The patch titled
gcov: enable GCOV_PROFILE_ALL for x86_64
has been added to the -mm tree. Its filename is
gcov-enable-gcov_profile_all-for-x86_64.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: gcov: enable GCOV_PROFILE_ALL for x86_64
From: Peter Oberparleiter <oberpar@xxxxxxxxxxxxxxxxxx>
Enable gcov profiling of the entire kernel on x86_64. Required changes
include disabling profiling for:
* arch/kernel/acpi/realmode and arch/kernel/boot/compressed:
not linked to main kernel
* arch/vdso, arch/kernel/vsyscall_64 and arch/kernel/hpet:
profiling causes segfaults during boot (incompatible context)
Signed-off-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Huang Ying <ying.huang@xxxxxxxxx>
Cc: Li Wei <W.Li@xxxxxxx>
Cc: Michael Ellerman <michaele@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Heiko Carstens <heicars2@xxxxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <mschwid2@xxxxxxxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: WANG Cong <xiyou.wangcong@xxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/boot/Makefile | 1 +
arch/x86/boot/compressed/Makefile | 1 +
arch/x86/kernel/Makefile | 2 ++
arch/x86/kernel/acpi/realmode/Makefile | 1 +
arch/x86/vdso/Makefile | 1 +
kernel/gcov/Kconfig | 2 +-
6 files changed, 7 insertions(+), 1 deletion(-)
diff -puN arch/x86/boot/Makefile~gcov-enable-gcov_profile_all-for-x86_64 arch/x86/boot/Makefile
--- a/arch/x86/boot/Makefile~gcov-enable-gcov_profile_all-for-x86_64
+++ a/arch/x86/boot/Makefile
@@ -70,6 +70,7 @@ KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os
$(call cc-option, -mpreferred-stack-boundary=2)
KBUILD_CFLAGS += $(call cc-option, -m32)
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
+GCOV_PROFILE := n
$(obj)/bzImage: asflags-y := $(SVGA_MODE)
diff -puN arch/x86/boot/compressed/Makefile~gcov-enable-gcov_profile_all-for-x86_64 arch/x86/boot/compressed/Makefile
--- a/arch/x86/boot/compressed/Makefile~gcov-enable-gcov_profile_all-for-x86_64
+++ a/arch/x86/boot/compressed/Makefile
@@ -15,6 +15,7 @@ KBUILD_CFLAGS += $(call cc-option,-ffree
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
+GCOV_PROFILE := n
LDFLAGS := -m elf_$(UTS_MACHINE)
LDFLAGS_vmlinux := -T
diff -puN arch/x86/kernel/Makefile~gcov-enable-gcov_profile_all-for-x86_64 arch/x86/kernel/Makefile
--- a/arch/x86/kernel/Makefile~gcov-enable-gcov_profile_all-for-x86_64
+++ a/arch/x86/kernel/Makefile
@@ -24,6 +24,8 @@ CFLAGS_vsyscall_64.o := $(PROFILING) -g0
CFLAGS_hpet.o := $(nostackp)
CFLAGS_tsc.o := $(nostackp)
CFLAGS_paravirt.o := $(nostackp)
+GCOV_PROFILE_vsyscall_64.o := n
+GCOV_PROFILE_hpet.o := n
obj-y := process_$(BITS).o signal.o entry_$(BITS).o
obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
diff -puN arch/x86/kernel/acpi/realmode/Makefile~gcov-enable-gcov_profile_all-for-x86_64 arch/x86/kernel/acpi/realmode/Makefile
--- a/arch/x86/kernel/acpi/realmode/Makefile~gcov-enable-gcov_profile_all-for-x86_64
+++ a/arch/x86/kernel/acpi/realmode/Makefile
@@ -42,6 +42,7 @@ KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os
$(call cc-option, -mpreferred-stack-boundary=2)
KBUILD_CFLAGS += $(call cc-option, -m32)
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
+GCOV_PROFILE := n
WAKEUP_OBJS = $(addprefix $(obj)/,$(wakeup-y))
diff -puN arch/x86/vdso/Makefile~gcov-enable-gcov_profile_all-for-x86_64 arch/x86/vdso/Makefile
--- a/arch/x86/vdso/Makefile~gcov-enable-gcov_profile_all-for-x86_64
+++ a/arch/x86/vdso/Makefile
@@ -123,6 +123,7 @@ quiet_cmd_vdso = VDSO $@
-Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)
VDSO_LDFLAGS = -fPIC -shared $(call ld-option, -Wl$(comma)--hash-style=sysv)
+GCOV_PROFILE := n
#
# Install the unstripped copy of vdso*.so listed in $(vdso-install-y).
diff -puN kernel/gcov/Kconfig~gcov-enable-gcov_profile_all-for-x86_64 kernel/gcov/Kconfig
--- a/kernel/gcov/Kconfig~gcov-enable-gcov_profile_all-for-x86_64
+++ a/kernel/gcov/Kconfig
@@ -34,7 +34,7 @@ config GCOV_KERNEL
config GCOV_PROFILE_ALL
bool "Profile entire Kernel"
depends on GCOV_KERNEL
- depends on S390 || X86_32
+ depends on S390 || X86
default n
---help---
This options activates profiling for the entire kernel.
_
Patches currently in -mm which might be from oberpar@xxxxxxxxxxxxxxxxxx are
kernel-constructor-support.patch
seq_file-add-function-to-write-binary-data.patch
gcov-add-gcov-profiling-infrastructure.patch
gcov-enable-gcov_profile_all-for-x86_64.patch
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