From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: Sami Tolvanen <samitolvanen@google.com>,
linux-kernel@vger.kernel.org,
Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>,
Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH 01/13] kbuild: move objtool_args back to scripts/Makefile.build
Date: Thu, 19 Aug 2021 09:57:32 +0900 [thread overview]
Message-ID: <20210819005744.644908-2-masahiroy@kernel.org> (raw)
In-Reply-To: <20210819005744.644908-1-masahiroy@kernel.org>
Commit b1a1a1a09b46 ("kbuild: lto: postpone objtool") moved objtool_args
to Makefile.lib, so the arguments can be used in Makefile.modfinal as
well as Makefile.build.
With commit 2b1d7fc05467 ("kbuild: Fix TRIM_UNUSED_KSYMS with
LTO_CLANG"), module LTO linking came back to scripts/Makefile.build
again.
So, there is no more reason to keep objtool_args separately in
scripts/Makefile.lib.
Get it back to the original place, close to the objtool command.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
scripts/Makefile.build | 13 +++++++++++++
scripts/Makefile.lib | 12 ------------
2 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index ea549579bfb7..31154e44c251 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -222,6 +222,19 @@ cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)),
endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
ifdef CONFIG_STACK_VALIDATION
+
+# Objtool arguments are also needed for modfinal with LTO, so we define
+# then here to avoid duplication.
+objtool_args = \
+ $(if $(CONFIG_UNWINDER_ORC),orc generate,check) \
+ $(if $(part-of-module), --module,) \
+ $(if $(CONFIG_FRAME_POINTER),, --no-fp) \
+ $(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), \
+ --no-unreachable,) \
+ $(if $(CONFIG_RETPOLINE), --retpoline,) \
+ $(if $(CONFIG_X86_SMAP), --uaccess,) \
+ $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,)
+
ifndef CONFIG_LTO_CLANG
__objtool_obj := $(objtree)/tools/objtool/objtool
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index af1c920a585c..34c4c11c4bc1 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -232,18 +232,6 @@ ifeq ($(CONFIG_LTO_CLANG),y)
mod-prelink-ext := .lto
endif
-# Objtool arguments are also needed for modfinal with LTO, so we define
-# then here to avoid duplication.
-objtool_args = \
- $(if $(CONFIG_UNWINDER_ORC),orc generate,check) \
- $(if $(part-of-module), --module,) \
- $(if $(CONFIG_FRAME_POINTER),, --no-fp) \
- $(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), \
- --no-unreachable,) \
- $(if $(CONFIG_RETPOLINE), --retpoline,) \
- $(if $(CONFIG_X86_SMAP), --uaccess,) \
- $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,)
-
# Useful for describing the dependency of composite objects
# Usage:
# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
--
2.30.2
next prev parent reply other threads:[~2021-08-19 0:58 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-19 0:57 [PATCH 00/13] kbuild: refactoring after Clang LTO Masahiro Yamada
2021-08-19 0:57 ` Masahiro Yamada [this message]
2021-08-19 2:45 ` [PATCH 01/13] kbuild: move objtool_args back to scripts/Makefile.build Kees Cook
2021-08-19 0:57 ` [PATCH 02/13] gen_compile_commands: extract compiler command from a series of commands Masahiro Yamada
2021-08-19 6:48 ` Kees Cook
2021-08-19 0:57 ` [PATCH 03/13] kbuild: detect objtool changes correctly and remove .SECONDEXPANSION Masahiro Yamada
2021-08-19 2:55 ` Kees Cook
2021-08-19 3:18 ` Masahiro Yamada
2021-08-19 0:57 ` [PATCH 04/13] kbuild: remove unused quiet_cmd_update_lto_symversions Masahiro Yamada
2021-08-19 6:19 ` Kees Cook
2021-08-19 0:57 ` [PATCH 05/13] kbuild: remove stale *.symversions Masahiro Yamada
2021-08-19 6:29 ` Kees Cook
2021-08-19 0:57 ` [PATCH 06/13] kbuild: merge vmlinux_link() between the ordinary link and Clang LTO Masahiro Yamada
2021-08-19 2:42 ` Kees Cook
2021-08-19 0:57 ` [PATCH 07/13] kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh Masahiro Yamada
2021-08-19 6:32 ` Kees Cook
2021-08-19 0:57 ` [PATCH 08/13] kbuild: merge vmlinux_link() between ARCH=um and other architectures Masahiro Yamada
2021-08-19 2:43 ` Kees Cook
2021-08-19 0:57 ` [PATCH 09/13] kbuild: do not create built-in.a.symversions or lib.a.symversions Masahiro Yamada
2021-08-19 6:41 ` Kees Cook
2021-08-28 11:57 ` Masahiro Yamada
2021-08-19 0:57 ` [PATCH 10/13] kbuild: build modules in the same way with/without Clang LTO Masahiro Yamada
2021-08-19 6:59 ` Kees Cook
2021-08-19 8:11 ` Masahiro Yamada
2021-08-19 0:57 ` [PATCH 11/13] kbuild: always postpone CRC links for module versioning Masahiro Yamada
2021-08-19 6:43 ` Kees Cook
2021-08-19 0:57 ` [PATCH 12/13] kbuild: merge cmd_modversions_c and cmd_modversions_S Masahiro Yamada
2021-08-19 3:06 ` Kees Cook
2021-08-19 0:57 ` [PATCH 13/13] kbuild: merge cmd_ar_builtin and cmd_ar_module Masahiro Yamada
2021-08-19 3:01 ` Kees Cook
2021-08-25 4:57 ` [PATCH 00/13] kbuild: refactoring after Clang LTO Masahiro Yamada
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