Import of the watch repository from Pebble

tests/stubs/stubs_syscall_internal.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "kernel/pebble_tasks.h"
+#include "system/passert.h"
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+static bool s_syscall_did_fail;
+
+void stubs_syscall_init(void) {
+  s_syscall_did_fail = false;
+}
+
+NORETURN syscall_failed(void) {
+  s_syscall_did_fail = true;
+  printf("Warning: Syscall failed!\n");
+
+  // Use cl_assert_passert() if you want to catch this getting hit.
+  PBL_ASSERTN(false);
+}
+
+#define assert_syscall_failed() \
+  cl_assert_equal_b(true, s_syscall_did_fail);
+
+bool syscall_made_from_userspace(void) {
+  return true;
+}
+
+void syscall_assert_userspace_buffer(const void* buf, size_t num_bytes) {
+  if (!buf) {
+    syscall_failed();
+  }
+  // TODO: What else can we check here?
+  return;
+}
+
+void syscall_init_context() {
+}
+
+void syscall_redirect_syscall_exit(PebbleTask task, void (*func)(void)) {
+}
+
+void syscall_reset(PebbleTask task) {
+}
+
+