syscall.s

来自「Glibc 2.3.2源代码(解压后有100多M)」· S 代码 · 共 32 行

/* `syscall' function for Sequent Symmetry running Dynix version 3.
   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>

.text
.globl syscall_error
.align 4
ENTRY (syscall)
	leal 8(%esp), %ecx	/* Load address of second argument.  */
	movl $SYS_HANDLER, %eax	/* Use BSD system calls.  */
	movw 4(%esp), %ax	/* Load system call number into low word.  */
	int $T_SVC6		/* Pretend it takes six args.  */
	jb syscall_error
	ret