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| author | Mark Rutland <mark.rutland@arm.com> | 2018-11-15 22:42:00 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-11-30 13:29:04 +0000 |
| commit | 5c176aff5b5a7027840c37da9d48a8f9cedb08b9 (patch) | |
| tree | 10c88db9406e45311306c98077174aa713085bf3 /arch/arm64/kernel/entry-ftrace.S | |
| parent | e4fe196642678565766815d99ab98a3a32d72dd4 (diff) | |
| download | linux-5c176aff5b5a7027840c37da9d48a8f9cedb08b9.tar.bz2 | |
arm64: ftrace: enable graph FP test
The core frace code has an optional sanity check on the frame pointer
passed by ftrace_graph_caller and return_to_handler. This is cheap,
useful, and enabled unconditionally on x86, sparc, and riscv.
Let's do the same on arm64, so that we can catch any problems early.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Torsten Duwe <duwe@suse.de>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/entry-ftrace.S')
| -rw-r--r-- | arch/arm64/kernel/entry-ftrace.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S index a3045fa04bd0..bb549f71948d 100644 --- a/arch/arm64/kernel/entry-ftrace.S +++ b/arch/arm64/kernel/entry-ftrace.S @@ -207,8 +207,7 @@ ENDPROC(ftrace_graph_caller) * void return_to_handler(void) * * Run ftrace_return_to_handler() before going back to parent. - * @fp is checked against the value passed by ftrace_graph_caller() - * only when HAVE_FUNCTION_GRAPH_FP_TEST is enabled. + * @fp is checked against the value passed by ftrace_graph_caller(). */ ENTRY(return_to_handler) save_return_regs |