[linuxsh-dev] Different old_mmap behavior in 2.4.5 and 2.4.8

[Bao C. H. <ba...@se...>]

We are moving from kernel 2.4.5 to kernel 2.4.8 and above.
One of our applications broke due to different behaviors
of the system call old_mmap.

In kernel 2.4.5:
307   old_mmap(0x7b7f7000, 36864, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7b7f7000

In kernel 2.4.8:
[pid   313] old_mmap(0x7b7f7000, 36864, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7b7f8000

In 2.4.5, we request 0x7b7f7000 and get the same area back.
In 2.4.8, we also request 0x7b7f7000, but we are getting a
different area pointed by 0x7b7f8000.

Is this supposed to be the correct area?  What changes make
the newer kernels to return different pointers?

Appreciate any pointers/suggestions.

Thanks.
Bao