Messages in this thread |  | | | From | Roland McGrath <> | | Subject | Re: [RFC] x86: xsave/xrstor support, ucontext_t extensions | | Date | Tue, 20 May 2008 13:10:44 -0700 (PDT) |
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> I don't think there is one. We never copy fxsave completely out of the > kernel. x86-64 does FXSAVE directly in/out user space, but the > only leak is what there was before.
ptrace/user_regset copies out and in the whole fxsave block from the ptrace caller. (Only the mxcsr word is constrained after copy-in.)
Thanks, Roland
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