1 /* Disassemble support for GDB.
3 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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. */
26 #include "gdb_string.h"
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. */
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. */
46 /* Like target_read_memory, but slightly different parameters. */
48 dis_asm_read_memory (bfd_vma memaddr, bfd_byte *myaddr, unsigned int len,
49 disassemble_info *info)
51 return target_read_memory (memaddr, (char *) myaddr, len);
54 /* Like memory_error with slightly different parameters. */
56 dis_asm_memory_error (int status, bfd_vma memaddr, disassemble_info *info)
58 memory_error (status, memaddr);
61 /* Like print_address with slightly different parameters. */
63 dis_asm_print_address (bfd_vma addr, struct disassemble_info *info)
65 print_address (addr, info->stream);
69 compare_lines (const void *mle1p, const void *mle2p)
71 struct dis_line_entry *mle1, *mle2;
74 mle1 = (struct dis_line_entry *) mle1p;
75 mle2 = (struct dis_line_entry *) mle2p;
77 val = mle1->line - mle2->line;
82 return mle1->start_pc - mle2->start_pc;
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)
90 int num_displayed = 0;
93 /* parts of the symbolic representation of the address */
97 struct cleanup *ui_out_chain;
99 for (pc = low; pc < high;)
101 char *filename = NULL;
107 if (num_displayed >= how_many)
112 ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
113 ui_out_field_core_addr (uiout, "address", pc);
115 if (!build_address_symbolic (pc, 0, &name, &offset, &filename,
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");
126 if (filename != NULL)
131 ui_file_rewind (stb->stream);
132 pc += TARGET_PRINT_INSN (pc, di);
133 ui_out_field_stream (uiout, "inst", stb);
134 ui_file_rewind (stb->stream);
135 do_cleanups (ui_out_chain);
136 ui_out_text (uiout, "\n");
138 return num_displayed;
141 /* The idea here is to present a source-O-centric view of a
142 function to the user. This means that things are presented
143 in source order, with (possibly) out of order assembly
144 immediately following. */
146 do_mixed_source_and_assembly (struct ui_out *uiout,
147 struct disassemble_info *di, int nlines,
148 struct linetable_entry *le,
149 CORE_ADDR low, CORE_ADDR high,
150 struct symtab *symtab,
151 int how_many, struct ui_stream *stb)
154 struct dis_line_entry *mle;
155 struct symtab_and_line sal;
157 int out_of_order = 0;
160 int num_displayed = 0;
161 struct cleanup *ui_out_chain;
163 mle = (struct dis_line_entry *) alloca (nlines
164 * sizeof (struct dis_line_entry));
166 /* Copy linetable entries for this function into our data
167 structure, creating end_pc's and setting out_of_order as
170 /* First, skip all the preceding functions. */
172 for (i = 0; i < nlines - 1 && le[i].pc < low; i++);
174 /* Now, copy all entries before the end of this function. */
176 for (; i < nlines - 1 && le[i].pc < high; i++)
178 if (le[i].line == le[i + 1].line && le[i].pc == le[i + 1].pc)
179 continue; /* Ignore duplicates */
181 /* Skip any end-of-function markers. */
185 mle[newlines].line = le[i].line;
186 if (le[i].line > le[i + 1].line)
188 mle[newlines].start_pc = le[i].pc;
189 mle[newlines].end_pc = le[i + 1].pc;
193 /* If we're on the last line, and it's part of the function,
194 then we need to get the end pc in a special way. */
196 if (i == nlines - 1 && le[i].pc < high)
198 mle[newlines].line = le[i].line;
199 mle[newlines].start_pc = le[i].pc;
200 sal = find_pc_line (le[i].pc, 0);
201 mle[newlines].end_pc = sal.end;
205 /* Now, sort mle by line #s (and, then by addresses within
209 qsort (mle, newlines, sizeof (struct dis_line_entry), compare_lines);
211 /* Now, for each line entry, emit the specified lines (unless
212 they have been emitted before), followed by the assembly code
215 ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns");
217 for (i = 0; i < newlines; i++)
219 struct cleanup *ui_out_tuple_chain = NULL;
220 struct cleanup *ui_out_list_chain = NULL;
223 /* Print out everything from next_line to the current line. */
224 if (mle[i].line >= next_line)
228 /* Just one line to print. */
229 if (next_line == mle[i].line)
232 = make_cleanup_ui_out_tuple_begin_end (uiout,
234 print_source_lines (symtab, next_line, mle[i].line + 1, 0);
238 /* Several source lines w/o asm instructions associated. */
239 for (; next_line < mle[i].line; next_line++)
241 struct cleanup *ui_out_list_chain_line;
242 struct cleanup *ui_out_tuple_chain_line;
244 ui_out_tuple_chain_line
245 = make_cleanup_ui_out_tuple_begin_end (uiout,
247 print_source_lines (symtab, next_line, next_line + 1,
249 ui_out_list_chain_line
250 = make_cleanup_ui_out_list_begin_end (uiout,
252 do_cleanups (ui_out_list_chain_line);
253 do_cleanups (ui_out_tuple_chain_line);
255 /* Print the last line and leave list open for
256 asm instructions to be added. */
258 = make_cleanup_ui_out_tuple_begin_end (uiout,
260 print_source_lines (symtab, next_line, mle[i].line + 1, 0);
266 = make_cleanup_ui_out_tuple_begin_end (uiout, "src_and_asm_line");
267 print_source_lines (symtab, mle[i].line, mle[i].line + 1, 0);
270 next_line = mle[i].line + 1;
272 = make_cleanup_ui_out_list_begin_end (uiout, "line_asm_insn");
273 /* Don't close the list if the lines are not in order. */
274 if (i < (newlines - 1) && mle[i + 1].line <= mle[i].line)
278 num_displayed += dump_insns (uiout, di, mle[i].start_pc, mle[i].end_pc,
282 do_cleanups (ui_out_list_chain);
283 do_cleanups (ui_out_tuple_chain);
284 ui_out_text (uiout, "\n");
288 if (num_displayed >= how_many)
291 do_cleanups (ui_out_chain);
296 do_assembly_only (struct ui_out *uiout, disassemble_info * di,
297 CORE_ADDR low, CORE_ADDR high,
298 int how_many, struct ui_stream *stb)
300 int num_displayed = 0;
301 struct cleanup *ui_out_chain;
303 ui_out_chain = make_cleanup_ui_out_list_begin_end (uiout, "asm_insns");
305 num_displayed = dump_insns (uiout, di, low, high, how_many, stb);
307 do_cleanups (ui_out_chain);
311 gdb_disassembly (struct ui_out *uiout,
314 int mixed_source_and_assembly,
315 int how_many, CORE_ADDR low, CORE_ADDR high)
317 struct ui_stream *stb = ui_out_stream_new (uiout);
318 struct cleanup *cleanups = make_cleanup_ui_out_stream_delete (stb);
320 /* To collect the instruction outputted from opcodes. */
321 struct symtab *symtab = NULL;
322 struct linetable_entry *le = NULL;
325 INIT_DISASSEMBLE_INFO_NO_ARCH (di, stb->stream,
326 (fprintf_ftype) fprintf_unfiltered);
327 di.flavour = bfd_target_unknown_flavour;
328 di.memory_error_func = dis_asm_memory_error;
329 di.print_address_func = dis_asm_print_address;
330 /* NOTE: cagney/2003-04-28: The original code, from the old Insight
331 disassembler had a local optomization here. By default it would
332 access the executable file, instead of the target memory (there
333 was a growing list of exceptions though). Unfortunatly, the
334 heuristic was flawed. Commands like "disassemble &variable"
335 didn't work as they relied on the access going to the target.
336 Further, it has been supperseeded by trust-read-only-sections
337 (although that should be superseeded by target_trust..._p()). */
338 di.read_memory_func = dis_asm_read_memory;
339 di.mach = gdbarch_bfd_arch_info (current_gdbarch)->mach;
340 di.endian = gdbarch_byte_order (current_gdbarch);
342 /* Assume symtab is valid for whole PC range */
343 symtab = find_pc_symtab (low);
345 if (symtab != NULL && symtab->linetable != NULL)
347 /* Convert the linetable to a bunch of my_line_entry's. */
348 le = symtab->linetable->item;
349 nlines = symtab->linetable->nitems;
352 if (!mixed_source_and_assembly || nlines <= 0
353 || symtab == NULL || symtab->linetable == NULL)
354 do_assembly_only (uiout, &di, low, high, how_many, stb);
356 else if (mixed_source_and_assembly)
357 do_mixed_source_and_assembly (uiout, &di, nlines, le, low,
358 high, symtab, how_many, stb);
360 do_cleanups (cleanups);
361 gdb_flush (gdb_stdout);
365 /* FIXME: cagney/2003-04-28: This global deprecated_tm_print_insn_info
367 disassemble_info deprecated_tm_print_insn_info;
369 extern void _initialize_disasm (void);
372 _initialize_disasm (void)
374 INIT_DISASSEMBLE_INFO_NO_ARCH (deprecated_tm_print_insn_info, gdb_stdout,
375 (fprintf_ftype)fprintf_filtered);
376 deprecated_tm_print_insn_info.flavour = bfd_target_unknown_flavour;
377 deprecated_tm_print_insn_info.read_memory_func = dis_asm_read_memory;
378 deprecated_tm_print_insn_info.memory_error_func = dis_asm_memory_error;
379 deprecated_tm_print_insn_info.print_address_func = dis_asm_print_address;