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/* Copyright (C) 1996-2015 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, see
<http://www.gnu.org/licenses/>. */
#include <sysdep-cancel.h>
#include <socketcall.h>
#define P(a, b) P2(a, b)
#define P2(a, b) a##b
.text
/* 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. */
#ifndef __socket
#ifndef NO_WEAK_ALIAS
#define __socket P(__,socket)
#else
#define __socket socket
#endif
#endif
.globl __socket
ENTRY (__socket)
#ifdef NEED_CANCELLATION
# if !defined CENABLE || !defined CDISABLE
# error CENABLE and/or CDISABLE is not defined
# endif
SINGLE_THREAD_P
jne 1f
#endif
/* Save registers. */
move.l %d2, %a0
cfi_register (%d2, %a0)
move.l #SYS_ify (socketcall), %d0 /* System call number in %d0. */
/* Use ## so `socket' is a separate token that might be #define'd. */
move.l #P (SOCKOP_,socket), %d1 /* Subcode is first arg to syscall. */
lea 4(%sp), %a1 /* Address of args is 2nd arg. */
move.l %a1, %d2
/* Do the system call trap. */
trap #0
/* Restore registers. */
move.l %a0, %d2
cfi_restore (%d2)
/* %d0 is < 0 if there was an error. */
tst.l %d0
jmi SYSCALL_ERROR_LABEL
/* Successful; return the syscall's value. */
rts
#ifdef NEED_CANCELLATION
1: /* Enable asynchronous cancellation. */
CENABLE
/* Save D2. */
move.l %d2, -(%sp)
cfi_adjust_cfa_offset (4)
cfi_rel_offset (%d2, 0)
/* Save the result of CENABLE. */
move.l %d0, -(%sp)
cfi_adjust_cfa_offset (4)
/* Use ## so `socket' is a separate token that might be #define'd. */
move.l #P (SOCKOP_,socket), %d1 /* Subcode is first arg to syscall. */
lea 4+8(%sp), %a1 /* Address of args is 2nd arg. */
move.l %a1, %d2
move.l #SYS_ify (socketcall), %d0 /* System call number in %d0. */
/* Do the system call trap. */
trap #0
/* Restore cancellation. */
move.l %d0, %d2
CDISABLE
addq.l #4, %sp
cfi_adjust_cfa_offset (-4)
move.l %d2, %d0
/* Restore registers. */
move.l (%sp)+, %d2
cfi_adjust_cfa_offset (-4)
cfi_restore (%d2)
/* %d0 is < 0 if there was an error. */
tst.l %d0
jmi SYSCALL_ERROR_LABEL
/* Successful; return the syscall's value. */
rts
#endif
PSEUDO_END (__socket)
#ifndef NO_WEAK_ALIAS
weak_alias (__socket, socket)
#endif
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