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using the kernel stack by calling a system call

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TODO: this version isn't optimzed!
This commit is contained in:
Stefan Lankes 2015-07-11 09:40:59 +02:00
parent ab6b9d2035
commit 07fd81de35
1 changed files with 19 additions and 19 deletions
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38
hermit/arch/x86/kernel/entry.asm
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@ -565,29 +565,29 @@ align 8
isrsyscall:
cli
; save register accross function call
;push r11
;push rbp
;push rdx
;push rcx
;push rbx
;push rdi
;push rsi
push r11
push rbp
push rdx
push rcx
push rbx
push rdi
push rsi
; get kernel stack
;call get_kernel_stack
call get_kernel_stack
; restore registers
;pop rsi
;pop rdi
;pop rbx
;pop rcx
;pop rdx
;pop rbp
;pop r11
pop rsi
pop rdi
pop rbx
pop rcx
pop rdx
pop rbp
pop r11
;xchg rsp, rax ; => rax contains original rsp
xchg rsp, rax ; => rax contains original rsp
;push rax ; contains original rsp
push rax ; contains original rsp
push r15
push r14
push r13
@ -621,8 +621,8 @@ isrsyscall:
pop r13
pop r14
pop r15
;pop r10
;mov rsp, r10
pop r10
mov rsp, r10
sti
o64 sysret