| 1 | /* Handle OSF/1 shared libraries for GDB, the GNU Debugger. |
| 2 | Copyright 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | /* FIXME: Most of this code could be merged with solib.c by using |
| 21 | next_link_map_member and xfer_link_map_member in solib.c. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | |
| 25 | #include <sys/types.h> |
| 26 | #include <signal.h> |
| 27 | #include <string.h> |
| 28 | #include <fcntl.h> |
| 29 | |
| 30 | #include "symtab.h" |
| 31 | #include "bfd.h" |
| 32 | #include "symfile.h" |
| 33 | #include "objfiles.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "command.h" |
| 36 | #include "target.h" |
| 37 | #include "frame.h" |
| 38 | #include "regex.h" |
| 39 | #include "inferior.h" |
| 40 | #include "language.h" |
| 41 | |
| 42 | #define MAX_PATH_SIZE 256 /* FIXME: Should be dynamic */ |
| 43 | |
| 44 | /* FIXME: This is a terrible hack for shared library support under OSF/1. |
| 45 | The main problem is that the needed definitions are not contained in |
| 46 | the system header files. |
| 47 | The ldr_* routines described in loader(3) would be the way to go here. |
| 48 | But they do not work for arbitrary target processes (as documented). */ |
| 49 | |
| 50 | #ifndef USE_LDR_ROUTINES |
| 51 | #define RLD_CONTEXT_ADDRESS 0x3ffc0000000 |
| 52 | |
| 53 | typedef struct |
| 54 | { |
| 55 | CORE_ADDR next; |
| 56 | CORE_ADDR previous; |
| 57 | CORE_ADDR unknown; |
| 58 | char *module_name; |
| 59 | CORE_ADDR modinfo_addr; |
| 60 | } ldr_module_info_t; |
| 61 | |
| 62 | typedef struct |
| 63 | { |
| 64 | CORE_ADDR unknown1; |
| 65 | CORE_ADDR unknown2; |
| 66 | CORE_ADDR head; |
| 67 | CORE_ADDR tail; |
| 68 | } ldr_context_t; |
| 69 | |
| 70 | static ldr_context_t ldr_context; |
| 71 | #else |
| 72 | #include <loader.h> |
| 73 | #endif |
| 74 | |
| 75 | /* Define our own link_map structure. |
| 76 | This will help to share code with solib.c. */ |
| 77 | |
| 78 | struct link_map { |
| 79 | CORE_ADDR l_addr; /* address at which object mapped */ |
| 80 | char *l_name; /* full name of loaded object */ |
| 81 | ldr_module_info_t module_info; /* corresponding module info */ |
| 82 | }; |
| 83 | |
| 84 | #define LM_ADDR(so) ((so) -> lm.l_addr) |
| 85 | #define LM_NAME(so) ((so) -> lm.l_name) |
| 86 | |
| 87 | struct so_list { |
| 88 | struct so_list *next; /* next structure in linked list */ |
| 89 | struct link_map lm; /* copy of link map from inferior */ |
| 90 | struct link_map *lmaddr; /* addr in inferior lm was read from */ |
| 91 | CORE_ADDR lmend; /* upper addr bound of mapped object */ |
| 92 | char so_name[MAX_PATH_SIZE]; /* shared object lib name (FIXME) */ |
| 93 | char symbols_loaded; /* flag: symbols read in yet? */ |
| 94 | char from_tty; /* flag: print msgs? */ |
| 95 | struct objfile *objfile; /* objfile for loaded lib */ |
| 96 | struct section_table *sections; |
| 97 | struct section_table *sections_end; |
| 98 | struct section_table *textsection; |
| 99 | bfd *bfd; |
| 100 | }; |
| 101 | |
| 102 | static struct so_list *so_list_head; /* List of known shared objects */ |
| 103 | |
| 104 | extern int |
| 105 | fdmatch PARAMS ((int, int)); /* In libiberty */ |
| 106 | |
| 107 | /* Local function prototypes */ |
| 108 | |
| 109 | static void |
| 110 | sharedlibrary_command PARAMS ((char *, int)); |
| 111 | |
| 112 | static void |
| 113 | info_sharedlibrary_command PARAMS ((char *, int)); |
| 114 | |
| 115 | static int |
| 116 | symbol_add_stub PARAMS ((char *)); |
| 117 | |
| 118 | static struct so_list * |
| 119 | find_solib PARAMS ((struct so_list *)); |
| 120 | |
| 121 | static struct link_map * |
| 122 | first_link_map_member PARAMS ((void)); |
| 123 | |
| 124 | static struct link_map * |
| 125 | next_link_map_member PARAMS ((struct so_list *)); |
| 126 | |
| 127 | static void |
| 128 | xfer_link_map_member PARAMS ((struct so_list *, struct link_map *)); |
| 129 | |
| 130 | static void |
| 131 | solib_map_sections PARAMS ((struct so_list *)); |
| 132 | |
| 133 | void |
| 134 | _initialize_solib PARAMS ((void)); |
| 135 | |
| 136 | /* |
| 137 | |
| 138 | LOCAL FUNCTION |
| 139 | |
| 140 | solib_map_sections -- open bfd and build sections for shared lib |
| 141 | |
| 142 | SYNOPSIS |
| 143 | |
| 144 | static void solib_map_sections (struct so_list *so) |
| 145 | |
| 146 | DESCRIPTION |
| 147 | |
| 148 | Given a pointer to one of the shared objects in our list |
| 149 | of mapped objects, use the recorded name to open a bfd |
| 150 | descriptor for the object, build a section table, and then |
| 151 | relocate all the section addresses by the base address at |
| 152 | which the shared object was mapped. |
| 153 | |
| 154 | FIXMES |
| 155 | |
| 156 | In most (all?) cases the shared object file name recorded in the |
| 157 | dynamic linkage tables will be a fully qualified pathname. For |
| 158 | cases where it isn't, do we really mimic the systems search |
| 159 | mechanism correctly in the below code (particularly the tilde |
| 160 | expansion stuff?). |
| 161 | */ |
| 162 | |
| 163 | static void |
| 164 | solib_map_sections (so) |
| 165 | struct so_list *so; |
| 166 | { |
| 167 | char *filename; |
| 168 | char *scratch_pathname; |
| 169 | int scratch_chan; |
| 170 | struct section_table *p; |
| 171 | struct cleanup *old_chain; |
| 172 | bfd *abfd; |
| 173 | |
| 174 | filename = tilde_expand (so -> so_name); |
| 175 | old_chain = make_cleanup (free, filename); |
| 176 | |
| 177 | scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, |
| 178 | &scratch_pathname); |
| 179 | if (scratch_chan < 0) |
| 180 | { |
| 181 | scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, |
| 182 | O_RDONLY, 0, &scratch_pathname); |
| 183 | } |
| 184 | if (scratch_chan < 0) |
| 185 | { |
| 186 | perror_with_name (filename); |
| 187 | } |
| 188 | /* Leave scratch_pathname allocated. bfd->name will point to it. */ |
| 189 | |
| 190 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); |
| 191 | if (!abfd) |
| 192 | { |
| 193 | close (scratch_chan); |
| 194 | error ("Could not open `%s' as an executable file: %s", |
| 195 | scratch_pathname, bfd_errmsg (bfd_error)); |
| 196 | } |
| 197 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ |
| 198 | so -> bfd = abfd; |
| 199 | abfd -> cacheable = true; |
| 200 | |
| 201 | if (!bfd_check_format (abfd, bfd_object)) |
| 202 | { |
| 203 | error ("\"%s\": not in executable format: %s.", |
| 204 | scratch_pathname, bfd_errmsg (bfd_error)); |
| 205 | } |
| 206 | if (build_section_table (abfd, &so -> sections, &so -> sections_end)) |
| 207 | { |
| 208 | error ("Can't find the file sections in `%s': %s", |
| 209 | bfd_get_filename (exec_bfd), bfd_errmsg (bfd_error)); |
| 210 | } |
| 211 | |
| 212 | for (p = so -> sections; p < so -> sections_end; p++) |
| 213 | { |
| 214 | /* Relocate the section binding addresses as recorded in the shared |
| 215 | object's file by the base address to which the object was actually |
| 216 | mapped. */ |
| 217 | p -> addr += (CORE_ADDR) LM_ADDR (so); |
| 218 | p -> endaddr += (CORE_ADDR) LM_ADDR (so); |
| 219 | so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend); |
| 220 | if (STREQ (p -> sec_ptr -> name, ".text")) |
| 221 | { |
| 222 | so -> textsection = p; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | /* Free the file names, close the file now. */ |
| 227 | do_cleanups (old_chain); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | |
| 232 | LOCAL FUNCTION |
| 233 | |
| 234 | first_link_map_member -- locate first member in dynamic linker's map |
| 235 | |
| 236 | SYNOPSIS |
| 237 | |
| 238 | static struct link_map *first_link_map_member (void) |
| 239 | |
| 240 | DESCRIPTION |
| 241 | |
| 242 | Read in a copy of the first member in the inferior's dynamic |
| 243 | link map from the inferior's dynamic linker structures, and return |
| 244 | a pointer to the copy in our address space. |
| 245 | */ |
| 246 | |
| 247 | static struct link_map * |
| 248 | first_link_map_member () |
| 249 | { |
| 250 | struct link_map *lm = NULL; |
| 251 | static struct link_map first_lm; |
| 252 | |
| 253 | #ifdef USE_LDR_ROUTINES |
| 254 | ldr_module_t mod_id = LDR_NULL_MODULE; |
| 255 | size_t retsize; |
| 256 | |
| 257 | if (ldr_next_module(inferior_pid, &mod_id) != 0 |
| 258 | || mod_id == LDR_NULL_MODULE |
| 259 | || ldr_inq_module(inferior_pid, mod_id, |
| 260 | &first_lm.module_info, sizeof(ldr_module_info_t), |
| 261 | &retsize) != 0) |
| 262 | return lm; |
| 263 | #else |
| 264 | CORE_ADDR ldr_context_addr; |
| 265 | |
| 266 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, |
| 267 | (char *) &ldr_context_addr, |
| 268 | sizeof (CORE_ADDR)) != 0 |
| 269 | || target_read_memory (ldr_context_addr, |
| 270 | (char *) &ldr_context, |
| 271 | sizeof (ldr_context_t)) != 0 |
| 272 | || target_read_memory ((CORE_ADDR) ldr_context.head, |
| 273 | (char *) &first_lm.module_info, |
| 274 | sizeof (ldr_module_info_t)) != 0) |
| 275 | return lm; |
| 276 | #endif |
| 277 | |
| 278 | lm = &first_lm; |
| 279 | |
| 280 | /* The first entry is for the main program and should be skipped. */ |
| 281 | lm->l_name = NULL; |
| 282 | |
| 283 | return lm; |
| 284 | } |
| 285 | |
| 286 | static struct link_map * |
| 287 | next_link_map_member (so_list_ptr) |
| 288 | struct so_list *so_list_ptr; |
| 289 | { |
| 290 | struct link_map *lm = NULL; |
| 291 | static struct link_map next_lm; |
| 292 | #ifdef USE_LDR_ROUTINES |
| 293 | ldr_module_t mod_id = lm->module_info.lmi_modid; |
| 294 | size_t retsize; |
| 295 | |
| 296 | if (ldr_next_module(inferior_pid, &mod_id) != 0 |
| 297 | || mod_id == LDR_NULL_MODULE |
| 298 | || ldr_inq_module(inferior_pid, mod_id, |
| 299 | &next_lm.module_info, sizeof(ldr_module_info_t), |
| 300 | &retsize) != 0) |
| 301 | return lm; |
| 302 | |
| 303 | lm = &next_lm; |
| 304 | lm->l_name = lm->module_info.lmi_name; |
| 305 | #else |
| 306 | CORE_ADDR ldr_context_addr; |
| 307 | |
| 308 | /* Reread context in case ldr_context.tail was updated. */ |
| 309 | |
| 310 | if (target_read_memory ((CORE_ADDR) RLD_CONTEXT_ADDRESS, |
| 311 | (char *) &ldr_context_addr, |
| 312 | sizeof (CORE_ADDR)) != 0 |
| 313 | || target_read_memory (ldr_context_addr, |
| 314 | (char *) &ldr_context, |
| 315 | sizeof (ldr_context_t)) != 0 |
| 316 | || so_list_ptr->lm.module_info.modinfo_addr == ldr_context.tail |
| 317 | || target_read_memory (so_list_ptr->lm.module_info.next, |
| 318 | (char *) &next_lm.module_info, |
| 319 | sizeof (ldr_module_info_t)) != 0) |
| 320 | return lm; |
| 321 | |
| 322 | lm = &next_lm; |
| 323 | lm->l_name = lm->module_info.module_name; |
| 324 | #endif |
| 325 | return lm; |
| 326 | } |
| 327 | |
| 328 | static void |
| 329 | xfer_link_map_member (so_list_ptr, lm) |
| 330 | struct so_list *so_list_ptr; |
| 331 | struct link_map *lm; |
| 332 | { |
| 333 | so_list_ptr->lm = *lm; |
| 334 | |
| 335 | /* OSF/1 has absolute addresses in shared libraries. */ |
| 336 | LM_ADDR (so_list_ptr) = 0; |
| 337 | |
| 338 | /* There is one entry that has no name (for the inferior executable) |
| 339 | since it is not a shared object. */ |
| 340 | if (LM_NAME (so_list_ptr) != 0) |
| 341 | { |
| 342 | |
| 343 | #ifdef USE_LDR_ROUTINES |
| 344 | int len = strlen (LM_NAME (so_list_ptr) + 1); |
| 345 | |
| 346 | if (len > MAX_PATH_SIZE) |
| 347 | len = MAX_PATH_SIZE; |
| 348 | strncpy (so_list_ptr->so_name, LM_NAME (so_list_ptr), MAX_PATH_SIZE); |
| 349 | #else |
| 350 | if (!target_read_string((CORE_ADDR) LM_NAME (so_list_ptr), |
| 351 | so_list_ptr->so_name, MAX_PATH_SIZE - 1)) |
| 352 | error ("xfer_link_map_member: Can't read pathname for load map\n"); |
| 353 | #endif |
| 354 | so_list_ptr->so_name[MAX_PATH_SIZE - 1] = 0; |
| 355 | |
| 356 | solib_map_sections (so_list_ptr); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | /* |
| 361 | |
| 362 | LOCAL FUNCTION |
| 363 | |
| 364 | find_solib -- step through list of shared objects |
| 365 | |
| 366 | SYNOPSIS |
| 367 | |
| 368 | struct so_list *find_solib (struct so_list *so_list_ptr) |
| 369 | |
| 370 | DESCRIPTION |
| 371 | |
| 372 | This module contains the routine which finds the names of any |
| 373 | loaded "images" in the current process. The argument in must be |
| 374 | NULL on the first call, and then the returned value must be passed |
| 375 | in on subsequent calls. This provides the capability to "step" down |
| 376 | the list of loaded objects. On the last object, a NULL value is |
| 377 | returned. |
| 378 | |
| 379 | The arg and return value are "struct link_map" pointers, as defined |
| 380 | in <link.h>. |
| 381 | */ |
| 382 | |
| 383 | static struct so_list * |
| 384 | find_solib (so_list_ptr) |
| 385 | struct so_list *so_list_ptr; /* Last lm or NULL for first one */ |
| 386 | { |
| 387 | struct so_list *so_list_next = NULL; |
| 388 | struct link_map *lm = NULL; |
| 389 | struct so_list *new; |
| 390 | |
| 391 | if (so_list_ptr == NULL) |
| 392 | { |
| 393 | /* We are setting up for a new scan through the loaded images. */ |
| 394 | if ((so_list_next = so_list_head) == NULL) |
| 395 | { |
| 396 | /* Find the first link map list member. */ |
| 397 | lm = first_link_map_member (); |
| 398 | } |
| 399 | } |
| 400 | else |
| 401 | { |
| 402 | /* We have been called before, and are in the process of walking |
| 403 | the shared library list. Advance to the next shared object. */ |
| 404 | lm = next_link_map_member (so_list_ptr); |
| 405 | so_list_next = so_list_ptr -> next; |
| 406 | } |
| 407 | if ((so_list_next == NULL) && (lm != NULL)) |
| 408 | { |
| 409 | /* Get next link map structure from inferior image and build a local |
| 410 | abbreviated load_map structure */ |
| 411 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); |
| 412 | memset ((char *) new, 0, sizeof (struct so_list)); |
| 413 | new -> lmaddr = lm; |
| 414 | /* Add the new node as the next node in the list, or as the root |
| 415 | node if this is the first one. */ |
| 416 | if (so_list_ptr != NULL) |
| 417 | { |
| 418 | so_list_ptr -> next = new; |
| 419 | } |
| 420 | else |
| 421 | { |
| 422 | so_list_head = new; |
| 423 | } |
| 424 | so_list_next = new; |
| 425 | xfer_link_map_member (new, lm); |
| 426 | } |
| 427 | return (so_list_next); |
| 428 | } |
| 429 | |
| 430 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ |
| 431 | |
| 432 | static int |
| 433 | symbol_add_stub (arg) |
| 434 | char *arg; |
| 435 | { |
| 436 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ |
| 437 | |
| 438 | so -> objfile = symbol_file_add (so -> so_name, so -> from_tty, |
| 439 | so -> textsection -> addr, |
| 440 | 0, 0, 0); |
| 441 | return (1); |
| 442 | } |
| 443 | |
| 444 | /* |
| 445 | |
| 446 | GLOBAL FUNCTION |
| 447 | |
| 448 | solib_add -- add a shared library file to the symtab and section list |
| 449 | |
| 450 | SYNOPSIS |
| 451 | |
| 452 | void solib_add (char *arg_string, int from_tty, |
| 453 | struct target_ops *target) |
| 454 | |
| 455 | DESCRIPTION |
| 456 | |
| 457 | */ |
| 458 | |
| 459 | void |
| 460 | solib_add (arg_string, from_tty, target) |
| 461 | char *arg_string; |
| 462 | int from_tty; |
| 463 | struct target_ops *target; |
| 464 | { |
| 465 | register struct so_list *so = NULL; /* link map state variable */ |
| 466 | |
| 467 | /* Last shared library that we read. */ |
| 468 | struct so_list *so_last = NULL; |
| 469 | |
| 470 | char *re_err; |
| 471 | int count; |
| 472 | int old; |
| 473 | |
| 474 | if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) |
| 475 | { |
| 476 | error ("Invalid regexp: %s", re_err); |
| 477 | } |
| 478 | |
| 479 | |
| 480 | /* Add the shared library sections to the section table of the |
| 481 | specified target, if any. We have to do this before reading the |
| 482 | symbol files as symbol_file_add calls reinit_frame_cache and |
| 483 | creating a new frame might access memory in the shared library. */ |
| 484 | if (target) |
| 485 | { |
| 486 | /* Count how many new section_table entries there are. */ |
| 487 | so = NULL; |
| 488 | count = 0; |
| 489 | while ((so = find_solib (so)) != NULL) |
| 490 | { |
| 491 | if (so -> so_name[0]) |
| 492 | { |
| 493 | count += so -> sections_end - so -> sections; |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | if (count) |
| 498 | { |
| 499 | /* Reallocate the target's section table including the new size. */ |
| 500 | if (target -> to_sections) |
| 501 | { |
| 502 | old = target -> to_sections_end - target -> to_sections; |
| 503 | target -> to_sections = (struct section_table *) |
| 504 | xrealloc ((char *)target -> to_sections, |
| 505 | (sizeof (struct section_table)) * (count + old)); |
| 506 | } |
| 507 | else |
| 508 | { |
| 509 | old = 0; |
| 510 | target -> to_sections = (struct section_table *) |
| 511 | xmalloc ((sizeof (struct section_table)) * count); |
| 512 | } |
| 513 | target -> to_sections_end = target -> to_sections + (count + old); |
| 514 | |
| 515 | /* Add these section table entries to the target's table. */ |
| 516 | while ((so = find_solib (so)) != NULL) |
| 517 | { |
| 518 | if (so -> so_name[0]) |
| 519 | { |
| 520 | count = so -> sections_end - so -> sections; |
| 521 | memcpy ((char *) (target -> to_sections + old), |
| 522 | so -> sections, |
| 523 | (sizeof (struct section_table)) * count); |
| 524 | old += count; |
| 525 | } |
| 526 | } |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | /* Now add the symbol files. */ |
| 531 | so = NULL; |
| 532 | while ((so = find_solib (so)) != NULL) |
| 533 | { |
| 534 | if (so -> so_name[0] && re_exec (so -> so_name)) |
| 535 | { |
| 536 | so -> from_tty = from_tty; |
| 537 | if (so -> symbols_loaded) |
| 538 | { |
| 539 | if (from_tty) |
| 540 | { |
| 541 | printf ("Symbols already loaded for %s\n", so -> so_name); |
| 542 | } |
| 543 | } |
| 544 | else if (catch_errors |
| 545 | (symbol_add_stub, (char *) so, |
| 546 | "Error while reading shared library symbols:\n", |
| 547 | RETURN_MASK_ALL)) |
| 548 | { |
| 549 | so_last = so; |
| 550 | so -> symbols_loaded = 1; |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | |
| 558 | LOCAL FUNCTION |
| 559 | |
| 560 | info_sharedlibrary_command -- code for "info sharedlibrary" |
| 561 | |
| 562 | SYNOPSIS |
| 563 | |
| 564 | static void info_sharedlibrary_command () |
| 565 | |
| 566 | DESCRIPTION |
| 567 | |
| 568 | Walk through the shared library list and print information |
| 569 | about each attached library. |
| 570 | */ |
| 571 | |
| 572 | static void |
| 573 | info_sharedlibrary_command (ignore, from_tty) |
| 574 | char *ignore; |
| 575 | int from_tty; |
| 576 | { |
| 577 | register struct so_list *so = NULL; /* link map state variable */ |
| 578 | int header_done = 0; |
| 579 | |
| 580 | if (exec_bfd == NULL) |
| 581 | { |
| 582 | printf ("No exec file.\n"); |
| 583 | return; |
| 584 | } |
| 585 | while ((so = find_solib (so)) != NULL) |
| 586 | { |
| 587 | if (so -> so_name[0]) |
| 588 | { |
| 589 | unsigned long txt_start = 0; |
| 590 | unsigned long txt_end = 0; |
| 591 | |
| 592 | if (!header_done) |
| 593 | { |
| 594 | printf("%-20s%-20s%-12s%s\n", "From", "To", "Syms Read", |
| 595 | "Shared Object Library"); |
| 596 | header_done++; |
| 597 | } |
| 598 | if (so -> textsection) |
| 599 | { |
| 600 | txt_start = (unsigned long) so -> textsection -> addr; |
| 601 | txt_end = (unsigned long) so -> textsection -> endaddr; |
| 602 | } |
| 603 | printf ("%-20s", local_hex_string_custom (txt_start, "08l")); |
| 604 | printf ("%-20s", local_hex_string_custom (txt_end, "08l")); |
| 605 | printf ("%-12s", so -> symbols_loaded ? "Yes" : "No"); |
| 606 | printf ("%s\n", so -> so_name); |
| 607 | } |
| 608 | } |
| 609 | if (so_list_head == NULL) |
| 610 | { |
| 611 | printf ("No shared libraries loaded at this time.\n"); |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | |
| 617 | GLOBAL FUNCTION |
| 618 | |
| 619 | solib_address -- check to see if an address is in a shared lib |
| 620 | |
| 621 | SYNOPSIS |
| 622 | |
| 623 | int solib_address (CORE_ADDR address) |
| 624 | |
| 625 | DESCRIPTION |
| 626 | |
| 627 | Provides a hook for other gdb routines to discover whether or |
| 628 | not a particular address is within the mapped address space of |
| 629 | a shared library. Any address between the base mapping address |
| 630 | and the first address beyond the end of the last mapping, is |
| 631 | considered to be within the shared library address space, for |
| 632 | our purposes. |
| 633 | |
| 634 | For example, this routine is called at one point to disable |
| 635 | breakpoints which are in shared libraries that are not currently |
| 636 | mapped in. |
| 637 | */ |
| 638 | |
| 639 | int |
| 640 | solib_address (address) |
| 641 | CORE_ADDR address; |
| 642 | { |
| 643 | register struct so_list *so = 0; /* link map state variable */ |
| 644 | |
| 645 | while ((so = find_solib (so)) != NULL) |
| 646 | { |
| 647 | if (so -> so_name[0] && so -> textsection) |
| 648 | { |
| 649 | if ((address >= (CORE_ADDR) so -> textsection -> addr) && |
| 650 | (address < (CORE_ADDR) so -> textsection -> endaddr)) |
| 651 | { |
| 652 | return (1); |
| 653 | } |
| 654 | } |
| 655 | } |
| 656 | return (0); |
| 657 | } |
| 658 | |
| 659 | /* Called by free_all_symtabs */ |
| 660 | |
| 661 | void |
| 662 | clear_solib() |
| 663 | { |
| 664 | struct so_list *next; |
| 665 | char *bfd_filename; |
| 666 | |
| 667 | while (so_list_head) |
| 668 | { |
| 669 | if (so_list_head -> sections) |
| 670 | { |
| 671 | free ((PTR)so_list_head -> sections); |
| 672 | } |
| 673 | if (so_list_head -> bfd) |
| 674 | { |
| 675 | bfd_filename = bfd_get_filename (so_list_head -> bfd); |
| 676 | bfd_close (so_list_head -> bfd); |
| 677 | } |
| 678 | else |
| 679 | /* This happens for the executable on SVR4. */ |
| 680 | bfd_filename = NULL; |
| 681 | |
| 682 | next = so_list_head -> next; |
| 683 | if (bfd_filename) |
| 684 | free ((PTR)bfd_filename); |
| 685 | free ((PTR)so_list_head); |
| 686 | so_list_head = next; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | |
| 692 | GLOBAL FUNCTION |
| 693 | |
| 694 | solib_create_inferior_hook -- shared library startup support |
| 695 | |
| 696 | SYNOPSIS |
| 697 | |
| 698 | void solib_create_inferior_hook() |
| 699 | |
| 700 | DESCRIPTION |
| 701 | |
| 702 | When gdb starts up the inferior, it nurses it along (through the |
| 703 | shell) until it is ready to execute it's first instruction. At this |
| 704 | point, this function gets called via expansion of the macro |
| 705 | SOLIB_CREATE_INFERIOR_HOOK. |
| 706 | For a statically bound executable, this first instruction is the |
| 707 | one at "_start", or a similar text label. No further processing is |
| 708 | needed in that case. |
| 709 | For a dynamically bound executable, this first instruction is somewhere |
| 710 | in the rld, and the actual user executable is not yet mapped in. |
| 711 | We continue the inferior again, rld then maps in the actual user |
| 712 | executable and any needed shared libraries and then sends |
| 713 | itself a SIGTRAP. |
| 714 | At that point we discover the names of all shared libraries and |
| 715 | read their symbols in. |
| 716 | |
| 717 | FIXME |
| 718 | |
| 719 | This code does not properly handle hitting breakpoints which the |
| 720 | user might have set in the rld itself. Proper handling would have |
| 721 | to check if the SIGTRAP happened due to a kill call. |
| 722 | |
| 723 | Also, what if child has exit()ed? Must exit loop somehow. |
| 724 | */ |
| 725 | |
| 726 | void |
| 727 | solib_create_inferior_hook() |
| 728 | { |
| 729 | |
| 730 | /* Nothing to do for statically bound executables. */ |
| 731 | |
| 732 | if (symfile_objfile == 0 || symfile_objfile->ei.entry_file_lowpc == stop_pc) |
| 733 | return; |
| 734 | |
| 735 | /* Now run the target. It will eventually get a SIGTRAP, at |
| 736 | which point all of the libraries will have been mapped in and we |
| 737 | can go groveling around in the rld structures to find |
| 738 | out what we need to know about them. */ |
| 739 | |
| 740 | clear_proceed_status (); |
| 741 | stop_soon_quietly = 1; |
| 742 | stop_signal = 0; |
| 743 | do |
| 744 | { |
| 745 | target_resume (inferior_pid, 0, stop_signal); |
| 746 | wait_for_inferior (); |
| 747 | } |
| 748 | while (stop_signal != SIGTRAP); |
| 749 | stop_soon_quietly = 0; |
| 750 | |
| 751 | solib_add ((char *) 0, 0, (struct target_ops *) 0); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | /* |
| 756 | |
| 757 | LOCAL FUNCTION |
| 758 | |
| 759 | sharedlibrary_command -- handle command to explicitly add library |
| 760 | |
| 761 | SYNOPSIS |
| 762 | |
| 763 | static void sharedlibrary_command (char *args, int from_tty) |
| 764 | |
| 765 | DESCRIPTION |
| 766 | |
| 767 | */ |
| 768 | |
| 769 | static void |
| 770 | sharedlibrary_command (args, from_tty) |
| 771 | char *args; |
| 772 | int from_tty; |
| 773 | { |
| 774 | dont_repeat (); |
| 775 | solib_add (args, from_tty, (struct target_ops *) 0); |
| 776 | } |
| 777 | |
| 778 | void |
| 779 | _initialize_solib() |
| 780 | { |
| 781 | |
| 782 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
| 783 | "Load shared object library symbols for files matching REGEXP."); |
| 784 | add_info ("sharedlibrary", info_sharedlibrary_command, |
| 785 | "Status of loaded shared object libraries."); |
| 786 | } |