/* * 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 <_lfs_64.h> #ifdef __UCLIBC_HAS_LFS__ #include <errno.h> #include <unistd.h> #include <sys/mman.h> #include <sys/syscall.h> #include <bits/uClibc_page.h> # if !defined __NR_mmap2 /* * 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) /* Some architectures always use 12 as page shift for mmap2() eventhough the * real PAGE_SHIFT != 12. Other architectures use the same value as * PAGE_SHIFT... */ # 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; } # ifdef __USE_FILE_OFFSET64 return __syscall_mmap2(addr, len, prot, flags, fd, ((__u_quad_t) offset >> MMAP2_PAGE_SHIFT)); # else return __syscall_mmap2(addr, len, prot, flags, fd, ((__u_long) offset >> MMAP2_PAGE_SHIFT)); # endif } # endif #endif /* __UCLIBC_HAS_LFS__ */