Hi Guenter, > 在 2020年5月18日，上午1:52，Guenter Roeck <linux@xxxxxxxxxxxx> 写道： > > 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 ? > We tested it with https://github.com/c-sky/gcc (gcc-6.3) You can fast test with: wget -nc https://gitlab.com/c-sky/buildroot/-/jobs/557072746/artifacts/raw/output/images/toolchain_thead_860_compat_next_glibc_br_defconfig_8f1b5cd7d85509fbafea935ec65c48add73bba07.tar.xz mkdir -p host tar -Jxf toolchain_thead_860_compat_next_glibc_br_defconfig_8f1b5cd7d85509fbafea935ec65c48add73bba07.tar.xz -C host cd linux-xxx LD_LIBRARY_PATH=../host/lib make ARCH=csky CROSS_COMPILE=../host/bin/csky-linux- Image We will upstream -mbacktrace to gcc.org > Thanks, > Guenter
