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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 rtld rtld |
29 | /** @addtogroup rtld rtld |
30 | * @brief |
30 | * @brief |
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 <loader/pcb.h> |
40 | #include <loader/pcb.h> |
41 | 41 | ||
42 | /* from librtld */ |
42 | /* from librtld */ |
43 | #include <rtld.h> |
43 | #include <rtld.h> |
44 | #include <dynamic.h> |
44 | #include <dynamic.h> |
45 | #include <elf_load.h> |
45 | #include <elf_load.h> |
46 | #include <module.h> |
46 | #include <module.h> |
47 | 47 | ||
48 | void program_run(void *entry, pcb_t *pcb); |
48 | void program_run(void *entry, pcb_t *pcb); |
49 | 49 | ||
- | 50 | runtime_env_t dload_re; |
|
- | 51 | ||
50 | int main(int argc, char *argv[]) |
52 | int main(int argc, char *argv[]) |
51 | { |
53 | { |
52 | static module_t prog; |
54 | static module_t prog; |
53 | 55 | ||
- | 56 | runtime_env = &dload_re; |
|
- | 57 | ||
54 | DPRINTF("Hello, world! (from dload)\n"); |
58 | DPRINTF("Hello, world! (from dload)\n"); |
55 | if (__pcb->dynamic == NULL) { |
59 | if (__pcb->dynamic == NULL) { |
56 | printf("This is the dynamic loader. It is not supposed " |
60 | printf("This is the dynamic loader. It is not supposed " |
57 | "to be executed directly.\n"); |
61 | "to be executed directly.\n"); |
58 | return -1; |
62 | return -1; |
59 | } |
63 | } |
60 | 64 | ||
61 | /* |
65 | /* |
62 | * First we need to process dynamic sections of the executable |
66 | * First we need to process dynamic sections of the executable |
63 | * program and insert it into the module graph. |
67 | * program and insert it into the module graph. |
64 | */ |
68 | */ |
65 | 69 | ||
66 | DPRINTF("Parse program .dynamic section at 0x%x\n", __pcb->dynamic); |
70 | DPRINTF("Parse program .dynamic section at 0x%x\n", __pcb->dynamic); |
67 | dynamic_parse(__pcb->dynamic, 0, &prog.dyn); |
71 | dynamic_parse(__pcb->dynamic, 0, &prog.dyn); |
68 | prog.bias = 0; |
72 | prog.bias = 0; |
69 | prog.dyn.soname = "[program]"; |
73 | prog.dyn.soname = "[program]"; |
70 | 74 | ||
71 | /* Initialize list of loaded modules */ |
75 | /* Initialize list of loaded modules */ |
72 | list_initialize(&runtime_env.modules_head); |
76 | list_initialize(&runtime_env->modules_head); |
73 | list_append(&prog.modules_link, &runtime_env.modules_head); |
77 | list_append(&prog.modules_link, &runtime_env->modules_head); |
74 | 78 | ||
75 | /* Pointer to program module. Used as root of the module graph. */ |
79 | /* Pointer to program module. Used as root of the module graph. */ |
76 | runtime_env.program = &prog; |
80 | runtime_env->program = &prog; |
77 | 81 | ||
78 | /* |
82 | /* |
79 | * Now we can continue with loading all other modules. |
83 | * Now we can continue with loading all other modules. |
80 | */ |
84 | */ |
81 | 85 | ||
82 | DPRINTF("Load all program dependencies\n"); |
86 | DPRINTF("Load all program dependencies\n"); |
83 | module_load_deps(&prog); |
87 | module_load_deps(&prog); |
84 | 88 | ||
85 | /* |
89 | /* |
86 | * Now relocate/link all modules together. |
90 | * Now relocate/link all modules together. |
87 | */ |
91 | */ |
88 | 92 | ||
89 | /* Process relocations in all modules */ |
93 | /* Process relocations in all modules */ |
90 | DPRINTF("Relocate all modules\n"); |
94 | DPRINTF("Relocate all modules\n"); |
91 | modules_process_relocs(); |
95 | modules_process_relocs(); |
92 | 96 | ||
- | 97 | /* Pass runtime evironment pointer through PCB. */ |
|
- | 98 | __pcb->rtld_runtime = (void *) runtime_env; |
|
- | 99 | ||
93 | /* |
100 | /* |
94 | * Finally, run the main program. |
101 | * Finally, run the main program. |
95 | */ |
102 | */ |
96 | DPRINTF("Run program.. (at 0x%lx)\n", (uintptr_t)__pcb->entry); |
103 | DPRINTF("Run program.. (at 0x%lx)\n", (uintptr_t)__pcb->entry); |
97 | 104 | ||
98 | #ifndef RTLD_DEBUG |
105 | #ifndef RTLD_DEBUG |
99 | close_console(); |
106 | close_console(); |
100 | #endif |
107 | #endif |
101 | program_run(__pcb->entry, __pcb); |
108 | program_run(__pcb->entry, __pcb); |
102 | 109 | ||
103 | /* not reached */ |
110 | /* not reached */ |
104 | return 0; |
111 | return 0; |
105 | } |
112 | } |
106 | 113 | ||
107 | /** @} |
114 | /** @} |
108 | */ |
115 | */ |
109 | 116 |