diff options
| author | Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com> | 2016-07-08 12:35:53 -0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-07-19 15:03:22 +0100 |
| commit | fcfd708b8cf86b8c1ca6ce014d50287f61c0eb88 (patch) | |
| tree | af73c37b2b2fbbce3af32408eed8d8a0b19072b5 /arch/arm64/Kconfig | |
| parent | da6a91252ad98d49b49e83b76c1f032cdf6e5258 (diff) | |
arm64: Add kernel return probes support (kretprobes)
The pre-handler of this special 'trampoline' kprobe executes the return
probe handler functions and restores original return address in ELR_EL1.
This way the saved pt_regs still hold the original register context to be
carried back to the probed kernel function.
Signed-off-by: Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1f7d644f7f36..6af0e2e5c710 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -89,6 +89,7 @@ config ARM64 select HAVE_RCU_TABLE_FREE select HAVE_SYSCALL_TRACEPOINTS select HAVE_KPROBES + select HAVE_KRETPROBES if HAVE_KPROBES select IOMMU_DMA if IOMMU_SUPPORT select IRQ_DOMAIN select IRQ_FORCED_THREADING |