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| author | Alan Kao <nonerkao@gmail.com> | 2017-12-18 10:52:48 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-31 04:10:54 +0100 |
| commit | 10626c32e3827bca560217966f5bd586c4e91584 (patch) | |
| tree | db45aeec301859aa5885fba76298b9c272d5443e /arch/riscv/kernel/Makefile | |
| parent | RISC-V: Remove mem_end command line processing (diff) | |
| download | linux-10626c32e3827bca560217966f5bd586c4e91584.tar.xz linux-10626c32e3827bca560217966f5bd586c4e91584.zip | |
riscv/ftrace: Add basic support
This patch contains basic ftrace support for RV64I platform.
Specifically, function tracer (HAVE_FUNCTION_TRACER), function graph
tracer (HAVE_FUNCTION_GRAPH_TRACER), and a frame pointer test
(HAVE_FUNCTION_GRAPH_FP_TEST) are implemented following the
instructions in Documentation/trace/ftrace-design.txt.
Note that the functions in both ftrace.c and setup.c should not be
hooked with the compiler's -pg option: to prevent infinite self-
referencing for the former, and to ignore early setup stuff for the
latter.
Signed-off-by: Alan Kao <alankao@andestech.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv/kernel/Makefile')
| -rw-r--r-- | arch/riscv/kernel/Makefile | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile index ab8baf7bd142..196f62ffc428 100644 --- a/arch/riscv/kernel/Makefile +++ b/arch/riscv/kernel/Makefile @@ -2,6 +2,11 @@ # Makefile for the RISC-V Linux kernel # +ifdef CONFIG_FTRACE +CFLAGS_REMOVE_ftrace.o = -pg +CFLAGS_REMOVE_setup.o = -pg +endif + extra-y += head.o extra-y += vmlinux.lds @@ -29,5 +34,7 @@ CFLAGS_setup.o := -mcmodel=medany obj-$(CONFIG_SMP) += smpboot.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_MODULES) += module.o +obj-$(CONFIG_FUNCTION_TRACER) += mcount.o +obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o clean: |