root/platform/a4000/sub/101b/boot.c

DEFINITIONS

1. taskHook
2. boot
3. sub_FF810380_my
4. sub_FF8111D8_my
5. sub_FF814278_my
6. sub_FF81A698_my
7. taskcreate_Startup_my
8. task_Startup_my
9. taskcreatePhySw_my
10. CreateTask_spytask
11. init_file_modules_task

   1 #include "lolevel.h"
   2 #include "platform.h"
   3 #include "core.h"
   4 #include "dryos31.h"
   5 #define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
   7 const char * const new_sa = &_end;
   9 void CreateTask_PhySw();
  10 void CreateTask_spytask();
  12 extern void task_CaptSeq();
  13 extern void task_InitFileModules();
  14 extern void task_MovieRecord();
  15 extern void task_ExpDrv();
  16 extern void task_PhySw();
  17 extern void task_FileWrite();
  19 void taskHook(context_t **context) {
task_t *tcb=(task_t*)((char*)context-offsetof(task_t, context));
  23     if(tcb->entry == (void*)task_PhySw)            tcb->entry = (void*)mykbd_task;
  24     if(tcb->entry == (void*)task_CaptSeq)          tcb->entry = (void*)capt_seq_task;
  25     if(tcb->entry == (void*)task_InitFileModules)  tcb->entry = (void*)init_file_modules_task;
  26     if(tcb->entry == (void*)task_MovieRecord)      tcb->entry = (void*)movie_record_task;
  27     if(tcb->entry == (void*)task_ExpDrv)           tcb->entry = (void*)exp_drv_task;
  28     if(tcb->entry == (void*)task_FileWrite)        tcb->entry = (void*)filewritetask;
  29 }
  31 //#define LED_GREEN             0xC0220120
  33 //** boot  @ 0xFF81000C 
  35 void __attribute__((naked,noinline)) boot(  ) { 
  36 asm volatile (
  37       "LDR     R1, =0xC0410000\n"
  38       "MOV     R0, #0\n"
  39       "STR     R0, [R1]\n"
  40       "MOV     R1, #0x78\n"
  41       "MCR     p15, 0, R1, c1, c0\n"
  42       "MOV     R1, #0\n"
  43       "MCR     p15, 0, R1, c7, c10, 4\n"
  44       "MCR     p15, 0, R1, c7, c5\n"
  45       "MCR     p15, 0, R1, c7, c6\n"
  46       "MOV     R0, #0x3D\n"
  47       "MCR     p15, 0, R0, c6, c0\n"
  48       "MOV     R0, #0xC000002F\n"
  49       "MCR     p15, 0, R0, c6, c1\n"
  50       "MOV     R0, #0x33\n"
  51       "MCR     p15, 0, R0, c6, c2\n"
  52       "MOV     R0, #0x40000033\n"
  53       "MCR     p15, 0, R0, c6, c3\n"
  54       "MOV     R0, #0x80000017\n"
  55       "MCR     p15, 0, R0, c6, c4\n"
  56       "LDR     R0, =0xFF80002D\n"
  57       "MCR     p15, 0, R0, c6, c5\n"
  58       "MOV     R0, #0x34\n"
  59       "MCR     p15, 0, R0, c2, c0\n"
  60       "MOV     R0, #0x34\n"
  61       "MCR     p15, 0, R0, c2, c0, 1\n"
  62       "MOV     R0, #0x34\n"
  63       "MCR     p15, 0, R0, c3, c0\n"
  64       "LDR     R0, =0x3333330\n"
  65       "MCR     p15, 0, R0, c5, c0, 2\n"
  66       "LDR     R0, =0x3333330\n"
  67       "MCR     p15, 0, R0, c5, c0, 3\n"
  68       "MRC     p15, 0, R0, c1, c0\n"
  69       "ORR     R0, R0, #0x1000\n"
  70       "ORR     R0, R0, #4\n"
  71       "ORR     R0, R0, #1\n"
  72       "MCR     p15, 0, R0, c1, c0\n"
  73       "MOV     R1, #0x80000006\n"
  74       "MCR     p15, 0, R1, c9, c1\n"
  75       "MOV     R1, #6\n"
  76       "MCR     p15, 0, R1, c9, c1, 1\n"
  77       "MRC     p15, 0, R1, c1, c0\n"
  78       "ORR     R1, R1, #0x50000\n"
  79       "MCR     p15, 0, R1, c1, c0\n"
  80       "LDR     R2, =0xC0200000\n"
  81       "MOV     R1, #1\n"
  82       "STR     R1, [R2, #0x10C]\n"
  83       "MOV     R1, #0xFF\n"
  84       "STR     R1, [R2, #0xC]\n"
  85       "STR     R1, [R2, #0x1C]\n"
  86       "STR     R1, [R2, #0x2C]\n"
  87       "STR     R1, [R2, #0x3C]\n"
  88       "STR     R1, [R2, #0x4C]\n"
  89       "STR     R1, [R2, #0x5C]\n"
  90       "STR     R1, [R2, #0x6C]\n"
  91       "STR     R1, [R2, #0x7C]\n"
  92       "STR     R1, [R2, #0x8C]\n"
  93       "STR     R1, [R2, #0x9C]\n"
  94       "STR     R1, [R2, #0xAC]\n"
  95       "STR     R1, [R2, #0xBC]\n"
  96       "STR     R1, [R2, #0xCC]\n"
  97       "STR     R1, [R2, #0xDC]\n"
  98       "STR     R1, [R2, #0xEC]\n"
  99       "STR     R1, [R2, #0xFC]\n"
 100       "LDR     R1, =0xC0400008\n"
 101       "LDR     R2, =0x430005\n"
 102       "STR     R2, [R1]\n"
 103       "MOV     R1, #1\n"
 104       "LDR     R2, =0xC0243100\n"
 105       "STR     R2, [R1]\n"
 106       "LDR     R2, =0xC0242010\n"
 107       "LDR     R1, [R2]\n"
 108       "ORR     R1, R1, #1\n"
 109       "STR     R1, [R2]\n"
 110       "LDR     R0, =0xFFC06164\n"
 111       "LDR     R1, =0x3F1000\n"
 112       "LDR     R3, =0x4005D4\n"
 113 "loc_FF81013C:\n"
 114       "CMP     R1, R3\n"
 115       "LDRCC   R2, [R0], #4\n"
 116       "STRCC   R2, [R1], #4\n"
 117       "BCC     loc_FF81013C\n"
 118       "LDR     R0, =0xFFBFA7C8\n"
 119       "LDR     R1, =0x1900\n"
 120       "LDR     R3, =0xD29C\n"
 121 "loc_FF810158:\n"
 122       "CMP     R1, R3\n"
 123       "LDRCC   R2, [R0], #4\n"
 124       "STRCC   R2, [R1], #4\n"
 125       "BCC     loc_FF810158\n"
 126       "LDR     R1, =0x157CA4 \n" //MEMISOSTART
 127       "MOV     R2, #0\n"
 128 "loc_FF810170:\n"
 129       "CMP     R3, R1\n"
 130       "STRCC   R2, [R3], #4\n"
 131       "BCC     loc_FF810170\n"
 132 //      "B       sub_FF810380\n" //original
 133       "B       sub_FF810380_my \n" //patched
 134         );
 135 }
 138 //** sub_FF810380_my  @ 0xFF810380 
 140 void __attribute__((naked,noinline)) sub_FF810380_my(  ) { 
 142    //http://chdk.setepontos.com/index.php/topic,4194.0.html
 143    *(int*)0x1934=(int)taskHook;
 144    *(int*)0x1938=(int)taskHook;
 146     // Power Button detection (short press = playback mode, long press = record mode) 
 147         // C0220048  a4000.100c ??
 148     // C02200F8  a4000.100c sub_ff81a6ac : C0220000 (@ff81a6b4) + 0xF8 (@ff81a6fc)
 149     // 0x24B0    a4000.100c loc_ff856420
 150     if ((*(int*) 0xC02200F8) & 1)                 // look at power-on switch
 151             *(int*)(0x24B0+4) = 0x200000;         // start in play mode
 152     else
 153             *(int*)(0x24B0+4) = 0x100000;         // start in rec mode    
 155 asm volatile (
 156       "LDR     R0, =0xFF8103F8\n"
 157       "MOV     R1, #0\n"
 158       "LDR     R3, =0xFF810430\n"
 159 "loc_FF81038C:\n"
 160       "CMP     R0, R3\n"
 161       "LDRCC   R2, [R0], #4\n"
 162       "STRCC   R2, [R1], #4\n"
 163       "BCC     loc_FF81038C\n"
 164       "LDR     R0, =0xFF810430\n"
 165       "MOV     R1, #0x4B0\n"
 166       "LDR     R3, =0xFF810644\n"
 167 "loc_FF8103A8:\n"
 168       "CMP     R0, R3\n"
 169       "LDRCC   R2, [R0], #4\n"
 170       "STRCC   R2, [R1], #4\n"
 171       "BCC     loc_FF8103A8\n"
 172       "MOV     R0, #0xD2\n"
 173       "MSR     CPSR_cxsf, R0\n"
 174       "MOV     SP, #0x1000\n"
 175       "MOV     R0, #0xD3\n"
 176       "MSR     CPSR_cxsf, R0\n"
 177       "MOV     SP, #0x1000\n"
 178       "LDR     R0, =0x6C4\n"
 179       "LDR     R2, =0xEEEEEEEE\n"
 180       "MOV     R3, #0x1000\n"
 181 "loc_FF8103DC:\n"
 182       "CMP     R0, R3\n"
 183       "STRCC   R2, [R0], #4\n"
 184       "BCC     loc_FF8103DC\n"
 185 //      "BL      sub_FF8111D8 \n" //original
 186       "BL      sub_FF8111D8_my \n" //patched
 187         );
 188 }
 191 //** sub_FF8111D8_my  @ 0xFF8111D8 
 193 void __attribute__((naked,noinline)) sub_FF8111D8_my(  ) { 
 194 asm volatile (
 195       "STR     LR, [SP, #-4]!\n"
 196       "SUB     SP, SP, #0x74\n"
 197       "MOV     R1, #0x74\n"
 198       "MOV     R0, SP\n"
 199       "BL      sub_003FC448\n"
 200       "MOV     R0, #0x57000\n"
 201       "STR     R0, [SP, #4]\n"
 202 #if defined(CHDK_NOT_IN_CANON_HEAP)
 203       "LDR     R0, =0x157CA4 \n" // MEMISOSTART: Use original heap offset since CHDK is loaded in high memory 
 204 #else
 205       "LDR     R0, =new_sa \n"      //otherwise use patched value
 206       "LDR     R0, [R0] \n"
 207 #endif
 208       "LDR     R2, =0x2ED440\n"
 209       "STR     R0, [SP, #8]\n"
 210       "SUB     R0, R2, R0\n"
 211       "STR     R0, [SP, #0xC]\n"
 212       "MOV     R0, #0x22\n"
 213       "STR     R0, [SP, #0x18]\n"
 214       "MOV     R0, #0x7C\n"
 215       "STR     R0, [SP, #0x1C]\n"
 216       "LDR     R1, =0x2F5C00\n"
 217       "LDR     R0, =0x1CD\n"
 218       "STR     R1, [SP]\n"
 219       "STR     R0, [SP, #0x20]\n"
 220       "MOV     R0, #0x96\n"
 221       "STR     R2, [SP, #0x10]\n"
 222       "STR     R1, [SP, #0x14]\n"
 223       "STR     R0, [SP, #0x24]\n"
 224       "STR     R0, [SP, #0x28]\n"
 225       "MOV     R0, #0x64\n"
 226       "STR     R0, [SP, #0x2C]\n"
 227       "MOV     R0, #0\n"
 228       "STR     R0, [SP, #0x30]\n"
 229       "STR     R0, [SP, #0x34]\n"
 230       "MOV     R0, #0x10\n"
 231       "STR     R0, [SP, #0x5C]\n"
 232       "MOV     R0, #0x800\n"
 233       "STR     R0, [SP, #0x60]\n"
 234       "MOV     R0, #0xA0\n"
 235       "STR     R0, [SP, #0x64]\n"
 236       "MOV     R0, #0x280\n"
 237       "STR     R0, [SP, #0x68]\n"
 238 //      "LDR     R1, =0xFF814278 \n" //original
 239       "LDR     R1, =sub_FF814278_my \n" //patched
 240       "MOV     R2, #0\n"
 241       "MOV     R0, SP\n"
 242       "BL      sub_003F2778\n"
 243       "ADD     SP, SP, #0x74\n"
 244       "LDR     PC, [SP], #4\n"
 245         );
 246 }
 249 //** sub_FF814278_my  @ 0xFF814278 
 251 void __attribute__((naked,noinline)) sub_FF814278_my(  ) { 
 252 asm volatile (
 253       "STMFD   SP!, {R4,LR}\n"
 254       "BL      sub_FF810B50\n"
 255       "BL      sub_FF815164\n"
 256       "CMP     R0, #0\n"
 257       "LDRLT   R0, =0xFF81438C\n"
 258       "BLLT    _err_init_task \n"
 259       "BL      sub_FF813EB0\n"
 260       "CMP     R0, #0\n"
 261       "LDRLT   R0, =0xFF814394 \n" // "termDriverInit"
 262       "BLLT    _err_init_task \n"
 263       "LDR     R0, =0xFF8143A4 \n" // "/_term"
 264       "BL      sub_FF813F98\n"
 265       "CMP     R0, #0\n"
 266       "LDRLT   R0, =0xFF8143AC \n" // "termDeviceCreate"
 267       "BLLT    _err_init_task \n"
 268       "LDR     R0, =0xFF8143A4 \n" //  "/_term"
 269       "BL      sub_FF8129B8\n"
 270       "CMP     R0, #0\n"
 271       "LDRLT   R0, =0xFF8143C0 \n" // "stdioSetup"
 272       "BLLT    _err_init_task \n"
 273       "BL      sub_FF814B00\n"
 274       "CMP     R0, #0\n"
 275       "LDRLT   R0, =0xFF8143CC \n" // "stdlibSetup"
 276       "BLLT    _err_init_task \n"
 277       "BL      sub_FF8116B8\n"
 278       "CMP     R0, #0\n"
 279       "LDRLT   R0, =0xFF8143D8 \n" // "armlib_setup"
 280       "BLLT    _err_init_task \n"
 281       "LDMFD   SP!, {R4,LR}\n"
 282 //      "B       sub_FF81A698 \n" //original
 283       "B       sub_FF81A698_my \n" //patched
 284         );
 285 }
 288 //** sub_FF81A698_my  @ 0xFF81A698 
 290 void __attribute__((naked,noinline)) sub_FF81A698_my(  ) { 
 291 asm volatile (
 292       "STMFD   SP!, {R4,LR}\n"
 293       "BL      sub_FF82EAD8\n"
 294 //      "BL      loc_FF81A6AC \n" // original taskcreate_Startup
 295       "BL      taskcreate_Startup_my \n" //patched taskcreate_Startup
 296       "MOV     R0, #0\n"
 297       "LDMFD   SP!, {R4,PC}\n"
 298         );
 299 }
 302 //** taskcreate_Startup_my  @ 0xFF81A6AC 
 304 void __attribute__((naked,noinline)) taskcreate_Startup_my(  ) { 
 305 asm volatile (
 306       "STMFD   SP!, {R3-R7,LR}\n"
 307       "BL      sub_FF835B84\n"
 308       "LDR     R6, =0xC0220000\n"
 309       "MOVS    R4, R0\n"
 310       "MOV     R5, #1\n"
 311       "BNE     loc_FF81A6FC\n"
 312       "BL      sub_FF830534\n"
 313       "CMP     R0, #0\n"
 314       "BEQ     loc_FF81A6FC\n"
 315       "LDR     R0, [R6, #0xFC]\n"
 316       "BIC     R1, R5, R0\n"
 317       "LDR     R0, [R6, #0xF8]\n"
 318       "BIC     R0, R5, R0\n"
 319       "ORRS    R2, R0, R1\n"
 320       "BNE     loc_FF81A70C\n"
 321       "BL      sub_FF82E1A4\n"
 322       "MOV     R0, #0x44\n"
 323       "STR     R0, [R6, #0x12C]\n"
 324       "BL      sub_FF82E2B4\n"
 325 "loc_FF81A6F8:\n"
 326       "B       loc_FF81A6F8\n"
 327 "loc_FF81A6FC:\n"
 328       "LDR     R0, [R6, #0xF8]\n"
 329       "LDR     R1, [R6, #0xFC]\n"
 330       "BIC     R0, R5, R0\n"
 331       "BIC     R1, R5, R1\n"
 332 "loc_FF81A70C:\n"
 333       "MOV     R3, #0\n"
 334       "MOV     R2, R4\n"
 335 //      "BL      sub_FF82EAE0 \n" // StartUp mode detection. We must remove this for power-on mode handling to work
 336       "BL      sub_FF82EADC\n"
 337       "BL      sub_003F77E0\n"
 338       "LDR     R1, =0x34E000\n"
 339       "MOV     R0, #0\n"
 340       "BL      sub_FF8341C0\n"
 341       "BL      sub_003F79F8\n"
 342       "MOV     R3, #0\n"
 343       "STR     R3, [SP]\n"
 344 //      "LDR     R3, =0xFF81A628 \n" //original
 345       "LDR     R3, =task_Startup_my \n" //patched
 346       "MOV     R2, #0\n"
 347       "MOV     R1, #0x19\n"
 348       "LDR     R0, =0xFF81A760\n"
 349       "BL      _CreateTask \n"
 350       "MOV     R0, #0\n"
 351       "LDMFD   SP!, {R3-R7,PC}\n"
 352         );
 353 }
 356 //** task_Startup_my  @ 0xFF81A628 
 358 void __attribute__((naked,noinline)) task_Startup_my(  ) { 
 359 asm volatile (
 360       "STMFD   SP!, {R4,LR}\n"
 361       "BL      sub_FF8148B8\n"
 362       "BL      sub_FF82FC00\n"
 363       "BL      sub_FF82DE4C\n"
 364       "BL      sub_FF835BCC\n"
 365       "BL      sub_FF835DB8\n"
 366       "BL      sub_FF82CC48\n"
 367       "BL      sub_FF82D810\n"
 368 //      "BL      sub_FF835C60 \n" //disable Diskboot.bin
 369       "BL      sub_FF835F34\n"
 370       "BL      sub_FF836100\n"
 371       "BL      sub_FF835EF8\n"
 372       "BL      sub_FF835DE8\n"
 373       "BL      sub_FF8340F4\n"
 374       "BL      sub_FF836108\n"
 375       "BL     CreateTask_spytask \n"            //added to create the Spytask
 376 //      "BL      sub_FF82E97C \n" //original taskcreate_PhySw()
 377       "BL     taskcreatePhySw_my \n"            // patched taskcreate_PhySw()
 378       "BL      sub_FF83235C\n"
 379       "BL      sub_FF836120\n"
 380       "BL      sub_FF82B9C8\n"
 381       "BL      sub_FF82C510\n"
 382       "BL      sub_FF835940\n"
 383       "BL      sub_FF82CB38\n"
 384       "BL      sub_FF82C4AC\n"
 385       "BL      sub_FF835F24\n"
 386       "BL      sub_FF836C78 \n" //StartFactoryModeController
 387       "BL      sub_FF82C470\n"
 388       "LDMFD   SP!, {R4,LR}\n"
 389       "B       sub_FF8149D8\n"
 390         );
 391 }
 394 //** taskcreatePhySw_my  @ 0xFF82E97C 
 396 void __attribute__((naked,noinline)) taskcreatePhySw_my(  ) { 
 397 asm volatile (
 398       "STMFD   SP!, {R3-R5,LR}\n"
 399       "LDR     R4, =0x1C18\n"
 400       "LDR     R0, [R4, #4]\n"
 401       "CMP     R0, #0\n"
 402       "BNE     loc_FF82E9B0\n"
 403       "MOV     R3, #0\n"
 404       "STR     R3, [SP]\n"
 405 //      "LDR     R3, =0xFF82E948 \n" //original
 406       "LDR     R3, =task_PhySw \n"   //patched  task_PhySw
 407 //      "MOV     R2, #0x800 \n"      // original  
 408       "MOV     R2, #0x2000 \n" // stack size for new task_PhySw so we don't have to do stack switch
 409       "MOV     R1, #0x17\n"
 410       "LDR     R0, =0xFF82EBD8\n"
 411       "BL      sub_003F7A50\n"
 412       "STR     R0, [R4, #4]\n"
 413 "loc_FF82E9B0:\n"
 414       "BL      sub_FF87EE60\n"
 415       "BL      sub_FF830484\n"
 416       "CMP     R0, #0\n"
 417       "BNE     loc_FF82E9CC\n"
 418       "LDR     R1, =0x3129C\n"
 419       "MOV     R0, #0\n"
 420       "BL      sub_FF87EDD0\n"
 421 "loc_FF82E9CC:\n"
 422       "LDMFD   SP!, {R3-R5,PC}\n"
 423         );
 424 }
 426 void CreateTask_spytask() {
_CreateTask("SpyTask", 0x19, 0x2000, core_spytask, 0);                        
 429 };
 432 //** init_file_modules_task  @ 0xFF88895C 
 434 void __attribute__((naked,noinline)) init_file_modules_task(  ) { 
 435 asm volatile (
 436       "STMFD   SP!, {R4-R6,LR}\n"
 437       "BL      sub_FF8813CC\n"
 438       "LDR     R5, =0x5006\n"
 439       "MOVS    R4, R0\n"
 440       "MOVNE   R1, #0\n"
 441       "MOVNE   R0, R5\n"
 442       "BLNE    _PostLogicalEventToUI \n"
 443       "BL      sub_FF8813F8\n"
 444       "BL          core_spytask_can_start \n" //added CHDK: Set "it's-safe-to-start"-Flag for spytask
 445       "CMP     R4, #0\n"
 446       "LDMNEFD SP!, {R4-R6,PC}\n"
 447       "MOV     R0, R5\n"
 448       "LDMFD   SP!, {R4-R6,LR}\n"
 449       "MOV     R1, #0\n"
 450       "B       _PostLogicalEventToUI \n"
 451         );
 452 }