AT&T ASSEMBLY FOR LINUX AND MAC (SYS_FORK)
Fork() in C: (sys_fork.c)
#include <stdio.h> #include <stdlib.h> #include <unistd.h> int main(void) { fork(); printf("Hello Landpack\n"); return 0; }
Fork() in AT&T for Linux:(sys_fork.s)
.section .rodata msg: .ascii "Hello Landpack\n" len = .-msg .section .bass .section .text .globl _start _start: movl $2,%eax # sys_fork number (2) int $0x80 # As we know,if we fork() in C # we will run the double process # They almost have the same code and data movl $4,%eax # sys_write number (4) movl $1,%ebx # STDOUT_FILENO == (1) movl $msg,%ecx # The head address of msg movl $len,%edx # The offset of addr int $0x80 movl $1,%eax movl $0,%ebx int $0x80
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