Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* Disassembly display. |
f33c6cbf | 2 | |
9b254dd1 | 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008 |
6aba47ca | 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 | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
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 | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "symtab.h" | |
25 | #include "breakpoint.h" | |
26 | #include "frame.h" | |
fd0407d6 | 27 | #include "value.h" |
52575520 | 28 | #include "source.h" |
f70a7d61 | 29 | #include "disasm.h" |
6d012f14 | 30 | #include "gdb_string.h" |
d7b2e967 AC |
31 | #include "tui/tui.h" |
32 | #include "tui/tui-data.h" | |
33 | #include "tui/tui-win.h" | |
34 | #include "tui/tui-layout.h" | |
35 | #include "tui/tui-winsource.h" | |
36 | #include "tui/tui-stack.h" | |
37 | #include "tui/tui-file.h" | |
c906108c | 38 | |
6a83354a | 39 | #include "gdb_curses.h" |
96ec9981 | 40 | |
aec2f747 SC |
41 | struct tui_asm_line |
42 | { | |
43 | CORE_ADDR addr; | |
5b6fe301 MS |
44 | char *addr_string; |
45 | char *insn; | |
aec2f747 SC |
46 | }; |
47 | ||
48 | /* Function to set the disassembly window's content. | |
49 | Disassemble count lines starting at pc. | |
50 | Return address of the count'th instruction after pc. */ | |
51 | static CORE_ADDR | |
08ef48c5 MS |
52 | tui_disassemble (struct tui_asm_line *asm_lines, |
53 | CORE_ADDR pc, int count) | |
aec2f747 SC |
54 | { |
55 | struct ui_file *gdb_dis_out; | |
c906108c | 56 | |
1cc6d956 | 57 | /* Now init the ui_file structure. */ |
aec2f747 SC |
58 | gdb_dis_out = tui_sfileopen (256); |
59 | ||
1cc6d956 | 60 | /* Now construct each line. */ |
4cfcaf21 | 61 | for (; count > 0; count--, asm_lines++) |
aec2f747 | 62 | { |
4cfcaf21 JB |
63 | if (asm_lines->addr_string) |
64 | xfree (asm_lines->addr_string); | |
65 | if (asm_lines->insn) | |
66 | xfree (asm_lines->insn); | |
aec2f747 SC |
67 | |
68 | print_address (pc, gdb_dis_out); | |
4cfcaf21 JB |
69 | asm_lines->addr = pc; |
70 | asm_lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
aec2f747 SC |
71 | |
72 | ui_file_rewind (gdb_dis_out); | |
73 | ||
a4642986 | 74 | pc = pc + gdb_print_insn (pc, gdb_dis_out, NULL); |
aec2f747 | 75 | |
4cfcaf21 | 76 | asm_lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); |
aec2f747 | 77 | |
1cc6d956 | 78 | /* Reset the buffer to empty. */ |
aec2f747 SC |
79 | ui_file_rewind (gdb_dis_out); |
80 | } | |
81 | ui_file_delete (gdb_dis_out); | |
82 | return pc; | |
83 | } | |
84 | ||
1cc6d956 MS |
85 | /* Find the disassembly address that corresponds to FROM lines above |
86 | or below the PC. Variable sized instructions are taken into | |
87 | account by the algorithm. */ | |
aec2f747 SC |
88 | static CORE_ADDR |
89 | tui_find_disassembly_address (CORE_ADDR pc, int from) | |
90 | { | |
d02c80cd | 91 | CORE_ADDR new_low; |
6ba8e26f | 92 | int max_lines; |
aec2f747 | 93 | int i; |
5b6fe301 | 94 | struct tui_asm_line *asm_lines; |
aec2f747 | 95 | |
6ba8e26f AC |
96 | max_lines = (from > 0) ? from : - from; |
97 | if (max_lines <= 1) | |
aec2f747 SC |
98 | return pc; |
99 | ||
4cfcaf21 | 100 | asm_lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
6ba8e26f | 101 | * max_lines); |
4cfcaf21 | 102 | memset (asm_lines, 0, sizeof (struct tui_asm_line) * max_lines); |
aec2f747 | 103 | |
6ba8e26f | 104 | new_low = pc; |
aec2f747 SC |
105 | if (from > 0) |
106 | { | |
4cfcaf21 JB |
107 | tui_disassemble (asm_lines, pc, max_lines); |
108 | new_low = asm_lines[max_lines - 1].addr; | |
aec2f747 SC |
109 | } |
110 | else | |
111 | { | |
112 | CORE_ADDR last_addr; | |
113 | int pos; | |
5b6fe301 | 114 | struct minimal_symbol *msymbol; |
aec2f747 | 115 | |
1cc6d956 MS |
116 | /* Find backward an address which is a symbol and for which |
117 | disassembling from that address will fill completely the | |
118 | window. */ | |
6ba8e26f | 119 | pos = max_lines - 1; |
aec2f747 | 120 | do { |
6ba8e26f AC |
121 | new_low -= 1 * max_lines; |
122 | msymbol = lookup_minimal_symbol_by_pc_section (new_low, 0); | |
aec2f747 SC |
123 | |
124 | if (msymbol) | |
6ba8e26f | 125 | new_low = SYMBOL_VALUE_ADDRESS (msymbol); |
aec2f747 | 126 | else |
6ba8e26f | 127 | new_low += 1 * max_lines; |
aec2f747 | 128 | |
4cfcaf21 JB |
129 | tui_disassemble (asm_lines, new_low, max_lines); |
130 | last_addr = asm_lines[pos].addr; | |
aec2f747 SC |
131 | } while (last_addr > pc && msymbol); |
132 | ||
1cc6d956 MS |
133 | /* Scan forward disassembling one instruction at a time until |
134 | the last visible instruction of the window matches the pc. | |
135 | We keep the disassembled instructions in the 'lines' window | |
136 | and shift it downward (increasing its addresses). */ | |
aec2f747 SC |
137 | if (last_addr < pc) |
138 | do | |
139 | { | |
140 | CORE_ADDR next_addr; | |
141 | ||
142 | pos++; | |
6ba8e26f | 143 | if (pos >= max_lines) |
aec2f747 SC |
144 | pos = 0; |
145 | ||
4cfcaf21 | 146 | next_addr = tui_disassemble (&asm_lines[pos], last_addr, 1); |
aec2f747 SC |
147 | |
148 | /* If there are some problems while disassembling exit. */ | |
149 | if (next_addr <= last_addr) | |
150 | break; | |
151 | last_addr = next_addr; | |
152 | } while (last_addr <= pc); | |
153 | pos++; | |
6ba8e26f | 154 | if (pos >= max_lines) |
aec2f747 | 155 | pos = 0; |
4cfcaf21 | 156 | new_low = asm_lines[pos].addr; |
aec2f747 | 157 | } |
6ba8e26f | 158 | for (i = 0; i < max_lines; i++) |
aec2f747 | 159 | { |
4cfcaf21 JB |
160 | xfree (asm_lines[i].addr_string); |
161 | xfree (asm_lines[i].insn); | |
aec2f747 | 162 | } |
6ba8e26f | 163 | return new_low; |
aec2f747 SC |
164 | } |
165 | ||
166 | /* Function to set the disassembly window's content. */ | |
65f05602 AC |
167 | enum tui_status |
168 | tui_set_disassem_content (CORE_ADDR pc) | |
c906108c | 169 | { |
22940a24 | 170 | enum tui_status ret = TUI_FAILURE; |
d02c80cd | 171 | int i; |
6d012f14 | 172 | int offset = TUI_DISASM_WIN->detail.source_info.horizontal_offset; |
d02c80cd | 173 | int line_width, max_lines; |
aec2f747 | 174 | CORE_ADDR cur_pc; |
5b6fe301 | 175 | struct tui_gen_win_info *locator = tui_locator_win_info_ptr (); |
dd1abb8c | 176 | int tab_len = tui_default_tab_len (); |
5b6fe301 | 177 | struct tui_asm_line *asm_lines; |
aec2f747 SC |
178 | int insn_pos; |
179 | int addr_size, max_size; | |
5b6fe301 | 180 | char *line; |
aec2f747 SC |
181 | |
182 | if (pc == 0) | |
183 | return TUI_FAILURE; | |
184 | ||
6d012f14 | 185 | ret = tui_alloc_source_buffer (TUI_DISASM_WIN); |
aec2f747 SC |
186 | if (ret != TUI_SUCCESS) |
187 | return ret; | |
188 | ||
362c05fe AS |
189 | TUI_DISASM_WIN->detail.source_info.start_line_or_addr.loa = LOA_ADDRESS; |
190 | TUI_DISASM_WIN->detail.source_info.start_line_or_addr.u.addr = pc; | |
aec2f747 | 191 | cur_pc = (CORE_ADDR) |
6d012f14 | 192 | (((struct tui_win_element *) locator->content[0])->which_element.locator.addr); |
aec2f747 | 193 | |
1cc6d956 MS |
194 | max_lines = TUI_DISASM_WIN->generic.height - 2; /* Account for |
195 | hilite. */ | |
aec2f747 SC |
196 | |
197 | /* Get temporary table that will hold all strings (addr & insn). */ | |
4cfcaf21 | 198 | asm_lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
6ba8e26f | 199 | * max_lines); |
4cfcaf21 | 200 | memset (asm_lines, 0, sizeof (struct tui_asm_line) * max_lines); |
aec2f747 | 201 | |
6ba8e26f | 202 | line_width = TUI_DISASM_WIN->generic.width - 1; |
aec2f747 | 203 | |
4cfcaf21 | 204 | tui_disassemble (asm_lines, pc, max_lines); |
aec2f747 SC |
205 | |
206 | /* See what is the maximum length of an address and of a line. */ | |
207 | addr_size = 0; | |
208 | max_size = 0; | |
6ba8e26f | 209 | for (i = 0; i < max_lines; i++) |
c906108c | 210 | { |
4cfcaf21 | 211 | size_t len = strlen (asm_lines[i].addr_string); |
aec2f747 SC |
212 | if (len > addr_size) |
213 | addr_size = len; | |
c906108c | 214 | |
4cfcaf21 | 215 | len = strlen (asm_lines[i].insn) + tab_len; |
aec2f747 SC |
216 | if (len > max_size) |
217 | max_size = len; | |
c906108c | 218 | } |
aec2f747 SC |
219 | max_size += addr_size + tab_len; |
220 | ||
221 | /* Allocate memory to create each line. */ | |
222 | line = (char*) alloca (max_size); | |
223 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; | |
224 | ||
1cc6d956 | 225 | /* Now construct each line. */ |
6ba8e26f | 226 | for (i = 0; i < max_lines; i++) |
aec2f747 | 227 | { |
5b6fe301 MS |
228 | struct tui_win_element *element; |
229 | struct tui_source_element *src; | |
6ba8e26f | 230 | int cur_len; |
aec2f747 | 231 | |
6d012f14 AC |
232 | element = (struct tui_win_element *) TUI_DISASM_WIN->generic.content[i]; |
233 | src = &element->which_element.source; | |
4cfcaf21 | 234 | strcpy (line, asm_lines[i].addr_string); |
6ba8e26f | 235 | cur_len = strlen (line); |
aec2f747 | 236 | |
1cc6d956 MS |
237 | /* Add spaces to make the instructions start on the same |
238 | column. */ | |
6ba8e26f | 239 | while (cur_len < insn_pos) |
aec2f747 SC |
240 | { |
241 | strcat (line, " "); | |
6ba8e26f | 242 | cur_len++; |
aec2f747 SC |
243 | } |
244 | ||
4cfcaf21 | 245 | strcat (line, asm_lines[i].insn); |
aec2f747 | 246 | |
1cc6d956 | 247 | /* Now copy the line taking the offset into account. */ |
aec2f747 SC |
248 | if (strlen (line) > offset) |
249 | strcpy (src->line, &line[offset]); | |
250 | else | |
251 | src->line[0] = '\0'; | |
252 | ||
362c05fe AS |
253 | src->line_or_addr.loa = LOA_ADDRESS; |
254 | src->line_or_addr.u.addr = asm_lines[i].addr; | |
4cfcaf21 | 255 | src->is_exec_point = asm_lines[i].addr == cur_pc; |
aec2f747 SC |
256 | |
257 | /* See whether there is a breakpoint installed. */ | |
6d012f14 | 258 | src->has_break = (!src->is_exec_point |
aec2f747 | 259 | && breakpoint_here_p (pc) != no_breakpoint_here); |
c906108c | 260 | |
4cfcaf21 JB |
261 | xfree (asm_lines[i].addr_string); |
262 | xfree (asm_lines[i].insn); | |
aec2f747 | 263 | } |
6d012f14 | 264 | TUI_DISASM_WIN->generic.content_size = i; |
aec2f747 SC |
265 | return TUI_SUCCESS; |
266 | } | |
c906108c SS |
267 | |
268 | ||
1cc6d956 | 269 | /* Function to display the disassembly window with disassembled code. */ |
c906108c | 270 | void |
6ba8e26f | 271 | tui_show_disassem (CORE_ADDR start_addr) |
c906108c | 272 | { |
6ba8e26f | 273 | struct symtab *s = find_pc_symtab (start_addr); |
5b6fe301 | 274 | struct tui_win_info *win_with_focus = tui_win_with_focus (); |
362c05fe | 275 | struct tui_line_or_address val; |
c906108c | 276 | |
362c05fe AS |
277 | val.loa = LOA_ADDRESS; |
278 | val.u.addr = start_addr; | |
080ce8c0 | 279 | tui_add_win_to_layout (DISASSEM_WIN); |
6d012f14 | 280 | tui_update_source_window (TUI_DISASM_WIN, s, val, FALSE); |
ef5eab5a MS |
281 | |
282 | /* If the focus was in the src win, put it in the asm win, if the | |
283 | source view isn't split. */ | |
e5908723 MS |
284 | if (tui_current_layout () != SRC_DISASSEM_COMMAND |
285 | && win_with_focus == TUI_SRC_WIN) | |
6d012f14 | 286 | tui_set_win_focus_to (TUI_DISASM_WIN); |
c906108c SS |
287 | |
288 | return; | |
65f05602 | 289 | } |
c906108c SS |
290 | |
291 | ||
1cc6d956 | 292 | /* Function to display the disassembly window. */ |
c906108c | 293 | void |
6ba8e26f | 294 | tui_show_disassem_and_update_source (CORE_ADDR start_addr) |
c906108c SS |
295 | { |
296 | struct symtab_and_line sal; | |
297 | ||
6ba8e26f | 298 | tui_show_disassem (start_addr); |
dd1abb8c | 299 | if (tui_current_layout () == SRC_DISASSEM_COMMAND) |
c906108c | 300 | { |
362c05fe | 301 | struct tui_line_or_address val; |
aec2f747 | 302 | |
ef5eab5a MS |
303 | /* Update what is in the source window if it is displayed too, |
304 | note that it follows what is in the disassembly window and | |
305 | visa-versa. */ | |
6ba8e26f | 306 | sal = find_pc_line (start_addr, 0); |
362c05fe AS |
307 | val.loa = LOA_LINE; |
308 | val.u.line_no = sal.line; | |
6d012f14 | 309 | tui_update_source_window (TUI_SRC_WIN, sal.symtab, val, TRUE); |
3024f13a SC |
310 | if (sal.symtab) |
311 | { | |
52575520 | 312 | set_current_source_symtab_and_line (&sal); |
47d3492a | 313 | tui_update_locator_filename (sal.symtab->filename); |
3024f13a SC |
314 | } |
315 | else | |
47d3492a | 316 | tui_update_locator_filename ("?"); |
c906108c SS |
317 | } |
318 | ||
319 | return; | |
65f05602 | 320 | } |
c906108c | 321 | |
c774cec6 | 322 | CORE_ADDR |
65f05602 | 323 | tui_get_begin_asm_address (void) |
c906108c | 324 | { |
5b6fe301 MS |
325 | struct tui_gen_win_info *locator; |
326 | struct tui_locator_element *element; | |
c774cec6 | 327 | CORE_ADDR addr; |
c906108c | 328 | |
dd1abb8c | 329 | locator = tui_locator_win_info_ptr (); |
6d012f14 | 330 | element = &((struct tui_win_element *) locator->content[0])->which_element.locator; |
c906108c | 331 | |
c774cec6 | 332 | if (element->addr == 0) |
c906108c | 333 | { |
0510ab86 SC |
334 | struct minimal_symbol *main_symbol; |
335 | ||
336 | /* Find address of the start of program. | |
337 | Note: this should be language specific. */ | |
338 | main_symbol = lookup_minimal_symbol ("main", NULL, NULL); | |
339 | if (main_symbol == 0) | |
340 | main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); | |
341 | if (main_symbol == 0) | |
342 | main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); | |
343 | if (main_symbol) | |
344 | addr = SYMBOL_VALUE_ADDRESS (main_symbol); | |
345 | else | |
346 | addr = 0; | |
c906108c | 347 | } |
1cc6d956 | 348 | else /* The target is executing. */ |
c906108c SS |
349 | addr = element->addr; |
350 | ||
351 | return addr; | |
65f05602 | 352 | } |
c906108c | 353 | |
77cad3ba | 354 | /* Determine what the low address will be to display in the TUI's |
1cc6d956 MS |
355 | disassembly window. This may or may not be the same as the low |
356 | address input. */ | |
77cad3ba | 357 | CORE_ADDR |
08ef48c5 MS |
358 | tui_get_low_disassembly_address (CORE_ADDR low, |
359 | CORE_ADDR pc) | |
77cad3ba SC |
360 | { |
361 | int pos; | |
362 | ||
1cc6d956 MS |
363 | /* Determine where to start the disassembly so that the pc is about |
364 | in the middle of the viewport. */ | |
080ce8c0 | 365 | pos = tui_default_win_viewport_height (DISASSEM_WIN, DISASSEM_COMMAND) / 2; |
77cad3ba SC |
366 | pc = tui_find_disassembly_address (pc, -pos); |
367 | ||
368 | if (pc < low) | |
369 | pc = low; | |
370 | return pc; | |
371 | } | |
372 | ||
65f05602 | 373 | /* Scroll the disassembly forward or backward vertically. */ |
c906108c | 374 | void |
6ba8e26f AC |
375 | tui_vertical_disassem_scroll (enum tui_scroll_direction scroll_direction, |
376 | int num_to_scroll) | |
c906108c | 377 | { |
6d012f14 | 378 | if (TUI_DISASM_WIN->generic.content != NULL) |
c906108c | 379 | { |
aec2f747 | 380 | CORE_ADDR pc; |
2a8854a7 | 381 | tui_win_content content; |
c906108c | 382 | struct symtab *s; |
362c05fe | 383 | struct tui_line_or_address val; |
6ba8e26f | 384 | int max_lines, dir; |
52575520 | 385 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c | 386 | |
6d012f14 | 387 | content = (tui_win_content) TUI_DISASM_WIN->generic.content; |
52575520 | 388 | if (cursal.symtab == (struct symtab *) NULL) |
206415a3 | 389 | s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL))); |
c906108c | 390 | else |
52575520 | 391 | s = cursal.symtab; |
c906108c | 392 | |
1cc6d956 | 393 | /* Account for hilite. */ |
6ba8e26f | 394 | max_lines = TUI_DISASM_WIN->generic.height - 2; |
362c05fe | 395 | pc = content[0]->which_element.source.line_or_addr.u.addr; |
6ba8e26f | 396 | dir = (scroll_direction == FORWARD_SCROLL) ? max_lines : - max_lines; |
c906108c | 397 | |
362c05fe AS |
398 | val.loa = LOA_ADDRESS; |
399 | val.u.addr = tui_find_disassembly_address (pc, dir); | |
6d012f14 | 400 | tui_update_source_window_as_is (TUI_DISASM_WIN, s, val, FALSE); |
aec2f747 SC |
401 | } |
402 | } |