kernel-hardening - Re: [PATCH v5 2/5] GCC plugin infrastructure

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Message-ID: <CAK7LNATK-r09tJ5K8u8vRdRR0dXywAJ=LbbhaigZkfMm3UUPmA@mail.gmail.com>
Date: Sat, 26 Mar 2016 11:39:32 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: Emese Revfy <re.emese@...il.com>
Cc: Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        pageexec@...email.hu, spender@...ecurity.net,
        kernel-hardening@...ts.openwall.com, Michal Marek <mmarek@...e.com>,
        Kees Cook <keescook@...omium.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>, fengguang.wu@...el.com,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 2/5] GCC plugin infrastructure

Hi Emese,



2016-03-24 9:07 GMT+09:00 Emese Revfy <re.emese@...il.com>:
> On Fri, 11 Mar 2016 15:25:19 +0900
> Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:
>
>> You sprinkle "gcc-plugins" target in the top Makefile, which I do not like.
>>
>> Can you descend into scripts/gcc-plugins from scripts/Makefile?
>>
>>
>>  subdir-$(CONFIG_MODVERSIONS) += genksyms
>>  subdir-y                     += mod
>>  subdir-$(CONFIG_SECURITY_SELINUX) += selinux
>>  subdir-$(CONFIG_DTC)         += dtc
>>  subdir-$(CONFIG_GDB_SCRIPTS) += gdb
>> +subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins
>>
>>
>> This is how other host tools do, I think.
>
> Hi,
>
> I tried to remove the gcc-plugins target but sadly in this case the plugins aren't complied.
> I don't know if I understand how it should work. I pushed a commit:
> https://github.com/ephox-gcc-plugins/gcc-plugins_linux-next/commit/0b005b886bde6c4b9134d01f830d88d464911a65
> Could you please help me with what I did wrong?
>


Sorry, I missed this problem.

GCC-plugins must be compiled before descending into ./Kbuild.


Please apply the following on top of commit 0b005b88
and check if it works.




diff --git a/Makefile b/Makefile
index 1c7a379..bd643d3 100644
--- a/Makefile
+++ b/Makefile
@@ -1009,6 +1009,9 @@ archprepare: archheaders archscripts prepare1
scripts_basic
 prepare0: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
 prepare0: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
 prepare0: archprepare FORCE
+ifdef CONFIG_GCC_PLUGINS
+       $(Q)$(MAKE) $(build)=scripts/gcc-plugins
+endif
        $(Q)$(MAKE) $(build)=.

 # All the preparing..
diff --git a/scripts/Makefile b/scripts/Makefile
index 0ba652c..1d80897 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -45,7 +45,6 @@ subdir-y                     += mod
 subdir-$(CONFIG_SECURITY_SELINUX) += selinux
 subdir-$(CONFIG_DTC)         += dtc
 subdir-$(CONFIG_GDB_SCRIPTS) += gdb
-subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins

 # Let clean descend into subdirs
-subdir-        += basic kconfig package
+subdir-        += basic kconfig package gcc-plugins





-- 
Best Regards
Masahiro Yamada

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