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From: Linus Walleij <linus.walleij@linaro.org>
To: Russell King <linux@armlinux.org.uk>,
	 Sami Tolvanen <samitolvanen@google.com>,
	Kees Cook <keescook@chromium.org>,
	 Nathan Chancellor <nathan@kernel.org>,
	 Nick Desaulniers <ndesaulniers@google.com>,
	 Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Cc: linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev,
	 Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH v2 8/9] ARM: ftrace: Define ftrace_stub_graph
Date: Thu, 07 Mar 2024 15:22:07 +0100	[thread overview]
Message-ID: <20240307-arm32-cfi-v2-8-cc74ea0306b3@linaro.org> (raw)
In-Reply-To: <20240307-arm32-cfi-v2-0-cc74ea0306b3@linaro.org>

Several architectures defines this stub for the graph tracer,
and it is needed for CFI, as it needs a separate symbol for it.
The trick from include/asm-generic/vmlinux.lds.h to define
ftrace_stub_graph to ftrace_stub isn't working when using CFI.
Commit 883bbbffa5a4 contains the details.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/kernel/entry-ftrace.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/kernel/entry-ftrace.S b/arch/arm/kernel/entry-ftrace.S
index 3e7bcaca5e07..bc598e3d8dd2 100644
--- a/arch/arm/kernel/entry-ftrace.S
+++ b/arch/arm/kernel/entry-ftrace.S
@@ -271,6 +271,10 @@ ENTRY(ftrace_stub)
 	ret	lr
 ENDPROC(ftrace_stub)
 
+ENTRY(ftrace_stub_graph)
+	ret	lr
+ENDPROC(ftrace_stub_graph)
+
 #ifdef CONFIG_DYNAMIC_FTRACE
 
 	__INIT

-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Linus Walleij <linus.walleij@linaro.org>
To: Russell King <linux@armlinux.org.uk>,
	 Sami Tolvanen <samitolvanen@google.com>,
	Kees Cook <keescook@chromium.org>,
	 Nathan Chancellor <nathan@kernel.org>,
	 Nick Desaulniers <ndesaulniers@google.com>,
	 Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Cc: linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev,
	 Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH v2 8/9] ARM: ftrace: Define ftrace_stub_graph
Date: Thu, 07 Mar 2024 15:22:07 +0100	[thread overview]
Message-ID: <20240307-arm32-cfi-v2-8-cc74ea0306b3@linaro.org> (raw)
In-Reply-To: <20240307-arm32-cfi-v2-0-cc74ea0306b3@linaro.org>

Several architectures defines this stub for the graph tracer,
and it is needed for CFI, as it needs a separate symbol for it.
The trick from include/asm-generic/vmlinux.lds.h to define
ftrace_stub_graph to ftrace_stub isn't working when using CFI.
Commit 883bbbffa5a4 contains the details.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/kernel/entry-ftrace.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/kernel/entry-ftrace.S b/arch/arm/kernel/entry-ftrace.S
index 3e7bcaca5e07..bc598e3d8dd2 100644
--- a/arch/arm/kernel/entry-ftrace.S
+++ b/arch/arm/kernel/entry-ftrace.S
@@ -271,6 +271,10 @@ ENTRY(ftrace_stub)
 	ret	lr
 ENDPROC(ftrace_stub)
 
+ENTRY(ftrace_stub_graph)
+	ret	lr
+ENDPROC(ftrace_stub_graph)
+
 #ifdef CONFIG_DYNAMIC_FTRACE
 
 	__INIT

-- 
2.34.1


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2024-03-07 14:22 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-07 14:21 [PATCH v2 0/9] CFI for ARM32 using LLVM Linus Walleij
2024-03-07 14:21 ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 1/9] ARM: Support CLANG CFI Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 2/9] ARM: tlbflush: Make TLB flushes into static inlines Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 3/9] ARM: bugs: Check in the vtable instead of defined aliases Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 4/9] ARM: proc: Use inlines instead of defines Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 5/9] ARM: delay: Turn delay functions into static inlines Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 6/9] ARM: turn CPU cache flush " Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` [PATCH v2 7/9] ARM: page: Turn highpage accesses " Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 14:22 ` Linus Walleij [this message]
2024-03-07 14:22   ` [PATCH v2 8/9] ARM: ftrace: Define ftrace_stub_graph Linus Walleij
2024-03-07 14:22 ` [PATCH v2 9/9] ARM: KCFI: Allow permissive CFI mode Linus Walleij
2024-03-07 14:22   ` Linus Walleij
2024-03-07 18:58   ` Kees Cook
2024-03-07 18:58     ` Kees Cook

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