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fix bug in the calculation of esp0

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This commit is contained in:
Stefan Lankes 2012-07-14 11:16:29 +02:00
parent 6259892c00
commit 3c1b270160
1 changed files with 8 additions and 2 deletions
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10
arch/x86/kernel/entry32.asm
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@ -799,8 +799,14 @@ common_switch:
xor eax, eax xor eax, eax
%endif %endif
add eax, task_state_segments add eax, task_state_segments
; set esp0 in TSS
mov [eax+4], esp ; determine and set esp0 in TSS
mov ebx, esp
mov ecx, KERNEL_STACK_SIZE-1
not ecx
and ebx, ecx
add ebx, KERNEL_STACK_SIZE-16
mov [eax+4], ebx
; call cleanup code ; call cleanup code
call finish_task_switch call finish_task_switch