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"
39 #include "gdb_stdint.h"
42 #include <sys/ptrace.h>
45 #include <sys/param.h>
49 #include <sys/ioctl.h>
57 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
58 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
60 #include <sys/systemcfg.h>
62 /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
63 debugging 32-bit and 64-bit processes. Define a typedef and macros for
64 accessing fields in the appropriate structures. */
66 /* In 32-bit compilation mode (which is the only mode from which ptrace()
67 works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
73 /* Return whether the current architecture is 64-bit. */
78 # define ARCH64() (register_size (current_gdbarch, 0) == 8)
81 /* Union of 32-bit and 64-bit versions of ld_info. */
88 struct __ld_info32 l32;
89 struct __ld_info64 l64;
93 /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
94 declare and initialize a variable named VAR suitable for use as the arch64
95 parameter to the various LDI_*() macros. */
98 # define ARCH64_DECL(var)
100 # define ARCH64_DECL(var) int var = ARCH64 ()
103 /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
104 otherwise. This technique only works for FIELDs with the same data type in
105 32-bit and 64-bit versions of ld_info. */
108 # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
110 # define LDI_FIELD(ldi, arch64, field) \
111 (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
114 /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
115 process otherwise. */
117 #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
118 #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
119 #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
121 extern struct vmap *map_vmap (bfd * bf, bfd * arch);
123 static void vmap_exec (void);
125 static void vmap_ldinfo (LdInfo *);
127 static struct vmap *add_vmap (LdInfo *);
129 static int objfile_symbol_add (void *);
131 static void vmap_symtab (struct vmap *);
133 static void exec_one_dummy_insn (void);
135 extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta);
137 /* Given REGNO, a gdb register number, return the corresponding
138 number suitable for use as a ptrace() parameter. Return -1 if
139 there's no suitable mapping. Also, set the int pointed to by
140 ISFLOAT to indicate whether REGNO is a floating point register. */
143 regmap (int regno, int *isfloat)
145 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
148 if (tdep->ppc_gp0_regnum <= regno
149 && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
151 else if (tdep->ppc_fp0_regnum >= 0
152 && tdep->ppc_fp0_regnum <= regno
153 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
156 return regno - tdep->ppc_fp0_regnum + FPR0;
158 else if (regno == gdbarch_pc_regnum (current_gdbarch))
160 else if (regno == tdep->ppc_ps_regnum)
162 else if (regno == tdep->ppc_cr_regnum)
164 else if (regno == tdep->ppc_lr_regnum)
166 else if (regno == tdep->ppc_ctr_regnum)
168 else if (regno == tdep->ppc_xer_regnum)
170 else if (tdep->ppc_fpscr_regnum >= 0
171 && regno == tdep->ppc_fpscr_regnum)
173 else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum)
179 /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
182 rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
184 int ret = ptrace (req, id, (int *)addr, data, buf);
186 printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
187 req, id, (unsigned int)addr, data, (unsigned int)buf, ret);
192 /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
195 rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf)
198 int ret = ptracex (req, id, addr, data, buf);
203 printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
204 req, id, addr, data, (unsigned int)buf, ret);
209 /* Fetch register REGNO from the inferior. */
212 fetch_register (struct regcache *regcache, int regno)
214 struct gdbarch *gdbarch = get_regcache_arch (regcache);
215 int addr[MAX_REGISTER_SIZE];
218 /* Retrieved values may be -1, so infer errors from errno. */
221 nr = regmap (regno, &isfloat);
223 /* Floating-point registers. */
225 rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0);
227 /* Bogus register number. */
230 if (regno >= gdbarch_num_regs (gdbarch))
231 fprintf_unfiltered (gdb_stderr,
232 "gdb error: register no %d not implemented.\n",
237 /* Fixed-point registers. */
241 *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0);
244 /* PT_READ_GPR requires the buffer parameter to point to long long,
245 even if the register is really only 32 bits. */
247 rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
248 if (register_size (gdbarch, regno) == 8)
249 memcpy (addr, &buf, 8);
256 regcache_raw_supply (regcache, regno, (char *) addr);
260 /* FIXME: this happens 3 times at the start of each 64-bit program. */
261 perror ("ptrace read");
267 /* Store register REGNO back into the inferior. */
270 store_register (const struct regcache *regcache, int regno)
272 struct gdbarch *gdbarch = get_regcache_arch (regcache);
273 int addr[MAX_REGISTER_SIZE];
276 /* Fetch the register's value from the register cache. */
277 regcache_raw_collect (regcache, regno, addr);
279 /* -1 can be a successful return value, so infer errors from errno. */
282 nr = regmap (regno, &isfloat);
284 /* Floating-point registers. */
286 rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0);
288 /* Bogus register number. */
291 if (regno >= gdbarch_num_regs (gdbarch))
292 fprintf_unfiltered (gdb_stderr,
293 "gdb error: register no %d not implemented.\n",
297 /* Fixed-point registers. */
300 if (regno == gdbarch_sp_regnum (gdbarch))
301 /* Execute one dummy instruction (which is a breakpoint) in inferior
302 process to give kernel a chance to do internal housekeeping.
303 Otherwise the following ptrace(2) calls will mess up user stack
304 since kernel will get confused about the bottom of the stack
306 exec_one_dummy_insn ();
308 /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors,
309 the register's value is passed by value, but for 64-bit inferiors,
310 the address of a buffer containing the value is passed. */
312 rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0);
315 /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
316 area, even if the register is really only 32 bits. */
318 if (register_size (gdbarch, regno) == 8)
319 memcpy (&buf, addr, 8);
322 rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
328 perror ("ptrace write");
333 /* Read from the inferior all registers if REGNO == -1 and just register
337 rs6000_fetch_inferior_registers (struct regcache *regcache, int regno)
339 struct gdbarch *gdbarch = get_regcache_arch (regcache);
341 fetch_register (regcache, regno);
345 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
347 /* Read 32 general purpose registers. */
348 for (regno = tdep->ppc_gp0_regnum;
349 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
352 fetch_register (regcache, regno);
355 /* Read general purpose floating point registers. */
356 if (tdep->ppc_fp0_regnum >= 0)
357 for (regno = 0; regno < ppc_num_fprs; regno++)
358 fetch_register (regcache, tdep->ppc_fp0_regnum + regno);
360 /* Read special registers. */
361 fetch_register (regcache, gdbarch_pc_regnum (gdbarch));
362 fetch_register (regcache, tdep->ppc_ps_regnum);
363 fetch_register (regcache, tdep->ppc_cr_regnum);
364 fetch_register (regcache, tdep->ppc_lr_regnum);
365 fetch_register (regcache, tdep->ppc_ctr_regnum);
366 fetch_register (regcache, tdep->ppc_xer_regnum);
367 if (tdep->ppc_fpscr_regnum >= 0)
368 fetch_register (regcache, tdep->ppc_fpscr_regnum);
369 if (tdep->ppc_mq_regnum >= 0)
370 fetch_register (regcache, tdep->ppc_mq_regnum);
374 /* Store our register values back into the inferior.
375 If REGNO is -1, do this for all registers.
376 Otherwise, REGNO specifies which register (so we can save time). */
379 rs6000_store_inferior_registers (struct regcache *regcache, int regno)
381 struct gdbarch *gdbarch = get_regcache_arch (regcache);
383 store_register (regcache, regno);
387 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
389 /* Write general purpose registers first. */
390 for (regno = tdep->ppc_gp0_regnum;
391 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
394 store_register (regcache, regno);
397 /* Write floating point registers. */
398 if (tdep->ppc_fp0_regnum >= 0)
399 for (regno = 0; regno < ppc_num_fprs; regno++)
400 store_register (regcache, tdep->ppc_fp0_regnum + regno);
402 /* Write special registers. */
403 store_register (regcache, gdbarch_pc_regnum (gdbarch));
404 store_register (regcache, tdep->ppc_ps_regnum);
405 store_register (regcache, tdep->ppc_cr_regnum);
406 store_register (regcache, tdep->ppc_lr_regnum);
407 store_register (regcache, tdep->ppc_ctr_regnum);
408 store_register (regcache, tdep->ppc_xer_regnum);
409 if (tdep->ppc_fpscr_regnum >= 0)
410 store_register (regcache, tdep->ppc_fpscr_regnum);
411 if (tdep->ppc_mq_regnum >= 0)
412 store_register (regcache, tdep->ppc_mq_regnum);
417 /* Attempt a transfer all LEN bytes starting at OFFSET between the
418 inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
419 Return the number of bytes actually transferred. */
422 rs6000_xfer_partial (struct target_ops *ops, enum target_object object,
423 const char *annex, gdb_byte *readbuf,
424 const gdb_byte *writebuf,
425 ULONGEST offset, LONGEST len)
427 pid_t pid = ptid_get_pid (inferior_ptid);
428 int arch64 = ARCH64 ();
432 case TARGET_OBJECT_MEMORY:
436 PTRACE_TYPE_RET word;
437 gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
439 ULONGEST rounded_offset;
442 /* Round the start offset down to the next long word
444 rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
446 /* Since ptrace will transfer a single word starting at that
447 rounded_offset the partial_len needs to be adjusted down to
448 that (remember this function only does a single transfer).
449 Should the required length be even less, adjust it down
451 partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
452 if (partial_len > len)
457 /* If OFFSET:PARTIAL_LEN is smaller than
458 ROUNDED_OFFSET:WORDSIZE then a read/modify write will
459 be needed. Read in the entire word. */
460 if (rounded_offset < offset
461 || (offset + partial_len
462 < rounded_offset + sizeof (PTRACE_TYPE_RET)))
464 /* Need part of initial word -- fetch it. */
466 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
467 rounded_offset, 0, NULL);
469 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
470 (int *)(uintptr_t)rounded_offset,
474 /* Copy data to be written over corresponding part of
476 memcpy (buffer.byte + (offset - rounded_offset),
477 writebuf, partial_len);
481 rs6000_ptrace64 (PT_WRITE_D, pid,
482 rounded_offset, buffer.word, NULL);
484 rs6000_ptrace32 (PT_WRITE_D, pid,
485 (int *)(uintptr_t)rounded_offset, buffer.word, NULL);
494 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
495 rounded_offset, 0, NULL);
497 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
498 (int *)(uintptr_t)rounded_offset,
503 /* Copy appropriate bytes out of the buffer. */
504 memcpy (readbuf, buffer.byte + (offset - rounded_offset),
516 /* Wait for the child specified by PTID to do something. Return the
517 process ID of the child, or MINUS_ONE_PTID in case of error; store
518 the status in *OURSTATUS. */
521 rs6000_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
524 int status, save_errno;
533 pid = waitpid (ptid_get_pid (ptid), &status, 0);
536 while (pid == -1 && errno == EINTR);
539 clear_sigint_trap ();
543 fprintf_unfiltered (gdb_stderr,
544 _("Child process unexpectedly missing: %s.\n"),
545 safe_strerror (save_errno));
547 /* Claim it exited with unknown signal. */
548 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
549 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
550 return minus_one_ptid;
553 /* Ignore terminated detached child processes. */
554 if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
559 /* AIX has a couple of strange returns from wait(). */
561 /* stop after load" status. */
563 ourstatus->kind = TARGET_WAITKIND_LOADED;
564 /* signal 0. I have no idea why wait(2) returns with this status word. */
565 else if (status == 0x7f)
566 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
567 /* A normal waitstatus. Let the usual macros deal with it. */
569 store_waitstatus (ourstatus, status);
571 return pid_to_ptid (pid);
574 /* Execute one dummy breakpoint instruction. This way we give the kernel
575 a chance to do some housekeeping and update inferior's internal data,
579 exec_one_dummy_insn (void)
581 #define DUMMY_INSN_ADDR gdbarch_tdep (current_gdbarch)->text_segment_base+0x200
583 int ret, status, pid;
587 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
588 assume that this address will never be executed again by the real
591 bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR);
593 /* You might think this could be done with a single ptrace call, and
594 you'd be correct for just about every platform I've ever worked
595 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
596 the inferior never hits the breakpoint (it's also worth noting
597 powerpc-ibm-aix4.1.3 works correctly). */
598 prev_pc = read_pc ();
599 write_pc (DUMMY_INSN_ADDR);
601 ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
603 ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL);
606 perror ("pt_continue");
610 pid = wait (&status);
612 while (pid != PIDGET (inferior_ptid));
615 deprecated_remove_raw_breakpoint (bp);
619 /* Copy information about text and data sections from LDI to VP for a 64-bit
620 process if ARCH64 and for a 32-bit process otherwise. */
623 vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
627 vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
628 vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
629 vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
630 vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
634 vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
635 vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
636 vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
637 vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
640 /* The run time loader maps the file header in addition to the text
641 section and returns a pointer to the header in ldinfo_textorg.
642 Adjust the text start address to point to the real start address
643 of the text section. */
644 vp->tstart += vp->toffs;
647 /* handle symbol translation on vmapping */
650 vmap_symtab (struct vmap *vp)
652 struct objfile *objfile;
653 struct section_offsets *new_offsets;
656 objfile = vp->objfile;
659 /* OK, it's not an objfile we opened ourselves.
660 Currently, that can only happen with the exec file, so
661 relocate the symbols for the symfile. */
662 if (symfile_objfile == NULL)
664 objfile = symfile_objfile;
666 else if (!vp->loaded)
667 /* If symbols are not yet loaded, offsets are not yet valid. */
671 (struct section_offsets *)
672 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
674 for (i = 0; i < objfile->num_sections; ++i)
675 new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
677 /* The symbols in the object file are linked to the VMA of the section,
678 relocate them VMA relative. */
679 new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
680 new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
681 new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
683 objfile_relocate (objfile, new_offsets);
686 /* Add symbols for an objfile. */
689 objfile_symbol_add (void *arg)
691 struct objfile *obj = (struct objfile *) arg;
693 syms_from_objfile (obj, NULL, 0, 0, 0, 0);
694 new_symfile_objfile (obj, 0, 0);
698 /* Add symbols for a vmap. Return zero upon error. */
701 vmap_add_symbols (struct vmap *vp)
703 if (catch_errors (objfile_symbol_add, vp->objfile,
704 "Error while reading shared library symbols:\n",
707 /* Note this is only done if symbol reading was successful. */
715 /* Add a new vmap entry based on ldinfo() information.
717 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
718 core file), the caller should set it to -1, and we will open the file.
720 Return the vmap new entry. */
723 add_vmap (LdInfo *ldi)
726 char *mem, *objname, *filename;
730 ARCH64_DECL (arch64);
732 /* This ldi structure was allocated using alloca() in
733 xcoff_relocate_symtab(). Now we need to have persistent object
734 and member names, so we should save them. */
736 filename = LDI_FILENAME (ldi, arch64);
737 mem = filename + strlen (filename) + 1;
738 mem = savestring (mem, strlen (mem));
739 objname = savestring (filename, strlen (filename));
741 fd = LDI_FD (ldi, arch64);
743 /* Note that this opens it once for every member; a possible
744 enhancement would be to only open it once for every object. */
745 abfd = bfd_openr (objname, gnutarget);
747 abfd = bfd_fdopenr (objname, gnutarget, fd);
750 warning (_("Could not open `%s' as an executable file: %s"),
751 objname, bfd_errmsg (bfd_get_error ()));
755 /* make sure we have an object file */
757 if (bfd_check_format (abfd, bfd_object))
758 vp = map_vmap (abfd, 0);
760 else if (bfd_check_format (abfd, bfd_archive))
763 /* FIXME??? am I tossing BFDs? bfd? */
764 while ((last = bfd_openr_next_archived_file (abfd, last)))
765 if (strcmp (mem, last->filename) == 0)
770 warning (_("\"%s\": member \"%s\" missing."), objname, mem);
775 if (!bfd_check_format (last, bfd_object))
777 warning (_("\"%s\": member \"%s\" not in executable format: %s."),
778 objname, mem, bfd_errmsg (bfd_get_error ()));
784 vp = map_vmap (last, abfd);
788 warning (_("\"%s\": not in executable format: %s."),
789 objname, bfd_errmsg (bfd_get_error ()));
793 obj = allocate_objfile (vp->bfd, 0);
796 /* Always add symbols for the main objfile. */
797 if (vp == vmap || auto_solib_add)
798 vmap_add_symbols (vp);
802 /* update VMAP info with ldinfo() information
803 Input is ptr to ldinfo() results. */
806 vmap_ldinfo (LdInfo *ldi)
810 int got_one, retried;
811 int got_exec_file = 0;
813 int arch64 = ARCH64 ();
815 /* For each *ldi, see if we have a corresponding *vp.
816 If so, update the mapping, and symbol table.
817 If not, add an entry and symbol table. */
821 char *name = LDI_FILENAME (ldi, arch64);
822 char *memb = name + strlen (name) + 1;
823 int fd = LDI_FD (ldi, arch64);
827 if (fstat (fd, &ii) < 0)
829 /* The kernel sets ld_info to -1, if the process is still using the
830 object, and the object is removed. Keep the symbol info for the
831 removed object and issue a warning. */
832 warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
837 for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
839 struct objfile *objfile;
841 /* First try to find a `vp', which is the same as in ldinfo.
842 If not the same, just continue and grep the next `vp'. If same,
843 relocate its tstart, tend, dstart, dend values. If no such `vp'
844 found, get out of this for loop, add this ldi entry as a new vmap
845 (add_vmap) and come back, find its `vp' and so on... */
847 /* The filenames are not always sufficient to match on. */
849 if ((name[0] == '/' && strcmp (name, vp->name) != 0)
850 || (memb[0] && strcmp (memb, vp->member) != 0))
853 /* See if we are referring to the same file.
854 We have to check objfile->obfd, symfile.c:reread_symbols might
855 have updated the obfd after a change. */
856 objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
858 || objfile->obfd == NULL
859 || bfd_stat (objfile->obfd, &vi) < 0)
861 warning (_("Unable to stat %s, keeping its symbols"), name);
865 if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
873 /* Found a corresponding VMAP. Remap! */
875 vmap_secs (vp, ldi, arch64);
877 /* The objfile is only NULL for the exec file. */
878 if (vp->objfile == NULL)
881 /* relocate symbol table(s). */
884 /* Announce new object files. Doing this after symbol relocation
885 makes aix-thread.c's job easier. */
887 observer_notify_new_objfile (vp->objfile);
889 /* There may be more, so we don't break out of the loop. */
892 /* if there was no matching *vp, we must perforce create the sucker(s) */
893 if (!got_one && !retried)
900 while ((next = LDI_NEXT (ldi, arch64))
901 && (ldi = (void *) (next + (char *) ldi)));
903 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
904 is unlikely that the symbol file is relocated to the proper
905 address. And we might have attached to a process which is
906 running a different copy of the same executable. */
907 if (symfile_objfile != NULL && !got_exec_file)
909 warning (_("Symbol file %s\nis not mapped; discarding it.\n\
910 If in fact that file has symbols which the mapped files listed by\n\
911 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
912 \"add-symbol-file\" commands (note that you must take care of relocating\n\
913 symbols to the proper address)."),
914 symfile_objfile->name);
915 free_objfile (symfile_objfile);
916 symfile_objfile = NULL;
918 breakpoint_re_set ();
921 /* As well as symbol tables, exec_sections need relocation. After
922 the inferior process' termination, there will be a relocated symbol
923 table exist with no corresponding inferior process. At that time, we
924 need to use `exec' bfd, rather than the inferior process's memory space
927 `exec_sections' need to be relocated only once, as long as the exec
928 file remains unchanged.
937 if (execbfd == exec_bfd)
942 if (!vmap || !exec_ops.to_sections)
943 error (_("vmap_exec: vmap or exec_ops.to_sections == 0."));
945 for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
947 if (strcmp (".text", exec_ops.to_sections[i].the_bfd_section->name) == 0)
949 exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
950 exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
952 else if (strcmp (".data",
953 exec_ops.to_sections[i].the_bfd_section->name) == 0)
955 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
956 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
958 else if (strcmp (".bss",
959 exec_ops.to_sections[i].the_bfd_section->name) == 0)
961 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
962 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
967 /* Set the current architecture from the host running GDB. Called when
968 starting a child process. */
970 static void (*super_create_inferior) (char *exec_file, char *allargs,
971 char **env, int from_tty);
973 rs6000_create_inferior (char *exec_file, char *allargs, char **env, int from_tty)
975 enum bfd_architecture arch;
978 struct gdbarch_info info;
980 super_create_inferior (exec_file, allargs, env, from_tty);
984 arch = bfd_arch_rs6000;
985 mach = bfd_mach_rs6k;
989 arch = bfd_arch_powerpc;
993 /* FIXME: schauer/2002-02-25:
994 We don't know if we are executing a 32 or 64 bit executable,
995 and have no way to pass the proper word size to rs6000_gdbarch_init.
996 So we have to avoid switching to a new architecture, if the architecture
998 Blindly calling rs6000_gdbarch_init used to work in older versions of
999 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
1000 determine the wordsize. */
1003 const struct bfd_arch_info *exec_bfd_arch_info;
1005 exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
1006 if (arch == exec_bfd_arch_info->arch)
1010 bfd_default_set_arch_mach (&abfd, arch, mach);
1012 gdbarch_info_init (&info);
1013 info.bfd_arch_info = bfd_get_arch_info (&abfd);
1014 info.abfd = exec_bfd;
1016 if (!gdbarch_update_p (info))
1017 internal_error (__FILE__, __LINE__,
1018 _("rs6000_create_inferior: failed to select architecture"));
1022 /* xcoff_relocate_symtab - hook for symbol table relocation.
1024 This is only applicable to live processes, and is a no-op when
1025 debugging a core file. */
1028 xcoff_relocate_symtab (unsigned int pid)
1030 int load_segs = 64; /* number of load segments */
1033 int arch64 = ARCH64 ();
1034 int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
1037 if (ptid_equal (inferior_ptid, null_ptid))
1042 size = load_segs * ldisize;
1043 ldi = (void *) xrealloc (ldi, size);
1046 /* According to my humble theory, AIX has some timing problems and
1047 when the user stack grows, kernel doesn't update stack info in time
1048 and ptrace calls step on user stack. That is why we sleep here a
1049 little, and give kernel to update its internals. */
1054 rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
1056 rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
1060 if (errno == ENOMEM)
1063 perror_with_name (_("ptrace ldinfo"));
1068 vmap_exec (); /* relocate the exec and core sections as well. */
1075 /* Core file stuff. */
1077 /* Relocate symtabs and read in shared library info, based on symbols
1078 from the core file. */
1081 xcoff_relocate_core (struct target_ops *target)
1083 struct bfd_section *ldinfo_sec;
1087 int arch64 = ARCH64 ();
1089 /* Size of a struct ld_info except for the variable-length filename. */
1090 int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
1092 /* Allocated size of buffer. */
1093 int buffer_size = nonfilesz;
1094 char *buffer = xmalloc (buffer_size);
1095 struct cleanup *old = make_cleanup (free_current_contents, &buffer);
1097 ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
1098 if (ldinfo_sec == NULL)
1101 fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
1102 bfd_errmsg (bfd_get_error ()));
1109 int names_found = 0;
1111 /* Read in everything but the name. */
1112 if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
1113 offset, nonfilesz) == 0)
1120 if (i == buffer_size)
1123 buffer = xrealloc (buffer, buffer_size);
1125 if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
1126 offset + i, 1) == 0)
1128 if (buffer[i++] == '\0')
1131 while (names_found < 2);
1133 ldi = (LdInfo *) buffer;
1135 /* Can't use a file descriptor from the core file; need to open it. */
1137 ldi->l64.ldinfo_fd = -1;
1139 ldi->l32.ldinfo_fd = -1;
1141 /* The first ldinfo is for the exec file, allocated elsewhere. */
1142 if (offset == 0 && vmap != NULL)
1145 vp = add_vmap (ldi);
1147 /* Process next shared library upon error. */
1148 offset += LDI_NEXT (ldi, arch64);
1152 vmap_secs (vp, ldi, arch64);
1154 /* Unless this is the exec file,
1155 add our sections to the section table for the core target. */
1158 struct section_table *stp;
1160 target_resize_to_sections (target, 2);
1161 stp = target->to_sections_end - 2;
1164 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
1165 stp->addr = vp->tstart;
1166 stp->endaddr = vp->tend;
1170 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
1171 stp->addr = vp->dstart;
1172 stp->endaddr = vp->dend;
1177 if (vp != vmap && vp->objfile)
1178 observer_notify_new_objfile (vp->objfile);
1180 while (LDI_NEXT (ldi, arch64) != 0);
1182 breakpoint_re_set ();
1186 /* Under AIX, we have to pass the correct TOC pointer to a function
1187 when calling functions in the inferior.
1188 We try to find the relative toc offset of the objfile containing PC
1189 and add the current load address of the data segment from the vmap. */
1192 find_toc_address (CORE_ADDR pc)
1195 extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */
1197 for (vp = vmap; vp; vp = vp->nxt)
1199 if (pc >= vp->tstart && pc < vp->tend)
1201 /* vp->objfile is only NULL for the exec file. */
1202 return vp->dstart + get_toc_offset (vp->objfile == NULL
1207 error (_("Unable to find TOC entry for pc %s."), hex_string (pc));
1212 _initialize_rs6000_nat (void)
1214 struct target_ops *t;
1216 t = inf_ptrace_target ();
1217 t->to_fetch_registers = rs6000_fetch_inferior_registers;
1218 t->to_store_registers = rs6000_store_inferior_registers;
1219 t->to_xfer_partial = rs6000_xfer_partial;
1221 super_create_inferior = t->to_create_inferior;
1222 t->to_create_inferior = rs6000_create_inferior;
1224 t->to_wait = rs6000_wait;
1228 /* Initialize hook in rs6000-tdep.c for determining the TOC address
1229 when calling functions in the inferior. */
1230 rs6000_find_toc_address_hook = find_toc_address;