Clang on s390x compains:
/home/thuth/devel/kvm-unit-tests/s390x/selftest.c:39:15: error:
%r0 used in an address
asm volatile(" stg %0,0(%0)\n" : : "r"(-1L));
^
<inline asm>:1:13: note: instantiated into assembly here
stg %r0,0(%r0)
^
Right it is. We should not use address register 0 for STG.
Thus let's use the "a" constraint to avoid register 0 here.
Message-Id: <20200924111746.131633-1-thuth@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>
---
s390x/selftest.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/s390x/selftest.c b/s390x/selftest.c
index 4c16646..eaf5b18 100644
--- a/s390x/selftest.c
+++ b/s390x/selftest.c
@@ -36,7 +36,7 @@ static void test_pgm_int(void)
check_pgm_int_code(PGM_INT_CODE_OPERATION);
expect_pgm_int();
- asm volatile(" stg %0,0(%0)\n" : : "r"(-1L));
+ asm volatile(" stg %0,0(%0)\n" : : "a"(-1L));
check_pgm_int_code(PGM_INT_CODE_ADDRESSING);
}
--
2.18.2
