[Beowulf] broken binutils (was: Redmond is at it, again)
hahn at physics.mcmaster.ca
Fri Jun 18 18:44:10 EDT 2004
> I do wonder however, why ld.so always gets loaded at the 1GB boundary
> therefore limiting stack space to less than 1GB.
it doesn't. or rather, ld.so shows up there because TASK_UNMAPPED_BASE,
in most kernels on 32b x86, is 1GB. that's the place where mmap starts
putting mapped regions, of which ld.so is simply the first.
you can change TASK_UNMAPPED_BASE. you can even make it a sysctl.
you can link statically, in which case mmap is never used (watch out
for stdio using mmap for a buffer!). there's even a patch to make
the mmap arena grow down (for people who care about max heap,
not max stack.)
this is a pretty old topic; there are sure to be numerous google hits.
regards, mark hahn.
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