Commit | Line | Data |
---|---|---|
f377b406 | 1 | /* Disassembly display. |
f33c6cbf | 2 | |
42a4f53d | 3 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
957b8b5a | 23 | #include "arch-utils.h" |
c906108c SS |
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" |
d7b2e967 | 30 | #include "tui/tui.h" |
6d7fd9aa | 31 | #include "tui/tui-command.h" |
d7b2e967 AC |
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" |
bfad4537 | 39 | #include "tui/tui-source.h" |
6c95b8df | 40 | #include "progspace.h" |
77e371c0 | 41 | #include "objfiles.h" |
c906108c | 42 | |
6a83354a | 43 | #include "gdb_curses.h" |
96ec9981 | 44 | |
aec2f747 SC |
45 | struct tui_asm_line |
46 | { | |
47 | CORE_ADDR addr; | |
6b915f7d TT |
48 | std::string addr_string; |
49 | std::string insn; | |
aec2f747 SC |
50 | }; |
51 | ||
52 | /* Function to set the disassembly window's content. | |
53 | Disassemble count lines starting at pc. | |
54 | Return address of the count'th instruction after pc. */ | |
55 | static CORE_ADDR | |
6b915f7d TT |
56 | tui_disassemble (struct gdbarch *gdbarch, |
57 | std::vector<tui_asm_line> &asm_lines, | |
58 | CORE_ADDR pc, int pos, int count) | |
aec2f747 | 59 | { |
d7e74731 | 60 | string_file gdb_dis_out; |
aec2f747 | 61 | |
1cc6d956 | 62 | /* Now construct each line. */ |
6b915f7d | 63 | for (int i = 0; i < count; ++i) |
aec2f747 | 64 | { |
d7e74731 | 65 | print_address (gdbarch, pc, &gdb_dis_out); |
6b915f7d TT |
66 | asm_lines[pos + i].addr = pc; |
67 | asm_lines[pos + i].addr_string = std::move (gdb_dis_out.string ()); | |
aec2f747 | 68 | |
d7e74731 | 69 | gdb_dis_out.clear (); |
aec2f747 | 70 | |
d7e74731 | 71 | pc = pc + gdb_print_insn (gdbarch, pc, &gdb_dis_out, NULL); |
aec2f747 | 72 | |
6b915f7d | 73 | asm_lines[pos + i].insn = std::move (gdb_dis_out.string ()); |
aec2f747 | 74 | |
1cc6d956 | 75 | /* Reset the buffer to empty. */ |
d7e74731 | 76 | gdb_dis_out.clear (); |
aec2f747 | 77 | } |
aec2f747 SC |
78 | return pc; |
79 | } | |
80 | ||
1cc6d956 MS |
81 | /* Find the disassembly address that corresponds to FROM lines above |
82 | or below the PC. Variable sized instructions are taken into | |
83 | account by the algorithm. */ | |
aec2f747 | 84 | static CORE_ADDR |
13274fc3 | 85 | tui_find_disassembly_address (struct gdbarch *gdbarch, CORE_ADDR pc, int from) |
aec2f747 | 86 | { |
d02c80cd | 87 | CORE_ADDR new_low; |
6ba8e26f | 88 | int max_lines; |
aec2f747 | 89 | |
6ba8e26f AC |
90 | max_lines = (from > 0) ? from : - from; |
91 | if (max_lines <= 1) | |
6b915f7d | 92 | return pc; |
aec2f747 | 93 | |
6b915f7d | 94 | std::vector<tui_asm_line> asm_lines (max_lines); |
aec2f747 | 95 | |
6ba8e26f | 96 | new_low = pc; |
aec2f747 SC |
97 | if (from > 0) |
98 | { | |
6b915f7d | 99 | tui_disassemble (gdbarch, asm_lines, pc, 0, max_lines); |
4cfcaf21 | 100 | new_low = asm_lines[max_lines - 1].addr; |
aec2f747 SC |
101 | } |
102 | else | |
103 | { | |
104 | CORE_ADDR last_addr; | |
105 | int pos; | |
77e371c0 | 106 | struct bound_minimal_symbol msymbol; |
aec2f747 | 107 | |
1cc6d956 MS |
108 | /* Find backward an address which is a symbol and for which |
109 | disassembling from that address will fill completely the | |
110 | window. */ | |
6ba8e26f | 111 | pos = max_lines - 1; |
aec2f747 | 112 | do { |
6ba8e26f | 113 | new_low -= 1 * max_lines; |
77e371c0 | 114 | msymbol = lookup_minimal_symbol_by_pc_section (new_low, 0); |
aec2f747 | 115 | |
77e371c0 TT |
116 | if (msymbol.minsym) |
117 | new_low = BMSYMBOL_VALUE_ADDRESS (msymbol); | |
aec2f747 | 118 | else |
6ba8e26f | 119 | new_low += 1 * max_lines; |
aec2f747 | 120 | |
6b915f7d | 121 | tui_disassemble (gdbarch, asm_lines, new_low, 0, max_lines); |
4cfcaf21 | 122 | last_addr = asm_lines[pos].addr; |
77e371c0 | 123 | } while (last_addr > pc && msymbol.minsym); |
aec2f747 | 124 | |
1cc6d956 MS |
125 | /* Scan forward disassembling one instruction at a time until |
126 | the last visible instruction of the window matches the pc. | |
127 | We keep the disassembled instructions in the 'lines' window | |
128 | and shift it downward (increasing its addresses). */ | |
aec2f747 SC |
129 | if (last_addr < pc) |
130 | do | |
131 | { | |
132 | CORE_ADDR next_addr; | |
133 | ||
134 | pos++; | |
6ba8e26f | 135 | if (pos >= max_lines) |
aec2f747 SC |
136 | pos = 0; |
137 | ||
6b915f7d TT |
138 | next_addr = tui_disassemble (gdbarch, asm_lines, |
139 | last_addr, pos, 1); | |
aec2f747 SC |
140 | |
141 | /* If there are some problems while disassembling exit. */ | |
142 | if (next_addr <= last_addr) | |
143 | break; | |
144 | last_addr = next_addr; | |
145 | } while (last_addr <= pc); | |
146 | pos++; | |
6ba8e26f | 147 | if (pos >= max_lines) |
aec2f747 | 148 | pos = 0; |
4cfcaf21 | 149 | new_low = asm_lines[pos].addr; |
aec2f747 | 150 | } |
6ba8e26f | 151 | return new_low; |
aec2f747 SC |
152 | } |
153 | ||
154 | /* Function to set the disassembly window's content. */ | |
65f05602 | 155 | enum tui_status |
81c82c4b TT |
156 | tui_disasm_window::set_contents (struct gdbarch *arch, |
157 | struct symtab *s, | |
158 | struct tui_line_or_address line_or_addr) | |
c906108c | 159 | { |
d02c80cd | 160 | int i; |
81c82c4b | 161 | int offset = horizontal_offset; |
0bb65f1e | 162 | int max_lines, line_width; |
aec2f747 | 163 | CORE_ADDR cur_pc; |
3add462f | 164 | struct tui_locator_window *locator = tui_locator_win_info_ptr (); |
7806cea7 | 165 | int tab_len = tui_tab_width; |
aec2f747 | 166 | int insn_pos; |
f5396833 | 167 | int addr_size, insn_size; |
aec2f747 | 168 | |
81c82c4b TT |
169 | gdb_assert (line_or_addr.loa == LOA_ADDRESS); |
170 | CORE_ADDR pc = line_or_addr.u.addr; | |
aec2f747 SC |
171 | if (pc == 0) |
172 | return TUI_FAILURE; | |
173 | ||
81c82c4b TT |
174 | gdbarch = arch; |
175 | start_line_or_addr.loa = LOA_ADDRESS; | |
176 | start_line_or_addr.u.addr = pc; | |
3add462f | 177 | cur_pc = locator->addr; |
aec2f747 | 178 | |
0bb65f1e | 179 | /* Window size, excluding highlight box. */ |
81c82c4b | 180 | max_lines = height - 2; |
398fdd60 | 181 | line_width = width - TUI_EXECINFO_SIZE - 2; |
aec2f747 SC |
182 | |
183 | /* Get temporary table that will hold all strings (addr & insn). */ | |
6b915f7d | 184 | std::vector<tui_asm_line> asm_lines (max_lines); |
aec2f747 | 185 | |
6b915f7d | 186 | tui_disassemble (gdbarch, asm_lines, pc, 0, max_lines); |
aec2f747 | 187 | |
f5396833 | 188 | /* Determine maximum address- and instruction lengths. */ |
aec2f747 | 189 | addr_size = 0; |
f5396833 | 190 | insn_size = 0; |
6ba8e26f | 191 | for (i = 0; i < max_lines; i++) |
c906108c | 192 | { |
6b915f7d | 193 | size_t len = asm_lines[i].addr_string.size (); |
1c5313c5 | 194 | |
aec2f747 SC |
195 | if (len > addr_size) |
196 | addr_size = len; | |
c906108c | 197 | |
6b915f7d | 198 | len = asm_lines[i].insn.size (); |
f5396833 AA |
199 | if (len > insn_size) |
200 | insn_size = len; | |
c906108c | 201 | } |
aec2f747 | 202 | |
f5396833 | 203 | /* Align instructions to the same column. */ |
aec2f747 SC |
204 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; |
205 | ||
1cc6d956 | 206 | /* Now construct each line. */ |
81c82c4b | 207 | content.resize (max_lines); |
6ba8e26f | 208 | for (i = 0; i < max_lines; i++) |
aec2f747 | 209 | { |
81c82c4b | 210 | tui_source_element *src = &content[i]; |
6b915f7d TT |
211 | |
212 | std::string line | |
213 | = (asm_lines[i].addr_string | |
214 | + n_spaces (insn_pos | |
215 | - asm_lines[i].addr_string.size ()) | |
216 | + asm_lines[i].insn); | |
aec2f747 | 217 | |
1cc6d956 | 218 | /* Now copy the line taking the offset into account. */ |
5d051055 TT |
219 | if (line.size () > offset) |
220 | src->line = line.substr (offset, line_width); | |
aec2f747 | 221 | else |
5d051055 | 222 | src->line.clear (); |
aec2f747 | 223 | |
362c05fe AS |
224 | src->line_or_addr.loa = LOA_ADDRESS; |
225 | src->line_or_addr.u.addr = asm_lines[i].addr; | |
4cfcaf21 | 226 | src->is_exec_point = asm_lines[i].addr == cur_pc; |
aec2f747 | 227 | } |
aec2f747 SC |
228 | return TUI_SUCCESS; |
229 | } | |
c906108c SS |
230 | |
231 | ||
1cc6d956 | 232 | /* Function to display the disassembly window with disassembled code. */ |
c906108c | 233 | void |
13274fc3 | 234 | tui_show_disassem (struct gdbarch *gdbarch, CORE_ADDR start_addr) |
c906108c | 235 | { |
34248c3a | 236 | struct symtab *s = find_pc_line_symtab (start_addr); |
5b6fe301 | 237 | struct tui_win_info *win_with_focus = tui_win_with_focus (); |
362c05fe | 238 | struct tui_line_or_address val; |
c906108c | 239 | |
2d83e710 | 240 | gdb_assert (TUI_DISASM_WIN != nullptr && TUI_DISASM_WIN->is_visible ()); |
22c3f490 | 241 | |
362c05fe AS |
242 | val.loa = LOA_ADDRESS; |
243 | val.u.addr = start_addr; | |
017f9828 | 244 | TUI_DISASM_WIN->update_source_window (gdbarch, s, val); |
ef5eab5a MS |
245 | |
246 | /* If the focus was in the src win, put it in the asm win, if the | |
247 | source view isn't split. */ | |
e5908723 MS |
248 | if (tui_current_layout () != SRC_DISASSEM_COMMAND |
249 | && win_with_focus == TUI_SRC_WIN) | |
6d012f14 | 250 | tui_set_win_focus_to (TUI_DISASM_WIN); |
65f05602 | 251 | } |
c906108c SS |
252 | |
253 | ||
1cc6d956 | 254 | /* Function to display the disassembly window. */ |
c906108c | 255 | void |
13274fc3 UW |
256 | tui_show_disassem_and_update_source (struct gdbarch *gdbarch, |
257 | CORE_ADDR start_addr) | |
c906108c SS |
258 | { |
259 | struct symtab_and_line sal; | |
260 | ||
13274fc3 | 261 | tui_show_disassem (gdbarch, start_addr); |
dd1abb8c | 262 | if (tui_current_layout () == SRC_DISASSEM_COMMAND) |
c906108c | 263 | { |
362c05fe | 264 | struct tui_line_or_address val; |
aec2f747 | 265 | |
ef5eab5a MS |
266 | /* Update what is in the source window if it is displayed too, |
267 | note that it follows what is in the disassembly window and | |
268 | visa-versa. */ | |
6ba8e26f | 269 | sal = find_pc_line (start_addr, 0); |
362c05fe AS |
270 | val.loa = LOA_LINE; |
271 | val.u.line_no = sal.line; | |
017f9828 | 272 | TUI_SRC_WIN->update_source_window (gdbarch, sal.symtab, val); |
3024f13a SC |
273 | if (sal.symtab) |
274 | { | |
51abb421 | 275 | set_current_source_symtab_and_line (sal); |
56d397a3 | 276 | tui_update_locator_fullname (symtab_to_fullname (sal.symtab)); |
3024f13a SC |
277 | } |
278 | else | |
56d397a3 | 279 | tui_update_locator_fullname ("?"); |
c906108c | 280 | } |
65f05602 | 281 | } |
c906108c | 282 | |
13274fc3 UW |
283 | void |
284 | tui_get_begin_asm_address (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p) | |
c906108c | 285 | { |
3add462f | 286 | struct tui_locator_window *locator; |
957b8b5a | 287 | struct gdbarch *gdbarch = get_current_arch (); |
c774cec6 | 288 | CORE_ADDR addr; |
c906108c | 289 | |
dd1abb8c | 290 | locator = tui_locator_win_info_ptr (); |
c906108c | 291 | |
3add462f | 292 | if (locator->addr == 0) |
c906108c | 293 | { |
3b7344d5 | 294 | struct bound_minimal_symbol main_symbol; |
0510ab86 SC |
295 | |
296 | /* Find address of the start of program. | |
297 | Note: this should be language specific. */ | |
298 | main_symbol = lookup_minimal_symbol ("main", NULL, NULL); | |
3b7344d5 | 299 | if (main_symbol.minsym == 0) |
0510ab86 | 300 | main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); |
3b7344d5 | 301 | if (main_symbol.minsym == 0) |
0510ab86 | 302 | main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); |
3b7344d5 | 303 | if (main_symbol.minsym) |
77e371c0 | 304 | addr = BMSYMBOL_VALUE_ADDRESS (main_symbol); |
0510ab86 SC |
305 | else |
306 | addr = 0; | |
c906108c | 307 | } |
1cc6d956 | 308 | else /* The target is executing. */ |
13274fc3 | 309 | { |
3add462f TT |
310 | gdbarch = locator->gdbarch; |
311 | addr = locator->addr; | |
13274fc3 | 312 | } |
c906108c | 313 | |
13274fc3 UW |
314 | *gdbarch_p = gdbarch; |
315 | *addr_p = addr; | |
65f05602 | 316 | } |
c906108c | 317 | |
77cad3ba | 318 | /* Determine what the low address will be to display in the TUI's |
1cc6d956 MS |
319 | disassembly window. This may or may not be the same as the low |
320 | address input. */ | |
77cad3ba | 321 | CORE_ADDR |
13274fc3 UW |
322 | tui_get_low_disassembly_address (struct gdbarch *gdbarch, |
323 | CORE_ADDR low, CORE_ADDR pc) | |
77cad3ba SC |
324 | { |
325 | int pos; | |
326 | ||
1cc6d956 MS |
327 | /* Determine where to start the disassembly so that the pc is about |
328 | in the middle of the viewport. */ | |
6d7fd9aa TT |
329 | if (tui_win_list[DISASSEM_WIN] != NULL) |
330 | pos = tui_win_list[DISASSEM_WIN]->height; | |
331 | else if (TUI_CMD_WIN == NULL) | |
332 | pos = tui_term_height () / 2 - 2; | |
333 | else | |
334 | pos = tui_term_height () - TUI_CMD_WIN->height - 2; | |
335 | pos = (pos - 2) / 2; | |
336 | ||
13274fc3 | 337 | pc = tui_find_disassembly_address (gdbarch, pc, -pos); |
77cad3ba SC |
338 | |
339 | if (pc < low) | |
340 | pc = low; | |
341 | return pc; | |
342 | } | |
343 | ||
65f05602 | 344 | /* Scroll the disassembly forward or backward vertically. */ |
c906108c | 345 | void |
c3bd716f | 346 | tui_disasm_window::do_scroll_vertical (int num_to_scroll) |
c906108c | 347 | { |
53e7cdba | 348 | if (!content.empty ()) |
c906108c | 349 | { |
aec2f747 | 350 | CORE_ADDR pc; |
362c05fe | 351 | struct tui_line_or_address val; |
c906108c | 352 | |
53e7cdba | 353 | pc = content[0].line_or_addr.u.addr; |
c3bd716f TT |
354 | if (num_to_scroll >= 0) |
355 | num_to_scroll++; | |
356 | else | |
357 | --num_to_scroll; | |
c906108c | 358 | |
362c05fe | 359 | val.loa = LOA_ADDRESS; |
c3bd716f | 360 | val.u.addr = tui_find_disassembly_address (gdbarch, pc, num_to_scroll); |
ed8358e9 | 361 | update_source_window_as_is (gdbarch, NULL, val); |
aec2f747 SC |
362 | } |
363 | } | |
c2cd8994 TT |
364 | |
365 | bool | |
366 | tui_disasm_window::location_matches_p (struct bp_location *loc, int line_no) | |
367 | { | |
368 | return (content[line_no].line_or_addr.loa == LOA_ADDRESS | |
369 | && content[line_no].line_or_addr.u.addr == loc->address); | |
370 | } | |
a54700c6 | 371 | |
088f37dd TT |
372 | bool |
373 | tui_disasm_window::addr_is_displayed (CORE_ADDR addr) const | |
374 | { | |
375 | bool is_displayed = false; | |
376 | int threshold = SCROLL_THRESHOLD; | |
377 | ||
378 | int i = 0; | |
379 | while (i < content.size () - threshold && !is_displayed) | |
380 | { | |
381 | is_displayed | |
382 | = (content[i].line_or_addr.loa == LOA_ADDRESS | |
383 | && content[i].line_or_addr.u.addr == addr); | |
384 | i++; | |
385 | } | |
386 | ||
387 | return is_displayed; | |
388 | } | |
389 | ||
a54700c6 TT |
390 | void |
391 | tui_disasm_window::maybe_update (struct frame_info *fi, symtab_and_line sal, | |
392 | int line_no, CORE_ADDR addr) | |
393 | { | |
394 | CORE_ADDR low; | |
395 | ||
396 | if (find_pc_partial_function (get_frame_pc (fi), | |
397 | NULL, &low, NULL) == 0) | |
398 | { | |
399 | /* There is no symbol available for current PC. There is no | |
400 | safe way how to "disassemble backwards". */ | |
401 | low = get_frame_pc (fi); | |
402 | } | |
403 | else | |
404 | low = tui_get_low_disassembly_address (get_frame_arch (fi), | |
405 | low, get_frame_pc (fi)); | |
406 | ||
407 | struct tui_line_or_address a; | |
408 | ||
409 | a.loa = LOA_ADDRESS; | |
410 | a.u.addr = low; | |
088f37dd | 411 | if (!addr_is_displayed (addr)) |
017f9828 | 412 | update_source_window (get_frame_arch (fi), sal.symtab, a); |
a54700c6 TT |
413 | else |
414 | { | |
415 | a.u.addr = addr; | |
416 | set_is_exec_point_at (a); | |
417 | } | |
418 | } |