Rev 3101 | Rev 3155 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2928 | 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 loader |
||
30 | * @brief Loads and runs programs from VFS. |
||
31 | * @{ |
||
32 | */ |
||
33 | /** |
||
34 | * @file |
||
3101 | svoboda | 35 | * @brief Loads and runs programs from VFS. |
36 | * |
||
37 | * The program loader is a special init binary. Its image is used |
||
38 | * to create a new task upon a @c task_spawn syscall. The syscall |
||
39 | * returns the id of a phone connected to the newly created task. |
||
40 | * |
||
41 | * The caller uses this phone to send the pathname and various other |
||
42 | * information to the loader. This is normally done by the C library |
||
43 | * and completely hidden from applications. |
||
2928 | svoboda | 44 | */ |
45 | |||
46 | #include <stdio.h> |
||
3004 | svoboda | 47 | #include <stdlib.h> |
2928 | svoboda | 48 | #include <unistd.h> |
49 | #include <fcntl.h> |
||
50 | #include <sys/types.h> |
||
3004 | svoboda | 51 | #include <ipc/ipc.h> |
3148 | svoboda | 52 | #include <ipc/loader.h> |
3004 | svoboda | 53 | #include <errno.h> |
3148 | svoboda | 54 | #include <async.h> |
2959 | svoboda | 55 | #include <as.h> |
2928 | svoboda | 56 | |
2969 | svoboda | 57 | #include <elf.h> |
58 | #include <elf_load.h> |
||
2989 | svoboda | 59 | #include <pcb.h> |
2928 | svoboda | 60 | |
3101 | svoboda | 61 | /** |
62 | * Bias used for loading the dynamic linker. This will be soon replaced |
||
63 | * by automatic placement. |
||
64 | */ |
||
2972 | svoboda | 65 | #define RTLD_BIAS 0x80000 |
66 | |||
3101 | svoboda | 67 | /** Pathname of the file that will be loaded */ |
3004 | svoboda | 68 | static char *pathname = NULL; |
69 | |||
3101 | svoboda | 70 | /** Receive a call setting pathname of the program to execute. |
71 | * |
||
72 | * @param rid |
||
73 | * @param request |
||
74 | */ |
||
3148 | svoboda | 75 | static void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request) |
2928 | svoboda | 76 | { |
3148 | svoboda | 77 | ipc_callid_t callid; |
3004 | svoboda | 78 | size_t len; |
79 | char *name_buf; |
||
80 | |||
3148 | svoboda | 81 | printf("iloader_set_pathname\n"); |
3004 | svoboda | 82 | if (!ipc_data_write_receive(&callid, &len)) { |
83 | ipc_answer_0(callid, EINVAL); |
||
84 | ipc_answer_0(rid, EINVAL); |
||
85 | return; |
||
86 | } |
||
3148 | svoboda | 87 | |
3004 | svoboda | 88 | printf("alloc %d bytes\n", len+1); |
89 | |||
90 | name_buf = malloc(len + 1); |
||
91 | if (!name_buf) { |
||
3148 | svoboda | 92 | ipc_answer_0(callid, ENOMEM); |
3004 | svoboda | 93 | ipc_answer_0(rid, ENOMEM); |
94 | return; |
||
95 | } |
||
96 | |||
97 | printf("write_finalize\n"); |
||
3148 | svoboda | 98 | ipc_data_write_finalize(callid, name_buf, len); |
99 | printf("answer\n"); |
||
100 | ipc_answer_0(rid, EOK); |
||
3004 | svoboda | 101 | |
102 | if (pathname != NULL) { |
||
103 | free(pathname); |
||
104 | pathname = NULL; |
||
105 | } |
||
106 | |||
3148 | svoboda | 107 | name_buf[len] = '\0'; |
3004 | svoboda | 108 | pathname = name_buf; |
109 | } |
||
110 | |||
3101 | svoboda | 111 | /** Load and run the previously selected program. |
112 | * |
||
113 | * @param rid |
||
114 | * @param request |
||
115 | * @return 0 on success, !0 on error. |
||
116 | */ |
||
3148 | svoboda | 117 | static int iloader_run(ipc_callid_t rid, ipc_call_t *request) |
3004 | svoboda | 118 | { |
119 | int rc; |
||
120 | pcb_t *pcb; |
||
121 | |||
2964 | svoboda | 122 | elf_info_t prog_info; |
123 | elf_info_t interp_info; |
||
2928 | svoboda | 124 | |
3004 | svoboda | 125 | printf("Load program '%s'\n", pathname); |
2928 | svoboda | 126 | |
3004 | svoboda | 127 | rc = elf_load_file(pathname, 0, &prog_info); |
2928 | svoboda | 128 | if (rc < 0) { |
129 | printf("failed to load program\n"); |
||
130 | return 1; |
||
131 | } |
||
132 | |||
2959 | svoboda | 133 | printf("Create PCB\n"); |
2964 | svoboda | 134 | if (elf_create_pcb(&prog_info) < 0) return 1; |
2928 | svoboda | 135 | |
3004 | svoboda | 136 | if (prog_info.interp == NULL) { |
137 | /* Statically linked program */ |
||
138 | printf("Run statically linked program\n"); |
||
139 | elf_run(&prog_info); |
||
140 | return 0; |
||
141 | } |
||
2988 | svoboda | 142 | |
3004 | svoboda | 143 | printf("Load dynamic linker '%s'\n", prog_info.interp); |
144 | rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info); |
||
2959 | svoboda | 145 | if (rc < 0) { |
146 | printf("failed to load dynamic linker\n"); |
||
147 | return 1; |
||
148 | } |
||
149 | |||
2989 | svoboda | 150 | /* |
3004 | svoboda | 151 | * Provide dynamic linker with some useful data |
2989 | svoboda | 152 | */ |
153 | pcb = (pcb_t *)PCB_ADDRESS; |
||
154 | pcb->rtld_dynamic = interp_info.dynamic; |
||
155 | pcb->rtld_bias = RTLD_BIAS; |
||
156 | |||
2959 | svoboda | 157 | printf("run dynamic linker\n"); |
2964 | svoboda | 158 | elf_run(&interp_info); |
2989 | svoboda | 159 | |
3004 | svoboda | 160 | return 0; |
161 | } |
||
162 | |||
3148 | svoboda | 163 | /** Handle loader connection. |
3101 | svoboda | 164 | * |
165 | * Receive and carry out commands (of which the last one should be |
||
166 | * to execute the loaded program). |
||
167 | */ |
||
3148 | svoboda | 168 | static void loader_connection(ipc_callid_t iid, ipc_call_t *icall) |
3004 | svoboda | 169 | { |
170 | ipc_callid_t callid; |
||
171 | ipc_call_t call; |
||
172 | int retval; |
||
173 | |||
3148 | svoboda | 174 | /* Ignore parameters, the connection is already open */ |
175 | (void)iid; (void)icall; |
||
176 | |||
3004 | svoboda | 177 | while (1) { |
3148 | svoboda | 178 | callid = async_get_call(&call); |
179 | printf("received call from phone %d, method=%d\n", |
||
180 | call.in_phone_hash, IPC_GET_METHOD(call)); |
||
3004 | svoboda | 181 | switch (IPC_GET_METHOD(call)) { |
3148 | svoboda | 182 | case LOADER_SET_PATHNAME: |
3004 | svoboda | 183 | iloader_set_pathname(callid, &call); |
3148 | svoboda | 184 | continue; |
185 | case LOADER_RUN: |
||
3004 | svoboda | 186 | iloader_run(callid, &call); |
187 | exit(0); |
||
188 | continue; |
||
189 | default: |
||
190 | retval = ENOENT; |
||
191 | break; |
||
192 | } |
||
193 | if ((callid & IPC_CALLID_NOTIFICATION) == 0) { |
||
194 | printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call)); |
||
195 | ipc_answer_0(callid, EINVAL); |
||
196 | } |
||
197 | } |
||
3148 | svoboda | 198 | } |
3004 | svoboda | 199 | |
3148 | svoboda | 200 | /** Program loader main function. |
201 | */ |
||
202 | int main(int argc, char *argv[]) |
||
203 | { |
||
204 | ipc_callid_t callid; |
||
205 | ipc_call_t call; |
||
206 | ipcarg_t phone_hash; |
||
207 | |||
208 | /* The first call only communicates the incoming phone hash */ |
||
209 | callid = ipc_wait_for_call(&call); |
||
210 | |||
211 | if (IPC_GET_METHOD(call) != LOADER_HELLO) { |
||
212 | if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) |
||
213 | ipc_answer_0(callid, EINVAL); |
||
214 | return 1; |
||
215 | } |
||
216 | |||
217 | ipc_answer_0(callid, EOK); |
||
218 | phone_hash = call.in_phone_hash; |
||
219 | |||
220 | /* |
||
221 | * FIXME: up until now no async calls can be used!!! |
||
222 | * (Which means e.g. printf() cannot be used) |
||
223 | */ |
||
224 | async_new_connection(phone_hash, 0, NULL, loader_connection); |
||
225 | async_manager(); |
||
226 | |||
2928 | svoboda | 227 | /* not reached */ |
228 | return 0; |
||
229 | } |
||
230 | |||
231 | /** @} |
||
232 | */ |