1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* Native-dependent code for GNU/Linux x86 (i386 and x86-64).
Copyright (C) 1999-2024 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef NAT_X86_LINUX_H
#define NAT_X86_LINUX_H
#include "nat/linux-nat.h"
/* Format of XSAVE extended state is:
struct
{
fxsave_bytes[0..463]
sw_usable_bytes[464..511]
xstate_hdr_bytes[512..575]
extended state regions (AVX, MPX, AVX512, PKRU, etc.)
};
Same memory layout will be used for the coredump NT_X86_XSTATE
representing the XSAVE extended state registers.
The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled
extended state mask, which is the same as the extended control register
0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask
together with the mask saved in the xstate_hdr_bytes to determine what
states the processor/OS supports and what state, used or initialized,
the process/thread is in. */
#define I386_LINUX_XSAVE_XCR0_OFFSET 464
/* Set whether our local mirror of LWP's debug registers has been
changed since the values were last written to the thread. Nonzero
indicates that a change has been made, zero indicates no change. */
extern void lwp_set_debug_registers_changed (struct lwp_info *lwp,
int value);
/* Return nonzero if our local mirror of LWP's debug registers has
been changed since the values were last written to the thread,
zero otherwise. */
extern int lwp_debug_registers_changed (struct lwp_info *lwp);
/* Function to call when a new thread is detected. */
extern void x86_linux_new_thread (struct lwp_info *lwp);
/* Function to call when a thread is being deleted. */
extern void x86_linux_delete_thread (struct arch_lwp_info *arch_lwp);
/* Function to call prior to resuming a thread. */
extern void x86_linux_prepare_to_resume (struct lwp_info *lwp);
/* Return value from x86_linux_ptrace_get_arch_size function. Indicates if
a thread is 32-bit, 64-bit, or x32. */
struct x86_linux_arch_size
{
explicit x86_linux_arch_size (bool is_64bit, bool is_x32)
: m_is_64bit (is_64bit),
m_is_x32 (is_x32)
{
/* Nothing. */
}
bool is_64bit () const
{ return m_is_64bit; }
bool is_x32 () const
{ return m_is_x32; }
private:
bool m_is_64bit = false;
bool m_is_x32 = false;
};
/* Use ptrace calls to figure out if thread TID is 32-bit, 64-bit, or
64-bit running in x32 mode. */
extern x86_linux_arch_size x86_linux_ptrace_get_arch_size (int tid);
#endif /* NAT_X86_LINUX_H */
|
