linux-kernel - [PATCH] ARM: do not assemble iwmmxt.S with LLVM toolchain

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200409232728.231527-1-caij2003@gmail.com>
Date:   Thu,  9 Apr 2020 16:27:26 -0700
From:   Jian Cai <caij2003@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     caij2003@...il.com, ndesaulniers@...gle.com, manojgupta@...gle.com,
        Peter.Smith@....com, stefan@...er.ch, samitolvanen@...gle.com,
        ilie.halip@...il.com, jiancai@...gle.com,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Doug Anderson <armlinux@...isordat.com>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Patrick Bellasi <patrick.bellasi@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        David Howells <dhowells@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: [PATCH] ARM: do not assemble iwmmxt.S with LLVM toolchain

iwmmxt.S contains XScale instructions LLVM ARM backend does not support.
Skip this file if LLVM integrated assemmbler or LLD is used to build ARM
kernel.

Signed-off-by: Jian Cai <caij2003@...il.com>
---
 arch/arm/Kconfig | 2 +-
 init/Kconfig     | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 66a04f6f4775..39de8fc64a73 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -804,7 +804,7 @@ source "arch/arm/mm/Kconfig"
 
 config IWMMXT
 	bool "Enable iWMMXt support"
-	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
+	depends on !AS_IS_CLANG && !LD_IS_LLD && (CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B)
 	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
 	help
 	  Enable support for iWMMXt context switching at run time if
diff --git a/init/Kconfig b/init/Kconfig
index 1c12059e0f7e..b0ab3271e900 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -19,6 +19,12 @@ config GCC_VERSION
 config CC_IS_CLANG
 	def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
 
+config AS_IS_CLANG
+	def_bool $(success,$(AS) --version | head -n 1 | grep -q clang)
+
+config LD_IS_LLD
+	def_bool $(success,$(LD) --version | head -n 1 | grep -q LLD)
+
 config CLANG_VERSION
 	int
 	default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
-- 
2.26.0.110.g2183baf09c-goog