diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/accept4.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/accept4.S | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/accept4.S b/sysdeps/unix/sysv/linux/i386/accept4.S deleted file mode 100644 index 6ed8395d09..0000000000 --- a/sysdeps/unix/sysv/linux/i386/accept4.S +++ /dev/null @@ -1,177 +0,0 @@ -/* Copyright (C) 1995-2015 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> -#include <tls.h> -#include <kernel-features.h> - -#define EINVAL 22 -#define ENOSYS 38 - -#ifdef __ASSUME_ACCEPT4_SOCKETCALL -# define errlabel SYSCALL_ERROR_LABEL -#else -# define errlabel .Lerr - .data -have_accept4: - .long 0 -#endif - - .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. */ - -.globl __libc_accept4 -ENTRY (__libc_accept4) -#ifdef 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. */ - - movl $SOCKOP_accept4, %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 errlabel - - /* Successful; return the syscall's value. */ - ret - - -#ifdef 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. */ - - movl $SOCKOP_accept4, %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 errlabel - - /* Successful; return the syscall's value. */ - ret -#endif - -#ifndef __ASSUME_ACCEPT4_SOCKETCALL - /* The kernel returns -EINVAL for unknown socket operations. - We need to convert that error to an ENOSYS error. */ -.Lerr: cmpl $-EINVAL, %eax - jne SYSCALL_ERROR_LABEL - - /* Save registers. */ - pushl %ebx - cfi_adjust_cfa_offset(4) - cfi_offset(ebx, -8) - -# ifdef PIC - SETUP_PIC_REG (dx) - addl $_GLOBAL_OFFSET_TABLE_, %edx - movl have_accept4@GOTOFF(%edx), %eax -# else - movl have_accept4, %eax -# endif - testl %eax, %eax - jne 1f - - /* Try another call, this time with the FLAGS parameter - cleared and an invalid file descriptor. This call will not - cause any harm and it will return immediately. */ - movl $-1, 8(%esp) - movl $0, 20(%esp) - - movl $SYS_ify(socketcall), %eax /* System call number in %eax. */ - - movl $SOCKOP_accept4, %ebx /* Subcode is first arg to syscall. */ - lea 8(%esp), %ecx /* Address of args is 2nd arg. */ - - /* Do the system call trap. */ - ENTER_KERNEL - - cmpl $-EINVAL, %eax - movl $-1, %eax - je 3f - movl $1, %eax -3: -# ifdef PIC - movl %eax, have_accept4@GOTOFF(%edx) -# else - movl %eax, have_accept4 -# endif - - testl %eax, %eax - -1: movl $-EINVAL, %eax - jns 2f - movl $-ENOSYS, %eax - - /* Restore registers. */ -2: popl %ebx - cfi_restore (ebx) - - jmp SYSCALL_ERROR_LABEL -#endif -PSEUDO_END (__libc_accept4) - -weak_alias (__libc_accept4, accept4) |