ClangBuiltLinux · nickdesaulniers · May 7, 2020 · May 7, 2020 · May 7, 2020 · May 7, 2020
@@ -24,8 +24,8 @@ jobs:
       env: ARCH=riscv LLVM_IAS=1
     - name: "ARCH=s390 BOOT=0"
       env: ARCH=s390
-    - name: "ARCH=x86"
-      env: ARCH=x86
+    - name: "ARCH=x86 LD=ld.lld"
+      env: ARCH=x86 LD=ld.lld
     - name: "ARCH=x86_64 LD=ld.lld"
       env: ARCH=x86_64 LD=ld.lld
     # linux (cron only)
@@ -64,8 +64,8 @@ jobs:
     - name: "ARCH=s390 BOOT=0 REPO=linux-next"
       env: ARCH=s390 REPO=linux-next
       if: type = cron
-    - name: "ARCH=x86 REPO=linux-next"
-      env: ARCH=x86 REPO=linux-next
+    - name: "ARCH=x86 LD=ld.lld REPO=linux-next"
+      env: ARCH=x86 LD=ld.lld REPO=linux-next
       if: type = cron
     - name: "ARCH=x86_64 LD=ld.lld REPO=linux-next"
       env: ARCH=x86_64 LD=ld.lld REPO=linux-next

@@ -0,0 +1,101 @@
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+        (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits))
+        (Client certificate not present)
+From: Dmitry Golovin <dima@golovin.in>
+To: clang-built-linux@googlegroups.com
+Cc: Dmitry Golovin <dima@golovin.in>,
+        Thomas Gleixner <tglx@linutronix.de>,
+        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
+        x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
+        Nick Desaulniers <ndesaulniers@google.com>,
+        Ard Biesheuvel <ardb@kernel.org>,
+        Masahiro Yamada <masahiroy@kernel.org>,
+        Daniel Kiper <daniel.kiper@oracle.com>,
+        linux-kernel@vger.kernel.org
+Subject: [PATCH] x86/boot: allow a relocatable kernel to be linked with lld
+Date: Fri,  1 May 2020 08:42:13 +0000
+Message-Id: <20200501084215.242-1-dima@golovin.in>
+X-Mailer: git-send-email 2.25.1
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+
+LLD by default disallows relocations in read-only segments. For a
+relocatable kernel, we pass -z notext to the linker to explicitly
+allow relocations. This behavior is the default for BFD.
+
+Link: https://github.com/ClangBuiltLinux/linux/issues/579
+Signed-off-by: Dmitry Golovin <dima@golovin.in>
+Tested-by: Nathan Chancellor <natechancellor@gmail.com>
+---
+ arch/x86/boot/compressed/Makefile | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
+index 5f7c262bcc99..7214751e1671 100644
+--- a/arch/x86/boot/compressed/Makefile
++++ b/arch/x86/boot/compressed/Makefile
+@@ -57,6 +57,9 @@ else
+ KBUILD_LDFLAGS += $(shell $(LD) --help 2>&1 | grep -q "\-z noreloc-overflow" \
+ 	&& echo "-z noreloc-overflow -pie --no-dynamic-linker")
+ endif
++ifeq ($(CONFIG_RELOCATABLE), y)
++KBUILD_LDFLAGS += -z notext
++endif
+ LDFLAGS_vmlinux := -T
+
+ hostprogs	:= mkpiggy
@@ -0,0 +1,101 @@
+From patchwork Fri May  1 08:42:13 2020
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+        (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits))
+        (Client certificate not present)
+From: Dmitry Golovin <dima@golovin.in>
+To: clang-built-linux@googlegroups.com
+Cc: Dmitry Golovin <dima@golovin.in>,
+        Thomas Gleixner <tglx@linutronix.de>,
+        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
+        x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
+        Nick Desaulniers <ndesaulniers@google.com>,
+        Ard Biesheuvel <ardb@kernel.org>,
+        Masahiro Yamada <masahiroy@kernel.org>,
+        Daniel Kiper <daniel.kiper@oracle.com>,
+        linux-kernel@vger.kernel.org
+Subject: [PATCH] x86/boot: allow a relocatable kernel to be linked with lld
+Date: Fri,  1 May 2020 08:42:13 +0000
+Message-Id: <20200501084215.242-1-dima@golovin.in>
+X-Mailer: git-send-email 2.25.1
+MIME-Version: 1.0
+Sender: linux-kernel-owner@vger.kernel.org
+Precedence: bulk
+List-ID: <linux-kernel.vger.kernel.org>
+X-Mailing-List: linux-kernel@vger.kernel.org
+
+LLD by default disallows relocations in read-only segments. For a
+relocatable kernel, we pass -z notext to the linker to explicitly
+allow relocations. This behavior is the default for BFD.
+
+Link: https://github.com/ClangBuiltLinux/linux/issues/579
+Signed-off-by: Dmitry Golovin <dima@golovin.in>
+Tested-by: Nathan Chancellor <natechancellor@gmail.com>
+---
+ arch/x86/boot/compressed/Makefile | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
+index 5f7c262bcc99..7214751e1671 100644
+--- a/arch/x86/boot/compressed/Makefile
++++ b/arch/x86/boot/compressed/Makefile
+@@ -57,6 +57,9 @@ else
+ KBUILD_LDFLAGS += $(shell $(LD) --help 2>&1 | grep -q "\-z noreloc-overflow" \
+ 	&& echo "-z noreloc-overflow -pie --no-dynamic-linker")
+ endif
++ifeq ($(CONFIG_RELOCATABLE), y)
++KBUILD_LDFLAGS += -z notext
++endif
+ LDFLAGS_vmlinux := -T
+
+ hostprogs	:= mkpiggy
@@ -16,7 +16,7 @@ Environment variables:
   ARCH (required):
       If no ARCH value is specified, it's an error; there is no default.
       Currently, arm32_v7, arm32_v6, arm32_v5, arm64, mips, mipsel, ppc32,
-      ppc64, ppc64le, s390, riscv, and x86_64 are supported.
+      ppc64, ppc64le, s390, riscv, x86, and x86_64 are supported.
   CC:
       If no CC value is specified, the script will attempt to set CC to
       clang-10, clang-9, clang-8, clang-7, then clang if they are found