root/platform/sx280hs/sub/102b/boot.c

DEFINITIONS

1. spytask
2. CreateTask_spytask
3. boot
4. CreateTask_my
5. sub_fc04f194_my
6. sub_fc04f324_my
7. sub_fc04f72a_my
8. sub_fc060338_my
9. sub_fc04f6c4_my
10. sub_fc06021a_my
11. init_file_modules_task
12. kbd_p2_f_my
13. sub_fc060900_my
14. tricinittask
15. update_url
16. agps_downloader_task

   2 #include "lolevel.h"
   3 #include "platform.h"
   4 #include "core.h"
   5 #include "dryos31.h"
   7 #define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
   9 const char * const new_sa = &_end;
  11 // Forward declarations
  12 extern volatile int jogdial_stopped;
  13 void JogDial_task_my(void);
  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();
  20 extern void task_AGPSDownloader();
  22 /*----------------------------------------------------------------------
  23     spytask
  24 -----------------------------------------------------------------------*/
  25 void spytask(long ua, long ub, long uc, long ud, long ue, long uf)
  26 {
  27     (void)ua; (void)ub; (void)uc; (void)ud; (void)ue; (void)uf;
core_spytask();
  29 }
  31 /*----------------------------------------------------------------------
  32     CreateTask_spytask
  33 -----------------------------------------------------------------------*/
  34 void CreateTask_spytask()
  35 {
_CreateTask("SpyTask", 0x19, 0x2000, spytask, 0);
  37 }
  39 ///*----------------------------------------------------------------------
  40 // Pointer to stack location where jogdial task records previous and current
  41 // jogdial positions
  42 // short *jog_position;
  44 /*----------------------------------------------------------------------
  45     boot()
  46 
  47     Main entry point for the CHDK code
  48 -----------------------------------------------------------------------*/
  50 /*************************************************************/
  51 void __attribute__((naked,noinline)) boot() {
  52     asm volatile ( // 0xfc02000c
  53 "    ldr.w   sp, =0x80010000\n" // top of data tcm?
  54 "    BL      sub_fc020064\n" // ITCM setup (vectors?)
  55 "    ldr     r2, =0xc0242010\n"
  56 "    ldr     r1, [r2, #0]\n"
  57 "    orr.w   r1, r1, #1\n"
  58 "    str     r1, [r2, #0]\n" // interrupt related?
  59 "    ldr     r0, =0xfc9538d4\n"
  60 "    ldr     r1, =0x010c1000\n"
  61 "    ldr     r3, =0x010e03c4\n"
  62 "    loc_fc020024:\n"
  63 "    cmp     r1, r3\n"
  64 "    itt     cc\n"
  65 "    ldrcc.w r2, [r0], #4\n"
  66 "    strcc.w r2, [r1], #4\n"
  67 "    bcc.n   loc_fc020024\n" // copy dryos kernel to RAM
  68 // Install CreateTask patch
  69 // use half words in case source or destination not word aligned
  70         "adr     r0, patch_CreateTask\n"    // src: Patch data
  71         "ldr     r1, =hook_CreateTask\n"    // dest: Address to patch (hook_ has thumb bit off)
  72         "add     r2, r0, #8\n" // two words
  73 "task_hook_loop:\n"
  74         "ldrh   r3, [r0],#2\n"
  75         "strh   r3, [r1],#2\n"
  76         "cmp    r0,r2\n"
  77         "blo    task_hook_loop\n"
  79 "    ldr     r0, =0x010c1000\n"
  80 "    ldr     r1, =0x0001f3c4\n"
  81 "    BL      sub_fc12dd3a\n" // clean data cache (on the kernel area)
  82 "    ldr     r0, =0xfc932474\n"
  83 "    ldr     r1, =0x00008000\n" // end of ITCM
  84 "    ldr     r3, =0x00029460\n"
  85 "    loc_fc020040:\n"
  86 "    cmp     r1, r3\n"
  87 "    itt     cc\n"
  88 "    ldrcc.w r2, [r0], #4\n"
  89 "    strcc.w r2, [r1], #4\n"
  90 "    bcc.n   loc_fc020040\n" // copy pre-initialized data
  91 "    ldr     r3, =0x00029460\n"
  92 "    ldr     r1, =0x002bd558\n"
  93 "    mov.w   r2, #0\n"
  94 "    loc_fc020056:\n"
  95 "    cmp     r3, r1\n"
  96 "    it      cc\n"
  97 "    strcc.w r2, [r3], #4\n"
  98 "    bcc.n   loc_fc020056\n" // zero-fill the above area
  99 "    b.w     sub_fc04f194_my\n" // continue 
 101         "patch_CreateTask:\n"
 102         "ldr.w   pc, [pc,#0]\n"             // Do jump to absolute address CreateTask_my
 103         ".long   CreateTask_my + 1\n"           // has to be a thumb address
 104 );
 105 }
 107 /*************************************************************/
 108 void __attribute__((naked,noinline)) CreateTask_my() {
 109 asm volatile (
 110 "    push   {r0}\n"
 111 //R3 = Pointer to task function to create
 112 "    ldr     r0, =task_CaptSeq\n"       // DryOS original code function ptr.
 113 "    cmp     r0, r3\n"                  // is the given taskptr equal to our searched function?
 114 "    itt     eq\n"                      // EQ block
 115 "    ldreq   r3, =capt_seq_task\n"      // if so replace with our task function base ptr.
 116 "    orreq   r3, #1\n"                  // make sure it's a thumb address (may not be needed?)
 117 "    beq     exitHook\n"                // below compares not necessary if this check has found something.
 119 "    LDR     R0, =task_ExpDrv\n"
 120 "    CMP     R0, R3\n"
 121 "    itt     eq\n"
 122 "    LDREQ   R3, =exp_drv_task\n"
 123 "    orreq   r3, #1\n"
 124 "    BEQ     exitHook\n"
 126 "    LDR     R0, =task_DvlpSeqTask\n"
 127 "    CMP     R0, R3\n"
 128 "    itt     eq\n"
 129 "    LDREQ   R3, =developseq_task\n"
 130 "    orreq   r3, #1\n"
 131 "    BEQ     exitHook\n"
 133 "    LDR     R0, =task_TricInitTask\n"
 134 "    CMP     R0, R3\n"
 135 "    itt     eq\n"
 136 "    LDREQ   R3, =tricinittask\n"
 137 "    orreq   r3, #1\n"
 138 "    BEQ     exitHook\n"
 140 "    LDR     R0, =task_FileWrite\n"
 141 "    CMP     R0, R3\n"
 142 "    itt     eq\n"
 143 "    LDREQ   R3, =filewritetask\n"
 144 "    orreq   r3, #1\n"
 145 "    BEQ     exitHook\n"
 147 #if PLATFORMID == 12895
 148 "    LDR     R0, =task_AGPSDownloader\n"
 149 "    CMP     R0, R3\n"
 150 "    itt     eq\n"
 151 "    LDREQ   R3, =agps_downloader_task\n"
 152 "    orreq   r3, #1\n"
 153 "    BEQ     exitHook\n"
 154 #endif
 157 "    LDR     R0, =task_MovieRecord\n"
 158 "    CMP     R0, R3\n"
 159 "    itt     eq\n"
 160 "    LDREQ   R3, =movie_record_task\n"
 161 "    orreq   r3, #1\n"
 162 "    BEQ     exitHook\n"
 165 "    ldr     r0, =task_InitFileModules\n"
 166 "    cmp     r0, r3\n"
 167 "    itt     eq\n"
 168 "    ldreq   r3, =init_file_modules_task\n"
 169 "    orreq   r3, #1\n"
 170 "exitHook:\n" 
 171 // restore overwritten register(s)
 172 "    pop    {r0}\n"
 173 // Execute overwritten instructions from original code, then jump to firmware
 174 "    stmdb   sp!, {r1, r2, r3, r4, r5, r6, r7, r8, r9, lr}\n"
 175 "    mov     r4, r0\n"
 176 "    ldr     r0, =0x8154\n"
 177 "    ldr.w   pc, =(hook_CreateTask + 8 + 1) \n"  // Continue in firmware, thumb bit set
 178 ".ltorg\n"
 179 );
 180 }
 182 //fc04f194
 183 void __attribute__((naked,noinline)) sub_fc04f194_my() {
 185     if (*(int*)(0xd20b0000 + 0x10 * 4) & 0x10000) {
 186         // see sub_fc060338, sub_fc06082a
 187         // GPIO 0x10 (aka ON/OFF button) is not pressed -> play
 188         *(int*)(0x92a0+0x4) = 0x200000;
 189     }
 190     else {
 191         // GPIO 0x10 is pressed -> rec
 192         *(int*)(0x92a0+0x4) = 0x100000;
 193     }
 194     asm volatile (
 195     "push    {r4, lr}\n"
 196 #if defined(CHDK_NOT_IN_CANON_HEAP)
 197     "ldr     r4, =0x002bd558\n"         // heap start, modify here
 198 #else
 199     "ldr     r4, =new_sa\n"             // +
 200     "ldr     r4, [r4]\n"                // +
 201 #endif
 202     "sub     sp, #0x78\n"
 203     "ldr     r0, =0x005ce000\n"
 204     "ldr     r1, =0x00071b34\n"
 205     "subs    r0, r0, r4\n"
 206     "cmp     r0, r1\n"
 207     "bcs.n   loc_fc04f1a6\n"
 208     "loc_fc04f1a4:\n"
 209     "b.n     loc_fc04f1a4\n"            // too small heap, go into infinite loop
 210     "loc_fc04f1a6:\n"
 211     "ldr     r1, =0x00008070\n"
 212     "mov.w   r0, #0x80000\n"
 213     "str     r0, [r1, #0]\n"
 214     "ldr     r1, =0x00008074\n"
 215     "ldr     r0, =0x42b21000\n"         // SD boot sector is copied here later
 216     "str     r0, [r1, #0]\n"
 217     "ldr     r1, =0x00008078 \n"
 218     "ldr     r0, =0x42b23000\n"         // copy of FAT?
 219     "str     r0, [r1, #0]\n"
 220     "movs    r1, #0x74\n"
 221     "add     r0, sp, #4\n"
 222     "blx     sub_fc251d44\n"            // zerofill, ARM veneer for an ARM function
 223     "add     r2, sp, #4\n"
 224     "ldr     r0, =0x0054b000\n"
 225     "mov.w   r1, #0x83000\n"
 226     "stmia   r2!, {r0, r1, r4}\n"
 227     "ldr     r1, =0x005404cc\n"
 228     "str     r0, [sp, #24]\n"
 229     "movs    r0, #0x22\n"
 230     "subs    r2, r1, r4\n"
 231     "str     r0, [sp, #28]\n"
 232     "movs    r0, #0x98\n"
 233     "str     r0, [sp, #32]\n"
 234     "strd    r2, r1, [sp, #16]\n"
 235     "movw    r0, #0x1e8\n"
 236     "str     r0, [sp, #36]\n"
 237     "movs    r0, #0xf6\n"
 238     "str     r0, [sp, #40]\n"
 239     "movs    r0, #0xb6\n"
 240     "str     r0, [sp, #44]\n"
 241     "movs    r0, #0x85\n"
 242     "str     r0, [sp, #48]\n"
 243     "movs    r0, #0x40\n"
 244     "str     r0, [sp, #52]\n"
 245     "movs    r0, #4\n"
 246     "str     r0, [sp, #56]\n"
 247     "movs    r0, #0\n"
 248     "str     r0, [sp, #60]\n"
 249     "movs    r0, #16\n"
 250     "str     r0, [sp, #96]\n"
 251     "ldr     r1, =sub_fc04f324_my\n"    // -> continue here (init_task)
 252     "movs    r2, #0\n"
 253     "lsls    r0, r0, #7\n"
 254     "str     r0, [sp, #100]\n"
 255     "asrs    r0, r0, #3\n"
 256     "str     r0, [sp, #104]\n"
 257     "lsls    r0, r0, #5\n"
 258     "str     r0, [sp, #108]\n"
 259     "add     r0, sp, #4\n"
 260     "blx     sub_fc25138c\n"
 261     "add     sp, #0x78\n"
 262     "pop     {r4, pc}\n"
 263     ".ltorg\n"
 264     );
 265 }
 267 //fc04f324
 268 void __attribute__((naked,noinline)) sub_fc04f324_my() {
 269     asm volatile (
 270     "push    {r4, lr}\n"
 271     "ldr     r4, =0xfc04f3d0\n" // "/_term"
 272     "bl      sub_fc050c14\n"
 273     "ldr     r0, =0x000080e8\n"
 274     "ldr     r1, [r0, #0]\n"
 275     "ldr     r0, =0x00008070\n"
 276     "ldr     r0, [r0, #0]\n"
 277     "adds    r0, #16\n"
 278     "cmp     r1, r0\n"
 279     "bcs.n   loc_fc04f340\n"
 280     "ldr     r0, =0xfc04f3e0\n" // "USER_MEM size checking"
 281     "bl      sub_fc04f3b8\n"
 282     "loc_fc04f340:\n"
 283     "bl      sub_fc12de14\n"
 284     "ldr     r3, =0x80000800\n"
 285     "mov.w   r1, #0x80000000\n"
 286     "mov.w   r2, #0xeeeeeeee\n"
 287     "loc_fc04f34e:\n"
 288     "stmia   r1!, {r2}\n"
 289     "cmp     r1, r3\n"
 290     "bcc.n   loc_fc04f34e\n"
 291     "bl      sub_fc12de26\n"
 292     "bl      sub_fc0b9f4c\n"
 293     "cmp     r0, #0\n"
 294     "bge.n   loc_fc04f366\n"
 295     "ldr     r0, =0xfc04f3fc\n" // "dmSetup"
 296     "bl      sub_fc04f3b8\n"
 297     "loc_fc04f366:\n"
 298     "bl      sub_fc04fb90\n"
 299     "cmp     r0, #0\n"
 300     "bge.n   loc_fc04f374\n"
 301     "ldr     r0, =0xfc04f404\n" // "termDriverInit"
 302     "bl      sub_fc04f3b8\n"
 303     "loc_fc04f374:\n"
 304     "mov     r0, r4\n"
 305     "bl      sub_fc04fc24\n"
 306     "cmp     r0, #0\n"
 307     "bge.n   loc_fc04f384\n"
 308     "ldr     r0, =0xfc04f414\n" // "termDeviceCreate"
 309     "bl      sub_fc04f3b8\n"
 310     "loc_fc04f384:\n"
 311     "mov     r0, r4\n"
 312     "bl      sub_fc04f55c\n"
 313     "cmp     r0, #0\n"
 314     "bge.n   loc_fc04f394\n"
 315     "ldr     r0, =0xfc04f428\n" // "stdioSetup"
 316     "bl      sub_fc04f3b8\n"
 317     "loc_fc04f394:\n"
 318     "bl      sub_fc04f6a0\n"
 319     "cmp     r0, #0\n"
 320     "bge.n   loc_fc04f3a2\n"
 321     "ldr     r0, =0xfc04f434\n" // "stdlibSetup"
 322     "bl      sub_fc04f3b8\n"
 323     "loc_fc04f3a2:\n"
 324     "bl      sub_fc053604\n"
 325     "cmp     r0, #0\n"
 326     "bge.n   loc_fc04f3b0\n"
 327     "ldr     r0, =0xfc04f440\n" // "extlib_setup"
 328     "bl      sub_fc04f3b8\n"
 329     "loc_fc04f3b0:\n"
 330     "ldmia.w sp!, {r4, lr}\n"
 331     "b.w     sub_fc04f72a_my\n" // -> continue (taskcreate_startup)
 332     ".ltorg\n"
 333     );
 334 }
 336 void __attribute__((naked,noinline)) sub_fc04f72a_my() {
 337     asm volatile (
 338     "push    {r3, lr}\n"
 339     "bl      sub_fc04f82c\n"
 340     "bl      sub_fc095cbe\n"    // checks for 0x12345678 @ 0x4ffc (reboot writes that there)
 341     "cbnz    r0, loc_fc04f740\n"
 342     "bl      sub_fc07205c\n"    // IsNormalCameraMode
 343     "cbz     r0, loc_fc04f740\n"
 344     "movs    r0, #1\n"
 345     "b.n     loc_fc04f742\n"
 346     "loc_fc04f740:\n"
 347     "movs    r0, #0\n"
 348     "loc_fc04f742:\n"
 349     "bl      sub_fc060338_my\n" // -> power-on mode handling & startupchecks here
 350     "cbnz    r0, loc_fc04f74e\n"
 351     "bl      sub_fc04f81a\n"
 352     "loc_fc04f74c:\n"
 353     "b.n     loc_fc04f74c\n"    // infinite loop
 354     "loc_fc04f74e:\n"
 355     "blx     sub_fc2513ec\n"
 356     "ldr     r1, =0x005ce000\n" // could be removed, but doesn't matter
 357     "movs    r0, #0\n"
 358     "bl      sub_fc2b7b78\n"    // could be removed, but doesn't matter
 359     "blx     sub_fc251b14\n"    // kersys.c
 360     "movs    r3, #0\n"
 361     "str     r3, [sp, #0]\n"
 362     "ldr     r3, =sub_fc04f6c4_my\n"
 363     "movs    r2, #0\n"
 364     "movs    r1, #25\n"
 365     "ldr     r0, =0xfc04f77c\n" // "Startup"
 366     "blx     sub_fc251904\n"    // CreateTask
 367     "movs    r0, #0\n"
 368     "pop     {r3, pc}\n"
 369     ".ltorg\n"
 370     );
 371 }
 373 void __attribute__((naked,noinline)) sub_fc060338_my() {
 374     asm volatile (
 375     "stmdb   sp!, {r2, r3, r4, r5, r6, r7, r8, lr}\n"
 376     "mov.w   r8, #0\n"
 377     "mov     r7, r0\n"
 378     "mov     r6, r8\n"
 379     "bl      sub_fc060826\n"    // nullsub
 380     "movs    r0, #16\n"
 381     "bl      sub_fc05f5c2\n"    // reads GPIO (16) ON/OFF button
 382     "movs    r4, #1\n"
 383     "bic.w   r5, r4, r0\n"
 384     "movs    r0, #15\n"
 385     "bl      sub_fc05f5c2\n"    // reads GPIO (15)
 386     "bics    r4, r0\n"
 387     "cbz     r7, loc_fc060364\n"
 388     "orrs.w  r0, r5, r4\n"
 389     //"beq.n   loc_fc06037e\n"  // - this check fails and results in shutdown
 390     "loc_fc060364:\n"
 391     "bl      sub_fc095cbe\n"    // checks for 0x12345678 @ 0x4ffc (reboot writes that there)
 392     "movs    r3, #0\n"
 393     "mov     r2, r0\n"
 394     "strd    r8, r6, [sp]\n"
 395     "mov     r1, r4\n"
 396     "mov     r0, r5\n"
 397     //"bl      sub_fc06082a\n"  // - startupchecks
 398     //"bl      sub_fc060828\n"  // - nullsub
 399     "movs    r0, #1\n"
 400     "loc_fc06037e:\n"
 401     "ldmia.w sp!, {r2, r3, r4, r5, r6, r7, r8, pc}\n"
 402     ".ltorg\n"
 403     );
 404 }
 407 // task_Startup
 408 void __attribute__((naked,noinline)) sub_fc04f6c4_my() {
 409     asm volatile (
 410     "push    {r4, lr}\n"
 411     "bl      sub_fc0ba768\n"
 412     "bl      sub_fc04f7f8\n"
 413     "bl      sub_fc04f96c\n"
 414     "bl      sub_fc095d10\n"
 415     //"bl      sub_fc04f9c2\n"      // - startdiskboot
 416     "bl      sub_fc07aff2\n"
 417     "bl      sub_fc0ba800\n"
 418     "bl      sub_fc04fad0\n"
 419     "bl      sub_fc04f908\n"
 420     "bl      sub_fc095d4e\n"
 421     "bl      sub_fc095998\n"
 422     "bl      sub_fc0ba806\n"
 423     "BL      CreateTask_spytask\n"  // +
 424     "bl      sub_fc06021a_my\n"     // -> taskcreate_physw
 425     "bl      sub_fc20d304\n"
 426     "bl      sub_fc0ba81c\n"
 427     "bl      sub_fc095750\n"
 429 #if defined(OPT_RUN_WITH_BATT_COVER_OPEN)
 430 "   mov     r0, #0x100000 \n"       // +
 431 "batt_loop1: \n"                    // +
 432 "   nop\n"                          // +
 433 "   SUBS    R0,R0,#1 \n"            // +
 434 "   BNE     batt_loop1 \n"          // +
 435 #endif
 437     "bl      sub_fc12ed44\n"
 438     "bl      sub_fc095b24\n"
 439     "bl      sub_fc09594a\n"
 440     "bl      sub_fc12ed04\n"
 441     "bl      sub_fc04fad4\n"
 442     "bl      sub_fc2a3bba\n"
 443     "bl      sub_fc12ecde\n"
 444     "ldmia.w sp!, {r4, lr}\n"
 445     //"b.w     sub_fc0ba73e\n"      // - (not recognized automatically yet, transformed into ldr pc)
 446     "ldr     pc, =0xfc0ba73f\n"     // + thumb address must be used
 447     ".ltorg\n"
 448     );
 449 }
 451 //taskcreate_physw
 452 void __attribute__((naked,noinline)) sub_fc06021a_my() {
 453     asm volatile (
 454     "push    {r3, r4, r5, lr}\n"
 455     "ldr     r4, =0x8328\n"
 456     "ldr     r0, [r4, #4]\n"
 457     "cbnz    r0, loc_fc060236\n"
 458     "movs    r3, #0\n"
 459     "str     r3, [sp, #0]\n"
 460     "ldr     r3, =mykbd_task\n"
 461     "movs    r1, #23\n"
 462     "ldr     r0, =0xfc06027c\n" // "PhySw"
 463     "movw    r2, #0x2000\n"     // original value 0x800
 464     "blx     sub_fc251c0c\n"
 465     "str     r0, [r4, #4]\n"
 466     "loc_fc060236:\n"
 467     "bl      sub_fc061aac\n"
 468     "bl      sub_fc071fe6\n"
 469     "cmp     r0, #0\n"
 470     "bne.n   loc_fc06024e\n"
 471     "ldr     r1, =0x2ae94\n"
 472     "ldmia.w sp!, {r3, r4, r5, lr}\n"
 473     "subs    r1, #24\n"
 474     //"b.w     sub_fc061a54\n"  // - the stub generator needs fixing to support this
 475     "ldr     pc, =0xfc061a55\n" // + thumb address must be used
 476     "loc_fc06024e:\n"
 477     "pop     {r3, r4, r5, pc}\n"
 478     ".ltorg\n"
 479     );
 480 }
 482 void __attribute__((naked,noinline)) init_file_modules_task() { //sub_fc088220_my()
 483     asm volatile (
 484 "    push    {r4, r5, r6, lr}\n"
 485 "    bl      sub_fc09ad60\n"
 486 "    movs    r4, r0\n"
 487 "    movw    r5, #0x5006\n"
 488 "    beq.n   loc_fc088236\n"
 489 "    movs    r1, #0\n"
 490 "    mov     r0, r5\n"
 491 "    bl      sub_fc2a610c\n"
 492 "loc_fc088236:\n"
 493 "    bl      sub_fc09ad96\n"
 494 "    BL      core_spytask_can_start\n" // + CHDK: Set "it's-safe-to-start" flag for spytask
 495 "    cmp     r4, #0\n"
 496 "    bne.n   loc_fc08824a\n"
 497 "    mov     r0, r5\n"
 498 "    ldmia.w sp!, {r4, r5, r6, lr}\n"
 499 "    movs    r1, #0\n"
 500 "    b.w     sub_fc2a610c\n"
 501 "loc_fc08824a:\n"
 502 "    pop     {r4, r5, r6, pc}\n"
 503     );
 504 }
 506 void __attribute__((naked,noinline)) kbd_p2_f_my() { // 0xfc05ffc0
 507     asm volatile(
 508 "    stmdb   sp!, {r4, r5, r6, r7, r8, lr}\n"
 509 "    ldr     r6, =0x2ae94\n"
 510 "    sub     sp, #0x18\n"
 511 "    add     r7, sp, #8\n"
 512 "    subs    r6, #0xc\n"
 513 "    b.n     loc_fc060002\n"
 514 "loc_fc05ffce:\n"
 515 "    ldr     r1, =0x2ae94\n"
 516 "    add     r3, sp, #8\n"
 517 "    ldrb.w  r0, [sp, #4]\n"
 518 "    add     r2, sp, #0x14\n"
 519 "    subs    r1, #0x18\n"
 520 "    bl      sub_fc060ca4\n"
 521 "    cbnz    r0, loc_fc05ffe8\n"
 522 "    ldr     r1, [sp, #0x14]\n"
 523 "    movs    r0, #0\n"
 524 "    bl      sub_fc05ff32\n"
 525 "loc_fc05ffe8:\n"
 526 "    movs    r0, #2\n"
 527 "loc_fc05ffea:\n"
 528 "    ldr.w   r1, [r7, r0, lsl #2]\n"
 529 "    cbz     r1, loc_fc05fffa\n"
 530 "    ldr.w   r2, [r6, r0, lsl #2]\n"
 531 "    bics    r2, r1\n"
 532 "    str.w   r2, [r6, r0, lsl #2]\n"
 533 "loc_fc05fffa:\n"
 534 "    subs    r0, r0, #1\n"
 535 "    sxtb    r0, r0\n"
 536 "    cmp     r0, #0\n"
 537 "    bge.n   loc_fc05ffea\n"
 538 "loc_fc060002:\n"
 539 "    ldr     r0, =0x2ae94\n"
 540 "    add     r1, sp, #4\n"
 541 "    subs    r0, #0xc\n"
 542 "    bl      sub_fc0609d6\n"
 543 "    cmp     r0, #0\n"
 544 "    bne.n   loc_fc05ffce\n"
 545 "    ldr     r8, =0x2ae94\n"
 546 "    movs    r4, #0\n"
 547 "loc_fc060016:\n"
 548 "    movs    r5, #0\n"
 549 "    ldr.w   r0, [r6, r4, lsl #2]\n"
 550 "    ldr.w   r1, [r8, r4, lsl #2]\n"
 551 "    ands    r0, r1\n"
 552 "    str.w   r0, [r6, r4, lsl #2]\n"
 553 "    b.n     loc_fc06006e\n"
 554 "loc_fc060028:\n"
 555 "    lsrs    r0, r5\n"
 556 "    lsls    r0, r0, #0x1f\n"
 557 "    beq.n   loc_fc060066\n"
 558 "    ldr     r1, =0x2ae94\n"
 559 "    add.w   r0, r5, r4, lsl #5\n"
 560 "    add     r3, sp, #8\n"
 561 "    subs    r1, #0x18\n"
 562 "    add     r2, sp, #0x14\n"
 563 "    uxtb    r0, r0\n"
 564 "    bl      sub_fc060ca4\n"
 565 "    cbnz    r0, loc_fc06004a\n"
 566 "    ldr     r1, [sp, #0x14]\n"
 567 "    movs    r0, #1\n"
 568 "    bl      sub_fc05ff32\n"
 569 "loc_fc06004a:\n"
 570 "    mov     r0, r4\n"
 571 "    b.n     loc_fc060062\n"
 572 "loc_fc06004e:\n"
 573 "    ldr.w   r1, [r7, r0, lsl #2]\n"
 574 "    cbz     r1, loc_fc06005e\n"
 575 "    ldr.w   r2, [r6, r0, lsl #2]\n"
 576 "    bics    r2, r1\n"
 577 "    str.w   r2, [r6, r0, lsl #2]\n"
 578 "loc_fc06005e:\n"
 579 "    adds    r0, r0, #1\n"
 580 "    sxtb    r0, r0\n"
 581 "loc_fc060062:\n"
 582 "    cmp     r0, #3\n"
 583 "    blt.n   loc_fc06004e\n"
 584 "loc_fc060066:\n"
 585 "    ldr.w   r0, [r6, r4, lsl #2]\n"
 586 "    adds    r5, r5, #1\n"
 587 "    uxtb    r5, r5\n"
 588 "loc_fc06006e:\n"
 589 "    cmp     r0, #0\n"
 590 "    bne.n   loc_fc060028\n"
 591 "    adds    r4, r4, #1\n"
 592 "    sxtb    r4, r4\n"
 593 "    cmp     r4, #3\n"
 594 "    blt.n   loc_fc060016\n"
 595 "    bl      sub_fc060900_my\n"     // ->
 596 "    add     sp, #0x18\n"
 597 "    ldmia.w sp!, {r4, r5, r6, r7, r8, pc}\n"
 598 ".ltorg\n"
 599     );
 600 }
 602 void __attribute__((naked,noinline)) sub_fc060900_my() {
 603     asm volatile(
 604 "    push    {r4, lr}\n"
 605 "    ldr     r4, =0x92a0\n"
 606 "    ldr     r0, [r4, #8]\n"
 607 "    bl      sub_fc0629f4\n"
 608 "    bl      sub_fc0a0fa0\n"
 609 "    ldr     r0, [r4, #12]\n"
 610 "    bl      sub_fc062910\n"
 611 //"    ldmia.w sp!, {r4, lr}\n" // - (reordered below)
 612 //"    b.w     loc_fc05cbf6\n"  // - (reordered below)
 613 "    bl      handle_jogdial\n"  // +
 614 "    cmp     r0, #0\n"          // +
 615 "    beq     no_scroll\n"       // +
 616 "    bl      sub_fc05cbf6\n"    // handles scrollwheel(s), void function, no args
 617 "no_scroll:\n"                  // +
 618 "    pop     {r4, pc}\n"        // +
 619     );
 620 }
 623 // following is for supporting "firmware update" boot
 624 void __attribute__((naked,noinline)) tricinittask() {
 625     asm volatile(
 626 // capdis -f=chdk -s=task_TricInitTask -c=35 -stubs PRIMARY.BIN 0xfc000000
 627 // task_TricInitTask 0xfc373d31
 628 "    push.w  {r1, r2, r3, r4, r5, r6, r7, r8, sb, sl, fp, lr}\n"
 629 "    blx     sub_fc251a4c\n"
 630 "    movs    r0, #8\n"
 631 "    ldr     r1, =0xfc373f80\n" //  *"InitTskStart"
 632 "    bl      sub_fc28b766\n"
 633 "    ldr.w   fp, =0x0001bf74\n"
 634 "    movw    sl, #0x1000\n"
 635 "    ldr     r4, =0x0001bf70\n"
 636 "    movs    r2, #0\n"
 637 "    ldr     r1, =0x0003830f\n"
 638 "    ldr     r0, [r4]\n"
 639 "    blx     sub_fc251cc4\n" // j_WaitForAnyEventFlag
 640 "    lsls    r0, r0, #0x1f\n"
 641 "    beq     loc_fc373d6a\n"
 642 "    movs    r0, #8\n"
 643 "    ldr     r1, =0xfc373f98\n" //  *"ER IniTskWait"
 644 "    bl      sub_fc28b7c2\n"
 645 "    ldr     r1, =0x0001bf5c\n"
 646 "    movs    r0, #0\n"
 647 "    str     r0, [r1]\n"
 648 "    pop.w   {r1, r2, r3, r4, r5, r6, r7, r8, sb, sl, fp, pc}\n"
 649 "loc_fc373d6a:\n"
 650 "    ldr     r4, =0x0001bf70\n"
 651 "    add     r1, sp, #8\n"
 652 "    ldr     r0, [r4]\n"
 653 "    blx     sub_fc251b64\n" // j_GetEventFlagValue
 654 "    ldr     r1, [sp, #8]\n"
 655 "    ldr     r0, [r4]\n"
 656 "    blx     sub_fc251b94\n" // j_ClearEventFlag
 657 "    ldr     r6, [sp, #8]\n"
 658 "    lsls    r0, r6, #0x1e\n"
 659 "    beq     sub_fc373e42\n" // loc -> sub
 660 "    lsls    r0, r6, #0x1f\n"
 661 "    beq     sub_fc373d8c\n" // loc -> sub
 663 "    ldr     r0, =0xd2020074\n" // +
 664 "    ldr     r0, [r0]\n"        // + nonzero when core already running
 665 "    subs    r0, #0\n"          // +
 666 "    beq     tric1\n"           // +
 667 "    ldr     r0, [r4]\n"        // +
 668 "    mov     r1, #0x80\n"       // +
 669 "    bl      _SetEventFlag\n"   // + core already initialized, set the SmacIdleCmp eventflag here
 670 "tric1:\n"                      // +
 672 "    bl      sub_fc3740d0\n"
 673 //"    b       loc_fc373dce\n" // -
 674 "    ldr     pc, =0xfc373dcf\n" // -> continue in rom
 675     );
 676 }
 678 #if PLATFORMID == 12895 // sx280 only
 679 // following supplies new URL for up-to-date AGPS data
 681 void update_url() {
strcpy(*(char**)(0xd1bc+0x1c),"http://epodownload.mediatek.com/EPO.DAT");
 683 }
 685 void __attribute__((naked,noinline)) agps_downloader_task() {
 686     asm volatile(
 687 // capdis -f=chdk -s=task_AGPSDownloader -c=44 -stubs PRIMARY.BIN 0xfc000000
 688 // task_AGPSDownloader 0xfc07ba67
 689 "    push    {r3, r4, r5, r6, r7, lr}\n"
 690 "    movs    r4, #0\n"
 691 "    ldr     r7, =0x0000d1bc\n"
 692 "    subs    r6, r4, #1\n"
 693 "    b       loc_fc07bad6\n"
 694 "loc_fc07ba70:\n"
 695 "    ldr     r0, [r7]\n"
 696 "    movs    r2, #0\n"
 697 "    mov     r1, sp\n"
 698 "    blx     sub_fc251bfc\n" // j_ReceiveMessageQueue
 699 "    mov     r4, r0\n"
 700 "    lsls    r0, r0, #0x1f\n"
 701 "    beq     loc_fc07ba8a\n"
 702 "    movs    r2, #0xf2\n"
 703 "    movs    r0, #0\n"
 704 "    ldr     r1, =0xfc07bc48\n" //  *"AGPSDownloader.c"
 705 "    blx     sub_fc251d14\n" // j_DebugAssert
 706 "loc_fc07ba8a:\n"
 707 "    ldr     r0, [r7, #0x14]\n"
 708 "    adds    r0, r0, #1\n"
 709 "    bne     loc_fc07ba94\n"
 710 "    mov     r5, r6\n"
 711 "    b       loc_fc07ba98\n"
 712 "loc_fc07ba94:\n"
 713 "    ldr     r0, [sp]\n"
 714 "    ldr     r5, [r0]\n"
 715 "loc_fc07ba98:\n"
 716 "    ldr     r0, [sp]\n"
 717 "    bl      sub_fc2b7b80\n" // j_free
 718 "    cmp     r5, #7\n"
 719 "    bhs     loc_fc07bad6\n"
 720 "    tbb     [pc, r5]\n" // (jumptable r5 7 elements)
 721 "branchtable_fc07baa6:\n"
 722 "    .byte((loc_fc07baae - branchtable_fc07baa6) / 2)\n" // (case 0)
 723 "    .byte((loc_fc07bab4 - branchtable_fc07baa6) / 2)\n" // (case 1)
 724 "    .byte((loc_fc07baba - branchtable_fc07baa6) / 2)\n" // (case 2)
 725 "    .byte((loc_fc07bac0 - branchtable_fc07baa6) / 2)\n" // (case 3)
 726 "    .byte((loc_fc07bac6 - branchtable_fc07baa6) / 2)\n" // (case 4)
 727 "    .byte((loc_fc07bacc - branchtable_fc07baa6) / 2)\n" // (case 5)
 728 "    .byte((loc_fc07bad2 - branchtable_fc07baa6) / 2)\n" // (case 6)
 729 ".align 1\n"
 730 "loc_fc07baae:\n"
 731 "    bl      sub_fc07b9bc\n"
 732 "    bl      update_url\n"      // +
 733 "    b       loc_fc07bad6\n"
 734 "loc_fc07bab4:\n"
 735 "    bl      sub_fc07b918\n"
 736 "    b       loc_fc07bad6\n"
 737 "loc_fc07baba:\n"
 738 "    bl      sub_fc07b848\n"
 739 "    b       loc_fc07bad6\n"
 740 "loc_fc07bac0:\n"
 741 "    bl      sub_fc07b70e\n"
 742 "    b       loc_fc07bad6\n"
 743 "loc_fc07bac6:\n"
 744 "    bl      sub_fc07b5b8\n"
 745 "    b       loc_fc07bad6\n"
 746 "loc_fc07bacc:\n"
 747 "    bl      sub_fc07bb5c\n"
 748 "    b       loc_fc07bad6\n"
 749 "loc_fc07bad2:\n"
 750 "    bl      sub_fc07b4d0\n"
 751 "loc_fc07bad6:\n"
 752 "    lsls    r0, r4, #0x1f\n"
 753 "    beq     loc_fc07ba70\n"
 754 "    pop     {r3, r4, r5, r6, r7, pc}\n"
 755     );
 756 }
 757 #endif // sx280