call_pselect6.s

glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的好资料

/* Copyright (C) 2006 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <[e-mail]>, 2006.

   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>

#ifdef __NR_pselect6
	.text
ENTRY(__call_pselect6)
	.hidden __call_pselect6
	pushl	%ebx
	cfi_adjust_cfa_offset (4)
	pushl	%esi
	cfi_adjust_cfa_offset (4)
	pushl	%edi
	cfi_adjust_cfa_offset (4)
	pushl	%ebp
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (ebp, 0)
	cfi_rel_offset (edi, 4)
	cfi_rel_offset (esi, 8)
	cfi_rel_offset (ebx, 12)

	movl	$__NR_pselect6, %eax
	movl	20(%esp), %ebx
	movl	24(%esp), %ecx
	movl	28(%esp), %edx
	movl	32(%esp), %esi
	movl	36(%esp), %edi
	movl	40(%esp), %ebp

	/* The syscall handling cannot handle 6 parameters.  Yet.  */
	int	$0x80

	popl	%ebp
	cfi_adjust_cfa_offset (-4)
	cfi_restore (ebp)
	popl	%edi
	cfi_adjust_cfa_offset (-4)
	cfi_restore (edi)
	popl	%esi
	cfi_adjust_cfa_offset (-4)
	cfi_restore (esi)
	popl	%ebx
	cfi_adjust_cfa_offset (-4)
	cfi_restore (ebx)

	ret
END(__call_pselect6)
#endif