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| Rev | Author | Line No. | Line |
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| 3681 | 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 | |||
| 37 | #include <stdio.h> |
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| 38 | #include <unistd.h> |
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| 39 | #include <fcntl.h> |
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| 40 | #include <loader/pcb.h> |
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| 4691 | svoboda | 41 | #include <ipc/ipc.h> |
| 42 | #include <vfs/vfs.h> |
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| 3681 | svoboda | 43 | |
| 44 | /* from librtld */ |
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| 45 | #include <rtld.h> |
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| 46 | #include <dynamic.h> |
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| 47 | #include <elf_load.h> |
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| 48 | #include <module.h> |
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| 49 | |||
| 50 | void program_run(void *entry, pcb_t *pcb); |
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| 51 | |||
| 3686 | svoboda | 52 | runtime_env_t dload_re; |
| 53 | |||
| 3681 | svoboda | 54 | int main(int argc, char *argv[]) |
| 55 | { |
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| 56 | static module_t prog; |
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| 57 | |||
| 3686 | svoboda | 58 | runtime_env = &dload_re; |
| 59 | |||
| 3681 | svoboda | 60 | DPRINTF("Hello, world! (from dload)\n"); |
| 61 | if (__pcb->dynamic == NULL) { |
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| 62 | printf("This is the dynamic loader. It is not supposed " |
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| 63 | "to be executed directly.\n"); |
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| 64 | return -1; |
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| 65 | } |
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| 66 | |||
| 67 | /* |
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| 68 | * First we need to process dynamic sections of the executable |
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| 69 | * program and insert it into the module graph. |
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| 70 | */ |
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| 71 | |||
| 72 | DPRINTF("Parse program .dynamic section at 0x%x\n", __pcb->dynamic); |
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| 73 | dynamic_parse(__pcb->dynamic, 0, &prog.dyn); |
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| 74 | prog.bias = 0; |
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| 75 | prog.dyn.soname = "[program]"; |
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| 76 | |||
| 77 | /* Initialize list of loaded modules */ |
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| 3686 | svoboda | 78 | list_initialize(&runtime_env->modules_head); |
| 79 | list_append(&prog.modules_link, &runtime_env->modules_head); |
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| 3681 | svoboda | 80 | |
| 81 | /* Pointer to program module. Used as root of the module graph. */ |
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| 3686 | svoboda | 82 | runtime_env->program = &prog; |
| 3681 | svoboda | 83 | |
| 3689 | svoboda | 84 | /* Work around non-existent memory space allocation. */ |
| 3772 | svoboda | 85 | runtime_env->next_bias = 0x1000000; |
| 3689 | svoboda | 86 | |
| 3681 | svoboda | 87 | /* |
| 88 | * Now we can continue with loading all other modules. |
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| 89 | */ |
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| 90 | |||
| 91 | DPRINTF("Load all program dependencies\n"); |
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| 92 | module_load_deps(&prog); |
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| 93 | |||
| 94 | /* |
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| 95 | * Now relocate/link all modules together. |
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| 96 | */ |
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| 97 | |||
| 98 | /* Process relocations in all modules */ |
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| 99 | DPRINTF("Relocate all modules\n"); |
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| 3689 | svoboda | 100 | modules_process_relocs(&prog); |
| 3681 | svoboda | 101 | |
| 3686 | svoboda | 102 | /* Pass runtime evironment pointer through PCB. */ |
| 103 | __pcb->rtld_runtime = (void *) runtime_env; |
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| 104 | |||
| 3681 | svoboda | 105 | /* |
| 106 | * Finally, run the main program. |
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| 107 | */ |
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| 108 | DPRINTF("Run program.. (at 0x%lx)\n", (uintptr_t)__pcb->entry); |
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| 109 | |||
| 110 | #ifndef RTLD_DEBUG |
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| 4691 | svoboda | 111 | ipc_hangup(fphone(stdout)); |
| 3681 | svoboda | 112 | #endif |
| 113 | program_run(__pcb->entry, __pcb); |
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| 114 | |||
| 115 | /* not reached */ |
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| 116 | return 0; |
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| 117 | } |
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| 118 | |||
| 119 | /** @} |
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| 120 | */ |