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"
43 #include <sys/ptrace.h>
46 #include <sys/param.h>
50 #include <sys/ioctl.h>
58 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
59 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
61 #include <sys/systemcfg.h>
63 /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
64 debugging 32-bit and 64-bit processes. Define a typedef and macros for
65 accessing fields in the appropriate structures. */
67 /* In 32-bit compilation mode (which is the only mode from which ptrace()
68 works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
74 /* Return whether the current architecture is 64-bit. */
79 # define ARCH64() (register_size (current_gdbarch, 0) == 8)
82 /* Union of 32-bit and 64-bit ".reg" core file sections. */
86 struct __context64 r64;
93 /* Union of 32-bit and 64-bit versions of ld_info. */
100 struct __ld_info32 l32;
101 struct __ld_info64 l64;
105 /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
106 declare and initialize a variable named VAR suitable for use as the arch64
107 parameter to the various LDI_*() macros. */
110 # define ARCH64_DECL(var)
112 # define ARCH64_DECL(var) int var = ARCH64 ()
115 /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
116 otherwise. This technique only works for FIELDs with the same data type in
117 32-bit and 64-bit versions of ld_info. */
120 # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
122 # define LDI_FIELD(ldi, arch64, field) \
123 (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
126 /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
127 process otherwise. */
129 #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
130 #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
131 #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
133 extern struct vmap *map_vmap (bfd * bf, bfd * arch);
135 static void vmap_exec (void);
137 static void vmap_ldinfo (LdInfo *);
139 static struct vmap *add_vmap (LdInfo *);
141 static int objfile_symbol_add (void *);
143 static void vmap_symtab (struct vmap *);
145 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
147 static void exec_one_dummy_insn (void);
149 extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta);
151 /* Given REGNO, a gdb register number, return the corresponding
152 number suitable for use as a ptrace() parameter. Return -1 if
153 there's no suitable mapping. Also, set the int pointed to by
154 ISFLOAT to indicate whether REGNO is a floating point register. */
157 regmap (int regno, int *isfloat)
159 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
162 if (tdep->ppc_gp0_regnum <= regno
163 && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
165 else if (tdep->ppc_fp0_regnum >= 0
166 && tdep->ppc_fp0_regnum <= regno
167 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
170 return regno - tdep->ppc_fp0_regnum + FPR0;
172 else if (regno == PC_REGNUM)
174 else if (regno == tdep->ppc_ps_regnum)
176 else if (regno == tdep->ppc_cr_regnum)
178 else if (regno == tdep->ppc_lr_regnum)
180 else if (regno == tdep->ppc_ctr_regnum)
182 else if (regno == tdep->ppc_xer_regnum)
184 else if (tdep->ppc_fpscr_regnum >= 0
185 && regno == tdep->ppc_fpscr_regnum)
187 else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum)
193 /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
196 rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
198 int ret = ptrace (req, id, (int *)addr, data, buf);
200 printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
201 req, id, (unsigned int)addr, data, (unsigned int)buf, ret);
206 /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
209 rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf)
212 int ret = ptracex (req, id, addr, data, buf);
217 printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
218 req, id, addr, data, (unsigned int)buf, ret);
223 /* Fetch register REGNO from the inferior. */
226 fetch_register (int regno)
228 int addr[MAX_REGISTER_SIZE];
231 /* Retrieved values may be -1, so infer errors from errno. */
234 nr = regmap (regno, &isfloat);
236 /* Floating-point registers. */
238 rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0);
240 /* Bogus register number. */
243 if (regno >= NUM_REGS)
244 fprintf_unfiltered (gdb_stderr,
245 "gdb error: register no %d not implemented.\n",
250 /* Fixed-point registers. */
254 *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0);
257 /* PT_READ_GPR requires the buffer parameter to point to long long,
258 even if the register is really only 32 bits. */
260 rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
261 if (register_size (current_gdbarch, regno) == 8)
262 memcpy (addr, &buf, 8);
269 regcache_raw_supply (current_regcache, regno, (char *) addr);
273 /* FIXME: this happens 3 times at the start of each 64-bit program. */
274 perror ("ptrace read");
280 /* Store register REGNO back into the inferior. */
283 store_register (int regno)
285 int addr[MAX_REGISTER_SIZE];
288 /* Fetch the register's value from the register cache. */
289 regcache_raw_collect (current_regcache, regno, addr);
291 /* -1 can be a successful return value, so infer errors from errno. */
294 nr = regmap (regno, &isfloat);
296 /* Floating-point registers. */
298 rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0);
300 /* Bogus register number. */
303 if (regno >= NUM_REGS)
304 fprintf_unfiltered (gdb_stderr,
305 "gdb error: register no %d not implemented.\n",
309 /* Fixed-point registers. */
312 if (regno == SP_REGNUM)
313 /* Execute one dummy instruction (which is a breakpoint) in inferior
314 process to give kernel a chance to do internal housekeeping.
315 Otherwise the following ptrace(2) calls will mess up user stack
316 since kernel will get confused about the bottom of the stack
318 exec_one_dummy_insn ();
320 /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors,
321 the register's value is passed by value, but for 64-bit inferiors,
322 the address of a buffer containing the value is passed. */
324 rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0);
327 /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
328 area, even if the register is really only 32 bits. */
330 if (register_size (current_gdbarch, regno) == 8)
331 memcpy (&buf, addr, 8);
334 rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
340 perror ("ptrace write");
345 /* Read from the inferior all registers if REGNO == -1 and just register
349 rs6000_fetch_inferior_registers (int regno)
352 fetch_register (regno);
356 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
358 /* Read 32 general purpose registers. */
359 for (regno = tdep->ppc_gp0_regnum;
360 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
363 fetch_register (regno);
366 /* Read general purpose floating point registers. */
367 if (tdep->ppc_fp0_regnum >= 0)
368 for (regno = 0; regno < ppc_num_fprs; regno++)
369 fetch_register (tdep->ppc_fp0_regnum + regno);
371 /* Read special registers. */
372 fetch_register (PC_REGNUM);
373 fetch_register (tdep->ppc_ps_regnum);
374 fetch_register (tdep->ppc_cr_regnum);
375 fetch_register (tdep->ppc_lr_regnum);
376 fetch_register (tdep->ppc_ctr_regnum);
377 fetch_register (tdep->ppc_xer_regnum);
378 if (tdep->ppc_fpscr_regnum >= 0)
379 fetch_register (tdep->ppc_fpscr_regnum);
380 if (tdep->ppc_mq_regnum >= 0)
381 fetch_register (tdep->ppc_mq_regnum);
385 /* Store our register values back into the inferior.
386 If REGNO is -1, do this for all registers.
387 Otherwise, REGNO specifies which register (so we can save time). */
390 rs6000_store_inferior_registers (int regno)
393 store_register (regno);
397 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
399 /* Write general purpose registers first. */
400 for (regno = tdep->ppc_gp0_regnum;
401 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
404 store_register (regno);
407 /* Write floating point registers. */
408 if (tdep->ppc_fp0_regnum >= 0)
409 for (regno = 0; regno < ppc_num_fprs; regno++)
410 store_register (tdep->ppc_fp0_regnum + regno);
412 /* Write special registers. */
413 store_register (PC_REGNUM);
414 store_register (tdep->ppc_ps_regnum);
415 store_register (tdep->ppc_cr_regnum);
416 store_register (tdep->ppc_lr_regnum);
417 store_register (tdep->ppc_ctr_regnum);
418 store_register (tdep->ppc_xer_regnum);
419 if (tdep->ppc_fpscr_regnum >= 0)
420 store_register (tdep->ppc_fpscr_regnum);
421 if (tdep->ppc_mq_regnum >= 0)
422 store_register (tdep->ppc_mq_regnum);
427 /* Attempt a transfer all LEN bytes starting at OFFSET between the
428 inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
429 Return the number of bytes actually transferred. */
432 rs6000_xfer_partial (struct target_ops *ops, enum target_object object,
433 const char *annex, gdb_byte *readbuf,
434 const gdb_byte *writebuf,
435 ULONGEST offset, LONGEST len)
437 pid_t pid = ptid_get_pid (inferior_ptid);
438 int arch64 = ARCH64 ();
442 case TARGET_OBJECT_MEMORY:
446 PTRACE_TYPE_RET word;
447 gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
449 ULONGEST rounded_offset;
452 /* Round the start offset down to the next long word
454 rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
456 /* Since ptrace will transfer a single word starting at that
457 rounded_offset the partial_len needs to be adjusted down to
458 that (remember this function only does a single transfer).
459 Should the required length be even less, adjust it down
461 partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
462 if (partial_len > len)
467 /* If OFFSET:PARTIAL_LEN is smaller than
468 ROUNDED_OFFSET:WORDSIZE then a read/modify write will
469 be needed. Read in the entire word. */
470 if (rounded_offset < offset
471 || (offset + partial_len
472 < rounded_offset + sizeof (PTRACE_TYPE_RET)))
474 /* Need part of initial word -- fetch it. */
476 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
477 rounded_offset, 0, NULL);
479 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
480 (int *)(uintptr_t)rounded_offset,
484 /* Copy data to be written over corresponding part of
486 memcpy (buffer.byte + (offset - rounded_offset),
487 writebuf, partial_len);
491 rs6000_ptrace64 (PT_WRITE_D, pid,
492 rounded_offset, buffer.word, NULL);
494 rs6000_ptrace32 (PT_WRITE_D, pid,
495 (int *)(uintptr_t)rounded_offset, buffer.word, NULL);
504 buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
505 rounded_offset, 0, NULL);
507 buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
508 (int *)(uintptr_t)rounded_offset,
513 /* Copy appropriate bytes out of the buffer. */
514 memcpy (readbuf, buffer.byte + (offset - rounded_offset),
527 /* Execute one dummy breakpoint instruction. This way we give the kernel
528 a chance to do some housekeeping and update inferior's internal data,
532 exec_one_dummy_insn (void)
534 #define DUMMY_INSN_ADDR gdbarch_tdep (current_gdbarch)->text_segment_base+0x200
536 int ret, status, pid;
540 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
541 assume that this address will never be executed again by the real
544 bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR);
546 /* You might think this could be done with a single ptrace call, and
547 you'd be correct for just about every platform I've ever worked
548 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
549 the inferior never hits the breakpoint (it's also worth noting
550 powerpc-ibm-aix4.1.3 works correctly). */
551 prev_pc = read_pc ();
552 write_pc (DUMMY_INSN_ADDR);
554 ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
556 ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL);
559 perror ("pt_continue");
563 pid = wait (&status);
565 while (pid != PIDGET (inferior_ptid));
568 deprecated_remove_raw_breakpoint (bp);
571 /* Fetch registers from the register section in core bfd. */
574 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
575 int which, CORE_ADDR reg_addr)
579 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
585 "Gdb error: unknown parameter to fetch_core_registers().\n");
589 regs = (CoreRegs *) core_reg_sect;
591 /* Put the register values from the core file section in the regcache. */
595 for (regi = 0; regi < ppc_num_gprs; regi++)
596 regcache_raw_supply (current_regcache, tdep->ppc_gp0_regnum + regi,
597 (char *) ®s->r64.gpr[regi]);
599 if (tdep->ppc_fp0_regnum >= 0)
600 for (regi = 0; regi < ppc_num_fprs; regi++)
601 regcache_raw_supply (current_regcache, tdep->ppc_fp0_regnum + regi,
602 (char *) ®s->r64.fpr[regi]);
604 regcache_raw_supply (current_regcache, PC_REGNUM,
605 (char *) ®s->r64.iar);
606 regcache_raw_supply (current_regcache, tdep->ppc_ps_regnum,
607 (char *) ®s->r64.msr);
608 regcache_raw_supply (current_regcache, tdep->ppc_cr_regnum,
609 (char *) ®s->r64.cr);
610 regcache_raw_supply (current_regcache, tdep->ppc_lr_regnum,
611 (char *) ®s->r64.lr);
612 regcache_raw_supply (current_regcache, tdep->ppc_ctr_regnum,
613 (char *) ®s->r64.ctr);
614 regcache_raw_supply (current_regcache, tdep->ppc_xer_regnum,
615 (char *) ®s->r64.xer);
616 if (tdep->ppc_fpscr_regnum >= 0)
617 regcache_raw_supply (current_regcache, tdep->ppc_fpscr_regnum,
618 (char *) ®s->r64.fpscr);
622 for (regi = 0; regi < ppc_num_gprs; regi++)
623 regcache_raw_supply (current_regcache, tdep->ppc_gp0_regnum + regi,
624 (char *) ®s->r32.gpr[regi]);
626 if (tdep->ppc_fp0_regnum >= 0)
627 for (regi = 0; regi < ppc_num_fprs; regi++)
628 regcache_raw_supply (current_regcache, tdep->ppc_fp0_regnum + regi,
629 (char *) ®s->r32.fpr[regi]);
631 regcache_raw_supply (current_regcache, PC_REGNUM,
632 (char *) ®s->r32.iar);
633 regcache_raw_supply (current_regcache, tdep->ppc_ps_regnum,
634 (char *) ®s->r32.msr);
635 regcache_raw_supply (current_regcache, tdep->ppc_cr_regnum,
636 (char *) ®s->r32.cr);
637 regcache_raw_supply (current_regcache, tdep->ppc_lr_regnum,
638 (char *) ®s->r32.lr);
639 regcache_raw_supply (current_regcache, tdep->ppc_ctr_regnum,
640 (char *) ®s->r32.ctr);
641 regcache_raw_supply (current_regcache, tdep->ppc_xer_regnum,
642 (char *) ®s->r32.xer);
643 if (tdep->ppc_fpscr_regnum >= 0)
644 regcache_raw_supply (current_regcache, tdep->ppc_fpscr_regnum,
645 (char *) ®s->r32.fpscr);
646 if (tdep->ppc_mq_regnum >= 0)
647 regcache_raw_supply (current_regcache, tdep->ppc_mq_regnum,
648 (char *) ®s->r32.mq);
653 /* Copy information about text and data sections from LDI to VP for a 64-bit
654 process if ARCH64 and for a 32-bit process otherwise. */
657 vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
661 vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
662 vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
663 vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
664 vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
668 vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
669 vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
670 vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
671 vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
674 /* The run time loader maps the file header in addition to the text
675 section and returns a pointer to the header in ldinfo_textorg.
676 Adjust the text start address to point to the real start address
677 of the text section. */
678 vp->tstart += vp->toffs;
681 /* handle symbol translation on vmapping */
684 vmap_symtab (struct vmap *vp)
686 struct objfile *objfile;
687 struct section_offsets *new_offsets;
690 objfile = vp->objfile;
693 /* OK, it's not an objfile we opened ourselves.
694 Currently, that can only happen with the exec file, so
695 relocate the symbols for the symfile. */
696 if (symfile_objfile == NULL)
698 objfile = symfile_objfile;
700 else if (!vp->loaded)
701 /* If symbols are not yet loaded, offsets are not yet valid. */
705 (struct section_offsets *)
706 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
708 for (i = 0; i < objfile->num_sections; ++i)
709 new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
711 /* The symbols in the object file are linked to the VMA of the section,
712 relocate them VMA relative. */
713 new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
714 new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
715 new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
717 objfile_relocate (objfile, new_offsets);
720 /* Add symbols for an objfile. */
723 objfile_symbol_add (void *arg)
725 struct objfile *obj = (struct objfile *) arg;
727 syms_from_objfile (obj, NULL, 0, 0, 0, 0);
728 new_symfile_objfile (obj, 0, 0);
732 /* Add symbols for a vmap. Return zero upon error. */
735 vmap_add_symbols (struct vmap *vp)
737 if (catch_errors (objfile_symbol_add, vp->objfile,
738 "Error while reading shared library symbols:\n",
741 /* Note this is only done if symbol reading was successful. */
749 /* Add a new vmap entry based on ldinfo() information.
751 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
752 core file), the caller should set it to -1, and we will open the file.
754 Return the vmap new entry. */
757 add_vmap (LdInfo *ldi)
760 char *mem, *objname, *filename;
764 ARCH64_DECL (arch64);
766 /* This ldi structure was allocated using alloca() in
767 xcoff_relocate_symtab(). Now we need to have persistent object
768 and member names, so we should save them. */
770 filename = LDI_FILENAME (ldi, arch64);
771 mem = filename + strlen (filename) + 1;
772 mem = savestring (mem, strlen (mem));
773 objname = savestring (filename, strlen (filename));
775 fd = LDI_FD (ldi, arch64);
777 /* Note that this opens it once for every member; a possible
778 enhancement would be to only open it once for every object. */
779 abfd = bfd_openr (objname, gnutarget);
781 abfd = bfd_fdopenr (objname, gnutarget, fd);
784 warning (_("Could not open `%s' as an executable file: %s"),
785 objname, bfd_errmsg (bfd_get_error ()));
789 /* make sure we have an object file */
791 if (bfd_check_format (abfd, bfd_object))
792 vp = map_vmap (abfd, 0);
794 else if (bfd_check_format (abfd, bfd_archive))
797 /* FIXME??? am I tossing BFDs? bfd? */
798 while ((last = bfd_openr_next_archived_file (abfd, last)))
799 if (DEPRECATED_STREQ (mem, last->filename))
804 warning (_("\"%s\": member \"%s\" missing."), objname, mem);
809 if (!bfd_check_format (last, bfd_object))
811 warning (_("\"%s\": member \"%s\" not in executable format: %s."),
812 objname, mem, bfd_errmsg (bfd_get_error ()));
818 vp = map_vmap (last, abfd);
822 warning (_("\"%s\": not in executable format: %s."),
823 objname, bfd_errmsg (bfd_get_error ()));
827 obj = allocate_objfile (vp->bfd, 0);
830 /* Always add symbols for the main objfile. */
831 if (vp == vmap || auto_solib_add)
832 vmap_add_symbols (vp);
836 /* update VMAP info with ldinfo() information
837 Input is ptr to ldinfo() results. */
840 vmap_ldinfo (LdInfo *ldi)
844 int got_one, retried;
845 int got_exec_file = 0;
847 int arch64 = ARCH64 ();
849 /* For each *ldi, see if we have a corresponding *vp.
850 If so, update the mapping, and symbol table.
851 If not, add an entry and symbol table. */
855 char *name = LDI_FILENAME (ldi, arch64);
856 char *memb = name + strlen (name) + 1;
857 int fd = LDI_FD (ldi, arch64);
861 if (fstat (fd, &ii) < 0)
863 /* The kernel sets ld_info to -1, if the process is still using the
864 object, and the object is removed. Keep the symbol info for the
865 removed object and issue a warning. */
866 warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
871 for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
873 struct objfile *objfile;
875 /* First try to find a `vp', which is the same as in ldinfo.
876 If not the same, just continue and grep the next `vp'. If same,
877 relocate its tstart, tend, dstart, dend values. If no such `vp'
878 found, get out of this for loop, add this ldi entry as a new vmap
879 (add_vmap) and come back, find its `vp' and so on... */
881 /* The filenames are not always sufficient to match on. */
883 if ((name[0] == '/' && !DEPRECATED_STREQ (name, vp->name))
884 || (memb[0] && !DEPRECATED_STREQ (memb, vp->member)))
887 /* See if we are referring to the same file.
888 We have to check objfile->obfd, symfile.c:reread_symbols might
889 have updated the obfd after a change. */
890 objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
892 || objfile->obfd == NULL
893 || bfd_stat (objfile->obfd, &vi) < 0)
895 warning (_("Unable to stat %s, keeping its symbols"), name);
899 if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
907 /* Found a corresponding VMAP. Remap! */
909 vmap_secs (vp, ldi, arch64);
911 /* The objfile is only NULL for the exec file. */
912 if (vp->objfile == NULL)
915 /* relocate symbol table(s). */
918 /* Announce new object files. Doing this after symbol relocation
919 makes aix-thread.c's job easier. */
920 if (deprecated_target_new_objfile_hook && vp->objfile)
921 deprecated_target_new_objfile_hook (vp->objfile);
923 /* There may be more, so we don't break out of the loop. */
926 /* if there was no matching *vp, we must perforce create the sucker(s) */
927 if (!got_one && !retried)
934 while ((next = LDI_NEXT (ldi, arch64))
935 && (ldi = (void *) (next + (char *) ldi)));
937 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
938 is unlikely that the symbol file is relocated to the proper
939 address. And we might have attached to a process which is
940 running a different copy of the same executable. */
941 if (symfile_objfile != NULL && !got_exec_file)
943 warning (_("Symbol file %s\nis not mapped; discarding it.\n\
944 If in fact that file has symbols which the mapped files listed by\n\
945 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
946 \"add-symbol-file\" commands (note that you must take care of relocating\n\
947 symbols to the proper address)."),
948 symfile_objfile->name);
949 free_objfile (symfile_objfile);
950 symfile_objfile = NULL;
952 breakpoint_re_set ();
955 /* As well as symbol tables, exec_sections need relocation. After
956 the inferior process' termination, there will be a relocated symbol
957 table exist with no corresponding inferior process. At that time, we
958 need to use `exec' bfd, rather than the inferior process's memory space
961 `exec_sections' need to be relocated only once, as long as the exec
962 file remains unchanged.
971 if (execbfd == exec_bfd)
976 if (!vmap || !exec_ops.to_sections)
977 error (_("vmap_exec: vmap or exec_ops.to_sections == 0."));
979 for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
981 if (DEPRECATED_STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name))
983 exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
984 exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
986 else if (DEPRECATED_STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name))
988 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
989 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
991 else if (DEPRECATED_STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name))
993 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
994 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
999 /* Set the current architecture from the host running GDB. Called when
1000 starting a child process. */
1002 static void (*super_create_inferior) (char *exec_file, char *allargs,
1003 char **env, int from_tty);
1005 rs6000_create_inferior (char *exec_file, char *allargs, char **env, int from_tty)
1007 enum bfd_architecture arch;
1010 struct gdbarch_info info;
1012 super_create_inferior (exec_file, allargs, env, from_tty);
1016 arch = bfd_arch_rs6000;
1017 mach = bfd_mach_rs6k;
1021 arch = bfd_arch_powerpc;
1022 mach = bfd_mach_ppc;
1025 /* FIXME: schauer/2002-02-25:
1026 We don't know if we are executing a 32 or 64 bit executable,
1027 and have no way to pass the proper word size to rs6000_gdbarch_init.
1028 So we have to avoid switching to a new architecture, if the architecture
1030 Blindly calling rs6000_gdbarch_init used to work in older versions of
1031 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
1032 determine the wordsize. */
1035 const struct bfd_arch_info *exec_bfd_arch_info;
1037 exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
1038 if (arch == exec_bfd_arch_info->arch)
1042 bfd_default_set_arch_mach (&abfd, arch, mach);
1044 gdbarch_info_init (&info);
1045 info.bfd_arch_info = bfd_get_arch_info (&abfd);
1046 info.abfd = exec_bfd;
1048 if (!gdbarch_update_p (info))
1049 internal_error (__FILE__, __LINE__,
1050 _("rs6000_create_inferior: failed to select architecture"));
1054 /* xcoff_relocate_symtab - hook for symbol table relocation.
1055 also reads shared libraries. */
1058 xcoff_relocate_symtab (unsigned int pid)
1060 int load_segs = 64; /* number of load segments */
1063 int arch64 = ARCH64 ();
1064 int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
1069 size = load_segs * ldisize;
1070 ldi = (void *) xrealloc (ldi, size);
1073 /* According to my humble theory, AIX has some timing problems and
1074 when the user stack grows, kernel doesn't update stack info in time
1075 and ptrace calls step on user stack. That is why we sleep here a
1076 little, and give kernel to update its internals. */
1081 rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
1083 rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
1087 if (errno == ENOMEM)
1090 perror_with_name (_("ptrace ldinfo"));
1095 vmap_exec (); /* relocate the exec and core sections as well. */
1102 /* Core file stuff. */
1104 /* Relocate symtabs and read in shared library info, based on symbols
1105 from the core file. */
1108 xcoff_relocate_core (struct target_ops *target)
1110 struct bfd_section *ldinfo_sec;
1114 int arch64 = ARCH64 ();
1116 /* Size of a struct ld_info except for the variable-length filename. */
1117 int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
1119 /* Allocated size of buffer. */
1120 int buffer_size = nonfilesz;
1121 char *buffer = xmalloc (buffer_size);
1122 struct cleanup *old = make_cleanup (free_current_contents, &buffer);
1124 ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
1125 if (ldinfo_sec == NULL)
1128 fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
1129 bfd_errmsg (bfd_get_error ()));
1136 int names_found = 0;
1138 /* Read in everything but the name. */
1139 if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
1140 offset, nonfilesz) == 0)
1147 if (i == buffer_size)
1150 buffer = xrealloc (buffer, buffer_size);
1152 if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
1153 offset + i, 1) == 0)
1155 if (buffer[i++] == '\0')
1158 while (names_found < 2);
1160 ldi = (LdInfo *) buffer;
1162 /* Can't use a file descriptor from the core file; need to open it. */
1164 ldi->l64.ldinfo_fd = -1;
1166 ldi->l32.ldinfo_fd = -1;
1168 /* The first ldinfo is for the exec file, allocated elsewhere. */
1169 if (offset == 0 && vmap != NULL)
1172 vp = add_vmap (ldi);
1174 /* Process next shared library upon error. */
1175 offset += LDI_NEXT (ldi, arch64);
1179 vmap_secs (vp, ldi, arch64);
1181 /* Unless this is the exec file,
1182 add our sections to the section table for the core target. */
1185 struct section_table *stp;
1187 target_resize_to_sections (target, 2);
1188 stp = target->to_sections_end - 2;
1191 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
1192 stp->addr = vp->tstart;
1193 stp->endaddr = vp->tend;
1197 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
1198 stp->addr = vp->dstart;
1199 stp->endaddr = vp->dend;
1204 if (deprecated_target_new_objfile_hook && vp != vmap && vp->objfile)
1205 deprecated_target_new_objfile_hook (vp->objfile);
1207 while (LDI_NEXT (ldi, arch64) != 0);
1209 breakpoint_re_set ();
1213 /* Under AIX, we have to pass the correct TOC pointer to a function
1214 when calling functions in the inferior.
1215 We try to find the relative toc offset of the objfile containing PC
1216 and add the current load address of the data segment from the vmap. */
1219 find_toc_address (CORE_ADDR pc)
1222 extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */
1224 for (vp = vmap; vp; vp = vp->nxt)
1226 if (pc >= vp->tstart && pc < vp->tend)
1228 /* vp->objfile is only NULL for the exec file. */
1229 return vp->dstart + get_toc_offset (vp->objfile == NULL
1234 error (_("Unable to find TOC entry for pc %s."), hex_string (pc));
1237 /* Register that we are able to handle rs6000 core file formats. */
1239 static struct core_fns rs6000_core_fns =
1241 bfd_target_xcoff_flavour, /* core_flavour */
1242 default_check_format, /* check_format */
1243 default_core_sniffer, /* core_sniffer */
1244 fetch_core_registers, /* core_read_registers */
1249 _initialize_core_rs6000 (void)
1251 struct target_ops *t;
1253 t = inf_ptrace_target ();
1254 t->to_fetch_registers = rs6000_fetch_inferior_registers;
1255 t->to_store_registers = rs6000_store_inferior_registers;
1256 t->to_xfer_partial = rs6000_xfer_partial;
1258 super_create_inferior = t->to_create_inferior;
1259 t->to_create_inferior = rs6000_create_inferior;
1263 /* Initialize hook in rs6000-tdep.c for determining the TOC address
1264 when calling functions in the inferior. */
1265 rs6000_find_toc_address_hook = find_toc_address;
1267 deprecated_add_core_fns (&rs6000_core_fns);