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
|
/*
* x86 MPX helpers
*
* Copyright (c) 2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#include "exec/exec-all.h"
void helper_bndck(CPUX86State *env, uint32_t fail)
{
if (unlikely(fail)) {
env->bndcs_regs.sts = 1;
raise_exception_ra(env, EXCP05_BOUND, GETPC());
}
}
static uint64_t lookup_bte64(CPUX86State *env, uint64_t base, uintptr_t ra)
{
uint64_t bndcsr, bde, bt;
if ((env->hflags & HF_CPL_MASK) == 3) {
bndcsr = env->bndcs_regs.cfgu;
} else {
bndcsr = env->msr_bndcfgs;
}
bde = (extract64(base, 20, 28) << 3) + (extract64(bndcsr, 20, 44) << 12);
bt = cpu_ldq_data_ra(env, bde, ra);
if ((bt & 1) == 0) {
env->bndcs_regs.sts = bde | 2;
raise_exception_ra(env, EXCP05_BOUND, ra);
}
return (extract64(base, 3, 17) << 5) + (bt & ~7);
}
static uint32_t lookup_bte32(CPUX86State *env, uint32_t base, uintptr_t ra)
{
uint32_t bndcsr, bde, bt;
if ((env->hflags & HF_CPL_MASK) == 3) {
bndcsr = env->bndcs_regs.cfgu;
} else {
bndcsr = env->msr_bndcfgs;
}
bde = (extract32(base, 12, 20) << 2) + (bndcsr & TARGET_PAGE_MASK);
bt = cpu_ldl_data_ra(env, bde, ra);
if ((bt & 1) == 0) {
env->bndcs_regs.sts = bde | 2;
raise_exception_ra(env, EXCP05_BOUND, ra);
}
return (extract32(base, 2, 10) << 4) + (bt & ~3);
}
uint64_t helper_bndldx64(CPUX86State *env, target_ulong base, target_ulong ptr)
{
uintptr_t ra = GETPC();
uint64_t bte, lb, ub, pt;
bte = lookup_bte64(env, base, ra);
lb = cpu_ldq_data_ra(env, bte, ra);
ub = cpu_ldq_data_ra(env, bte + 8, ra);
pt = cpu_ldq_data_ra(env, bte + 16, ra);
if (pt != ptr) {
lb = ub = 0;
}
env->mmx_t0.MMX_Q(0) = ub;
return lb;
}
uint64_t helper_bndldx32(CPUX86State *env, target_ulong base, target_ulong ptr)
{
uintptr_t ra = GETPC();
uint32_t bte, lb, ub, pt;
bte = lookup_bte32(env, base, ra);
lb = cpu_ldl_data_ra(env, bte, ra);
ub = cpu_ldl_data_ra(env, bte + 4, ra);
pt = cpu_ldl_data_ra(env, bte + 8, ra);
if (pt != ptr) {
lb = ub = 0;
}
return ((uint64_t)ub << 32) | lb;
}
void helper_bndstx64(CPUX86State *env, target_ulong base, target_ulong ptr,
uint64_t lb, uint64_t ub)
{
uintptr_t ra = GETPC();
uint64_t bte;
bte = lookup_bte64(env, base, ra);
cpu_stq_data_ra(env, bte, lb, ra);
cpu_stq_data_ra(env, bte + 8, ub, ra);
cpu_stq_data_ra(env, bte + 16, ptr, ra);
}
void helper_bndstx32(CPUX86State *env, target_ulong base, target_ulong ptr,
uint64_t lb, uint64_t ub)
{
uintptr_t ra = GETPC();
uint32_t bte;
bte = lookup_bte32(env, base, ra);
cpu_stl_data_ra(env, bte, lb, ra);
cpu_stl_data_ra(env, bte + 4, ub, ra);
cpu_stl_data_ra(env, bte + 8, ptr, ra);
}
void helper_bnd_jmp(CPUX86State *env)
{
if (!(env->hflags2 & HF2_MPX_PR_MASK)) {
memset(env->bnd_regs, 0, sizeof(env->bnd_regs));
env->hflags &= ~HF_MPX_IU_MASK;
}
}
|
