[PATCH] powerpc: Enable GCOV
From: Michael Ellerman <hidden>
Date: 2009-08-10 05:02:51
Subsystem:
gcov based kernel profiling, linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Peter Oberparleiter, Madhavan Srinivasan, Linus Torvalds
Make it possible to enable GCOV code coverage measurement on powerpc. Lightly tested on 64-bit, seems to work as expected. Signed-off-by: Michael Ellerman <redacted> --- arch/powerpc/kernel/Makefile | 7 +++++++ arch/powerpc/kernel/vdso32/Makefile | 1 + arch/powerpc/kernel/vdso64/Makefile | 2 ++ arch/powerpc/xmon/Makefile | 2 ++ kernel/gcov/Kconfig | 2 +- 5 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 035946f..720e8c3 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile@@ -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
diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
index c3d57bd..b54b816 100644
--- a/arch/powerpc/kernel/vdso32/Makefile
+++ b/arch/powerpc/kernel/vdso32/Makefile@@ -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 \
diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
index fa7f1b8..dd0c8e9 100644
--- a/arch/powerpc/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile@@ -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)
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile
index 85ab97a..faa81b6 100644
--- a/arch/powerpc/xmon/Makefile
+++ b/arch/powerpc/xmon/Makefile@@ -2,6 +2,8 @@ subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror +GCOV_PROFILE := n + ifdef CONFIG_PPC64 EXTRA_CFLAGS += -mno-minimal-toc endif
diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig
index 22e9dcf..654efd0 100644
--- a/kernel/gcov/Kconfig
+++ b/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 + depends on S390 || X86 || (PPC && EXPERIMENTAL) default n ---help--- This options activates profiling for the entire kernel.
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1.6.2.1