interrupt: nmi work

kernel-src/arch/x86-64/isr.asm

@@ -57,6 +57,9 @@ isr_common:
 	mov rdi, rbp ; vec
 	mov rsi, rsp ; ctx
 
+	; set this as the end of the stack frame
+	xor rbp, rbp
+
 	cld
 	extern interrupt_isr
 	call interrupt_isr
@@ -93,6 +96,78 @@ isr_common:
 	.notneeded2:
 	o64 iret
 
+global asm_nmi_handler
+asm_nmi_handler:
+	sub rsp, 8 ; error code, unused for nmi
+	push rbp
+	sub rsp, 8 ; vec number, unused for nmi
+	push rsi
+	push rdi
+	push r15
+	push r14
+	push r13
+	push r12
+	push r11
+	push r10
+	push r9
+	push r8
+	push rdx
+	push rcx
+	push rbx
+	push rax
+	mov rax, ds
+	push rax
+	mov rax, es
+	push rax
+	mov rax, fs
+	push rax
+	mov rax, gs
+	push rax
+	mov rdi,cr2
+	push rdi
+
+	; set up kernel segments
+	mov rdi, 0x10
+	mov ds, rdi
+	mov es, rdi
+
+	; save ctx pointer
+	mov rdi, rsp
+
+	; set this as the end of the stack frame
+	xor rbp, rbp
+
+	cld
+	extern arch_nmi_isr
+	call arch_nmi_isr
+	cli
+
+	; pop context
+	add rsp, 24 ; cr2 gs and fs are not popped.
+	pop rax
+	mov es,rax
+	pop rax
+	mov ds,rax
+	pop rax
+	pop rbx
+	pop rcx
+	pop rdx
+	pop r8
+	pop r9
+	pop r10
+	pop r11
+	pop r12
+	pop r13
+	pop r14
+	pop r15
+	pop rdi
+	pop rsi
+	add rsp, 8 ; vector num, unused for nmi
+	pop rbp
+	add rsp, 8 ; error code, unused for nmi
+
+	o64 iret
+
 section .rodata
 global isr_table
 isr_table: