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
|
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2004 David Xu <davidxu@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/npx.h>
#include <string.h>
#include <thread_db.h>
#include "libpthread_db.h"
static int has_xmm_regs;
void
pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
{
memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4);
uc->uc_mcontext.mc_gs = r->r_gs;
}
void
pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
{
memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4);
r->r_gs = uc->uc_mcontext.mc_gs;
}
void
pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
{
if (!has_xmm_regs)
memcpy(&uc->uc_mcontext.mc_fpstate, r,
sizeof(struct save87));
else {
int i;
struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate;
memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env));
for (i = 0; i < 8; ++i)
memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10);
}
}
void
pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
{
if (!has_xmm_regs)
memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87));
else {
int i;
const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate;
memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env));
for (i = 0; i < 8; ++i)
memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10);
}
}
void
pt_fxsave_to_ucontext(const char* r, ucontext_t *uc)
{
if (has_xmm_regs)
memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm));
}
void
pt_ucontext_to_fxsave(const ucontext_t *uc, char *r)
{
if (has_xmm_regs)
memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm));
}
void
pt_md_init(void)
{
ucontext_t uc;
getcontext(&uc);
if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM)
has_xmm_regs = 1;
}
int
pt_reg_sstep(struct reg *reg, int step)
{
unsigned int old;
old = reg->r_eflags;
if (step)
reg->r_eflags |= 0x0100;
else
reg->r_eflags &= ~0x0100;
return (old != reg->r_eflags); /* changed ? */
}
|
