/* vi: set sw=4 ts=4: * * Copyright (C) 2000-2006 Erik Andersen <andersen@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... */ #define _GNU_SOURCE #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> #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 #ifdef __NR_pread #ifdef __mips64 _syscall4(ssize_t, pread, int, fd, void *, buf, size_t, count, off_t, offset); #else /* !__mips64 */ #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))); } strong_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, 0, __LONG_LONG_PAIR (high, low))); } strong_alias(__libc_pread64,pread64) #endif /* __UCLIBC_HAS_LFS__ */ #endif /* !__mips64 */ #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 # define __NR_pwrite __NR_pwrite64 #endif #ifdef __NR_pwrite #ifdef __mips64 _syscall4(ssize_t, pwrite, int, fd, const void *, buf, size_t, count, off_t, offset); #else /* !__mips64 */ #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))); } strong_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, 0, __LONG_LONG_PAIR (high, low))); } strong_alias(__libc_pwrite64,pwrite64) #endif /* __UCLIBC_HAS_LFS__ */ #endif /* !__mips64 */ #endif /* __NR_pwrite */