]>
Commit | Line | Data |
---|---|---|
041a4212 JB |
1 | /* Native-dependent code for FreeBSD x86. |
2 | ||
213516ef | 3 | Copyright (C) 2022-2023 Free Software Foundation, Inc. |
041a4212 JB |
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 | ||
20 | #include "defs.h" | |
21 | #include "x86-fbsd-nat.h" | |
24ef2641 JB |
22 | #ifdef PT_GETXSTATE_INFO |
23 | #include "nat/x86-xstate.h" | |
24 | #endif | |
041a4212 JB |
25 | |
26 | /* Implement the virtual fbsd_nat_target::low_new_fork method. */ | |
27 | ||
28 | void | |
29 | x86_fbsd_nat_target::low_new_fork (ptid_t parent, pid_t child) | |
30 | { | |
31 | struct x86_debug_reg_state *parent_state, *child_state; | |
32 | ||
33 | /* If there is no parent state, no watchpoints nor breakpoints have | |
34 | been set, so there is nothing to do. */ | |
35 | parent_state = x86_lookup_debug_reg_state (parent.pid ()); | |
36 | if (parent_state == nullptr) | |
37 | return; | |
38 | ||
39 | /* The kernel clears debug registers in the new child process after | |
40 | fork, but GDB core assumes the child inherits the watchpoints/hw | |
41 | breakpoints of the parent, and will remove them all from the | |
42 | forked off process. Copy the debug registers mirrors into the | |
43 | new process so that all breakpoints and watchpoints can be | |
44 | removed together. */ | |
45 | ||
46 | child_state = x86_debug_reg_state (child); | |
47 | *child_state = *parent_state; | |
48 | } | |
24ef2641 JB |
49 | |
50 | #ifdef PT_GETXSTATE_INFO | |
51 | void | |
52 | x86_fbsd_nat_target::probe_xsave_layout (pid_t pid) | |
53 | { | |
54 | if (m_xsave_probed) | |
55 | return; | |
56 | ||
57 | m_xsave_probed = true; | |
58 | ||
59 | if (ptrace (PT_GETXSTATE_INFO, pid, (PTRACE_TYPE_ARG3) &m_xsave_info, | |
60 | sizeof (m_xsave_info)) != 0) | |
61 | return; | |
62 | if (m_xsave_info.xsave_len != 0) | |
63 | m_xsave_layout = x86_fetch_xsave_layout (m_xsave_info.xsave_mask, | |
64 | m_xsave_info.xsave_len); | |
65 | } | |
66 | #endif |