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From: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
To: mricon@kernel.org
Subject: [PATCH v5 18/21] x86/tools/relocs: Ignore __kcfi_typeid_ relocations
Date: Thu, 01 Sep 2022 15:29:03 -0400	[thread overview]
Message-ID: <20220901-kcfi_support-v5-18-be2007d8da63@linuxfoundation.org> (raw)
In-Reply-To: <20220901-kcfi_support-v5-0-be2007d8da63@linuxfoundation.org>

From: Sami Tolvanen <samitolvanen@google.com>

The compiler generates __kcfi_typeid_ symbols for annotating assembly
functions with type information. These are constants that can be
referenced in assembly code and are resolved by the linker. Ignore
them in relocs.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>

diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index e2c5b296120d..2925074b9a58 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -56,6 +56,7 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
 	"^(xen_irq_disable_direct_reloc$|"
 	"xen_save_fl_direct_reloc$|"
 	"VDSO|"
+	"__kcfi_typeid_|"
 	"__crc_)",
 
 /*

-- 
b4 0.10.0-dev-03aea

  parent reply	other threads:[~2022-09-01 19:29 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-01 19:28 [PATCH v5 00/21] KCFI support Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 01/21] treewide: Filter out CC_FLAGS_CFI Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 02/21] scripts/kallsyms: Ignore __kcfi_typeid_ Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 03/21] cfi: Remove CONFIG_CFI_CLANG_SHADOW Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 04/21] cfi: Drop __CFI_ADDRESSABLE Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 05/21] cfi: Switch to -fsanitize=kcfi Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 06/21] cfi: Add type helper macros Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 07/21] lkdtm: Emit an indirect call for CFI tests Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 08/21] psci: Fix the function type for psci_initcall_t Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 09/21] arm64: Add types to indirect called assembly functions Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 10/21] arm64: Add CFI error handling Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 11/21] arm64: Drop unneeded __nocfi attributes Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 12/21] init: Drop __nocfi from __init Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 13/21] treewide: Drop function_nocfi Konstantin Ryabitsev
2022-09-01 19:28 ` [PATCH v5 14/21] treewide: Drop WARN_ON_FUNCTION_MISMATCH Konstantin Ryabitsev
2022-09-01 19:29 ` [PATCH v5 15/21] treewide: Drop __cficanonical Konstantin Ryabitsev
2022-09-01 19:29 ` [PATCH v5 16/21] objtool: Disable CFI warnings Konstantin Ryabitsev
2022-09-01 19:29 ` [PATCH v5 17/21] kallsyms: Drop CONFIG_CFI_CLANG workarounds Konstantin Ryabitsev
2022-09-01 19:29 ` Konstantin Ryabitsev [this message]
2022-09-01 19:29 ` [PATCH v5 19/21] x86: Add types to indirectly called assembly functions Konstantin Ryabitsev
2022-09-01 19:29 ` [PATCH v5 20/21] x86/purgatory: Disable CFI Konstantin Ryabitsev
2022-09-01 19:29 ` [PATCH v5 21/21] x86: Add support for CONFIG_CFI_CLANG Konstantin Ryabitsev

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