Commit | Line | Data |
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fbdbf38b | 1 | /* Handle SOM shared libraries. |
419b8bfb | 2 | |
9b254dd1 | 3 | Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc. |
419b8bfb RC |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
419b8bfb RC |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
419b8bfb RC |
19 | |
20 | #include "defs.h" | |
419b8bfb RC |
21 | #include "symtab.h" |
22 | #include "bfd.h" | |
23 | #include "symfile.h" | |
24 | #include "objfiles.h" | |
25 | #include "gdbcore.h" | |
26 | #include "target.h" | |
27 | #include "inferior.h" | |
28 | ||
29 | #include "hppa-tdep.h" | |
30 | #include "solist.h" | |
d542061a | 31 | #include "solib.h" |
419b8bfb RC |
32 | |
33 | #undef SOLIB_SOM_DBG | |
34 | ||
35 | /* These ought to be defined in some public interface, but aren't. They | |
36 | define the meaning of the various bits in the distinguished __dld_flags | |
37 | variable that is declared in every debuggable a.out on HP-UX, and that | |
38 | is shared between the debugger and the dynamic linker. | |
39 | */ | |
40 | #define DLD_FLAGS_MAPPRIVATE 0x1 | |
41 | #define DLD_FLAGS_HOOKVALID 0x2 | |
42 | #define DLD_FLAGS_LISTVALID 0x4 | |
43 | #define DLD_FLAGS_BOR_ENABLE 0x8 | |
44 | ||
45 | struct lm_info | |
46 | { | |
47 | /* Version of this structure (it is expected to change again in hpux10). */ | |
48 | unsigned char struct_version; | |
49 | ||
50 | /* Binding mode for this library. */ | |
51 | unsigned char bind_mode; | |
52 | ||
53 | /* Version of this library. */ | |
54 | short library_version; | |
55 | ||
56 | /* Start of text address, | |
57 | link-time text location (length of text area), | |
58 | end of text address. */ | |
59 | CORE_ADDR text_addr; | |
60 | CORE_ADDR text_link_addr; | |
61 | CORE_ADDR text_end; | |
62 | ||
63 | /* Start of data, start of bss and end of data. */ | |
64 | CORE_ADDR data_start; | |
65 | CORE_ADDR bss_start; | |
66 | CORE_ADDR data_end; | |
67 | ||
68 | /* Value of linkage pointer (%r19). */ | |
69 | CORE_ADDR got_value; | |
70 | ||
71 | /* Address in target of offset from thread-local register of | |
72 | start of this thread's data. I.e., the first thread-local | |
73 | variable in this shared library starts at *(tsd_start_addr) | |
74 | from that area pointed to by cr27 (mpsfu_hi). | |
75 | ||
76 | We do the indirection as soon as we read it, so from then | |
77 | on it's the offset itself. */ | |
78 | CORE_ADDR tsd_start_addr; | |
79 | ||
80 | /* Address of the link map entry in the loader. */ | |
81 | CORE_ADDR lm_addr; | |
82 | }; | |
83 | ||
84 | /* These addresses should be filled in by som_solib_create_inferior_hook. | |
85 | They are also used elsewhere in this module. | |
86 | */ | |
87 | typedef struct | |
88 | { | |
89 | CORE_ADDR address; | |
90 | struct unwind_table_entry *unwind; | |
91 | } | |
92 | addr_and_unwind_t; | |
93 | ||
94 | /* When adding fields, be sure to clear them in _initialize_som_solib. */ | |
95 | static struct | |
96 | { | |
97 | int is_valid; | |
98 | addr_and_unwind_t hook; | |
99 | addr_and_unwind_t hook_stub; | |
100 | addr_and_unwind_t load; | |
101 | addr_and_unwind_t load_stub; | |
102 | addr_and_unwind_t unload; | |
103 | addr_and_unwind_t unload2; | |
104 | addr_and_unwind_t unload_stub; | |
105 | } | |
106 | dld_cache; | |
107 | ||
108 | static void | |
109 | som_relocate_section_addresses (struct so_list *so, | |
110 | struct section_table *sec) | |
111 | { | |
112 | flagword aflag = bfd_get_section_flags(so->abfd, sec->the_bfd_section); | |
113 | ||
419b8bfb RC |
114 | if (aflag & SEC_CODE) |
115 | { | |
116 | sec->addr += so->lm_info->text_addr - so->lm_info->text_link_addr; | |
117 | sec->endaddr += so->lm_info->text_addr - so->lm_info->text_link_addr; | |
118 | } | |
119 | else if (aflag & SEC_DATA) | |
120 | { | |
121 | sec->addr += so->lm_info->data_start; | |
122 | sec->endaddr += so->lm_info->data_start; | |
123 | } | |
124 | else | |
125 | ; | |
126 | } | |
127 | ||
128 | /* This hook gets called just before the first instruction in the | |
129 | inferior process is executed. | |
130 | ||
131 | This is our opportunity to set magic flags in the inferior so | |
132 | that GDB can be notified when a shared library is mapped in and | |
133 | to tell the dynamic linker that a private copy of the library is | |
134 | needed (so GDB can set breakpoints in the library). | |
135 | ||
136 | __dld_flags is the location of the magic flags; as of this implementation | |
137 | there are 3 flags of interest: | |
138 | ||
139 | bit 0 when set indicates that private copies of the libraries are needed | |
140 | bit 1 when set indicates that the callback hook routine is valid | |
141 | bit 2 when set indicates that the dynamic linker should maintain the | |
142 | __dld_list structure when loading/unloading libraries. | |
143 | ||
144 | Note that shared libraries are not mapped in at this time, so we have | |
145 | run the inferior until the libraries are mapped in. Typically this | |
146 | means running until the "_start" is called. */ | |
147 | ||
148 | static void | |
149 | som_solib_create_inferior_hook (void) | |
150 | { | |
151 | struct minimal_symbol *msymbol; | |
152 | unsigned int dld_flags, status, have_endo; | |
153 | asection *shlib_info; | |
154 | char buf[4]; | |
419b8bfb RC |
155 | CORE_ADDR anaddr; |
156 | ||
157 | /* First, remove all the solib event breakpoints. Their addresses | |
158 | may have changed since the last time we ran the program. */ | |
159 | remove_solib_event_breakpoints (); | |
160 | ||
161 | if (symfile_objfile == NULL) | |
162 | return; | |
163 | ||
164 | /* First see if the objfile was dynamically linked. */ | |
165 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); | |
166 | if (!shlib_info) | |
167 | return; | |
168 | ||
169 | /* It's got a $SHLIB_INFO$ section, make sure it's not empty. */ | |
170 | if (bfd_section_size (symfile_objfile->obfd, shlib_info) == 0) | |
171 | return; | |
172 | ||
173 | have_endo = 0; | |
174 | /* Slam the pid of the process into __d_pid. | |
175 | ||
176 | We used to warn when this failed, but that warning is only useful | |
177 | on very old HP systems (hpux9 and older). The warnings are an | |
178 | annoyance to users of modern systems and foul up the testsuite as | |
179 | well. As a result, the warnings have been disabled. */ | |
180 | msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile); | |
181 | if (msymbol == NULL) | |
182 | goto keep_going; | |
183 | ||
184 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
185 | store_unsigned_integer (buf, 4, PIDGET (inferior_ptid)); | |
186 | status = target_write_memory (anaddr, buf, 4); | |
187 | if (status != 0) | |
188 | { | |
8a3fe4f8 AC |
189 | warning (_("\ |
190 | Unable to write __d_pid.\n\ | |
191 | Suggest linking with /opt/langtools/lib/end.o.\n\ | |
192 | GDB will be unable to track shl_load/shl_unload calls")); | |
419b8bfb RC |
193 | goto keep_going; |
194 | } | |
195 | ||
196 | /* Get the value of _DLD_HOOK (an export stub) and put it in __dld_hook; | |
197 | This will force the dynamic linker to call __d_trap when significant | |
198 | events occur. | |
199 | ||
200 | Note that the above is the pre-HP-UX 9.0 behaviour. At 9.0 and above, | |
201 | the dld provides an export stub named "__d_trap" as well as the | |
202 | function named "__d_trap" itself, but doesn't provide "_DLD_HOOK". | |
203 | We'll look first for the old flavor and then the new. | |
204 | */ | |
205 | msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile); | |
206 | if (msymbol == NULL) | |
207 | msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile); | |
208 | if (msymbol == NULL) | |
209 | { | |
8a3fe4f8 AC |
210 | warning (_("\ |
211 | Unable to find _DLD_HOOK symbol in object file.\n\ | |
212 | Suggest linking with /opt/langtools/lib/end.o.\n\ | |
213 | GDB will be unable to track shl_load/shl_unload calls")); | |
419b8bfb RC |
214 | goto keep_going; |
215 | } | |
216 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
217 | dld_cache.hook.address = anaddr; | |
218 | ||
219 | /* Grrr, this might not be an export symbol! We have to find the | |
220 | export stub. */ | |
ff644745 JB |
221 | msymbol = hppa_lookup_stub_minimal_symbol (SYMBOL_LINKAGE_NAME (msymbol), |
222 | EXPORT); | |
223 | if (msymbol != NULL) | |
224 | { | |
225 | anaddr = SYMBOL_VALUE (msymbol); | |
226 | dld_cache.hook_stub.address = anaddr; | |
227 | } | |
419b8bfb RC |
228 | store_unsigned_integer (buf, 4, anaddr); |
229 | ||
230 | msymbol = lookup_minimal_symbol ("__dld_hook", NULL, symfile_objfile); | |
231 | if (msymbol == NULL) | |
232 | { | |
8a3fe4f8 AC |
233 | warning (_("\ |
234 | Unable to find __dld_hook symbol in object file.\n\ | |
235 | Suggest linking with /opt/langtools/lib/end.o.\n\ | |
236 | GDB will be unable to track shl_load/shl_unload calls")); | |
419b8bfb RC |
237 | goto keep_going; |
238 | } | |
239 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
240 | status = target_write_memory (anaddr, buf, 4); | |
241 | ||
242 | /* Now set a shlib_event breakpoint at __d_trap so we can track | |
243 | significant shared library events. */ | |
244 | msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile); | |
245 | if (msymbol == NULL) | |
246 | { | |
a3f17187 | 247 | warning (_("\ |
8a3fe4f8 AC |
248 | Unable to find __dld_d_trap symbol in object file.\n\ |
249 | Suggest linking with /opt/langtools/lib/end.o.\n\ | |
250 | GDB will be unable to track shl_load/shl_unload calls")); | |
419b8bfb RC |
251 | goto keep_going; |
252 | } | |
253 | create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol)); | |
254 | ||
255 | /* We have all the support usually found in end.o, so we can track | |
256 | shl_load and shl_unload calls. */ | |
257 | have_endo = 1; | |
258 | ||
259 | keep_going: | |
260 | ||
261 | /* Get the address of __dld_flags, if no such symbol exists, then we can | |
262 | not debug the shared code. */ | |
263 | msymbol = lookup_minimal_symbol ("__dld_flags", NULL, NULL); | |
264 | if (msymbol == NULL) | |
265 | { | |
8a3fe4f8 | 266 | error (_("Unable to find __dld_flags symbol in object file.")); |
419b8bfb RC |
267 | } |
268 | ||
269 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
270 | ||
271 | /* Read the current contents. */ | |
272 | status = target_read_memory (anaddr, buf, 4); | |
273 | if (status != 0) | |
8a3fe4f8 | 274 | error (_("Unable to read __dld_flags.")); |
419b8bfb RC |
275 | dld_flags = extract_unsigned_integer (buf, 4); |
276 | ||
277 | /* Turn on the flags we care about. */ | |
278 | dld_flags |= DLD_FLAGS_MAPPRIVATE; | |
279 | if (have_endo) | |
280 | dld_flags |= DLD_FLAGS_HOOKVALID; | |
281 | store_unsigned_integer (buf, 4, dld_flags); | |
282 | status = target_write_memory (anaddr, buf, 4); | |
283 | if (status != 0) | |
8a3fe4f8 | 284 | error (_("Unable to write __dld_flags.")); |
419b8bfb RC |
285 | |
286 | /* Now find the address of _start and set a breakpoint there. | |
287 | We still need this code for two reasons: | |
288 | ||
289 | * Not all sites have /opt/langtools/lib/end.o, so it's not always | |
290 | possible to track the dynamic linker's events. | |
291 | ||
292 | * At this time no events are triggered for shared libraries | |
293 | loaded at startup time (what a crock). */ | |
294 | ||
295 | msymbol = lookup_minimal_symbol ("_start", NULL, symfile_objfile); | |
296 | if (msymbol == NULL) | |
8a3fe4f8 | 297 | error (_("Unable to find _start symbol in object file.")); |
419b8bfb RC |
298 | |
299 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
300 | ||
301 | /* Make the breakpoint at "_start" a shared library event breakpoint. */ | |
302 | create_solib_event_breakpoint (anaddr); | |
303 | ||
304 | clear_symtab_users (); | |
305 | } | |
306 | ||
419b8bfb RC |
307 | static void |
308 | som_special_symbol_handling (void) | |
309 | { | |
310 | } | |
311 | ||
312 | static void | |
313 | som_solib_desire_dynamic_linker_symbols (void) | |
314 | { | |
315 | struct objfile *objfile; | |
316 | struct unwind_table_entry *u; | |
317 | struct minimal_symbol *dld_msymbol; | |
318 | ||
319 | /* Do we already know the value of these symbols? If so, then | |
320 | we've no work to do. | |
321 | ||
322 | (If you add clauses to this test, be sure to likewise update the | |
323 | test within the loop.) | |
324 | */ | |
325 | if (dld_cache.is_valid) | |
326 | return; | |
327 | ||
328 | ALL_OBJFILES (objfile) | |
329 | { | |
330 | dld_msymbol = lookup_minimal_symbol ("shl_load", NULL, objfile); | |
331 | if (dld_msymbol != NULL) | |
332 | { | |
333 | dld_cache.load.address = SYMBOL_VALUE (dld_msymbol); | |
334 | dld_cache.load.unwind = find_unwind_entry (dld_cache.load.address); | |
335 | } | |
336 | ||
337 | dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_load", | |
338 | objfile); | |
339 | if (dld_msymbol != NULL) | |
340 | { | |
341 | if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline) | |
342 | { | |
343 | u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol)); | |
344 | if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT)) | |
345 | { | |
346 | dld_cache.load_stub.address = SYMBOL_VALUE (dld_msymbol); | |
347 | dld_cache.load_stub.unwind = u; | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
352 | dld_msymbol = lookup_minimal_symbol ("shl_unload", NULL, objfile); | |
353 | if (dld_msymbol != NULL) | |
354 | { | |
355 | dld_cache.unload.address = SYMBOL_VALUE (dld_msymbol); | |
356 | dld_cache.unload.unwind = find_unwind_entry (dld_cache.unload.address); | |
357 | ||
358 | /* ??rehrauer: I'm not sure exactly what this is, but it appears | |
359 | that on some HPUX 10.x versions, there's two unwind regions to | |
360 | cover the body of "shl_unload", the second being 4 bytes past | |
361 | the end of the first. This is a large hack to handle that | |
362 | case, but since I don't seem to have any legitimate way to | |
363 | look for this thing via the symbol table... | |
364 | */ | |
365 | if (dld_cache.unload.unwind != NULL) | |
366 | { | |
367 | u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4); | |
368 | if (u != NULL) | |
369 | { | |
370 | dld_cache.unload2.address = u->region_start; | |
371 | dld_cache.unload2.unwind = u; | |
372 | } | |
373 | } | |
374 | } | |
375 | ||
376 | dld_msymbol = lookup_minimal_symbol_solib_trampoline ("shl_unload", | |
377 | objfile); | |
378 | if (dld_msymbol != NULL) | |
379 | { | |
380 | if (SYMBOL_TYPE (dld_msymbol) == mst_solib_trampoline) | |
381 | { | |
382 | u = find_unwind_entry (SYMBOL_VALUE (dld_msymbol)); | |
383 | if ((u != NULL) && (u->stub_unwind.stub_type == EXPORT)) | |
384 | { | |
385 | dld_cache.unload_stub.address = SYMBOL_VALUE (dld_msymbol); | |
386 | dld_cache.unload_stub.unwind = u; | |
387 | } | |
388 | } | |
389 | } | |
390 | ||
391 | /* Did we find everything we were looking for? If so, stop. */ | |
392 | if ((dld_cache.load.address != 0) | |
393 | && (dld_cache.load_stub.address != 0) | |
394 | && (dld_cache.unload.address != 0) | |
395 | && (dld_cache.unload_stub.address != 0)) | |
396 | { | |
397 | dld_cache.is_valid = 1; | |
398 | break; | |
399 | } | |
400 | } | |
401 | ||
402 | dld_cache.hook.unwind = find_unwind_entry (dld_cache.hook.address); | |
403 | dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address); | |
404 | ||
405 | /* We're prepared not to find some of these symbols, which is why | |
406 | this function is a "desire" operation, and not a "require". | |
407 | */ | |
408 | } | |
409 | ||
410 | static int | |
411 | som_in_dynsym_resolve_code (CORE_ADDR pc) | |
412 | { | |
413 | struct unwind_table_entry *u_pc; | |
414 | ||
415 | /* Are we in the dld itself? | |
416 | ||
417 | ??rehrauer: Large hack -- We'll assume that any address in a | |
418 | shared text region is the dld's text. This would obviously | |
419 | fall down if the user attached to a process, whose shlibs | |
420 | weren't mapped to a (writeable) private region. However, in | |
421 | that case the debugger probably isn't able to set the fundamental | |
422 | breakpoint in the dld callback anyways, so this hack should be | |
423 | safe. | |
424 | */ | |
425 | if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000) | |
426 | return 1; | |
427 | ||
428 | /* Cache the address of some symbols that are part of the dynamic | |
429 | linker, if not already known. | |
430 | */ | |
431 | som_solib_desire_dynamic_linker_symbols (); | |
432 | ||
433 | /* Are we in the dld callback? Or its export stub? */ | |
434 | u_pc = find_unwind_entry (pc); | |
435 | if (u_pc == NULL) | |
436 | return 0; | |
437 | ||
438 | if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind)) | |
439 | return 1; | |
440 | ||
441 | /* Or the interface of the dld (i.e., "shl_load" or friends)? */ | |
442 | if ((u_pc == dld_cache.load.unwind) | |
443 | || (u_pc == dld_cache.unload.unwind) | |
444 | || (u_pc == dld_cache.unload2.unwind) | |
445 | || (u_pc == dld_cache.load_stub.unwind) | |
446 | || (u_pc == dld_cache.unload_stub.unwind)) | |
447 | return 1; | |
448 | ||
449 | /* Apparently this address isn't part of the dld's text. */ | |
450 | return 0; | |
451 | } | |
452 | ||
453 | static void | |
454 | som_clear_solib (void) | |
455 | { | |
456 | } | |
457 | ||
458 | struct dld_list { | |
459 | char name[4]; | |
460 | char info[4]; | |
461 | char text_addr[4]; | |
462 | char text_link_addr[4]; | |
463 | char text_end[4]; | |
464 | char data_start[4]; | |
465 | char bss_start[4]; | |
466 | char data_end[4]; | |
467 | char got_value[4]; | |
468 | char next[4]; | |
469 | char tsd_start_addr_ptr[4]; | |
470 | }; | |
471 | ||
472 | static CORE_ADDR | |
473 | link_map_start (void) | |
474 | { | |
475 | struct minimal_symbol *sym; | |
476 | CORE_ADDR addr; | |
477 | char buf[4]; | |
478 | unsigned int dld_flags; | |
479 | ||
480 | sym = lookup_minimal_symbol ("__dld_flags", NULL, NULL); | |
481 | if (!sym) | |
8a3fe4f8 | 482 | error (_("Unable to find __dld_flags symbol in object file.")); |
419b8bfb RC |
483 | addr = SYMBOL_VALUE_ADDRESS (sym); |
484 | read_memory (addr, buf, 4); | |
485 | dld_flags = extract_unsigned_integer (buf, 4); | |
486 | if ((dld_flags & DLD_FLAGS_LISTVALID) == 0) | |
8a3fe4f8 | 487 | error (_("__dld_list is not valid according to __dld_flags.")); |
419b8bfb RC |
488 | |
489 | /* If the libraries were not mapped private, warn the user. */ | |
490 | if ((dld_flags & DLD_FLAGS_MAPPRIVATE) == 0) | |
8a3fe4f8 | 491 | warning (_("The shared libraries were not privately mapped; setting a\n" |
419b8bfb | 492 | "breakpoint in a shared library will not work until you rerun the " |
8a3fe4f8 | 493 | "program.\n")); |
419b8bfb RC |
494 | |
495 | sym = lookup_minimal_symbol ("__dld_list", NULL, NULL); | |
496 | if (!sym) | |
497 | { | |
498 | /* Older crt0.o files (hpux8) don't have __dld_list as a symbol, | |
499 | but the data is still available if you know where to look. */ | |
500 | sym = lookup_minimal_symbol ("__dld_flags", NULL, NULL); | |
501 | if (!sym) | |
502 | { | |
8a3fe4f8 | 503 | error (_("Unable to find dynamic library list.")); |
419b8bfb RC |
504 | return 0; |
505 | } | |
506 | addr = SYMBOL_VALUE_ADDRESS (sym) - 8; | |
507 | } | |
508 | else | |
509 | addr = SYMBOL_VALUE_ADDRESS (sym); | |
510 | ||
511 | read_memory (addr, buf, 4); | |
512 | addr = extract_unsigned_integer (buf, 4); | |
513 | if (addr == 0) | |
7fc4b1a1 | 514 | return 0; |
419b8bfb RC |
515 | |
516 | read_memory (addr, buf, 4); | |
517 | return extract_unsigned_integer (buf, 4); | |
518 | } | |
519 | ||
520 | /* Does this so's name match the main binary? */ | |
521 | static int | |
522 | match_main (const char *name) | |
523 | { | |
524 | return strcmp (name, symfile_objfile->name) == 0; | |
525 | } | |
526 | ||
527 | static struct so_list * | |
528 | som_current_sos (void) | |
529 | { | |
530 | CORE_ADDR lm; | |
531 | struct so_list *head = 0; | |
532 | struct so_list **link_ptr = &head; | |
533 | ||
534 | for (lm = link_map_start (); lm; ) | |
535 | { | |
536 | char *namebuf; | |
537 | CORE_ADDR addr; | |
538 | struct so_list *new; | |
539 | struct cleanup *old_chain; | |
540 | int errcode; | |
541 | struct dld_list dbuf; | |
542 | char tsdbuf[4]; | |
543 | ||
544 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
545 | old_chain = make_cleanup (xfree, new); | |
546 | ||
547 | memset (new, 0, sizeof (*new)); | |
548 | new->lm_info = xmalloc (sizeof (struct lm_info)); | |
549 | make_cleanup (xfree, new->lm_info); | |
550 | ||
fbdbf38b | 551 | read_memory (lm, (gdb_byte *)&dbuf, sizeof (struct dld_list)); |
419b8bfb | 552 | |
fbdbf38b MK |
553 | addr = extract_unsigned_integer ((gdb_byte *)&dbuf.name, |
554 | sizeof (dbuf.name)); | |
419b8bfb RC |
555 | target_read_string (addr, &namebuf, SO_NAME_MAX_PATH_SIZE - 1, &errcode); |
556 | if (errcode != 0) | |
8a3fe4f8 AC |
557 | warning (_("Can't read pathname for load map: %s."), |
558 | safe_strerror (errcode)); | |
419b8bfb RC |
559 | else |
560 | { | |
561 | strncpy (new->so_name, namebuf, SO_NAME_MAX_PATH_SIZE - 1); | |
562 | new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0'; | |
563 | xfree (namebuf); | |
564 | strcpy (new->so_original_name, new->so_name); | |
565 | } | |
566 | ||
567 | if (new->so_name[0] && !match_main (new->so_name)) | |
568 | { | |
569 | struct lm_info *lmi = new->lm_info; | |
570 | unsigned int tmp; | |
571 | ||
572 | lmi->lm_addr = lm; | |
573 | ||
574 | #define EXTRACT(_fld) \ | |
fbdbf38b | 575 | extract_unsigned_integer ((gdb_byte *)&dbuf._fld, sizeof (dbuf._fld)); |
419b8bfb RC |
576 | |
577 | lmi->text_addr = EXTRACT (text_addr); | |
578 | tmp = EXTRACT (info); | |
579 | lmi->library_version = (tmp >> 16) & 0xffff; | |
580 | lmi->bind_mode = (tmp >> 8) & 0xff; | |
581 | lmi->struct_version = tmp & 0xff; | |
582 | lmi->text_link_addr = EXTRACT (text_link_addr); | |
583 | lmi->text_end = EXTRACT (text_end); | |
584 | lmi->data_start = EXTRACT (data_start); | |
585 | lmi->bss_start = EXTRACT (bss_start); | |
586 | lmi->data_end = EXTRACT (data_end); | |
587 | lmi->got_value = EXTRACT (got_value); | |
588 | tmp = EXTRACT (tsd_start_addr_ptr); | |
589 | read_memory (tmp, tsdbuf, 4); | |
590 | lmi->tsd_start_addr = extract_unsigned_integer (tsdbuf, 4); | |
591 | ||
592 | #ifdef SOLIB_SOM_DBG | |
593 | printf ("\n+ library \"%s\" is described at 0x%s\n", new->so_name, | |
594 | paddr_nz (lm)); | |
595 | printf (" 'version' is %d\n", new->lm_info->struct_version); | |
596 | printf (" 'bind_mode' is %d\n", new->lm_info->bind_mode); | |
597 | printf (" 'library_version' is %d\n", | |
598 | new->lm_info->library_version); | |
599 | printf (" 'text_addr' is 0x%s\n", | |
600 | paddr_nz (new->lm_info->text_addr)); | |
601 | printf (" 'text_link_addr' is 0x%s\n", | |
602 | paddr_nz (new->lm_info->text_link_addr)); | |
603 | printf (" 'text_end' is 0x%s\n", | |
604 | paddr_nz (new->lm_info->text_end)); | |
605 | printf (" 'data_start' is 0x%s\n", | |
606 | paddr_nz (new->lm_info->data_start)); | |
607 | printf (" 'bss_start' is 0x%s\n", | |
608 | paddr_nz (new->lm_info->bss_start)); | |
609 | printf (" 'data_end' is 0x%s\n", | |
610 | paddr_nz (new->lm_info->data_end)); | |
611 | printf (" 'got_value' is %s\n", | |
612 | paddr_nz (new->lm_info->got_value)); | |
613 | printf (" 'tsd_start_addr' is 0x%s\n", | |
614 | paddr_nz (new->lm_info->tsd_start_addr)); | |
615 | #endif | |
616 | ||
cfa9d6d9 DJ |
617 | new->addr_low = lmi->text_addr; |
618 | new->addr_high = lmi->text_end; | |
619 | ||
419b8bfb RC |
620 | /* Link the new object onto the list. */ |
621 | new->next = NULL; | |
622 | *link_ptr = new; | |
623 | link_ptr = &new->next; | |
624 | } | |
625 | else | |
626 | { | |
627 | free_so (new); | |
628 | } | |
629 | ||
630 | lm = EXTRACT (next); | |
631 | discard_cleanups (old_chain); | |
632 | #undef EXTRACT | |
633 | } | |
634 | ||
635 | /* TODO: The original somsolib code has logic to detect and eliminate | |
636 | duplicate entries. Do we need that? */ | |
637 | ||
638 | return head; | |
639 | } | |
640 | ||
641 | static int | |
642 | som_open_symbol_file_object (void *from_ttyp) | |
643 | { | |
644 | CORE_ADDR lm, l_name; | |
645 | char *filename; | |
646 | int errcode; | |
647 | int from_tty = *(int *)from_ttyp; | |
648 | char buf[4]; | |
649 | ||
650 | if (symfile_objfile) | |
651 | if (!query ("Attempt to reload symbols from process? ")) | |
652 | return 0; | |
653 | ||
654 | /* First link map member should be the executable. */ | |
655 | if ((lm = link_map_start ()) == 0) | |
656 | return 0; /* failed somehow... */ | |
657 | ||
658 | /* Read address of name from target memory to GDB. */ | |
659 | read_memory (lm + offsetof (struct dld_list, name), buf, 4); | |
660 | ||
661 | /* Convert the address to host format. Assume that the address is | |
662 | unsigned. */ | |
663 | l_name = extract_unsigned_integer (buf, 4); | |
664 | ||
665 | if (l_name == 0) | |
666 | return 0; /* No filename. */ | |
667 | ||
668 | /* Now fetch the filename from target memory. */ | |
669 | target_read_string (l_name, &filename, SO_NAME_MAX_PATH_SIZE - 1, &errcode); | |
670 | ||
671 | if (errcode) | |
672 | { | |
8a3fe4f8 | 673 | warning (_("failed to read exec filename from attached file: %s"), |
419b8bfb RC |
674 | safe_strerror (errcode)); |
675 | return 0; | |
676 | } | |
677 | ||
678 | make_cleanup (xfree, filename); | |
679 | /* Have a pathname: read the symbol file. */ | |
680 | symbol_file_add_main (filename, from_tty); | |
681 | ||
682 | return 1; | |
683 | } | |
684 | ||
685 | static void | |
686 | som_free_so (struct so_list *so) | |
687 | { | |
688 | xfree (so->lm_info); | |
689 | } | |
690 | ||
691 | static CORE_ADDR | |
692 | som_solib_thread_start_addr (struct so_list *so) | |
693 | { | |
694 | return so->lm_info->tsd_start_addr; | |
695 | } | |
696 | ||
697 | /* Return the GOT value for the shared library in which ADDR belongs. If | |
698 | ADDR isn't in any known shared library, return zero. */ | |
699 | ||
700 | static CORE_ADDR | |
701 | som_solib_get_got_by_pc (CORE_ADDR addr) | |
702 | { | |
703 | struct so_list *so_list = master_so_list (); | |
704 | CORE_ADDR got_value = 0; | |
705 | ||
706 | while (so_list) | |
707 | { | |
708 | if (so_list->lm_info->text_addr <= addr | |
709 | && so_list->lm_info->text_end > addr) | |
710 | { | |
711 | got_value = so_list->lm_info->got_value; | |
712 | break; | |
713 | } | |
714 | so_list = so_list->next; | |
715 | } | |
716 | return got_value; | |
717 | } | |
718 | ||
719 | /* Return the address of the handle of the shared library in which ADDR belongs. | |
720 | If ADDR isn't in any known shared library, return zero. */ | |
721 | /* this function is used in initialize_hp_cxx_exception_support in | |
722 | hppa-hpux-tdep.c */ | |
723 | ||
724 | static CORE_ADDR | |
725 | som_solib_get_solib_by_pc (CORE_ADDR addr) | |
726 | { | |
727 | struct so_list *so_list = master_so_list (); | |
728 | ||
729 | while (so_list) | |
730 | { | |
731 | if (so_list->lm_info->text_addr <= addr | |
732 | && so_list->lm_info->text_end > addr) | |
733 | { | |
734 | break; | |
735 | } | |
736 | so_list = so_list->next; | |
737 | } | |
738 | if (so_list) | |
739 | return so_list->lm_info->lm_addr; | |
740 | else | |
741 | return 0; | |
742 | } | |
743 | ||
744 | ||
745 | static struct target_so_ops som_so_ops; | |
746 | ||
747 | extern initialize_file_ftype _initialize_som_solib; /* -Wmissing-prototypes */ | |
748 | ||
749 | void | |
750 | _initialize_som_solib (void) | |
751 | { | |
752 | som_so_ops.relocate_section_addresses = som_relocate_section_addresses; | |
753 | som_so_ops.free_so = som_free_so; | |
754 | som_so_ops.clear_solib = som_clear_solib; | |
755 | som_so_ops.solib_create_inferior_hook = som_solib_create_inferior_hook; | |
756 | som_so_ops.special_symbol_handling = som_special_symbol_handling; | |
757 | som_so_ops.current_sos = som_current_sos; | |
758 | som_so_ops.open_symbol_file_object = som_open_symbol_file_object; | |
759 | som_so_ops.in_dynsym_resolve_code = som_in_dynsym_resolve_code; | |
760 | } | |
761 | ||
d542061a | 762 | void som_solib_select (struct gdbarch *gdbarch) |
419b8bfb | 763 | { |
d542061a UW |
764 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
765 | set_solib_ops (gdbarch, &som_so_ops); | |
419b8bfb RC |
766 | |
767 | tdep->solib_thread_start_addr = som_solib_thread_start_addr; | |
768 | tdep->solib_get_got_by_pc = som_solib_get_got_by_pc; | |
769 | tdep->solib_get_solib_by_pc = som_solib_get_solib_by_pc; | |
770 | } | |
771 | ||
772 | /* The rest of these functions are not part of the solib interface; they | |
773 | are used by somread.c or hppa-hpux-tdep.c */ | |
774 | ||
775 | int | |
776 | som_solib_section_offsets (struct objfile *objfile, | |
777 | struct section_offsets *offsets) | |
778 | { | |
779 | struct so_list *so_list = master_so_list (); | |
780 | ||
781 | while (so_list) | |
782 | { | |
783 | /* Oh what a pain! We need the offsets before so_list->objfile | |
784 | is valid. The BFDs will never match. Make a best guess. */ | |
785 | if (strstr (objfile->name, so_list->so_name)) | |
786 | { | |
787 | asection *private_section; | |
788 | ||
789 | /* The text offset is easy. */ | |
790 | offsets->offsets[SECT_OFF_TEXT (objfile)] | |
791 | = (so_list->lm_info->text_addr | |
792 | - so_list->lm_info->text_link_addr); | |
793 | offsets->offsets[SECT_OFF_RODATA (objfile)] | |
794 | = ANOFFSET (offsets, SECT_OFF_TEXT (objfile)); | |
795 | ||
796 | /* We should look at presumed_dp in the SOM header, but | |
797 | that's not easily available. This should be OK though. */ | |
798 | private_section = bfd_get_section_by_name (objfile->obfd, | |
799 | "$PRIVATE$"); | |
800 | if (!private_section) | |
801 | { | |
8a3fe4f8 | 802 | warning (_("Unable to find $PRIVATE$ in shared library!")); |
419b8bfb RC |
803 | offsets->offsets[SECT_OFF_DATA (objfile)] = 0; |
804 | offsets->offsets[SECT_OFF_BSS (objfile)] = 0; | |
805 | return 1; | |
806 | } | |
807 | offsets->offsets[SECT_OFF_DATA (objfile)] | |
808 | = (so_list->lm_info->data_start - private_section->vma); | |
809 | offsets->offsets[SECT_OFF_BSS (objfile)] | |
810 | = ANOFFSET (offsets, SECT_OFF_DATA (objfile)); | |
811 | return 1; | |
812 | } | |
813 | so_list = so_list->next; | |
814 | } | |
815 | return 0; | |
816 | } |