Consolidate pread/pread64 implementations

This patch consolidates all the pread/pread64 implementation for Linux
in only one (sysdeps/unix/sysv/linux/pread.c).  It also removes the
syscall from the auto-generation using assembly macros.

For pread{64} offset argument placement the new SYSCALL_LL{64} macro
is used.  For pread ports that do not define __NR_pread will use
__NR_pread64 and for pread64 ports that dot define __NR_pread64 will
use __NR_pread for the syscall.

Checked on x86_64, x32, i386, aarch64, and ppc64le.

	* sysdeps/unix/sysv/linux/arm/pread.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/pread64.c: Likewise.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c: Likewise.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/pread64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c: Likewise,
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/pread64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (pread): Remove
	syscall generation.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
	[__NR_pread64] (__NR_pread): Remove define.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h:
	[__NR_pread64] (__NR_pread): Likewise.
	* sysdeps/unix/sysv/linux/pread.c [__NR_pread64] (__NR_pread): Remove
	define.
	(__libc_pread): Use SYSCALL_LL macro on offset argument.
	* sysdeps/unix/sysv/linux/pread64.c [__NR_pread64] (__NR_pread):
	Remove define.
	(__libc_pread64): Use SYSCALL_LL64 macro on offset argument.
	* sysdeps/unix/sysv/linux/sh/pread.c: Rewrite using default
	Linux implementation as base.
	* sysdeps/unix/sysv/linux/sh/pread64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/pread.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/pread64.c: Likewise.
This commit is contained in:
Adhemerval Zanella 2015-10-21 10:03:31 -02:00 committed by Adhemerval Zanella
parent eeddfa91cb
commit 77a4fbd536
18 changed files with 53 additions and 414 deletions

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@ -1,5 +1,30 @@
2016-04-11 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/arm/pread.c: Remove file.
* sysdeps/unix/sysv/linux/arm/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c: Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c: Likewise,
* sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (pread): Remove
syscall generation.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
[__NR_pread64] (__NR_pread): Remove define.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h:
[__NR_pread64] (__NR_pread): Likewise.
* sysdeps/unix/sysv/linux/pread.c [__NR_pread64] (__NR_pread): Remove
define.
(__libc_pread): Use SYSCALL_LL macro on offset argument.
* sysdeps/unix/sysv/linux/pread64.c [__NR_pread64] (__NR_pread):
Remove define.
(__libc_pread64): Use SYSCALL_LL64 macro on offset argument.
* sysdeps/unix/sysv/linux/sh/pread.c: Rewrite using default
Linux implementation as base.
* sysdeps/unix/sysv/linux/sh/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/mips/pread.c: Likewise.
* sysdeps/unix/sysv/linux/mips/pread64.c: Likewise.
* sysdeps/unix/sysv/linux/generic/sysdep.h (__ALIGNMENT_ARG): Move
definition.
(__ALIGNMENT_COUNT): Likewise.

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@ -1,36 +0,0 @@
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
ssize_t
__libc_pread (int fd, void *buf, size_t count, off_t offset)
{
/* In the ARM EABI, 64-bit values are aligned to even/odd register
pairs for syscalls. */
return SYSCALL_CANCEL (pread64, fd, buf, count, 0,
__LONG_LONG_PAIR (offset >> 31, offset));
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)

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@ -1,37 +0,0 @@
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
ssize_t
__libc_pread64 (int fd, void *buf, size_t count, off64_t offset)
{
/* In the ARM EABI, 64-bit values are aligned to even/odd register
pairs for syscalls. */
return SYSCALL_CANCEL (pread64, fd, buf, count, 0,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)));
}
weak_alias (__libc_pread64, __pread64)
weak_alias (__libc_pread64, pread64)

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@ -1,37 +0,0 @@
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <assert.h>
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
ssize_t
__libc_pread (int fd, void *buf, size_t count, off_t offset)
{
assert (sizeof (offset) == 4);
return SYSCALL_CANCEL (pread64, fd,
buf, count, __ALIGNMENT_ARG
__LONG_LONG_PAIR (offset >> 31, offset));
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)

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@ -1,34 +0,0 @@
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
ssize_t
__libc_pread64 (int fd, void *buf, size_t count, off64_t offset)
{
return SYSCALL_CANCEL (pread64, fd, buf, count, __ALIGNMENT_ARG
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)));
}
weak_alias (__libc_pread64, __pread64) weak_alias (__libc_pread64, pread64)

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@ -39,4 +39,5 @@
pass 64-bits values through syscalls. */
#if _MIPS_SIM == _ABIN32
# define __ASSUME_WORDSIZE64_ILP32 1
# define __ASSUME_OFF_DIFF_OFF64 1
#endif

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@ -1,54 +0,0 @@
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <assert.h>
#include <errno.h>
#ifndef NO_SGIDEFS_H
#include <sgidefs.h>
#endif
#include <unistd.h>
#include <endian.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
ssize_t
__libc_pread (int fd, void *buf, size_t count, off_t offset)
{
#if _MIPS_SIM != _ABI64
assert (sizeof (offset) == 4);
#endif
#if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64
return SYSCALL_CANCEL (pread, fd, buf, count, offset);
#else
return SYSCALL_CANCEL (pread, fd, buf, count, 0,
__LONG_LONG_PAIR (offset >> 31, offset));
#endif
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)

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@ -1,50 +0,0 @@
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <errno.h>
#ifndef NO_SGIDEFS_H
#include <sgidefs.h>
#endif
#include <unistd.h>
#include <endian.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
ssize_t
__libc_pread64 (int fd, void *buf, size_t count, off64_t offset)
{
#if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64
return SYSCALL_CANCEL (pread, fd, buf, count, offset);
#else
return SYSCALL_CANCEL (pread, fd, buf, count, 0,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)));
#endif
}
weak_alias (__libc_pread64, __pread64)
weak_alias (__libc_pread64, pread64)

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@ -1,34 +0,0 @@
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <assert.h>
#include <errno.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
ssize_t
__libc_pread (int fd, void *buf, size_t count, off_t offset)
{
/* On PPC32 64bit values are aligned in odd/even register pairs. */
return SYSCALL_CANCEL (pread, fd, buf, count, 0, offset >> 31, offset);
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)

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@ -1,35 +0,0 @@
/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 <errno.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
ssize_t
__libc_pread64 (int fd, void *buf, size_t count, off64_t offset)
{
/* On PPC32 64bit values are aligned in odd/even register pairs. */
return SYSCALL_CANCEL (pread, fd, buf, count, 0, (long) (offset >> 32),
(long) offset);
}
weak_alias (__libc_pread64, __pread64)
weak_alias (__libc_pread64, pread64)

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@ -26,13 +26,6 @@
Handle them here so they can be catched by both C and assembler stubs in
glibc. */
#ifdef __NR_pread64
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
#ifdef __NR_pwrite64
# ifdef __NR_pwrite
# error "__NR_pwrite and __NR_pwrite64 both defined???"

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@ -33,13 +33,6 @@
Handle them here so they can be catched by both C and assembler stubs in
glibc. */
#ifdef __NR_pread64
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
#ifdef __NR_pwrite64
# ifdef __NR_pwrite
# error "__NR_pwrite and __NR_pwrite64 both defined???"

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@ -16,33 +16,22 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
#if __WORDSIZE != 64 || defined (__ASSUME_OFF_DIFF_OFF64)
# ifndef __NR_pread
# define __NR_pread __NR_pread64
#endif
# endif
ssize_t
__libc_pread (int fd, void *buf, size_t count, off_t offset)
{
ssize_t result;
assert (sizeof (offset) == 4);
result = SYSCALL_CANCEL (pread, fd, buf, count,
__LONG_LONG_PAIR (offset >> 31, offset));
return result;
return SYSCALL_CANCEL (pread, fd, buf, count,
__ALIGNMENT_ARG SYSCALL_LL (offset));
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)
#endif

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@ -16,28 +16,25 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#ifndef __NR_pread64
# define __NR_pread64 __NR_pread
#endif
ssize_t
__libc_pread64 (int fd, void *buf, size_t count, off64_t offset)
{
return SYSCALL_CANCEL (pread, fd, buf, count,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)));
return SYSCALL_CANCEL (pread64, fd, buf, count,
__ALIGNMENT_ARG SYSCALL_LL64 (offset));
}
weak_alias (__libc_pread64, __pread64)
weak_alias (__libc_pread64, pread64)
#if __WORDSIZE == 64 && !defined (__ASSUME_OFF_DIFF_OFF64)
strong_alias (__libc_pread64, __libc_pread)
weak_alias (__libc_pread64, __pread)
weak_alias (__libc_pread64, pread)
#endif

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@ -16,28 +16,8 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <endian.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
ssize_t
__libc_pread (int fd, void *buf, size_t count, off_t offset)
{
return SYSCALL_CANCEL (pread, fd, buf, count, 0,
__LONG_LONG_PAIR (offset >> 31, offset));
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)
/* SH4 ABI does not really require argument alignment for 64-bits, but
the kernel interface for pread adds a dummy long argument before the
offset. */
#define __ALIGNMENT_ARG
#include <sysdeps/unix/sysv/linux/pread.c>

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@ -16,28 +16,8 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <unistd.h>
#include <endian.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
ssize_t
__libc_pread64 (int fd, void *buf, size_t count, off64_t offset)
{
return SYSCALL_CANCEL (pread, fd, buf, count, 0,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)));
}
weak_alias (__libc_pread64, __pread64)
weak_alias (__libc_pread64, pread64)
/* SH4 ABI does not really require argument alignment for 64-bits, but
the kernel interface for pread adds a dummy long argument before the
offset. */
#define __ALIGNMENT_ARG
#include <sysdeps/unix/sysv/linux/pread64.c>

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@ -1 +0,0 @@
/* Empty since the pread syscall is equivalent. */

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@ -3,7 +3,6 @@
# Whee! 64-bit systems naturally implement llseek.
llseek EXTRA lseek i:iii __libc_lseek __lseek lseek __libc_lseek64 __llseek llseek __lseek64 lseek64
lseek llseek -
pread - pread Ci:ibni __libc_pread __libc_pread64 __pread pread __pread64 pread64
pwrite - pwrite Ci:ibni __libc_pwrite __libc_pwrite64 __pwrite pwrite __pwrite64 pwrite64
fstatfs - fstatfs i:ip __fstatfs fstatfs fstatfs64 __fstatfs64
statfs - statfs i:sp __statfs statfs statfs64