125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/* Machine independent GDB support for core files on systems using "regsets".
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Copyright (C) 1993-1996, 1998-2000, 2003, 2007-2012 Free Software
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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 3 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, see <http://www.gnu.org/licenses/>. */
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/* This file is used by most systems that use ELF for their core
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dumps. This includes most systems that have SVR4-ish variant of
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/proc. For these systems, the registers are laid out the same way
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in core files as in the gregset_t and fpregset_t structures that
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are used in the interaction with /proc (Irix 4 is an exception and
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therefore doesn't use this file). Quite a few systems without a
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SVR4-ish /proc define these structures too, and can make use of
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this code too. */
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#include "defs.h"
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#include "command.h"
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#include "gdbcore.h"
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#include "inferior.h"
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#include "target.h"
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#include "regcache.h"
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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 <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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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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/* Provide registers to GDB from a core file.
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CORE_REG_SECT points to an array of bytes, which are the contents
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of a `note' from a core file which BFD thinks might contain
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register contents. CORE_REG_SIZE is its size.
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WHICH says which register set corelow suspects this is:
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0 --- the general-purpose register set, in gregset_t format
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2 --- the floating-point register set, in fpregset_t format
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REG_ADDR is ignored. */
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static void
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fetch_core_registers (struct regcache *regcache,
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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)
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{
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gdb_gregset_t gregset;
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gdb_fpregset_t fpregset;
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gdb_gregset_t *gregset_p = &gregset;
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gdb_fpregset_t *fpregset_p = &fpregset;
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switch (which)
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{
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case 0:
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if (core_reg_size != sizeof (gregset))
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warning (_("Wrong size gregset in core file."));
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else
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{
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memcpy (&gregset, core_reg_sect, sizeof (gregset));
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supply_gregset (regcache, (const gdb_gregset_t *) gregset_p);
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}
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break;
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case 2:
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if (core_reg_size != sizeof (fpregset))
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warning (_("Wrong size fpregset in core file."));
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else
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{
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memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
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if (gdbarch_fp0_regnum (get_regcache_arch (regcache)) >= 0)
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supply_fpregset (regcache,
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(const gdb_fpregset_t *) fpregset_p);
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}
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break;
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default:
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/* We've covered all the kinds of registers we know about here,
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so this must be something we wouldn't know what to do with
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anyway. Just ignore it. */
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break;
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}
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}
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/* Register that we are able to handle ELF core file formats using
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standard 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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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern void _initialize_core_regset (void);
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void
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_initialize_core_regset (void)
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{
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deprecated_add_core_fns (®set_core_fns);
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}
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