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/* ************************************************************************************ */
/* */
/* File : c_args.asm /_________/ */
/* Author : Joe | */
/* Date : 04/2020 | */
/* Info : Check args | */
/* / | */
/* \ / */
/* \_____/ */
/* */
/* ************************************************************************************ */
;; jo_c_args(argc: rdi, *argv[]: rsi)
;; ----------------------------------
;; returns 0 if args are invalid
;; returns 1 if args are valid
section .text
extern strncmp
global jo_c_args
jo_c_args:
cmp rdi, 0x2
jle no_args
mov rax, [rsi + 0x8 * 0x2]
cmp byte [rax + 0x0], 0x0
je no_args
push rdi
mov rdi, [rsi + 0x8 * 0x1]
push rsi
mov rsi, reference
mov rdx, reflen
call strncmp
pop rsi
pop rdi
cmp rax, 0x0
jne no_args
mov rax, 0x1
retq
no_args:
xor rax, rax
retq
section .data
reference: db "--say", 0x0
reflen: equ $ - reference
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