Map bricks below first 2GB of address space

[mogery]

This fixes an issue with mono where JIT compiled code would near-call wrapped libraries, but fail because the difference between PC and the call address did not fit into an imm32.

This was fixed by replacing posix_memalign with my_mmap and providing the MAP_32BIT flag.

Fixes #131

[mogery]

@ptitSeb The build produces -Wimplicit-function-declaration warnings for the usage of my_mmap and my_munmap (see). How should I go about resolving this?

Should I create a header file in src/include that exposes these two methods? Or is there a better way to include methods from wrapped?

[ptitSeb]

@ptitSeb The build produces -Wimplicit-function-declaration warnings for the usage of my_mmap and my_munmap (see). How should I go about resolving this?

Should I create a header file in src/include that exposes these two methods? Or is there a better way to include methods from wrapped?

You can just add a declaration of the functions at the beginning of the C file. I haven't create a .h with those function. I'll probably add them to customemem.hat some point...

[ptitSeb]

Can you try to run Wine 64bits with this build. Just to be sure, because the first bricks will take a very low address, and I remember that wine tries to allocates them too (cannot tests that myself before next week)

[mogery]

I'm busy right now, but will do in the afternoon.

[mogery]

Wine works without errors. Ready to merge from my end.