/* * 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