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Commit | Line | Data |
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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; | |
46 | char* addr_string; | |
47 | char* insn; | |
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 | |
4cfcaf21 | 54 | tui_disassemble (struct tui_asm_line* asm_lines, CORE_ADDR pc, int count) |
aec2f747 SC |
55 | { |
56 | struct ui_file *gdb_dis_out; | |
c906108c | 57 | |
aec2f747 SC |
58 | /* now init the ui_file structure */ |
59 | gdb_dis_out = tui_sfileopen (256); | |
60 | ||
aec2f747 | 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 | ||
92bf2b80 | 75 | pc = pc + gdb_print_insn (pc, gdb_dis_out); |
aec2f747 | 76 | |
4cfcaf21 | 77 | asm_lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); |
aec2f747 SC |
78 | |
79 | /* reset the buffer to empty */ | |
80 | ui_file_rewind (gdb_dis_out); | |
81 | } | |
82 | ui_file_delete (gdb_dis_out); | |
83 | return pc; | |
84 | } | |
85 | ||
86 | /* Find the disassembly address that corresponds to FROM lines | |
87 | above or below the PC. Variable sized instructions are taken | |
88 | into account by the algorithm. */ | |
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; |
4cfcaf21 | 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; | |
115 | struct minimal_symbol* msymbol; | |
116 | ||
117 | /* Find backward an address which is a symbol | |
118 | and for which disassembling from that address will fill | |
119 | completely the 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 | ||
134 | /* Scan forward disassembling one instruction at a time | |
135 | until the last visible instruction of the window | |
136 | matches the pc. We keep the disassembled instructions | |
137 | in the 'lines' window and shift it downward (increasing | |
138 | its addresses). */ | |
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; |
2a8854a7 | 177 | struct tui_gen_win_info * locator = tui_locator_win_info_ptr (); |
dd1abb8c | 178 | int tab_len = tui_default_tab_len (); |
4cfcaf21 | 179 | struct tui_asm_line* asm_lines; |
aec2f747 SC |
180 | int insn_pos; |
181 | int addr_size, max_size; | |
182 | char* line; | |
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 | |
6ba8e26f | 196 | max_lines = TUI_DISASM_WIN->generic.height - 2; /* account for 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 | ||
226 | /* Now construct each line */ | |
6ba8e26f | 227 | for (i = 0; i < max_lines; i++) |
aec2f747 | 228 | { |
2a8854a7 AC |
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 SC |
237 | |
238 | /* Add spaces to make the instructions start on the same 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 SC |
246 | |
247 | /* Now copy the line taking the offset into account */ | |
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 | ||
65f05602 | 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 AC |
273 | struct symtab *s = find_pc_symtab (start_addr); |
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); |
c906108c | 281 | /* |
c5aa993b JM |
282 | ** if the focus was in the src win, put it in the asm win, if the |
283 | ** source view isn't split | |
284 | */ | |
6ba8e26f | 285 | if (tui_current_layout () != SRC_DISASSEM_COMMAND && 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 | ||
65f05602 | 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 | |
c906108c | 303 | /* |
c5aa993b JM |
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 visa-versa | |
306 | */ | |
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 | { |
2a8854a7 AC |
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 SS |
348 | } |
349 | else /* the target is executing */ | |
350 | addr = element->addr; | |
351 | ||
352 | return addr; | |
65f05602 | 353 | } |
c906108c | 354 | |
77cad3ba SC |
355 | /* Determine what the low address will be to display in the TUI's |
356 | disassembly window. This may or may not be the same as the | |
357 | low address input. */ | |
358 | CORE_ADDR | |
22940a24 | 359 | tui_get_low_disassembly_address (CORE_ADDR low, CORE_ADDR pc) |
77cad3ba SC |
360 | { |
361 | int pos; | |
362 | ||
363 | /* Determine where to start the disassembly so that the pc is about in the | |
364 | 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) |
f70a7d61 | 389 | s = find_pc_symtab (get_frame_pc (deprecated_selected_frame)); |
c906108c | 390 | else |
52575520 | 391 | s = cursal.symtab; |
c906108c | 392 | |
aec2f747 | 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 | } |