Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* Disassembly display. |
f33c6cbf | 2 | |
0fb0cc75 | 3 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009 |
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" | |
2c0b251b | 38 | #include "tui/tui-disasm.h" |
c906108c | 39 | |
6a83354a | 40 | #include "gdb_curses.h" |
96ec9981 | 41 | |
aec2f747 SC |
42 | struct tui_asm_line |
43 | { | |
44 | CORE_ADDR addr; | |
5b6fe301 MS |
45 | char *addr_string; |
46 | char *insn; | |
aec2f747 SC |
47 | }; |
48 | ||
49 | /* Function to set the disassembly window's content. | |
50 | Disassemble count lines starting at pc. | |
51 | Return address of the count'th instruction after pc. */ | |
52 | static CORE_ADDR | |
08ef48c5 MS |
53 | tui_disassemble (struct tui_asm_line *asm_lines, |
54 | CORE_ADDR pc, int count) | |
aec2f747 SC |
55 | { |
56 | struct ui_file *gdb_dis_out; | |
c906108c | 57 | |
1cc6d956 | 58 | /* Now init the ui_file structure. */ |
aec2f747 SC |
59 | gdb_dis_out = tui_sfileopen (256); |
60 | ||
1cc6d956 | 61 | /* Now construct each line. */ |
4cfcaf21 | 62 | for (; count > 0; count--, asm_lines++) |
aec2f747 | 63 | { |
4cfcaf21 JB |
64 | if (asm_lines->addr_string) |
65 | xfree (asm_lines->addr_string); | |
66 | if (asm_lines->insn) | |
67 | xfree (asm_lines->insn); | |
aec2f747 SC |
68 | |
69 | print_address (pc, gdb_dis_out); | |
4cfcaf21 JB |
70 | asm_lines->addr = pc; |
71 | asm_lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
aec2f747 SC |
72 | |
73 | ui_file_rewind (gdb_dis_out); | |
74 | ||
a4642986 | 75 | pc = pc + gdb_print_insn (pc, gdb_dis_out, NULL); |
aec2f747 | 76 | |
4cfcaf21 | 77 | asm_lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); |
aec2f747 | 78 | |
1cc6d956 | 79 | /* Reset the buffer to empty. */ |
aec2f747 SC |
80 | ui_file_rewind (gdb_dis_out); |
81 | } | |
82 | ui_file_delete (gdb_dis_out); | |
83 | return pc; | |
84 | } | |
85 | ||
1cc6d956 MS |
86 | /* Find the disassembly address that corresponds to FROM lines above |
87 | or below the PC. Variable sized instructions are taken into | |
88 | account by the algorithm. */ | |
aec2f747 SC |
89 | static CORE_ADDR |
90 | tui_find_disassembly_address (CORE_ADDR pc, int from) | |
91 | { | |
d02c80cd | 92 | CORE_ADDR new_low; |
6ba8e26f | 93 | int max_lines; |
aec2f747 | 94 | int i; |
5b6fe301 | 95 | struct tui_asm_line *asm_lines; |
aec2f747 | 96 | |
6ba8e26f AC |
97 | max_lines = (from > 0) ? from : - from; |
98 | if (max_lines <= 1) | |
aec2f747 SC |
99 | return pc; |
100 | ||
4cfcaf21 | 101 | asm_lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
6ba8e26f | 102 | * max_lines); |
4cfcaf21 | 103 | memset (asm_lines, 0, sizeof (struct tui_asm_line) * max_lines); |
aec2f747 | 104 | |
6ba8e26f | 105 | new_low = pc; |
aec2f747 SC |
106 | if (from > 0) |
107 | { | |
4cfcaf21 JB |
108 | tui_disassemble (asm_lines, pc, max_lines); |
109 | new_low = asm_lines[max_lines - 1].addr; | |
aec2f747 SC |
110 | } |
111 | else | |
112 | { | |
113 | CORE_ADDR last_addr; | |
114 | int pos; | |
5b6fe301 | 115 | struct minimal_symbol *msymbol; |
aec2f747 | 116 | |
1cc6d956 MS |
117 | /* Find backward an address which is a symbol and for which |
118 | disassembling from that address will fill completely the | |
119 | window. */ | |
6ba8e26f | 120 | pos = max_lines - 1; |
aec2f747 | 121 | do { |
6ba8e26f AC |
122 | new_low -= 1 * max_lines; |
123 | msymbol = lookup_minimal_symbol_by_pc_section (new_low, 0); | |
aec2f747 SC |
124 | |
125 | if (msymbol) | |
6ba8e26f | 126 | new_low = SYMBOL_VALUE_ADDRESS (msymbol); |
aec2f747 | 127 | else |
6ba8e26f | 128 | new_low += 1 * max_lines; |
aec2f747 | 129 | |
4cfcaf21 JB |
130 | tui_disassemble (asm_lines, new_low, max_lines); |
131 | last_addr = asm_lines[pos].addr; | |
aec2f747 SC |
132 | } while (last_addr > pc && msymbol); |
133 | ||
1cc6d956 MS |
134 | /* Scan forward disassembling one instruction at a time until |
135 | the last visible instruction of the window matches the pc. | |
136 | We keep the disassembled instructions in the 'lines' window | |
137 | and shift it downward (increasing its addresses). */ | |
aec2f747 SC |
138 | if (last_addr < pc) |
139 | do | |
140 | { | |
141 | CORE_ADDR next_addr; | |
142 | ||
143 | pos++; | |
6ba8e26f | 144 | if (pos >= max_lines) |
aec2f747 SC |
145 | pos = 0; |
146 | ||
4cfcaf21 | 147 | next_addr = tui_disassemble (&asm_lines[pos], last_addr, 1); |
aec2f747 SC |
148 | |
149 | /* If there are some problems while disassembling exit. */ | |
150 | if (next_addr <= last_addr) | |
151 | break; | |
152 | last_addr = next_addr; | |
153 | } while (last_addr <= pc); | |
154 | pos++; | |
6ba8e26f | 155 | if (pos >= max_lines) |
aec2f747 | 156 | pos = 0; |
4cfcaf21 | 157 | new_low = asm_lines[pos].addr; |
aec2f747 | 158 | } |
6ba8e26f | 159 | for (i = 0; i < max_lines; i++) |
aec2f747 | 160 | { |
4cfcaf21 JB |
161 | xfree (asm_lines[i].addr_string); |
162 | xfree (asm_lines[i].insn); | |
aec2f747 | 163 | } |
6ba8e26f | 164 | return new_low; |
aec2f747 SC |
165 | } |
166 | ||
167 | /* Function to set the disassembly window's content. */ | |
65f05602 AC |
168 | enum tui_status |
169 | tui_set_disassem_content (CORE_ADDR pc) | |
c906108c | 170 | { |
22940a24 | 171 | enum tui_status ret = TUI_FAILURE; |
d02c80cd | 172 | int i; |
6d012f14 | 173 | int offset = TUI_DISASM_WIN->detail.source_info.horizontal_offset; |
d02c80cd | 174 | int line_width, max_lines; |
aec2f747 | 175 | CORE_ADDR cur_pc; |
5b6fe301 | 176 | struct tui_gen_win_info *locator = tui_locator_win_info_ptr (); |
dd1abb8c | 177 | int tab_len = tui_default_tab_len (); |
5b6fe301 | 178 | struct tui_asm_line *asm_lines; |
aec2f747 SC |
179 | int insn_pos; |
180 | int addr_size, max_size; | |
5b6fe301 | 181 | char *line; |
aec2f747 SC |
182 | |
183 | if (pc == 0) | |
184 | return TUI_FAILURE; | |
185 | ||
6d012f14 | 186 | ret = tui_alloc_source_buffer (TUI_DISASM_WIN); |
aec2f747 SC |
187 | if (ret != TUI_SUCCESS) |
188 | return ret; | |
189 | ||
362c05fe AS |
190 | TUI_DISASM_WIN->detail.source_info.start_line_or_addr.loa = LOA_ADDRESS; |
191 | TUI_DISASM_WIN->detail.source_info.start_line_or_addr.u.addr = pc; | |
aec2f747 | 192 | cur_pc = (CORE_ADDR) |
6d012f14 | 193 | (((struct tui_win_element *) locator->content[0])->which_element.locator.addr); |
aec2f747 | 194 | |
1cc6d956 MS |
195 | max_lines = TUI_DISASM_WIN->generic.height - 2; /* Account for |
196 | hilite. */ | |
aec2f747 SC |
197 | |
198 | /* Get temporary table that will hold all strings (addr & insn). */ | |
4cfcaf21 | 199 | asm_lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) |
6ba8e26f | 200 | * max_lines); |
4cfcaf21 | 201 | memset (asm_lines, 0, sizeof (struct tui_asm_line) * max_lines); |
aec2f747 | 202 | |
6ba8e26f | 203 | line_width = TUI_DISASM_WIN->generic.width - 1; |
aec2f747 | 204 | |
4cfcaf21 | 205 | tui_disassemble (asm_lines, pc, max_lines); |
aec2f747 SC |
206 | |
207 | /* See what is the maximum length of an address and of a line. */ | |
208 | addr_size = 0; | |
209 | max_size = 0; | |
6ba8e26f | 210 | for (i = 0; i < max_lines; i++) |
c906108c | 211 | { |
4cfcaf21 | 212 | size_t len = strlen (asm_lines[i].addr_string); |
aec2f747 SC |
213 | if (len > addr_size) |
214 | addr_size = len; | |
c906108c | 215 | |
4cfcaf21 | 216 | len = strlen (asm_lines[i].insn) + tab_len; |
aec2f747 SC |
217 | if (len > max_size) |
218 | max_size = len; | |
c906108c | 219 | } |
aec2f747 SC |
220 | max_size += addr_size + tab_len; |
221 | ||
222 | /* Allocate memory to create each line. */ | |
223 | line = (char*) alloca (max_size); | |
224 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; | |
225 | ||
1cc6d956 | 226 | /* Now construct each line. */ |
6ba8e26f | 227 | for (i = 0; i < max_lines; i++) |
aec2f747 | 228 | { |
5b6fe301 MS |
229 | struct tui_win_element *element; |
230 | struct tui_source_element *src; | |
6ba8e26f | 231 | int cur_len; |
aec2f747 | 232 | |
6d012f14 AC |
233 | element = (struct tui_win_element *) TUI_DISASM_WIN->generic.content[i]; |
234 | src = &element->which_element.source; | |
4cfcaf21 | 235 | strcpy (line, asm_lines[i].addr_string); |
6ba8e26f | 236 | cur_len = strlen (line); |
aec2f747 | 237 | |
1cc6d956 MS |
238 | /* Add spaces to make the instructions start on the same |
239 | column. */ | |
6ba8e26f | 240 | while (cur_len < insn_pos) |
aec2f747 SC |
241 | { |
242 | strcat (line, " "); | |
6ba8e26f | 243 | cur_len++; |
aec2f747 SC |
244 | } |
245 | ||
4cfcaf21 | 246 | strcat (line, asm_lines[i].insn); |
aec2f747 | 247 | |
1cc6d956 | 248 | /* Now copy the line taking the offset into account. */ |
aec2f747 SC |
249 | if (strlen (line) > offset) |
250 | strcpy (src->line, &line[offset]); | |
251 | else | |
252 | src->line[0] = '\0'; | |
253 | ||
362c05fe AS |
254 | src->line_or_addr.loa = LOA_ADDRESS; |
255 | src->line_or_addr.u.addr = asm_lines[i].addr; | |
4cfcaf21 | 256 | src->is_exec_point = asm_lines[i].addr == cur_pc; |
aec2f747 SC |
257 | |
258 | /* See whether there is a breakpoint installed. */ | |
6d012f14 | 259 | src->has_break = (!src->is_exec_point |
aec2f747 | 260 | && breakpoint_here_p (pc) != no_breakpoint_here); |
c906108c | 261 | |
4cfcaf21 JB |
262 | xfree (asm_lines[i].addr_string); |
263 | xfree (asm_lines[i].insn); | |
aec2f747 | 264 | } |
6d012f14 | 265 | TUI_DISASM_WIN->generic.content_size = i; |
aec2f747 SC |
266 | return TUI_SUCCESS; |
267 | } | |
c906108c SS |
268 | |
269 | ||
1cc6d956 | 270 | /* Function to display the disassembly window with disassembled code. */ |
c906108c | 271 | void |
6ba8e26f | 272 | tui_show_disassem (CORE_ADDR start_addr) |
c906108c | 273 | { |
6ba8e26f | 274 | struct symtab *s = find_pc_symtab (start_addr); |
5b6fe301 | 275 | struct tui_win_info *win_with_focus = tui_win_with_focus (); |
362c05fe | 276 | struct tui_line_or_address val; |
c906108c | 277 | |
362c05fe AS |
278 | val.loa = LOA_ADDRESS; |
279 | val.u.addr = start_addr; | |
080ce8c0 | 280 | tui_add_win_to_layout (DISASSEM_WIN); |
6d012f14 | 281 | tui_update_source_window (TUI_DISASM_WIN, s, val, FALSE); |
ef5eab5a MS |
282 | |
283 | /* If the focus was in the src win, put it in the asm win, if the | |
284 | source view isn't split. */ | |
e5908723 MS |
285 | if (tui_current_layout () != SRC_DISASSEM_COMMAND |
286 | && 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; |
362c05fe | 383 | struct tui_line_or_address val; |
aefc7064 | 384 | int dir; |
c906108c | 385 | |
6d012f14 | 386 | content = (tui_win_content) TUI_DISASM_WIN->generic.content; |
c906108c | 387 | |
362c05fe | 388 | pc = content[0]->which_element.source.line_or_addr.u.addr; |
aefc7064 PA |
389 | num_to_scroll++; |
390 | dir = (scroll_direction == FORWARD_SCROLL) ? num_to_scroll : -num_to_scroll; | |
c906108c | 391 | |
362c05fe AS |
392 | val.loa = LOA_ADDRESS; |
393 | val.u.addr = tui_find_disassembly_address (pc, dir); | |
aefc7064 | 394 | tui_update_source_window_as_is (TUI_DISASM_WIN, NULL, val, FALSE); |
aec2f747 SC |
395 | } |
396 | } |