Getting segmentation fault SIGSEGV in memcpy after mmap

Question

I wrote a simple Android native function that get a filename and some more arguments and read the file by mmapping (mmap) it\'s memory.

Because it\'s mmap, I don\'t real

Answer 1

This loop never terminates because ret_val always equals buffer

void *ret_val = buffer;
int read_length = length;
while(ret_val == buffer || read_length

memcpy always returns it's first argument, so ret_val never changes.