| 1 | /* Work with executable files, for GDB. |
| 2 | Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1997, 1998 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 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 | |
| 31 | #ifdef USG |
| 32 | #include <sys/types.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <fcntl.h> |
| 36 | #include "gdb_string.h" |
| 37 | |
| 38 | #include "gdbcore.h" |
| 39 | |
| 40 | #include <ctype.h> |
| 41 | #include "gdb_stat.h" |
| 42 | #ifndef O_BINARY |
| 43 | #define O_BINARY 0 |
| 44 | #endif |
| 45 | |
| 46 | #include "xcoffsolib.h" |
| 47 | |
| 48 | struct vmap *map_vmap PARAMS ((bfd *, bfd *)); |
| 49 | |
| 50 | void (*file_changed_hook) PARAMS ((char *)); |
| 51 | |
| 52 | /* Prototypes for local functions */ |
| 53 | |
| 54 | static void add_to_section_table PARAMS ((bfd *, sec_ptr, PTR)); |
| 55 | |
| 56 | static void exec_close PARAMS ((int)); |
| 57 | |
| 58 | static void file_command PARAMS ((char *, int)); |
| 59 | |
| 60 | static void set_section_command PARAMS ((char *, int)); |
| 61 | |
| 62 | static void exec_files_info PARAMS ((struct target_ops *)); |
| 63 | |
| 64 | static void bfdsec_to_vmap PARAMS ((bfd *, sec_ptr, PTR)); |
| 65 | |
| 66 | static int ignore PARAMS ((CORE_ADDR, char *)); |
| 67 | |
| 68 | static void init_exec_ops PARAMS ((void)); |
| 69 | |
| 70 | void _initialize_exec PARAMS ((void)); |
| 71 | |
| 72 | extern int info_verbose; |
| 73 | |
| 74 | /* The target vector for executable files. */ |
| 75 | |
| 76 | struct target_ops exec_ops; |
| 77 | |
| 78 | /* The Binary File Descriptor handle for the executable file. */ |
| 79 | |
| 80 | bfd *exec_bfd = NULL; |
| 81 | |
| 82 | /* Whether to open exec and core files read-only or read-write. */ |
| 83 | |
| 84 | int write_files = 0; |
| 85 | |
| 86 | /* Text start and end addresses (KLUDGE) if needed */ |
| 87 | |
| 88 | #ifndef NEED_TEXT_START_END |
| 89 | #define NEED_TEXT_START_END (0) |
| 90 | #endif |
| 91 | CORE_ADDR text_start = 0; |
| 92 | CORE_ADDR text_end = 0; |
| 93 | |
| 94 | struct vmap *vmap; |
| 95 | |
| 96 | /* ARGSUSED */ |
| 97 | static void |
| 98 | exec_close (quitting) |
| 99 | int quitting; |
| 100 | { |
| 101 | int need_symtab_cleanup = 0; |
| 102 | struct vmap *vp, *nxt; |
| 103 | |
| 104 | for (nxt = vmap; nxt != NULL;) |
| 105 | { |
| 106 | vp = nxt; |
| 107 | nxt = vp->nxt; |
| 108 | |
| 109 | /* if there is an objfile associated with this bfd, |
| 110 | free_objfile() will do proper cleanup of objfile *and* bfd. */ |
| 111 | |
| 112 | if (vp->objfile) |
| 113 | { |
| 114 | free_objfile (vp->objfile); |
| 115 | need_symtab_cleanup = 1; |
| 116 | } |
| 117 | else if (vp->bfd != exec_bfd) |
| 118 | /* FIXME-leak: We should be freeing vp->name too, I think. */ |
| 119 | if (!bfd_close (vp->bfd)) |
| 120 | warning ("cannot close \"%s\": %s", |
| 121 | vp->name, bfd_errmsg (bfd_get_error ())); |
| 122 | |
| 123 | /* FIXME: This routine is #if 0'd in symfile.c. What should we |
| 124 | be doing here? Should we just free everything in |
| 125 | vp->objfile->symtabs? Should free_objfile do that? |
| 126 | FIXME-as-well: free_objfile already free'd vp->name, so it isn't |
| 127 | valid here. */ |
| 128 | free_named_symtabs (vp->name); |
| 129 | free (vp); |
| 130 | } |
| 131 | |
| 132 | vmap = NULL; |
| 133 | |
| 134 | if (exec_bfd) |
| 135 | { |
| 136 | char *name = bfd_get_filename (exec_bfd); |
| 137 | |
| 138 | if (!bfd_close (exec_bfd)) |
| 139 | warning ("cannot close \"%s\": %s", |
| 140 | name, bfd_errmsg (bfd_get_error ())); |
| 141 | free (name); |
| 142 | exec_bfd = NULL; |
| 143 | } |
| 144 | |
| 145 | if (exec_ops.to_sections) |
| 146 | { |
| 147 | free ((PTR) exec_ops.to_sections); |
| 148 | exec_ops.to_sections = NULL; |
| 149 | exec_ops.to_sections_end = NULL; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | /* Process the first arg in ARGS as the new exec file. |
| 154 | |
| 155 | This function is intended to be behave essentially the same |
| 156 | as exec_file_command, except that the latter will detect when |
| 157 | a target is being debugged, and will ask the user whether it |
| 158 | should be shut down first. (If the answer is "no", then the |
| 159 | new file is ignored.) |
| 160 | |
| 161 | This file is used by exec_file_command, to do the work of opening |
| 162 | and processing the exec file after any prompting has happened. |
| 163 | |
| 164 | And, it is used by child_attach, when the attach command was |
| 165 | given a pid but not a exec pathname, and the attach command could |
| 166 | figure out the pathname from the pid. (In this case, we shouldn't |
| 167 | ask the user whether the current target should be shut down -- |
| 168 | we're supplying the exec pathname late for good reason.) */ |
| 169 | |
| 170 | void |
| 171 | exec_file_attach (args, from_tty) |
| 172 | char *args; |
| 173 | int from_tty; |
| 174 | { |
| 175 | char **argv; |
| 176 | char *filename; |
| 177 | |
| 178 | /* Remove any previous exec file. */ |
| 179 | unpush_target (&exec_ops); |
| 180 | |
| 181 | /* Now open and digest the file the user requested, if any. */ |
| 182 | |
| 183 | if (args) |
| 184 | { |
| 185 | char *scratch_pathname; |
| 186 | int scratch_chan; |
| 187 | |
| 188 | /* Scan through the args and pick up the first non option arg |
| 189 | as the filename. */ |
| 190 | |
| 191 | argv = buildargv (args); |
| 192 | if (argv == NULL) |
| 193 | nomem (0); |
| 194 | |
| 195 | make_cleanup_freeargv (argv); |
| 196 | |
| 197 | for (; (*argv != NULL) && (**argv == '-'); argv++) |
| 198 | {; |
| 199 | } |
| 200 | if (*argv == NULL) |
| 201 | error ("No executable file name was specified"); |
| 202 | |
| 203 | filename = tilde_expand (*argv); |
| 204 | make_cleanup (free, filename); |
| 205 | |
| 206 | scratch_chan = openp (getenv ("PATH"), 1, filename, |
| 207 | write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0, |
| 208 | &scratch_pathname); |
| 209 | #if defined(__GO32__) || defined(_WIN32) |
| 210 | if (scratch_chan < 0) |
| 211 | { |
| 212 | char *exename = alloca (strlen (filename) + 5); |
| 213 | strcat (strcpy (exename, filename), ".exe"); |
| 214 | scratch_chan = openp (getenv ("PATH"), 1, exename, write_files ? |
| 215 | O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0, &scratch_pathname); |
| 216 | } |
| 217 | #endif |
| 218 | if (scratch_chan < 0) |
| 219 | perror_with_name (filename); |
| 220 | exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
| 221 | |
| 222 | if (!exec_bfd) |
| 223 | error ("\"%s\": could not open as an executable file: %s", |
| 224 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 225 | |
| 226 | /* At this point, scratch_pathname and exec_bfd->name both point to the |
| 227 | same malloc'd string. However exec_close() will attempt to free it |
| 228 | via the exec_bfd->name pointer, so we need to make another copy and |
| 229 | leave exec_bfd as the new owner of the original copy. */ |
| 230 | scratch_pathname = xstrdup (scratch_pathname); |
| 231 | make_cleanup (free, scratch_pathname); |
| 232 | |
| 233 | if (!bfd_check_format (exec_bfd, bfd_object)) |
| 234 | { |
| 235 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 236 | it. */ |
| 237 | exec_close (0); |
| 238 | error ("\"%s\": not in executable format: %s", |
| 239 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 240 | } |
| 241 | |
| 242 | /* FIXME - This should only be run for RS6000, but the ifdef is a poor |
| 243 | way to accomplish. */ |
| 244 | #ifdef IBM6000_TARGET |
| 245 | /* Setup initial vmap. */ |
| 246 | |
| 247 | map_vmap (exec_bfd, 0); |
| 248 | if (vmap == NULL) |
| 249 | { |
| 250 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 251 | it. */ |
| 252 | exec_close (0); |
| 253 | error ("\"%s\": can't find the file sections: %s", |
| 254 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 255 | } |
| 256 | #endif /* IBM6000_TARGET */ |
| 257 | |
| 258 | if (build_section_table (exec_bfd, &exec_ops.to_sections, |
| 259 | &exec_ops.to_sections_end)) |
| 260 | { |
| 261 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 262 | it. */ |
| 263 | exec_close (0); |
| 264 | error ("\"%s\": can't find the file sections: %s", |
| 265 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 266 | } |
| 267 | |
| 268 | /* text_end is sometimes used for where to put call dummies. A |
| 269 | few ports use these for other purposes too. */ |
| 270 | if (NEED_TEXT_START_END) |
| 271 | { |
| 272 | struct section_table *p; |
| 273 | |
| 274 | /* Set text_start to the lowest address of the start of any |
| 275 | readonly code section and set text_end to the highest |
| 276 | address of the end of any readonly code section. */ |
| 277 | /* FIXME: The comment above does not match the code. The |
| 278 | code checks for sections with are either code *or* |
| 279 | readonly. */ |
| 280 | text_start = ~(CORE_ADDR) 0; |
| 281 | text_end = (CORE_ADDR) 0; |
| 282 | for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) |
| 283 | if (bfd_get_section_flags (p->bfd, p->the_bfd_section) |
| 284 | & (SEC_CODE | SEC_READONLY)) |
| 285 | { |
| 286 | if (text_start > p->addr) |
| 287 | text_start = p->addr; |
| 288 | if (text_end < p->endaddr) |
| 289 | text_end = p->endaddr; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | validate_files (); |
| 294 | |
| 295 | set_gdbarch_from_file (exec_bfd); |
| 296 | |
| 297 | push_target (&exec_ops); |
| 298 | |
| 299 | /* Tell display code (if any) about the changed file name. */ |
| 300 | if (exec_file_display_hook) |
| 301 | (*exec_file_display_hook) (filename); |
| 302 | } |
| 303 | else if (from_tty) |
| 304 | printf_unfiltered ("No executable file now.\n"); |
| 305 | } |
| 306 | |
| 307 | /* Process the first arg in ARGS as the new exec file. |
| 308 | |
| 309 | Note that we have to explicitly ignore additional args, since we can |
| 310 | be called from file_command(), which also calls symbol_file_command() |
| 311 | which can take multiple args. */ |
| 312 | |
| 313 | void |
| 314 | exec_file_command (args, from_tty) |
| 315 | char *args; |
| 316 | int from_tty; |
| 317 | { |
| 318 | target_preopen (from_tty); |
| 319 | exec_file_attach (args, from_tty); |
| 320 | } |
| 321 | |
| 322 | /* Set both the exec file and the symbol file, in one command. |
| 323 | What a novelty. Why did GDB go through four major releases before this |
| 324 | command was added? */ |
| 325 | |
| 326 | static void |
| 327 | file_command (arg, from_tty) |
| 328 | char *arg; |
| 329 | int from_tty; |
| 330 | { |
| 331 | /* FIXME, if we lose on reading the symbol file, we should revert |
| 332 | the exec file, but that's rough. */ |
| 333 | exec_file_command (arg, from_tty); |
| 334 | symbol_file_command (arg, from_tty); |
| 335 | if (file_changed_hook) |
| 336 | file_changed_hook (arg); |
| 337 | } |
| 338 | \f |
| 339 | |
| 340 | /* Locate all mappable sections of a BFD file. |
| 341 | table_pp_char is a char * to get it through bfd_map_over_sections; |
| 342 | we cast it back to its proper type. */ |
| 343 | |
| 344 | static void |
| 345 | add_to_section_table (abfd, asect, table_pp_char) |
| 346 | bfd *abfd; |
| 347 | sec_ptr asect; |
| 348 | PTR table_pp_char; |
| 349 | { |
| 350 | struct section_table **table_pp = (struct section_table **) table_pp_char; |
| 351 | flagword aflag; |
| 352 | |
| 353 | aflag = bfd_get_section_flags (abfd, asect); |
| 354 | if (!(aflag & SEC_ALLOC)) |
| 355 | return; |
| 356 | if (0 == bfd_section_size (abfd, asect)) |
| 357 | return; |
| 358 | (*table_pp)->bfd = abfd; |
| 359 | (*table_pp)->the_bfd_section = asect; |
| 360 | (*table_pp)->addr = bfd_section_vma (abfd, asect); |
| 361 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); |
| 362 | (*table_pp)++; |
| 363 | } |
| 364 | |
| 365 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
| 366 | Returns 0 if OK, 1 on error. */ |
| 367 | |
| 368 | int |
| 369 | build_section_table (some_bfd, start, end) |
| 370 | bfd *some_bfd; |
| 371 | struct section_table **start, **end; |
| 372 | { |
| 373 | unsigned count; |
| 374 | |
| 375 | count = bfd_count_sections (some_bfd); |
| 376 | if (*start) |
| 377 | free ((PTR) * start); |
| 378 | *start = (struct section_table *) xmalloc (count * sizeof (**start)); |
| 379 | *end = *start; |
| 380 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); |
| 381 | if (*end > *start + count) |
| 382 | abort (); |
| 383 | /* We could realloc the table, but it probably loses for most files. */ |
| 384 | return 0; |
| 385 | } |
| 386 | \f |
| 387 | static void |
| 388 | bfdsec_to_vmap (abfd, sect, arg3) |
| 389 | bfd *abfd; |
| 390 | sec_ptr sect; |
| 391 | PTR arg3; |
| 392 | { |
| 393 | struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3; |
| 394 | struct vmap *vp; |
| 395 | |
| 396 | vp = vmap_bfd->pvmap; |
| 397 | |
| 398 | if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0) |
| 399 | return; |
| 400 | |
| 401 | if (STREQ (bfd_section_name (abfd, sect), ".text")) |
| 402 | { |
| 403 | vp->tstart = bfd_section_vma (abfd, sect); |
| 404 | vp->tend = vp->tstart + bfd_section_size (abfd, sect); |
| 405 | vp->tvma = bfd_section_vma (abfd, sect); |
| 406 | vp->toffs = sect->filepos; |
| 407 | } |
| 408 | else if (STREQ (bfd_section_name (abfd, sect), ".data")) |
| 409 | { |
| 410 | vp->dstart = bfd_section_vma (abfd, sect); |
| 411 | vp->dend = vp->dstart + bfd_section_size (abfd, sect); |
| 412 | vp->dvma = bfd_section_vma (abfd, sect); |
| 413 | } |
| 414 | /* Silently ignore other types of sections. (FIXME?) */ |
| 415 | } |
| 416 | |
| 417 | /* Make a vmap for ABFD which might be a member of the archive ARCH. |
| 418 | Return the new vmap. */ |
| 419 | |
| 420 | struct vmap * |
| 421 | map_vmap (abfd, arch) |
| 422 | bfd *abfd; |
| 423 | bfd *arch; |
| 424 | { |
| 425 | struct vmap_and_bfd vmap_bfd; |
| 426 | struct vmap *vp, **vpp; |
| 427 | |
| 428 | vp = (struct vmap *) xmalloc (sizeof (*vp)); |
| 429 | memset ((char *) vp, '\0', sizeof (*vp)); |
| 430 | vp->nxt = 0; |
| 431 | vp->bfd = abfd; |
| 432 | vp->name = bfd_get_filename (arch ? arch : abfd); |
| 433 | vp->member = arch ? bfd_get_filename (abfd) : ""; |
| 434 | |
| 435 | vmap_bfd.pbfd = arch; |
| 436 | vmap_bfd.pvmap = vp; |
| 437 | bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd); |
| 438 | |
| 439 | /* Find the end of the list and append. */ |
| 440 | for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) |
| 441 | ; |
| 442 | *vpp = vp; |
| 443 | |
| 444 | return vp; |
| 445 | } |
| 446 | \f |
| 447 | /* Read or write the exec file. |
| 448 | |
| 449 | Args are address within a BFD file, address within gdb address-space, |
| 450 | length, and a flag indicating whether to read or write. |
| 451 | |
| 452 | Result is a length: |
| 453 | |
| 454 | 0: We cannot handle this address and length. |
| 455 | > 0: We have handled N bytes starting at this address. |
| 456 | (If N == length, we did it all.) We might be able |
| 457 | to handle more bytes beyond this length, but no |
| 458 | promises. |
| 459 | < 0: We cannot handle this address, but if somebody |
| 460 | else handles (-N) bytes, we can start from there. |
| 461 | |
| 462 | The same routine is used to handle both core and exec files; |
| 463 | we just tail-call it with more arguments to select between them. */ |
| 464 | |
| 465 | int |
| 466 | xfer_memory (memaddr, myaddr, len, write, target) |
| 467 | CORE_ADDR memaddr; |
| 468 | char *myaddr; |
| 469 | int len; |
| 470 | int write; |
| 471 | struct target_ops *target; |
| 472 | { |
| 473 | boolean res; |
| 474 | struct section_table *p; |
| 475 | CORE_ADDR nextsectaddr, memend; |
| 476 | boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type)); |
| 477 | asection *section; |
| 478 | |
| 479 | if (len <= 0) |
| 480 | abort (); |
| 481 | |
| 482 | if (overlay_debugging) |
| 483 | { |
| 484 | section = find_pc_overlay (memaddr); |
| 485 | if (pc_in_unmapped_range (memaddr, section)) |
| 486 | memaddr = overlay_mapped_address (memaddr, section); |
| 487 | } |
| 488 | |
| 489 | memend = memaddr + len; |
| 490 | xfer_fn = write ? bfd_set_section_contents : bfd_get_section_contents; |
| 491 | nextsectaddr = memend; |
| 492 | |
| 493 | #if 0 /* Stu's implementation */ |
| 494 | /* If a section has been specified, try to use it. Note that we cannot use the |
| 495 | specified section directly. This is because it usually comes from the |
| 496 | symbol file, which may be different from the exec or core file. Instead, we |
| 497 | have to lookup the specified section by name in the bfd associated with |
| 498 | to_sections. */ |
| 499 | |
| 500 | if (target_memory_bfd_section) |
| 501 | { |
| 502 | asection *s; |
| 503 | bfd *abfd; |
| 504 | asection *target_section; |
| 505 | bfd *target_bfd; |
| 506 | |
| 507 | s = target_memory_bfd_section; |
| 508 | abfd = s->owner; |
| 509 | |
| 510 | target_bfd = target->to_sections->bfd; |
| 511 | target_section = bfd_get_section_by_name (target_bfd, bfd_section_name (abfd, s)); |
| 512 | |
| 513 | if (target_section) |
| 514 | { |
| 515 | bfd_vma sec_addr; |
| 516 | bfd_size_type sec_size; |
| 517 | |
| 518 | sec_addr = bfd_section_vma (target_bfd, target_section); |
| 519 | sec_size = target_section->_raw_size; |
| 520 | |
| 521 | /* Make sure the requested memory starts inside the section. */ |
| 522 | |
| 523 | if (memaddr >= sec_addr |
| 524 | && memaddr < sec_addr + sec_size) |
| 525 | { |
| 526 | /* Cut back length in case request overflows the end of the section. */ |
| 527 | len = min (len, sec_addr + sec_size - memaddr); |
| 528 | |
| 529 | res = xfer_fn (target_bfd, target_section, myaddr, memaddr - sec_addr, len); |
| 530 | |
| 531 | return res ? len : 0; |
| 532 | } |
| 533 | } |
| 534 | } |
| 535 | #endif /* 0, Stu's implementation */ |
| 536 | for (p = target->to_sections; p < target->to_sections_end; p++) |
| 537 | { |
| 538 | if (overlay_debugging && section && p->the_bfd_section && |
| 539 | strcmp (section->name, p->the_bfd_section->name) != 0) |
| 540 | continue; /* not the section we need */ |
| 541 | if (memaddr >= p->addr) |
| 542 | if (memend <= p->endaddr) |
| 543 | { |
| 544 | /* Entire transfer is within this section. */ |
| 545 | res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, |
| 546 | memaddr - p->addr, len); |
| 547 | return (res != 0) ? len : 0; |
| 548 | } |
| 549 | else if (memaddr >= p->endaddr) |
| 550 | { |
| 551 | /* This section ends before the transfer starts. */ |
| 552 | continue; |
| 553 | } |
| 554 | else |
| 555 | { |
| 556 | /* This section overlaps the transfer. Just do half. */ |
| 557 | len = p->endaddr - memaddr; |
| 558 | res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, |
| 559 | memaddr - p->addr, len); |
| 560 | return (res != 0) ? len : 0; |
| 561 | } |
| 562 | else |
| 563 | nextsectaddr = min (nextsectaddr, p->addr); |
| 564 | } |
| 565 | |
| 566 | if (nextsectaddr >= memend) |
| 567 | return 0; /* We can't help */ |
| 568 | else |
| 569 | return -(nextsectaddr - memaddr); /* Next boundary where we can help */ |
| 570 | } |
| 571 | \f |
| 572 | |
| 573 | void |
| 574 | print_section_info (t, abfd) |
| 575 | struct target_ops *t; |
| 576 | bfd *abfd; |
| 577 | { |
| 578 | struct section_table *p; |
| 579 | |
| 580 | printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); |
| 581 | wrap_here (" "); |
| 582 | printf_filtered ("file type %s.\n", bfd_get_target (abfd)); |
| 583 | if (abfd == exec_bfd) |
| 584 | { |
| 585 | printf_filtered ("\tEntry point: "); |
| 586 | print_address_numeric (bfd_get_start_address (abfd), 1, gdb_stdout); |
| 587 | printf_filtered ("\n"); |
| 588 | } |
| 589 | for (p = t->to_sections; p < t->to_sections_end; p++) |
| 590 | { |
| 591 | /* FIXME-32x64 need a print_address_numeric with field width */ |
| 592 | printf_filtered ("\t%s", local_hex_string_custom ((unsigned long) p->addr, "08l")); |
| 593 | printf_filtered (" - %s", local_hex_string_custom ((unsigned long) p->endaddr, "08l")); |
| 594 | if (info_verbose) |
| 595 | printf_filtered (" @ %s", |
| 596 | local_hex_string_custom ((unsigned long) p->the_bfd_section->filepos, "08l")); |
| 597 | printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section)); |
| 598 | if (p->bfd != abfd) |
| 599 | { |
| 600 | printf_filtered (" in %s", bfd_get_filename (p->bfd)); |
| 601 | } |
| 602 | printf_filtered ("\n"); |
| 603 | } |
| 604 | } |
| 605 | |
| 606 | static void |
| 607 | exec_files_info (t) |
| 608 | struct target_ops *t; |
| 609 | { |
| 610 | print_section_info (t, exec_bfd); |
| 611 | |
| 612 | if (vmap) |
| 613 | { |
| 614 | struct vmap *vp; |
| 615 | |
| 616 | printf_unfiltered ("\tMapping info for file `%s'.\n", vmap->name); |
| 617 | printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n", |
| 618 | strlen_paddr (), "tstart", |
| 619 | strlen_paddr (), "tend", |
| 620 | strlen_paddr (), "dstart", |
| 621 | strlen_paddr (), "dend", |
| 622 | "section", |
| 623 | "file(member)"); |
| 624 | |
| 625 | for (vp = vmap; vp; vp = vp->nxt) |
| 626 | printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n", |
| 627 | paddr (vp->tstart), |
| 628 | paddr (vp->tend), |
| 629 | paddr (vp->dstart), |
| 630 | paddr (vp->dend), |
| 631 | vp->name, |
| 632 | *vp->member ? "(" : "", vp->member, |
| 633 | *vp->member ? ")" : ""); |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /* msnyder 5/21/99: |
| 638 | exec_set_section_offsets sets the offsets of all the sections |
| 639 | in the exec objfile. */ |
| 640 | |
| 641 | void |
| 642 | exec_set_section_offsets (text_off, data_off, bss_off) |
| 643 | bfd_signed_vma text_off; |
| 644 | bfd_signed_vma data_off; |
| 645 | bfd_signed_vma bss_off; |
| 646 | { |
| 647 | struct section_table *sect; |
| 648 | |
| 649 | for (sect = exec_ops.to_sections; |
| 650 | sect < exec_ops.to_sections_end; |
| 651 | sect++) |
| 652 | { |
| 653 | flagword flags; |
| 654 | |
| 655 | flags = bfd_get_section_flags (exec_bfd, sect->the_bfd_section); |
| 656 | |
| 657 | if (flags & SEC_CODE) |
| 658 | { |
| 659 | sect->addr += text_off; |
| 660 | sect->endaddr += text_off; |
| 661 | } |
| 662 | else if (flags & (SEC_DATA | SEC_LOAD)) |
| 663 | { |
| 664 | sect->addr += data_off; |
| 665 | sect->endaddr += data_off; |
| 666 | } |
| 667 | else if (flags & SEC_ALLOC) |
| 668 | { |
| 669 | sect->addr += bss_off; |
| 670 | sect->endaddr += bss_off; |
| 671 | } |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | static void |
| 676 | set_section_command (args, from_tty) |
| 677 | char *args; |
| 678 | int from_tty; |
| 679 | { |
| 680 | struct section_table *p; |
| 681 | char *secname; |
| 682 | unsigned seclen; |
| 683 | unsigned long secaddr; |
| 684 | char secprint[100]; |
| 685 | long offset; |
| 686 | |
| 687 | if (args == 0) |
| 688 | error ("Must specify section name and its virtual address"); |
| 689 | |
| 690 | /* Parse out section name */ |
| 691 | for (secname = args; !isspace (*args); args++); |
| 692 | seclen = args - secname; |
| 693 | |
| 694 | /* Parse out new virtual address */ |
| 695 | secaddr = parse_and_eval_address (args); |
| 696 | |
| 697 | for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) |
| 698 | { |
| 699 | if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen) |
| 700 | && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') |
| 701 | { |
| 702 | offset = secaddr - p->addr; |
| 703 | p->addr += offset; |
| 704 | p->endaddr += offset; |
| 705 | if (from_tty) |
| 706 | exec_files_info (&exec_ops); |
| 707 | return; |
| 708 | } |
| 709 | } |
| 710 | if (seclen >= sizeof (secprint)) |
| 711 | seclen = sizeof (secprint) - 1; |
| 712 | strncpy (secprint, secname, seclen); |
| 713 | secprint[seclen] = '\0'; |
| 714 | error ("Section %s not found", secprint); |
| 715 | } |
| 716 | |
| 717 | /* If mourn is being called in all the right places, this could be say |
| 718 | `gdb internal error' (since generic_mourn calls |
| 719 | breakpoint_init_inferior). */ |
| 720 | |
| 721 | static int |
| 722 | ignore (addr, contents) |
| 723 | CORE_ADDR addr; |
| 724 | char *contents; |
| 725 | { |
| 726 | return 0; |
| 727 | } |
| 728 | |
| 729 | /* Fill in the exec file target vector. Very few entries need to be |
| 730 | defined. */ |
| 731 | |
| 732 | void |
| 733 | init_exec_ops () |
| 734 | { |
| 735 | exec_ops.to_shortname = "exec"; |
| 736 | exec_ops.to_longname = "Local exec file"; |
| 737 | exec_ops.to_doc = "Use an executable file as a target.\n\ |
| 738 | Specify the filename of the executable file."; |
| 739 | exec_ops.to_open = exec_file_command; |
| 740 | exec_ops.to_close = exec_close; |
| 741 | exec_ops.to_attach = find_default_attach; |
| 742 | exec_ops.to_require_attach = find_default_require_attach; |
| 743 | exec_ops.to_require_detach = find_default_require_detach; |
| 744 | exec_ops.to_xfer_memory = xfer_memory; |
| 745 | exec_ops.to_files_info = exec_files_info; |
| 746 | exec_ops.to_insert_breakpoint = ignore; |
| 747 | exec_ops.to_remove_breakpoint = ignore; |
| 748 | exec_ops.to_create_inferior = find_default_create_inferior; |
| 749 | exec_ops.to_clone_and_follow_inferior = find_default_clone_and_follow_inferior; |
| 750 | exec_ops.to_stratum = file_stratum; |
| 751 | exec_ops.to_has_memory = 1; |
| 752 | exec_ops.to_magic = OPS_MAGIC; |
| 753 | } |
| 754 | |
| 755 | void |
| 756 | _initialize_exec () |
| 757 | { |
| 758 | struct cmd_list_element *c; |
| 759 | |
| 760 | init_exec_ops (); |
| 761 | |
| 762 | if (!dbx_commands) |
| 763 | { |
| 764 | c = add_cmd ("file", class_files, file_command, |
| 765 | "Use FILE as program to be debugged.\n\ |
| 766 | It is read for its symbols, for getting the contents of pure memory,\n\ |
| 767 | and it is the program executed when you use the `run' command.\n\ |
| 768 | If FILE cannot be found as specified, your execution directory path\n\ |
| 769 | ($PATH) is searched for a command of that name.\n\ |
| 770 | No arg means to have no executable file and no symbols.", &cmdlist); |
| 771 | c->completer = filename_completer; |
| 772 | } |
| 773 | |
| 774 | c = add_cmd ("exec-file", class_files, exec_file_command, |
| 775 | "Use FILE as program for getting contents of pure memory.\n\ |
| 776 | If FILE cannot be found as specified, your execution directory path\n\ |
| 777 | is searched for a command of that name.\n\ |
| 778 | No arg means have no executable file.", &cmdlist); |
| 779 | c->completer = filename_completer; |
| 780 | |
| 781 | add_com ("section", class_files, set_section_command, |
| 782 | "Change the base address of section SECTION of the exec file to ADDR.\n\ |
| 783 | This can be used if the exec file does not contain section addresses,\n\ |
| 784 | (such as in the a.out format), or when the addresses specified in the\n\ |
| 785 | file itself are wrong. Each section must be changed separately. The\n\ |
| 786 | ``info files'' command lists all the sections and their addresses."); |
| 787 | |
| 788 | add_show_from_set |
| 789 | (add_set_cmd ("write", class_support, var_boolean, (char *) &write_files, |
| 790 | "Set writing into executable and core files.", |
| 791 | &setlist), |
| 792 | &showlist); |
| 793 | |
| 794 | add_target (&exec_ops); |
| 795 | } |