Packages/uClibc/patches/10 mmap.diff

"The problem is that offset is first shortened from 64 bits to 32 bits and then it is re-expended to 64 bits to do the comparison. As off_t is a signed type, ((off_t) offset) is negative and the expansion to 64 bits keep the sign giving a negative 64 bits number which is obviously not equal to offset." - Aurel

more information at: http://www.uclibc.org/lists/uclibc/2003-May/006192.html

diff -Naur uClibc.orig/libc/sysdeps/linux/common/mmap64.c uClibc/libc/sysdeps/linux/common/mmap64.c --- uClibc.orig/libc/sysdeps/linux/common/mmap64.c 2006-03-18 09:38:13.000000000 +0200 +++ uClibc/libc/sysdeps/linux/common/mmap64.c 2006-03-18 09:38:17.000000000 +0200 @@ -29,12 +29,6 @@

__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);
}