root/loader/sx410is/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);
  14     }
  16     // restart function
  17     // from sub_FF83846C via 0x12345678
  18     asm volatile (
  19                 "    MOV     R0, #0x78 \n" 
  20                 "    MCR     p15, 0, R0, c1, c0 \n" 
  21                 "    MOV     R0, #0 \n" 
  22                 "    MCR     p15, 0, R0, c7, c10, 4 \n" 
  23                 "    MCR     p15, 0, R0, c7, c5 \n" 
  24                 "    MCR     p15, 0, R0, c7, c6 \n" 
  25                 "    MOV     R0, #0x80000006 \n" 
  26                 "    MCR     p15, 0, R0, c9, c1 \n" 
  27                 "    MCR     p15, 0, R0, c9, c1, 1 \n" 
  28                 "    MRC     p15, 0, R0, c1, c0 \n" 
  29                 "    ORR     R0, R0, #0x50000 \n" 
  30                 "    MCR     p15, 0, R0, c1, c0 \n" 
  31                 "    LDR     R0, =0x12345678 \n" 
  32                 "    MOV     R1, #0x80000000 \n" 
  33                 "    STR     R0, [R1, #0xFFC] \n" 
  34                 //"    BL      sub_FF896A8C \n"  // nullsub
  35                 //"    LDR     R0, =0xFF820000 \n" 
  36                 "MOV     R0, %0\n"              // new jump-vector                              
  37                 //"    LDMFD   SP!, {R4,LR} \n" 
  38                 "    BX      R0 \n" 
  39          : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4"
  40         );
  42         while(1);
  43 }