Hi, I am trying to figure out how to properly allocate memory for sigaltstack in all cases. This is for MLton, which I maintain in Fedora. Here is the problem: originally, MLton was not using PROT_EXEC for areas of memory used with sigaltstack. This was causing parisc to fail, since it uses trampolines on the stack. http://mlton.org/pipermail/mlton/2004-December/026512.html Now Fedora 9 tightens the default selinux booleans and by default mprotect with PROT_EXEC will fail. I want to fix MLton upstream to work correctly. Should I special case systems that require PROT_EXEC? Or is there a more correct way to allocate memory for it? Might this mean that sigaltstack() programs under SELinux on certain architectures must run in unconfined_u:object_r:unconfined_execmem_exec_t ? Thanks, Adam
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