Re: C23 thoughts and opinions

On Sun, 2 Jun 2024 01:11:35 +0300
Michael S <already5chosen@yahoo.com> wrote:

On Fri, 31 May 2024 22:15:54 +0100
bart <bc@freeuk.com> wrote:
 

If I run this:
 
     printf("%p\n", &_binary_hello_c_start);
     printf("%p\n", &_binary_hello_c_end);
     printf("%p\n", &_binary_hello_c_size);
 
I get:
 
     00007ff6ef252010
     00007ff6ef252056
     00007ff5af240046
 
I can see that the first two can be subtracted to give the sizes of
the data, which is 70 or 0x46. 0x46 is the last byte of the address
of _size, so what's happening there? What's with the crap in bits
16-47?
 

 
It looks like ASLR. I don't see it because I test on Win7.
 
 

I tried it on versions of Windows that have ASLR. Had seen no problems.
I see *_start and *_end at high addresses and sometimes changing
between invocations, which means that ASLR is certainly in effect, but
*_size always prints correct result.