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 #else
   7 #include <proxusb.h>
   8 #endif
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <stdlib.h>
  13 #include "flash.h"
  14 #include "elf.h"
  15
  16 static uint32_t ExpectedAddr;
  17 static uint8_t QueuedToSend[256];
  18 static bool AllWritten;
  19 #define PHYSICAL_FLASH_START 0x100000
  20 #define PHYSICAL_FLASH_END   0x200000
  21
  22 void WaitForAck(void)
  23 {
  24   UsbCommand ack;
  25   ReceiveCommand(&ack);
  26   if (ack.cmd != CMD_ACK) {
  27     printf("bad ACK\n");
  28     exit(-1);
  29   }
  30 }
  31
  32 struct partition partitions[] = {
  33   {0x100000, 0x102000, 1, "bootrom"},
  34   {0x102000, 0x110000, 0, "fpga"},
  35   {0x110000, 0x140000, 0, "os"},
  36   {0, 0, 0, NULL},
  37 };
  38
  39 void WriteBlock(unsigned int block_start, unsigned int len, unsigned char *buf)
  40 {
  41   unsigned char temp_buf[256];
  42   if (block_start & 0xFF) {
  43     printf("moving stuff forward by %d bytes\n", block_start & 0xFF);
  44     memset(temp_buf, 0xFF, block_start & 0xFF);
  45     memcpy(temp_buf + (block_start & 0xFF), buf, len - (block_start & 0xFF));
  46     block_start &= ~0xFF;
  47   } else {
  48     memcpy(temp_buf, buf, len);
  49   }
  50
  51   UsbCommand c = {CMD_SETUP_WRITE};
  52
  53   for (int i = 0; i < 240; i += 48) {
  54     memcpy(c.d.asBytes, temp_buf+i, 48);
  55     c.arg[0] = (i/4);
  56     SendCommand(&c);
  57     WaitForAck();
  58   }
  59
  60   c.cmd = CMD_FINISH_WRITE;
  61   c.arg[0] = block_start;
  62
  63 //  printf("writing block %08x\r", c.arg[0]);
  64   memcpy(c.d.asBytes, temp_buf+240, 16);
  65   SendCommand(&c);
  66   WaitForAck();
  67
  68   AllWritten = true;
  69 }
  70
  71 void LoadFlashFromFile(const char *file, int start_addr, int end_addr)
  72 {
  73   FILE *f = fopen(file, "rb");
  74   if (!f) {
  75     printf("couldn't open file\n");
  76     exit(-1);
  77   }
  78
  79   char buf[4];
  80   fread(buf, 1, 4, f);
  81   if (memcmp(buf, "\x7F" "ELF", 4) == 0) {
  82     fseek(f, 0, SEEK_SET);
  83     Elf32_Ehdr header;
  84     fread(&header, 1, sizeof(header), f);
  85     int count = header.e_phnum;
  86     printf("count=%d phoff=%x\n", count, header.e_phoff);
  87     Elf32_Phdr phdr;
  88
  89     for (int i = 0; i < header.e_phnum; ++i) {
  90       fseek(f, header.e_phoff + i * sizeof(Elf32_Phdr), SEEK_SET);
  91       fread(&phdr, 1, sizeof(phdr), f);
  92       printf("type=%d offset=%x paddr=%x vaddr=%x filesize=%x memsize=%x flags=%x align=%x\n",
  93         phdr.p_type, phdr.p_offset, phdr.p_paddr, phdr.p_vaddr, phdr.p_filesz, phdr.p_memsz, phdr.p_flags, phdr.p_align);
  94       if (phdr.p_type == PT_LOAD && phdr.p_filesz > 0 && phdr.p_paddr >= PHYSICAL_FLASH_START
  95         && (phdr.p_paddr + phdr.p_filesz) < PHYSICAL_FLASH_END) {
  96         printf("flashing offset=%x paddr=%x size=%x\n", phdr.p_offset, phdr.p_paddr, phdr.p_filesz);
  97         if (phdr.p_offset == 0) {
  98           printf("skipping forward 0x2000 because of strange linker thing\n");
  99           phdr.p_offset += 0x2000;
 100           phdr.p_paddr += 0x2000;
 101           phdr.p_filesz -= 0x2000;
 102           phdr.p_memsz -= 0x2000;
 103         }
 104
 105         fseek(f, phdr.p_offset, SEEK_SET);
 106         ExpectedAddr = phdr.p_paddr;
 107         while (ExpectedAddr < (phdr.p_paddr + phdr.p_filesz)) {
 108           unsigned int bytes_to_read = phdr.p_paddr + phdr.p_filesz - ExpectedAddr;
 109           if (bytes_to_read > 256)
 110             bytes_to_read=256;
 111           else
 112             memset(QueuedToSend, 0xFF, 256);
 113           fread(QueuedToSend, 1, bytes_to_read, f);
 114           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,
 115             QueuedToSend[0], QueuedToSend[1], QueuedToSend[2], QueuedToSend[3],
 116             QueuedToSend[4], QueuedToSend[5], QueuedToSend[6], QueuedToSend[7],
 117             QueuedToSend[248], QueuedToSend[249], QueuedToSend[250], QueuedToSend[251],
 118             QueuedToSend[252], QueuedToSend[253], QueuedToSend[254], QueuedToSend[255]);
 119           WriteBlock(ExpectedAddr, 256, QueuedToSend);
 120           ExpectedAddr += bytes_to_read;
 121         }
 122       }
 123     }
 124
 125     fclose(f);
 126     printf("\ndone.\n");
 127     return;
 128   } else printf("Bad file format\n");
 129 }
 130
 131 int PrepareFlash(struct partition *p, const char *filename, unsigned int state)
 132 {
 133   if (state & DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH) {
 134     UsbCommand c = {CMD_START_FLASH, {p->start, p->end, 0}};
 135
 136     /* Only send magic when flashing bootrom */
 137     if (p->precious)
 138       c.arg[2] = START_FLASH_MAGIC;
 139     else
 140       c.arg[2] = 0;
 141
 142     SendCommand(&c);
 143     WaitForAck();
 144   } else {
 145     fprintf(stderr, "Warning: Your bootloader does not understand the new START_FLASH command\n");
 146     fprintf(stderr, "         It is recommended that you update your bootloader\n\n");
 147     exit(0);
 148   }
 149
 150   LoadFlashFromFile(filename, p->start, p->end);
 151   return 1;
 152 }
 153
 154 unsigned int GetProxmarkState(void)
 155 {
 156   unsigned int state = 0;
 157
 158   UsbCommand c;
 159   c.cmd = CMD_DEVICE_INFO;
 160   SendCommand(&c);
 161
 162   UsbCommand resp;
 163   ReceiveCommand(&resp);
 164   /* Three cases:
 165   * 1. The old bootrom code will ignore CMD_DEVICE_INFO, but respond with an ACK
 166   * 2. The old os code will respond with CMD_DEBUG_PRINT_STRING and "unknown command"
 167   * 3. The new bootrom and os codes will respond with CMD_DEVICE_INFO and flags
 168   */
 169
 170   switch (resp.cmd) {
 171   case CMD_ACK:
 172     state = DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM;
 173     break;
 174   case CMD_DEBUG_PRINT_STRING:
 175     state = DEVICE_INFO_FLAG_CURRENT_MODE_OS;
 176     break;
 177   case CMD_DEVICE_INFO:
 178     state = resp.arg[0];
 179     break;
 180   default:
 181     fprintf(stderr, "Couldn't get proxmark state, bad response type: 0x%04X\n", resp.cmd);
 182     exit(-1);
 183     break;
 184   }
 185
 186   return state;
 187 }
 188
 189 unsigned int EnterFlashState(void)
 190 {
 191   unsigned int state = GetProxmarkState();
 192
 193   if (state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM) {
 194     /* Already in flash state, we're done. */
 195     return state;
 196   }
 197
 198   if (state & DEVICE_INFO_FLAG_CURRENT_MODE_OS) {
 199     fprintf(stderr,"Entering flash-mode...\n");
 200     UsbCommand c;
 201     bzero(&c, sizeof(c));
 202
 203     if ((state & DEVICE_INFO_FLAG_BOOTROM_PRESENT) && (state & DEVICE_INFO_FLAG_OSIMAGE_PRESENT)) {
 204       /* New style handover: Send CMD_START_FLASH, which will reset the board and
 205        * enter the bootrom on the next boot.
 206       */
 207       c.cmd = CMD_START_FLASH;
 208       SendCommand(&c);
 209       fprintf(stderr,"(You don't have to do anything. Press and release the button only if you want to abort)\n");
 210       fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 211     } else {
 212       /* Old style handover: Ask the user to press the button, then reset the board */
 213       c.cmd = CMD_HARDWARE_RESET;
 214       SendCommand(&c);
 215       fprintf(stderr,"(Press and hold down button NOW if your bootloader requires it)\n");
 216       fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 217     }
 218
 219 #ifdef WIN32
 220     Sleep(1000);
 221     while (!UsbConnect()) { Sleep(1000); }
 222 #else
 223     CloseProxmark();
 224     sleep(1);
 225
 226     while (!OpenProxmark(0)) { sleep(1); }
 227 #endif
 228     fprintf(stderr,"Found.\n");
 229
 230     return GetProxmarkState();
 231   }
 232
 233   return 0;
 234 }
 235
 236 /* On first call, have *offset = -1, *length = 0; */
 237 int find_next_area(const char *str, int *offset, int *length)
 238 {
 239   if (*str == '\0') return 0;
 240   if ((*offset >= 0) && str[*offset + *length] == '\0') return 0;
 241   *offset += 1 + *length;
 242
 243   char *next_comma = strchr(str + *offset, ',');
 244   if (next_comma == NULL) {
 245     *length = strlen(str) - *offset;
 246   } else {
 247     *length = next_comma-(str+*offset);
 248   }
 249   return 1;
 250 }
 251
 252 void do_flash(char **argv)
 253 {
 254   unsigned int state = EnterFlashState();
 255
 256   if (!(state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM)) {
 257     fprintf(stderr, "Proxmark would not enter flash state, abort\n");
 258     exit(-1);
 259   }
 260
 261   int offset=-1, length=0;
 262   int current_area = 0;
 263   while (find_next_area(argv[1], &offset, &length)) {
 264     struct partition *p = NULL;
 265     for (int i = 0; i<sizeof(partitions)/sizeof(partitions[0]); ++i) {
 266       if (strncmp(partitions[i].name, argv[1] + offset, length) == 0) {
 267         /* Check if the name matches the bootrom partition, and if so, require "bootrom" to
 268          * be written in full. The other names may be abbreviated.
 269         */
 270         if(!partitions[i].precious || (strlen(partitions[i].name) == length))
 271           p = &partitions[i];
 272         break;
 273       }
 274     }
 275
 276     if (p == NULL) {
 277       fprintf(stderr, "Warning: area name '");
 278       fwrite(argv[1]+offset, length, 1, stderr);
 279       fprintf(stderr, "' unknown, ignored\n");
 280     } else {
 281       fprintf(stderr, "Flashing %s from %s\n", p->name, argv[2+current_area]);
 282       PrepareFlash(p, argv[2+current_area], state);
 283     }
 284     current_area++;
 285   }
 286 }