/* * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ /* Massivly hacked up for uClibc by Erik Andersen */ #include <features.h> #include <errno.h> #include <unistd.h> #include <sys/mman.h> #ifdef __UCLIBC_HAS_LFS__ libc_hidden_proto(mmap) #if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS != 64 # undef _FILE_OFFSET_BITS # define _FILE_OFFSET_BITS 64 #endif #ifndef __USE_LARGEFILE64 # define __USE_LARGEFILE64 1 #endif /* 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 # if ! defined __NR_mmap2 || ! defined _syscall6 /* * This version is a stub that just chops off everything at the mmap 32 bit * mmap() address space... You will probably need to add in an arch specific * implementation to override this as there is not a generic way for me to * implement this particular syscall if your arch lacks _syscall6... * */ __ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset) { if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len)) { __set_errno (EINVAL); return MAP_FAILED; } return mmap (addr, len, prot, flags, fd, (off_t) offset); } # else # define __NR___syscall_mmap2 __NR_mmap2 static inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, size_t, len, int, prot, int, flags, int, fd, off_t, offset); /* This is always 12, even on architectures where PAGE_SHIFT != 12. */ # ifndef MMAP2_PAGE_SHIFT # define MMAP2_PAGE_SHIFT 12 # endif __ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset) { if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) { __set_errno (EINVAL); return MAP_FAILED; } return(__syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT))); } # endif #endif /* __UCLIBC_HAS_LFS__ */