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/* 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 "gdb_dirent.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, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_core_registers, /* core_read_registers */
NULL /* next */
};
void
_initialize_core_aout ()
{
add_core_fns (&aout_core_fns);
}
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