1 /* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
3 Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "xcoffsolib.h"
29 #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */
31 #include "exceptions.h"
32 #include "gdb-stabs.h"
34 #include "arch-utils.h"
35 #include "inf-ptrace.h"
37 #include "rs6000-tdep.h"
41 #include <sys/ptrace.h>
44 #include <sys/param.h>
48 #include <sys/ioctl.h>
56 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
57 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
59 #include <sys/systemcfg.h>
61 /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
62 debugging 32-bit and 64-bit processes. Define a typedef and macros for
63 accessing fields in the appropriate structures. */
65 /* In 32-bit compilation mode (which is the only mode from which ptrace()
66 works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
72 /* Return whether the current architecture is 64-bit. */
77 # define ARCH64() (register_size (current_gdbarch, 0) == 8)
80 /* Union of 32-bit and 64-bit versions of ld_info. */
87 struct __ld_info32 l32
;
88 struct __ld_info64 l64
;
92 /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
93 declare and initialize a variable named VAR suitable for use as the arch64
94 parameter to the various LDI_*() macros. */
97 # define ARCH64_DECL(var)
99 # define ARCH64_DECL(var) int var = ARCH64 ()
102 /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
103 otherwise. This technique only works for FIELDs with the same data type in
104 32-bit and 64-bit versions of ld_info. */
107 # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
109 # define LDI_FIELD(ldi, arch64, field) \
110 (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
113 /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
114 process otherwise. */
116 #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
117 #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
118 #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
120 extern struct vmap
*map_vmap (bfd
* bf
, bfd
* arch
);
122 static void vmap_exec (void);
124 static void vmap_ldinfo (LdInfo
*);
126 static struct vmap
*add_vmap (LdInfo
*);
128 static int objfile_symbol_add (void *);
130 static void vmap_symtab (struct vmap
*);
132 static void exec_one_dummy_insn (struct gdbarch
*);
134 extern void fixup_breakpoints (CORE_ADDR low
, CORE_ADDR high
, CORE_ADDR delta
);
136 /* Given REGNO, a gdb register number, return the corresponding
137 number suitable for use as a ptrace() parameter. Return -1 if
138 there's no suitable mapping. Also, set the int pointed to by
139 ISFLOAT to indicate whether REGNO is a floating point register. */
142 regmap (struct gdbarch
*gdbarch
, int regno
, int *isfloat
)
144 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
147 if (tdep
->ppc_gp0_regnum
<= regno
148 && regno
< tdep
->ppc_gp0_regnum
+ ppc_num_gprs
)
150 else if (tdep
->ppc_fp0_regnum
>= 0
151 && tdep
->ppc_fp0_regnum
<= regno
152 && regno
< tdep
->ppc_fp0_regnum
+ ppc_num_fprs
)
155 return regno
- tdep
->ppc_fp0_regnum
+ FPR0
;
157 else if (regno
== gdbarch_pc_regnum (gdbarch
))
159 else if (regno
== tdep
->ppc_ps_regnum
)
161 else if (regno
== tdep
->ppc_cr_regnum
)
163 else if (regno
== tdep
->ppc_lr_regnum
)
165 else if (regno
== tdep
->ppc_ctr_regnum
)
167 else if (regno
== tdep
->ppc_xer_regnum
)
169 else if (tdep
->ppc_fpscr_regnum
>= 0
170 && regno
== tdep
->ppc_fpscr_regnum
)
172 else if (tdep
->ppc_mq_regnum
>= 0 && regno
== tdep
->ppc_mq_regnum
)
178 /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
181 rs6000_ptrace32 (int req
, int id
, int *addr
, int data
, int *buf
)
183 int ret
= ptrace (req
, id
, (int *)addr
, data
, buf
);
185 printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
186 req
, id
, (unsigned int)addr
, data
, (unsigned int)buf
, ret
);
191 /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
194 rs6000_ptrace64 (int req
, int id
, long long addr
, int data
, void *buf
)
197 int ret
= ptracex (req
, id
, addr
, data
, buf
);
202 printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
203 req
, id
, addr
, data
, (unsigned int)buf
, ret
);
208 /* Fetch register REGNO from the inferior. */
211 fetch_register (struct regcache
*regcache
, int regno
)
213 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
214 int addr
[MAX_REGISTER_SIZE
];
217 /* Retrieved values may be -1, so infer errors from errno. */
220 nr
= regmap (gdbarch
, regno
, &isfloat
);
222 /* Floating-point registers. */
224 rs6000_ptrace32 (PT_READ_FPR
, PIDGET (inferior_ptid
), addr
, nr
, 0);
226 /* Bogus register number. */
229 if (regno
>= gdbarch_num_regs (gdbarch
))
230 fprintf_unfiltered (gdb_stderr
,
231 "gdb error: register no %d not implemented.\n",
236 /* Fixed-point registers. */
240 *addr
= rs6000_ptrace32 (PT_READ_GPR
, PIDGET (inferior_ptid
), (int *)nr
, 0, 0);
243 /* PT_READ_GPR requires the buffer parameter to point to long long,
244 even if the register is really only 32 bits. */
246 rs6000_ptrace64 (PT_READ_GPR
, PIDGET (inferior_ptid
), nr
, 0, &buf
);
247 if (register_size (gdbarch
, regno
) == 8)
248 memcpy (addr
, &buf
, 8);
255 regcache_raw_supply (regcache
, regno
, (char *) addr
);
259 /* FIXME: this happens 3 times at the start of each 64-bit program. */
260 perror ("ptrace read");
266 /* Store register REGNO back into the inferior. */
269 store_register (const struct regcache
*regcache
, int regno
)
271 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
272 int addr
[MAX_REGISTER_SIZE
];
275 /* Fetch the register's value from the register cache. */
276 regcache_raw_collect (regcache
, regno
, addr
);
278 /* -1 can be a successful return value, so infer errors from errno. */
281 nr
= regmap (gdbarch
, regno
, &isfloat
);
283 /* Floating-point registers. */
285 rs6000_ptrace32 (PT_WRITE_FPR
, PIDGET (inferior_ptid
), addr
, nr
, 0);
287 /* Bogus register number. */
290 if (regno
>= gdbarch_num_regs (gdbarch
))
291 fprintf_unfiltered (gdb_stderr
,
292 "gdb error: register no %d not implemented.\n",
296 /* Fixed-point registers. */
299 if (regno
== gdbarch_sp_regnum (gdbarch
))
300 /* Execute one dummy instruction (which is a breakpoint) in inferior
301 process to give kernel a chance to do internal housekeeping.
302 Otherwise the following ptrace(2) calls will mess up user stack
303 since kernel will get confused about the bottom of the stack
305 exec_one_dummy_insn (gdbarch
);
307 /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors,
308 the register's value is passed by value, but for 64-bit inferiors,
309 the address of a buffer containing the value is passed. */
311 rs6000_ptrace32 (PT_WRITE_GPR
, PIDGET (inferior_ptid
), (int *)nr
, *addr
, 0);
314 /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
315 area, even if the register is really only 32 bits. */
317 if (register_size (gdbarch
, regno
) == 8)
318 memcpy (&buf
, addr
, 8);
321 rs6000_ptrace64 (PT_WRITE_GPR
, PIDGET (inferior_ptid
), nr
, 0, &buf
);
327 perror ("ptrace write");
332 /* Read from the inferior all registers if REGNO == -1 and just register
336 rs6000_fetch_inferior_registers (struct regcache
*regcache
, int regno
)
338 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
340 fetch_register (regcache
, regno
);
344 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
346 /* Read 32 general purpose registers. */
347 for (regno
= tdep
->ppc_gp0_regnum
;
348 regno
< tdep
->ppc_gp0_regnum
+ ppc_num_gprs
;
351 fetch_register (regcache
, regno
);
354 /* Read general purpose floating point registers. */
355 if (tdep
->ppc_fp0_regnum
>= 0)
356 for (regno
= 0; regno
< ppc_num_fprs
; regno
++)
357 fetch_register (regcache
, tdep
->ppc_fp0_regnum
+ regno
);
359 /* Read special registers. */
360 fetch_register (regcache
, gdbarch_pc_regnum (gdbarch
));
361 fetch_register (regcache
, tdep
->ppc_ps_regnum
);
362 fetch_register (regcache
, tdep
->ppc_cr_regnum
);
363 fetch_register (regcache
, tdep
->ppc_lr_regnum
);
364 fetch_register (regcache
, tdep
->ppc_ctr_regnum
);
365 fetch_register (regcache
, tdep
->ppc_xer_regnum
);
366 if (tdep
->ppc_fpscr_regnum
>= 0)
367 fetch_register (regcache
, tdep
->ppc_fpscr_regnum
);
368 if (tdep
->ppc_mq_regnum
>= 0)
369 fetch_register (regcache
, tdep
->ppc_mq_regnum
);
373 /* Store our register values back into the inferior.
374 If REGNO is -1, do this for all registers.
375 Otherwise, REGNO specifies which register (so we can save time). */
378 rs6000_store_inferior_registers (struct regcache
*regcache
, int regno
)
380 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
382 store_register (regcache
, regno
);
386 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
388 /* Write general purpose registers first. */
389 for (regno
= tdep
->ppc_gp0_regnum
;
390 regno
< tdep
->ppc_gp0_regnum
+ ppc_num_gprs
;
393 store_register (regcache
, regno
);
396 /* Write floating point registers. */
397 if (tdep
->ppc_fp0_regnum
>= 0)
398 for (regno
= 0; regno
< ppc_num_fprs
; regno
++)
399 store_register (regcache
, tdep
->ppc_fp0_regnum
+ regno
);
401 /* Write special registers. */
402 store_register (regcache
, gdbarch_pc_regnum (gdbarch
));
403 store_register (regcache
, tdep
->ppc_ps_regnum
);
404 store_register (regcache
, tdep
->ppc_cr_regnum
);
405 store_register (regcache
, tdep
->ppc_lr_regnum
);
406 store_register (regcache
, tdep
->ppc_ctr_regnum
);
407 store_register (regcache
, tdep
->ppc_xer_regnum
);
408 if (tdep
->ppc_fpscr_regnum
>= 0)
409 store_register (regcache
, tdep
->ppc_fpscr_regnum
);
410 if (tdep
->ppc_mq_regnum
>= 0)
411 store_register (regcache
, tdep
->ppc_mq_regnum
);
416 /* Attempt a transfer all LEN bytes starting at OFFSET between the
417 inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
418 Return the number of bytes actually transferred. */
421 rs6000_xfer_partial (struct target_ops
*ops
, enum target_object object
,
422 const char *annex
, gdb_byte
*readbuf
,
423 const gdb_byte
*writebuf
,
424 ULONGEST offset
, LONGEST len
)
426 pid_t pid
= ptid_get_pid (inferior_ptid
);
427 int arch64
= ARCH64 ();
431 case TARGET_OBJECT_MEMORY
:
435 PTRACE_TYPE_RET word
;
436 gdb_byte byte
[sizeof (PTRACE_TYPE_RET
)];
438 ULONGEST rounded_offset
;
441 /* Round the start offset down to the next long word
443 rounded_offset
= offset
& -(ULONGEST
) sizeof (PTRACE_TYPE_RET
);
445 /* Since ptrace will transfer a single word starting at that
446 rounded_offset the partial_len needs to be adjusted down to
447 that (remember this function only does a single transfer).
448 Should the required length be even less, adjust it down
450 partial_len
= (rounded_offset
+ sizeof (PTRACE_TYPE_RET
)) - offset
;
451 if (partial_len
> len
)
456 /* If OFFSET:PARTIAL_LEN is smaller than
457 ROUNDED_OFFSET:WORDSIZE then a read/modify write will
458 be needed. Read in the entire word. */
459 if (rounded_offset
< offset
460 || (offset
+ partial_len
461 < rounded_offset
+ sizeof (PTRACE_TYPE_RET
)))
463 /* Need part of initial word -- fetch it. */
465 buffer
.word
= rs6000_ptrace64 (PT_READ_I
, pid
,
466 rounded_offset
, 0, NULL
);
468 buffer
.word
= rs6000_ptrace32 (PT_READ_I
, pid
,
469 (int *)(uintptr_t)rounded_offset
,
473 /* Copy data to be written over corresponding part of
475 memcpy (buffer
.byte
+ (offset
- rounded_offset
),
476 writebuf
, partial_len
);
480 rs6000_ptrace64 (PT_WRITE_D
, pid
,
481 rounded_offset
, buffer
.word
, NULL
);
483 rs6000_ptrace32 (PT_WRITE_D
, pid
,
484 (int *)(uintptr_t)rounded_offset
, buffer
.word
, NULL
);
493 buffer
.word
= rs6000_ptrace64 (PT_READ_I
, pid
,
494 rounded_offset
, 0, NULL
);
496 buffer
.word
= rs6000_ptrace32 (PT_READ_I
, pid
,
497 (int *)(uintptr_t)rounded_offset
,
502 /* Copy appropriate bytes out of the buffer. */
503 memcpy (readbuf
, buffer
.byte
+ (offset
- rounded_offset
),
515 /* Wait for the child specified by PTID to do something. Return the
516 process ID of the child, or MINUS_ONE_PTID in case of error; store
517 the status in *OURSTATUS. */
520 rs6000_wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
)
523 int status
, save_errno
;
531 pid
= waitpid (ptid_get_pid (ptid
), &status
, 0);
534 while (pid
== -1 && errno
== EINTR
);
536 clear_sigint_trap ();
540 fprintf_unfiltered (gdb_stderr
,
541 _("Child process unexpectedly missing: %s.\n"),
542 safe_strerror (save_errno
));
544 /* Claim it exited with unknown signal. */
545 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
546 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
547 return inferior_ptid
;
550 /* Ignore terminated detached child processes. */
551 if (!WIFSTOPPED (status
) && pid
!= ptid_get_pid (inferior_ptid
))
556 /* AIX has a couple of strange returns from wait(). */
558 /* stop after load" status. */
560 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
561 /* signal 0. I have no idea why wait(2) returns with this status word. */
562 else if (status
== 0x7f)
563 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
564 /* A normal waitstatus. Let the usual macros deal with it. */
566 store_waitstatus (ourstatus
, status
);
568 return pid_to_ptid (pid
);
571 /* Execute one dummy breakpoint instruction. This way we give the kernel
572 a chance to do some housekeeping and update inferior's internal data,
576 exec_one_dummy_insn (struct gdbarch
*gdbarch
)
578 #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200
580 int ret
, status
, pid
;
584 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
585 assume that this address will never be executed again by the real
588 bp
= deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR
);
590 /* You might think this could be done with a single ptrace call, and
591 you'd be correct for just about every platform I've ever worked
592 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
593 the inferior never hits the breakpoint (it's also worth noting
594 powerpc-ibm-aix4.1.3 works correctly). */
595 prev_pc
= read_pc ();
596 write_pc (DUMMY_INSN_ADDR
);
598 ret
= rs6000_ptrace64 (PT_CONTINUE
, PIDGET (inferior_ptid
), 1, 0, NULL
);
600 ret
= rs6000_ptrace32 (PT_CONTINUE
, PIDGET (inferior_ptid
), (int *)1, 0, NULL
);
603 perror ("pt_continue");
607 pid
= wait (&status
);
609 while (pid
!= PIDGET (inferior_ptid
));
612 deprecated_remove_raw_breakpoint (bp
);
616 /* Copy information about text and data sections from LDI to VP for a 64-bit
617 process if ARCH64 and for a 32-bit process otherwise. */
620 vmap_secs (struct vmap
*vp
, LdInfo
*ldi
, int arch64
)
624 vp
->tstart
= (CORE_ADDR
) ldi
->l64
.ldinfo_textorg
;
625 vp
->tend
= vp
->tstart
+ ldi
->l64
.ldinfo_textsize
;
626 vp
->dstart
= (CORE_ADDR
) ldi
->l64
.ldinfo_dataorg
;
627 vp
->dend
= vp
->dstart
+ ldi
->l64
.ldinfo_datasize
;
631 vp
->tstart
= (unsigned long) ldi
->l32
.ldinfo_textorg
;
632 vp
->tend
= vp
->tstart
+ ldi
->l32
.ldinfo_textsize
;
633 vp
->dstart
= (unsigned long) ldi
->l32
.ldinfo_dataorg
;
634 vp
->dend
= vp
->dstart
+ ldi
->l32
.ldinfo_datasize
;
637 /* The run time loader maps the file header in addition to the text
638 section and returns a pointer to the header in ldinfo_textorg.
639 Adjust the text start address to point to the real start address
640 of the text section. */
641 vp
->tstart
+= vp
->toffs
;
644 /* handle symbol translation on vmapping */
647 vmap_symtab (struct vmap
*vp
)
649 struct objfile
*objfile
;
650 struct section_offsets
*new_offsets
;
653 objfile
= vp
->objfile
;
656 /* OK, it's not an objfile we opened ourselves.
657 Currently, that can only happen with the exec file, so
658 relocate the symbols for the symfile. */
659 if (symfile_objfile
== NULL
)
661 objfile
= symfile_objfile
;
663 else if (!vp
->loaded
)
664 /* If symbols are not yet loaded, offsets are not yet valid. */
668 (struct section_offsets
*)
669 alloca (SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
671 for (i
= 0; i
< objfile
->num_sections
; ++i
)
672 new_offsets
->offsets
[i
] = ANOFFSET (objfile
->section_offsets
, i
);
674 /* The symbols in the object file are linked to the VMA of the section,
675 relocate them VMA relative. */
676 new_offsets
->offsets
[SECT_OFF_TEXT (objfile
)] = vp
->tstart
- vp
->tvma
;
677 new_offsets
->offsets
[SECT_OFF_DATA (objfile
)] = vp
->dstart
- vp
->dvma
;
678 new_offsets
->offsets
[SECT_OFF_BSS (objfile
)] = vp
->dstart
- vp
->dvma
;
680 objfile_relocate (objfile
, new_offsets
);
683 /* Add symbols for an objfile. */
686 objfile_symbol_add (void *arg
)
688 struct objfile
*obj
= (struct objfile
*) arg
;
690 syms_from_objfile (obj
, NULL
, 0, 0, 0, 0);
691 new_symfile_objfile (obj
, 0, 0);
695 /* Add symbols for a vmap. Return zero upon error. */
698 vmap_add_symbols (struct vmap
*vp
)
700 if (catch_errors (objfile_symbol_add
, vp
->objfile
,
701 "Error while reading shared library symbols:\n",
704 /* Note this is only done if symbol reading was successful. */
712 /* Add a new vmap entry based on ldinfo() information.
714 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
715 core file), the caller should set it to -1, and we will open the file.
717 Return the vmap new entry. */
720 add_vmap (LdInfo
*ldi
)
723 char *mem
, *objname
, *filename
;
727 ARCH64_DECL (arch64
);
729 /* This ldi structure was allocated using alloca() in
730 xcoff_relocate_symtab(). Now we need to have persistent object
731 and member names, so we should save them. */
733 filename
= LDI_FILENAME (ldi
, arch64
);
734 mem
= filename
+ strlen (filename
) + 1;
735 mem
= savestring (mem
, strlen (mem
));
736 objname
= savestring (filename
, strlen (filename
));
738 fd
= LDI_FD (ldi
, arch64
);
740 /* Note that this opens it once for every member; a possible
741 enhancement would be to only open it once for every object. */
742 abfd
= bfd_openr (objname
, gnutarget
);
744 abfd
= bfd_fdopenr (objname
, gnutarget
, fd
);
747 warning (_("Could not open `%s' as an executable file: %s"),
748 objname
, bfd_errmsg (bfd_get_error ()));
752 /* make sure we have an object file */
754 if (bfd_check_format (abfd
, bfd_object
))
755 vp
= map_vmap (abfd
, 0);
757 else if (bfd_check_format (abfd
, bfd_archive
))
760 /* FIXME??? am I tossing BFDs? bfd? */
761 while ((last
= bfd_openr_next_archived_file (abfd
, last
)))
762 if (strcmp (mem
, last
->filename
) == 0)
767 warning (_("\"%s\": member \"%s\" missing."), objname
, mem
);
772 if (!bfd_check_format (last
, bfd_object
))
774 warning (_("\"%s\": member \"%s\" not in executable format: %s."),
775 objname
, mem
, bfd_errmsg (bfd_get_error ()));
781 vp
= map_vmap (last
, abfd
);
785 warning (_("\"%s\": not in executable format: %s."),
786 objname
, bfd_errmsg (bfd_get_error ()));
790 obj
= allocate_objfile (vp
->bfd
, 0);
793 /* Always add symbols for the main objfile. */
794 if (vp
== vmap
|| auto_solib_add
)
795 vmap_add_symbols (vp
);
799 /* update VMAP info with ldinfo() information
800 Input is ptr to ldinfo() results. */
803 vmap_ldinfo (LdInfo
*ldi
)
807 int got_one
, retried
;
808 int got_exec_file
= 0;
810 int arch64
= ARCH64 ();
812 /* For each *ldi, see if we have a corresponding *vp.
813 If so, update the mapping, and symbol table.
814 If not, add an entry and symbol table. */
818 char *name
= LDI_FILENAME (ldi
, arch64
);
819 char *memb
= name
+ strlen (name
) + 1;
820 int fd
= LDI_FD (ldi
, arch64
);
824 if (fstat (fd
, &ii
) < 0)
826 /* The kernel sets ld_info to -1, if the process is still using the
827 object, and the object is removed. Keep the symbol info for the
828 removed object and issue a warning. */
829 warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
834 for (got_one
= 0, vp
= vmap
; vp
; vp
= vp
->nxt
)
836 struct objfile
*objfile
;
838 /* First try to find a `vp', which is the same as in ldinfo.
839 If not the same, just continue and grep the next `vp'. If same,
840 relocate its tstart, tend, dstart, dend values. If no such `vp'
841 found, get out of this for loop, add this ldi entry as a new vmap
842 (add_vmap) and come back, find its `vp' and so on... */
844 /* The filenames are not always sufficient to match on. */
846 if ((name
[0] == '/' && strcmp (name
, vp
->name
) != 0)
847 || (memb
[0] && strcmp (memb
, vp
->member
) != 0))
850 /* See if we are referring to the same file.
851 We have to check objfile->obfd, symfile.c:reread_symbols might
852 have updated the obfd after a change. */
853 objfile
= vp
->objfile
== NULL
? symfile_objfile
: vp
->objfile
;
855 || objfile
->obfd
== NULL
856 || bfd_stat (objfile
->obfd
, &vi
) < 0)
858 warning (_("Unable to stat %s, keeping its symbols"), name
);
862 if (ii
.st_dev
!= vi
.st_dev
|| ii
.st_ino
!= vi
.st_ino
)
870 /* Found a corresponding VMAP. Remap! */
872 vmap_secs (vp
, ldi
, arch64
);
874 /* The objfile is only NULL for the exec file. */
875 if (vp
->objfile
== NULL
)
878 /* relocate symbol table(s). */
881 /* Announce new object files. Doing this after symbol relocation
882 makes aix-thread.c's job easier. */
884 observer_notify_new_objfile (vp
->objfile
);
886 /* There may be more, so we don't break out of the loop. */
889 /* if there was no matching *vp, we must perforce create the sucker(s) */
890 if (!got_one
&& !retried
)
897 while ((next
= LDI_NEXT (ldi
, arch64
))
898 && (ldi
= (void *) (next
+ (char *) ldi
)));
900 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
901 is unlikely that the symbol file is relocated to the proper
902 address. And we might have attached to a process which is
903 running a different copy of the same executable. */
904 if (symfile_objfile
!= NULL
&& !got_exec_file
)
906 warning (_("Symbol file %s\nis not mapped; discarding it.\n\
907 If in fact that file has symbols which the mapped files listed by\n\
908 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
909 \"add-symbol-file\" commands (note that you must take care of relocating\n\
910 symbols to the proper address)."),
911 symfile_objfile
->name
);
912 free_objfile (symfile_objfile
);
913 symfile_objfile
= NULL
;
915 breakpoint_re_set ();
918 /* As well as symbol tables, exec_sections need relocation. After
919 the inferior process' termination, there will be a relocated symbol
920 table exist with no corresponding inferior process. At that time, we
921 need to use `exec' bfd, rather than the inferior process's memory space
924 `exec_sections' need to be relocated only once, as long as the exec
925 file remains unchanged.
934 if (execbfd
== exec_bfd
)
939 if (!vmap
|| !exec_ops
.to_sections
)
940 error (_("vmap_exec: vmap or exec_ops.to_sections == 0."));
942 for (i
= 0; &exec_ops
.to_sections
[i
] < exec_ops
.to_sections_end
; i
++)
944 if (strcmp (".text", exec_ops
.to_sections
[i
].the_bfd_section
->name
) == 0)
946 exec_ops
.to_sections
[i
].addr
+= vmap
->tstart
- vmap
->tvma
;
947 exec_ops
.to_sections
[i
].endaddr
+= vmap
->tstart
- vmap
->tvma
;
949 else if (strcmp (".data",
950 exec_ops
.to_sections
[i
].the_bfd_section
->name
) == 0)
952 exec_ops
.to_sections
[i
].addr
+= vmap
->dstart
- vmap
->dvma
;
953 exec_ops
.to_sections
[i
].endaddr
+= vmap
->dstart
- vmap
->dvma
;
955 else if (strcmp (".bss",
956 exec_ops
.to_sections
[i
].the_bfd_section
->name
) == 0)
958 exec_ops
.to_sections
[i
].addr
+= vmap
->dstart
- vmap
->dvma
;
959 exec_ops
.to_sections
[i
].endaddr
+= vmap
->dstart
- vmap
->dvma
;
964 /* Set the current architecture from the host running GDB. Called when
965 starting a child process. */
967 static void (*super_create_inferior
) (struct target_ops
*,char *exec_file
,
968 char *allargs
, char **env
, int from_tty
);
970 rs6000_create_inferior (struct target_ops
* ops
, char *exec_file
,
971 char *allargs
, char **env
, int from_tty
)
973 enum bfd_architecture arch
;
976 struct gdbarch_info info
;
978 super_create_inferior (ops
, exec_file
, allargs
, env
, from_tty
);
982 arch
= bfd_arch_rs6000
;
983 mach
= bfd_mach_rs6k
;
987 arch
= bfd_arch_powerpc
;
991 /* FIXME: schauer/2002-02-25:
992 We don't know if we are executing a 32 or 64 bit executable,
993 and have no way to pass the proper word size to rs6000_gdbarch_init.
994 So we have to avoid switching to a new architecture, if the architecture
996 Blindly calling rs6000_gdbarch_init used to work in older versions of
997 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
998 determine the wordsize. */
1001 const struct bfd_arch_info
*exec_bfd_arch_info
;
1003 exec_bfd_arch_info
= bfd_get_arch_info (exec_bfd
);
1004 if (arch
== exec_bfd_arch_info
->arch
)
1008 bfd_default_set_arch_mach (&abfd
, arch
, mach
);
1010 gdbarch_info_init (&info
);
1011 info
.bfd_arch_info
= bfd_get_arch_info (&abfd
);
1012 info
.abfd
= exec_bfd
;
1014 if (!gdbarch_update_p (info
))
1015 internal_error (__FILE__
, __LINE__
,
1016 _("rs6000_create_inferior: failed to select architecture"));
1020 /* xcoff_relocate_symtab - hook for symbol table relocation.
1022 This is only applicable to live processes, and is a no-op when
1023 debugging a core file. */
1026 xcoff_relocate_symtab (unsigned int pid
)
1028 int load_segs
= 64; /* number of load segments */
1031 int arch64
= ARCH64 ();
1032 int ldisize
= arch64
? sizeof (ldi
->l64
) : sizeof (ldi
->l32
);
1035 if (ptid_equal (inferior_ptid
, null_ptid
))
1040 size
= load_segs
* ldisize
;
1041 ldi
= (void *) xrealloc (ldi
, size
);
1044 /* According to my humble theory, AIX has some timing problems and
1045 when the user stack grows, kernel doesn't update stack info in time
1046 and ptrace calls step on user stack. That is why we sleep here a
1047 little, and give kernel to update its internals. */
1052 rc
= rs6000_ptrace64 (PT_LDINFO
, pid
, (unsigned long) ldi
, size
, NULL
);
1054 rc
= rs6000_ptrace32 (PT_LDINFO
, pid
, (int *) ldi
, size
, NULL
);
1058 if (errno
== ENOMEM
)
1061 perror_with_name (_("ptrace ldinfo"));
1066 vmap_exec (); /* relocate the exec and core sections as well. */
1073 /* Core file stuff. */
1075 /* Relocate symtabs and read in shared library info, based on symbols
1076 from the core file. */
1079 xcoff_relocate_core (struct target_ops
*target
)
1081 struct bfd_section
*ldinfo_sec
;
1085 int arch64
= ARCH64 ();
1087 /* Size of a struct ld_info except for the variable-length filename. */
1088 int nonfilesz
= (int)LDI_FILENAME ((LdInfo
*)0, arch64
);
1090 /* Allocated size of buffer. */
1091 int buffer_size
= nonfilesz
;
1092 char *buffer
= xmalloc (buffer_size
);
1093 struct cleanup
*old
= make_cleanup (free_current_contents
, &buffer
);
1095 ldinfo_sec
= bfd_get_section_by_name (core_bfd
, ".ldinfo");
1096 if (ldinfo_sec
== NULL
)
1099 fprintf_filtered (gdb_stderr
, "Couldn't get ldinfo from core file: %s\n",
1100 bfd_errmsg (bfd_get_error ()));
1107 int names_found
= 0;
1109 /* Read in everything but the name. */
1110 if (bfd_get_section_contents (core_bfd
, ldinfo_sec
, buffer
,
1111 offset
, nonfilesz
) == 0)
1118 if (i
== buffer_size
)
1121 buffer
= xrealloc (buffer
, buffer_size
);
1123 if (bfd_get_section_contents (core_bfd
, ldinfo_sec
, &buffer
[i
],
1124 offset
+ i
, 1) == 0)
1126 if (buffer
[i
++] == '\0')
1129 while (names_found
< 2);
1131 ldi
= (LdInfo
*) buffer
;
1133 /* Can't use a file descriptor from the core file; need to open it. */
1135 ldi
->l64
.ldinfo_fd
= -1;
1137 ldi
->l32
.ldinfo_fd
= -1;
1139 /* The first ldinfo is for the exec file, allocated elsewhere. */
1140 if (offset
== 0 && vmap
!= NULL
)
1143 vp
= add_vmap (ldi
);
1145 /* Process next shared library upon error. */
1146 offset
+= LDI_NEXT (ldi
, arch64
);
1150 vmap_secs (vp
, ldi
, arch64
);
1152 /* Unless this is the exec file,
1153 add our sections to the section table for the core target. */
1156 struct section_table
*stp
;
1158 target_resize_to_sections (target
, 2);
1159 stp
= target
->to_sections_end
- 2;
1162 stp
->the_bfd_section
= bfd_get_section_by_name (stp
->bfd
, ".text");
1163 stp
->addr
= vp
->tstart
;
1164 stp
->endaddr
= vp
->tend
;
1168 stp
->the_bfd_section
= bfd_get_section_by_name (stp
->bfd
, ".data");
1169 stp
->addr
= vp
->dstart
;
1170 stp
->endaddr
= vp
->dend
;
1175 if (vp
!= vmap
&& vp
->objfile
)
1176 observer_notify_new_objfile (vp
->objfile
);
1178 while (LDI_NEXT (ldi
, arch64
) != 0);
1180 breakpoint_re_set ();
1184 /* Under AIX, we have to pass the correct TOC pointer to a function
1185 when calling functions in the inferior.
1186 We try to find the relative toc offset of the objfile containing PC
1187 and add the current load address of the data segment from the vmap. */
1190 find_toc_address (CORE_ADDR pc
)
1193 extern CORE_ADDR
get_toc_offset (struct objfile
*); /* xcoffread.c */
1195 for (vp
= vmap
; vp
; vp
= vp
->nxt
)
1197 if (pc
>= vp
->tstart
&& pc
< vp
->tend
)
1199 /* vp->objfile is only NULL for the exec file. */
1200 return vp
->dstart
+ get_toc_offset (vp
->objfile
== NULL
1205 error (_("Unable to find TOC entry for pc %s."), hex_string (pc
));
1210 _initialize_rs6000_nat (void)
1212 struct target_ops
*t
;
1214 t
= inf_ptrace_target ();
1215 t
->to_fetch_registers
= rs6000_fetch_inferior_registers
;
1216 t
->to_store_registers
= rs6000_store_inferior_registers
;
1217 t
->to_xfer_partial
= rs6000_xfer_partial
;
1219 super_create_inferior
= t
->to_create_inferior
;
1220 t
->to_create_inferior
= rs6000_create_inferior
;
1222 t
->to_wait
= rs6000_wait
;
1226 /* Initialize hook in rs6000-tdep.c for determining the TOC address
1227 when calling functions in the inferior. */
1228 rs6000_find_toc_address_hook
= find_toc_address
;