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