linux-kernel - [PATCH 2/2] Enable gcov support on the ARM architecture

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Date:	Mon, 28 May 2012 19:33:38 +0100
From:	Vincent Sanders <vincent.sanders@...labora.co.uk>
To:	Russell King <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Vincent Sanders <vince@...labora.co.uk>,
	Vincent Sanders <vincent.sanders@...labora.co.uk>
Subject: [PATCH 2/2] Enable gcov support on the ARM architecture

From: Vincent Sanders <vince@...labora.co.uk>

Enable gcov support for ARM based on original patches by David
Singleton and George G. Davis

Signed-off-by: Vincent Sanders <vincent.sanders@...labora.co.uk>
---
 arch/arm/boot/bootp/Makefile      |    2 ++
 arch/arm/boot/compressed/Makefile |    2 ++
 arch/arm/include/asm/elf.h        |    1 +
 arch/arm/kernel/module.c          |    1 +
 kernel/gcov/Kconfig               |    2 +-
 5 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/bootp/Makefile b/arch/arm/boot/bootp/Makefile
index c394e30..5761f00 100644
--- a/arch/arm/boot/bootp/Makefile
+++ b/arch/arm/boot/bootp/Makefile
@@ -5,6 +5,8 @@
 # architecture-specific flags and dependencies.
 #
 
+GCOV_PROFILE	:= n
+
 LDFLAGS_bootp	:=-p --no-undefined -X \
 		 --defsym initrd_phys=$(INITRD_PHYS) \
 		 --defsym params_phys=$(PARAMS_PHYS) -T
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index bb26756..7482fcd 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -30,6 +30,8 @@ FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
 OBJS		+= string.o
 CFLAGS_string.o	:= -Os
 
+GCOV_PROFILE		:= n
+
 #
 # Architecture dependencies
 #
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index 38050b1..64afbd0 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -52,6 +52,7 @@ typedef struct user_fp elf_fpregset_t;
 #define R_ARM_ABS32		2
 #define R_ARM_CALL		28
 #define R_ARM_JUMP24		29
+#define R_ARM_TARGET1		38
 #define R_ARM_V4BX		40
 #define R_ARM_PREL31		42
 #define R_ARM_MOVW_ABS_NC	43
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 1e9be5d..b22fc22 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -89,6 +89,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 			break;
 
 		case R_ARM_ABS32:
+		case R_ARM_TARGET1:
 			*(u32 *)loc += sym->st_value;
 			break;
 
diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig
index a920281..2a02dae 100644
--- a/kernel/gcov/Kconfig
+++ b/kernel/gcov/Kconfig
@@ -35,7 +35,7 @@ config GCOV_KERNEL
 config GCOV_PROFILE_ALL
 	bool "Profile entire Kernel"
 	depends on GCOV_KERNEL
-	depends on SUPERH || S390 || X86 || (PPC && EXPERIMENTAL) || MICROBLAZE
+	depends on SUPERH || S390 || X86 || (PPC && EXPERIMENTAL) || MICROBLAZE || ARM
 	default n
 	---help---
 	This options activates profiling for the entire kernel.
-- 
1.7.10

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