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 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21#include "defs.h" 22#include "frame.h" 23#include "inferior.h" 24#include "target.h" 25#include "gdbcmd.h" 26#include "language.h" 27#include "symfile.h" 28#include "objfiles.h" 29#include "completer.h" 30#include "value.h" 31#include "exec.h" 32#include "observer.h" 33 34#include <fcntl.h> 35#include "readline/readline.h" 36#include "gdb_string.h" 37 38#include "gdbcore.h" 39 40#include <ctype.h> 41#include "gdb_stat.h" 42 43#include "xcoffsolib.h" 44 45struct vmap *map_vmap (bfd *, bfd *); 46 47void (*deprecated_file_changed_hook) (char *); 48 49/* Prototypes for local functions */ 50 51static void exec_close (int); 52 53static void file_command (char *, int); 54 55static void set_section_command (char *, int); 56 57static void exec_files_info (struct target_ops *); 58 59static void init_exec_ops (void); 60 61void _initialize_exec (void); 62 63/* The target vector for executable files. */ 64 65struct target_ops exec_ops; 66 67/* The Binary File Descriptor handle for the executable file. */ 68 69bfd *exec_bfd = NULL; 70 71/* Whether to open exec and core files read-only or read-write. */ 72 73int write_files = 0; 74static void 75show_write_files (struct ui_file *file, int from_tty, 76 struct cmd_list_element *c, const char *value) 77{ 78 fprintf_filtered (file, _("Writing into executable and core files is %s.\n"), 79 value); 80} 81 82 83struct vmap *vmap; 84 85static void 86exec_open (char *args, int from_tty) 87{ 88 target_preopen (from_tty); 89 exec_file_attach (args, from_tty); 90} 91 92static void 93exec_close (int quitting) 94{ 95 int need_symtab_cleanup = 0; 96 struct vmap *vp, *nxt; 97 98 for (nxt = vmap; nxt != NULL;) 99 { 100 vp = nxt; 101 nxt = vp->nxt; 102 103 /* if there is an objfile associated with this bfd, 104 free_objfile() will do proper cleanup of objfile *and* bfd. */ 105 106 if (vp->objfile) 107 { 108 free_objfile (vp->objfile); 109 need_symtab_cleanup = 1; 110 } 111 else if (vp->bfd != exec_bfd) 112 /* FIXME-leak: We should be freeing vp->name too, I think. */ 113 if (!bfd_close (vp->bfd)) 114 warning (_("cannot close \"%s\": %s"), 115 vp->name, bfd_errmsg (bfd_get_error ())); 116 117 /* FIXME: This routine is #if 0'd in symfile.c. What should we 118 be doing here? Should we just free everything in 119 vp->objfile->symtabs? Should free_objfile do that? 120 FIXME-as-well: free_objfile already free'd vp->name, so it isn't 121 valid here. */ 122 free_named_symtabs (vp->name); 123 xfree (vp); 124 } 125 126 vmap = NULL; 127 128 if (exec_bfd) 129 { 130 char *name = bfd_get_filename (exec_bfd); 131 132 if (!bfd_close (exec_bfd)) 133 warning (_("cannot close \"%s\": %s"), 134 name, bfd_errmsg (bfd_get_error ())); 135 xfree (name); 136 exec_bfd = NULL; 137 } 138 139 if (exec_ops.to_sections) 140 { 141 xfree (exec_ops.to_sections); 142 exec_ops.to_sections = NULL; 143 exec_ops.to_sections_end = NULL; 144 } 145} 146 147void 148exec_file_clear (int from_tty) 149{ 150 /* Remove exec file. */ 151 unpush_target (&exec_ops); 152 153 if (from_tty) 154 printf_unfiltered (_("No executable file now.\n")); 155} 156 157/* Process the first arg in ARGS as the new exec file. 158 159 This function is intended to be behave essentially the same 160 as exec_file_command, except that the latter will detect when 161 a target is being debugged, and will ask the user whether it 162 should be shut down first. (If the answer is "no", then the 163 new file is ignored.) 164 165 This file is used by exec_file_command, to do the work of opening 166 and processing the exec file after any prompting has happened. 167 168 And, it is used by child_attach, when the attach command was 169 given a pid but not a exec pathname, and the attach command could 170 figure out the pathname from the pid. (In this case, we shouldn't 171 ask the user whether the current target should be shut down -- 172 we're supplying the exec pathname late for good reason.) 173 174 ARGS is assumed to be the filename. */ 175 176void 177exec_file_attach (char *filename, int from_tty) 178{ 179 /* Remove any previous exec file. */ 180 unpush_target (&exec_ops); 181 182 /* Now open and digest the file the user requested, if any. */ 183 184 if (!filename) 185 { 186 if (from_tty) 187 printf_unfiltered (_("No executable file now.\n")); 188 189 set_gdbarch_from_file (NULL); 190 } 191 else 192 { 193 char *scratch_pathname; 194 int scratch_chan; 195 196 scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename, 197 write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0, 198 &scratch_pathname); 199#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__) 200 if (scratch_chan < 0) 201 { 202 char *exename = alloca (strlen (filename) + 5); 203 strcat (strcpy (exename, filename), ".exe"); 204 scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, 205 write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0, 206 &scratch_pathname); 207 } 208#endif 209 if (scratch_chan < 0) 210 perror_with_name (filename); 211 exec_bfd = bfd_fopen (scratch_pathname, gnutarget, 212 write_files ? FOPEN_RUB : FOPEN_RB, 213 scratch_chan); 214 215 if (!exec_bfd) 216 error (_("\"%s\": could not open as an executable file: %s"), 217 scratch_pathname, bfd_errmsg (bfd_get_error ())); 218 219 /* At this point, scratch_pathname and exec_bfd->name both point to the 220 same malloc'd string. However exec_close() will attempt to free it 221 via the exec_bfd->name pointer, so we need to make another copy and 222 leave exec_bfd as the new owner of the original copy. */ 223 scratch_pathname = xstrdup (scratch_pathname); 224 make_cleanup (xfree, scratch_pathname); 225 226 if (!bfd_check_format (exec_bfd, bfd_object)) 227 { 228 /* Make sure to close exec_bfd, or else "run" might try to use 229 it. */ 230 exec_close (0); 231 error (_("\"%s\": not in executable format: %s"), 232 scratch_pathname, bfd_errmsg (bfd_get_error ())); 233 } 234 235 /* FIXME - This should only be run for RS6000, but the ifdef is a poor 236 way to accomplish. */ 237#ifdef DEPRECATED_IBM6000_TARGET 238 /* Setup initial vmap. */ 239 240 map_vmap (exec_bfd, 0); 241 if (vmap == NULL) 242 { 243 /* Make sure to close exec_bfd, or else "run" might try to use 244 it. */ 245 exec_close (0); 246 error (_("\"%s\": can't find the file sections: %s"), 247 scratch_pathname, bfd_errmsg (bfd_get_error ())); 248 } 249#endif /* DEPRECATED_IBM6000_TARGET */ 250 251 if (build_section_table (exec_bfd, &exec_ops.to_sections, 252 &exec_ops.to_sections_end)) 253 { 254 /* Make sure to close exec_bfd, or else "run" might try to use 255 it. */ 256 exec_close (0); 257 error (_("\"%s\": can't find the file sections: %s"), 258 scratch_pathname, bfd_errmsg (bfd_get_error ())); 259 } 260 261 validate_files (); 262 263 set_gdbarch_from_file (exec_bfd); 264 265 push_target (&exec_ops); 266 267 /* Tell display code (if any) about the changed file name. */ 268 if (deprecated_exec_file_display_hook) 269 (*deprecated_exec_file_display_hook) (filename); 270 } 271 bfd_cache_close_all (); 272 observer_notify_executable_changed (NULL); 273} 274 275/* Process the first arg in ARGS as the new exec file. 276 277 Note that we have to explicitly ignore additional args, since we can 278 be called from file_command(), which also calls symbol_file_command() 279 which can take multiple args. 280 281 If ARGS is NULL, we just want to close the exec file. */ 282 283static void 284exec_file_command (char *args, int from_tty) 285{ 286 char **argv; 287 char *filename; 288 289 if (from_tty && target_has_execution 290 && !query (_("A program is being debugged already.\n" 291 "Are you sure you want to change the file? "))) 292 error (_("File not changed.")); 293 294 if (args) 295 { 296 /* Scan through the args and pick up the first non option arg 297 as the filename. */ 298 299 argv = buildargv (args); 300 if (argv == NULL) 301 nomem (0); 302 303 make_cleanup_freeargv (argv); 304 305 for (; (*argv != NULL) && (**argv == '-'); argv++) 306 {; 307 } 308 if (*argv == NULL) 309 error (_("No executable file name was specified")); 310 311 filename = tilde_expand (*argv); 312 make_cleanup (xfree, filename); 313 exec_file_attach (filename, from_tty); 314 } 315 else 316 exec_file_attach (NULL, from_tty); 317} 318 319/* Set both the exec file and the symbol file, in one command. 320 What a novelty. Why did GDB go through four major releases before this 321 command was added? */ 322 323static void 324file_command (char *arg, int from_tty) 325{ 326 /* FIXME, if we lose on reading the symbol file, we should revert 327 the exec file, but that's rough. */ 328 exec_file_command (arg, from_tty); 329 symbol_file_command (arg, from_tty); 330 if (deprecated_file_changed_hook) 331 deprecated_file_changed_hook (arg); 332} 333 334 335/* Locate all mappable sections of a BFD file. 336 table_pp_char is a char * to get it through bfd_map_over_sections; 337 we cast it back to its proper type. */ 338 339static void 340add_to_section_table (bfd *abfd, struct bfd_section *asect, 341 void *table_pp_char) 342{ 343 struct section_table **table_pp = (struct section_table **) table_pp_char; 344 flagword aflag; 345 346 /* Check the section flags, but do not discard zero-length sections, since 347 some symbols may still be attached to this section. For instance, we 348 encountered on sparc-solaris 2.10 a shared library with an empty .bss 349 section to which a symbol named "_end" was attached. The address 350 of this symbol still needs to be relocated. */ 351 aflag = bfd_get_section_flags (abfd, asect); 352 if (!(aflag & SEC_ALLOC)) 353 return; 354 355 (*table_pp)->bfd = abfd; 356 (*table_pp)->the_bfd_section = asect; 357 (*table_pp)->addr = bfd_section_vma (abfd, asect); 358 (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); 359 (*table_pp)++; 360} 361 362/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. 363 Returns 0 if OK, 1 on error. */ 364 365int 366build_section_table (struct bfd *some_bfd, struct section_table **start, 367 struct section_table **end) 368{ 369 unsigned count; 370 371 count = bfd_count_sections (some_bfd); 372 if (*start) 373 xfree (* start); 374 *start = (struct section_table *) xmalloc (count * sizeof (**start)); 375 *end = *start; 376 bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end); 377 if (*end > *start + count) 378 internal_error (__FILE__, __LINE__, _("failed internal consistency check")); 379 /* We could realloc the table, but it probably loses for most files. */ 380 return 0; 381} 382 383static void 384bfdsec_to_vmap (struct bfd *abfd, struct bfd_section *sect, void *arg3) 385{ 386 struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3; 387 struct vmap *vp; 388 389 vp = vmap_bfd->pvmap; 390 391 if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0) 392 return; 393 394 if (strcmp (bfd_section_name (abfd, sect), ".text") == 0) 395 { 396 vp->tstart = bfd_section_vma (abfd, sect); 397 vp->tend = vp->tstart + bfd_section_size (abfd, sect); 398 vp->tvma = bfd_section_vma (abfd, sect); 399 vp->toffs = sect->filepos; 400 } 401 else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0) 402 { 403 vp->dstart = bfd_section_vma (abfd, sect); 404 vp->dend = vp->dstart + bfd_section_size (abfd, sect); 405 vp->dvma = bfd_section_vma (abfd, sect); 406 } 407 /* Silently ignore other types of sections. (FIXME?) */ 408} 409 410/* Make a vmap for ABFD which might be a member of the archive ARCH. 411 Return the new vmap. */ 412 413struct vmap * 414map_vmap (bfd *abfd, bfd *arch) 415{ 416 struct vmap_and_bfd vmap_bfd; 417 struct vmap *vp, **vpp; 418 419 vp = (struct vmap *) xmalloc (sizeof (*vp)); 420 memset ((char *) vp, '\0', sizeof (*vp)); 421 vp->nxt = 0; 422 vp->bfd = abfd; 423 vp->name = bfd_get_filename (arch ? arch : abfd); 424 vp->member = arch ? bfd_get_filename (abfd) : ""; 425 426 vmap_bfd.pbfd = arch; 427 vmap_bfd.pvmap = vp; 428 bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd); 429 430 /* Find the end of the list and append. */ 431 for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) 432 ; 433 *vpp = vp; 434 435 return vp; 436} 437 438/* Read or write the exec file. 439 440 Args are address within a BFD file, address within gdb address-space, 441 length, and a flag indicating whether to read or write. 442 443 Result is a length: 444 445 0: We cannot handle this address and length. 446 > 0: We have handled N bytes starting at this address. 447 (If N == length, we did it all.) We might be able 448 to handle more bytes beyond this length, but no 449 promises. 450 < 0: We cannot handle this address, but if somebody 451 else handles (-N) bytes, we can start from there. 452 453 The same routine is used to handle both core and exec files; 454 we just tail-call it with more arguments to select between them. */ 455 456int 457xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, 458 struct mem_attrib *attrib, struct target_ops *target) 459{ 460 int res; 461 struct section_table *p; 462 CORE_ADDR nextsectaddr, memend; 463 asection *section = NULL; 464 465 if (len <= 0) 466 internal_error (__FILE__, __LINE__, _("failed internal consistency check")); 467 468 if (overlay_debugging) 469 { 470 section = find_pc_overlay (memaddr); 471 if (pc_in_unmapped_range (memaddr, section)) 472 memaddr = overlay_mapped_address (memaddr, section); 473 } 474 475 memend = memaddr + len; 476 nextsectaddr = memend; 477 478 for (p = target->to_sections; p < target->to_sections_end; p++) 479 { 480 if (overlay_debugging && section && 481 strcmp (section->name, p->the_bfd_section->name) != 0) 482 continue; /* not the section we need */ 483 if (memaddr >= p->addr) 484 { 485 if (memend <= p->endaddr) 486 { 487 /* Entire transfer is within this section. */ 488 if (write) 489 res = bfd_set_section_contents (p->bfd, p->the_bfd_section, 490 myaddr, memaddr - p->addr, 491 len); 492 else 493 res = bfd_get_section_contents (p->bfd, p->the_bfd_section, 494 myaddr, memaddr - p->addr, 495 len); 496 return (res != 0) ? len : 0; 497 } 498 else if (memaddr >= p->endaddr) 499 { 500 /* This section ends before the transfer starts. */ 501 continue; 502 } 503 else 504 { 505 /* This section overlaps the transfer. Just do half. */ 506 len = p->endaddr - memaddr; 507 if (write) 508 res = bfd_set_section_contents (p->bfd, p->the_bfd_section, 509 myaddr, memaddr - p->addr, 510 len); 511 else 512 res = bfd_get_section_contents (p->bfd, p->the_bfd_section, 513 myaddr, memaddr - p->addr, 514 len); 515 return (res != 0) ? len : 0; 516 } 517 } 518 else 519 nextsectaddr = min (nextsectaddr, p->addr); 520 } 521 522 if (nextsectaddr >= memend) 523 return 0; /* We can't help */ 524 else 525 return -(nextsectaddr - memaddr); /* Next boundary where we can help */ 526} 527 528 529void 530print_section_info (struct target_ops *t, bfd *abfd) 531{ 532 struct section_table *p; 533 /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */ 534 int wid = gdbarch_addr_bit (current_gdbarch) <= 32 ? 8 : 16; 535 536 printf_filtered ("\t`%s', ", bfd_get_filename (abfd)); 537 wrap_here (" "); 538 printf_filtered (_("file type %s.\n"), bfd_get_target (abfd)); 539 if (abfd == exec_bfd) 540 { 541 printf_filtered (_("\tEntry point: ")); 542 deprecated_print_address_numeric (bfd_get_start_address (abfd), 1, gdb_stdout); 543 printf_filtered ("\n"); 544 } 545 for (p = t->to_sections; p < t->to_sections_end; p++) 546 { 547 printf_filtered ("\t%s", hex_string_custom (p->addr, wid)); 548 printf_filtered (" - %s", hex_string_custom (p->endaddr, wid)); 549 550 /* FIXME: A format of "08l" is not wide enough for file offsets 551 larger than 4GB. OTOH, making it "016l" isn't desirable either 552 since most output will then be much wider than necessary. It 553 may make sense to test the size of the file and choose the 554 format string accordingly. */ 555 /* FIXME: i18n: Need to rewrite this sentence. */ 556 if (info_verbose) 557 printf_filtered (" @ %s", 558 hex_string_custom (p->the_bfd_section->filepos, 8)); 559 printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section)); 560 if (p->bfd != abfd) 561 printf_filtered (" in %s", bfd_get_filename (p->bfd)); 562 printf_filtered ("\n"); 563 } 564} 565 566static void 567exec_files_info (struct target_ops *t) 568{ 569 print_section_info (t, exec_bfd); 570 571 if (vmap) 572 { 573 struct vmap *vp; 574 575 printf_unfiltered (_("\tMapping info for file `%s'.\n"), vmap->name); 576 printf_unfiltered ("\t %*s %*s %*s %*s %8.8s %s\n", 577 strlen_paddr (), "tstart", 578 strlen_paddr (), "tend", 579 strlen_paddr (), "dstart", 580 strlen_paddr (), "dend", 581 "section", 582 "file(member)"); 583 584 for (vp = vmap; vp; vp = vp->nxt) 585 printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n", 586 paddr (vp->tstart), 587 paddr (vp->tend), 588 paddr (vp->dstart), 589 paddr (vp->dend), 590 vp->name, 591 *vp->member ? "(" : "", vp->member, 592 *vp->member ? ")" : ""); 593 } 594} 595 596/* msnyder 5/21/99: 597 exec_set_section_offsets sets the offsets of all the sections 598 in the exec objfile. */ 599 600void 601exec_set_section_offsets (bfd_signed_vma text_off, bfd_signed_vma data_off, 602 bfd_signed_vma bss_off) 603{ 604 struct section_table *sect; 605 606 for (sect = exec_ops.to_sections; 607 sect < exec_ops.to_sections_end; 608 sect++) 609 { 610 flagword flags; 611 612 flags = bfd_get_section_flags (exec_bfd, sect->the_bfd_section); 613 614 if (flags & SEC_CODE) 615 { 616 sect->addr += text_off; 617 sect->endaddr += text_off; 618 } 619 else if (flags & (SEC_DATA | SEC_LOAD)) 620 { 621 sect->addr += data_off; 622 sect->endaddr += data_off; 623 } 624 else if (flags & SEC_ALLOC) 625 { 626 sect->addr += bss_off; 627 sect->endaddr += bss_off; 628 } 629 } 630} 631 632static void 633set_section_command (char *args, int from_tty) 634{ 635 struct section_table *p; 636 char *secname; 637 unsigned seclen; 638 unsigned long secaddr; 639 char secprint[100]; 640 long offset; 641 642 if (args == 0) 643 error (_("Must specify section name and its virtual address")); 644 645 /* Parse out section name */ 646 for (secname = args; !isspace (*args); args++); 647 seclen = args - secname; 648 649 /* Parse out new virtual address */ 650 secaddr = parse_and_eval_address (args); 651 652 for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) 653 { 654 if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen) 655 && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') 656 { 657 offset = secaddr - p->addr; 658 p->addr += offset; 659 p->endaddr += offset; 660 if (from_tty) 661 exec_files_info (&exec_ops); 662 return; 663 } 664 } 665 if (seclen >= sizeof (secprint)) 666 seclen = sizeof (secprint) - 1; 667 strncpy (secprint, secname, seclen); 668 secprint[seclen] = '\0'; 669 error (_("Section %s not found"), secprint); 670} 671 672/* If we can find a section in FILENAME with BFD index INDEX, and the 673 user has not assigned an address to it yet (via "set section"), adjust it 674 to ADDRESS. */ 675 676void 677exec_set_section_address (const char *filename, int index, CORE_ADDR address) 678{ 679 struct section_table *p; 680 681 for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) 682 { 683 if (strcmp (filename, p->bfd->filename) == 0 684 && index == p->the_bfd_section->index 685 && p->addr == 0) 686 { 687 p->addr = address; 688 p->endaddr += address; 689 } 690 } 691} 692 693/* If mourn is being called in all the right places, this could be say 694 `gdb internal error' (since generic_mourn calls 695 breakpoint_init_inferior). */ 696 697static int 698ignore (struct bp_target_info *bp_tgt) 699{ 700 return 0; 701} 702 703/* Find mapped memory. */ 704 705extern void 706exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR, 707 unsigned long, 708 int, int, int, 709 void *), 710 void *)) 711{ 712 exec_ops.to_find_memory_regions = func; 713} 714 715static char *exec_make_note_section (bfd *, int *); 716 717/* Fill in the exec file target vector. Very few entries need to be 718 defined. */ 719 720static void 721init_exec_ops (void) 722{ 723 exec_ops.to_shortname = "exec"; 724 exec_ops.to_longname = "Local exec file"; 725 exec_ops.to_doc = "Use an executable file as a target.\n\ 726Specify the filename of the executable file."; 727 exec_ops.to_open = exec_open; 728 exec_ops.to_close = exec_close; 729 exec_ops.to_attach = find_default_attach; 730 exec_ops.deprecated_xfer_memory = xfer_memory; 731 exec_ops.to_files_info = exec_files_info; 732 exec_ops.to_insert_breakpoint = ignore; 733 exec_ops.to_remove_breakpoint = ignore; 734 exec_ops.to_create_inferior = find_default_create_inferior; 735 exec_ops.to_stratum = file_stratum; 736 exec_ops.to_has_memory = 1; 737 exec_ops.to_make_corefile_notes = exec_make_note_section; 738 exec_ops.to_magic = OPS_MAGIC; 739} 740 741void 742_initialize_exec (void) 743{ 744 struct cmd_list_element *c; 745 746 init_exec_ops (); 747 748 if (!dbx_commands) 749 { 750 c = add_cmd ("file", class_files, file_command, _("\ 751Use FILE as program to be debugged.\n\ 752It is read for its symbols, for getting the contents of pure memory,\n\ 753and it is the program executed when you use the `run' command.\n\ 754If FILE cannot be found as specified, your execution directory path\n\ 755($PATH) is searched for a command of that name.\n\ 756No arg means to have no executable file and no symbols."), &cmdlist); 757 set_cmd_completer (c, filename_completer); 758 } 759 760 c = add_cmd ("exec-file", class_files, exec_file_command, _("\ 761Use FILE as program for getting contents of pure memory.\n\ 762If FILE cannot be found as specified, your execution directory path\n\ 763is searched for a command of that name.\n\ 764No arg means have no executable file."), &cmdlist); 765 set_cmd_completer (c, filename_completer); 766 767 add_com ("section", class_files, set_section_command, _("\ 768Change the base address of section SECTION of the exec file to ADDR.\n\ 769This can be used if the exec file does not contain section addresses,\n\ 770(such as in the a.out format), or when the addresses specified in the\n\ 771file itself are wrong. Each section must be changed separately. The\n\ 772``info files'' command lists all the sections and their addresses.")); 773 774 add_setshow_boolean_cmd ("write", class_support, &write_files, _("\ 775Set writing into executable and core files."), _("\ 776Show writing into executable and core files."), NULL, 777 NULL, 778 show_write_files, 779 &setlist, &showlist); 780 781 add_target (&exec_ops); 782} 783 784static char * 785exec_make_note_section (bfd *obfd, int *note_size) 786{ 787 error (_("Can't create a corefile")); 788} 789