linux-kernel - [RFC PATCH v1 07/23] objtool: Introduce STATIC

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Message-Id: <1687247390-31979-3-git-send-email-tangyouling@loongson.cn>
Date:   Tue, 20 Jun 2023 15:49:48 +0800
From:   Youling Tang <tangyouling@...ngson.cn>
To:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        madvenka@...ux.microsoft.com
Cc:     chenzhongjin@...wei.com, WANG Xuerui <kernel@...0n.name>,
        Xi Ruoyao <xry111@...111.site>, live-patching@...r.kernel.org,
        linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        tangyouling00@...il.com, youling.tang@...look.com
Subject: [RFC PATCH v1 07/23] objtool: Introduce STATIC_CHECK

From: "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>

Objtool currently implements static stack validation. Another method called
dynamic validation can be supported for other architectures.

Define STATIC_CHECK to select the files required for static validation
in objtool build.

Signed-off-by: Madhavan T. Venkataraman <madvenka@...ux.microsoft.com>
---
 tools/objtool/Build    | 6 +++---
 tools/objtool/Makefile | 3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/objtool/Build b/tools/objtool/Build
index 4e9ec210f134..0eec935b52c9 100644
--- a/tools/objtool/Build
+++ b/tools/objtool/Build
@@ -2,13 +2,13 @@ objtool-y += arch/$(SRCARCH)/
 
 objtool-y += weak.o
 
-objtool-y += check.o
-objtool-y += special.o
+objtool-$(STATIC_CHECK) += check.o
+objtool-$(STATIC_CHECK) += special.o
 objtool-y += builtin-check.o
 objtool-y += cfi.o
 objtool-y += insn.o
 objtool-y += decode.o
-objtool-y += unwind_hints.o
+objtool-$(STATIC_CHECK) += unwind_hints.o
 objtool-y += elf.o
 objtool-y += objtool.o
 
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index 83b100c1e7f6..2262b49691b8 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -55,9 +55,10 @@ BUILD_ORC := n
 
 ifeq ($(SRCARCH),x86)
 	BUILD_ORC := y
+	STATIC_CHECK := y
 endif
 
-export BUILD_ORC
+export BUILD_ORC STATIC_CHECK
 export srctree OUTPUT CFLAGS SRCARCH AWK
 include $(srctree)/tools/build/Makefile.include
 
-- 
2.39.2