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|
; **************************************************************************** ;
; ;
; ::: :::::::: ;
; ft_write.s :+: :+: :+: ;
; +:+ +:+ +:+ ;
; By: cacharle <marvin@42.fr> +;+ +:+ +;+ ;
; +;+;+;+;+;+ +;+ ;
; Created: 2019/11/22 03:04:47 by cacharle ;+; ;+; ;
; Updated: 2019/11/22 21:19:02 by cacharle ;;; ;;;;;;;;.fr ;
; ;
; **************************************************************************** ;
%ifdef __LINUX__
%define M_FT_WRITE ft_write
%define M_ERRNO_LOCATION __errno_location
%define M_SYSCALL_WRITE 0x1
%else
%define M_FT_WRITE _ft_write
%define M_ERRNO_LOCATION ___error
%define M_SYSCALL_WRITE 0x2000004
%endif
extern M_ERRNO_LOCATION
global M_FT_WRITE
section .text
; int ft_write(int rdi, const void *rsi, size_t rdx);
M_FT_WRITE:
mov rax, M_SYSCALL_WRITE
syscall
%ifdef __LINUX__
cmp rax, 0
jl FT_WRITE_ERROR
%else
jc FT_WRITE_ERROR
%endif
ret
FT_WRITE_ERROR:
%ifdef __LINUX__
neg rax
%endif
push rax
call M_ERRNO_LOCATION wrt ..plt
pop qword [rax]
mov rax, -1
ret
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