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 AC |
30 | #include "tui/tui.h" |
31 | #include "tui/tui-data.h" | |
32 | #include "tui/tui-win.h" | |
33 | #include "tui/tui-layout.h" | |
34 | #include "tui/tui-winsource.h" | |
35 | #include "tui/tui-stack.h" | |
36 | #include "tui/tui-file.h" | |
2c0b251b | 37 | #include "tui/tui-disasm.h" |
bfad4537 | 38 | #include "tui/tui-source.h" |
6c95b8df | 39 | #include "progspace.h" |
77e371c0 | 40 | #include "objfiles.h" |
c906108c | 41 | |
6a83354a | 42 | #include "gdb_curses.h" |
96ec9981 | 43 | |
aec2f747 SC |
44 | struct tui_asm_line |
45 | { | |
46 | CORE_ADDR addr; | |
6b915f7d TT |
47 | std::string addr_string; |
48 | std::string insn; | |
aec2f747 SC |
49 | }; |
50 | ||
51 | /* Function to set the disassembly window's content. | |
52 | Disassemble count lines starting at pc. | |
53 | Return address of the count'th instruction after pc. */ | |
54 | static CORE_ADDR | |
6b915f7d TT |
55 | tui_disassemble (struct gdbarch *gdbarch, |
56 | std::vector<tui_asm_line> &asm_lines, | |
57 | CORE_ADDR pc, int pos, int count) | |
aec2f747 | 58 | { |
d7e74731 | 59 | string_file gdb_dis_out; |
aec2f747 | 60 | |
1cc6d956 | 61 | /* Now construct each line. */ |
6b915f7d | 62 | for (int i = 0; i < count; ++i) |
aec2f747 | 63 | { |
d7e74731 | 64 | print_address (gdbarch, pc, &gdb_dis_out); |
6b915f7d TT |
65 | asm_lines[pos + i].addr = pc; |
66 | asm_lines[pos + i].addr_string = std::move (gdb_dis_out.string ()); | |
aec2f747 | 67 | |
d7e74731 | 68 | gdb_dis_out.clear (); |
aec2f747 | 69 | |
d7e74731 | 70 | pc = pc + gdb_print_insn (gdbarch, pc, &gdb_dis_out, NULL); |
aec2f747 | 71 | |
6b915f7d | 72 | asm_lines[pos + i].insn = std::move (gdb_dis_out.string ()); |
aec2f747 | 73 | |
1cc6d956 | 74 | /* Reset the buffer to empty. */ |
d7e74731 | 75 | gdb_dis_out.clear (); |
aec2f747 | 76 | } |
aec2f747 SC |
77 | return pc; |
78 | } | |
79 | ||
1cc6d956 MS |
80 | /* Find the disassembly address that corresponds to FROM lines above |
81 | or below the PC. Variable sized instructions are taken into | |
82 | account by the algorithm. */ | |
aec2f747 | 83 | static CORE_ADDR |
13274fc3 | 84 | tui_find_disassembly_address (struct gdbarch *gdbarch, CORE_ADDR pc, int from) |
aec2f747 | 85 | { |
d02c80cd | 86 | CORE_ADDR new_low; |
6ba8e26f | 87 | int max_lines; |
aec2f747 | 88 | |
6ba8e26f AC |
89 | max_lines = (from > 0) ? from : - from; |
90 | if (max_lines <= 1) | |
6b915f7d | 91 | return pc; |
aec2f747 | 92 | |
6b915f7d | 93 | std::vector<tui_asm_line> asm_lines (max_lines); |
aec2f747 | 94 | |
6ba8e26f | 95 | new_low = pc; |
aec2f747 SC |
96 | if (from > 0) |
97 | { | |
6b915f7d | 98 | tui_disassemble (gdbarch, asm_lines, pc, 0, max_lines); |
4cfcaf21 | 99 | new_low = asm_lines[max_lines - 1].addr; |
aec2f747 SC |
100 | } |
101 | else | |
102 | { | |
103 | CORE_ADDR last_addr; | |
104 | int pos; | |
77e371c0 | 105 | struct bound_minimal_symbol msymbol; |
aec2f747 | 106 | |
1cc6d956 MS |
107 | /* Find backward an address which is a symbol and for which |
108 | disassembling from that address will fill completely the | |
109 | window. */ | |
6ba8e26f | 110 | pos = max_lines - 1; |
aec2f747 | 111 | do { |
6ba8e26f | 112 | new_low -= 1 * max_lines; |
77e371c0 | 113 | msymbol = lookup_minimal_symbol_by_pc_section (new_low, 0); |
aec2f747 | 114 | |
77e371c0 TT |
115 | if (msymbol.minsym) |
116 | new_low = BMSYMBOL_VALUE_ADDRESS (msymbol); | |
aec2f747 | 117 | else |
6ba8e26f | 118 | new_low += 1 * max_lines; |
aec2f747 | 119 | |
6b915f7d | 120 | tui_disassemble (gdbarch, asm_lines, new_low, 0, max_lines); |
4cfcaf21 | 121 | last_addr = asm_lines[pos].addr; |
77e371c0 | 122 | } while (last_addr > pc && msymbol.minsym); |
aec2f747 | 123 | |
1cc6d956 MS |
124 | /* Scan forward disassembling one instruction at a time until |
125 | the last visible instruction of the window matches the pc. | |
126 | We keep the disassembled instructions in the 'lines' window | |
127 | and shift it downward (increasing its addresses). */ | |
aec2f747 SC |
128 | if (last_addr < pc) |
129 | do | |
130 | { | |
131 | CORE_ADDR next_addr; | |
132 | ||
133 | pos++; | |
6ba8e26f | 134 | if (pos >= max_lines) |
aec2f747 SC |
135 | pos = 0; |
136 | ||
6b915f7d TT |
137 | next_addr = tui_disassemble (gdbarch, asm_lines, |
138 | last_addr, pos, 1); | |
aec2f747 SC |
139 | |
140 | /* If there are some problems while disassembling exit. */ | |
141 | if (next_addr <= last_addr) | |
142 | break; | |
143 | last_addr = next_addr; | |
144 | } while (last_addr <= pc); | |
145 | pos++; | |
6ba8e26f | 146 | if (pos >= max_lines) |
aec2f747 | 147 | pos = 0; |
4cfcaf21 | 148 | new_low = asm_lines[pos].addr; |
aec2f747 | 149 | } |
6ba8e26f | 150 | return new_low; |
aec2f747 SC |
151 | } |
152 | ||
153 | /* Function to set the disassembly window's content. */ | |
65f05602 | 154 | enum tui_status |
81c82c4b TT |
155 | tui_disasm_window::set_contents (struct gdbarch *arch, |
156 | struct symtab *s, | |
157 | struct tui_line_or_address line_or_addr) | |
c906108c | 158 | { |
d02c80cd | 159 | int i; |
81c82c4b | 160 | int offset = horizontal_offset; |
0bb65f1e | 161 | int max_lines, line_width; |
aec2f747 | 162 | CORE_ADDR cur_pc; |
3add462f | 163 | struct tui_locator_window *locator = tui_locator_win_info_ptr (); |
7806cea7 | 164 | int tab_len = tui_tab_width; |
aec2f747 | 165 | int insn_pos; |
f5396833 | 166 | int addr_size, insn_size; |
aec2f747 | 167 | |
81c82c4b TT |
168 | gdb_assert (line_or_addr.loa == LOA_ADDRESS); |
169 | CORE_ADDR pc = line_or_addr.u.addr; | |
aec2f747 SC |
170 | if (pc == 0) |
171 | return TUI_FAILURE; | |
172 | ||
81c82c4b TT |
173 | gdbarch = arch; |
174 | start_line_or_addr.loa = LOA_ADDRESS; | |
175 | start_line_or_addr.u.addr = pc; | |
3add462f | 176 | cur_pc = locator->addr; |
aec2f747 | 177 | |
0bb65f1e | 178 | /* Window size, excluding highlight box. */ |
81c82c4b | 179 | max_lines = height - 2; |
398fdd60 | 180 | line_width = width - TUI_EXECINFO_SIZE - 2; |
aec2f747 SC |
181 | |
182 | /* Get temporary table that will hold all strings (addr & insn). */ | |
6b915f7d | 183 | std::vector<tui_asm_line> asm_lines (max_lines); |
aec2f747 | 184 | |
6b915f7d | 185 | tui_disassemble (gdbarch, asm_lines, pc, 0, max_lines); |
aec2f747 | 186 | |
f5396833 | 187 | /* Determine maximum address- and instruction lengths. */ |
aec2f747 | 188 | addr_size = 0; |
f5396833 | 189 | insn_size = 0; |
6ba8e26f | 190 | for (i = 0; i < max_lines; i++) |
c906108c | 191 | { |
6b915f7d | 192 | size_t len = asm_lines[i].addr_string.size (); |
1c5313c5 | 193 | |
aec2f747 SC |
194 | if (len > addr_size) |
195 | addr_size = len; | |
c906108c | 196 | |
6b915f7d | 197 | len = asm_lines[i].insn.size (); |
f5396833 AA |
198 | if (len > insn_size) |
199 | insn_size = len; | |
c906108c | 200 | } |
aec2f747 | 201 | |
f5396833 | 202 | /* Align instructions to the same column. */ |
aec2f747 SC |
203 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; |
204 | ||
1cc6d956 | 205 | /* Now construct each line. */ |
81c82c4b | 206 | content.resize (max_lines); |
6ba8e26f | 207 | for (i = 0; i < max_lines; i++) |
aec2f747 | 208 | { |
81c82c4b | 209 | tui_source_element *src = &content[i]; |
6b915f7d TT |
210 | |
211 | std::string line | |
212 | = (asm_lines[i].addr_string | |
213 | + n_spaces (insn_pos | |
214 | - asm_lines[i].addr_string.size ()) | |
215 | + asm_lines[i].insn); | |
aec2f747 | 216 | |
1cc6d956 | 217 | /* Now copy the line taking the offset into account. */ |
6b915f7d | 218 | if (line.size() > offset) |
f14bec58 | 219 | src->line.reset (xstrndup (&line[offset], line_width)); |
aec2f747 | 220 | else |
f074b67e | 221 | src->line = make_unique_xstrdup (""); |
aec2f747 | 222 | |
362c05fe AS |
223 | src->line_or_addr.loa = LOA_ADDRESS; |
224 | src->line_or_addr.u.addr = asm_lines[i].addr; | |
4cfcaf21 | 225 | src->is_exec_point = asm_lines[i].addr == cur_pc; |
aec2f747 | 226 | } |
aec2f747 SC |
227 | return TUI_SUCCESS; |
228 | } | |
c906108c SS |
229 | |
230 | ||
1cc6d956 | 231 | /* Function to display the disassembly window with disassembled code. */ |
c906108c | 232 | void |
13274fc3 | 233 | tui_show_disassem (struct gdbarch *gdbarch, CORE_ADDR start_addr) |
c906108c | 234 | { |
34248c3a | 235 | struct symtab *s = find_pc_line_symtab (start_addr); |
5b6fe301 | 236 | struct tui_win_info *win_with_focus = tui_win_with_focus (); |
362c05fe | 237 | struct tui_line_or_address val; |
c906108c | 238 | |
2d83e710 | 239 | gdb_assert (TUI_DISASM_WIN != nullptr && TUI_DISASM_WIN->is_visible ()); |
22c3f490 | 240 | |
362c05fe AS |
241 | val.loa = LOA_ADDRESS; |
242 | val.u.addr = start_addr; | |
017f9828 | 243 | TUI_DISASM_WIN->update_source_window (gdbarch, s, val); |
ef5eab5a MS |
244 | |
245 | /* If the focus was in the src win, put it in the asm win, if the | |
246 | source view isn't split. */ | |
e5908723 MS |
247 | if (tui_current_layout () != SRC_DISASSEM_COMMAND |
248 | && win_with_focus == TUI_SRC_WIN) | |
6d012f14 | 249 | tui_set_win_focus_to (TUI_DISASM_WIN); |
65f05602 | 250 | } |
c906108c SS |
251 | |
252 | ||
1cc6d956 | 253 | /* Function to display the disassembly window. */ |
c906108c | 254 | void |
13274fc3 UW |
255 | tui_show_disassem_and_update_source (struct gdbarch *gdbarch, |
256 | CORE_ADDR start_addr) | |
c906108c SS |
257 | { |
258 | struct symtab_and_line sal; | |
259 | ||
13274fc3 | 260 | tui_show_disassem (gdbarch, start_addr); |
dd1abb8c | 261 | if (tui_current_layout () == SRC_DISASSEM_COMMAND) |
c906108c | 262 | { |
362c05fe | 263 | struct tui_line_or_address val; |
aec2f747 | 264 | |
ef5eab5a MS |
265 | /* Update what is in the source window if it is displayed too, |
266 | note that it follows what is in the disassembly window and | |
267 | visa-versa. */ | |
6ba8e26f | 268 | sal = find_pc_line (start_addr, 0); |
362c05fe AS |
269 | val.loa = LOA_LINE; |
270 | val.u.line_no = sal.line; | |
017f9828 | 271 | TUI_SRC_WIN->update_source_window (gdbarch, sal.symtab, val); |
3024f13a SC |
272 | if (sal.symtab) |
273 | { | |
51abb421 | 274 | set_current_source_symtab_and_line (sal); |
56d397a3 | 275 | tui_update_locator_fullname (symtab_to_fullname (sal.symtab)); |
3024f13a SC |
276 | } |
277 | else | |
56d397a3 | 278 | tui_update_locator_fullname ("?"); |
c906108c | 279 | } |
65f05602 | 280 | } |
c906108c | 281 | |
13274fc3 UW |
282 | void |
283 | tui_get_begin_asm_address (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p) | |
c906108c | 284 | { |
3add462f | 285 | struct tui_locator_window *locator; |
957b8b5a | 286 | struct gdbarch *gdbarch = get_current_arch (); |
c774cec6 | 287 | CORE_ADDR addr; |
c906108c | 288 | |
dd1abb8c | 289 | locator = tui_locator_win_info_ptr (); |
c906108c | 290 | |
3add462f | 291 | if (locator->addr == 0) |
c906108c | 292 | { |
3b7344d5 | 293 | struct bound_minimal_symbol main_symbol; |
0510ab86 SC |
294 | |
295 | /* Find address of the start of program. | |
296 | Note: this should be language specific. */ | |
297 | main_symbol = lookup_minimal_symbol ("main", NULL, NULL); | |
3b7344d5 | 298 | if (main_symbol.minsym == 0) |
0510ab86 | 299 | main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); |
3b7344d5 | 300 | if (main_symbol.minsym == 0) |
0510ab86 | 301 | main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); |
3b7344d5 | 302 | if (main_symbol.minsym) |
77e371c0 | 303 | addr = BMSYMBOL_VALUE_ADDRESS (main_symbol); |
0510ab86 SC |
304 | else |
305 | addr = 0; | |
c906108c | 306 | } |
1cc6d956 | 307 | else /* The target is executing. */ |
13274fc3 | 308 | { |
3add462f TT |
309 | gdbarch = locator->gdbarch; |
310 | addr = locator->addr; | |
13274fc3 | 311 | } |
c906108c | 312 | |
13274fc3 UW |
313 | *gdbarch_p = gdbarch; |
314 | *addr_p = addr; | |
65f05602 | 315 | } |
c906108c | 316 | |
77cad3ba | 317 | /* Determine what the low address will be to display in the TUI's |
1cc6d956 MS |
318 | disassembly window. This may or may not be the same as the low |
319 | address input. */ | |
77cad3ba | 320 | CORE_ADDR |
13274fc3 UW |
321 | tui_get_low_disassembly_address (struct gdbarch *gdbarch, |
322 | CORE_ADDR low, CORE_ADDR pc) | |
77cad3ba SC |
323 | { |
324 | int pos; | |
325 | ||
1cc6d956 MS |
326 | /* Determine where to start the disassembly so that the pc is about |
327 | in the middle of the viewport. */ | |
080ce8c0 | 328 | pos = tui_default_win_viewport_height (DISASSEM_WIN, DISASSEM_COMMAND) / 2; |
13274fc3 | 329 | pc = tui_find_disassembly_address (gdbarch, pc, -pos); |
77cad3ba SC |
330 | |
331 | if (pc < low) | |
332 | pc = low; | |
333 | return pc; | |
334 | } | |
335 | ||
65f05602 | 336 | /* Scroll the disassembly forward or backward vertically. */ |
c906108c | 337 | void |
c3bd716f | 338 | tui_disasm_window::do_scroll_vertical (int num_to_scroll) |
c906108c | 339 | { |
53e7cdba | 340 | if (!content.empty ()) |
c906108c | 341 | { |
aec2f747 | 342 | CORE_ADDR pc; |
362c05fe | 343 | struct tui_line_or_address val; |
c906108c | 344 | |
53e7cdba | 345 | pc = content[0].line_or_addr.u.addr; |
c3bd716f TT |
346 | if (num_to_scroll >= 0) |
347 | num_to_scroll++; | |
348 | else | |
349 | --num_to_scroll; | |
c906108c | 350 | |
362c05fe | 351 | val.loa = LOA_ADDRESS; |
c3bd716f | 352 | val.u.addr = tui_find_disassembly_address (gdbarch, pc, num_to_scroll); |
ed8358e9 | 353 | update_source_window_as_is (gdbarch, NULL, val); |
aec2f747 SC |
354 | } |
355 | } | |
c2cd8994 TT |
356 | |
357 | bool | |
358 | tui_disasm_window::location_matches_p (struct bp_location *loc, int line_no) | |
359 | { | |
360 | return (content[line_no].line_or_addr.loa == LOA_ADDRESS | |
361 | && content[line_no].line_or_addr.u.addr == loc->address); | |
362 | } | |
a54700c6 | 363 | |
088f37dd TT |
364 | bool |
365 | tui_disasm_window::addr_is_displayed (CORE_ADDR addr) const | |
366 | { | |
367 | bool is_displayed = false; | |
368 | int threshold = SCROLL_THRESHOLD; | |
369 | ||
370 | int i = 0; | |
371 | while (i < content.size () - threshold && !is_displayed) | |
372 | { | |
373 | is_displayed | |
374 | = (content[i].line_or_addr.loa == LOA_ADDRESS | |
375 | && content[i].line_or_addr.u.addr == addr); | |
376 | i++; | |
377 | } | |
378 | ||
379 | return is_displayed; | |
380 | } | |
381 | ||
a54700c6 TT |
382 | void |
383 | tui_disasm_window::maybe_update (struct frame_info *fi, symtab_and_line sal, | |
384 | int line_no, CORE_ADDR addr) | |
385 | { | |
386 | CORE_ADDR low; | |
387 | ||
388 | if (find_pc_partial_function (get_frame_pc (fi), | |
389 | NULL, &low, NULL) == 0) | |
390 | { | |
391 | /* There is no symbol available for current PC. There is no | |
392 | safe way how to "disassemble backwards". */ | |
393 | low = get_frame_pc (fi); | |
394 | } | |
395 | else | |
396 | low = tui_get_low_disassembly_address (get_frame_arch (fi), | |
397 | low, get_frame_pc (fi)); | |
398 | ||
399 | struct tui_line_or_address a; | |
400 | ||
401 | a.loa = LOA_ADDRESS; | |
402 | a.u.addr = low; | |
088f37dd | 403 | if (!addr_is_displayed (addr)) |
017f9828 | 404 | update_source_window (get_frame_arch (fi), sal.symtab, a); |
a54700c6 TT |
405 | else |
406 | { | |
407 | a.u.addr = addr; | |
408 | set_is_exec_point_at (a); | |
409 | } | |
410 | } |