Low limit for memory mapping

[Gilles Chanteperdrix]

Frédéric Point wrote:
> Hi all,
> 
> I tried to mmap with the MAP_FIXED flags set to some addresses
> starting at 0x1000 and mmap always return EPERM.
> 
> However when I can read from this document
> (http://www.arm.linux.org.uk/developer/memory.txt):
> 
> 00001000        TASK_SIZE-1     User space mappings
>                                Per-thread mappings are placed here via
>                                the mmap() system call.
> 
> But I can only map memory above 0x9000 just after where the _text is
> mapped. Could someone point me out why I can't use the addresses
> between 0X1000 and 0x8000 ?

Maybe you need to tweak /proc/sys/vm/mmap_min_addr ?

-- 
                                                                Gilles.