1 /* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
3 Copyright (C) 1986-1987, 1989, 1991-2004, 2007-2012 Free Software
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "xcoffsolib.h"
28 #include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */
30 #include "exceptions.h"
31 #include "gdb-stabs.h"
33 #include "arch-utils.h"
34 #include "inf-ptrace.h"
36 #include "rs6000-tdep.h"
39 #include "xcoffread.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 (target_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 regcache *);
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, %s, %08x, 0x%x) = 0x%x\n",
203 req, id, hex_string (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),
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 (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 (gdbarch, 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 (regcache);
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),
313 (int *) nr, *addr, 0);
316 /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
317 area, even if the register is really only 32 bits. */
319 if (register_size (gdbarch, regno) == 8)
320 memcpy (&buf, addr, 8);
323 rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
329 perror (_("ptrace write"));
334 /* Read from the inferior all registers if REGNO == -1 and just register
338 rs6000_fetch_inferior_registers (struct target_ops *ops,
339 struct regcache *regcache, int regno)
341 struct gdbarch *gdbarch = get_regcache_arch (regcache);
343 fetch_register (regcache, regno);
347 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
349 /* Read 32 general purpose registers. */
350 for (regno = tdep->ppc_gp0_regnum;
351 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
354 fetch_register (regcache, regno);
357 /* Read general purpose floating point registers. */
358 if (tdep->ppc_fp0_regnum >= 0)
359 for (regno = 0; regno < ppc_num_fprs; regno++)
360 fetch_register (regcache, tdep->ppc_fp0_regnum + regno);
362 /* Read special registers. */
363 fetch_register (regcache, gdbarch_pc_regnum (gdbarch));
364 fetch_register (regcache, tdep->ppc_ps_regnum);
365 fetch_register (regcache, tdep->ppc_cr_regnum);
366 fetch_register (regcache, tdep->ppc_lr_regnum);
367 fetch_register (regcache, tdep->ppc_ctr_regnum);
368 fetch_register (regcache, tdep->ppc_xer_regnum);
369 if (tdep->ppc_fpscr_regnum >= 0)
370 fetch_register (regcache, tdep->ppc_fpscr_regnum);
371 if (tdep->ppc_mq_regnum >= 0)
372 fetch_register (regcache, tdep->ppc_mq_regnum);
376 /* Store our register values back into the inferior.
377 If REGNO is -1, do this for all registers.
378 Otherwise, REGNO specifies which register (so we can save time). */
381 rs6000_store_inferior_registers (struct target_ops *ops,
382 struct regcache *regcache, int regno)
384 struct gdbarch *gdbarch = get_regcache_arch (regcache);
386 store_register (regcache, regno);
390 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
392 /* Write general purpose registers first. */
393 for (regno = tdep->ppc_gp0_regnum;
394 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
397 store_register (regcache, regno);
400 /* Write floating point registers. */
401 if (tdep->ppc_fp0_regnum >= 0)
402 for (regno = 0; regno < ppc_num_fprs; regno++)
403 store_register (regcache, tdep->ppc_fp0_regnum + regno);
405 /* Write special registers. */
406 store_register (regcache, gdbarch_pc_regnum (gdbarch));
407 store_register (regcache, tdep->ppc_ps_regnum);
408 store_register (regcache, tdep->ppc_cr_regnum);
409 store_register (regcache, tdep->ppc_lr_regnum);
410 store_register (regcache, tdep->ppc_ctr_regnum);
411 store_register (regcache, tdep->ppc_xer_regnum);
412 if (tdep->ppc_fpscr_regnum >= 0)
413 store_register (regcache, tdep->ppc_fpscr_regnum);
414 if (tdep->ppc_mq_regnum >= 0)
415 store_register (regcache, tdep->ppc_mq_regnum);
420 /* Attempt a transfer all LEN bytes starting at OFFSET between the
421 inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
422 Return the number of bytes actually transferred. */
425 rs6000_xfer_partial (struct target_ops *ops, enum target_object object,
426 const char *annex, gdb_byte *readbuf,
427 const gdb_byte *writebuf,
428 ULONGEST offset, LONGEST len)
430 pid_t pid = ptid_get_pid (inferior_ptid);
431 int arch64 = ARCH64 ();
435 case TARGET_OBJECT_MEMORY:
439 PTRACE_TYPE_RET word;
440 gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
442 ULONGEST rounded_offset;
445 /* Round the start offset down to the next long word
447 rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
449 /* Since ptrace will transfer a single word starting at that
450 rounded_offset the partial_len needs to be adjusted down to
451 that (remember this function only does a single transfer).
452 Should the required length be even less, adjust it down
454 partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
455 if (partial_len > len)
460 /* If OFFSET:PARTIAL_LEN is smaller than
461 ROUNDED_OFFSET:WORDSIZE then a read/modify write will
462 be needed. Read in the entire word. */
463 if (rounded_offset < offset
464 || (offset + partial_len
465 < rounded_offset + sizeof (PTRACE_TYPE_RET)))
467 /* Need part of initial word -- fetch it. */
469 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
470 rounded_offset, 0, NULL);
472 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
478 /* Copy data to be written over corresponding part of
480 memcpy (buffer.byte + (offset - rounded_offset),
481 writebuf, partial_len);
485 rs6000_ptrace64 (PT_WRITE_D, pid,
486 rounded_offset, buffer.word, NULL);
488 rs6000_ptrace32 (PT_WRITE_D, pid,
489 (int *) (uintptr_t) rounded_offset,
499 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
500 rounded_offset, 0, NULL);
502 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
503 (int *)(uintptr_t)rounded_offset,
508 /* Copy appropriate bytes out of the buffer. */
509 memcpy (readbuf, buffer.byte + (offset - rounded_offset),
521 /* Wait for the child specified by PTID to do something. Return the
522 process ID of the child, or MINUS_ONE_PTID in case of error; store
523 the status in *OURSTATUS. */
526 rs6000_wait (struct target_ops *ops,
527 ptid_t ptid, struct target_waitstatus *ourstatus, int options)
530 int status, save_errno;
538 pid = waitpid (ptid_get_pid (ptid), &status, 0);
541 while (pid == -1 && errno == EINTR);
543 clear_sigint_trap ();
547 fprintf_unfiltered (gdb_stderr,
548 _("Child process unexpectedly missing: %s.\n"),
549 safe_strerror (save_errno));
551 /* Claim it exited with unknown signal. */
552 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
553 ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
554 return inferior_ptid;
557 /* Ignore terminated detached child processes. */
558 if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
563 /* AIX has a couple of strange returns from wait(). */
565 /* stop after load" status. */
567 ourstatus->kind = TARGET_WAITKIND_LOADED;
568 /* signal 0. I have no idea why wait(2) returns with this status word. */
569 else if (status == 0x7f)
570 ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
571 /* A normal waitstatus. Let the usual macros deal with it. */
573 store_waitstatus (ourstatus, status);
575 return pid_to_ptid (pid);
578 /* Execute one dummy breakpoint instruction. This way we give the kernel
579 a chance to do some housekeeping and update inferior's internal data,
583 exec_one_dummy_insn (struct regcache *regcache)
585 #define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200
587 struct gdbarch *gdbarch = get_regcache_arch (regcache);
588 int ret, status, pid;
592 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
593 assume that this address will never be executed again by the real
596 bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR);
598 /* You might think this could be done with a single ptrace call, and
599 you'd be correct for just about every platform I've ever worked
600 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
601 the inferior never hits the breakpoint (it's also worth noting
602 powerpc-ibm-aix4.1.3 works correctly). */
603 prev_pc = regcache_read_pc (regcache);
604 regcache_write_pc (regcache, DUMMY_INSN_ADDR);
606 ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
608 ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid),
612 perror (_("pt_continue"));
616 pid = waitpid (PIDGET (inferior_ptid), &status, 0);
618 while (pid != PIDGET (inferior_ptid));
620 regcache_write_pc (regcache, prev_pc);
621 deprecated_remove_raw_breakpoint (gdbarch, bp);
625 /* Copy information about text and data sections from LDI to VP for a 64-bit
626 process if ARCH64 and for a 32-bit process otherwise. */
629 vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
633 vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
634 vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
635 vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
636 vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
640 vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
641 vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
642 vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
643 vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
646 /* The run time loader maps the file header in addition to the text
647 section and returns a pointer to the header in ldinfo_textorg.
648 Adjust the text start address to point to the real start address
649 of the text section. */
650 vp->tstart += vp->toffs;
653 /* Handle symbol translation on vmapping. */
656 vmap_symtab (struct vmap *vp)
658 struct objfile *objfile;
659 struct section_offsets *new_offsets;
662 objfile = vp->objfile;
665 /* OK, it's not an objfile we opened ourselves.
666 Currently, that can only happen with the exec file, so
667 relocate the symbols for the symfile. */
668 if (symfile_objfile == NULL)
670 objfile = symfile_objfile;
672 else if (!vp->loaded)
673 /* If symbols are not yet loaded, offsets are not yet valid. */
677 (struct section_offsets *)
678 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
680 for (i = 0; i < objfile->num_sections; ++i)
681 new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
683 /* The symbols in the object file are linked to the VMA of the section,
684 relocate them VMA relative. */
685 new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
686 new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
687 new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
689 objfile_relocate (objfile, new_offsets);
692 /* Add symbols for an objfile. */
695 objfile_symbol_add (void *arg)
697 struct objfile *obj = (struct objfile *) arg;
699 syms_from_objfile (obj, NULL, 0, 0, 0);
700 new_symfile_objfile (obj, 0);
704 /* Add symbols for a vmap. Return zero upon error. */
707 vmap_add_symbols (struct vmap *vp)
709 if (catch_errors (objfile_symbol_add, vp->objfile,
710 "Error while reading shared library symbols:\n",
713 /* Note this is only done if symbol reading was successful. */
721 /* Add a new vmap entry based on ldinfo() information.
723 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
724 core file), the caller should set it to -1, and we will open the file.
726 Return the vmap new entry. */
729 add_vmap (LdInfo *ldi)
732 char *mem, *objname, *filename;
736 ARCH64_DECL (arch64);
738 /* This ldi structure was allocated using alloca() in
739 xcoff_relocate_symtab(). Now we need to have persistent object
740 and member names, so we should save them. */
742 filename = LDI_FILENAME (ldi, arch64);
743 mem = filename + strlen (filename) + 1;
745 objname = xstrdup (filename);
747 fd = LDI_FD (ldi, arch64);
749 /* Note that this opens it once for every member; a possible
750 enhancement would be to only open it once for every object. */
751 abfd = bfd_openr (objname, gnutarget);
753 abfd = bfd_fdopenr (objname, gnutarget, fd);
756 warning (_("Could not open `%s' as an executable file: %s"),
757 objname, bfd_errmsg (bfd_get_error ()));
761 /* Make sure we have an object file. */
763 if (bfd_check_format (abfd, bfd_object))
764 vp = map_vmap (abfd, 0);
766 else if (bfd_check_format (abfd, bfd_archive))
769 /* FIXME??? am I tossing BFDs? bfd? */
770 while ((last = bfd_openr_next_archived_file (abfd, last)))
771 if (strcmp (mem, last->filename) == 0)
776 warning (_("\"%s\": member \"%s\" missing."), objname, mem);
781 if (!bfd_check_format (last, bfd_object))
783 warning (_("\"%s\": member \"%s\" not in executable format: %s."),
784 objname, mem, bfd_errmsg (bfd_get_error ()));
790 vp = map_vmap (last, abfd);
794 warning (_("\"%s\": not in executable format: %s."),
795 objname, bfd_errmsg (bfd_get_error ()));
799 obj = allocate_objfile (vp->bfd, 0);
802 /* Always add symbols for the main objfile. */
803 if (vp == vmap || auto_solib_add)
804 vmap_add_symbols (vp);
808 /* update VMAP info with ldinfo() information
809 Input is ptr to ldinfo() results. */
812 vmap_ldinfo (LdInfo *ldi)
816 int got_one, retried;
817 int got_exec_file = 0;
819 int arch64 = ARCH64 ();
821 /* For each *ldi, see if we have a corresponding *vp.
822 If so, update the mapping, and symbol table.
823 If not, add an entry and symbol table. */
827 char *name = LDI_FILENAME (ldi, arch64);
828 char *memb = name + strlen (name) + 1;
829 int fd = LDI_FD (ldi, arch64);
833 if (fstat (fd, &ii) < 0)
835 /* The kernel sets ld_info to -1, if the process is still using the
836 object, and the object is removed. Keep the symbol info for the
837 removed object and issue a warning. */
838 warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
843 for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
845 struct objfile *objfile;
847 /* First try to find a `vp', which is the same as in ldinfo.
848 If not the same, just continue and grep the next `vp'. If same,
849 relocate its tstart, tend, dstart, dend values. If no such `vp'
850 found, get out of this for loop, add this ldi entry as a new vmap
851 (add_vmap) and come back, find its `vp' and so on... */
853 /* The filenames are not always sufficient to match on. */
855 if ((name[0] == '/' && strcmp (name, vp->name) != 0)
856 || (memb[0] && strcmp (memb, vp->member) != 0))
859 /* See if we are referring to the same file.
860 We have to check objfile->obfd, symfile.c:reread_symbols might
861 have updated the obfd after a change. */
862 objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
864 || objfile->obfd == NULL
865 || bfd_stat (objfile->obfd, &vi) < 0)
867 warning (_("Unable to stat %s, keeping its symbols"), name);
871 if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
879 /* Found a corresponding VMAP. Remap! */
881 vmap_secs (vp, ldi, arch64);
883 /* The objfile is only NULL for the exec file. */
884 if (vp->objfile == NULL)
887 /* relocate symbol table(s). */
890 /* Announce new object files. Doing this after symbol relocation
891 makes aix-thread.c's job easier. */
893 observer_notify_new_objfile (vp->objfile);
895 /* There may be more, so we don't break out of the loop. */
898 /* If there was no matching *vp, we must perforce create the
900 if (!got_one && !retried)
907 while ((next = LDI_NEXT (ldi, arch64))
908 && (ldi = (void *) (next + (char *) ldi)));
910 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
911 is unlikely that the symbol file is relocated to the proper
912 address. And we might have attached to a process which is
913 running a different copy of the same executable. */
914 if (symfile_objfile != NULL && !got_exec_file)
916 warning (_("Symbol file %s\nis not mapped; discarding it.\n\
917 If in fact that file has symbols which the mapped files listed by\n\
918 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
919 \"add-symbol-file\" commands (note that you must take care of relocating\n\
920 symbols to the proper address)."),
921 symfile_objfile->name);
922 free_objfile (symfile_objfile);
923 gdb_assert (symfile_objfile == NULL);
925 breakpoint_re_set ();
928 /* As well as symbol tables, exec_sections need relocation. After
929 the inferior process' termination, there will be a relocated symbol
930 table exist with no corresponding inferior process. At that time, we
931 need to use `exec' bfd, rather than the inferior process's memory space
934 `exec_sections' need to be relocated only once, as long as the exec
935 file remains unchanged. */
942 struct target_section_table *table = target_get_section_table (&exec_ops);
944 if (execbfd == exec_bfd)
949 if (!vmap || !table->sections)
950 error (_("vmap_exec: vmap or table->sections == 0."));
952 for (i = 0; &table->sections[i] < table->sections_end; i++)
954 if (strcmp (".text", table->sections[i].the_bfd_section->name) == 0)
956 table->sections[i].addr += vmap->tstart - vmap->tvma;
957 table->sections[i].endaddr += vmap->tstart - vmap->tvma;
959 else if (strcmp (".data", table->sections[i].the_bfd_section->name) == 0)
961 table->sections[i].addr += vmap->dstart - vmap->dvma;
962 table->sections[i].endaddr += vmap->dstart - vmap->dvma;
964 else if (strcmp (".bss", table->sections[i].the_bfd_section->name) == 0)
966 table->sections[i].addr += vmap->dstart - vmap->dvma;
967 table->sections[i].endaddr += vmap->dstart - vmap->dvma;
972 /* Set the current architecture from the host running GDB. Called when
973 starting a child process. */
975 static void (*super_create_inferior) (struct target_ops *,char *exec_file,
976 char *allargs, char **env, int from_tty);
978 rs6000_create_inferior (struct target_ops * ops, char *exec_file,
979 char *allargs, char **env, int from_tty)
981 enum bfd_architecture arch;
984 struct gdbarch_info info;
986 super_create_inferior (ops, exec_file, allargs, env, from_tty);
990 arch = bfd_arch_rs6000;
991 mach = bfd_mach_rs6k;
995 arch = bfd_arch_powerpc;
999 /* FIXME: schauer/2002-02-25:
1000 We don't know if we are executing a 32 or 64 bit executable,
1001 and have no way to pass the proper word size to rs6000_gdbarch_init.
1002 So we have to avoid switching to a new architecture, if the architecture
1004 Blindly calling rs6000_gdbarch_init used to work in older versions of
1005 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
1006 determine the wordsize. */
1009 const struct bfd_arch_info *exec_bfd_arch_info;
1011 exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
1012 if (arch == exec_bfd_arch_info->arch)
1016 bfd_default_set_arch_mach (&abfd, arch, mach);
1018 gdbarch_info_init (&info);
1019 info.bfd_arch_info = bfd_get_arch_info (&abfd);
1020 info.abfd = exec_bfd;
1022 if (!gdbarch_update_p (info))
1023 internal_error (__FILE__, __LINE__,
1024 _("rs6000_create_inferior: failed "
1025 "to select architecture"));
1029 /* xcoff_relocate_symtab - hook for symbol table relocation.
1031 This is only applicable to live processes, and is a no-op when
1032 debugging a core file. */
1035 xcoff_relocate_symtab (unsigned int pid)
1037 int load_segs = 64; /* number of load segments */
1040 int arch64 = ARCH64 ();
1041 int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
1044 /* Nothing to do if we are debugging a core file. */
1045 if (!target_has_execution)
1050 size = load_segs * ldisize;
1051 ldi = (void *) xrealloc (ldi, size);
1054 /* According to my humble theory, AIX has some timing problems and
1055 when the user stack grows, kernel doesn't update stack info in time
1056 and ptrace calls step on user stack. That is why we sleep here a
1057 little, and give kernel to update its internals. */
1062 rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
1064 rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
1068 if (errno == ENOMEM)
1071 perror_with_name (_("ptrace ldinfo"));
1076 vmap_exec (); /* relocate the exec and core sections as well. */
1083 /* Core file stuff. */
1085 /* Relocate symtabs and read in shared library info, based on symbols
1086 from the core file. */
1089 xcoff_relocate_core (struct target_ops *target)
1091 struct bfd_section *ldinfo_sec;
1095 int arch64 = ARCH64 ();
1097 /* Size of a struct ld_info except for the variable-length filename. */
1098 int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
1100 /* Allocated size of buffer. */
1101 int buffer_size = nonfilesz;
1102 char *buffer = xmalloc (buffer_size);
1103 struct cleanup *old = make_cleanup (free_current_contents, &buffer);
1105 ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
1106 if (ldinfo_sec == NULL)
1109 fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
1110 bfd_errmsg (bfd_get_error ()));
1117 int names_found = 0;
1119 /* Read in everything but the name. */
1120 if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
1121 offset, nonfilesz) == 0)
1128 if (i == buffer_size)
1131 buffer = xrealloc (buffer, buffer_size);
1133 if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
1134 offset + i, 1) == 0)
1136 if (buffer[i++] == '\0')
1139 while (names_found < 2);
1141 ldi = (LdInfo *) buffer;
1143 /* Can't use a file descriptor from the core file; need to open it. */
1145 ldi->l64.ldinfo_fd = -1;
1147 ldi->l32.ldinfo_fd = -1;
1149 /* The first ldinfo is for the exec file, allocated elsewhere. */
1150 if (offset == 0 && vmap != NULL)
1153 vp = add_vmap (ldi);
1155 /* Process next shared library upon error. */
1156 offset += LDI_NEXT (ldi, arch64);
1160 vmap_secs (vp, ldi, arch64);
1162 /* Unless this is the exec file,
1163 add our sections to the section table for the core target. */
1166 struct target_section *stp;
1168 stp = deprecated_core_resize_section_table (2);
1171 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
1172 stp->addr = vp->tstart;
1173 stp->endaddr = vp->tend;
1177 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
1178 stp->addr = vp->dstart;
1179 stp->endaddr = vp->dend;
1184 if (vp != vmap && vp->objfile)
1185 observer_notify_new_objfile (vp->objfile);
1187 while (LDI_NEXT (ldi, arch64) != 0);
1189 breakpoint_re_set ();
1193 /* Under AIX, we have to pass the correct TOC pointer to a function
1194 when calling functions in the inferior.
1195 We try to find the relative toc offset of the objfile containing PC
1196 and add the current load address of the data segment from the vmap. */
1199 find_toc_address (CORE_ADDR pc)
1203 for (vp = vmap; vp; vp = vp->nxt)
1205 if (pc >= vp->tstart && pc < vp->tend)
1207 /* vp->objfile is only NULL for the exec file. */
1208 return vp->dstart + xcoff_get_toc_offset (vp->objfile == NULL
1213 error (_("Unable to find TOC entry for pc %s."), hex_string (pc));
1218 _initialize_rs6000_nat (void)
1220 struct target_ops *t;
1222 t = inf_ptrace_target ();
1223 t->to_fetch_registers = rs6000_fetch_inferior_registers;
1224 t->to_store_registers = rs6000_store_inferior_registers;
1225 t->to_xfer_partial = rs6000_xfer_partial;
1227 super_create_inferior = t->to_create_inferior;
1228 t->to_create_inferior = rs6000_create_inferior;
1230 t->to_wait = rs6000_wait;
1234 /* Initialize hook in rs6000-tdep.c for determining the TOC address
1235 when calling functions in the inferior. */
1236 rs6000_find_toc_address_hook = find_toc_address;