7 #include <sys/syscall.h>
9 #include <asm/page.h> /* For PAGE_SHIFT */
11 #if defined(__sparc__)
12 # define MMAP2_SHIFT 12 /* Fixed by syscall definition */
14 # define MMAP2_SHIFT PAGE_SHIFT
16 #define MMAP2_MASK ((1UL << MMAP2_SHIFT)-1)
19 * Prefer mmap2() over mmap(), except on the architectures listed
22 #if defined(__NR_mmap2) && !defined(__sparc__) && !defined(__ia64__)
24 /* This architecture uses mmap2() */
26 static inline _syscall6(void *,mmap2,void *,start,size_t,length,int,prot,int,flags,int,fd,off_t,offset);
28 /* The Linux mmap2() system call takes a page offset as the offset argument.
29 We need to make sure we have the proper conversion in place. */
31 void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
33 if ( offset & MMAP2_MASK ) {
38 return mmap2(start, length, prot, flags, fd, (size_t)offset >> MMAP2_SHIFT);
43 /* This architecture uses a plain mmap() system call */
44 /* Only use this for architectures where mmap() is a real 6-argument system call! */
46 _syscall6(void *,mmap,void *,start,size_t,length,int,prot,int,flags,int,fd,off_t,offset)