Panic and interrupts

Added a basic kernel panic function and interrupt support for x86_64 (mostly for exception handling)

src/arch/x86_64/isr.asm

@@ -0,0 +1,113 @@
+section .text
+
+%macro pushregs 0
+
+	push rbp
+	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
+
+
+%endmacro
+
+%macro popregs 0 
+	
+	add rsp, 8 ; cr2
+
+	pop rax
+	mov gs,rax
+	pop rax
+	mov fs,rax
+	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
+	pop rbp
+
+
+%endmacro
+
+%macro isr 2
+	
+	global %1
+	%1:
+
+	pushregs
+
+	mov rdi,rsp
+
+	cld
+	extern %2
+	call %2
+	
+	popregs
+
+	iretq
+	
+	
+%endmacro
+
+
+
+
+%macro except 2
+	
+	global %1
+	%1:
+
+	pushregs
+	
+	mov rdi,rsp
+	
+	cld
+	extern %2
+	call %2
+	
+	popregs
+
+	add rsp,8 ; remove error code
+
+	iretq
+%endmacro
+
+except asmisr_pagefault, isr_pagefault
+isr    asmisr_general, isr_general
+except asmisr_except, isr_except