On 12/30/15 09:14, Laurent Vivier wrote:
>
> Le 30/12/2015 02:10, cheng...@emindsoft.com.cn a écrit :
>> From: Chen Gang <cheng...@emindsoft.com.cn>
>>
>> When mapping MAP_ANONYMOUS memory fragments, still need notice about to
>> set it zero, or it will cause issues.
>>
>> Signed-off-by: Chen Gang <gang.chen.5...@gmail.com>
>> ---
>> linux-user/mmap.c | 4 +++-
>> 1 files changed, 3 insertions(+), 1 deletions(-)
>>
>> diff --git a/linux-user/mmap.c b/linux-user/mmap.c
>> index 7b459d5..c6c478e 100644
>> --- a/linux-user/mmap.c
>> +++ b/linux-user/mmap.c
>> @@ -186,10 +186,12 @@ static int mmap_frag(abi_ulong real_start,
>> if (prot_new != (prot1 | PROT_WRITE))
>> mprotect(host_start, qemu_host_page_size, prot_new);
>> } else {
>> - /* just update the protection */
>> if (prot_new != prot1) {
>> mprotect(host_start, qemu_host_page_size, prot_new);
>> }
>> + if (prot_new & PROT_WRITE) {
>> + memset(g2h(start), 0, end - start);
>> + }
>> }
>> return 0;
>> }
>>
>
> Reviewed-by: Laurent Vivier <laur...@vivier.eu>
>
Thank you for your work.
Happy New Year! :-)
--
Chen Gang (陈刚)
Open, share, and attitude like air, water, and life which God blessed
