1 /* Machine independent GDB support for core files on systems using "regsets".
2
3 Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2003
4 Free Software Foundation, Inc.
5
6 This file is part of GDB.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* This file is used by most systems that use ELF for their core
24 dumps. This includes most systems that have SVR4-ish variant of
25 /proc. For these systems, the registers are laid out the same way
26 in core files as in the gregset_t and fpregset_t structures that
27 are used in the interaction with /proc (Irix 4 is an exception and
28 therefore doesn't use this file). Quite a few systems without a
29 SVR4-ish /proc define these structures too, and can make use of
30 this code too. */
31
32 #include "defs.h"
33 #include "command.h"
34 #include "gdbcore.h"
35 #include "inferior.h"
36 #include "target.h"
37
38 #include <fcntl.h>
39 #include <errno.h>
40 #include "gdb_string.h"
41 #include <time.h>
42 #ifdef HAVE_SYS_PROCFS_H
43 #include <sys/procfs.h>
44 #endif
45
46 /* Prototypes for supply_gregset etc. */
47 #include "gregset.h"
48
49 /* Provide registers to GDB from a core file.
50
51 CORE_REG_SECT points to an array of bytes, which are the contents
52 of a `note' from a core file which BFD thinks might contain
53 register contents. CORE_REG_SIZE is its size.
54
55 WHICH says which register set corelow suspects this is:
56 0 --- the general-purpose register set, in gregset_t format
57 2 --- the floating-point register set, in fpregset_t format
58
59 REG_ADDR is ignored. */
60
61 static void
fetch_core_registers(char * core_reg_sect,unsigned core_reg_size,int which,CORE_ADDR reg_addr)62 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
63 CORE_ADDR reg_addr)
64 {
65 gdb_gregset_t gregset;
66 gdb_fpregset_t fpregset;
67
68 switch (which)
69 {
70 case 0:
71 if (core_reg_size != sizeof (gregset))
72 warning ("Wrong size gregset in core file.");
73 else
74 {
75 memcpy (&gregset, core_reg_sect, sizeof (gregset));
76 supply_gregset (&gregset);
77 }
78 break;
79
80 case 2:
81 if (core_reg_size != sizeof (fpregset))
82 warning ("Wrong size fpregset in core file.");
83 else
84 {
85 memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
86 if (FP0_REGNUM >= 0)
87 supply_fpregset (&fpregset);
88 }
89 break;
90
91 default:
92 /* We've covered all the kinds of registers we know about here,
93 so this must be something we wouldn't know what to do with
94 anyway. Just ignore it. */
95 break;
96 }
97 }
98
99
100 /* Register that we are able to handle ELF core file formats using
101 standard procfs "regset" structures. */
102
103 static struct core_fns regset_core_fns =
104 {
105 bfd_target_elf_flavour, /* core_flavour */
106 default_check_format, /* check_format */
107 default_core_sniffer, /* core_sniffer */
108 fetch_core_registers, /* core_read_registers */
109 NULL /* next */
110 };
111
112 /* Provide a prototype to silence -Wmissing-prototypes. */
113 extern void _initialize_core_regset (void);
114
115 void
_initialize_core_regset(void)116 _initialize_core_regset (void)
117 {
118 deprecated_add_core_fns (®set_core_fns);
119 }
120