Rev 3689 | Rev 4347 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3681 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2008 Jiri Svoboda |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 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 |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup rtld rtld |
||
| 30 | * @brief |
||
| 31 | * @{ |
||
| 32 | */ |
||
| 33 | /** |
||
| 34 | * @file |
||
| 35 | */ |
||
| 36 | |||
| 37 | #include <stdio.h> |
||
| 38 | #include <unistd.h> |
||
| 39 | #include <fcntl.h> |
||
| 40 | #include <loader/pcb.h> |
||
| 41 | |||
| 42 | /* from librtld */ |
||
| 43 | #include <rtld.h> |
||
| 44 | #include <dynamic.h> |
||
| 45 | #include <elf_load.h> |
||
| 46 | #include <module.h> |
||
| 47 | |||
| 48 | void program_run(void *entry, pcb_t *pcb); |
||
| 49 | |||
| 3686 | svoboda | 50 | runtime_env_t dload_re; |
| 51 | |||
| 3681 | svoboda | 52 | int main(int argc, char *argv[]) |
| 53 | { |
||
| 54 | static module_t prog; |
||
| 55 | |||
| 3686 | svoboda | 56 | runtime_env = &dload_re; |
| 57 | |||
| 3681 | svoboda | 58 | DPRINTF("Hello, world! (from dload)\n"); |
| 59 | if (__pcb->dynamic == NULL) { |
||
| 60 | printf("This is the dynamic loader. It is not supposed " |
||
| 61 | "to be executed directly.\n"); |
||
| 62 | return -1; |
||
| 63 | } |
||
| 64 | |||
| 65 | /* |
||
| 66 | * First we need to process dynamic sections of the executable |
||
| 67 | * program and insert it into the module graph. |
||
| 68 | */ |
||
| 69 | |||
| 70 | DPRINTF("Parse program .dynamic section at 0x%x\n", __pcb->dynamic); |
||
| 71 | dynamic_parse(__pcb->dynamic, 0, &prog.dyn); |
||
| 72 | prog.bias = 0; |
||
| 73 | prog.dyn.soname = "[program]"; |
||
| 74 | |||
| 75 | /* Initialize list of loaded modules */ |
||
| 3686 | svoboda | 76 | list_initialize(&runtime_env->modules_head); |
| 77 | list_append(&prog.modules_link, &runtime_env->modules_head); |
||
| 3681 | svoboda | 78 | |
| 79 | /* Pointer to program module. Used as root of the module graph. */ |
||
| 3686 | svoboda | 80 | runtime_env->program = &prog; |
| 3681 | svoboda | 81 | |
| 3689 | svoboda | 82 | /* Work around non-existent memory space allocation. */ |
| 3772 | svoboda | 83 | runtime_env->next_bias = 0x1000000; |
| 3689 | svoboda | 84 | |
| 3681 | svoboda | 85 | /* |
| 86 | * Now we can continue with loading all other modules. |
||
| 87 | */ |
||
| 88 | |||
| 89 | DPRINTF("Load all program dependencies\n"); |
||
| 90 | module_load_deps(&prog); |
||
| 91 | |||
| 92 | /* |
||
| 93 | * Now relocate/link all modules together. |
||
| 94 | */ |
||
| 95 | |||
| 96 | /* Process relocations in all modules */ |
||
| 97 | DPRINTF("Relocate all modules\n"); |
||
| 3689 | svoboda | 98 | modules_process_relocs(&prog); |
| 3681 | svoboda | 99 | |
| 3686 | svoboda | 100 | /* Pass runtime evironment pointer through PCB. */ |
| 101 | __pcb->rtld_runtime = (void *) runtime_env; |
||
| 102 | |||
| 3681 | svoboda | 103 | /* |
| 104 | * Finally, run the main program. |
||
| 105 | */ |
||
| 106 | DPRINTF("Run program.. (at 0x%lx)\n", (uintptr_t)__pcb->entry); |
||
| 107 | |||
| 108 | #ifndef RTLD_DEBUG |
||
| 109 | close_console(); |
||
| 110 | #endif |
||
| 111 | program_run(__pcb->entry, __pcb); |
||
| 112 | |||
| 113 | /* not reached */ |
||
| 114 | return 0; |
||
| 115 | } |
||
| 116 | |||
| 117 | /** @} |
||
| 118 | */ |