linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Josh Poimboeuf <jpoimboe@kernel.org>
To: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org,
	Sathvika Vasireddy <sv@linux.ibm.com>,
	aik@ozlabs.ru, chenzhongjin@huawei.com,
	christophe.leroy@csgroup.eu, jpoimboe@redhat.com,
	linux-kernel@vger.kernel.org, mbenes@suse.cz, mingo@redhat.com,
	mpe@ellerman.id.au, npiggin@gmail.com, peterz@infradead.org,
	rostedt@goodmis.org
Subject: Re: [PATCH v4 11/16] objtool: Add --mnop as an option to --mcount
Date: Tue, 11 Oct 2022 13:33:32 -0700	[thread overview]
Message-ID: <20221011203332.zzmv6awd5eiydxgw@treble> (raw)
In-Reply-To: <1665401725.d3dolquorh.naveen@linux.ibm.com>

On Mon, Oct 10, 2022 at 05:07:46PM +0530, Naveen N. Rao wrote:
> > +++ b/scripts/Makefile.lib
> > @@ -234,6 +234,7 @@ objtool_args =								\
> >  	$(if $(CONFIG_HAVE_NOINSTR_HACK), --hacks=noinstr)		\
> >  	$(if $(CONFIG_X86_KERNEL_IBT), --ibt)				\
> >  	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)		\
> > +	$(if $(CONFIG_HAVE_OBJTOOL_NOP_MCOUNT), --mnop)                 \
> 
> This still won't help: for instance, if CONFIG_FTRACE itself is disabled. I
> think we should make this depend on CONFIG_FTRACE_MCOUNT_USE_OBJTOOL. The
> below change works for me:
> 
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index 54d2d6451bdacc..fd3f55a1fdb7bb 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -245,8 +245,8 @@ objtool_args =                                                              \
>        $(if $(CONFIG_HAVE_JUMP_LABEL_HACK), --hacks=jump_label)        \
>        $(if $(CONFIG_HAVE_NOINSTR_HACK), --hacks=noinstr)              \
>        $(if $(CONFIG_X86_KERNEL_IBT), --ibt)                           \
> -       $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)             \
> -       $(if $(CONFIG_HAVE_OBJTOOL_NOP_MCOUNT), --mnop)                 \
> +        $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL),                       \
> +             $(if $(CONFIG_HAVE_OBJTOOL_NOP_MCOUNT), --mcount --mnop, --mcount)) \
>        $(if $(CONFIG_UNWINDER_ORC), --orc)                             \
>        $(if $(CONFIG_RETPOLINE), --retpoline)                          \
>        $(if $(CONFIG_RETHUNK), --rethunk)                              \

This has a new conflict, may need something like:

--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -256,6 +256,9 @@ objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK)		+= --hacks=jump_label
 objtool-args-$(CONFIG_HAVE_NOINSTR_HACK)		+= --hacks=noinstr
 objtool-args-$(CONFIG_X86_KERNEL_IBT)			+= --ibt
 objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL)	+= --mcount
+ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
+objtool-args-$(CONFIG_HAVE_OBJTOOL_NOP_MCOUNT)		+= --mnop
+endif
 objtool-args-$(CONFIG_UNWINDER_ORC)			+= --orc
 objtool-args-$(CONFIG_RETPOLINE)			+= --retpoline
 objtool-args-$(CONFIG_RETHUNK)				+= --rethunk

  reply	other threads:[~2022-10-11 20:33 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-02 10:42 [PATCH v4 00/16] objtool: Enable and implement --mcount option on powerpc Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 01/16] powerpc: Fix __WARN_FLAGS() for use with Objtool Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 02/16] powerpc: Override __ALIGN and __ALIGN_STR macros Sathvika Vasireddy
2022-10-02 17:41   ` Christophe Leroy
2022-10-02 10:42 ` [PATCH v4 03/16] powerpc: Fix objtool unannotated intra-function call warnings Sathvika Vasireddy
2022-10-10 11:34   ` Naveen N. Rao
2022-10-02 10:42 ` [PATCH v4 04/16] powerpc: Curb objtool unannotated intra-function warnings Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 05/16] powerpc: Skip objtool from running on drivers/crypto/vmx/aesp8-ppc.o Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 06/16] powerpc: Fix objtool unannotated intra-function call warnings on PPC32 Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 07/16] powerpc: Skip objtool from running on VDSO files Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 08/16] objtool: Fix SEGFAULT Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 09/16] objtool: Use target file endianness instead of a compiled constant Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 10/16] objtool: Use target file class size " Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 11/16] objtool: Add --mnop as an option to --mcount Sathvika Vasireddy
2022-10-02 17:40   ` Christophe Leroy
2022-10-10 11:37   ` Naveen N. Rao
2022-10-11 20:33     ` Josh Poimboeuf [this message]
2022-10-12 13:47       ` Naveen N. Rao
2022-10-02 10:42 ` [PATCH v4 12/16] objtool: Read special sections with alts only when specific options are selected Sathvika Vasireddy
2022-10-02 17:42   ` Christophe Leroy
2022-10-02 10:42 ` [PATCH v4 13/16] objtool: Use macros to define arch specific reloc types Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 14/16] objtool: Add arch specific function arch_ftrace_match() Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 15/16] objtool/powerpc: Enable objtool to be built on ppc Sathvika Vasireddy
2022-10-02 10:42 ` [PATCH v4 16/16] objtool/powerpc: Add --mcount specific implementation Sathvika Vasireddy
2022-10-02 17:42   ` Christophe Leroy
2022-10-10 11:49 ` [PATCH v4 00/16] objtool: Enable and implement --mcount option on powerpc Naveen N. Rao
     [not found]   ` <notmuch-sha1-66fb111b87471c685a53b80a0502d959f90d07a7>
2022-10-13  0:05     ` Josh Poimboeuf
2022-10-13  3:40       ` Naveen N. Rao

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20221011203332.zzmv6awd5eiydxgw@treble \
    --to=jpoimboe@kernel.org \
    --cc=aik@ozlabs.ru \
    --cc=chenzhongjin@huawei.com \
    --cc=christophe.leroy@csgroup.eu \
    --cc=jpoimboe@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mbenes@suse.cz \
    --cc=mingo@redhat.com \
    --cc=mpe@ellerman.id.au \
    --cc=naveen.n.rao@linux.vnet.ibm.com \
    --cc=npiggin@gmail.com \
    --cc=peterz@infradead.org \
    --cc=rostedt@goodmis.org \
    --cc=sv@linux.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).