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Hi All, Jump Oriented Programming attacks rely on tampering addresses used by indirect call / jmp, e.g. redirect control-flow to non-programmer intended bytes in binary. A new target independent command line option -fcf-protection=<branch/return/full/none> instruments control flow protection schemes to handle such attacks. X86 Supports Indirect Branch Tracking (IBT) as part of Control-Flow

...equivalent) but would be better just to do subui r2, r4, 5. Mainly the problem is if the constant is specified as negative, and when 0-constant can fit in 16-bits unsigned, wish it to use the SUBui instruction. Sorry if this is hard to understand but any piece of help in fixing this is very much appertained. If it helps I am using the source for llvm 2.5 as a base. Regards, Sean Donno

...lass __attribute__((may_alias)) list { ... }; I understand that each particular attribute may be handled differently. Assuming that I want to retain one attribute in the LLVM IR, how is the attribute represented in the LLVM IR? And then how can I query the attribute assuming that the attribute is appertained to a class? By the way, I am very grateful for any idea on extending the compiler with new attribute tokens? Best, Xiaolong