Added a simple fake_sigreturn testcase which builds a ucontext_t
without the required fpsimd_context and place it onto the stack.
Expects a SIGSEGV on test PASS.
Signed-off-by: Cristian Marussi <cristian.marussi@xxxxxxx>
---
.../arm64/signal/testcases/.gitignore | 1 +
.../testcases/fake_sigreturn_missing_fpsimd.c | 44 +++++++++++++++++++
2 files changed, 45 insertions(+)
create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c
diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore
index cf2a73599818..17d1c5e73319 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_el3
mangle_pstate_ssbs_regs
fake_sigreturn_bad_magic
fake_sigreturn_bad_size_for_magic0
+fake_sigreturn_missing_fpsimd
diff --git a/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c
new file mode 100644
index 000000000000..b8dd57ce6844
--- /dev/null
+++ b/tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2019 ARM Limited */
+
+#include <stdio.h>
+#include <ucontext.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+
+static int fake_sigreturn_missing_fpsimd_run(struct tdescr *td,
+ siginfo_t *si, ucontext_t *uc)
+{
+ size_t resv_sz, offset;
+ struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
+
+ /* just to fill the ucontext_t with something real */
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ resv_sz = GET_SF_RESV_SIZE(sf);
+ head = get_header(head, FPSIMD_MAGIC, resv_sz, &offset);
+ /* just give up and timeout if still not enough space */
+ if (head && resv_sz - offset >= HDR_SZ) {
+ fprintf(stderr, "Mangling template header. Spare space:%zd\n",
+ resv_sz - offset);
+ /* Just overwrite fpsmid_context */
+ write_terminator_record(head);
+
+ ASSERT_BAD_CONTEXT(&sf.uc);
+ fake_sigreturn(&sf, sizeof(sf), 16);
+ }
+
+ return 1;
+}
+
+struct tdescr tde = {
+ .name = "FAKE_SIGRETURN_MISSING_FPSIMD",
+ .descr = "Triggers a fake sigreturn with a sigframe missing the mandatory fpsimd_context",
+ .sig_ok = SIGSEGV,
+ .timeout = 3,
+ .run = fake_sigreturn_missing_fpsimd_run,
+};
--
2.17.1
