你得下载glibc源码才可以看到它的实现，以下是soket.S：
/* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include <mach/machine/alpha_instruction.h>
ENTRY (syscall)
.frame sp,0,ra
mov a0, v0 /* Load system call number from first arg. */
mov a1, a0
mov a2, a1
mov a3, a2
mov a4, a3
mov a5, a4
/* Load the remaining possible args (up to 11) from the stack. */
ldq a5,0(sp)
ldq t0,8(sp)
ldq t1,16(sp)
ldq t2,24(sp)
ldq t3,32(sp)
ldq t4,40(sp)
call_pal op_chmk
RET
.end syscall
