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" |
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 | |
48 | dis_asm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int len, | |
49 | disassemble_info *info) | |
50 | { | |
51 | return target_read_memory (memaddr, (char *) myaddr, len); | |
52 | } | |
53 | ||
54 | /* Like memory_error with slightly different parameters. */ | |
55 | static void | |
56 | dis_asm_memory_error (int status, bfd_vma memaddr, disassemble_info *info) | |
57 | { | |
58 | memory_error (status, memaddr); | |
59 | } | |
60 | ||
61 | /* Like print_address with slightly different parameters. */ | |
62 | static void | |
63 | dis_asm_print_address (bfd_vma addr, struct disassemble_info *info) | |
64 | { | |
65 | print_address (addr, info->stream); | |
66 | } | |
67 | ||
92df71f0 | 68 | static int |
bde58177 | 69 | compare_lines (const void *mle1p, const void *mle2p) |
92df71f0 FN |
70 | { |
71 | struct dis_line_entry *mle1, *mle2; | |
72 | int val; | |
73 | ||
74 | mle1 = (struct dis_line_entry *) mle1p; | |
75 | mle2 = (struct dis_line_entry *) mle2p; | |
76 | ||
77 | val = mle1->line - mle2->line; | |
78 | ||
79 | if (val != 0) | |
80 | return val; | |
81 | ||
82 | return mle1->start_pc - mle2->start_pc; | |
83 | } | |
84 | ||
85 | static int | |
86 | dump_insns (struct ui_out *uiout, disassemble_info * di, | |
87 | CORE_ADDR low, CORE_ADDR high, | |
88 | int how_many, struct ui_stream *stb) | |
89 | { | |
90 | int num_displayed = 0; | |
91 | CORE_ADDR pc; | |
92 | ||
93 | /* parts of the symbolic representation of the address */ | |
94 | int unmapped; | |
92df71f0 FN |
95 | int offset; |
96 | int line; | |
3b31d625 | 97 | struct cleanup *ui_out_chain; |
92df71f0 FN |
98 | |
99 | for (pc = low; pc < high;) | |
100 | { | |
1211bce3 EZ |
101 | char *filename = NULL; |
102 | char *name = NULL; | |
103 | ||
92df71f0 FN |
104 | QUIT; |
105 | if (how_many >= 0) | |
106 | { | |
107 | if (num_displayed >= how_many) | |
108 | break; | |
109 | else | |
110 | num_displayed++; | |
111 | } | |
3b31d625 | 112 | ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
92df71f0 FN |
113 | ui_out_field_core_addr (uiout, "address", pc); |
114 | ||
115 | if (!build_address_symbolic (pc, 0, &name, &offset, &filename, | |
116 | &line, &unmapped)) | |
117 | { | |
118 | /* We don't care now about line, filename and | |
119 | unmapped. But we might in the future. */ | |
120 | ui_out_text (uiout, " <"); | |
121 | ui_out_field_string (uiout, "func-name", name); | |
122 | ui_out_text (uiout, "+"); | |
123 | ui_out_field_int (uiout, "offset", offset); | |
124 | ui_out_text (uiout, ">:\t"); | |
125 | } | |
13adf674 DJ |
126 | else |
127 | ui_out_text (uiout, ":\t"); | |
128 | ||
92df71f0 FN |
129 | if (filename != NULL) |
130 | xfree (filename); | |
131 | if (name != NULL) | |
132 | xfree (name); | |
133 | ||
134 | ui_file_rewind (stb->stream); | |
135 | pc += TARGET_PRINT_INSN (pc, di); | |
136 | ui_out_field_stream (uiout, "inst", stb); | |
137 | ui_file_rewind (stb->stream); | |
3b31d625 | 138 | do_cleanups (ui_out_chain); |
92df71f0 FN |
139 | ui_out_text (uiout, "\n"); |
140 | } | |
141 | return num_displayed; | |
142 | } | |
143 | ||
144 | /* The idea here is to present a source-O-centric view of a | |
145 | function to the user. This means that things are presented | |
146 | in source order, with (possibly) out of order assembly | |
147 | immediately following. */ | |
148 | static void | |
149 | do_mixed_source_and_assembly (struct ui_out *uiout, | |
150 | struct disassemble_info *di, int nlines, | |
151 | struct linetable_entry *le, | |
152 | CORE_ADDR low, CORE_ADDR high, | |
153 | struct symtab *symtab, | |
154 | int how_many, struct ui_stream *stb) | |
155 | { | |
156 | int newlines = 0; | |
157 | struct dis_line_entry *mle; | |
158 | struct symtab_and_line sal; | |
159 | int i; | |
160 | int out_of_order = 0; | |
161 | int next_line = 0; | |
162 | CORE_ADDR pc; | |
163 | int num_displayed = 0; | |
3b31d625 | 164 | struct cleanup *ui_out_chain; |
92df71f0 FN |
165 | |
166 | mle = (struct dis_line_entry *) alloca (nlines | |
167 | * sizeof (struct dis_line_entry)); | |
168 | ||
169 | /* Copy linetable entries for this function into our data | |
170 | structure, creating end_pc's and setting out_of_order as | |
171 | appropriate. */ | |
172 | ||
173 | /* First, skip all the preceding functions. */ | |
174 | ||
175 | for (i = 0; i < nlines - 1 && le[i].pc < low; i++); | |
176 | ||
177 | /* Now, copy all entries before the end of this function. */ | |
178 | ||
179 | for (; i < nlines - 1 && le[i].pc < high; i++) | |
180 | { | |
181 | if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc) | |
182 | continue; /* Ignore duplicates */ | |
183 | ||
184 | /* Skip any end-of-function markers. */ | |
185 | if (le[i].line == 0) | |
186 | continue; | |
187 | ||
188 | mle[newlines].line = le[i].line; | |
189 | if (le[i].line > le[i + 1].line) | |
190 | out_of_order = 1; | |
191 | mle[newlines].start_pc = le[i].pc; | |
192 | mle[newlines].end_pc = le[i + 1].pc; | |
193 | newlines++; | |
194 | } | |
195 | ||
196 | /* If we're on the last line, and it's part of the function, | |
197 | then we need to get the end pc in a special way. */ | |
198 | ||
199 | if (i == nlines - 1 && le[i].pc < high) | |
200 | { | |
201 | mle[newlines].line = le[i].line; | |
202 | mle[newlines].start_pc = le[i].pc; | |
203 | sal = find_pc_line (le[i].pc, 0); | |
204 | mle[newlines].end_pc = sal.end; | |
205 | newlines++; | |
206 | } | |
207 | ||
208 | /* Now, sort mle by line #s (and, then by addresses within | |
209 | lines). */ | |
210 | ||
211 | if (out_of_order) | |
212 | qsort (mle, newlines, sizeof (struct dis_line_entry), compare_lines); | |
213 | ||
214 | /* Now, for each line entry, emit the specified lines (unless | |
215 | they have been emitted before), followed by the assembly code | |
216 | for that line. */ | |
217 | ||
3b31d625 | 218 | ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
92df71f0 FN |
219 | |
220 | for (i = 0; i < newlines; i++) | |
221 | { | |
3b31d625 EZ |
222 | struct cleanup *ui_out_tuple_chain = NULL; |
223 | struct cleanup *ui_out_list_chain = NULL; | |
92df71f0 | 224 | int close_list = 1; |
3b31d625 | 225 | |
92df71f0 FN |
226 | /* Print out everything from next_line to the current line. */ |
227 | if (mle[i].line >= next_line) | |
228 | { | |
229 | if (next_line != 0) | |
230 | { | |
231 | /* Just one line to print. */ | |
232 | if (next_line == mle[i].line) | |
233 | { | |
3b31d625 EZ |
234 | ui_out_tuple_chain |
235 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
236 | "src_and_asm_line"); | |
92df71f0 FN |
237 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); |
238 | } | |
239 | else | |
240 | { | |
241 | /* Several source lines w/o asm instructions associated. */ | |
242 | for (; next_line < mle[i].line; next_line++) | |
243 | { | |
3b31d625 EZ |
244 | struct cleanup *ui_out_list_chain_line; |
245 | struct cleanup *ui_out_tuple_chain_line; | |
246 | ||
247 | ui_out_tuple_chain_line | |
248 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
249 | "src_and_asm_line"); | |
92df71f0 FN |
250 | print_source_lines (symtab, next_line, next_line + 1, |
251 | 0); | |
3b31d625 EZ |
252 | ui_out_list_chain_line |
253 | = make_cleanup_ui_out_list_begin_end (uiout, | |
254 | "line_asm_insn"); | |
255 | do_cleanups (ui_out_list_chain_line); | |
256 | do_cleanups (ui_out_tuple_chain_line); | |
92df71f0 FN |
257 | } |
258 | /* Print the last line and leave list open for | |
259 | asm instructions to be added. */ | |
3b31d625 EZ |
260 | ui_out_tuple_chain |
261 | = make_cleanup_ui_out_tuple_begin_end (uiout, | |
262 | "src_and_asm_line"); | |
92df71f0 FN |
263 | print_source_lines (symtab, next_line, mle[i].line + 1, 0); |
264 | } | |
265 | } | |
266 | else | |
267 | { | |
3b31d625 EZ |
268 | ui_out_tuple_chain |
269 | = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line"); | |
92df71f0 FN |
270 | print_source_lines (symtab, mle[i].line, mle[i].line + 1, 0); |
271 | } | |
272 | ||
273 | next_line = mle[i].line + 1; | |
3b31d625 EZ |
274 | ui_out_list_chain |
275 | = make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn"); | |
92df71f0 FN |
276 | /* Don't close the list if the lines are not in order. */ |
277 | if (i < (newlines - 1) && mle[i + 1].line <= mle[i].line) | |
278 | close_list = 0; | |
279 | } | |
280 | ||
281 | num_displayed += dump_insns (uiout, di, mle[i].start_pc, mle[i].end_pc, | |
282 | how_many, stb); | |
283 | if (close_list) | |
284 | { | |
3b31d625 EZ |
285 | do_cleanups (ui_out_list_chain); |
286 | do_cleanups (ui_out_tuple_chain); | |
92df71f0 FN |
287 | ui_out_text (uiout, "\n"); |
288 | close_list = 0; | |
289 | } | |
290 | if (how_many >= 0) | |
291 | if (num_displayed >= how_many) | |
292 | break; | |
293 | } | |
3b31d625 | 294 | do_cleanups (ui_out_chain); |
92df71f0 FN |
295 | } |
296 | ||
297 | ||
298 | static void | |
299 | do_assembly_only (struct ui_out *uiout, disassemble_info * di, | |
300 | CORE_ADDR low, CORE_ADDR high, | |
301 | int how_many, struct ui_stream *stb) | |
302 | { | |
303 | int num_displayed = 0; | |
3b31d625 | 304 | struct cleanup *ui_out_chain; |
92df71f0 | 305 | |
3b31d625 | 306 | ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns"); |
92df71f0 FN |
307 | |
308 | num_displayed = dump_insns (uiout, di, low, high, how_many, stb); | |
309 | ||
3b31d625 | 310 | do_cleanups (ui_out_chain); |
92df71f0 FN |
311 | } |
312 | ||
92bf2b80 AC |
313 | /* Initialize the disassemble info struct ready for the specified |
314 | stream. */ | |
315 | ||
316 | static disassemble_info | |
317 | gdb_disassemble_info (struct gdbarch *gdbarch, struct ui_file *file) | |
92df71f0 | 318 | { |
2b6fd0d8 | 319 | disassemble_info di; |
92bf2b80 | 320 | INIT_DISASSEMBLE_INFO_NO_ARCH (di, file, |
3c23e6fb | 321 | (fprintf_ftype) fprintf_filtered); |
2b6fd0d8 AC |
322 | di.flavour = bfd_target_unknown_flavour; |
323 | di.memory_error_func = dis_asm_memory_error; | |
324 | di.print_address_func = dis_asm_print_address; | |
325 | /* NOTE: cagney/2003-04-28: The original code, from the old Insight | |
326 | disassembler had a local optomization here. By default it would | |
327 | access the executable file, instead of the target memory (there | |
328 | was a growing list of exceptions though). Unfortunatly, the | |
329 | heuristic was flawed. Commands like "disassemble &variable" | |
330 | didn't work as they relied on the access going to the target. | |
331 | Further, it has been supperseeded by trust-read-only-sections | |
332 | (although that should be superseeded by target_trust..._p()). */ | |
333 | di.read_memory_func = dis_asm_read_memory; | |
22b0d388 | 334 | di.arch = gdbarch_bfd_arch_info (gdbarch)->arch; |
92bf2b80 AC |
335 | di.mach = gdbarch_bfd_arch_info (gdbarch)->mach; |
336 | di.endian = gdbarch_byte_order (gdbarch); | |
337 | return di; | |
338 | } | |
339 | ||
340 | void | |
341 | gdb_disassembly (struct ui_out *uiout, | |
342 | char *file_string, | |
343 | int line_num, | |
344 | int mixed_source_and_assembly, | |
345 | int how_many, CORE_ADDR low, CORE_ADDR high) | |
346 | { | |
347 | struct ui_stream *stb = ui_out_stream_new (uiout); | |
348 | struct cleanup *cleanups = make_cleanup_ui_out_stream_delete (stb); | |
349 | disassemble_info di = gdb_disassemble_info (current_gdbarch, stb->stream); | |
350 | /* To collect the instruction outputted from opcodes. */ | |
351 | struct symtab *symtab = NULL; | |
352 | struct linetable_entry *le = NULL; | |
353 | int nlines = -1; | |
92df71f0 | 354 | |
92df71f0 FN |
355 | /* Assume symtab is valid for whole PC range */ |
356 | symtab = find_pc_symtab (low); | |
357 | ||
358 | if (symtab != NULL && symtab->linetable != NULL) | |
359 | { | |
360 | /* Convert the linetable to a bunch of my_line_entry's. */ | |
361 | le = symtab->linetable->item; | |
362 | nlines = symtab->linetable->nitems; | |
363 | } | |
364 | ||
365 | if (!mixed_source_and_assembly || nlines <= 0 | |
366 | || symtab == NULL || symtab->linetable == NULL) | |
367 | do_assembly_only (uiout, &di, low, high, how_many, stb); | |
368 | ||
369 | else if (mixed_source_and_assembly) | |
370 | do_mixed_source_and_assembly (uiout, &di, nlines, le, low, | |
371 | high, symtab, how_many, stb); | |
372 | ||
2b6fd0d8 | 373 | do_cleanups (cleanups); |
92df71f0 FN |
374 | gdb_flush (gdb_stdout); |
375 | } | |
810ecf9f | 376 | |
92bf2b80 AC |
377 | /* Print the instruction at address MEMADDR in debugged memory, |
378 | on STREAM. Returns length of the instruction, in bytes. */ | |
379 | ||
380 | int | |
381 | gdb_print_insn (CORE_ADDR memaddr, struct ui_file *stream) | |
382 | { | |
383 | disassemble_info di = gdb_disassemble_info (current_gdbarch, stream); | |
384 | return TARGET_PRINT_INSN (memaddr, &di); | |
385 | } | |
386 | ||
810ecf9f AC |
387 | \f |
388 | /* FIXME: cagney/2003-04-28: This global deprecated_tm_print_insn_info | |
389 | is going away. */ | |
390 | disassemble_info deprecated_tm_print_insn_info; | |
391 | ||
392 | extern void _initialize_disasm (void); | |
393 | ||
394 | void | |
395 | _initialize_disasm (void) | |
396 | { | |
92bf2b80 | 397 | |
810ecf9f AC |
398 | INIT_DISASSEMBLE_INFO_NO_ARCH (deprecated_tm_print_insn_info, gdb_stdout, |
399 | (fprintf_ftype)fprintf_filtered); | |
400 | deprecated_tm_print_insn_info.flavour = bfd_target_unknown_flavour; | |
401 | deprecated_tm_print_insn_info.read_memory_func = dis_asm_read_memory; | |
402 | deprecated_tm_print_insn_info.memory_error_func = dis_asm_memory_error; | |
403 | deprecated_tm_print_insn_info.print_address_func = dis_asm_print_address; | |
404 | } |