.section .text
.global x86_64_lidt
.type x86_64_lidt @function
x86_64_lidt:
    lidt (%rdi)
    sti
    retq

.macro irq_preserve
    pushq %rax
    pushq %rbx
    pushq %rcx
    pushq %rdx
    pushq %rsi
    pushq %rdi
    pushq %rbp
    pushq %r8
    pushq %r9
    pushq %r10
    pushq %r11
    pushq %r12
    pushq %r13
    pushq %r14
    pushq %r15
.endm

.macro irq_restore
    popq %r15
    popq %r14
    popq %r13
    popq %r12
    popq %r11
    popq %r10
    popq %r9
    popq %r8
    popq %rbp
    popq %rdi
    popq %rsi
    popq %rdx
    popq %rcx
    popq %rbx
    popq %rax
.endm

.global irq_stub
.type irq_stub @function
irq_stub:
    irq_preserve

    movq %rsp, %rdi
    cld

    .extern irq_handle
    call irq_handle
    movq %rax, %rsp

    irq_restore
    iretq

.extern __isr_err
.extern __isr_num

.macro isr_error num:req
.type __isr\num @function
isr\num:
    pushq %rbx
    movq 8(%rsp), %rbx
    movq %rbx, __isr_err
    popq %rbx
    addq $8, %rsp
    movq $\num, __isr_num
    jmp irq_stub
.endm

.macro isr_noerr num:req
.type __isr\num @function
isr\num:
    movq $\num, __isr_num
    jmp irq_stub
.endm

isr_noerr 0
isr_noerr 1
isr_noerr 2
isr_noerr 3
isr_noerr 4
isr_noerr 5
isr_noerr 6
isr_noerr 7
isr_error 8
isr_noerr 9
isr_error 10
isr_error 11
isr_error 12
isr_error 13
isr_error 14
isr_noerr 15
isr_noerr 16
isr_error 17
isr_noerr 18
isr_noerr 19
isr_noerr 20
isr_error 21

.section .data
.global __isr_stubs
.type __isr_stubs @object
__isr_stubs:
    .quad isr0
    .quad isr1
    .quad isr2
    .quad isr3
    .quad isr4
    .quad isr5
    .quad isr6
    .quad isr7
    .quad isr8
    .quad isr9
    .quad isr10
    .quad isr11
    .quad isr12
    .quad isr13
    .quad isr14
    .quad isr15
    .quad isr16
    .quad isr17
    .quad isr18
    .quad isr19
    .quad isr20
    .quad isr21