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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 | 41 | ||
41 | #include <rtld.h> |
42 | #include <rtld.h> |
42 | #include <dynamic.h> |
43 | #include <dynamic.h> |
43 | #include <pcb.h> |
- | |
44 | #include <elf_load.h> |
44 | #include <elf_load.h> |
45 | #include <module.h> |
45 | #include <module.h> |
46 | #include <arch.h> |
46 | #include <rtld_arch.h> |
47 | 47 | ||
48 | runtime_env_t runtime_env; |
48 | runtime_env_t runtime_env; |
49 | 49 | ||
- | 50 | void program_run(void *entry, pcb_t *pcb); |
|
- | 51 | ||
50 | void _rtld_main(void) |
52 | void _rtld_main(void) |
51 | { |
53 | { |
52 | pcb_t *pcb; |
- | |
53 | static module_t prog; |
54 | static module_t prog; |
54 | module_t *rtld; |
55 | module_t *rtld; |
55 | 56 | ||
56 | printf("Hello, world! (from rtld)\n"); |
57 | printf("Hello, world! (from rtld)\n"); |
57 | 58 | ||
58 | /* |
59 | /* |
59 | * First we need to process dynamic sections of the two modules |
60 | * First we need to process dynamic sections of the two modules |
60 | * that have been already loaded, that is, of ourselves and of |
61 | * that have been already loaded, that is, of ourselves and of |
61 | * the executable program. |
62 | * the executable program. |
62 | */ |
63 | */ |
63 | 64 | ||
64 | /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */ |
65 | /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */ |
65 | rtld = &runtime_env.rtld; |
66 | rtld = &runtime_env.rtld; |
66 | printf("Parse rtld .dynamic section at 0x%x\n", runtime_env.rtld_dynamic); |
67 | printf("Parse rtld .dynamic section at 0x%x\n", runtime_env.rtld_dynamic); |
67 | dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn); |
68 | dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn); |
68 | 69 | ||
69 | pcb = __pcb_get(); |
- | |
70 | printf("Parse program .dynamic section at 0x%x\n", pcb->dynamic); |
70 | printf("Parse program .dynamic section at 0x%x\n", __pcb->dynamic); |
71 | dynamic_parse(pcb->dynamic, 0, &prog.dyn); |
71 | dynamic_parse(__pcb->dynamic, 0, &prog.dyn); |
72 | prog.bias = 0; |
72 | prog.bias = 0; |
73 | prog.dyn.soname = "[program]"; |
73 | prog.dyn.soname = "[program]"; |
74 | 74 | ||
75 | /* Initialize list of loaded modules */ |
75 | /* Initialize list of loaded modules */ |
76 | list_initialize(&runtime_env.modules_head); |
76 | list_initialize(&runtime_env.modules_head); |
77 | list_append(&prog.modules_link, &runtime_env.modules_head); |
77 | list_append(&prog.modules_link, &runtime_env.modules_head); |
78 | list_append(&rtld->modules_link, &runtime_env.modules_head); |
78 | list_append(&rtld->modules_link, &runtime_env.modules_head); |
79 | 79 | ||
80 | /* Pointer to program module. Used as root of the dependency graph */ |
80 | /* Pointer to program module. Used as root of the dependency graph */ |
81 | runtime_env.program = &prog; |
81 | runtime_env.program = &prog; |
82 | 82 | ||
83 | /* |
83 | /* |
84 | * Now we can continue with loading all other modules. |
84 | * Now we can continue with loading all other modules. |
85 | */ |
85 | */ |
86 | 86 | ||
87 | printf("Load all program dependencies\n"); |
87 | printf("Load all program dependencies\n"); |
88 | module_load_deps(&prog); |
88 | module_load_deps(&prog); |
89 | 89 | ||
90 | /* |
90 | /* |
91 | * Now relocate/link all modules together. |
91 | * Now relocate/link all modules together. |
92 | */ |
92 | */ |
93 | 93 | ||
94 | /* Process relocations in all modules */ |
94 | /* Process relocations in all modules */ |
95 | printf("Relocate all modules\n"); |
95 | printf("Relocate all modules\n"); |
96 | modules_process_relocs(); |
96 | modules_process_relocs(); |
97 | 97 | ||
98 | /* |
98 | /* |
99 | * Finally, run the main program. |
99 | * Finally, run the main program. |
100 | */ |
100 | */ |
101 | printf("Run program.. (at 0x%x)\n", (uintptr_t)pcb->entry); |
101 | printf("Run program.. (at 0x%x)\n", (uintptr_t)__pcb->entry); |
102 | pcb->entry(); |
102 | //__pcb->entry(); |
- | 103 | program_run(__pcb->entry, __pcb); |
|
- | 104 | } |
|
- | 105 | ||
- | 106 | /** Fake main to satisfy dependency from libc */ |
|
- | 107 | int main(int argc, char *argv[]) |
|
- | 108 | { |
|
- | 109 | return 0; |
|
- | 110 | } |
|
- | 111 | ||
- | 112 | typedef void (*ep2)(void *); |
|
- | 113 | ||
- | 114 | void program_run(void *entry, pcb_t *pcb) |
|
- | 115 | { |
|
- | 116 | asm ( |
|
- | 117 | // "xorl %%ebx, %%ebx\n" |
|
- | 118 | // "movl 0(%%ebx), %%ecx\n" |
|
- | 119 | "mov %%eax, %%ebx\n" |
|
- | 120 | "jmp *%0\n" |
|
- | 121 | :: "m" (entry), "a" (pcb) |
|
- | 122 | ); |
|
103 | } |
123 | } |
104 | 124 | ||
105 | /** @} |
125 | /** @} |
106 | */ |
126 | */ |
107 | 127 |