test_caller: introduce syscall tests

diff --git a/src/openpower/decoder/isa/test_syscall.py b/src/openpower/decoder/isa/test_syscall.py
new file mode 100644 (file)
index 0000000..cef9be6
--- /dev/null
+++ b/src/openpower/decoder/isa/test_syscall.py
@@ -0,0 +1,57 @@
+import os
+import tempfile
+import unittest
+
+from nmutil.formaltest import FHDLTestCase
+
+from openpower.decoder.isa.test_runner import run_tst
+from openpower.test.runner import TestRunnerBase
+from openpower.simulator.program import Program
+
+
+class SyscallTestCase(FHDLTestCase):
+    def run_tst_program(self, prog, initial_regs=[0] * 32):
+        simulator = run_tst(prog, initial_regs, use_syscall_emu=True)
+        simulator.gpr.dump()
+        return simulator
+
+    def test_sc_getpid(self):
+        lst = ["sc 0"]
+        initial_regs = [0] * 32
+        initial_regs[0] = 20 # getpid
+        with Program(lst, bigendian=False) as program:
+            sim = self.run_tst_program(program, initial_regs)
+            self.assertEqual(sim.gpr(3), os.getpid())
+
+    def test_sc_getuid(self):
+        lst = ["sc 0"]
+        initial_regs = [0] * 32
+        initial_regs[0] = 24 # getuid
+        with Program(lst, bigendian=False) as program:
+            sim = self.run_tst_program(program, initial_regs)
+            self.assertEqual(sim.gpr(3), os.getuid())
+
+    def test_sc_dup(self):
+        with tempfile.TemporaryFile(mode="wb+") as stream:
+            msg0 = b"hello, world!"
+            stream.write(msg0)
+            stream.seek(0)
+            fd0 = stream.fileno()
+            st0 = os.fstat(fd0)
+
+            lst = ["sc 0"]
+            initial_regs = [0] * 32
+            initial_regs[0] = 41 # dup
+            initial_regs[3] = fd0
+            with Program(lst, bigendian=False) as program:
+                sim = self.run_tst_program(program, initial_regs)
+                fd1 = int(sim.gpr(3))
+                st1 = os.fstat(fd1)
+                msg1 = os.read(fd1, 42)
+                self.assertEqual(st0, st1)
+                self.assertEqual(msg0, msg1)
+                os.close(fd1)
+
+
+if __name__ == "__main__":
+    unittest.main()