bits 64
default rel

global trap
global trapsz
global cat
global sel

extern scmap

section .data
sel: db 1
trapsz: dd cat-trap;
buf: db 0

section .text

trap:
	;mov rax, 60
	;syscall
	push r8
	push r9
	push r10
	push r11
	push r12
	push r13
	push r14
	push r15
	push rsi
	push rbp
	push rbx
	push rdx
	push rcx

	mov r8, [rdi]
	mov r9, [rdi+8]
	mov r10, [rdi+16]
	mov r11, [rdi+24]
	mov r12, [rdi+32]
	mov r13, [rdi+40]
	mov r14, [rdi+48]
	mov r15, [rdi+56]
	mov rsi, [rdi+72]
	mov rbp, [rdi+80]
	mov rbx, [rdi+88]
	mov rdx, [rdi+96]
	mov rax, [rdi+104]
	mov rcx, [rdi+112]

	mov rdi, [rdi+64]
	syscall
	
	pop rcx
	pop rdx
	pop rbx
	pop rbp
	pop rsi
	pop r15
	pop r14
	pop r13
	pop r12
	pop r11
	pop r10
	pop r9
	pop r8
	ret



	push rbx
	;mov ax, word [rel scmap + 2*eax]
	lea rbx, [scmap]
	lea rax, [rbx + 2*rax]
	movzx eax, ax
	pop rbx
	ret
cat:
	push r12
	push rbx
	mov r12, rdi ; fd to read
	mov rbx, rsi ; bytes to read

.l:	mov eax, 3 ; read
	mov rdi, r12
	lea rsi, [buf]
	mov rdx, 1
	syscall

	mov eax, 4 ; write
	mov rdi, 1
	lea rsi, [buf]
	mov rdx, 1
	syscall
	
	dec rbx
	jnz .l

	pop rbx
	pop r12
	ret