root/loader/a4000/main.c

DEFINITIONS

1. my_restart

   1 #include "../generic/check_compat.c"
   3 extern long *blob_chdk_core;
   4 extern long blob_chdk_core_size;
   6 void __attribute__((noreturn)) my_restart()
   7 {
   8         {
   9                 long *dst = (long*)MEMISOSTART;
  10         const long *src = blob_chdk_core;
  11         long length = (blob_chdk_core_size + 3) >> 2;
core_copy(src, dst, length);
  15 }
  17         //a4000 100c found @ 0xFF835AC4
  18     asm volatile (
  19       "LDR     R1, =0xC0200000\n"
  20       "MVN     R0, #0\n"
  21       "STR     R0, [R1, #0x10C]\n"
  22       "STR     R0, [R1, #0xC]\n"
  23       "STR     R0, [R1, #0x1C]\n"
  24       "STR     R0, [R1, #0x2C]\n"
  25       "STR     R0, [R1, #0x3C]\n"
  26       "STR     R0, [R1, #0x4C]\n"
  27       "STR     R0, [R1, #0x5C]\n"
  28       "STR     R0, [R1, #0x6C]\n"
  29       "STR     R0, [R1, #0x7C]\n"
  30       "STR     R0, [R1, #0x8C]\n"
  31       "STR     R0, [R1, #0x9C]\n"
  32       "STR     R0, [R1, #0xAC]\n"
  33       "STR     R0, [R1, #0xBC]\n"
  34       "STR     R0, [R1, #0xCC]\n"
  35       "STR     R0, [R1, #0xDC]\n"
  36       "STR     R0, [R1, #0xEC]\n"
  37       "CMP     R4, #7\n"
  38       "STR     R0, [R1, #0xFC]\n"
  39       //"LDMEQFD SP!, {R4,PC}\n"
  40       "MOV     R0, #0x78\n"
  41       "MCR     p15, 0, R0, c1, c0\n"
  42       "MOV     R0, #0\n"
  43       "MCR     p15, 0, R0, c7, c10, 4\n"
  44       "MCR     p15, 0, R0, c7, c5\n"
  45       "MCR     p15, 0, R0, c7, c6\n"
  46       "MOV     R0, #0x80000006\n"
  47       "MCR     p15, 0, R0, c9, c1\n"
  48       "MCR     p15, 0, R0, c9, c1, 1\n"
  49       "MRC     p15, 0, R0, c1, c0\n"
  50       "ORR     R0, R0, #0x50000\n"
  51       "MCR     p15, 0, R0, c1, c0\n"
  52       "LDR     R0, =0x12345678\n"
  53       "MOV     R1, #0x80000000\n"
  54       "STR     R0, [R1, #0xFFC]\n"
  55       // "LDR     R0, =0xFF810000 \n" //original jump-vector
  56       "MOV     R0, %0\n"              // new jump-vector
  57       "LDMFD   SP!, {R4,LR}\n"
  58       "BX      R0\n"
  59       : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4"
  60     );
  62     while(1);
  63 }