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Commit 7bf99fb6 authored Jun 17, 2009 by Peter Oberparleiter Committed by Linus Torvalds Jun 18, 2009

gcov: enable GCOV_PROFILE_ALL for x86_64



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>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Li Wei <W.Li@Sun.COM>
Cc: Michael Ellerman <michaele@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 2521f2c2

arch/x86/boot/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -70,6 +70,7 @@ KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
	$(call cc-option, -mpreferred-stack-boundary=2)		$(call cc-option, -mpreferred-stack-boundary=2)
	KBUILD_CFLAGS += $(call cc-option, -m32)		KBUILD_CFLAGS += $(call cc-option, -m32)
	KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__		KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
			GCOV_PROFILE := n

	$(obj)/bzImage: asflags-y := $(SVGA_MODE)		$(obj)/bzImage: asflags-y := $(SVGA_MODE)

arch/x86/boot/compressed/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -15,6 +15,7 @@ KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
	KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)		KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)

	KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__		KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
			GCOV_PROFILE := n

	LDFLAGS := -m elf_$(UTS_MACHINE)		LDFLAGS := -m elf_$(UTS_MACHINE)
	LDFLAGS_vmlinux := -T		LDFLAGS_vmlinux := -T

arch/x86/kernel/Makefile

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -24,6 +24,8 @@ CFLAGS_vsyscall_64.o := $(PROFILING) -g0 $(nostackp)
	CFLAGS_hpet.o := $(nostackp)		CFLAGS_hpet.o := $(nostackp)
	CFLAGS_tsc.o := $(nostackp)		CFLAGS_tsc.o := $(nostackp)
	CFLAGS_paravirt.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 := process_$(BITS).o signal.o entry_$(BITS).o
	obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o		obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o

arch/x86/kernel/acpi/realmode/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -42,6 +42,7 @@ KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os -D_SETUP -D_WAKEUP -D__KERNEL__ \
	$(call cc-option, -mpreferred-stack-boundary=2)		$(call cc-option, -mpreferred-stack-boundary=2)
	KBUILD_CFLAGS += $(call cc-option, -m32)		KBUILD_CFLAGS += $(call cc-option, -m32)
	KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__		KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
			GCOV_PROFILE := n

	WAKEUP_OBJS = $(addprefix $(obj)/,$(wakeup-y))		WAKEUP_OBJS = $(addprefix $(obj)/,$(wakeup-y))

arch/x86/vdso/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -123,6 +123,7 @@ quiet_cmd_vdso = VDSO $@
	-Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)		-Wl,-T,$(filter %.lds,$^) $(filter %.o,$^)

	VDSO_LDFLAGS = -fPIC -shared $(call ld-option, -Wl$(comma)--hash-style=sysv)		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).		# Install the unstripped copy of vdso*.so listed in $(vdso-install-y).