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Subject[PATCH 0/6] Support ftrace on NDS32 architecture
This patch set implements the ftrace function and function graph tracer
on NDS32 architecture. We try to use C code to do everything, so we don't
need to separate the implementation to assembly code and C code, we just
need one ftrace.c file.

In mcount function, we use the prologue/epilogue which generated by compiler
to help us to save/restore the status. On the other hand, we use naked
attribute of gcc to avoid to generate the prologue/epilogue when we don't
need it(such as ftrace_stub and return_to_handler).

We pass the following tests:


2. tools/testing/selftests/ftrace/:
# of passed: 28
# of failed: 1
# of unresolved: 0
# of untested: 0
# of unsupported: 38
# of xfailed: 0
# of undefined(test bug): 0

The failed case is
When setting the '*aw*lock' to the set_ftrace_filter in this test case,
we got the error because we have no these functions such as _raw_spin_lock,
_raw_spin_trylock and so on in our kernel.

Zong Li (6):
nds32/ftrace: Support static function tracer
nds32/ftrace: Support static function graph tracer
nds32/ftrace: Add RECORD_MCOUNT support
nds32/ftrace: Support dynamic function tracer
nds32/ftrace: Support dynamic function graph tracer
nds32/stack: Get real return address by using ftrace_graph_ret_addr

arch/nds32/Kconfig | 4 +
arch/nds32/Makefile | 4 +
arch/nds32/include/asm/ftrace.h | 46 +++++++
arch/nds32/kernel/Makefile | 6 +
arch/nds32/kernel/ftrace.c | 297 ++++++++++++++++++++++++++++++++++++++++
arch/nds32/kernel/stacktrace.c | 4 +
arch/nds32/kernel/traps.c | 30 +---
scripts/ | 3 +
8 files changed, 370 insertions(+), 24 deletions(-)
create mode 100644 arch/nds32/include/asm/ftrace.h
create mode 100644 arch/nds32/kernel/ftrace.c


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