Remove socket.S implementation

This patch removes the socket.S implementation for all ports and replace
it by a C implementation using socketcall.  For ports that implement
the syscall directly, there is no change.

The patch idea is to simplify the socket function implementation that
uses the socketcall to be based on C implemetation instead of a pseudo
assembly implementation with arch specific parts.  The patch then remove
the assembly implementatation for the ports which uses socketcall
(i386, microblaze, mips, powerpc, sparc, m68k, s390 and sh).

I have cross-build GLIBC for afore-mentioned ports and tested on both
i386 and ppc32 without regressions.

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)