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