1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * efi_selftest_miniapp_return
4  *
5  * Copyright (c) 2019 Heinrich Schuchardt
6  *
7  * This EFI application triggers an exception.
8  */
9 
10 #include <efi_api.h>
11 #include <host_arch.h>
12 
13 /*
14  * Entry point of the EFI application.
15  *
16  * @handle	handle of the loaded image
17  * @systable	system table
18  * Return:	status code
19  */
efi_main(efi_handle_t handle,struct efi_system_table * systable)20 efi_status_t EFIAPI efi_main(efi_handle_t handle,
21 			     struct efi_system_table *systable)
22 {
23 	struct efi_simple_text_output_protocol *con_out = systable->con_out;
24 
25 	con_out->output_string(con_out,
26 			       u"EFI application triggers exception.\n");
27 
28 #if defined(CONFIG_ARM)
29 	/*
30 	 * 0xe7f...f.	is undefined in ARM mode
31 	 * 0xde..	is undefined in Thumb mode
32 	 */
33 	asm volatile (".word 0xe7f7defb\n");
34 #elif defined(CONFIG_RISCV)
35 	asm volatile (".word 0xffffffff\n");
36 #elif defined(CONFIG_X86)
37 	asm volatile (".word 0xffff\n");
38 #elif defined(CONFIG_SANDBOX)
39 #if (HOST_ARCH == HOST_ARCH_ARM || HOST_ARCH == HOST_ARCH_AARCH64)
40 	asm volatile (".word 0xe7f7defb\n");
41 #elif (HOST_ARCH == HOST_ARCH_RISCV32 || HOST_ARCH == HOST_ARCH_RISCV64)
42 	asm volatile (".word 0xffffffff\n");
43 #elif (HOST_ARCH == HOST_ARCH_X86 || HOST_ARCH == HOST_ARCH_X86_64)
44 	asm volatile (".word 0xffff\n");
45 #endif
46 #endif
47 	con_out->output_string(con_out, u"Exception not triggered.\n");
48 	return EFI_ABORTED;
49 }
50