1 /* Machine independent GDB support for core files on systems using "regsets".
3 Copyright (C) 1993-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* This file is used by most systems that use ELF for their core
21 dumps. This includes most systems that have SVR4-ish variant of
22 /proc. For these systems, the registers are laid out the same way
23 in core files as in the gregset_t and fpregset_t structures that
24 are used in the interaction with /proc (Irix 4 is an exception and
25 therefore doesn't use this file). Quite a few systems without a
26 SVR4-ish /proc define these structures too, and can make use of
40 #ifdef HAVE_SYS_PROCFS_H
41 #include <sys/procfs.h>
44 /* Prototypes for supply_gregset etc. */
47 /* Provide registers to GDB from a core file.
49 CORE_REG_SECT points to an array of bytes, which are the contents
50 of a `note' from a core file which BFD thinks might contain
51 register contents. CORE_REG_SIZE is its size.
53 WHICH says which register set corelow suspects this is:
54 0 --- the general-purpose register set, in gregset_t format
55 2 --- the floating-point register set, in fpregset_t format
57 REG_ADDR is ignored. */
60 fetch_core_registers (struct regcache *regcache,
62 unsigned core_reg_size,
66 gdb_gregset_t gregset;
67 gdb_fpregset_t fpregset;
68 gdb_gregset_t *gregset_p = &gregset;
69 gdb_fpregset_t *fpregset_p = &fpregset;
74 if (core_reg_size != sizeof (gregset))
75 warning (_("Wrong size gregset in core file."));
78 memcpy (&gregset, core_reg_sect, sizeof (gregset));
79 supply_gregset (regcache, (const gdb_gregset_t *) gregset_p);
84 if (core_reg_size != sizeof (fpregset))
85 warning (_("Wrong size fpregset in core file."));
88 memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
89 if (gdbarch_fp0_regnum (get_regcache_arch (regcache)) >= 0)
90 supply_fpregset (regcache,
91 (const gdb_fpregset_t *) fpregset_p);
96 /* We've covered all the kinds of registers we know about here,
97 so this must be something we wouldn't know what to do with
98 anyway. Just ignore it. */
104 /* Register that we are able to handle ELF core file formats using
105 standard procfs "regset" structures. */
107 static struct core_fns regset_core_fns =
109 bfd_target_elf_flavour, /* core_flavour */
110 default_check_format, /* check_format */
111 default_core_sniffer, /* core_sniffer */
112 fetch_core_registers, /* core_read_registers */
116 /* Provide a prototype to silence -Wmissing-prototypes. */
117 extern void _initialize_core_regset (void);
120 _initialize_core_regset (void)
122 deprecated_add_core_fns (®set_core_fns);