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 [thread overview]
Message-ID: <20200501084215.242-1-dima@golovin.in> (raw)
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>
---
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
--
2.25.1
next reply other threads:[~2020-05-01 8:50 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-01 8:42 Dmitry Golovin [this message]
2020-05-02 3:43 ` [PATCH] x86/boot: allow a relocatable kernel to be linked with lld Nathan Chancellor
2020-05-15 18:50 ` Borislav Petkov
[not found] ` <602331589572661@mail.yandex.ru>
2020-05-17 19:44 ` Fangrui Song
2020-05-17 20:25 ` Arvind Sankar
2020-05-18 19:10 ` Nick Desaulniers
2020-05-24 21:28 ` [PATCH 0/4] x86/boot: Remove runtime relocations from compressed kernel Arvind Sankar
2020-05-25 7:10 ` Ard Biesheuvel
2020-05-25 22:59 ` [PATCH v2 " Arvind Sankar
2020-05-26 12:29 ` Sedat Dilek
2020-05-26 12:30 ` Ard Biesheuvel
2020-05-26 12:33 ` Sedat Dilek
2020-05-26 12:44 ` Sedat Dilek
2020-05-26 14:47 ` Arvind Sankar
2020-05-26 14:50 ` Sedat Dilek
2020-05-26 15:36 ` Arvind Sankar
2020-05-26 15:38 ` Sedat Dilek
2020-05-27 6:26 ` Sedat Dilek
2020-05-26 14:48 ` Sedat Dilek
2020-05-26 14:55 ` Sedat Dilek
2020-05-26 15:07 ` Sedat Dilek
2020-05-26 15:31 ` Arvind Sankar
2020-05-27 6:24 ` Sedat Dilek
2020-05-26 16:18 ` Sedat Dilek
2020-05-25 22:59 ` [PATCH v2 1/4] x86/boot: Add .text.* to setup.ld Arvind Sankar
2020-05-25 22:59 ` [PATCH v2 2/4] x86/boot: Remove run-time relocations from .head.text code Arvind Sankar
2020-05-25 22:59 ` [PATCH v2 3/4] x86/boot: Remove runtime relocations from head_{32,64}.S Arvind Sankar
2020-05-25 22:59 ` [PATCH v2 4/4] x86/boot: Check that there are no runtime relocations Arvind Sankar
2020-05-26 6:11 ` Ard Biesheuvel
2020-05-26 15:16 ` Arvind Sankar
2020-05-26 17:13 ` Fangrui Song
2020-05-26 19:14 ` Arvind Sankar
2020-08-06 11:19 ` Andy Shevchenko
2020-08-06 16:12 ` Arvind Sankar
2020-05-26 0:37 ` [PATCH 0/4] x86/boot: Remove runtime relocations from compressed kernel Fangrui Song
2020-05-24 21:28 ` [PATCH 1/4] x86/boot: Add .text.startup to setup.ld Arvind Sankar
2020-05-24 22:13 ` Fangrui Song
2020-05-24 23:00 ` Arvind Sankar
2020-05-24 23:49 ` Fangrui Song
2020-05-24 22:48 ` Brian Gerst
2020-05-24 21:28 ` [PATCH 2/4] x86/boot: Remove runtime relocations from .head.text code Arvind Sankar
2020-05-24 22:53 ` Fangrui Song
2020-05-24 23:44 ` Arvind Sankar
2020-05-25 0:55 ` Fangrui Song
2020-05-24 21:28 ` [PATCH 3/4] x86/boot: Remove runtime relocations from head_{32,64}.S Arvind Sankar
2020-05-24 23:22 ` Fangrui Song
2020-05-24 23:58 ` Arvind Sankar
2020-05-24 21:28 ` [PATCH 4/4] x86/boot: Check that there are no runtime relocations Arvind Sankar
2020-05-24 23:36 ` Fangrui Song
2020-05-24 23:57 ` Arvind Sankar
2020-05-25 6:10 ` Ard Biesheuvel
2020-05-25 16:26 ` Fangrui Song
2020-05-25 19:22 ` Arvind Sankar
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