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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
2 | * Copyright (c) 2008 Jiri Svoboda |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup loader |
29 | /** @addtogroup loader |
30 | * @brief Loads and runs programs from VFS. |
30 | * @brief Loads and runs programs from VFS. |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <stdio.h> |
37 | #include <stdio.h> |
38 | #include <unistd.h> |
38 | #include <unistd.h> |
39 | #include <fcntl.h> |
39 | #include <fcntl.h> |
40 | #include <sys/types.h> |
40 | #include <sys/types.h> |
41 | #include <as.h> |
41 | #include <as.h> |
42 | 42 | ||
43 | #include "elf.h" |
43 | #include "elf.h" |
44 | #include "pcb.h" |
44 | #include "pcb.h" |
45 | 45 | ||
46 | unsigned int elf_load(int fd, elf_header_t *header); |
46 | unsigned int elf_load(int fd, elf_header_t *header); |
47 | 47 | ||
48 | typedef void (*entry_point_t)(void); |
48 | typedef void (*entry_point_t)(void); |
49 | 49 | ||
50 | int elf_load_file(char *file_name, elf_header_t *header) |
50 | static int elf_load_file(char *file_name, elf_header_t *header) |
51 | { |
51 | { |
52 | int fd; |
52 | int fd; |
53 | int rc; |
53 | int rc; |
54 | 54 | ||
55 | printf("open and read '%s'...\n", file_name); |
55 | printf("open and read '%s'...\n", file_name); |
56 | 56 | ||
57 | fd = open(file_name, 0); |
57 | fd = open(file_name, 0); |
58 | if (fd < 0) { |
58 | if (fd < 0) { |
59 | printf("failed opening file\n"); |
59 | printf("failed opening file\n"); |
60 | return -1; |
60 | return -1; |
61 | } |
61 | } |
62 | 62 | ||
63 | rc = elf_load(fd, header); |
63 | rc = elf_load(fd, header); |
64 | printf("elf_load() -> %d\n", rc); |
64 | printf("elf_load() -> %d\n", rc); |
65 | 65 | ||
66 | close(fd); |
66 | close(fd); |
67 | 67 | ||
68 | return rc; |
68 | return rc; |
69 | } |
69 | } |
70 | 70 | ||
71 | void elf_run(elf_header_t *header) |
71 | static void elf_run(elf_header_t *header) |
72 | { |
72 | { |
73 | entry_point_t entry_point; |
73 | entry_point_t entry_point; |
74 | 74 | ||
75 | entry_point = (entry_point_t)header->e_entry; |
75 | entry_point = (entry_point_t)header->e_entry; |
76 | (*entry_point)(); |
76 | (*entry_point)(); |
77 | 77 | ||
78 | /* not reached */ |
78 | /* not reached */ |
79 | } |
79 | } |
80 | 80 | ||
81 | void elf_create_pcb(elf_header_t *header) |
81 | static int elf_create_pcb(elf_header_t *header) |
82 | { |
82 | { |
83 | pcb_t *pcb; |
83 | pcb_t *pcb; |
84 | void *a; |
84 | void *a; |
85 | 85 | ||
86 | pcb = (pcb_t *)PCB_ADDRESS; |
86 | pcb = (pcb_t *)PCB_ADDRESS; |
87 | 87 | ||
88 | a = as_area_create(pcb, sizeof(pcb_t), AS_AREA_READ | AS_AREA_WRITE); |
88 | a = as_area_create(pcb, sizeof(pcb_t), AS_AREA_READ | AS_AREA_WRITE); |
89 | if (a == (void *)(-1)) { |
89 | if (a == (void *)(-1)) { |
90 | printf("elf_create_pcb: memory mapping failed\n"); |
90 | printf("elf_create_pcb: memory mapping failed\n"); |
91 | return EE_MEMORY; |
91 | return EE_MEMORY; |
92 | } |
92 | } |
93 | 93 | ||
94 | pcb->entry = (entry_point_t)header->e_entry; |
94 | pcb->entry = (entry_point_t)header->e_entry; |
- | 95 | ||
- | 96 | return 0; |
|
95 | } |
97 | } |
96 | 98 | ||
97 | int main(int argc, char *argv[]) |
99 | int main(int argc, char *argv[]) |
98 | { |
100 | { |
99 | elf_header_t prog_header; |
101 | elf_header_t prog_header; |
100 | elf_header_t interp_header; |
102 | elf_header_t interp_header; |
101 | char *file_name; |
103 | char *file_name; |
102 | int rc; |
104 | int rc; |
103 | 105 | ||
104 | printf("This is loader\n"); |
106 | printf("This is loader\n"); |
105 | getchar(); |
107 | getchar(); |
106 | 108 | ||
107 | printf("Load program\n"); |
109 | printf("Load program\n"); |
108 | 110 | ||
109 | rc = elf_load_file("/tetris", &prog_header); |
111 | rc = elf_load_file("/tetris", &prog_header); |
110 | if (rc < 0) { |
112 | if (rc < 0) { |
111 | printf("failed to load program\n"); |
113 | printf("failed to load program\n"); |
112 | return 1; |
114 | return 1; |
113 | } |
115 | } |
114 | 116 | ||
115 | printf("Create PCB\n"); |
117 | printf("Create PCB\n"); |
116 | elf_create_pcb(&prog_header); |
118 | if (elf_create_pcb(&prog_header) < 0) return 1; |
117 | 119 | ||
118 | printf("Load dynamic linker\n"); |
120 | printf("Load dynamic linker\n"); |
119 | file_name = "/rtld.so"; |
121 | file_name = "/rtld.so"; |
120 | printf("open and read '%s'...\n", file_name); |
122 | printf("open and read '%s'...\n", file_name); |
121 | rc = elf_load_file(file_name, &interp_header); |
123 | rc = elf_load_file(file_name, &interp_header); |
122 | if (rc < 0) { |
124 | if (rc < 0) { |
123 | printf("failed to load dynamic linker\n"); |
125 | printf("failed to load dynamic linker\n"); |
124 | return 1; |
126 | return 1; |
125 | } |
127 | } |
126 | 128 | ||
127 | printf("run dynamic linker\n"); |
129 | printf("run dynamic linker\n"); |
128 | elf_run(&interp_header); |
130 | elf_run(&interp_header); |
129 | 131 | ||
130 | /* not reached */ |
132 | /* not reached */ |
131 | return 0; |
133 | return 0; |
132 | } |
134 | } |
133 | 135 | ||
134 | /** @} |
136 | /** @} |
135 | */ |
137 | */ |
136 | 138 |