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Fix a mistake I made with the pcb movement relative to the stack in the

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KSE patch.  We need to leave the 16 bytes here for enabling the trapframe
to be converted to a vm86trapframe if we're switching *to* a vm86 context.
This commit is contained in:
Peter Wemm 2001-09-19 05:34:12 +00:00
parent 66f769fe39
commit 2f01a0c097
3 changed files with 6 additions and 6 deletions
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4
sys/amd64/amd64/cpu_switch.S
View File

@ -200,8 +200,8 @@ sw1b:
jmp 2f
1:
/* update common_tss.tss_esp0 pointer */
/* esp points to base of usable stack */
movl %edx, PCPU(COMMON_TSS) + TSS_ESP0 /* stack is below pcb */
leal -16(%edx), %ebx /* leave space for vm86 */
movl %ebx, PCPU(COMMON_TSS) + TSS_ESP0 /* stack is below pcb */
btrl %esi, private_tss
jae 3f
PCPU_ADDR(COMMON_TSSD, %edi)

4
sys/amd64/amd64/swtch.s
View File

@ -200,8 +200,8 @@ sw1b:
jmp 2f
1:
/* update common_tss.tss_esp0 pointer */
/* esp points to base of usable stack */
movl %edx, PCPU(COMMON_TSS) + TSS_ESP0 /* stack is below pcb */
leal -16(%edx), %ebx /* leave space for vm86 */
movl %ebx, PCPU(COMMON_TSS) + TSS_ESP0 /* stack is below pcb */
btrl %esi, private_tss
jae 3f
PCPU_ADDR(COMMON_TSSD, %edi)

4
sys/i386/i386/swtch.s
View File

@ -200,8 +200,8 @@ sw1b:
jmp 2f
1:
/* update common_tss.tss_esp0 pointer */
/* esp points to base of usable stack */
movl %edx, PCPU(COMMON_TSS) + TSS_ESP0 /* stack is below pcb */
leal -16(%edx), %ebx /* leave space for vm86 */
movl %ebx, PCPU(COMMON_TSS) + TSS_ESP0 /* stack is below pcb */
btrl %esi, private_tss
jae 3f
PCPU_ADDR(COMMON_TSSD, %edi)