Subversion Repositories HelenOS

Rev

Rev 2630 | Rev 4125 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 2630 Rev 3485
Line 56... Line 56...
56 
 *
 56 
 *
57 
 * THREAD is locked and interrupts are disabled.
 57 
 * THREAD is locked and interrupts are disabled.
58 
 */
 58 
 */
59 
void before_thread_runs_arch(void)
 59 
void before_thread_runs_arch(void)
60 
{
 60 
{
61 
    CPU->arch.tss->esp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
 61 
    uintptr_t kstk = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
62 
        SP_DELTA];
 62 
        SP_DELTA];
- 
 
 63 
 
- 
 
 64 
    /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */
- 
 
 65 
    write_msr(IA32_MSR_SYSENTER_ESP, kstk);
- 
 
 66 
 
- 
 
 67 
    /* Set kernel stack for CPL3 -> CPL0 switch via interrupt */
- 
 
 68 
    CPU->arch.tss->esp0 = kstk;
63 
    CPU->arch.tss->ss0 = selector(KDATA_DES);
 69 
    CPU->arch.tss->ss0 = selector(KDATA_DES);
64 
 
 70 
 
65 
    /* Set up TLS in GS register */
 71 
    /* Set up TLS in GS register */
66 
    set_tls_desc(THREAD->arch.tls);
 72 
    set_tls_desc(THREAD->arch.tls);
67 
 
 73