diff options
| author |   Michael Ellerman <mpe@ellerman.id.au> | 2020-08-19 11:57:27 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-09-08 22:24:13 +1000 |
| commit | 003d6f5fd2cc3b529f3e6c529bc4bb0792930212 (patch) | |
| tree | 9b07b98965ef707ed06158b3303d53bd71541044 /tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S | |
| parent | selftests/powerpc: Don't touch VMX/VSX on older CPUs (diff) | |
| download | linux-dev-003d6f5fd2cc3b529f3e6c529bc4bb0792930212.tar.xz linux-dev-003d6f5fd2cc3b529f3e6c529bc4bb0792930212.zip | |
selftests/powerpc: Properly handle failure in switch_endian_test
On older CPUs the switch_endian() syscall doesn't work. Currently that
causes the switch_endian_test to just crash. Instead detect the
failure and properly exit with a failure message.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200819015727.1977134-9-mpe@ellerman.id.au
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S b/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S index cc4930467235..7887f78cf072 100644 --- a/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S +++ b/tools/testing/selftests/powerpc/switch_endian/switch_endian_test.S @@ -3,9 +3,13 @@ .data .balign 8 -message: +success_message: .ascii "success: switch_endian_test\n\0" + .balign 8 +failure_message: + .ascii "failure: switch_endian_test\n\0" + .section ".toc" .balign 8 pattern: @@ -64,6 +68,9 @@ FUNC_START(_start) li r0, __NR_switch_endian sc + tdi 0, 0, 0x48 // b +8 if the endian was switched + b .Lfail // exit if endian didn't switch + #include "check-reversed.S" /* Flip back, r0 already has the switch syscall number */ @@ -71,12 +78,20 @@ FUNC_START(_start) #include "check.S" + ld r4, success_message@got(%r2) + li r5, 28 // strlen(success_message) + li r14, 0 // exit status +.Lout: li r0, __NR_write li r3, 1 /* stdout */ - ld r4, message@got(%r2) - li r5, 28 /* strlen(message3) */ sc li r0, __NR_exit - li r3, 0 + mr r3, r14 sc b . + +.Lfail: + ld r4, failure_message@got(%r2) + li r5, 28 // strlen(failure_message) + li r14, 1 + b .Lout |