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  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
  35.  */
  36.  
  37. #include <stdio.h>
  38. #include <stdlib.h>
  39. #include <unistd.h>
  40. #include <fcntl.h>
  41. #include <sys/types.h>
  42. #include <ipc/ipc.h>
  43. #include <errno.h>
  44. #include <as.h>
  45.  
  46. #include <elf.h>
  47. #include <elf_load.h>
  48. #include <pcb.h>
  49.  
  50. #define RTLD_BIAS 0x80000
  51.  
  52. static char *pathname = NULL;
  53.  
  54. void iloader_set_pathname(ipc_callid_t rid, ipc_call_t *request)
  55. {
  56. //  ipc_callid_t callid;
  57.     size_t len;
  58.     char *name_buf;
  59.  
  60. /*  printf("iloader_set_pathname\n");
  61.     if (!ipc_data_write_receive(&callid, &len)) {
  62.         ipc_answer_0(callid, EINVAL);
  63.         ipc_answer_0(rid, EINVAL);
  64.         return;
  65.     }
  66. */
  67.     len = IPC_GET_ARG2(*request);
  68.     printf("alloc %d bytes\n", len+1);
  69.  
  70.     name_buf = malloc(len + 1);
  71.     if (!name_buf) {
  72. //      ipc_answer_0(callid, ENOMEM);
  73.         ipc_answer_0(rid, ENOMEM);
  74.         return;
  75.     }
  76.  
  77.     printf("write_finalize\n");
  78.     ipc_data_write_finalize(rid, name_buf, len);
  79. //  ipc_answer_0(rid, EOK);
  80.  
  81.     if (pathname != NULL) {
  82.         free(pathname);
  83.         pathname = NULL;
  84.     }
  85.  
  86.     pathname = name_buf;
  87. }
  88.  
  89. int iloader_run(ipc_callid_t rid, ipc_call_t *request)
  90. {
  91.     int rc;
  92.     pcb_t *pcb;
  93.  
  94.     elf_info_t prog_info;
  95.     elf_info_t interp_info;
  96.  
  97.     printf("Load program '%s'\n", pathname);
  98.  
  99.     rc = elf_load_file(pathname, 0, &prog_info);
  100.     if (rc < 0) {
  101.         printf("failed to load program\n");
  102.         return 1;
  103.     }
  104.  
  105.     printf("Create PCB\n");
  106.     if (elf_create_pcb(&prog_info) < 0) return 1;
  107.  
  108.     if (prog_info.interp == NULL) {
  109.         /* Statically linked program */
  110.         printf("Run statically linked program\n");
  111.         elf_run(&prog_info);
  112.         return 0;
  113.     }
  114.  
  115.     printf("Load dynamic linker '%s'\n", prog_info.interp);
  116.     rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);
  117.     if (rc < 0) {
  118.         printf("failed to load dynamic linker\n");
  119.         return 1;
  120.     }
  121.  
  122.     /*
  123.      * Provide dynamic linker with some useful data
  124.      */
  125.     pcb = (pcb_t *)PCB_ADDRESS;
  126.     pcb->rtld_dynamic = interp_info.dynamic;
  127.     pcb->rtld_bias = RTLD_BIAS;
  128.  
  129.     printf("run dynamic linker\n");
  130.     elf_run(&interp_info);
  131.  
  132.     return 0;
  133. }
  134.  
  135. int main(int argc, char *argv[])
  136. {
  137.     ipc_callid_t callid;
  138.     ipc_call_t call;
  139.     int retval;
  140.     int len;
  141.  
  142.     while (1) {
  143.         callid = ipc_wait_for_call(&call);
  144.         printf("received call, method=%d\n", IPC_GET_METHOD(call));
  145.         switch (IPC_GET_METHOD(call)) {
  146.         case IPC_M_DATA_WRITE:
  147.             iloader_set_pathname(callid, &call);
  148.             iloader_run(callid, &call);
  149.             exit(0);
  150.             continue;
  151.         default:
  152.             retval = ENOENT;
  153.             break;
  154.         }
  155.         if ((callid & IPC_CALLID_NOTIFICATION) == 0) {
  156.             printf("responding EINVAL to method %d\n", IPC_GET_METHOD(call));
  157.             ipc_answer_0(callid, EINVAL);
  158.         }
  159.     }
  160.  
  161.     /* not reached */
  162.     return 0;
  163. }
  164.  
  165. /** @}
  166.  */
  167.