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
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 2 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, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
28 #include "xcoffsolib.h"
31 #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */
33 #include "exceptions.h"
34 #include "gdb-stabs.h"
36 #include "arch-utils.h"
37 #include "inf-ptrace.h"
39 #include "rs6000-tdep.h"
41 #include "gdb_stdint.h"
44 #include <sys/ptrace.h>
47 #include <sys/param.h>
51 #include <sys/ioctl.h>
59 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
60 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
62 #include <sys/systemcfg.h>
64 /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
65 debugging 32-bit and 64-bit processes. Define a typedef and macros for
66 accessing fields in the appropriate structures. */
68 /* In 32-bit compilation mode (which is the only mode from which ptrace()
69 works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
75 /* Return whether the current architecture is 64-bit. */
80 # define ARCH64() (register_size (current_gdbarch, 0) == 8)
83 /* Union of 32-bit and 64-bit versions of ld_info. */
90 struct __ld_info32 l32;
91 struct __ld_info64 l64;
95 /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
96 declare and initialize a variable named VAR suitable for use as the arch64
97 parameter to the various LDI_*() macros. */
100 # define ARCH64_DECL(var)
102 # define ARCH64_DECL(var) int var = ARCH64 ()
105 /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
106 otherwise. This technique only works for FIELDs with the same data type in
107 32-bit and 64-bit versions of ld_info. */
110 # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
112 # define LDI_FIELD(ldi, arch64, field) \
113 (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
116 /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
117 process otherwise. */
119 #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
120 #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
121 #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
123 extern struct vmap *map_vmap (bfd * bf, bfd * arch);
125 static void vmap_exec (void);
127 static void vmap_ldinfo (LdInfo *);
129 static struct vmap *add_vmap (LdInfo *);
131 static int objfile_symbol_add (void *);
133 static void vmap_symtab (struct vmap *);
135 static void exec_one_dummy_insn (void);
137 extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta);
139 /* Given REGNO, a gdb register number, return the corresponding
140 number suitable for use as a ptrace() parameter. Return -1 if
141 there's no suitable mapping. Also, set the int pointed to by
142 ISFLOAT to indicate whether REGNO is a floating point register. */
145 regmap (int regno, int *isfloat)
147 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
150 if (tdep->ppc_gp0_regnum <= regno
151 && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
153 else if (tdep->ppc_fp0_regnum >= 0
154 && tdep->ppc_fp0_regnum <= regno
155 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
158 return regno - tdep->ppc_fp0_regnum + FPR0;
160 else if (regno == PC_REGNUM)
162 else if (regno == tdep->ppc_ps_regnum)
164 else if (regno == tdep->ppc_cr_regnum)
166 else if (regno == tdep->ppc_lr_regnum)
168 else if (regno == tdep->ppc_ctr_regnum)
170 else if (regno == tdep->ppc_xer_regnum)
172 else if (tdep->ppc_fpscr_regnum >= 0
173 && regno == tdep->ppc_fpscr_regnum)
175 else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum)
181 /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
184 rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
186 int ret = ptrace (req, id, (int *)addr, data, buf);
188 printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
189 req, id, (unsigned int)addr, data, (unsigned int)buf, ret);
194 /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
197 rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf)
200 int ret = ptracex (req, id, addr, data, buf);
205 printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
206 req, id, addr, data, (unsigned int)buf, ret);
211 /* Fetch register REGNO from the inferior. */
214 fetch_register (struct regcache *regcache, int regno)
216 int addr[MAX_REGISTER_SIZE];
219 /* Retrieved values may be -1, so infer errors from errno. */
222 nr = regmap (regno, &isfloat);
224 /* Floating-point registers. */
226 rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0);
228 /* Bogus register number. */
231 if (regno >= gdbarch_num_regs (current_gdbarch))
232 fprintf_unfiltered (gdb_stderr,
233 "gdb error: register no %d not implemented.\n",
238 /* Fixed-point registers. */
242 *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0);
245 /* PT_READ_GPR requires the buffer parameter to point to long long,
246 even if the register is really only 32 bits. */
248 rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
249 if (register_size (current_gdbarch, regno) == 8)
250 memcpy (addr, &buf, 8);
257 regcache_raw_supply (regcache, regno, (char *) addr);
261 /* FIXME: this happens 3 times at the start of each 64-bit program. */
262 perror ("ptrace read");
268 /* Store register REGNO back into the inferior. */
271 store_register (const struct regcache *regcache, int regno)
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 (current_gdbarch))
292 fprintf_unfiltered (gdb_stderr,
293 "gdb error: register no %d not implemented.\n",
297 /* Fixed-point registers. */
300 if (regno == SP_REGNUM)
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 (current_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)
340 fetch_register (regcache, regno);
344 struct gdbarch_tdep *tdep = gdbarch_tdep (current_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, PC_REGNUM);
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)
381 store_register (regcache, regno);
385 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
387 /* Write general purpose registers first. */
388 for (regno = tdep->ppc_gp0_regnum;
389 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
392 store_register (regcache, regno);
395 /* Write floating point registers. */
396 if (tdep->ppc_fp0_regnum >= 0)
397 for (regno = 0; regno < ppc_num_fprs; regno++)
398 store_register (regcache, tdep->ppc_fp0_regnum + regno);
400 /* Write special registers. */
401 store_register (regcache, PC_REGNUM);
402 store_register (regcache, tdep->ppc_ps_regnum);
403 store_register (regcache, tdep->ppc_cr_regnum);
404 store_register (regcache, tdep->ppc_lr_regnum);
405 store_register (regcache, tdep->ppc_ctr_regnum);
406 store_register (regcache, tdep->ppc_xer_regnum);
407 if (tdep->ppc_fpscr_regnum >= 0)
408 store_register (regcache, tdep->ppc_fpscr_regnum);
409 if (tdep->ppc_mq_regnum >= 0)
410 store_register (regcache, tdep->ppc_mq_regnum);
415 /* Attempt a transfer all LEN bytes starting at OFFSET between the
416 inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
417 Return the number of bytes actually transferred. */
420 rs6000_xfer_partial (struct target_ops *ops, enum target_object object,
421 const char *annex, gdb_byte *readbuf,
422 const gdb_byte *writebuf,
423 ULONGEST offset, LONGEST len)
425 pid_t pid = ptid_get_pid (inferior_ptid);
426 int arch64 = ARCH64 ();
430 case TARGET_OBJECT_MEMORY:
434 PTRACE_TYPE_RET word;
435 gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
437 ULONGEST rounded_offset;
440 /* Round the start offset down to the next long word
442 rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
444 /* Since ptrace will transfer a single word starting at that
445 rounded_offset the partial_len needs to be adjusted down to
446 that (remember this function only does a single transfer).
447 Should the required length be even less, adjust it down
449 partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
450 if (partial_len > len)
455 /* If OFFSET:PARTIAL_LEN is smaller than
456 ROUNDED_OFFSET:WORDSIZE then a read/modify write will
457 be needed. Read in the entire word. */
458 if (rounded_offset < offset
459 || (offset + partial_len
460 < rounded_offset + sizeof (PTRACE_TYPE_RET)))
462 /* Need part of initial word -- fetch it. */
464 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
465 rounded_offset, 0, NULL);
467 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
468 (int *)(uintptr_t)rounded_offset,
472 /* Copy data to be written over corresponding part of
474 memcpy (buffer.byte + (offset - rounded_offset),
475 writebuf, partial_len);
479 rs6000_ptrace64 (PT_WRITE_D, pid,
480 rounded_offset, buffer.word, NULL);
482 rs6000_ptrace32 (PT_WRITE_D, pid,
483 (int *)(uintptr_t)rounded_offset, buffer.word, NULL);
492 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
493 rounded_offset, 0, NULL);
495 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
496 (int *)(uintptr_t)rounded_offset,
501 /* Copy appropriate bytes out of the buffer. */
502 memcpy (readbuf, buffer.byte + (offset - rounded_offset),
514 /* Wait for the child specified by PTID to do something. Return the
515 process ID of the child, or MINUS_ONE_PTID in case of error; store
516 the status in *OURSTATUS. */
519 rs6000_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
522 int status, save_errno;
531 pid = waitpid (ptid_get_pid (ptid), &status, 0);
534 while (pid == -1 && errno == EINTR);
537 clear_sigint_trap ();
541 fprintf_unfiltered (gdb_stderr,
542 _("Child process unexpectedly missing: %s.\n"),
543 safe_strerror (save_errno));
545 /* Claim it exited with unknown signal. */
546 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
547 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
548 return minus_one_ptid;
551 /* Ignore terminated detached child processes. */
552 if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
557 /* AIX has a couple of strange returns from wait(). */
559 /* stop after load" status. */
561 ourstatus->kind = TARGET_WAITKIND_LOADED;
562 /* signal 0. I have no idea why wait(2) returns with this status word. */
563 else if (status == 0x7f)
564 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
565 /* A normal waitstatus. Let the usual macros deal with it. */
567 store_waitstatus (ourstatus, status);
569 return pid_to_ptid (pid);
572 /* Execute one dummy breakpoint instruction. This way we give the kernel
573 a chance to do some housekeeping and update inferior's internal data,
577 exec_one_dummy_insn (void)
579 #define DUMMY_INSN_ADDR gdbarch_tdep (current_gdbarch)->text_segment_base+0x200
581 int ret, status, pid;
585 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
586 assume that this address will never be executed again by the real
589 bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR);
591 /* You might think this could be done with a single ptrace call, and
592 you'd be correct for just about every platform I've ever worked
593 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
594 the inferior never hits the breakpoint (it's also worth noting
595 powerpc-ibm-aix4.1.3 works correctly). */
596 prev_pc = read_pc ();
597 write_pc (DUMMY_INSN_ADDR);
599 ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
601 ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL);
604 perror ("pt_continue");
608 pid = wait (&status);
610 while (pid != PIDGET (inferior_ptid));
613 deprecated_remove_raw_breakpoint (bp);
617 /* Copy information about text and data sections from LDI to VP for a 64-bit
618 process if ARCH64 and for a 32-bit process otherwise. */
621 vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
625 vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
626 vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
627 vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
628 vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
632 vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
633 vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
634 vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
635 vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
638 /* The run time loader maps the file header in addition to the text
639 section and returns a pointer to the header in ldinfo_textorg.
640 Adjust the text start address to point to the real start address
641 of the text section. */
642 vp->tstart += vp->toffs;
645 /* handle symbol translation on vmapping */
648 vmap_symtab (struct vmap *vp)
650 struct objfile *objfile;
651 struct section_offsets *new_offsets;
654 objfile = vp->objfile;
657 /* OK, it's not an objfile we opened ourselves.
658 Currently, that can only happen with the exec file, so
659 relocate the symbols for the symfile. */
660 if (symfile_objfile == NULL)
662 objfile = symfile_objfile;
664 else if (!vp->loaded)
665 /* If symbols are not yet loaded, offsets are not yet valid. */
669 (struct section_offsets *)
670 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
672 for (i = 0; i < objfile->num_sections; ++i)
673 new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
675 /* The symbols in the object file are linked to the VMA of the section,
676 relocate them VMA relative. */
677 new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
678 new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
679 new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
681 objfile_relocate (objfile, new_offsets);
684 /* Add symbols for an objfile. */
687 objfile_symbol_add (void *arg)
689 struct objfile *obj = (struct objfile *) arg;
691 syms_from_objfile (obj, NULL, 0, 0, 0, 0);
692 new_symfile_objfile (obj, 0, 0);
696 /* Add symbols for a vmap. Return zero upon error. */
699 vmap_add_symbols (struct vmap *vp)
701 if (catch_errors (objfile_symbol_add, vp->objfile,
702 "Error while reading shared library symbols:\n",
705 /* Note this is only done if symbol reading was successful. */
713 /* Add a new vmap entry based on ldinfo() information.
715 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
716 core file), the caller should set it to -1, and we will open the file.
718 Return the vmap new entry. */
721 add_vmap (LdInfo *ldi)
724 char *mem, *objname, *filename;
728 ARCH64_DECL (arch64);
730 /* This ldi structure was allocated using alloca() in
731 xcoff_relocate_symtab(). Now we need to have persistent object
732 and member names, so we should save them. */
734 filename = LDI_FILENAME (ldi, arch64);
735 mem = filename + strlen (filename) + 1;
736 mem = savestring (mem, strlen (mem));
737 objname = savestring (filename, strlen (filename));
739 fd = LDI_FD (ldi, arch64);
741 /* Note that this opens it once for every member; a possible
742 enhancement would be to only open it once for every object. */
743 abfd = bfd_openr (objname, gnutarget);
745 abfd = bfd_fdopenr (objname, gnutarget, fd);
748 warning (_("Could not open `%s' as an executable file: %s"),
749 objname, bfd_errmsg (bfd_get_error ()));
753 /* make sure we have an object file */
755 if (bfd_check_format (abfd, bfd_object))
756 vp = map_vmap (abfd, 0);
758 else if (bfd_check_format (abfd, bfd_archive))
761 /* FIXME??? am I tossing BFDs? bfd? */
762 while ((last = bfd_openr_next_archived_file (abfd, last)))
763 if (DEPRECATED_STREQ (mem, last->filename))
768 warning (_("\"%s\": member \"%s\" missing."), objname, mem);
773 if (!bfd_check_format (last, bfd_object))
775 warning (_("\"%s\": member \"%s\" not in executable format: %s."),
776 objname, mem, bfd_errmsg (bfd_get_error ()));
782 vp = map_vmap (last, abfd);
786 warning (_("\"%s\": not in executable format: %s."),
787 objname, bfd_errmsg (bfd_get_error ()));
791 obj = allocate_objfile (vp->bfd, 0);
794 /* Always add symbols for the main objfile. */
795 if (vp == vmap || auto_solib_add)
796 vmap_add_symbols (vp);
800 /* update VMAP info with ldinfo() information
801 Input is ptr to ldinfo() results. */
804 vmap_ldinfo (LdInfo *ldi)
808 int got_one, retried;
809 int got_exec_file = 0;
811 int arch64 = ARCH64 ();
813 /* For each *ldi, see if we have a corresponding *vp.
814 If so, update the mapping, and symbol table.
815 If not, add an entry and symbol table. */
819 char *name = LDI_FILENAME (ldi, arch64);
820 char *memb = name + strlen (name) + 1;
821 int fd = LDI_FD (ldi, arch64);
825 if (fstat (fd, &ii) < 0)
827 /* The kernel sets ld_info to -1, if the process is still using the
828 object, and the object is removed. Keep the symbol info for the
829 removed object and issue a warning. */
830 warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
835 for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
837 struct objfile *objfile;
839 /* First try to find a `vp', which is the same as in ldinfo.
840 If not the same, just continue and grep the next `vp'. If same,
841 relocate its tstart, tend, dstart, dend values. If no such `vp'
842 found, get out of this for loop, add this ldi entry as a new vmap
843 (add_vmap) and come back, find its `vp' and so on... */
845 /* The filenames are not always sufficient to match on. */
847 if ((name[0] == '/' && !DEPRECATED_STREQ (name, vp->name))
848 || (memb[0] && !DEPRECATED_STREQ (memb, vp->member)))
851 /* See if we are referring to the same file.
852 We have to check objfile->obfd, symfile.c:reread_symbols might
853 have updated the obfd after a change. */
854 objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
856 || objfile->obfd == NULL
857 || bfd_stat (objfile->obfd, &vi) < 0)
859 warning (_("Unable to stat %s, keeping its symbols"), name);
863 if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
871 /* Found a corresponding VMAP. Remap! */
873 vmap_secs (vp, ldi, arch64);
875 /* The objfile is only NULL for the exec file. */
876 if (vp->objfile == NULL)
879 /* relocate symbol table(s). */
882 /* Announce new object files. Doing this after symbol relocation
883 makes aix-thread.c's job easier. */
885 observer_notify_new_objfile (vp->objfile);
887 /* There may be more, so we don't break out of the loop. */
890 /* if there was no matching *vp, we must perforce create the sucker(s) */
891 if (!got_one && !retried)
898 while ((next = LDI_NEXT (ldi, arch64))
899 && (ldi = (void *) (next + (char *) ldi)));
901 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
902 is unlikely that the symbol file is relocated to the proper
903 address. And we might have attached to a process which is
904 running a different copy of the same executable. */
905 if (symfile_objfile != NULL && !got_exec_file)
907 warning (_("Symbol file %s\nis not mapped; discarding it.\n\
908 If in fact that file has symbols which the mapped files listed by\n\
909 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
910 \"add-symbol-file\" commands (note that you must take care of relocating\n\
911 symbols to the proper address)."),
912 symfile_objfile->name);
913 free_objfile (symfile_objfile);
914 symfile_objfile = NULL;
916 breakpoint_re_set ();
919 /* As well as symbol tables, exec_sections need relocation. After
920 the inferior process' termination, there will be a relocated symbol
921 table exist with no corresponding inferior process. At that time, we
922 need to use `exec' bfd, rather than the inferior process's memory space
925 `exec_sections' need to be relocated only once, as long as the exec
926 file remains unchanged.
935 if (execbfd == exec_bfd)
940 if (!vmap || !exec_ops.to_sections)
941 error (_("vmap_exec: vmap or exec_ops.to_sections == 0."));
943 for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
945 if (DEPRECATED_STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name))
947 exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
948 exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
950 else if (DEPRECATED_STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name))
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 (DEPRECATED_STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name))
957 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
958 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
963 /* Set the current architecture from the host running GDB. Called when
964 starting a child process. */
966 static void (*super_create_inferior) (char *exec_file, char *allargs,
967 char **env, int from_tty);
969 rs6000_create_inferior (char *exec_file, char *allargs, char **env, int from_tty)
971 enum bfd_architecture arch;
974 struct gdbarch_info info;
976 super_create_inferior (exec_file, allargs, env, from_tty);
980 arch = bfd_arch_rs6000;
981 mach = bfd_mach_rs6k;
985 arch = bfd_arch_powerpc;
989 /* FIXME: schauer/2002-02-25:
990 We don't know if we are executing a 32 or 64 bit executable,
991 and have no way to pass the proper word size to rs6000_gdbarch_init.
992 So we have to avoid switching to a new architecture, if the architecture
994 Blindly calling rs6000_gdbarch_init used to work in older versions of
995 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
996 determine the wordsize. */
999 const struct bfd_arch_info *exec_bfd_arch_info;
1001 exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
1002 if (arch == exec_bfd_arch_info->arch)
1006 bfd_default_set_arch_mach (&abfd, arch, mach);
1008 gdbarch_info_init (&info);
1009 info.bfd_arch_info = bfd_get_arch_info (&abfd);
1010 info.abfd = exec_bfd;
1012 if (!gdbarch_update_p (info))
1013 internal_error (__FILE__, __LINE__,
1014 _("rs6000_create_inferior: failed to select architecture"));
1018 /* xcoff_relocate_symtab - hook for symbol table relocation.
1020 This is only applicable to live processes, and is a no-op when
1021 debugging a core file. */
1024 xcoff_relocate_symtab (unsigned int pid)
1026 int load_segs = 64; /* number of load segments */
1029 int arch64 = ARCH64 ();
1030 int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
1033 if (ptid_equal (inferior_ptid, null_ptid))
1038 size = load_segs * ldisize;
1039 ldi = (void *) xrealloc (ldi, size);
1042 /* According to my humble theory, AIX has some timing problems and
1043 when the user stack grows, kernel doesn't update stack info in time
1044 and ptrace calls step on user stack. That is why we sleep here a
1045 little, and give kernel to update its internals. */
1050 rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
1052 rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
1056 if (errno == ENOMEM)
1059 perror_with_name (_("ptrace ldinfo"));
1064 vmap_exec (); /* relocate the exec and core sections as well. */
1071 /* Core file stuff. */
1073 /* Relocate symtabs and read in shared library info, based on symbols
1074 from the core file. */
1077 xcoff_relocate_core (struct target_ops *target)
1079 struct bfd_section *ldinfo_sec;
1083 int arch64 = ARCH64 ();
1085 /* Size of a struct ld_info except for the variable-length filename. */
1086 int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
1088 /* Allocated size of buffer. */
1089 int buffer_size = nonfilesz;
1090 char *buffer = xmalloc (buffer_size);
1091 struct cleanup *old = make_cleanup (free_current_contents, &buffer);
1093 ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
1094 if (ldinfo_sec == NULL)
1097 fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
1098 bfd_errmsg (bfd_get_error ()));
1105 int names_found = 0;
1107 /* Read in everything but the name. */
1108 if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
1109 offset, nonfilesz) == 0)
1116 if (i == buffer_size)
1119 buffer = xrealloc (buffer, buffer_size);
1121 if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
1122 offset + i, 1) == 0)
1124 if (buffer[i++] == '\0')
1127 while (names_found < 2);
1129 ldi = (LdInfo *) buffer;
1131 /* Can't use a file descriptor from the core file; need to open it. */
1133 ldi->l64.ldinfo_fd = -1;
1135 ldi->l32.ldinfo_fd = -1;
1137 /* The first ldinfo is for the exec file, allocated elsewhere. */
1138 if (offset == 0 && vmap != NULL)
1141 vp = add_vmap (ldi);
1143 /* Process next shared library upon error. */
1144 offset += LDI_NEXT (ldi, arch64);
1148 vmap_secs (vp, ldi, arch64);
1150 /* Unless this is the exec file,
1151 add our sections to the section table for the core target. */
1154 struct section_table *stp;
1156 target_resize_to_sections (target, 2);
1157 stp = target->to_sections_end - 2;
1160 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
1161 stp->addr = vp->tstart;
1162 stp->endaddr = vp->tend;
1166 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
1167 stp->addr = vp->dstart;
1168 stp->endaddr = vp->dend;
1173 if (vp != vmap && vp->objfile)
1174 observer_notify_new_objfile (vp->objfile);
1176 while (LDI_NEXT (ldi, arch64) != 0);
1178 breakpoint_re_set ();
1182 /* Under AIX, we have to pass the correct TOC pointer to a function
1183 when calling functions in the inferior.
1184 We try to find the relative toc offset of the objfile containing PC
1185 and add the current load address of the data segment from the vmap. */
1188 find_toc_address (CORE_ADDR pc)
1191 extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */
1193 for (vp = vmap; vp; vp = vp->nxt)
1195 if (pc >= vp->tstart && pc < vp->tend)
1197 /* vp->objfile is only NULL for the exec file. */
1198 return vp->dstart + get_toc_offset (vp->objfile == NULL
1203 error (_("Unable to find TOC entry for pc %s."), hex_string (pc));
1208 _initialize_rs6000_nat (void)
1210 struct target_ops *t;
1212 t = inf_ptrace_target ();
1213 t->to_fetch_registers = rs6000_fetch_inferior_registers;
1214 t->to_store_registers = rs6000_store_inferior_registers;
1215 t->to_xfer_partial = rs6000_xfer_partial;
1217 super_create_inferior = t->to_create_inferior;
1218 t->to_create_inferior = rs6000_create_inferior;
1220 t->to_wait = rs6000_wait;
1224 /* Initialize hook in rs6000-tdep.c for determining the TOC address
1225 when calling functions in the inferior. */
1226 rs6000_find_toc_address_hook = find_toc_address;