MT & SINGELMAP_MEMORY model

[Vladimir T. <vtz...@gm...>]

Bruno,

I disabled SINGLEMAP_MEMORY model in MT builds. The problem is that this
model assumes single fixed stack address range while every thread requires
it's own stack which is currently malloc-ed. What is the good way to
workaround this? Allocate new threads stacks in the above range?

Besides this I observe weird behaviour with amd64 builds on linux - both
single and multithreaded: without libffcall there is consistent segfault on
sockets tests while with libffcall enabled everything works fine. Will
investigate this further but any clue will be helpful.

--
  vlad