Dear all,

In fasm I can allocate memory with e.g.
a0 rd 1024h

But how can I do this dynamically using system calls. Basically I need a
malloc(3), and free(3). I couldn't find the clue in the system call list, there is
no *alloc* there.

Best Regards,
Ton

You have an excellent example: Take a look into the source of fasm. You will find it.

It's syscall 45, called sys_brk, which resizes the memory block allocated for your program (the program resides on the bottom of this block, and with sys_brk you just move the top of it).

sys_brk is old style. Now it's preffered sys_mmap with anon mapping.

However brk syscall is common for the Linux and all BSD systems (I'm not sure about BeOS), so I preferred it.

Thanks for the pointers. Iĺl give it a try.

--
Ton

there's also malloc and free in linux
try: man 3 malloc

But then he need link with libc...