| 1 | /* Read HP PA/Risc object files for GDB. |
| 2 | Copyright 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, |
| 3 | 2004 Free Software Foundation, Inc. |
| 4 | Written by Fred Fish at Cygnus Support. |
| 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 2 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, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "bfd.h" |
| 25 | #include <syms.h> |
| 26 | #include "symtab.h" |
| 27 | #include "symfile.h" |
| 28 | #include "objfiles.h" |
| 29 | #include "buildsym.h" |
| 30 | #include "stabsread.h" |
| 31 | #include "gdb-stabs.h" |
| 32 | #include "complaints.h" |
| 33 | #include "gdb_string.h" |
| 34 | #include "demangle.h" |
| 35 | #include "som.h" |
| 36 | #include "libhppa.h" |
| 37 | |
| 38 | #include "solib-som.h" |
| 39 | |
| 40 | /* Prototypes for local functions. */ |
| 41 | static int init_import_symbols (struct objfile *objfile); |
| 42 | |
| 43 | /* FIXME: These should really be in a common header somewhere */ |
| 44 | |
| 45 | extern void hpread_build_psymtabs (struct objfile *, int); |
| 46 | |
| 47 | extern void hpread_symfile_finish (struct objfile *); |
| 48 | |
| 49 | extern void hpread_symfile_init (struct objfile *); |
| 50 | |
| 51 | extern void do_pxdb (bfd *); |
| 52 | |
| 53 | /* |
| 54 | |
| 55 | LOCAL FUNCTION |
| 56 | |
| 57 | som_symtab_read -- read the symbol table of a SOM file |
| 58 | |
| 59 | SYNOPSIS |
| 60 | |
| 61 | void som_symtab_read (bfd *abfd, struct objfile *objfile, |
| 62 | struct section_offsets *section_offsets) |
| 63 | |
| 64 | DESCRIPTION |
| 65 | |
| 66 | Given an open bfd, a base address to relocate symbols to, and a |
| 67 | flag that specifies whether or not this bfd is for an executable |
| 68 | or not (may be shared library for example), add all the global |
| 69 | function and data symbols to the minimal symbol table. |
| 70 | */ |
| 71 | |
| 72 | static void |
| 73 | som_symtab_read (bfd *abfd, struct objfile *objfile, |
| 74 | struct section_offsets *section_offsets) |
| 75 | { |
| 76 | unsigned int number_of_symbols; |
| 77 | int val, dynamic; |
| 78 | char *stringtab; |
| 79 | asection *shlib_info; |
| 80 | struct symbol_dictionary_record *buf, *bufp, *endbufp; |
| 81 | char *symname; |
| 82 | CONST int symsize = sizeof (struct symbol_dictionary_record); |
| 83 | CORE_ADDR text_offset, data_offset; |
| 84 | |
| 85 | |
| 86 | text_offset = ANOFFSET (section_offsets, 0); |
| 87 | data_offset = ANOFFSET (section_offsets, 1); |
| 88 | |
| 89 | number_of_symbols = bfd_get_symcount (abfd); |
| 90 | |
| 91 | /* FIXME (alloca): could be quite large. */ |
| 92 | buf = alloca (symsize * number_of_symbols); |
| 93 | bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); |
| 94 | val = bfd_bread (buf, symsize * number_of_symbols, abfd); |
| 95 | if (val != symsize * number_of_symbols) |
| 96 | error (_("Couldn't read symbol dictionary!")); |
| 97 | |
| 98 | /* FIXME (alloca): could be quite large. */ |
| 99 | stringtab = alloca (obj_som_stringtab_size (abfd)); |
| 100 | bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); |
| 101 | val = bfd_bread (stringtab, obj_som_stringtab_size (abfd), abfd); |
| 102 | if (val != obj_som_stringtab_size (abfd)) |
| 103 | error (_("Can't read in HP string table.")); |
| 104 | |
| 105 | /* We need to determine if objfile is a dynamic executable (so we |
| 106 | can do the right thing for ST_ENTRY vs ST_CODE symbols). |
| 107 | |
| 108 | There's nothing in the header which easily allows us to do |
| 109 | this. |
| 110 | |
| 111 | This code used to rely upon the existence of a $SHLIB_INFO$ |
| 112 | section to make this determination. HP claims that it is |
| 113 | more accurate to check for a nonzero text offset, but they |
| 114 | have not provided any information about why that test is |
| 115 | more accurate. */ |
| 116 | dynamic = (text_offset != 0); |
| 117 | |
| 118 | endbufp = buf + number_of_symbols; |
| 119 | for (bufp = buf; bufp < endbufp; ++bufp) |
| 120 | { |
| 121 | enum minimal_symbol_type ms_type; |
| 122 | |
| 123 | QUIT; |
| 124 | |
| 125 | switch (bufp->symbol_scope) |
| 126 | { |
| 127 | case SS_UNIVERSAL: |
| 128 | case SS_EXTERNAL: |
| 129 | switch (bufp->symbol_type) |
| 130 | { |
| 131 | case ST_SYM_EXT: |
| 132 | case ST_ARG_EXT: |
| 133 | continue; |
| 134 | |
| 135 | case ST_CODE: |
| 136 | case ST_PRI_PROG: |
| 137 | case ST_SEC_PROG: |
| 138 | case ST_MILLICODE: |
| 139 | symname = bufp->name.n_strx + stringtab; |
| 140 | ms_type = mst_text; |
| 141 | bufp->symbol_value += text_offset; |
| 142 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 143 | break; |
| 144 | |
| 145 | case ST_ENTRY: |
| 146 | symname = bufp->name.n_strx + stringtab; |
| 147 | /* For a dynamic executable, ST_ENTRY symbols are |
| 148 | the stubs, while the ST_CODE symbol is the real |
| 149 | function. */ |
| 150 | if (dynamic) |
| 151 | ms_type = mst_solib_trampoline; |
| 152 | else |
| 153 | ms_type = mst_text; |
| 154 | bufp->symbol_value += text_offset; |
| 155 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 156 | break; |
| 157 | |
| 158 | case ST_STUB: |
| 159 | symname = bufp->name.n_strx + stringtab; |
| 160 | ms_type = mst_solib_trampoline; |
| 161 | bufp->symbol_value += text_offset; |
| 162 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 163 | break; |
| 164 | |
| 165 | case ST_DATA: |
| 166 | symname = bufp->name.n_strx + stringtab; |
| 167 | bufp->symbol_value += data_offset; |
| 168 | ms_type = mst_data; |
| 169 | break; |
| 170 | default: |
| 171 | continue; |
| 172 | } |
| 173 | break; |
| 174 | |
| 175 | #if 0 |
| 176 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ |
| 177 | case SS_GLOBAL: |
| 178 | #endif |
| 179 | case SS_LOCAL: |
| 180 | switch (bufp->symbol_type) |
| 181 | { |
| 182 | case ST_SYM_EXT: |
| 183 | case ST_ARG_EXT: |
| 184 | continue; |
| 185 | |
| 186 | case ST_CODE: |
| 187 | symname = bufp->name.n_strx + stringtab; |
| 188 | ms_type = mst_file_text; |
| 189 | bufp->symbol_value += text_offset; |
| 190 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 191 | |
| 192 | check_strange_names: |
| 193 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local |
| 194 | label prefixes for stabs, constant data, etc. So we need |
| 195 | only filter out L$ symbols which are left in due to |
| 196 | limitations in how GAS generates SOM relocations. |
| 197 | |
| 198 | When linking in the HPUX C-library the HP linker has |
| 199 | the nasty habit of placing section symbols from the literal |
| 200 | subspaces in the middle of the program's text. Filter |
| 201 | those out as best we can. Check for first and last character |
| 202 | being '$'. |
| 203 | |
| 204 | And finally, the newer HP compilers emit crud like $PIC_foo$N |
| 205 | in some circumstance (PIC code I guess). It's also claimed |
| 206 | that they emit D$ symbols too. What stupidity. */ |
| 207 | if ((symname[0] == 'L' && symname[1] == '$') |
| 208 | || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
| 209 | || (symname[0] == 'D' && symname[1] == '$') |
| 210 | || (strncmp (symname, "L0\001", 3) == 0) |
| 211 | || (strncmp (symname, "$PIC", 4) == 0)) |
| 212 | continue; |
| 213 | break; |
| 214 | |
| 215 | case ST_PRI_PROG: |
| 216 | case ST_SEC_PROG: |
| 217 | case ST_MILLICODE: |
| 218 | symname = bufp->name.n_strx + stringtab; |
| 219 | ms_type = mst_file_text; |
| 220 | bufp->symbol_value += text_offset; |
| 221 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 222 | break; |
| 223 | |
| 224 | case ST_ENTRY: |
| 225 | symname = bufp->name.n_strx + stringtab; |
| 226 | /* SS_LOCAL symbols in a shared library do not have |
| 227 | export stubs, so we do not have to worry about |
| 228 | using mst_file_text vs mst_solib_trampoline here like |
| 229 | we do for SS_UNIVERSAL and SS_EXTERNAL symbols above. */ |
| 230 | ms_type = mst_file_text; |
| 231 | bufp->symbol_value += text_offset; |
| 232 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 233 | break; |
| 234 | |
| 235 | case ST_STUB: |
| 236 | symname = bufp->name.n_strx + stringtab; |
| 237 | ms_type = mst_solib_trampoline; |
| 238 | bufp->symbol_value += text_offset; |
| 239 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
| 240 | break; |
| 241 | |
| 242 | |
| 243 | case ST_DATA: |
| 244 | symname = bufp->name.n_strx + stringtab; |
| 245 | bufp->symbol_value += data_offset; |
| 246 | ms_type = mst_file_data; |
| 247 | goto check_strange_names; |
| 248 | |
| 249 | default: |
| 250 | continue; |
| 251 | } |
| 252 | break; |
| 253 | |
| 254 | /* This can happen for common symbols when -E is passed to the |
| 255 | final link. No idea _why_ that would make the linker force |
| 256 | common symbols to have an SS_UNSAT scope, but it does. |
| 257 | |
| 258 | This also happens for weak symbols, but their type is |
| 259 | ST_DATA. */ |
| 260 | case SS_UNSAT: |
| 261 | switch (bufp->symbol_type) |
| 262 | { |
| 263 | case ST_STORAGE: |
| 264 | case ST_DATA: |
| 265 | symname = bufp->name.n_strx + stringtab; |
| 266 | bufp->symbol_value += data_offset; |
| 267 | ms_type = mst_data; |
| 268 | break; |
| 269 | |
| 270 | default: |
| 271 | continue; |
| 272 | } |
| 273 | break; |
| 274 | |
| 275 | default: |
| 276 | continue; |
| 277 | } |
| 278 | |
| 279 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) |
| 280 | error (_("Invalid symbol data; bad HP string table offset: %d"), |
| 281 | bufp->name.n_strx); |
| 282 | |
| 283 | prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
| 284 | objfile); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | /* Scan and build partial symbols for a symbol file. |
| 289 | We have been initialized by a call to som_symfile_init, which |
| 290 | currently does nothing. |
| 291 | |
| 292 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols |
| 293 | in each section. This is ignored, as it isn't needed for SOM. |
| 294 | |
| 295 | MAINLINE is true if we are reading the main symbol |
| 296 | table (as opposed to a shared lib or dynamically loaded file). |
| 297 | |
| 298 | This function only does the minimum work necessary for letting the |
| 299 | user "name" things symbolically; it does not read the entire symtab. |
| 300 | Instead, it reads the external and static symbols and puts them in partial |
| 301 | symbol tables. When more extensive information is requested of a |
| 302 | file, the corresponding partial symbol table is mutated into a full |
| 303 | fledged symbol table by going back and reading the symbols |
| 304 | for real. |
| 305 | |
| 306 | We look for sections with specific names, to tell us what debug |
| 307 | format to look for: FIXME!!! |
| 308 | |
| 309 | somstab_build_psymtabs() handles STABS symbols. |
| 310 | |
| 311 | Note that SOM files have a "minimal" symbol table, which is vaguely |
| 312 | reminiscent of a COFF symbol table, but has only the minimal information |
| 313 | necessary for linking. We process this also, and use the information to |
| 314 | build gdb's minimal symbol table. This gives us some minimal debugging |
| 315 | capability even for files compiled without -g. */ |
| 316 | |
| 317 | static void |
| 318 | som_symfile_read (struct objfile *objfile, int mainline) |
| 319 | { |
| 320 | bfd *abfd = objfile->obfd; |
| 321 | struct cleanup *back_to; |
| 322 | |
| 323 | do_pxdb (symfile_bfd_open (objfile->name)); |
| 324 | |
| 325 | init_minimal_symbol_collection (); |
| 326 | back_to = make_cleanup_discard_minimal_symbols (); |
| 327 | |
| 328 | /* Read in the import list and the export list. Currently |
| 329 | the export list isn't used; the import list is used in |
| 330 | hp-symtab-read.c to handle static vars declared in other |
| 331 | shared libraries. */ |
| 332 | init_import_symbols (objfile); |
| 333 | #if 0 /* Export symbols not used today 1997-08-05 */ |
| 334 | init_export_symbols (objfile); |
| 335 | #else |
| 336 | objfile->export_list = NULL; |
| 337 | objfile->export_list_size = 0; |
| 338 | #endif |
| 339 | |
| 340 | /* Process the normal SOM symbol table first. |
| 341 | This reads in the DNTT and string table, but doesn't |
| 342 | actually scan the DNTT. It does scan the linker symbol |
| 343 | table and thus build up a "minimal symbol table". */ |
| 344 | |
| 345 | som_symtab_read (abfd, objfile, objfile->section_offsets); |
| 346 | |
| 347 | /* Install any minimal symbols that have been collected as the current |
| 348 | minimal symbols for this objfile. |
| 349 | Further symbol-reading is done incrementally, file-by-file, |
| 350 | in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c |
| 351 | contains the code to do the actual DNTT scanning and symtab building. */ |
| 352 | install_minimal_symbols (objfile); |
| 353 | do_cleanups (back_to); |
| 354 | |
| 355 | /* Now read information from the stabs debug sections. |
| 356 | This is a no-op for SOM. |
| 357 | Perhaps it is intended for some kind of mixed STABS/SOM |
| 358 | situation? */ |
| 359 | stabsect_build_psymtabs (objfile, mainline, |
| 360 | "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
| 361 | |
| 362 | /* Now read the native debug information. |
| 363 | This builds the psymtab. This used to be done via a scan of |
| 364 | the DNTT, but is now done via the PXDB-built quick-lookup tables |
| 365 | together with a scan of the GNTT. See hp-psymtab-read.c. */ |
| 366 | hpread_build_psymtabs (objfile, mainline); |
| 367 | |
| 368 | /* Force hppa-tdep.c to re-read the unwind descriptors. */ |
| 369 | objfile->deprecated_obj_private = NULL; |
| 370 | } |
| 371 | |
| 372 | /* Initialize anything that needs initializing when a completely new symbol |
| 373 | file is specified (not just adding some symbols from another file, e.g. a |
| 374 | shared library). |
| 375 | |
| 376 | We reinitialize buildsym, since we may be reading stabs from a SOM file. */ |
| 377 | |
| 378 | static void |
| 379 | som_new_init (struct objfile *ignore) |
| 380 | { |
| 381 | stabsread_new_init (); |
| 382 | buildsym_new_init (); |
| 383 | } |
| 384 | |
| 385 | /* Perform any local cleanups required when we are done with a particular |
| 386 | objfile. I.E, we are in the process of discarding all symbol information |
| 387 | for an objfile, freeing up all memory held for it, and unlinking the |
| 388 | objfile struct from the global list of known objfiles. */ |
| 389 | |
| 390 | static void |
| 391 | som_symfile_finish (struct objfile *objfile) |
| 392 | { |
| 393 | if (objfile->deprecated_sym_stab_info != NULL) |
| 394 | { |
| 395 | xfree (objfile->deprecated_sym_stab_info); |
| 396 | } |
| 397 | hpread_symfile_finish (objfile); |
| 398 | } |
| 399 | |
| 400 | /* SOM specific initialization routine for reading symbols. */ |
| 401 | |
| 402 | static void |
| 403 | som_symfile_init (struct objfile *objfile) |
| 404 | { |
| 405 | /* SOM objects may be reordered, so set OBJF_REORDERED. If we |
| 406 | find this causes a significant slowdown in gdb then we could |
| 407 | set it in the debug symbol readers only when necessary. */ |
| 408 | objfile->flags |= OBJF_REORDERED; |
| 409 | hpread_symfile_init (objfile); |
| 410 | } |
| 411 | |
| 412 | /* SOM specific parsing routine for section offsets. |
| 413 | |
| 414 | Plain and simple for now. */ |
| 415 | |
| 416 | static void |
| 417 | som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
| 418 | { |
| 419 | int i; |
| 420 | CORE_ADDR text_addr; |
| 421 | |
| 422 | objfile->num_sections = bfd_count_sections (objfile->obfd); |
| 423 | objfile->section_offsets = (struct section_offsets *) |
| 424 | obstack_alloc (&objfile->objfile_obstack, |
| 425 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| 426 | |
| 427 | /* FIXME: ezannoni 2000-04-20 The section names in SOM are not |
| 428 | .text, .data, etc, but $TEXT$, $DATA$,... We should initialize |
| 429 | SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't |
| 430 | know the correspondence between SOM sections and GDB's idea of |
| 431 | section names. So for now we default to what is was before these |
| 432 | changes.*/ |
| 433 | objfile->sect_index_text = 0; |
| 434 | objfile->sect_index_data = 1; |
| 435 | objfile->sect_index_bss = 2; |
| 436 | objfile->sect_index_rodata = 3; |
| 437 | |
| 438 | /* First see if we're a shared library. If so, get the section |
| 439 | offsets from the library, else get them from addrs. */ |
| 440 | if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
| 441 | { |
| 442 | /* Note: Here is OK to compare with ".text" because this is the |
| 443 | name that gdb itself gives to that section, not the SOM |
| 444 | name. */ |
| 445 | for (i = 0; i < objfile->num_sections && addrs->other[i].name; i++) |
| 446 | if (strcmp (addrs->other[i].name, ".text") == 0) |
| 447 | break; |
| 448 | text_addr = addrs->other[i].addr; |
| 449 | |
| 450 | for (i = 0; i < objfile->num_sections; i++) |
| 451 | (objfile->section_offsets)->offsets[i] = text_addr; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | /* Read in and initialize the SOM import list which is present |
| 456 | for all executables and shared libraries. The import list |
| 457 | consists of the symbols that are referenced in OBJFILE but |
| 458 | not defined there. (Variables that are imported are dealt |
| 459 | with as "loc_indirect" vars.) |
| 460 | Return value = number of import symbols read in. */ |
| 461 | static int |
| 462 | init_import_symbols (struct objfile *objfile) |
| 463 | { |
| 464 | unsigned int import_list; |
| 465 | unsigned int import_list_size; |
| 466 | unsigned int string_table; |
| 467 | unsigned int string_table_size; |
| 468 | char *string_buffer; |
| 469 | int i; |
| 470 | int j; |
| 471 | int k; |
| 472 | asection *text_section; /* section handle */ |
| 473 | unsigned int dl_header[12]; /* SOM executable header */ |
| 474 | |
| 475 | /* A struct for an entry in the SOM import list */ |
| 476 | typedef struct |
| 477 | { |
| 478 | int name; /* index into the string table */ |
| 479 | short dont_care1; /* we don't use this */ |
| 480 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ |
| 481 | unsigned int reserved2:8; /* not used */ |
| 482 | } |
| 483 | SomImportEntry; |
| 484 | |
| 485 | /* We read 100 entries in at a time from the disk file. */ |
| 486 | #define SOM_READ_IMPORTS_NUM 100 |
| 487 | #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) |
| 488 | SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
| 489 | |
| 490 | /* Initialize in case we error out */ |
| 491 | objfile->import_list = NULL; |
| 492 | objfile->import_list_size = 0; |
| 493 | |
| 494 | /* It doesn't work, for some reason, to read in space $TEXT$; |
| 495 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
| 496 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
| 497 | if (!text_section) |
| 498 | return 0; |
| 499 | /* Get the SOM executable header */ |
| 500 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
| 501 | |
| 502 | /* Check header version number for 10.x HP-UX */ |
| 503 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. |
| 504 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
| 505 | if (dl_header[0] != 93092112) |
| 506 | return 0; |
| 507 | |
| 508 | import_list = dl_header[4]; |
| 509 | import_list_size = dl_header[5]; |
| 510 | if (!import_list_size) |
| 511 | return 0; |
| 512 | string_table = dl_header[10]; |
| 513 | string_table_size = dl_header[11]; |
| 514 | if (!string_table_size) |
| 515 | return 0; |
| 516 | |
| 517 | /* Suck in SOM string table */ |
| 518 | string_buffer = (char *) xmalloc (string_table_size); |
| 519 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, |
| 520 | string_table, string_table_size); |
| 521 | |
| 522 | /* Allocate import list in the psymbol obstack; this has nothing |
| 523 | to do with psymbols, just a matter of convenience. We want the |
| 524 | import list to be freed when the objfile is deallocated */ |
| 525 | objfile->import_list |
| 526 | = (ImportEntry *) obstack_alloc (&objfile->objfile_obstack, |
| 527 | import_list_size * sizeof (ImportEntry)); |
| 528 | |
| 529 | /* Read in the import entries, a bunch at a time */ |
| 530 | for (j = 0, k = 0; |
| 531 | j < (import_list_size / SOM_READ_IMPORTS_NUM); |
| 532 | j++) |
| 533 | { |
| 534 | bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| 535 | import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
| 536 | SOM_READ_IMPORTS_CHUNK_SIZE); |
| 537 | for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) |
| 538 | { |
| 539 | if (buffer[i].type != (unsigned char) 0) |
| 540 | { |
| 541 | objfile->import_list[k] |
| 542 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| 543 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); |
| 544 | /* Some day we might want to record the type and other information too */ |
| 545 | } |
| 546 | else /* null type */ |
| 547 | objfile->import_list[k] = NULL; |
| 548 | |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | /* Get the leftovers */ |
| 553 | if (k < import_list_size) |
| 554 | bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| 555 | import_list + k * sizeof (SomImportEntry), |
| 556 | (import_list_size - k) * sizeof (SomImportEntry)); |
| 557 | for (i = 0; k < import_list_size; i++, k++) |
| 558 | { |
| 559 | if (buffer[i].type != (unsigned char) 0) |
| 560 | { |
| 561 | objfile->import_list[k] |
| 562 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| 563 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); |
| 564 | /* Some day we might want to record the type and other information too */ |
| 565 | } |
| 566 | else |
| 567 | objfile->import_list[k] = NULL; |
| 568 | } |
| 569 | |
| 570 | objfile->import_list_size = import_list_size; |
| 571 | xfree (string_buffer); |
| 572 | return import_list_size; |
| 573 | } |
| 574 | |
| 575 | /* Read in and initialize the SOM export list which is present |
| 576 | for all executables and shared libraries. The import list |
| 577 | consists of the symbols that are referenced in OBJFILE but |
| 578 | not defined there. (Variables that are imported are dealt |
| 579 | with as "loc_indirect" vars.) |
| 580 | Return value = number of import symbols read in. */ |
| 581 | int |
| 582 | init_export_symbols (struct objfile *objfile) |
| 583 | { |
| 584 | unsigned int export_list; |
| 585 | unsigned int export_list_size; |
| 586 | unsigned int string_table; |
| 587 | unsigned int string_table_size; |
| 588 | char *string_buffer; |
| 589 | int i; |
| 590 | int j; |
| 591 | int k; |
| 592 | asection *text_section; /* section handle */ |
| 593 | unsigned int dl_header[12]; /* SOM executable header */ |
| 594 | |
| 595 | /* A struct for an entry in the SOM export list */ |
| 596 | typedef struct |
| 597 | { |
| 598 | int next; /* for hash table use -- we don't use this */ |
| 599 | int name; /* index into string table */ |
| 600 | int value; /* offset or plabel */ |
| 601 | int dont_care1; /* not used */ |
| 602 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ |
| 603 | char dont_care2; /* not used */ |
| 604 | short dont_care3; /* not used */ |
| 605 | } |
| 606 | SomExportEntry; |
| 607 | |
| 608 | /* We read 100 entries in at a time from the disk file. */ |
| 609 | #define SOM_READ_EXPORTS_NUM 100 |
| 610 | #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) |
| 611 | SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
| 612 | |
| 613 | /* Initialize in case we error out */ |
| 614 | objfile->export_list = NULL; |
| 615 | objfile->export_list_size = 0; |
| 616 | |
| 617 | /* It doesn't work, for some reason, to read in space $TEXT$; |
| 618 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
| 619 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
| 620 | if (!text_section) |
| 621 | return 0; |
| 622 | /* Get the SOM executable header */ |
| 623 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
| 624 | |
| 625 | /* Check header version number for 10.x HP-UX */ |
| 626 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. |
| 627 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
| 628 | if (dl_header[0] != 93092112) |
| 629 | return 0; |
| 630 | |
| 631 | export_list = dl_header[8]; |
| 632 | export_list_size = dl_header[9]; |
| 633 | if (!export_list_size) |
| 634 | return 0; |
| 635 | string_table = dl_header[10]; |
| 636 | string_table_size = dl_header[11]; |
| 637 | if (!string_table_size) |
| 638 | return 0; |
| 639 | |
| 640 | /* Suck in SOM string table */ |
| 641 | string_buffer = (char *) xmalloc (string_table_size); |
| 642 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, |
| 643 | string_table, string_table_size); |
| 644 | |
| 645 | /* Allocate export list in the psymbol obstack; this has nothing |
| 646 | to do with psymbols, just a matter of convenience. We want the |
| 647 | export list to be freed when the objfile is deallocated */ |
| 648 | objfile->export_list |
| 649 | = (ExportEntry *) obstack_alloc (&objfile->objfile_obstack, |
| 650 | export_list_size * sizeof (ExportEntry)); |
| 651 | |
| 652 | /* Read in the export entries, a bunch at a time */ |
| 653 | for (j = 0, k = 0; |
| 654 | j < (export_list_size / SOM_READ_EXPORTS_NUM); |
| 655 | j++) |
| 656 | { |
| 657 | bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| 658 | export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
| 659 | SOM_READ_EXPORTS_CHUNK_SIZE); |
| 660 | for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) |
| 661 | { |
| 662 | if (buffer[i].type != (unsigned char) 0) |
| 663 | { |
| 664 | objfile->export_list[k].name |
| 665 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| 666 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); |
| 667 | objfile->export_list[k].address = buffer[i].value; |
| 668 | /* Some day we might want to record the type and other information too */ |
| 669 | } |
| 670 | else |
| 671 | /* null type */ |
| 672 | { |
| 673 | objfile->export_list[k].name = NULL; |
| 674 | objfile->export_list[k].address = 0; |
| 675 | } |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | /* Get the leftovers */ |
| 680 | if (k < export_list_size) |
| 681 | bfd_get_section_contents (objfile->obfd, text_section, buffer, |
| 682 | export_list + k * sizeof (SomExportEntry), |
| 683 | (export_list_size - k) * sizeof (SomExportEntry)); |
| 684 | for (i = 0; k < export_list_size; i++, k++) |
| 685 | { |
| 686 | if (buffer[i].type != (unsigned char) 0) |
| 687 | { |
| 688 | objfile->export_list[k].name |
| 689 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
| 690 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); |
| 691 | /* Some day we might want to record the type and other information too */ |
| 692 | objfile->export_list[k].address = buffer[i].value; |
| 693 | } |
| 694 | else |
| 695 | { |
| 696 | objfile->export_list[k].name = NULL; |
| 697 | objfile->export_list[k].address = 0; |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | objfile->export_list_size = export_list_size; |
| 702 | xfree (string_buffer); |
| 703 | return export_list_size; |
| 704 | } |
| 705 | \f |
| 706 | |
| 707 | |
| 708 | /* Register that we are able to handle SOM object file formats. */ |
| 709 | |
| 710 | static struct sym_fns som_sym_fns = |
| 711 | { |
| 712 | bfd_target_som_flavour, |
| 713 | som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| 714 | som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| 715 | som_symfile_read, /* sym_read: read a symbol file into symtab */ |
| 716 | som_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| 717 | som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ |
| 718 | NULL /* next: pointer to next struct sym_fns */ |
| 719 | }; |
| 720 | |
| 721 | void |
| 722 | _initialize_somread (void) |
| 723 | { |
| 724 | add_symtab_fns (&som_sym_fns); |
| 725 | } |