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- /*
- * posix_fadvise() 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 <sys/syscall.h>
- #ifdef __NR_arm_fadvise64_64
- /* We handle the 64bit alignment issue which is why the arm guys renamed their
- * syscall in the first place. So rename it back.
- */
- # define __NR_fadvise64_64 __NR_arm_fadvise64_64
- #endif
- #if defined(__NR_fadvise64) || defined(__NR_fadvise64_64)
- # include <fcntl.h>
- # include <endian.h>
- # include <bits/wordsize.h>
- # if defined(__NR_fadvise64_64)
- #include <_lfs_64.h>
- int posix_fadvise64(int fd, off64_t offset, off64_t len, int advice);
- int posix_fadvise(int fd, off_t offset, off_t len, int advice)
- {
- return posix_fadvise64(fd, offset, len, advice);
- }
- #else
- int posix_fadvise(int fd, off_t offset, off_t len, int advice)
- {
- int ret;
- INTERNAL_SYSCALL_DECL(err);
- # ifdef __NR_fadvise64_64
- # if __WORDSIZE == 64
- ret = INTERNAL_SYSCALL(fadvise64_64, err, 4, fd, offset, len, advice);
- # else
- # 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,
- OFF_HI_LO (offset), OFF_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,
- OFF_HI_LO (offset), OFF_HI_LO (len), advice);
- # else
- ret = INTERNAL_SYSCALL(fadvise64_64, err, 6, fd,
- OFF_HI_LO (offset), OFF_HI_LO (len), advice);
- # endif
- # endif
- # else /* __NR_fadvise64 */
- # if __WORDSIZE == 64
- ret = INTERNAL_SYSCALL(fadvise64, err, 4, fd, offset, len, advice);
- # else
- # if defined(__UCLIBC_SYSCALL_ALIGN_64BIT__)
- ret = INTERNAL_SYSCALL(fadvise64, err, 6, fd, /*unused*/0,
- # else
- ret = INTERNAL_SYSCALL(fadvise64, err, 5, fd,
- # endif
- OFF_HI_LO (offset), len, advice);
- # endif
- # endif
- if (INTERNAL_SYSCALL_ERROR_P (ret, err))
- return INTERNAL_SYSCALL_ERRNO (ret, err);
- return 0;
- }
- # if !defined __NR_fadvise64_64 || __WORDSIZE == 64
- strong_alias(posix_fadvise,posix_fadvise64)
- # endif
- #endif
- #endif
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