Commit | Line | Data |
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f377b406 | 1 | /* Disassembly display. |
f33c6cbf AC |
2 | |
3 | Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, | |
4 | Inc. | |
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 | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c | 24 | |
f33c6cbf AC |
25 | /* FIXME: cagney/2002-02-28: The GDB coding standard indicates that |
26 | "defs.h" should be included first. Unfortunatly some systems | |
27 | (currently Debian GNU/Linux) include the <stdbool.h> via <curses.h> | |
28 | and they clash with "bfd.h"'s definiton of true/false. The correct | |
29 | fix is to remove true/false from "bfd.h", however, until that | |
30 | happens, hack around it by including "config.h" and <curses.h> | |
31 | first. */ | |
32 | ||
4e8f7a8b DJ |
33 | #include "config.h" |
34 | #ifdef HAVE_NCURSES_H | |
35 | #include <ncurses.h> | |
36 | #else | |
37 | #ifdef HAVE_CURSES_H | |
38 | #include <curses.h> | |
39 | #endif | |
40 | #endif | |
41 | ||
c906108c SS |
42 | #include "defs.h" |
43 | #include "symtab.h" | |
44 | #include "breakpoint.h" | |
45 | #include "frame.h" | |
fd0407d6 | 46 | #include "value.h" |
52575520 | 47 | #include "source.h" |
c906108c SS |
48 | |
49 | #include "tui.h" | |
50 | #include "tuiData.h" | |
a8080b7f | 51 | #include "tuiWin.h" |
c906108c SS |
52 | #include "tuiLayout.h" |
53 | #include "tuiSourceWin.h" | |
54 | #include "tuiStack.h" | |
a8080b7f | 55 | #include "tui-file.h" |
c906108c | 56 | |
aec2f747 SC |
57 | struct tui_asm_line |
58 | { | |
59 | CORE_ADDR addr; | |
60 | char* addr_string; | |
61 | char* insn; | |
62 | }; | |
63 | ||
64 | /* Function to set the disassembly window's content. | |
65 | Disassemble count lines starting at pc. | |
66 | Return address of the count'th instruction after pc. */ | |
67 | static CORE_ADDR | |
68 | tui_disassemble (struct tui_asm_line* lines, CORE_ADDR pc, int count) | |
69 | { | |
70 | struct ui_file *gdb_dis_out; | |
c906108c | 71 | |
aec2f747 SC |
72 | /* now init the ui_file structure */ |
73 | gdb_dis_out = tui_sfileopen (256); | |
74 | ||
aec2f747 SC |
75 | /* Now construct each line */ |
76 | for (; count > 0; count--, lines++) | |
77 | { | |
78 | if (lines->addr_string) | |
79 | xfree (lines->addr_string); | |
80 | if (lines->insn) | |
81 | xfree (lines->insn); | |
82 | ||
83 | print_address (pc, gdb_dis_out); | |
84 | lines->addr = pc; | |
85 | lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
86 | ||
87 | ui_file_rewind (gdb_dis_out); | |
88 | ||
92bf2b80 | 89 | pc = pc + gdb_print_insn (pc, gdb_dis_out); |
aec2f747 SC |
90 | |
91 | lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
92 | ||
93 | /* reset the buffer to empty */ | |
94 | ui_file_rewind (gdb_dis_out); | |
95 | } | |
96 | ui_file_delete (gdb_dis_out); | |
97 | return pc; | |
98 | } | |
99 | ||
100 | /* Find the disassembly address that corresponds to FROM lines | |
101 | above or below the PC. Variable sized instructions are taken | |
102 | into account by the algorithm. */ | |
103 | static CORE_ADDR | |
104 | tui_find_disassembly_address (CORE_ADDR pc, int from) | |
105 | { | |
106 | register CORE_ADDR newLow; | |
107 | int maxLines; | |
108 | int i; | |
109 | struct tui_asm_line* lines; | |
110 | ||
111 | maxLines = (from > 0) ? from : - from; | |
112 | if (maxLines <= 1) | |
113 | return pc; | |
114 | ||
115 | lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) | |
116 | * maxLines); | |
117 | memset (lines, 0, sizeof (struct tui_asm_line) * maxLines); | |
118 | ||
119 | newLow = pc; | |
120 | if (from > 0) | |
121 | { | |
122 | tui_disassemble (lines, pc, maxLines); | |
123 | newLow = lines[maxLines - 1].addr; | |
124 | } | |
125 | else | |
126 | { | |
127 | CORE_ADDR last_addr; | |
128 | int pos; | |
129 | struct minimal_symbol* msymbol; | |
130 | ||
131 | /* Find backward an address which is a symbol | |
132 | and for which disassembling from that address will fill | |
133 | completely the window. */ | |
134 | pos = maxLines - 1; | |
135 | do { | |
136 | newLow -= 1 * maxLines; | |
137 | msymbol = lookup_minimal_symbol_by_pc_section (newLow, 0); | |
138 | ||
139 | if (msymbol) | |
140 | newLow = SYMBOL_VALUE_ADDRESS (msymbol); | |
141 | else | |
142 | newLow += 1 * maxLines; | |
143 | ||
144 | tui_disassemble (lines, newLow, maxLines); | |
145 | last_addr = lines[pos].addr; | |
146 | } while (last_addr > pc && msymbol); | |
147 | ||
148 | /* Scan forward disassembling one instruction at a time | |
149 | until the last visible instruction of the window | |
150 | matches the pc. We keep the disassembled instructions | |
151 | in the 'lines' window and shift it downward (increasing | |
152 | its addresses). */ | |
153 | if (last_addr < pc) | |
154 | do | |
155 | { | |
156 | CORE_ADDR next_addr; | |
157 | ||
158 | pos++; | |
159 | if (pos >= maxLines) | |
160 | pos = 0; | |
161 | ||
162 | next_addr = tui_disassemble (&lines[pos], last_addr, 1); | |
163 | ||
164 | /* If there are some problems while disassembling exit. */ | |
165 | if (next_addr <= last_addr) | |
166 | break; | |
167 | last_addr = next_addr; | |
168 | } while (last_addr <= pc); | |
169 | pos++; | |
170 | if (pos >= maxLines) | |
171 | pos = 0; | |
172 | newLow = lines[pos].addr; | |
173 | } | |
174 | for (i = 0; i < maxLines; i++) | |
175 | { | |
176 | xfree (lines[i].addr_string); | |
177 | xfree (lines[i].insn); | |
178 | } | |
179 | return newLow; | |
180 | } | |
181 | ||
182 | /* Function to set the disassembly window's content. */ | |
c906108c | 183 | TuiStatus |
aec2f747 | 184 | tuiSetDisassemContent (CORE_ADDR pc) |
c906108c SS |
185 | { |
186 | TuiStatus ret = TUI_FAILURE; | |
aec2f747 SC |
187 | register int i; |
188 | register int offset = disassemWin->detail.sourceInfo.horizontalOffset; | |
189 | register int lineWidth, maxLines; | |
190 | CORE_ADDR cur_pc; | |
191 | TuiGenWinInfoPtr locator = locatorWinInfoPtr (); | |
192 | int tab_len = tuiDefaultTabLen (); | |
193 | struct tui_asm_line* lines; | |
194 | int insn_pos; | |
195 | int addr_size, max_size; | |
196 | char* line; | |
197 | ||
198 | if (pc == 0) | |
199 | return TUI_FAILURE; | |
200 | ||
201 | ret = tuiAllocSourceBuffer (disassemWin); | |
202 | if (ret != TUI_SUCCESS) | |
203 | return ret; | |
204 | ||
205 | disassemWin->detail.sourceInfo.startLineOrAddr.addr = pc; | |
206 | cur_pc = (CORE_ADDR) | |
207 | (((TuiWinElementPtr) locator->content[0])->whichElement.locator.addr); | |
208 | ||
209 | maxLines = disassemWin->generic.height - 2; /* account for hilite */ | |
210 | ||
211 | /* Get temporary table that will hold all strings (addr & insn). */ | |
212 | lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) | |
213 | * maxLines); | |
214 | memset (lines, 0, sizeof (struct tui_asm_line) * maxLines); | |
215 | ||
216 | lineWidth = disassemWin->generic.width - 1; | |
217 | ||
218 | tui_disassemble (lines, pc, maxLines); | |
219 | ||
220 | /* See what is the maximum length of an address and of a line. */ | |
221 | addr_size = 0; | |
222 | max_size = 0; | |
223 | for (i = 0; i < maxLines; i++) | |
c906108c | 224 | { |
aec2f747 SC |
225 | size_t len = strlen (lines[i].addr_string); |
226 | if (len > addr_size) | |
227 | addr_size = len; | |
c906108c | 228 | |
aec2f747 SC |
229 | len = strlen (lines[i].insn) + tab_len; |
230 | if (len > max_size) | |
231 | max_size = len; | |
c906108c | 232 | } |
aec2f747 SC |
233 | max_size += addr_size + tab_len; |
234 | ||
235 | /* Allocate memory to create each line. */ | |
236 | line = (char*) alloca (max_size); | |
237 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; | |
238 | ||
239 | /* Now construct each line */ | |
240 | for (i = 0; i < maxLines; i++) | |
241 | { | |
242 | TuiWinElementPtr element; | |
243 | TuiSourceElement* src; | |
244 | int curLen; | |
245 | ||
246 | element = (TuiWinElementPtr) disassemWin->generic.content[i]; | |
247 | src = &element->whichElement.source; | |
248 | strcpy (line, lines[i].addr_string); | |
249 | curLen = strlen (line); | |
250 | ||
251 | /* Add spaces to make the instructions start on the same column */ | |
252 | while (curLen < insn_pos) | |
253 | { | |
254 | strcat (line, " "); | |
255 | curLen++; | |
256 | } | |
257 | ||
258 | strcat (line, lines[i].insn); | |
259 | ||
260 | /* Now copy the line taking the offset into account */ | |
261 | if (strlen (line) > offset) | |
262 | strcpy (src->line, &line[offset]); | |
263 | else | |
264 | src->line[0] = '\0'; | |
265 | ||
266 | src->lineOrAddr.addr = lines[i].addr; | |
267 | src->isExecPoint = lines[i].addr == cur_pc; | |
268 | ||
269 | /* See whether there is a breakpoint installed. */ | |
270 | src->hasBreak = (!src->isExecPoint | |
271 | && breakpoint_here_p (pc) != no_breakpoint_here); | |
c906108c | 272 | |
aec2f747 SC |
273 | xfree (lines[i].addr_string); |
274 | xfree (lines[i].insn); | |
275 | } | |
276 | disassemWin->generic.contentSize = i; | |
277 | return TUI_SUCCESS; | |
278 | } | |
c906108c SS |
279 | |
280 | ||
281 | /* | |
c5aa993b JM |
282 | ** tuiShowDisassem(). |
283 | ** Function to display the disassembly window with disassembled code. | |
284 | */ | |
c906108c | 285 | void |
c774cec6 | 286 | tuiShowDisassem (CORE_ADDR startAddr) |
c906108c | 287 | { |
c774cec6 | 288 | struct symtab *s = find_pc_symtab (startAddr); |
c906108c | 289 | TuiWinInfoPtr winWithFocus = tuiWinWithFocus (); |
a4b99e53 | 290 | TuiLineOrAddress val; |
c906108c | 291 | |
a4b99e53 | 292 | val.addr = startAddr; |
c906108c | 293 | tuiAddWinToLayout (DISASSEM_WIN); |
a4b99e53 | 294 | tuiUpdateSourceWindow (disassemWin, s, val, FALSE); |
c906108c | 295 | /* |
c5aa993b JM |
296 | ** if the focus was in the src win, put it in the asm win, if the |
297 | ** source view isn't split | |
298 | */ | |
c906108c SS |
299 | if (currentLayout () != SRC_DISASSEM_COMMAND && winWithFocus == srcWin) |
300 | tuiSetWinFocusTo (disassemWin); | |
301 | ||
302 | return; | |
303 | } /* tuiShowDisassem */ | |
304 | ||
305 | ||
306 | /* | |
c5aa993b JM |
307 | ** tuiShowDisassemAndUpdateSource(). |
308 | ** Function to display the disassembly window. | |
309 | */ | |
c906108c | 310 | void |
c774cec6 | 311 | tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr) |
c906108c SS |
312 | { |
313 | struct symtab_and_line sal; | |
314 | ||
315 | tuiShowDisassem (startAddr); | |
316 | if (currentLayout () == SRC_DISASSEM_COMMAND) | |
317 | { | |
a4b99e53 | 318 | TuiLineOrAddress val; |
aec2f747 | 319 | |
c906108c | 320 | /* |
c5aa993b JM |
321 | ** Update what is in the source window if it is displayed too, |
322 | ** note that it follows what is in the disassembly window and visa-versa | |
323 | */ | |
c774cec6 | 324 | sal = find_pc_line (startAddr, 0); |
a4b99e53 SC |
325 | val.lineNo = sal.line; |
326 | tuiUpdateSourceWindow (srcWin, sal.symtab, val, TRUE); | |
3024f13a SC |
327 | if (sal.symtab) |
328 | { | |
52575520 | 329 | set_current_source_symtab_and_line (&sal); |
3024f13a SC |
330 | tuiUpdateLocatorFilename (sal.symtab->filename); |
331 | } | |
332 | else | |
333 | tuiUpdateLocatorFilename ("?"); | |
c906108c SS |
334 | } |
335 | ||
336 | return; | |
337 | } /* tuiShowDisassemAndUpdateSource */ | |
338 | ||
c906108c | 339 | /* |
c5aa993b JM |
340 | ** tuiGetBeginAsmAddress(). |
341 | */ | |
c774cec6 | 342 | CORE_ADDR |
c906108c | 343 | tuiGetBeginAsmAddress (void) |
c906108c SS |
344 | { |
345 | TuiGenWinInfoPtr locator; | |
346 | TuiLocatorElementPtr element; | |
c774cec6 | 347 | CORE_ADDR addr; |
c906108c SS |
348 | |
349 | locator = locatorWinInfoPtr (); | |
350 | element = &((TuiWinElementPtr) locator->content[0])->whichElement.locator; | |
351 | ||
c774cec6 | 352 | if (element->addr == 0) |
c906108c | 353 | { |
0510ab86 SC |
354 | struct minimal_symbol *main_symbol; |
355 | ||
356 | /* Find address of the start of program. | |
357 | Note: this should be language specific. */ | |
358 | main_symbol = lookup_minimal_symbol ("main", NULL, NULL); | |
359 | if (main_symbol == 0) | |
360 | main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); | |
361 | if (main_symbol == 0) | |
362 | main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); | |
363 | if (main_symbol) | |
364 | addr = SYMBOL_VALUE_ADDRESS (main_symbol); | |
365 | else | |
366 | addr = 0; | |
c906108c SS |
367 | } |
368 | else /* the target is executing */ | |
369 | addr = element->addr; | |
370 | ||
371 | return addr; | |
aec2f747 | 372 | } /* tuiGetBeginAsmAddress */ |
c906108c | 373 | |
77cad3ba SC |
374 | /* Determine what the low address will be to display in the TUI's |
375 | disassembly window. This may or may not be the same as the | |
376 | low address input. */ | |
377 | CORE_ADDR | |
378 | tuiGetLowDisassemblyAddress (CORE_ADDR low, CORE_ADDR pc) | |
379 | { | |
380 | int pos; | |
381 | ||
382 | /* Determine where to start the disassembly so that the pc is about in the | |
383 | middle of the viewport. */ | |
384 | pos = tuiDefaultWinViewportHeight (DISASSEM_WIN, DISASSEM_COMMAND) / 2; | |
385 | pc = tui_find_disassembly_address (pc, -pos); | |
386 | ||
387 | if (pc < low) | |
388 | pc = low; | |
389 | return pc; | |
390 | } | |
391 | ||
c906108c | 392 | /* |
c5aa993b JM |
393 | ** tuiVerticalDisassemScroll(). |
394 | ** Scroll the disassembly forward or backward vertically | |
395 | */ | |
c906108c | 396 | void |
eca6576c SC |
397 | tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection, |
398 | int numToScroll) | |
c906108c SS |
399 | { |
400 | if (disassemWin->generic.content != (OpaquePtr) NULL) | |
401 | { | |
aec2f747 | 402 | CORE_ADDR pc; |
c906108c SS |
403 | TuiWinContent content; |
404 | struct symtab *s; | |
aec2f747 SC |
405 | TuiLineOrAddress val; |
406 | int maxLines, dir; | |
52575520 | 407 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c SS |
408 | |
409 | content = (TuiWinContent) disassemWin->generic.content; | |
52575520 | 410 | if (cursal.symtab == (struct symtab *) NULL) |
6e7f8b9c | 411 | s = find_pc_symtab (deprecated_selected_frame->pc); |
c906108c | 412 | else |
52575520 | 413 | s = cursal.symtab; |
c906108c | 414 | |
aec2f747 SC |
415 | /* account for hilite */ |
416 | maxLines = disassemWin->generic.height - 2; | |
c906108c | 417 | pc = content[0]->whichElement.source.lineOrAddr.addr; |
aec2f747 | 418 | dir = (scrollDirection == FORWARD_SCROLL) ? maxLines : - maxLines; |
c906108c | 419 | |
aec2f747 SC |
420 | val.addr = tui_find_disassembly_address (pc, dir); |
421 | tuiUpdateSourceWindowAsIs (disassemWin, s, val, FALSE); | |
422 | } | |
423 | } |