Commit | Line | Data |
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c906108c | 1 | /* Read HP PA/Risc object files for GDB. |
cce74817 | 2 | Copyright 1991, 1992, 1996, 1999 Free Software Foundation, Inc. |
c906108c SS |
3 | Written by Fred Fish at Cygnus Support. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "bfd.h" | |
24 | #include <syms.h> | |
25 | #include "symtab.h" | |
26 | #include "symfile.h" | |
27 | #include "objfiles.h" | |
28 | #include "buildsym.h" | |
29 | #include "stabsread.h" | |
30 | #include "gdb-stabs.h" | |
31 | #include "complaints.h" | |
32 | #include "gdb_string.h" | |
33 | #include "demangle.h" | |
34 | #include "som.h" | |
35 | #include "libhppa.h" | |
36 | ||
37 | /* Various things we might complain about... */ | |
38 | ||
a14ed312 | 39 | static void som_symfile_init (struct objfile *); |
c906108c | 40 | |
a14ed312 | 41 | static void som_new_init (struct objfile *); |
c906108c | 42 | |
a14ed312 | 43 | static void som_symfile_read (struct objfile *, int); |
c906108c | 44 | |
a14ed312 | 45 | static void som_symfile_finish (struct objfile *); |
c906108c SS |
46 | |
47 | static void | |
a14ed312 | 48 | som_symtab_read (bfd *, struct objfile *, struct section_offsets *); |
c906108c | 49 | |
d4f3574e | 50 | static void |
a14ed312 | 51 | som_symfile_offsets (struct objfile *, struct section_addr_info *); |
c906108c SS |
52 | |
53 | /* FIXME: These should really be in a common header somewhere */ | |
54 | ||
a14ed312 | 55 | extern void hpread_build_psymtabs (struct objfile *, int); |
c906108c | 56 | |
a14ed312 | 57 | extern void hpread_symfile_finish (struct objfile *); |
c906108c | 58 | |
a14ed312 | 59 | extern void hpread_symfile_init (struct objfile *); |
c906108c | 60 | |
a14ed312 | 61 | extern void do_pxdb (bfd *); |
c906108c SS |
62 | |
63 | /* | |
64 | ||
c5aa993b | 65 | LOCAL FUNCTION |
c906108c | 66 | |
c5aa993b | 67 | som_symtab_read -- read the symbol table of a SOM file |
c906108c | 68 | |
c5aa993b | 69 | SYNOPSIS |
c906108c | 70 | |
c5aa993b JM |
71 | void som_symtab_read (bfd *abfd, struct objfile *objfile, |
72 | struct section_offsets *section_offsets) | |
c906108c | 73 | |
c5aa993b | 74 | DESCRIPTION |
c906108c | 75 | |
c5aa993b JM |
76 | Given an open bfd, a base address to relocate symbols to, and a |
77 | flag that specifies whether or not this bfd is for an executable | |
78 | or not (may be shared library for example), add all the global | |
79 | function and data symbols to the minimal symbol table. | |
80 | */ | |
c906108c SS |
81 | |
82 | static void | |
fba45db2 KB |
83 | som_symtab_read (bfd *abfd, struct objfile *objfile, |
84 | struct section_offsets *section_offsets) | |
c906108c SS |
85 | { |
86 | unsigned int number_of_symbols; | |
87 | int val, dynamic; | |
88 | char *stringtab; | |
89 | asection *shlib_info; | |
90 | struct symbol_dictionary_record *buf, *bufp, *endbufp; | |
91 | char *symname; | |
92 | CONST int symsize = sizeof (struct symbol_dictionary_record); | |
93 | CORE_ADDR text_offset, data_offset; | |
94 | ||
95 | ||
96 | text_offset = ANOFFSET (section_offsets, 0); | |
97 | data_offset = ANOFFSET (section_offsets, 1); | |
98 | ||
99 | number_of_symbols = bfd_get_symcount (abfd); | |
100 | ||
101 | buf = alloca (symsize * number_of_symbols); | |
102 | bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); | |
103 | val = bfd_read (buf, symsize * number_of_symbols, 1, abfd); | |
104 | if (val != symsize * number_of_symbols) | |
105 | error ("Couldn't read symbol dictionary!"); | |
106 | ||
107 | stringtab = alloca (obj_som_stringtab_size (abfd)); | |
108 | bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); | |
109 | val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd); | |
110 | if (val != obj_som_stringtab_size (abfd)) | |
111 | error ("Can't read in HP string table."); | |
112 | ||
113 | /* We need to determine if objfile is a dynamic executable (so we | |
114 | can do the right thing for ST_ENTRY vs ST_CODE symbols). | |
115 | ||
116 | There's nothing in the header which easily allows us to do | |
117 | this. The only reliable way I know of is to check for the | |
8e1a459b | 118 | existence of a $SHLIB_INFO$ section with a non-zero size. */ |
c906108c SS |
119 | /* The code below is not a reliable way to check whether an |
120 | * executable is dynamic, so I commented it out - RT | |
121 | * shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); | |
122 | * if (shlib_info) | |
123 | * dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0); | |
124 | * else | |
125 | * dynamic = 0; | |
126 | */ | |
127 | /* I replaced the code with a simple check for text offset not being | |
128 | * zero. Still not 100% reliable, but a more reliable way of asking | |
129 | * "is this a dynamic executable?" than the above. RT | |
130 | */ | |
131 | dynamic = (text_offset != 0); | |
132 | ||
133 | endbufp = buf + number_of_symbols; | |
134 | for (bufp = buf; bufp < endbufp; ++bufp) | |
135 | { | |
136 | enum minimal_symbol_type ms_type; | |
137 | ||
138 | QUIT; | |
139 | ||
140 | switch (bufp->symbol_scope) | |
141 | { | |
142 | case SS_UNIVERSAL: | |
143 | case SS_EXTERNAL: | |
144 | switch (bufp->symbol_type) | |
145 | { | |
146 | case ST_SYM_EXT: | |
147 | case ST_ARG_EXT: | |
148 | continue; | |
149 | ||
150 | case ST_CODE: | |
151 | case ST_PRI_PROG: | |
152 | case ST_SEC_PROG: | |
153 | case ST_MILLICODE: | |
154 | symname = bufp->name.n_strx + stringtab; | |
155 | ms_type = mst_text; | |
156 | bufp->symbol_value += text_offset; | |
157 | #ifdef SMASH_TEXT_ADDRESS | |
158 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
159 | #endif | |
160 | break; | |
161 | ||
162 | case ST_ENTRY: | |
163 | symname = bufp->name.n_strx + stringtab; | |
164 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
165 | the stubs, while the ST_CODE symbol is the real |
166 | function. */ | |
c906108c SS |
167 | if (dynamic) |
168 | ms_type = mst_solib_trampoline; | |
169 | else | |
170 | ms_type = mst_text; | |
171 | bufp->symbol_value += text_offset; | |
172 | #ifdef SMASH_TEXT_ADDRESS | |
173 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
174 | #endif | |
175 | break; | |
176 | ||
177 | case ST_STUB: | |
178 | symname = bufp->name.n_strx + stringtab; | |
179 | ms_type = mst_solib_trampoline; | |
180 | bufp->symbol_value += text_offset; | |
181 | #ifdef SMASH_TEXT_ADDRESS | |
182 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
183 | #endif | |
184 | break; | |
185 | ||
186 | case ST_DATA: | |
187 | symname = bufp->name.n_strx + stringtab; | |
188 | bufp->symbol_value += data_offset; | |
189 | ms_type = mst_data; | |
190 | break; | |
191 | default: | |
192 | continue; | |
193 | } | |
194 | break; | |
195 | ||
196 | #if 0 | |
197 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ | |
198 | case SS_GLOBAL: | |
199 | #endif | |
200 | case SS_LOCAL: | |
201 | switch (bufp->symbol_type) | |
202 | { | |
203 | case ST_SYM_EXT: | |
204 | case ST_ARG_EXT: | |
205 | continue; | |
206 | ||
207 | case ST_CODE: | |
208 | symname = bufp->name.n_strx + stringtab; | |
209 | ms_type = mst_file_text; | |
210 | bufp->symbol_value += text_offset; | |
211 | #ifdef SMASH_TEXT_ADDRESS | |
212 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
213 | #endif | |
214 | ||
215 | check_strange_names: | |
216 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local | |
c5aa993b JM |
217 | label prefixes for stabs, constant data, etc. So we need |
218 | only filter out L$ symbols which are left in due to | |
219 | limitations in how GAS generates SOM relocations. | |
220 | ||
221 | When linking in the HPUX C-library the HP linker has | |
222 | the nasty habit of placing section symbols from the literal | |
223 | subspaces in the middle of the program's text. Filter | |
224 | those out as best we can. Check for first and last character | |
225 | being '$'. | |
226 | ||
227 | And finally, the newer HP compilers emit crud like $PIC_foo$N | |
228 | in some circumstance (PIC code I guess). It's also claimed | |
229 | that they emit D$ symbols too. What stupidity. */ | |
c906108c | 230 | if ((symname[0] == 'L' && symname[1] == '$') |
c5aa993b | 231 | || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
c906108c SS |
232 | || (symname[0] == 'D' && symname[1] == '$') |
233 | || (strncmp (symname, "$PIC", 4) == 0)) | |
234 | continue; | |
235 | break; | |
236 | ||
237 | case ST_PRI_PROG: | |
238 | case ST_SEC_PROG: | |
239 | case ST_MILLICODE: | |
240 | symname = bufp->name.n_strx + stringtab; | |
241 | ms_type = mst_file_text; | |
242 | bufp->symbol_value += text_offset; | |
243 | #ifdef SMASH_TEXT_ADDRESS | |
244 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
245 | #endif | |
246 | break; | |
247 | ||
248 | case ST_ENTRY: | |
249 | symname = bufp->name.n_strx + stringtab; | |
250 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
251 | the stubs, while the ST_CODE symbol is the real |
252 | function. */ | |
c906108c SS |
253 | if (dynamic) |
254 | ms_type = mst_solib_trampoline; | |
255 | else | |
256 | ms_type = mst_file_text; | |
257 | bufp->symbol_value += text_offset; | |
258 | #ifdef SMASH_TEXT_ADDRESS | |
259 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
260 | #endif | |
261 | break; | |
262 | ||
263 | case ST_STUB: | |
264 | symname = bufp->name.n_strx + stringtab; | |
265 | ms_type = mst_solib_trampoline; | |
266 | bufp->symbol_value += text_offset; | |
267 | #ifdef SMASH_TEXT_ADDRESS | |
268 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
269 | #endif | |
270 | break; | |
271 | ||
272 | ||
273 | case ST_DATA: | |
274 | symname = bufp->name.n_strx + stringtab; | |
275 | bufp->symbol_value += data_offset; | |
276 | ms_type = mst_file_data; | |
277 | goto check_strange_names; | |
278 | ||
279 | default: | |
280 | continue; | |
281 | } | |
282 | break; | |
283 | ||
c5aa993b JM |
284 | /* This can happen for common symbols when -E is passed to the |
285 | final link. No idea _why_ that would make the linker force | |
286 | common symbols to have an SS_UNSAT scope, but it does. | |
c906108c | 287 | |
c5aa993b JM |
288 | This also happens for weak symbols, but their type is |
289 | ST_DATA. */ | |
c906108c SS |
290 | case SS_UNSAT: |
291 | switch (bufp->symbol_type) | |
292 | { | |
c5aa993b JM |
293 | case ST_STORAGE: |
294 | case ST_DATA: | |
295 | symname = bufp->name.n_strx + stringtab; | |
296 | bufp->symbol_value += data_offset; | |
297 | ms_type = mst_data; | |
298 | break; | |
299 | ||
300 | default: | |
301 | continue; | |
c906108c SS |
302 | } |
303 | break; | |
304 | ||
305 | default: | |
306 | continue; | |
307 | } | |
308 | ||
309 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) | |
310 | error ("Invalid symbol data; bad HP string table offset: %d", | |
311 | bufp->name.n_strx); | |
312 | ||
c5aa993b | 313 | prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
c906108c SS |
314 | objfile); |
315 | } | |
316 | } | |
317 | ||
318 | /* Scan and build partial symbols for a symbol file. | |
319 | We have been initialized by a call to som_symfile_init, which | |
320 | currently does nothing. | |
321 | ||
322 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
323 | in each section. This is ignored, as it isn't needed for SOM. | |
324 | ||
325 | MAINLINE is true if we are reading the main symbol | |
326 | table (as opposed to a shared lib or dynamically loaded file). | |
327 | ||
328 | This function only does the minimum work necessary for letting the | |
329 | user "name" things symbolically; it does not read the entire symtab. | |
330 | Instead, it reads the external and static symbols and puts them in partial | |
331 | symbol tables. When more extensive information is requested of a | |
332 | file, the corresponding partial symbol table is mutated into a full | |
333 | fledged symbol table by going back and reading the symbols | |
334 | for real. | |
335 | ||
336 | We look for sections with specific names, to tell us what debug | |
337 | format to look for: FIXME!!! | |
338 | ||
339 | somstab_build_psymtabs() handles STABS symbols. | |
340 | ||
341 | Note that SOM files have a "minimal" symbol table, which is vaguely | |
342 | reminiscent of a COFF symbol table, but has only the minimal information | |
343 | necessary for linking. We process this also, and use the information to | |
344 | build gdb's minimal symbol table. This gives us some minimal debugging | |
345 | capability even for files compiled without -g. */ | |
346 | ||
347 | static void | |
fba45db2 | 348 | som_symfile_read (struct objfile *objfile, int mainline) |
c906108c SS |
349 | { |
350 | bfd *abfd = objfile->obfd; | |
351 | struct cleanup *back_to; | |
352 | ||
353 | do_pxdb (symfile_bfd_open (objfile->name)); | |
354 | ||
355 | init_minimal_symbol_collection (); | |
56e290f4 | 356 | back_to = make_cleanup_discard_minimal_symbols (); |
c906108c SS |
357 | |
358 | /* Read in the import list and the export list. Currently | |
359 | the export list isn't used; the import list is used in | |
360 | hp-symtab-read.c to handle static vars declared in other | |
361 | shared libraries. */ | |
362 | init_import_symbols (objfile); | |
c5aa993b | 363 | #if 0 /* Export symbols not used today 1997-08-05 */ |
c906108c SS |
364 | init_export_symbols (objfile); |
365 | #else | |
366 | objfile->export_list = NULL; | |
367 | objfile->export_list_size = 0; | |
368 | #endif | |
369 | ||
370 | /* Process the normal SOM symbol table first. | |
371 | This reads in the DNTT and string table, but doesn't | |
372 | actually scan the DNTT. It does scan the linker symbol | |
373 | table and thus build up a "minimal symbol table". */ | |
c5aa993b | 374 | |
96baa820 | 375 | som_symtab_read (abfd, objfile, objfile->section_offsets); |
c906108c SS |
376 | |
377 | /* Now read information from the stabs debug sections. | |
378 | This is a no-op for SOM. | |
379 | Perhaps it is intended for some kind of mixed STABS/SOM | |
c5aa993b | 380 | situation? */ |
96baa820 | 381 | stabsect_build_psymtabs (objfile, mainline, |
c906108c SS |
382 | "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
383 | ||
384 | /* Now read the native debug information. | |
385 | This builds the psymtab. This used to be done via a scan of | |
386 | the DNTT, but is now done via the PXDB-built quick-lookup tables | |
387 | together with a scan of the GNTT. See hp-psymtab-read.c. */ | |
d4f3574e | 388 | hpread_build_psymtabs (objfile, mainline); |
c906108c SS |
389 | |
390 | /* Install any minimal symbols that have been collected as the current | |
391 | minimal symbols for this objfile. | |
392 | Further symbol-reading is done incrementally, file-by-file, | |
393 | in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c | |
394 | contains the code to do the actual DNTT scanning and symtab building. */ | |
395 | install_minimal_symbols (objfile); | |
396 | ||
397 | /* Force hppa-tdep.c to re-read the unwind descriptors. */ | |
398 | objfile->obj_private = NULL; | |
399 | do_cleanups (back_to); | |
400 | } | |
401 | ||
402 | /* Initialize anything that needs initializing when a completely new symbol | |
403 | file is specified (not just adding some symbols from another file, e.g. a | |
404 | shared library). | |
405 | ||
406 | We reinitialize buildsym, since we may be reading stabs from a SOM file. */ | |
407 | ||
408 | static void | |
fba45db2 | 409 | som_new_init (struct objfile *ignore) |
c906108c SS |
410 | { |
411 | stabsread_new_init (); | |
412 | buildsym_new_init (); | |
413 | } | |
414 | ||
415 | /* Perform any local cleanups required when we are done with a particular | |
416 | objfile. I.E, we are in the process of discarding all symbol information | |
417 | for an objfile, freeing up all memory held for it, and unlinking the | |
418 | objfile struct from the global list of known objfiles. */ | |
419 | ||
420 | static void | |
fba45db2 | 421 | som_symfile_finish (struct objfile *objfile) |
c906108c | 422 | { |
c5aa993b | 423 | if (objfile->sym_stab_info != NULL) |
c906108c | 424 | { |
c5aa993b | 425 | mfree (objfile->md, objfile->sym_stab_info); |
c906108c SS |
426 | } |
427 | hpread_symfile_finish (objfile); | |
428 | } | |
429 | ||
430 | /* SOM specific initialization routine for reading symbols. */ | |
431 | ||
432 | static void | |
fba45db2 | 433 | som_symfile_init (struct objfile *objfile) |
c906108c SS |
434 | { |
435 | /* SOM objects may be reordered, so set OBJF_REORDERED. If we | |
436 | find this causes a significant slowdown in gdb then we could | |
437 | set it in the debug symbol readers only when necessary. */ | |
438 | objfile->flags |= OBJF_REORDERED; | |
439 | hpread_symfile_init (objfile); | |
440 | } | |
441 | ||
442 | /* SOM specific parsing routine for section offsets. | |
443 | ||
444 | Plain and simple for now. */ | |
445 | ||
d4f3574e | 446 | static void |
fba45db2 | 447 | som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
c906108c | 448 | { |
c906108c | 449 | int i; |
0aa9cf96 | 450 | CORE_ADDR text_addr; |
c906108c SS |
451 | |
452 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 453 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 454 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
c906108c | 455 | |
b8fbeb18 EZ |
456 | /* FIXME: ezannoni 2000-04-20 The section names in SOM are not |
457 | .text, .data, etc, but $TEXT$, $DATA$,... We should initialize | |
458 | SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't | |
459 | know the correspondence between SOM sections and GDB's idea of | |
460 | section names. So for now we default to what is was before these | |
461 | changes.*/ | |
462 | objfile->sect_index_text = 0; | |
463 | objfile->sect_index_data = 1; | |
464 | objfile->sect_index_bss = 2; | |
465 | objfile->sect_index_rodata = 3; | |
466 | ||
c906108c | 467 | /* First see if we're a shared library. If so, get the section |
2acceee2 | 468 | offsets from the library, else get them from addrs. */ |
d4f3574e | 469 | if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
c906108c | 470 | { |
b8fbeb18 EZ |
471 | /* Note: Here is OK to compare with ".text" because this is the |
472 | name that gdb itself gives to that section, not the SOM | |
473 | name. */ | |
0aa9cf96 EZ |
474 | for (i = 0; i < SECT_OFF_MAX && addrs->other[i].name; i++) |
475 | if (strcmp (addrs->other[i].name, ".text") == 0) | |
476 | break; | |
477 | text_addr = addrs->other[i].addr; | |
478 | ||
c906108c | 479 | for (i = 0; i < SECT_OFF_MAX; i++) |
f0a58b0b | 480 | (objfile->section_offsets)->offsets[i] = text_addr; |
c906108c | 481 | } |
c906108c SS |
482 | } |
483 | ||
c906108c SS |
484 | /* Read in and initialize the SOM import list which is present |
485 | for all executables and shared libraries. The import list | |
486 | consists of the symbols that are referenced in OBJFILE but | |
487 | not defined there. (Variables that are imported are dealt | |
488 | with as "loc_indirect" vars.) | |
489 | Return value = number of import symbols read in. */ | |
490 | int | |
fba45db2 | 491 | init_import_symbols (struct objfile *objfile) |
c906108c SS |
492 | { |
493 | unsigned int import_list; | |
494 | unsigned int import_list_size; | |
495 | unsigned int string_table; | |
496 | unsigned int string_table_size; | |
c5aa993b | 497 | char *string_buffer; |
c906108c SS |
498 | register int i; |
499 | register int j; | |
500 | register int k; | |
c5aa993b JM |
501 | asection *text_section; /* section handle */ |
502 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
503 | |
504 | /* A struct for an entry in the SOM import list */ | |
c5aa993b JM |
505 | typedef struct |
506 | { | |
507 | int name; /* index into the string table */ | |
508 | short dont_care1; /* we don't use this */ | |
509 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
510 | unsigned int reserved2:8; /* not used */ | |
511 | } | |
512 | SomImportEntry; | |
513 | ||
514 | /* We read 100 entries in at a time from the disk file. */ | |
515 | #define SOM_READ_IMPORTS_NUM 100 | |
516 | #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) | |
c906108c | 517 | SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
c5aa993b | 518 | |
c906108c SS |
519 | /* Initialize in case we error out */ |
520 | objfile->import_list = NULL; | |
521 | objfile->import_list_size = 0; | |
522 | ||
c906108c | 523 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 524 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
525 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
526 | if (!text_section) | |
527 | return 0; | |
c5aa993b | 528 | /* Get the SOM executable header */ |
c906108c SS |
529 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
530 | ||
531 | /* Check header version number for 10.x HP-UX */ | |
532 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 533 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
534 | if (dl_header[0] != 93092112) |
535 | return 0; | |
c5aa993b JM |
536 | |
537 | import_list = dl_header[4]; | |
c906108c SS |
538 | import_list_size = dl_header[5]; |
539 | if (!import_list_size) | |
540 | return 0; | |
c5aa993b | 541 | string_table = dl_header[10]; |
c906108c SS |
542 | string_table_size = dl_header[11]; |
543 | if (!string_table_size) | |
544 | return 0; | |
545 | ||
c5aa993b | 546 | /* Suck in SOM string table */ |
c906108c SS |
547 | string_buffer = (char *) xmalloc (string_table_size); |
548 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 549 | string_table, string_table_size); |
c906108c SS |
550 | |
551 | /* Allocate import list in the psymbol obstack; this has nothing | |
552 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 553 | import list to be freed when the objfile is deallocated */ |
c906108c SS |
554 | objfile->import_list |
555 | = (ImportEntry *) obstack_alloc (&objfile->psymbol_obstack, | |
c5aa993b | 556 | import_list_size * sizeof (ImportEntry)); |
c906108c | 557 | |
c5aa993b JM |
558 | /* Read in the import entries, a bunch at a time */ |
559 | for (j = 0, k = 0; | |
c906108c SS |
560 | j < (import_list_size / SOM_READ_IMPORTS_NUM); |
561 | j++) | |
562 | { | |
563 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
564 | import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
565 | SOM_READ_IMPORTS_CHUNK_SIZE); | |
566 | for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) | |
567 | { | |
568 | if (buffer[i].type != (unsigned char) 0) | |
569 | { | |
570 | objfile->import_list[k] | |
571 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
572 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
573 | /* Some day we might want to record the type and other information too */ | |
574 | } | |
575 | else /* null type */ | |
576 | objfile->import_list[k] = NULL; | |
577 | ||
578 | } | |
c906108c SS |
579 | } |
580 | ||
c5aa993b | 581 | /* Get the leftovers */ |
c906108c SS |
582 | if (k < import_list_size) |
583 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
584 | import_list + k * sizeof (SomImportEntry), |
585 | (import_list_size - k) * sizeof (SomImportEntry)); | |
586 | for (i = 0; k < import_list_size; i++, k++) | |
c906108c SS |
587 | { |
588 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
589 | { |
590 | objfile->import_list[k] | |
591 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
592 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); | |
593 | /* Some day we might want to record the type and other information too */ | |
594 | } | |
c906108c | 595 | else |
c5aa993b | 596 | objfile->import_list[k] = NULL; |
c906108c SS |
597 | } |
598 | ||
599 | objfile->import_list_size = import_list_size; | |
600 | free (string_buffer); | |
601 | return import_list_size; | |
602 | } | |
603 | ||
604 | /* Read in and initialize the SOM export list which is present | |
605 | for all executables and shared libraries. The import list | |
606 | consists of the symbols that are referenced in OBJFILE but | |
607 | not defined there. (Variables that are imported are dealt | |
608 | with as "loc_indirect" vars.) | |
609 | Return value = number of import symbols read in. */ | |
610 | int | |
fba45db2 | 611 | init_export_symbols (struct objfile *objfile) |
c906108c SS |
612 | { |
613 | unsigned int export_list; | |
614 | unsigned int export_list_size; | |
615 | unsigned int string_table; | |
616 | unsigned int string_table_size; | |
c5aa993b | 617 | char *string_buffer; |
c906108c SS |
618 | register int i; |
619 | register int j; | |
620 | register int k; | |
c5aa993b JM |
621 | asection *text_section; /* section handle */ |
622 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
623 | |
624 | /* A struct for an entry in the SOM export list */ | |
c5aa993b JM |
625 | typedef struct |
626 | { | |
627 | int next; /* for hash table use -- we don't use this */ | |
628 | int name; /* index into string table */ | |
629 | int value; /* offset or plabel */ | |
630 | int dont_care1; /* not used */ | |
631 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
632 | char dont_care2; /* not used */ | |
633 | short dont_care3; /* not used */ | |
634 | } | |
635 | SomExportEntry; | |
636 | ||
637 | /* We read 100 entries in at a time from the disk file. */ | |
638 | #define SOM_READ_EXPORTS_NUM 100 | |
639 | #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) | |
c906108c SS |
640 | SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
641 | ||
642 | /* Initialize in case we error out */ | |
643 | objfile->export_list = NULL; | |
644 | objfile->export_list_size = 0; | |
645 | ||
c906108c | 646 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 647 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
648 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
649 | if (!text_section) | |
650 | return 0; | |
c5aa993b | 651 | /* Get the SOM executable header */ |
c906108c SS |
652 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
653 | ||
654 | /* Check header version number for 10.x HP-UX */ | |
655 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 656 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
657 | if (dl_header[0] != 93092112) |
658 | return 0; | |
c5aa993b JM |
659 | |
660 | export_list = dl_header[8]; | |
661 | export_list_size = dl_header[9]; | |
c906108c SS |
662 | if (!export_list_size) |
663 | return 0; | |
c5aa993b | 664 | string_table = dl_header[10]; |
c906108c SS |
665 | string_table_size = dl_header[11]; |
666 | if (!string_table_size) | |
667 | return 0; | |
668 | ||
c5aa993b | 669 | /* Suck in SOM string table */ |
c906108c SS |
670 | string_buffer = (char *) xmalloc (string_table_size); |
671 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 672 | string_table, string_table_size); |
c906108c SS |
673 | |
674 | /* Allocate export list in the psymbol obstack; this has nothing | |
675 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 676 | export list to be freed when the objfile is deallocated */ |
c906108c | 677 | objfile->export_list |
c5aa993b JM |
678 | = (ExportEntry *) obstack_alloc (&objfile->psymbol_obstack, |
679 | export_list_size * sizeof (ExportEntry)); | |
c906108c | 680 | |
c5aa993b JM |
681 | /* Read in the export entries, a bunch at a time */ |
682 | for (j = 0, k = 0; | |
c906108c SS |
683 | j < (export_list_size / SOM_READ_EXPORTS_NUM); |
684 | j++) | |
685 | { | |
686 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
687 | export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
688 | SOM_READ_EXPORTS_CHUNK_SIZE); | |
689 | for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) | |
690 | { | |
691 | if (buffer[i].type != (unsigned char) 0) | |
692 | { | |
693 | objfile->export_list[k].name | |
694 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
695 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
696 | objfile->export_list[k].address = buffer[i].value; | |
697 | /* Some day we might want to record the type and other information too */ | |
698 | } | |
699 | else | |
700 | /* null type */ | |
701 | { | |
702 | objfile->export_list[k].name = NULL; | |
703 | objfile->export_list[k].address = 0; | |
704 | } | |
705 | } | |
c906108c SS |
706 | } |
707 | ||
c5aa993b | 708 | /* Get the leftovers */ |
c906108c SS |
709 | if (k < export_list_size) |
710 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
711 | export_list + k * sizeof (SomExportEntry), |
712 | (export_list_size - k) * sizeof (SomExportEntry)); | |
713 | for (i = 0; k < export_list_size; i++, k++) | |
c906108c SS |
714 | { |
715 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
716 | { |
717 | objfile->export_list[k].name | |
718 | = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1); | |
719 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); | |
720 | /* Some day we might want to record the type and other information too */ | |
721 | objfile->export_list[k].address = buffer[i].value; | |
722 | } | |
c906108c | 723 | else |
c5aa993b JM |
724 | { |
725 | objfile->export_list[k].name = NULL; | |
726 | objfile->export_list[k].address = 0; | |
727 | } | |
c906108c SS |
728 | } |
729 | ||
730 | objfile->export_list_size = export_list_size; | |
731 | free (string_buffer); | |
732 | return export_list_size; | |
733 | } | |
c5aa993b | 734 | \f |
c906108c SS |
735 | |
736 | ||
c906108c SS |
737 | /* Register that we are able to handle SOM object file formats. */ |
738 | ||
739 | static struct sym_fns som_sym_fns = | |
740 | { | |
741 | bfd_target_som_flavour, | |
c5aa993b JM |
742 | som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
743 | som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
744 | som_symfile_read, /* sym_read: read a symbol file into symtab */ | |
745 | som_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
746 | som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ | |
747 | NULL /* next: pointer to next struct sym_fns */ | |
c906108c SS |
748 | }; |
749 | ||
750 | void | |
fba45db2 | 751 | _initialize_somread (void) |
c906108c SS |
752 | { |
753 | add_symtab_fns (&som_sym_fns); | |
754 | } |