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
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;
532 pid = waitpid (ptid_get_pid (ptid), &status, 0);
535 while (pid == -1 && errno == EINTR);
538 clear_sigint_trap ();
542 fprintf_unfiltered (gdb_stderr,
543 _("Child process unexpectedly missing: %s.\n"),
544 safe_strerror (save_errno));
546 /* Claim it exited with unknown signal. */
547 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
548 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
549 return minus_one_ptid;
552 /* Ignore terminated detached child processes. */
553 if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
558 /* AIX has a couple of strange returns from wait(). */
560 /* stop after load" status. */
562 ourstatus->kind = TARGET_WAITKIND_LOADED;
563 /* signal 0. I have no idea why wait(2) returns with this status word. */
564 else if (status == 0x7f)
565 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
566 /* A normal waitstatus. Let the usual macros deal with it. */
568 store_waitstatus (ourstatus, status);
570 return pid_to_ptid (pid);
573 /* Execute one dummy breakpoint instruction. This way we give the kernel
574 a chance to do some housekeeping and update inferior's internal data,
578 exec_one_dummy_insn (struct gdbarch *gdbarch)
580 #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200
582 int ret, status, pid;
586 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
587 assume that this address will never be executed again by the real
590 bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR);
592 /* You might think this could be done with a single ptrace call, and
593 you'd be correct for just about every platform I've ever worked
594 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
595 the inferior never hits the breakpoint (it's also worth noting
596 powerpc-ibm-aix4.1.3 works correctly). */
597 prev_pc = read_pc ();
598 write_pc (DUMMY_INSN_ADDR);
600 ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
602 ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL);
605 perror ("pt_continue");
609 pid = wait (&status);
611 while (pid != PIDGET (inferior_ptid));
614 deprecated_remove_raw_breakpoint (bp);
618 /* Copy information about text and data sections from LDI to VP for a 64-bit
619 process if ARCH64 and for a 32-bit process otherwise. */
622 vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
626 vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
627 vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
628 vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
629 vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
633 vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
634 vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
635 vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
636 vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
639 /* The run time loader maps the file header in addition to the text
640 section and returns a pointer to the header in ldinfo_textorg.
641 Adjust the text start address to point to the real start address
642 of the text section. */
643 vp->tstart += vp->toffs;
646 /* handle symbol translation on vmapping */
649 vmap_symtab (struct vmap *vp)
651 struct objfile *objfile;
652 struct section_offsets *new_offsets;
655 objfile = vp->objfile;
658 /* OK, it's not an objfile we opened ourselves.
659 Currently, that can only happen with the exec file, so
660 relocate the symbols for the symfile. */
661 if (symfile_objfile == NULL)
663 objfile = symfile_objfile;
665 else if (!vp->loaded)
666 /* If symbols are not yet loaded, offsets are not yet valid. */
670 (struct section_offsets *)
671 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
673 for (i = 0; i < objfile->num_sections; ++i)
674 new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
676 /* The symbols in the object file are linked to the VMA of the section,
677 relocate them VMA relative. */
678 new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
679 new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
680 new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
682 objfile_relocate (objfile, new_offsets);
685 /* Add symbols for an objfile. */
688 objfile_symbol_add (void *arg)
690 struct objfile *obj = (struct objfile *) arg;
692 syms_from_objfile (obj, NULL, 0, 0, 0, 0);
693 new_symfile_objfile (obj, 0, 0);
697 /* Add symbols for a vmap. Return zero upon error. */
700 vmap_add_symbols (struct vmap *vp)
702 if (catch_errors (objfile_symbol_add, vp->objfile,
703 "Error while reading shared library symbols:\n",
706 /* Note this is only done if symbol reading was successful. */
714 /* Add a new vmap entry based on ldinfo() information.
716 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
717 core file), the caller should set it to -1, and we will open the file.
719 Return the vmap new entry. */
722 add_vmap (LdInfo *ldi)
725 char *mem, *objname, *filename;
729 ARCH64_DECL (arch64);
731 /* This ldi structure was allocated using alloca() in
732 xcoff_relocate_symtab(). Now we need to have persistent object
733 and member names, so we should save them. */
735 filename = LDI_FILENAME (ldi, arch64);
736 mem = filename + strlen (filename) + 1;
737 mem = savestring (mem, strlen (mem));
738 objname = savestring (filename, strlen (filename));
740 fd = LDI_FD (ldi, arch64);
742 /* Note that this opens it once for every member; a possible
743 enhancement would be to only open it once for every object. */
744 abfd = bfd_openr (objname, gnutarget);
746 abfd = bfd_fdopenr (objname, gnutarget, fd);
749 warning (_("Could not open `%s' as an executable file: %s"),
750 objname, bfd_errmsg (bfd_get_error ()));
754 /* make sure we have an object file */
756 if (bfd_check_format (abfd, bfd_object))
757 vp = map_vmap (abfd, 0);
759 else if (bfd_check_format (abfd, bfd_archive))
762 /* FIXME??? am I tossing BFDs? bfd? */
763 while ((last = bfd_openr_next_archived_file (abfd, last)))
764 if (strcmp (mem, last->filename) == 0)
769 warning (_("\"%s\": member \"%s\" missing."), objname, mem);
774 if (!bfd_check_format (last, bfd_object))
776 warning (_("\"%s\": member \"%s\" not in executable format: %s."),
777 objname, mem, bfd_errmsg (bfd_get_error ()));
783 vp = map_vmap (last, abfd);
787 warning (_("\"%s\": not in executable format: %s."),
788 objname, bfd_errmsg (bfd_get_error ()));
792 obj = allocate_objfile (vp->bfd, 0);
795 /* Always add symbols for the main objfile. */
796 if (vp == vmap || auto_solib_add)
797 vmap_add_symbols (vp);
801 /* update VMAP info with ldinfo() information
802 Input is ptr to ldinfo() results. */
805 vmap_ldinfo (LdInfo *ldi)
809 int got_one, retried;
810 int got_exec_file = 0;
812 int arch64 = ARCH64 ();
814 /* For each *ldi, see if we have a corresponding *vp.
815 If so, update the mapping, and symbol table.
816 If not, add an entry and symbol table. */
820 char *name = LDI_FILENAME (ldi, arch64);
821 char *memb = name + strlen (name) + 1;
822 int fd = LDI_FD (ldi, arch64);
826 if (fstat (fd, &ii) < 0)
828 /* The kernel sets ld_info to -1, if the process is still using the
829 object, and the object is removed. Keep the symbol info for the
830 removed object and issue a warning. */
831 warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
836 for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
838 struct objfile *objfile;
840 /* First try to find a `vp', which is the same as in ldinfo.
841 If not the same, just continue and grep the next `vp'. If same,
842 relocate its tstart, tend, dstart, dend values. If no such `vp'
843 found, get out of this for loop, add this ldi entry as a new vmap
844 (add_vmap) and come back, find its `vp' and so on... */
846 /* The filenames are not always sufficient to match on. */
848 if ((name[0] == '/' && strcmp (name, vp->name) != 0)
849 || (memb[0] && strcmp (memb, vp->member) != 0))
852 /* See if we are referring to the same file.
853 We have to check objfile->obfd, symfile.c:reread_symbols might
854 have updated the obfd after a change. */
855 objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
857 || objfile->obfd == NULL
858 || bfd_stat (objfile->obfd, &vi) < 0)
860 warning (_("Unable to stat %s, keeping its symbols"), name);
864 if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
872 /* Found a corresponding VMAP. Remap! */
874 vmap_secs (vp, ldi, arch64);
876 /* The objfile is only NULL for the exec file. */
877 if (vp->objfile == NULL)
880 /* relocate symbol table(s). */
883 /* Announce new object files. Doing this after symbol relocation
884 makes aix-thread.c's job easier. */
886 observer_notify_new_objfile (vp->objfile);
888 /* There may be more, so we don't break out of the loop. */
891 /* if there was no matching *vp, we must perforce create the sucker(s) */
892 if (!got_one && !retried)
899 while ((next = LDI_NEXT (ldi, arch64))
900 && (ldi = (void *) (next + (char *) ldi)));
902 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
903 is unlikely that the symbol file is relocated to the proper
904 address. And we might have attached to a process which is
905 running a different copy of the same executable. */
906 if (symfile_objfile != NULL && !got_exec_file)
908 warning (_("Symbol file %s\nis not mapped; discarding it.\n\
909 If in fact that file has symbols which the mapped files listed by\n\
910 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
911 \"add-symbol-file\" commands (note that you must take care of relocating\n\
912 symbols to the proper address)."),
913 symfile_objfile->name);
914 free_objfile (symfile_objfile);
915 symfile_objfile = NULL;
917 breakpoint_re_set ();
920 /* As well as symbol tables, exec_sections need relocation. After
921 the inferior process' termination, there will be a relocated symbol
922 table exist with no corresponding inferior process. At that time, we
923 need to use `exec' bfd, rather than the inferior process's memory space
926 `exec_sections' need to be relocated only once, as long as the exec
927 file remains unchanged.
936 if (execbfd == exec_bfd)
941 if (!vmap || !exec_ops.to_sections)
942 error (_("vmap_exec: vmap or exec_ops.to_sections == 0."));
944 for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
946 if (strcmp (".text", exec_ops.to_sections[i].the_bfd_section->name) == 0)
948 exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
949 exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
951 else if (strcmp (".data",
952 exec_ops.to_sections[i].the_bfd_section->name) == 0)
954 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
955 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
957 else if (strcmp (".bss",
958 exec_ops.to_sections[i].the_bfd_section->name) == 0)
960 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
961 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
966 /* Set the current architecture from the host running GDB. Called when
967 starting a child process. */
969 static void (*super_create_inferior) (char *exec_file, char *allargs,
970 char **env, int from_tty);
972 rs6000_create_inferior (char *exec_file, char *allargs, char **env, int from_tty)
974 enum bfd_architecture arch;
977 struct gdbarch_info info;
979 super_create_inferior (exec_file, allargs, env, from_tty);
983 arch = bfd_arch_rs6000;
984 mach = bfd_mach_rs6k;
988 arch = bfd_arch_powerpc;
992 /* FIXME: schauer/2002-02-25:
993 We don't know if we are executing a 32 or 64 bit executable,
994 and have no way to pass the proper word size to rs6000_gdbarch_init.
995 So we have to avoid switching to a new architecture, if the architecture
997 Blindly calling rs6000_gdbarch_init used to work in older versions of
998 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
999 determine the wordsize. */
1002 const struct bfd_arch_info *exec_bfd_arch_info;
1004 exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
1005 if (arch == exec_bfd_arch_info->arch)
1009 bfd_default_set_arch_mach (&abfd, arch, mach);
1011 gdbarch_info_init (&info);
1012 info.bfd_arch_info = bfd_get_arch_info (&abfd);
1013 info.abfd = exec_bfd;
1015 if (!gdbarch_update_p (info))
1016 internal_error (__FILE__, __LINE__,
1017 _("rs6000_create_inferior: failed to select architecture"));
1021 /* xcoff_relocate_symtab - hook for symbol table relocation.
1023 This is only applicable to live processes, and is a no-op when
1024 debugging a core file. */
1027 xcoff_relocate_symtab (unsigned int pid)
1029 int load_segs = 64; /* number of load segments */
1032 int arch64 = ARCH64 ();
1033 int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
1036 if (ptid_equal (inferior_ptid, null_ptid))
1041 size = load_segs * ldisize;
1042 ldi = (void *) xrealloc (ldi, size);
1045 /* According to my humble theory, AIX has some timing problems and
1046 when the user stack grows, kernel doesn't update stack info in time
1047 and ptrace calls step on user stack. That is why we sleep here a
1048 little, and give kernel to update its internals. */
1053 rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
1055 rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
1059 if (errno == ENOMEM)
1062 perror_with_name (_("ptrace ldinfo"));
1067 vmap_exec (); /* relocate the exec and core sections as well. */
1074 /* Core file stuff. */
1076 /* Relocate symtabs and read in shared library info, based on symbols
1077 from the core file. */
1080 xcoff_relocate_core (struct target_ops *target)
1082 struct bfd_section *ldinfo_sec;
1086 int arch64 = ARCH64 ();
1088 /* Size of a struct ld_info except for the variable-length filename. */
1089 int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
1091 /* Allocated size of buffer. */
1092 int buffer_size = nonfilesz;
1093 char *buffer = xmalloc (buffer_size);
1094 struct cleanup *old = make_cleanup (free_current_contents, &buffer);
1096 ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
1097 if (ldinfo_sec == NULL)
1100 fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
1101 bfd_errmsg (bfd_get_error ()));
1108 int names_found = 0;
1110 /* Read in everything but the name. */
1111 if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
1112 offset, nonfilesz) == 0)
1119 if (i == buffer_size)
1122 buffer = xrealloc (buffer, buffer_size);
1124 if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
1125 offset + i, 1) == 0)
1127 if (buffer[i++] == '\0')
1130 while (names_found < 2);
1132 ldi = (LdInfo *) buffer;
1134 /* Can't use a file descriptor from the core file; need to open it. */
1136 ldi->l64.ldinfo_fd = -1;
1138 ldi->l32.ldinfo_fd = -1;
1140 /* The first ldinfo is for the exec file, allocated elsewhere. */
1141 if (offset == 0 && vmap != NULL)
1144 vp = add_vmap (ldi);
1146 /* Process next shared library upon error. */
1147 offset += LDI_NEXT (ldi, arch64);
1151 vmap_secs (vp, ldi, arch64);
1153 /* Unless this is the exec file,
1154 add our sections to the section table for the core target. */
1157 struct section_table *stp;
1159 target_resize_to_sections (target, 2);
1160 stp = target->to_sections_end - 2;
1163 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
1164 stp->addr = vp->tstart;
1165 stp->endaddr = vp->tend;
1169 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
1170 stp->addr = vp->dstart;
1171 stp->endaddr = vp->dend;
1176 if (vp != vmap && vp->objfile)
1177 observer_notify_new_objfile (vp->objfile);
1179 while (LDI_NEXT (ldi, arch64) != 0);
1181 breakpoint_re_set ();
1185 /* Under AIX, we have to pass the correct TOC pointer to a function
1186 when calling functions in the inferior.
1187 We try to find the relative toc offset of the objfile containing PC
1188 and add the current load address of the data segment from the vmap. */
1191 find_toc_address (CORE_ADDR pc)
1194 extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */
1196 for (vp = vmap; vp; vp = vp->nxt)
1198 if (pc >= vp->tstart && pc < vp->tend)
1200 /* vp->objfile is only NULL for the exec file. */
1201 return vp->dstart + get_toc_offset (vp->objfile == NULL
1206 error (_("Unable to find TOC entry for pc %s."), hex_string (pc));
1211 _initialize_rs6000_nat (void)
1213 struct target_ops *t;
1215 t = inf_ptrace_target ();
1216 t->to_fetch_registers = rs6000_fetch_inferior_registers;
1217 t->to_store_registers = rs6000_store_inferior_registers;
1218 t->to_xfer_partial = rs6000_xfer_partial;
1220 super_create_inferior = t->to_create_inferior;
1221 t->to_create_inferior = rs6000_create_inferior;
1223 t->to_wait = rs6000_wait;
1227 /* Initialize hook in rs6000-tdep.c for determining the TOC address
1228 when calling functions in the inferior. */
1229 rs6000_find_toc_address_hook = find_toc_address;