efi_selftest: test for loaded image protocol

Verify that the loaded image protocol is installed on the image handle.
Verify that the loaded image protocol points to the system table.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

lib/efi_selftest/Makefile

@@ -24,6 +24,7 @@ efi_selftest_event_groups.o \
 efi_selftest_exitbootservices.o \
 efi_selftest_fdt.o \
 efi_selftest_gop.o \
+efi_selftest_loaded_image.o \
 efi_selftest_manageprotocols.o \
 efi_selftest_rtc.o \
 efi_selftest_snp.o \

lib/efi_selftest/efi_selftest_loaded_image.c

@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * efi_selftest_loaded_image
+ *
+ * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * This unit test checks the Loaded Image Protocol.
+ */
+
+#include <efi_selftest.h>
+
+static efi_guid_t loaded_image_protocol_guid =
+	EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2,
+		 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b);
+static struct efi_boot_services *boottime;
+efi_handle_t image_handle;
+
+/*
+ * Setup unit test.
+ *
+ * @handle:	handle of the loaded image
+ * @systable:	system table
+ */
+static int setup(const efi_handle_t img_handle,
+		 const struct efi_system_table *systable)
+{
+	boottime = systable->boottime;
+	image_handle = img_handle;
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Execute unit test.
+ *
+ * Verify that the loaded image protocol is installed on the image handle.
+ * Verify that the loaded image protocol points to the system table.
+ */
+static int execute(void)
+{
+	efi_status_t ret;
+	efi_uintn_t i, protocol_buffer_count = 0;
+	efi_guid_t **protocol_buffer = NULL;
+	bool found = false;
+	struct efi_loaded_image *loaded_image_protocol;
+
+	/*
+	 * Get the GUIDs of all protocols installed on the handle.
+	 */
+	ret = boottime->protocols_per_handle(image_handle, &protocol_buffer,
+					     &protocol_buffer_count);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("ProtocolsPerHandle failed\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!protocol_buffer_count | !protocol_buffer) {
+		efi_st_error("ProtocolsPerHandle returned no protocol\n");
+		return EFI_ST_FAILURE;
+	}
+	efi_st_printf("%u protocols installed on image handle\n",
+		      (unsigned int)protocol_buffer_count);
+	for (i = 0; i < protocol_buffer_count; ++i) {
+		if (efi_st_memcmp(protocol_buffer[i],
+				  &loaded_image_protocol_guid,
+				  sizeof(efi_guid_t)))
+			found = true;
+	}
+	if (!found) {
+		efi_st_printf("LoadedImageProtocol not found\n");
+		return EFI_ST_FAILURE;
+	}
+	ret = boottime->free_pool(protocol_buffer);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("FreePool failed\n");
+		return EFI_ST_FAILURE;
+	}
+
+	/*
+	 * Open the loaded image protocol.
+	 */
+	ret = boottime->open_protocol(image_handle, &loaded_image_protocol_guid,
+				      (void **)&loaded_image_protocol, NULL,
+				      NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("OpenProtocol failed\n");
+		return EFI_ST_FAILURE;
+	}
+	if (loaded_image_protocol->revision !=
+	    EFI_LOADED_IMAGE_PROTOCOL_REVISION) {
+		efi_st_printf("Incorrect revision\n");
+		return EFI_ST_FAILURE;
+	}
+	if (!loaded_image_protocol->system_table ||
+	    loaded_image_protocol->system_table->hdr.signature !=
+	    EFI_SYSTEM_TABLE_SIGNATURE) {
+		efi_st_printf("System table reference missing\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(loadedimage) = {
+	.name = "loaded image",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = setup,
+	.execute = execute,
+};