On Wed, Aug 28, 2019 at 05:29:39PM +0200, Arnd Bergmann wrote: > On Wed, Aug 28, 2019 at 4:51 PM Josh Poimboeuf <jpoim...@redhat.com> wrote: > > On Wed, Aug 28, 2019 at 11:00:04AM +0200, Arnd Bergmann wrote: > > > On Tue, Aug 27, 2019 at 11:22 PM 'Nick Desaulniers' via Clang Built > > > Linux <clang-built-li...@googlegroups.com> wrote: > > > > On Tue, Aug 27, 2019 at 12:47 PM Arnd Bergmann <a...@arndb.de> wrote: > > > > > > Only a few unique objtool warnings remain now, here are the ones I > > > currently see, > > > along with .config files. Let me know which ones I should investigate > > > further, > > > I assume a lot of these are known issues: > > > > None of those look necessarily familiar. What are the remaining "known" > > clang issues which were found by objtool? > > Maybe Nick can identify some. > > > If you share .o files I can look at them. > > Attaching the ones I could easily recreate here.
adm1275.o: warning: objtool: adm1275_probe()+0x756: unreachable instruction - known issue: clang switch table has invalid entries - also an objtool bug: need to report it as "falls through to next function" atom.o: warning: objtool: atom_op_move() falls through to next function atom_op_and() evergreen_cs.o: warning: objtool: evergreen_cs_parse() falls through to next function evergreen_dma_cs_parse() - known issue: clang switch table has invalid entries common.o: warning: objtool: kasan_report()+0x52: call to __stack_chk_fail() with UACCESS enabled trace_branch.o: warning: objtool: ftrace_likely_update()+0x6c: call to __stack_chk_fail() with UACCESS enabled - objtool bug: need to add __stack_chk_fail to uaccess whitelist cxd2880_tnrdmd_dvbt2.o: warning: objtool: x_tune_dvbt2_demod_setting()+0x7f6: can't find switch jump table - objtool bug: tricky switch table issue exit.o: warning: objtool: abort()+0x3: unreachable instruction hugetlb.o: warning: objtool: hugetlb_vm_op_fault()+0x3: unreachable instruction idle.o: warning: objtool: switched_to_idle()+0x3: unreachable instruction madvise.o: warning: objtool: hugepage_madvise()+0x3: unreachable instruction privcmd.o: warning: objtool: privcmd_ioctl_mmap_batch()+0x5dd: unreachable instruction process.o: warning: objtool: play_dead()+0x3: unreachable instruction rmap.o: warning: objtool: anon_vma_clone()+0x1c2: unreachable instruction s5c73m3-core.o: warning: objtool: s5c73m3_probe()+0x262: unreachable instruction videobuf2-core.o: warning: objtool: vb2_core_dqbuf()+0xae6: unreachable instruction xfrm_output.o: warning: objtool: xfrm_outer_mode_output()+0x109: unreachable instruction - clang issue: trying to finish frame pointer setup after BUG() in unreachable code path pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_set()+0x10d: sibling call from callable instruction with modified stack frame - bad clang bug: sibling call without first popping registers -- Josh