145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
/* Extract registers from a "standard" core file, for GDB.
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Copyright (C) 1988-1998 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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/* Typically used on systems that have a.out format executables.
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corefile.c is supposed to contain the more machine-independent
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aspects of reading registers from core files, while this file is
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more machine specific. */
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#include "defs.h"
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#ifdef HAVE_PTRACE_H
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#include <ptrace.h>
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#else
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#ifdef HAVE_SYS_PTRACE_H
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#include <sys/ptrace.h>
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#endif
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#endif
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#include <sys/types.h>
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#include <sys/param.h>
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#include "gdbcore.h"
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#include "value.h" /* For supply_register. */
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#include "inferior.h" /* For ARCH_NUM_REGS. */
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/* These are needed on various systems to expand REGISTER_U_ADDR. */
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#ifndef USG
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#include "gdb_dirent.h"
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include <sys/user.h>
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#endif
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#ifndef CORE_REGISTER_ADDR
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#define CORE_REGISTER_ADDR(regno, regptr) register_addr(regno, regptr)
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#endif /* CORE_REGISTER_ADDR */
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#ifdef NEED_SYS_CORE_H
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#include <sys/core.h>
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#endif
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static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
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void _initialize_core_aout (void);
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/* Extract the register values out of the core file and store
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them where `read_register' will find them.
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CORE_REG_SECT points to the register values themselves, read into memory.
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CORE_REG_SIZE is the size of that area.
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WHICH says which set of registers we are handling (0 = int, 2 = float
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on machines where they are discontiguous).
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REG_ADDR is the offset from u.u_ar0 to the register values relative to
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core_reg_sect. This is used with old-fashioned core files to
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locate the registers in a large upage-plus-stack ".reg" section.
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Original upage address X is at location core_reg_sect+x+reg_addr.
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*/
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static void
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fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
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CORE_ADDR reg_addr)
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{
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int regno;
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CORE_ADDR addr;
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int bad_reg = -1;
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CORE_ADDR reg_ptr = -reg_addr; /* Original u.u_ar0 is -reg_addr. */
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int numregs = ARCH_NUM_REGS;
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/* If u.u_ar0 was an absolute address in the core file, relativize it now,
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so we can use it as an offset into core_reg_sect. When we're done,
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"register 0" will be at core_reg_sect+reg_ptr, and we can use
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CORE_REGISTER_ADDR to offset to the other registers. If this is a modern
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core file without a upage, reg_ptr will be zero and this is all a big
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NOP. */
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if (reg_ptr > core_reg_size)
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reg_ptr -= KERNEL_U_ADDR;
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for (regno = 0; regno < numregs; regno++)
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{
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addr = CORE_REGISTER_ADDR (regno, reg_ptr);
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if (addr >= core_reg_size
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&& bad_reg < 0)
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bad_reg = regno;
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else
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supply_register (regno, core_reg_sect + addr);
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}
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if (bad_reg >= 0)
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error ("Register %s not found in core file.", REGISTER_NAME (bad_reg));
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}
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#ifdef REGISTER_U_ADDR
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/* Return the address in the core dump or inferior of register REGNO.
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BLOCKEND is the address of the end of the user structure. */
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CORE_ADDR
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register_addr (int regno, CORE_ADDR blockend)
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{
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CORE_ADDR addr;
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if (regno < 0 || regno >= ARCH_NUM_REGS)
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error ("Invalid register number %d.", regno);
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REGISTER_U_ADDR (addr, blockend, regno);
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return addr;
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}
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#endif /* REGISTER_U_ADDR */
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/* Register that we are able to handle aout (trad-core) file formats. */
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static struct core_fns aout_core_fns =
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{
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bfd_target_unknown_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_core_registers, /* core_read_registers */
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NULL /* next */
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};
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void
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_initialize_core_aout (void)
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{
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add_core_fns (&aout_core_fns);
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}
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