pipe.c

一个嵌入式C库

/* Copyright (C) 2001 Lineo, <[e-mail]> */

#include <errno.h>
#include <unistd.h>
#include <syscall.h>

int pipe(int *fd)
{
	long __res, __res2;
	__asm__ __volatile__ (
      "mov		%2,	r3;"
      "mov		%3,	r4;"
      "trapa	#0x13;"
      "mov	    r1, %1;"
	  : "=z" (__res),
	    "=r" ((long) __res2)
	  : "r" ((long) __NR_pipe),
	    "r" ((long) fd)
	  : "cc", "memory", "r1", "r3", "r4");
	if ((unsigned long)(__res) >= (unsigned long)(-125)) {
		int __err = -(__res);
		errno = __err;
		return(-1);
	}
	fd[0] = __res;
	fd[1] = __res2;
	return(0);
}