efi_selftest_exception.c
2.94 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_exception
*
* Copyright (c) 2019 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* This test checks the handling of exceptions.
*
* The efi_selftest_miniapp_exception.efi application is loaded into memory
* and started.
*/
#include <efi_selftest.h>
/* Include containing the UEFI application */
#include "efi_miniapp_file_image_exception.h"
/* Block size of compressed disk image */
#define COMPRESSED_DISK_IMAGE_BLOCK_SIZE 8
/* Binary logarithm of the block size */
#define LB_BLOCK_SIZE 9
/* File device path for LoadImage() */
static struct {
struct efi_device_path dp;
u16 filename[8];
struct efi_device_path end;
} dp = {
{
DEVICE_PATH_TYPE_MEDIA_DEVICE,
DEVICE_PATH_SUB_TYPE_FILE_PATH,
sizeof(dp.dp) + sizeof(dp.filename),
},
L"bug.efi",
{
DEVICE_PATH_TYPE_END,
DEVICE_PATH_SUB_TYPE_END,
sizeof(dp.end),
}
};
static efi_handle_t image_handle;
static struct efi_boot_services *boottime;
/* One 8 byte block of the compressed disk image */
struct line {
size_t addr;
char *line;
};
/* Compressed file image */
struct compressed_file_image {
size_t length;
struct line lines[];
};
static struct compressed_file_image img = EFI_ST_DISK_IMG;
/* Decompressed file image */
static u8 *image;
/*
* Decompress the disk image.
*
* @image decompressed disk image
* @return status code
*/
static efi_status_t decompress(u8 **image)
{
u8 *buf;
size_t i;
size_t addr;
size_t len;
efi_status_t ret;
ret = boottime->allocate_pool(EFI_LOADER_DATA, img.length,
(void **)&buf);
if (ret != EFI_SUCCESS) {
efi_st_error("Out of memory\n");
return ret;
}
boottime->set_mem(buf, img.length, 0);
for (i = 0; ; ++i) {
if (!img.lines[i].line)
break;
addr = img.lines[i].addr;
len = COMPRESSED_DISK_IMAGE_BLOCK_SIZE;
if (addr + len > img.length)
len = img.length - addr;
boottime->copy_mem(buf + addr, img.lines[i].line, len);
}
*image = buf;
return ret;
}
/*
* Setup unit test.
*
* @handle: handle of the loaded image
* @systable: system table
* @return: EFI_ST_SUCCESS for success
*/
static int setup(const efi_handle_t handle,
const struct efi_system_table *systable)
{
image_handle = handle;
boottime = systable->boottime;
/* Load the application image into memory */
decompress(&image);
return EFI_ST_SUCCESS;
}
/*
* Execute unit test.
*
* Load and start the application image.
*
* @return: EFI_ST_SUCCESS for success
*/
static int execute(void)
{
efi_status_t ret;
efi_handle_t handle;
ret = boottime->load_image(false, image_handle, &dp.dp, image,
img.length, &handle);
if (ret != EFI_SUCCESS) {
efi_st_error("Failed to load image\n");
return EFI_ST_FAILURE;
}
ret = boottime->start_image(handle, NULL, NULL);
efi_st_error("Exception not triggered\n");
return EFI_ST_FAILURE;
}
EFI_UNIT_TEST(exception) = {
.name = "exception",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
.on_request = true,
};