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objtool: GCC 8 support

From:  Josh Poimboeuf <jpoimboe-AT-redhat.com>
To:  x86-AT-kernel.org
Subject:  [PATCH 0/3] objtool: GCC 8 support
Date:  Wed, 9 May 2018 22:39:13 -0500
Message-ID:  <cover.1525923412.git.jpoimboe@redhat.com>
Cc:  linux-kernel-AT-vger.kernel.org, Randy Dunlap <rdunlap-AT-infradead.org>, Arnd Bergmann <arnd-AT-arndb.de>, Peter Zijlstra <peterz-AT-infradead.org>, Ingo Molnar <mingo-AT-kernel.org>, Thomas Gleixner <tglx-AT-linutronix.de>, Greg KH <gregkh-AT-linuxfoundation.org>, David Laight <David.Laight-AT-ACULAB.COM>, damian <damian.tometzki-AT-icloud.com>
Archive-link:  Article

Now that GCC 8 is out, several people have complained about a bunch of
objtool warnings.  These patches fix all known warnings.

Patch 1 is a repost of a previous fix -- unrelated to GCC 8, but a
prereq for the following two patches.

Patch 2 fixes the vast majority of the warnings, caused by GCC 8's new
usage of "cold" subfunctions for unlikely text.

Patch 3 fixes a few more warnings, related to switch tables.

Josh Poimboeuf (3):
  objtool: Fix "noreturn" detection for recursive sibling calls
  objtool: Support GCC 8 cold subfunctions
  objtool: Support GCC 8 switch tables

 tools/objtool/check.c | 125 ++++++++++++++++++++++++++----------------
 tools/objtool/elf.c   |  42 +++++++++++++-
 tools/objtool/elf.h   |   2 +
 3 files changed, 121 insertions(+), 48 deletions(-)

-- 
2.17.0



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