Commit | Line | Data |
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c906108c | 1 | /* Read HP PA/Risc object files for GDB. |
cce74817 | 2 | Copyright 1991, 1992, 1996, 1999 Free Software Foundation, Inc. |
c906108c SS |
3 | Written by Fred Fish at Cygnus Support. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "bfd.h" | |
24 | #include <syms.h> | |
25 | #include "symtab.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "buildsym.h" | |
29 | #include "stabsread.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "complaints.h" | |
32 | #include "gdb_string.h" | |
33 | #include "demangle.h" | |
34 | #include "som.h" | |
35 | #include "libhppa.h" | |
36 | ||
37 | /* Various things we might complain about... */ | |
38 | ||
a14ed312 | 39 | static void som_symfile_init (struct objfile *); |
c906108c | 40 | |
a14ed312 | 41 | static void som_new_init (struct objfile *); |
c906108c | 42 | |
a14ed312 | 43 | static void som_symfile_read (struct objfile *, int); |
c906108c | 44 | |
a14ed312 | 45 | static void som_symfile_finish (struct objfile *); |
c906108c SS |
46 | |
47 | static void | |
a14ed312 | 48 | som_symtab_read (bfd *, struct objfile *, struct section_offsets *); |
c906108c | 49 | |
d4f3574e | 50 | static void |
a14ed312 | 51 | som_symfile_offsets (struct objfile *, struct section_addr_info *); |
c906108c SS |
52 | |
53 | /* FIXME: These should really be in a common header somewhere */ | |
54 | ||
a14ed312 | 55 | extern void hpread_build_psymtabs (struct objfile *, int); |
c906108c | 56 | |
a14ed312 | 57 | extern void hpread_symfile_finish (struct objfile *); |
c906108c | 58 | |
a14ed312 | 59 | extern void hpread_symfile_init (struct objfile *); |
c906108c | 60 | |
a14ed312 | 61 | extern void do_pxdb (bfd *); |
c906108c SS |
62 | |
63 | /* | |
64 | ||
c5aa993b | 65 | LOCAL FUNCTION |
c906108c | 66 | |
c5aa993b | 67 | som_symtab_read -- read the symbol table of a SOM file |
c906108c | 68 | |
c5aa993b | 69 | SYNOPSIS |
c906108c | 70 | |
c5aa993b JM |
71 | void som_symtab_read (bfd *abfd, struct objfile *objfile, |
72 | struct section_offsets *section_offsets) | |
c906108c | 73 | |
c5aa993b | 74 | DESCRIPTION |
c906108c | 75 | |
c5aa993b JM |
76 | Given an open bfd, a base address to relocate symbols to, and a |
77 | flag that specifies whether or not this bfd is for an executable | |
78 | or not (may be shared library for example), add all the global | |
79 | function and data symbols to the minimal symbol table. | |
80 | */ | |
c906108c SS |
81 | |
82 | static void | |
83 | som_symtab_read (abfd, objfile, section_offsets) | |
84 | bfd *abfd; | |
85 | struct objfile *objfile; | |
86 | struct section_offsets *section_offsets; | |
87 | { | |
88 | unsigned int number_of_symbols; | |
89 | int val, dynamic; | |
90 | char *stringtab; | |
91 | asection *shlib_info; | |
92 | struct symbol_dictionary_record *buf, *bufp, *endbufp; | |
93 | char *symname; | |
94 | CONST int symsize = sizeof (struct symbol_dictionary_record); | |
95 | CORE_ADDR text_offset, data_offset; | |
96 | ||
97 | ||
98 | text_offset = ANOFFSET (section_offsets, 0); | |
99 | data_offset = ANOFFSET (section_offsets, 1); | |
100 | ||
101 | number_of_symbols = bfd_get_symcount (abfd); | |
102 | ||
103 | buf = alloca (symsize * number_of_symbols); | |
104 | bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); | |
105 | val = bfd_read (buf, symsize * number_of_symbols, 1, abfd); | |
106 | if (val != symsize * number_of_symbols) | |
107 | error ("Couldn't read symbol dictionary!"); | |
108 | ||
109 | stringtab = alloca (obj_som_stringtab_size (abfd)); | |
110 | bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); | |
111 | val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd); | |
112 | if (val != obj_som_stringtab_size (abfd)) | |
113 | error ("Can't read in HP string table."); | |
114 | ||
115 | /* We need to determine if objfile is a dynamic executable (so we | |
116 | can do the right thing for ST_ENTRY vs ST_CODE symbols). | |
117 | ||
118 | There's nothing in the header which easily allows us to do | |
119 | this. The only reliable way I know of is to check for the | |
120 | existance of a $SHLIB_INFO$ section with a non-zero size. */ | |
121 | /* The code below is not a reliable way to check whether an | |
122 | * executable is dynamic, so I commented it out - RT | |
123 | * shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); | |
124 | * if (shlib_info) | |
125 | * dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0); | |
126 | * else | |
127 | * dynamic = 0; | |
128 | */ | |
129 | /* I replaced the code with a simple check for text offset not being | |
130 | * zero. Still not 100% reliable, but a more reliable way of asking | |
131 | * "is this a dynamic executable?" than the above. RT | |
132 | */ | |
133 | dynamic = (text_offset != 0); | |
134 | ||
135 | endbufp = buf + number_of_symbols; | |
136 | for (bufp = buf; bufp < endbufp; ++bufp) | |
137 | { | |
138 | enum minimal_symbol_type ms_type; | |
139 | ||
140 | QUIT; | |
141 | ||
142 | switch (bufp->symbol_scope) | |
143 | { | |
144 | case SS_UNIVERSAL: | |
145 | case SS_EXTERNAL: | |
146 | switch (bufp->symbol_type) | |
147 | { | |
148 | case ST_SYM_EXT: | |
149 | case ST_ARG_EXT: | |
150 | continue; | |
151 | ||
152 | case ST_CODE: | |
153 | case ST_PRI_PROG: | |
154 | case ST_SEC_PROG: | |
155 | case ST_MILLICODE: | |
156 | symname = bufp->name.n_strx + stringtab; | |
157 | ms_type = mst_text; | |
158 | bufp->symbol_value += text_offset; | |
159 | #ifdef SMASH_TEXT_ADDRESS | |
160 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
161 | #endif | |
162 | break; | |
163 | ||
164 | case ST_ENTRY: | |
165 | symname = bufp->name.n_strx + stringtab; | |
166 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
167 | the stubs, while the ST_CODE symbol is the real |
168 | function. */ | |
c906108c SS |
169 | if (dynamic) |
170 | ms_type = mst_solib_trampoline; | |
171 | else | |
172 | ms_type = mst_text; | |
173 | bufp->symbol_value += text_offset; | |
174 | #ifdef SMASH_TEXT_ADDRESS | |
175 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
176 | #endif | |
177 | break; | |
178 | ||
179 | case ST_STUB: | |
180 | symname = bufp->name.n_strx + stringtab; | |
181 | ms_type = mst_solib_trampoline; | |
182 | bufp->symbol_value += text_offset; | |
183 | #ifdef SMASH_TEXT_ADDRESS | |
184 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
185 | #endif | |
186 | break; | |
187 | ||
188 | case ST_DATA: | |
189 | symname = bufp->name.n_strx + stringtab; | |
190 | bufp->symbol_value += data_offset; | |
191 | ms_type = mst_data; | |
192 | break; | |
193 | default: | |
194 | continue; | |
195 | } | |
196 | break; | |
197 | ||
198 | #if 0 | |
199 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ | |
200 | case SS_GLOBAL: | |
201 | #endif | |
202 | case SS_LOCAL: | |
203 | switch (bufp->symbol_type) | |
204 | { | |
205 | case ST_SYM_EXT: | |
206 | case ST_ARG_EXT: | |
207 | continue; | |
208 | ||
209 | case ST_CODE: | |
210 | symname = bufp->name.n_strx + stringtab; | |
211 | ms_type = mst_file_text; | |
212 | bufp->symbol_value += text_offset; | |
213 | #ifdef SMASH_TEXT_ADDRESS | |
214 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
215 | #endif | |
216 | ||
217 | check_strange_names: | |
218 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local | |
c5aa993b JM |
219 | label prefixes for stabs, constant data, etc. So we need |
220 | only filter out L$ symbols which are left in due to | |
221 | limitations in how GAS generates SOM relocations. | |
222 | ||
223 | When linking in the HPUX C-library the HP linker has | |
224 | the nasty habit of placing section symbols from the literal | |
225 | subspaces in the middle of the program's text. Filter | |
226 | those out as best we can. Check for first and last character | |
227 | being '$'. | |
228 | ||
229 | And finally, the newer HP compilers emit crud like $PIC_foo$N | |
230 | in some circumstance (PIC code I guess). It's also claimed | |
231 | that they emit D$ symbols too. What stupidity. */ | |
c906108c | 232 | if ((symname[0] == 'L' && symname[1] == '$') |
c5aa993b | 233 | || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
c906108c SS |
234 | || (symname[0] == 'D' && symname[1] == '$') |
235 | || (strncmp (symname, "$PIC", 4) == 0)) | |
236 | continue; | |
237 | break; | |
238 | ||
239 | case ST_PRI_PROG: | |
240 | case ST_SEC_PROG: | |
241 | case ST_MILLICODE: | |
242 | symname = bufp->name.n_strx + stringtab; | |
243 | ms_type = mst_file_text; | |
244 | bufp->symbol_value += text_offset; | |
245 | #ifdef SMASH_TEXT_ADDRESS | |
246 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
247 | #endif | |
248 | break; | |
249 | ||
250 | case ST_ENTRY: | |
251 | symname = bufp->name.n_strx + stringtab; | |
252 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
253 | the stubs, while the ST_CODE symbol is the real |
254 | function. */ | |
c906108c SS |
255 | if (dynamic) |
256 | ms_type = mst_solib_trampoline; | |
257 | else | |
258 | ms_type = mst_file_text; | |
259 | bufp->symbol_value += text_offset; | |
260 | #ifdef SMASH_TEXT_ADDRESS | |
261 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
262 | #endif | |
263 | break; | |
264 | ||
265 | case ST_STUB: | |
266 | symname = bufp->name.n_strx + stringtab; | |
267 | ms_type = mst_solib_trampoline; | |
268 | bufp->symbol_value += text_offset; | |
269 | #ifdef SMASH_TEXT_ADDRESS | |
270 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
271 | #endif | |
272 | break; | |
273 | ||
274 | ||
275 | case ST_DATA: | |
276 | symname = bufp->name.n_strx + stringtab; | |
277 | bufp->symbol_value += data_offset; | |
278 | ms_type = mst_file_data; | |
279 | goto check_strange_names; | |
280 | ||
281 | default: | |
282 | continue; | |
283 | } | |
284 | break; | |
285 | ||
c5aa993b JM |
286 | /* This can happen for common symbols when -E is passed to the |
287 | final link. No idea _why_ that would make the linker force | |
288 | common symbols to have an SS_UNSAT scope, but it does. | |
c906108c | 289 | |
c5aa993b JM |
290 | This also happens for weak symbols, but their type is |
291 | ST_DATA. */ | |
c906108c SS |
292 | case SS_UNSAT: |
293 | switch (bufp->symbol_type) | |
294 | { | |
c5aa993b JM |
295 | case ST_STORAGE: |
296 | case ST_DATA: | |
297 | symname = bufp->name.n_strx + stringtab; | |
298 | bufp->symbol_value += data_offset; | |
299 | ms_type = mst_data; | |
300 | break; | |
301 | ||
302 | default: | |
303 | continue; | |
c906108c SS |
304 | } |
305 | break; | |
306 | ||
307 | default: | |
308 | continue; | |
309 | } | |
310 | ||
311 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) | |
312 | error ("Invalid symbol data; bad HP string table offset: %d", | |
313 | bufp->name.n_strx); | |
314 | ||
c5aa993b | 315 | prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
c906108c SS |
316 | objfile); |
317 | } | |
318 | } | |
319 | ||
320 | /* Scan and build partial symbols for a symbol file. | |
321 | We have been initialized by a call to som_symfile_init, which | |
322 | currently does nothing. | |
323 | ||
324 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
325 | in each section. This is ignored, as it isn't needed for SOM. | |
326 | ||
327 | MAINLINE is true if we are reading the main symbol | |
328 | table (as opposed to a shared lib or dynamically loaded file). | |
329 | ||
330 | This function only does the minimum work necessary for letting the | |
331 | user "name" things symbolically; it does not read the entire symtab. | |
332 | Instead, it reads the external and static symbols and puts them in partial | |
333 | symbol tables. When more extensive information is requested of a | |
334 | file, the corresponding partial symbol table is mutated into a full | |
335 | fledged symbol table by going back and reading the symbols | |
336 | for real. | |
337 | ||
338 | We look for sections with specific names, to tell us what debug | |
339 | format to look for: FIXME!!! | |
340 | ||
341 | somstab_build_psymtabs() handles STABS symbols. | |
342 | ||
343 | Note that SOM files have a "minimal" symbol table, which is vaguely | |
344 | reminiscent of a COFF symbol table, but has only the minimal information | |
345 | necessary for linking. We process this also, and use the information to | |
346 | build gdb's minimal symbol table. This gives us some minimal debugging | |
347 | capability even for files compiled without -g. */ | |
348 | ||
349 | static void | |
96baa820 | 350 | som_symfile_read (objfile, mainline) |
c906108c | 351 | struct objfile *objfile; |
c906108c SS |
352 | int mainline; |
353 | { | |
354 | bfd *abfd = objfile->obfd; | |
355 | struct cleanup *back_to; | |
356 | ||
357 | do_pxdb (symfile_bfd_open (objfile->name)); | |
358 | ||
359 | init_minimal_symbol_collection (); | |
56e290f4 | 360 | back_to = make_cleanup_discard_minimal_symbols (); |
c906108c SS |
361 | |
362 | /* Read in the import list and the export list. Currently | |
363 | the export list isn't used; the import list is used in | |
364 | hp-symtab-read.c to handle static vars declared in other | |
365 | shared libraries. */ | |
366 | init_import_symbols (objfile); | |
c5aa993b | 367 | #if 0 /* Export symbols not used today 1997-08-05 */ |
c906108c SS |
368 | init_export_symbols (objfile); |
369 | #else | |
370 | objfile->export_list = NULL; | |
371 | objfile->export_list_size = 0; | |
372 | #endif | |
373 | ||
374 | /* Process the normal SOM symbol table first. | |
375 | This reads in the DNTT and string table, but doesn't | |
376 | actually scan the DNTT. It does scan the linker symbol | |
377 | table and thus build up a "minimal symbol table". */ | |
c5aa993b | 378 | |
96baa820 | 379 | som_symtab_read (abfd, objfile, objfile->section_offsets); |
c906108c SS |
380 | |
381 | /* Now read information from the stabs debug sections. | |
382 | This is a no-op for SOM. | |
383 | Perhaps it is intended for some kind of mixed STABS/SOM | |
c5aa993b | 384 | situation? */ |
96baa820 | 385 | stabsect_build_psymtabs (objfile, mainline, |
c906108c SS |
386 | "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
387 | ||
388 | /* Now read the native debug information. | |
389 | This builds the psymtab. This used to be done via a scan of | |
390 | the DNTT, but is now done via the PXDB-built quick-lookup tables | |
391 | together with a scan of the GNTT. See hp-psymtab-read.c. */ | |
d4f3574e | 392 | hpread_build_psymtabs (objfile, mainline); |
c906108c SS |
393 | |
394 | /* Install any minimal symbols that have been collected as the current | |
395 | minimal symbols for this objfile. | |
396 | Further symbol-reading is done incrementally, file-by-file, | |
397 | in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c | |
398 | contains the code to do the actual DNTT scanning and symtab building. */ | |
399 | install_minimal_symbols (objfile); | |
400 | ||
401 | /* Force hppa-tdep.c to re-read the unwind descriptors. */ | |
402 | objfile->obj_private = NULL; | |
403 | do_cleanups (back_to); | |
404 | } | |
405 | ||
406 | /* Initialize anything that needs initializing when a completely new symbol | |
407 | file is specified (not just adding some symbols from another file, e.g. a | |
408 | shared library). | |
409 | ||
410 | We reinitialize buildsym, since we may be reading stabs from a SOM file. */ | |
411 | ||
412 | static void | |
413 | som_new_init (ignore) | |
414 | struct objfile *ignore; | |
415 | { | |
416 | stabsread_new_init (); | |
417 | buildsym_new_init (); | |
418 | } | |
419 | ||
420 | /* Perform any local cleanups required when we are done with a particular | |
421 | objfile. I.E, we are in the process of discarding all symbol information | |
422 | for an objfile, freeing up all memory held for it, and unlinking the | |
423 | objfile struct from the global list of known objfiles. */ | |
424 | ||
425 | static void | |
426 | som_symfile_finish (objfile) | |
427 | struct objfile *objfile; | |
428 | { | |
c5aa993b | 429 | if (objfile->sym_stab_info != NULL) |
c906108c | 430 | { |
c5aa993b | 431 | mfree (objfile->md, objfile->sym_stab_info); |
c906108c SS |
432 | } |
433 | hpread_symfile_finish (objfile); | |
434 | } | |
435 | ||
436 | /* SOM specific initialization routine for reading symbols. */ | |
437 | ||
438 | static void | |
439 | som_symfile_init (objfile) | |
440 | struct objfile *objfile; | |
441 | { | |
442 | /* SOM objects may be reordered, so set OBJF_REORDERED. If we | |
443 | find this causes a significant slowdown in gdb then we could | |
444 | set it in the debug symbol readers only when necessary. */ | |
445 | objfile->flags |= OBJF_REORDERED; | |
446 | hpread_symfile_init (objfile); | |
447 | } | |
448 | ||
449 | /* SOM specific parsing routine for section offsets. | |
450 | ||
451 | Plain and simple for now. */ | |
452 | ||
d4f3574e | 453 | static void |
2acceee2 | 454 | som_symfile_offsets (objfile, addrs) |
c906108c | 455 | struct objfile *objfile; |
2acceee2 | 456 | struct section_addr_info *addrs; |
c906108c | 457 | { |
c906108c | 458 | int i; |
0aa9cf96 | 459 | CORE_ADDR text_addr; |
c906108c SS |
460 | |
461 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 462 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 463 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
c906108c | 464 | |
b8fbeb18 EZ |
465 | /* FIXME: ezannoni 2000-04-20 The section names in SOM are not |
466 | .text, .data, etc, but $TEXT$, $DATA$,... We should initialize | |
467 | SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't | |
468 | know the correspondence between SOM sections and GDB's idea of | |
469 | section names. So for now we default to what is was before these | |
470 | changes.*/ | |
471 | objfile->sect_index_text = 0; | |
472 | objfile->sect_index_data = 1; | |
473 | objfile->sect_index_bss = 2; | |
474 | objfile->sect_index_rodata = 3; | |
475 | ||
c906108c | 476 | /* First see if we're a shared library. If so, get the section |
2acceee2 | 477 | offsets from the library, else get them from addrs. */ |
d4f3574e | 478 | if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
c906108c | 479 | { |
b8fbeb18 EZ |
480 | /* Note: Here is OK to compare with ".text" because this is the |
481 | name that gdb itself gives to that section, not the SOM | |
482 | name. */ | |
0aa9cf96 EZ |
483 | for (i = 0; i < SECT_OFF_MAX && addrs->other[i].name; i++) |
484 | if (strcmp (addrs->other[i].name, ".text") == 0) | |
485 | break; | |
486 | text_addr = addrs->other[i].addr; | |
487 | ||
c906108c | 488 | for (i = 0; i < SECT_OFF_MAX; i++) |
0aa9cf96 | 489 | ANOFFSET (objfile->section_offsets, i) = text_addr; |
c906108c | 490 | } |
c906108c SS |
491 | } |
492 | ||
c906108c SS |
493 | /* Read in and initialize the SOM import list which is present |
494 | for all executables and shared libraries. The import list | |
495 | consists of the symbols that are referenced in OBJFILE but | |
496 | not defined there. (Variables that are imported are dealt | |
497 | with as "loc_indirect" vars.) | |
498 | Return value = number of import symbols read in. */ | |
499 | int | |
500 | init_import_symbols (objfile) | |
c5aa993b | 501 | struct objfile *objfile; |
c906108c SS |
502 | { |
503 | unsigned int import_list; | |
504 | unsigned int import_list_size; | |
505 | unsigned int string_table; | |
506 | unsigned int string_table_size; | |
c5aa993b | 507 | char *string_buffer; |
c906108c SS |
508 | register int i; |
509 | register int j; | |
510 | register int k; | |
c5aa993b JM |
511 | asection *text_section; /* section handle */ |
512 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
513 | |
514 | /* A struct for an entry in the SOM import list */ | |
c5aa993b JM |
515 | typedef struct |
516 | { | |
517 | int name; /* index into the string table */ | |
518 | short dont_care1; /* we don't use this */ | |
519 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
520 | unsigned int reserved2:8; /* not used */ | |
521 | } | |
522 | SomImportEntry; | |
523 | ||
524 | /* We read 100 entries in at a time from the disk file. */ | |
525 | #define SOM_READ_IMPORTS_NUM 100 | |
526 | #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) | |
c906108c | 527 | SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
c5aa993b | 528 | |
c906108c SS |
529 | /* Initialize in case we error out */ |
530 | objfile->import_list = NULL; | |
531 | objfile->import_list_size = 0; | |
532 | ||
c906108c | 533 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 534 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
535 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
536 | if (!text_section) | |
537 | return 0; | |
c5aa993b | 538 | /* Get the SOM executable header */ |
c906108c SS |
539 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
540 | ||
541 | /* Check header version number for 10.x HP-UX */ | |
542 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 543 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
544 | if (dl_header[0] != 93092112) |
545 | return 0; | |
c5aa993b JM |
546 | |
547 | import_list = dl_header[4]; | |
c906108c SS |
548 | import_list_size = dl_header[5]; |
549 | if (!import_list_size) | |
550 | return 0; | |
c5aa993b | 551 | string_table = dl_header[10]; |
c906108c SS |
552 | string_table_size = dl_header[11]; |
553 | if (!string_table_size) | |
554 | return 0; | |
555 | ||
c5aa993b | 556 | /* Suck in SOM string table */ |
c906108c SS |
557 | string_buffer = (char *) xmalloc (string_table_size); |
558 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 559 | string_table, string_table_size); |
c906108c SS |
560 | |
561 | /* Allocate import list in the psymbol obstack; this has nothing | |
562 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 563 | import list to be freed when the objfile is deallocated */ |
c906108c SS |
564 | objfile->import_list |
565 | = (ImportEntry *) obstack_alloc (&objfile->psymbol_obstack, | |
c5aa993b | 566 | import_list_size * sizeof (ImportEntry)); |
c906108c | 567 | |
c5aa993b JM |
568 | /* Read in the import entries, a bunch at a time */ |
569 | for (j = 0, k = 0; | |
c906108c SS |
570 | j < (import_list_size / SOM_READ_IMPORTS_NUM); |
571 | j++) | |
572 | { | |
573 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
574 | import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
575 | SOM_READ_IMPORTS_CHUNK_SIZE); | |
576 | for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) | |
577 | { | |
578 | if (buffer[i].type != (unsigned char) 0) | |
579 | { | |
580 | objfile->import_list[k] | |
581 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
582 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
583 | /* Some day we might want to record the type and other information too */ | |
584 | } | |
585 | else /* null type */ | |
586 | objfile->import_list[k] = NULL; | |
587 | ||
588 | } | |
c906108c SS |
589 | } |
590 | ||
c5aa993b | 591 | /* Get the leftovers */ |
c906108c SS |
592 | if (k < import_list_size) |
593 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
594 | import_list + k * sizeof (SomImportEntry), |
595 | (import_list_size - k) * sizeof (SomImportEntry)); | |
596 | for (i = 0; k < import_list_size; i++, k++) | |
c906108c SS |
597 | { |
598 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
599 | { |
600 | objfile->import_list[k] | |
601 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
602 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
603 | /* Some day we might want to record the type and other information too */ | |
604 | } | |
c906108c | 605 | else |
c5aa993b | 606 | objfile->import_list[k] = NULL; |
c906108c SS |
607 | } |
608 | ||
609 | objfile->import_list_size = import_list_size; | |
610 | free (string_buffer); | |
611 | return import_list_size; | |
612 | } | |
613 | ||
614 | /* Read in and initialize the SOM export list which is present | |
615 | for all executables and shared libraries. The import list | |
616 | consists of the symbols that are referenced in OBJFILE but | |
617 | not defined there. (Variables that are imported are dealt | |
618 | with as "loc_indirect" vars.) | |
619 | Return value = number of import symbols read in. */ | |
620 | int | |
621 | init_export_symbols (objfile) | |
c5aa993b | 622 | struct objfile *objfile; |
c906108c SS |
623 | { |
624 | unsigned int export_list; | |
625 | unsigned int export_list_size; | |
626 | unsigned int string_table; | |
627 | unsigned int string_table_size; | |
c5aa993b | 628 | char *string_buffer; |
c906108c SS |
629 | register int i; |
630 | register int j; | |
631 | register int k; | |
c5aa993b JM |
632 | asection *text_section; /* section handle */ |
633 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
634 | |
635 | /* A struct for an entry in the SOM export list */ | |
c5aa993b JM |
636 | typedef struct |
637 | { | |
638 | int next; /* for hash table use -- we don't use this */ | |
639 | int name; /* index into string table */ | |
640 | int value; /* offset or plabel */ | |
641 | int dont_care1; /* not used */ | |
642 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
643 | char dont_care2; /* not used */ | |
644 | short dont_care3; /* not used */ | |
645 | } | |
646 | SomExportEntry; | |
647 | ||
648 | /* We read 100 entries in at a time from the disk file. */ | |
649 | #define SOM_READ_EXPORTS_NUM 100 | |
650 | #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) | |
c906108c SS |
651 | SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
652 | ||
653 | /* Initialize in case we error out */ | |
654 | objfile->export_list = NULL; | |
655 | objfile->export_list_size = 0; | |
656 | ||
c906108c | 657 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 658 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
659 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
660 | if (!text_section) | |
661 | return 0; | |
c5aa993b | 662 | /* Get the SOM executable header */ |
c906108c SS |
663 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
664 | ||
665 | /* Check header version number for 10.x HP-UX */ | |
666 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 667 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
668 | if (dl_header[0] != 93092112) |
669 | return 0; | |
c5aa993b JM |
670 | |
671 | export_list = dl_header[8]; | |
672 | export_list_size = dl_header[9]; | |
c906108c SS |
673 | if (!export_list_size) |
674 | return 0; | |
c5aa993b | 675 | string_table = dl_header[10]; |
c906108c SS |
676 | string_table_size = dl_header[11]; |
677 | if (!string_table_size) | |
678 | return 0; | |
679 | ||
c5aa993b | 680 | /* Suck in SOM string table */ |
c906108c SS |
681 | string_buffer = (char *) xmalloc (string_table_size); |
682 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 683 | string_table, string_table_size); |
c906108c SS |
684 | |
685 | /* Allocate export list in the psymbol obstack; this has nothing | |
686 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 687 | export list to be freed when the objfile is deallocated */ |
c906108c | 688 | objfile->export_list |
c5aa993b JM |
689 | = (ExportEntry *) obstack_alloc (&objfile->psymbol_obstack, |
690 | export_list_size * sizeof (ExportEntry)); | |
c906108c | 691 | |
c5aa993b JM |
692 | /* Read in the export entries, a bunch at a time */ |
693 | for (j = 0, k = 0; | |
c906108c SS |
694 | j < (export_list_size / SOM_READ_EXPORTS_NUM); |
695 | j++) | |
696 | { | |
697 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
698 | export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
699 | SOM_READ_EXPORTS_CHUNK_SIZE); | |
700 | for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) | |
701 | { | |
702 | if (buffer[i].type != (unsigned char) 0) | |
703 | { | |
704 | objfile->export_list[k].name | |
705 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
706 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
707 | objfile->export_list[k].address = buffer[i].value; | |
708 | /* Some day we might want to record the type and other information too */ | |
709 | } | |
710 | else | |
711 | /* null type */ | |
712 | { | |
713 | objfile->export_list[k].name = NULL; | |
714 | objfile->export_list[k].address = 0; | |
715 | } | |
716 | } | |
c906108c SS |
717 | } |
718 | ||
c5aa993b | 719 | /* Get the leftovers */ |
c906108c SS |
720 | if (k < export_list_size) |
721 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
722 | export_list + k * sizeof (SomExportEntry), |
723 | (export_list_size - k) * sizeof (SomExportEntry)); | |
724 | for (i = 0; k < export_list_size; i++, k++) | |
c906108c SS |
725 | { |
726 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
727 | { |
728 | objfile->export_list[k].name | |
729 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
730 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
731 | /* Some day we might want to record the type and other information too */ | |
732 | objfile->export_list[k].address = buffer[i].value; | |
733 | } | |
c906108c | 734 | else |
c5aa993b JM |
735 | { |
736 | objfile->export_list[k].name = NULL; | |
737 | objfile->export_list[k].address = 0; | |
738 | } | |
c906108c SS |
739 | } |
740 | ||
741 | objfile->export_list_size = export_list_size; | |
742 | free (string_buffer); | |
743 | return export_list_size; | |
744 | } | |
c5aa993b | 745 | \f |
c906108c SS |
746 | |
747 | ||
c906108c SS |
748 | /* Register that we are able to handle SOM object file formats. */ |
749 | ||
750 | static struct sym_fns som_sym_fns = | |
751 | { | |
752 | bfd_target_som_flavour, | |
c5aa993b JM |
753 | som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
754 | som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
755 | som_symfile_read, /* sym_read: read a symbol file into symtab */ | |
756 | som_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
757 | som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ | |
758 | NULL /* next: pointer to next struct sym_fns */ | |
c906108c SS |
759 | }; |
760 | ||
761 | void | |
762 | _initialize_somread () | |
763 | { | |
764 | add_symtab_fns (&som_sym_fns); | |
765 | } |