1 /* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996, 1997,
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
27 #include "xcoffsolib.h"
30 #include "libbfd.h" /* For bfd_cache_lookup (FIXME) */
32 #include "gdb-stabs.h"
34 #include <sys/ptrace.h>
37 #include <sys/param.h>
41 #include <sys/ioctl.h>
49 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
50 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
52 #include <sys/systemcfg.h>
54 /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
55 debugging 32-bit and 64-bit processes. Define a typedef and macros for
56 accessing fields in the appropriate structures. */
58 /* In 32-bit compilation mode (which is the only mode from which ptrace()
59 works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
65 /* Return whether the current architecture is 64-bit. */
70 # define ARCH64() (REGISTER_RAW_SIZE (0) == 8)
73 /* Union of 32-bit and 64-bit ".reg" core file sections. */
77 struct __context64 r64
;
84 /* Union of 32-bit and 64-bit versions of ld_info. */
91 struct __ld_info32 l32
;
92 struct __ld_info64 l64
;
96 /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
97 declare and initialize a variable named VAR suitable for use as the arch64
98 parameter to the various LDI_*() macros. */
101 # define ARCH64_DECL(var)
103 # define ARCH64_DECL(var) int var = ARCH64 ()
106 /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
107 otherwise. This technique only works for FIELDs with the same data type in
108 32-bit and 64-bit versions of ld_info. */
111 # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
113 # define LDI_FIELD(ldi, arch64, field) \
114 (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
117 /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
118 process otherwise. */
120 #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
121 #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
122 #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
124 extern struct vmap
*map_vmap (bfd
* bf
, bfd
* arch
);
126 extern struct target_ops exec_ops
;
128 static void vmap_exec (void);
130 static void vmap_ldinfo (LdInfo
*);
132 static struct vmap
*add_vmap (LdInfo
*);
134 static int objfile_symbol_add (void *);
136 static void vmap_symtab (struct vmap
*);
138 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR
);
140 static void exec_one_dummy_insn (void);
143 fixup_breakpoints (CORE_ADDR low
, CORE_ADDR high
, CORE_ADDR delta
);
145 /* Conversion from gdb-to-system special purpose register numbers. */
147 static int special_regs
[] =
153 CTR
, /* CTR_REGNUM */
154 XER
, /* XER_REGNUM */
158 /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
161 ptrace32 (int req
, int id
, int *addr
, int data
, int *buf
)
163 int ret
= ptrace (req
, id
, (int *)addr
, data
, buf
);
165 printf ("ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
166 req
, id
, (unsigned int)addr
, data
, (unsigned int)buf
, ret
);
171 /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
174 ptrace64 (int req
, int id
, long long addr
, int data
, int *buf
)
177 int ret
= ptracex (req
, id
, addr
, data
, buf
);
182 printf ("ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
183 req
, id
, addr
, data
, (unsigned int)buf
, ret
);
188 /* Fetch register REGNO from the inferior. */
191 fetch_register (int regno
)
193 int *addr
= (int *) ®isters
[REGISTER_BYTE (regno
)];
196 /* Retrieved values may be -1, so infer errors from errno. */
199 /* Floating-point registers. */
200 if (regno
>= FP0_REGNUM
&& regno
<= FPLAST_REGNUM
)
202 nr
= regno
- FP0_REGNUM
+ FPR0
;
203 ptrace32 (PT_READ_FPR
, inferior_pid
, addr
, nr
, 0);
206 /* Bogus register number. */
207 else if (regno
> LAST_UISA_SP_REGNUM
)
208 fprintf_unfiltered (gdb_stderr
,
209 "gdb error: register no %d not implemented.\n",
212 /* Fixed-point registers. */
215 if (regno
>= FIRST_UISA_SP_REGNUM
)
216 nr
= special_regs
[regno
- FIRST_UISA_SP_REGNUM
];
221 *addr
= ptrace32 (PT_READ_GPR
, inferior_pid
, (int *)nr
, 0, 0);
224 /* PT_READ_GPR requires the buffer parameter to point to long long,
225 even if the register is really only 32 bits. */
227 ptrace64 (PT_READ_GPR
, inferior_pid
, nr
, 0, (int *)&buf
);
228 if (REGISTER_RAW_SIZE (regno
) == 8)
229 memcpy (addr
, &buf
, 8);
236 register_valid
[regno
] = 1;
240 /* FIXME: this happens 3 times at the start of each 64-bit program. */
241 perror ("ptrace read");
247 /* Store register REGNO back into the inferior. */
250 store_register (int regno
)
252 int *addr
= (int *) ®isters
[REGISTER_BYTE (regno
)];
255 /* -1 can be a successful return value, so infer errors from errno. */
258 /* Floating-point registers. */
259 if (regno
>= FP0_REGNUM
&& regno
<= FPLAST_REGNUM
)
261 nr
= regno
- FP0_REGNUM
+ FPR0
;
262 ptrace32 (PT_WRITE_FPR
, inferior_pid
, addr
, nr
, 0);
265 /* Bogus register number. */
266 else if (regno
> LAST_UISA_SP_REGNUM
)
268 if (regno
>= NUM_REGS
)
269 fprintf_unfiltered (gdb_stderr
,
270 "gdb error: register no %d not implemented.\n",
274 /* Fixed-point registers. */
277 if (regno
== SP_REGNUM
)
278 /* Execute one dummy instruction (which is a breakpoint) in inferior
279 process to give kernel a chance to do internal housekeeping.
280 Otherwise the following ptrace(2) calls will mess up user stack
281 since kernel will get confused about the bottom of the stack
283 exec_one_dummy_insn ();
285 if (regno
>= FIRST_UISA_SP_REGNUM
)
286 nr
= special_regs
[regno
- FIRST_UISA_SP_REGNUM
];
291 ptrace32 (PT_WRITE_GPR
, inferior_pid
, (int *)nr
, *addr
, 0);
294 /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
295 area, even if the register is really only 32 bits. */
297 if (REGISTER_RAW_SIZE (regno
) == 8)
298 memcpy (&buf
, addr
, 8);
301 ptrace64 (PT_WRITE_GPR
, inferior_pid
, nr
, 0, (int *)&buf
);
307 perror ("ptrace write");
312 /* Read from the inferior all registers if REGNO == -1 and just register
316 fetch_inferior_registers (int regno
)
319 fetch_register (regno
);
323 /* read 32 general purpose registers. */
324 for (regno
= 0; regno
< 32; regno
++)
325 fetch_register (regno
);
327 /* read general purpose floating point registers. */
328 for (regno
= FP0_REGNUM
; regno
<= FPLAST_REGNUM
; regno
++)
329 fetch_register (regno
);
331 /* read special registers. */
332 for (regno
= FIRST_UISA_SP_REGNUM
; regno
<= LAST_UISA_SP_REGNUM
; regno
++)
333 fetch_register (regno
);
337 /* Store our register values back into the inferior.
338 If REGNO is -1, do this for all registers.
339 Otherwise, REGNO specifies which register (so we can save time). */
342 store_inferior_registers (int regno
)
345 store_register (regno
);
349 /* write general purpose registers first! */
350 for (regno
= GPR0
; regno
<= GPR31
; regno
++)
351 store_register (regno
);
353 /* write floating point registers now. */
354 for (regno
= FP0_REGNUM
; regno
<= FPLAST_REGNUM
; regno
++)
355 store_register (regno
);
357 /* write special registers. */
359 for (regno
= FIRST_UISA_SP_REGNUM
; regno
<= LAST_UISA_SP_REGNUM
; regno
++)
360 store_register (regno
);
364 /* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child
365 process, which is 64-bit if ARCH64 and 32-bit otherwise. Return
369 read_word (CORE_ADDR from
, int *to
, int arch64
)
371 /* Retrieved values may be -1, so infer errors from errno. */
375 *to
= ptrace64 (PT_READ_I
, inferior_pid
, from
, 0, NULL
);
377 *to
= ptrace32 (PT_READ_I
, inferior_pid
, (int *)(long) from
, 0, NULL
);
382 /* Copy LEN bytes to or from inferior's memory starting at MEMADDR
383 to debugger memory starting at MYADDR. Copy to inferior if
386 Returns the length copied, which is either the LEN argument or zero.
387 This xfer function does not do partial moves, since child_ops
388 doesn't allow memory operations to cross below us in the target stack
392 child_xfer_memory (CORE_ADDR memaddr
, char *myaddr
, int len
,
393 int write
, struct target_ops
*target
)
395 /* Round starting address down to 32-bit word boundary. */
396 int mask
= sizeof (int) - 1;
397 CORE_ADDR addr
= memaddr
& ~(CORE_ADDR
)mask
;
399 /* Round ending address up to 32-bit word boundary. */
400 int count
= ((memaddr
+ len
- addr
+ mask
) & ~(CORE_ADDR
)mask
)
403 /* Allocate word transfer buffer. */
404 int *buf
= (int *) alloca (count
* sizeof (int));
406 int arch64
= ARCH64 ();
411 /* Retrieve memory a word at a time. */
412 for (i
= 0; i
< count
; i
++, addr
+= sizeof (int))
414 if (!read_word (addr
, buf
+ i
, arch64
))
419 /* Copy memory to supplied buffer. */
420 addr
-= count
* sizeof (int);
421 memcpy (myaddr
, (char *)buf
+ (memaddr
- addr
), len
);
425 /* Fetch leading memory needed for alignment. */
427 if (!read_word (addr
, buf
, arch64
))
430 /* Fetch trailing memory needed for alignment. */
431 if (addr
+ count
* sizeof (int) > memaddr
+ len
)
432 if (!read_word (addr
, buf
+ count
- 1, arch64
))
435 /* Copy supplied data into memory buffer. */
436 memcpy ((char *)buf
+ (memaddr
- addr
), myaddr
, len
);
438 /* Store memory one word at a time. */
439 for (i
= 0, errno
= 0; i
< count
; i
++, addr
+= sizeof (int))
442 ptrace64 (PT_WRITE_D
, inferior_pid
, addr
, buf
[i
], NULL
);
444 ptrace32 (PT_WRITE_D
, inferior_pid
, (int *)(long) addr
,
456 /* Execute one dummy breakpoint instruction. This way we give the kernel
457 a chance to do some housekeeping and update inferior's internal data,
461 exec_one_dummy_insn (void)
463 #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
465 char shadow_contents
[BREAKPOINT_MAX
]; /* Stash old bkpt addr contents */
466 int ret
, status
, pid
;
469 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
470 assume that this address will never be executed again by the real
473 target_insert_breakpoint (DUMMY_INSN_ADDR
, shadow_contents
);
475 /* You might think this could be done with a single ptrace call, and
476 you'd be correct for just about every platform I've ever worked
477 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
478 the inferior never hits the breakpoint (it's also worth noting
479 powerpc-ibm-aix4.1.3 works correctly). */
480 prev_pc
= read_pc ();
481 write_pc (DUMMY_INSN_ADDR
);
483 ret
= ptrace64 (PT_CONTINUE
, inferior_pid
, 1, 0, NULL
);
485 ret
= ptrace32 (PT_CONTINUE
, inferior_pid
, (int *)1, 0, NULL
);
488 perror ("pt_continue");
492 pid
= wait (&status
);
494 while (pid
!= inferior_pid
);
497 target_remove_breakpoint (DUMMY_INSN_ADDR
, shadow_contents
);
500 /* Fetch registers from the register section in core bfd. */
503 fetch_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
504 int which
, CORE_ADDR reg_addr
)
509 void *gprs
, *sprs
[7];
515 "Gdb error: unknown parameter to fetch_core_registers().\n");
520 regs
= (CoreRegs
*) core_reg_sect
;
522 /* Retrieve register pointers. */
526 gprs
= regs
->r64
.gpr
;
527 fprs
= regs
->r64
.fpr
;
528 sprs
[0] = ®s
->r64
.iar
;
529 sprs
[1] = ®s
->r64
.msr
;
530 sprs
[2] = ®s
->r64
.cr
;
531 sprs
[3] = ®s
->r64
.lr
;
532 sprs
[4] = ®s
->r64
.ctr
;
533 sprs
[5] = ®s
->r64
.xer
;
537 gprs
= regs
->r32
.gpr
;
538 fprs
= regs
->r32
.fpr
;
539 sprs
[0] = ®s
->r32
.iar
;
540 sprs
[1] = ®s
->r32
.msr
;
541 sprs
[2] = ®s
->r32
.cr
;
542 sprs
[3] = ®s
->r32
.lr
;
543 sprs
[4] = ®s
->r32
.ctr
;
544 sprs
[5] = ®s
->r32
.xer
;
545 sprs
[6] = ®s
->r32
.mq
;
548 /* Copy from pointers to registers[]. */
550 memcpy (registers
, gprs
, 32 * (arch64
? 8 : 4));
551 memcpy (registers
+ REGISTER_BYTE (FP0_REGNUM
), fprs
, 32 * 8);
552 for (i
= FIRST_UISA_SP_REGNUM
; i
<= LAST_UISA_SP_REGNUM
; i
++)
554 size
= REGISTER_RAW_SIZE (i
);
556 memcpy (registers
+ REGISTER_BYTE (i
),
557 sprs
[i
- FIRST_UISA_SP_REGNUM
], size
);
562 /* Copy information about text and data sections from LDI to VP for a 64-bit
563 process if ARCH64 and for a 32-bit process otherwise. */
566 vmap_secs (struct vmap
*vp
, LdInfo
*ldi
, int arch64
)
570 vp
->tstart
= (CORE_ADDR
) ldi
->l64
.ldinfo_textorg
;
571 vp
->tend
= vp
->tstart
+ ldi
->l64
.ldinfo_textsize
;
572 vp
->dstart
= (CORE_ADDR
) ldi
->l64
.ldinfo_dataorg
;
573 vp
->dend
= vp
->dstart
+ ldi
->l64
.ldinfo_datasize
;
577 vp
->tstart
= (unsigned long) ldi
->l32
.ldinfo_textorg
;
578 vp
->tend
= vp
->tstart
+ ldi
->l32
.ldinfo_textsize
;
579 vp
->dstart
= (unsigned long) ldi
->l32
.ldinfo_dataorg
;
580 vp
->dend
= vp
->dstart
+ ldi
->l32
.ldinfo_datasize
;
583 /* The run time loader maps the file header in addition to the text
584 section and returns a pointer to the header in ldinfo_textorg.
585 Adjust the text start address to point to the real start address
586 of the text section. */
587 vp
->tstart
+= vp
->toffs
;
590 /* handle symbol translation on vmapping */
593 vmap_symtab (struct vmap
*vp
)
595 register struct objfile
*objfile
;
596 struct section_offsets
*new_offsets
;
599 objfile
= vp
->objfile
;
602 /* OK, it's not an objfile we opened ourselves.
603 Currently, that can only happen with the exec file, so
604 relocate the symbols for the symfile. */
605 if (symfile_objfile
== NULL
)
607 objfile
= symfile_objfile
;
609 else if (!vp
->loaded
)
610 /* If symbols are not yet loaded, offsets are not yet valid. */
613 new_offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
615 for (i
= 0; i
< objfile
->num_sections
; ++i
)
616 new_offsets
->offsets
[i
] = ANOFFSET (objfile
->section_offsets
, i
);
618 /* The symbols in the object file are linked to the VMA of the section,
619 relocate them VMA relative. */
620 new_offsets
->offsets
[SECT_OFF_TEXT (objfile
)] = vp
->tstart
- vp
->tvma
;
621 new_offsets
->offsets
[SECT_OFF_DATA (objfile
)] = vp
->dstart
- vp
->dvma
;
622 new_offsets
->offsets
[SECT_OFF_BSS (objfile
)] = vp
->dstart
- vp
->dvma
;
624 objfile_relocate (objfile
, new_offsets
);
627 /* Add symbols for an objfile. */
630 objfile_symbol_add (void *arg
)
632 struct objfile
*obj
= (struct objfile
*) arg
;
634 syms_from_objfile (obj
, NULL
, 0, 0);
635 new_symfile_objfile (obj
, 0, 0);
639 /* Add symbols for a vmap. Return zero upon error. */
642 vmap_add_symbols (struct vmap
*vp
)
644 if (catch_errors (objfile_symbol_add
, vp
->objfile
,
645 "Error while reading shared library symbols:\n",
648 /* Note this is only done if symbol reading was successful. */
656 /* Add a new vmap entry based on ldinfo() information.
658 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
659 core file), the caller should set it to -1, and we will open the file.
661 Return the vmap new entry. */
664 add_vmap (LdInfo
*ldi
)
667 register char *mem
, *objname
, *filename
;
671 ARCH64_DECL (arch64
);
673 /* This ldi structure was allocated using alloca() in
674 xcoff_relocate_symtab(). Now we need to have persistent object
675 and member names, so we should save them. */
677 filename
= LDI_FILENAME (ldi
, arch64
);
678 mem
= filename
+ strlen (filename
) + 1;
679 mem
= savestring (mem
, strlen (mem
));
680 objname
= savestring (filename
, strlen (filename
));
682 fd
= LDI_FD (ldi
, arch64
);
684 /* Note that this opens it once for every member; a possible
685 enhancement would be to only open it once for every object. */
686 abfd
= bfd_openr (objname
, gnutarget
);
688 abfd
= bfd_fdopenr (objname
, gnutarget
, fd
);
691 warning ("Could not open `%s' as an executable file: %s",
692 objname
, bfd_errmsg (bfd_get_error ()));
696 /* make sure we have an object file */
698 if (bfd_check_format (abfd
, bfd_object
))
699 vp
= map_vmap (abfd
, 0);
701 else if (bfd_check_format (abfd
, bfd_archive
))
704 /* FIXME??? am I tossing BFDs? bfd? */
705 while ((last
= bfd_openr_next_archived_file (abfd
, last
)))
706 if (STREQ (mem
, last
->filename
))
711 warning ("\"%s\": member \"%s\" missing.", objname
, mem
);
716 if (!bfd_check_format (last
, bfd_object
))
718 warning ("\"%s\": member \"%s\" not in executable format: %s.",
719 objname
, mem
, bfd_errmsg (bfd_get_error ()));
725 vp
= map_vmap (last
, abfd
);
729 warning ("\"%s\": not in executable format: %s.",
730 objname
, bfd_errmsg (bfd_get_error ()));
734 obj
= allocate_objfile (vp
->bfd
, 0);
737 /* Always add symbols for the main objfile. */
738 if (vp
== vmap
|| auto_solib_add
)
739 vmap_add_symbols (vp
);
743 /* update VMAP info with ldinfo() information
744 Input is ptr to ldinfo() results. */
747 vmap_ldinfo (LdInfo
*ldi
)
750 register struct vmap
*vp
;
751 int got_one
, retried
;
752 int got_exec_file
= 0;
754 int arch64
= ARCH64 ();
756 /* For each *ldi, see if we have a corresponding *vp.
757 If so, update the mapping, and symbol table.
758 If not, add an entry and symbol table. */
762 char *name
= LDI_FILENAME (ldi
, arch64
);
763 char *memb
= name
+ strlen (name
) + 1;
764 int fd
= LDI_FD (ldi
, arch64
);
768 if (fstat (fd
, &ii
) < 0)
770 /* The kernel sets ld_info to -1, if the process is still using the
771 object, and the object is removed. Keep the symbol info for the
772 removed object and issue a warning. */
773 warning ("%s (fd=%d) has disappeared, keeping its symbols",
778 for (got_one
= 0, vp
= vmap
; vp
; vp
= vp
->nxt
)
780 struct objfile
*objfile
;
782 /* First try to find a `vp', which is the same as in ldinfo.
783 If not the same, just continue and grep the next `vp'. If same,
784 relocate its tstart, tend, dstart, dend values. If no such `vp'
785 found, get out of this for loop, add this ldi entry as a new vmap
786 (add_vmap) and come back, find its `vp' and so on... */
788 /* The filenames are not always sufficient to match on. */
790 if ((name
[0] == '/' && !STREQ (name
, vp
->name
))
791 || (memb
[0] && !STREQ (memb
, vp
->member
)))
794 /* See if we are referring to the same file.
795 We have to check objfile->obfd, symfile.c:reread_symbols might
796 have updated the obfd after a change. */
797 objfile
= vp
->objfile
== NULL
? symfile_objfile
: vp
->objfile
;
799 || objfile
->obfd
== NULL
800 || bfd_stat (objfile
->obfd
, &vi
) < 0)
802 warning ("Unable to stat %s, keeping its symbols", name
);
806 if (ii
.st_dev
!= vi
.st_dev
|| ii
.st_ino
!= vi
.st_ino
)
814 /* Found a corresponding VMAP. Remap! */
816 vmap_secs (vp
, ldi
, arch64
);
818 /* The objfile is only NULL for the exec file. */
819 if (vp
->objfile
== NULL
)
822 /* relocate symbol table(s). */
825 /* There may be more, so we don't break out of the loop. */
828 /* if there was no matching *vp, we must perforce create the sucker(s) */
829 if (!got_one
&& !retried
)
836 while ((next
= LDI_NEXT (ldi
, arch64
))
837 && (ldi
= (void *) (next
+ (char *) ldi
)));
839 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
840 is unlikely that the symbol file is relocated to the proper
841 address. And we might have attached to a process which is
842 running a different copy of the same executable. */
843 if (symfile_objfile
!= NULL
&& !got_exec_file
)
846 fputs_unfiltered ("Symbol file ", gdb_stderr
);
847 fputs_unfiltered (symfile_objfile
->name
, gdb_stderr
);
848 fputs_unfiltered ("\nis not mapped; discarding it.\n\
849 If in fact that file has symbols which the mapped files listed by\n\
850 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
851 \"add-symbol-file\" commands (note that you must take care of relocating\n\
852 symbols to the proper address).\n", gdb_stderr
);
853 free_objfile (symfile_objfile
);
854 symfile_objfile
= NULL
;
856 breakpoint_re_set ();
859 /* As well as symbol tables, exec_sections need relocation. After
860 the inferior process' termination, there will be a relocated symbol
861 table exist with no corresponding inferior process. At that time, we
862 need to use `exec' bfd, rather than the inferior process's memory space
865 `exec_sections' need to be relocated only once, as long as the exec
866 file remains unchanged.
875 if (execbfd
== exec_bfd
)
880 if (!vmap
|| !exec_ops
.to_sections
)
881 error ("vmap_exec: vmap or exec_ops.to_sections == 0\n");
883 for (i
= 0; &exec_ops
.to_sections
[i
] < exec_ops
.to_sections_end
; i
++)
885 if (STREQ (".text", exec_ops
.to_sections
[i
].the_bfd_section
->name
))
887 exec_ops
.to_sections
[i
].addr
+= vmap
->tstart
- vmap
->tvma
;
888 exec_ops
.to_sections
[i
].endaddr
+= vmap
->tstart
- vmap
->tvma
;
890 else if (STREQ (".data", exec_ops
.to_sections
[i
].the_bfd_section
->name
))
892 exec_ops
.to_sections
[i
].addr
+= vmap
->dstart
- vmap
->dvma
;
893 exec_ops
.to_sections
[i
].endaddr
+= vmap
->dstart
- vmap
->dvma
;
895 else if (STREQ (".bss", exec_ops
.to_sections
[i
].the_bfd_section
->name
))
897 exec_ops
.to_sections
[i
].addr
+= vmap
->dstart
- vmap
->dvma
;
898 exec_ops
.to_sections
[i
].endaddr
+= vmap
->dstart
- vmap
->dvma
;
903 /* Set the current architecture from the host running GDB. Called when
904 starting a child process. */
907 set_host_arch (int pid
)
909 enum bfd_architecture arch
;
912 struct gdbarch_info info
;
916 arch
= bfd_arch_rs6000
;
917 mach
= bfd_mach_rs6k
;
921 arch
= bfd_arch_powerpc
;
924 bfd_default_set_arch_mach (&abfd
, arch
, mach
);
926 memset (&info
, 0, sizeof info
);
927 info
.bfd_arch_info
= bfd_get_arch_info (&abfd
);
929 if (!gdbarch_update_p (info
))
931 internal_error (__FILE__
, __LINE__
,
932 "set_host_arch: failed to select architecture");
937 /* xcoff_relocate_symtab - hook for symbol table relocation.
938 also reads shared libraries.. */
941 xcoff_relocate_symtab (unsigned int pid
)
943 int load_segs
= 64; /* number of load segments */
946 int arch64
= ARCH64 ();
947 int ldisize
= arch64
? sizeof (ldi
->l64
) : sizeof (ldi
->l32
);
952 size
= load_segs
* ldisize
;
953 ldi
= (void *) xrealloc (ldi
, size
);
956 /* According to my humble theory, AIX has some timing problems and
957 when the user stack grows, kernel doesn't update stack info in time
958 and ptrace calls step on user stack. That is why we sleep here a
959 little, and give kernel to update its internals. */
964 rc
= ptrace64 (PT_LDINFO
, pid
, (unsigned long) ldi
, size
, NULL
);
966 rc
= ptrace32 (PT_LDINFO
, pid
, (int *) ldi
, size
, NULL
);
973 perror_with_name ("ptrace ldinfo");
978 vmap_exec (); /* relocate the exec and core sections as well. */
985 /* Core file stuff. */
987 /* Relocate symtabs and read in shared library info, based on symbols
988 from the core file. */
991 xcoff_relocate_core (struct target_ops
*target
)
997 int arch64
= ARCH64 ();
999 /* Size of a struct ld_info except for the variable-length filename. */
1000 int nonfilesz
= (int)LDI_FILENAME ((LdInfo
*)0, arch64
);
1002 /* Allocated size of buffer. */
1003 int buffer_size
= nonfilesz
;
1004 char *buffer
= xmalloc (buffer_size
);
1005 struct cleanup
*old
= make_cleanup (free_current_contents
, &buffer
);
1007 ldinfo_sec
= bfd_get_section_by_name (core_bfd
, ".ldinfo");
1008 if (ldinfo_sec
== NULL
)
1011 fprintf_filtered (gdb_stderr
, "Couldn't get ldinfo from core file: %s\n",
1012 bfd_errmsg (bfd_get_error ()));
1019 int names_found
= 0;
1021 /* Read in everything but the name. */
1022 if (bfd_get_section_contents (core_bfd
, ldinfo_sec
, buffer
,
1023 offset
, nonfilesz
) == 0)
1030 if (i
== buffer_size
)
1033 buffer
= xrealloc (buffer
, buffer_size
);
1035 if (bfd_get_section_contents (core_bfd
, ldinfo_sec
, &buffer
[i
],
1036 offset
+ i
, 1) == 0)
1038 if (buffer
[i
++] == '\0')
1041 while (names_found
< 2);
1043 ldi
= (LdInfo
*) buffer
;
1045 /* Can't use a file descriptor from the core file; need to open it. */
1047 ldi
->l64
.ldinfo_fd
= -1;
1049 ldi
->l32
.ldinfo_fd
= -1;
1051 /* The first ldinfo is for the exec file, allocated elsewhere. */
1052 if (offset
== 0 && vmap
!= NULL
)
1055 vp
= add_vmap (ldi
);
1057 /* Process next shared library upon error. */
1058 offset
+= LDI_NEXT (ldi
, arch64
);
1062 vmap_secs (vp
, ldi
, arch64
);
1064 /* Unless this is the exec file,
1065 add our sections to the section table for the core target. */
1068 struct section_table
*stp
;
1070 target_resize_to_sections (target
, 2);
1071 stp
= target
->to_sections_end
- 2;
1074 stp
->the_bfd_section
= bfd_get_section_by_name (stp
->bfd
, ".text");
1075 stp
->addr
= vp
->tstart
;
1076 stp
->endaddr
= vp
->tend
;
1080 stp
->the_bfd_section
= bfd_get_section_by_name (stp
->bfd
, ".data");
1081 stp
->addr
= vp
->dstart
;
1082 stp
->endaddr
= vp
->dend
;
1087 while (LDI_NEXT (ldi
, arch64
) != 0);
1089 breakpoint_re_set ();
1094 kernel_u_size (void)
1096 return (sizeof (struct user
));
1099 /* Under AIX, we have to pass the correct TOC pointer to a function
1100 when calling functions in the inferior.
1101 We try to find the relative toc offset of the objfile containing PC
1102 and add the current load address of the data segment from the vmap. */
1105 find_toc_address (CORE_ADDR pc
)
1108 extern CORE_ADDR
get_toc_offset (struct objfile
*); /* xcoffread.c */
1110 for (vp
= vmap
; vp
; vp
= vp
->nxt
)
1112 if (pc
>= vp
->tstart
&& pc
< vp
->tend
)
1114 /* vp->objfile is only NULL for the exec file. */
1115 return vp
->dstart
+ get_toc_offset (vp
->objfile
== NULL
1120 error ("Unable to find TOC entry for pc 0x%x\n", pc
);
1123 /* Register that we are able to handle rs6000 core file formats. */
1125 static struct core_fns rs6000_core_fns
=
1127 bfd_target_xcoff_flavour
, /* core_flavour */
1128 default_check_format
, /* check_format */
1129 default_core_sniffer
, /* core_sniffer */
1130 fetch_core_registers
, /* core_read_registers */
1135 _initialize_core_rs6000 (void)
1137 /* Initialize hook in rs6000-tdep.c for determining the TOC address when
1138 calling functions in the inferior. */
1139 rs6000_find_toc_address_hook
= find_toc_address
;
1141 /* Initialize hook in rs6000-tdep.c to set the current architecture when
1142 starting a child process. */
1143 rs6000_set_host_arch_hook
= set_host_arch
;
1145 add_core_fns (&rs6000_core_fns
);