linux-kernel - Re: [tip:core/objtool] objtool: Add CONFIG_STACK

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Date:	Thu, 3 Mar 2016 15:12:01 +0100
From:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To:	jslaby@...e.cz, acme@...nel.org, chris.j.arges@...onical.com,
	hpa@...or.com, namhyung@...il.com, palves@...hat.com, bp@...en8.de,
	jpoimboe@...hat.com, luto@...nel.org,
	torvalds@...ux-foundation.org, bernd@...rovitsch.priv.at,
	mmarek@...e.cz, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, mingo@...nel.org, peterz@...radead.org,
	tglx@...utronix.de
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:core/objtool] objtool: Add CONFIG_STACK_VALIDATION option

On 2016-02-29 03:01:35 [-0800], tip-bot for Josh Poimboeuf wrote:
> Gitweb:     http://git.kernel.org/tip/b9ab5ebb14ec389bd80f66613f1fe3f8f65f2521
> Author:     Josh Poimboeuf <jpoimboe@...hat.com>
> objtool: Add CONFIG_STACK_VALIDATION option
> 
> Add a CONFIG_STACK_VALIDATION option which will run "objtool check" for
> each .o file to ensure the validity of its stack metadata.

|./mk-x86-64.sh -j1
|make[1]: Entering directory '/home/bigeasy/linux-tip/build/linux-x8664'
|  CHK     include/config/kernel.release
|  Using /home/bigeasy/linux-tip as source for kernel
|  GEN     ./Makefile
|  CHK     include/generated/uapi/linux/version.h
|  CHK     include/generated/utsrelease.h
|  CHK     include/generated/bounds.h
|  CHK     include/generated/timeconst.h
|  CHK     include/generated/asm-offsets.h
|  CALL    /home/bigeasy/linux-tip/scripts/checksyscalls.sh
|scripts/Makefile.include:3: *** O=build/linux-x8664 does not exist.  Stop.
|/home/bigeasy/linux-tip/Makefile:1518: recipe for target 'tools/objtool' failed
|make[1]: *** [tools/objtool] Error 2
|make[1]: Leaving directory '/home/bigeasy/linux-tip/build/linux-x8664'
|Makefile:146: recipe for target 'sub-make' failed
|make: *** [sub-make] Error 2

with
|$ cat mk-x86-64.sh 
|#!/bin/sh
|export PATH=/usr/lib/ccache/:$PATH
|exec make O=build/linux-x8664 -j 8 $*

Is this know? I tried the TIP tree as of now. It works with
CONFIG_STACK_VALIDATION=n

Sebastian