search for: msepar

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2017 Feb 18
2
[RFC] Using Intel MPX to harden SafeStack
...COPTIMIZE: - Unpatched Base: -std=gnu89 -O2 -fno-strict-aliasing -march=skylake -mtune=skylake - Unpatched/Patched SafeStack: -std=gnu89 -O2 -fno-strict-aliasing -march=skylake -mtune=skylake -fsanitize=safe-stack - MPX: -std=gnu89 -O2 -fno-strict-aliasing -march=skylake -mtune=skylake -mseparate-stack-seg -fsanitize=safe-stack CXXOPTIMIZE: - Unpatched Base: -O2 -fno-strict-aliasing -march=skylake -mtune=skylake - Unpatched/Patched SafeStack: -O2 -fno-strict-aliasing -march=skylake -mtune=skylake -fsanitize=safe-stack - MPX: -O2 -fno-strict-aliasing -march=skylake -mtune=skylake...
2017 Feb 08
4
[RFC] Using Intel MPX to harden SafeStack
...t is used for checking other accesses. However, negative offsets are sometimes used for thread-local accesses, which are treated as very large unsigned effective addresses. Checking them would require them to first be added to the base of the thread-local storage segment. Developers can use the -mseparate-stack-seg flag to enable instrumentation of functions that have the SafeStack attribute [4, 6]. That flag also causes the runtime library to be linked [5]. Due to BND0 being treated as per-thread state, the runtime library picks an initial BND0 upper bound when the program starts that is arbit...