root/platform/g16/sub/100h/boot.c

DEFINITIONS

1. spytask
2. CreateTask_spytask
3. xblinker
4. blinker
5. CreateTask_blinker
6. boot
7. CreateTask_my
8. sub_fc05e00c_my
9. sub_fc05e19d_my
10. sub_fc05e5a2_my
11. sub_fc070e98_my
12. task_Startup_my
13. sub_fc070d8a_my
14. init_file_modules_task
15. kbd_p2_f_my
16. sub_fc07147a_my

   1 #include "lolevel.h"
   2 #include "platform.h"
   3 #include "core.h"
   4 #include "dryos31.h"
   5 #include "gui_draw.h"
   6 #include "asmsafe.h"
   8 #define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
  10 const char * const new_sa = &_end;
  11 extern volatile int jogdial_stopped;
  13 // Forward declarations
  15 extern void task_CaptSeq();
  16 extern void task_InitFileModules();
  17 extern void task_RotaryEncoder();
  18 extern void task_MovieRecord();
  19 extern void task_ExpDrv();
  21 void JogDial_task_my(void);
  24 /*----------------------------------------------------------------------
  25     spytask
  26 -----------------------------------------------------------------------*/
  27 void spytask(long ua, long ub, long uc, long ud, long ue, long uf)
  28 {
  29     (void)ua; (void)ub; (void)uc; (void)ud; (void)ue; (void)uf;
core_spytask();
  31 }
  33 void CreateTask_spytask()
  34 {
_CreateTask("SpyTask", 0x19, 0x2000, spytask, 0);
  36 }
  38 #ifdef DEBUG_BLINKING
  40     // ASM_SAFE("BL xblinker\n")
  41     #define LED_PR     0xd20b0994       // G16 green LED on OVF bezel   
  42     #define LED_PWR    0xd20b0884       // G16 green LED on power button
  43     #define LED_ORANGE 0xd20b0888       // G16 orange LED on OVF bezel   
  44     #define XDELAY 4000000 
  46     void xblinker() 
  47     {
  48         int j = 2;
  49         while(j-- > 0) {
  50             int i;
  51             *(volatile int*)LED_ORANGE = 0x4d0002;
  52             for(i=0;i<XDELAY/10;i++) {
  53                 asm volatile(
  54                 "nop\n"
  55                 );
  56             }
  57             *(volatile int*)LED_ORANGE = 0x4c0003;
  58             for(i=0;i<XDELAY;i++) {
  59                 asm volatile(
  60                 "nop\n"
  61                 );
  62             }
  63         }
  64     }
  66     /*----------------------------------------------------------------------
  67       blinker
  68     -----------------------------------------------------------------------*/
  70     void draw_pixel_std(unsigned int , unsigned short );
  72     void __attribute__((naked,noinline)) blinker() {
  74         int led_count = 50 ;
  75         unsigned int pxl;
_SleepTask(2000);
  79         while(1)
  80         {
  81             switch led_count
  82             {
  83                 case 3 :
  84                     *(volatile int*)0xd20b0994 = 0x4d0002;
  85                     break ;
  86                 case 2 :
  87                     *(volatile int*)0xd20b0994 = 0x4c0003;
  88                     break ;
  89                 case 1 :
  90                     *(volatile int*)0xd20b0994 = 0x4d0002;
  91                     break ;
  92                 case 0 :
led_count = 21 ;
  94                    *(volatile int*)0xd20b0994 = 0x4c0003;
  96                     for (pxl=0 ; pxl<0x3FFF ; pxl++)
  97                     {
draw_pixel_std(pxl, MAKE_COLOR(COLOR_GREEN,COLOR_GREEN)) ;
  99                     }
 100                     break ;
 101                 default :
 102                     break ;
 103             }
led_count-- ;
_SleepTask(100);
 106         }
 107     };
 109     void CreateTask_blinker() {
_CreateTask("Blinker", 0x1, 0x200, blinker, 0);
 111     };
 112 #endif
 115 /*----------------------------------------------------------------------
 116     boot()
 117 
 118     Main entry point for the CHDK code
 119 -----------------------------------------------------------------------*/
 120 // G16 1.00hgg 0xfc02000d 33
 121 void __attribute__((naked,noinline)) boot() {
 122     asm volatile (
 123 "    ldr.w   sp, =0x80010000\n"
 125     #ifdef DEBUG_BLINKING
ASM_SAFE("BL xblinker\n")
 127     #endif
 129 "    bl      sub_fc020064\n"
 130 "    ldr     r2, =0xc0242010\n"
 131 "    ldr     r1, [r2]\n"
 132 "    orr     r1, r1, #1\n"
 133 "    str     r1, [r2]\n"
 134 "    ldr     r0, =0xfcbebac8\n"   // code copied from ROM to RAM
 135 "    ldr     r1, =0x010c1000\n"   // 
 136 "    ldr     r3, =0x010df4e8\n"   //
 137 "loc_fc020024:\n"
 138 "    cmp     r1, r3\n"
 139 "    itt     lo\n"
 140 "    ldrlo   r2, [r0], #4\n"
 141 "    strlo   r2, [r1], #4\n"
 142 "    blo     loc_fc020024\n"
 144 // Install CreateTask patch
 145 // use half words in case source or destination not word aligned
 146         "adr     r0, patch_CreateTask\n"    // src: Patch data
 147         "ldr     r1, =hook_CreateTask\n"    // dest: Address to patch (hook_ has thumb bit off)
 148         "add     r2, r0, #8\n"              // two words
 149 "task_hook_loop:\n"
 150         "ldrh   r3, [r0],#2\n"
 151         "strh   r3, [r1],#2\n"
 152         "cmp    r0,r2\n"
 153         "blo    task_hook_loop\n"
 155 "    ldr     r0, =0x010c1000\n"
 156 "    ldr     r1, =0x0001e4e8\n"
 157 "    bl      sub_fc13c4d6\n"
 158 "    ldr     r0, =0xfcbc2230\n"
 159 "    ldr     r1, =0x00008000\n"
 160 "    ldr     r3, =0x00031898\n"
 161 "loc_fc020040:\n"
 162 "    cmp     r1, r3\n"
 163 "    itt     lo\n"
 164 "    ldrlo   r2, [r0], #4\n"
 165 "    strlo   r2, [r1], #4\n"
 166 "    blo     loc_fc020040\n"
 167 "    ldr     r3, =0x00031898\n"
 168 "    ldr     r1, =0x003077e0\n"
 169 "    mov.w   r2, #0\n"
 170 "loc_fc020056:\n"
 171 "    cmp     r3, r1\n"
 172 "    it      lo\n"
 173 "    strlo   r2, [r3], #4\n"
 174 "    blo     loc_fc020056\n"
 175 "    b.w     sub_fc05e00c_my\n"   // --->>
 177 "patch_CreateTask:\n"
 178 "    ldr.w   pc, [pc,#0]\n"             // Do jump to absolute address CreateTask_my
 179 "    .long   CreateTask_my + 1\n"       // has to be a thumb address
 180 );
 181 }
 183 void __attribute__((naked,noinline)) CreateTask_my() {
 184     asm volatile (
 185 "    push   {r0}\n"
 187                                         // R3 = Pointer to task function to create
 188 "    ldr     r0, =task_CaptSeq\n"       // DryOS original code function ptr.
 189 "    cmp     r0, r3\n"                  // is the given taskptr equal to our searched function?
 190 "    itt     eq\n"                      // EQ block
 191 "    ldreq   r3, =capt_seq_task\n"      // if so replace with our task function base ptr.
 192 "    orreq   r3, #1\n"                  // make sure it's a thumb address (may not be needed?)
 193 "    beq     exitHook\n"                // below compares not necessary if this check has found something.
 194                                         //
 196 "    LDR     R0, =task_ExpDrv\n"
 197 "    CMP     R0, R3\n"
 198 "    itt     eq\n"
 199 "    LDREQ   R3, =exp_drv_task\n"
 200 "    orreq   r3, #1\n"
 201 "    BEQ     exitHook\n"
 203 "    ldr     r0, =task_InitFileModules\n"
 204 "    cmp     r0, r3\n"
 205 "    itt     eq\n"
 206 "    ldreq   r3, =init_file_modules_task\n"
 207 "    orreq   r3, #1\n"
 208 "    BEQ     exitHook\n"
 210 "    LDR     R0, =task_FileWrite\n"
 211 "    CMP     R0, R3\n"
 212 "    itt     eq\n"
 213 "    LDREQ   R3, =filewritetask\n"
 214 "    orreq   r3, #1\n"
 215 "    BEQ     exitHook\n"
 217 /* FIXME
 218 
 219 "    LDR     R0, =task_DvlpSeqTask\n"
 220 "    CMP     R0, R3\n"
 221 "    itt     eq\n"
 222 "    LDREQ   R3, =developseq_task\n"
 223 "    orreq   r3, #1\n"
 224 "    BEQ     exitHook\n"
 225 
 226 "    LDR     R0, =task_MovieRecord\n" // NOTE : no video task hook for DIGIC6 cameras
 227 "    CMP     R0, R3\n"
 228 "    itt     eq\n"
 229 "    LDREQ   R3, =movie_record_task\n"
 230 "    BEQ     exitHook\n"
 231 
 232 */
 234 "exitHook:\n"
 235 "    pop    {r0}\n"     // restore overwritten register & execute overwritten instructions from original code
 236 "    stmdb   sp!, {r1, r2, r3, r4, r5, r6, r7, r8, r9, lr}\n"
 237 "    mov     r4, r0\n"
 238 "    ldr     r0, =0x8158\n"
 239 "    ldr.w   pc, =(hook_CreateTask + 8 + 1) \n"  // Continue in firmware, thumb bit set
 240 ".ltorg\n"
 241 );
 242 }
 244 // G16 1.00h  0xfc05e00d 61
 245 void __attribute__((naked,noinline)) sub_fc05e00c_my() {
 247     // see sub_fc07e98, sub_fc071392, sub_fc0e97f8
 248     if (*(int*)(0xd20b0000 + 0x97 * 4) & 0x10000) {
 249         // GPIO 0x10 (aka ON/OFF button) is not pressed -> play
 250         *(int*)(0x9494+0x4) = 0x200000;
 251     }
 252     else {
 253         // GPIO 0x10 is pressed -> rec
 254         *(int*)(0x9494+0x4) = 0x100000;
 255     }
 257     asm volatile (
 258 "    push    {r4, lr}\n"
 259 #if defined(CHDK_NOT_IN_CANON_HEAP)
 260 "    ldr     r4, =0x003077e0\n"         // heap start, modify here
 261 #else
 262     "ldr     r4, =new_sa\n"             // +
 263     "ldr     r4, [r4]\n"                // +
 264 #endif
 265 "    sub     sp, #0x78\n"
 266 "    ldr     r0, =0x006ce000\n"
 267 "    ldr     r1, =0x0008eb94\n"
 268 "    subs    r0, r0, r4\n"
 269 "    cmp     r0, r1\n"
 270 "    bhs     loc_fc05e01e\n"
 271 "loc_fc05e01c:\n"
 272 "    b       loc_fc05e01c\n"
 273 "loc_fc05e01e:\n"
 274 "    ldr     r1, =0x00008074\n"
 275 "    mov.w   r0, #0x80000\n"
 276 "    str     r0, [r1]\n"
 277 "    ldr     r1, =0x00008078\n"
 278 "    ldr     r0, =0x42b21000\n"
 279 "    str     r0, [r1]\n"
 280 "    ldr     r1, =0x0000807c\n"
 281 "    ldr     r0, =0x42b23000\n"
 282 "    str     r0, [r1]\n"
 283 "    movs    r1, #0x74\n"
 284 "    add     r0, sp, #4\n"
 285 "    blx     sub_fc2a1670\n" // j_bzero
 286 "    add     r2, sp, #4\n"
 287 "    ldr     r0, =0x0062e000\n"
 288 "    mov.w   r1, #0xa0000\n"
 289 "    stm     r2!, {r0, r1, r4}\n"
 290 "    ldr     r1, =0x0062346c\n" //  *"l4b"
 291 "    str     r0, [sp, #0x18]\n"
 292 "    movs    r0, #0x22\n"
 293 "    subs    r2, r1, r4\n"
 294 "    str     r0, [sp, #0x1c]\n"
 295 "    movs    r0, #0x98\n"
 296 "    str     r0, [sp, #0x20]\n"
 297 "    strd    r2, r1, [sp, #0x10]\n"
 298 "    movw    r0, #0x1e8\n"
 299 "    str     r0, [sp, #0x24]\n"
 300 "    movs    r0, #0xfa\n"
 301 "    str     r0, [sp, #0x28]\n"
 302 "    movs    r0, #0xb6\n"
 303 "    str     r0, [sp, #0x2c]\n"
 304 "    movs    r0, #0x85\n"
 305 "    str     r0, [sp, #0x30]\n"
 306 "    movs    r0, #0x40\n"
 307 "    str     r0, [sp, #0x34]\n"
 308 "    movs    r0, #4\n"
 309 "    str     r0, [sp, #0x38]\n"
 310 "    movs    r0, #0\n"
 311 "    str     r0, [sp, #0x3c]\n"
 312 "    movs    r0, #0x10\n"
 313 "    str     r0, [sp, #0x60]\n"
 314 //"    ldr     r1, =0xfc05e19d\n"
 315 "    ldr     r1, =sub_fc05e19d_my\n"    // -->>
 316 "    movs    r2, #0\n"
 317 "    lsls    r0, r0, #8\n"
 318 "    str     r0, [sp, #0x64]\n"
 319 "    asrs    r0, r0, #4\n"
 320 "    str     r0, [sp, #0x68]\n"
 321 "    lsls    r0, r0, #5\n"
 322 "    str     r0, [sp, #0x6c]\n"
 323 "    add     r0, sp, #4\n"
 324 "    blx     sub_fc2a0cd0\n"
 325 "    add     sp, #0x78\n"
 326 "    pop     {r4, pc}\n"
 328 ".ltorg\n"
 329 );
 330 }
 332 // G16 1.00h  0xfc05e19d 54
 333 void __attribute__((naked,noinline)) sub_fc05e19d_my() {
 334     asm volatile (
 335 "    push    {r4, lr}\n"
 336 "    ldr     r4, =0xfc05e248\n" //  *"/_term"
 337 "    bl      sub_fc05f3c8\n"
 338 "    ldr     r0, =0x000080ec\n"
 339 "    ldr     r1, [r0]\n"
 340 "    ldr     r0, =0x00008074\n"
 341 "    ldr     r0, [r0]\n"
 342 "    adds    r0, #0x10\n"
 343 "    cmp     r1, r0\n"
 344 "    bhs     loc_fc05e1b8\n"
 345 "    ldr     r0, =0xfc05e258\n" //  *"USER_MEM size checking"
 346 "    bl      sub_fc05e230\n"
 347 "loc_fc05e1b8:\n"
 348 "    bl      sub_fc13c5b0\n"
 349 "    ldr     r3, =0x80000800\n"
 350 "    mov.w   r1, #-0x80000000\n"
 351 "    mov.w   r2, #-0x11111112\n"
 352 "loc_fc05e1c6:\n"
 353 "    stm     r1!, {r2}\n"
 354 "    cmp     r1, r3\n"
 355 "    blo     loc_fc05e1c6\n"
 356 "    bl      sub_fc13c5c2\n"
 357 "    bl      sub_fc13cb6c\n"
 358 "    cmp     r0, #0\n"
 359 "    bge     loc_fc05e1de\n"
 360 "    ldr     r0, =0xfc05e274\n" //  *"dmSetup"
 361 "    bl      sub_fc05e230\n"
 362 "loc_fc05e1de:\n"
 363 "    bl      sub_fc05ea08\n"
 364 "    cmp     r0, #0\n"
 365 "    bge     loc_fc05e1ec\n"
 366 "    ldr     r0, =0xfc05e27c\n" //  *"termDriverInit"
 367 "    bl      sub_fc05e230\n"
 368 "loc_fc05e1ec:\n"
 369 "    mov     r0, r4\n"
 370 "    bl      sub_fc05ea9c\n"
 371 "    cmp     r0, #0\n"
 372 "    bge     loc_fc05e1fc\n"
 373 "    ldr     r0, =0xfc05e28c\n" //  *"termDeviceCreate"
 374 "    bl      sub_fc05e230\n"
 375 "loc_fc05e1fc:\n"
 376 "    mov     r0, r4\n"
 377 "    bl      sub_fc05e3d4\n"
 378 "    cmp     r0, #0\n"
 379 "    bge     loc_fc05e20c\n"
 380 "    ldr     r0, =0xfc05e2a0\n" //  *"stdioSetup"
 381 "    bl      sub_fc05e230\n"
 382 "loc_fc05e20c:\n"
 383 "    bl      sub_fc05e518\n"
 384 "    cmp     r0, #0\n"
 385 "    bge     loc_fc05e21a\n"
 386 "    ldr     r0, =0xfc05e2ac\n" //  *"stdlibSetup"
 387 "    bl      sub_fc05e230\n"
 388 "loc_fc05e21a:\n"
 389 "    bl      sub_fc0617d0\n"
 390 "    cmp     r0, #0\n"
 391 "    bge     loc_fc05e228\n"
 392 "    ldr     r0, =0xfc05e2b8\n" //  *"extlib_setup"
 393 "    bl      sub_fc05e230\n"
 394 "loc_fc05e228:\n"
 395 "    pop.w   {r4, lr}\n"
 396 "    b.w     sub_fc05e5a2_my\n"  // --->>
 398 ".ltorg\n"
 399     );
 400 }
 402 // G16 1.00h  0xffc05e5a3 27
 403 void __attribute__((naked,noinline)) sub_fc05e5a2_my() {
 404     asm volatile (
 405 "    push    {r3, lr}\n"
 406 "    bl      sub_fc05e6a4\n"
 407 "    bl      sub_fc0b5a00\n"
 408 "    cbnz    r0, loc_fc05e5b8\n"
 409 "    bl      sub_fc07e9a8\n" // IsNormalCameraMode_FW
 410 "    cbz     r0, loc_fc05e5b8\n"
 411 "    movs    r0, #1\n"
 412 "    b       loc_fc05e5ba\n"
 413 "loc_fc05e5b8:\n"
 414 "    movs    r0, #0\n"
 415 "loc_fc05e5ba:\n"
 416 "    bl      sub_fc070e98_my\n" // --->> power-on mode handling & startupchecks here
 417 "    cbnz    r0, loc_fc05e5c6\n"
 418 "    bl      sub_fc05e692\n"
 419 "loc_fc05e5c4:\n"
 420 "    b       loc_fc05e5c4\n"
 421 "loc_fc05e5c6:\n"
 422 "    blx     sub_fc2a0d28\n"
 423 "    ldr     r1, =0x006ce000\n"
 424 "    movs    r0, #0\n"
 425 "    bl      sub_fc30d7c4\n"
 426 "    blx     sub_fc2a1260\n"
 427 "    movs    r3, #0\n"
 428 "    str     r3, [sp]\n"
 429 //"    ldr     r3, =0xfc05e53d\n" //  task_Startup
 430 "    ldr     r3, =task_Startup_my\n"   //  --->>
 431 "    movs    r2, #0\n"
 432 "    movs    r1, #0x19\n"
 433 "    ldr     r0, =0xfc05e5f4\n" //  *"Startup"
 434 "    blx     sub_fc2a1280\n" // j_CreateTask
 435 "    movs    r0, #0\n"
 436 "    pop     {r3, pc}\n"
 438 ".ltorg\n"
 439     );
 440 }
 442 // G16 1.00h  0xfc070e99 25
 443 void __attribute__((naked,noinline)) sub_fc070e98_my() { 
 444     asm volatile (
 445 "    push.w  {r2, r3, r4, r5, r6, r7, r8, lr}\n"
 446 "    mov.w   r8, #0\n"
 447 "    mov     r7, r0\n"
 448 "    mov     r6, r8\n"
 449 "    bl      sub_fc07138e\n"
 450 "    movs    r0, #0x97\n"
 451 "    bl      sub_fc06ecba\n"
 452 "    movs    r4, #1\n"
 453 "    bic.w   r5, r4, r0\n"
 454 "    movs    r0, #0x98\n"
 455 "    bl      sub_fc06ecba\n"
 456 "    bics    r4, r0\n"
 457 "    cbz     r7, loc_fc070ec4\n"
 458 "    orrs.w  r0, r5, r4\n"
 459 //"    beq     loc_fc070ede\n"              // this check fails and results in shutdown
 460 "loc_fc070ec4:\n"
 461 "    bl      sub_fc0b5a00\n"
 462 "    movs    r3, #0\n"
 463 "    mov     r2, r0\n"
 464 "    strd    r8, r6, [sp]\n"
 465 "    mov     r1, r4\n"
 466 "    mov     r0, r5\n"
 467 //"    bl      sub_fc071392\n"              // startup checks
 468 //"    bl      sub_fc071390\n"              // nullsub
 469 "    movs    r0, #1\n"
 470 "loc_fc070ede:\n"
 471 "    pop.w   {r2, r3, r4, r5, r6, r7, r8, pc}\n"
 473  ".ltorg\n"
 474      );
 475  }
 477 // G16 1.00h  0xfc05e53d 26
 478 // task_Startup 0xfc05e53d
 479 void __attribute__((naked,noinline)) task_Startup_my() {
 480     asm volatile (
 481 "    push    {r4, lr}\n"
 482 "    bl      sub_fc0e4714\n"
 483 "    bl      sub_fc05e670\n"
 484 "    bl      sub_fc05e7e4\n"
 485 "    bl      sub_fc0e47ac\n"
 486 //"  bl      sub_fc05e83a\n"           //  startdiskboot commented out to avoid infinite boot loop
 488 // added for SD card UHS detection https://chdk.setepontos.com/index.php?topic=13089.msg132583#msg132583
 489 "    bl      sub_fc08f5b8\n"             // + switch off card per m10 and g7x ports
 491 "    bl      sub_fc0895ae\n"
 492 "    bl      sub_fc0e48f0\n"
 493 "    bl      sub_fc05e948\n"
 494 "    bl      sub_fc05e780\n"
 495 "    bl      sub_fc0e47ea\n"
 496 "    bl      sub_fc0999fc\n"
 497 "    bl      sub_fc0e48f6\n"
 498 //"    bl      sub_fc070d8a\n"
 499 "    bl      sub_fc070d8a_my\n"            // CreateTask PhySw
 501 #if defined(OPT_RUN_WITH_BATT_COVER_OPEN)
 502 "    LDR     R0, =0x1C0000\n"              // Pause for startup with battery door open
 503 "batt_delay:\n"
 504 "    NOP\n"
 505 "    SUBS    R0,R0,#1\n"
 506 "    BNE     batt_delay\n"
 507 #endif
 508 "    bl      CreateTask_spytask\n"
 509 //"    bl      init_required_fw_features\n" // added
 510 #ifdef DEBUG_BLINKING
 511 "    bl      CreateTask_blinker\n"
 512 #endif
 514 "    bl      sub_fc253fde\n"
 515 "    bl      sub_fc0e490c\n"
 516 "    bl      sub_fc0b57a4\n"
 517 "    bl      sub_fc0e44fc\n"
 518 "    bl      sub_fc0b58d0\n"
 519 "    bl      sub_fc0999ae\n"
 520 "    bl      sub_fc0e44bc\n"
 521 "    bl      sub_fc05e94c\n"
 522 "    bl      sub_fc307cf8\n"
 523 "    bl      sub_fc0e4496\n"
 524 "    pop.w   {r4, lr}\n"
 525 "    b.w     sub_fc0e46ea\n"
 527 ".ltorg\n"
 528     );
 529 }
 531 // G16 1.01h  0xfc070d8b 18 = taskcreate_physw
 532 void __attribute__((naked,noinline)) sub_fc070d8a_my() {
 533     asm volatile (
 534 "    push    {r3, r4, r5, lr}\n"
 535 "    bl      sub_fc0701d8\n"
 536 "    bl      sub_fc07e932\n" // IsFactoryMode_FW
 537 "    cbnz    r0, loc_fc070d9a\n"
 538 "    bl      sub_fc07017c\n" // OpLog.Start_FW
 539 "loc_fc070d9a:\n"
 540 "    ldr     r4, =0x00008324\n" //  physw_run
 541 "    ldr     r0, [r4, #4]\n"
 542 "    cmp     r0, #0\n"
 543 "    bne     loc_fc070db6\n"
 544 "    movs    r3, #0\n"
 545 "    str     r3, [sp]\n"
 546 //  "    ldr     r3, =0xfc070d65\n" //  task_PhySw
 547 "    ldr     r3, =mykbd_task\n"     //   --->>
 548 "    movs    r1, #0x17\n"
 549 "    ldr     r0, =0xfc070de4\n" //  *"PhySw"
 550 "    movw    r2, #0x2000\n"         // stack adjusted from 0x800 to 0x2000
 551 "    blx     sub_fc2a15b8\n" // j_CreateTaskStrictly
 552 "    str     r0, [r4, #4]\n"
 553 "loc_fc070db6:\n"
 554 "    pop     {r3, r4, r5, pc}\n"
 556 ".ltorg\n"
 557     );
 558 }
 560 // G16 1.00h  0xfc0b9259 16
 561 // task_InitFileModules 0xfc0b9259
 562 void __attribute__((naked,noinline)) init_file_modules_task() {
 563     asm volatile (
 564 "    push    {r4, r5, r6, lr}\n"
 565 "    bl      sub_fc0bba04\n"
 566 "    movs    r4, r0\n"
 567 "    movw    r5, #0x5006\n"
 568 "    beq     loc_fc0b926e\n"
 569 "    movs    r1, #0\n"
 570 "    mov     r0, r5\n"
 571 "    bl      _PostLogicalEventToUI\n"
 572 "loc_fc0b926e:\n"
 573 "    bl      sub_fc0bba32\n"
 574 "    bl      core_spytask_can_start\n" // + CHDK: Set "it's-safe-to-start" flag for spytask
 575 "    cmp     r4, #0\n"
 576 "    bne     loc_fc0b9282\n"
 577 "    mov     r0, r5\n"
 578 "    pop.w   {r4, r5, r6, lr}\n"
 579 "    movs    r1, #0\n"
 580 "    b.w     _PostLogicalEventToUI\n"
 581 "loc_fc0b9282:\n"
 582 "    pop     {r4, r5, r6, pc}\n"
 584 ".ltorg\n"
 585     );
 586 }
 588 /*
 589     *** Workarounds ***
 590     Stuff to avoid asserts on cameras running DryOS r54+
 591     Note : G16 runs DryOS r52 so this hooked but not needed. See : https://chdk.setepontos.com/index.php?topic=12516.0
 592 */
 593 /* FIXME
 594 void init_required_fw_features(void) {
 595 
 596     extern void _init_focus_eventflag();
 597     _init_focus_eventflag();
 598 
 599     extern void _init_nd_eventflag();
 600     extern void _init_nd_semaphore();
 601     _init_nd_eventflag();
 602     _init_nd_semaphore();
 603 
 604     extern int av_override_semaphore;
 605     extern int _CreateBinarySemaphoreStrictly(int x, int y);
 606     av_override_semaphore = _CreateBinarySemaphoreStrictly(0,0);
 607 }
 608 */
 610 // G16 1.00h  0xfc070b31 77
 611 void __attribute__((naked,noinline)) kbd_p2_f_my() {
 612     asm volatile(
 613 "    push.w  {r4, r5, r6, r7, r8, lr}\n"
 614 "    ldr     r6, =0x00033134\n"
 615 "    sub     sp, #0x18\n"
 616 "    add     r7, sp, #8\n"
 617 "    subs    r6, #0xc\n"
 618 "    b       loc_fc070b72\n"
 619 "loc_fc070b3e:\n"
 620 "    ldr     r1, =0x00033134\n"
 621 "    add     r3, sp, #8\n"
 622 "    ldrb.w  r0, [sp, #4]\n"
 623 "    add     r2, sp, #0x14\n"
 624 "    subs    r1, #0x18\n"
 625 "    bl      sub_fc071856\n"
 626 "    cbnz    r0, loc_fc070b58\n"
 627 "    ldr     r1, [sp, #0x14]\n"
 628 "    movs    r0, #0\n"
 629 "    bl      sub_fc070aa2\n"
 630 "loc_fc070b58:\n"
 631 "    movs    r0, #2\n"
 632 "loc_fc070b5a:\n"
 633 "    ldr.w   r1, [r7, r0, lsl #2]\n"
 634 "    cbz     r1, loc_fc070b6a\n"
 635 "    ldr.w   r2, [r6, r0, lsl #2]\n"
 636 "    bics    r2, r1\n"
 637 "    str.w   r2, [r6, r0, lsl #2]\n"
 638 "loc_fc070b6a:\n"
 639 "    subs    r0, r0, #1\n"
 640 "    sxtb    r0, r0\n"
 641 "    cmp     r0, #0\n"
 642 "    bge     loc_fc070b5a\n"
 643 "loc_fc070b72:\n"
 644 "    ldr     r0, =0x00033134\n"
 645 "    add     r1, sp, #4\n"
 646 "    subs    r0, #0xc\n"
 647 "    bl      sub_fc071584\n"
 648 "    cmp     r0, #0\n"
 649 "    bne     loc_fc070b3e\n"
 650 "    ldr.w   r8, =0x00033134\n"
 651 "    movs    r4, #0\n"
 652 "loc_fc070b86:\n"
 653 "    movs    r5, #0\n"
 654 "    ldr.w   r0, [r6, r4, lsl #2]\n"
 655 "    ldr.w   r1, [r8, r4, lsl #2]\n"
 656 "    ands    r0, r1\n"
 657 "    str.w   r0, [r6, r4, lsl #2]\n"
 658 "    b       loc_fc070bde\n"
 659 "loc_fc070b98:\n"
 660 "    lsrs    r0, r5\n"
 661 "    lsls    r0, r0, #0x1f\n"
 662 "    beq     loc_fc070bd6\n"
 663 "    ldr     r1, =0x00033134\n"
 664 "    add.w   r0, r5, r4, lsl #5\n"
 665 "    add     r3, sp, #8\n"
 666 "    subs    r1, #0x18\n"
 667 "    add     r2, sp, #0x14\n"
 668 "    uxtb    r0, r0\n"
 669 "    bl      sub_fc071856\n"
 670 "    cbnz    r0, loc_fc070bba\n"
 671 "    ldr     r1, [sp, #0x14]\n"
 672 "    movs    r0, #1\n"
 673 "    bl      sub_fc070aa2\n"
 674 "loc_fc070bba:\n"
 675 "    mov     r0, r4\n"
 676 "    b       loc_fc070bd2\n"
 677 "loc_fc070bbe:\n"
 678 "    ldr.w   r1, [r7, r0, lsl #2]\n"
 679 "    cbz     r1, loc_fc070bce\n"
 680 "    ldr.w   r2, [r6, r0, lsl #2]\n"
 681 "    bics    r2, r1\n"
 682 "    str.w   r2, [r6, r0, lsl #2]\n"
 683 "loc_fc070bce:\n"
 684 "    adds    r0, r0, #1\n"
 685 "    sxtb    r0, r0\n"
 686 "loc_fc070bd2:\n"
 687 "    cmp     r0, #3\n"
 688 "    blt     loc_fc070bbe\n"
 689 "loc_fc070bd6:\n"
 690 "    ldr.w   r0, [r6, r4, lsl #2]\n"
 691 "    adds    r5, r5, #1\n"
 692 "    uxtb    r5, r5\n"
 693 "loc_fc070bde:\n"
 694 "    cmp     r0, #0\n"
 695 "    bne     loc_fc070b98\n"
 696 "    adds    r4, r4, #1\n"
 697 "    sxtb    r4, r4\n"
 698 "    cmp     r4, #3\n"
 699 "    blt     loc_fc070b86\n"
 700 "    bl      sub_fc07147a_my\n"   //  --->>
 701 "    add     sp, #0x18\n"
 702 "    pop.w   {r4, r5, r6, r7, r8, pc}\n"
 704 ".ltorg\n"
 705   );
 706 }
 708 // G16 1.00h  0xfc07147b 20
 709 void __attribute__((naked,noinline)) sub_fc07147a_my() {
 710     asm volatile(
 711 "    push    {r4, lr}\n"
 712 "    ldr     r4, =0x00009494\n"
 713 "    ldr     r0, [r4, #8]\n"
 714 "    bl      sub_fc0721b4\n"
 715 "    bl      sub_fc0c784c\n"
 716 "    ldr     r0, [r4, #0xc]\n"
 717 "    bl      sub_fc0720d0\n"
 718 "    ldr     r0, [r4, #0x10]\n"
 719 "    bl      sub_fc0720d0\n"
 720 //"    pop.w   {r4, lr}\n"
 721 //"    b.w     loc_fc06befe\n"
 722 "    bl      handle_jogdial\n"  // +
 723 "    cmp     r0, #0\n"          // +
 724 "    beq     no_scroll\n"       // +
 725 "    bl      sub_fc06befe\n"    // handles scrollwheel(s), void function, no args
 726 "no_scroll:\n"                  // +
 727 "    pop     {r4, pc}\n"        // +
 728 ".ltorg\n"
 729     );
 730 }