| 1 | /* Work with executable files, for GDB. |
| 2 | Copyright 1988, 1989, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "frame.h" |
| 22 | #include "inferior.h" |
| 23 | #include "target.h" |
| 24 | #include "gdbcmd.h" |
| 25 | #include "language.h" |
| 26 | #include "symfile.h" |
| 27 | #include "objfiles.h" |
| 28 | |
| 29 | #ifdef USG |
| 30 | #include <sys/types.h> |
| 31 | #endif |
| 32 | |
| 33 | #include <sys/param.h> |
| 34 | #include <fcntl.h> |
| 35 | #include "gdb_string.h" |
| 36 | |
| 37 | #include "gdbcore.h" |
| 38 | |
| 39 | #include <ctype.h> |
| 40 | #include "gdb_stat.h" |
| 41 | #ifndef O_BINARY |
| 42 | #define O_BINARY 0 |
| 43 | #endif |
| 44 | |
| 45 | #include "xcoffsolib.h" |
| 46 | |
| 47 | struct vmap *map_vmap PARAMS ((bfd *, bfd *)); |
| 48 | |
| 49 | /* Prototypes for local functions */ |
| 50 | |
| 51 | static void add_to_section_table PARAMS ((bfd *, sec_ptr, PTR)); |
| 52 | |
| 53 | static void exec_close PARAMS ((int)); |
| 54 | |
| 55 | static void file_command PARAMS ((char *, int)); |
| 56 | |
| 57 | static void set_section_command PARAMS ((char *, int)); |
| 58 | |
| 59 | static void exec_files_info PARAMS ((struct target_ops *)); |
| 60 | |
| 61 | static void bfdsec_to_vmap PARAMS ((bfd *, sec_ptr, PTR)); |
| 62 | |
| 63 | static int ignore PARAMS ((CORE_ADDR, char *)); |
| 64 | |
| 65 | extern int info_verbose; |
| 66 | |
| 67 | /* The Binary File Descriptor handle for the executable file. */ |
| 68 | |
| 69 | bfd *exec_bfd = NULL; |
| 70 | |
| 71 | /* Whether to open exec and core files read-only or read-write. */ |
| 72 | |
| 73 | int write_files = 0; |
| 74 | |
| 75 | /* Text start and end addresses (KLUDGE) if needed */ |
| 76 | |
| 77 | #ifdef NEED_TEXT_START_END |
| 78 | CORE_ADDR text_start = 0; |
| 79 | CORE_ADDR text_end = 0; |
| 80 | #endif |
| 81 | |
| 82 | struct vmap *vmap; |
| 83 | |
| 84 | /* Forward decl */ |
| 85 | |
| 86 | extern struct target_ops exec_ops; |
| 87 | |
| 88 | /* ARGSUSED */ |
| 89 | static void |
| 90 | exec_close (quitting) |
| 91 | int quitting; |
| 92 | { |
| 93 | int need_symtab_cleanup = 0; |
| 94 | struct vmap *vp, *nxt; |
| 95 | |
| 96 | for (nxt = vmap; nxt != NULL; ) |
| 97 | { |
| 98 | vp = nxt; |
| 99 | nxt = vp->nxt; |
| 100 | |
| 101 | /* if there is an objfile associated with this bfd, |
| 102 | free_objfile() will do proper cleanup of objfile *and* bfd. */ |
| 103 | |
| 104 | if (vp->objfile) |
| 105 | { |
| 106 | free_objfile (vp->objfile); |
| 107 | need_symtab_cleanup = 1; |
| 108 | } |
| 109 | else if (vp->bfd != exec_bfd) |
| 110 | /* FIXME-leak: We should be freeing vp->name too, I think. */ |
| 111 | if (!bfd_close (vp->bfd)) |
| 112 | warning ("cannot close \"%s\": %s", |
| 113 | vp->name, bfd_errmsg (bfd_get_error ())); |
| 114 | |
| 115 | /* FIXME: This routine is #if 0'd in symfile.c. What should we |
| 116 | be doing here? Should we just free everything in |
| 117 | vp->objfile->symtabs? Should free_objfile do that? |
| 118 | FIXME-as-well: free_objfile already free'd vp->name, so it isn't |
| 119 | valid here. */ |
| 120 | free_named_symtabs (vp->name); |
| 121 | free (vp); |
| 122 | } |
| 123 | |
| 124 | vmap = NULL; |
| 125 | |
| 126 | if (exec_bfd) |
| 127 | { |
| 128 | char *name = bfd_get_filename (exec_bfd); |
| 129 | |
| 130 | if (!bfd_close (exec_bfd)) |
| 131 | warning ("cannot close \"%s\": %s", |
| 132 | name, bfd_errmsg (bfd_get_error ())); |
| 133 | free (name); |
| 134 | exec_bfd = NULL; |
| 135 | } |
| 136 | |
| 137 | if (exec_ops.to_sections) |
| 138 | { |
| 139 | free ((PTR)exec_ops.to_sections); |
| 140 | exec_ops.to_sections = NULL; |
| 141 | exec_ops.to_sections_end = NULL; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /* Process the first arg in ARGS as the new exec file. |
| 146 | |
| 147 | Note that we have to explicitly ignore additional args, since we can |
| 148 | be called from file_command(), which also calls symbol_file_command() |
| 149 | which can take multiple args. */ |
| 150 | |
| 151 | void |
| 152 | exec_file_command (args, from_tty) |
| 153 | char *args; |
| 154 | int from_tty; |
| 155 | { |
| 156 | char **argv; |
| 157 | char *filename; |
| 158 | |
| 159 | target_preopen (from_tty); |
| 160 | |
| 161 | /* Remove any previous exec file. */ |
| 162 | unpush_target (&exec_ops); |
| 163 | |
| 164 | /* Now open and digest the file the user requested, if any. */ |
| 165 | |
| 166 | if (args) |
| 167 | { |
| 168 | char *scratch_pathname; |
| 169 | int scratch_chan; |
| 170 | |
| 171 | /* Scan through the args and pick up the first non option arg |
| 172 | as the filename. */ |
| 173 | |
| 174 | argv = buildargv (args); |
| 175 | if (argv == NULL) |
| 176 | nomem (0); |
| 177 | |
| 178 | make_cleanup (freeargv, (char *) argv); |
| 179 | |
| 180 | for (; (*argv != NULL) && (**argv == '-'); argv++) {;} |
| 181 | if (*argv == NULL) |
| 182 | error ("no exec file name was specified"); |
| 183 | |
| 184 | filename = tilde_expand (*argv); |
| 185 | make_cleanup (free, filename); |
| 186 | |
| 187 | scratch_chan = openp (getenv ("PATH"), 1, filename, |
| 188 | write_files? O_RDWR|O_BINARY: O_RDONLY|O_BINARY, 0, |
| 189 | &scratch_pathname); |
| 190 | #if defined(__GO32__) || defined(__WIN32__) |
| 191 | if (scratch_chan < 0) |
| 192 | { |
| 193 | char *exename = alloca (strlen (filename) + 5); |
| 194 | strcat (strcpy (exename, filename), ".exe"); |
| 195 | scratch_chan = openp (getenv ("PATH"), 1, exename, write_files ? |
| 196 | O_RDWR|O_BINARY : O_RDONLY|O_BINARY, 0, &scratch_pathname); |
| 197 | } |
| 198 | #endif |
| 199 | if (scratch_chan < 0) |
| 200 | perror_with_name (filename); |
| 201 | exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
| 202 | |
| 203 | if (!exec_bfd) |
| 204 | error ("\"%s\": could not open as an executable file: %s", |
| 205 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 206 | |
| 207 | /* At this point, scratch_pathname and exec_bfd->name both point to the |
| 208 | same malloc'd string. However exec_close() will attempt to free it |
| 209 | via the exec_bfd->name pointer, so we need to make another copy and |
| 210 | leave exec_bfd as the new owner of the original copy. */ |
| 211 | scratch_pathname = strdup (scratch_pathname); |
| 212 | make_cleanup (free, scratch_pathname); |
| 213 | |
| 214 | if (!bfd_check_format (exec_bfd, bfd_object)) |
| 215 | { |
| 216 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 217 | it. */ |
| 218 | exec_close (0); |
| 219 | error ("\"%s\": not in executable format: %s", |
| 220 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 221 | } |
| 222 | |
| 223 | /* FIXME - This should only be run for RS6000, but the ifdef is a poor |
| 224 | way to accomplish. */ |
| 225 | #ifdef IBM6000_TARGET |
| 226 | /* Setup initial vmap. */ |
| 227 | |
| 228 | map_vmap (exec_bfd, 0); |
| 229 | if (vmap == NULL) |
| 230 | { |
| 231 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 232 | it. */ |
| 233 | exec_close (0); |
| 234 | error ("\"%s\": can't find the file sections: %s", |
| 235 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 236 | } |
| 237 | #endif /* IBM6000_TARGET */ |
| 238 | |
| 239 | if (build_section_table (exec_bfd, &exec_ops.to_sections, |
| 240 | &exec_ops.to_sections_end)) |
| 241 | { |
| 242 | /* Make sure to close exec_bfd, or else "run" might try to use |
| 243 | it. */ |
| 244 | exec_close (0); |
| 245 | error ("\"%s\": can't find the file sections: %s", |
| 246 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
| 247 | } |
| 248 | |
| 249 | #ifdef NEED_TEXT_START_END |
| 250 | |
| 251 | /* text_end is sometimes used for where to put call dummies. A |
| 252 | few ports use these for other purposes too. */ |
| 253 | |
| 254 | { |
| 255 | struct section_table *p; |
| 256 | |
| 257 | /* Set text_start to the lowest address of the start of any |
| 258 | readonly code section and set text_end to the highest |
| 259 | address of the end of any readonly code section. */ |
| 260 | /* FIXME: The comment above does not match the code. The code |
| 261 | checks for sections with are either code *or* readonly. */ |
| 262 | |
| 263 | text_start = ~(CORE_ADDR)0; |
| 264 | text_end = (CORE_ADDR)0; |
| 265 | for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) |
| 266 | if (bfd_get_section_flags (p->bfd, p->the_bfd_section) |
| 267 | & (SEC_CODE | SEC_READONLY)) |
| 268 | { |
| 269 | if (text_start > p->addr) |
| 270 | text_start = p->addr; |
| 271 | if (text_end < p->endaddr) |
| 272 | text_end = p->endaddr; |
| 273 | } |
| 274 | } |
| 275 | #endif |
| 276 | |
| 277 | validate_files (); |
| 278 | |
| 279 | set_endian_from_file (exec_bfd); |
| 280 | |
| 281 | push_target (&exec_ops); |
| 282 | |
| 283 | /* Tell display code (if any) about the changed file name. */ |
| 284 | if (exec_file_display_hook) |
| 285 | (*exec_file_display_hook) (filename); |
| 286 | } |
| 287 | else if (from_tty) |
| 288 | printf_unfiltered ("No exec file now.\n"); |
| 289 | } |
| 290 | |
| 291 | /* Set both the exec file and the symbol file, in one command. |
| 292 | What a novelty. Why did GDB go through four major releases before this |
| 293 | command was added? */ |
| 294 | |
| 295 | static void |
| 296 | file_command (arg, from_tty) |
| 297 | char *arg; |
| 298 | int from_tty; |
| 299 | { |
| 300 | /* FIXME, if we lose on reading the symbol file, we should revert |
| 301 | the exec file, but that's rough. */ |
| 302 | exec_file_command (arg, from_tty); |
| 303 | symbol_file_command (arg, from_tty); |
| 304 | } |
| 305 | |
| 306 | \f |
| 307 | /* Locate all mappable sections of a BFD file. |
| 308 | table_pp_char is a char * to get it through bfd_map_over_sections; |
| 309 | we cast it back to its proper type. */ |
| 310 | |
| 311 | static void |
| 312 | add_to_section_table (abfd, asect, table_pp_char) |
| 313 | bfd *abfd; |
| 314 | sec_ptr asect; |
| 315 | PTR table_pp_char; |
| 316 | { |
| 317 | struct section_table **table_pp = (struct section_table **)table_pp_char; |
| 318 | flagword aflag; |
| 319 | |
| 320 | aflag = bfd_get_section_flags (abfd, asect); |
| 321 | if (!(aflag & SEC_ALLOC)) |
| 322 | return; |
| 323 | if (0 == bfd_section_size (abfd, asect)) |
| 324 | return; |
| 325 | (*table_pp)->bfd = abfd; |
| 326 | (*table_pp)->the_bfd_section = asect; |
| 327 | (*table_pp)->addr = bfd_section_vma (abfd, asect); |
| 328 | (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect); |
| 329 | (*table_pp)++; |
| 330 | } |
| 331 | |
| 332 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
| 333 | Returns 0 if OK, 1 on error. */ |
| 334 | |
| 335 | int |
| 336 | build_section_table (some_bfd, start, end) |
| 337 | bfd *some_bfd; |
| 338 | struct section_table **start, **end; |
| 339 | { |
| 340 | unsigned count; |
| 341 | |
| 342 | count = bfd_count_sections (some_bfd); |
| 343 | if (*start) |
| 344 | free ((PTR)*start); |
| 345 | *start = (struct section_table *) xmalloc (count * sizeof (**start)); |
| 346 | *end = *start; |
| 347 | bfd_map_over_sections (some_bfd, add_to_section_table, (char *)end); |
| 348 | if (*end > *start + count) |
| 349 | abort(); |
| 350 | /* We could realloc the table, but it probably loses for most files. */ |
| 351 | return 0; |
| 352 | } |
| 353 | \f |
| 354 | static void |
| 355 | bfdsec_to_vmap(abfd, sect, arg3) |
| 356 | bfd *abfd; |
| 357 | sec_ptr sect; |
| 358 | PTR arg3; |
| 359 | { |
| 360 | struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3; |
| 361 | struct vmap *vp; |
| 362 | |
| 363 | vp = vmap_bfd->pvmap; |
| 364 | |
| 365 | if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0) |
| 366 | return; |
| 367 | |
| 368 | if (STREQ (bfd_section_name (abfd, sect), ".text")) |
| 369 | { |
| 370 | vp->tstart = 0; |
| 371 | vp->tend = vp->tstart + bfd_section_size (abfd, sect); |
| 372 | |
| 373 | /* When it comes to this adjustment value, in contrast to our previous |
| 374 | belief shared objects should behave the same as the main load segment. |
| 375 | This is the offset from the beginning of text section to the first |
| 376 | real instruction. */ |
| 377 | |
| 378 | vp->tadj = sect->filepos - bfd_section_vma (abfd, sect); |
| 379 | } |
| 380 | else if (STREQ (bfd_section_name (abfd, sect), ".data")) |
| 381 | { |
| 382 | vp->dstart = 0; |
| 383 | vp->dend = vp->dstart + bfd_section_size (abfd, sect); |
| 384 | } |
| 385 | /* Silently ignore other types of sections. (FIXME?) */ |
| 386 | } |
| 387 | |
| 388 | /* Make a vmap for ABFD which might be a member of the archive ARCH. |
| 389 | Return the new vmap. */ |
| 390 | |
| 391 | struct vmap * |
| 392 | map_vmap (abfd, arch) |
| 393 | bfd *abfd; |
| 394 | bfd *arch; |
| 395 | { |
| 396 | struct vmap_and_bfd vmap_bfd; |
| 397 | struct vmap *vp, **vpp; |
| 398 | |
| 399 | vp = (struct vmap *) xmalloc (sizeof (*vp)); |
| 400 | memset ((char *) vp, '\0', sizeof (*vp)); |
| 401 | vp->nxt = 0; |
| 402 | vp->bfd = abfd; |
| 403 | vp->name = bfd_get_filename (arch ? arch : abfd); |
| 404 | vp->member = arch ? bfd_get_filename (abfd) : ""; |
| 405 | |
| 406 | vmap_bfd.pbfd = arch; |
| 407 | vmap_bfd.pvmap = vp; |
| 408 | bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd); |
| 409 | |
| 410 | /* Find the end of the list and append. */ |
| 411 | for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt) |
| 412 | ; |
| 413 | *vpp = vp; |
| 414 | |
| 415 | return vp; |
| 416 | } |
| 417 | \f |
| 418 | /* Read or write the exec file. |
| 419 | |
| 420 | Args are address within a BFD file, address within gdb address-space, |
| 421 | length, and a flag indicating whether to read or write. |
| 422 | |
| 423 | Result is a length: |
| 424 | |
| 425 | 0: We cannot handle this address and length. |
| 426 | > 0: We have handled N bytes starting at this address. |
| 427 | (If N == length, we did it all.) We might be able |
| 428 | to handle more bytes beyond this length, but no |
| 429 | promises. |
| 430 | < 0: We cannot handle this address, but if somebody |
| 431 | else handles (-N) bytes, we can start from there. |
| 432 | |
| 433 | The same routine is used to handle both core and exec files; |
| 434 | we just tail-call it with more arguments to select between them. */ |
| 435 | |
| 436 | int |
| 437 | xfer_memory (memaddr, myaddr, len, write, target) |
| 438 | CORE_ADDR memaddr; |
| 439 | char *myaddr; |
| 440 | int len; |
| 441 | int write; |
| 442 | struct target_ops *target; |
| 443 | { |
| 444 | boolean res; |
| 445 | struct section_table *p; |
| 446 | CORE_ADDR nextsectaddr, memend; |
| 447 | boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type)); |
| 448 | |
| 449 | if (len <= 0) |
| 450 | abort(); |
| 451 | |
| 452 | memend = memaddr + len; |
| 453 | xfer_fn = write ? bfd_set_section_contents : bfd_get_section_contents; |
| 454 | nextsectaddr = memend; |
| 455 | |
| 456 | for (p = target->to_sections; p < target->to_sections_end; p++) |
| 457 | { |
| 458 | if (p->addr <= memaddr) |
| 459 | if (p->endaddr >= memend) |
| 460 | { |
| 461 | /* Entire transfer is within this section. */ |
| 462 | res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, |
| 463 | memaddr - p->addr, len); |
| 464 | return (res != 0) ? len : 0; |
| 465 | } |
| 466 | else if (p->endaddr <= memaddr) |
| 467 | { |
| 468 | /* This section ends before the transfer starts. */ |
| 469 | continue; |
| 470 | } |
| 471 | else |
| 472 | { |
| 473 | /* This section overlaps the transfer. Just do half. */ |
| 474 | len = p->endaddr - memaddr; |
| 475 | res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, |
| 476 | memaddr - p->addr, len); |
| 477 | return (res != 0) ? len : 0; |
| 478 | } |
| 479 | else if (p->addr < nextsectaddr) |
| 480 | nextsectaddr = p->addr; |
| 481 | } |
| 482 | |
| 483 | if (nextsectaddr >= memend) |
| 484 | return 0; /* We can't help */ |
| 485 | else |
| 486 | return - (nextsectaddr - memaddr); /* Next boundary where we can help */ |
| 487 | } |
| 488 | |
| 489 | #ifdef FIXME |
| 490 | #ifdef REG_STACK_SEGMENT |
| 491 | /* MOVE TO BFD... */ |
| 492 | /* Pyramids and AM29000s have an extra segment in the virtual address space |
| 493 | for the (control) stack of register-window frames. The AM29000 folk |
| 494 | call it the "register stack" rather than the "memory stack". */ |
| 495 | else if (memaddr >= reg_stack_start && memaddr < reg_stack_end) |
| 496 | { |
| 497 | i = min (len, reg_stack_end - memaddr); |
| 498 | fileptr = memaddr - reg_stack_start + reg_stack_offset; |
| 499 | wanna_xfer = coredata; |
| 500 | } |
| 501 | #endif /* REG_STACK_SEGMENT */ |
| 502 | #endif /* FIXME */ |
| 503 | \f |
| 504 | void |
| 505 | print_section_info (t, abfd) |
| 506 | struct target_ops *t; |
| 507 | bfd *abfd; |
| 508 | { |
| 509 | struct section_table *p; |
| 510 | |
| 511 | printf_filtered ("\t`%s', ", bfd_get_filename(abfd)); |
| 512 | wrap_here (" "); |
| 513 | printf_filtered ("file type %s.\n", bfd_get_target(abfd)); |
| 514 | if (abfd == exec_bfd) |
| 515 | { |
| 516 | printf_filtered ("\tEntry point: "); |
| 517 | print_address_numeric (bfd_get_start_address (abfd), 1, gdb_stdout); |
| 518 | printf_filtered ("\n"); |
| 519 | } |
| 520 | for (p = t->to_sections; p < t->to_sections_end; p++) |
| 521 | { |
| 522 | /* FIXME-32x64 need a print_address_numeric with field width */ |
| 523 | printf_filtered ("\t%s", local_hex_string_custom ((unsigned long) p->addr, "08l")); |
| 524 | printf_filtered (" - %s", local_hex_string_custom ((unsigned long) p->endaddr, "08l")); |
| 525 | if (info_verbose) |
| 526 | printf_filtered (" @ %s", |
| 527 | local_hex_string_custom ((unsigned long) p->the_bfd_section->filepos, "08l")); |
| 528 | printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section)); |
| 529 | if (p->bfd != abfd) |
| 530 | { |
| 531 | printf_filtered (" in %s", bfd_get_filename (p->bfd)); |
| 532 | } |
| 533 | printf_filtered ("\n"); |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | static void |
| 538 | exec_files_info (t) |
| 539 | struct target_ops *t; |
| 540 | { |
| 541 | print_section_info (t, exec_bfd); |
| 542 | |
| 543 | if (vmap) |
| 544 | { |
| 545 | struct vmap *vp; |
| 546 | |
| 547 | printf_unfiltered ("\tMapping info for file `%s'.\n", vmap->name); |
| 548 | printf_unfiltered ("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n", |
| 549 | "tstart", "tend", "dstart", "dend", "section", |
| 550 | "file(member)"); |
| 551 | |
| 552 | for (vp = vmap; vp; vp = vp->nxt) |
| 553 | printf_unfiltered ("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n", |
| 554 | vp->tstart, vp->tend, vp->dstart, vp->dend, vp->name, |
| 555 | *vp->member ? "(" : "", vp->member, |
| 556 | *vp->member ? ")" : ""); |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | static void |
| 561 | set_section_command (args, from_tty) |
| 562 | char *args; |
| 563 | int from_tty; |
| 564 | { |
| 565 | struct section_table *p; |
| 566 | char *secname; |
| 567 | unsigned seclen; |
| 568 | unsigned long secaddr; |
| 569 | char secprint[100]; |
| 570 | long offset; |
| 571 | |
| 572 | if (args == 0) |
| 573 | error ("Must specify section name and its virtual address"); |
| 574 | |
| 575 | /* Parse out section name */ |
| 576 | for (secname = args; !isspace(*args); args++) ; |
| 577 | seclen = args - secname; |
| 578 | |
| 579 | /* Parse out new virtual address */ |
| 580 | secaddr = parse_and_eval_address (args); |
| 581 | |
| 582 | for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) { |
| 583 | if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen) |
| 584 | && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') { |
| 585 | offset = secaddr - p->addr; |
| 586 | p->addr += offset; |
| 587 | p->endaddr += offset; |
| 588 | if (from_tty) |
| 589 | exec_files_info(&exec_ops); |
| 590 | return; |
| 591 | } |
| 592 | } |
| 593 | if (seclen >= sizeof (secprint)) |
| 594 | seclen = sizeof (secprint) - 1; |
| 595 | strncpy (secprint, secname, seclen); |
| 596 | secprint[seclen] = '\0'; |
| 597 | error ("Section %s not found", secprint); |
| 598 | } |
| 599 | |
| 600 | /* If mourn is being called in all the right places, this could be say |
| 601 | `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */ |
| 602 | |
| 603 | static int |
| 604 | ignore (addr, contents) |
| 605 | CORE_ADDR addr; |
| 606 | char *contents; |
| 607 | { |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | struct target_ops exec_ops = { |
| 612 | "exec", /* to_shortname */ |
| 613 | "Local exec file", /* to_longname */ |
| 614 | "Use an executable file as a target.\n\ |
| 615 | Specify the filename of the executable file.", /* to_doc */ |
| 616 | exec_file_command, /* to_open */ |
| 617 | exec_close, /* to_close */ |
| 618 | find_default_attach, /* to_attach */ |
| 619 | 0, /* to_detach */ |
| 620 | 0, /* to_resume */ |
| 621 | 0, /* to_wait */ |
| 622 | 0, /* to_fetch_registers */ |
| 623 | 0, /* to_store_registers */ |
| 624 | 0, /* to_prepare_to_store */ |
| 625 | xfer_memory, /* to_xfer_memory */ |
| 626 | exec_files_info, /* to_files_info */ |
| 627 | ignore, /* to_insert_breakpoint */ |
| 628 | ignore, /* to_remove_breakpoint */ |
| 629 | 0, /* to_terminal_init */ |
| 630 | 0, /* to_terminal_inferior */ |
| 631 | 0, /* to_terminal_ours_for_output */ |
| 632 | 0, /* to_terminal_ours */ |
| 633 | 0, /* to_terminal_info */ |
| 634 | 0, /* to_kill */ |
| 635 | 0, /* to_load */ |
| 636 | 0, /* to_lookup_symbol */ |
| 637 | find_default_create_inferior, /* to_create_inferior */ |
| 638 | 0, /* to_mourn_inferior */ |
| 639 | 0, /* to_can_run */ |
| 640 | 0, /* to_notice_signals */ |
| 641 | 0, /* to_thread_alive */ |
| 642 | 0, /* to_stop */ |
| 643 | file_stratum, /* to_stratum */ |
| 644 | 0, /* to_next */ |
| 645 | 0, /* to_has_all_memory */ |
| 646 | 1, /* to_has_memory */ |
| 647 | 0, /* to_has_stack */ |
| 648 | 0, /* to_has_registers */ |
| 649 | 0, /* to_has_execution */ |
| 650 | 0, /* to_sections */ |
| 651 | 0, /* to_sections_end */ |
| 652 | OPS_MAGIC, /* to_magic */ |
| 653 | }; |
| 654 | |
| 655 | void |
| 656 | _initialize_exec() |
| 657 | { |
| 658 | struct cmd_list_element *c; |
| 659 | |
| 660 | c = add_cmd ("file", class_files, file_command, |
| 661 | "Use FILE as program to be debugged.\n\ |
| 662 | It is read for its symbols, for getting the contents of pure memory,\n\ |
| 663 | and it is the program executed when you use the `run' command.\n\ |
| 664 | If FILE cannot be found as specified, your execution directory path\n\ |
| 665 | ($PATH) is searched for a command of that name.\n\ |
| 666 | No arg means to have no executable file and no symbols.", &cmdlist); |
| 667 | c->completer = filename_completer; |
| 668 | |
| 669 | c = add_cmd ("exec-file", class_files, exec_file_command, |
| 670 | "Use FILE as program for getting contents of pure memory.\n\ |
| 671 | If FILE cannot be found as specified, your execution directory path\n\ |
| 672 | is searched for a command of that name.\n\ |
| 673 | No arg means have no executable file.", &cmdlist); |
| 674 | c->completer = filename_completer; |
| 675 | |
| 676 | add_com ("section", class_files, set_section_command, |
| 677 | "Change the base address of section SECTION of the exec file to ADDR.\n\ |
| 678 | This can be used if the exec file does not contain section addresses,\n\ |
| 679 | (such as in the a.out format), or when the addresses specified in the\n\ |
| 680 | file itself are wrong. Each section must be changed separately. The\n\ |
| 681 | ``info files'' command lists all the sections and their addresses."); |
| 682 | |
| 683 | add_show_from_set |
| 684 | (add_set_cmd ("write", class_support, var_boolean, (char *)&write_files, |
| 685 | "Set writing into executable and core files.", |
| 686 | &setlist), |
| 687 | &showlist); |
| 688 | |
| 689 | add_target (&exec_ops); |
| 690 | } |