Messages in this thread Patch in this message | | | Date | Thu, 26 Feb 2009 14:52:34 +0100 | From | Peter Oberparleiter <> | Subject | [PATCH 4/4] gcov: enable GCOV_PROFILE_ALL for x86_64 |
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From: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
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@linux.vnet.ibm.com>
--- 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(-)
Index: linux-2.6.29-rc6/kernel/gcov/Kconfig =================================================================== --- linux-2.6.29-rc6.orig/kernel/gcov/Kconfig +++ linux-2.6.29-rc6/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. Index: linux-2.6.29-rc6/arch/x86/kernel/acpi/realmode/Makefile =================================================================== --- linux-2.6.29-rc6.orig/arch/x86/kernel/acpi/realmode/Makefile +++ linux-2.6.29-rc6/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)) Index: linux-2.6.29-rc6/arch/x86/boot/Makefile =================================================================== --- linux-2.6.29-rc6.orig/arch/x86/boot/Makefile +++ linux-2.6.29-rc6/arch/x86/boot/Makefile @@ -71,6 +71,7 @@ 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)/zImage: asflags-y := $(SVGA_MODE) $(RAMDISK) $(obj)/bzImage: ccflags-y := -D__BIG_KERNEL__ Index: linux-2.6.29-rc6/arch/x86/boot/compressed/Makefile =================================================================== --- linux-2.6.29-rc6.orig/arch/x86/boot/compressed/Makefile +++ linux-2.6.29-rc6/arch/x86/boot/compressed/Makefile @@ -14,6 +14,7 @@ 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 Index: linux-2.6.29-rc6/arch/x86/vdso/Makefile =================================================================== --- linux-2.6.29-rc6.orig/arch/x86/vdso/Makefile +++ linux-2.6.29-rc6/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). Index: linux-2.6.29-rc6/arch/x86/kernel/Makefile =================================================================== --- linux-2.6.29-rc6.orig/arch/x86/kernel/Makefile +++ linux-2.6.29-rc6/arch/x86/kernel/Makefile @@ -23,6 +23,8 @@ nostackp := $(call cc-option, -fno-stack CFLAGS_vsyscall_64.o := $(PROFILING) -g0 $(nostackp) CFLAGS_hpet.o := $(nostackp) CFLAGS_tsc.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
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