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some code cleanups

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This commit is contained in:
Stefan Lankes 2015-08-17 12:46:17 +02:00
parent 2d11d94940
commit 9c272ba688
1 changed files with 5 additions and 12 deletions
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17
hermit/arch/x86/kernel/entry.asm
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@ -67,13 +67,6 @@ align 4
SECTION .text
align 4
start64:
; initialize segment registers
mov ax, 0x00
mov ds, ax
mov es, ax
mov ss, ax
mov ax, 0x00
mov eax, DWORD [cpu_online]
cmp eax, 0
jne Lno_pml4_init
@ -388,7 +381,7 @@ switch_context:
push QWORD 0x10 ; SS
push rsp ; RSP
add QWORD [rsp], 0x08 ; => value of rsp before the creation of a pseudo interrupt
push QWORD 0x1202 ; RFLAGS
pushfq ; RFLAGS
push QWORD 0x08 ; CS
push QWORD rollback ; RIP
push QWORD 0x00 ; Interrupt number
@ -397,7 +390,7 @@ switch_context:
push rcx
push rdx
push rbx
push rsp
push QWORD [rsp+9*8]
push rbp
push rsi
push rdi
@ -435,17 +428,17 @@ Lgo1:
jmp common_switch
align 16
align 4
rollback:
ret
align 16
align 4
common_stub:
push rax
push rcx
push rdx
push rbx
push rsp
push QWORD [rsp+9*8] ; push user-space rsp, which is already on the stack
push rbp
push rsi
push rdi