sdelfloader/loader/source/dol.c

   1 // this code was contributed by shagkur of the devkitpro team, thx!
   2
   3 #include <stdio.h>
   4 #include <string.h>
   5
   6 #include <gccore.h>
   7 #include <ogcsys.h>
   8
   9 typedef struct _dolheader {
  10         u32 text_pos[7];
  11         u32 data_pos[11];
  12         u32 text_start[7];
  13         u32 data_start[11];
  14         u32 text_size[7];
  15         u32 data_size[11];
  16         u32 bss_start;
  17         u32 bss_size;
  18         u32 entry_point;
  19 } dolheader;
  20
  21 u32 load_dol_image (void *dolstart) {
  22         u32 i;
  23         dolheader *dolfile;
  24
  25         if (dolstart) {
  26                 dolfile = (dolheader *) dolstart;
  27                 for (i = 0; i < 7; i++) {
  28                         if ((!dolfile->text_size[i]) ||
  29                             (dolfile->text_start[i] < 0x100))
  30                                 continue;
  31
  32                         printf ("loading text section %u @ 0x%08x "
  33                                 "(0x%08x bytes)\n",
  34                                 i, dolfile->text_start[i],
  35                                 dolfile->text_size[i]);
  36                         VIDEO_WaitVSync();
  37
  38                         ICInvalidateRange ((void *) dolfile->text_start[i],
  39                                                     dolfile->text_size[i]);
  40                         memmove ((void *) dolfile->text_start[i],
  41                                  dolstart+dolfile->text_pos[i],
  42                                  dolfile->text_size[i]);
  43                 }
  44
  45                 for(i = 0; i < 11; i++) {
  46                         if ((!dolfile->data_size[i]) ||
  47                             (dolfile->data_start[i] < 0x100))
  48                                 continue;
  49
  50                         printf ("loading data section %u @ 0x%08x "
  51                                 "(0x%08x bytes)\n",
  52                                 i, dolfile->data_start[i],
  53                                 dolfile->data_size[i]);
  54                         VIDEO_WaitVSync();
  55
  56                         memmove ((void*) dolfile->data_start[i],
  57                                  dolstart+dolfile->data_pos[i],
  58                                  dolfile->data_size[i]);
  59                         DCFlushRangeNoSync ((void *) dolfile->data_start[i],
  60                                             dolfile->data_size[i]);
  61                 }
  62
  63                 printf ("clearing bss\n");
  64                 VIDEO_WaitVSync();
  65
  66                 memset ((void *) dolfile->bss_start, 0, dolfile->bss_size);
  67                 DCFlushRange((void *) dolfile->bss_start, dolfile->bss_size);
  68
  69                 return dolfile->entry_point;
  70         }
  71
  72         return 0;
  73 }
  74