Rev 2990 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 2990 | Rev 2996 | ||
|---|---|---|---|
| 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 | 40 | ||
| 41 | #include <rtld.h> |
41 | #include <rtld.h> |
| 42 | #include <dynamic.h> |
42 | #include <dynamic.h> |
| 43 | #include <pcb.h> |
43 | #include <pcb.h> |
| 44 | #include <elf_load.h> |
44 | #include <elf_load.h> |
| 45 | #include <arch.h> |
45 | #include <arch.h> |
| 46 | 46 | ||
| 47 | runtime_env_t runtime_env; |
47 | runtime_env_t runtime_env; |
| 48 | 48 | ||
| - | 49 | void module_process_relocs(module_t *m) |
|
| - | 50 | { |
|
| - | 51 | if (m->dyn.plt_rel == DT_REL) { |
|
| - | 52 | if (m->dyn.rel != NULL) |
|
| - | 53 | rel_table_process(m, m->dyn.rel, m->dyn.rel_sz); |
|
| - | 54 | /* FIXME: this seems wrong */ |
|
| - | 55 | if (m->dyn.jmp_rel != NULL) |
|
| - | 56 | rel_table_process(m, m->dyn.jmp_rel, m->dyn.plt_rel_sz); |
|
| - | 57 | } else { /* (m->dyn.plt_rel == DT_RELA) */ |
|
| - | 58 | printf("table type DT_RELA\n"); |
|
| - | 59 | if (m->dyn.rela != NULL) { |
|
| - | 60 | printf("non-empty\n"); |
|
| - | 61 | rela_table_process(m, m->dyn.rela, m->dyn.rela_sz); |
|
| - | 62 | } |
|
| - | 63 | } |
|
| - | 64 | } |
|
| - | 65 | ||
| 49 | void _rtld_main(void) |
66 | void _rtld_main(void) |
| 50 | { |
67 | { |
| 51 | pcb_t *pcb; |
68 | pcb_t *pcb; |
| 52 | elf_info_t lib_info; |
69 | elf_info_t lib_info; |
| 53 | static module_t prog; |
70 | static module_t prog; |
| 54 | static module_t lib; |
71 | static module_t lib; |
| 55 | module_t *rtld; |
72 | module_t *rtld; |
| 56 | int rc; |
73 | int rc; |
| 57 | 74 | ||
| 58 | printf("Hello, world! (from rtld)\n"); |
75 | printf("Hello, world! (from rtld)\n"); |
| 59 | getchar(); |
76 | // getchar(); |
| 60 | 77 | ||
| 61 | /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */ |
78 | /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */ |
| 62 | rtld = &runtime_env.rtld; |
79 | rtld = &runtime_env.rtld; |
| - | 80 | printf("Parse rtld .dynamic section at 0x%x\n", runtime_env.rtld_dynamic); |
|
| 63 | dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn); |
81 | dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn); |
| - | 82 | // getchar(); |
|
| 64 | 83 | ||
| 65 | printf("Parse .dynamic section\n"); |
- | |
| 66 | pcb = __pcb_get(); |
84 | pcb = __pcb_get(); |
| - | 85 | printf("Parse program .dynamic section at 0x%x\n", pcb->dynamic); |
|
| 67 | dynamic_parse(pcb->dynamic, 0, &prog.dyn); |
86 | dynamic_parse(pcb->dynamic, 0, &prog.dyn); |
| 68 | prog.bias = 0; |
87 | prog.bias = 0; |
| 69 | prog.dyn.soname = "[program]"; |
88 | prog.dyn.soname = "[program]"; |
| 70 | 89 | ||
| 71 | printf("Program requested library '%s'\n", prog.dyn.needed); |
90 | printf("Program requested library '%s'\n", prog.dyn.needed); |
| - | 91 | // getchar(); |
|
| 72 | 92 | ||
| 73 | rc = elf_load_file("/libc.so.0", 0x20000, &lib_info); |
93 | rc = elf_load_file("/libc.so.0", 0x20000, &lib_info); |
| 74 | if (rc < 0) { |
94 | if (rc < 0) { |
| 75 | printf("failed to load library\n"); |
95 | printf("failed to load library\n"); |
| 76 | return; |
96 | return; |
| 77 | } |
97 | } |
| 78 | 98 | ||
| 79 | dynamic_parse(lib_info.dynamic, 0x20000, &lib.dyn); |
99 | dynamic_parse(lib_info.dynamic, 0x20000, &lib.dyn); |
| 80 | lib.bias = 0x20000; |
100 | lib.bias = 0x20000; |
| 81 | printf("lib.bias=0x%x\n", lib.bias); |
101 | printf("lib.bias=0x%x\n", lib.bias); |
| 82 | 102 | ||
| 83 | runtime_env.program = &prog; |
103 | runtime_env.program = &prog; |
| 84 | runtime_env.libc = &lib; |
104 | runtime_env.libc = &lib; |
| 85 | 105 | ||
| 86 | /* Parse program's relocation tables */ |
106 | /* Parse program's relocation tables */ |
| 87 | printf("Resolve references in program\n"); |
107 | printf("Resolve references in program\n"); |
| 88 | if (prog.dyn.rel != NULL) |
108 | module_process_relocs(&prog); |
| 89 | rel_table_process(&prog, prog.dyn.rel, prog.dyn.rel_sz); |
- | |
| 90 | if (prog.dyn.jmp_rel != NULL) |
- | |
| 91 | rel_table_process(&prog, prog.dyn.jmp_rel, prog.dyn.plt_rel_sz); |
- | |
| 92 | 109 | ||
| 93 | /* Parse lib's relocation tables */ |
110 | /* Parse lib's relocation tables */ |
| 94 | printf("Resolve references in library\n"); |
111 | printf("Resolve references in library\n"); |
| 95 | if (lib.dyn.rel != NULL) |
- | |
| 96 | rel_table_process(&lib, lib.dyn.rel, lib.dyn.rel_sz); |
- | |
| 97 | if (lib.dyn.jmp_rel != NULL) |
112 | module_process_relocs(&lib); |
| 98 | rel_table_process(&lib, lib.dyn.jmp_rel, lib.dyn.plt_rel_sz); |
- | |
| 99 | 113 | ||
| 100 | printf("lib.bias=0x%x\n", lib.bias); |
114 | printf("lib.bias=0x%x\n", lib.bias); |
| 101 | 115 | ||
| 102 | printf("Run program..\n"); |
116 | printf("Run program.. (at 0x%x)\n", (uintptr_t)pcb->entry); |
| - | 117 | getchar(); |
|
| 103 | pcb->entry(); |
118 | pcb->entry(); |
| 104 | } |
119 | } |
| 105 | 120 | ||
| 106 | /** @} |
121 | /** @} |
| 107 | */ |
122 | */ |
| 108 | 123 | ||