mirror of
https://sourceware.org/git/binutils-gdb.git
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948a9d9233
change for core_read_registers in struct core_fns. * core-regset.c (fetch_core_registers): Ditto & add prototype. * core-sol2.c (fetch_core_registers): Ditto & add prototype. * i386aix-nat.c (fetch_core_registers): Ditto & add prototype. * i386b-nat.c (fetch_core_registers): Ditto. * i386mach-nat.c (fetch_core_registers): Ditto & add prototype. * irix4-nat.c (fetch_core_registers): Ditto. * irix5-nat.c (fetch_core_registers): Ditto. * lynx-nat.c (fetch_core_registers): Ditto & add prototype. * m68knbsd-nat.c (fetch_core_registers): Ditto. * mips-nat.c (fetch_core_registers): Ditto & add prototype. * rs6000-nat.c (fetch_core_registers): Ditto. * sparc-nat.c (fetch_core_registers): Ditto. * sun3-nat.c (fetch_core_registers): Ditto & add prototype. * ultra3-nat.c (fetch_core_registers): Ditto & add prototype. * alpha-nat.c (register_addr): Match Sep 4 gdbcore.h prototype change. * delta68-nat.c (register_addr): Ditto. * gdbserver/low-linux.c (register_addr): Ditto. * gdbserver/low-hppabsd.c (register_addr): Ditto. * i386m3-nat.c (register_addr): Ditto. * mips-nat.c (register_addr): Ditto. * ultra3-nat.c (register_addr): Ditto.
845 lines
23 KiB
C
845 lines
23 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
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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, 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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add_text_to_loadinfo PARAMS ((CORE_ADDR textaddr, CORE_ADDR dataaddr));
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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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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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extern char registers[];
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if (regno < 0) { /* 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) ®isters [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_SP_REGNUM-FIRST_SP_REGNUM; ++ii)
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*(int*)®isters[REGISTER_BYTE (FIRST_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) { /* 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) { /* a FPR */
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ptrace (PT_READ_FPR, inferior_pid,
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(PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (regno)],
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(regno-FP0_REGNUM+FPR0), 0);
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}
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else if (regno <= LAST_SP_REGNUM) { /* 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_SP_REGNUM], 0, 0);
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}
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else
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fprintf_unfiltered (gdb_stderr, "gdb error: register no %d not implemented.\n", 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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extern char registers[];
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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) ®isters[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_SP_REGNUM-FIRST_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_SP_REGNUM+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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}
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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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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) ®isters[REGISTER_BYTE (regno)],
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regno - FP0_REGNUM + FPR0, 0);
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}
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else if (regno <= LAST_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_SP_REGNUM],
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*(int*)®isters[REGISTER_BYTE (regno)], 0);
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}
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else
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fprintf_unfiltered (gdb_stderr, "Gdb error: register no %d not implemented.\n", 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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unsigned 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 assume that
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this address will never be executed again by the real 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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pid = wait (&status);
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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_SP_REGNUM)], core_reg_sect,
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(LAST_SP_REGNUM - FIRST_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 (gdb_stderr, "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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CORE_ADDR text_delta;
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CORE_ADDR data_delta;
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CORE_ADDR bss_delta;
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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 = alloca
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(sizeof (struct section_offsets)
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+ sizeof (new_offsets->offsets) * objfile->num_sections);
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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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text_delta =
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vp->tstart - ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT);
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ANOFFSET (new_offsets, SECT_OFF_TEXT) = vp->tstart;
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data_delta =
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vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_DATA);
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ANOFFSET (new_offsets, SECT_OFF_DATA) = vp->dstart;
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bss_delta =
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vp->dstart - ANOFFSET (objfile->section_offsets, SECT_OFF_BSS);
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ANOFFSET (new_offsets, SECT_OFF_BSS) = vp->dstart;
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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, 0, 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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|
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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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|
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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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|
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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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|
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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)))
|
||
if (STREQ (mem, last->filename))
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break;
|
||
|
||
if (!last)
|
||
{
|
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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;
|
||
}
|
||
|
||
if (!bfd_check_format(last, bfd_object))
|
||
{
|
||
bfd_close (last); /* XXX??? */
|
||
goto obj_err;
|
||
}
|
||
|
||
vp = map_vmap (last, abfd);
|
||
}
|
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else
|
||
{
|
||
obj_err:
|
||
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);
|
||
vp->objfile = obj;
|
||
|
||
#ifndef SOLIB_SYMBOLS_MANUAL
|
||
if (catch_errors (objfile_symbol_add, (char *)obj,
|
||
"Error while reading shared library symbols:\n",
|
||
RETURN_MASK_ALL))
|
||
{
|
||
/* Note this is only done if symbol reading was successful. */
|
||
vmap_symtab (vp);
|
||
vp->loaded = 1;
|
||
}
|
||
#endif
|
||
return vp;
|
||
}
|
||
|
||
/* update VMAP info with ldinfo() information
|
||
Input is ptr to ldinfo() results. */
|
||
|
||
static void
|
||
vmap_ldinfo (ldi)
|
||
register struct ld_info *ldi;
|
||
{
|
||
struct stat ii, vi;
|
||
register struct vmap *vp;
|
||
int got_one, retried;
|
||
int got_exec_file = 0;
|
||
|
||
/* For each *ldi, see if we have a corresponding *vp.
|
||
If so, update the mapping, and symbol table.
|
||
If not, add an entry and symbol table. */
|
||
|
||
do {
|
||
char *name = ldi->ldinfo_filename;
|
||
char *memb = name + strlen(name) + 1;
|
||
|
||
retried = 0;
|
||
|
||
if (fstat (ldi->ldinfo_fd, &ii) < 0)
|
||
fatal ("cannot fstat(fd=%d) on %s", ldi->ldinfo_fd, name);
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||
retry:
|
||
for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
|
||
{
|
||
/* 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, fins 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. */
|
||
if (bfd_stat (vp->bfd, &vi) < 0)
|
||
/* An error here is innocuous, most likely meaning that
|
||
the file descriptor has become worthless.
|
||
FIXME: What does it mean for a file descriptor to become
|
||
"worthless"? What makes it happen? What error does it
|
||
produce (ENOENT? others?)? Should we at least provide
|
||
a warning? */
|
||
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;
|
||
|
||
if (vp->tadj)
|
||
{
|
||
vp->tstart += vp->tadj;
|
||
vp->tend += vp->tadj;
|
||
}
|
||
|
||
/* The objfile is only NULL for the exec file. */
|
||
if (vp->objfile == NULL)
|
||
got_exec_file = 1;
|
||
|
||
#ifdef DONT_RELOCATE_SYMFILE_OBJFILE
|
||
if (vp->objfile == symfile_objfile
|
||
|| vp->objfile == NULL)
|
||
{
|
||
ldi->ldinfo_dataorg = 0;
|
||
vp->dstart = (CORE_ADDR) 0;
|
||
vp->dend = ldi->ldinfo_datasize;
|
||
}
|
||
#endif
|
||
|
||
/* 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;
|
||
exec_ops.to_sections[i].endaddr += vmap->tstart;
|
||
}
|
||
else if (STREQ(".data", exec_ops.to_sections[i].the_bfd_section->name))
|
||
{
|
||
exec_ops.to_sections[i].addr += vmap->dstart;
|
||
exec_ops.to_sections[i].endaddr += vmap->dstart;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* xcoff_relocate_symtab - hook for symbol table relocation.
|
||
also reads shared libraries.. */
|
||
|
||
void
|
||
xcoff_relocate_symtab (pid)
|
||
unsigned int pid;
|
||
{
|
||
#define MAX_LOAD_SEGS 64 /* maximum number of load segments */
|
||
|
||
struct ld_info *ldi;
|
||
|
||
ldi = (void *) alloca(MAX_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;
|
||
ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi,
|
||
MAX_LOAD_SEGS * sizeof(*ldi), ldi);
|
||
if (errno)
|
||
perror_with_name ("ptrace ldinfo");
|
||
|
||
vmap_ldinfo (ldi);
|
||
|
||
do {
|
||
/* We are allowed to assume CORE_ADDR == pointer. This code is
|
||
native only. */
|
||
add_text_to_loadinfo ((CORE_ADDR) ldi->ldinfo_textorg,
|
||
(CORE_ADDR) ldi->ldinfo_dataorg);
|
||
} while (ldi->ldinfo_next
|
||
&& (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
|
||
|
||
#if 0
|
||
/* Now that we've jumbled things around, re-sort them. */
|
||
sort_minimal_symbols ();
|
||
#endif
|
||
|
||
/* relocate the exec and core sections as well. */
|
||
vmap_exec ();
|
||
}
|
||
|
||
/* 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;
|
||
|
||
#ifdef DONT_RELOCATE_SYMFILE_OBJFILE
|
||
if (vp == vmap)
|
||
{
|
||
vp->dstart = (CORE_ADDR) 0;
|
||
vp->dend = ldip->ldinfo_datasize;
|
||
}
|
||
#endif
|
||
|
||
if (vp->tadj != 0)
|
||
{
|
||
vp->tstart += vp->tadj;
|
||
vp->tend += vp->tadj;
|
||
}
|
||
|
||
/* Unless this is the exec file,
|
||
add our sections to the section table for the core target. */
|
||
if (vp != vmap)
|
||
{
|
||
int count;
|
||
struct section_table *stp;
|
||
int update_coreops;
|
||
|
||
/* We must update the to_sections field in the core_ops structure
|
||
now to avoid dangling pointer dereferences. */
|
||
update_coreops = core_ops.to_sections == target->to_sections;
|
||
|
||
count = target->to_sections_end - target->to_sections;
|
||
count += 2;
|
||
target->to_sections = (struct section_table *)
|
||
xrealloc (target->to_sections,
|
||
sizeof (struct section_table) * count);
|
||
target->to_sections_end = target->to_sections + count;
|
||
|
||
/* Update the to_sections field in the core_ops structure
|
||
if needed. */
|
||
if (update_coreops)
|
||
{
|
||
core_ops.to_sections = target->to_sections;
|
||
core_ops.to_sections_end = target->to_sections_end;
|
||
}
|
||
stp = target->to_sections_end - 2;
|
||
|
||
/* "Why do we add bfd_section_vma?", I hear you cry.
|
||
Well, the start of the section in the file is actually
|
||
that far into the section as the struct vmap understands it.
|
||
So for text sections, bfd_section_vma tends to be 0x200,
|
||
and if vp->tstart is 0xd0002000, then the first byte of
|
||
the text section on disk corresponds to address 0xd0002200. */
|
||
stp->bfd = vp->bfd;
|
||
stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".text");
|
||
stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tstart;
|
||
stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->tend;
|
||
stp++;
|
||
|
||
stp->bfd = vp->bfd;
|
||
stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
|
||
stp->addr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dstart;
|
||
stp->endaddr = bfd_section_vma (stp->bfd, stp->the_bfd_section) + vp->dend;
|
||
}
|
||
|
||
vmap_symtab (vp);
|
||
|
||
add_text_to_loadinfo ((CORE_ADDR)ldip->ldinfo_textorg,
|
||
(CORE_ADDR)ldip->ldinfo_dataorg);
|
||
} while (ldip->ldinfo_next != 0);
|
||
vmap_exec ();
|
||
breakpoint_re_set ();
|
||
do_cleanups (old);
|
||
}
|
||
|
||
int
|
||
kernel_u_size ()
|
||
{
|
||
return (sizeof (struct user));
|
||
}
|
||
|
||
|
||
/* Register that we are able to handle rs6000 core file formats. */
|
||
|
||
static struct core_fns rs6000_core_fns =
|
||
{
|
||
bfd_target_coff_flavour,
|
||
fetch_core_registers,
|
||
NULL
|
||
};
|
||
|
||
void
|
||
_initialize_core_rs6000 ()
|
||
{
|
||
/* 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);
|
||
}
|