From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: akpm@linux-foundation.org, broonie@kernel.org, mhocko@suse.cz,
sfr@canb.auug.org.au, linux-next@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, mm-commits@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: mmotm 2018-05-10-16-34 uploaded (objtool)
Date: Fri, 11 May 2018 10:45:19 -0500 [thread overview]
Message-ID: <20180511154519.w6bbhptv67fvsgnr@treble> (raw)
In-Reply-To: <b4c08470-b035-c735-9a1a-3dbf1f2804e2@infradead.org>
On Thu, May 10, 2018 at 06:06:38PM -0700, Randy Dunlap wrote:
> >> Hi Josh, Peter:
> >>
> >> Is this something that you already have fixes for?
> >>
> >>
> >> on x86_64:
> >>
> >> drivers/video/fbdev/omap2/omapfb/dss/dispc.o: warning: objtool: dispc_runtime_suspend()+0xbb8: sibling call from callable instruction with modified stack frame
> >> drivers/video/fbdev/omap2/omapfb/dss/dispc.o: warning: objtool: dispc_runtime_resume()+0xcc5: sibling call from callable instruction with modified stack frame
> >
> > I don't recall seeing that one. Can you share the .config and/or .o
> > file?
> >
>
> Sure. Both are attached.
Here's a fix (applies on top of the GCC 8 patches I posted this week):
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 9bb04fddd3c8..a358489a1560 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -961,11 +961,15 @@ static struct rela *find_switch_table(struct objtool_file *file,
if (find_symbol_containing(file->rodata, text_rela->addend))
continue;
+ /* mov [rodata addr], %reg */
rodata_rela = find_rela_by_dest(file->rodata, text_rela->addend);
- if (!rodata_rela)
- continue;
+ if (rodata_rela)
+ return rodata_rela;
- return rodata_rela;
+ /* mov [rodata_addr](%rip), %reg */
+ rodata_rela = find_rela_by_dest(file->rodata, text_rela->addend + 4);
+ if (rodata_rela)
+ return rodata_rela;
}
return NULL;
prev parent reply other threads:[~2018-05-11 15:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-10 23:35 mmotm 2018-05-10-16-34 uploaded akpm
2018-05-11 0:47 ` mmotm 2018-05-10-16-34 uploaded (objtool) Randy Dunlap
2018-05-11 1:01 ` Josh Poimboeuf
2018-05-11 1:06 ` Randy Dunlap
2018-05-11 15:45 ` Josh Poimboeuf [this message]
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