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137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/* Machine independent GDB support for core files on systems using "regsets".
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Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000
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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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/* N O T E S
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This file is used by most systems that implement /proc. For these systems,
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the general registers are laid out the same way in both the core file and
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the gregset_p structure. The current exception to this is Irix-4.*, where
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the gregset_p structure is split up into two pieces in the core file.
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The general register and floating point register sets are manipulated by
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separate ioctl's. This file makes the assumption that if FP0_REGNUM is
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defined, then support for the floating point register set is desired,
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regardless of whether or not the actual target has floating point hardware.
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*/
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#include "defs.h"
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#include <time.h>
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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#include <fcntl.h>
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#include <errno.h>
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#include "gdb_string.h"
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#include "inferior.h"
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#include "target.h"
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#include "command.h"
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#include "gdbcore.h"
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
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void _initialize_core_regset (void);
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/*
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GLOBAL FUNCTION
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fetch_core_registers -- fetch current registers from core file
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SYNOPSIS
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void fetch_core_registers (char *core_reg_sect,
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unsigned core_reg_size,
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int which, CORE_ADDR reg_addr)
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DESCRIPTION
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Read the values of either the general register set (WHICH equals 0)
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or the floating point register set (WHICH equals 2) from the core
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file data (pointed to by CORE_REG_SECT), and update gdb's idea of
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their current values. The CORE_REG_SIZE parameter is compared to
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the size of the gregset or fpgregset structures (as appropriate) to
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validate the size of the structure from the core file. The
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REG_ADDR parameter is ignored.
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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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#if defined (HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T)
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gregset_t gregset;
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fpregset_t fpregset;
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if (which == 0)
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{
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if (core_reg_size != sizeof (gregset))
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{
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warning ("wrong size gregset struct in core file");
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}
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else
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{
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memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset));
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supply_gregset (&gregset);
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}
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}
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else if (which == 2)
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{
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if (core_reg_size != sizeof (fpregset))
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{
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warning ("wrong size fpregset struct in core file");
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}
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else
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{
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memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset));
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if (FP0_REGNUM >= 0)
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supply_fpregset (&fpregset);
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}
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}
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#endif /* defined(HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T) */
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}
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/* Register that we are able to handle ELF file formats using standard
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procfs "regset" structures. */
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static struct core_fns regset_core_fns =
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{
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bfd_target_elf_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_regset (void)
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{
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add_core_fns (®set_core_fns);
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}
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