Added a simple fake_sigreturn testcase which builds a good
ucontext_t and tries to place it onto the stack in a misaligned way.
Expects a SIGSEGV on test PASS.
Signed-off-by: Cristian Marussi <cristian.marussi@xxxxxxx>
---
.../arm64/signal/testcases/.gitignore | 1 +
.../testcases/fake_sigreturn_misaligned.c | 30 +++++++++++++++++++
2 files changed, 31 insertions(+)
create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned.c
diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore
index c2972c3f33ca..3e6b26be6727 100644
--- a/tools/testing/selftests/arm64/signal/testcases/.gitignore
+++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore
@@ -6,3 +6,4 @@ mangle_pstate_invalid_mode_el1
mangle_pstate_invalid_mode_el2
mangle_pstate_invalid_mode_el3
mangle_pstate_ssbs_regs
+fake_sigreturn_misaligned
diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned.c
new file mode 100644
index 000000000000..d551858dd9dd
--- /dev/null
+++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2019 ARM Limited */
+
+#include <ucontext.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct a_sigframe sf;
+
+static int fake_sigreturn_misaligned_run(struct tdescr *td,
+ siginfo_t *si, ucontext_t *uc)
+{
+ /* just to fill the ucontext_t with something real */
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ /* Forcing sigframe on misaligned (=!16) SP */
+ fake_sigreturn(&sf, sizeof(sf), 8);
+
+ return 1;
+}
+
+struct tdescr tde = {
+ .name = "FAKE_SIGRETURN_MISALIGNED_SP",
+ .descr = "Triggers a fake sigreturn with a misaligned sigframe on SP",
+ .sig_ok = SIGSEGV,
+ .timeout = 3,
+ .run = fake_sigreturn_misaligned_run,
+};
--
2.17.1
