MAP_FIXED could be trying to get a map from 0.
Pls remove this flag and try.
On Sat, Sep 21, 2013 at 6:55 PM, Ravi Teja <ravi2j@xxxxxxxxx> wrote:
Hello all,I tried mmap'ing to address zero after setting /proc/sys/vm/mmap_min_addr to 0, but mmap is giving Permission Denied error.My C code is as below -#include <stdio.h>#include <stdlib.h>#include <sys/mman.h>int main(void){int *ptr = NULL;ptr = mmap(0,4096,PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED,-1,0);if(ptr == MAP_FAILED){perror("Error in mapping\n");exit(1);}printf("After mmap\n");*ptr = 16;printf("Contents of address 0x%x is :: %d\n",ptr,*ptr);return 0;}Am I doing anything wrong here?Thank you in advance.Regards,Ravi Teja
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