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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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| 2952 | svoboda | 40 | |
| 2965 | svoboda | 41 | #include <rtld.h> |
| 2968 | svoboda | 42 | #include <dynamic.h> |
| 2969 | svoboda | 43 | #include <pcb.h> |
| 44 | #include <elf_load.h> |
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| 2973 | svoboda | 45 | #include <arch.h> |
| 2959 | svoboda | 46 | |
| 2980 | svoboda | 47 | runtime_env_t runtime_env; |
| 48 | |||
| 2933 | svoboda | 49 | void _rtld_main(void) |
| 50 | { |
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| 2959 | svoboda | 51 | pcb_t *pcb; |
| 2969 | svoboda | 52 | elf_info_t lib_info; |
| 2973 | svoboda | 53 | static module_t prog; |
| 2978 | svoboda | 54 | static module_t lib; |
| 2981 | svoboda | 55 | module_t *rtld; |
| 2969 | svoboda | 56 | int rc; |
| 2933 | svoboda | 57 | |
| 2959 | svoboda | 58 | printf("Hello, world! (from rtld)\n"); |
| 59 | getchar(); |
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| 2933 | svoboda | 60 | |
| 2981 | svoboda | 61 | /* rtld_dynamic and rtld->bias were filled out by the bootstrap code */ |
| 62 | rtld = &runtime_env.rtld; |
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| 63 | dynamic_parse(runtime_env.rtld_dynamic, rtld->bias, &rtld->dyn); |
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| 64 | |||
| 2969 | svoboda | 65 | printf("Parse .dynamic section\n"); |
| 2959 | svoboda | 66 | pcb = (pcb_t *)PCB_ADDRESS; |
| 2973 | svoboda | 67 | dynamic_parse(pcb->dynamic, 0, &prog.dyn); |
| 2978 | svoboda | 68 | prog.bias = 0; |
| 2980 | svoboda | 69 | prog.dyn.soname = "[program]"; |
| 2969 | svoboda | 70 | |
| 2973 | svoboda | 71 | printf("Program requested library '%s'\n", prog.dyn.needed); |
| 2969 | svoboda | 72 | |
| 2972 | svoboda | 73 | rc = elf_load_file("/libtest.so.0", 0x20000, &lib_info); |
| 2969 | svoboda | 74 | if (rc < 0) { |
| 75 | printf("failed to load library\n"); |
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| 76 | return; |
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| 77 | } |
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| 78 | |||
| 2978 | svoboda | 79 | dynamic_parse(lib_info.dynamic, 0x20000, &lib.dyn); |
| 80 | lib.bias = 0x20000; |
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| 2980 | svoboda | 81 | printf("lib.bias=0x%x\n", lib.bias); |
| 2978 | svoboda | 82 | |
| 2980 | svoboda | 83 | runtime_env.program = &prog; |
| 84 | runtime_env.libc = &lib; |
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| 85 | |||
| 2973 | svoboda | 86 | /* Parse program's relocation tables */ |
| 2981 | svoboda | 87 | printf("Resolve references in program\n"); |
| 2980 | svoboda | 88 | rel_table_process(&prog, prog.dyn.rel, prog.dyn.rel_sz); |
| 89 | rel_table_process(&prog, prog.dyn.jmp_rel, prog.dyn.plt_rel_sz); |
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| 2973 | svoboda | 90 | |
| 2981 | svoboda | 91 | /* Parse lib's relocation tables */ |
| 92 | printf("Resolve references in library\n"); |
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| 93 | rel_table_process(&lib, lib.dyn.rel, lib.dyn.rel_sz); |
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| 94 | rel_table_process(&lib, lib.dyn.jmp_rel, lib.dyn.plt_rel_sz); |
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| 95 | |||
| 2980 | svoboda | 96 | printf("lib.bias=0x%x\n", lib.bias); |
| 97 | |||
| 2969 | svoboda | 98 | printf("Run program..\n"); |
| 2959 | svoboda | 99 | pcb->entry(); |
| 2933 | svoboda | 100 | } |
| 101 | |||
| 102 | /** @} |
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| 103 | */ |