Commit | Line | Data |
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a2f1e2e5 | 1 | /* Native support for the SGI Iris running IRIX version 5, for GDB. |
87273c71 | 2 | Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 |
33c66e44 | 3 | Free Software Foundation, Inc. |
a2f1e2e5 ILT |
4 | Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU |
5 | and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. | |
6 | Implemented for Irix 4.x by Garrett A. Wollman. | |
7 | Modified for Irix 5.x by Ian Lance Taylor. | |
8 | ||
9 | This file is part of GDB. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
6c9638b4 | 23 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
a2f1e2e5 ILT |
24 | |
25 | #include "defs.h" | |
26 | #include "inferior.h" | |
27 | #include "gdbcore.h" | |
28 | #include "target.h" | |
29 | ||
2b576293 | 30 | #include "gdb_string.h" |
a2f1e2e5 ILT |
31 | #include <sys/time.h> |
32 | #include <sys/procfs.h> | |
33 | #include <setjmp.h> /* For JB_XXX. */ | |
34 | ||
857dcde8 FF |
35 | static void |
36 | fetch_core_registers PARAMS ((char *, unsigned int, int, unsigned int)); | |
37 | ||
a2f1e2e5 ILT |
38 | /* Size of elements in jmpbuf */ |
39 | ||
40 | #define JB_ELEMENT_SIZE 4 | |
41 | ||
42 | /* | |
43 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
44 | * | |
45 | * These definitions are from the MIPS SVR4 ABI, so they may work for | |
46 | * any MIPS SVR4 target. | |
47 | */ | |
48 | ||
49 | void | |
50 | supply_gregset (gregsetp) | |
51 | gregset_t *gregsetp; | |
52 | { | |
53 | register int regi; | |
54 | register greg_t *regp = &(*gregsetp)[0]; | |
3f403f6a | 55 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
a2f1e2e5 ILT |
56 | |
57 | for(regi = 0; regi <= CTX_RA; regi++) | |
58 | supply_register (regi, (char *)(regp + regi)); | |
59 | ||
60 | supply_register (PC_REGNUM, (char *)(regp + CTX_EPC)); | |
61 | supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI)); | |
62 | supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO)); | |
63 | supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE)); | |
3f403f6a PS |
64 | |
65 | /* Fill inaccessible registers with zero. */ | |
66 | supply_register (BADVADDR_REGNUM, zerobuf); | |
a2f1e2e5 ILT |
67 | } |
68 | ||
69 | void | |
70 | fill_gregset (gregsetp, regno) | |
71 | gregset_t *gregsetp; | |
72 | int regno; | |
73 | { | |
74 | int regi; | |
75 | register greg_t *regp = &(*gregsetp)[0]; | |
76 | ||
77 | for (regi = 0; regi <= CTX_RA; regi++) | |
78 | if ((regno == -1) || (regno == regi)) | |
79 | *(regp + regi) = *(greg_t *) ®isters[REGISTER_BYTE (regi)]; | |
80 | ||
81 | if ((regno == -1) || (regno == PC_REGNUM)) | |
82 | *(regp + CTX_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)]; | |
83 | ||
84 | if ((regno == -1) || (regno == CAUSE_REGNUM)) | |
3f403f6a | 85 | *(regp + CTX_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (CAUSE_REGNUM)]; |
a2f1e2e5 ILT |
86 | |
87 | if ((regno == -1) || (regno == HI_REGNUM)) | |
88 | *(regp + CTX_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)]; | |
89 | ||
90 | if ((regno == -1) || (regno == LO_REGNUM)) | |
91 | *(regp + CTX_MDLO) = *(greg_t *) ®isters[REGISTER_BYTE (LO_REGNUM)]; | |
92 | } | |
93 | ||
94 | /* | |
95 | * Now we do the same thing for floating-point registers. | |
96 | * We don't bother to condition on FP0_REGNUM since any | |
97 | * reasonable MIPS configuration has an R3010 in it. | |
98 | * | |
99 | * Again, see the comments in m68k-tdep.c. | |
100 | */ | |
101 | ||
102 | void | |
103 | supply_fpregset (fpregsetp) | |
104 | fpregset_t *fpregsetp; | |
105 | { | |
106 | register int regi; | |
3f403f6a | 107 | static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0}; |
a2f1e2e5 ILT |
108 | |
109 | for (regi = 0; regi < 32; regi++) | |
110 | supply_register (FP0_REGNUM + regi, | |
111 | (char *)&fpregsetp->fp_r.fp_regs[regi]); | |
112 | ||
113 | supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr); | |
114 | ||
115 | /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */ | |
3f403f6a | 116 | supply_register (FCRIR_REGNUM, zerobuf); |
a2f1e2e5 ILT |
117 | } |
118 | ||
119 | void | |
120 | fill_fpregset (fpregsetp, regno) | |
121 | fpregset_t *fpregsetp; | |
122 | int regno; | |
123 | { | |
124 | int regi; | |
125 | char *from, *to; | |
126 | ||
127 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
128 | { | |
129 | if ((regno == -1) || (regno == regi)) | |
130 | { | |
131 | from = (char *) ®isters[REGISTER_BYTE (regi)]; | |
132 | to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); | |
133 | memcpy(to, from, REGISTER_RAW_SIZE (regi)); | |
134 | } | |
135 | } | |
136 | ||
137 | if ((regno == -1) || (regno == FCRCS_REGNUM)) | |
138 | fpregsetp->fp_csr = *(unsigned *) ®isters[REGISTER_BYTE(FCRCS_REGNUM)]; | |
139 | } | |
140 | ||
141 | ||
142 | /* Figure out where the longjmp will land. | |
143 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
144 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. | |
145 | This routine returns true on success. */ | |
146 | ||
147 | int | |
148 | get_longjmp_target (pc) | |
149 | CORE_ADDR *pc; | |
150 | { | |
151 | char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT]; | |
152 | CORE_ADDR jb_addr; | |
153 | ||
154 | jb_addr = read_register (A0_REGNUM); | |
155 | ||
156 | if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, | |
157 | TARGET_PTR_BIT / TARGET_CHAR_BIT)) | |
158 | return 0; | |
159 | ||
160 | *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); | |
161 | ||
162 | return 1; | |
163 | } | |
164 | ||
a1df8e78 | 165 | static void |
a2f1e2e5 ILT |
166 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) |
167 | char *core_reg_sect; | |
168 | unsigned core_reg_size; | |
169 | int which; /* Unused */ | |
170 | unsigned int reg_addr; /* Unused */ | |
171 | { | |
172 | if (core_reg_size != REGISTER_BYTES) | |
173 | { | |
174 | warning ("wrong size gregset struct in core file"); | |
175 | return; | |
176 | } | |
177 | ||
178 | memcpy ((char *)registers, core_reg_sect, core_reg_size); | |
179 | } | |
180 | \f | |
181 | /* Irix 5 uses what appears to be a unique form of shared library | |
182 | support. This is a copy of solib.c modified for Irix 5. */ | |
183 | ||
184 | #include <sys/types.h> | |
185 | #include <signal.h> | |
a2f1e2e5 ILT |
186 | #include <sys/param.h> |
187 | #include <fcntl.h> | |
188 | ||
189 | /* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts | |
190 | with our versions of those files included by tm-mips.h. Prevent | |
191 | <obj.h> from including them with some appropriate defines. */ | |
192 | #define __SYM_H__ | |
193 | #define __SYMCONST_H__ | |
194 | #include <obj.h> | |
195 | ||
196 | #include "symtab.h" | |
197 | #include "bfd.h" | |
198 | #include "symfile.h" | |
199 | #include "objfiles.h" | |
200 | #include "command.h" | |
201 | #include "frame.h" | |
811f1bdc | 202 | #include "gnu-regex.h" |
a2f1e2e5 ILT |
203 | #include "inferior.h" |
204 | #include "language.h" | |
2e11fdd8 | 205 | #include "gdbcmd.h" |
a2f1e2e5 | 206 | |
a2f1e2e5 ILT |
207 | /* The symbol which starts off the list of shared libraries. */ |
208 | #define DEBUG_BASE "__rld_obj_head" | |
209 | ||
210 | /* How to get the loaded address of a shared library. */ | |
33c66e44 | 211 | #define LM_ADDR(so) ((so)->lm.o_praw) |
a2f1e2e5 ILT |
212 | |
213 | char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */ | |
214 | ||
a2f1e2e5 ILT |
215 | struct so_list { |
216 | struct so_list *next; /* next structure in linked list */ | |
217 | struct obj_list ll; | |
218 | struct obj lm; /* copy of link map from inferior */ | |
219 | struct obj_list *lladdr; /* addr in inferior lm was read from */ | |
220 | CORE_ADDR lmend; /* upper addr bound of mapped object */ | |
221 | char symbols_loaded; /* flag: symbols read in yet? */ | |
222 | char from_tty; /* flag: print msgs? */ | |
223 | struct objfile *objfile; /* objfile for loaded lib */ | |
224 | struct section_table *sections; | |
225 | struct section_table *sections_end; | |
226 | struct section_table *textsection; | |
227 | bfd *abfd; | |
228 | }; | |
229 | ||
230 | static struct so_list *so_list_head; /* List of known shared objects */ | |
231 | static CORE_ADDR debug_base; /* Base of dynamic linker structures */ | |
232 | static CORE_ADDR breakpoint_addr; /* Address where end bkpt is set */ | |
233 | ||
234 | /* Local function prototypes */ | |
235 | ||
236 | static void | |
237 | sharedlibrary_command PARAMS ((char *, int)); | |
238 | ||
239 | static int | |
240 | enable_break PARAMS ((void)); | |
241 | ||
242 | static int | |
243 | disable_break PARAMS ((void)); | |
244 | ||
245 | static void | |
246 | info_sharedlibrary_command PARAMS ((char *, int)); | |
247 | ||
248 | static int | |
249 | symbol_add_stub PARAMS ((char *)); | |
250 | ||
251 | static struct so_list * | |
252 | find_solib PARAMS ((struct so_list *)); | |
253 | ||
254 | static struct obj_list * | |
255 | first_link_map_member PARAMS ((void)); | |
256 | ||
257 | static CORE_ADDR | |
258 | locate_base PARAMS ((void)); | |
259 | ||
260 | static void | |
261 | solib_map_sections PARAMS ((struct so_list *)); | |
262 | ||
263 | /* | |
264 | ||
265 | LOCAL FUNCTION | |
266 | ||
267 | solib_map_sections -- open bfd and build sections for shared lib | |
268 | ||
269 | SYNOPSIS | |
270 | ||
271 | static void solib_map_sections (struct so_list *so) | |
272 | ||
273 | DESCRIPTION | |
274 | ||
275 | Given a pointer to one of the shared objects in our list | |
276 | of mapped objects, use the recorded name to open a bfd | |
277 | descriptor for the object, build a section table, and then | |
278 | relocate all the section addresses by the base address at | |
279 | which the shared object was mapped. | |
280 | ||
281 | FIXMES | |
282 | ||
283 | In most (all?) cases the shared object file name recorded in the | |
284 | dynamic linkage tables will be a fully qualified pathname. For | |
285 | cases where it isn't, do we really mimic the systems search | |
286 | mechanism correctly in the below code (particularly the tilde | |
287 | expansion stuff?). | |
288 | */ | |
289 | ||
290 | static void | |
291 | solib_map_sections (so) | |
292 | struct so_list *so; | |
293 | { | |
294 | char *filename; | |
295 | char *scratch_pathname; | |
296 | int scratch_chan; | |
297 | struct section_table *p; | |
298 | struct cleanup *old_chain; | |
299 | bfd *abfd; | |
33c66e44 | 300 | CORE_ADDR offset; |
a2f1e2e5 ILT |
301 | |
302 | filename = tilde_expand (so -> lm.o_path); | |
303 | old_chain = make_cleanup (free, filename); | |
304 | ||
305 | scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0, | |
306 | &scratch_pathname); | |
307 | if (scratch_chan < 0) | |
308 | { | |
309 | scratch_chan = openp (getenv ("LD_LIBRARY_PATH"), 1, filename, | |
310 | O_RDONLY, 0, &scratch_pathname); | |
311 | } | |
312 | if (scratch_chan < 0) | |
313 | { | |
314 | perror_with_name (filename); | |
315 | } | |
316 | /* Leave scratch_pathname allocated. abfd->name will point to it. */ | |
317 | ||
318 | abfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan); | |
319 | if (!abfd) | |
320 | { | |
321 | close (scratch_chan); | |
322 | error ("Could not open `%s' as an executable file: %s", | |
c4a081e1 | 323 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
a2f1e2e5 ILT |
324 | } |
325 | /* Leave bfd open, core_xfer_memory and "info files" need it. */ | |
326 | so -> abfd = abfd; | |
327 | abfd -> cacheable = true; | |
328 | ||
329 | if (!bfd_check_format (abfd, bfd_object)) | |
330 | { | |
331 | error ("\"%s\": not in executable format: %s.", | |
c4a081e1 | 332 | scratch_pathname, bfd_errmsg (bfd_get_error ())); |
a2f1e2e5 ILT |
333 | } |
334 | if (build_section_table (abfd, &so -> sections, &so -> sections_end)) | |
335 | { | |
336 | error ("Can't find the file sections in `%s': %s", | |
c4a081e1 | 337 | bfd_get_filename (exec_bfd), bfd_errmsg (bfd_get_error ())); |
a2f1e2e5 ILT |
338 | } |
339 | ||
33c66e44 PS |
340 | /* Irix 5 shared objects are pre-linked to particular addresses |
341 | although the dynamic linker may have to relocate them if the | |
342 | address ranges of the libraries used by the main program clash. | |
343 | The offset is the difference between the address where the object | |
344 | is mapped and the binding address of the shared library. */ | |
345 | offset = (CORE_ADDR) LM_ADDR (so) - so -> lm.o_base_address; | |
346 | ||
a2f1e2e5 ILT |
347 | for (p = so -> sections; p < so -> sections_end; p++) |
348 | { | |
349 | /* Relocate the section binding addresses as recorded in the shared | |
33c66e44 PS |
350 | object's file by the offset to get the address to which the |
351 | object was actually mapped. */ | |
352 | p -> addr += offset; | |
353 | p -> endaddr += offset; | |
a2f1e2e5 | 354 | so -> lmend = (CORE_ADDR) max (p -> endaddr, so -> lmend); |
94d4b713 | 355 | if (STREQ (p -> the_bfd_section -> name, ".text")) |
a2f1e2e5 ILT |
356 | { |
357 | so -> textsection = p; | |
358 | } | |
359 | } | |
360 | ||
361 | /* Free the file names, close the file now. */ | |
362 | do_cleanups (old_chain); | |
363 | } | |
364 | ||
365 | /* | |
366 | ||
367 | LOCAL FUNCTION | |
368 | ||
369 | locate_base -- locate the base address of dynamic linker structs | |
370 | ||
371 | SYNOPSIS | |
372 | ||
373 | CORE_ADDR locate_base (void) | |
374 | ||
375 | DESCRIPTION | |
376 | ||
377 | For both the SunOS and SVR4 shared library implementations, if the | |
378 | inferior executable has been linked dynamically, there is a single | |
379 | address somewhere in the inferior's data space which is the key to | |
380 | locating all of the dynamic linker's runtime structures. This | |
381 | address is the value of the symbol defined by the macro DEBUG_BASE. | |
382 | The job of this function is to find and return that address, or to | |
383 | return 0 if there is no such address (the executable is statically | |
384 | linked for example). | |
385 | ||
386 | For SunOS, the job is almost trivial, since the dynamic linker and | |
387 | all of it's structures are statically linked to the executable at | |
388 | link time. Thus the symbol for the address we are looking for has | |
389 | already been added to the minimal symbol table for the executable's | |
390 | objfile at the time the symbol file's symbols were read, and all we | |
391 | have to do is look it up there. Note that we explicitly do NOT want | |
392 | to find the copies in the shared library. | |
393 | ||
394 | The SVR4 version is much more complicated because the dynamic linker | |
395 | and it's structures are located in the shared C library, which gets | |
396 | run as the executable's "interpreter" by the kernel. We have to go | |
397 | to a lot more work to discover the address of DEBUG_BASE. Because | |
398 | of this complexity, we cache the value we find and return that value | |
399 | on subsequent invocations. Note there is no copy in the executable | |
400 | symbol tables. | |
401 | ||
402 | Irix 5 is basically like SunOS. | |
403 | ||
404 | Note that we can assume nothing about the process state at the time | |
405 | we need to find this address. We may be stopped on the first instruc- | |
406 | tion of the interpreter (C shared library), the first instruction of | |
407 | the executable itself, or somewhere else entirely (if we attached | |
408 | to the process for example). | |
409 | ||
410 | */ | |
411 | ||
412 | static CORE_ADDR | |
413 | locate_base () | |
414 | { | |
415 | struct minimal_symbol *msymbol; | |
416 | CORE_ADDR address = 0; | |
417 | ||
2d336b1b | 418 | msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile); |
a2f1e2e5 ILT |
419 | if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0)) |
420 | { | |
421 | address = SYMBOL_VALUE_ADDRESS (msymbol); | |
422 | } | |
423 | return (address); | |
424 | } | |
425 | ||
426 | /* | |
427 | ||
428 | LOCAL FUNCTION | |
429 | ||
430 | first_link_map_member -- locate first member in dynamic linker's map | |
431 | ||
432 | SYNOPSIS | |
433 | ||
434 | static struct link_map *first_link_map_member (void) | |
435 | ||
436 | DESCRIPTION | |
437 | ||
438 | Read in a copy of the first member in the inferior's dynamic | |
439 | link map from the inferior's dynamic linker structures, and return | |
440 | a pointer to the copy in our address space. | |
441 | */ | |
442 | ||
443 | static struct obj_list * | |
444 | first_link_map_member () | |
445 | { | |
446 | struct obj_list *lm; | |
447 | struct obj_list s; | |
448 | ||
449 | read_memory (debug_base, (char *) &lm, sizeof (struct obj_list *)); | |
450 | ||
451 | if (lm == NULL) | |
452 | return NULL; | |
453 | ||
454 | /* The first entry in the list is the object file we are debugging, | |
455 | so skip it. */ | |
456 | read_memory ((CORE_ADDR) lm, (char *) &s, sizeof (struct obj_list)); | |
457 | ||
458 | return s.next; | |
459 | } | |
460 | ||
461 | /* | |
462 | ||
463 | LOCAL FUNCTION | |
464 | ||
465 | find_solib -- step through list of shared objects | |
466 | ||
467 | SYNOPSIS | |
468 | ||
469 | struct so_list *find_solib (struct so_list *so_list_ptr) | |
470 | ||
471 | DESCRIPTION | |
472 | ||
473 | This module contains the routine which finds the names of any | |
474 | loaded "images" in the current process. The argument in must be | |
475 | NULL on the first call, and then the returned value must be passed | |
476 | in on subsequent calls. This provides the capability to "step" down | |
477 | the list of loaded objects. On the last object, a NULL value is | |
478 | returned. | |
479 | */ | |
480 | ||
481 | static struct so_list * | |
482 | find_solib (so_list_ptr) | |
483 | struct so_list *so_list_ptr; /* Last lm or NULL for first one */ | |
484 | { | |
485 | struct so_list *so_list_next = NULL; | |
486 | struct obj_list *lm = NULL; | |
487 | struct so_list *new; | |
488 | ||
489 | if (so_list_ptr == NULL) | |
490 | { | |
491 | /* We are setting up for a new scan through the loaded images. */ | |
492 | if ((so_list_next = so_list_head) == NULL) | |
493 | { | |
494 | /* We have not already read in the dynamic linking structures | |
495 | from the inferior, lookup the address of the base structure. */ | |
496 | debug_base = locate_base (); | |
497 | if (debug_base != 0) | |
498 | { | |
499 | /* Read the base structure in and find the address of the first | |
500 | link map list member. */ | |
501 | lm = first_link_map_member (); | |
502 | } | |
503 | } | |
504 | } | |
505 | else | |
506 | { | |
507 | /* We have been called before, and are in the process of walking | |
508 | the shared library list. Advance to the next shared object. */ | |
509 | if ((lm = so_list_ptr->ll.next) == NULL) | |
510 | { | |
511 | /* We have hit the end of the list, so check to see if any were | |
512 | added, but be quiet if we can't read from the target any more. */ | |
513 | int status = target_read_memory ((CORE_ADDR) so_list_ptr -> lladdr, | |
514 | (char *) &(so_list_ptr -> ll), | |
515 | sizeof (struct obj_list)); | |
516 | if (status == 0) | |
517 | { | |
518 | lm = so_list_ptr->ll.next; | |
519 | } | |
520 | else | |
521 | { | |
522 | lm = NULL; | |
523 | } | |
524 | } | |
525 | so_list_next = so_list_ptr -> next; | |
526 | } | |
527 | if ((so_list_next == NULL) && (lm != NULL)) | |
528 | { | |
4ad0021e JK |
529 | int errcode; |
530 | char *buffer; | |
531 | ||
a2f1e2e5 ILT |
532 | /* Get next link map structure from inferior image and build a local |
533 | abbreviated load_map structure */ | |
534 | new = (struct so_list *) xmalloc (sizeof (struct so_list)); | |
535 | memset ((char *) new, 0, sizeof (struct so_list)); | |
536 | new -> lladdr = lm; | |
537 | /* Add the new node as the next node in the list, or as the root | |
538 | node if this is the first one. */ | |
539 | if (so_list_ptr != NULL) | |
540 | { | |
541 | so_list_ptr -> next = new; | |
542 | } | |
543 | else | |
544 | { | |
545 | so_list_head = new; | |
546 | } | |
547 | so_list_next = new; | |
548 | read_memory ((CORE_ADDR) lm, (char *) &(new -> ll), | |
549 | sizeof (struct obj_list)); | |
550 | read_memory ((CORE_ADDR) new->ll.data, (char *) &(new -> lm), | |
551 | sizeof (struct obj)); | |
ce2f21b2 JK |
552 | target_read_string ((CORE_ADDR)new->lm.o_path, &buffer, |
553 | INT_MAX, &errcode); | |
4ad0021e | 554 | if (errcode != 0) |
ce2f21b2 | 555 | memory_error (errcode, (CORE_ADDR)new->lm.o_path); |
4ad0021e | 556 | new->lm.o_path = buffer; |
a2f1e2e5 ILT |
557 | solib_map_sections (new); |
558 | } | |
559 | return (so_list_next); | |
560 | } | |
561 | ||
562 | /* A small stub to get us past the arg-passing pinhole of catch_errors. */ | |
563 | ||
564 | static int | |
565 | symbol_add_stub (arg) | |
566 | char *arg; | |
567 | { | |
568 | register struct so_list *so = (struct so_list *) arg; /* catch_errs bogon */ | |
569 | ||
570 | so -> objfile = symbol_file_add (so -> lm.o_path, so -> from_tty, | |
571 | (unsigned int) so -> textsection -> addr, | |
572 | 0, 0, 0); | |
573 | return (1); | |
574 | } | |
575 | ||
576 | /* | |
577 | ||
578 | GLOBAL FUNCTION | |
579 | ||
580 | solib_add -- add a shared library file to the symtab and section list | |
581 | ||
582 | SYNOPSIS | |
583 | ||
584 | void solib_add (char *arg_string, int from_tty, | |
585 | struct target_ops *target) | |
586 | ||
587 | DESCRIPTION | |
588 | ||
589 | */ | |
590 | ||
591 | void | |
592 | solib_add (arg_string, from_tty, target) | |
593 | char *arg_string; | |
594 | int from_tty; | |
595 | struct target_ops *target; | |
596 | { | |
597 | register struct so_list *so = NULL; /* link map state variable */ | |
598 | ||
599 | /* Last shared library that we read. */ | |
600 | struct so_list *so_last = NULL; | |
601 | ||
602 | char *re_err; | |
603 | int count; | |
604 | int old; | |
605 | ||
606 | if ((re_err = re_comp (arg_string ? arg_string : ".")) != NULL) | |
607 | { | |
608 | error ("Invalid regexp: %s", re_err); | |
609 | } | |
610 | ||
0d98155c | 611 | /* Add the shared library sections to the section table of the |
46d185d3 | 612 | specified target, if any. */ |
a2f1e2e5 ILT |
613 | if (target) |
614 | { | |
615 | /* Count how many new section_table entries there are. */ | |
616 | so = NULL; | |
617 | count = 0; | |
618 | while ((so = find_solib (so)) != NULL) | |
619 | { | |
620 | if (so -> lm.o_path[0]) | |
621 | { | |
622 | count += so -> sections_end - so -> sections; | |
623 | } | |
624 | } | |
625 | ||
626 | if (count) | |
627 | { | |
148070cc JL |
628 | int update_coreops; |
629 | ||
630 | /* We must update the to_sections field in the core_ops structure | |
631 | here, otherwise we dereference a potential dangling pointer | |
632 | for each call to target_read/write_memory within this routine. */ | |
633 | update_coreops = core_ops.to_sections == target->to_sections; | |
634 | ||
a2f1e2e5 ILT |
635 | /* Reallocate the target's section table including the new size. */ |
636 | if (target -> to_sections) | |
637 | { | |
638 | old = target -> to_sections_end - target -> to_sections; | |
639 | target -> to_sections = (struct section_table *) | |
640 | xrealloc ((char *)target -> to_sections, | |
641 | (sizeof (struct section_table)) * (count + old)); | |
642 | } | |
643 | else | |
644 | { | |
645 | old = 0; | |
646 | target -> to_sections = (struct section_table *) | |
647 | xmalloc ((sizeof (struct section_table)) * count); | |
648 | } | |
649 | target -> to_sections_end = target -> to_sections + (count + old); | |
650 | ||
148070cc JL |
651 | /* Update the to_sections field in the core_ops structure |
652 | if needed. */ | |
653 | if (update_coreops) | |
654 | { | |
655 | core_ops.to_sections = target->to_sections; | |
656 | core_ops.to_sections_end = target->to_sections_end; | |
657 | } | |
658 | ||
a2f1e2e5 ILT |
659 | /* Add these section table entries to the target's table. */ |
660 | while ((so = find_solib (so)) != NULL) | |
661 | { | |
662 | if (so -> lm.o_path[0]) | |
663 | { | |
664 | count = so -> sections_end - so -> sections; | |
665 | memcpy ((char *) (target -> to_sections + old), | |
666 | so -> sections, | |
667 | (sizeof (struct section_table)) * count); | |
668 | old += count; | |
669 | } | |
670 | } | |
671 | } | |
672 | } | |
0d98155c PS |
673 | |
674 | /* Now add the symbol files. */ | |
675 | while ((so = find_solib (so)) != NULL) | |
676 | { | |
677 | if (so -> lm.o_path[0] && re_exec (so -> lm.o_path)) | |
678 | { | |
679 | so -> from_tty = from_tty; | |
680 | if (so -> symbols_loaded) | |
681 | { | |
682 | if (from_tty) | |
683 | { | |
684 | printf_unfiltered ("Symbols already loaded for %s\n", so -> lm.o_path); | |
685 | } | |
686 | } | |
687 | else if (catch_errors | |
688 | (symbol_add_stub, (char *) so, | |
689 | "Error while reading shared library symbols:\n", | |
690 | RETURN_MASK_ALL)) | |
691 | { | |
692 | so_last = so; | |
693 | so -> symbols_loaded = 1; | |
694 | } | |
695 | } | |
696 | } | |
46d185d3 PS |
697 | |
698 | /* Getting new symbols may change our opinion about what is | |
699 | frameless. */ | |
54d478cd | 700 | if (so_last) |
46d185d3 | 701 | reinit_frame_cache (); |
a2f1e2e5 ILT |
702 | } |
703 | ||
704 | /* | |
705 | ||
706 | LOCAL FUNCTION | |
707 | ||
708 | info_sharedlibrary_command -- code for "info sharedlibrary" | |
709 | ||
710 | SYNOPSIS | |
711 | ||
712 | static void info_sharedlibrary_command () | |
713 | ||
714 | DESCRIPTION | |
715 | ||
716 | Walk through the shared library list and print information | |
717 | about each attached library. | |
718 | */ | |
719 | ||
720 | static void | |
721 | info_sharedlibrary_command (ignore, from_tty) | |
722 | char *ignore; | |
723 | int from_tty; | |
724 | { | |
725 | register struct so_list *so = NULL; /* link map state variable */ | |
726 | int header_done = 0; | |
727 | ||
728 | if (exec_bfd == NULL) | |
729 | { | |
730 | printf_unfiltered ("No exec file.\n"); | |
731 | return; | |
732 | } | |
733 | while ((so = find_solib (so)) != NULL) | |
734 | { | |
735 | if (so -> lm.o_path[0]) | |
736 | { | |
737 | if (!header_done) | |
738 | { | |
739 | printf_unfiltered("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read", | |
740 | "Shared Object Library"); | |
741 | header_done++; | |
742 | } | |
743 | printf_unfiltered ("%-12s", | |
744 | local_hex_string_custom ((unsigned long) LM_ADDR (so), | |
745 | "08l")); | |
746 | printf_unfiltered ("%-12s", | |
747 | local_hex_string_custom ((unsigned long) so -> lmend, | |
748 | "08l")); | |
749 | printf_unfiltered ("%-12s", so -> symbols_loaded ? "Yes" : "No"); | |
750 | printf_unfiltered ("%s\n", so -> lm.o_path); | |
751 | } | |
752 | } | |
753 | if (so_list_head == NULL) | |
754 | { | |
755 | printf_unfiltered ("No shared libraries loaded at this time.\n"); | |
756 | } | |
757 | } | |
758 | ||
759 | /* | |
760 | ||
761 | GLOBAL FUNCTION | |
762 | ||
763 | solib_address -- check to see if an address is in a shared lib | |
764 | ||
765 | SYNOPSIS | |
766 | ||
f2ebb24d | 767 | char *solib_address (CORE_ADDR address) |
a2f1e2e5 ILT |
768 | |
769 | DESCRIPTION | |
770 | ||
771 | Provides a hook for other gdb routines to discover whether or | |
772 | not a particular address is within the mapped address space of | |
773 | a shared library. Any address between the base mapping address | |
774 | and the first address beyond the end of the last mapping, is | |
775 | considered to be within the shared library address space, for | |
776 | our purposes. | |
777 | ||
778 | For example, this routine is called at one point to disable | |
779 | breakpoints which are in shared libraries that are not currently | |
780 | mapped in. | |
781 | */ | |
782 | ||
f2ebb24d | 783 | char * |
a2f1e2e5 ILT |
784 | solib_address (address) |
785 | CORE_ADDR address; | |
786 | { | |
787 | register struct so_list *so = 0; /* link map state variable */ | |
788 | ||
789 | while ((so = find_solib (so)) != NULL) | |
790 | { | |
791 | if (so -> lm.o_path[0]) | |
792 | { | |
33c66e44 | 793 | if ((address >= (CORE_ADDR) LM_ADDR (so)) && |
a2f1e2e5 | 794 | (address < (CORE_ADDR) so -> lmend)) |
f2ebb24d | 795 | return (so->lm.o_path); |
a2f1e2e5 ILT |
796 | } |
797 | } | |
798 | return (0); | |
799 | } | |
800 | ||
801 | /* Called by free_all_symtabs */ | |
802 | ||
803 | void | |
804 | clear_solib() | |
805 | { | |
806 | struct so_list *next; | |
807 | char *bfd_filename; | |
808 | ||
809 | while (so_list_head) | |
810 | { | |
811 | if (so_list_head -> sections) | |
812 | { | |
813 | free ((PTR)so_list_head -> sections); | |
814 | } | |
815 | if (so_list_head -> abfd) | |
816 | { | |
817 | bfd_filename = bfd_get_filename (so_list_head -> abfd); | |
9de0904c JK |
818 | if (!bfd_close (so_list_head -> abfd)) |
819 | warning ("cannot close \"%s\": %s", | |
820 | bfd_filename, bfd_errmsg (bfd_get_error ())); | |
a2f1e2e5 ILT |
821 | } |
822 | else | |
823 | /* This happens for the executable on SVR4. */ | |
824 | bfd_filename = NULL; | |
4ad0021e | 825 | |
a2f1e2e5 ILT |
826 | next = so_list_head -> next; |
827 | if (bfd_filename) | |
828 | free ((PTR)bfd_filename); | |
4ad0021e | 829 | free (so_list_head->lm.o_path); |
a2f1e2e5 ILT |
830 | free ((PTR)so_list_head); |
831 | so_list_head = next; | |
832 | } | |
833 | debug_base = 0; | |
834 | } | |
835 | ||
836 | /* | |
837 | ||
838 | LOCAL FUNCTION | |
839 | ||
840 | disable_break -- remove the "mapping changed" breakpoint | |
841 | ||
842 | SYNOPSIS | |
843 | ||
844 | static int disable_break () | |
845 | ||
846 | DESCRIPTION | |
847 | ||
848 | Removes the breakpoint that gets hit when the dynamic linker | |
849 | completes a mapping change. | |
850 | ||
851 | */ | |
852 | ||
853 | static int | |
854 | disable_break () | |
855 | { | |
856 | int status = 1; | |
857 | ||
858 | ||
859 | /* Note that breakpoint address and original contents are in our address | |
860 | space, so we just need to write the original contents back. */ | |
861 | ||
862 | if (memory_remove_breakpoint (breakpoint_addr, shadow_contents) != 0) | |
863 | { | |
864 | status = 0; | |
865 | } | |
866 | ||
867 | /* For the SVR4 version, we always know the breakpoint address. For the | |
868 | SunOS version we don't know it until the above code is executed. | |
869 | Grumble if we are stopped anywhere besides the breakpoint address. */ | |
870 | ||
871 | if (stop_pc != breakpoint_addr) | |
872 | { | |
873 | warning ("stopped at unknown breakpoint while handling shared libraries"); | |
874 | } | |
875 | ||
876 | return (status); | |
877 | } | |
878 | ||
879 | /* | |
880 | ||
881 | LOCAL FUNCTION | |
882 | ||
883 | enable_break -- arrange for dynamic linker to hit breakpoint | |
884 | ||
885 | SYNOPSIS | |
886 | ||
887 | int enable_break (void) | |
888 | ||
889 | DESCRIPTION | |
890 | ||
76212295 PS |
891 | This functions inserts a breakpoint at the entry point of the |
892 | main executable, where all shared libraries are mapped in. | |
a2f1e2e5 ILT |
893 | */ |
894 | ||
895 | static int | |
896 | enable_break () | |
897 | { | |
76212295 PS |
898 | if (symfile_objfile != NULL |
899 | && target_insert_breakpoint (symfile_objfile->ei.entry_point, | |
900 | shadow_contents) == 0) | |
a2f1e2e5 | 901 | { |
76212295 PS |
902 | breakpoint_addr = symfile_objfile->ei.entry_point; |
903 | return 1; | |
a2f1e2e5 ILT |
904 | } |
905 | ||
76212295 | 906 | return 0; |
a2f1e2e5 ILT |
907 | } |
908 | ||
909 | /* | |
910 | ||
911 | GLOBAL FUNCTION | |
912 | ||
913 | solib_create_inferior_hook -- shared library startup support | |
914 | ||
915 | SYNOPSIS | |
916 | ||
917 | void solib_create_inferior_hook() | |
918 | ||
919 | DESCRIPTION | |
920 | ||
921 | When gdb starts up the inferior, it nurses it along (through the | |
922 | shell) until it is ready to execute it's first instruction. At this | |
923 | point, this function gets called via expansion of the macro | |
924 | SOLIB_CREATE_INFERIOR_HOOK. | |
925 | ||
926 | For SunOS executables, this first instruction is typically the | |
927 | one at "_start", or a similar text label, regardless of whether | |
928 | the executable is statically or dynamically linked. The runtime | |
929 | startup code takes care of dynamically linking in any shared | |
930 | libraries, once gdb allows the inferior to continue. | |
931 | ||
932 | For SVR4 executables, this first instruction is either the first | |
933 | instruction in the dynamic linker (for dynamically linked | |
934 | executables) or the instruction at "start" for statically linked | |
935 | executables. For dynamically linked executables, the system | |
936 | first exec's /lib/libc.so.N, which contains the dynamic linker, | |
937 | and starts it running. The dynamic linker maps in any needed | |
938 | shared libraries, maps in the actual user executable, and then | |
939 | jumps to "start" in the user executable. | |
940 | ||
941 | For both SunOS shared libraries, and SVR4 shared libraries, we | |
942 | can arrange to cooperate with the dynamic linker to discover the | |
943 | names of shared libraries that are dynamically linked, and the | |
944 | base addresses to which they are linked. | |
945 | ||
946 | This function is responsible for discovering those names and | |
947 | addresses, and saving sufficient information about them to allow | |
948 | their symbols to be read at a later time. | |
949 | ||
950 | FIXME | |
951 | ||
952 | Between enable_break() and disable_break(), this code does not | |
953 | properly handle hitting breakpoints which the user might have | |
954 | set in the startup code or in the dynamic linker itself. Proper | |
955 | handling will probably have to wait until the implementation is | |
956 | changed to use the "breakpoint handler function" method. | |
957 | ||
958 | Also, what if child has exit()ed? Must exit loop somehow. | |
959 | */ | |
960 | ||
961 | void | |
962 | solib_create_inferior_hook() | |
963 | { | |
964 | if (!enable_break ()) | |
965 | { | |
966 | warning ("shared library handler failed to enable breakpoint"); | |
967 | return; | |
968 | } | |
969 | ||
970 | /* Now run the target. It will eventually hit the breakpoint, at | |
971 | which point all of the libraries will have been mapped in and we | |
972 | can go groveling around in the dynamic linker structures to find | |
973 | out what we need to know about them. */ | |
974 | ||
975 | clear_proceed_status (); | |
976 | stop_soon_quietly = 1; | |
977 | stop_signal = 0; | |
978 | do | |
979 | { | |
980 | target_resume (-1, 0, stop_signal); | |
981 | wait_for_inferior (); | |
982 | } | |
983 | while (stop_signal != SIGTRAP); | |
a2f1e2e5 ILT |
984 | |
985 | /* We are now either at the "mapping complete" breakpoint (or somewhere | |
986 | else, a condition we aren't prepared to deal with anyway), so adjust | |
987 | the PC as necessary after a breakpoint, disable the breakpoint, and | |
988 | add any shared libraries that were mapped in. */ | |
989 | ||
990 | if (DECR_PC_AFTER_BREAK) | |
991 | { | |
992 | stop_pc -= DECR_PC_AFTER_BREAK; | |
993 | write_register (PC_REGNUM, stop_pc); | |
994 | } | |
995 | ||
996 | if (!disable_break ()) | |
997 | { | |
998 | warning ("shared library handler failed to disable breakpoint"); | |
999 | } | |
1000 | ||
76212295 PS |
1001 | /* solib_add will call reinit_frame_cache. |
1002 | But we are stopped in the startup code and we might not have symbols | |
1003 | for the startup code, so heuristic_proc_start could be called | |
1004 | and will put out an annoying warning. | |
1005 | Delaying the resetting of stop_soon_quietly until after symbol loading | |
1006 | suppresses the warning. */ | |
87273c71 | 1007 | if (auto_solib_add) |
2e11fdd8 | 1008 | solib_add ((char *) 0, 0, (struct target_ops *) 0); |
76212295 | 1009 | stop_soon_quietly = 0; |
a2f1e2e5 ILT |
1010 | } |
1011 | ||
1012 | /* | |
1013 | ||
1014 | LOCAL FUNCTION | |
1015 | ||
1016 | sharedlibrary_command -- handle command to explicitly add library | |
1017 | ||
1018 | SYNOPSIS | |
1019 | ||
1020 | static void sharedlibrary_command (char *args, int from_tty) | |
1021 | ||
1022 | DESCRIPTION | |
1023 | ||
1024 | */ | |
1025 | ||
1026 | static void | |
1027 | sharedlibrary_command (args, from_tty) | |
1028 | char *args; | |
1029 | int from_tty; | |
1030 | { | |
1031 | dont_repeat (); | |
1032 | solib_add (args, from_tty, (struct target_ops *) 0); | |
1033 | } | |
1034 | ||
1035 | void | |
1036 | _initialize_solib() | |
1037 | { | |
a2f1e2e5 ILT |
1038 | add_com ("sharedlibrary", class_files, sharedlibrary_command, |
1039 | "Load shared object library symbols for files matching REGEXP."); | |
1040 | add_info ("sharedlibrary", info_sharedlibrary_command, | |
1041 | "Status of loaded shared object libraries."); | |
2e11fdd8 PS |
1042 | |
1043 | add_show_from_set | |
1044 | (add_set_cmd ("auto-solib-add", class_support, var_zinteger, | |
87273c71 JL |
1045 | (char *) &auto_solib_add, |
1046 | "Set autoloading of shared library symbols.\n\ | |
2e11fdd8 | 1047 | If nonzero, symbols from all shared object libraries will be loaded\n\ |
87273c71 JL |
1048 | automatically when the inferior begins execution or when the dynamic linker\n\ |
1049 | informs gdb that a new library has been loaded. Otherwise, symbols\n\ | |
2e11fdd8 PS |
1050 | must be loaded manually, using `sharedlibrary'.", |
1051 | &setlist), | |
1052 | &showlist); | |
a2f1e2e5 | 1053 | } |
a1df8e78 FF |
1054 | |
1055 | \f | |
1056 | /* Register that we are able to handle irix5 core file formats. | |
1057 | This really is bfd_target_unknown_flavour */ | |
1058 | ||
1059 | static struct core_fns irix5_core_fns = | |
1060 | { | |
1061 | bfd_target_unknown_flavour, | |
1062 | fetch_core_registers, | |
1063 | NULL | |
1064 | }; | |
1065 | ||
1066 | void | |
1067 | _initialize_core_irix5 () | |
1068 | { | |
1069 | add_core_fns (&irix5_core_fns); | |
1070 | } |