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@@ -0,0 +1,73 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Test setjmp(), longjmp()
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+ *
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+ * Copyright (c) 2021, Heinrich Schuchardt <xypron.glpk@gmx.de>
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+ */
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+
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+#include <common.h>
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+#include <test/lib.h>
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+#include <test/test.h>
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+#include <test/ut.h>
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+#include <asm/setjmp.h>
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+
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+struct test_jmp_buf {
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+ jmp_buf env;
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+ int val;
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+};
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+
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+/**
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+ * test_longjmp() - test longjmp function
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+ *
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+ * @i is passed to longjmp.
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+ * @i << 8 is set in the environment structure.
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+ *
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+ * @env: environment
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+ * @i: value passed to longjmp()
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+ */
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+static noinline void test_longjmp(struct test_jmp_buf *env, int i)
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+{
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+ env->val = i << 8;
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+ longjmp(env->env, i);
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+}
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+
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+/**
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+ * test_setjmp() - test setjmp function
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+ *
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+ * setjmp() will return the value @i passed to longjmp() if @i is non-zero.
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+ * For @i == 0 we expect return value 1.
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+ *
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+ * @i << 8 will be set by test_longjmp in the environment structure.
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+ * This value can be used to check that the stack frame is restored.
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+ *
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+ * We return the XORed values to allow simply check both at once.
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+ *
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+ * @i: value passed to longjmp()
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+ * Return: values return by longjmp()
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+ */
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+static int test_setjmp(int i)
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+{
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+ struct test_jmp_buf env;
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+ int ret;
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+
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+ env.val = -1;
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+ ret = setjmp(env.env);
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+ if (ret)
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+ return ret ^ env.val;
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+ test_longjmp(&env, i);
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+ /* We should not arrive here */
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+ return 0x1000;
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+}
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+
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+static int lib_test_longjmp(struct unit_test_state *uts)
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+{
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+ int i;
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+
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+ for (i = -3; i < 0; ++i)
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+ ut_asserteq(i ^ (i << 8), test_setjmp(i));
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+ ut_asserteq(1, test_setjmp(0));
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+ for (i = 1; i < 4; ++i)
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+ ut_asserteq(i ^ (i << 8), test_setjmp(i));
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+ return 0;
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+}
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+LIB_TEST(lib_test_longjmp, 0);
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