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| Rev | Author | Line No. | Line |
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| 2933 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2008 Jiri Svoboda |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup rtld rtld |
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| 30 | * @brief |
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| 31 | * @{ |
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| 32 | */ |
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| 33 | /** |
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| 34 | * @file |
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| 35 | */ |
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| 36 | |||
| 2952 | svoboda | 37 | #include <stdio.h> |
| 2954 | svoboda | 38 | #include <unistd.h> |
| 39 | #include <fcntl.h> |
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| 3400 | svoboda | 40 | #include <loader/pcb.h> |
| 2952 | svoboda | 41 | |
| 2965 | svoboda | 42 | #include <rtld.h> |
| 2968 | svoboda | 43 | #include <dynamic.h> |
| 2969 | svoboda | 44 | #include <elf_load.h> |
| 2999 | svoboda | 45 | #include <module.h> |
| 3400 | svoboda | 46 | #include <rtld_arch.h> |
| 2959 | svoboda | 47 | |
| 2980 | svoboda | 48 | runtime_env_t runtime_env; |
| 49 | |||
| 3400 | svoboda | 50 | void program_run(void *entry, pcb_t *pcb); |
| 51 | |||
| 2933 | svoboda | 52 | void _rtld_main(void) |
| 53 | { |
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| 2973 | svoboda | 54 | static module_t prog; |
| 2981 | svoboda | 55 | module_t *rtld; |
| 2933 | svoboda | 56 | |
| 2959 | svoboda | 57 | printf("Hello, world! (from rtld)\n"); |
| 2933 | svoboda | 58 | |
| 2999 | svoboda | 59 | /* |
| 60 | * First we need to process dynamic sections of the two modules |
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| 61 | * that have been already loaded, that is, of ourselves and of |
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| 62 | * the executable program. |
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| 63 | */ |
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| 64 | |||
| 2981 | svoboda | 65 | /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */ |
| 66 | rtld = &runtime_env.rtld; |
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| 2996 | svoboda | 67 | printf("Parse rtld .dynamic section at 0x%x\n", runtime_env.rtld_dynamic); |
| 2981 | svoboda | 68 | dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn); |
| 69 | |||
| 3400 | svoboda | 70 | printf("Parse program .dynamic section at 0x%x\n", __pcb->dynamic); |
| 71 | dynamic_parse(__pcb->dynamic, 0, &prog.dyn); |
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| 2978 | svoboda | 72 | prog.bias = 0; |
| 2980 | svoboda | 73 | prog.dyn.soname = "[program]"; |
| 2969 | svoboda | 74 | |
| 2999 | svoboda | 75 | /* Initialize list of loaded modules */ |
| 76 | list_initialize(&runtime_env.modules_head); |
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| 77 | list_append(&prog.modules_link, &runtime_env.modules_head); |
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| 78 | list_append(&rtld->modules_link, &runtime_env.modules_head); |
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| 2969 | svoboda | 79 | |
| 2999 | svoboda | 80 | /* Pointer to program module. Used as root of the dependency graph */ |
| 2980 | svoboda | 81 | runtime_env.program = &prog; |
| 82 | |||
| 2999 | svoboda | 83 | /* |
| 84 | * Now we can continue with loading all other modules. |
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| 85 | */ |
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| 2973 | svoboda | 86 | |
| 2999 | svoboda | 87 | printf("Load all program dependencies\n"); |
| 88 | module_load_deps(&prog); |
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| 2981 | svoboda | 89 | |
| 2999 | svoboda | 90 | /* |
| 91 | * Now relocate/link all modules together. |
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| 92 | */ |
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| 2980 | svoboda | 93 | |
| 2999 | svoboda | 94 | /* Process relocations in all modules */ |
| 95 | printf("Relocate all modules\n"); |
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| 96 | modules_process_relocs(); |
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| 97 | |||
| 98 | /* |
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| 99 | * Finally, run the main program. |
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| 100 | */ |
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| 3400 | svoboda | 101 | printf("Run program.. (at 0x%x)\n", (uintptr_t)__pcb->entry); |
| 102 | //__pcb->entry(); |
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| 103 | program_run(__pcb->entry, __pcb); |
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| 2933 | svoboda | 104 | } |
| 105 | |||
| 3400 | svoboda | 106 | /** Fake main to satisfy dependency from libc */ |
| 107 | int main(int argc, char *argv[]) |
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| 108 | { |
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| 109 | return 0; |
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| 110 | } |
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| 111 | |||
| 112 | typedef void (*ep2)(void *); |
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| 113 | |||
| 114 | void program_run(void *entry, pcb_t *pcb) |
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| 115 | { |
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| 116 | asm ( |
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| 117 | // "xorl %%ebx, %%ebx\n" |
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| 118 | // "movl 0(%%ebx), %%ecx\n" |
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| 119 | "mov %%eax, %%ebx\n" |
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| 120 | "jmp *%0\n" |
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| 121 | :: "m" (entry), "a" (pcb) |
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| 122 | ); |
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| 123 | } |
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| 124 | |||
| 2933 | svoboda | 125 | /** @} |
| 126 | */ |