This patch set includes the building blocks of dynamic ftrace features for RISC-V machines.
Changes in v4: - Organize code structure according to changes in v3 - Rebase onto the riscv-linux-4.15 branch at github's riscv/riscv-linux repo. Note that this set is based on the previous ftrace patch, which provided basic support. Changes in v3: - Replace the nops at the tracer call sites into "call ftrace_stub" instructions for better understanding (1/6, 2/6 and 5/6) Changes in v2: - Fix the return value as writing to kernel text goes wrong (2/6) - Replace manual comparisons by calling memcmp (2/6) - Simplify the conditional assignment in the Makefile (1/6) Alan Kao (6): riscv/ftrace: Add RECORD_MCOUNT support riscv/ftrace: Add dynamic function tracer support riscv/ftrace: Add dynamic function graph tracer support riscv/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support riscv/ftrace: Add DYNAMIC_FTRACE_WITH_REGS support riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support arch/riscv/Kconfig | 3 + arch/riscv/Makefile | 3 + arch/riscv/include/asm/ftrace.h | 56 ++++++++++ arch/riscv/kernel/Makefile | 5 +- arch/riscv/kernel/ftrace.c | 175 ++++++++++++++++++++++++++++- arch/riscv/kernel/mcount-dyn.S | 239 ++++++++++++++++++++++++++++++++++++++++ arch/riscv/kernel/mcount.S | 22 ++-- arch/riscv/kernel/stacktrace.c | 6 + scripts/recordmcount.pl | 5 + 9 files changed, 501 insertions(+), 13 deletions(-) create mode 100644 arch/riscv/kernel/mcount-dyn.S -- 2.15.1
