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
|
#include "vmhdr.h"
/* Set the control flags for a region.
**
** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
*/
#if __STD_C
int vmset(reg Vmalloc_t* vm, int flags, int on)
#else
int vmset(vm, flags, on)
reg Vmalloc_t* vm; /* region being worked on */
int flags; /* flags must be in VM_FLAGS */
int on; /* !=0 if turning on, else turning off */
#endif
{
reg int mode;
reg Vmdata_t* vd = vm->data;
if(flags == 0 && on == 0)
return vd->mode;
if(!(vd->mode&VM_TRUST) )
{ if(ISLOCK(vd,0))
return 0;
SETLOCK(vd,0);
}
mode = vd->mode;
if(on)
vd->mode |= (flags&VM_FLAGS);
else vd->mode &= ~(flags&VM_FLAGS);
if(vd->mode&(VM_TRACE|VM_MTDEBUG))
vd->mode &= ~VM_TRUST;
CLRLOCK(vd,0);
return mode;
}
|
