Commit | Line | Data |
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c906108c | 1 | /* Read HP PA/Risc object files for GDB. |
197e01b6 | 2 | Copyright (C) 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, |
8b92e4d5 | 3 | 2004 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 | |
197e01b6 EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, 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 | ||
17fe2d6e | 38 | #include "solib-som.h" |
c906108c | 39 | |
17fe2d6e | 40 | /* Prototypes for local functions. */ |
65e82032 AC |
41 | static int init_import_symbols (struct objfile *objfile); |
42 | ||
c906108c SS |
43 | /* FIXME: These should really be in a common header somewhere */ |
44 | ||
a14ed312 | 45 | extern void hpread_build_psymtabs (struct objfile *, int); |
c906108c | 46 | |
a14ed312 | 47 | extern void hpread_symfile_finish (struct objfile *); |
c906108c | 48 | |
a14ed312 | 49 | extern void hpread_symfile_init (struct objfile *); |
c906108c | 50 | |
a14ed312 | 51 | extern void do_pxdb (bfd *); |
c906108c SS |
52 | |
53 | /* | |
54 | ||
c5aa993b | 55 | LOCAL FUNCTION |
c906108c | 56 | |
c5aa993b | 57 | som_symtab_read -- read the symbol table of a SOM file |
c906108c | 58 | |
c5aa993b | 59 | SYNOPSIS |
c906108c | 60 | |
c5aa993b JM |
61 | void som_symtab_read (bfd *abfd, struct objfile *objfile, |
62 | struct section_offsets *section_offsets) | |
c906108c | 63 | |
c5aa993b | 64 | DESCRIPTION |
c906108c | 65 | |
c5aa993b JM |
66 | Given an open bfd, a base address to relocate symbols to, and a |
67 | flag that specifies whether or not this bfd is for an executable | |
68 | or not (may be shared library for example), add all the global | |
69 | function and data symbols to the minimal symbol table. | |
70 | */ | |
c906108c SS |
71 | |
72 | static void | |
fba45db2 KB |
73 | som_symtab_read (bfd *abfd, struct objfile *objfile, |
74 | struct section_offsets *section_offsets) | |
c906108c SS |
75 | { |
76 | unsigned int number_of_symbols; | |
77 | int val, dynamic; | |
78 | char *stringtab; | |
79 | asection *shlib_info; | |
80 | struct symbol_dictionary_record *buf, *bufp, *endbufp; | |
81 | char *symname; | |
82 | CONST int symsize = sizeof (struct symbol_dictionary_record); | |
83 | CORE_ADDR text_offset, data_offset; | |
84 | ||
85 | ||
86 | text_offset = ANOFFSET (section_offsets, 0); | |
87 | data_offset = ANOFFSET (section_offsets, 1); | |
88 | ||
89 | number_of_symbols = bfd_get_symcount (abfd); | |
90 | ||
34c0bd93 | 91 | /* FIXME (alloca): could be quite large. */ |
c906108c SS |
92 | buf = alloca (symsize * number_of_symbols); |
93 | bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET); | |
3a42e9d0 | 94 | val = bfd_bread (buf, symsize * number_of_symbols, abfd); |
c906108c | 95 | if (val != symsize * number_of_symbols) |
8a3fe4f8 | 96 | error (_("Couldn't read symbol dictionary!")); |
c906108c | 97 | |
34c0bd93 | 98 | /* FIXME (alloca): could be quite large. */ |
c906108c SS |
99 | stringtab = alloca (obj_som_stringtab_size (abfd)); |
100 | bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET); | |
3a42e9d0 | 101 | val = bfd_bread (stringtab, obj_som_stringtab_size (abfd), abfd); |
c906108c | 102 | if (val != obj_som_stringtab_size (abfd)) |
8a3fe4f8 | 103 | error (_("Can't read in HP string table.")); |
c906108c SS |
104 | |
105 | /* We need to determine if objfile is a dynamic executable (so we | |
106 | can do the right thing for ST_ENTRY vs ST_CODE symbols). | |
107 | ||
108 | There's nothing in the header which easily allows us to do | |
3fa41cdb JL |
109 | this. |
110 | ||
111 | This code used to rely upon the existence of a $SHLIB_INFO$ | |
112 | section to make this determination. HP claims that it is | |
113 | more accurate to check for a nonzero text offset, but they | |
114 | have not provided any information about why that test is | |
115 | more accurate. */ | |
c906108c SS |
116 | dynamic = (text_offset != 0); |
117 | ||
118 | endbufp = buf + number_of_symbols; | |
119 | for (bufp = buf; bufp < endbufp; ++bufp) | |
120 | { | |
121 | enum minimal_symbol_type ms_type; | |
122 | ||
123 | QUIT; | |
124 | ||
125 | switch (bufp->symbol_scope) | |
126 | { | |
127 | case SS_UNIVERSAL: | |
128 | case SS_EXTERNAL: | |
129 | switch (bufp->symbol_type) | |
130 | { | |
131 | case ST_SYM_EXT: | |
132 | case ST_ARG_EXT: | |
133 | continue; | |
134 | ||
135 | case ST_CODE: | |
136 | case ST_PRI_PROG: | |
137 | case ST_SEC_PROG: | |
138 | case ST_MILLICODE: | |
139 | symname = bufp->name.n_strx + stringtab; | |
140 | ms_type = mst_text; | |
141 | bufp->symbol_value += text_offset; | |
181c1381 | 142 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
143 | break; |
144 | ||
145 | case ST_ENTRY: | |
146 | symname = bufp->name.n_strx + stringtab; | |
147 | /* For a dynamic executable, ST_ENTRY symbols are | |
c5aa993b JM |
148 | the stubs, while the ST_CODE symbol is the real |
149 | function. */ | |
c906108c SS |
150 | if (dynamic) |
151 | ms_type = mst_solib_trampoline; | |
152 | else | |
153 | ms_type = mst_text; | |
154 | bufp->symbol_value += text_offset; | |
181c1381 | 155 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
156 | break; |
157 | ||
158 | case ST_STUB: | |
159 | symname = bufp->name.n_strx + stringtab; | |
160 | ms_type = mst_solib_trampoline; | |
161 | bufp->symbol_value += text_offset; | |
181c1381 | 162 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
163 | break; |
164 | ||
165 | case ST_DATA: | |
166 | symname = bufp->name.n_strx + stringtab; | |
167 | bufp->symbol_value += data_offset; | |
168 | ms_type = mst_data; | |
169 | break; | |
170 | default: | |
171 | continue; | |
172 | } | |
173 | break; | |
174 | ||
175 | #if 0 | |
176 | /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */ | |
177 | case SS_GLOBAL: | |
178 | #endif | |
179 | case SS_LOCAL: | |
180 | switch (bufp->symbol_type) | |
181 | { | |
182 | case ST_SYM_EXT: | |
183 | case ST_ARG_EXT: | |
184 | continue; | |
185 | ||
186 | case ST_CODE: | |
187 | symname = bufp->name.n_strx + stringtab; | |
188 | ms_type = mst_file_text; | |
189 | bufp->symbol_value += text_offset; | |
181c1381 | 190 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
191 | |
192 | check_strange_names: | |
193 | /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local | |
c5aa993b JM |
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 | ||
204 | And finally, the newer HP compilers emit crud like $PIC_foo$N | |
205 | in some circumstance (PIC code I guess). It's also claimed | |
206 | that they emit D$ symbols too. What stupidity. */ | |
c906108c | 207 | if ((symname[0] == 'L' && symname[1] == '$') |
c5aa993b | 208 | || (symname[0] == '$' && symname[strlen (symname) - 1] == '$') |
c906108c | 209 | || (symname[0] == 'D' && symname[1] == '$') |
b887c273 | 210 | || (strncmp (symname, "L0\001", 3) == 0) |
c906108c SS |
211 | || (strncmp (symname, "$PIC", 4) == 0)) |
212 | continue; | |
213 | break; | |
214 | ||
215 | case ST_PRI_PROG: | |
216 | case ST_SEC_PROG: | |
217 | case ST_MILLICODE: | |
218 | symname = bufp->name.n_strx + stringtab; | |
219 | ms_type = mst_file_text; | |
220 | bufp->symbol_value += text_offset; | |
181c1381 | 221 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
222 | break; |
223 | ||
224 | case ST_ENTRY: | |
225 | symname = bufp->name.n_strx + stringtab; | |
3fa41cdb JL |
226 | /* SS_LOCAL symbols in a shared library do not have |
227 | export stubs, so we do not have to worry about | |
228 | using mst_file_text vs mst_solib_trampoline here like | |
229 | we do for SS_UNIVERSAL and SS_EXTERNAL symbols above. */ | |
230 | ms_type = mst_file_text; | |
c906108c | 231 | bufp->symbol_value += text_offset; |
181c1381 | 232 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
233 | break; |
234 | ||
235 | case ST_STUB: | |
236 | symname = bufp->name.n_strx + stringtab; | |
237 | ms_type = mst_solib_trampoline; | |
238 | bufp->symbol_value += text_offset; | |
181c1381 | 239 | bufp->symbol_value = SMASH_TEXT_ADDRESS (bufp->symbol_value); |
c906108c SS |
240 | break; |
241 | ||
242 | ||
243 | case ST_DATA: | |
244 | symname = bufp->name.n_strx + stringtab; | |
245 | bufp->symbol_value += data_offset; | |
246 | ms_type = mst_file_data; | |
247 | goto check_strange_names; | |
248 | ||
249 | default: | |
250 | continue; | |
251 | } | |
252 | break; | |
253 | ||
c5aa993b JM |
254 | /* This can happen for common symbols when -E is passed to the |
255 | final link. No idea _why_ that would make the linker force | |
256 | common symbols to have an SS_UNSAT scope, but it does. | |
c906108c | 257 | |
c5aa993b JM |
258 | This also happens for weak symbols, but their type is |
259 | ST_DATA. */ | |
c906108c SS |
260 | case SS_UNSAT: |
261 | switch (bufp->symbol_type) | |
262 | { | |
c5aa993b JM |
263 | case ST_STORAGE: |
264 | case ST_DATA: | |
265 | symname = bufp->name.n_strx + stringtab; | |
266 | bufp->symbol_value += data_offset; | |
267 | ms_type = mst_data; | |
268 | break; | |
269 | ||
270 | default: | |
271 | continue; | |
c906108c SS |
272 | } |
273 | break; | |
274 | ||
275 | default: | |
276 | continue; | |
277 | } | |
278 | ||
279 | if (bufp->name.n_strx > obj_som_stringtab_size (abfd)) | |
8a3fe4f8 | 280 | error (_("Invalid symbol data; bad HP string table offset: %d"), |
c906108c SS |
281 | bufp->name.n_strx); |
282 | ||
c5aa993b | 283 | prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type, |
c906108c SS |
284 | objfile); |
285 | } | |
286 | } | |
287 | ||
288 | /* Scan and build partial symbols for a symbol file. | |
289 | We have been initialized by a call to som_symfile_init, which | |
290 | currently does nothing. | |
291 | ||
292 | SECTION_OFFSETS is a set of offsets to apply to relocate the symbols | |
293 | in each section. This is ignored, as it isn't needed for SOM. | |
294 | ||
295 | MAINLINE is true if we are reading the main symbol | |
296 | table (as opposed to a shared lib or dynamically loaded file). | |
297 | ||
298 | This function only does the minimum work necessary for letting the | |
299 | user "name" things symbolically; it does not read the entire symtab. | |
300 | Instead, it reads the external and static symbols and puts them in partial | |
301 | symbol tables. When more extensive information is requested of a | |
302 | file, the corresponding partial symbol table is mutated into a full | |
303 | fledged symbol table by going back and reading the symbols | |
304 | for real. | |
305 | ||
306 | We look for sections with specific names, to tell us what debug | |
307 | format to look for: FIXME!!! | |
308 | ||
309 | somstab_build_psymtabs() handles STABS symbols. | |
310 | ||
311 | Note that SOM files have a "minimal" symbol table, which is vaguely | |
312 | reminiscent of a COFF symbol table, but has only the minimal information | |
313 | necessary for linking. We process this also, and use the information to | |
314 | build gdb's minimal symbol table. This gives us some minimal debugging | |
315 | capability even for files compiled without -g. */ | |
316 | ||
317 | static void | |
fba45db2 | 318 | som_symfile_read (struct objfile *objfile, int mainline) |
c906108c SS |
319 | { |
320 | bfd *abfd = objfile->obfd; | |
321 | struct cleanup *back_to; | |
322 | ||
323 | do_pxdb (symfile_bfd_open (objfile->name)); | |
324 | ||
325 | init_minimal_symbol_collection (); | |
56e290f4 | 326 | back_to = make_cleanup_discard_minimal_symbols (); |
c906108c SS |
327 | |
328 | /* Read in the import list and the export list. Currently | |
329 | the export list isn't used; the import list is used in | |
330 | hp-symtab-read.c to handle static vars declared in other | |
331 | shared libraries. */ | |
332 | init_import_symbols (objfile); | |
c5aa993b | 333 | #if 0 /* Export symbols not used today 1997-08-05 */ |
c906108c SS |
334 | init_export_symbols (objfile); |
335 | #else | |
336 | objfile->export_list = NULL; | |
337 | objfile->export_list_size = 0; | |
338 | #endif | |
339 | ||
340 | /* Process the normal SOM symbol table first. | |
341 | This reads in the DNTT and string table, but doesn't | |
342 | actually scan the DNTT. It does scan the linker symbol | |
343 | table and thus build up a "minimal symbol table". */ | |
c5aa993b | 344 | |
96baa820 | 345 | som_symtab_read (abfd, objfile, objfile->section_offsets); |
c906108c | 346 | |
7134143f DJ |
347 | /* Install any minimal symbols that have been collected as the current |
348 | minimal symbols for this objfile. | |
349 | Further symbol-reading is done incrementally, file-by-file, | |
350 | in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c | |
351 | contains the code to do the actual DNTT scanning and symtab building. */ | |
352 | install_minimal_symbols (objfile); | |
353 | do_cleanups (back_to); | |
354 | ||
c906108c | 355 | /* Now read information from the stabs debug sections. |
4897bfb9 | 356 | This is emitted by gcc. */ |
96baa820 | 357 | stabsect_build_psymtabs (objfile, mainline, |
c906108c SS |
358 | "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$"); |
359 | ||
360 | /* Now read the native debug information. | |
361 | This builds the psymtab. This used to be done via a scan of | |
362 | the DNTT, but is now done via the PXDB-built quick-lookup tables | |
363 | together with a scan of the GNTT. See hp-psymtab-read.c. */ | |
d4f3574e | 364 | hpread_build_psymtabs (objfile, mainline); |
c906108c SS |
365 | } |
366 | ||
367 | /* Initialize anything that needs initializing when a completely new symbol | |
368 | file is specified (not just adding some symbols from another file, e.g. a | |
369 | shared library). | |
370 | ||
371 | We reinitialize buildsym, since we may be reading stabs from a SOM file. */ | |
372 | ||
373 | static void | |
fba45db2 | 374 | som_new_init (struct objfile *ignore) |
c906108c SS |
375 | { |
376 | stabsread_new_init (); | |
377 | buildsym_new_init (); | |
378 | } | |
379 | ||
380 | /* Perform any local cleanups required when we are done with a particular | |
381 | objfile. I.E, we are in the process of discarding all symbol information | |
382 | for an objfile, freeing up all memory held for it, and unlinking the | |
383 | objfile struct from the global list of known objfiles. */ | |
384 | ||
385 | static void | |
fba45db2 | 386 | som_symfile_finish (struct objfile *objfile) |
c906108c | 387 | { |
0a6ddd08 | 388 | if (objfile->deprecated_sym_stab_info != NULL) |
c906108c | 389 | { |
0a6ddd08 | 390 | xfree (objfile->deprecated_sym_stab_info); |
c906108c SS |
391 | } |
392 | hpread_symfile_finish (objfile); | |
393 | } | |
394 | ||
395 | /* SOM specific initialization routine for reading symbols. */ | |
396 | ||
397 | static void | |
fba45db2 | 398 | som_symfile_init (struct objfile *objfile) |
c906108c SS |
399 | { |
400 | /* SOM objects may be reordered, so set OBJF_REORDERED. If we | |
401 | find this causes a significant slowdown in gdb then we could | |
402 | set it in the debug symbol readers only when necessary. */ | |
403 | objfile->flags |= OBJF_REORDERED; | |
404 | hpread_symfile_init (objfile); | |
405 | } | |
406 | ||
407 | /* SOM specific parsing routine for section offsets. | |
408 | ||
409 | Plain and simple for now. */ | |
410 | ||
d4f3574e | 411 | static void |
fba45db2 | 412 | som_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs) |
c906108c | 413 | { |
c906108c | 414 | int i; |
0aa9cf96 | 415 | CORE_ADDR text_addr; |
c906108c | 416 | |
a39a16c4 | 417 | objfile->num_sections = bfd_count_sections (objfile->obfd); |
d4f3574e | 418 | objfile->section_offsets = (struct section_offsets *) |
8b92e4d5 | 419 | obstack_alloc (&objfile->objfile_obstack, |
a39a16c4 | 420 | SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
c906108c | 421 | |
b8fbeb18 EZ |
422 | /* FIXME: ezannoni 2000-04-20 The section names in SOM are not |
423 | .text, .data, etc, but $TEXT$, $DATA$,... We should initialize | |
424 | SET_OFF_* from bfd. (See default_symfile_offsets()). But I don't | |
425 | know the correspondence between SOM sections and GDB's idea of | |
426 | section names. So for now we default to what is was before these | |
427 | changes.*/ | |
428 | objfile->sect_index_text = 0; | |
429 | objfile->sect_index_data = 1; | |
430 | objfile->sect_index_bss = 2; | |
431 | objfile->sect_index_rodata = 3; | |
432 | ||
c906108c | 433 | /* First see if we're a shared library. If so, get the section |
2acceee2 | 434 | offsets from the library, else get them from addrs. */ |
d4f3574e | 435 | if (!som_solib_section_offsets (objfile, objfile->section_offsets)) |
c906108c | 436 | { |
b8fbeb18 EZ |
437 | /* Note: Here is OK to compare with ".text" because this is the |
438 | name that gdb itself gives to that section, not the SOM | |
439 | name. */ | |
8d498949 | 440 | for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
0aa9cf96 EZ |
441 | if (strcmp (addrs->other[i].name, ".text") == 0) |
442 | break; | |
443 | text_addr = addrs->other[i].addr; | |
444 | ||
a39a16c4 | 445 | for (i = 0; i < objfile->num_sections; i++) |
f0a58b0b | 446 | (objfile->section_offsets)->offsets[i] = text_addr; |
c906108c | 447 | } |
c906108c SS |
448 | } |
449 | ||
c906108c SS |
450 | /* Read in and initialize the SOM import list which is present |
451 | for all executables and shared libraries. The import list | |
452 | consists of the symbols that are referenced in OBJFILE but | |
453 | not defined there. (Variables that are imported are dealt | |
454 | with as "loc_indirect" vars.) | |
455 | Return value = number of import symbols read in. */ | |
65e82032 | 456 | static int |
fba45db2 | 457 | init_import_symbols (struct objfile *objfile) |
c906108c SS |
458 | { |
459 | unsigned int import_list; | |
460 | unsigned int import_list_size; | |
461 | unsigned int string_table; | |
462 | unsigned int string_table_size; | |
c5aa993b | 463 | char *string_buffer; |
52f0bd74 AC |
464 | int i; |
465 | int j; | |
466 | int k; | |
c5aa993b JM |
467 | asection *text_section; /* section handle */ |
468 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
469 | |
470 | /* A struct for an entry in the SOM import list */ | |
c5aa993b JM |
471 | typedef struct |
472 | { | |
473 | int name; /* index into the string table */ | |
474 | short dont_care1; /* we don't use this */ | |
475 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
476 | unsigned int reserved2:8; /* not used */ | |
477 | } | |
478 | SomImportEntry; | |
479 | ||
480 | /* We read 100 entries in at a time from the disk file. */ | |
481 | #define SOM_READ_IMPORTS_NUM 100 | |
482 | #define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM) | |
c906108c | 483 | SomImportEntry buffer[SOM_READ_IMPORTS_NUM]; |
c5aa993b | 484 | |
c906108c SS |
485 | /* Initialize in case we error out */ |
486 | objfile->import_list = NULL; | |
487 | objfile->import_list_size = 0; | |
488 | ||
c906108c | 489 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 490 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
491 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
492 | if (!text_section) | |
493 | return 0; | |
c5aa993b | 494 | /* Get the SOM executable header */ |
c906108c SS |
495 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
496 | ||
497 | /* Check header version number for 10.x HP-UX */ | |
498 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 499 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
500 | if (dl_header[0] != 93092112) |
501 | return 0; | |
c5aa993b JM |
502 | |
503 | import_list = dl_header[4]; | |
c906108c SS |
504 | import_list_size = dl_header[5]; |
505 | if (!import_list_size) | |
506 | return 0; | |
c5aa993b | 507 | string_table = dl_header[10]; |
c906108c SS |
508 | string_table_size = dl_header[11]; |
509 | if (!string_table_size) | |
510 | return 0; | |
511 | ||
c5aa993b | 512 | /* Suck in SOM string table */ |
c906108c SS |
513 | string_buffer = (char *) xmalloc (string_table_size); |
514 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 515 | string_table, string_table_size); |
c906108c SS |
516 | |
517 | /* Allocate import list in the psymbol obstack; this has nothing | |
518 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 519 | import list to be freed when the objfile is deallocated */ |
c906108c | 520 | objfile->import_list |
8b92e4d5 | 521 | = (ImportEntry *) obstack_alloc (&objfile->objfile_obstack, |
c5aa993b | 522 | import_list_size * sizeof (ImportEntry)); |
c906108c | 523 | |
c5aa993b JM |
524 | /* Read in the import entries, a bunch at a time */ |
525 | for (j = 0, k = 0; | |
c906108c SS |
526 | j < (import_list_size / SOM_READ_IMPORTS_NUM); |
527 | j++) | |
528 | { | |
529 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
530 | import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE, |
531 | SOM_READ_IMPORTS_CHUNK_SIZE); | |
532 | for (i = 0; i < SOM_READ_IMPORTS_NUM; i++, k++) | |
533 | { | |
534 | if (buffer[i].type != (unsigned char) 0) | |
535 | { | |
536 | objfile->import_list[k] | |
8b92e4d5 | 537 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
c5aa993b JM |
538 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); |
539 | /* Some day we might want to record the type and other information too */ | |
540 | } | |
541 | else /* null type */ | |
542 | objfile->import_list[k] = NULL; | |
543 | ||
544 | } | |
c906108c SS |
545 | } |
546 | ||
c5aa993b | 547 | /* Get the leftovers */ |
c906108c SS |
548 | if (k < import_list_size) |
549 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
550 | import_list + k * sizeof (SomImportEntry), |
551 | (import_list_size - k) * sizeof (SomImportEntry)); | |
552 | for (i = 0; k < import_list_size; i++, k++) | |
c906108c SS |
553 | { |
554 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
555 | { |
556 | objfile->import_list[k] | |
8b92e4d5 | 557 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
c5aa993b JM |
558 | strcpy (objfile->import_list[k], string_buffer + buffer[i].name); |
559 | /* Some day we might want to record the type and other information too */ | |
560 | } | |
c906108c | 561 | else |
c5aa993b | 562 | objfile->import_list[k] = NULL; |
c906108c SS |
563 | } |
564 | ||
565 | objfile->import_list_size = import_list_size; | |
b8c9b27d | 566 | xfree (string_buffer); |
c906108c SS |
567 | return import_list_size; |
568 | } | |
569 | ||
570 | /* Read in and initialize the SOM export list which is present | |
571 | for all executables and shared libraries. The import list | |
572 | consists of the symbols that are referenced in OBJFILE but | |
573 | not defined there. (Variables that are imported are dealt | |
574 | with as "loc_indirect" vars.) | |
575 | Return value = number of import symbols read in. */ | |
576 | int | |
fba45db2 | 577 | init_export_symbols (struct objfile *objfile) |
c906108c SS |
578 | { |
579 | unsigned int export_list; | |
580 | unsigned int export_list_size; | |
581 | unsigned int string_table; | |
582 | unsigned int string_table_size; | |
c5aa993b | 583 | char *string_buffer; |
52f0bd74 AC |
584 | int i; |
585 | int j; | |
586 | int k; | |
c5aa993b JM |
587 | asection *text_section; /* section handle */ |
588 | unsigned int dl_header[12]; /* SOM executable header */ | |
c906108c SS |
589 | |
590 | /* A struct for an entry in the SOM export list */ | |
c5aa993b JM |
591 | typedef struct |
592 | { | |
593 | int next; /* for hash table use -- we don't use this */ | |
594 | int name; /* index into string table */ | |
595 | int value; /* offset or plabel */ | |
596 | int dont_care1; /* not used */ | |
597 | unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */ | |
598 | char dont_care2; /* not used */ | |
599 | short dont_care3; /* not used */ | |
600 | } | |
601 | SomExportEntry; | |
602 | ||
603 | /* We read 100 entries in at a time from the disk file. */ | |
604 | #define SOM_READ_EXPORTS_NUM 100 | |
605 | #define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM) | |
c906108c SS |
606 | SomExportEntry buffer[SOM_READ_EXPORTS_NUM]; |
607 | ||
608 | /* Initialize in case we error out */ | |
609 | objfile->export_list = NULL; | |
610 | objfile->export_list_size = 0; | |
611 | ||
c906108c | 612 | /* It doesn't work, for some reason, to read in space $TEXT$; |
c5aa993b | 613 | the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */ |
c906108c SS |
614 | text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$"); |
615 | if (!text_section) | |
616 | return 0; | |
c5aa993b | 617 | /* Get the SOM executable header */ |
c906108c SS |
618 | bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int)); |
619 | ||
620 | /* Check header version number for 10.x HP-UX */ | |
621 | /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912. | |
c5aa993b | 622 | FIXME: Change for future HP-UX releases and mods to the SOM executable format */ |
c906108c SS |
623 | if (dl_header[0] != 93092112) |
624 | return 0; | |
c5aa993b JM |
625 | |
626 | export_list = dl_header[8]; | |
627 | export_list_size = dl_header[9]; | |
c906108c SS |
628 | if (!export_list_size) |
629 | return 0; | |
c5aa993b | 630 | string_table = dl_header[10]; |
c906108c SS |
631 | string_table_size = dl_header[11]; |
632 | if (!string_table_size) | |
633 | return 0; | |
634 | ||
c5aa993b | 635 | /* Suck in SOM string table */ |
c906108c SS |
636 | string_buffer = (char *) xmalloc (string_table_size); |
637 | bfd_get_section_contents (objfile->obfd, text_section, string_buffer, | |
c5aa993b | 638 | string_table, string_table_size); |
c906108c SS |
639 | |
640 | /* Allocate export list in the psymbol obstack; this has nothing | |
641 | to do with psymbols, just a matter of convenience. We want the | |
c5aa993b | 642 | export list to be freed when the objfile is deallocated */ |
c906108c | 643 | objfile->export_list |
8b92e4d5 | 644 | = (ExportEntry *) obstack_alloc (&objfile->objfile_obstack, |
c5aa993b | 645 | export_list_size * sizeof (ExportEntry)); |
c906108c | 646 | |
c5aa993b JM |
647 | /* Read in the export entries, a bunch at a time */ |
648 | for (j = 0, k = 0; | |
c906108c SS |
649 | j < (export_list_size / SOM_READ_EXPORTS_NUM); |
650 | j++) | |
651 | { | |
652 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
653 | export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE, |
654 | SOM_READ_EXPORTS_CHUNK_SIZE); | |
655 | for (i = 0; i < SOM_READ_EXPORTS_NUM; i++, k++) | |
656 | { | |
657 | if (buffer[i].type != (unsigned char) 0) | |
658 | { | |
659 | objfile->export_list[k].name | |
8b92e4d5 | 660 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
c5aa993b JM |
661 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); |
662 | objfile->export_list[k].address = buffer[i].value; | |
663 | /* Some day we might want to record the type and other information too */ | |
664 | } | |
665 | else | |
666 | /* null type */ | |
667 | { | |
668 | objfile->export_list[k].name = NULL; | |
669 | objfile->export_list[k].address = 0; | |
670 | } | |
671 | } | |
c906108c SS |
672 | } |
673 | ||
c5aa993b | 674 | /* Get the leftovers */ |
c906108c SS |
675 | if (k < export_list_size) |
676 | bfd_get_section_contents (objfile->obfd, text_section, buffer, | |
c5aa993b JM |
677 | export_list + k * sizeof (SomExportEntry), |
678 | (export_list_size - k) * sizeof (SomExportEntry)); | |
679 | for (i = 0; k < export_list_size; i++, k++) | |
c906108c SS |
680 | { |
681 | if (buffer[i].type != (unsigned char) 0) | |
c5aa993b JM |
682 | { |
683 | objfile->export_list[k].name | |
8b92e4d5 | 684 | = (char *) obstack_alloc (&objfile->objfile_obstack, strlen (string_buffer + buffer[i].name) + 1); |
c5aa993b JM |
685 | strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name); |
686 | /* Some day we might want to record the type and other information too */ | |
687 | objfile->export_list[k].address = buffer[i].value; | |
688 | } | |
c906108c | 689 | else |
c5aa993b JM |
690 | { |
691 | objfile->export_list[k].name = NULL; | |
692 | objfile->export_list[k].address = 0; | |
693 | } | |
c906108c SS |
694 | } |
695 | ||
696 | objfile->export_list_size = export_list_size; | |
b8c9b27d | 697 | xfree (string_buffer); |
c906108c SS |
698 | return export_list_size; |
699 | } | |
c5aa993b | 700 | \f |
c906108c SS |
701 | |
702 | ||
c906108c SS |
703 | /* Register that we are able to handle SOM object file formats. */ |
704 | ||
705 | static struct sym_fns som_sym_fns = | |
706 | { | |
707 | bfd_target_som_flavour, | |
c5aa993b JM |
708 | som_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
709 | som_symfile_init, /* sym_init: read initial info, setup for sym_read() */ | |
710 | som_symfile_read, /* sym_read: read a symbol file into symtab */ | |
711 | som_symfile_finish, /* sym_finish: finished with file, cleanup */ | |
712 | som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */ | |
713 | NULL /* next: pointer to next struct sym_fns */ | |
c906108c SS |
714 | }; |
715 | ||
716 | void | |
fba45db2 | 717 | _initialize_somread (void) |
c906108c SS |
718 | { |
719 | add_symtab_fns (&som_sym_fns); | |
720 | } |