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

   1 #ifdef WIN32
   2 #include <windows.h>
   3 #include <setupapi.h>
   4 #include <ctype.h>
   5 #define bzero(b,len) (memset((b), '\0', (len)), (void) 0)
   6 BOOL UsbConnect(void);
   7 #else
   8 #include <usb.h>
   9 #endif
  10 #include <stdio.h>
  11 #include <unistd.h>
  12 #include <stdlib.h>
  13 #include <stdint.h>
  14 #include <stdbool.h>
  15 #include <strings.h>
  16 #include <string.h>
  17 #include <errno.h>
  18 #include <ctype.h>
  19
  20 #include "prox.h"
  21 #ifndef WIN32
  22 #include "proxmark3.h"
  23 #endif
  24 #include "flash.h"
  25 #include "elf.h"
  26
  27 static uint32_t ExpectedAddr;
  28 static uint8_t QueuedToSend[256];
  29 static bool AllWritten;
  30 #define PHYSICAL_FLASH_START 0x100000
  31 #define PHYSICAL_FLASH_END   0x200000
  32
  33 void WaitForAck(void) {
  34         UsbCommand ack;
  35         ReceiveCommand(&ack);
  36         if(ack.cmd != CMD_ACK) {
  37                 printf("bad ACK\n");
  38                 exit(-1);
  39         }
  40 }
  41
  42 struct partition partitions[] = {
  43                 {0x100000, 0x102000, 1, "bootrom"},
  44                 {0x102000, 0x110000, 0, "fpga"},
  45                 {0x110000, 0x140000, 0, "os"},
  46                 {0, 0, 0, NULL},
  47 };
  48
  49 void WriteBlock(unsigned int block_start, unsigned int len, unsigned char *buf)
  50 {
  51         unsigned char temp_buf[256];
  52         if (block_start & 0xFF) {
  53                 printf("moving stuff forward by %d bytes\n", block_start & 0xFF);
  54                 memset(temp_buf, 0xFF, block_start & 0xFF);
  55                 memcpy(temp_buf + (block_start & 0xFF), buf, len);
  56                 block_start &= ~0xFF;
  57         } else memcpy(temp_buf, buf, len);
  58
  59         UsbCommand c = {CMD_SETUP_WRITE};
  60
  61         int i;
  62         for(i = 0; i < 240; i += 48) {
  63                 memcpy(c.d.asBytes, temp_buf+i, 48);
  64                 c.arg[0] = (i/4);
  65                 SendCommand(&c);
  66                 WaitForAck();
  67         }
  68
  69         c.cmd = CMD_FINISH_WRITE;
  70         c.arg[0] = block_start;
  71
  72 //      printf("writing block %08x\r", c.arg[0]);
  73         memcpy(c.d.asBytes, temp_buf+240, 16);
  74         SendCommand(&c);
  75         WaitForAck();
  76
  77         AllWritten = true;
  78 }
  79
  80 void LoadFlashFromFile(const char *file, int start_addr, int end_addr)
  81 {
  82         FILE *f = fopen(file, "rb");
  83         if(!f) {
  84                 printf("couldn't open file\n");
  85                 exit(-1);
  86         }
  87
  88         char buf[4];
  89         fread(buf, 1, 4, f);
  90         if (memcmp(buf, "\x7F" "ELF", 4) == 0) {
  91                 int i;
  92                 fseek(f, 0, SEEK_SET);
  93                 Elf32_Ehdr header;
  94                 fread(&header, 1, sizeof(header), f);
  95                 int count = header.e_phnum;
  96                 printf("count=%d phoff=%x\n", count, header.e_phoff);
  97                 Elf32_Phdr phdr;
  98
  99                 for (i=0; i<header.e_phnum; i++) {
 100                         fseek(f, header.e_phoff + i * sizeof(Elf32_Phdr), SEEK_SET);
 101                         fread(&phdr, 1, sizeof(phdr), f);
 102                         printf("type=%d offset=%x paddr=%x vaddr=%x filesize=%x memsize=%x flags=%x align=%x\n",
 103                                 phdr.p_type, phdr.p_offset, phdr.p_paddr, phdr.p_vaddr, phdr.p_filesz, phdr.p_memsz, phdr.p_flags, phdr.p_align);
 104                         if (phdr.p_type == PT_LOAD && phdr.p_filesz > 0 && phdr.p_paddr >= PHYSICAL_FLASH_START
 105                                 && (phdr.p_paddr + phdr.p_filesz) < PHYSICAL_FLASH_END) {
 106                                 printf("flashing offset=%x paddr=%x size=%x\n", phdr.p_offset, phdr.p_paddr, phdr.p_filesz);
 107                                 if (phdr.p_offset == 0) {
 108                                         printf("skipping forward 0x2000 because of strange linker thing\n");
 109                                         phdr.p_offset += 0x2000;
 110                                         phdr.p_paddr += 0x2000;
 111                                         phdr.p_filesz -= 0x2000;
 112                                         phdr.p_memsz -= 0x2000;
 113                                 }
 114
 115                                 fseek(f, phdr.p_offset, SEEK_SET);
 116                                 ExpectedAddr = phdr.p_paddr;
 117                                 while (ExpectedAddr < (phdr.p_paddr + phdr.p_filesz)) {
 118                                         unsigned int bytes_to_read = phdr.p_paddr + phdr.p_filesz - ExpectedAddr;
 119                                         if (bytes_to_read > 256)
 120                                                 bytes_to_read=256;
 121                                         else
 122                                                 memset(QueuedToSend, 0xFF, 256);
 123                                         fread(QueuedToSend, 1, bytes_to_read, f);
 124                                         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,
 125                                                         QueuedToSend[0], QueuedToSend[1], QueuedToSend[2], QueuedToSend[3],
 126                                                         QueuedToSend[4], QueuedToSend[5], QueuedToSend[6], QueuedToSend[7],
 127                                                         QueuedToSend[248], QueuedToSend[249], QueuedToSend[250], QueuedToSend[251],
 128                                                         QueuedToSend[252], QueuedToSend[253], QueuedToSend[254], QueuedToSend[255]);
 129                                         WriteBlock(ExpectedAddr, 256, QueuedToSend);
 130                                         ExpectedAddr += bytes_to_read;
 131                                 }
 132             }
 133         }
 134
 135                 fclose(f);
 136                 printf("\ndone.\n");
 137                 return;
 138         } else printf("Bad file format\n");
 139 }
 140
 141 int PrepareFlash(struct partition *p, const char *filename, unsigned int state)
 142 {
 143         if(state & DEVICE_INFO_FLAG_UNDERSTANDS_START_FLASH) {
 144                 UsbCommand c = {CMD_START_FLASH, {p->start, p->end, 0}};
 145
 146                 /* Only send magic when flashing bootrom */
 147                 if(p->precious)
 148                         c.arg[2] = START_FLASH_MAGIC;
 149                 else
 150                         c.arg[2] = 0;
 151
 152                 SendCommand(&c);
 153                 WaitForAck();
 154         } else {
 155                 fprintf(stderr, "Warning: Your bootloader does not understand the new START_FLASH command\n");
 156                 fprintf(stderr, "         It is recommended that you update your bootloader\n\n");
 157                 exit(0);
 158         }
 159
 160         LoadFlashFromFile(filename, p->start, p->end);
 161         return 1;
 162 }
 163
 164 unsigned int GetProxmarkState(void)
 165 {
 166         unsigned int state = 0;
 167
 168         UsbCommand c;
 169         c.cmd = CMD_DEVICE_INFO;
 170         SendCommand(&c);
 171
 172         UsbCommand resp;
 173         ReceiveCommand(&resp);
 174         /* Three cases:
 175          * 1. The old bootrom code will ignore CMD_DEVICE_INFO, but respond with an ACK
 176          * 2. The old os code will respond with CMD_DEBUG_PRINT_STRING and "unknown command"
 177          * 3. The new bootrom and os codes will respond with CMD_DEVICE_INFO and flags
 178          */
 179
 180         switch(resp.cmd) {
 181         case CMD_ACK:
 182                 state = DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM;
 183                 break;
 184         case CMD_DEBUG_PRINT_STRING:
 185                 state = DEVICE_INFO_FLAG_CURRENT_MODE_OS;
 186                 break;
 187         case CMD_DEVICE_INFO:
 188                 state = resp.arg[0];
 189                 break;
 190         default:
 191                 fprintf(stderr, "Couldn't get proxmark state, bad response type: 0x%04X\n", resp.cmd);
 192                 exit(-1);
 193                 break;
 194         }
 195
 196         return state;
 197 }
 198
 199 unsigned int EnterFlashState(void)
 200 {
 201         unsigned int state = GetProxmarkState();
 202
 203         if(state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM) {
 204                 /* Already in flash state, we're done. */
 205                 return state;
 206         }
 207
 208         if(state & DEVICE_INFO_FLAG_CURRENT_MODE_OS) {
 209                 fprintf(stderr,"Entering flash-mode...\n");
 210                 UsbCommand c;
 211                 bzero(&c, sizeof(c));
 212
 213                 if( (state & DEVICE_INFO_FLAG_BOOTROM_PRESENT) && (state & DEVICE_INFO_FLAG_OSIMAGE_PRESENT) ) {
 214                         /* New style handover: Send CMD_START_FLASH, which will reset the board and
 215                          * enter the bootrom on the next boot.
 216                          */
 217                         c.cmd = CMD_START_FLASH;
 218                         SendCommand(&c);
 219                         fprintf(stderr,"(You don't have to do anything. Press and release the button only if you want to abort)\n");
 220                         fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 221                 } else {
 222                         /* Old style handover: Ask the user to press the button, then reset the board */
 223                         c.cmd = CMD_HARDWARE_RESET;
 224                         SendCommand(&c);
 225                         fprintf(stderr,"(Press and hold down button NOW if your bootloader requires it)\n");
 226                         fprintf(stderr,"Waiting for Proxmark to reappear on USB... ");
 227                 }
 228
 229 #ifdef WIN32
 230                 Sleep(1000);
 231                 while(!UsbConnect()) { Sleep(1000); }
 232 #else
 233                 CloseProxmark();
 234                 sleep(1);
 235
 236                 while(!(devh=OpenProxmark(0))) { sleep(1); }
 237 #endif
 238                 fprintf(stderr,"Found.\n");
 239
 240                 return GetProxmarkState();
 241         }
 242
 243         return 0;
 244 }
 245
 246 /* On first call, have *offset = -1, *length = 0; */
 247 int find_next_area(const char *str, int *offset, int *length)
 248 {
 249         if(*str == '\0') return 0;
 250         if((*offset >= 0) && str[*offset + *length] == '\0') return 0;
 251         *offset += 1 + *length;
 252
 253         char *next_comma = strchr(str + *offset, ',');
 254         if(next_comma == NULL) {
 255                 *length = strlen(str) - *offset;
 256         } else {
 257                 *length = next_comma-(str+*offset);
 258         }
 259         return 1;
 260 }
 261
 262 void do_flash(char **argv) {
 263         unsigned int state = EnterFlashState();
 264
 265         if (!(state & DEVICE_INFO_FLAG_CURRENT_MODE_BOOTROM)) {
 266                 fprintf(stderr, "Proxmark would not enter flash state, abort\n");
 267                 exit(-1);
 268         }
 269
 270         int offset=-1, length=0;
 271         int current_area = 0;
 272         while(find_next_area(argv[1], &offset, &length)) {
 273                 int i;
 274                 struct partition *p = NULL;
 275                 for (i=0; i<sizeof(partitions)/sizeof(partitions[0]); i++) {
 276                         if (strncmp(partitions[i].name, argv[1] + offset, length) == 0) {
 277                                 /* Check if the name matches the bootrom partition, and if so, require "bootrom" to
 278                                 * be written in full. The other names may be abbreviated.
 279                                 */
 280                                 if(!partitions[i].precious || (strlen(partitions[i].name) == length))
 281                                         p = &partitions[i];
 282                                 break;
 283                         }
 284                 }
 285
 286                 if(p == NULL) {
 287                         fprintf(stderr, "Warning: area name '");
 288                         fwrite(argv[1]+offset, length, 1, stderr);
 289                         fprintf(stderr, "' unknown, ignored\n");
 290                 } else {
 291                         fprintf(stderr, "Flashing %s from %s\n", p->name, argv[2+current_area]);
 292                         PrepareFlash(p, argv[2+current_area], state);
 293                 }
 294                 current_area++;
 295         }
 296 }