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From: Raphael Gault <raphael.gault@arm.com>
To: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, jpoimboe@redhat.com
Cc: raph.gault+kdev@gmail.com, peterz@infradead.org,
	catalin.marinas@arm.com, will.deacon@arm.com,
	Raphael Gault <raphael.gault@arm.com>,
	julien.thierry.kdev@gmail.com
Subject: [RFC v4 12/18] arm64: assembler: Add macro to annotate asm function having non standard stack-frame.
Date: Fri, 16 Aug 2019 13:23:57 +0100	[thread overview]
Message-ID: <20190816122403.14994-13-raphael.gault@arm.com> (raw)
In-Reply-To: <20190816122403.14994-1-raphael.gault@arm.com>

Some functions don't have standard stack-frames but are intended
this way. In order for objtool to ignore those particular cases
we add a macro that enables us to annotate the cases we chose
to mark as particular.

Signed-off-by: Raphael Gault <raphael.gault@arm.com>
---
 include/linux/frame.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/linux/frame.h b/include/linux/frame.h
index 02d3ca2d9598..1e35e58ab259 100644
--- a/include/linux/frame.h
+++ b/include/linux/frame.h
@@ -11,14 +11,31 @@
  *
  * For more information, see tools/objtool/Documentation/stack-validation.txt.
  */
+#ifndef __ASSEMBLY__
 #define STACK_FRAME_NON_STANDARD(func) \
 	static void __used __section(.discard.func_stack_frame_non_standard) \
 		*__func_stack_frame_non_standard_##func = func
+#else
+	/*
+	 * This macro is the arm64 assembler equivalent of the
+	 * macro STACK_FRAME_NON_STANDARD define at
+	 * ~/include/linux/frame.h
+	 */
+	.macro	asm_stack_frame_non_standard	func
+	.pushsection ".discard.func_stack_frame_non_standard"
+	.quad	\func
+	.popsection
+	.endm
 
+#endif /* __ASSEMBLY__ */
 #else /* !CONFIG_STACK_VALIDATION */
 
+#ifndef __ASSEMBLY__
 #define STACK_FRAME_NON_STANDARD(func)
-
+#else
+	.macro	asm_stack_frame_non_standard	func
+	.endm
+#endif /* __ASSEMBLY__ */
 #endif /* CONFIG_STACK_VALIDATION */
 
 #endif /* _LINUX_FRAME_H */
-- 
2.17.1


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  parent reply	other threads:[~2019-08-16 12:28 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-16 12:23 [RFC v4 00/18] objtool: Add support for arm64 Raphael Gault
2019-08-16 12:23 ` [RFC v4 01/18] objtool: Add abstraction for computation of symbols offsets Raphael Gault
2019-08-22 16:30   ` Julien
2019-08-22 19:57   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 02/18] objtool: orc: Refactor ORC API for other architectures to implement Raphael Gault
2019-08-22 19:59   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 03/18] objtool: Move registers and control flow to arch-dependent code Raphael Gault
2019-08-22 20:00   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 04/18] objtool: arm64: Add required implementation for supporting the aarch64 architecture in objtool Raphael Gault
2019-08-22 20:00   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 05/18] objtool: special: Adapt special section handling Raphael Gault
2019-08-22 20:02   ` Josh Poimboeuf
2019-08-22 20:18   ` Julien
2019-08-16 12:23 ` [RFC v4 06/18] objtool: arm64: Adapt the stack frame checks for arm architecture Raphael Gault
2019-08-22 20:03   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 07/18] objtool: Introduce INSN_UNKNOWN type Raphael Gault
2019-08-22 20:04   ` Josh Poimboeuf
2019-08-22 20:45     ` Julien
2019-08-22 21:51       ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 08/18] objtool: Refactor switch-tables code to support other architectures Raphael Gault
2019-08-22 20:04   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 09/18] gcc-plugins: objtool: Add plugin to detect switch table on arm64 Raphael Gault
2019-08-22 20:05   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 10/18] objtool: arm64: Implement functions to add switch tables alternatives Raphael Gault
2019-08-23 16:35   ` Julien
2019-08-16 12:23 ` [RFC v4 11/18] arm64: alternative: Mark .altinstr_replacement as containing executable instructions Raphael Gault
2019-08-16 12:23 ` Raphael Gault [this message]
2019-08-22 20:10   ` [RFC v4 12/18] arm64: assembler: Add macro to annotate asm function having non standard stack-frame Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 13/18] arm64: sleep: Prevent stack frame warnings from objtool Raphael Gault
2019-08-22 20:16   ` Josh Poimboeuf
2019-08-16 12:23 ` [RFC v4 14/18] arm64: kvm: Annotate non-standard stack frame functions Raphael Gault
2019-08-16 12:24 ` [RFC v4 15/18] arm64: kernel: Add exception on kuser32 to prevent stack analysis Raphael Gault
2019-08-16 12:24 ` [RFC v4 16/18] arm64: crypto: Add exceptions for crypto object " Raphael Gault
2019-08-22 20:19   ` Josh Poimboeuf
2019-08-16 12:24 ` [RFC v4 17/18] arm64: kernel: Annotate non-standard stack frame functions Raphael Gault
2019-08-16 12:24 ` [RFC v4 18/18] objtool: arm64: Enable stack validation for arm64 Raphael Gault
2019-08-22 19:56 ` [RFC v4 00/18] objtool: Add support " Josh Poimboeuf
2019-08-23 12:00   ` Raphael Gault
2019-10-14  8:37 ` Julien Thierry
2019-10-14 13:27   ` Raphaël Gault

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