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create valid pseudo interrupt to set cs

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This commit is contained in:
Stefan Lankes 2017-08-20 10:51:52 +02:00
parent e38722c7f4
commit 3b8e6791ee
1 changed files with 6 additions and 4 deletions
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10
arch/x86/kernel/entry.asm
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@ -273,11 +273,13 @@ gdt_flush:
mov fs, eax
mov gs, eax
; create pseudo interrupt to set cs
push 0x08
push flush2
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
iretq
flush2:
ret
; The first 32 interrupt service routines (ISR) entries correspond to exceptions.
; Some exceptions will push an error code onto the stack which is specific to