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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2011 secunet Security Networks AG
* Copyright (C) 2013 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define LIBPAYLOAD
#ifdef LIBPAYLOAD
# include <libpayload-config.h>
# if CONFIG(LP_LZMA)
# include <lzma.h>
# define CBFS_CORE_WITH_LZMA
# endif
# if CONFIG(LP_LZ4)
# include <lz4.h>
# define CBFS_CORE_WITH_LZ4
# endif
# define CBFS_MINI_BUILD
#elif defined(__SMM__)
# define CBFS_MINI_BUILD
#else
# define CBFS_CORE_WITH_LZMA
# define CBFS_CORE_WITH_LZ4
# include <lib.h>
#endif
#include <cbfs.h>
#include <string.h>
#ifdef LIBPAYLOAD
# include <stdio.h>
# define DEBUG(x...)
# define LOG(x...)
# define ERROR(x...) printf(x)
#else
# include <console/console.h>
# define ERROR(x...) printk(BIOS_ERR, "CBFS: " x)
# define LOG(x...) printk(BIOS_INFO, "CBFS: " x)
# if CONFIG_LP_DEBUG_CBFS
# define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x)
# else
# define DEBUG(x...)
# endif
#endif
#include "cbfs_core.c"
#ifndef __SMM__
static inline int tohex4(unsigned int c)
{
return (c <= 9) ? (c + '0') : (c - 10 + 'a');
}
static void tohex16(unsigned int val, char* dest)
{
dest[0] = tohex4(val>>12);
dest[1] = tohex4((val>>8) & 0xf);
dest[2] = tohex4((val>>4) & 0xf);
dest[3] = tohex4(val & 0xf);
}
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device)
{
char name[17] = "pciXXXX,XXXX.rom";
tohex16(vendor, name+3);
tohex16(device, name+8);
return cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM, NULL);
}
void * cbfs_load_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
uintptr_t entry;
uint32_t final_size;
if (stage == NULL)
return (void *) -1;
LOG("loading stage %s @ 0x%p (%d bytes), entry @ 0x%llx\n",
name,
(void*)(uintptr_t) stage->load, stage->memlen,
stage->entry);
final_size = cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
stage->len,
(void *) (uintptr_t) stage->load,
stage->memlen);
if (!final_size) {
entry = -1;
goto out;
}
memset((void *)((uintptr_t)stage->load + final_size), 0,
stage->memlen - final_size);
DEBUG("stage loaded.\n");
entry = stage->entry;
// entry = ntohll(stage->entry);
out:
free(stage);
return (void *) entry;
}
int cbfs_execute_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
if (stage == NULL)
return 1;
if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
LOG("Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
free(stage);
return 1;
}
LOG("run @ %p\n", (void *) (uintptr_t)ntohll(stage->entry));
int result = run_address((void *)(uintptr_t)ntohll(stage->entry));
free(stage);
return result;
}
void *cbfs_load_payload(struct cbfs_media *media, const char *name)
{
return (struct cbfs_payload *)cbfs_get_file_content(
media, name, CBFS_TYPE_SELF, NULL);
}
struct cbfs_file *cbfs_find(const char *name) {
struct cbfs_handle *handle = cbfs_get_handle(CBFS_DEFAULT_MEDIA, name);
struct cbfs_media *m = &handle->media;
void *ret;
if (!handle)
return NULL;
ret = m->map(m, handle->media_offset,
handle->content_offset + handle->content_size);
if (ret == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
free(handle);
return NULL;
}
free(handle);
return ret;
}
void *cbfs_find_file(const char *name, int type) {
return cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type, NULL);
}
const struct cbfs_header *get_cbfs_header(void) {
return cbfs_get_header(CBFS_DEFAULT_MEDIA);
}
/* Simple buffer */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
struct cbfs_media *media,
size_t offset, size_t count) {
void *address = buffer->buffer + buffer->allocated;
DEBUG("simple_buffer_map(offset=%zu, count=%zu): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
offset, count, buffer->allocated, buffer->size,
buffer->last_allocate);
if (buffer->allocated + count >= buffer->size)
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
if (media->read(media, address, offset, count) != count) {
ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
count, offset);
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
}
buffer->allocated += count;
buffer->last_allocate = count;
return address;
}
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
const void *address) {
// TODO Add simple buffer management so we can free more than last
// allocated one.
DEBUG("simple_buffer_unmap(address=0x%p): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
address, buffer->allocated, buffer->size,
buffer->last_allocate);
if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
address) {
buffer->allocated -= buffer->last_allocate;
buffer->last_allocate = 0;
}
return NULL;
}
/**
* run_address is passed the address of a function taking no parameters and
* jumps to it, returning the result.
* @param f the address to call as a function.
* @return value returned by the function.
*/
int run_address(void *f)
{
int (*v) (void);
v = f;
return v();
}
#endif
|
