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Subject[PATCH 2/2] Enable gcov support on the ARM architecture
Date
From: Vincent Sanders <vince@collabora.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@collabora.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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