1 /* Native support for the SGI Iris running IRIX version 5, for GDB.
2 Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
3 Free Software Foundation, Inc.
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.
9 This file is part of GDB.
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.
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.
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
23 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
30 #include "gdb_string.h"
32 #include <sys/procfs.h>
33 #include <setjmp.h> /* For JB_XXX. */
35 /* Size of elements in jmpbuf */
37 #define JB_ELEMENT_SIZE 4
40 * See the comment in m68k-tdep.c regarding the utility of these functions.
42 * These definitions are from the MIPS SVR4 ABI, so they may work for
43 * any MIPS SVR4 target.
47 supply_gregset (gregsetp
)
51 register greg_t
*regp
= &(*gregsetp
)[0];
52 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
54 for(regi
= 0; regi
<= CTX_RA
; regi
++)
55 supply_register (regi
, (char *)(regp
+ regi
));
57 supply_register (PC_REGNUM
, (char *)(regp
+ CTX_EPC
));
58 supply_register (HI_REGNUM
, (char *)(regp
+ CTX_MDHI
));
59 supply_register (LO_REGNUM
, (char *)(regp
+ CTX_MDLO
));
60 supply_register (CAUSE_REGNUM
, (char *)(regp
+ CTX_CAUSE
));
62 /* Fill inaccessible registers with zero. */
63 supply_register (BADVADDR_REGNUM
, zerobuf
);
67 fill_gregset (gregsetp
, regno
)
72 register greg_t
*regp
= &(*gregsetp
)[0];
74 for (regi
= 0; regi
<= CTX_RA
; regi
++)
75 if ((regno
== -1) || (regno
== regi
))
76 *(regp
+ regi
) = *(greg_t
*) ®isters
[REGISTER_BYTE (regi
)];
78 if ((regno
== -1) || (regno
== PC_REGNUM
))
79 *(regp
+ CTX_EPC
) = *(greg_t
*) ®isters
[REGISTER_BYTE (PC_REGNUM
)];
81 if ((regno
== -1) || (regno
== CAUSE_REGNUM
))
82 *(regp
+ CTX_CAUSE
) = *(greg_t
*) ®isters
[REGISTER_BYTE (CAUSE_REGNUM
)];
84 if ((regno
== -1) || (regno
== HI_REGNUM
))
85 *(regp
+ CTX_MDHI
) = *(greg_t
*) ®isters
[REGISTER_BYTE (HI_REGNUM
)];
87 if ((regno
== -1) || (regno
== LO_REGNUM
))
88 *(regp
+ CTX_MDLO
) = *(greg_t
*) ®isters
[REGISTER_BYTE (LO_REGNUM
)];
92 * Now we do the same thing for floating-point registers.
93 * We don't bother to condition on FP0_REGNUM since any
94 * reasonable MIPS configuration has an R3010 in it.
96 * Again, see the comments in m68k-tdep.c.
100 supply_fpregset (fpregsetp
)
101 fpregset_t
*fpregsetp
;
104 static char zerobuf
[MAX_REGISTER_RAW_SIZE
] = {0};
106 for (regi
= 0; regi
< 32; regi
++)
107 supply_register (FP0_REGNUM
+ regi
,
108 (char *)&fpregsetp
->fp_r
.fp_regs
[regi
]);
110 supply_register (FCRCS_REGNUM
, (char *)&fpregsetp
->fp_csr
);
112 /* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
113 supply_register (FCRIR_REGNUM
, zerobuf
);
117 fill_fpregset (fpregsetp
, regno
)
118 fpregset_t
*fpregsetp
;
124 for (regi
= FP0_REGNUM
; regi
< FP0_REGNUM
+ 32; regi
++)
126 if ((regno
== -1) || (regno
== regi
))
128 from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
129 to
= (char *) &(fpregsetp
->fp_r
.fp_regs
[regi
- FP0_REGNUM
]);
130 memcpy(to
, from
, REGISTER_RAW_SIZE (regi
));
134 if ((regno
== -1) || (regno
== FCRCS_REGNUM
))
135 fpregsetp
->fp_csr
= *(unsigned *) ®isters
[REGISTER_BYTE(FCRCS_REGNUM
)];
139 /* Figure out where the longjmp will land.
140 We expect the first arg to be a pointer to the jmp_buf structure from which
141 we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
142 This routine returns true on success. */
145 get_longjmp_target (pc
)
148 char buf
[TARGET_PTR_BIT
/ TARGET_CHAR_BIT
];
151 jb_addr
= read_register (A0_REGNUM
);
153 if (target_read_memory (jb_addr
+ JB_PC
* JB_ELEMENT_SIZE
, buf
,
154 TARGET_PTR_BIT
/ TARGET_CHAR_BIT
))
157 *pc
= extract_address (buf
, TARGET_PTR_BIT
/ TARGET_CHAR_BIT
);
163 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
165 unsigned core_reg_size
;
166 int which
; /* Unused */
167 unsigned int reg_addr
; /* Unused */
169 if (core_reg_size
!= REGISTER_BYTES
)
171 warning ("wrong size gregset struct in core file");
175 memcpy ((char *)registers
, core_reg_sect
, core_reg_size
);
178 /* Irix 5 uses what appears to be a unique form of shared library
179 support. This is a copy of solib.c modified for Irix 5. */
181 #include <sys/types.h>
183 #include <sys/param.h>
186 /* <obj.h> includes <sym.h> and <symconst.h>, which causes conflicts
187 with our versions of those files included by tm-mips.h. Prevent
188 <obj.h> from including them with some appropriate defines. */
190 #define __SYMCONST_H__
196 #include "objfiles.h"
199 #include "gnu-regex.h"
200 #include "inferior.h"
201 #include "language.h"
204 /* The symbol which starts off the list of shared libraries. */
205 #define DEBUG_BASE "__rld_obj_head"
207 /* How to get the loaded address of a shared library. */
208 #define LM_ADDR(so) ((so)->lm.o_praw)
210 char shadow_contents
[BREAKPOINT_MAX
]; /* Stash old bkpt addr contents */
213 struct so_list
*next
; /* next structure in linked list */
215 struct obj lm
; /* copy of link map from inferior */
216 struct obj_list
*lladdr
; /* addr in inferior lm was read from */
217 CORE_ADDR lmend
; /* upper addr bound of mapped object */
218 char symbols_loaded
; /* flag: symbols read in yet? */
219 char from_tty
; /* flag: print msgs? */
220 struct objfile
*objfile
; /* objfile for loaded lib */
221 struct section_table
*sections
;
222 struct section_table
*sections_end
;
223 struct section_table
*textsection
;
227 static struct so_list
*so_list_head
; /* List of known shared objects */
228 static CORE_ADDR debug_base
; /* Base of dynamic linker structures */
229 static CORE_ADDR breakpoint_addr
; /* Address where end bkpt is set */
231 /* Local function prototypes */
234 sharedlibrary_command
PARAMS ((char *, int));
237 enable_break
PARAMS ((void));
240 disable_break
PARAMS ((void));
243 info_sharedlibrary_command
PARAMS ((char *, int));
246 symbol_add_stub
PARAMS ((char *));
248 static struct so_list
*
249 find_solib
PARAMS ((struct so_list
*));
251 static struct obj_list
*
252 first_link_map_member
PARAMS ((void));
255 locate_base
PARAMS ((void));
258 solib_map_sections
PARAMS ((struct so_list
*));
264 solib_map_sections -- open bfd and build sections for shared lib
268 static void solib_map_sections (struct so_list *so)
272 Given a pointer to one of the shared objects in our list
273 of mapped objects, use the recorded name to open a bfd
274 descriptor for the object, build a section table, and then
275 relocate all the section addresses by the base address at
276 which the shared object was mapped.
280 In most (all?) cases the shared object file name recorded in the
281 dynamic linkage tables will be a fully qualified pathname. For
282 cases where it isn't, do we really mimic the systems search
283 mechanism correctly in the below code (particularly the tilde
288 solib_map_sections (so
)
292 char *scratch_pathname
;
294 struct section_table
*p
;
295 struct cleanup
*old_chain
;
299 filename
= tilde_expand (so
-> lm
.o_path
);
300 old_chain
= make_cleanup (free
, filename
);
302 scratch_chan
= openp (getenv ("PATH"), 1, filename
, O_RDONLY
, 0,
304 if (scratch_chan
< 0)
306 scratch_chan
= openp (getenv ("LD_LIBRARY_PATH"), 1, filename
,
307 O_RDONLY
, 0, &scratch_pathname
);
309 if (scratch_chan
< 0)
311 perror_with_name (filename
);
313 /* Leave scratch_pathname allocated. abfd->name will point to it. */
315 abfd
= bfd_fdopenr (scratch_pathname
, gnutarget
, scratch_chan
);
318 close (scratch_chan
);
319 error ("Could not open `%s' as an executable file: %s",
320 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
322 /* Leave bfd open, core_xfer_memory and "info files" need it. */
324 abfd
-> cacheable
= true;
326 if (!bfd_check_format (abfd
, bfd_object
))
328 error ("\"%s\": not in executable format: %s.",
329 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
331 if (build_section_table (abfd
, &so
-> sections
, &so
-> sections_end
))
333 error ("Can't find the file sections in `%s': %s",
334 bfd_get_filename (exec_bfd
), bfd_errmsg (bfd_get_error ()));
337 /* Irix 5 shared objects are pre-linked to particular addresses
338 although the dynamic linker may have to relocate them if the
339 address ranges of the libraries used by the main program clash.
340 The offset is the difference between the address where the object
341 is mapped and the binding address of the shared library. */
342 offset
= (CORE_ADDR
) LM_ADDR (so
) - so
-> lm
.o_base_address
;
344 for (p
= so
-> sections
; p
< so
-> sections_end
; p
++)
346 /* Relocate the section binding addresses as recorded in the shared
347 object's file by the offset to get the address to which the
348 object was actually mapped. */
350 p
-> endaddr
+= offset
;
351 so
-> lmend
= (CORE_ADDR
) max (p
-> endaddr
, so
-> lmend
);
352 if (STREQ (p
-> the_bfd_section
-> name
, ".text"))
354 so
-> textsection
= p
;
358 /* Free the file names, close the file now. */
359 do_cleanups (old_chain
);
366 locate_base -- locate the base address of dynamic linker structs
370 CORE_ADDR locate_base (void)
374 For both the SunOS and SVR4 shared library implementations, if the
375 inferior executable has been linked dynamically, there is a single
376 address somewhere in the inferior's data space which is the key to
377 locating all of the dynamic linker's runtime structures. This
378 address is the value of the symbol defined by the macro DEBUG_BASE.
379 The job of this function is to find and return that address, or to
380 return 0 if there is no such address (the executable is statically
383 For SunOS, the job is almost trivial, since the dynamic linker and
384 all of it's structures are statically linked to the executable at
385 link time. Thus the symbol for the address we are looking for has
386 already been added to the minimal symbol table for the executable's
387 objfile at the time the symbol file's symbols were read, and all we
388 have to do is look it up there. Note that we explicitly do NOT want
389 to find the copies in the shared library.
391 The SVR4 version is much more complicated because the dynamic linker
392 and it's structures are located in the shared C library, which gets
393 run as the executable's "interpreter" by the kernel. We have to go
394 to a lot more work to discover the address of DEBUG_BASE. Because
395 of this complexity, we cache the value we find and return that value
396 on subsequent invocations. Note there is no copy in the executable
399 Irix 5 is basically like SunOS.
401 Note that we can assume nothing about the process state at the time
402 we need to find this address. We may be stopped on the first instruc-
403 tion of the interpreter (C shared library), the first instruction of
404 the executable itself, or somewhere else entirely (if we attached
405 to the process for example).
412 struct minimal_symbol
*msymbol
;
413 CORE_ADDR address
= 0;
415 msymbol
= lookup_minimal_symbol (DEBUG_BASE
, NULL
, symfile_objfile
);
416 if ((msymbol
!= NULL
) && (SYMBOL_VALUE_ADDRESS (msymbol
) != 0))
418 address
= SYMBOL_VALUE_ADDRESS (msymbol
);
427 first_link_map_member -- locate first member in dynamic linker's map
431 static struct link_map *first_link_map_member (void)
435 Read in a copy of the first member in the inferior's dynamic
436 link map from the inferior's dynamic linker structures, and return
437 a pointer to the copy in our address space.
440 static struct obj_list
*
441 first_link_map_member ()
446 read_memory (debug_base
, (char *) &lm
, sizeof (struct obj_list
*));
451 /* The first entry in the list is the object file we are debugging,
453 read_memory ((CORE_ADDR
) lm
, (char *) &s
, sizeof (struct obj_list
));
462 find_solib -- step through list of shared objects
466 struct so_list *find_solib (struct so_list *so_list_ptr)
470 This module contains the routine which finds the names of any
471 loaded "images" in the current process. The argument in must be
472 NULL on the first call, and then the returned value must be passed
473 in on subsequent calls. This provides the capability to "step" down
474 the list of loaded objects. On the last object, a NULL value is
478 static struct so_list
*
479 find_solib (so_list_ptr
)
480 struct so_list
*so_list_ptr
; /* Last lm or NULL for first one */
482 struct so_list
*so_list_next
= NULL
;
483 struct obj_list
*lm
= NULL
;
486 if (so_list_ptr
== NULL
)
488 /* We are setting up for a new scan through the loaded images. */
489 if ((so_list_next
= so_list_head
) == NULL
)
491 /* We have not already read in the dynamic linking structures
492 from the inferior, lookup the address of the base structure. */
493 debug_base
= locate_base ();
496 /* Read the base structure in and find the address of the first
497 link map list member. */
498 lm
= first_link_map_member ();
504 /* We have been called before, and are in the process of walking
505 the shared library list. Advance to the next shared object. */
506 if ((lm
= so_list_ptr
->ll
.next
) == NULL
)
508 /* We have hit the end of the list, so check to see if any were
509 added, but be quiet if we can't read from the target any more. */
510 int status
= target_read_memory ((CORE_ADDR
) so_list_ptr
-> lladdr
,
511 (char *) &(so_list_ptr
-> ll
),
512 sizeof (struct obj_list
));
515 lm
= so_list_ptr
->ll
.next
;
522 so_list_next
= so_list_ptr
-> next
;
524 if ((so_list_next
== NULL
) && (lm
!= NULL
))
529 /* Get next link map structure from inferior image and build a local
530 abbreviated load_map structure */
531 new = (struct so_list
*) xmalloc (sizeof (struct so_list
));
532 memset ((char *) new, 0, sizeof (struct so_list
));
534 /* Add the new node as the next node in the list, or as the root
535 node if this is the first one. */
536 if (so_list_ptr
!= NULL
)
538 so_list_ptr
-> next
= new;
545 read_memory ((CORE_ADDR
) lm
, (char *) &(new -> ll
),
546 sizeof (struct obj_list
));
547 read_memory ((CORE_ADDR
) new->ll
.data
, (char *) &(new -> lm
),
548 sizeof (struct obj
));
549 target_read_string ((CORE_ADDR
)new->lm
.o_path
, &buffer
,
552 memory_error (errcode
, (CORE_ADDR
)new->lm
.o_path
);
553 new->lm
.o_path
= buffer
;
554 solib_map_sections (new);
556 return (so_list_next
);
559 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
562 symbol_add_stub (arg
)
565 register struct so_list
*so
= (struct so_list
*) arg
; /* catch_errs bogon */
567 so
-> objfile
= symbol_file_add (so
-> lm
.o_path
, so
-> from_tty
,
568 (unsigned int) so
-> textsection
-> addr
,
577 solib_add -- add a shared library file to the symtab and section list
581 void solib_add (char *arg_string, int from_tty,
582 struct target_ops *target)
589 solib_add (arg_string
, from_tty
, target
)
592 struct target_ops
*target
;
594 register struct so_list
*so
= NULL
; /* link map state variable */
596 /* Last shared library that we read. */
597 struct so_list
*so_last
= NULL
;
603 if ((re_err
= re_comp (arg_string
? arg_string
: ".")) != NULL
)
605 error ("Invalid regexp: %s", re_err
);
608 /* Add the shared library sections to the section table of the
609 specified target, if any. */
612 /* Count how many new section_table entries there are. */
615 while ((so
= find_solib (so
)) != NULL
)
617 if (so
-> lm
.o_path
[0])
619 count
+= so
-> sections_end
- so
-> sections
;
627 /* We must update the to_sections field in the core_ops structure
628 here, otherwise we dereference a potential dangling pointer
629 for each call to target_read/write_memory within this routine. */
630 update_coreops
= core_ops
.to_sections
== target
->to_sections
;
632 /* Reallocate the target's section table including the new size. */
633 if (target
-> to_sections
)
635 old
= target
-> to_sections_end
- target
-> to_sections
;
636 target
-> to_sections
= (struct section_table
*)
637 xrealloc ((char *)target
-> to_sections
,
638 (sizeof (struct section_table
)) * (count
+ old
));
643 target
-> to_sections
= (struct section_table
*)
644 xmalloc ((sizeof (struct section_table
)) * count
);
646 target
-> to_sections_end
= target
-> to_sections
+ (count
+ old
);
648 /* Update the to_sections field in the core_ops structure
652 core_ops
.to_sections
= target
->to_sections
;
653 core_ops
.to_sections_end
= target
->to_sections_end
;
656 /* Add these section table entries to the target's table. */
657 while ((so
= find_solib (so
)) != NULL
)
659 if (so
-> lm
.o_path
[0])
661 count
= so
-> sections_end
- so
-> sections
;
662 memcpy ((char *) (target
-> to_sections
+ old
),
664 (sizeof (struct section_table
)) * count
);
671 /* Now add the symbol files. */
672 while ((so
= find_solib (so
)) != NULL
)
674 if (so
-> lm
.o_path
[0] && re_exec (so
-> lm
.o_path
))
676 so
-> from_tty
= from_tty
;
677 if (so
-> symbols_loaded
)
681 printf_unfiltered ("Symbols already loaded for %s\n", so
-> lm
.o_path
);
684 else if (catch_errors
685 (symbol_add_stub
, (char *) so
,
686 "Error while reading shared library symbols:\n",
690 so
-> symbols_loaded
= 1;
695 /* Getting new symbols may change our opinion about what is
698 reinit_frame_cache ();
705 info_sharedlibrary_command -- code for "info sharedlibrary"
709 static void info_sharedlibrary_command ()
713 Walk through the shared library list and print information
714 about each attached library.
718 info_sharedlibrary_command (ignore
, from_tty
)
722 register struct so_list
*so
= NULL
; /* link map state variable */
725 if (exec_bfd
== NULL
)
727 printf_unfiltered ("No exec file.\n");
730 while ((so
= find_solib (so
)) != NULL
)
732 if (so
-> lm
.o_path
[0])
736 printf_unfiltered("%-12s%-12s%-12s%s\n", "From", "To", "Syms Read",
737 "Shared Object Library");
740 printf_unfiltered ("%-12s",
741 local_hex_string_custom ((unsigned long) LM_ADDR (so
),
743 printf_unfiltered ("%-12s",
744 local_hex_string_custom ((unsigned long) so
-> lmend
,
746 printf_unfiltered ("%-12s", so
-> symbols_loaded
? "Yes" : "No");
747 printf_unfiltered ("%s\n", so
-> lm
.o_path
);
750 if (so_list_head
== NULL
)
752 printf_unfiltered ("No shared libraries loaded at this time.\n");
760 solib_address -- check to see if an address is in a shared lib
764 char *solib_address (CORE_ADDR address)
768 Provides a hook for other gdb routines to discover whether or
769 not a particular address is within the mapped address space of
770 a shared library. Any address between the base mapping address
771 and the first address beyond the end of the last mapping, is
772 considered to be within the shared library address space, for
775 For example, this routine is called at one point to disable
776 breakpoints which are in shared libraries that are not currently
781 solib_address (address
)
784 register struct so_list
*so
= 0; /* link map state variable */
786 while ((so
= find_solib (so
)) != NULL
)
788 if (so
-> lm
.o_path
[0])
790 if ((address
>= (CORE_ADDR
) LM_ADDR (so
)) &&
791 (address
< (CORE_ADDR
) so
-> lmend
))
792 return (so
->lm
.o_path
);
798 /* Called by free_all_symtabs */
803 struct so_list
*next
;
808 if (so_list_head
-> sections
)
810 free ((PTR
)so_list_head
-> sections
);
812 if (so_list_head
-> abfd
)
814 bfd_filename
= bfd_get_filename (so_list_head
-> abfd
);
815 if (!bfd_close (so_list_head
-> abfd
))
816 warning ("cannot close \"%s\": %s",
817 bfd_filename
, bfd_errmsg (bfd_get_error ()));
820 /* This happens for the executable on SVR4. */
823 next
= so_list_head
-> next
;
825 free ((PTR
)bfd_filename
);
826 free (so_list_head
->lm
.o_path
);
827 free ((PTR
)so_list_head
);
837 disable_break -- remove the "mapping changed" breakpoint
841 static int disable_break ()
845 Removes the breakpoint that gets hit when the dynamic linker
846 completes a mapping change.
856 /* Note that breakpoint address and original contents are in our address
857 space, so we just need to write the original contents back. */
859 if (memory_remove_breakpoint (breakpoint_addr
, shadow_contents
) != 0)
864 /* For the SVR4 version, we always know the breakpoint address. For the
865 SunOS version we don't know it until the above code is executed.
866 Grumble if we are stopped anywhere besides the breakpoint address. */
868 if (stop_pc
!= breakpoint_addr
)
870 warning ("stopped at unknown breakpoint while handling shared libraries");
880 enable_break -- arrange for dynamic linker to hit breakpoint
884 int enable_break (void)
888 This functions inserts a breakpoint at the entry point of the
889 main executable, where all shared libraries are mapped in.
895 if (symfile_objfile
!= NULL
896 && target_insert_breakpoint (symfile_objfile
->ei
.entry_point
,
897 shadow_contents
) == 0)
899 breakpoint_addr
= symfile_objfile
->ei
.entry_point
;
910 solib_create_inferior_hook -- shared library startup support
914 void solib_create_inferior_hook()
918 When gdb starts up the inferior, it nurses it along (through the
919 shell) until it is ready to execute it's first instruction. At this
920 point, this function gets called via expansion of the macro
921 SOLIB_CREATE_INFERIOR_HOOK.
923 For SunOS executables, this first instruction is typically the
924 one at "_start", or a similar text label, regardless of whether
925 the executable is statically or dynamically linked. The runtime
926 startup code takes care of dynamically linking in any shared
927 libraries, once gdb allows the inferior to continue.
929 For SVR4 executables, this first instruction is either the first
930 instruction in the dynamic linker (for dynamically linked
931 executables) or the instruction at "start" for statically linked
932 executables. For dynamically linked executables, the system
933 first exec's /lib/libc.so.N, which contains the dynamic linker,
934 and starts it running. The dynamic linker maps in any needed
935 shared libraries, maps in the actual user executable, and then
936 jumps to "start" in the user executable.
938 For both SunOS shared libraries, and SVR4 shared libraries, we
939 can arrange to cooperate with the dynamic linker to discover the
940 names of shared libraries that are dynamically linked, and the
941 base addresses to which they are linked.
943 This function is responsible for discovering those names and
944 addresses, and saving sufficient information about them to allow
945 their symbols to be read at a later time.
949 Between enable_break() and disable_break(), this code does not
950 properly handle hitting breakpoints which the user might have
951 set in the startup code or in the dynamic linker itself. Proper
952 handling will probably have to wait until the implementation is
953 changed to use the "breakpoint handler function" method.
955 Also, what if child has exit()ed? Must exit loop somehow.
959 solib_create_inferior_hook()
961 if (!enable_break ())
963 warning ("shared library handler failed to enable breakpoint");
967 /* Now run the target. It will eventually hit the breakpoint, at
968 which point all of the libraries will have been mapped in and we
969 can go groveling around in the dynamic linker structures to find
970 out what we need to know about them. */
972 clear_proceed_status ();
973 stop_soon_quietly
= 1;
977 target_resume (-1, 0, stop_signal
);
978 wait_for_inferior ();
980 while (stop_signal
!= SIGTRAP
);
982 /* We are now either at the "mapping complete" breakpoint (or somewhere
983 else, a condition we aren't prepared to deal with anyway), so adjust
984 the PC as necessary after a breakpoint, disable the breakpoint, and
985 add any shared libraries that were mapped in. */
987 if (DECR_PC_AFTER_BREAK
)
989 stop_pc
-= DECR_PC_AFTER_BREAK
;
990 write_register (PC_REGNUM
, stop_pc
);
993 if (!disable_break ())
995 warning ("shared library handler failed to disable breakpoint");
998 /* solib_add will call reinit_frame_cache.
999 But we are stopped in the startup code and we might not have symbols
1000 for the startup code, so heuristic_proc_start could be called
1001 and will put out an annoying warning.
1002 Delaying the resetting of stop_soon_quietly until after symbol loading
1003 suppresses the warning. */
1004 if (auto_solib_add_at_startup
)
1005 solib_add ((char *) 0, 0, (struct target_ops
*) 0);
1006 stop_soon_quietly
= 0;
1013 sharedlibrary_command -- handle command to explicitly add library
1017 static void sharedlibrary_command (char *args, int from_tty)
1024 sharedlibrary_command (args
, from_tty
)
1029 solib_add (args
, from_tty
, (struct target_ops
*) 0);
1035 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
1036 "Load shared object library symbols for files matching REGEXP.");
1037 add_info ("sharedlibrary", info_sharedlibrary_command
,
1038 "Status of loaded shared object libraries.");
1041 (add_set_cmd ("auto-solib-add", class_support
, var_zinteger
,
1042 (char *) &auto_solib_add_at_startup
,
1043 "Set autoloading of shared library symbols at startup.\n\
1044 If nonzero, symbols from all shared object libraries will be loaded\n\
1045 automatically when the inferior begins execution. Otherwise, symbols\n\
1046 must be loaded manually, using `sharedlibrary'.",
1052 /* Register that we are able to handle irix5 core file formats.
1053 This really is bfd_target_unknown_flavour */
1055 static struct core_fns irix5_core_fns
=
1057 bfd_target_unknown_flavour
,
1058 fetch_core_registers
,
1063 _initialize_core_irix5 ()
1065 add_core_fns (&irix5_core_fns
);