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Commit a15098c9 authored by Michael Ellerman's avatar Michael Ellerman Committed by Benjamin Herrenschmidt
Browse files

powerpc: Enable GCOV 



Make it possible to enable GCOV code coverage measurement on powerpc.

Lightly tested on 64-bit, seems to work as expected.

Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 72865650

arch/powerpc/kernel/Makefile

+7 −0
Original line number Diff line number Diff line
@@ -115,6 +115,13 @@ ifneq ($(CONFIG_XMON)$(CONFIG_KEXEC),) 
obj-y				+= ppc_save_regs.o

endif



# Disable GCOV in odd or sensitive code

GCOV_PROFILE_prom_init.o := n

GCOV_PROFILE_ftrace.o := n

GCOV_PROFILE_machine_kexec_64.o := n

GCOV_PROFILE_machine_kexec_32.o := n

GCOV_PROFILE_kprobes.o := n



extra-$(CONFIG_PPC_FPU)		+= fpu.o

extra-$(CONFIG_ALTIVEC)		+= vector.o

extra-$(CONFIG_PPC64)		+= entry_64.o

arch/powerpc/kernel/vdso32/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ endif 
targets := $(obj-vdso32) vdso32.so vdso32.so.dbg

obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))



GCOV_PROFILE := n



EXTRA_CFLAGS := -shared -fno-common -fno-builtin

EXTRA_CFLAGS += -nostdlib -Wl,-soname=linux-vdso32.so.1 \

arch/powerpc/kernel/vdso64/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o 
targets := $(obj-vdso64) vdso64.so vdso64.so.dbg

obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))



GCOV_PROFILE := n



EXTRA_CFLAGS := -shared -fno-common -fno-builtin

EXTRA_CFLAGS += -nostdlib -Wl,-soname=linux-vdso64.so.1 \

		$(call ld-option, -Wl$(comma)--hash-style=sysv)

arch/powerpc/xmon/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -2,6 +2,8 @@ 


subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror



GCOV_PROFILE := n



ifdef CONFIG_PPC64

EXTRA_CFLAGS += -mno-minimal-toc

endif

kernel/gcov/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -34,7 +34,7 @@ config GCOV_KERNEL 
config GCOV_PROFILE_ALL

	bool "Profile entire Kernel"

	depends on GCOV_KERNEL

	depends on S390 || X86

	depends on S390 || X86 || (PPC && EXPERIMENTAL)

	default n

	---help---

	This options activates profiling for the entire kernel.