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" |
f70a7d61 | 48 | #include "disasm.h" |
c906108c SS |
49 | |
50 | #include "tui.h" | |
51 | #include "tuiData.h" | |
a8080b7f | 52 | #include "tuiWin.h" |
c906108c SS |
53 | #include "tuiLayout.h" |
54 | #include "tuiSourceWin.h" | |
55 | #include "tuiStack.h" | |
a8080b7f | 56 | #include "tui-file.h" |
c906108c | 57 | |
aec2f747 SC |
58 | struct tui_asm_line |
59 | { | |
60 | CORE_ADDR addr; | |
61 | char* addr_string; | |
62 | char* insn; | |
63 | }; | |
64 | ||
65 | /* Function to set the disassembly window's content. | |
66 | Disassemble count lines starting at pc. | |
67 | Return address of the count'th instruction after pc. */ | |
68 | static CORE_ADDR | |
69 | tui_disassemble (struct tui_asm_line* lines, CORE_ADDR pc, int count) | |
70 | { | |
71 | struct ui_file *gdb_dis_out; | |
c906108c | 72 | |
aec2f747 SC |
73 | /* now init the ui_file structure */ |
74 | gdb_dis_out = tui_sfileopen (256); | |
75 | ||
aec2f747 SC |
76 | /* Now construct each line */ |
77 | for (; count > 0; count--, lines++) | |
78 | { | |
79 | if (lines->addr_string) | |
80 | xfree (lines->addr_string); | |
81 | if (lines->insn) | |
82 | xfree (lines->insn); | |
83 | ||
84 | print_address (pc, gdb_dis_out); | |
85 | lines->addr = pc; | |
86 | lines->addr_string = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
87 | ||
88 | ui_file_rewind (gdb_dis_out); | |
89 | ||
92bf2b80 | 90 | pc = pc + gdb_print_insn (pc, gdb_dis_out); |
aec2f747 SC |
91 | |
92 | lines->insn = xstrdup (tui_file_get_strbuf (gdb_dis_out)); | |
93 | ||
94 | /* reset the buffer to empty */ | |
95 | ui_file_rewind (gdb_dis_out); | |
96 | } | |
97 | ui_file_delete (gdb_dis_out); | |
98 | return pc; | |
99 | } | |
100 | ||
101 | /* Find the disassembly address that corresponds to FROM lines | |
102 | above or below the PC. Variable sized instructions are taken | |
103 | into account by the algorithm. */ | |
104 | static CORE_ADDR | |
105 | tui_find_disassembly_address (CORE_ADDR pc, int from) | |
106 | { | |
107 | register CORE_ADDR newLow; | |
108 | int maxLines; | |
109 | int i; | |
110 | struct tui_asm_line* lines; | |
111 | ||
112 | maxLines = (from > 0) ? from : - from; | |
113 | if (maxLines <= 1) | |
114 | return pc; | |
115 | ||
116 | lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) | |
117 | * maxLines); | |
118 | memset (lines, 0, sizeof (struct tui_asm_line) * maxLines); | |
119 | ||
120 | newLow = pc; | |
121 | if (from > 0) | |
122 | { | |
123 | tui_disassemble (lines, pc, maxLines); | |
124 | newLow = lines[maxLines - 1].addr; | |
125 | } | |
126 | else | |
127 | { | |
128 | CORE_ADDR last_addr; | |
129 | int pos; | |
130 | struct minimal_symbol* msymbol; | |
131 | ||
132 | /* Find backward an address which is a symbol | |
133 | and for which disassembling from that address will fill | |
134 | completely the window. */ | |
135 | pos = maxLines - 1; | |
136 | do { | |
137 | newLow -= 1 * maxLines; | |
138 | msymbol = lookup_minimal_symbol_by_pc_section (newLow, 0); | |
139 | ||
140 | if (msymbol) | |
141 | newLow = SYMBOL_VALUE_ADDRESS (msymbol); | |
142 | else | |
143 | newLow += 1 * maxLines; | |
144 | ||
145 | tui_disassemble (lines, newLow, maxLines); | |
146 | last_addr = lines[pos].addr; | |
147 | } while (last_addr > pc && msymbol); | |
148 | ||
149 | /* Scan forward disassembling one instruction at a time | |
150 | until the last visible instruction of the window | |
151 | matches the pc. We keep the disassembled instructions | |
152 | in the 'lines' window and shift it downward (increasing | |
153 | its addresses). */ | |
154 | if (last_addr < pc) | |
155 | do | |
156 | { | |
157 | CORE_ADDR next_addr; | |
158 | ||
159 | pos++; | |
160 | if (pos >= maxLines) | |
161 | pos = 0; | |
162 | ||
163 | next_addr = tui_disassemble (&lines[pos], last_addr, 1); | |
164 | ||
165 | /* If there are some problems while disassembling exit. */ | |
166 | if (next_addr <= last_addr) | |
167 | break; | |
168 | last_addr = next_addr; | |
169 | } while (last_addr <= pc); | |
170 | pos++; | |
171 | if (pos >= maxLines) | |
172 | pos = 0; | |
173 | newLow = lines[pos].addr; | |
174 | } | |
175 | for (i = 0; i < maxLines; i++) | |
176 | { | |
177 | xfree (lines[i].addr_string); | |
178 | xfree (lines[i].insn); | |
179 | } | |
180 | return newLow; | |
181 | } | |
182 | ||
183 | /* Function to set the disassembly window's content. */ | |
c906108c | 184 | TuiStatus |
aec2f747 | 185 | tuiSetDisassemContent (CORE_ADDR pc) |
c906108c SS |
186 | { |
187 | TuiStatus ret = TUI_FAILURE; | |
aec2f747 SC |
188 | register int i; |
189 | register int offset = disassemWin->detail.sourceInfo.horizontalOffset; | |
190 | register int lineWidth, maxLines; | |
191 | CORE_ADDR cur_pc; | |
192 | TuiGenWinInfoPtr locator = locatorWinInfoPtr (); | |
193 | int tab_len = tuiDefaultTabLen (); | |
194 | struct tui_asm_line* lines; | |
195 | int insn_pos; | |
196 | int addr_size, max_size; | |
197 | char* line; | |
198 | ||
199 | if (pc == 0) | |
200 | return TUI_FAILURE; | |
201 | ||
202 | ret = tuiAllocSourceBuffer (disassemWin); | |
203 | if (ret != TUI_SUCCESS) | |
204 | return ret; | |
205 | ||
206 | disassemWin->detail.sourceInfo.startLineOrAddr.addr = pc; | |
207 | cur_pc = (CORE_ADDR) | |
208 | (((TuiWinElementPtr) locator->content[0])->whichElement.locator.addr); | |
209 | ||
210 | maxLines = disassemWin->generic.height - 2; /* account for hilite */ | |
211 | ||
212 | /* Get temporary table that will hold all strings (addr & insn). */ | |
213 | lines = (struct tui_asm_line*) alloca (sizeof (struct tui_asm_line) | |
214 | * maxLines); | |
215 | memset (lines, 0, sizeof (struct tui_asm_line) * maxLines); | |
216 | ||
217 | lineWidth = disassemWin->generic.width - 1; | |
218 | ||
219 | tui_disassemble (lines, pc, maxLines); | |
220 | ||
221 | /* See what is the maximum length of an address and of a line. */ | |
222 | addr_size = 0; | |
223 | max_size = 0; | |
224 | for (i = 0; i < maxLines; i++) | |
c906108c | 225 | { |
aec2f747 SC |
226 | size_t len = strlen (lines[i].addr_string); |
227 | if (len > addr_size) | |
228 | addr_size = len; | |
c906108c | 229 | |
aec2f747 SC |
230 | len = strlen (lines[i].insn) + tab_len; |
231 | if (len > max_size) | |
232 | max_size = len; | |
c906108c | 233 | } |
aec2f747 SC |
234 | max_size += addr_size + tab_len; |
235 | ||
236 | /* Allocate memory to create each line. */ | |
237 | line = (char*) alloca (max_size); | |
238 | insn_pos = (1 + (addr_size / tab_len)) * tab_len; | |
239 | ||
240 | /* Now construct each line */ | |
241 | for (i = 0; i < maxLines; i++) | |
242 | { | |
243 | TuiWinElementPtr element; | |
244 | TuiSourceElement* src; | |
245 | int curLen; | |
246 | ||
247 | element = (TuiWinElementPtr) disassemWin->generic.content[i]; | |
248 | src = &element->whichElement.source; | |
249 | strcpy (line, lines[i].addr_string); | |
250 | curLen = strlen (line); | |
251 | ||
252 | /* Add spaces to make the instructions start on the same column */ | |
253 | while (curLen < insn_pos) | |
254 | { | |
255 | strcat (line, " "); | |
256 | curLen++; | |
257 | } | |
258 | ||
259 | strcat (line, lines[i].insn); | |
260 | ||
261 | /* Now copy the line taking the offset into account */ | |
262 | if (strlen (line) > offset) | |
263 | strcpy (src->line, &line[offset]); | |
264 | else | |
265 | src->line[0] = '\0'; | |
266 | ||
267 | src->lineOrAddr.addr = lines[i].addr; | |
268 | src->isExecPoint = lines[i].addr == cur_pc; | |
269 | ||
270 | /* See whether there is a breakpoint installed. */ | |
271 | src->hasBreak = (!src->isExecPoint | |
272 | && breakpoint_here_p (pc) != no_breakpoint_here); | |
c906108c | 273 | |
aec2f747 SC |
274 | xfree (lines[i].addr_string); |
275 | xfree (lines[i].insn); | |
276 | } | |
277 | disassemWin->generic.contentSize = i; | |
278 | return TUI_SUCCESS; | |
279 | } | |
c906108c SS |
280 | |
281 | ||
282 | /* | |
c5aa993b JM |
283 | ** tuiShowDisassem(). |
284 | ** Function to display the disassembly window with disassembled code. | |
285 | */ | |
c906108c | 286 | void |
c774cec6 | 287 | tuiShowDisassem (CORE_ADDR startAddr) |
c906108c | 288 | { |
c774cec6 | 289 | struct symtab *s = find_pc_symtab (startAddr); |
c906108c | 290 | TuiWinInfoPtr winWithFocus = tuiWinWithFocus (); |
a4b99e53 | 291 | TuiLineOrAddress val; |
c906108c | 292 | |
a4b99e53 | 293 | val.addr = startAddr; |
c906108c | 294 | tuiAddWinToLayout (DISASSEM_WIN); |
a4b99e53 | 295 | tuiUpdateSourceWindow (disassemWin, s, val, FALSE); |
c906108c | 296 | /* |
c5aa993b JM |
297 | ** if the focus was in the src win, put it in the asm win, if the |
298 | ** source view isn't split | |
299 | */ | |
c906108c SS |
300 | if (currentLayout () != SRC_DISASSEM_COMMAND && winWithFocus == srcWin) |
301 | tuiSetWinFocusTo (disassemWin); | |
302 | ||
303 | return; | |
304 | } /* tuiShowDisassem */ | |
305 | ||
306 | ||
307 | /* | |
c5aa993b JM |
308 | ** tuiShowDisassemAndUpdateSource(). |
309 | ** Function to display the disassembly window. | |
310 | */ | |
c906108c | 311 | void |
c774cec6 | 312 | tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr) |
c906108c SS |
313 | { |
314 | struct symtab_and_line sal; | |
315 | ||
316 | tuiShowDisassem (startAddr); | |
317 | if (currentLayout () == SRC_DISASSEM_COMMAND) | |
318 | { | |
a4b99e53 | 319 | TuiLineOrAddress val; |
aec2f747 | 320 | |
c906108c | 321 | /* |
c5aa993b JM |
322 | ** Update what is in the source window if it is displayed too, |
323 | ** note that it follows what is in the disassembly window and visa-versa | |
324 | */ | |
c774cec6 | 325 | sal = find_pc_line (startAddr, 0); |
a4b99e53 SC |
326 | val.lineNo = sal.line; |
327 | tuiUpdateSourceWindow (srcWin, sal.symtab, val, TRUE); | |
3024f13a SC |
328 | if (sal.symtab) |
329 | { | |
52575520 | 330 | set_current_source_symtab_and_line (&sal); |
3024f13a SC |
331 | tuiUpdateLocatorFilename (sal.symtab->filename); |
332 | } | |
333 | else | |
334 | tuiUpdateLocatorFilename ("?"); | |
c906108c SS |
335 | } |
336 | ||
337 | return; | |
338 | } /* tuiShowDisassemAndUpdateSource */ | |
339 | ||
c906108c | 340 | /* |
c5aa993b JM |
341 | ** tuiGetBeginAsmAddress(). |
342 | */ | |
c774cec6 | 343 | CORE_ADDR |
c906108c | 344 | tuiGetBeginAsmAddress (void) |
c906108c SS |
345 | { |
346 | TuiGenWinInfoPtr locator; | |
347 | TuiLocatorElementPtr element; | |
c774cec6 | 348 | CORE_ADDR addr; |
c906108c SS |
349 | |
350 | locator = locatorWinInfoPtr (); | |
351 | element = &((TuiWinElementPtr) locator->content[0])->whichElement.locator; | |
352 | ||
c774cec6 | 353 | if (element->addr == 0) |
c906108c | 354 | { |
0510ab86 SC |
355 | struct minimal_symbol *main_symbol; |
356 | ||
357 | /* Find address of the start of program. | |
358 | Note: this should be language specific. */ | |
359 | main_symbol = lookup_minimal_symbol ("main", NULL, NULL); | |
360 | if (main_symbol == 0) | |
361 | main_symbol = lookup_minimal_symbol ("MAIN", NULL, NULL); | |
362 | if (main_symbol == 0) | |
363 | main_symbol = lookup_minimal_symbol ("_start", NULL, NULL); | |
364 | if (main_symbol) | |
365 | addr = SYMBOL_VALUE_ADDRESS (main_symbol); | |
366 | else | |
367 | addr = 0; | |
c906108c SS |
368 | } |
369 | else /* the target is executing */ | |
370 | addr = element->addr; | |
371 | ||
372 | return addr; | |
aec2f747 | 373 | } /* tuiGetBeginAsmAddress */ |
c906108c | 374 | |
77cad3ba SC |
375 | /* Determine what the low address will be to display in the TUI's |
376 | disassembly window. This may or may not be the same as the | |
377 | low address input. */ | |
378 | CORE_ADDR | |
379 | tuiGetLowDisassemblyAddress (CORE_ADDR low, CORE_ADDR pc) | |
380 | { | |
381 | int pos; | |
382 | ||
383 | /* Determine where to start the disassembly so that the pc is about in the | |
384 | middle of the viewport. */ | |
385 | pos = tuiDefaultWinViewportHeight (DISASSEM_WIN, DISASSEM_COMMAND) / 2; | |
386 | pc = tui_find_disassembly_address (pc, -pos); | |
387 | ||
388 | if (pc < low) | |
389 | pc = low; | |
390 | return pc; | |
391 | } | |
392 | ||
c906108c | 393 | /* |
c5aa993b JM |
394 | ** tuiVerticalDisassemScroll(). |
395 | ** Scroll the disassembly forward or backward vertically | |
396 | */ | |
c906108c | 397 | void |
eca6576c SC |
398 | tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection, |
399 | int numToScroll) | |
c906108c SS |
400 | { |
401 | if (disassemWin->generic.content != (OpaquePtr) NULL) | |
402 | { | |
aec2f747 | 403 | CORE_ADDR pc; |
c906108c SS |
404 | TuiWinContent content; |
405 | struct symtab *s; | |
aec2f747 SC |
406 | TuiLineOrAddress val; |
407 | int maxLines, dir; | |
52575520 | 408 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
c906108c SS |
409 | |
410 | content = (TuiWinContent) disassemWin->generic.content; | |
52575520 | 411 | if (cursal.symtab == (struct symtab *) NULL) |
f70a7d61 | 412 | s = find_pc_symtab (get_frame_pc (deprecated_selected_frame)); |
c906108c | 413 | else |
52575520 | 414 | s = cursal.symtab; |
c906108c | 415 | |
aec2f747 SC |
416 | /* account for hilite */ |
417 | maxLines = disassemWin->generic.height - 2; | |
c906108c | 418 | pc = content[0]->whichElement.source.lineOrAddr.addr; |
aec2f747 | 419 | dir = (scrollDirection == FORWARD_SCROLL) ? maxLines : - maxLines; |
c906108c | 420 | |
aec2f747 SC |
421 | val.addr = tui_find_disassembly_address (pc, dir); |
422 | tuiUpdateSourceWindowAsIs (disassemWin, s, val, FALSE); | |
423 | } | |
424 | } |