Author: Chen Minqiang <ptpt52@gmail.com>

Date:   Mon Oct 16 08:57:41 2017 +0800

    musl: fix mmap pass wrong offset to kernel

    

        for example off_t x=0x8d9eb000, the x/4096 result is 0xfff8d9eb, not 0x8d9eb as expecting

        this happens on arm_cortex-a15 with gcc 6.3.x

    

    Signed-off-by: Chen Minqiang <ptpt52@gmail.com>

diff --git a/src/mman/mmap.c b/src/mman/mmap.c

index 1592403..a09c901 100644

--- a/src/mman/mmap.c

+++ b/src/mman/mmap.c

@@ -27,7 +27,7 @@ void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)

                __vm_wait();

        }

 #ifdef SYS_mmap2

-       ret = __syscall(SYS_mmap2, start, len, prot, flags, fd, off/UNIT);

+       ret = __syscall(SYS_mmap2, start, len, prot, flags, fd, (unsigned long)off/UNIT);

 #else

        ret = __syscall(SYS_mmap, start, len, prot, flags, fd, off);

 #endif