#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
#include <limits.h>
#include "syscall.h"
#include "libc.h"

WEAK_PROVIDE_INT;
WEAK_PROVIDE_VOID;
weak_alias(__weak_dummy_int, __vm_lock);
weak_alias(__weak_dummy_void, __vm_unlock);

#define OFF_MASK ((-0x2000ULL << (8*sizeof(long)-1)) | 0xfff)

void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
{
	void *ret;

	if (off & OFF_MASK) {
		errno = EINVAL;
		return MAP_FAILED;
	}
	if (flags & MAP_FIXED) __vm_lock(-1);
#ifdef SYS_mmap2
	ret = (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12);
#else
	ret = (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off);
#endif
	if (flags & MAP_FIXED) __vm_unlock();
	return ret;
}

weak_alias(__mmap, mmap);

LFS64(mmap);