1 /* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
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., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "xcoffsolib.h"
31 #include "libbfd.h" /* For bfd_cache_lookup (FIXME) */
33 #include "gdb-stabs.h"
35 #include "arch-utils.h"
36 #include "language.h" /* for local_hex_string(). */
40 #include <sys/ptrace.h>
43 #include <sys/param.h>
47 #include <sys/ioctl.h>
55 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
56 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
58 #include <sys/systemcfg.h>
60 /* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
61 debugging 32-bit and 64-bit processes. Define a typedef and macros for
62 accessing fields in the appropriate structures. */
64 /* In 32-bit compilation mode (which is the only mode from which ptrace()
65 works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
71 /* Return whether the current architecture is 64-bit. */
76 # define ARCH64() (DEPRECATED_REGISTER_RAW_SIZE (0) == 8)
79 /* Union of 32-bit and 64-bit ".reg" core file sections. */
83 struct __context64 r64;
90 /* Union of 32-bit and 64-bit versions of ld_info. */
97 struct __ld_info32 l32;
98 struct __ld_info64 l64;
102 /* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
103 declare and initialize a variable named VAR suitable for use as the arch64
104 parameter to the various LDI_*() macros. */
107 # define ARCH64_DECL(var)
109 # define ARCH64_DECL(var) int var = ARCH64 ()
112 /* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
113 otherwise. This technique only works for FIELDs with the same data type in
114 32-bit and 64-bit versions of ld_info. */
117 # define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
119 # define LDI_FIELD(ldi, arch64, field) \
120 (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
123 /* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
124 process otherwise. */
126 #define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
127 #define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
128 #define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
130 extern struct vmap *map_vmap (bfd * bf, bfd * arch);
132 static void vmap_exec (void);
134 static void vmap_ldinfo (LdInfo *);
136 static struct vmap *add_vmap (LdInfo *);
138 static int objfile_symbol_add (void *);
140 static void vmap_symtab (struct vmap *);
142 static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR);
144 static void exec_one_dummy_insn (void);
146 extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta);
148 /* Given REGNO, a gdb register number, return the corresponding
149 number suitable for use as a ptrace() parameter. Return -1 if
150 there's no suitable mapping. Also, set the int pointed to by
151 ISFLOAT to indicate whether REGNO is a floating point register. */
154 regmap (int regno, int *isfloat)
156 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
159 if (tdep->ppc_gp0_regnum <= regno
160 && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
162 else if (tdep->ppc_fp0_regnum >= 0
163 && tdep->ppc_fp0_regnum <= regno
164 && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
167 return regno - tdep->ppc_fp0_regnum + FPR0;
169 else if (regno == PC_REGNUM)
171 else if (regno == tdep->ppc_ps_regnum)
173 else if (regno == tdep->ppc_cr_regnum)
175 else if (regno == tdep->ppc_lr_regnum)
177 else if (regno == tdep->ppc_ctr_regnum)
179 else if (regno == tdep->ppc_xer_regnum)
181 else if (tdep->ppc_fpscr_regnum >= 0
182 && regno == tdep->ppc_fpscr_regnum)
184 else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum)
190 /* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
193 rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
195 int ret = ptrace (req, id, (int *)addr, data, buf);
197 printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
198 req, id, (unsigned int)addr, data, (unsigned int)buf, ret);
203 /* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
206 rs6000_ptrace64 (int req, int id, long long addr, int data, int *buf)
209 int ret = ptracex (req, id, addr, data, buf);
214 printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
215 req, id, addr, data, (unsigned int)buf, ret);
220 /* Fetch register REGNO from the inferior. */
223 fetch_register (int regno)
225 int addr[MAX_REGISTER_SIZE];
228 /* Retrieved values may be -1, so infer errors from errno. */
231 nr = regmap (regno, &isfloat);
233 /* Floating-point registers. */
235 rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0);
237 /* Bogus register number. */
240 if (regno >= NUM_REGS)
241 fprintf_unfiltered (gdb_stderr,
242 "gdb error: register no %d not implemented.\n",
247 /* Fixed-point registers. */
251 *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0);
254 /* PT_READ_GPR requires the buffer parameter to point to long long,
255 even if the register is really only 32 bits. */
257 rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf);
258 if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 8)
259 memcpy (addr, &buf, 8);
266 supply_register (regno, (char *) addr);
270 /* FIXME: this happens 3 times at the start of each 64-bit program. */
271 perror ("ptrace read");
277 /* Store register REGNO back into the inferior. */
280 store_register (int regno)
282 int addr[MAX_REGISTER_SIZE];
285 /* Fetch the register's value from the register cache. */
286 regcache_collect (regno, addr);
288 /* -1 can be a successful return value, so infer errors from errno. */
291 nr = regmap (regno, &isfloat);
293 /* Floating-point registers. */
295 rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0);
297 /* Bogus register number. */
300 if (regno >= NUM_REGS)
301 fprintf_unfiltered (gdb_stderr,
302 "gdb error: register no %d not implemented.\n",
306 /* Fixed-point registers. */
309 if (regno == SP_REGNUM)
310 /* Execute one dummy instruction (which is a breakpoint) in inferior
311 process to give kernel a chance to do internal housekeeping.
312 Otherwise the following ptrace(2) calls will mess up user stack
313 since kernel will get confused about the bottom of the stack
315 exec_one_dummy_insn ();
317 /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors,
318 the register's value is passed by value, but for 64-bit inferiors,
319 the address of a buffer containing the value is passed. */
321 rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0);
324 /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
325 area, even if the register is really only 32 bits. */
327 if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 8)
328 memcpy (&buf, addr, 8);
331 rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, (int *)&buf);
337 perror ("ptrace write");
342 /* Read from the inferior all registers if REGNO == -1 and just register
346 fetch_inferior_registers (int regno)
349 fetch_register (regno);
353 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
355 /* Read 32 general purpose registers. */
356 for (regno = tdep->ppc_gp0_regnum;
357 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
360 fetch_register (regno);
363 /* Read general purpose floating point registers. */
364 if (tdep->ppc_fp0_regnum >= 0)
365 for (regno = 0; regno < ppc_num_fprs; regno++)
366 fetch_register (tdep->ppc_fp0_regnum + regno);
368 /* Read special registers. */
369 fetch_register (PC_REGNUM);
370 fetch_register (tdep->ppc_ps_regnum);
371 fetch_register (tdep->ppc_cr_regnum);
372 fetch_register (tdep->ppc_lr_regnum);
373 fetch_register (tdep->ppc_ctr_regnum);
374 fetch_register (tdep->ppc_xer_regnum);
375 if (tdep->ppc_fpscr_regnum >= 0)
376 fetch_register (tdep->ppc_fpscr_regnum);
377 if (tdep->ppc_mq_regnum >= 0)
378 fetch_register (tdep->ppc_mq_regnum);
382 /* Store our register values back into the inferior.
383 If REGNO is -1, do this for all registers.
384 Otherwise, REGNO specifies which register (so we can save time). */
387 store_inferior_registers (int regno)
390 store_register (regno);
394 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
396 /* Write general purpose registers first. */
397 for (regno = tdep->ppc_gp0_regnum;
398 regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
401 store_register (regno);
404 /* Write floating point registers. */
405 if (tdep->ppc_fp0_regnum >= 0)
406 for (regno = 0; regno < ppc_num_fprs; regno++)
407 store_register (tdep->ppc_fp0_regnum + regno);
409 /* Write special registers. */
410 store_register (PC_REGNUM);
411 store_register (tdep->ppc_ps_regnum);
412 store_register (tdep->ppc_cr_regnum);
413 store_register (tdep->ppc_lr_regnum);
414 store_register (tdep->ppc_ctr_regnum);
415 store_register (tdep->ppc_xer_regnum);
416 if (tdep->ppc_fpscr_regnum >= 0)
417 store_register (tdep->ppc_fpscr_regnum);
418 if (tdep->ppc_mq_regnum >= 0)
419 store_register (tdep->ppc_mq_regnum);
423 /* Store in *TO the 32-bit word at 32-bit-aligned ADDR in the child
424 process, which is 64-bit if ARCH64 and 32-bit otherwise. Return
428 read_word (CORE_ADDR from, int *to, int arch64)
430 /* Retrieved values may be -1, so infer errors from errno. */
434 *to = rs6000_ptrace64 (PT_READ_I, PIDGET (inferior_ptid), from, 0, NULL);
436 *to = rs6000_ptrace32 (PT_READ_I, PIDGET (inferior_ptid), (int *)(long) from,
442 /* Copy LEN bytes to or from inferior's memory starting at MEMADDR
443 to debugger memory starting at MYADDR. Copy to inferior if
446 Returns the length copied, which is either the LEN argument or zero.
447 This xfer function does not do partial moves, since child_ops
448 doesn't allow memory operations to cross below us in the target stack
452 child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len,
453 int write, struct mem_attrib *attrib,
454 struct target_ops *target)
456 /* Round starting address down to 32-bit word boundary. */
457 int mask = sizeof (int) - 1;
458 CORE_ADDR addr = memaddr & ~(CORE_ADDR)mask;
460 /* Round ending address up to 32-bit word boundary. */
461 int count = ((memaddr + len - addr + mask) & ~(CORE_ADDR)mask)
464 /* Allocate word transfer buffer. */
465 /* FIXME (alloca): This code, cloned from infptrace.c, is unsafe
466 because it uses alloca to allocate a buffer of arbitrary size.
467 For very large xfers, this could crash GDB's stack. */
468 int *buf = (int *) alloca (count * sizeof (int));
470 int arch64 = ARCH64 ();
475 /* Retrieve memory a word at a time. */
476 for (i = 0; i < count; i++, addr += sizeof (int))
478 if (!read_word (addr, buf + i, arch64))
483 /* Copy memory to supplied buffer. */
484 addr -= count * sizeof (int);
485 memcpy (myaddr, (char *)buf + (memaddr - addr), len);
489 /* Fetch leading memory needed for alignment. */
491 if (!read_word (addr, buf, arch64))
494 /* Fetch trailing memory needed for alignment. */
495 if (addr + count * sizeof (int) > memaddr + len)
496 if (!read_word (addr + (count - 1) * sizeof (int),
497 buf + count - 1, arch64))
500 /* Copy supplied data into memory buffer. */
501 memcpy ((char *)buf + (memaddr - addr), myaddr, len);
503 /* Store memory one word at a time. */
504 for (i = 0, errno = 0; i < count; i++, addr += sizeof (int))
507 rs6000_ptrace64 (PT_WRITE_D, PIDGET (inferior_ptid), addr, buf[i], NULL);
509 rs6000_ptrace32 (PT_WRITE_D, PIDGET (inferior_ptid), (int *)(long) addr,
521 /* Execute one dummy breakpoint instruction. This way we give the kernel
522 a chance to do some housekeeping and update inferior's internal data,
526 exec_one_dummy_insn (void)
528 #define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
530 char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
531 int ret, status, pid;
534 /* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
535 assume that this address will never be executed again by the real
538 target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents);
540 /* You might think this could be done with a single ptrace call, and
541 you'd be correct for just about every platform I've ever worked
542 on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
543 the inferior never hits the breakpoint (it's also worth noting
544 powerpc-ibm-aix4.1.3 works correctly). */
545 prev_pc = read_pc ();
546 write_pc (DUMMY_INSN_ADDR);
548 ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
550 ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL);
553 perror ("pt_continue");
557 pid = wait (&status);
559 while (pid != PIDGET (inferior_ptid));
562 target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents);
565 /* Fetch registers from the register section in core bfd. */
568 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
569 int which, CORE_ADDR reg_addr)
573 struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
579 "Gdb error: unknown parameter to fetch_core_registers().\n");
583 regs = (CoreRegs *) core_reg_sect;
585 /* Put the register values from the core file section in the regcache. */
589 for (regi = 0; regi < 32; regi++)
590 supply_register (regi, (char *) ®s->r64.gpr[regi]);
592 if (tdep->ppc_fp0_regnum >= 0)
593 for (regi = 0; regi < 32; regi++)
594 supply_register (tdep->ppc_fp0_regnum + regi,
595 (char *) ®s->r64.fpr[regi]);
597 supply_register (PC_REGNUM, (char *) ®s->r64.iar);
598 supply_register (tdep->ppc_ps_regnum, (char *) ®s->r64.msr);
599 supply_register (tdep->ppc_cr_regnum, (char *) ®s->r64.cr);
600 supply_register (tdep->ppc_lr_regnum, (char *) ®s->r64.lr);
601 supply_register (tdep->ppc_ctr_regnum, (char *) ®s->r64.ctr);
602 supply_register (tdep->ppc_xer_regnum, (char *) ®s->r64.xer);
603 if (tdep->ppc_fpscr_regnum >= 0)
604 supply_register (tdep->ppc_fpscr_regnum, (char *) ®s->r64.fpscr);
608 for (regi = 0; regi < 32; regi++)
609 supply_register (regi, (char *) ®s->r32.gpr[regi]);
611 if (tdep->ppc_fp0_regnum >= 0)
612 for (regi = 0; regi < 32; regi++)
613 supply_register (tdep->ppc_fp0_regnum + regi,
614 (char *) ®s->r32.fpr[regi]);
616 supply_register (PC_REGNUM, (char *) ®s->r32.iar);
617 supply_register (tdep->ppc_ps_regnum, (char *) ®s->r32.msr);
618 supply_register (tdep->ppc_cr_regnum, (char *) ®s->r32.cr);
619 supply_register (tdep->ppc_lr_regnum, (char *) ®s->r32.lr);
620 supply_register (tdep->ppc_ctr_regnum, (char *) ®s->r32.ctr);
621 supply_register (tdep->ppc_xer_regnum, (char *) ®s->r32.xer);
622 if (tdep->ppc_fpscr_regnum >= 0)
623 supply_register (tdep->ppc_fpscr_regnum, (char *) ®s->r32.fpscr);
624 if (tdep->ppc_mq_regnum >= 0)
625 supply_register (tdep->ppc_mq_regnum, (char *) ®s->r32.mq);
630 /* Copy information about text and data sections from LDI to VP for a 64-bit
631 process if ARCH64 and for a 32-bit process otherwise. */
634 vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
638 vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
639 vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
640 vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
641 vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
645 vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
646 vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
647 vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
648 vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
651 /* The run time loader maps the file header in addition to the text
652 section and returns a pointer to the header in ldinfo_textorg.
653 Adjust the text start address to point to the real start address
654 of the text section. */
655 vp->tstart += vp->toffs;
658 /* handle symbol translation on vmapping */
661 vmap_symtab (struct vmap *vp)
663 struct objfile *objfile;
664 struct section_offsets *new_offsets;
667 objfile = vp->objfile;
670 /* OK, it's not an objfile we opened ourselves.
671 Currently, that can only happen with the exec file, so
672 relocate the symbols for the symfile. */
673 if (symfile_objfile == NULL)
675 objfile = symfile_objfile;
677 else if (!vp->loaded)
678 /* If symbols are not yet loaded, offsets are not yet valid. */
682 (struct section_offsets *)
683 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
685 for (i = 0; i < objfile->num_sections; ++i)
686 new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
688 /* The symbols in the object file are linked to the VMA of the section,
689 relocate them VMA relative. */
690 new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
691 new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
692 new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
694 objfile_relocate (objfile, new_offsets);
697 /* Add symbols for an objfile. */
700 objfile_symbol_add (void *arg)
702 struct objfile *obj = (struct objfile *) arg;
704 syms_from_objfile (obj, NULL, 0, 0, 0, 0);
705 new_symfile_objfile (obj, 0, 0);
709 /* Add symbols for a vmap. Return zero upon error. */
712 vmap_add_symbols (struct vmap *vp)
714 if (catch_errors (objfile_symbol_add, vp->objfile,
715 "Error while reading shared library symbols:\n",
718 /* Note this is only done if symbol reading was successful. */
726 /* Add a new vmap entry based on ldinfo() information.
728 If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
729 core file), the caller should set it to -1, and we will open the file.
731 Return the vmap new entry. */
734 add_vmap (LdInfo *ldi)
737 char *mem, *objname, *filename;
741 ARCH64_DECL (arch64);
743 /* This ldi structure was allocated using alloca() in
744 xcoff_relocate_symtab(). Now we need to have persistent object
745 and member names, so we should save them. */
747 filename = LDI_FILENAME (ldi, arch64);
748 mem = filename + strlen (filename) + 1;
749 mem = savestring (mem, strlen (mem));
750 objname = savestring (filename, strlen (filename));
752 fd = LDI_FD (ldi, arch64);
754 /* Note that this opens it once for every member; a possible
755 enhancement would be to only open it once for every object. */
756 abfd = bfd_openr (objname, gnutarget);
758 abfd = bfd_fdopenr (objname, gnutarget, fd);
761 warning ("Could not open `%s' as an executable file: %s",
762 objname, bfd_errmsg (bfd_get_error ()));
766 /* make sure we have an object file */
768 if (bfd_check_format (abfd, bfd_object))
769 vp = map_vmap (abfd, 0);
771 else if (bfd_check_format (abfd, bfd_archive))
774 /* FIXME??? am I tossing BFDs? bfd? */
775 while ((last = bfd_openr_next_archived_file (abfd, last)))
776 if (DEPRECATED_STREQ (mem, last->filename))
781 warning ("\"%s\": member \"%s\" missing.", objname, mem);
786 if (!bfd_check_format (last, bfd_object))
788 warning ("\"%s\": member \"%s\" not in executable format: %s.",
789 objname, mem, bfd_errmsg (bfd_get_error ()));
795 vp = map_vmap (last, abfd);
799 warning ("\"%s\": not in executable format: %s.",
800 objname, bfd_errmsg (bfd_get_error ()));
804 obj = allocate_objfile (vp->bfd, 0);
807 /* Always add symbols for the main objfile. */
808 if (vp == vmap || auto_solib_add)
809 vmap_add_symbols (vp);
813 /* update VMAP info with ldinfo() information
814 Input is ptr to ldinfo() results. */
817 vmap_ldinfo (LdInfo *ldi)
821 int got_one, retried;
822 int got_exec_file = 0;
824 int arch64 = ARCH64 ();
826 /* For each *ldi, see if we have a corresponding *vp.
827 If so, update the mapping, and symbol table.
828 If not, add an entry and symbol table. */
832 char *name = LDI_FILENAME (ldi, arch64);
833 char *memb = name + strlen (name) + 1;
834 int fd = LDI_FD (ldi, arch64);
838 if (fstat (fd, &ii) < 0)
840 /* The kernel sets ld_info to -1, if the process is still using the
841 object, and the object is removed. Keep the symbol info for the
842 removed object and issue a warning. */
843 warning ("%s (fd=%d) has disappeared, keeping its symbols",
848 for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
850 struct objfile *objfile;
852 /* First try to find a `vp', which is the same as in ldinfo.
853 If not the same, just continue and grep the next `vp'. If same,
854 relocate its tstart, tend, dstart, dend values. If no such `vp'
855 found, get out of this for loop, add this ldi entry as a new vmap
856 (add_vmap) and come back, find its `vp' and so on... */
858 /* The filenames are not always sufficient to match on. */
860 if ((name[0] == '/' && !DEPRECATED_STREQ (name, vp->name))
861 || (memb[0] && !DEPRECATED_STREQ (memb, vp->member)))
864 /* See if we are referring to the same file.
865 We have to check objfile->obfd, symfile.c:reread_symbols might
866 have updated the obfd after a change. */
867 objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
869 || objfile->obfd == NULL
870 || bfd_stat (objfile->obfd, &vi) < 0)
872 warning ("Unable to stat %s, keeping its symbols", name);
876 if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
884 /* Found a corresponding VMAP. Remap! */
886 vmap_secs (vp, ldi, arch64);
888 /* The objfile is only NULL for the exec file. */
889 if (vp->objfile == NULL)
892 /* relocate symbol table(s). */
895 /* Announce new object files. Doing this after symbol relocation
896 makes aix-thread.c's job easier. */
897 if (deprecated_target_new_objfile_hook && vp->objfile)
898 deprecated_target_new_objfile_hook (vp->objfile);
900 /* There may be more, so we don't break out of the loop. */
903 /* if there was no matching *vp, we must perforce create the sucker(s) */
904 if (!got_one && !retried)
911 while ((next = LDI_NEXT (ldi, arch64))
912 && (ldi = (void *) (next + (char *) ldi)));
914 /* If we don't find the symfile_objfile anywhere in the ldinfo, it
915 is unlikely that the symbol file is relocated to the proper
916 address. And we might have attached to a process which is
917 running a different copy of the same executable. */
918 if (symfile_objfile != NULL && !got_exec_file)
920 warning ("Symbol file %s\nis not mapped; discarding it.\n\
921 If in fact that file has symbols which the mapped files listed by\n\
922 \"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
923 \"add-symbol-file\" commands (note that you must take care of relocating\n\
924 symbols to the proper address).",
925 symfile_objfile->name);
926 free_objfile (symfile_objfile);
927 symfile_objfile = NULL;
929 breakpoint_re_set ();
932 /* As well as symbol tables, exec_sections need relocation. After
933 the inferior process' termination, there will be a relocated symbol
934 table exist with no corresponding inferior process. At that time, we
935 need to use `exec' bfd, rather than the inferior process's memory space
938 `exec_sections' need to be relocated only once, as long as the exec
939 file remains unchanged.
948 if (execbfd == exec_bfd)
953 if (!vmap || !exec_ops.to_sections)
954 error ("vmap_exec: vmap or exec_ops.to_sections == 0\n");
956 for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
958 if (DEPRECATED_STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name))
960 exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
961 exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
963 else if (DEPRECATED_STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name))
965 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
966 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
968 else if (DEPRECATED_STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name))
970 exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
971 exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
976 /* Set the current architecture from the host running GDB. Called when
977 starting a child process. */
980 set_host_arch (int pid)
982 enum bfd_architecture arch;
985 struct gdbarch_info info;
989 arch = bfd_arch_rs6000;
990 mach = bfd_mach_rs6k;
994 arch = bfd_arch_powerpc;
998 /* FIXME: schauer/2002-02-25:
999 We don't know if we are executing a 32 or 64 bit executable,
1000 and have no way to pass the proper word size to rs6000_gdbarch_init.
1001 So we have to avoid switching to a new architecture, if the architecture
1003 Blindly calling rs6000_gdbarch_init used to work in older versions of
1004 GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
1005 determine the wordsize. */
1008 const struct bfd_arch_info *exec_bfd_arch_info;
1010 exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
1011 if (arch == exec_bfd_arch_info->arch)
1015 bfd_default_set_arch_mach (&abfd, arch, mach);
1017 gdbarch_info_init (&info);
1018 info.bfd_arch_info = bfd_get_arch_info (&abfd);
1019 info.abfd = exec_bfd;
1021 if (!gdbarch_update_p (info))
1023 internal_error (__FILE__, __LINE__,
1024 "set_host_arch: failed to select architecture");
1029 /* xcoff_relocate_symtab - hook for symbol table relocation.
1030 also reads shared libraries.. */
1033 xcoff_relocate_symtab (unsigned int pid)
1035 int load_segs = 64; /* number of load segments */
1038 int arch64 = ARCH64 ();
1039 int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
1044 size = load_segs * ldisize;
1045 ldi = (void *) xrealloc (ldi, size);
1048 /* According to my humble theory, AIX has some timing problems and
1049 when the user stack grows, kernel doesn't update stack info in time
1050 and ptrace calls step on user stack. That is why we sleep here a
1051 little, and give kernel to update its internals. */
1056 rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
1058 rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
1062 if (errno == ENOMEM)
1065 perror_with_name ("ptrace ldinfo");
1070 vmap_exec (); /* relocate the exec and core sections as well. */
1077 /* Core file stuff. */
1079 /* Relocate symtabs and read in shared library info, based on symbols
1080 from the core file. */
1083 xcoff_relocate_core (struct target_ops *target)
1085 struct bfd_section *ldinfo_sec;
1089 int arch64 = ARCH64 ();
1091 /* Size of a struct ld_info except for the variable-length filename. */
1092 int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
1094 /* Allocated size of buffer. */
1095 int buffer_size = nonfilesz;
1096 char *buffer = xmalloc (buffer_size);
1097 struct cleanup *old = make_cleanup (free_current_contents, &buffer);
1099 ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
1100 if (ldinfo_sec == NULL)
1103 fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
1104 bfd_errmsg (bfd_get_error ()));
1111 int names_found = 0;
1113 /* Read in everything but the name. */
1114 if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
1115 offset, nonfilesz) == 0)
1122 if (i == buffer_size)
1125 buffer = xrealloc (buffer, buffer_size);
1127 if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
1128 offset + i, 1) == 0)
1130 if (buffer[i++] == '\0')
1133 while (names_found < 2);
1135 ldi = (LdInfo *) buffer;
1137 /* Can't use a file descriptor from the core file; need to open it. */
1139 ldi->l64.ldinfo_fd = -1;
1141 ldi->l32.ldinfo_fd = -1;
1143 /* The first ldinfo is for the exec file, allocated elsewhere. */
1144 if (offset == 0 && vmap != NULL)
1147 vp = add_vmap (ldi);
1149 /* Process next shared library upon error. */
1150 offset += LDI_NEXT (ldi, arch64);
1154 vmap_secs (vp, ldi, arch64);
1156 /* Unless this is the exec file,
1157 add our sections to the section table for the core target. */
1160 struct section_table *stp;
1162 target_resize_to_sections (target, 2);
1163 stp = target->to_sections_end - 2;
1166 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
1167 stp->addr = vp->tstart;
1168 stp->endaddr = vp->tend;
1172 stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
1173 stp->addr = vp->dstart;
1174 stp->endaddr = vp->dend;
1179 if (deprecated_target_new_objfile_hook && vp != vmap && vp->objfile)
1180 deprecated_target_new_objfile_hook (vp->objfile);
1182 while (LDI_NEXT (ldi, arch64) != 0);
1184 breakpoint_re_set ();
1189 kernel_u_size (void)
1191 return (sizeof (struct user));
1194 /* Under AIX, we have to pass the correct TOC pointer to a function
1195 when calling functions in the inferior.
1196 We try to find the relative toc offset of the objfile containing PC
1197 and add the current load address of the data segment from the vmap. */
1200 find_toc_address (CORE_ADDR pc)
1203 extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */
1205 for (vp = vmap; vp; vp = vp->nxt)
1207 if (pc >= vp->tstart && pc < vp->tend)
1209 /* vp->objfile is only NULL for the exec file. */
1210 return vp->dstart + get_toc_offset (vp->objfile == NULL
1215 error ("Unable to find TOC entry for pc %s\n", local_hex_string (pc));
1218 /* Register that we are able to handle rs6000 core file formats. */
1220 static struct core_fns rs6000_core_fns =
1222 bfd_target_xcoff_flavour, /* core_flavour */
1223 default_check_format, /* check_format */
1224 default_core_sniffer, /* core_sniffer */
1225 fetch_core_registers, /* core_read_registers */
1230 _initialize_core_rs6000 (void)
1232 /* Initialize hook in rs6000-tdep.c for determining the TOC address when
1233 calling functions in the inferior. */
1234 rs6000_find_toc_address_hook = find_toc_address;
1236 /* Initialize hook in rs6000-tdep.c to set the current architecture when
1237 starting a child process. */
1238 rs6000_set_host_arch_hook = set_host_arch;
1240 deprecated_add_core_fns (&rs6000_core_fns);