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- /*
- * posix_fadvise64() for uClibc
- * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
- *
- * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- #include <_lfs_64.h>
- #include <sys/syscall.h>
- #include <bits/wordsize.h>
- #ifdef __NR_arm_fadvise64_64
- # define __NR_fadvise64_64 __NR_arm_fadvise64_64
- #endif
- #if defined __NR_fadvise64_64 && __WORDSIZE == 32
- # include <fcntl.h>
- # include <endian.h>
- int posix_fadvise64(int fd, off64_t offset, off64_t len, int advice)
- {
- int ret;
- INTERNAL_SYSCALL_DECL (err);
- /* ARM has always been funky. */
- #if defined (__arm__) || defined (__nds32__) || defined (__csky__) || \
- (defined(__UCLIBC_SYSCALL_ALIGN_64BIT__) && (defined(__powerpc__) || defined(__xtensa__)))
- /* arch with 64-bit data in even reg alignment #1: [powerpc/xtensa]
- * custom syscall handler (rearranges @advice to avoid register hole punch) */
- ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advice,
- OFF64_HI_LO (offset), OFF64_HI_LO (len));
- #elif defined(__UCLIBC_SYSCALL_ALIGN_64BIT__)
- /* arch with 64-bit data in even reg alignment #2: [arcv2/others-in-future]
- * stock syscall handler in kernel (reg hole punched) */
- ret = INTERNAL_SYSCALL (fadvise64_64, err, 7, fd, 0,
- OFF64_HI_LO (offset), OFF64_HI_LO (len),
- advice);
- # else
- ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
- OFF64_HI_LO (offset), OFF64_HI_LO (len),
- advice);
- # endif
- if (INTERNAL_SYSCALL_ERROR_P (ret, err))
- return INTERNAL_SYSCALL_ERRNO (ret, err);
- return 0;
- }
- #endif
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