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 v5 02/10] ARM: ftrace: Define ftrace_stub_graph
Date: Mon, 15 Apr 2024 15:43:21 +0200 [thread overview]
Message-ID: <20240415-arm32-cfi-v5-2-ff11093eeccc@linaro.org> (raw)
In-Reply-To: <20240415-arm32-cfi-v5-0-ff11093eeccc@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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next prev parent reply other threads:[~2024-04-15 13:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-15 13:43 [PATCH v5 00/10] CFI for ARM32 using LLVM Linus Walleij
2024-04-15 13:43 ` [PATCH v5 01/10] ARM: bugs: Check in the vtable instead of defined aliases Linus Walleij
2024-04-15 13:43 ` Linus Walleij [this message]
2024-04-15 13:43 ` [PATCH v5 03/10] ARM: mm: Make tlbflush routines CFI safe Linus Walleij
2024-04-15 13:43 ` [PATCH v5 05/10] ARM: mm: Rewrite cacheflush vtables in CFI safe C Linus Walleij
2024-04-15 13:43 ` [PATCH v5 06/10] ARM: mm Type-annotate all per-processor assembly routines Linus Walleij
2024-04-15 13:43 ` [PATCH v5 07/10] ARM: mm: Define prototypes for all per-processor calls Linus Walleij
2024-04-15 13:43 ` [PATCH v5 08/10] ARM: lib: Annotate loop delay instructions for CFI Linus Walleij
2024-04-15 13:43 ` [PATCH v5 09/10] ARM: hw_breakpoint: Handle CFI breakpoints Linus Walleij
2024-04-15 13:43 ` [PATCH v5 10/10] ARM: Support CLANG CFI Linus Walleij
[not found] ` <20240415-arm32-cfi-v5-4-ff11093eeccc@linaro.org>
2024-04-15 16:35 ` [PATCH v5 04/10] ARM: mm: Type-annotate all cache assembly routines Ard Biesheuvel
2024-04-16 7:38 ` Linus Walleij
2024-04-29 13:18 ` Russell King (Oracle)
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