mirror of
https://sourceware.org/git/binutils-gdb.git
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b8fbeb1874
* objfiles.h (SECT_OFF_DATA, SECT_OFF_TEXT, SECT_OFF_BSS, SECT_OFF_RODATA): Define as functions of OBJFILE. Add sect_index_text, sect_index_data, sect_index_rodata, sect_index_bss to objfile structure. * gdb-stabs.h (SECT_OFF_DATA, SECT_OFF_TEXT, SECT_OFF_BSS, SECT_OFF_RODATA): Remove. * objfiles.c (allocate_objfile): Initialize sect_index_{text,data,bss,rodata} to -1, for error detection. * symfile.c (default_symfile_offsets): Initialize sect_index_{text,data,bss,rodata} from bfd information. * xcoffread.c (xcoff_symfile_offsets): Ditto. * somread.c (som_symfile_offsets): Initialize sect_index_{text,data,bss,rodata}. * coffread.c, dbxread.c, elfread.c, hp-psymtab-read.c, hp-symtab-read.c, hpread.c, mdebugread.c, minsyms.c, mipsread.c, objfiles.c, os9kread.c, pa64solib.c, partial-stab.h, remote-os9k.c, remote-vx.c, remote.c, rs6000-nat.c, somsolib.c, stabsread.c, symfile.c, xcoffread.c: Update use of SECT_OFF_{TEXT,DATA,BSS,RODATA} to depend on the current objfile. * xcoffread.c: Add new field objfile to find_targ_sec_arg.
854 lines
24 KiB
C
854 lines
24 KiB
C
/* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
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Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996, 1997, 1998
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "xcoffsolib.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "libbfd.h" /* For bfd_cache_lookup (FIXME) */
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#include "bfd.h"
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#include "gdb-stabs.h"
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#include <sys/ptrace.h>
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#include <sys/reg.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <sys/user.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <a.out.h>
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include <sys/core.h>
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#include <sys/ldr.h>
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extern int errno;
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extern struct vmap *map_vmap PARAMS ((bfd * bf, bfd * arch));
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extern struct target_ops exec_ops;
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static void
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vmap_exec PARAMS ((void));
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static void
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vmap_ldinfo PARAMS ((struct ld_info *));
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static struct vmap *
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add_vmap PARAMS ((struct ld_info *));
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static int
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objfile_symbol_add PARAMS ((char *));
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static void
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vmap_symtab PARAMS ((struct vmap *));
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static void
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fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR));
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static void
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exec_one_dummy_insn PARAMS ((void));
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extern void
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fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta));
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/* Conversion from gdb-to-system special purpose register numbers.. */
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static int special_regs[] =
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{
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IAR, /* PC_REGNUM */
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MSR, /* PS_REGNUM */
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CR, /* CR_REGNUM */
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LR, /* LR_REGNUM */
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CTR, /* CTR_REGNUM */
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XER, /* XER_REGNUM */
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MQ /* MQ_REGNUM */
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};
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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int ii;
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if (regno < 0)
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{ /* for all registers */
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/* read 32 general purpose registers. */
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for (ii = 0; ii < 32; ++ii)
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*(int *) ®isters[REGISTER_BYTE (ii)] =
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ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0);
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/* read general purpose floating point registers. */
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for (ii = 0; ii < 32; ++ii)
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ptrace (PT_READ_FPR, inferior_pid,
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(PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (FP0_REGNUM + ii)],
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FPR0 + ii, 0);
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/* read special registers. */
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for (ii = 0; ii <= LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM; ++ii)
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*(int *) ®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM + ii)] =
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ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii],
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0, 0);
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registers_fetched ();
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return;
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}
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/* else an individual register is addressed. */
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else if (regno < FP0_REGNUM)
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{ /* a GPR */
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*(int *) ®isters[REGISTER_BYTE (regno)] =
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ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0, 0);
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}
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else if (regno <= FPLAST_REGNUM)
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{ /* a FPR */
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ptrace (PT_READ_FPR, inferior_pid,
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(PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (regno)],
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(regno - FP0_REGNUM + FPR0), 0);
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}
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else if (regno <= LAST_UISA_SP_REGNUM)
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{ /* a special register */
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*(int *) ®isters[REGISTER_BYTE (regno)] =
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ptrace (PT_READ_GPR, inferior_pid,
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(PTRACE_ARG3_TYPE) special_regs[regno - FIRST_UISA_SP_REGNUM],
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0, 0);
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}
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else
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fprintf_unfiltered (gdb_stderr,
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"gdb error: register no %d not implemented.\n",
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regno);
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register_valid[regno] = 1;
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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store_inferior_registers (regno)
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int regno;
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{
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errno = 0;
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if (regno == -1)
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{ /* for all registers.. */
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int ii;
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/* execute one dummy instruction (which is a breakpoint) in inferior
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process. So give kernel a chance to do internal house keeping.
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Otherwise the following ptrace(2) calls will mess up user stack
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since kernel will get confused about the bottom of the stack (%sp) */
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exec_one_dummy_insn ();
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/* write general purpose registers first! */
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for (ii = GPR0; ii <= GPR31; ++ii)
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{
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ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii,
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*(int *) ®isters[REGISTER_BYTE (ii)], 0);
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if (errno)
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{
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perror ("ptrace write_gpr");
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errno = 0;
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}
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}
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/* write floating point registers now. */
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for (ii = 0; ii < 32; ++ii)
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{
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ptrace (PT_WRITE_FPR, inferior_pid,
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(PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (FP0_REGNUM + ii)],
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FPR0 + ii, 0);
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if (errno)
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{
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perror ("ptrace write_fpr");
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errno = 0;
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}
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}
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/* write special registers. */
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for (ii = 0; ii <= LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM; ++ii)
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{
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ptrace (PT_WRITE_GPR, inferior_pid,
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(PTRACE_ARG3_TYPE) special_regs[ii],
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*(int *) ®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM + ii)],
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0);
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if (errno)
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{
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perror ("ptrace write_gpr");
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errno = 0;
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}
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}
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}
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/* else, a specific register number is given... */
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else if (regno < FP0_REGNUM) /* a GPR */
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{
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if (regno == SP_REGNUM)
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exec_one_dummy_insn ();
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ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno,
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*(int *) ®isters[REGISTER_BYTE (regno)], 0);
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}
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else if (regno <= FPLAST_REGNUM) /* a FPR */
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{
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ptrace (PT_WRITE_FPR, inferior_pid,
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(PTRACE_ARG3_TYPE) & registers[REGISTER_BYTE (regno)],
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regno - FP0_REGNUM + FPR0, 0);
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}
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else if (regno <= LAST_UISA_SP_REGNUM) /* a special register */
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{
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ptrace (PT_WRITE_GPR, inferior_pid,
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(PTRACE_ARG3_TYPE) special_regs[regno - FIRST_UISA_SP_REGNUM],
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*(int *) ®isters[REGISTER_BYTE (regno)], 0);
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}
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else if (regno < NUM_REGS)
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{
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/* Ignore it. */
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}
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else
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fprintf_unfiltered (gdb_stderr,
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"Gdb error: register no %d not implemented.\n",
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regno);
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if (errno)
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{
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perror ("ptrace write");
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errno = 0;
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}
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}
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/* Execute one dummy breakpoint instruction. This way we give the kernel
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a chance to do some housekeeping and update inferior's internal data,
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including u_area. */
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static void
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exec_one_dummy_insn ()
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{
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#define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
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char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
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int status, pid;
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CORE_ADDR prev_pc;
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/* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
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assume that this address will never be executed again by the real
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code. */
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target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents);
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errno = 0;
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/* You might think this could be done with a single ptrace call, and
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you'd be correct for just about every platform I've ever worked
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on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
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the inferior never hits the breakpoint (it's also worth noting
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powerpc-ibm-aix4.1.3 works correctly). */
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prev_pc = read_pc ();
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write_pc (DUMMY_INSN_ADDR);
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ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE) 1, 0, 0);
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if (errno)
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perror ("pt_continue");
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do
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{
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pid = wait (&status);
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}
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while (pid != inferior_pid);
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write_pc (prev_pc);
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target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents);
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}
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static void
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fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
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char *core_reg_sect;
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unsigned core_reg_size;
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int which;
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CORE_ADDR reg_addr; /* Unused in this version */
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{
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/* fetch GPRs and special registers from the first register section
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in core bfd. */
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if (which == 0)
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{
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/* copy GPRs first. */
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memcpy (registers, core_reg_sect, 32 * 4);
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/* gdb's internal register template and bfd's register section layout
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should share a common include file. FIXMEmgo */
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/* then comes special registes. They are supposed to be in the same
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order in gdb template and bfd `.reg' section. */
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core_reg_sect += (32 * 4);
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memcpy (®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM)],
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core_reg_sect,
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(LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM + 1) * 4);
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}
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/* fetch floating point registers from register section 2 in core bfd. */
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else if (which == 2)
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memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8);
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else
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fprintf_unfiltered
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(gdb_stderr,
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"Gdb error: unknown parameter to fetch_core_registers().\n");
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}
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/* handle symbol translation on vmapping */
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static void
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vmap_symtab (vp)
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register struct vmap *vp;
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{
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register struct objfile *objfile;
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struct section_offsets *new_offsets;
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int i;
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objfile = vp->objfile;
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if (objfile == NULL)
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{
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/* OK, it's not an objfile we opened ourselves.
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Currently, that can only happen with the exec file, so
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relocate the symbols for the symfile. */
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if (symfile_objfile == NULL)
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return;
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objfile = symfile_objfile;
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}
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new_offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
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for (i = 0; i < objfile->num_sections; ++i)
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ANOFFSET (new_offsets, i) = ANOFFSET (objfile->section_offsets, i);
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/* The symbols in the object file are linked to the VMA of the section,
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relocate them VMA relative. */
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ANOFFSET (new_offsets, SECT_OFF_TEXT (objfile)) = vp->tstart - vp->tvma;
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ANOFFSET (new_offsets, SECT_OFF_DATA (objfile)) = vp->dstart - vp->dvma;
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ANOFFSET (new_offsets, SECT_OFF_BSS (objfile)) = vp->dstart - vp->dvma;
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objfile_relocate (objfile, new_offsets);
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}
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/* Add symbols for an objfile. */
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static int
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objfile_symbol_add (arg)
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char *arg;
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{
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struct objfile *obj = (struct objfile *) arg;
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syms_from_objfile (obj, NULL, 0, 0);
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new_symfile_objfile (obj, 0, 0);
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return 1;
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}
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/* Add a new vmap entry based on ldinfo() information.
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If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
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core file), the caller should set it to -1, and we will open the file.
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Return the vmap new entry. */
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static struct vmap *
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add_vmap (ldi)
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register struct ld_info *ldi;
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{
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bfd *abfd, *last;
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register char *mem, *objname;
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struct objfile *obj;
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struct vmap *vp;
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/* This ldi structure was allocated using alloca() in
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xcoff_relocate_symtab(). Now we need to have persistent object
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and member names, so we should save them. */
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mem = ldi->ldinfo_filename + strlen (ldi->ldinfo_filename) + 1;
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mem = savestring (mem, strlen (mem));
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objname = savestring (ldi->ldinfo_filename, strlen (ldi->ldinfo_filename));
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if (ldi->ldinfo_fd < 0)
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/* Note that this opens it once for every member; a possible
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enhancement would be to only open it once for every object. */
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abfd = bfd_openr (objname, gnutarget);
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else
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abfd = bfd_fdopenr (objname, gnutarget, ldi->ldinfo_fd);
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if (!abfd)
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error ("Could not open `%s' as an executable file: %s",
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objname, bfd_errmsg (bfd_get_error ()));
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/* make sure we have an object file */
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if (bfd_check_format (abfd, bfd_object))
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vp = map_vmap (abfd, 0);
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else if (bfd_check_format (abfd, bfd_archive))
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{
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last = 0;
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/* FIXME??? am I tossing BFDs? bfd? */
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while ((last = bfd_openr_next_archived_file (abfd, last)))
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if (STREQ (mem, last->filename))
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break;
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if (!last)
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{
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bfd_close (abfd);
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/* FIXME -- should be error */
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warning ("\"%s\": member \"%s\" missing.", abfd->filename, mem);
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return 0;
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}
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if (!bfd_check_format (last, bfd_object))
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{
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bfd_close (last); /* XXX??? */
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goto obj_err;
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}
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vp = map_vmap (last, abfd);
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}
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else
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{
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obj_err:
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bfd_close (abfd);
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error ("\"%s\": not in executable format: %s.",
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objname, bfd_errmsg (bfd_get_error ()));
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/*NOTREACHED */
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}
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obj = allocate_objfile (vp->bfd, 0);
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vp->objfile = obj;
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#ifndef SOLIB_SYMBOLS_MANUAL
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if (catch_errors (objfile_symbol_add, (char *) obj,
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"Error while reading shared library symbols:\n",
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RETURN_MASK_ALL))
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{
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/* Note this is only done if symbol reading was successful. */
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vmap_symtab (vp);
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vp->loaded = 1;
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}
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#endif
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return vp;
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}
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/* update VMAP info with ldinfo() information
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Input is ptr to ldinfo() results. */
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static void
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vmap_ldinfo (ldi)
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register struct ld_info *ldi;
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{
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struct stat ii, vi;
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register struct vmap *vp;
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int got_one, retried;
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int got_exec_file = 0;
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/* For each *ldi, see if we have a corresponding *vp.
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If so, update the mapping, and symbol table.
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If not, add an entry and symbol table. */
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do
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{
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char *name = ldi->ldinfo_filename;
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char *memb = name + strlen (name) + 1;
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retried = 0;
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if (fstat (ldi->ldinfo_fd, &ii) < 0)
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{
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/* The kernel sets ld_info to -1, if the process is still using the
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object, and the object is removed. Keep the symbol info for the
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removed object and issue a warning. */
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||
warning ("%s (fd=%d) has disappeared, keeping its symbols",
|
||
name, ldi->ldinfo_fd);
|
||
continue;
|
||
}
|
||
retry:
|
||
for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
|
||
{
|
||
struct objfile *objfile;
|
||
|
||
/* First try to find a `vp', which is the same as in ldinfo.
|
||
If not the same, just continue and grep the next `vp'. If same,
|
||
relocate its tstart, tend, dstart, dend values. If no such `vp'
|
||
found, get out of this for loop, add this ldi entry as a new vmap
|
||
(add_vmap) and come back, find its `vp' and so on... */
|
||
|
||
/* The filenames are not always sufficient to match on. */
|
||
|
||
if ((name[0] == '/' && !STREQ (name, vp->name))
|
||
|| (memb[0] && !STREQ (memb, vp->member)))
|
||
continue;
|
||
|
||
/* See if we are referring to the same file.
|
||
We have to check objfile->obfd, symfile.c:reread_symbols might
|
||
have updated the obfd after a change. */
|
||
objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
|
||
if (objfile == NULL
|
||
|| objfile->obfd == NULL
|
||
|| bfd_stat (objfile->obfd, &vi) < 0)
|
||
{
|
||
warning ("Unable to stat %s, keeping its symbols", name);
|
||
continue;
|
||
}
|
||
|
||
if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
|
||
continue;
|
||
|
||
if (!retried)
|
||
close (ldi->ldinfo_fd);
|
||
|
||
++got_one;
|
||
|
||
/* Found a corresponding VMAP. Remap! */
|
||
|
||
/* We can assume pointer == CORE_ADDR, this code is native only. */
|
||
vp->tstart = (CORE_ADDR) ldi->ldinfo_textorg;
|
||
vp->tend = vp->tstart + ldi->ldinfo_textsize;
|
||
vp->dstart = (CORE_ADDR) ldi->ldinfo_dataorg;
|
||
vp->dend = vp->dstart + ldi->ldinfo_datasize;
|
||
|
||
/* The run time loader maps the file header in addition to the text
|
||
section and returns a pointer to the header in ldinfo_textorg.
|
||
Adjust the text start address to point to the real start address
|
||
of the text section. */
|
||
vp->tstart += vp->toffs;
|
||
|
||
/* The objfile is only NULL for the exec file. */
|
||
if (vp->objfile == NULL)
|
||
got_exec_file = 1;
|
||
|
||
/* relocate symbol table(s). */
|
||
vmap_symtab (vp);
|
||
|
||
/* There may be more, so we don't break out of the loop. */
|
||
}
|
||
|
||
/* if there was no matching *vp, we must perforce create the sucker(s) */
|
||
if (!got_one && !retried)
|
||
{
|
||
add_vmap (ldi);
|
||
++retried;
|
||
goto retry;
|
||
}
|
||
}
|
||
while (ldi->ldinfo_next
|
||
&& (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
|
||
|
||
/* If we don't find the symfile_objfile anywhere in the ldinfo, it
|
||
is unlikely that the symbol file is relocated to the proper
|
||
address. And we might have attached to a process which is
|
||
running a different copy of the same executable. */
|
||
if (symfile_objfile != NULL && !got_exec_file)
|
||
{
|
||
warning_begin ();
|
||
fputs_unfiltered ("Symbol file ", gdb_stderr);
|
||
fputs_unfiltered (symfile_objfile->name, gdb_stderr);
|
||
fputs_unfiltered ("\nis not mapped; discarding it.\n\
|
||
If in fact that file has symbols which the mapped files listed by\n\
|
||
\"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
|
||
\"add-symbol-file\" commands (note that you must take care of relocating\n\
|
||
symbols to the proper address).\n", gdb_stderr);
|
||
free_objfile (symfile_objfile);
|
||
symfile_objfile = NULL;
|
||
}
|
||
breakpoint_re_set ();
|
||
}
|
||
|
||
/* As well as symbol tables, exec_sections need relocation. After
|
||
the inferior process' termination, there will be a relocated symbol
|
||
table exist with no corresponding inferior process. At that time, we
|
||
need to use `exec' bfd, rather than the inferior process's memory space
|
||
to look up symbols.
|
||
|
||
`exec_sections' need to be relocated only once, as long as the exec
|
||
file remains unchanged.
|
||
*/
|
||
|
||
static void
|
||
vmap_exec ()
|
||
{
|
||
static bfd *execbfd;
|
||
int i;
|
||
|
||
if (execbfd == exec_bfd)
|
||
return;
|
||
|
||
execbfd = exec_bfd;
|
||
|
||
if (!vmap || !exec_ops.to_sections)
|
||
error ("vmap_exec: vmap or exec_ops.to_sections == 0\n");
|
||
|
||
for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
|
||
{
|
||
if (STREQ (".text", exec_ops.to_sections[i].the_bfd_section->name))
|
||
{
|
||
exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
|
||
exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
|
||
}
|
||
else if (STREQ (".data", exec_ops.to_sections[i].the_bfd_section->name))
|
||
{
|
||
exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
|
||
exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
|
||
}
|
||
else if (STREQ (".bss", exec_ops.to_sections[i].the_bfd_section->name))
|
||
{
|
||
exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
|
||
exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* xcoff_relocate_symtab - hook for symbol table relocation.
|
||
also reads shared libraries.. */
|
||
|
||
void
|
||
xcoff_relocate_symtab (pid)
|
||
unsigned int pid;
|
||
{
|
||
int load_segs = 64; /* number of load segments */
|
||
int rc;
|
||
struct ld_info *ldi = NULL;
|
||
|
||
do
|
||
{
|
||
ldi = (void *) xrealloc (ldi, load_segs * sizeof (*ldi));
|
||
|
||
/* According to my humble theory, AIX has some timing problems and
|
||
when the user stack grows, kernel doesn't update stack info in time
|
||
and ptrace calls step on user stack. That is why we sleep here a
|
||
little, and give kernel to update its internals. */
|
||
|
||
usleep (36000);
|
||
|
||
errno = 0;
|
||
rc = ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi,
|
||
load_segs * sizeof (*ldi), (int *) ldi);
|
||
if (rc == -1)
|
||
{
|
||
if (errno == ENOMEM)
|
||
load_segs *= 2;
|
||
else
|
||
perror_with_name ("ptrace ldinfo");
|
||
}
|
||
else
|
||
{
|
||
vmap_ldinfo (ldi);
|
||
vmap_exec (); /* relocate the exec and core sections as well. */
|
||
}
|
||
} while (rc == -1);
|
||
if (ldi)
|
||
free (ldi);
|
||
}
|
||
|
||
/* Core file stuff. */
|
||
|
||
/* Relocate symtabs and read in shared library info, based on symbols
|
||
from the core file. */
|
||
|
||
void
|
||
xcoff_relocate_core (target)
|
||
struct target_ops *target;
|
||
{
|
||
/* Offset of member MEMBER in a struct of type TYPE. */
|
||
#ifndef offsetof
|
||
#define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
|
||
#endif
|
||
|
||
/* Size of a struct ld_info except for the variable-length filename. */
|
||
#define LDINFO_SIZE (offsetof (struct ld_info, ldinfo_filename))
|
||
|
||
sec_ptr ldinfo_sec;
|
||
int offset = 0;
|
||
struct ld_info *ldip;
|
||
struct vmap *vp;
|
||
|
||
/* Allocated size of buffer. */
|
||
int buffer_size = LDINFO_SIZE;
|
||
char *buffer = xmalloc (buffer_size);
|
||
struct cleanup *old = make_cleanup (free_current_contents, &buffer);
|
||
|
||
/* FIXME, this restriction should not exist. For now, though I'll
|
||
avoid coredumps with error() pending a real fix. */
|
||
if (vmap == NULL)
|
||
error
|
||
("Can't debug a core file without an executable file (on the RS/6000)");
|
||
|
||
ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
|
||
if (ldinfo_sec == NULL)
|
||
{
|
||
bfd_err:
|
||
fprintf_filtered (gdb_stderr, "Couldn't get ldinfo from core file: %s\n",
|
||
bfd_errmsg (bfd_get_error ()));
|
||
do_cleanups (old);
|
||
return;
|
||
}
|
||
do
|
||
{
|
||
int i;
|
||
int names_found = 0;
|
||
|
||
/* Read in everything but the name. */
|
||
if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
|
||
offset, LDINFO_SIZE) == 0)
|
||
goto bfd_err;
|
||
|
||
/* Now the name. */
|
||
i = LDINFO_SIZE;
|
||
do
|
||
{
|
||
if (i == buffer_size)
|
||
{
|
||
buffer_size *= 2;
|
||
buffer = xrealloc (buffer, buffer_size);
|
||
}
|
||
if (bfd_get_section_contents (core_bfd, ldinfo_sec, &buffer[i],
|
||
offset + i, 1) == 0)
|
||
goto bfd_err;
|
||
if (buffer[i++] == '\0')
|
||
++names_found;
|
||
}
|
||
while (names_found < 2);
|
||
|
||
ldip = (struct ld_info *) buffer;
|
||
|
||
/* Can't use a file descriptor from the core file; need to open it. */
|
||
ldip->ldinfo_fd = -1;
|
||
|
||
/* The first ldinfo is for the exec file, allocated elsewhere. */
|
||
if (offset == 0)
|
||
vp = vmap;
|
||
else
|
||
vp = add_vmap (ldip);
|
||
|
||
offset += ldip->ldinfo_next;
|
||
|
||
/* We can assume pointer == CORE_ADDR, this code is native only. */
|
||
vp->tstart = (CORE_ADDR) ldip->ldinfo_textorg;
|
||
vp->tend = vp->tstart + ldip->ldinfo_textsize;
|
||
vp->dstart = (CORE_ADDR) ldip->ldinfo_dataorg;
|
||
vp->dend = vp->dstart + ldip->ldinfo_datasize;
|
||
|
||
/* The run time loader maps the file header in addition to the text
|
||
section and returns a pointer to the header in ldinfo_textorg.
|
||
Adjust the text start address to point to the real start address
|
||
of the text section. */
|
||
vp->tstart += vp->toffs;
|
||
|
||
/* Unless this is the exec file,
|
||
add our sections to the section table for the core target. */
|
||
if (vp != vmap)
|
||
{
|
||
struct section_table *stp;
|
||
|
||
target_resize_to_sections (target, 2);
|
||
stp = target->to_sections_end - 2;
|
||
|
||
stp->bfd = vp->bfd;
|
||
stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
|
||
stp->addr = vp->tstart;
|
||
stp->endaddr = vp->tend;
|
||
stp++;
|
||
|
||
stp->bfd = vp->bfd;
|
||
stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
|
||
stp->addr = vp->dstart;
|
||
stp->endaddr = vp->dend;
|
||
}
|
||
|
||
vmap_symtab (vp);
|
||
}
|
||
while (ldip->ldinfo_next != 0);
|
||
vmap_exec ();
|
||
breakpoint_re_set ();
|
||
do_cleanups (old);
|
||
}
|
||
|
||
int
|
||
kernel_u_size ()
|
||
{
|
||
return (sizeof (struct user));
|
||
}
|
||
|
||
/* Under AIX, we have to pass the correct TOC pointer to a function
|
||
when calling functions in the inferior.
|
||
We try to find the relative toc offset of the objfile containing PC
|
||
and add the current load address of the data segment from the vmap. */
|
||
|
||
static CORE_ADDR
|
||
find_toc_address (pc)
|
||
CORE_ADDR pc;
|
||
{
|
||
struct vmap *vp;
|
||
|
||
for (vp = vmap; vp; vp = vp->nxt)
|
||
{
|
||
if (pc >= vp->tstart && pc < vp->tend)
|
||
{
|
||
/* vp->objfile is only NULL for the exec file. */
|
||
return vp->dstart + get_toc_offset (vp->objfile == NULL
|
||
? symfile_objfile
|
||
: vp->objfile);
|
||
}
|
||
}
|
||
error ("Unable to find TOC entry for pc 0x%x\n", pc);
|
||
}
|
||
|
||
/* Register that we are able to handle rs6000 core file formats. */
|
||
|
||
static struct core_fns rs6000_core_fns =
|
||
{
|
||
bfd_target_coff_flavour, /* core_flavour */
|
||
default_check_format, /* check_format */
|
||
default_core_sniffer, /* core_sniffer */
|
||
fetch_core_registers, /* core_read_registers */
|
||
NULL /* next */
|
||
};
|
||
|
||
void
|
||
_initialize_core_rs6000 ()
|
||
{
|
||
/* Initialize hook in rs6000-tdep.c for determining the TOC address when
|
||
calling functions in the inferior. */
|
||
find_toc_address_hook = &find_toc_address;
|
||
|
||
/* For native configurations, where this module is included, inform
|
||
the xcoffsolib module where it can find the function for symbol table
|
||
relocation at runtime. */
|
||
xcoff_relocate_symtab_hook = &xcoff_relocate_symtab;
|
||
add_core_fns (&rs6000_core_fns);
|
||
}
|