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2018 Jan 31
0
RFC: No Control Flow Check Attribute
...truments control flow protection schemes to handle such attacks. X86 Supports Indirect Branch Tracking (IBT) as part of Control-Flow Enforcement Technology (CET). IBT instruments ENDBR instructions (when -fcf-protection=branch is asserted) used to specify valid targets of indirect call / jmp. The `nocf_check` attribute indicates that no control-flow check will be performed on the attributed entity. It disables -fcf-protection=<> for a specific entity to fine grain the HW control flow protection mechanism. The flag is target independent and currently appertains to a function or function pointer....