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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 v4 2/8] ARM: ftrace: Define ftrace_stub_graph
Date: Thu, 28 Mar 2024 09:19:25 +0100	[thread overview]
Message-ID: <20240328-arm32-cfi-v4-2-a11046139125@linaro.org> (raw)
In-Reply-To: <20240328-arm32-cfi-v4-0-a11046139125@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

-- 
2.44.0


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 v4 2/8] ARM: ftrace: Define ftrace_stub_graph
Date: Thu, 28 Mar 2024 09:19:25 +0100	[thread overview]
Message-ID: <20240328-arm32-cfi-v4-2-a11046139125@linaro.org> (raw)
In-Reply-To: <20240328-arm32-cfi-v4-0-a11046139125@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

-- 
2.44.0


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

  parent reply	other threads:[~2024-03-28  8:19 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-28  8:19 [PATCH v4 0/8] CFI for ARM32 using LLVM Linus Walleij
2024-03-28  8:19 ` Linus Walleij
2024-03-28  8:19 ` [PATCH v4 1/8] ARM: bugs: Check in the vtable instead of defined aliases Linus Walleij
2024-03-28  8:19   ` Linus Walleij
2024-03-28  8:19 ` Linus Walleij [this message]
2024-03-28  8:19   ` [PATCH v4 2/8] ARM: ftrace: Define ftrace_stub_graph Linus Walleij
2024-03-28  8:19 ` [PATCH v4 3/8] ARM: mm: Make tlbflush routines CFI safe Linus Walleij
2024-03-28  8:19   ` Linus Walleij
2024-03-28  8:19 ` [PATCH v4 4/8] ARM: mm: Rewrite cacheflush vtables in CFI safe C Linus Walleij
2024-03-28  8:19 ` [PATCH v4 5/8] ARM: mm: Define prototypes for all per-processor calls Linus Walleij
2024-03-28  8:19   ` Linus Walleij
2024-03-28  8:19 ` [PATCH v4 6/8] ARM: lib: Annotate loop delay instructions for CFI Linus Walleij
2024-03-28  8:19   ` Linus Walleij
2024-03-28  8:19 ` [PATCH v4 7/8] ARM: hw_breakpoint: Handle CFI breakpoints Linus Walleij
2024-03-28  8:19   ` Linus Walleij
2024-04-04 21:26   ` Kees Cook
2024-04-04 21:26     ` Kees Cook
2024-03-28  8:19 ` [PATCH v4 8/8] ARM: Support CLANG CFI Linus Walleij
2024-03-28  8:19   ` Linus Walleij
2024-04-04 21:27 ` [PATCH v4 0/8] CFI for ARM32 using LLVM Kees Cook
2024-04-04 21:27   ` Kees Cook
2024-04-12  7:38 ` Linus Walleij
2024-04-12  7:38   ` Linus Walleij
2024-04-12 22:07   ` Nathan Chancellor
2024-04-12 22:07     ` Nathan Chancellor

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