mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-18 08:51:06 +00:00
60f9423b6b
This patch consolidates the send Linux syscall implementation on
sysdeps/unix/sysv/linux/send{to}.c. The changes are:
1. Remove send from auto-generation syscalls.list on the architecture
that uses __NR_send.
2. Define __NR_send for architectures that supports it. It was done instead
of defining in default kernel-features.h because current Linux practice
for new ports are to implement only __NR_sendto [1] and it will
require adding new kernel-features for ports that do not require it
(aarch64 for instance).
3. Remove __ASSUME_SENDTO_FOR_SEND_SYSCALL and decide to use
__NR_sendto for send generation based on __ASSUME_SENDTO_SYSCALL.
Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/sysdep.h (HAVE_INTERNAL_SEND_SYMBOL):
Define.
* sysdeps/unix/sysv/linux/aarch64/sysdep.h
(HAVE_INTERNAL_SEND_SYMBOL): Undefine.
* sysdeps/unix/sysv/linux/nios2/sysdep.h
(HAVE_INTERNAL_SEND_SYMBOL): Likewise.
* sysdeps/unix/sysv/linux/tile/sysdep.h
(HAVE_INTERNAL_SEND_SYMBOL): Likewise.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h
(__ASSUME_RECV_SYSCALL): Define.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/hppa/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/ia64/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Remove define.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove send from
auto-generation list.
* sysdeps/unix/sysv/linux/arm/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list: Likewike.
* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/send.c: Simplify includes.
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Replace by
__ASSUME_SENDTO_SYSCALL.
* sysdeps/unix/sysv/linux/x86_64/send.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/send.c: Likewise.
* sysdeps/unix/sysv/linux/generic/send.c: Likewise.
69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/* Copyright (C) 2015-2017 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 <bits/wordsize.h>
|
|
#include <kernel-features.h>
|
|
|
|
/* Set error number and return -1. A target may choose to return the
|
|
internal function, __syscall_error, which sets errno and returns -1.
|
|
We use -1l, instead of -1, so that it can be casted to (void *). */
|
|
#define INLINE_SYSCALL_ERROR_RETURN_VALUE(err) \
|
|
({ \
|
|
__set_errno (err); \
|
|
-1l; \
|
|
})
|
|
|
|
/* Provide a dummy argument that can be used to force register
|
|
alignment for register pairs if required by the syscall ABI. */
|
|
#ifdef __ASSUME_ALIGNED_REGISTER_PAIRS
|
|
#define __ALIGNMENT_ARG 0,
|
|
#define __ALIGNMENT_COUNT(a,b) b
|
|
#else
|
|
#define __ALIGNMENT_ARG
|
|
#define __ALIGNMENT_COUNT(a,b) a
|
|
#endif
|
|
|
|
/* Provide a common macro to pass 64-bit value on syscalls. */
|
|
#if __WORDSIZE == 64 || defined __ASSUME_WORDSIZE64_ILP32
|
|
# define SYSCALL_LL(val) (val)
|
|
# define SYSCALL_LL64(val) (val)
|
|
#else
|
|
#define SYSCALL_LL(val) \
|
|
__LONG_LONG_PAIR ((val) >> 31, (val))
|
|
#define SYSCALL_LL64(val) \
|
|
__LONG_LONG_PAIR ((long) ((val) >> 32), (long) ((val) & 0xffffffff))
|
|
#endif
|
|
|
|
/* Provide a common macro to pass 64-bit value on pread and pwrite
|
|
syscalls. */
|
|
#ifdef __ASSUME_PRW_DUMMY_ARG
|
|
# define SYSCALL_LL_PRW(val) 0, SYSCALL_LL (val)
|
|
# define SYSCALL_LL64_PRW(val) 0, SYSCALL_LL64 (val)
|
|
#else
|
|
# define SYSCALL_LL_PRW(val) __ALIGNMENT_ARG SYSCALL_LL (val)
|
|
# define SYSCALL_LL64_PRW(val) __ALIGNMENT_ARG SYSCALL_LL64 (val)
|
|
#endif
|
|
|
|
/* Provide a macro to pass the off{64}_t argument on p{readv,writev}{64}. */
|
|
#define LO_HI_LONG(val) \
|
|
(long) (val), \
|
|
(long) (((uint64_t) (val)) >> 32)
|
|
|
|
/* Exports the __send symbol on send.c linux implementation (some ABI have
|
|
it missing due the usage of a old generic version without it). */
|
|
#define HAVE_INTERNAL_SEND_SYMBOL 1
|