On 09/11/2017 04:49 AM, Thomas Richter wrote:
> On s390x the compilation of the file sas.c in directory
> tools/testing/selftests/sigaltstack fails with this error message:
>
> root@s35lp76 testing]# make selftests/sigaltstack/sas
> cc selftests/sigaltstack/sas.c -o selftests/sigaltstack/sas
> selftests/sigaltstack/sas.c: In function ‘my_usr1’:
> selftests/sigaltstack/sas.c:42:25: error: invalid register name for ‘sp’
> register unsigned long sp asm("sp");
> ^~
> <builtin>: recipe for target 'selftests/sigaltstack/sas' failed
> make: *** [selftests/sigaltstack/sas] Error 1
> [root@s35lp76 testing]#
>
> On s390x the stack pointer is register r15, the register name "sp"
> is unknown.
> Make this line platform dependend and use register r15.
>
> With this patch the compilation and test succeeds:
>
> [root@s35lp76 testing]# ./selftests/sigaltstack/sas
> TAP version 13
> ok 1 Initial sigaltstack state was SS_DISABLE
> # [RUN] signal USR1
> ok 2 sigaltstack is disabled in sighandler
> # [RUN] switched to user ctx
> # [RUN] signal USR2
> # [OK] Stack preserved
> ok 3 sigaltstack is still SS_AUTODISARM after signal
> Pass 3 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0
> 1..3
> [root@s35lp76 testing]#
>
> Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxxxxxxx>
Thanks. I will apply this to linux-ksleftest fixes and will try to get
this into 4.14-rc2 or rc3.
-- Shuah
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