = make_cleanup (null_cleanup, 0); | |
92df71f0 | 291 | ui_out_text (uiout, "\n"); |
92df71f0 | 292 | } |
0127c0d3 JJ |
293 | if (how_many >= 0 && num_displayed >= how_many) |
294 | break; | |
92df71f0 | 295 | } |
3b31d625 | 296 | do_cleanups (ui_out_chain); |
92df71f0 FN |
297 | } |
298 | ||
299 | ||
300 | static void | |
13274fc3 UW |
301 | do_assembly_only (struct gdbarch *gdbarch, struct ui_out *uiout, |
302 | struct disassemble_info * di, | |
92df71f0 FN |
303 | CORE_ADDR low, CORE_ADDR high, |
304 | int how_many, struct ui_stream *stb) | |
305 | { | |
306 | int num_displayed = 0; | |
3b31d625 | 307 | struct cleanup *ui_out_chain; |
92df71f0 | 308 | |
3b31d625 | 309 | ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
92df71f0 | 310 | |
13274fc3 | 311 | num_displayed = dump_insns (gdbarch, uiout, di, low, high, how_many, stb); |
92df71f0 | 312 | |
3b31d625 | 313 | do_cleanups (ui_out_chain); |
92df71f0 FN |
314 | } |
315 | ||
92bf2b80 AC |
316 | /* Initialize the disassemble info struct ready for the specified |
317 | stream. */ | |
318 | ||
bee0189a | 319 | static int ATTR_FORMAT (printf, 2, 3) |
242e8be5 AC |
320 | fprintf_disasm (void *stream, const char *format, ...) |
321 | { | |
322 | va_list args; | |
323 | va_start (args, format); | |
324 | vfprintf_filtered (stream, format, args); | |
325 | va_end (args); | |
326 | /* Something non -ve. */ | |
327 | return 0; | |
328 | } | |
329 | ||
a89aa300 | 330 | static struct disassemble_info |
92bf2b80 | 331 | gdb_disassemble_info (struct gdbarch *gdbarch, struct ui_file *file) |
92df71f0 | 332 | { |
a89aa300 | 333 | struct disassemble_info di; |
242e8be5 | 334 | init_disassemble_info (&di, file, fprintf_disasm); |
2b6fd0d8 AC |
335 | di.flavour = bfd_target_unknown_flavour; |
336 | di.memory_error_func = dis_asm_memory_error; | |
337 | di.print_address_func = dis_asm_print_address; | |
338 | /* NOTE: cagney/2003-04-28: The original code, from the old Insight | |
339 | disassembler had a local optomization here. By default it would | |
340 | access the executable file, instead of the target memory (there | |
ce2826aa | 341 | was a growing list of exceptions though). Unfortunately, the |
2b6fd0d8 AC |
342 | heuristic was flawed. Commands like "disassemble &variable" |
343 | didn't work as they relied on the access going to the target. | |
344 | Further, it has been supperseeded by trust-read-only-sections | |
345 | (although that should be superseeded by target_trust..._p()). */ | |
346 | di.read_memory_func = dis_asm_read_memory; | |
22b0d388 | 347 | di.arch = gdbarch_bfd_arch_info (gdbarch)->arch; |
92bf2b80 AC |
348 | di.mach = gdbarch_bfd_arch_info (gdbarch)->mach; |
349 | di.endian = gdbarch_byte_order (gdbarch); | |
9d4fde75 | 350 | di.endian_code = gdbarch_byte_order_for_code (gdbarch); |
5af949e3 | 351 | di.application_data = gdbarch; |
2877b4cc | 352 | disassemble_init_for_target (&di); |
92bf2b80 AC |
353 | return di; |
354 | } | |
355 | ||
356 | void | |
13274fc3 | 357 | gdb_disassembly (struct gdbarch *gdbarch, struct ui_out *uiout, |
92bf2b80 | 358 | char *file_string, |
92bf2b80 AC |
359 | int mixed_source_and_assembly, |
360 | int how_many, CORE_ADDR low, CORE_ADDR high) | |
361 | { | |
362 | struct ui_stream *stb = ui_out_stream_new (uiout); | |
363 | struct cleanup *cleanups = make_cleanup_ui_out_stream_delete (stb); | |
13274fc3 | 364 | struct disassemble_info di = gdb_disassemble_info (gdbarch, stb->stream); |
92bf2b80 AC |
365 | /* To collect the instruction outputted from opcodes. */ |
366 | struct symtab *symtab = NULL; | |
367 | struct linetable_entry *le = NULL; | |
368 | int nlines = -1; | |
92df71f0 | 369 | |
92df71f0 FN |
370 | /* Assume symtab is valid for whole PC range */ |
371 | symtab = find_pc_symtab (low); | |
372 | ||
373 | if (symtab != NULL && symtab->linetable != NULL) | |
374 | { | |
375 | /* Convert the linetable to a bunch of my_line_entry's. */ | |
376 | le = symtab->linetable->item; | |
377 | nlines = symtab->linetable->nitems; | |
378 | } | |
379 | ||
380 | if (!mixed_source_and_assembly || nlines <= 0 | |
381 | || symtab == NULL || symtab->linetable == NULL) | |
13274fc3 | 382 | do_assembly_only (gdbarch, uiout, &di, low, high, how_many, stb); |
92df71f0 FN |
383 | |
384 | else if (mixed_source_and_assembly) | |
13274fc3 | 385 | do_mixed_source_and_assembly (gdbarch, uiout, &di, nlines, le, low, |
92df71f0 FN |
386 | high, symtab, how_many, stb); |
387 | ||
2b6fd0d8 | 388 | do_cleanups (cleanups); |
92df71f0 FN |
389 | gdb_flush (gdb_stdout); |
390 | } | |
810ecf9f | 391 | |
92bf2b80 | 392 | /* Print the instruction at address MEMADDR in debugged memory, |
a4642986 MR |
393 | on STREAM. Returns the length of the instruction, in bytes, |
394 | and, if requested, the number of branch delay slot instructions. */ | |
92bf2b80 AC |
395 | |
396 | int | |
13274fc3 UW |
397 | gdb_print_insn (struct gdbarch *gdbarch, CORE_ADDR memaddr, |
398 | struct ui_file *stream, int *branch_delay_insns) | |
92bf2b80 | 399 | { |
a4642986 MR |
400 | struct disassemble_info di; |
401 | int length; | |
402 | ||
13274fc3 UW |
403 | di = gdb_disassemble_info (gdbarch, stream); |
404 | length = gdbarch_print_insn (gdbarch, memaddr, &di); | |
a4642986 MR |
405 | if (branch_delay_insns) |
406 | { | |
407 | if (di.insn_info_valid) | |
408 | *branch_delay_insns = di.branch_delay_insns; | |
409 | else | |
410 | *branch_delay_insns = 0; | |
411 | } | |
412 | return length; | |
92bf2b80 | 413 | } |