balong-usbload/patcher.c

#include <stdint.h>
#include <string.h>
#include "patcher.h"

//***********************************************************************
//* Поиск сигнатуры и наложение патча
//***********************************************************************
uint32_t patch(struct defpatch fp, uint8_t* buf, uint32_t fsize) {

// накладываемый патч - mov r0,#0
const char nop0[4]={0, 0, 0xa0, 0xe3};   
uint32_t i;

for(i=8;i<(fsize-60);i+=4) {
  if (memcmp(buf+i,fp.sig, fp.sigsize) == 0) {
    // найдена сигнатура - накладываем патч и уходим
    memcpy(buf+i+fp.sigsize+fp.poffset,nop0,4);
    return i;
  }
}
// сигнатрура не найдена
return 0;
}

//**********************************************
// Описатели патчей
//**********************************************

const char sigburn_v7r11[]={
   0x00, 0x00, 0x50, 0xE3, 0x70, 0x80, 0xBD, 0x08, 0x00, 0x30, 0xA0, 0xE3, 
   0x4E, 0x26, 0x04, 0xE3, 0xE0, 0x3F, 0x44, 0xE3, 0x55, 0x22, 0x44, 0xE3, 
   0x4C, 0x01, 0x9F, 0xE5, 0x4E, 0xC6, 0x04, 0xE3, 0x48, 0x41, 0x9F, 0xE5, 
   0x02, 0x10, 0xA0, 0xE1, 0x4C, 0xC4, 0x44, 0xE3, 0x5C, 0x23, 0x83, 0xE5, 
   0x00, 0x00, 0x8F, 0xE0, 0x40, 0xC3, 0x83, 0xE5};

const char sigburn_v7r2[]={   
   0x00, 0x30, 0xA0, 0xE3, 0x9A, 0x3F, 0x07, 0xEE, 0xFF, 0x2F, 0x0F, 0xE3,
   0xE1, 0x2F, 0x44, 0xE3, 0x07, 0x30, 0x02, 0xE5, 0x9A, 0x3F, 0x07, 0xEE, 
   0x00, 0x40, 0xA0, 0xE3, 0xE0, 0x4F, 0x44, 0xE3, 0x4E, 0x36, 0x04, 0xE3, 
   0x4C, 0x34, 0x44, 0xE3, 0x30, 0x33, 0x84, 0xE5};
 
   
const char sigbad[]={0x04, 0x10, 0x8D, 0xE2, 0x04, 0x00, 0xA0, 0xE1};

struct defpatch patch_v7r11={sigburn_v7r11, sizeof(sigburn_v7r11), 4};   
struct defpatch patch_v7r2={sigburn_v7r2, sizeof(sigburn_v7r2), 16};   
struct defpatch patch_erasebad={sigbad, sizeof(sigbad), 0};   
   

//****************************************************
//* Процедуры патча под разные чипсеты и задачи
//****************************************************

uint32_t pv7r2 (uint8_t* buf, uint32_t fsize) { return patch(patch_v7r2, buf, fsize); }
uint32_t pv7r11 (uint8_t* buf, uint32_t fsize) { return patch(patch_v7r11, buf, fsize); }
uint32_t perasebad (uint8_t* buf, uint32_t fsize) { return patch(patch_erasebad, buf, fsize); }