Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Read HP PA/Risc object files for GDB. |
3a42e9d0 | 2 | Copyright 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001 |
b6ba6518 | 3 | Free Software Foundation, Inc. |
c906108c SS |
4 | Written by Fred Fish at Cygnus Support. |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
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. | |
c906108c | 12 | |
c5aa993b JM |
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. | |
c906108c | 17 | |
c5aa993b JM |
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. */ | |
c906108c SS |
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 | /* Various things we might complain about... */ | |
39 | ||
a14ed312 | 40 | static void som_symfile_init (struct objfile *); |
c906108c | 41 | |
a14ed312 | 42 | static void som_new_init (struct objfile *); |
c906108c | 43 | |
a14ed312 | 44 | static void som_symfile_read (struct objfile *, int); |
c906108c | 45 | |
a14ed312 | 46 | static void som_symfile_finish (struct objfile *); |
c906108c SS |
47 | |
48 | static void | |
a14ed312 | 49 | som_symtab_read (bfd *, struct objfile *, struct section_offsets *); |
c906108c | 50 | |
d4f3574e | 51 | static void |
a14ed312 | 52 | som_symfile_offsets (struct objfile *, struct section_addr_info *); |
c906108c SS |
53 | |
54 | /* FIXME: These should really be in a common header somewhere */ | |
55 | ||
a14ed312 | 56 | extern void hpread_build_psymtabs (struct objfile *, int); |
c906108c | 57 | |
a14ed312 | 58 | extern void hpread_symfile_finish (struct objfile *); |
c906108c | 59 | |
a14ed312 | 60 | extern void hpread_symfile_init (struct objfile *); |
c906108c | 61 | |
a14ed312 | 62 | extern void do_pxdb (bfd *); |
c906108c SS |
63 | |
64 | /* | |
65 | ||
c5aa993b | 66 | LOCAL FUNCTION |
c906108c | 67 | |
c5aa993b | 68 | som_symtab_read -- read the symbol table of a SOM file |
c906108c | 69 | |
c5aa993b | 70 | SYNOPSIS |
c906108c | 71 | |
c5aa993b JM |
72 | void som_symtab_read (bfd *abfd, struct objfile *objfile, |
73 | struct section_offsets *section_offsets) | |
c906108c | 74 | |
c5aa993b | 75 | DESCRIPTION |
c906108c | 76 | |
c5aa993b JM |
77 | Given an open bfd, a base address to relocate symbols to, and a |
78 | flag that specifies whether or not this bfd is for an executable | |
79 | or not (may be shared library for example), add all the global | |
80 | function and data symbols to the minimal symbol table. | |
81 | */ | |
c906108c SS |
82 | |
83 | static void | |
fba45db2 KB |
84 | som_symtab_read (bfd *abfd, struct objfile *objfile, |
85 | struct section_offsets *section_offsets) | |
c906108c SS |
86 | { |
87 | unsigned int number_of_symbols; | |
88 | int val, dynamic; | |
89 | char *stringtab; | |
90 | asection *shlib_info; | |
91 | struct symbol_dictionary_record *buf, *bufp, *endbufp; | |
92 | char *symname; | |
93 | CONST int symsize = sizeof (struct symbol_dictionary_record); | |
94 | CORE_ADDR text_offset, data_offset; | |
95 | ||
96 | ||
97 | text_offset = ANOFFSET (section_offsets, 0); | |
98 | data_offset = ANOFFSET (section_offsets, 1); | |
99 | ||
100 | number_of_symbols = bfd_get_symcount (abfd); | |
101 | ||
102 | buf = alloca (symsize * number_of_symbols); | |
103 | bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); | |
3a42e9d0 | 104 | val = bfd_bread (buf, symsize * number_of_symbols, abfd); |
c906108c SS |
105 | if (val != symsize * number_of_symbols) |
106 | error ("Couldn't read symbol dictionary!"); | |
107 | ||
108 | stringtab = alloca (obj_som_stringtab_size (abfd)); | |
109 | bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); | |
3a42e9d0 | 110 | val = bfd_bread (stringtab, obj_som_stringtab_size (abfd), abfd); |
c906108c SS |
111 | if (val != obj_som_stringtab_size (abfd)) |
112 | error ("Can't read in HP string table."); | |
113 | ||
114 | /* We need to determine if objfile is a dynamic executable (so we | |
115 | can do the right thing for ST_ENTRY vs ST_CODE symbols). | |
116 | ||
117 | There's nothing in the header which easily allows us to do | |
118 | this. The only reliable way I know of is to check for the | |
8e1a459b | 119 | existence of a $SHLIB_INFO$ section with a non-zero size. */ |
c906108c SS |
120 | /* The code below is not a reliable way to check whether an |
121 | * executable is dynamic, so I commented it out - RT | |
122 | * shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); | |
123 | * if (shlib_info) | |
124 | * dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0); | |
125 | * else | |
126 | * dynamic = 0; | |
127 | */ | |
128 | /* I replaced the code with a simple check for text offset not being | |
129 | * zero. Still not 100% reliable, but a more reliable way of asking | |
130 | * "is this a dynamic executable?" than the above. RT | |
131 | */ | |
132 | dynamic = (text_offset != 0); | |
133 | ||
134 | endbufp = buf + number_of_symbols; | |
135 | for (bufp = buf; bufp < endbufp; ++bufp) | |
136 | { | |
137 | enum minimal_symbol_type ms_type; | |
138 | ||
139 | QUIT; | |
140 | ||
141 | switch (bufp->symbol_scope) | |
142 | { | |
143 | case SS_UNIVERSAL: | |
144 | case SS_EXTERNAL: | |
145 | switch (bufp->symbol_type) | |
146 | { | |
147 | case ST_SYM_EXT: | |
148 | case ST_ARG_EXT: | |
149 | continue; | |
150 | ||
151 | case ST_CODE: | |
152 | case ST_PRI_PROG: | |
153 | case ST_SEC_PROG: | |
154 | case ST_MILLICODE: | |
155 | symname = bufp->name.n_strx + stringtab; | |
156 | ms_type = mst_text; | |
157 | bufp->symbol_value += text_offset; | |
158 | #ifdef SMASH_TEXT_ADDRESS | |
159 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
160 | #endif | |
161 | break; | |
162 | ||
163 | case ST_ENTRY: | |
164 | symname = bufp->name.n_strx + stringtab; | |
165 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
166 | the stubs, while the ST_CODE symbol is the real |
167 | function. */ | |
c906108c SS |
168 | if (dynamic) |
169 | ms_type = mst_solib_trampoline; | |
170 | else | |
171 | ms_type = mst_text; | |
172 | bufp->symbol_value += text_offset; | |
173 | #ifdef SMASH_TEXT_ADDRESS | |
174 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
175 | #endif | |
176 | break; | |
177 | ||
178 | case ST_STUB: | |
179 | symname = bufp->name.n_strx + stringtab; | |
180 | ms_type = mst_solib_trampoline; | |
181 | bufp->symbol_value += text_offset; | |
182 | #ifdef SMASH_TEXT_ADDRESS | |
183 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
184 | #endif | |
185 | break; | |
186 | ||
187 | case ST_DATA: | |
188 | symname = bufp->name.n_strx + stringtab; | |
189 | bufp->symbol_value += data_offset; | |
190 | ms_type = mst_data; | |
191 | break; | |
192 | default: | |
193 | continue; | |
194 | } | |
195 | break; | |
196 | ||
197 | #if 0 | |
198 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ | |
199 | case SS_GLOBAL: | |
200 | #endif | |
201 | case SS_LOCAL: | |
202 | switch (bufp->symbol_type) | |
203 | { | |
204 | case ST_SYM_EXT: | |
205 | case ST_ARG_EXT: | |
206 | continue; | |
207 | ||
208 | case ST_CODE: | |
209 | symname = bufp->name.n_strx + stringtab; | |
210 | ms_type = mst_file_text; | |
211 | bufp->symbol_value += text_offset; | |
212 | #ifdef SMASH_TEXT_ADDRESS | |
213 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
214 | #endif | |
215 | ||
216 | check_strange_names: | |
217 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local | |
c5aa993b JM |
218 | label prefixes for stabs, constant data, etc. So we need |
219 | only filter out L$ symbols which are left in due to | |
220 | limitations in how GAS generates SOM relocations. | |
221 | ||
222 | When linking in the HPUX C-library the HP linker has | |
223 | the nasty habit of placing section symbols from the literal | |
224 | subspaces in the middle of the program's text. Filter | |
225 | those out as best we can. Check for first and last character | |
226 | being '$'. | |
227 | ||
228 | And finally, the newer HP compilers emit crud like $PIC_foo$N | |
229 | in some circumstance (PIC code I guess). It's also claimed | |
230 | that they emit D$ symbols too. What stupidity. */ | |
c906108c | 231 | if ((symname[0] == 'L' && symname[1] == '$') |
c5aa993b | 232 | || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
c906108c SS |
233 | || (symname[0] == 'D' && symname[1] == '$') |
234 | || (strncmp (symname, "$PIC", 4) == 0)) | |
235 | continue; | |
236 | break; | |
237 | ||
238 | case ST_PRI_PROG: | |
239 | case ST_SEC_PROG: | |
240 | case ST_MILLICODE: | |
241 | symname = bufp->name.n_strx + stringtab; | |
242 | ms_type = mst_file_text; | |
243 | bufp->symbol_value += text_offset; | |
244 | #ifdef SMASH_TEXT_ADDRESS | |
245 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
246 | #endif | |
247 | break; | |
248 | ||
249 | case ST_ENTRY: | |
250 | symname = bufp->name.n_strx + stringtab; | |
251 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
252 | the stubs, while the ST_CODE symbol is the real |
253 | function. */ | |
c906108c SS |
254 | if (dynamic) |
255 | ms_type = mst_solib_trampoline; | |
256 | else | |
257 | ms_type = mst_file_text; | |
258 | bufp->symbol_value += text_offset; | |
259 | #ifdef SMASH_TEXT_ADDRESS | |
260 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
261 | #endif | |
262 | break; | |
263 | ||
264 | case ST_STUB: | |
265 | symname = bufp->name.n_strx + stringtab; | |
266 | ms_type = mst_solib_trampoline; | |
267 | bufp->symbol_value += text_offset; | |
268 | #ifdef SMASH_TEXT_ADDRESS | |
269 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
270 | #endif | |
271 | break; | |
272 | ||
273 | ||
274 | case ST_DATA: | |
275 | symname = bufp->name.n_strx + stringtab; | |
276 | bufp->symbol_value += data_offset; | |
277 | ms_type = mst_file_data; | |
278 | goto check_strange_names; | |
279 | ||
280 | default: | |
281 | continue; | |
282 | } | |
283 | break; | |
284 | ||
c5aa993b JM |
285 | /* This can happen for common symbols when -E is passed to the |
286 | final link. No idea _why_ that would make the linker force | |
287 | common symbols to have an SS_UNSAT scope, but it does. | |
c906108c | 288 | |
c5aa993b JM |
289 | This also happens for weak symbols, but their type is |
290 | ST_DATA. */ | |
c906108c SS |
291 | case SS_UNSAT: |
292 | switch (bufp->symbol_type) | |
293 | { | |
c5aa993b JM |
294 | case ST_STORAGE: |
295 | case ST_DATA: | |
296 | symname = bufp->name.n_strx + stringtab; | |
297 | bufp->symbol_value += data_offset; | |
298 | ms_type = mst_data; | |
299 | break; | |
300 | ||
301 | default: | |
302 | continue; | |
c906108c SS |
303 | } |
304 | break; | |
305 | ||
306 | default: | |
307 | continue; | |
308 | } | |
309 | ||
310 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) | |
311 | error ("Invalid symbol data; bad HP string table offset: %d", | |
312 | bufp->name.n_strx); | |
313 | ||
c5aa993b | 314 | prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
c906108c SS |
315 | objfile); |
316 | } | |
317 | } | |
318 | ||
319 | /* Scan and build partial symbols for a symbol file. | |
320 | We have been initialized by a call to som_symfile_init, which | |
321 | currently does nothing. | |
322 | ||
323 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
324 | in each section. This is ignored, as it isn't needed for SOM. | |
325 | ||
326 | MAINLINE is true if we are reading the main symbol | |
327 | table (as opposed to a shared lib or dynamically loaded file). | |
328 | ||
329 | This function only does the minimum work necessary for letting the | |
330 | user "name" things symbolically; it does not read the entire symtab. | |
331 | Instead, it reads the external and static symbols and puts them in partial | |
332 | symbol tables. When more extensive information is requested of a | |
333 | file, the corresponding partial symbol table is mutated into a full | |
334 | fledged symbol table by going back and reading the symbols | |
335 | for real. | |
336 | ||
337 | We look for sections with specific names, to tell us what debug | |
338 | format to look for: FIXME!!! | |
339 | ||
340 | somstab_build_psymtabs() handles STABS symbols. | |
341 | ||
342 | Note that SOM files have a "minimal" symbol table, which is vaguely | |
343 | reminiscent of a COFF symbol table, but has only the minimal information | |
344 | necessary for linking. We process this also, and use the information to | |
345 | build gdb's minimal symbol table. This gives us some minimal debugging | |
346 | capability even for files compiled without -g. */ | |
347 | ||
348 | static void | |
fba45db2 | 349 | som_symfile_read (struct objfile *objfile, int mainline) |
c906108c SS |
350 | { |
351 | bfd *abfd = objfile->obfd; | |
352 | struct cleanup *back_to; | |
353 | ||
354 | do_pxdb (symfile_bfd_open (objfile->name)); | |
355 | ||
356 | init_minimal_symbol_collection (); | |
56e290f4 | 357 | back_to = make_cleanup_discard_minimal_symbols (); |
c906108c SS |
358 | |
359 | /* Read in the import list and the export list. Currently | |
360 | the export list isn't used; the import list is used in | |
361 | hp-symtab-read.c to handle static vars declared in other | |
362 | shared libraries. */ | |
363 | init_import_symbols (objfile); | |
c5aa993b | 364 | #if 0 /* Export symbols not used today 1997-08-05 */ |
c906108c SS |
365 | init_export_symbols (objfile); |
366 | #else | |
367 | objfile->export_list = NULL; | |
368 | objfile->export_list_size = 0; | |
369 | #endif | |
370 | ||
371 | /* Process the normal SOM symbol table first. | |
372 | This reads in the DNTT and string table, but doesn't | |
373 | actually scan the DNTT. It does scan the linker symbol | |
374 | table and thus build up a "minimal symbol table". */ | |
c5aa993b | 375 | |
96baa820 | 376 | som_symtab_read (abfd, objfile, objfile->section_offsets); |
c906108c SS |
377 | |
378 | /* Now read information from the stabs debug sections. | |
379 | This is a no-op for SOM. | |
380 | Perhaps it is intended for some kind of mixed STABS/SOM | |
c5aa993b | 381 | situation? */ |
96baa820 | 382 | stabsect_build_psymtabs (objfile, mainline, |
c906108c SS |
383 | "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
384 | ||
385 | /* Now read the native debug information. | |
386 | This builds the psymtab. This used to be done via a scan of | |
387 | the DNTT, but is now done via the PXDB-built quick-lookup tables | |
388 | together with a scan of the GNTT. See hp-psymtab-read.c. */ | |
d4f3574e | 389 | hpread_build_psymtabs (objfile, mainline); |
c906108c SS |
390 | |
391 | /* Install any minimal symbols that have been collected as the current | |
392 | minimal symbols for this objfile. | |
393 | Further symbol-reading is done incrementally, file-by-file, | |
394 | in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c | |
395 | contains the code to do the actual DNTT scanning and symtab building. */ | |
396 | install_minimal_symbols (objfile); | |
397 | ||
398 | /* Force hppa-tdep.c to re-read the unwind descriptors. */ | |
399 | objfile->obj_private = NULL; | |
400 | do_cleanups (back_to); | |
401 | } | |
402 | ||
403 | /* Initialize anything that needs initializing when a completely new symbol | |
404 | file is specified (not just adding some symbols from another file, e.g. a | |
405 | shared library). | |
406 | ||
407 | We reinitialize buildsym, since we may be reading stabs from a SOM file. */ | |
408 | ||
409 | static void | |
fba45db2 | 410 | som_new_init (struct objfile *ignore) |
c906108c SS |
411 | { |
412 | stabsread_new_init (); | |
413 | buildsym_new_init (); | |
414 | } | |
415 | ||
416 | /* Perform any local cleanups required when we are done with a particular | |
417 | objfile. I.E, we are in the process of discarding all symbol information | |
418 | for an objfile, freeing up all memory held for it, and unlinking the | |
419 | objfile struct from the global list of known objfiles. */ | |
420 | ||
421 | static void | |
fba45db2 | 422 | som_symfile_finish (struct objfile *objfile) |
c906108c | 423 | { |
c5aa993b | 424 | if (objfile->sym_stab_info != NULL) |
c906108c | 425 | { |
c5aa993b | 426 | mfree (objfile->md, objfile->sym_stab_info); |
c906108c SS |
427 | } |
428 | hpread_symfile_finish (objfile); | |
429 | } | |
430 | ||
431 | /* SOM specific initialization routine for reading symbols. */ | |
432 | ||
433 | static void | |
fba45db2 | 434 | som_symfile_init (struct objfile *objfile) |
c906108c SS |
435 | { |
436 | /* SOM objects may be reordered, so set OBJF_REORDERED. If we | |
437 | find this causes a significant slowdown in gdb then we could | |
438 | set it in the debug symbol readers only when necessary. */ | |
439 | objfile->flags |= OBJF_REORDERED; | |
440 | hpread_symfile_init (objfile); | |
441 | } | |
442 | ||
443 | /* SOM specific parsing routine for section offsets. | |
444 | ||
445 | Plain and simple for now. */ | |
446 | ||
d4f3574e | 447 | static void |
fba45db2 | 448 | som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
c906108c | 449 | { |
c906108c | 450 | int i; |
0aa9cf96 | 451 | CORE_ADDR text_addr; |
c906108c SS |
452 | |
453 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 454 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 455 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
c906108c | 456 | |
b8fbeb18 EZ |
457 | /* FIXME: ezannoni 2000-04-20 The section names in SOM are not |
458 | .text, .data, etc, but $TEXT$, $DATA$,... We should initialize | |
459 | SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't | |
460 | know the correspondence between SOM sections and GDB's idea of | |
461 | section names. So for now we default to what is was before these | |
462 | changes.*/ | |
463 | objfile->sect_index_text = 0; | |
464 | objfile->sect_index_data = 1; | |
465 | objfile->sect_index_bss = 2; | |
466 | objfile->sect_index_rodata = 3; | |
467 | ||
c906108c | 468 | /* First see if we're a shared library. If so, get the section |
2acceee2 | 469 | offsets from the library, else get them from addrs. */ |
d4f3574e | 470 | if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
c906108c | 471 | { |
b8fbeb18 EZ |
472 | /* Note: Here is OK to compare with ".text" because this is the |
473 | name that gdb itself gives to that section, not the SOM | |
474 | name. */ | |
0aa9cf96 EZ |
475 | for (i = 0; i < SECT_OFF_MAX && addrs->other[i].name; i++) |
476 | if (strcmp (addrs->other[i].name, ".text") == 0) | |
477 | break; | |
478 | text_addr = addrs->other[i].addr; | |
479 | ||
c906108c | 480 | for (i = 0; i < SECT_OFF_MAX; i++) |
f0a58b0b | 481 | (objfile->section_offsets)->offsets[i] = text_addr; |
c906108c | 482 | } |
c906108c SS |
483 | } |
484 | ||
c906108c SS |
485 | /* Read in and initialize the SOM import list which is present |
486 | for all executables and shared libraries. The import list | |
487 | consists of the symbols that are referenced in OBJFILE but | |
488 | not defined there. (Variables that are imported are dealt | |
489 | with as "loc_indirect" vars.) | |
490 | Return value = number of import symbols read in. */ | |
491 | int | |
fba45db2 | 492 | init_import_symbols (struct objfile *objfile) |
c906108c SS |
493 | { |
494 | unsigned int import_list; | |
495 | unsigned int import_list_size; | |
496 | unsigned int string_table; | |
497 | unsigned int string_table_size; | |
c5aa993b | 498 | char *string_buffer; |
c906108c SS |
499 | register int i; |
500 | register int j; | |
501 | register int k; | |
c5aa993b JM |
502 | asection *text_section; /* section handle */ |
503 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
504 | |
505 | /* A struct for an entry in the SOM import list */ | |
c5aa993b JM |
506 | typedef struct |
507 | { | |
508 | int name; /* index into the string table */ | |
509 | short dont_care1; /* we don't use this */ | |
510 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
511 | unsigned int reserved2:8; /* not used */ | |
512 | } | |
513 | SomImportEntry; | |
514 | ||
515 | /* We read 100 entries in at a time from the disk file. */ | |
516 | #define SOM_READ_IMPORTS_NUM 100 | |
517 | #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) | |
c906108c | 518 | SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
c5aa993b | 519 | |
c906108c SS |
520 | /* Initialize in case we error out */ |
521 | objfile->import_list = NULL; | |
522 | objfile->import_list_size = 0; | |
523 | ||
c906108c | 524 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 525 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
526 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
527 | if (!text_section) | |
528 | return 0; | |
c5aa993b | 529 | /* Get the SOM executable header */ |
c906108c SS |
530 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
531 | ||
532 | /* Check header version number for 10.x HP-UX */ | |
533 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 534 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
535 | if (dl_header[0] != 93092112) |
536 | return 0; | |
c5aa993b JM |
537 | |
538 | import_list = dl_header[4]; | |
c906108c SS |
539 | import_list_size = dl_header[5]; |
540 | if (!import_list_size) | |
541 | return 0; | |
c5aa993b | 542 | string_table = dl_header[10]; |
c906108c SS |
543 | string_table_size = dl_header[11]; |
544 | if (!string_table_size) | |
545 | return 0; | |
546 | ||
c5aa993b | 547 | /* Suck in SOM string table */ |
c906108c SS |
548 | string_buffer = (char *) xmalloc (string_table_size); |
549 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 550 | string_table, string_table_size); |
c906108c SS |
551 | |
552 | /* Allocate import list in the psymbol obstack; this has nothing | |
553 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 554 | import list to be freed when the objfile is deallocated */ |
c906108c SS |
555 | objfile->import_list |
556 | = (ImportEntry *) obstack_alloc (&objfile->psymbol_obstack, | |
c5aa993b | 557 | import_list_size * sizeof (ImportEntry)); |
c906108c | 558 | |
c5aa993b JM |
559 | /* Read in the import entries, a bunch at a time */ |
560 | for (j = 0, k = 0; | |
c906108c SS |
561 | j < (import_list_size / SOM_READ_IMPORTS_NUM); |
562 | j++) | |
563 | { | |
564 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
565 | import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
566 | SOM_READ_IMPORTS_CHUNK_SIZE); | |
567 | for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) | |
568 | { | |
569 | if (buffer[i].type != (unsigned char) 0) | |
570 | { | |
571 | objfile->import_list[k] | |
572 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
573 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
574 | /* Some day we might want to record the type and other information too */ | |
575 | } | |
576 | else /* null type */ | |
577 | objfile->import_list[k] = NULL; | |
578 | ||
579 | } | |
c906108c SS |
580 | } |
581 | ||
c5aa993b | 582 | /* Get the leftovers */ |
c906108c SS |
583 | if (k < import_list_size) |
584 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
585 | import_list + k * sizeof (SomImportEntry), |
586 | (import_list_size - k) * sizeof (SomImportEntry)); | |
587 | for (i = 0; k < import_list_size; i++, k++) | |
c906108c SS |
588 | { |
589 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
590 | { |
591 | objfile->import_list[k] | |
592 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
593 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
594 | /* Some day we might want to record the type and other information too */ | |
595 | } | |
c906108c | 596 | else |
c5aa993b | 597 | objfile->import_list[k] = NULL; |
c906108c SS |
598 | } |
599 | ||
600 | objfile->import_list_size = import_list_size; | |
b8c9b27d | 601 | xfree (string_buffer); |
c906108c SS |
602 | return import_list_size; |
603 | } | |
604 | ||
605 | /* Read in and initialize the SOM export list which is present | |
606 | for all executables and shared libraries. The import list | |
607 | consists of the symbols that are referenced in OBJFILE but | |
608 | not defined there. (Variables that are imported are dealt | |
609 | with as "loc_indirect" vars.) | |
610 | Return value = number of import symbols read in. */ | |
611 | int | |
fba45db2 | 612 | init_export_symbols (struct objfile *objfile) |
c906108c SS |
613 | { |
614 | unsigned int export_list; | |
615 | unsigned int export_list_size; | |
616 | unsigned int string_table; | |
617 | unsigned int string_table_size; | |
c5aa993b | 618 | char *string_buffer; |
c906108c SS |
619 | register int i; |
620 | register int j; | |
621 | register int k; | |
c5aa993b JM |
622 | asection *text_section; /* section handle */ |
623 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
624 | |
625 | /* A struct for an entry in the SOM export list */ | |
c5aa993b JM |
626 | typedef struct |
627 | { | |
628 | int next; /* for hash table use -- we don't use this */ | |
629 | int name; /* index into string table */ | |
630 | int value; /* offset or plabel */ | |
631 | int dont_care1; /* not used */ | |
632 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
633 | char dont_care2; /* not used */ | |
634 | short dont_care3; /* not used */ | |
635 | } | |
636 | SomExportEntry; | |
637 | ||
638 | /* We read 100 entries in at a time from the disk file. */ | |
639 | #define SOM_READ_EXPORTS_NUM 100 | |
640 | #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) | |
c906108c SS |
641 | SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
642 | ||
643 | /* Initialize in case we error out */ | |
644 | objfile->export_list = NULL; | |
645 | objfile->export_list_size = 0; | |
646 | ||
c906108c | 647 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 648 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
649 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
650 | if (!text_section) | |
651 | return 0; | |
c5aa993b | 652 | /* Get the SOM executable header */ |
c906108c SS |
653 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
654 | ||
655 | /* Check header version number for 10.x HP-UX */ | |
656 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 657 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
658 | if (dl_header[0] != 93092112) |
659 | return 0; | |
c5aa993b JM |
660 | |
661 | export_list = dl_header[8]; | |
662 | export_list_size = dl_header[9]; | |
c906108c SS |
663 | if (!export_list_size) |
664 | return 0; | |
c5aa993b | 665 | string_table = dl_header[10]; |
c906108c SS |
666 | string_table_size = dl_header[11]; |
667 | if (!string_table_size) | |
668 | return 0; | |
669 | ||
c5aa993b | 670 | /* Suck in SOM string table */ |
c906108c SS |
671 | string_buffer = (char *) xmalloc (string_table_size); |
672 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 673 | string_table, string_table_size); |
c906108c SS |
674 | |
675 | /* Allocate export list in the psymbol obstack; this has nothing | |
676 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 677 | export list to be freed when the objfile is deallocated */ |
c906108c | 678 | objfile->export_list |
c5aa993b JM |
679 | = (ExportEntry *) obstack_alloc (&objfile->psymbol_obstack, |
680 | export_list_size * sizeof (ExportEntry)); | |
c906108c | 681 | |
c5aa993b JM |
682 | /* Read in the export entries, a bunch at a time */ |
683 | for (j = 0, k = 0; | |
c906108c SS |
684 | j < (export_list_size / SOM_READ_EXPORTS_NUM); |
685 | j++) | |
686 | { | |
687 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
688 | export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
689 | SOM_READ_EXPORTS_CHUNK_SIZE); | |
690 | for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) | |
691 | { | |
692 | if (buffer[i].type != (unsigned char) 0) | |
693 | { | |
694 | objfile->export_list[k].name | |
695 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
696 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
697 | objfile->export_list[k].address = buffer[i].value; | |
698 | /* Some day we might want to record the type and other information too */ | |
699 | } | |
700 | else | |
701 | /* null type */ | |
702 | { | |
703 | objfile->export_list[k].name = NULL; | |
704 | objfile->export_list[k].address = 0; | |
705 | } | |
706 | } | |
c906108c SS |
707 | } |
708 | ||
c5aa993b | 709 | /* Get the leftovers */ |
c906108c SS |
710 | if (k < export_list_size) |
711 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
712 | export_list + k * sizeof (SomExportEntry), |
713 | (export_list_size - k) * sizeof (SomExportEntry)); | |
714 | for (i = 0; k < export_list_size; i++, k++) | |
c906108c SS |
715 | { |
716 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
717 | { |
718 | objfile->export_list[k].name | |
719 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
720 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
721 | /* Some day we might want to record the type and other information too */ | |
722 | objfile->export_list[k].address = buffer[i].value; | |
723 | } | |
c906108c | 724 | else |
c5aa993b JM |
725 | { |
726 | objfile->export_list[k].name = NULL; | |
727 | objfile->export_list[k].address = 0; | |
728 | } | |
c906108c SS |
729 | } |
730 | ||
731 | objfile->export_list_size = export_list_size; | |
b8c9b27d | 732 | xfree (string_buffer); |
c906108c SS |
733 | return export_list_size; |
734 | } | |
c5aa993b | 735 | \f |
c906108c SS |
736 | |
737 | ||
c906108c SS |
738 | /* Register that we are able to handle SOM object file formats. */ |
739 | ||
740 | static struct sym_fns som_sym_fns = | |
741 | { | |
742 | bfd_target_som_flavour, | |
c5aa993b JM |
743 | som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
744 | som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
745 | som_symfile_read, /* sym_read: read a symbol file into symtab */ | |
746 | som_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
747 | som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ | |
748 | NULL /* next: pointer to next struct sym_fns */ | |
c906108c SS |
749 | }; |
750 | ||
751 | void | |
fba45db2 | 752 | _initialize_somread (void) |
c906108c SS |
753 | { |
754 | add_symtab_fns (&som_sym_fns); | |
755 | } |