socket.s

Glibc 2.3.2源代码(解压后有100多M)

/* Copyright (C) 1995, 1996, 1997, 1999 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-cancel.h>
#include <socketcall.h>

#define P(a, b) P2(a, b)
#define P2(a, b) a##b

/* The socket-oriented system calls are handled unusally in Linux.
   They are all gated through the single `socketcall' system call number.
   `socketcall' takes two arguments: the first is the subcode, specifying
   which socket function is being called; and the second is a pointer to
   the arguments to the specific function.

   The .S files for the other calls just #define socket and #include this.
   They also #define a 'number-of-arguments' word in NARGS, which
   defaults to 3.  */

#ifndef NARGS
#ifdef socket
#error NARGS not defined
#endif
#define NARGS 3
#endif

#define stackblock 20

#ifndef __socket
#define __socket P(__,socket)
#endif

	.text
ENTRY(__socket)
	stwu r1,-48(r1)
#if NARGS >= 1
	stw  r3,stackblock(r1)
#endif
#if NARGS >= 2
	stw  r4,4+stackblock(r1)
#endif
#if NARGS >= 3
	stw  r5,8+stackblock(r1)
#endif
#if NARGS >= 4
	stw  r6,12+stackblock(r1)
#endif
#if NARGS >= 5
	stw  r7,16+stackblock(r1)
#endif
#if NARGS >= 6
	stw  r8,20+stackblock(r1)
#endif
#if NARGS >= 7
	stw  r9,24+stackblock(r1)
#endif
#if NARGS >= 8
	stw  r10,28+stackblock(r1)
#endif
#if NARGS >= 9
#error too many arguments!
#endif

#if defined NEED_CANCELLATION && defined CENABLE
	SINGLE_THREAD_P
	bne-	.Lsocket_cancel
#endif

	li	r3,P(SOCKOP_,socket)
	addi	r4,r1,stackblock
	DO_CALL(SYS_ify(socketcall))
	addi	r1,r1,48
	PSEUDO_RET

#if defined NEED_CANCELLATION && defined CENABLE
.Lsocket_cancel:
	mflr	r9
	stw	r9,52(r1)
	CENABLE
	stw	r3,16(r1)
	li	r3,P(SOCKOP_,socket)
	addi	r4,r1,stackblock
	DO_CALL(SYS_ify(socketcall))
	mfcr	r0
	stw	r3,8(r1)
	stw	r0,12(r1)
	lwz	r3,16(r1)
	CDISABLE
	lwz	r4,52(r1)
	lwz	r0,12(r1)
	lwz	r3,8(r1)
	mtlr	r4
	mtcr	r0
	addi	r1,r1,48
	PSEUDO_RET
#endif

PSEUDO_END (__socket)

weak_alias (__socket, socket)