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 | ||
34c0bd93 | 102 | /* FIXME (alloca): could be quite large. */ |
c906108c SS |
103 | buf = alloca (symsize * number_of_symbols); |
104 | bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); | |
3a42e9d0 | 105 | val = bfd_bread (buf, symsize * number_of_symbols, abfd); |
c906108c SS |
106 | if (val != symsize * number_of_symbols) |
107 | error ("Couldn't read symbol dictionary!"); | |
108 | ||
34c0bd93 | 109 | /* FIXME (alloca): could be quite large. */ |
c906108c SS |
110 | stringtab = alloca (obj_som_stringtab_size (abfd)); |
111 | bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); | |
3a42e9d0 | 112 | val = bfd_bread (stringtab, obj_som_stringtab_size (abfd), abfd); |
c906108c SS |
113 | if (val != obj_som_stringtab_size (abfd)) |
114 | error ("Can't read in HP string table."); | |
115 | ||
116 | /* We need to determine if objfile is a dynamic executable (so we | |
117 | can do the right thing for ST_ENTRY vs ST_CODE symbols). | |
118 | ||
119 | There's nothing in the header which easily allows us to do | |
120 | this. The only reliable way I know of is to check for the | |
8e1a459b | 121 | existence of a $SHLIB_INFO$ section with a non-zero size. */ |
c906108c SS |
122 | /* The code below is not a reliable way to check whether an |
123 | * executable is dynamic, so I commented it out - RT | |
124 | * shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); | |
125 | * if (shlib_info) | |
126 | * dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0); | |
127 | * else | |
128 | * dynamic = 0; | |
129 | */ | |
130 | /* I replaced the code with a simple check for text offset not being | |
131 | * zero. Still not 100% reliable, but a more reliable way of asking | |
132 | * "is this a dynamic executable?" than the above. RT | |
133 | */ | |
134 | dynamic = (text_offset != 0); | |
135 | ||
136 | endbufp = buf + number_of_symbols; | |
137 | for (bufp = buf; bufp < endbufp; ++bufp) | |
138 | { | |
139 | enum minimal_symbol_type ms_type; | |
140 | ||
141 | QUIT; | |
142 | ||
143 | switch (bufp->symbol_scope) | |
144 | { | |
145 | case SS_UNIVERSAL: | |
146 | case SS_EXTERNAL: | |
147 | switch (bufp->symbol_type) | |
148 | { | |
149 | case ST_SYM_EXT: | |
150 | case ST_ARG_EXT: | |
151 | continue; | |
152 | ||
153 | case ST_CODE: | |
154 | case ST_PRI_PROG: | |
155 | case ST_SEC_PROG: | |
156 | case ST_MILLICODE: | |
157 | symname = bufp->name.n_strx + stringtab; | |
158 | ms_type = mst_text; | |
159 | bufp->symbol_value += text_offset; | |
160 | #ifdef SMASH_TEXT_ADDRESS | |
161 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
162 | #endif | |
163 | break; | |
164 | ||
165 | case ST_ENTRY: | |
166 | symname = bufp->name.n_strx + stringtab; | |
167 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
168 | the stubs, while the ST_CODE symbol is the real |
169 | function. */ | |
c906108c SS |
170 | if (dynamic) |
171 | ms_type = mst_solib_trampoline; | |
172 | else | |
173 | ms_type = mst_text; | |
174 | bufp->symbol_value += text_offset; | |
175 | #ifdef SMASH_TEXT_ADDRESS | |
176 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
177 | #endif | |
178 | break; | |
179 | ||
180 | case ST_STUB: | |
181 | symname = bufp->name.n_strx + stringtab; | |
182 | ms_type = mst_solib_trampoline; | |
183 | bufp->symbol_value += text_offset; | |
184 | #ifdef SMASH_TEXT_ADDRESS | |
185 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
186 | #endif | |
187 | break; | |
188 | ||
189 | case ST_DATA: | |
190 | symname = bufp->name.n_strx + stringtab; | |
191 | bufp->symbol_value += data_offset; | |
192 | ms_type = mst_data; | |
193 | break; | |
194 | default: | |
195 | continue; | |
196 | } | |
197 | break; | |
198 | ||
199 | #if 0 | |
200 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ | |
201 | case SS_GLOBAL: | |
202 | #endif | |
203 | case SS_LOCAL: | |
204 | switch (bufp->symbol_type) | |
205 | { | |
206 | case ST_SYM_EXT: | |
207 | case ST_ARG_EXT: | |
208 | continue; | |
209 | ||
210 | case ST_CODE: | |
211 | symname = bufp->name.n_strx + stringtab; | |
212 | ms_type = mst_file_text; | |
213 | bufp->symbol_value += text_offset; | |
214 | #ifdef SMASH_TEXT_ADDRESS | |
215 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
216 | #endif | |
217 | ||
218 | check_strange_names: | |
219 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local | |
c5aa993b JM |
220 | label prefixes for stabs, constant data, etc. So we need |
221 | only filter out L$ symbols which are left in due to | |
222 | limitations in how GAS generates SOM relocations. | |
223 | ||
224 | When linking in the HPUX C-library the HP linker has | |
225 | the nasty habit of placing section symbols from the literal | |
226 | subspaces in the middle of the program's text. Filter | |
227 | those out as best we can. Check for first and last character | |
228 | being '$'. | |
229 | ||
230 | And finally, the newer HP compilers emit crud like $PIC_foo$N | |
231 | in some circumstance (PIC code I guess). It's also claimed | |
232 | that they emit D$ symbols too. What stupidity. */ | |
c906108c | 233 | if ((symname[0] == 'L' && symname[1] == '$') |
c5aa993b | 234 | || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
c906108c SS |
235 | || (symname[0] == 'D' && symname[1] == '$') |
236 | || (strncmp (symname, "$PIC", 4) == 0)) | |
237 | continue; | |
238 | break; | |
239 | ||
240 | case ST_PRI_PROG: | |
241 | case ST_SEC_PROG: | |
242 | case ST_MILLICODE: | |
243 | symname = bufp->name.n_strx + stringtab; | |
244 | ms_type = mst_file_text; | |
245 | bufp->symbol_value += text_offset; | |
246 | #ifdef SMASH_TEXT_ADDRESS | |
247 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
248 | #endif | |
249 | break; | |
250 | ||
251 | case ST_ENTRY: | |
252 | symname = bufp->name.n_strx + stringtab; | |
253 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
254 | the stubs, while the ST_CODE symbol is the real |
255 | function. */ | |
c906108c SS |
256 | if (dynamic) |
257 | ms_type = mst_solib_trampoline; | |
258 | else | |
259 | ms_type = mst_file_text; | |
260 | bufp->symbol_value += text_offset; | |
261 | #ifdef SMASH_TEXT_ADDRESS | |
262 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
263 | #endif | |
264 | break; | |
265 | ||
266 | case ST_STUB: | |
267 | symname = bufp->name.n_strx + stringtab; | |
268 | ms_type = mst_solib_trampoline; | |
269 | bufp->symbol_value += text_offset; | |
270 | #ifdef SMASH_TEXT_ADDRESS | |
271 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
272 | #endif | |
273 | break; | |
274 | ||
275 | ||
276 | case ST_DATA: | |
277 | symname = bufp->name.n_strx + stringtab; | |
278 | bufp->symbol_value += data_offset; | |
279 | ms_type = mst_file_data; | |
280 | goto check_strange_names; | |
281 | ||
282 | default: | |
283 | continue; | |
284 | } | |
285 | break; | |
286 | ||
c5aa993b JM |
287 | /* This can happen for common symbols when -E is passed to the |
288 | final link. No idea _why_ that would make the linker force | |
289 | common symbols to have an SS_UNSAT scope, but it does. | |
c906108c | 290 | |
c5aa993b JM |
291 | This also happens for weak symbols, but their type is |
292 | ST_DATA. */ | |
c906108c SS |
293 | case SS_UNSAT: |
294 | switch (bufp->symbol_type) | |
295 | { | |
c5aa993b JM |
296 | case ST_STORAGE: |
297 | case ST_DATA: | |
298 | symname = bufp->name.n_strx + stringtab; | |
299 | bufp->symbol_value += data_offset; | |
300 | ms_type = mst_data; | |
301 | break; | |
302 | ||
303 | default: | |
304 | continue; | |
c906108c SS |
305 | } |
306 | break; | |
307 | ||
308 | default: | |
309 | continue; | |
310 | } | |
311 | ||
312 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) | |
313 | error ("Invalid symbol data; bad HP string table offset: %d", | |
314 | bufp->name.n_strx); | |
315 | ||
c5aa993b | 316 | prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
c906108c SS |
317 | objfile); |
318 | } | |
319 | } | |
320 | ||
321 | /* Scan and build partial symbols for a symbol file. | |
322 | We have been initialized by a call to som_symfile_init, which | |
323 | currently does nothing. | |
324 | ||
325 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
326 | in each section. This is ignored, as it isn't needed for SOM. | |
327 | ||
328 | MAINLINE is true if we are reading the main symbol | |
329 | table (as opposed to a shared lib or dynamically loaded file). | |
330 | ||
331 | This function only does the minimum work necessary for letting the | |
332 | user "name" things symbolically; it does not read the entire symtab. | |
333 | Instead, it reads the external and static symbols and puts them in partial | |
334 | symbol tables. When more extensive information is requested of a | |
335 | file, the corresponding partial symbol table is mutated into a full | |
336 | fledged symbol table by going back and reading the symbols | |
337 | for real. | |
338 | ||
339 | We look for sections with specific names, to tell us what debug | |
340 | format to look for: FIXME!!! | |
341 | ||
342 | somstab_build_psymtabs() handles STABS symbols. | |
343 | ||
344 | Note that SOM files have a "minimal" symbol table, which is vaguely | |
345 | reminiscent of a COFF symbol table, but has only the minimal information | |
346 | necessary for linking. We process this also, and use the information to | |
347 | build gdb's minimal symbol table. This gives us some minimal debugging | |
348 | capability even for files compiled without -g. */ | |
349 | ||
350 | static void | |
fba45db2 | 351 | som_symfile_read (struct objfile *objfile, int mainline) |
c906108c SS |
352 | { |
353 | bfd *abfd = objfile->obfd; | |
354 | struct cleanup *back_to; | |
355 | ||
356 | do_pxdb (symfile_bfd_open (objfile->name)); | |
357 | ||
358 | init_minimal_symbol_collection (); | |
56e290f4 | 359 | back_to = make_cleanup_discard_minimal_symbols (); |
c906108c SS |
360 | |
361 | /* Read in the import list and the export list. Currently | |
362 | the export list isn't used; the import list is used in | |
363 | hp-symtab-read.c to handle static vars declared in other | |
364 | shared libraries. */ | |
365 | init_import_symbols (objfile); | |
c5aa993b | 366 | #if 0 /* Export symbols not used today 1997-08-05 */ |
c906108c SS |
367 | init_export_symbols (objfile); |
368 | #else | |
369 | objfile->export_list = NULL; | |
370 | objfile->export_list_size = 0; | |
371 | #endif | |
372 | ||
373 | /* Process the normal SOM symbol table first. | |
374 | This reads in the DNTT and string table, but doesn't | |
375 | actually scan the DNTT. It does scan the linker symbol | |
376 | table and thus build up a "minimal symbol table". */ | |
c5aa993b | 377 | |
96baa820 | 378 | som_symtab_read (abfd, objfile, objfile->section_offsets); |
c906108c SS |
379 | |
380 | /* Now read information from the stabs debug sections. | |
381 | This is a no-op for SOM. | |
382 | Perhaps it is intended for some kind of mixed STABS/SOM | |
c5aa993b | 383 | situation? */ |
96baa820 | 384 | stabsect_build_psymtabs (objfile, mainline, |
c906108c SS |
385 | "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
386 | ||
387 | /* Now read the native debug information. | |
388 | This builds the psymtab. This used to be done via a scan of | |
389 | the DNTT, but is now done via the PXDB-built quick-lookup tables | |
390 | together with a scan of the GNTT. See hp-psymtab-read.c. */ | |
d4f3574e | 391 | hpread_build_psymtabs (objfile, mainline); |
c906108c SS |
392 | |
393 | /* Install any minimal symbols that have been collected as the current | |
394 | minimal symbols for this objfile. | |
395 | Further symbol-reading is done incrementally, file-by-file, | |
396 | in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c | |
397 | contains the code to do the actual DNTT scanning and symtab building. */ | |
398 | install_minimal_symbols (objfile); | |
399 | ||
400 | /* Force hppa-tdep.c to re-read the unwind descriptors. */ | |
401 | objfile->obj_private = NULL; | |
402 | do_cleanups (back_to); | |
403 | } | |
404 | ||
405 | /* Initialize anything that needs initializing when a completely new symbol | |
406 | file is specified (not just adding some symbols from another file, e.g. a | |
407 | shared library). | |
408 | ||
409 | We reinitialize buildsym, since we may be reading stabs from a SOM file. */ | |
410 | ||
411 | static void | |
fba45db2 | 412 | som_new_init (struct objfile *ignore) |
c906108c SS |
413 | { |
414 | stabsread_new_init (); | |
415 | buildsym_new_init (); | |
416 | } | |
417 | ||
418 | /* Perform any local cleanups required when we are done with a particular | |
419 | objfile. I.E, we are in the process of discarding all symbol information | |
420 | for an objfile, freeing up all memory held for it, and unlinking the | |
421 | objfile struct from the global list of known objfiles. */ | |
422 | ||
423 | static void | |
fba45db2 | 424 | som_symfile_finish (struct objfile *objfile) |
c906108c | 425 | { |
c5aa993b | 426 | if (objfile->sym_stab_info != NULL) |
c906108c | 427 | { |
aac7f4ea | 428 | xmfree (objfile->md, objfile->sym_stab_info); |
c906108c SS |
429 | } |
430 | hpread_symfile_finish (objfile); | |
431 | } | |
432 | ||
433 | /* SOM specific initialization routine for reading symbols. */ | |
434 | ||
435 | static void | |
fba45db2 | 436 | som_symfile_init (struct objfile *objfile) |
c906108c SS |
437 | { |
438 | /* SOM objects may be reordered, so set OBJF_REORDERED. If we | |
439 | find this causes a significant slowdown in gdb then we could | |
440 | set it in the debug symbol readers only when necessary. */ | |
441 | objfile->flags |= OBJF_REORDERED; | |
442 | hpread_symfile_init (objfile); | |
443 | } | |
444 | ||
445 | /* SOM specific parsing routine for section offsets. | |
446 | ||
447 | Plain and simple for now. */ | |
448 | ||
d4f3574e | 449 | static void |
fba45db2 | 450 | som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
c906108c | 451 | { |
c906108c | 452 | int i; |
0aa9cf96 | 453 | CORE_ADDR text_addr; |
c906108c SS |
454 | |
455 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 456 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 457 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
c906108c | 458 | |
b8fbeb18 EZ |
459 | /* FIXME: ezannoni 2000-04-20 The section names in SOM are not |
460 | .text, .data, etc, but $TEXT$, $DATA$,... We should initialize | |
461 | SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't | |
462 | know the correspondence between SOM sections and GDB's idea of | |
463 | section names. So for now we default to what is was before these | |
464 | changes.*/ | |
465 | objfile->sect_index_text = 0; | |
466 | objfile->sect_index_data = 1; | |
467 | objfile->sect_index_bss = 2; | |
468 | objfile->sect_index_rodata = 3; | |
469 | ||
c906108c | 470 | /* First see if we're a shared library. If so, get the section |
2acceee2 | 471 | offsets from the library, else get them from addrs. */ |
d4f3574e | 472 | if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
c906108c | 473 | { |
b8fbeb18 EZ |
474 | /* Note: Here is OK to compare with ".text" because this is the |
475 | name that gdb itself gives to that section, not the SOM | |
476 | name. */ | |
0aa9cf96 EZ |
477 | for (i = 0; i < SECT_OFF_MAX && addrs->other[i].name; i++) |
478 | if (strcmp (addrs->other[i].name, ".text") == 0) | |
479 | break; | |
480 | text_addr = addrs->other[i].addr; | |
481 | ||
c906108c | 482 | for (i = 0; i < SECT_OFF_MAX; i++) |
f0a58b0b | 483 | (objfile->section_offsets)->offsets[i] = text_addr; |
c906108c | 484 | } |
c906108c SS |
485 | } |
486 | ||
c906108c SS |
487 | /* Read in and initialize the SOM import list which is present |
488 | for all executables and shared libraries. The import list | |
489 | consists of the symbols that are referenced in OBJFILE but | |
490 | not defined there. (Variables that are imported are dealt | |
491 | with as "loc_indirect" vars.) | |
492 | Return value = number of import symbols read in. */ | |
493 | int | |
fba45db2 | 494 | init_import_symbols (struct objfile *objfile) |
c906108c SS |
495 | { |
496 | unsigned int import_list; | |
497 | unsigned int import_list_size; | |
498 | unsigned int string_table; | |
499 | unsigned int string_table_size; | |
c5aa993b | 500 | char *string_buffer; |
c906108c SS |
501 | register int i; |
502 | register int j; | |
503 | register int k; | |
c5aa993b JM |
504 | asection *text_section; /* section handle */ |
505 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
506 | |
507 | /* A struct for an entry in the SOM import list */ | |
c5aa993b JM |
508 | typedef struct |
509 | { | |
510 | int name; /* index into the string table */ | |
511 | short dont_care1; /* we don't use this */ | |
512 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
513 | unsigned int reserved2:8; /* not used */ | |
514 | } | |
515 | SomImportEntry; | |
516 | ||
517 | /* We read 100 entries in at a time from the disk file. */ | |
518 | #define SOM_READ_IMPORTS_NUM 100 | |
519 | #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) | |
c906108c | 520 | SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
c5aa993b | 521 | |
c906108c SS |
522 | /* Initialize in case we error out */ |
523 | objfile->import_list = NULL; | |
524 | objfile->import_list_size = 0; | |
525 | ||
c906108c | 526 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 527 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
528 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
529 | if (!text_section) | |
530 | return 0; | |
c5aa993b | 531 | /* Get the SOM executable header */ |
c906108c SS |
532 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
533 | ||
534 | /* Check header version number for 10.x HP-UX */ | |
535 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 536 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
537 | if (dl_header[0] != 93092112) |
538 | return 0; | |
c5aa993b JM |
539 | |
540 | import_list = dl_header[4]; | |
c906108c SS |
541 | import_list_size = dl_header[5]; |
542 | if (!import_list_size) | |
543 | return 0; | |
c5aa993b | 544 | string_table = dl_header[10]; |
c906108c SS |
545 | string_table_size = dl_header[11]; |
546 | if (!string_table_size) | |
547 | return 0; | |
548 | ||
c5aa993b | 549 | /* Suck in SOM string table */ |
c906108c SS |
550 | string_buffer = (char *) xmalloc (string_table_size); |
551 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 552 | string_table, string_table_size); |
c906108c SS |
553 | |
554 | /* Allocate import list in the psymbol obstack; this has nothing | |
555 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 556 | import list to be freed when the objfile is deallocated */ |
c906108c SS |
557 | objfile->import_list |
558 | = (ImportEntry *) obstack_alloc (&objfile->psymbol_obstack, | |
c5aa993b | 559 | import_list_size * sizeof (ImportEntry)); |
c906108c | 560 | |
c5aa993b JM |
561 | /* Read in the import entries, a bunch at a time */ |
562 | for (j = 0, k = 0; | |
c906108c SS |
563 | j < (import_list_size / SOM_READ_IMPORTS_NUM); |
564 | j++) | |
565 | { | |
566 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
567 | import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
568 | SOM_READ_IMPORTS_CHUNK_SIZE); | |
569 | for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) | |
570 | { | |
571 | if (buffer[i].type != (unsigned char) 0) | |
572 | { | |
573 | objfile->import_list[k] | |
574 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
575 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
576 | /* Some day we might want to record the type and other information too */ | |
577 | } | |
578 | else /* null type */ | |
579 | objfile->import_list[k] = NULL; | |
580 | ||
581 | } | |
c906108c SS |
582 | } |
583 | ||
c5aa993b | 584 | /* Get the leftovers */ |
c906108c SS |
585 | if (k < import_list_size) |
586 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
587 | import_list + k * sizeof (SomImportEntry), |
588 | (import_list_size - k) * sizeof (SomImportEntry)); | |
589 | for (i = 0; k < import_list_size; i++, k++) | |
c906108c SS |
590 | { |
591 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
592 | { |
593 | objfile->import_list[k] | |
594 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
595 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
596 | /* Some day we might want to record the type and other information too */ | |
597 | } | |
c906108c | 598 | else |
c5aa993b | 599 | objfile->import_list[k] = NULL; |
c906108c SS |
600 | } |
601 | ||
602 | objfile->import_list_size = import_list_size; | |
b8c9b27d | 603 | xfree (string_buffer); |
c906108c SS |
604 | return import_list_size; |
605 | } | |
606 | ||
607 | /* Read in and initialize the SOM export list which is present | |
608 | for all executables and shared libraries. The import list | |
609 | consists of the symbols that are referenced in OBJFILE but | |
610 | not defined there. (Variables that are imported are dealt | |
611 | with as "loc_indirect" vars.) | |
612 | Return value = number of import symbols read in. */ | |
613 | int | |
fba45db2 | 614 | init_export_symbols (struct objfile *objfile) |
c906108c SS |
615 | { |
616 | unsigned int export_list; | |
617 | unsigned int export_list_size; | |
618 | unsigned int string_table; | |
619 | unsigned int string_table_size; | |
c5aa993b | 620 | char *string_buffer; |
c906108c SS |
621 | register int i; |
622 | register int j; | |
623 | register int k; | |
c5aa993b JM |
624 | asection *text_section; /* section handle */ |
625 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
626 | |
627 | /* A struct for an entry in the SOM export list */ | |
c5aa993b JM |
628 | typedef struct |
629 | { | |
630 | int next; /* for hash table use -- we don't use this */ | |
631 | int name; /* index into string table */ | |
632 | int value; /* offset or plabel */ | |
633 | int dont_care1; /* not used */ | |
634 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
635 | char dont_care2; /* not used */ | |
636 | short dont_care3; /* not used */ | |
637 | } | |
638 | SomExportEntry; | |
639 | ||
640 | /* We read 100 entries in at a time from the disk file. */ | |
641 | #define SOM_READ_EXPORTS_NUM 100 | |
642 | #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) | |
c906108c SS |
643 | SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
644 | ||
645 | /* Initialize in case we error out */ | |
646 | objfile->export_list = NULL; | |
647 | objfile->export_list_size = 0; | |
648 | ||
c906108c | 649 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 650 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
651 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
652 | if (!text_section) | |
653 | return 0; | |
c5aa993b | 654 | /* Get the SOM executable header */ |
c906108c SS |
655 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
656 | ||
657 | /* Check header version number for 10.x HP-UX */ | |
658 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 659 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
660 | if (dl_header[0] != 93092112) |
661 | return 0; | |
c5aa993b JM |
662 | |
663 | export_list = dl_header[8]; | |
664 | export_list_size = dl_header[9]; | |
c906108c SS |
665 | if (!export_list_size) |
666 | return 0; | |
c5aa993b | 667 | string_table = dl_header[10]; |
c906108c SS |
668 | string_table_size = dl_header[11]; |
669 | if (!string_table_size) | |
670 | return 0; | |
671 | ||
c5aa993b | 672 | /* Suck in SOM string table */ |
c906108c SS |
673 | string_buffer = (char *) xmalloc (string_table_size); |
674 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 675 | string_table, string_table_size); |
c906108c SS |
676 | |
677 | /* Allocate export list in the psymbol obstack; this has nothing | |
678 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 679 | export list to be freed when the objfile is deallocated */ |
c906108c | 680 | objfile->export_list |
c5aa993b JM |
681 | = (ExportEntry *) obstack_alloc (&objfile->psymbol_obstack, |
682 | export_list_size * sizeof (ExportEntry)); | |
c906108c | 683 | |
c5aa993b JM |
684 | /* Read in the export entries, a bunch at a time */ |
685 | for (j = 0, k = 0; | |
c906108c SS |
686 | j < (export_list_size / SOM_READ_EXPORTS_NUM); |
687 | j++) | |
688 | { | |
689 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
690 | export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
691 | SOM_READ_EXPORTS_CHUNK_SIZE); | |
692 | for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) | |
693 | { | |
694 | if (buffer[i].type != (unsigned char) 0) | |
695 | { | |
696 | objfile->export_list[k].name | |
697 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
698 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
699 | objfile->export_list[k].address = buffer[i].value; | |
700 | /* Some day we might want to record the type and other information too */ | |
701 | } | |
702 | else | |
703 | /* null type */ | |
704 | { | |
705 | objfile->export_list[k].name = NULL; | |
706 | objfile->export_list[k].address = 0; | |
707 | } | |
708 | } | |
c906108c SS |
709 | } |
710 | ||
c5aa993b | 711 | /* Get the leftovers */ |
c906108c SS |
712 | if (k < export_list_size) |
713 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
714 | export_list + k * sizeof (SomExportEntry), |
715 | (export_list_size - k) * sizeof (SomExportEntry)); | |
716 | for (i = 0; k < export_list_size; i++, k++) | |
c906108c SS |
717 | { |
718 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
719 | { |
720 | objfile->export_list[k].name | |
721 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
722 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
723 | /* Some day we might want to record the type and other information too */ | |
724 | objfile->export_list[k].address = buffer[i].value; | |
725 | } | |
c906108c | 726 | else |
c5aa993b JM |
727 | { |
728 | objfile->export_list[k].name = NULL; | |
729 | objfile->export_list[k].address = 0; | |
730 | } | |
c906108c SS |
731 | } |
732 | ||
733 | objfile->export_list_size = export_list_size; | |
b8c9b27d | 734 | xfree (string_buffer); |
c906108c SS |
735 | return export_list_size; |
736 | } | |
c5aa993b | 737 | \f |
c906108c SS |
738 | |
739 | ||
c906108c SS |
740 | /* Register that we are able to handle SOM object file formats. */ |
741 | ||
742 | static struct sym_fns som_sym_fns = | |
743 | { | |
744 | bfd_target_som_flavour, | |
c5aa993b JM |
745 | som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
746 | som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
747 | som_symfile_read, /* sym_read: read a symbol file into symtab */ | |
748 | som_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
749 | som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ | |
750 | NULL /* next: pointer to next struct sym_fns */ | |
c906108c SS |
751 | }; |
752 | ||
753 | void | |
fba45db2 | 754 | _initialize_somread (void) |
c906108c SS |
755 | { |
756 | add_symtab_fns (&som_sym_fns); | |
757 | } |