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93813b37 WT |
1 | /* Low-level siginfo manipulation for amd64. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
93813b37 WT |
4 | |
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. */ | |
19 | ||
1a5c2598 TT |
20 | #ifndef NAT_AMD64_LINUX_SIGINFO_H |
21 | #define NAT_AMD64_LINUX_SIGINFO_H | |
93813b37 | 22 | |
1ca8f924 YQ |
23 | #include <signal.h> /* For siginfo_t. */ |
24 | ||
93813b37 WT |
25 | /* When GDB is built as a 64-bit application on Linux, the |
26 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since | |
27 | debugging a 32-bit inferior with a 64-bit GDB should look the same | |
28 | as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit | |
3f2f6cb5 WT |
29 | conversion in-place ourselves. |
30 | In other to make this conversion independent of the system where gdb | |
31 | is compiled the most complete version of the siginfo, named as native | |
32 | siginfo, is used internally as an intermediate step. | |
33 | ||
34 | Conversion using nat_siginfo is exemplified below: | |
35 | compat_siginfo_from_siginfo or compat_x32_siginfo_from_siginfo | |
36 | ||
37 | buffer (from the kernel) -> nat_siginfo -> 32 / X32 siginfo | |
38 | ||
39 | siginfo_from_compat_x32_siginfo or siginfo_from_compat_siginfo | |
40 | ||
41 | 32 / X32 siginfo -> nat_siginfo -> buffer (to the kernel) */ | |
42 | ||
93813b37 WT |
43 | |
44 | /* Kind of siginfo fixup to be performed. */ | |
45 | ||
46 | enum amd64_siginfo_fixup_mode | |
47 | { | |
48 | FIXUP_32 = 1, /* Fixup for 32bit. */ | |
49 | FIXUP_X32 = 2 /* Fixup for x32. */ | |
50 | }; | |
51 | ||
52 | /* Common code for performing the fixup of the siginfo. */ | |
53 | ||
54 | int amd64_linux_siginfo_fixup_common (siginfo_t *native, gdb_byte *inf, | |
55 | int direction, | |
56 | enum amd64_siginfo_fixup_mode mode); | |
57 | ||
1a5c2598 | 58 | #endif /* NAT_AMD64_LINUX_SIGINFO_H */ |