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authorMichael Ellerman <mpe@ellerman.id.au>2018-11-12 13:46:06 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2018-11-12 14:47:54 +1100
commit2c7645b0f7d1014f2636393de7906c6bfd25939f (patch)
tree4ac37971e808e324b428551a9836bf5934bbad29 /tools/testing/selftests/powerpc
parentpowerpc/io: Fix the IO workarounds code to work with Radix (diff)
downloadlinux-dev-2c7645b0f7d1014f2636393de7906c6bfd25939f.tar.xz
linux-dev-2c7645b0f7d1014f2636393de7906c6bfd25939f.zip
selftests/powerpc: Fix wild_bctr test to work on ppc64
The selftest I recently added to test branching to an out-of-bounds NIP doesn't work on 64-bit big endian. It does fail but not in the right way. That is it SEGVs trying to load from the opd at BAD_NIP, but it never gets as far as branching to BAD_NIP. To fix it we need to create an opd which is reachable but which holds the bad address. Fixes: b7683fc66eba ("selftests/powerpc: Add a test of wild bctr") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/testing/selftests/powerpc')
-rw-r--r--tools/testing/selftests/powerpc/mm/wild_bctr.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/mm/wild_bctr.c b/tools/testing/selftests/powerpc/mm/wild_bctr.c
index 1b0e9e9a2ddc..90469a9e49d4 100644
--- a/tools/testing/selftests/powerpc/mm/wild_bctr.c
+++ b/tools/testing/selftests/powerpc/mm/wild_bctr.c
@@ -105,6 +105,20 @@ static void dump_regs(void)
}
}
+#ifdef _CALL_AIXDESC
+struct opd {
+ unsigned long ip;
+ unsigned long toc;
+ unsigned long env;
+};
+static struct opd bad_opd = {
+ .ip = BAD_NIP,
+};
+#define BAD_FUNC (&bad_opd)
+#else
+#define BAD_FUNC BAD_NIP
+#endif
+
int test_wild_bctr(void)
{
int (*func_ptr)(void);
@@ -133,7 +147,7 @@ int test_wild_bctr(void)
poison_regs();
- func_ptr = (int (*)(void))BAD_NIP;
+ func_ptr = (int (*)(void))BAD_FUNC;
func_ptr();
FAIL_IF(1); /* we didn't segv? */