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
|
/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* 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. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
#include <sys/errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <oemu/cpu.h>
static struct oemu_cpu core_0;
struct sysmem g_mem;
static void
help(void)
{
printf(
"OSMORA OSMX64 Emulator\n"
"usage: oemu <binary file>\n"
);
}
/*
* Allocate and initialize platform
* memory.
*/
static int
mem_init(void)
{
printf("allocating 0x%x bytes of memory\n", MEMORY_SIZE);
g_mem.mem_size = MEMORY_SIZE;
g_mem.mem = malloc(MEMORY_SIZE);
if (g_mem.mem == NULL) {
printf("failed to allocate memory\n");
return -1;
}
}
/*
* Load a program specified by a path into
* memory for execution.
*/
static int
program_load(const char *path, paddr_t loadoff)
{
void *mem = g_mem.mem;
size_t size;
int fd;
fd = open(path, O_RDONLY);
if (fd < 0) {
printf("failed to open \"%s\"\n", path);
return -ENOENT;
}
/* Grab the size of the file */
size = lseek(fd, 0, SEEK_END);
lseek(fd, loadoff, SEEK_SET);
printf("loading size %d\n", size);
/* Is it too big? */
if (size >= g_mem.mem_size) {
printf("program too big !! (memsize=%x)\n", g_mem.mem_size);
close(fd);
return -1;
}
printf("read data into %p\n", mem);
printf("read %d bytes\n", read(fd, mem, size));
close(fd);
return 0;
}
int
main(int argc, char **argv)
{
if (argc < 2) {
help();
return -1;
}
/* Initialize memory */
if (mem_init() < 0) {
return -1;
}
/* Put the CPU in a known state */
cpu_reset(&core_0);
/*
* Load the program and send the little guy off
* to start nomming those 32-bit instructions
*/
if (program_load(argv[1], 0x00000000) < 0) {
return -1;
}
cpu_kick(&core_0, &g_mem);
free(g_mem.mem);
return 0;
}
|
