[kvm-unit-tests PATCH 2/5] powerpc: add test to check invalid instruction trap

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Signed-off-by: Laurent Vivier <lvivier@xxxxxxxxxx>
---
 powerpc/Makefile.common |  5 ++++-
 powerpc/emulator.c      | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 powerpc/unittests.cfg   |  3 +++
 3 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 powerpc/emulator.c

diff --git a/powerpc/Makefile.common b/powerpc/Makefile.common
index ab2caf6..257e3fb 100644
--- a/powerpc/Makefile.common
+++ b/powerpc/Makefile.common
@@ -7,7 +7,8 @@
 tests-common = \
 	$(TEST_DIR)/selftest.elf \
 	$(TEST_DIR)/spapr_hcall.elf \
-	$(TEST_DIR)/rtas.elf
+	$(TEST_DIR)/rtas.elf \
+	$(TEST_DIR)/emulator.elf
 
 all: $(TEST_DIR)/boot_rom.bin test_cases
 
@@ -70,3 +71,5 @@ $(TEST_DIR)/selftest.elf: $(cstart.o) $(reloc.o) $(TEST_DIR)/selftest.o
 $(TEST_DIR)/spapr_hcall.elf: $(cstart.o) $(reloc.o) $(TEST_DIR)/spapr_hcall.o
 
 $(TEST_DIR)/rtas.elf: $(cstart.o) $(reloc.o) $(TEST_DIR)/rtas.o
+
+$(TEST_DIR)/emulator.elf: $(cstart.o) $(reloc.o) $(TEST_DIR)/emulator.o
diff --git a/powerpc/emulator.c b/powerpc/emulator.c
new file mode 100644
index 0000000..1215c4f
--- /dev/null
+++ b/powerpc/emulator.c
@@ -0,0 +1,46 @@
+/*
+ * Test some powerpc instructions
+ */
+
+#include <libcflat.h>
+#include <asm/processor.h>
+
+static int volatile is_invalid;
+
+static void program_check_handler(struct pt_regs *regs, void *opaque)
+{
+	int *data = opaque;
+
+	printf("Detected invalid instruction 0x%016lx: %08x\n",
+	       regs->nip, *(uint32_t*)regs->nip);
+
+	*data = 1;
+
+	regs->nip += 4;
+}
+
+static void test_illegal(void)
+{
+	report_prefix_push("invalid");
+
+	is_invalid = 0;
+
+	asm volatile (".long 0");
+
+	report("exception", is_invalid);
+
+	report_prefix_pop();
+}
+
+int main(void)
+{
+	handle_exception(0x700, program_check_handler, (void *)&is_invalid);
+
+	report_prefix_push("emulator");
+
+	test_illegal();
+
+	report_prefix_pop();
+
+	return report_summary();
+}
diff --git a/powerpc/unittests.cfg b/powerpc/unittests.cfg
index 02b21c7..ed4fdbe 100644
--- a/powerpc/unittests.cfg
+++ b/powerpc/unittests.cfg
@@ -47,3 +47,6 @@ file = rtas.elf
 extra_params = -append "set-time-of-day"
 timeout = 5
 groups = rtas
+
+[emulator]
+file = emulator.elf
-- 
2.5.0

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