CVS commit: src/sys/arch/sh3/sh3

["Ryo Shimizu" <ryo%netbsd.org@localhost>]

Module Name:    src
Committed By:   ryo
Date:           Thu May  9 16:48:31 UTC 2019

Modified Files:
        src/sys/arch/sh3/sh3: db_trace.c

Log Message:
fix backtrace. it was broken.
- use db_read_bytes() to avoid faults.
- quite a few functions do not use frame pointers,
  therefore always detect stack depth without a frame pointer.
  however, since the framepointer(=r14) is used as a trapframe,
  the code to detect the frame pointer is still needed.
- dump the contents of trapframe during backtracing.
- KNF


To generate a diff of this commit:
cvs rdiff -u -r1.25 -r1.26 src/sys/arch/sh3/sh3/db_trace.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.