blob: 9b1dcd97f8f09a0fc9482c4875a65671e25d56e7 [file] [log] [blame]
* mmap.c
#include <stdint.h>
#include <errno.h>
#include <sys/syscall.h>
#include <sys/mman.h>
#include <unistd.h>
#include <bitsize.h>
#include <klibc/sysconfig.h>
* Set in SYSCALLS whether or not we should use an unadorned mmap() system
* call (typical on 64-bit architectures).
/* This architecture uses mmap2(). The Linux mmap2() system call takes
a page offset as the offset argument. We need to make sure we have
the proper conversion in place. */
extern void *__mmap2(void *, size_t, int, int, int, size_t);
void *mmap(void *start, size_t length, int prot, int flags, int fd,
off_t offset)
const int mmap2_shift = _KLIBC_MMAP2_SHIFT;
const off_t mmap2_mask = ((off_t) 1 << mmap2_shift) - 1;
if (offset & mmap2_mask) {
errno = EINVAL;
return MAP_FAILED;
return __mmap2(start, length, prot, flags, fd,
(size_t) offset >> mmap2_shift);