1 /* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
2 Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
3 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "linux-low.h"
30 /* This module only supports access to the general purpose registers. */
32 #define i386_num_regs 16
34 /* This stuff comes from i386-linux-nat.c. */
36 /* Mapping between the general-purpose registers in `struct user'
37 format and GDB's register array layout. */
38 static int i386_regmap
[] =
40 EAX
* 4, ECX
* 4, EDX
* 4, EBX
* 4,
41 UESP
* 4, EBP
* 4, ESI
* 4, EDI
* 4,
42 EIP
* 4, EFL
* 4, CS
* 4, SS
* 4,
43 DS
* 4, ES
* 4, FS
* 4, GS
* 4
47 i386_cannot_store_register (int regno
)
49 return (regno
>= i386_num_regs
);
53 i386_cannot_fetch_register (int regno
)
55 return (regno
>= i386_num_regs
);
59 #ifdef HAVE_LINUX_REGSETS
60 #include <sys/procfs.h>
61 #include <sys/ptrace.h>
64 i386_fill_gregset (void *buf
)
68 for (i
= 0; i
< i386_num_regs
; i
++)
69 collect_register (i
, ((char *) buf
) + i386_regmap
[i
]);
71 collect_register_by_name ("orig_eax", ((char *) buf
) + ORIG_EAX
* 4);
75 i386_store_gregset (void *buf
)
79 for (i
= 0; i
< i386_num_regs
; i
++)
80 supply_register (i
, ((char *) buf
) + i386_regmap
[i
]);
82 supply_register_by_name ("orig_eax", ((char *) buf
) + ORIG_EAX
* 4);
86 i386_fill_fpregset (void *buf
)
88 i387_cache_to_fsave (buf
);
92 i386_store_fpregset (void *buf
)
94 i387_fsave_to_cache (buf
);
98 i386_fill_fpxregset (void *buf
)
100 i387_cache_to_fxsave (buf
);
104 i386_store_fpxregset (void *buf
)
106 i387_fxsave_to_cache (buf
);
110 struct regset_info target_regsets
[] = {
111 { PTRACE_GETREGS
, PTRACE_SETREGS
, sizeof (elf_gregset_t
),
112 i386_fill_gregset
, i386_store_gregset
},
113 #ifdef HAVE_PTRACE_GETFPXREGS
114 { PTRACE_GETFPXREGS
, PTRACE_SETFPXREGS
, sizeof (elf_fpxregset_t
),
115 i386_fill_fpxregset
, i386_store_fpxregset
},
117 { PTRACE_GETFPREGS
, PTRACE_SETFPREGS
, sizeof (elf_fpregset_t
),
118 i386_fill_fpregset
, i386_store_fpregset
},
119 { 0, 0, -1, NULL
, NULL
}
122 #endif /* HAVE_LINUX_REGSETS */
124 static const char i386_breakpoint
[] = { 0xCC };
125 #define i386_breakpoint_len 1
133 fetch_inferior_registers (0);
135 collect_register_by_name ("eip", &pc
);
140 i386_set_pc (CORE_ADDR newpc
)
142 supply_register_by_name ("eip", &newpc
);
145 store_inferior_registers (0);
148 struct linux_target_ops the_low_target
= {
151 i386_cannot_fetch_register
,
152 i386_cannot_store_register
,