]>
Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* Disassembly display. |
f33c6cbf | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007 |
4 | Free Software Foundation, Inc. | |
f33c6cbf | 5 | |
f377b406 SC |
6 | Contributed by Hewlett-Packard Company. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
88d83552 EZ |
22 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
23 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "symtab.h" | |
27 | #include "breakpoint.h" | |
28 | #include "frame.h" | |
fd0407d6 | 29 | #include "value.h" |
52575520 | 30 | #include "source.h" |
f70a7d61 | 31 | #include "disasm.h" |
6d012f14 | 32 | #include "gdb_string.h" |
d7b2e967 AC |
33 | #include "tui/tui.h" |
34 | #include "tui/tui-data.h" | |
35 | #include "tui/tui-win.h" | |
36 | #include "tui/tui-layout.h" | |
37 | #include "tui/tui-winsource.h" | |
38 | #include "tui/tui-stack.h" | |
39 | #include "tui/tui-file.h" | |
c906108c | 40 | |
6a83354a | 41 | #include "gdb_curses.h" |
96ec9981 | 42 | |
aec2f747 SC |
43 | struct tui_asm_line |
44 | { | |
45 | CORE_ADDR addr; | |
5b6fe301 MS |
46 | char *addr_string; |
47 | char *insn; | |
aec2f747 SC |
48 | }; |
49 | ||
50 | /* Function to set the disassembly window's content. | |
51 | Disassemble count lines starting at pc. | |
52 | Return address of the count'th instruction after pc. */ | |
53 | static CORE_ADDR | |
08ef48c5 MS |
54 | tui_disassemble (struct tui_asm_line *asm_lines, |
55 | CORE_ADDR pc, int count) | |
aec2f747 SC |
56 | { |
57 | struct ui_file *gdb_dis_out; | |
c906108c | 58 | |
1cc6d956 | 59 | /* Now init the ui_file structure. */ |
aec2f747 SC |
60 | gdb_dis_out = tui_sfileopen (256); |
61 | ||
1cc6d956 | 62 | /* Now construct each line. */ |
4cfcaf21 | 63 | for (; count > 0; count--, asm_lines++) |
aec2f747 | 64 | { |
4cfcaf21 JB |
65 | if (asm_lines->addr_string) |
66 | xfree (asm_lines->addr_string); | |
67 | if (asm_lines->insn) | |
68 | xfree (asm_lines->insn); | |
aec2f747 SC |
69 | |
70 | print_address (pc, gdb_dis_out); | |
4cfcaf21 JB |
71 | asm_lines->addr = pc; |
72 | asm_lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
aec2f747 SC |
73 | |
74 | ui_file_rewind (gdb_dis_out); | |
75 | ||
a4642986 | 76 | pc = pc + gdb_print_insn (pc, gdb_dis_out, NULL); |
aec2f747 | 77 | |
4cfcaf21 | 78 | asm_lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); |
aec2f747 | 79 | |
1cc6d956 | 80 | /* Reset the buffer to empty. */ |
aec2f747 SC |
81 | ui_file_rewind (gdb_dis_out); |
82 | } | |
83 | ui_file_delete (gdb_dis_out); | |
84 | return pc; | |
85 | } | |
86 | ||
1cc6d956 MS |
87 | /* Find the disassembly address that corresponds to FROM lines above |
88 | or below the PC. Variable sized instructions are taken into | |
89 | account by the algorithm. */ | |
aec2f747 SC |
90 | static CORE_ADDR |
91 | tui_find_disassembly_address (CORE_ADDR pc, int from) | |
92 | { | |
d02c80cd | 93 | CORE_ADDR new_low; |
6ba8e26f | 94 | int max_lines; |
aec2f747 | 95 | int i; |
5b6fe301 | 96 | struct tui_asm_line *asm_lines; |
aec2f747 | 97 | |
6ba8e26f AC |
98 | max_lines = (from > 0) ? from : - from; |
99 | if (max_lines <= 1) | |
aec2f747 SC |
100 | return pc; |
101 | ||
4cfcaf21 | 102 | asm_lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
6ba8e26f | 103 | * max_lines); |
4cfcaf21 | 104 | memset (asm_lines, 0, sizeof (struct tui_asm_line) * max_lines); |
aec2f747 | 105 | |
6ba8e26f | 106 | new_low = pc; |
aec2f747 SC |
107 | if (from > 0) |
108 | { | |
4cfcaf21 JB |
109 | tui_disassemble (asm_lines, pc, max_lines); |
110 | new_low = asm_lines[max_lines - 1].addr; | |
aec2f747 SC |
111 | } |
112 | else | |
113 | { | |
114 | CORE_ADDR last_addr; | |
115 | int pos; | |
5b6fe301 | 116 | struct minimal_symbol *msymbol; |
aec2f747 | 117 | |
1cc6d956 MS |
118 | /* Find backward an address which is a symbol and for which |
119 | disassembling from that address will fill completely the | |
120 | window. */ | |
6ba8e26f | 121 | pos = max_lines - 1; |
aec2f747 | 122 | do { |
6ba8e26f AC |
123 | new_low -= 1 * max_lines; |
124 | msymbol = lookup_minimal_symbol_by_pc_section (new_low, 0); | |
aec2f747 SC |
125 | |
126 | if (msymbol) | |
6ba8e26f | 127 | new_low = SYMBOL_VALUE_ADDRESS (msymbol); |
aec2f747 | 128 | else |
6ba8e26f | 129 | new_low += 1 * max_lines; |
aec2f747 | 130 | |
4cfcaf21 JB |
131 | tui_disassemble (asm_lines, new_low, max_lines); |
132 | last_addr = asm_lines[pos].addr; | |
aec2f747 SC |
133 | } while (last_addr > pc && msymbol); |
134 | ||
1cc6d956 MS |
135 | /* Scan forward disassembling one instruction at a time until |
136 | the last visible instruction of the window matches the pc. | |
137 | We keep the disassembled instructions in the 'lines' window | |
138 | and shift it downward (increasing its addresses). */ | |
aec2f747 SC |
139 | if (last_addr < pc) |
140 | do | |
141 | { | |
142 | CORE_ADDR next_addr; | |
143 | ||
144 | pos++; | |
6ba8e26f | 145 | if (pos >= max_lines) |
aec2f747 SC |
146 | pos = 0; |
147 | ||
4cfcaf21 | 148 | next_addr = tui_disassemble (&asm_lines[pos], last_addr, 1); |
aec2f747 SC |
149 | |
150 | /* If there are some problems while disassembling exit. */ | |
151 | if (next_addr <= last_addr) | |
152 | break; | |
153 | last_addr = next_addr; | |
154 | } while (last_addr <= pc); | |
155 | pos++; | |
6ba8e26f | 156 | if (pos >= max_lines) |
aec2f747 | 157 | pos = 0; |
4cfcaf21 | 158 | new_low = asm_lines[pos].addr; |
aec2f747 | 159 | } |
6ba8e26f | 160 | for (i = 0; i < max_lines; i++) |
aec2f747 | 161 | { |
4cfcaf21 JB |
162 | xfree (asm_lines[i].addr_string); |
163 | xfree (asm_lines[i].insn); | |
aec2f747 | 164 | } |
6ba8e26f | 165 | return new_low; |
aec2f747 SC |
166 | } |
167 | ||
168 | /* Function to set the disassembly window's content. */ | |
65f05602 AC |
169 | enum tui_status |
170 | tui_set_disassem_content (CORE_ADDR pc) | |
c906108c | 171 | { |
22940a24 | 172 | enum tui_status ret = TUI_FAILURE; |
d02c80cd | 173 | int i; |
6d012f14 | 174 | int offset = TUI_DISASM_WIN->detail.source_info.horizontal_offset; |
d02c80cd | 175 | int line_width, max_lines; |
aec2f747 | 176 | CORE_ADDR cur_pc; |
5b6fe301 | 177 | struct tui_gen_win_info *locator = tui_locator_win_info_ptr (); |
dd1abb8c | 178 | int tab_len = tui_default_tab_len (); |
5b6fe301 | 179 | struct tui_asm_line *asm_lines; |
aec2f747 SC |
180 | int insn_pos; |
181 | int addr_size, max_size; | |
5b6fe301 | 182 | char *line; |
aec2f747 SC |
183 | |
184 | if (pc == 0) | |
185 | return TUI_FAILURE; | |
186 | ||
6d012f14 | 187 | ret = tui_alloc_source_buffer (TUI_DISASM_WIN); |
aec2f747 SC |
188 | if (ret != TUI_SUCCESS) |
189 | return ret; | |
190 | ||
362c05fe AS |
191 | TUI_DISASM_WIN->detail.source_info.start_line_or_addr.loa = LOA_ADDRESS; |
192 | TUI_DISASM_WIN->detail.source_info.start_line_or_addr.u.addr = pc; | |
aec2f747 | 193 | cur_pc = (CORE_ADDR) |
6d012f14 | 194 | (((struct tui_win_element *) locator->content[0])->which_element.locator.addr); |
aec2f747 | 195 | |
1cc6d956 MS |
196 | max_lines = TUI_DISASM_WIN->generic.height - 2; /* Account for |
197 | hilite. */ | |
aec2f747 SC |
198 | |
199 | /* Get temporary table that will hold all strings (addr & insn). */ | |
4cfcaf21 | 200 | asm_lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
6ba8e26f | 201 | * max_lines); |
4cfcaf21 | 202 | memset (asm_lines, 0, sizeof (struct tui_asm_line) * max_lines); |
aec2f747 | 203 | |
6ba8e26f | 204 | line_width = TUI_DISASM_WIN->generic.width - 1; |
aec2f747 | 205 | |
4cfcaf21 | 206 | tui_disassemble (asm_lines, pc, max_lines); |
aec2f747 SC |
207 | |
208 | /* See what is the maximum length of an address and of a line. */ | |
209 | addr_size = 0; | |
210 | max_size = 0; | |
6ba8e26f | 211 | for (i = 0; i < max_lines; i++) |
c906108c | 212 | { |
4cfcaf21 | 213 | size_t len = strlen (asm_lines[i].addr_string); |
aec2f747 SC |
214 | if (len > addr_size) |
215 | addr_size = len; | |
c906108c | 216 | |
4cfcaf21 | 217 | len = strlen (asm_lines[i].insn) + tab_len; |
aec2f747 SC |
218 | if (len > max_size) |
219 | max_size = len; | |
c906108c | 220 | } |
aec2f747 SC |
221 | max_size += addr_size + tab_len; |
222 | ||
223 | /* Allocate memory to create each line. */ | |
224 | line = (char*) alloca (max_size); | |
225 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; | |
226 | ||
1cc6d956 | 227 | /* Now construct each line. */ |
6ba8e26f | 228 | for (i = 0; i < max_lines; i++) |
aec2f747 | 229 | { |
5b6fe301 MS |
230 | struct tui_win_element *element; |
231 | struct tui_source_element *src; | |
6ba8e26f | 232 | int cur_len; |
aec2f747 | 233 | |
6d012f14 AC |
234 | element = (struct tui_win_element *) TUI_DISASM_WIN->generic.content[i]; |
235 | src = &element->which_element.source; | |
4cfcaf21 | 236 | strcpy (line, asm_lines[i].addr_string); |
6ba8e26f | 237 | cur_len = strlen (line); |
aec2f747 | 238 | |
1cc6d956 MS |
239 | /* Add spaces to make the instructions start on the same |
240 | column. */ | |
6ba8e26f | 241 | while (cur_len < insn_pos) |
aec2f747 SC |
242 | { |
243 | strcat (line, " "); | |
6ba8e26f | 244 | cur_len++; |
aec2f747 SC |
245 | } |
246 | ||
4cfcaf21 | 247 | strcat (line, asm_lines[i].insn); |
aec2f747 | 248 | |
1cc6d956 | 249 | /* Now copy the line taking the offset into account. */ |
aec2f747 SC |
250 | if (strlen (line) > offset) |
251 | strcpy (src->line, &line[offset]); | |
252 | else | |
253 | src->line[0] = '\0'; | |
254 | ||
362c05fe AS |
255 | src->line_or_addr.loa = LOA_ADDRESS; |
256 | src->line_or_addr.u.addr = asm_lines[i].addr; | |
4cfcaf21 | 257 | src->is_exec_point = asm_lines[i].addr == cur_pc; |
aec2f747 SC |
258 | |
259 | /* See whether there is a breakpoint installed. */ | |
6d012f14 | 260 | src->has_break = (!src->is_exec_point |
aec2f747 | 261 | && breakpoint_here_p (pc) != no_breakpoint_here); |
c906108c | 262 | |
4cfcaf21 JB |
263 | xfree (asm_lines[i].addr_string); |
264 | xfree (asm_lines[i].insn); | |
aec2f747 | 265 | } |
6d012f14 | 266 | TUI_DISASM_WIN->generic.content_size = i; |
aec2f747 SC |
267 | return TUI_SUCCESS; |
268 | } | |
c906108c SS |
269 | |
270 | ||
1cc6d956 | 271 | /* Function to display the disassembly window with disassembled code. */ |
c906108c | 272 | void |
6ba8e26f | 273 | tui_show_disassem (CORE_ADDR start_addr) |
c906108c | 274 | { |
6ba8e26f | 275 | struct symtab *s = find_pc_symtab (start_addr); |
5b6fe301 | 276 | struct tui_win_info *win_with_focus = tui_win_with_focus (); |
362c05fe | 277 | struct tui_line_or_address val; |
c906108c | 278 | |
362c05fe AS |
279 | val.loa = LOA_ADDRESS; |
280 | val.u.addr = start_addr; | |
080ce8c0 | 281 | tui_add_win_to_layout (DISASSEM_WIN); |
6d012f14 | 282 | tui_update_source_window (TUI_DISASM_WIN, s, val, FALSE); |
ef5eab5a MS |
283 | |
284 | /* If the focus was in the src win, put it in the asm win, if the | |
285 | source view isn't split. */ | |
6ba8e26f | 286 | if (tui_current_layout () != SRC_DISASSEM_COMMAND && win_with_focus == TUI_SRC_WIN) |
6d012f14 | 287 | tui_set_win_focus_to (TUI_DISASM_WIN); |
c906108c SS |
288 | |
289 | return; | |
65f05602 | 290 | } |
c906108c SS |
291 | |
292 | ||
1cc6d956 | 293 | /* Function to display the disassembly window. */ |
c906108c | 294 | void |
6ba8e26f | 295 | tui_show_disassem_and_update_source (CORE_ADDR start_addr) |
c906108c SS |
296 | { |
297 | struct symtab_and_line sal; | |
298 | ||
6ba8e26f | 299 | tui_show_disassem (start_addr); |
dd1abb8c | 300 | if (tui_current_layout () == SRC_DISASSEM_COMMAND) |
c906108c | 301 | { |
362c05fe | 302 | struct tui_line_or_address val; |
aec2f747 | 303 | |
ef5eab5a MS |
304 | /* Update what is in the source window if it is displayed too, |
305 | note that it follows what is in the disassembly window and | |
306 | visa-versa. */ | |
6ba8e26f | 307 | sal = find_pc_line (start_addr, 0); |
362c05fe AS |
308 | val.loa = LOA_LINE; |
309 | val.u.line_no = sal.line; | |
6d012f14 | 310 | tui_update_source_window (TUI_SRC_WIN, sal.symtab, val, TRUE); |
3024f13a SC |
311 | if (sal.symtab) |
312 | { | |
52575520 | 313 | set_current_source_symtab_and_line (&sal); |
47d3492a | 314 | tui_update_locator_filename (sal.symtab->filename); |
3024f13a SC |
315 | } |
316 | else | |
47d3492a | 317 | tui_update_locator_filename ("?"); |
c906108c SS |
318 | } |
319 | ||
320 | return; | |
65f05602 | 321 | } |
c906108c | 322 | |
c774cec6 | 323 | CORE_ADDR |
65f05602 | 324 | tui_get_begin_asm_address (void) |
c906108c | 325 | { |
5b6fe301 MS |
326 | struct tui_gen_win_info *locator; |
327 | struct tui_locator_element *element; | |
c774cec6 | 328 | CORE_ADDR addr; |
c906108c | 329 | |
dd1abb8c | 330 | locator = tui_locator_win_info_ptr (); |
6d012f14 | 331 | element = &((struct tui_win_element *) locator->content[0])->which_element.locator; |
c906108c | 332 | |
c774cec6 | 333 | if (element->addr == 0) |
c906108c | 334 | { |
0510ab86 SC |
335 | struct minimal_symbol *main_symbol; |
336 | ||
337 | /* Find address of the start of program. | |
338 | Note: this should be language specific. */ | |
339 | main_symbol = lookup_minimal_symbol ("main", NULL, NULL); | |
340 | if (main_symbol == 0) | |
341 | main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); | |
342 | if (main_symbol == 0) | |
343 | main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); | |
344 | if (main_symbol) | |
345 | addr = SYMBOL_VALUE_ADDRESS (main_symbol); | |
346 | else | |
347 | addr = 0; | |
c906108c | 348 | } |
1cc6d956 | 349 | else /* The target is executing. */ |
c906108c SS |
350 | addr = element->addr; |
351 | ||
352 | return addr; | |
65f05602 | 353 | } |
c906108c | 354 | |
77cad3ba | 355 | /* Determine what the low address will be to display in the TUI's |
1cc6d956 MS |
356 | disassembly window. This may or may not be the same as the low |
357 | address input. */ | |
77cad3ba | 358 | CORE_ADDR |
08ef48c5 MS |
359 | tui_get_low_disassembly_address (CORE_ADDR low, |
360 | CORE_ADDR pc) | |
77cad3ba SC |
361 | { |
362 | int pos; | |
363 | ||
1cc6d956 MS |
364 | /* Determine where to start the disassembly so that the pc is about |
365 | in the middle of the viewport. */ | |
080ce8c0 | 366 | pos = tui_default_win_viewport_height (DISASSEM_WIN, DISASSEM_COMMAND) / 2; |
77cad3ba SC |
367 | pc = tui_find_disassembly_address (pc, -pos); |
368 | ||
369 | if (pc < low) | |
370 | pc = low; | |
371 | return pc; | |
372 | } | |
373 | ||
65f05602 | 374 | /* Scroll the disassembly forward or backward vertically. */ |
c906108c | 375 | void |
6ba8e26f AC |
376 | tui_vertical_disassem_scroll (enum tui_scroll_direction scroll_direction, |
377 | int num_to_scroll) | |
c906108c | 378 | { |
6d012f14 | 379 | if (TUI_DISASM_WIN->generic.content != NULL) |
c906108c | 380 | { |
aec2f747 | 381 | CORE_ADDR pc; |
2a8854a7 | 382 | tui_win_content content; |
c906108c | 383 | struct symtab *s; |
362c05fe | 384 | struct tui_line_or_address val; |
6ba8e26f | 385 | int max_lines, dir; |
52575520 | 386 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c | 387 | |
6d012f14 | 388 | content = (tui_win_content) TUI_DISASM_WIN->generic.content; |
52575520 | 389 | if (cursal.symtab == (struct symtab *) NULL) |
206415a3 | 390 | s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL))); |
c906108c | 391 | else |
52575520 | 392 | s = cursal.symtab; |
c906108c | 393 | |
1cc6d956 | 394 | /* Account for hilite. */ |
6ba8e26f | 395 | max_lines = TUI_DISASM_WIN->generic.height - 2; |
362c05fe | 396 | pc = content[0]->which_element.source.line_or_addr.u.addr; |
6ba8e26f | 397 | dir = (scroll_direction == FORWARD_SCROLL) ? max_lines : - max_lines; |
c906108c | 398 | |
362c05fe AS |
399 | val.loa = LOA_ADDRESS; |
400 | val.u.addr = tui_find_disassembly_address (pc, dir); | |
6d012f14 | 401 | tui_update_source_window_as_is (TUI_DISASM_WIN, s, val, FALSE); |
aec2f747 SC |
402 | } |
403 | } |