| 1 | /* Disassembly display. |
| 2 | |
| 3 | Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation, |
| 4 | Inc. |
| 5 | |
| 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. */ |
| 24 | |
| 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 | |
| 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 | |
| 42 | #include "defs.h" |
| 43 | #include "symtab.h" |
| 44 | #include "breakpoint.h" |
| 45 | #include "frame.h" |
| 46 | #include "value.h" |
| 47 | #include "source.h" |
| 48 | #include "disasm.h" |
| 49 | |
| 50 | #include "tui.h" |
| 51 | #include "tuiData.h" |
| 52 | #include "tuiWin.h" |
| 53 | #include "tuiLayout.h" |
| 54 | #include "tuiSourceWin.h" |
| 55 | #include "tuiStack.h" |
| 56 | #include "tui-file.h" |
| 57 | |
| 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; |
| 72 | |
| 73 | /* now init the ui_file structure */ |
| 74 | gdb_dis_out = tui_sfileopen (256); |
| 75 | |
| 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 | |
| 90 | pc = pc + gdb_print_insn (pc, gdb_dis_out); |
| 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. */ |
| 184 | TuiStatus |
| 185 | tuiSetDisassemContent (CORE_ADDR pc) |
| 186 | { |
| 187 | TuiStatus ret = TUI_FAILURE; |
| 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++) |
| 225 | { |
| 226 | size_t len = strlen (lines[i].addr_string); |
| 227 | if (len > addr_size) |
| 228 | addr_size = len; |
| 229 | |
| 230 | len = strlen (lines[i].insn) + tab_len; |
| 231 | if (len > max_size) |
| 232 | max_size = len; |
| 233 | } |
| 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); |
| 273 | |
| 274 | xfree (lines[i].addr_string); |
| 275 | xfree (lines[i].insn); |
| 276 | } |
| 277 | disassemWin->generic.contentSize = i; |
| 278 | return TUI_SUCCESS; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | /* |
| 283 | ** tuiShowDisassem(). |
| 284 | ** Function to display the disassembly window with disassembled code. |
| 285 | */ |
| 286 | void |
| 287 | tuiShowDisassem (CORE_ADDR startAddr) |
| 288 | { |
| 289 | struct symtab *s = find_pc_symtab (startAddr); |
| 290 | TuiWinInfoPtr winWithFocus = tuiWinWithFocus (); |
| 291 | TuiLineOrAddress val; |
| 292 | |
| 293 | val.addr = startAddr; |
| 294 | tuiAddWinToLayout (DISASSEM_WIN); |
| 295 | tuiUpdateSourceWindow (disassemWin, s, val, FALSE); |
| 296 | /* |
| 297 | ** if the focus was in the src win, put it in the asm win, if the |
| 298 | ** source view isn't split |
| 299 | */ |
| 300 | if (currentLayout () != SRC_DISASSEM_COMMAND && winWithFocus == srcWin) |
| 301 | tuiSetWinFocusTo (disassemWin); |
| 302 | |
| 303 | return; |
| 304 | } /* tuiShowDisassem */ |
| 305 | |
| 306 | |
| 307 | /* |
| 308 | ** tuiShowDisassemAndUpdateSource(). |
| 309 | ** Function to display the disassembly window. |
| 310 | */ |
| 311 | void |
| 312 | tuiShowDisassemAndUpdateSource (CORE_ADDR startAddr) |
| 313 | { |
| 314 | struct symtab_and_line sal; |
| 315 | |
| 316 | tuiShowDisassem (startAddr); |
| 317 | if (currentLayout () == SRC_DISASSEM_COMMAND) |
| 318 | { |
| 319 | TuiLineOrAddress val; |
| 320 | |
| 321 | /* |
| 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 | */ |
| 325 | sal = find_pc_line (startAddr, 0); |
| 326 | val.lineNo = sal.line; |
| 327 | tuiUpdateSourceWindow (srcWin, sal.symtab, val, TRUE); |
| 328 | if (sal.symtab) |
| 329 | { |
| 330 | set_current_source_symtab_and_line (&sal); |
| 331 | tuiUpdateLocatorFilename (sal.symtab->filename); |
| 332 | } |
| 333 | else |
| 334 | tuiUpdateLocatorFilename ("?"); |
| 335 | } |
| 336 | |
| 337 | return; |
| 338 | } /* tuiShowDisassemAndUpdateSource */ |
| 339 | |
| 340 | /* |
| 341 | ** tuiGetBeginAsmAddress(). |
| 342 | */ |
| 343 | CORE_ADDR |
| 344 | tuiGetBeginAsmAddress (void) |
| 345 | { |
| 346 | TuiGenWinInfoPtr locator; |
| 347 | TuiLocatorElementPtr element; |
| 348 | CORE_ADDR addr; |
| 349 | |
| 350 | locator = locatorWinInfoPtr (); |
| 351 | element = &((TuiWinElementPtr) locator->content[0])->whichElement.locator; |
| 352 | |
| 353 | if (element->addr == 0) |
| 354 | { |
| 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; |
| 368 | } |
| 369 | else /* the target is executing */ |
| 370 | addr = element->addr; |
| 371 | |
| 372 | return addr; |
| 373 | } /* tuiGetBeginAsmAddress */ |
| 374 | |
| 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 | |
| 393 | /* |
| 394 | ** tuiVerticalDisassemScroll(). |
| 395 | ** Scroll the disassembly forward or backward vertically |
| 396 | */ |
| 397 | void |
| 398 | tuiVerticalDisassemScroll (TuiScrollDirection scrollDirection, |
| 399 | int numToScroll) |
| 400 | { |
| 401 | if (disassemWin->generic.content != (OpaquePtr) NULL) |
| 402 | { |
| 403 | CORE_ADDR pc; |
| 404 | TuiWinContent content; |
| 405 | struct symtab *s; |
| 406 | TuiLineOrAddress val; |
| 407 | int maxLines, dir; |
| 408 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| 409 | |
| 410 | content = (TuiWinContent) disassemWin->generic.content; |
| 411 | if (cursal.symtab == (struct symtab *) NULL) |
| 412 | s = find_pc_symtab (get_frame_pc (deprecated_selected_frame)); |
| 413 | else |
| 414 | s = cursal.symtab; |
| 415 | |
| 416 | /* account for hilite */ |
| 417 | maxLines = disassemWin->generic.height - 2; |
| 418 | pc = content[0]->whichElement.source.lineOrAddr.addr; |
| 419 | dir = (scrollDirection == FORWARD_SCROLL) ? maxLines : - maxLines; |
| 420 | |
| 421 | val.addr = tui_find_disassembly_address (pc, dir); |
| 422 | tuiUpdateSourceWindowAsIs (disassemWin, s, val, FALSE); |
| 423 | } |
| 424 | } |