Messages in this thread Patch in this message | | | Date | Mon, 28 Jan 2019 10:19:14 -0600 | From | Josh Poimboeuf <> | Subject | Re: next-20190125 - objtool complains about dumpstack |
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On Sun, Jan 27, 2019 at 11:40:10PM -0500, valdis.kletnieks@vt.edu wrote: > On Sun, 27 Jan 2019 22:18:25 -0600, Josh Poimboeuf said: > > On Sun, Jan 27, 2019 at 10:45:03PM -0500, valdis.kletnieks@vt.edu wrote: > > > Seen in a build: > > > > > > CC arch/x86/kernel/dumpstack.o > > > arch/x86/kernel/dumpstack.o: warning: objtool: oops_begin()+0x9: undefined stack state > > > arch/x86/kernel/dumpstack.o: warning: objtool: oops_begin()+0x0: stack state mismatch: cfa1=6+16 cfa2=7+8 > > > > > > Probably a gcc9 code generation that objtool doesn't know about? > > > > Can you share the .o file? > > Sure. Attached.
Thanks for reporting it. Here's the fix below. I'll submit an official patch soon.
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 0414a0d52262..df9bd60153c9 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -165,6 +165,7 @@ static int __dead_end_function(struct objtool_file *file, struct symbol *func, "fortify_panic", "usercopy_abort", "machine_real_restart", + "rewind_stack_do_exit", }; if (func->bind == STB_WEAK)
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