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
|
/*
* OpenBSD/i386 machine-dependent thread macros
*
* $OpenBSD: uthread_machdep.h,v 1.5 1999/03/10 09:50:33 d Exp $
*/
#include <machine/reg.h>
/*
* We need to extend jmp_buf to hold extended segment registers
* for WINE.
*/
typedef struct _machdep_jmp_buf {
union {
jmp_buf jb;
struct {
int eip;
int ebx;
int esp;
int ebp;
int esi;
int edi;
} jbs;
} u;
#define mjb_eip u.jbs.eip
#define mjb_ebx u.jbs.ebx
#define mjb_esp u.jbs.esp
#define mjb_ebp u.jbs.ebp
#define mjb_esi u.jbs.esi
#define mjb_edi u.jbs.edi
int mjb_ds; /* informational only - not restored */
int mjb_es; /* informational only - not restored */
int mjb_fs;
int mjb_gs;
} _machdep_jmp_buf;
/* Extra machine-dependent information */
struct _machdep_struct {
struct fpreg saved_fp; /* only saved with on signals */
};
/* Save the floating point state of a thread: */
#define _thread_machdep_save_float_state(thr) \
{ \
char *fdata = (char*)(&(thr)->_machdep.saved_fp); \
__asm__("fsave %0"::"m" (*fdata)); \
}
/* Restore the floating point state of a thread: */
#define _thread_machdep_restore_float_state(thr) \
{ \
char *fdata = (char*)(&(thr)->_machdep.saved_fp); \
__asm__("frstor %0"::"m" (*fdata)); \
}
/* Initialise the jmpbuf stack frame so it continues from entry: */
#define _thread_machdep_thread_create(thr, entry, pattr) \
{ \
/* entry */ \
(thr)->saved_jmp_buf.mjb_eip = (long) entry; \
/* stack */ \
(thr)->saved_jmp_buf.mjb_esp = (long) (thr)->stack \
+ (pattr)->stacksize_attr \
- sizeof(double); \
}
static __inline int
_thread_machdep_setjmp_helper(a)
_machdep_jmp_buf *a;
{
int v;
__asm__("mov %%ds, %0\n" : "=m" (a->mjb_ds) );
__asm__("mov %%es, %0\n" : "=m" (a->mjb_es) );
__asm__("mov %%fs, %0\n" : "=m" (a->mjb_fs) );
__asm__("mov %%gs, %0\n" : "=m" (a->mjb_gs) );
v = _setjmp(a->u.jb);
if (v) {
__asm__("mov %0, %%gs\n" :: "m" (a->mjb_gs) );
__asm__("mov %0, %%fs\n" :: "m" (a->mjb_fs) );
/* __asm__("mov %0, %%es\n" :: "m" (a->mjb_es) ); */
/* __asm__("mov %0, %%ds\n" :: "m" (a->mjb_ds) ); */
}
return (v);
}
#define _thread_machdep_longjmp(a,v) _longjmp((a).u.jb,v)
#define _thread_machdep_setjmp(a) _thread_machdep_setjmp_helper(&(a))
|
