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fix bug in the creation of a pseudo interrupt

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by using the 64bit mode, an interrupt pushs always SS
and RSP on the stack
This commit is contained in:
Stefan Lankes 2015-06-27 20:14:18 +02:00
parent 6b0c6145d2
commit 003ee08ea7
1 changed files with 4 additions and 1 deletions
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5
hermit/arch/x86/kernel/entry.asm
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@ -566,7 +566,10 @@ switch_context:
; create on the stack a pseudo interrupt
; afterwards, we switch to the task with iret
mov rax, rdi ; rdi contains the address to store the old rsp
pushf ; RFLAGS
push QWORD 0x10 ; SS
push rsp ; RSP
add QWORD [rsp], 0x08 ; => value of rsp before the creation of a pseudo interrupt
pushfq ; RFLAGS
push QWORD 0x08 ; CS
push QWORD rollback ; RIP
push QWORD 0x00 ; Interrupt number