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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-04-19 18:22:26 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-24 19:07:58 +1000 |
| commit | ead514d5fb30a0889d51c0f0e35c3e346165a955 (patch) | |
| tree | a6fb97f2cfce93e5c8ff10351cd3f4763ae1fc4e /arch/powerpc/kernel/Makefile | |
| parent | 2f59be5b970b503ca8db1cb723b155e455ebac8e (diff) | |
| download | lwn-ead514d5fb30a0889d51c0f0e35c3e346165a955.tar.gz lwn-ead514d5fb30a0889d51c0f0e35c3e346165a955.zip | |
powerpc/kprobes: Add support for KPROBES_ON_FTRACE
Allow kprobes to be placed on ftrace _mcount() call sites. This optimization
avoids the use of a trap, by riding on ftrace infrastructure.
This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on MPROFILE_KERNEL,
which is only currently enabled on powerpc64le with newer toolchains.
Based on the x86 code by Masami.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/Makefile')
| -rw-r--r-- | arch/powerpc/kernel/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 811f441a125f..3e461637b64d 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -97,6 +97,7 @@ obj-$(CONFIG_BOOTX_TEXT) += btext.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_KPROBES) += kprobes.o obj-$(CONFIG_OPTPROBES) += optprobes.o optprobes_head.o +obj-$(CONFIG_KPROBES_ON_FTRACE) += kprobes-ftrace.o obj-$(CONFIG_UPROBES) += uprobes.o obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o obj-$(CONFIG_STACKTRACE) += stacktrace.o @@ -150,6 +151,8 @@ GCOV_PROFILE_machine_kexec_32.o := n UBSAN_SANITIZE_machine_kexec_32.o := n GCOV_PROFILE_kprobes.o := n UBSAN_SANITIZE_kprobes.o := n +GCOV_PROFILE_kprobes-ftrace.o := n +UBSAN_SANITIZE_kprobes-ftrace.o := n UBSAN_SANITIZE_vdso.o := n extra-$(CONFIG_PPC_FPU) += fpu.o |