| 1 | /* Work with executable files, for GDB. |
| 2 | |
| 3 | Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
| 4 | 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008 |
| 5 | Free Software Foundation, Inc. |
| 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 |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 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 |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "frame.h" |
| 24 | #include "inferior.h" |
| 25 | #include "target.h" |
| 26 | #include "gdbcmd.h" |
| 27 | #include "language.h" |
| 28 | #include "symfile.h" |
| 29 | #include "objfiles.h" |
| 30 | #include "completer.h" |
| 31 | #include "value.h" |
| 32 | #include "exec.h" |
| 33 | #include "observer.h" |
| 34 | #include "arch-utils.h" |
| 35 | |
| 36 | #include <fcntl.h> |
| 37 | #include "readline/readline.h" |
| 38 | #include "gdb_string.h" |
| 39 | |
| 40 | #include "gdbcore.h" |
| 41 | |
| 42 | #include <ctype.h> |
| 43 | #include "gdb_stat.h" |
| 44 | |
| 45 | #include "xcoffsolib.h" |
| 46 | |
| 47 | struct vmap *map_vmap (bfd *, bfd *); |
| 48 | |
| 49 | void (*deprecated_file_changed_hook) (char *); |
| 50 | |
| 51 | /* Prototypes for local functions */ |
| 52 | |
| 53 | static void exec_close (int); |
| 54 | |
| 55 | static void file_command (char *, int); |
| 56 | |
| 57 | static void set_section_command (char *, int); |
| 58 | |
| 59 | static void exec_files_info (struct target_ops *); |
| 60 | |
| 61 | static void init_exec_ops (void); |
| 62 | |
| 63 | void _initialize_exec (void); |
| 64 | |
| 65 | /* The target vector for executable files. */ |
| 66 | |
| 67 | struct target_ops exec_ops; |
| 68 | |
| 69 | /* The Binary File Descriptor handle for the executable file. */ |
| 70 | |
| 71 | bfd *exec_bfd = NULL; |
| 72 | long exec_bfd_mtime = 0; |
| 73 | |
| 74 | /* Whether to open exec and core files read-only or read-write. */ |
| 75 | |
| 76 | int write_files = 0; |
| 77 | static void |
| 78 | show_write_files (struct ui_file *file, int from_tty, |
| 79 | struct cmd_list_element *c, const char *value) |
| 80 | { |
| 81 | fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), |
| 82 | value); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | struct vmap *vmap; |
| 87 | |
| 88 | static void |
| 89 | exec_open (char *args, int from_tty) |
| 90 | { |
| 91 | target_preopen (from_tty); |
| 92 | exec_file_attach (args, from_tty); |
| 93 | } |
| 94 | |
| 95 | static void |
| 96 | exec_close (int quitting) |
| 97 | { |
| 98 | int need_symtab_cleanup = 0; |
| 99 | struct vmap *vp, *nxt; |
| 100 | |
| 101 | for (nxt = vmap; nxt != NULL;) |
| 102 | { |
| 103 | vp = nxt; |
| 104 | nxt = vp->nxt; |
| 105 | |
| 106 | /* if there is an objfile associated with this bfd, |
| 107 | free_objfile() will do proper cleanup of objfile *and* bfd. */ |
| 108 | |
| 109 | if (vp->objfile) |
| 110 | { |
| 111 | free_objfile (vp->objfile); |
| 112 | need_symtab_cleanup = 1; |
| 113 | } |
| 114 | else if (vp->bfd != exec_bfd) |
| 115 | /* FIXME-leak: We should be freeing vp->name too, I think. */ |
| 116 | if (!bfd_close (vp->bfd)) |
| 117 | warning (_("cannot close \"%s\": %s"), |
| 118 | vp->name, bfd_errmsg (bfd_get_error ())); |
| 119 | |
| 120 | /* FIXME: This routine is #if 0'd in symfile.c. What should we |
| 121 | be doing here? Should we just free everything in |
| 122 | vp->objfile->symtabs? Should free_objfile do that? |
| 123 | FIXME-as-well: free_objfile already free'd vp->name, so it isn't |
| 124 | valid here. */ |
| 125 | free_named_symtabs (vp->name); |
| 126 | xfree (vp); |
| 127 | } |
| 128 | |
| 129 | vmap = NULL; |
| 130 | |
| 131 | if (exec_bfd) |
| 132 | { |
| 133 | char *name = bfd_get_filename (exec_bfd); |
| 134 | |
| 135 | if (!bfd_close (exec_bfd)) |
| 136 | warning (_("cannot close \"%s\": %s"), |
| 137 | name, bfd_errmsg (bfd_get_error ())); |
| 138 | xfree (name); |
| 139 | exec_bfd = NULL; |
| 140 | exec_bfd_mtime = 0; |
| 141 | } |
| 142 | |
| 143 | if (exec_ops.to_sections) |
| 144 | { |
| 145 | xfree (exec_ops.to_sections); |
| 146 | exec_ops.to_sections = NULL; |
| 147 | exec_ops.to_sections_end = NULL; |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | void |
| 152 | exec_file_clear (int from_tty) |
| 153 | { |
| 154 | /* Remove exec file. */ |
| 155 | unpush_target (&exec_ops); |
| 156 | |
| 157 | if (from_tty) |
| 158 | printf_unfiltered (_("No executable file now.\n")); |
| 159 | } |
| 160 | |
| 161 | /* Process the first arg in ARGS as the new exec file. |
| 162 | |
| 163 | This function is intended to be behave essentially the same |
| 164 | as exec_file_command, except that the latter will detect when |
| 165 | a target is being debugged, and will ask the user whether it |
| 166 | should be shut down first. (If the answer is "no", then the |
| 167 | new file is ignored.) |
| 168 | |
| 169 | This file is used by exec_file_command, to do the work of opening |
| 170 | and processing the exec file after any prompting has happened. |
| 171 | |
| 172 | And, it is used by child_attach, when the attach command was |
| 173 | given a pid but not a exec pathname, and the attach command could |
| 174 | figure out the pathname from the pid. (In this case, we shouldn't |
| 175 | ask the user whether the current target should be shut down -- |
| 176 | we're supplying the exec pathname late for good reason.) |
| 177 | |
| 178 | ARGS is assumed to be the filename. */ |
| 179 | |
| 180 | void |
| 181 | exec_file_attach (char *filename, int from_tty) |
| 182 | { |
| 183 | /* Remove any previous exec file. */ |
| 184 | unpush_target (&exec_ops); |
| 185 | |
| 186 | /* Now open and digest the file the user requested, if any. */ |
| 187 | |
| 188 | if (!filename) |
| 189 | { |
| 190 | if (from_tty) |
| 191 | printf_unfiltered (_("No executable file now.\n")); |
| 192 | |
| 193 | set_gdbarch_from_file (NULL); |
| 194 | } |
| 195 | else |
| 196 | { |
| 197 | char *scratch_pathname; |
| 198 | int scratch_chan; |
| 199 | |
| 200 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, |
| 201 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0, |
| 202 | &scratch_pathname); |
| 203 | #if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) |
| 204 | if (scratch_chan < 0) |
| 205 | { |
| 206 | char *exename = alloca (strlen (filename) + 5); |
| 207 | strcat (strcpy (exename, filename), ".exe"); |
| 208 | scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
| 209 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0, |
| 210 | &scratch_pathname); |
| 211 | } |
| 212 | #endif |
| 213 | if (scratch_chan < 0) |
| 214 | perror_with_name (filename); |
| 215 | exec_bfd = bfd_fopen (scratch_pathname, gnutarget, |
| 216 | write_files ? FOPEN_RUB : FOPEN_RB, |
| 217 | scratch_chan); |
| 218 | |
| 219 | if (!exec_bfd) |
| 220 | error (_("\"%s\": could not open as an executable file: %s"), |
| 221 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 222 | |
| 223 | /* At this point, scratch_pathname and exec_bfd->name both point to the |
| 224 | same malloc'd string. However exec_close() will attempt to free it |
| 225 | via the exec_bfd->name pointer, so we need to make another copy and |
| 226 | leave exec_bfd as the new owner of the original copy. */ |
| 227 | scratch_pathname = xstrdup (scratch_pathname); |
| 228 | make_cleanup (xfree, scratch_pathname); |
| 229 | |
| 230 | if (!bfd_check_format (exec_bfd, bfd_object)) |
| 231 | { |
| 232 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 233 | it. */ |
| 234 | exec_close (0); |
| 235 | error (_("\"%s\": not in executable format: %s"), |
| 236 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 237 | } |
| 238 | |
| 239 | /* FIXME - This should only be run for RS6000, but the ifdef is a poor |
| 240 | way to accomplish. */ |
| 241 | #ifdef DEPRECATED_IBM6000_TARGET |
| 242 | /* Setup initial vmap. */ |
| 243 | |
| 244 | map_vmap (exec_bfd, 0); |
| 245 | if (vmap == NULL) |
| 246 | { |
| 247 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 248 | it. */ |
| 249 | exec_close (0); |
| 250 | error (_("\"%s\": can't find the file sections: %s"), |
| 251 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 252 | } |
| 253 | #endif /* DEPRECATED_IBM6000_TARGET */ |
| 254 | |
| 255 | if (build_section_table (exec_bfd, &exec_ops.to_sections, |
| 256 | &exec_ops.to_sections_end)) |
| 257 | { |
| 258 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 259 | it. */ |
| 260 | exec_close (0); |
| 261 | error (_("\"%s\": can't find the file sections: %s"), |
| 262 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 263 | } |
| 264 | |
| 265 | exec_bfd_mtime = bfd_get_mtime (exec_bfd); |
| 266 | |
| 267 | validate_files (); |
| 268 | |
| 269 | set_gdbarch_from_file (exec_bfd); |
| 270 | |
| 271 | push_target (&exec_ops); |
| 272 | |
| 273 | /* Tell display code (if any) about the changed file name. */ |
| 274 | if (deprecated_exec_file_display_hook) |
| 275 | (*deprecated_exec_file_display_hook) (filename); |
| 276 | } |
| 277 | bfd_cache_close_all (); |
| 278 | observer_notify_executable_changed (); |
| 279 | } |
| 280 | |
| 281 | /* Process the first arg in ARGS as the new exec file. |
| 282 | |
| 283 | Note that we have to explicitly ignore additional args, since we can |
| 284 | be called from file_command(), which also calls symbol_file_command() |
| 285 | which can take multiple args. |
| 286 | |
| 287 | If ARGS is NULL, we just want to close the exec file. */ |
| 288 | |
| 289 | static void |
| 290 | exec_file_command (char *args, int from_tty) |
| 291 | { |
| 292 | char **argv; |
| 293 | char *filename; |
| 294 | |
| 295 | if (from_tty && target_has_execution |
| 296 | && !query (_("A program is being debugged already.\n" |
| 297 | "Are you sure you want to change the file? "))) |
| 298 | error (_("File not changed.")); |
| 299 | |
| 300 | if (args) |
| 301 | { |
| 302 | /* Scan through the args and pick up the first non option arg |
| 303 | as the filename. */ |
| 304 | |
| 305 | argv = buildargv (args); |
| 306 | if (argv == NULL) |
| 307 | nomem (0); |
| 308 | |
| 309 | make_cleanup_freeargv (argv); |
| 310 | |
| 311 | for (; (*argv != NULL) && (**argv == '-'); argv++) |
| 312 | {; |
| 313 | } |
| 314 | if (*argv == NULL) |
| 315 | error (_("No executable file name was specified")); |
| 316 | |
| 317 | filename = tilde_expand (*argv); |
| 318 | make_cleanup (xfree, filename); |
| 319 | exec_file_attach (filename, from_tty); |
| 320 | } |
| 321 | else |
| 322 | exec_file_attach (NULL, from_tty); |
| 323 | } |
| 324 | |
| 325 | /* Set both the exec file and the symbol file, in one command. |
| 326 | What a novelty. Why did GDB go through four major releases before this |
| 327 | command was added? */ |
| 328 | |
| 329 | static void |
| 330 | file_command (char *arg, int from_tty) |
| 331 | { |
| 332 | /* FIXME, if we lose on reading the symbol file, we should revert |
| 333 | the exec file, but that's rough. */ |
| 334 | exec_file_command (arg, from_tty); |
| 335 | symbol_file_command (arg, from_tty); |
| 336 | if (deprecated_file_changed_hook) |
| 337 | deprecated_file_changed_hook (arg); |
| 338 | } |
| 339 | \f |
| 340 | |
| 341 | /* Locate all mappable sections of a BFD file. |
| 342 | table_pp_char is a char * to get it through bfd_map_over_sections; |
| 343 | we cast it back to its proper type. */ |
| 344 | |
| 345 | static void |
| 346 | add_to_section_table (bfd *abfd, struct bfd_section *asect, |
| 347 | void *table_pp_char) |
| 348 | { |
| 349 | struct section_table **table_pp = (struct section_table **) table_pp_char; |
| 350 | flagword aflag; |
| 351 | |
| 352 | /* Check the section flags, but do not discard zero-length sections, since |
| 353 | some symbols may still be attached to this section. For instance, we |
| 354 | encountered on sparc-solaris 2.10 a shared library with an empty .bss |
| 355 | section to which a symbol named "_end" was attached. The address |
| 356 | of this symbol still needs to be relocated. */ |
| 357 | aflag = bfd_get_section_flags (abfd, asect); |
| 358 | if (!(aflag & SEC_ALLOC)) |
| 359 | return; |
| 360 | |
| 361 | (*table_pp)->bfd = abfd; |
| 362 | (*table_pp)->the_bfd_section = asect; |
| 363 | (*table_pp)->addr = bfd_section_vma (abfd, asect); |
| 364 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); |
| 365 | (*table_pp)++; |
| 366 | } |
| 367 | |
| 368 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
| 369 | Returns 0 if OK, 1 on error. */ |
| 370 | |
| 371 | int |
| 372 | build_section_table (struct bfd *some_bfd, struct section_table **start, |
| 373 | struct section_table **end) |
| 374 | { |
| 375 | unsigned count; |
| 376 | |
| 377 | count = bfd_count_sections (some_bfd); |
| 378 | if (*start) |
| 379 | xfree (* start); |
| 380 | *start = (struct section_table *) xmalloc (count * sizeof (**start)); |
| 381 | *end = *start; |
| 382 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
| 383 | if (*end > *start + count) |
| 384 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 385 | /* We could realloc the table, but it probably loses for most files. */ |
| 386 | return 0; |
| 387 | } |
| 388 | \f |
| 389 | static void |
| 390 | bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3) |
| 391 | { |
| 392 | struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3; |
| 393 | struct vmap *vp; |
| 394 | |
| 395 | vp = vmap_bfd->pvmap; |
| 396 | |
| 397 | if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0) |
| 398 | return; |
| 399 | |
| 400 | if (strcmp (bfd_section_name (abfd, sect), ".text") == 0) |
| 401 | { |
| 402 | vp->tstart = bfd_section_vma (abfd, sect); |
| 403 | vp->tend = vp->tstart + bfd_section_size (abfd, sect); |
| 404 | vp->tvma = bfd_section_vma (abfd, sect); |
| 405 | vp->toffs = sect->filepos; |
| 406 | } |
| 407 | else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0) |
| 408 | { |
| 409 | vp->dstart = bfd_section_vma (abfd, sect); |
| 410 | vp->dend = vp->dstart + bfd_section_size (abfd, sect); |
| 411 | vp->dvma = bfd_section_vma (abfd, sect); |
| 412 | } |
| 413 | /* Silently ignore other types of sections. (FIXME?) */ |
| 414 | } |
| 415 | |
| 416 | /* Make a vmap for ABFD which might be a member of the archive ARCH. |
| 417 | Return the new vmap. */ |
| 418 | |
| 419 | struct vmap * |
| 420 | map_vmap (bfd *abfd, bfd *arch) |
| 421 | { |
| 422 | struct vmap_and_bfd vmap_bfd; |
| 423 | struct vmap *vp, **vpp; |
| 424 | |
| 425 | vp = (struct vmap *) xmalloc (sizeof (*vp)); |
| 426 | memset ((char *) vp, '\0', sizeof (*vp)); |
| 427 | vp->nxt = 0; |
| 428 | vp->bfd = abfd; |
| 429 | vp->name = bfd_get_filename (arch ? arch : abfd); |
| 430 | vp->member = arch ? bfd_get_filename (abfd) : ""; |
| 431 | |
| 432 | vmap_bfd.pbfd = arch; |
| 433 | vmap_bfd.pvmap = vp; |
| 434 | bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd); |
| 435 | |
| 436 | /* Find the end of the list and append. */ |
| 437 | for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) |
| 438 | ; |
| 439 | *vpp = vp; |
| 440 | |
| 441 | return vp; |
| 442 | } |
| 443 | \f |
| 444 | /* Read or write the exec file. |
| 445 | |
| 446 | Args are address within a BFD file, address within gdb address-space, |
| 447 | length, and a flag indicating whether to read or write. |
| 448 | |
| 449 | Result is a length: |
| 450 | |
| 451 | 0: We cannot handle this address and length. |
| 452 | > 0: We have handled N bytes starting at this address. |
| 453 | (If N == length, we did it all.) We might be able |
| 454 | to handle more bytes beyond this length, but no |
| 455 | promises. |
| 456 | < 0: We cannot handle this address, but if somebody |
| 457 | else handles (-N) bytes, we can start from there. |
| 458 | |
| 459 | The same routine is used to handle both core and exec files; |
| 460 | we just tail-call it with more arguments to select between them. */ |
| 461 | |
| 462 | int |
| 463 | xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
| 464 | struct mem_attrib *attrib, struct target_ops *target) |
| 465 | { |
| 466 | int res; |
| 467 | struct section_table *p; |
| 468 | CORE_ADDR nextsectaddr, memend; |
| 469 | asection *section = NULL; |
| 470 | |
| 471 | if (len <= 0) |
| 472 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
| 473 | |
| 474 | if (overlay_debugging) |
| 475 | { |
| 476 | section = find_pc_overlay (memaddr); |
| 477 | if (pc_in_unmapped_range (memaddr, section)) |
| 478 | memaddr = overlay_mapped_address (memaddr, section); |
| 479 | } |
| 480 | |
| 481 | memend = memaddr + len; |
| 482 | nextsectaddr = memend; |
| 483 | |
| 484 | for (p = target->to_sections; p < target->to_sections_end; p++) |
| 485 | { |
| 486 | if (overlay_debugging && section && |
| 487 | strcmp (section->name, p->the_bfd_section->name) != 0) |
| 488 | continue; /* not the section we need */ |
| 489 | if (memaddr >= p->addr) |
| 490 | { |
| 491 | if (memend <= p->endaddr) |
| 492 | { |
| 493 | /* Entire transfer is within this section. */ |
| 494 | if (write) |
| 495 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
| 496 | myaddr, memaddr - p->addr, |
| 497 | len); |
| 498 | else |
| 499 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, |
| 500 | myaddr, memaddr - p->addr, |
| 501 | len); |
| 502 | return (res != 0) ? len : 0; |
| 503 | } |
| 504 | else if (memaddr >= p->endaddr) |
| 505 | { |
| 506 | /* This section ends before the transfer starts. */ |
| 507 | continue; |
| 508 | } |
| 509 | else |
| 510 | { |
| 511 | /* This section overlaps the transfer. Just do half. */ |
| 512 | len = p->endaddr - memaddr; |
| 513 | if (write) |
| 514 | res = bfd_set_section_contents (p->bfd, p->the_bfd_section, |
| 515 | myaddr, memaddr - p->addr, |
| 516 | len); |
| 517 | else |
| 518 | res = bfd_get_section_contents (p->bfd, p->the_bfd_section, |
| 519 | myaddr, memaddr - p->addr, |
| 520 | len); |
| 521 | return (res != 0) ? len : 0; |
| 522 | } |
| 523 | } |
| 524 | else |
| 525 | nextsectaddr = min (nextsectaddr, p->addr); |
| 526 | } |
| 527 | |
| 528 | if (nextsectaddr >= memend) |
| 529 | return 0; /* We can't help */ |
| 530 | else |
| 531 | return -(nextsectaddr - memaddr); /* Next boundary where we can help */ |
| 532 | } |
| 533 | \f |
| 534 | |
| 535 | void |
| 536 | print_section_info (struct target_ops *t, bfd *abfd) |
| 537 | { |
| 538 | struct section_table *p; |
| 539 | /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ |
| 540 | int wid = gdbarch_addr_bit (gdbarch_from_bfd (abfd)) <= 32 ? 8 : 16; |
| 541 | |
| 542 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
| 543 | wrap_here (" "); |
| 544 | printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); |
| 545 | if (abfd == exec_bfd) |
| 546 | printf_filtered (_("\tEntry point: %s\n"), |
| 547 | paddress (bfd_get_start_address (abfd))); |
| 548 | for (p = t->to_sections; p < t->to_sections_end; p++) |
| 549 | { |
| 550 | printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); |
| 551 | printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); |
| 552 | |
| 553 | /* FIXME: A format of "08l" is not wide enough for file offsets |
| 554 | larger than 4GB. OTOH, making it "016l" isn't desirable either |
| 555 | since most output will then be much wider than necessary. It |
| 556 | may make sense to test the size of the file and choose the |
| 557 | format string accordingly. */ |
| 558 | /* FIXME: i18n: Need to rewrite this sentence. */ |
| 559 | if (info_verbose) |
| 560 | printf_filtered (" @ %s", |
| 561 | hex_string_custom (p->the_bfd_section->filepos, 8)); |
| 562 | printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section)); |
| 563 | if (p->bfd != abfd) |
| 564 | printf_filtered (" in %s", bfd_get_filename (p->bfd)); |
| 565 | printf_filtered ("\n"); |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | static void |
| 570 | exec_files_info (struct target_ops *t) |
| 571 | { |
| 572 | print_section_info (t, exec_bfd); |
| 573 | |
| 574 | if (vmap) |
| 575 | { |
| 576 | struct vmap *vp; |
| 577 | |
| 578 | printf_unfiltered (_("\tMapping info for file `%s'.\n"), vmap->name); |
| 579 | printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n", |
| 580 | strlen_paddr (), "tstart", |
| 581 | strlen_paddr (), "tend", |
| 582 | strlen_paddr (), "dstart", |
| 583 | strlen_paddr (), "dend", |
| 584 | "section", |
| 585 | "file(member)"); |
| 586 | |
| 587 | for (vp = vmap; vp; vp = vp->nxt) |
| 588 | printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n", |
| 589 | paddr (vp->tstart), |
| 590 | paddr (vp->tend), |
| 591 | paddr (vp->dstart), |
| 592 | paddr (vp->dend), |
| 593 | vp->name, |
| 594 | *vp->member ? "(" : "", vp->member, |
| 595 | *vp->member ? ")" : ""); |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | static void |
| 600 | set_section_command (char *args, int from_tty) |
| 601 | { |
| 602 | struct section_table *p; |
| 603 | char *secname; |
| 604 | unsigned seclen; |
| 605 | unsigned long secaddr; |
| 606 | char secprint[100]; |
| 607 | long offset; |
| 608 | |
| 609 | if (args == 0) |
| 610 | error (_("Must specify section name and its virtual address")); |
| 611 | |
| 612 | /* Parse out section name */ |
| 613 | for (secname = args; !isspace (*args); args++); |
| 614 | seclen = args - secname; |
| 615 | |
| 616 | /* Parse out new virtual address */ |
| 617 | secaddr = parse_and_eval_address (args); |
| 618 | |
| 619 | for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) |
| 620 | { |
| 621 | if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen) |
| 622 | && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') |
| 623 | { |
| 624 | offset = secaddr - p->addr; |
| 625 | p->addr += offset; |
| 626 | p->endaddr += offset; |
| 627 | if (from_tty) |
| 628 | exec_files_info (&exec_ops); |
| 629 | return; |
| 630 | } |
| 631 | } |
| 632 | if (seclen >= sizeof (secprint)) |
| 633 | seclen = sizeof (secprint) - 1; |
| 634 | strncpy (secprint, secname, seclen); |
| 635 | secprint[seclen] = '\0'; |
| 636 | error (_("Section %s not found"), secprint); |
| 637 | } |
| 638 | |
| 639 | /* If we can find a section in FILENAME with BFD index INDEX, adjust |
| 640 | it to ADDRESS. */ |
| 641 | |
| 642 | void |
| 643 | exec_set_section_address (const char *filename, int index, CORE_ADDR address) |
| 644 | { |
| 645 | struct section_table *p; |
| 646 | |
| 647 | for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) |
| 648 | { |
| 649 | if (strcmp (filename, p->bfd->filename) == 0 |
| 650 | && index == p->the_bfd_section->index) |
| 651 | { |
| 652 | p->endaddr += address - p->addr; |
| 653 | p->addr = address; |
| 654 | } |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | /* If mourn is being called in all the right places, this could be say |
| 659 | `gdb internal error' (since generic_mourn calls |
| 660 | breakpoint_init_inferior). */ |
| 661 | |
| 662 | static int |
| 663 | ignore (struct bp_target_info *bp_tgt) |
| 664 | { |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | /* Find mapped memory. */ |
| 669 | |
| 670 | extern void |
| 671 | exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, |
| 672 | unsigned long, |
| 673 | int, int, int, |
| 674 | void *), |
| 675 | void *)) |
| 676 | { |
| 677 | exec_ops.to_find_memory_regions = func; |
| 678 | } |
| 679 | |
| 680 | static char *exec_make_note_section (bfd *, int *); |
| 681 | |
| 682 | /* Fill in the exec file target vector. Very few entries need to be |
| 683 | defined. */ |
| 684 | |
| 685 | static void |
| 686 | init_exec_ops (void) |
| 687 | { |
| 688 | exec_ops.to_shortname = "exec"; |
| 689 | exec_ops.to_longname = "Local exec file"; |
| 690 | exec_ops.to_doc = "Use an executable file as a target.\n\ |
| 691 | Specify the filename of the executable file."; |
| 692 | exec_ops.to_open = exec_open; |
| 693 | exec_ops.to_close = exec_close; |
| 694 | exec_ops.to_attach = find_default_attach; |
| 695 | exec_ops.deprecated_xfer_memory = xfer_memory; |
| 696 | exec_ops.to_files_info = exec_files_info; |
| 697 | exec_ops.to_insert_breakpoint = ignore; |
| 698 | exec_ops.to_remove_breakpoint = ignore; |
| 699 | exec_ops.to_create_inferior = find_default_create_inferior; |
| 700 | exec_ops.to_stratum = file_stratum; |
| 701 | exec_ops.to_has_memory = 1; |
| 702 | exec_ops.to_make_corefile_notes = exec_make_note_section; |
| 703 | exec_ops.to_magic = OPS_MAGIC; |
| 704 | } |
| 705 | |
| 706 | void |
| 707 | _initialize_exec (void) |
| 708 | { |
| 709 | struct cmd_list_element *c; |
| 710 | |
| 711 | init_exec_ops (); |
| 712 | |
| 713 | if (!dbx_commands) |
| 714 | { |
| 715 | c = add_cmd ("file", class_files, file_command, _("\ |
| 716 | Use FILE as program to be debugged.\n\ |
| 717 | It is read for its symbols, for getting the contents of pure memory,\n\ |
| 718 | and it is the program executed when you use the `run' command.\n\ |
| 719 | If FILE cannot be found as specified, your execution directory path\n\ |
| 720 | ($PATH) is searched for a command of that name.\n\ |
| 721 | No arg means to have no executable file and no symbols."), &cmdlist); |
| 722 | set_cmd_completer (c, filename_completer); |
| 723 | } |
| 724 | |
| 725 | c = add_cmd ("exec-file", class_files, exec_file_command, _("\ |
| 726 | Use FILE as program for getting contents of pure memory.\n\ |
| 727 | If FILE cannot be found as specified, your execution directory path\n\ |
| 728 | is searched for a command of that name.\n\ |
| 729 | No arg means have no executable file."), &cmdlist); |
| 730 | set_cmd_completer (c, filename_completer); |
| 731 | |
| 732 | add_com ("section", class_files, set_section_command, _("\ |
| 733 | Change the base address of section SECTION of the exec file to ADDR.\n\ |
| 734 | This can be used if the exec file does not contain section addresses,\n\ |
| 735 | (such as in the a.out format), or when the addresses specified in the\n\ |
| 736 | file itself are wrong. Each section must be changed separately. The\n\ |
| 737 | ``info files'' command lists all the sections and their addresses.")); |
| 738 | |
| 739 | add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ |
| 740 | Set writing into executable and core files."), _("\ |
| 741 | Show writing into executable and core files."), NULL, |
| 742 | NULL, |
| 743 | show_write_files, |
| 744 | &setlist, &showlist); |
| 745 | |
| 746 | add_target (&exec_ops); |
| 747 | } |
| 748 | |
| 749 | static char * |
| 750 | exec_make_note_section (bfd *obfd, int *note_size) |
| 751 | { |
| 752 | error (_("Can't create a corefile")); |
| 753 | } |