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| author | Alan Kao <alankao@andestech.com> | 2018-02-13 08:13:18 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2018-04-03 05:59:12 +0300 |
| commit | bc1a4c3a842556852bb02039887d73899d513532 (patch) | |
| tree | 122084b028e4384e9acfd6fa0ebc73a435c5715c /arch/um | |
| parent | c15ac4fd60d5ffdb151bb2c7805f377fd7f90363 (diff) | |
| download | linux-bc1a4c3a842556852bb02039887d73899d513532.tar.xz | |
riscv/ftrace: Add dynamic function graph tracer support
Once the function_graph tracer is enabled, a filtered function has the
following call sequence:
* ftracer_caller ==> on/off by ftrace_make_call/ftrace_make_nop
* ftrace_graph_caller
* ftrace_graph_call ==> on/off by ftrace_en/disable_ftrace_graph_caller
* prepare_ftrace_return
Considering the following DYNAMIC_FTRACE_WITH_REGS feature, it would be
more extendable to have a ftrace_graph_caller function, instead of
calling prepare_ftrace_return directly in ftrace_caller.
Cc: Greentime Hu <greentime@andestech.com>
Signed-off-by: Alan Kao <alankao@andestech.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/um')
0 files changed, 0 insertions, 0 deletions