krytarowski added a comment.
It looks like UserArea will need to map this structure:
typedef struct {
__gregset_t __gregs;
__greg_t _mc_tlsbase;
__fpregset_t __fpregs;
} mcontext_t;
- src/sys/arch/amd64/include/mcontext.h
https://github.com/IIJ-NetBSD/netbsd-src/blob/master/sys/arch/amd64/include/mcontext.h#L61
I'm thinking if I need to customize FPR as well:
/*
* Floating point register state
* The format of __fpregset_t is that of the fxsave instruction
* which requires 16 byte alignment. However the mcontext version
* is never directly accessed.
*/
typedef char __fpregset_t[512] __aligned(8);
https://github.com/IIJ-NetBSD/netbsd-src/blob/master/sys/arch/amd64/include/mcontext.h#L53
Joerg Sonnenberg (I forgot @login) wrote:
> I think you want to keep at least the mc_tlsbase field as well.
> Access to __thread variables will need it.
This will be handled by new UserArea.
I will research if I can skip the definition of `struct DBG`, as currently
there is no support for debug registers on NetBSD.
Repository:
rL LLVM
http://reviews.llvm.org/D16508
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