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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* GNU/Linux/x86-64 specific target description, for the remote server
for GDB.
Copyright (C) 2017 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/>. */
#include "server.h"
#include "tdesc.h"
#include "linux-x86-tdesc.h"
#include "arch/i386.h"
#include "common/x86-xstate.h"
#ifdef __x86_64__
#include "arch/amd64.h"
#endif
/* Return the right x86_linux_tdesc index for a given XCR0. Return
X86_TDESC_LAST if can't find a match. */
static enum x86_linux_tdesc
xcr0_to_tdesc_idx (uint64_t xcr0, bool is_x32)
{
if (xcr0 & X86_XSTATE_PKRU)
{
if (is_x32)
{
/* No x32 MPX and PKU, fall back to avx_avx512. */
return X86_TDESC_AVX_AVX512;
}
else
return X86_TDESC_AVX_MPX_AVX512_PKU;
}
else if (xcr0 & X86_XSTATE_AVX512)
return X86_TDESC_AVX_AVX512;
else if ((xcr0 & X86_XSTATE_AVX_MPX_MASK) == X86_XSTATE_AVX_MPX_MASK)
{
if (is_x32) /* No MPX on x32. */
return X86_TDESC_AVX;
else
return X86_TDESC_AVX_MPX;
}
else if (xcr0 & X86_XSTATE_MPX)
{
if (is_x32) /* No MPX on x32. */
return X86_TDESC_AVX;
else
return X86_TDESC_MPX;
}
else if (xcr0 & X86_XSTATE_AVX)
return X86_TDESC_AVX;
else if (xcr0 & X86_XSTATE_SSE)
return X86_TDESC_SSE;
else if (xcr0 & X86_XSTATE_X87)
return X86_TDESC_MMX;
else
return X86_TDESC_LAST;
}
static struct target_desc *i386_tdescs[X86_TDESC_LAST] = { };
#if defined __i386__ || !defined IN_PROCESS_AGENT
/* Return the target description according to XCR0. */
const struct target_desc *
i386_linux_read_description (uint64_t xcr0)
{
enum x86_linux_tdesc idx = xcr0_to_tdesc_idx (xcr0, false);
if (idx == X86_TDESC_LAST)
return NULL;
struct target_desc **tdesc = &i386_tdescs[idx];
if (*tdesc == NULL)
{
*tdesc = i386_create_target_description (xcr0, true);
init_target_desc (*tdesc);
#ifndef IN_PROCESS_AGENT
static const char *expedite_regs_i386[] = { "ebp", "esp", "eip", NULL };
(*tdesc)->expedite_regs = expedite_regs_i386;
#endif
}
return *tdesc;;
}
#endif
#ifdef __x86_64__
static target_desc *amd64_tdescs[X86_TDESC_LAST] = { };
static target_desc *x32_tdescs[X86_TDESC_LAST] = { };
const struct target_desc *
amd64_linux_read_description (uint64_t xcr0, bool is_x32)
{
enum x86_linux_tdesc idx = xcr0_to_tdesc_idx (xcr0, is_x32);
if (idx == X86_TDESC_LAST)
return NULL;
struct target_desc **tdesc = NULL;
if (is_x32)
tdesc = &x32_tdescs[idx];
else
tdesc = &amd64_tdescs[idx];
if (*tdesc == NULL)
{
*tdesc = amd64_create_target_description (xcr0, is_x32, true);
init_target_desc (*tdesc);
#ifndef IN_PROCESS_AGENT
static const char *expedite_regs_amd64[] = { "rbp", "rsp", "rip", NULL };
(*tdesc)->expedite_regs = expedite_regs_amd64;
#endif
}
return *tdesc;
}
#endif
#ifndef IN_PROCESS_AGENT
int
i386_get_ipa_tdesc_idx (const struct target_desc *tdesc)
{
for (int i = 0; i < X86_TDESC_LAST; i++)
{
if (tdesc == i386_tdescs[i])
return i;
}
/* If none tdesc is found, return the one with minimum features. */
return X86_TDESC_MMX;
}
#if defined __x86_64__
int
amd64_get_ipa_tdesc_idx (const struct target_desc *tdesc)
{
for (int i = 0; i < X86_TDESC_LAST; i++)
{
if (tdesc == amd64_tdescs[i])
return i;
}
for (int i = 0; i < X86_TDESC_LAST; i++)
{
if (tdesc == x32_tdescs[i])
return i;
}
return X86_TDESC_SSE;
}
#endif
#endif
|
