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: 1. FTRACE_STARTUP_TEST: PASS 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 func-filter-glob.tc. 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/recordmcount.pl | 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 -- 2.7.4
