root/platform/ixus175_elph180/sub/100c/boot.c

DEFINITIONS

1. CreateTask_spytask
2. boot
3. CreateTask_my
4. sub_FF8203C4_my
5. sub_FF822914_my
6. sub_FF824734_my
7. sub_FF827DB8_my
8. task_Startup_my
9. taskcreatePhySw_my
10. init_file_modules_task
11. kbd_p1_f_cont_my
12. sub_FF82BA18_my
13. init_required_fw_features

   1 /*
   2  * boot.c - auto-generated by CHDK code_gen.
   3  */
   4 #include "lolevel.h"
   5 #include "platform.h"
   6 #include "core.h"
   7 #include "dryos31.h"
   9 #define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
  11 const char * const new_sa = &_end;
  13 /*----------------------------------------------------------------------
  14         CreateTask_spytask
  15 -----------------------------------------------------------------------*/
  16 void CreateTask_spytask()
  17 {
_CreateTask("SpyTask", 0x19, 0x2000, core_spytask, 0);
  19 }
  21 /*----------------------------------------------------------------------
  22         boot()
  23 
  24         Main entry point for the CHDK code
  25 -----------------------------------------------------------------------*/
  27 /*************************************************************/
  28 //** boot @ 0xFF82000C - 0xFF82017C, length=93
  29 void __attribute__((naked,noinline)) boot() {
  30 asm volatile (
  31 "    LDR     R1, =0xC0410000 \n"
  32 "    MOV     R0, #0 \n"
  33 "    STR     R0, [R1] \n"
  34 "    MOV     R1, #0x78 \n"
  35 "    MCR     p15, 0, R1, c1, c0 \n"
  36 "    MOV     R1, #0 \n"
  37 "    MCR     p15, 0, R1, c7, c10, 4 \n"
  38 "    MCR     p15, 0, R1, c7, c5 \n"
  39 "    MCR     p15, 0, R1, c7, c6 \n"
  40 "    MOV     R0, #0x3D \n"
  41 "    MCR     p15, 0, R0, c6, c0 \n"
  42 "    MOV     R0, #0xC000002F \n"
  43 "    MCR     p15, 0, R0, c6, c1 \n"
  44 "    MOV     R0, #0x35 \n"
  45 "    MCR     p15, 0, R0, c6, c2 \n"
  46 "    MOV     R0, #0x40000035 \n"
  47 "    MCR     p15, 0, R0, c6, c3 \n"
  48 "    MOV     R0, #0x80000017 \n"
  49 "    MCR     p15, 0, R0, c6, c4 \n"
  50 "    LDR     R0, =0xFF80002D \n"
  51 "    MCR     p15, 0, R0, c6, c5 \n"
  52 "    MOV     R0, #0x34 \n"
  53 "    MCR     p15, 0, R0, c2, c0 \n"
  54 "    MOV     R0, #0x34 \n"
  55 "    MCR     p15, 0, R0, c2, c0, 1 \n"
  56 "    MOV     R0, #0x34 \n"
  57 "    MCR     p15, 0, R0, c3, c0 \n"
  58 "    LDR     R0, =0x3333330 \n"
  59 "    MCR     p15, 0, R0, c5, c0, 2 \n"
  60 "    LDR     R0, =0x3333330 \n"
  61 "    MCR     p15, 0, R0, c5, c0, 3 \n"
  62 "    MRC     p15, 0, R0, c1, c0 \n"
  63 "    ORR     R0, R0, #0x1000 \n"
  64 "    ORR     R0, R0, #4 \n"
  65 "    ORR     R0, R0, #1 \n"
  66 "    MCR     p15, 0, R0, c1, c0 \n"
  67 "    MOV     R1, #0x80000006 \n"
  68 "    MCR     p15, 0, R1, c9, c1 \n"
  69 "    MOV     R1, #6 \n"
  70 "    MCR     p15, 0, R1, c9, c1, 1 \n"
  71 "    MRC     p15, 0, R1, c1, c0 \n"
  72 "    ORR     R1, R1, #0x50000 \n"
  73 "    MCR     p15, 0, R1, c1, c0 \n"
  74 "    LDR     R2, =0xC0200000 \n"
  75 "    MOV     R1, #1 \n"
  76 "    STR     R1, [R2, #0x10C] \n"
  77 "    MVN     R1, #0 \n"
  78 "    STR     R1, [R2, #0xC] \n"
  79 "    STR     R1, [R2, #0x1C] \n"
  80 "    STR     R1, [R2, #0x2C] \n"
  81 "    STR     R1, [R2, #0x3C] \n"
  82 "    STR     R1, [R2, #0x4C] \n"
  83 "    STR     R1, [R2, #0x5C] \n"
  84 "    STR     R1, [R2, #0x6C] \n"
  85 "    STR     R1, [R2, #0x7C] \n"
  86 "    STR     R1, [R2, #0x8C] \n"
  87 "    STR     R1, [R2, #0x9C] \n"
  88 "    STR     R1, [R2, #0xAC] \n"
  89 "    STR     R1, [R2, #0xBC] \n"
  90 "    STR     R1, [R2, #0xCC] \n"
  91 "    STR     R1, [R2, #0xDC] \n"
  92 "    STR     R1, [R2, #0xEC] \n"
  93 "    STR     R1, [R2, #0xFC] \n"
  94 "    LDR     R1, =0xC0400008 \n"
  95 "    LDR     R2, =0x430005 \n"
  96 "    STR     R2, [R1] \n"
  97 "    MOV     R1, #1 \n"
  98 "    LDR     R2, =0xC0243100 \n"
  99 "    STR     R2, [R1] \n"
 100 "    LDR     R2, =0xC0242010 \n"
 101 "    LDR     R1, [R2] \n"
 102 "    ORR     R1, R1, #1 \n"
 103 "    STR     R1, [R2] \n"
 104 "    LDR     R0, =0xFFD2B31C \n"
 105 "    LDR     R1, =0x6B1000 \n"
 106 "    LDR     R3, =0x6C1736 \n"
 108 "loc_FF82013C:\n"
 109 "    CMP     R1, R3 \n"
 110 "    LDRCC   R2, [R0], #4 \n"
 111 "    STRCC   R2, [R1], #4 \n"
 112 "    BCC     loc_FF82013C \n"
 113 "    LDR     R0, =0xFFD1D850 \n"
 114 "    LDR     R1, =0x1900 \n"
 115 "    LDR     R3, =0xF3CC \n"
 117 "loc_FF820158:\n"
 118 "    CMP     R1, R3 \n"
 119 "    LDRCC   R2, [R0], #4 \n"
 120 "    STRCC   R2, [R1], #4 \n"
 121 "    BCC     loc_FF820158 \n"
 122 "    LDR     R1, =0x1899D8 \n"
 123 "    MOV     R2, #0 \n"
 125 "loc_FF820170:\n"
 126 "    CMP     R3, R1 \n"
 127 "    STRCC   R2, [R3], #4 \n"
 128 "    BCC     loc_FF820170 \n"
 129 /* CreateTask is located in ROM
 130  * Note: task function is the first argument
 131  */
 132 // Install CreateTask_low patch
 133 "    LDR     R0, =patch_CreateTask\n"   // Patch data
 134 "    LDM     R0, {R1,R2}\n"             // Get two patch instructions
 135 "    LDR     R0, =hook_CreateTask\n"    // Address to patch
 136 "    STM     R0, {R1,R2}\n"             // Store patch instructions
 138 "    B       sub_FF8203C4_my \n"  // --> Patched. Old value = 0xFF8203C4.
 140 "patch_CreateTask:\n"
 141 "    LDR     PC, [PC,#-0x4]\n"          // Do jump to absolute address CreateTask_my
 142 "    .long   CreateTask_my\n"
 143 );
 144 }
 146 /*************************************************************/
 147 //** CreateTask_my @ 0x006B5714 - 0x006B5718, length=2
 148 void __attribute__((naked,noinline)) CreateTask_my() {
 149 asm volatile (
 150         "    STMFD   SP!, {R0}\n"
 151 //R3 = Pointer to task function to create
 153 /*** INSTALL capt_seq_task() hook ***/
 154 "    LDR     R0, =task_CaptSeq\n"       // DryOS original code function ptr.
 155 "    CMP     R0, R3\n"                  // is the given taskptr equal to our searched function?
 156 "    LDREQ   R3, =capt_seq_task\n"      // if so replace with our task function base ptr.
 157 "    BEQ     exitHook\n"                // below compares not necessary if this check has found something.
 159 /*** INSTALL exp_drv_task() hook ***/
 160 /*"    LDR     R0, =task_ExpDrv\n"
 161 "    CMP     R0, R3\n"
 162 "    LDREQ   R3, =exp_drv_task\n"
 163 "    BEQ     exitHook\n"
 164 */
 166 /*** INSTALL filewrite() hook ***/
 167 "    LDR     R0, =task_FileWrite\n"
 168 "    CMP     R0, R3\n"
 169 "    LDREQ   R3, =filewritetask\n"
 170 "    BEQ     exitHook\n"
 172 /*** INSTALL movie_record_task() hook ***/
 173 /*"    LDR     R0, =task_MovieRecord\n"
 174 "    CMP     R0, R3\n"
 175 "    LDREQ   R3, =movie_record_task\n"
 176 "    BEQ     exitHook\n"
 177 */
 179 /*** INSTALL liveimage_task() hook ***/
 180 /*"    LDR     R0, =task_LiveImageTask\n"
 181 "    CMP     R0, R3\n"
 182 "    LDREQ   R3, =liveimage_task\n"
 183 "    BEQ     exitHook\n"
 184 */
 186 /*** INSTALL init_file_modules_task() hook ***/
 187 "    LDR     R0, =task_InitFileModules\n"
 188 "    CMP     R0, R3\n"
 189 "    LDREQ   R3, =init_file_modules_task\n"
 191 "exitHook:\n" 
 192 // restore overwritten registers
 193 "    LDMFD   SP!, {R0}\n"
 194 // Execute overwritten instructions from original code, then jump to firmware
 195 "    STMFD   SP!, {R1-R5,LR} \n"
 196 "    MOV     R4, R2 \n"
 197 "    LDR     PC, =0x006B571C \n"  // Continue in firmware
 198 );
 199 }
 201 /*************************************************************/
 202 //** sub_FF8203C4_my @ 0xFF8203C4 - 0xFF82042C, length=27
 203 void __attribute__((naked,noinline)) sub_FF8203C4_my() {
 205    // Replacement of sub_ for correct power-on.
 206    // (short press = playback mode, long press = record mode)
 207    // look at power-on switch sub_FF86B864 
 208    // value and pointer from FF82BE5C
 209    // GPIO  from FF812630 it above dancing address
 210    *(int*)(0x2BD4 + 4) = (*(int*)0xC022F484)&0x20000 ? 0x400000 : 0x200000; //blackhole
 211    //*(int*)(0x2cf4+0x8) = (*(int*)0xc022f48c) & 0x80000 ? 0x400000 : 0x200000;
 212 asm volatile (
 213 "    LDR     R0, =0xFF82043C \n"
 214 "    MOV     R1, #0 \n"
 215 "    LDR     R3, =0xFF820474 \n"
 217 "loc_FF8203D0:\n"
 218 "    CMP     R0, R3 \n"
 219 "    LDRCC   R2, [R0], #4 \n"
 220 "    STRCC   R2, [R1], #4 \n"
 221 "    BCC     loc_FF8203D0 \n"
 222 "    LDR     R0, =0xFF820474 \n"
 223 "    MOV     R1, #0x1E0 \n"
 224 "    LDR     R3, =0xFF82064C \n"
 226 "loc_FF8203EC:\n"
 227 "    CMP     R0, R3 \n"
 228 "    LDRCC   R2, [R0], #4 \n"
 229 "    STRCC   R2, [R1], #4 \n"
 230 "    BCC     loc_FF8203EC \n"
 231 "    MOV     R0, #0xD2 \n"
 232 "    MSR     CPSR_cxsf, R0 \n"
 233 "    MOV     SP, #0x1000 \n"
 234 "    MOV     R0, #0xD3 \n"
 235 "    MSR     CPSR_cxsf, R0 \n"
 236 "    MOV     SP, #0x1000 \n"
 237 "    LDR     R0, =0x3B8 \n"
 238 "    LDR     R2, =0xEEEEEEEE \n"
 239 "    MOV     R3, #0x1000 \n"
 241 "loc_FF820420:\n"
 242 "    CMP     R0, R3 \n"
 243 "    STRCC   R2, [R0], #4 \n"
 244 "    BCC     loc_FF820420 \n"
 245 "    B       sub_FF822914_my \n"  // --> Patched. Old value = 0xFF822914.
 246 );
 247 }
 249 /*************************************************************/
 250 //** sub_FF822914_my @ 0xFF822914 - 0xFF822A1C, length=67
 251 void __attribute__((naked,noinline)) sub_FF822914_my() {
 252 asm volatile (
 253 "    LDR     R0, =0x1A64 \n"
 254 "    STR     LR, [SP, #-4]! \n"
 255 "    SUB     SP, SP, #0x7C \n"
 256 "    MOV     R1, #0x80000 \n"
 257 "    STR     R1, [R0] \n"
 258 "    LDR     R0, =0x40BEE980 \n"
 259 "    LDR     R1, =0x1A68 \n"
 260 "    STR     R0, [R1] \n"
 261 "    LDR     R1, =0x1A6C \n"
 262 "    ADD     R0, R0, #0x2000 \n"
 263 "    STR     R0, [R1] \n"
 264 "    MOV     R1, #0x78 \n"
 265 "    ADD     R0, SP, #4 \n"
 266 "    BL      sub_006BD2AC \n"
 267 "    MOV     R0, #0x84000 \n"
 268 "    STR     R0, [SP, #8] \n"
 270 #if defined(CHDK_NOT_IN_CANON_HEAP) // use original heap offset if CHDK is loaded in high memory
 271 "    LDR     R0, =0x1899D8 \n"
 272 #else
 273 "    LDR     R0, =new_sa\n"   // otherwise use patched value
 274 "    LDR     R0, [R0]\n"      //
 275 #endif
 277 "    LDR     R2, =0x580DD8 \n"
 278 "    STR     R0, [SP, #0xC] \n"
 279 "    SUB     R0, R2, R0 \n"
 280 "    STR     R0, [SP, #0x10] \n"
 281 "    MOV     R0, #0x22 \n"
 282 "    STR     R0, [SP, #0x1C] \n"
 283 "    MOV     R0, #0x7C \n"
 284 "    STR     R0, [SP, #0x20] \n"
 285 "    LDR     R0, =0x205 \n"
 286 "    LDR     R1, =0x58A000 \n"
 287 "    STR     R2, [SP, #0x14] \n"
 288 "    STR     R0, [SP, #0x24] \n"
 289 "    MOV     R0, #0x96 \n"
 290 "    STR     R1, [SP, #4] \n"
 291 "    STR     R1, [SP, #0x18] \n"
 292 "    STR     R0, [SP, #0x28] \n"
 293 "    MOV     R0, #0xB4 \n"
 294 "    STR     R0, [SP, #0x2C] \n"
 295 "    MOV     R0, #0x64 \n"
 296 "    STR     R0, [SP, #0x30] \n"
 297 "    MOV     R0, #0 \n"
 298 "    STR     R0, [SP, #0x34] \n"
 299 "    STR     R0, [SP, #0x38] \n"
 300 "    STR     R0, [SP, #0x3C] \n"
 301 "    MOV     R0, #0x10 \n"
 302 "    STR     R0, [SP, #0x60] \n"
 303 "    MOV     R0, #0x1000 \n"
 304 "    STR     R0, [SP, #0x64] \n"
 305 "    MOV     R0, #0x100 \n"
 306 "    STR     R0, [SP, #0x68] \n"
 307 "    MOV     R0, #0x2000 \n"
 308 "    STR     R0, [SP, #0x6C] \n"
 309 "    LDR     R1, =sub_FF824734_my \n"  // --> Patched. Old value = 0xFF824734.
 310 "    MOV     R2, #0 \n"
 311 "    ADD     R0, SP, #4 \n"
 312 "    BL      sub_006B1BC4 \n"
 313 "    ADD     SP, SP, #0x7C \n"
 314 "    LDR     PC, [SP], #4 \n"
 315 );
 316 }
 318 /*************************************************************/
 319 //** sub_FF824734_my @ 0xFF824734 - 0xFF8247CC, length=39
 320 void __attribute__((naked,noinline)) sub_FF824734_my() {
 321 asm volatile (
 322 "    STMFD   SP!, {R4,LR} \n"
 323 "    LDR     R4, =0xFF8247F0 /*'/_term'*/ \n"
 324 "    BL      sub_FF820848 \n"
 325 "    LDR     R1, =0x1A64 \n"
 326 "    LDR     R0, =0x19F8 \n"
 327 "    LDR     R1, [R1] \n"
 328 "    LDR     R0, [R0] \n"
 329 "    ADD     R1, R1, #0x10 \n"
 330 "    CMP     R0, R1 \n"
 331 "    LDRCC   R0, =0xFF824800 /*'USER_MEM size checking'*/ \n"
 332 "    BLCC    _err_init_task \n"
 333 "    BL      sub_FF823520 \n"
 334 "    CMP     R0, #0 \n"
 335 "    LDRLT   R0, =0xFF824818 /*'dmSetup'*/ \n"
 336 "    BLLT    _err_init_task \n"
 337 "    BL      sub_FF822528 \n"
 338 "    CMP     R0, #0 \n"
 339 "    LDRLT   R0, =0xFF824820 /*'termDriverInit'*/ \n"
 340 "    BLLT    _err_init_task \n"
 341 "    MOV     R0, R4 \n"
 342 "    BL      sub_FF822608 \n"
 343 "    CMP     R0, #0 \n"
 344 "    LDRLT   R0, =0xFF824830 /*'termDeviceCreate'*/ \n"
 345 "    BLLT    _err_init_task \n"
 346 "    MOV     R0, R4 \n"
 347 "    BL      sub_FF822140 \n"
 348 "    CMP     R0, #0 \n"
 349 "    LDRLT   R0, =0xFF824844 /*'stdioSetup'*/ \n"
 350 "    BLLT    _err_init_task \n"
 351 "    BL      sub_FF824DA0 \n"
 352 "    CMP     R0, #0 \n"
 353 "    LDRLT   R0, =0xFF824850 /*'stdlibSetup'*/ \n"
 354 "    BLLT    _err_init_task \n"
 355 "    BL      sub_FF820F4C \n"
 356 "    CMP     R0, #0 \n"
 357 "    LDRLT   R0, =0xFF82485C /*'extlib_setup'*/ \n"
 358 "    BLLT    _err_init_task \n"
 359 "    LDMFD   SP!, {R4,LR} \n"
 360 "    B       sub_FF827DB8_my \n"  // --> Patched. Old value = 0xFF827DB8.
 361 );
 362 }
 364 /*************************************************************/
 365 //** sub_FF827DB8_my @ 0xFF827DB8 - 0xFF827E08, length=21
 366 void __attribute__((naked,noinline)) sub_FF827DB8_my() {
 367 asm volatile (
 368 "    STMFD   SP!, {R3,LR} \n"
 369 //"  BL      _sub_FF898FEC \n"  // --> Nullsub call removed.
 370 "    BL      sub_FF82CD0C /*_IsNormalCameraMode_FW*/ \n"
 371 //"  BL      _sub_FF82BE10 \n"  // See: http://chdk.setepontos.com/index.php?topic=12321.msg121619#msg121619
 372 //"  CMP     R0, #0 \n"
 373 //"  BNE     loc_FF827DD8 \n"
 374 //"  BL      _sub_FF82B58C \n"
 376 "loc_FF827DD4:\n"
 377 //"  B       loc_FF827DD4 \n"
 379 "loc_FF827DD8:\n"
 380 "    BL      sub_006B8C18 \n"
 381 "    LDR     R1, =0x60E000 \n"
 382 "    MOV     R0, #0 \n"
 383 "    BL      sub_FF83720C \n"
 384 "    MOV     R3, #0 \n"
 385 "    STR     R3, [SP] \n"
 386 "    LDR     R3, =task_Startup_my \n"  // --> Patched. Old value = 0xFF827D50.
 387 "    MOV     R2, #0 \n"
 388 "    MOV     R1, #0x19 \n"
 389 "    LDR     R0, =0xFF827E14 /*'Startup'*/ \n"
 390 "    BL      _CreateTask \n"
 391 "    MOV     R0, #0 \n"
 392 "    LDMFD   SP!, {R3,PC} \n"
 393 );
 394 }
 396 /*************************************************************/
 397 //** task_Startup_my @ 0xFF827D50 - 0xFF827DB4, length=26
 398 void __attribute__((naked,noinline)) task_Startup_my() {
 399 asm volatile (
 400 "    STMFD   SP!, {R4,LR} \n"
 401 "    BL      sub_FF822CC4 \n"
 402 "    BL      sub_FF82C288 \n"
 403 "    BL      sub_FF82B538 \n"
 404 //"  BL      _sub_FF86BF2C \n"  // --> Nullsub call removed.
 405 "    BL      sub_FF836FC8 \n"
 406 //"  BL      _sub_FF836E88 \n"  // load DISKBOOT.BIN
 407 "    BL      sub_FF83711C \n"
 408 "    BL      sub_FF8372E0 \n"
 409 //"  BL      _sub_FF837110 \n"  // --> Nullsub call removed.
 410 "    BL      sub_FF836FFC \n"
 411 "    BL      sub_FF832F50 \n"
 412 "    BL      sub_FF8372E8 \n"
 413 "    BL      CreateTask_spytask\n" // added
 414 "    BL      taskcreatePhySw_my \n"  // --> Patched. Old value = 0xFF82BCBC.
 415 "    BL      init_required_fw_features\n" // added
 416 "    BL      sub_FF830F8C \n"
 417 "    BL      sub_FF8B07C8 \n"
 418 "    BL      sub_FF829188 \n"
 419 "    BL      sub_FF82B0B4 \n"
 420 "    BL      sub_FF836B50 \n"
 421 "    BL      sub_FF82B4EC \n"
 422 "    BL      sub_FF82B048 \n"
 423 //"  BL      _sub_FF837114 \n"  // --> Nullsub call removed.
 424 "    BL      sub_FF829F0C \n"
 425 "    BL      sub_FF82B004 \n"
 426 "    LDMFD   SP!, {R4,LR} \n"
 427 "    B       sub_FF822E14 \n"
 428 );
 429 }
 431 /*************************************************************/
 432 //** taskcreatePhySw_my @ 0xFF82BCBC - 0xFF82BD00, length=18
 433 void __attribute__((naked,noinline)) taskcreatePhySw_my() {
 434 asm volatile (
 435 "    STMFD   SP!, {R3-R5,LR} \n"
 436 "    BL      sub_FF835DB8 \n"
 437 "    BL      sub_FF82CC44 /*_IsFactoryMode_FW*/ \n"
 438 "    CMP     R0, #0 \n"
 439 "    BLEQ    sub_FF835D20 /*_OpLog.Start_FW*/ \n"
 440 "    LDR     R4, =0x1C18 \n"
 441 "    LDR     R0, [R4, #4] \n"
 442 "    CMP     R0, #0 \n"
 443 "    BNE     loc_FF82BD00 \n"
 444 "    MOV     R3, #0 \n"
 445 "    STR     R3, [SP] \n"
 446 "    LDR     R3, =mykbd_task \n"  // --> Patched. Old value = 0xFF82BC88.
 447 "    MOV     R2, #0x2000 \n"  // --> Patched. Old value = 0x800. stack size for new task_PhySw so we don't have to do stack switch
 448 "    MOV     R1, #0x17 \n"
 449 "    LDR     R0, =0xFF82BF64 /*'PhySw'*/ \n"
 450 "    BL      sub_006B7C84 /*_CreateTaskStrictly*/ \n"
 451 "    STR     R0, [R4, #4] \n"
 453 "loc_FF82BD00:\n"
 454 "    LDMFD   SP!, {R3-R5,PC} \n"
 455 );
 456 }
 458 /*************************************************************/
 459 //** init_file_modules_task @ 0xFF8598A8 - 0xFF8598E4, length=16
 460 void __attribute__((naked,noinline)) init_file_modules_task() {
 461 asm volatile (
 462 "    STMFD   SP!, {R4-R6,LR} \n"
 463 "    MOV     R0, #6 \n"
 464 //"  BL      _sub_FF829478 \n"  // --> Nullsub call removed.
 465 "    BL      sub_FF89FCF4 \n"
 466 "    LDR     R5, =0x5006 \n"
 467 "    MOVS    R4, R0 \n"
 468 "    MOVNE   R1, #0 \n"
 469 "    MOVNE   R0, R5 \n"
 470 "    BLNE    _PostLogicalEventToUI \n"
 471 "    BL      sub_FF89FD24 \n"
 472 "    BL      core_spytask_can_start\n"  // CHDK: Set "it's-safe-to-start" flag for spytask
 473 "    CMP     R4, #0 \n"
 474 "    LDMNEFD SP!, {R4-R6,PC} \n"
 475 "    MOV     R0, R5 \n"
 476 "    LDMFD   SP!, {R4-R6,LR} \n"
 477 "    MOV     R1, #1 \n"
 478 "    B       _PostLogicalEventToUI \n"
 479 );
 480 }
 482 /*************************************************************/
 483 //** kbd_p1_f_cont_my @ 0xFF82C1B0 - 0xFF82C1F0, length=17
 484 void __attribute__((naked,noinline)) kbd_p1_f_cont_my() {
 485 asm volatile (
 486 "    LDR     R2, =0x10198 \n"
 487 "    MOV     R0, #2 \n"
 488 "    ADD     R3, R2, #0x24 \n"
 489 "    MOV     R4, SP \n"
 491 "loc_FF82C1C0:\n"
 492 "    ADD     R1, R3, R0, LSL#2 \n"
 493 "    LDR     R12, [R2, R0, LSL#2] \n"
 494 "    LDR     R6, [R1, #0xC] \n"
 495 "    LDR     R1, [R1, #0x18] \n"
 496 "    AND     R12, R12, R6 \n"
 497 "    EOR     R1, R1, R12 \n"
 498 "    STR     R1, [R4, R0, LSL#2] \n"
 499 "    SUBS    R0, R0, #1 \n"
 500 "    BPL     loc_FF82C1C0 \n"
 501 "    bl      xtra_kbd_cb \n"            // + returns part of physw_status when overriding, -1 otherwise
 502 "    mov     r3, r0 \n"                 // + provide new argument for the next function
 503 "    LDR     R2, =0x101B0 \n"
 504 "    MOV     R0, SP \n"
 505 "    SUB     R1, R2, #0xC \n"
 506 "    BL      sub_FF82BA18_my \n"  // --> Patched. Old value = 0xFF82BA18.
 507 "    LDR     PC, =0xFF82C1F4 \n"  // Continue in firmware
 508 );
 509 }
 511 /*************************************************************/
 512 //** sub_FF82BA18_my @ 0xFF82BA18 - 0xFF82BA20, length=3
 513 void __attribute__((naked,noinline)) sub_FF82BA18_my() {
 514 asm volatile (
 515 "    STMFD   SP!, {R0-R12,LR} \n"
 516 "    MOV     R5, R0 \n"
 517 //"  MVN     R0, #0 \n"  // - should be (physw_status[2] & 0xffff) when overriding, -1 otherwise. see @0xFF86BA38 in 100c
 518 "    mov     r0, r3 \n"  // + (new argument to allow passing our variable)
 519 "    LDR     PC, =0xFF82BA24 \n"  // Continue in firmware
 520 );
 521 }
 523 /*
 524     *** TEMPORARY workaround ***
 525     Init stuff to avoid asserts on cameras running DryOS r54+
 526     Execute this only once
 527  */
 528 void init_required_fw_features(void) {
 529     extern void _init_focus_eventflag();
 530     extern void _init_nd_eventflag();
 531     extern void _init_nd_semaphore();
 532     //extern void _init_zoom_semaphore(); // for MoveZoomLensWithPoint
_init_focus_eventflag();
_init_nd_eventflag();
_init_nd_semaphore();