Hi, On Wed, May 13, 2020 at 03:15:25PM +0800, Guo Ren wrote: > The implementation of show_stack will panic with wrong fp: > > addr = *fp++; > > because the fp isn't checked properly. > > The current implementations of show_stack, wchan and stack_trace > haven't been designed properly, so just deprecate them. > > This patch is a reference to riscv's way, all codes are modified from > arm's. The patch is passed with: > > - cat /proc/<pid>/stack > - cat /proc/<pid>/wchan > - echo c > /proc/sysrq-trigger > > Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> This patch results in: gcc version: csky-linux-gcc (GCC) 9.3.0 Building csky:defconfig ... failed -------------- Error log: csky-linux-gcc: error: unrecognized command line option '-mbacktrace'; did you mean '-fbacktrace'? csky-linux-gcc: error: unrecognized command line option '-mbacktrace'; did you mean '-fbacktrace'? make[2]: *** [scripts/mod/devicetable-offsets.s] Error 1 make[2]: *** Waiting for unfinished jobs.... csky-linux-gcc: error: unrecognized command line option '-mbacktrace'; did you mean '-fbacktrace'? make[2]: *** [scripts/mod/empty.o] Error 1 make[1]: *** [prepare0] Error 2 make: *** [sub-make] Error 2 when trying to build csky images with upstream gcc 9.3.0. What version of gcc is needed to build csky images ? Also, would it be possible to support the upstream version of gcc ? Thanks, Guenter
