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May 29th, 2017
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  1. #include "../generic/check_compat.c"
  2.  
  3. extern long *blob_chdk_core;
  4. extern long blob_chdk_core_size;
  5.  
  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;
  12.  
  13. core_copy(src, dst, length);
  14.  
  15. }
  16.  
  17. // restart function
  18. // from sub_FF83846C via 0x12345678
  19. asm volatile (
  20. " MOV R0, #0x78 \n"
  21. " MCR p15, 0, R0, c1, c0 \n"
  22. " MOV R0, #0 \n"
  23. " MCR p15, 0, R0, c7, c10, 4 \n"
  24. " MCR p15, 0, R0, c7, c5 \n"
  25. " MCR p15, 0, R0, c7, c6 \n"
  26. " MOV R0, #0x80000006 \n"
  27. " MCR p15, 0, R0, c9, c1 \n"
  28. " MCR p15, 0, R0, c9, c1, 1 \n"
  29. " MRC p15, 0, R0, c1, c0 \n"
  30. " ORR R0, R0, #0x50000 \n"
  31. " MCR p15, 0, R0, c1, c0 \n"
  32. " LDR R0, =0x12345678 \n"
  33. " MOV R1, #0x80000000 \n"
  34. " STR R0, [R1, #0xFFC] \n"
  35. //" BL sub_FF896A8C \n" // nullsub
  36. //" LDR R0, =0xFF820000 \n"
  37. "MOV R0, %0\n" // new jump-vector
  38. //" LDMFD SP!, {R4,LR} \n"
  39. " BX R0 \n"
  40. : : "r"(MEMISOSTART) : "memory","r0","r1","r2","r3","r4"
  41. );
  42.  
  43. while(1);
  44. }
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