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 static bool AllWritten;
  18 #define PHYSICAL_FLASH_START 0x100000
  19 #define PHYSICAL_FLASH_END   0x200000
  20
  21 void WaitForAck(void)
  22 {
  23   UsbCommand ack;
  24   ReceiveCommand(&ack);
  25   if (ack.cmd != CMD_ACK) {
  26     printf("bad ACK\n");
  27     exit(-1);
  28   }
  29 }
  30
  31 struct partition partitions[] = {
  32   {0x100000, 0x102000, 1, "bootrom"},
  33   {0x102000, 0x110000, 0, "fpga"},
  34   {0x110000, 0x140000, 0, "os"},
  35   {0, 0, 0, NULL},
  36 };
  37
  38 void WriteBlock(unsigned int block_start, unsigned int len, unsigned char *buf)
  39 {
  40   unsigned char temp_buf[256];
  41   if (block_start & 0xFF) {
  42     printf("moving stuff forward by %d bytes\n", block_start & 0xFF);
  43     memset(temp_buf, 0xFF, block_start & 0xFF);
  44     memcpy(temp_buf + (block_start & 0xFF), buf, len - (block_start & 0xFF));
  45     block_start &= ~0xFF;
  46   } else {
  47     memcpy(temp_buf, buf, len);
  48   }
  49
  50   UsbCommand c = {CMD_SETUP_WRITE};
  51
  52   for (int i = 0; i < 240; i += 48) {
  53     memcpy(c.d.asBytes, temp_buf+i, 48);
  54     c.arg[0] = (i/4);
  55     SendCommand(&c);
  56     WaitForAck();
  57   }
  58
  59   c.cmd = CMD_FINISH_WRITE;
  60   c.arg[0] = block_start;
  61
  62 //  printf("writing block %08x\r", c.arg[0]);
  63   memcpy(c.d.asBytes, temp_buf+240, 16);
  64   SendCommand(&c);
  65   WaitForAck();
  66
  67   AllWritten = true;
  68 }
  69
  70 void LoadFlashFromFile(const char *file, int start_addr, int end_addr)
  71 {
  72   FILE *f = fopen(file, "rb");
  73   if (!f) {
  74     printf("couldn't open file\n");
  75     exit(-1);
  76   }
  77
  78   char buf[4];
  79   fread(buf, 1, 4, f);
  80   if (memcmp(buf, "\x7F" "ELF", 4) == 0) {
  81     fseek(f, 0, SEEK_SET);
  82     Elf32_Ehdr header;
  83     fread(&header, 1, sizeof(header), f);
  84     int count = header.e_phnum;
  85     printf("count=%d phoff=%x\n", count, header.e_phoff);
  86     Elf32_Phdr phdr;
  87
  88     for (int i = 0; i < header.e_phnum; ++i) {
  89       fseek(f, header.e_phoff + i * sizeof(Elf32_Phdr), SEEK_SET);
  90       fread(&phdr, 1, sizeof(phdr), f);
  91       printf("type=%d offset=%x paddr=%x vaddr=%x filesize=%x memsize=%x flags=%x align=%x\n",
  92         phdr.p_type, phdr.p_offset, phdr.p_paddr, phdr.p_vaddr, phdr.p_filesz, phdr.p_memsz, phdr.p_flags, phdr.p_align);
  93       if (phdr.p_type == PT_LOAD && phdr.p_filesz > 0 && phdr.p_paddr >= PHYSICAL_FLASH_START
  94         && (phdr.p_paddr + phdr.p_filesz) < PHYSICAL_FLASH_END) {
  95         printf("flashing offset=%x paddr=%x size=%x\n", phdr.p_offset, phdr.p_paddr, phdr.p_filesz);
  96         if (phdr.p_offset == 0) {
  97           printf("skipping forward 0x2000 because of strange linker thing\n");
  98           phdr.p_offset += 0x2000;
  99           phdr.p_paddr += 0x2000;
 100           phdr.p_filesz -= 0x2000;
 101           phdr.p_memsz -= 0x2000;
 102         }
 103
 104         fseek(f, phdr.p_offset, SEEK_SET);
 105         ExpectedAddr = phdr.p_paddr;
 106         while (ExpectedAddr < (phdr.p_paddr + phdr.p_filesz)) {
 107           unsigned int bytes_to_read = phdr.p_paddr + phdr.p_filesz - ExpectedAddr;
 108           if (bytes_to_read > 256)
 109             bytes_to_read=256;
 110           else
 111             memset(QueuedToSend, 0xFF, 256);
 112           fread(QueuedToSend, 1, bytes_to_read, f);
 113           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,
 114             QueuedToSend[0], QueuedToSend[1], QueuedToSend[2], QueuedToSend[3],
 115             QueuedToSend[4], QueuedToSend[5], QueuedToSend[6], QueuedToSend[7],
 116             QueuedToSend[248], QueuedToSend[249], QueuedToSend[250], QueuedToSend[251],
 117             QueuedToSend[252], QueuedToSend[253], QueuedToSend[254], QueuedToSend[255]);
 118           WriteBlock(ExpectedAddr, 256, QueuedToSend);
 119           ExpectedAddr += bytes_to_read;
 120         }
 121       }
 122     }
 123
 124     fclose(f);
 125     printf("\ndone.\n");
 126     return;
 127   } else printf("Bad file format\n");
 128 }
 129
 130 int PrepareFlash(struct partition *p, const char *filename, unsigned int state)
 131 {
 132   if (state & DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH) {
 133     UsbCommand c = {CMD_START_FLASH, {p->start, p->end, 0}};
 134
 135     /* Only send magic when flashing bootrom */
 136     if (p->precious)
 137       c.arg[2] = START_FLASH_MAGIC;
 138     else
 139       c.arg[2] = 0;
 140
 141     SendCommand(&c);
 142     WaitForAck();
 143   } else {
 144     fprintf(stderr, "Warning: Your bootloader does not understand the new START_FLASH command\n");
 145     fprintf(stderr, "         It is recommended that you update your bootloader\n\n");
 146     exit(0);
 147   }
 148
 149   LoadFlashFromFile(filename, p->start, p->end);
 150   return 1;
 151 }
 152
 153 unsigned int GetProxmarkState(void)
 154 {
 155   unsigned int state = 0;
 156
 157   UsbCommand c;
 158   c.cmd = CMD_DEVICE_INFO;
 159   SendCommand(&c);
 160
 161   UsbCommand resp;
 162   ReceiveCommand(&resp);
 163   /* Three cases:
 164   * 1. The old bootrom code will ignore CMD_DEVICE_INFO, but respond with an ACK
 165   * 2. The old os code will respond with CMD_DEBUG_PRINT_STRING and "unknown command"
 166   * 3. The new bootrom and os codes will respond with CMD_DEVICE_INFO and flags
 167   */
 168
 169   switch (resp.cmd) {
 170   case CMD_ACK:
 171     state = DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM;
 172     break;
 173   case CMD_DEBUG_PRINT_STRING:
 174     state = DEVICE_INFO_FLAG_CURRENT_MODE_OS;
 175     break;
 176   case CMD_DEVICE_INFO:
 177     state = resp.arg[0];
 178     break;
 179   default:
 180     fprintf(stderr, "Couldn't get proxmark state, bad response type: 0x%04X\n", resp.cmd);
 181     exit(-1);
 182     break;
 183   }
 184
 185   return state;
 186 }
 187
 188 unsigned int EnterFlashState(void)
 189 {
 190   unsigned int state = GetProxmarkState();
 191
 192   if (state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM) {
 193     /* Already in flash state, we're done. */
 194     return state;
 195   }
 196
 197   if (state & DEVICE_INFO_FLAG_CURRENT_MODE_OS) {
 198     fprintf(stderr,"Entering flash-mode...\n");
 199     UsbCommand c;
 200     bzero(&c, sizeof(c));
 201
 202     if ((state & DEVICE_INFO_FLAG_BOOTROM_PRESENT) && (state & DEVICE_INFO_FLAG_OSIMAGE_PRESENT)) {
 203       /* New style handover: Send CMD_START_FLASH, which will reset the board and
 204        * enter the bootrom on the next boot.
 205       */
 206       c.cmd = CMD_START_FLASH;
 207       SendCommand(&c);
 208       fprintf(stderr,"(You don't have to do anything. Press and release the button only if you want to abort)\n");
 209       fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 210     } else {
 211       /* Old style handover: Ask the user to press the button, then reset the board */
 212       c.cmd = CMD_HARDWARE_RESET;
 213       SendCommand(&c);
 214       fprintf(stderr,"(Press and hold down button NOW if your bootloader requires it)\n");
 215       fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 216     }
 217
 218 #ifdef WIN32
 219     Sleep(1000);
 220     while (!UsbConnect()) { Sleep(1000); }
 221 #else
 222     CloseProxmark();
 223     sleep(1);
 224
 225     while (!OpenProxmark(0)) { sleep(1); }
 226 #endif
 227     fprintf(stderr,"Found.\n");
 228
 229     return GetProxmarkState();
 230   }
 231
 232   return 0;
 233 }
 234
 235 /* On first call, have *offset = -1, *length = 0; */
 236 int find_next_area(const char *str, int *offset, int *length)
 237 {
 238   if (*str == '\0') return 0;
 239   if ((*offset >= 0) && str[*offset + *length] == '\0') return 0;
 240   *offset += 1 + *length;
 241
 242   char *next_comma = strchr(str + *offset, ',');
 243   if (next_comma == NULL) {
 244     *length = strlen(str) - *offset;
 245   } else {
 246     *length = next_comma-(str+*offset);
 247   }
 248   return 1;
 249 }
 250
 251 void do_flash(char **argv)
 252 {
 253   unsigned int state = EnterFlashState();
 254
 255   if (!(state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM)) {
 256     fprintf(stderr, "Proxmark would not enter flash state, abort\n");
 257     exit(-1);
 258   }
 259
 260   int offset=-1, length=0;
 261   int current_area = 0;
 262   while (find_next_area(argv[1], &offset, &length)) {
 263     struct partition *p = NULL;
 264     for (int i = 0; i<sizeof(partitions)/sizeof(partitions[0]); ++i) {
 265       if (strncmp(partitions[i].name, argv[1] + offset, length) == 0) {
 266         /* Check if the name matches the bootrom partition, and if so, require "bootrom" to
 267          * be written in full. The other names may be abbreviated.
 268         */
 269         if(!partitions[i].precious || (strlen(partitions[i].name) == length))
 270           p = &partitions[i];
 271         break;
 272       }
 273     }
 274
 275     if (p == NULL) {
 276       fprintf(stderr, "Warning: area name '");
 277       fwrite(argv[1]+offset, length, 1, stderr);
 278       fprintf(stderr, "' unknown, ignored\n");
 279     } else {
 280       fprintf(stderr, "Flashing %s from %s\n", p->name, argv[2+current_area]);
 281       PrepareFlash(p, argv[2+current_area], state);
 282     }
 283     current_area++;
 284   }
 285 }