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