diff options
Diffstat (limited to 'libc/sysdeps/linux/c6x/pread_write.c')
| -rw-r--r-- | libc/sysdeps/linux/c6x/pread_write.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/c6x/pread_write.c b/libc/sysdeps/linux/c6x/pread_write.c new file mode 100644 index 000000000..f985b4374 --- /dev/null +++ b/libc/sysdeps/linux/c6x/pread_write.c @@ -0,0 +1,103 @@ +/* vi: set sw=4 ts=4: + * + * Copyright (C) 2002 by Erik Andersen <andersen@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__ */ + |