1 /* Disassembly display.
3 Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
6 Contributed by Hewlett-Packard Company.
8 This file is part of GDB.
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.
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.
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. */
27 #include "breakpoint.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"
56 /* Function to set the disassembly window's content.
57 Disassemble count lines starting at pc.
58 Return address of the count'th instruction after pc. */
60 tui_disassemble (struct tui_asm_line
* lines
, CORE_ADDR pc
, int count
)
62 struct ui_file
*gdb_dis_out
;
64 /* now init the ui_file structure */
65 gdb_dis_out
= tui_sfileopen (256);
67 /* Now construct each line */
68 for (; count
> 0; count
--, lines
++)
70 if (lines
->addr_string
)
71 xfree (lines
->addr_string
);
75 print_address (pc
, gdb_dis_out
);
77 lines
->addr_string
= xstrdup (tui_file_get_strbuf (gdb_dis_out
));
79 ui_file_rewind (gdb_dis_out
);
81 pc
= pc
+ gdb_print_insn (pc
, gdb_dis_out
);
83 lines
->insn
= xstrdup (tui_file_get_strbuf (gdb_dis_out
));
85 /* reset the buffer to empty */
86 ui_file_rewind (gdb_dis_out
);
88 ui_file_delete (gdb_dis_out
);
92 /* Find the disassembly address that corresponds to FROM lines
93 above or below the PC. Variable sized instructions are taken
94 into account by the algorithm. */
96 tui_find_disassembly_address (CORE_ADDR pc
, int from
)
98 register CORE_ADDR newLow
;
101 struct tui_asm_line
* lines
;
103 maxLines
= (from
> 0) ? from
: - from
;
107 lines
= (struct tui_asm_line
*) alloca (sizeof (struct tui_asm_line
)
109 memset (lines
, 0, sizeof (struct tui_asm_line
) * maxLines
);
114 tui_disassemble (lines
, pc
, maxLines
);
115 newLow
= lines
[maxLines
- 1].addr
;
121 struct minimal_symbol
* msymbol
;
123 /* Find backward an address which is a symbol
124 and for which disassembling from that address will fill
125 completely the window. */
128 newLow
-= 1 * maxLines
;
129 msymbol
= lookup_minimal_symbol_by_pc_section (newLow
, 0);
132 newLow
= SYMBOL_VALUE_ADDRESS (msymbol
);
134 newLow
+= 1 * maxLines
;
136 tui_disassemble (lines
, newLow
, maxLines
);
137 last_addr
= lines
[pos
].addr
;
138 } while (last_addr
> pc
&& msymbol
);
140 /* Scan forward disassembling one instruction at a time
141 until the last visible instruction of the window
142 matches the pc. We keep the disassembled instructions
143 in the 'lines' window and shift it downward (increasing
154 next_addr
= tui_disassemble (&lines
[pos
], last_addr
, 1);
156 /* If there are some problems while disassembling exit. */
157 if (next_addr
<= last_addr
)
159 last_addr
= next_addr
;
160 } while (last_addr
<= pc
);
164 newLow
= lines
[pos
].addr
;
166 for (i
= 0; i
< maxLines
; i
++)
168 xfree (lines
[i
].addr_string
);
169 xfree (lines
[i
].insn
);
174 /* Function to set the disassembly window's content. */
176 tuiSetDisassemContent (CORE_ADDR pc
)
178 TuiStatus ret
= TUI_FAILURE
;
180 register int offset
= disassemWin
->detail
.sourceInfo
.horizontalOffset
;
181 register int lineWidth
, maxLines
;
183 TuiGenWinInfoPtr locator
= locatorWinInfoPtr ();
184 int tab_len
= tuiDefaultTabLen ();
185 struct tui_asm_line
* lines
;
187 int addr_size
, max_size
;
193 ret
= tuiAllocSourceBuffer (disassemWin
);
194 if (ret
!= TUI_SUCCESS
)
197 disassemWin
->detail
.sourceInfo
.startLineOrAddr
.addr
= pc
;
199 (((TuiWinElementPtr
) locator
->content
[0])->whichElement
.locator
.addr
);
201 maxLines
= disassemWin
->generic
.height
- 2; /* account for hilite */
203 /* Get temporary table that will hold all strings (addr & insn). */
204 lines
= (struct tui_asm_line
*) alloca (sizeof (struct tui_asm_line
)
206 memset (lines
, 0, sizeof (struct tui_asm_line
) * maxLines
);
208 lineWidth
= disassemWin
->generic
.width
- 1;
210 tui_disassemble (lines
, pc
, maxLines
);
212 /* See what is the maximum length of an address and of a line. */
215 for (i
= 0; i
< maxLines
; i
++)
217 size_t len
= strlen (lines
[i
].addr_string
);
221 len
= strlen (lines
[i
].insn
) + tab_len
;
225 max_size
+= addr_size
+ tab_len
;
227 /* Allocate memory to create each line. */
228 line
= (char*) alloca (max_size
);
229 insn_pos
= (1 + (addr_size
/ tab_len
)) * tab_len
;
231 /* Now construct each line */
232 for (i
= 0; i
< maxLines
; i
++)
234 TuiWinElementPtr element
;
235 TuiSourceElement
* src
;
238 element
= (TuiWinElementPtr
) disassemWin
->generic
.content
[i
];
239 src
= &element
->whichElement
.source
;
240 strcpy (line
, lines
[i
].addr_string
);
241 curLen
= strlen (line
);
243 /* Add spaces to make the instructions start on the same column */
244 while (curLen
< insn_pos
)
250 strcat (line
, lines
[i
].insn
);
252 /* Now copy the line taking the offset into account */
253 if (strlen (line
) > offset
)
254 strcpy (src
->line
, &line
[offset
]);
258 src
->lineOrAddr
.addr
= lines
[i
].addr
;
259 src
->isExecPoint
= lines
[i
].addr
== cur_pc
;
261 /* See whether there is a breakpoint installed. */
262 src
->hasBreak
= (!src
->isExecPoint
263 && breakpoint_here_p (pc
) != no_breakpoint_here
);
265 xfree (lines
[i
].addr_string
);
266 xfree (lines
[i
].insn
);
268 disassemWin
->generic
.contentSize
= i
;
274 ** tuiShowDisassem().
275 ** Function to display the disassembly window with disassembled code.
278 tuiShowDisassem (CORE_ADDR startAddr
)
280 struct symtab
*s
= find_pc_symtab (startAddr
);
281 TuiWinInfoPtr winWithFocus
= tuiWinWithFocus ();
282 TuiLineOrAddress val
;
284 val
.addr
= startAddr
;
285 tuiAddWinToLayout (DISASSEM_WIN
);
286 tuiUpdateSourceWindow (disassemWin
, s
, val
, FALSE
);
288 ** if the focus was in the src win, put it in the asm win, if the
289 ** source view isn't split
291 if (currentLayout () != SRC_DISASSEM_COMMAND
&& winWithFocus
== srcWin
)
292 tuiSetWinFocusTo (disassemWin
);
295 } /* tuiShowDisassem */
299 ** tuiShowDisassemAndUpdateSource().
300 ** Function to display the disassembly window.
303 tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr
)
305 struct symtab_and_line sal
;
307 tuiShowDisassem (startAddr
);
308 if (currentLayout () == SRC_DISASSEM_COMMAND
)
310 TuiLineOrAddress val
;
313 ** Update what is in the source window if it is displayed too,
314 ** note that it follows what is in the disassembly window and visa-versa
316 sal
= find_pc_line (startAddr
, 0);
317 val
.lineNo
= sal
.line
;
318 tuiUpdateSourceWindow (srcWin
, sal
.symtab
, val
, TRUE
);
321 set_current_source_symtab_and_line (&sal
);
322 tuiUpdateLocatorFilename (sal
.symtab
->filename
);
325 tuiUpdateLocatorFilename ("?");
329 } /* tuiShowDisassemAndUpdateSource */
332 ** tuiGetBeginAsmAddress().
335 tuiGetBeginAsmAddress (void)
337 TuiGenWinInfoPtr locator
;
338 TuiLocatorElementPtr element
;
341 locator
= locatorWinInfoPtr ();
342 element
= &((TuiWinElementPtr
) locator
->content
[0])->whichElement
.locator
;
344 if (element
->addr
== 0)
346 struct minimal_symbol
*main_symbol
;
348 /* Find address of the start of program.
349 Note: this should be language specific. */
350 main_symbol
= lookup_minimal_symbol ("main", NULL
, NULL
);
351 if (main_symbol
== 0)
352 main_symbol
= lookup_minimal_symbol ("MAIN", NULL
, NULL
);
353 if (main_symbol
== 0)
354 main_symbol
= lookup_minimal_symbol ("_start", NULL
, NULL
);
356 addr
= SYMBOL_VALUE_ADDRESS (main_symbol
);
360 else /* the target is executing */
361 addr
= element
->addr
;
364 } /* tuiGetBeginAsmAddress */
366 /* Determine what the low address will be to display in the TUI's
367 disassembly window. This may or may not be the same as the
368 low address input. */
370 tuiGetLowDisassemblyAddress (CORE_ADDR low
, CORE_ADDR pc
)
374 /* Determine where to start the disassembly so that the pc is about in the
375 middle of the viewport. */
376 pos
= tuiDefaultWinViewportHeight (DISASSEM_WIN
, DISASSEM_COMMAND
) / 2;
377 pc
= tui_find_disassembly_address (pc
, -pos
);
385 ** tuiVerticalDisassemScroll().
386 ** Scroll the disassembly forward or backward vertically
389 tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection
,
392 if (disassemWin
->generic
.content
!= (OpaquePtr
) NULL
)
395 TuiWinContent content
;
397 TuiLineOrAddress val
;
399 struct symtab_and_line cursal
= get_current_source_symtab_and_line ();
401 content
= (TuiWinContent
) disassemWin
->generic
.content
;
402 if (cursal
.symtab
== (struct symtab
*) NULL
)
403 s
= find_pc_symtab (get_frame_pc (deprecated_selected_frame
));
407 /* account for hilite */
408 maxLines
= disassemWin
->generic
.height
- 2;
409 pc
= content
[0]->whichElement
.source
.lineOrAddr
.addr
;
410 dir
= (scrollDirection
== FORWARD_SCROLL
) ? maxLines
: - maxLines
;
412 val
.addr
= tui_find_disassembly_address (pc
, dir
);
413 tuiUpdateSourceWindowAsIs (disassemWin
, s
, val
, FALSE
);