mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
123 lines
3.1 KiB
ArmAsm
123 lines
3.1 KiB
ArmAsm
/* Copyright (C) 1995-2014 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>
|
|
#include <tls.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/i386.
|
|
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)
|
|
#if defined NEED_CANCELLATION && defined CENABLE
|
|
SINGLE_THREAD_P
|
|
jne 1f
|
|
#endif
|
|
|
|
/* Save registers. */
|
|
movl %ebx, %edx
|
|
cfi_register (3, 2)
|
|
|
|
movl $SYS_ify(socketcall), %eax /* System call number in %eax. */
|
|
|
|
/* Use ## so `socket' is a separate token that might be #define'd. */
|
|
movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */
|
|
lea 4(%esp), %ecx /* Address of args is 2nd arg. */
|
|
|
|
/* Do the system call trap. */
|
|
ENTER_KERNEL
|
|
|
|
/* Restore registers. */
|
|
movl %edx, %ebx
|
|
cfi_restore (3)
|
|
|
|
/* %eax is < 0 if there was an error. */
|
|
cmpl $-125, %eax
|
|
jae SYSCALL_ERROR_LABEL
|
|
|
|
/* Successful; return the syscall's value. */
|
|
ret
|
|
|
|
|
|
#if defined NEED_CANCELLATION && defined CENABLE
|
|
/* We need one more register. */
|
|
1: pushl %esi
|
|
cfi_adjust_cfa_offset(4)
|
|
|
|
/* Enable asynchronous cancellation. */
|
|
CENABLE
|
|
movl %eax, %esi
|
|
cfi_offset(6, -8) /* %esi */
|
|
|
|
/* Save registers. */
|
|
movl %ebx, %edx
|
|
cfi_register (3, 2)
|
|
|
|
movl $SYS_ify(socketcall), %eax /* System call number in %eax. */
|
|
|
|
/* Use ## so `socket' is a separate token that might be #define'd. */
|
|
movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */
|
|
lea 8(%esp), %ecx /* Address of args is 2nd arg. */
|
|
|
|
/* Do the system call trap. */
|
|
ENTER_KERNEL
|
|
|
|
/* Restore registers. */
|
|
movl %edx, %ebx
|
|
cfi_restore (3)
|
|
|
|
/* Restore the cancellation. */
|
|
xchgl %esi, %eax
|
|
CDISABLE
|
|
|
|
/* Restore registers. */
|
|
movl %esi, %eax
|
|
popl %esi
|
|
cfi_restore (6)
|
|
cfi_adjust_cfa_offset(-4)
|
|
|
|
/* %eax is < 0 if there was an error. */
|
|
cmpl $-125, %eax
|
|
jae SYSCALL_ERROR_LABEL
|
|
|
|
/* Successful; return the syscall's value. */
|
|
ret
|
|
#endif
|
|
PSEUDO_END (__socket)
|
|
|
|
#ifndef NO_WEAK_ALIAS
|
|
weak_alias (__socket, socket)
|
|
#endif
|