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c906108c SS |
1 | /* Machine independent GDB support for core files on systems using "regsets". |
2 | Copyright 1993-1998 Free Software Foundation, Inc. | |
3 | ||
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b JM |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | ||
c5aa993b | 22 | /* N O T E S |
c906108c | 23 | |
c5aa993b JM |
24 | This file is used by most systems that implement /proc. For these systems, |
25 | the general registers are laid out the same way in both the core file and | |
26 | the gregset_p structure. The current exception to this is Irix-4.*, where | |
27 | the gregset_p structure is split up into two pieces in the core file. | |
c906108c | 28 | |
c5aa993b JM |
29 | The general register and floating point register sets are manipulated by |
30 | separate ioctl's. This file makes the assumption that if FP0_REGNUM is | |
31 | defined, then support for the floating point register set is desired, | |
32 | regardless of whether or not the actual target has floating point hardware. | |
c906108c SS |
33 | |
34 | */ | |
35 | ||
36 | #include "defs.h" | |
37 | ||
38 | #include <time.h> | |
39 | #ifdef HAVE_SYS_PROCFS_H | |
40 | #include <sys/procfs.h> | |
41 | #endif | |
42 | #include <fcntl.h> | |
43 | #include <errno.h> | |
44 | #include "gdb_string.h" | |
45 | ||
46 | #include "inferior.h" | |
47 | #include "target.h" | |
48 | #include "command.h" | |
49 | #include "gdbcore.h" | |
50 | ||
c60c0f5f MS |
51 | /* Prototypes for supply_gregset etc. */ |
52 | #include "gregset.h" | |
53 | ||
a14ed312 | 54 | static void fetch_core_registers (char *, unsigned, int, CORE_ADDR); |
c906108c | 55 | |
a14ed312 | 56 | void _initialize_core_regset (void); |
c906108c SS |
57 | |
58 | /* | |
59 | ||
c5aa993b | 60 | GLOBAL FUNCTION |
c906108c | 61 | |
c5aa993b | 62 | fetch_core_registers -- fetch current registers from core file |
c906108c | 63 | |
c5aa993b | 64 | SYNOPSIS |
c906108c | 65 | |
c5aa993b JM |
66 | void fetch_core_registers (char *core_reg_sect, |
67 | unsigned core_reg_size, | |
68 | int which, CORE_ADDR reg_addr) | |
c906108c | 69 | |
c5aa993b | 70 | DESCRIPTION |
c906108c | 71 | |
c5aa993b JM |
72 | Read the values of either the general register set (WHICH equals 0) |
73 | or the floating point register set (WHICH equals 2) from the core | |
74 | file data (pointed to by CORE_REG_SECT), and update gdb's idea of | |
75 | their current values. The CORE_REG_SIZE parameter is ignored. | |
c906108c | 76 | |
c5aa993b | 77 | NOTES |
c906108c | 78 | |
c5aa993b JM |
79 | Use the indicated sizes to validate the gregset and fpregset |
80 | structures. | |
81 | */ | |
c906108c SS |
82 | |
83 | static void | |
84 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) | |
85 | char *core_reg_sect; | |
86 | unsigned core_reg_size; | |
87 | int which; | |
88 | CORE_ADDR reg_addr; /* Unused in this version */ | |
89 | { | |
90 | #if defined (HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T) | |
91 | gregset_t gregset; | |
92 | fpregset_t fpregset; | |
93 | ||
94 | if (which == 0) | |
95 | { | |
96 | if (core_reg_size != sizeof (gregset)) | |
97 | { | |
98 | warning ("wrong size gregset struct in core file"); | |
99 | } | |
100 | else | |
101 | { | |
102 | memcpy ((char *) &gregset, core_reg_sect, sizeof (gregset)); | |
103 | supply_gregset (&gregset); | |
104 | } | |
105 | } | |
106 | else if (which == 2) | |
107 | { | |
108 | if (core_reg_size != sizeof (fpregset)) | |
109 | { | |
110 | warning ("wrong size fpregset struct in core file"); | |
111 | } | |
112 | else | |
113 | { | |
114 | memcpy ((char *) &fpregset, core_reg_sect, sizeof (fpregset)); | |
60054393 MS |
115 | if (FP0_REGNUM >= 0) |
116 | supply_fpregset (&fpregset); | |
c906108c SS |
117 | } |
118 | } | |
c5aa993b | 119 | #endif /* defined(HAVE_GREGSET_T) && defined (HAVE_FPREGSET_T) */ |
c906108c | 120 | } |
c906108c | 121 | \f |
c5aa993b | 122 | |
c906108c SS |
123 | /* Register that we are able to handle ELF file formats using standard |
124 | procfs "regset" structures. */ | |
125 | ||
126 | static struct core_fns regset_core_fns = | |
127 | { | |
2acceee2 JM |
128 | bfd_target_elf_flavour, /* core_flavour */ |
129 | default_check_format, /* check_format */ | |
130 | default_core_sniffer, /* core_sniffer */ | |
131 | fetch_core_registers, /* core_read_registers */ | |
132 | NULL /* next */ | |
c906108c SS |
133 | }; |
134 | ||
135 | void | |
136 | _initialize_core_regset () | |
137 | { | |
138 | add_core_fns (®set_core_fns); | |
139 | } |