Commit | Line | Data |
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684a832f SG |
1 | /* Read HP PA/Risc object files for GDB. |
2 | Copyright 1991, 1992 Free Software Foundation, Inc. | |
3 | Written by Fred Fish at Cygnus Support. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
684a832f SG |
21 | #include "defs.h" |
22 | #include "bfd.h" | |
1225fcbd | 23 | #include <time.h> /* For time_t in libbfd.h. */ |
ddf5d7e8 | 24 | #include <sys/types.h> /* For time_t, if not in time.h. */ |
684a832f | 25 | #include "libbfd.h" |
61a29659 | 26 | #include "som.h" |
003ccb90 | 27 | #include "libhppa.h" |
684a832f SG |
28 | #include <syms.h> |
29 | #include "symtab.h" | |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
32 | #include "buildsym.h" | |
2731625a | 33 | #include "stabsread.h" |
684a832f SG |
34 | #include "gdb-stabs.h" |
35 | #include "complaints.h" | |
36 | #include <string.h> | |
37 | #include "demangle.h" | |
38 | #include <sys/file.h> | |
1225fcbd JK |
39 | |
40 | /* Size of n_value and n_strx fields in a stab symbol. */ | |
41 | #define BYTES_IN_WORD 4 | |
42 | ||
0213d96f | 43 | #include "aout/aout64.h" |
684a832f SG |
44 | |
45 | /* Various things we might complain about... */ | |
46 | ||
47 | static void | |
48 | pa_symfile_init PARAMS ((struct objfile *)); | |
49 | ||
c7f3b703 JL |
50 | static int |
51 | compare_unwind_entries PARAMS ((struct unwind_table_entry *, | |
52 | struct unwind_table_entry *)); | |
53 | ||
684a832f SG |
54 | static void |
55 | pa_new_init PARAMS ((struct objfile *)); | |
56 | ||
fa9265e5 SG |
57 | static void |
58 | read_unwind_info PARAMS ((struct objfile *)); | |
59 | ||
684a832f SG |
60 | static void |
61 | pa_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); | |
62 | ||
63 | static void | |
64 | pa_symfile_finish PARAMS ((struct objfile *)); | |
65 | ||
66 | static void | |
67 | pa_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *)); | |
68 | ||
69 | static void | |
70 | free_painfo PARAMS ((PTR)); | |
71 | ||
72 | static struct section_offsets * | |
73 | pa_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR)); | |
74 | ||
75 | static void | |
76 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, | |
77 | enum minimal_symbol_type, | |
78 | struct objfile *)); | |
79 | ||
80 | static void | |
81 | record_minimal_symbol (name, address, ms_type, objfile) | |
82 | char *name; | |
83 | CORE_ADDR address; | |
84 | enum minimal_symbol_type ms_type; | |
85 | struct objfile *objfile; | |
86 | { | |
87 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); | |
8d60affd | 88 | prim_record_minimal_symbol (name, address, ms_type, objfile); |
684a832f SG |
89 | } |
90 | ||
91 | /* | |
92 | ||
93 | LOCAL FUNCTION | |
94 | ||
95 | pa_symtab_read -- read the symbol table of a PA file | |
96 | ||
97 | SYNOPSIS | |
98 | ||
99 | void pa_symtab_read (bfd *abfd, CORE_ADDR addr, | |
100 | struct objfile *objfile) | |
101 | ||
102 | DESCRIPTION | |
103 | ||
104 | Given an open bfd, a base address to relocate symbols to, and a | |
105 | flag that specifies whether or not this bfd is for an executable | |
106 | or not (may be shared library for example), add all the global | |
107 | function and data symbols to the minimal symbol table. | |
108 | */ | |
109 | ||
110 | static void | |
111 | pa_symtab_read (abfd, addr, objfile) | |
112 | bfd *abfd; | |
113 | CORE_ADDR addr; | |
114 | struct objfile *objfile; | |
115 | { | |
116 | unsigned int number_of_symbols; | |
117 | unsigned int i; | |
118 | int val; | |
119 | char *stringtab; | |
3cde1ffa JK |
120 | struct symbol_dictionary_record *buf, *bufp, *endbufp; |
121 | char *symname; | |
0213d96f | 122 | CONST int symsize = sizeof (struct symbol_dictionary_record); |
684a832f | 123 | |
0213d96f | 124 | number_of_symbols = bfd_get_symcount (abfd); |
684a832f | 125 | |
0213d96f | 126 | buf = alloca (symsize * number_of_symbols); |
003ccb90 | 127 | bfd_seek (abfd, obj_som_sym_filepos (abfd), L_SET); |
0213d96f SG |
128 | val = bfd_read (buf, symsize * number_of_symbols, 1, abfd); |
129 | if (val != symsize * number_of_symbols) | |
684a832f SG |
130 | error ("Couldn't read symbol dictionary!"); |
131 | ||
003ccb90 KR |
132 | stringtab = alloca (obj_som_stringtab_size (abfd)); |
133 | bfd_seek (abfd, obj_som_str_filepos (abfd), L_SET); | |
134 | val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd); | |
135 | if (val != obj_som_stringtab_size (abfd)) | |
684a832f | 136 | error ("Can't read in HP string table."); |
3cde1ffa JK |
137 | |
138 | endbufp = buf + number_of_symbols; | |
139 | for (bufp = buf; bufp < endbufp; ++bufp) | |
684a832f SG |
140 | { |
141 | enum minimal_symbol_type ms_type; | |
142 | ||
143 | QUIT; | |
144 | ||
3cde1ffa JK |
145 | switch (bufp->symbol_scope) |
146 | { | |
147 | case SS_UNIVERSAL: | |
148 | switch (bufp->symbol_type) | |
149 | { | |
150 | case ST_SYM_EXT: | |
151 | case ST_ARG_EXT: | |
152 | continue; | |
153 | ||
154 | case ST_CODE: | |
155 | case ST_PRI_PROG: | |
156 | case ST_SEC_PROG: | |
157 | case ST_ENTRY: | |
158 | case ST_MILLICODE: | |
159 | symname = bufp->name.n_strx + stringtab; | |
160 | ms_type = mst_text; | |
9fdb3f7a JK |
161 | #ifdef SMASH_TEXT_ADDRESS |
162 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
163 | #endif | |
3cde1ffa JK |
164 | break; |
165 | case ST_DATA: | |
166 | symname = bufp->name.n_strx + stringtab; | |
167 | ms_type = mst_data; | |
168 | break; | |
169 | default: | |
170 | continue; | |
171 | } | |
172 | break; | |
173 | ||
247145e6 JK |
174 | #if 0 |
175 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ | |
3cde1ffa | 176 | case SS_GLOBAL: |
247145e6 | 177 | #endif |
3cde1ffa JK |
178 | case SS_LOCAL: |
179 | switch (bufp->symbol_type) | |
180 | { | |
181 | case ST_SYM_EXT: | |
182 | case ST_ARG_EXT: | |
183 | continue; | |
184 | ||
185 | case ST_CODE: | |
186 | symname = bufp->name.n_strx + stringtab; | |
247145e6 | 187 | ms_type = mst_file_text; |
9fdb3f7a JK |
188 | #ifdef SMASH_TEXT_ADDRESS |
189 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
190 | #endif | |
247145e6 JK |
191 | |
192 | check_strange_names: | |
d64956fa JL |
193 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local |
194 | label prefixes for stabs, constant data, etc. So we need | |
195 | only filter out L$ symbols which are left in due to | |
196 | limitations in how GAS generates SOM relocations. | |
197 | ||
198 | When linking in the HPUX C-library the HP linker has | |
199 | the nasty habit of placing section symbols from the literal | |
200 | subspaces in the middle of the program's text. Filter | |
201 | those out as best we can. Check for first and last character | |
202 | being '$'. */ | |
203 | if ((symname[0] == 'L' && symname[1] == '$') | |
204 | || (symname[0] == '$' && symname[strlen(symname) - 1] == '$')) | |
3cde1ffa | 205 | continue; |
3cde1ffa JK |
206 | break; |
207 | ||
208 | case ST_PRI_PROG: | |
209 | case ST_SEC_PROG: | |
210 | case ST_ENTRY: | |
211 | case ST_MILLICODE: | |
212 | symname = bufp->name.n_strx + stringtab; | |
213 | ms_type = mst_file_text; | |
9fdb3f7a JK |
214 | #ifdef SMASH_TEXT_ADDRESS |
215 | SMASH_TEXT_ADDRESS (bufp->symbol_value); | |
216 | #endif | |
3cde1ffa | 217 | break; |
247145e6 | 218 | |
3cde1ffa JK |
219 | case ST_DATA: |
220 | symname = bufp->name.n_strx + stringtab; | |
221 | ms_type = mst_file_data; | |
247145e6 JK |
222 | goto check_strange_names; |
223 | ||
3cde1ffa JK |
224 | default: |
225 | continue; | |
226 | } | |
247145e6 JK |
227 | break; |
228 | ||
3cde1ffa JK |
229 | default: |
230 | continue; | |
231 | } | |
684a832f | 232 | |
003ccb90 | 233 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) |
684a832f SG |
234 | error ("Invalid symbol data; bad HP string table offset: %d", |
235 | bufp->name.n_strx); | |
236 | ||
3cde1ffa | 237 | record_minimal_symbol (symname, |
684a832f SG |
238 | bufp->symbol_value, ms_type, |
239 | objfile); | |
240 | } | |
241 | ||
242 | install_minimal_symbols (objfile); | |
243 | } | |
244 | ||
c7f3b703 JL |
245 | /* Compare the start address for two unwind entries returning 1 if |
246 | the first address is larger than the second, -1 if the second is | |
247 | larger than the first, and zero if they are equal. */ | |
248 | ||
249 | static int | |
250 | compare_unwind_entries (a, b) | |
251 | struct unwind_table_entry *a; | |
252 | struct unwind_table_entry *b; | |
253 | { | |
254 | if (a->region_start > b->region_start) | |
255 | return 1; | |
256 | else if (a->region_start < b->region_start) | |
257 | return -1; | |
258 | else | |
259 | return 0; | |
260 | } | |
261 | ||
fa9265e5 SG |
262 | /* Read in the backtrace information stored in the `$UNWIND_START$' section of |
263 | the object file. This info is used mainly by find_unwind_entry() to find | |
264 | out the stack frame size and frame pointer used by procedures. We put | |
265 | everything on the psymbol obstack in the objfile so that it automatically | |
266 | gets freed when the objfile is destroyed. */ | |
267 | ||
268 | static void | |
269 | read_unwind_info (objfile) | |
270 | struct objfile *objfile; | |
271 | { | |
c7f3b703 JL |
272 | asection *unwind_sec, *stub_unwind_sec; |
273 | unsigned unwind_size, stub_unwind_size, total_size; | |
274 | unsigned index, unwind_entries, stub_entries, total_entries; | |
fa9265e5 SG |
275 | struct obj_unwind_info *ui; |
276 | ||
277 | ui = obstack_alloc (&objfile->psymbol_obstack, | |
278 | sizeof (struct obj_unwind_info)); | |
279 | ||
280 | ui->table = NULL; | |
281 | ui->cache = NULL; | |
282 | ui->last = -1; | |
283 | ||
c7f3b703 JL |
284 | /* Get hooks to both unwind sections. */ |
285 | unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_START$"); | |
286 | stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$"); | |
287 | ||
288 | /* Get sizes and unwind counts for both sections. */ | |
fa9265e5 SG |
289 | if (unwind_sec) |
290 | { | |
c7f3b703 JL |
291 | unwind_size = bfd_section_size (objfile->obfd, unwind_sec); |
292 | unwind_entries = unwind_size / UNWIND_ENTRY_SIZE; | |
293 | } | |
294 | else | |
295 | { | |
296 | unwind_size = 0; | |
297 | unwind_entries = 0; | |
298 | } | |
299 | ||
300 | if (stub_unwind_sec) | |
301 | { | |
302 | stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec); | |
303 | stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE; | |
304 | } | |
305 | else | |
306 | { | |
307 | stub_unwind_size = 0; | |
308 | stub_entries = 0; | |
309 | } | |
310 | ||
311 | /* Compute total number of stubs. */ | |
312 | total_entries = unwind_entries + stub_entries; | |
313 | total_size = total_entries * sizeof (struct unwind_table_entry); | |
314 | ||
315 | /* Allocate memory for the unwind table. */ | |
316 | ui->table = obstack_alloc (&objfile->psymbol_obstack, total_size); | |
d64956fa | 317 | ui->last = total_entries - 1; |
c7f3b703 JL |
318 | |
319 | /* We will read the unwind entries into temporary memory, then | |
320 | fill in the actual unwind table. */ | |
321 | if (unwind_size > 0) | |
322 | { | |
323 | unsigned long tmp; | |
324 | unsigned i; | |
325 | char *buf = alloca (unwind_size); | |
326 | ||
327 | bfd_get_section_contents (objfile->obfd, unwind_sec, buf, 0, unwind_size); | |
328 | ||
329 | /* Now internalize the information being careful to handle host/target | |
330 | endian issues. */ | |
331 | for (i = 0; i < unwind_entries; i++) | |
332 | { | |
333 | ui->table[i].region_start = bfd_get_32 (objfile->obfd, | |
334 | (bfd_byte *)buf); | |
335 | buf += 4; | |
336 | ui->table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *)buf); | |
337 | buf += 4; | |
338 | tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf); | |
339 | buf += 4; | |
340 | ui->table[i].Cannot_unwind = (tmp >> 31) & 0x1;; | |
341 | ui->table[i].Millicode = (tmp >> 30) & 0x1; | |
342 | ui->table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1; | |
343 | ui->table[i].Region_description = (tmp >> 27) & 0x3; | |
344 | ui->table[i].reserved1 = (tmp >> 26) & 0x1; | |
345 | ui->table[i].Entry_SR = (tmp >> 25) & 0x1; | |
346 | ui->table[i].Entry_FR = (tmp >> 21) & 0xf; | |
347 | ui->table[i].Entry_GR = (tmp >> 16) & 0x1f; | |
348 | ui->table[i].Args_stored = (tmp >> 15) & 0x1; | |
349 | ui->table[i].Variable_Frame = (tmp >> 14) & 0x1; | |
350 | ui->table[i].Separate_Package_Body = (tmp >> 13) & 0x1; | |
351 | ui->table[i].Frame_Extension_Millicode = (tmp >> 12 ) & 0x1; | |
352 | ui->table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1; | |
353 | ui->table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1; | |
354 | ui->table[i].Ada_Region = (tmp >> 9) & 0x1; | |
355 | ui->table[i].reserved2 = (tmp >> 5) & 0xf; | |
356 | ui->table[i].Save_SP = (tmp >> 4) & 0x1; | |
357 | ui->table[i].Save_RP = (tmp >> 3) & 0x1; | |
358 | ui->table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1; | |
359 | ui->table[i].extn_ptr_defined = (tmp >> 1) & 0x1; | |
360 | ui->table[i].Cleanup_defined = tmp & 0x1; | |
361 | tmp = bfd_get_32 (objfile->obfd, (bfd_byte *)buf); | |
362 | buf += 4; | |
363 | ui->table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1; | |
364 | ui->table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1; | |
365 | ui->table[i].Large_frame = (tmp >> 29) & 0x1; | |
366 | ui->table[i].reserved4 = (tmp >> 27) & 0x3; | |
367 | ui->table[i].Total_frame_size = tmp & 0x7ffffff; | |
368 | } | |
369 | ||
370 | } | |
371 | ||
372 | if (stub_unwind_size > 0) | |
373 | { | |
374 | unsigned int i; | |
375 | char *buf = alloca (stub_unwind_size); | |
fa9265e5 | 376 | |
c7f3b703 JL |
377 | /* Read in the stub unwind entries. */ |
378 | bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf, | |
379 | 0, stub_unwind_size); | |
fa9265e5 | 380 | |
c7f3b703 JL |
381 | /* Now convert them into regular unwind entries. */ |
382 | index = unwind_entries; | |
383 | for (i = 0; i < stub_entries; i++, index++) | |
384 | { | |
385 | /* Clear out the next unwind entry. */ | |
386 | memset (&ui->table[index], 0, sizeof (struct unwind_table_entry)); | |
387 | ||
388 | /* Convert offset & size into region_start and region_end. | |
389 | Stuff away the stub type into "reserved" fields. */ | |
390 | ui->table[index].region_start = bfd_get_32 (objfile->obfd, | |
391 | (bfd_byte *) buf); | |
392 | buf += 4; | |
393 | ui->table[index].stub_type = bfd_get_8 (objfile->obfd, | |
394 | (bfd_byte *) buf); | |
395 | buf += 2; | |
396 | ui->table[index].region_end | |
397 | = ui->table[index].region_start + 4 * bfd_get_16 (objfile->obfd, | |
398 | (bfd_byte *) buf); | |
399 | buf += 2; | |
400 | } | |
fa9265e5 | 401 | |
fa9265e5 | 402 | } |
c7f3b703 JL |
403 | |
404 | /* Unwind table needs to be kept sorted. */ | |
405 | qsort (ui->table, total_entries, sizeof (struct unwind_table_entry), | |
406 | compare_unwind_entries); | |
407 | ||
408 | /* Keep a pointer to the unwind information. */ | |
36464897 | 409 | objfile->obj_private = (PTR) ui; |
fa9265e5 SG |
410 | } |
411 | ||
684a832f SG |
412 | /* Scan and build partial symbols for a symbol file. |
413 | We have been initialized by a call to pa_symfile_init, which | |
414 | currently does nothing. | |
415 | ||
416 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
417 | in each section. This is ignored, as it isn't needed for the PA. | |
418 | ||
419 | MAINLINE is true if we are reading the main symbol | |
420 | table (as opposed to a shared lib or dynamically loaded file). | |
421 | ||
422 | This function only does the minimum work necessary for letting the | |
423 | user "name" things symbolically; it does not read the entire symtab. | |
424 | Instead, it reads the external and static symbols and puts them in partial | |
425 | symbol tables. When more extensive information is requested of a | |
426 | file, the corresponding partial symbol table is mutated into a full | |
427 | fledged symbol table by going back and reading the symbols | |
428 | for real. | |
429 | ||
430 | We look for sections with specific names, to tell us what debug | |
431 | format to look for: FIXME!!! | |
432 | ||
433 | pastab_build_psymtabs() handles STABS symbols. | |
434 | ||
435 | Note that PA files have a "minimal" symbol table, which is vaguely | |
436 | reminiscent of a COFF symbol table, but has only the minimal information | |
437 | necessary for linking. We process this also, and use the information to | |
438 | build gdb's minimal symbol table. This gives us some minimal debugging | |
439 | capability even for files compiled without -g. */ | |
440 | ||
441 | static void | |
442 | pa_symfile_read (objfile, section_offsets, mainline) | |
443 | struct objfile *objfile; | |
444 | struct section_offsets *section_offsets; | |
445 | int mainline; | |
446 | { | |
447 | bfd *abfd = objfile->obfd; | |
448 | struct cleanup *back_to; | |
449 | CORE_ADDR offset; | |
450 | ||
451 | init_minimal_symbol_collection (); | |
452 | back_to = make_cleanup (discard_minimal_symbols, 0); | |
453 | ||
454 | make_cleanup (free_painfo, (PTR) objfile); | |
455 | ||
456 | /* Process the normal PA symbol table first. */ | |
457 | ||
458 | /* FIXME, should take a section_offsets param, not just an offset. */ | |
459 | ||
460 | offset = ANOFFSET (section_offsets, 0); | |
461 | pa_symtab_read (abfd, offset, objfile); | |
462 | ||
463 | /* Now process debugging information, which is contained in | |
464 | special PA sections. */ | |
465 | ||
466 | pastab_build_psymtabs (objfile, section_offsets, mainline); | |
467 | ||
fa9265e5 SG |
468 | read_unwind_info(objfile); |
469 | ||
684a832f SG |
470 | do_cleanups (back_to); |
471 | } | |
472 | ||
965a5c32 | 473 | /* This cleans up the objfile's sym_stab_info pointer, and the chain of |
684a832f SG |
474 | stab_section_info's, that might be dangling from it. */ |
475 | ||
476 | static void | |
477 | free_painfo (objp) | |
478 | PTR objp; | |
479 | { | |
480 | struct objfile *objfile = (struct objfile *)objp; | |
481 | struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *) | |
965a5c32 | 482 | objfile->sym_stab_info; |
684a832f SG |
483 | struct stab_section_info *ssi, *nssi; |
484 | ||
485 | ssi = dbxinfo->stab_section_info; | |
486 | while (ssi) | |
487 | { | |
488 | nssi = ssi->next; | |
489 | mfree (objfile->md, ssi); | |
490 | ssi = nssi; | |
491 | } | |
492 | ||
493 | dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */ | |
494 | } | |
495 | ||
496 | /* Initialize anything that needs initializing when a completely new symbol | |
497 | file is specified (not just adding some symbols from another file, e.g. a | |
498 | shared library). | |
499 | ||
500 | We reinitialize buildsym, since we may be reading stabs from a PA file. */ | |
501 | ||
502 | static void | |
503 | pa_new_init (ignore) | |
504 | struct objfile *ignore; | |
505 | { | |
506 | stabsread_new_init (); | |
507 | buildsym_new_init (); | |
508 | } | |
509 | ||
510 | /* Perform any local cleanups required when we are done with a particular | |
511 | objfile. I.E, we are in the process of discarding all symbol information | |
512 | for an objfile, freeing up all memory held for it, and unlinking the | |
513 | objfile struct from the global list of known objfiles. */ | |
514 | ||
515 | static void | |
516 | pa_symfile_finish (objfile) | |
517 | struct objfile *objfile; | |
518 | { | |
965a5c32 | 519 | if (objfile -> sym_stab_info != NULL) |
684a832f | 520 | { |
965a5c32 | 521 | mfree (objfile -> md, objfile -> sym_stab_info); |
684a832f SG |
522 | } |
523 | } | |
524 | ||
684a832f SG |
525 | /* PA specific initialization routine for reading symbols. |
526 | ||
527 | It is passed a pointer to a struct sym_fns which contains, among other | |
528 | things, the BFD for the file whose symbols are being read, and a slot for | |
529 | a pointer to "private data" which we can fill with goodies. | |
530 | ||
531 | This routine is almost a complete ripoff of dbx_symfile_init. The | |
532 | common parts of these routines should be extracted and used instead of | |
533 | duplicating this code. FIXME. */ | |
534 | ||
535 | static void | |
536 | pa_symfile_init (objfile) | |
537 | struct objfile *objfile; | |
538 | { | |
539 | int val; | |
540 | bfd *sym_bfd = objfile->obfd; | |
541 | char *name = bfd_get_filename (sym_bfd); | |
0213d96f SG |
542 | asection *stabsect; /* Section containing symbol table entries */ |
543 | asection *stringsect; /* Section containing symbol name strings */ | |
544 | ||
545 | stabsect = bfd_get_section_by_name (sym_bfd, "$GDB_SYMBOLS$"); | |
546 | stringsect = bfd_get_section_by_name (sym_bfd, "$GDB_STRINGS$"); | |
684a832f SG |
547 | |
548 | /* Allocate struct to keep track of the symfile */ | |
965a5c32 | 549 | objfile->sym_stab_info = (PTR) |
684a832f SG |
550 | xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info)); |
551 | ||
965a5c32 | 552 | memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info)); |
0213d96f | 553 | |
0213d96f | 554 | |
684a832f | 555 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ |
0213d96f SG |
556 | #define STRING_TABLE_OFFSET (stringsect->filepos) |
557 | #define SYMBOL_TABLE_OFFSET (stabsect->filepos) | |
684a832f SG |
558 | |
559 | /* FIXME POKING INSIDE BFD DATA STRUCTURES */ | |
560 | ||
561 | DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL; | |
db98e4d8 | 562 | DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, "$TEXT$"); |
684a832f | 563 | if (!DBX_TEXT_SECT (objfile)) |
db98e4d8 | 564 | error ("Can't find $TEXT$ section in symbol file"); |
684a832f | 565 | |
f3628b39 FF |
566 | if (!stabsect) |
567 | return; | |
568 | ||
569 | if (!stringsect) | |
570 | error ("Found stabs, but not string section"); | |
571 | ||
1225fcbd JK |
572 | /* FIXME: I suspect this should be external_nlist. The size of host |
573 | types like long and bfd_vma should not affect how we read the | |
574 | file. */ | |
0213d96f SG |
575 | DBX_SYMBOL_SIZE (objfile) = sizeof (struct internal_nlist); |
576 | DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect) | |
577 | / DBX_SYMBOL_SIZE (objfile); | |
684a832f SG |
578 | DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET; |
579 | ||
580 | /* Read the string table and stash it away in the psymbol_obstack. It is | |
581 | only needed as long as we need to expand psymbols into full symbols, | |
582 | so when we blow away the psymbol the string table goes away as well. | |
583 | Note that gdb used to use the results of attempting to malloc the | |
584 | string table, based on the size it read, as a form of sanity check | |
585 | for botched byte swapping, on the theory that a byte swapped string | |
586 | table size would be so totally bogus that the malloc would fail. Now | |
587 | that we put in on the psymbol_obstack, we can't do this since gdb gets | |
588 | a fatal error (out of virtual memory) if the size is bogus. We can | |
589 | however at least check to see if the size is zero or some negative | |
590 | value. */ | |
591 | ||
0213d96f | 592 | DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stringsect); |
684a832f SG |
593 | |
594 | if (DBX_SYMCOUNT (objfile) == 0 | |
595 | || DBX_STRINGTAB_SIZE (objfile) == 0) | |
596 | return; | |
597 | ||
598 | if (DBX_STRINGTAB_SIZE (objfile) <= 0 | |
599 | || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd)) | |
600 | error ("ridiculous string table size (%d bytes).", | |
601 | DBX_STRINGTAB_SIZE (objfile)); | |
602 | ||
603 | DBX_STRINGTAB (objfile) = | |
604 | (char *) obstack_alloc (&objfile -> psymbol_obstack, | |
605 | DBX_STRINGTAB_SIZE (objfile)); | |
606 | ||
607 | /* Now read in the string table in one big gulp. */ | |
608 | ||
609 | val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET); | |
610 | if (val < 0) | |
611 | perror_with_name (name); | |
612 | val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1, | |
613 | sym_bfd); | |
93af329a JK |
614 | if (val == 0) |
615 | error ("End of file reading string table"); | |
616 | else if (val < 0) | |
617 | /* It's possible bfd_read should be setting bfd_error, and we should be | |
618 | checking that. But currently it doesn't set bfd_error. */ | |
684a832f | 619 | perror_with_name (name); |
93af329a JK |
620 | else if (val != DBX_STRINGTAB_SIZE (objfile)) |
621 | error ("Short read reading string table"); | |
684a832f SG |
622 | } |
623 | ||
624 | /* PA specific parsing routine for section offsets. | |
625 | ||
626 | Plain and simple for now. */ | |
627 | ||
628 | static struct section_offsets * | |
629 | pa_symfile_offsets (objfile, addr) | |
630 | struct objfile *objfile; | |
631 | CORE_ADDR addr; | |
632 | { | |
633 | struct section_offsets *section_offsets; | |
634 | int i; | |
4d57c599 JK |
635 | |
636 | objfile->num_sections = SECT_OFF_MAX; | |
684a832f SG |
637 | section_offsets = (struct section_offsets *) |
638 | obstack_alloc (&objfile -> psymbol_obstack, | |
4d57c599 JK |
639 | sizeof (struct section_offsets) |
640 | + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1)); | |
684a832f SG |
641 | |
642 | for (i = 0; i < SECT_OFF_MAX; i++) | |
643 | ANOFFSET (section_offsets, i) = addr; | |
4d57c599 | 644 | |
684a832f SG |
645 | return section_offsets; |
646 | } | |
647 | \f | |
00b02f17 | 648 | /* Register that we are able to handle SOM object file formats. */ |
684a832f | 649 | |
684a832f SG |
650 | static struct sym_fns pa_sym_fns = |
651 | { | |
55449edd | 652 | bfd_target_som_flavour, |
684a832f SG |
653 | pa_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
654 | pa_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
655 | pa_symfile_read, /* sym_read: read a symbol file into symtab */ | |
656 | pa_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
657 | pa_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ | |
658 | NULL /* next: pointer to next struct sym_fns */ | |
659 | }; | |
660 | ||
661 | void | |
662 | _initialize_paread () | |
663 | { | |
664 | add_symtab_fns (&pa_sym_fns); | |
665 | } |