On Tue, 20 Feb 2018 18:45:39 PST (-0800), alan...@andestech.com wrote:
On Tue, Feb 13, 2018 at 01:13:15PM +0800, Alan Quey-Liang Kao(高魁良) wrote:
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
Sorry, my email latency is a bit long now as I'm still backed up from FOSDEM.
This looks good, it should already be in our for-next branch.