On Tue, Sep 13, 2022 at 03:51:44PM -0700, Indu Bhagat wrote: > Curious to know what all features of objtool rely on the need to reverse > engineer the control flow graph. Is it a larger set or it is only for ORC > generation ?
Objtool features which rely on the CFG: - Frame pointer rule validation (when using CONFIG_UNWINDER_FRAME_POINTER) - ORC metadata generation - Intel SMAP rule validation - ensures EFLAGS #AC is only set during usercopy - "noinstr" rule validation - ensures no instrumentation/tracing functions are called in certain critical sections -- Josh
