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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 v6 02/11] ARM: ftrace: Define ftrace_stub_graph
Date: Wed, 17 Apr 2024 10:30:51 +0200	[thread overview]
Message-ID: <20240417-arm32-cfi-v6-2-6486385eb136@linaro.org> (raw)
In-Reply-To: <20240417-arm32-cfi-v6-0-6486385eb136@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.

Tested-by: Kees Cook <keescook@chromium.org>
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 v6 02/11] ARM: ftrace: Define ftrace_stub_graph
Date: Wed, 17 Apr 2024 10:30:51 +0200	[thread overview]
Message-ID: <20240417-arm32-cfi-v6-2-6486385eb136@linaro.org> (raw)
In-Reply-To: <20240417-arm32-cfi-v6-0-6486385eb136@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.

Tested-by: Kees Cook <keescook@chromium.org>
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:[~2024-04-17  8:31 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-17  8:30 [PATCH v6 00/11] CFI for ARM32 using LLVM Linus Walleij
2024-04-17  8:30 ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 01/11] ARM: bugs: Check in the vtable instead of defined aliases Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` Linus Walleij [this message]
2024-04-17  8:30   ` [PATCH v6 02/11] ARM: ftrace: Define ftrace_stub_graph Linus Walleij
2024-04-17  8:30 ` [PATCH v6 03/11] ARM: mm: Make tlbflush routines CFI safe Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 04/11] ARM: mm: Type-annotate all cache assembly routines Linus Walleij
2024-04-17  8:30 ` [PATCH v6 05/11] ARM: mm: Use symbol alias for two cache functions Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 06/11] ARM: mm: Rewrite cacheflush vtables in CFI safe C Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 07/11] ARM: mm: Type-annotate all per-processor assembly routines Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 08/11] ARM: mm: Define prototypes for all per-processor calls Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 09/11] ARM: lib: Annotate loop delay instructions for CFI Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-17  8:30 ` [PATCH v6 10/11] ARM: hw_breakpoint: Handle CFI breakpoints Linus Walleij
2024-04-17  8:30   ` Linus Walleij
2024-04-18 16:12   ` Sami Tolvanen
2024-04-18 16:12     ` Sami Tolvanen
2024-04-19 12:56     ` Linus Walleij
2024-04-19 12:56       ` Linus Walleij
2024-04-19 21:25       ` Sami Tolvanen
2024-04-19 21:25         ` Sami Tolvanen
2024-04-17  8:31 ` [PATCH v6 11/11] ARM: Support CLANG CFI Linus Walleij
2024-04-17  8:31   ` Linus Walleij

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