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* Re: [PATCH] csky: Fixup calltrace panic
@ 2020-05-17 17:52 Guenter Roeck
  2020-05-20  7:50 ` Guo Ren
  0 siblings, 1 reply; 5+ messages in thread
From: Guenter Roeck @ 2020-05-17 17:52 UTC (permalink / raw)
  To: Guo Ren; +Cc: linux-csky, linux-kernel

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@linux.alibaba.com>

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

^ permalink raw reply	[flat|nested] 5+ messages in thread

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-- links below jump to the message on this page --
2020-05-17 17:52 [PATCH] csky: Fixup calltrace panic Guenter Roeck
2020-05-20  7:50 ` Guo Ren
2020-05-21 14:46   ` Guenter Roeck
2020-05-22 15:28     ` Guo Ren
2020-05-22 21:28       ` Guenter Roeck

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