[NetBSD]sbrk(0)

gistfile1.txt

$ cat sbrk.c                                                                       
#include <stdio.h>
#include <unistd.h>
int main() {
    printf("%p\n", sbrk(0));
    printf("%p\n", sbrk(0));
    return 0;
}

----

$ uname -a
NetBSD  6.1 NetBSD 6.1 (GENERIC) amd64
$ gcc -m64 sbrk.c
$ ./a.out
0x600dc8
0x600dc8
$ gcc -m32 sbrk.c
$ ./a.out
0x80499a4
0x8100000

----

% uname -srm
FreeBSD 9.1-RELEASE i386
% gcc sbrk.c
% ./a.out
0x8049674
0x8400000

----

$ uname -srm
OpenBSD 5.3 i386
$ gcc sbrk.c
$ ./a.out
0x3c003260
0x3c003260

gistfile2.txt

$ cat sbrk2.c
#include <stdio.h>
#include <unistd.h>
int main() {
    void *a, *b;
    a = sbrk(0);
    b = sbrk(0);
    printf("%p\n", a);
    printf("%p\n", b);
    return 0;
}

----

$ uname -a
NetBSD  6.1 NetBSD 6.1 (GENERIC) amd64
$ gcc -m32 sbrk2.c
$ ./a.out
0x80499a4
0x80499a4

----

% uname -srm
FreeBSD 9.1-RELEASE i386
% gcc sbrk2.c
% ./a.out
0x8049678
0x8049678