linux-kernel - [PATCH v5 06/10] x86/asm/efi: Fix asmvalidate warnings for efi_stub

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Date:	Wed, 10 Jun 2015 07:06:14 -0500
From:	Josh Poimboeuf <jpoimboe@...hat.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	Michal Marek <mmarek@...e.cz>,
	Peter Zijlstra <peterz@...radead.org>,
	Andy Lutomirski <luto@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>, x86@...nel.org,
	live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
	Matt Fleming <matt.fleming@...el.com>,
	linux-efi@...r.kernel.org
Subject: [PATCH v5 06/10] x86/asm/efi: Fix asmvalidate warnings for efi_stub_64.S

Fix the following asmvalidate warnings:

   asmvalidate: arch/x86/platform/efi/efi_stub_64.o: efi_call(): missing FP_SAVE/RESTORE macros
   asmvalidate: arch/x86/boot/compressed/efi_stub_64.o: efi_call(): missing FP_SAVE/RESTORE macros

efi_call() is a non-leaf callable function, so save/restore the frame
pointer with FP_SAVE/RESTORE.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Matt Fleming <matt.fleming@...el.com>
Cc: linux-efi@...r.kernel.org
---
 arch/x86/platform/efi/efi_stub_64.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S
index 86d0f9e..0ca6bfb 100644
--- a/arch/x86/platform/efi/efi_stub_64.S
+++ b/arch/x86/platform/efi/efi_stub_64.S
@@ -11,6 +11,7 @@
 #include <asm/msr.h>
 #include <asm/processor-flags.h>
 #include <asm/page_types.h>
+#include <asm/func.h>
 
 #define SAVE_XMM			\
 	mov %rsp, %rax;			\
@@ -74,6 +75,7 @@
 	.endm
 
 ENTRY(efi_call)
+	FP_SAVE
 	SAVE_XMM
 	mov (%rsp), %rax
 	mov 8(%rax), %rax
@@ -88,6 +90,7 @@ ENTRY(efi_call)
 	RESTORE_PGT
 	addq $48, %rsp
 	RESTORE_XMM
+	FP_RESTORE
 	ret
 ENDPROC(efi_call)
 
-- 
2.1.0

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