Move src/modules/main -> src/kernel

src/kernel/interrupts.s

@@ -0,0 +1,121 @@
+extern g_idtr
+extern g_gdtr
+
+global idt_write
+idt_write:
+	lidt [g_idtr]
+	ret
+
+global idt_load
+idt_load:
+	sidt [g_idtr]
+	ret
+
+global gdt_write
+gdt_write:
+	lgdt [g_gdtr]
+	ret
+
+global gdt_load
+gdt_load:
+	sgdt [g_gdtr]
+	ret
+
+%macro push_all_and_segments 0
+	push rax
+	push rcx
+	push rdx
+	push rbx
+	push rsp
+	push rbp
+	push rsi
+	push rdi
+
+	mov ax, ds
+	push rax
+%endmacro
+
+%macro pop_all_and_segments 0
+	pop rax
+	mov ds, ax
+	mov es, ax
+	mov fs, ax
+	mov gs, ax
+
+	pop rdi
+	pop rsi
+	pop rbp
+	pop rsp
+	pop rbx
+	pop rdx
+	pop rcx
+	pop rax
+%endmacro
+
+%macro load_kernel_segments 0
+	mov ax, 0x10	; load the kernel data segment
+	mov ds, ax
+	mov es, ax
+	mov fs, ax
+	mov gs, ax
+%endmacro
+
+extern isr_handler
+global isr_handler_prelude
+isr_handler_prelude:
+	push_all_and_segments
+	load_kernel_segments
+
+	call isr_handler
+
+	pop_all_and_segments
+
+	add rsp, 16		; because the ISRs added err/num
+	sti
+	iretq
+
+extern irq_handler
+global irq_handler_prelude
+irq_handler_prelude:
+	push_all_and_segments
+	load_kernel_segments
+
+	call irq_handler
+
+	pop_all_and_segments
+
+	add rsp, 16		; because the ISRs added err/num
+	sti
+	iretq
+
+%macro EMIT_ISR 2
+	global %1
+	%1:
+		cli
+		push byte 0
+		push byte %2
+		jmp isr_handler_prelude
+%endmacro
+
+%macro EMIT_EISR 2
+	global %1
+	%1:
+		cli
+		push byte %2
+		jmp isr_handler_prelude
+%endmacro
+
+%macro EMIT_IRQ 2
+	global %1
+	%1:
+		cli
+		push byte 0
+		push byte %2
+		jmp irq_handler_prelude
+%endmacro
+
+%define EISR(i, name)     EMIT_EISR name, i
+%define  ISR(i, name)     EMIT_ISR name, i
+%define  IRQ(i, q, name)  EMIT_IRQ name, i
+
+%include "interrupt_isrs.inc"