/SPARTAN/trunk/arch/ia32/src/pm.c |
---|
128,6 → 128,25 |
} |
static void clean_IOPL_NT_flags(void) |
{ |
asm |
( |
"pushfl;" |
"pop %%eax;" |
"and $0xffff8fff,%%eax;" |
"push %%eax;" |
"popfl;" |
: |
: |
:"%eax" |
); |
} |
void pm_init(void) |
{ |
struct descriptor *gdt_p = (struct descriptor *) PA2KA(gdtr.base); |
165,4 → 184,6 |
* to its own TSS. We just need to load the TR register. |
*/ |
__asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES))); |
clean_IOPL_NT_flags(); |
} |