[git commit future] pread_write.c: make all archs use common code

Peter S. Mazinger ps.m at gmx.net
Wed Apr 20 10:50:38 UTC 2011


commit: http://git.uclibc.org/uClibc/commit/?id=a18a6153a0c29fb4a418dc80a975b3cdd9ed450a
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/future

c6x does not need own version at all

Signed-off-by: Peter S. Mazinger <ps.m at gmx.net>
---
 libc/sysdeps/linux/c6x/Makefile.arch     |    2 +-
 libc/sysdeps/linux/c6x/pread_write.c     |  103 ----------------
 libc/sysdeps/linux/mips/pread_write.c    |  122 +++++--------------
 libc/sysdeps/linux/powerpc/pread_write.c |  187 ++++--------------------------
 libc/sysdeps/linux/sh/pread_write.c      |  115 +++----------------
 libc/sysdeps/linux/xtensa/pread_write.c  |  189 +++--------------------------
 6 files changed, 91 insertions(+), 627 deletions(-)
 delete mode 100644 libc/sysdeps/linux/c6x/pread_write.c

diff --git a/libc/sysdeps/linux/c6x/Makefile.arch b/libc/sysdeps/linux/c6x/Makefile.arch
index 3e8dace..a7b44a7 100644
--- a/libc/sysdeps/linux/c6x/Makefile.arch
+++ b/libc/sysdeps/linux/c6x/Makefile.arch
@@ -5,7 +5,7 @@
 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 #
 
-CSRC := brk.c pread_write.c syscall.c prctl.c
+CSRC := brk.c syscall.c prctl.c
 #CSRC :=
 
 SSRC := __longjmp.S bsd-_setjmp.S bsd-setjmp.S clone.S setjmp.S _vfork.S
diff --git a/libc/sysdeps/linux/c6x/pread_write.c b/libc/sysdeps/linux/c6x/pread_write.c
deleted file mode 100644
index f985b43..0000000
--- a/libc/sysdeps/linux/c6x/pread_write.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/* vi: set sw=4 ts=4:
- *
- * Copyright (C) 2002 by Erik Andersen <andersen at uclibc.org>
- * Based in part on the files
- *		./sysdeps/unix/sysv/linux/pwrite.c,
- *		./sysdeps/unix/sysv/linux/pread.c,
- *		sysdeps/posix/pread.c
- *		sysdeps/posix/pwrite.c
- * from GNU libc 2.2.5, but reworked considerably...
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Library General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program 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 Library General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#define _LARGEFILE64_SOURCE
-#include <features.h>
-#undef __OPTIMIZE__
-/* We absolutely do _NOT_ want interfaces silently
- *  *  * renamed under us or very bad things will happen... */
-#ifdef __USE_FILE_OFFSET64
-# undef __USE_FILE_OFFSET64
-#endif
-
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/syscall.h>
-#include <unistd.h>
-#include <stdint.h>
-
-extern __typeof(pread) __libc_pread;
-extern __typeof(pwrite) __libc_pwrite;
-#ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pread64) __libc_pread64;
-extern __typeof(pwrite64) __libc_pwrite64;
-#endif
-
-#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
-
-#define __NR___syscall_pread __NR_pread
-static inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf,
-		size_t, count, off_t, offset_hi, off_t, offset_lo);
-
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	return(__syscall_pread(fd,buf,count,offset,offset >> 31));
-}
-weak_alias (__libc_pread, pread)
-
-#if defined __UCLIBC_HAS_LFS__
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-    uint32_t low = offset & 0xffffffff;
-    uint32_t high = offset >> 32;
-	return(__syscall_pread(fd, buf, count, low, high));
-}
-weak_alias (__libc_pread64, pread64)
-#endif /* __UCLIBC_HAS_LFS__  */
-
-
-#ifdef __NR_pwrite64            /* Newer kernels renamed but it's the same.  */
-# ifdef __NR_pwrite
-#  error "__NR_pwrite and __NR_pwrite64 both defined???"
-# endif
-# define __NR_pwrite __NR_pwrite64
-#endif
-
-#define __NR___syscall_pwrite __NR_pwrite
-static inline _syscall5(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
-		size_t, count, off_t, offset_hi, off_t, offset_lo);
-
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	return(__syscall_pwrite(fd,buf,count,offset,offset >> 31));
-}
-weak_alias (__libc_pwrite, pwrite)
-
-#if defined __UCLIBC_HAS_LFS__
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-    uint32_t low = offset & 0xffffffff;
-    uint32_t high = offset >> 32;
-	return(__syscall_pwrite(fd, buf, count, low, high));
-}
-weak_alias (__libc_pwrite64, pwrite64)
-#endif /* __UCLIBC_HAS_LFS__  */
-
diff --git a/libc/sysdeps/linux/mips/pread_write.c b/libc/sysdeps/linux/mips/pread_write.c
index ea6b15f..4e1210f 100644
--- a/libc/sysdeps/linux/mips/pread_write.c
+++ b/libc/sysdeps/linux/mips/pread_write.c
@@ -4,112 +4,56 @@
  *
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
-/*
- * Based in part on the files
- *		./sysdeps/unix/sysv/linux/pwrite.c,
- *		./sysdeps/unix/sysv/linux/pread.c,
- *		sysdeps/posix/pread.c
- *		sysdeps/posix/pwrite.c
- * from GNU libc 2.2.5, but reworked considerably...
- */
 
 #include <sys/syscall.h>
 #include <unistd.h>
-#include <stdint.h>
 #include <endian.h>
 #include <sgidefs.h>
 
-#ifdef __NR_pread64             /* Newer kernels renamed but it's the same.  */
-# ifdef __NR_pread
-#  error "__NR_pread and __NR_pread64 both defined???"
-# endif
+#ifdef __NR_pread64
 # define __NR_pread __NR_pread64
 #endif
 
-extern __typeof(pread) __libc_pread;
-extern __typeof(pwrite) __libc_pwrite;
-#ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pread64) __libc_pread64;
-extern __typeof(pwrite64) __libc_pwrite64;
-#endif
-
-#include <bits/kernel_types.h>
-
-
 #ifdef __NR_pread
-
-# if _MIPS_SIM == _MIPS_SIM_ABI64
-#  define __NR___libc_pread __NR_pread
-_syscall4(ssize_t, __libc_pread, int, fd, void *, buf, size_t, count, off_t, offset)
-weak_alias (__libc_pread, pread)
-#  ifdef __UCLIBC_HAS_LFS__
-#   define __NR___libc_pread64 __NR_pread
-_syscall4(ssize_t, __libc_pread64, int, fd, void *, buf, size_t, count, off64_t, offset)
-weak_alias (__libc_pread64, pread64)
-#  endif /* __UCLIBC_HAS_LFS__ */
+# if _MIPS_SIM == _MIPS_SIM_ABI64 /* glibc uses it for N32 as well */
+#  define __NR___syscall_pread __NR_pread
+static _syscall4(ssize_t, __syscall_pread, int, fd, void *, buf, size_t, count, off_t, offset)
+#  define MY_PREAD(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, offset)
+#  define MY_PREAD64(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, offset)
 # else /* O32 || N32 */
 #  define __NR___syscall_pread __NR_pread
-static __inline__ _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
-		size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	return(__syscall_pread(fd,buf,count,0,__LONG_LONG_PAIR(offset>>31,offset)));
-}
-weak_alias(__libc_pread,pread)
-
-#  ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-	uint32_t low = offset & 0xffffffff;
-	uint32_t high = offset >> 32;
-	return(__syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR (high, low)));
-}
-weak_alias(__libc_pread64,pread64)
-#  endif /* __UCLIBC_HAS_LFS__  */
-# endif /* O32 || N32 */
-
-#endif /* __NR_pread */
-
-/**********************************************************************/
-
-#ifdef __NR_pwrite64            /* Newer kernels renamed but it's the same.  */
-# ifdef __NR_pwrite
-#  error "__NR_pwrite and __NR_pwrite64 both defined???"
+static _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+#  define MY_PREAD(fd, buf, count, offset)
+	__syscall_pread(fd, buf, count, 0, OFF_HI_LO(offset))
+#  define MY_PREAD64(fd, buf, count, offset)
+	__syscall_pread(fd, buf, count, 0, OFF64_HI_LO(offset))
 # endif
+#endif
+
+#ifdef __NR_pwrite64
 # define __NR_pwrite __NR_pwrite64
 #endif
 
 #ifdef __NR_pwrite
-
-# if _MIPS_SIM == _MIPS_SIM_ABI64
-#  define __NR___libc_pwrite __NR_pwrite
-_syscall4(ssize_t, __libc_pwrite, int, fd, const void *, buf, size_t, count, off_t, offset)
-weak_alias (__libc_pwrite, pwrite)
-#  ifdef __UCLIBC_HAS_LFS__
-#   define __NR___libc_pwrite64 __NR_pwrite
-_syscall4(ssize_t, __libc_pwrite64, int, fd, const void *, buf, size_t, count, off64_t, offset)
-weak_alias (__libc_pwrite64, pwrite64)
-#  endif /* __UCLIBC_HAS_LFS__  */
+# if _MIPS_SIM == _MIPS_SIM_ABI64 /* glibc uses it for N32 as well */
+#  define __NR___syscall_pwrite __NR_pwrite
+static _syscall4(ssize_t, __syscall_pwrite, int, fd, const void *, buf, size_t, count, off_t, offset)
+#  define MY_PWRITE(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, offset)
+#  define MY_PWRITE64(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, offset)
 # else /* O32 || N32 */
 #  define __NR___syscall_pwrite __NR_pwrite
-static __inline__ _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
-		size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	return(__syscall_pwrite(fd,buf,count,0,__LONG_LONG_PAIR(offset>>31,offset)));
-}
-weak_alias(__libc_pwrite,pwrite)
+static _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+#  define MY_PWRITE(fd, buf, count, offset)
+	__syscall_pwrite(fd, buf, count, 0, OFF_HI_LO(offset))
+#  define MY_PWRITE64(fd, buf, count, offset)
+	__syscall_pwrite(fd, buf, count, 0, OFF64_HI_LO(offset))
+# endif
+#endif
 
-#  ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-	uint32_t low = offset & 0xffffffff;
-	uint32_t high = offset >> 32;
-	return(__syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR (high, low)));
-}
-weak_alias(__libc_pwrite64,pwrite64)
-#  endif /* __UCLIBC_HAS_LFS__  */
-# endif /* O32 || N32 */
-#endif /* __NR_pwrite */
+#include "../common/pread_write.c"
diff --git a/libc/sysdeps/linux/powerpc/pread_write.c b/libc/sysdeps/linux/powerpc/pread_write.c
index 7f988d3..dcc6967 100644
--- a/libc/sysdeps/linux/powerpc/pread_write.c
+++ b/libc/sysdeps/linux/powerpc/pread_write.c
@@ -1,183 +1,40 @@
-/* vi: set sw=4 ts=4:
- *
+/* vi: set sw=4 ts=4: */
+/*
  * Copyright (C) 2000-2006 Erik Andersen <andersen at uclibc.org>
  *
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
-/* Based in part on the files
- *		./sysdeps/unix/sysv/linux/pwrite.c,
- *		./sysdeps/unix/sysv/linux/pread.c,
- *		sysdeps/posix/pread.c
- *		sysdeps/posix/pwrite.c
- * from GNU libc 2.2.5, but reworked considerably...
- */
 
 #include <sys/syscall.h>
 #include <unistd.h>
 #include <endian.h>
 
-#ifndef __UCLIBC_HAS_LFS__
-# define off64_t off_t
+#ifdef __NR_pread64
+# define __NR_pread __NR_pread64
 #endif
 
 #ifdef __NR_pread
-extern __typeof(pread) __libc_pread;
 # define __NR___syscall_pread __NR_pread
-static __inline__ _syscall6(ssize_t, __syscall_pread, int, fd,
-		void *, buf, size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	return(__syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR(offset >> 31, offset)));
-}
-weak_alias(__libc_pread,pread)
-
-# ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pread64) __libc_pread64;
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-	return(__syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR(offset >> 32, offset)));
-}
-weak_alias(__libc_pread64,pread64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* __NR_pread */
+static _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+# define MY_PREAD(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, 0, OFF_HI_LO(offset))
+# define MY_PREAD64(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, 0, OFF64_HI_LO(offset))
+#endif
 
+#ifdef __NR_pwrite64
+# define __NR_pwrite __NR_pwrite64
+#endif
 
 #ifdef __NR_pwrite
-extern __typeof(pwrite) __libc_pwrite;
 # define __NR___syscall_pwrite __NR_pwrite
-static __inline__ _syscall6(ssize_t, __syscall_pwrite, int, fd,
-		const void *, buf, size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	return(__syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR(offset >> 31, offset)));
-}
-weak_alias(__libc_pwrite,pwrite)
-
-# ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pwrite64) __libc_pwrite64;
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-	return(__syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR(offset >> 32, offset)));
-}
-weak_alias(__libc_pwrite64,pwrite64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* __NR_pwrite */
-
-
-
-#if ! defined __NR_pread || ! defined __NR_pwrite
-
-static ssize_t __fake_pread_write(int fd, void *buf,
-		size_t count, off_t offset, int do_pwrite)
-{
-	int save_errno;
-	ssize_t result;
-	off_t old_offset;
-
-	/* Since we must not change the file pointer preserve the
-	 * value so that we can restore it later.  */
-	if ((old_offset=lseek(fd, 0, SEEK_CUR)) == (off_t) -1)
-		return -1;
-
-	/* Set to wanted position.  */
-	if (lseek (fd, offset, SEEK_SET) == (off_t) -1)
-		return -1;
-
-	if (do_pwrite == 1) {
-		/* Write the data.  */
-		result = write(fd, buf, count);
-	} else {
-		/* Read the data.  */
-		result = read(fd, buf, count);
-	}
-
-	/* Now we have to restore the position.  If this fails we
-	 * have to return this as an error.  */
-	save_errno = errno;
-	if (lseek(fd, old_offset, SEEK_SET) == (off_t) -1)
-	{
-		if (result == -1)
-			__set_errno(save_errno);
-		return -1;
-	}
-	__set_errno(save_errno);
-	return(result);
-}
-
-# ifdef __UCLIBC_HAS_LFS__
-
-static ssize_t __fake_pread_write64(int fd, void *buf,
-		size_t count, off64_t offset, int do_pwrite)
-{
-	int save_errno;
-	ssize_t result;
-	off64_t old_offset;
-
-	/* Since we must not change the file pointer preserve the
-	 * value so that we can restore it later.  */
-	if ((old_offset=lseek64(fd, 0, SEEK_CUR)) == (off64_t) -1)
-		return -1;
-
-	/* Set to wanted position.  */
-	if (lseek64(fd, offset, SEEK_SET) == (off64_t) -1)
-		return -1;
-
-	if (do_pwrite == 1) {
-		/* Write the data.  */
-		result = write(fd, buf, count);
-	} else {
-		/* Read the data.  */
-		result = read(fd, buf, count);
-	}
-
-	/* Now we have to restore the position. */
-	save_errno = errno;
-	if (lseek64 (fd, old_offset, SEEK_SET) == (off64_t) -1) {
-		if (result == -1)
-			__set_errno (save_errno);
-		return -1;
-	}
-	__set_errno (save_errno);
-	return result;
-}
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /*  ! defined __NR_pread || ! defined __NR_pwrite */
-
-#ifndef __NR_pread
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset);
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	return(__fake_pread_write(fd, buf, count, offset, 0));
-}
-weak_alias(__libc_pread,pread)
-
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset);
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-	return(__fake_pread_write64(fd, buf, count, offset, 0));
-}
-weak_alias(__libc_pread64,pread64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* ! __NR_pread */
-
-
-#ifndef __NR_pwrite
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset);
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	return(__fake_pread_write(fd, (void*)buf, count, offset, 1));
-}
-weak_alias(__libc_pwrite,pwrite)
+static _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+# define MY_PWRITE(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, 0, OFF_HI_LO(offset))
+# define MY_PWRITE64(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, 0, OFF64_HI_LO(offset))
+#endif
 
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset);
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-	return(__fake_pread_write64(fd, (void*)buf, count, offset, 1));
-}
-weak_alias(__libc_pwrite64,pwrite64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* ! __NR_pwrite */
+#include "../common/pread_write.c"
diff --git a/libc/sysdeps/linux/sh/pread_write.c b/libc/sysdeps/linux/sh/pread_write.c
index 86feb9c..dcc6967 100644
--- a/libc/sysdeps/linux/sh/pread_write.c
+++ b/libc/sysdeps/linux/sh/pread_write.c
@@ -4,122 +4,37 @@
  *
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
-/*
- * Based in part on the files
- *		./sysdeps/unix/sysv/linux/pwrite.c,
- *		./sysdeps/unix/sysv/linux/pread.c,
- *		sysdeps/posix/pread.c
- *		sysdeps/posix/pwrite.c
- * from GNU libc 2.2.5, but reworked considerably...
- */
 
 #include <sys/syscall.h>
 #include <unistd.h>
-#include <stdint.h>
 #include <endian.h>
 
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-#include <sysdep-cancel.h>
-#else
-#define SINGLE_THREAD_P 1
-#endif
-
-
-#ifdef __NR_pread64             /* Newer kernels renamed but it's the same.  */
-# ifdef __NR_pread
-#  error "__NR_pread and __NR_pread64 both defined???"
-# endif
+#ifdef __NR_pread64
 # define __NR_pread __NR_pread64
 #endif
 
 #ifdef __NR_pread
-extern __typeof(pread) __libc_pread;
 # define __NR___syscall_pread __NR_pread
-static __inline__ _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
-		size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	if (SINGLE_THREAD_P)
-		return(__syscall_pread(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset)));
-
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-	int oldtype = LIBC_CANCEL_ASYNC ();
-	ssize_t result = __syscall_pread(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset));
-	LIBC_CANCEL_RESET (oldtype);
-	return result;
-#endif
-}
-weak_alias(__libc_pread,pread)
-
-# ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pread64) __libc_pread64;
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-	uint32_t low = offset & 0xffffffff;
-	uint32_t high = offset >> 32;
-
-	if (SINGLE_THREAD_P)
-		return __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
-
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-	int oldtype = LIBC_CANCEL_ASYNC ();
-	ssize_t result = __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
-	LIBC_CANCEL_RESET (oldtype);
-	return result;
+static _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+# define MY_PREAD(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, 0, OFF_HI_LO(offset))
+# define MY_PREAD64(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, 0, OFF64_HI_LO(offset))
 #endif
-}
-weak_alias(__libc_pread64,pread64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* __NR_pread */
-
-/**********************************************************************/
 
-#ifdef __NR_pwrite64            /* Newer kernels renamed but it's the same.  */
-# ifdef __NR_pwrite
-#  error "__NR_pwrite and __NR_pwrite64 both defined???"
-# endif
+#ifdef __NR_pwrite64
 # define __NR_pwrite __NR_pwrite64
 #endif
 
 #ifdef __NR_pwrite
-extern __typeof(pwrite) __libc_pwrite;
 # define __NR___syscall_pwrite __NR_pwrite
-static __inline__ _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
-		size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	if (SINGLE_THREAD_P)
-		return __syscall_pwrite(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset));
-
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-	int oldtype = LIBC_CANCEL_ASYNC ();
-	ssize_t result = __syscall_pwrite(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset));
-	LIBC_CANCEL_RESET (oldtype);
-	return result;
+static _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+# define MY_PWRITE(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, 0, OFF_HI_LO(offset))
+# define MY_PWRITE64(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, 0, OFF64_HI_LO(offset))
 #endif
 
-}
-weak_alias(__libc_pwrite,pwrite)
-
-# ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pwrite64) __libc_pwrite64;
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-	uint32_t low = offset & 0xffffffff;
-	uint32_t high = offset >> 32;
-
-	if (SINGLE_THREAD_P)
-		return __syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
-
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-	int oldtype = LIBC_CANCEL_ASYNC ();
-	ssize_t result = __syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
-	LIBC_CANCEL_RESET (oldtype);
-	return result;
-#endif
-}
-weak_alias(__libc_pwrite64,pwrite64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* __NR_pwrite */
+#include "../common/pread_write.c"
diff --git a/libc/sysdeps/linux/xtensa/pread_write.c b/libc/sysdeps/linux/xtensa/pread_write.c
index 71ba22b..dcc6967 100644
--- a/libc/sysdeps/linux/xtensa/pread_write.c
+++ b/libc/sysdeps/linux/xtensa/pread_write.c
@@ -4,186 +4,37 @@
  *
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
-/*
- * Based in part on the files
- *		./sysdeps/unix/sysv/linux/pwrite.c,
- *		./sysdeps/unix/sysv/linux/pread.c,
- *		sysdeps/posix/pread.c
- *		sysdeps/posix/pwrite.c
- * from GNU libc 2.2.5, but reworked considerably...
- */
 
 #include <sys/syscall.h>
 #include <unistd.h>
-#include <stdint.h>
 #include <endian.h>
 
-extern __typeof(pread) __libc_pread;
-extern __typeof(pwrite) __libc_pwrite;
-#ifdef __UCLIBC_HAS_LFS__
-extern __typeof(pread64) __libc_pread64;
-extern __typeof(pwrite64) __libc_pwrite64;
+#ifdef __NR_pread64
+# define __NR_pread __NR_pread64
 #endif
 
-#include <bits/kernel_types.h>
-
 #ifdef __NR_pread
-
 # define __NR___syscall_pread __NR_pread
-/* On Xtensa, 64-bit values are aligned in even/odd register pairs.  */
-static __inline__ _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
-		size_t, count, int, pad, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	return __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR(offset >> 31, offset));
-}
-weak_alias(__libc_pread,pread)
-
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-	uint32_t low = offset & 0xffffffff;
-	uint32_t high = offset >> 32;
-	return __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR(high, low));
-}
-weak_alias(__libc_pread64,pread64)
-# endif /* __UCLIBC_HAS_LFS__  */
+static _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+# define MY_PREAD(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, 0, OFF_HI_LO(offset))
+# define MY_PREAD64(fd, buf, count, offset) \
+	__syscall_pread(fd, buf, count, 0, OFF64_HI_LO(offset))
+#endif
 
-#endif /* __NR_pread */
+#ifdef __NR_pwrite64
+# define __NR_pwrite __NR_pwrite64
+#endif
 
 #ifdef __NR_pwrite
-
 # define __NR___syscall_pwrite __NR_pwrite
-/* On Xtensa, 64-bit values are aligned in even/odd register pairs.  */
-static __inline__ _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
-		size_t, count, int, pad, off_t, offset_hi, off_t, offset_lo)
-
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	return __syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR(offset >> 31, offset));
-}
-weak_alias(__libc_pwrite,pwrite)
-
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-	uint32_t low = offset & 0xffffffff;
-	uint32_t high = offset >> 32;
-	return __syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR(high, low));
-}
-weak_alias(__libc_pwrite64,pwrite64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* __NR_pwrite */
-
-#if ! defined __NR_pread || ! defined __NR_pwrite
-
-static ssize_t __fake_pread_write(int fd, void *buf,
-		size_t count, off_t offset, int do_pwrite)
-{
-	int save_errno;
-	ssize_t result;
-	off_t old_offset;
-
-	/* Since we must not change the file pointer preserve the
-	 * value so that we can restore it later.  */
-	if ((old_offset=lseek(fd, 0, SEEK_CUR)) == (off_t) -1)
-		return -1;
-
-	/* Set to wanted position.  */
-	if (lseek(fd, offset, SEEK_SET) == (off_t) -1)
-		return -1;
-
-	if (do_pwrite == 1) {
-		/* Write the data.  */
-		result = write(fd, buf, count);
-	} else {
-		/* Read the data.  */
-		result = read(fd, buf, count);
-	}
-
-	/* Now we have to restore the position.  If this fails we
-	 * have to return this as an error.  */
-	save_errno = errno;
-	if (lseek(fd, old_offset, SEEK_SET) == (off_t) -1)
-	{
-		if (result == -1)
-			__set_errno(save_errno);
-		return -1;
-	}
-	__set_errno(save_errno);
-	return(result);
-}
-
-# ifdef __UCLIBC_HAS_LFS__
-
-static ssize_t __fake_pread_write64(int fd, void *buf,
-		size_t count, off64_t offset, int do_pwrite)
-{
-	int save_errno;
-	ssize_t result;
-	off64_t old_offset;
-
-	/* Since we must not change the file pointer preserve the
-	 * value so that we can restore it later.  */
-	if ((old_offset=lseek64(fd, 0, SEEK_CUR)) == (off64_t) -1)
-		return -1;
-
-	/* Set to wanted position.  */
-	if (lseek64(fd, offset, SEEK_SET) == (off64_t) -1)
-		return -1;
-
-	if (do_pwrite == 1) {
-		/* Write the data.  */
-		result = write(fd, buf, count);
-	} else {
-		/* Read the data.  */
-		result = read(fd, buf, count);
-	}
-
-	/* Now we have to restore the position. */
-	save_errno = errno;
-	if (lseek64(fd, old_offset, SEEK_SET) == (off64_t) -1) {
-		if (result == -1)
-			__set_errno (save_errno);
-		return -1;
-	}
-	__set_errno (save_errno);
-	return result;
-}
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /*  ! defined __NR_pread || ! defined __NR_pwrite */
-
-#ifndef __NR_pread
-ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
-	return __fake_pread_write(fd, buf, count, offset, 0);
-}
-weak_alias(__libc_pread,pread)
-
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
-	return __fake_pread_write64(fd, buf, count, offset, 0);
-}
-weak_alias(__libc_pread64,pread64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* ! __NR_pread */
-
-#ifndef __NR_pwrite
-ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
-	/* we won't actually be modifying the buffer,
-	 *just cast it to get rid of warnings */
-	return __fake_pread_write(fd, (void*)buf, count, offset, 1);
-}
-weak_alias(__libc_pwrite,pwrite)
+static _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
+		 size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
+# define MY_PWRITE(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, 0, OFF_HI_LO(offset))
+# define MY_PWRITE64(fd, buf, count, offset) \
+	__syscall_pwrite(fd, buf, count, 0, OFF64_HI_LO(offset))
+#endif
 
-# ifdef __UCLIBC_HAS_LFS__
-ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
-	return __fake_pread_write64(fd, (void*)buf, count, offset, 1);
-}
-weak_alias(__libc_pwrite64,pwrite64)
-# endif /* __UCLIBC_HAS_LFS__  */
-#endif /* ! __NR_pwrite */
+#include "../common/pread_write.c"
-- 
1.7.3.4



More information about the uClibc-cvs mailing list