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
|
/*
*
* (c) 2004,2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#define __NO_INLINE__
#include <stdio.h>
#include <malloc.h>
#include <elf.h>
#include <string.h>
#include <macos/types.h>
#include <macos/devices.h>
#include <libstream.h>
#include "console.h"
#include "bank.h"
#include "misc.h"
#include "load.h"
#define PAGE_SHIFT 12
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define BAR_STEP 40
static int bar_read(stream_t *stream, char*buffer, int size,
int current, int total_size)
{
int read = 0;
int blksize = (total_size + BAR_STEP - 1) / BAR_STEP;
int ret;
console_cursor_restore();
printf(" %d %%", ((current + read) * 100 + total_size / 2) / total_size);
while (size)
{
if (blksize > size)
blksize = size;
ret = stream_read(stream, buffer, blksize);
read += ret;
if (ret != blksize)
break;
console_cursor_restore();
printf("#");
console_cursor_save();
printf(" %d %%", ((current + read) * 100 + total_size / 2) / total_size);
buffer += ret;
size -= ret;
}
console_cursor_restore();
printf(" %d %%", ((current + read) * 100 + total_size / 2) / total_size);
return read;
}
char* load_kernel(char* path, int bootstrap_size,
unsigned long *base, unsigned long *entry, unsigned long *size)
{
Elf32_Ehdr elf_header;
Elf32_Phdr *program_header;
int ret;
unsigned long min_addr, max_addr, kernel_size;
int i;
char *kernel;
stream_t *stream;
int read;
int to_read;
printf("Loading kernel ");
stream = stream_open(path);
if (stream == NULL)
return NULL;
stream_uncompress(stream);
ret = stream_read(stream, &elf_header, sizeof(Elf32_Ehdr));
if (ret != sizeof(Elf32_Ehdr))
error("Cannot read\n");
if (elf_header.e_machine != EM_68K)
{
printf( "Not MC680x0 architecture\n");
return NULL;
}
if (elf_header.e_type != ET_EXEC)
{
printf( "Not an executable file\n");
return NULL;
}
program_header = (Elf32_Phdr *)malloc(elf_header.e_phnum *
sizeof (Elf32_Phdr));
if (program_header == NULL)
{
printf( "Cannot allocate memory\n");
return NULL;
}
ret = stream_lseek(stream, elf_header.e_phoff, SEEK_SET);
ret = stream_read(stream, program_header, elf_header.e_phnum * sizeof(Elf32_Phdr));
min_addr = 0xffffffff;
max_addr = 0;
to_read = 0;
for (i = 0; i < elf_header.e_phnum; i++)
{
min_addr = (min_addr > program_header[i].p_vaddr) ?
program_header[i].p_vaddr : min_addr;
max_addr = (max_addr < program_header[i].p_vaddr + program_header[i].p_memsz) ?
program_header[i].p_vaddr + program_header[i].p_memsz: max_addr;
to_read += program_header[i].p_filesz;
}
if (min_addr == 0)
{
min_addr = PAGE_SIZE;
program_header[0].p_vaddr += PAGE_SIZE;
program_header[0].p_offset += PAGE_SIZE;
program_header[0].p_filesz -= PAGE_SIZE;
program_header[0].p_memsz -= PAGE_SIZE;
}
kernel_size = max_addr - min_addr;
*base = min_addr;
*entry = elf_header.e_entry;
*size = kernel_size;
kernel = (char*)malloc_contiguous(kernel_size + 4 + bootstrap_size);
kernel = (unsigned char*)(((unsigned long)kernel + 3) & 0xFFFFFFFC);
if (!check_full_in_bank((unsigned long)kernel, kernel_size))
error("Kernel between two banks, contact maintainer\n");
memset(kernel, 0, kernel_size);
read = 0;
console_cursor_save();
for (i = 0; i < elf_header.e_phnum; i++)
{
ret = stream_lseek(stream, program_header[i].p_offset, SEEK_SET);
if (ret != program_header[i].p_offset)
{
error("Cannot seek");
}
ret = bar_read( stream,
kernel + program_header[i].p_vaddr - PAGE_SIZE,
program_header[i].p_filesz,
read, to_read);
if (ret != program_header[i].p_filesz)
{
printf("Read %d instead of %d\n",
ret, program_header[i].p_filesz);
error("Cannot load");
}
read += ret;
}
putchar('\n');
ret = stream_close(stream);
return kernel;
}
char *load_ramdisk(char* path, unsigned long *ramdisk_size)
{
stream_t *stream;
char *ramdisk_start;
struct stream_stat stat;
int ret;
stream = stream_open(path);
if (stream == NULL)
return NULL;
stream_fstat(stream, &stat);
ramdisk_start = (char*)malloc_top(stat.st_size + 4);
ramdisk_start = (char*)(((unsigned long)ramdisk_start + 3) & 0xFFFFFFFC);
if (!check_full_in_bank((unsigned long)ramdisk_start, stat.st_size))
error("ramdisk between two banks, contact maintainer\n");
printf("Loading RAMDISK ");
console_cursor_save();
ret = bar_read(stream, ramdisk_start, stat.st_size, 0, stat.st_size);
putchar('\n');
if (ret != stat.st_size)
error("Cannot load");
stream_close(stream);
*ramdisk_size = stat.st_size;
return ramdisk_start;
}
|
