| Message ID | 20220907154218.3879207-1-npiggin@gmail.com |
|---|---|
| State | Accepted |
| Headers | show |
| Series | external/mambo: add a poor man's ftrace command | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/github-Docker_builds_and_checks | success | Successfully ran 9 jobs. |
On Thu, Sep 08, 2022 at 01:42:18AM +1000, Nicholas Piggin wrote: >Add an ftrace command that steps instructions and prints the symbol >whenever it changes. This can be helpful for low level debugging. Handy! Applied to master.
diff --git a/external/mambo/mambo_utils.tcl b/external/mambo/mambo_utils.tcl index 96f8971a..6d1425a0 100644 --- a/external/mambo/mambo_utils.tcl +++ b/external/mambo/mambo_utils.tcl @@ -169,6 +169,32 @@ proc s { {nr 1} } { } } +proc ftrace { {nr 1} } { + upvar #0 target_t t + upvar #0 target_c c + upvar #0 target_p p + + set pc [mysim cpu $p:$c:$t display spr pc] + set sym [lindex [split [addr2func $pc] {+}] 0] + set prev_pc $pc + + puts [ipc] + puts "$sym" + + for { set i 0 } { $i < $nr } { incr i 1 } { + set pc [mysim cpu $p:$c:$t display spr pc] + set sym2 [lindex [split [addr2func $pc] {+}] 0] + + if { $sym2 != $sym } { + puts "$sym2 \t\t(from [addr2func $prev_pc])" + set sym $sym2 + } + set prev_pc $pc + + mysim step 1 + } +} + proc S { {nr 1} } { upvar #0 target_t t upvar #0 target_c c
Add an ftrace command that steps instructions and prints the symbol whenever it changes. This can be helpful for low level debugging. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- external/mambo/mambo_utils.tcl | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)