Re: mmap 0-th page

On 26. 07. 24, 12:36, michal.hrachovec@volny.cz wrote:

I am trying to allocate the 0-th page with mmap function in my code. I am always getting this error with this error-code: mmap error ffffffff Then I was searching the internet for this topic and I have found the same topic at stackoverflow web pages.

char *zero = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0); *(char *)(NULL) = 'A'; printf("%c\n", *zero);

still yields 'A' here with 6.10.2 w/ vm.mmap_min_addr=0.