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2928 | 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 loader |
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30 | * @brief Loads and runs programs from VFS. |
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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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3004 | svoboda | 38 | #include <stdlib.h> |
2928 | svoboda | 39 | #include <unistd.h> |
40 | #include <fcntl.h> |
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41 | #include <sys/types.h> |
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3004 | svoboda | 42 | #include <ipc/ipc.h> |
43 | #include <errno.h> |
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2959 | svoboda | 44 | #include <as.h> |
2928 | svoboda | 45 | |
2969 | svoboda | 46 | #include <elf.h> |
47 | #include <elf_load.h> |
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2989 | svoboda | 48 | #include <pcb.h> |
2928 | svoboda | 49 | |
2972 | svoboda | 50 | #define RTLD_BIAS 0x80000 |
51 | |||
3004 | svoboda | 52 | static char *pathname = NULL; |
53 | |||
54 | void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request) |
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2928 | svoboda | 55 | { |
3004 | svoboda | 56 | // ipc_callid_t callid; |
57 | size_t len; |
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58 | char *name_buf; |
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59 | |||
60 | /* printf("iloader_set_pathname\n"); |
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61 | if (!ipc_data_write_receive(&callid, &len)) { |
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62 | ipc_answer_0(callid, EINVAL); |
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63 | ipc_answer_0(rid, EINVAL); |
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64 | return; |
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65 | } |
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66 | */ |
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67 | len = IPC_GET_ARG2(*request); |
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68 | printf("alloc %d bytes\n", len+1); |
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69 | |||
70 | name_buf = malloc(len + 1); |
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71 | if (!name_buf) { |
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72 | // ipc_answer_0(callid, ENOMEM); |
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73 | ipc_answer_0(rid, ENOMEM); |
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74 | return; |
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75 | } |
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76 | |||
77 | printf("write_finalize\n"); |
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78 | ipc_data_write_finalize(rid, name_buf, len); |
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79 | // ipc_answer_0(rid, EOK); |
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80 | |||
81 | if (pathname != NULL) { |
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82 | free(pathname); |
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83 | pathname = NULL; |
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84 | } |
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85 | |||
86 | pathname = name_buf; |
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87 | } |
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88 | |||
89 | int iloader_run(ipc_callid_t rid, ipc_call_t *request) |
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90 | { |
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91 | int rc; |
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92 | pcb_t *pcb; |
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93 | |||
2964 | svoboda | 94 | elf_info_t prog_info; |
95 | elf_info_t interp_info; |
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2928 | svoboda | 96 | |
3004 | svoboda | 97 | printf("Load program '%s'\n", pathname); |
2928 | svoboda | 98 | |
3004 | svoboda | 99 | rc = elf_load_file(pathname, 0, &prog_info); |
2928 | svoboda | 100 | if (rc < 0) { |
101 | printf("failed to load program\n"); |
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102 | return 1; |
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103 | } |
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104 | |||
2959 | svoboda | 105 | printf("Create PCB\n"); |
2964 | svoboda | 106 | if (elf_create_pcb(&prog_info) < 0) return 1; |
2928 | svoboda | 107 | |
3004 | svoboda | 108 | if (prog_info.interp == NULL) { |
109 | /* Statically linked program */ |
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110 | printf("Run statically linked program\n"); |
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111 | elf_run(&prog_info); |
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112 | return 0; |
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113 | } |
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2988 | svoboda | 114 | |
3004 | svoboda | 115 | printf("Load dynamic linker '%s'\n", prog_info.interp); |
116 | rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info); |
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2959 | svoboda | 117 | if (rc < 0) { |
118 | printf("failed to load dynamic linker\n"); |
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119 | return 1; |
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120 | } |
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121 | |||
2989 | svoboda | 122 | /* |
3004 | svoboda | 123 | * Provide dynamic linker with some useful data |
2989 | svoboda | 124 | */ |
125 | pcb = (pcb_t *)PCB_ADDRESS; |
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126 | pcb->rtld_dynamic = interp_info.dynamic; |
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127 | pcb->rtld_bias = RTLD_BIAS; |
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128 | |||
2959 | svoboda | 129 | printf("run dynamic linker\n"); |
2964 | svoboda | 130 | elf_run(&interp_info); |
2989 | svoboda | 131 | |
3004 | svoboda | 132 | return 0; |
133 | } |
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134 | |||
135 | int main(int argc, char *argv[]) |
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136 | { |
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137 | ipc_callid_t callid; |
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138 | ipc_call_t call; |
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139 | int retval; |
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140 | int len; |
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141 | |||
142 | while (1) { |
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143 | callid = ipc_wait_for_call(&call); |
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144 | printf("received call, method=%d\n", IPC_GET_METHOD(call)); |
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145 | switch (IPC_GET_METHOD(call)) { |
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146 | case IPC_M_DATA_WRITE: |
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147 | iloader_set_pathname(callid, &call); |
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148 | iloader_run(callid, &call); |
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149 | exit(0); |
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150 | continue; |
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151 | default: |
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152 | retval = ENOENT; |
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153 | break; |
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154 | } |
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155 | if ((callid & IPC_CALLID_NOTIFICATION) == 0) { |
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156 | printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call)); |
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157 | ipc_answer_0(callid, EINVAL); |
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158 | } |
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159 | } |
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160 | |||
2928 | svoboda | 161 | /* not reached */ |
162 | return 0; |
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163 | } |
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164 | |||
165 | /** @} |
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166 | */ |