git.zerfleddert.de Git - proxmark3-svn/blob - client/flash.c

   1 #ifdef WIN32
   2 #include <windows.h>
   3 #include <setupapi.h>
   4 #define bzero(b,len) (memset((b), '\0', (len)), (void) 0)
   5 BOOL UsbConnect(void);
   6 #endif
   7 #include <proxusb.h>
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include "flash.h"
  13 #include "elf.h"
  14
  15 static uint32_t ExpectedAddr;
  16 static uint8_t QueuedToSend[256];
  17 #define PHYSICAL_FLASH_START 0x100000
  18 #define PHYSICAL_FLASH_END   0x200000
  19
  20 void WaitForAck(void)
  21 {
  22   UsbCommand ack;
  23   ReceiveCommand(&ack);
  24   if (ack.cmd != CMD_ACK) {
  25     printf("bad ACK\n");
  26     exit(-1);
  27   }
  28 }
  29
  30 struct partition partitions[] = {
  31   {0x100000, 0x102000, 1, "bootrom"},
  32   {0x102000, 0x110000, 0, "fpga"},
  33   {0x110000, 0x140000, 0, "os"},
  34   {0, 0, 0, NULL},
  35 };
  36
  37 void WriteBlock(unsigned int block_start, unsigned int len, unsigned char *buf)
  38 {
  39   unsigned char temp_buf[256];
  40   if (block_start & 0xFF) {
  41     printf("moving stuff forward by %d bytes\n", block_start & 0xFF);
  42     memset(temp_buf, 0xFF, block_start & 0xFF);
  43     memcpy(temp_buf + (block_start & 0xFF), buf, len - (block_start & 0xFF));
  44     block_start &= ~0xFF;
  45   } else {
  46     memcpy(temp_buf, buf, len);
  47   }
  48
  49   UsbCommand c = {CMD_SETUP_WRITE};
  50
  51   for (int i = 0; i < 240; i += 48) {
  52     memcpy(c.d.asBytes, temp_buf+i, 48);
  53     c.arg[0] = (i/4);
  54     SendCommand(&c);
  55     WaitForAck();
  56   }
  57
  58   c.cmd = CMD_FINISH_WRITE;
  59   c.arg[0] = block_start;
  60
  61 //  printf("writing block %08x\r", c.arg[0]);
  62   memcpy(c.d.asBytes, temp_buf+240, 16);
  63   SendCommand(&c);
  64   WaitForAck();
  65 }
  66
  67 void LoadFlashFromFile(const char *file, int start_addr, int end_addr)
  68 {
  69   FILE *f = fopen(file, "rb");
  70   if (!f) {
  71     printf("couldn't open file\n");
  72     exit(-1);
  73   }
  74
  75   char buf[4];
  76   fread(buf, 1, 4, f);
  77   if (memcmp(buf, "\x7F" "ELF", 4) == 0) {
  78     fseek(f, 0, SEEK_SET);
  79     Elf32_Ehdr header;
  80     fread(&header, 1, sizeof(header), f);
  81     int count = header.e_phnum;
  82     printf("count=%d phoff=%x\n", count, header.e_phoff);
  83     Elf32_Phdr phdr;
  84
  85     for (int i = 0; i < header.e_phnum; ++i) {
  86       fseek(f, header.e_phoff + i * sizeof(Elf32_Phdr), SEEK_SET);
  87       fread(&phdr, 1, sizeof(phdr), f);
  88       printf("type=%d offset=%x paddr=%x vaddr=%x filesize=%x memsize=%x flags=%x align=%x\n",
  89         phdr.p_type, phdr.p_offset, phdr.p_paddr, phdr.p_vaddr, phdr.p_filesz, phdr.p_memsz, phdr.p_flags, phdr.p_align);
  90       if (phdr.p_type == PT_LOAD && phdr.p_filesz > 0 && phdr.p_paddr >= PHYSICAL_FLASH_START
  91         && (phdr.p_paddr + phdr.p_filesz) < PHYSICAL_FLASH_END) {
  92         printf("flashing offset=%x paddr=%x size=%x\n", phdr.p_offset, phdr.p_paddr, phdr.p_filesz);
  93         if (phdr.p_offset == 0) {
  94           printf("skipping forward 0x2000 because of strange linker thing\n");
  95           phdr.p_offset += 0x2000;
  96           phdr.p_paddr += 0x2000;
  97           phdr.p_filesz -= 0x2000;
  98           phdr.p_memsz -= 0x2000;
  99         }
 100
 101         fseek(f, phdr.p_offset, SEEK_SET);
 102         ExpectedAddr = phdr.p_paddr;
 103         while (ExpectedAddr < (phdr.p_paddr + phdr.p_filesz)) {
 104           unsigned int bytes_to_read = phdr.p_paddr + phdr.p_filesz - ExpectedAddr;
 105           if (bytes_to_read > 256)
 106             bytes_to_read=256;
 107           else
 108             memset(QueuedToSend, 0xFF, 256);
 109           fread(QueuedToSend, 1, bytes_to_read, f);
 110           printf("WriteBlock(%x, %d, %02x %02x %02x %02x %02x %02x %02x %02x ... %02x %02x %02x %02x %02x %02x %02x %02x)\n", ExpectedAddr, bytes_to_read,
 111             QueuedToSend[0], QueuedToSend[1], QueuedToSend[2], QueuedToSend[3],
 112             QueuedToSend[4], QueuedToSend[5], QueuedToSend[6], QueuedToSend[7],
 113             QueuedToSend[248], QueuedToSend[249], QueuedToSend[250], QueuedToSend[251],
 114             QueuedToSend[252], QueuedToSend[253], QueuedToSend[254], QueuedToSend[255]);
 115           WriteBlock(ExpectedAddr, 256, QueuedToSend);
 116           ExpectedAddr += bytes_to_read;
 117         }
 118       }
 119     }
 120
 121     fclose(f);
 122     printf("\ndone.\n");
 123     return;
 124   } else printf("Bad file format\n");
 125 }
 126
 127 int PrepareFlash(struct partition *p, const char *filename, unsigned int state)
 128 {
 129   if (state & DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH) {
 130     UsbCommand c = {CMD_START_FLASH, {p->start, p->end, 0}};
 131
 132     /* Only send magic when flashing bootrom */
 133     if (p->precious)
 134       c.arg[2] = START_FLASH_MAGIC;
 135     else
 136       c.arg[2] = 0;
 137
 138     SendCommand(&c);
 139     WaitForAck();
 140   } else {
 141     fprintf(stderr, "Warning: Your bootloader does not understand the new START_FLASH command\n");
 142     fprintf(stderr, "         It is recommended that you update your bootloader\n\n");
 143     exit(0);
 144   }
 145
 146   LoadFlashFromFile(filename, p->start, p->end);
 147   return 1;
 148 }
 149
 150 unsigned int GetProxmarkState(void)
 151 {
 152   unsigned int state = 0;
 153
 154   UsbCommand c;
 155   c.cmd = CMD_DEVICE_INFO;
 156   SendCommand(&c);
 157
 158   UsbCommand resp;
 159   ReceiveCommand(&resp);
 160   /* Three cases:
 161   * 1. The old bootrom code will ignore CMD_DEVICE_INFO, but respond with an ACK
 162   * 2. The old os code will respond with CMD_DEBUG_PRINT_STRING and "unknown command"
 163   * 3. The new bootrom and os codes will respond with CMD_DEVICE_INFO and flags
 164   */
 165
 166   switch (resp.cmd) {
 167   case CMD_ACK:
 168     state = DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM;
 169     break;
 170   case CMD_DEBUG_PRINT_STRING:
 171     state = DEVICE_INFO_FLAG_CURRENT_MODE_OS;
 172     break;
 173   case CMD_DEVICE_INFO:
 174     state = resp.arg[0];
 175     break;
 176   default:
 177     fprintf(stderr, "Couldn't get proxmark state, bad response type: 0x%04X\n", resp.cmd);
 178     exit(-1);
 179     break;
 180   }
 181
 182   return state;
 183 }
 184
 185 unsigned int EnterFlashState(void)
 186 {
 187   unsigned int state = GetProxmarkState();
 188
 189   if (state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM) {
 190     /* Already in flash state, we're done. */
 191     return state;
 192   }
 193
 194   if (state & DEVICE_INFO_FLAG_CURRENT_MODE_OS) {
 195     fprintf(stderr,"Entering flash-mode...\n");
 196     UsbCommand c;
 197     bzero(&c, sizeof(c));
 198
 199     if ((state & DEVICE_INFO_FLAG_BOOTROM_PRESENT) && (state & DEVICE_INFO_FLAG_OSIMAGE_PRESENT)) {
 200       /* New style handover: Send CMD_START_FLASH, which will reset the board and
 201        * enter the bootrom on the next boot.
 202       */
 203       c.cmd = CMD_START_FLASH;
 204       SendCommand(&c);
 205       fprintf(stderr,"(You don't have to do anything. Press and release the button only if you want to abort)\n");
 206       fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 207     } else {
 208       /* Old style handover: Ask the user to press the button, then reset the board */
 209       c.cmd = CMD_HARDWARE_RESET;
 210       SendCommand(&c);
 211       fprintf(stderr,"(Press and hold down button NOW if your bootloader requires it)\n");
 212       fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 213     }
 214
 215 #ifdef WIN32
 216     Sleep(1000);
 217     while (!UsbConnect()) { Sleep(1000); }
 218 #else
 219     CloseProxmark();
 220     sleep(1);
 221
 222     while (!OpenProxmark(0)) { sleep(1); }
 223 #endif
 224     fprintf(stderr,"Found.\n");
 225
 226     return GetProxmarkState();
 227   }
 228
 229   return 0;
 230 }
 231
 232 /* On first call, have *offset = -1, *length = 0; */
 233 int find_next_area(const char *str, int *offset, int *length)
 234 {
 235   if (*str == '\0') return 0;
 236   if ((*offset >= 0) && str[*offset + *length] == '\0') return 0;
 237   *offset += 1 + *length;
 238
 239   char *next_comma = strchr(str + *offset, ',');
 240   if (next_comma == NULL) {
 241     *length = strlen(str) - *offset;
 242   } else {
 243     *length = next_comma-(str+*offset);
 244   }
 245   return 1;
 246 }
 247
 248 void do_flash(char **argv)
 249 {
 250   unsigned int state = EnterFlashState();
 251
 252   if (!(state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM)) {
 253     fprintf(stderr, "Proxmark would not enter flash state, abort\n");
 254     exit(-1);
 255   }
 256
 257   int offset=-1, length=0;
 258   int current_area = 0;
 259   while (find_next_area(argv[1], &offset, &length)) {
 260     struct partition *p = NULL;
 261     for (int i = 0; i<sizeof(partitions)/sizeof(partitions[0]); ++i) {
 262       if (strncmp(partitions[i].name, argv[1] + offset, length) == 0) {
 263         /* Check if the name matches the bootrom partition, and if so, require "bootrom" to
 264          * be written in full. The other names may be abbreviated.
 265         */
 266         if(!partitions[i].precious || (strlen(partitions[i].name) == length))
 267           p = &partitions[i];
 268         break;
 269       }
 270     }
 271
 272     if (p == NULL) {
 273       fprintf(stderr, "Warning: area name '");
 274       fwrite(argv[1]+offset, length, 1, stderr);
 275       fprintf(stderr, "' unknown, ignored\n");
 276     } else {
 277       fprintf(stderr, "Flashing %s from %s\n", p->name, argv[2+current_area]);
 278       PrepareFlash(p, argv[2+current_area], state);
 279     }
 280     current_area++;
 281   }
 282 }