On Wed, Apr 20, 2022 at 10:03:18AM -0700, Nick Desaulniers wrote: > > > If the issues are all about objtool, > > > "depends on !STACK_VALIDATION" might be > > > an alternative approach? > > > > > > config DEBUG_SECTION_MISMATCH > > > bool "Enable full Section mismatch analysis" > > > depends on CC_IS_GCC > > > depends on !STACK_VALIDATION # do not confuse objtool > > > > Yes, that would be another way to handle it. Though that means the > > option would effectively be dead on x86-64. > > Does this series help (or is it related to this thread)? > https://lore.kernel.org/lkml/cover.1650300597.git.jpoimboe@xxxxxxxxxx/ > Patch 17/25 seems to make STACK_VALIDATION unwinder-dependent (on > CONFIG_UNWINDER_FRAME_POINTER)? Not really, that series just splits objtool into more granular features, so objtool is no longer just equivalent to CONFIG_STACK_VALIDATION. So the above suggestion would probably need to be changed to something like depends on !HAVE_UACCESS_VALIDATION Or maybe depends on !(HAVE_UACCESS_VALIDATION || NOINSTR_VALIDATION) But uaccess validation is still mandatory for x86-64, so that would still unconditionally disable CONFIG_DEBUG_SECTION_MISMATCH for x86-64. -- Josh
