147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/* Extract registers from a "standard" core file, for GDB.
|
||
Copyright (C) 1988-1998 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
/* Typically used on systems that have a.out format executables.
|
||
corefile.c is supposed to contain the more machine-independent
|
||
aspects of reading registers from core files, while this file is
|
||
more machine specific. */
|
||
|
||
#include "defs.h"
|
||
|
||
#ifdef HAVE_PTRACE_H
|
||
# include <ptrace.h>
|
||
#else
|
||
# ifdef HAVE_SYS_PTRACE_H
|
||
# include <sys/ptrace.h>
|
||
# endif
|
||
#endif
|
||
|
||
#include <sys/types.h>
|
||
#include <sys/param.h>
|
||
#include "gdbcore.h"
|
||
#include "value.h" /* For supply_register. */
|
||
#include "inferior.h" /* For ARCH_NUM_REGS. */
|
||
|
||
/* These are needed on various systems to expand REGISTER_U_ADDR. */
|
||
#ifndef USG
|
||
#include <sys/dir.h>
|
||
#include <sys/file.h>
|
||
#include "gdb_stat.h"
|
||
#include <sys/user.h>
|
||
#endif
|
||
|
||
#ifndef CORE_REGISTER_ADDR
|
||
#define CORE_REGISTER_ADDR(regno, regptr) register_addr(regno, regptr)
|
||
#endif /* CORE_REGISTER_ADDR */
|
||
|
||
#ifdef NEED_SYS_CORE_H
|
||
#include <sys/core.h>
|
||
#endif
|
||
|
||
static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));
|
||
|
||
void _initialize_core_aout PARAMS ((void));
|
||
|
||
/* Extract the register values out of the core file and store
|
||
them where `read_register' will find them.
|
||
|
||
CORE_REG_SECT points to the register values themselves, read into memory.
|
||
CORE_REG_SIZE is the size of that area.
|
||
WHICH says which set of registers we are handling (0 = int, 2 = float
|
||
on machines where they are discontiguous).
|
||
REG_ADDR is the offset from u.u_ar0 to the register values relative to
|
||
core_reg_sect. This is used with old-fashioned core files to
|
||
locate the registers in a large upage-plus-stack ".reg" section.
|
||
Original upage address X is at location core_reg_sect+x+reg_addr.
|
||
*/
|
||
|
||
static void
|
||
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
||
char *core_reg_sect;
|
||
unsigned core_reg_size;
|
||
int which;
|
||
CORE_ADDR reg_addr;
|
||
{
|
||
int regno;
|
||
CORE_ADDR addr;
|
||
int bad_reg = -1;
|
||
CORE_ADDR reg_ptr = -reg_addr; /* Original u.u_ar0 is -reg_addr. */
|
||
int numregs = ARCH_NUM_REGS;
|
||
|
||
/* If u.u_ar0 was an absolute address in the core file, relativize it now,
|
||
so we can use it as an offset into core_reg_sect. When we're done,
|
||
"register 0" will be at core_reg_sect+reg_ptr, and we can use
|
||
CORE_REGISTER_ADDR to offset to the other registers. If this is a modern
|
||
core file without a upage, reg_ptr will be zero and this is all a big
|
||
NOP. */
|
||
if (reg_ptr > core_reg_size)
|
||
reg_ptr -= KERNEL_U_ADDR;
|
||
|
||
for (regno = 0; regno < numregs; regno++)
|
||
{
|
||
addr = CORE_REGISTER_ADDR (regno, reg_ptr);
|
||
if (addr >= core_reg_size
|
||
&& bad_reg < 0)
|
||
bad_reg = regno;
|
||
else
|
||
supply_register (regno, core_reg_sect + addr);
|
||
}
|
||
|
||
if (bad_reg >= 0)
|
||
error ("Register %s not found in core file.", REGISTER_NAME (bad_reg));
|
||
}
|
||
|
||
|
||
#ifdef REGISTER_U_ADDR
|
||
|
||
/* Return the address in the core dump or inferior of register REGNO.
|
||
BLOCKEND is the address of the end of the user structure. */
|
||
|
||
CORE_ADDR
|
||
register_addr (regno, blockend)
|
||
int regno;
|
||
CORE_ADDR blockend;
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
if (regno < 0 || regno >= ARCH_NUM_REGS)
|
||
error ("Invalid register number %d.", regno);
|
||
|
||
REGISTER_U_ADDR (addr, blockend, regno);
|
||
|
||
return addr;
|
||
}
|
||
|
||
#endif /* REGISTER_U_ADDR */
|
||
|
||
|
||
/* Register that we are able to handle aout (trad-core) file formats. */
|
||
|
||
static struct core_fns aout_core_fns =
|
||
{
|
||
bfd_target_unknown_flavour,
|
||
fetch_core_registers,
|
||
NULL
|
||
};
|
||
|
||
void
|
||
_initialize_core_aout ()
|
||
{
|
||
add_core_fns (&aout_core_fns);
|
||
}
|