root/platform/ixus185_elph185/sub/100a/boot.c

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DEFINITIONS

This source file includes following definitions.
  1. CreateTask_spytask
  2. boot
  3. CreateTask_low_my
  4. sub_FF8203C4_my
  5. sub_FF822A0C_my
  6. sub_FF824830_my
  7. sub_FF827F34_my
  8. task_Startup_my
  9. taskcreatePhySw_my
  10. init_file_modules_task
  11. kbd_p1_f_cont_my
  12. sub_FF82C724_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"
   8 
   9 #define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
  10 
  11 const char * const new_sa = &_end;
  12 
  13 /*----------------------------------------------------------------------
  14     CreateTask_spytask
  15 -----------------------------------------------------------------------*/
  16 void CreateTask_spytask()
  17 {
  18     _CreateTask("SpyTask", 0x19, 0x2000, core_spytask, 0);
  19 }
  20 
  21 /*----------------------------------------------------------------------
  22     boot()
  23 
  24     Main entry point for the CHDK code
  25 -----------------------------------------------------------------------*/
  26 
  27 
  28 
  29 /*************************************************************/
  30 //** boot @ 0xFF82000C - 0xFF82017C, length=93
  31 void __attribute__((naked,noinline)) boot() {
  32 asm volatile (
  33 "    LDR     R1, =0xC0410000 \n"
  34 "    MOV     R0, #0 \n"
  35 "    STR     R0, [R1] \n"
  36 "    MOV     R1, #0x78 \n"
  37 "    MCR     p15, 0, R1, c1, c0 \n"
  38 "    MOV     R1, #0 \n"
  39 "    MCR     p15, 0, R1, c7, c10, 4 \n"
  40 "    MCR     p15, 0, R1, c7, c5 \n"
  41 "    MCR     p15, 0, R1, c7, c6 \n"
  42 "    MOV     R0, #0x3D \n"
  43 "    MCR     p15, 0, R0, c6, c0 \n"
  44 "    MOV     R0, #0xC000002F \n"
  45 "    MCR     p15, 0, R0, c6, c1 \n"
  46 "    MOV     R0, #0x35 \n"
  47 "    MCR     p15, 0, R0, c6, c2 \n"
  48 "    MOV     R0, #0x40000035 \n"
  49 "    MCR     p15, 0, R0, c6, c3 \n"
  50 "    MOV     R0, #0x80000017 \n"
  51 "    MCR     p15, 0, R0, c6, c4 \n"
  52 "    LDR     R0, =0xFF80002D \n"
  53 "    MCR     p15, 0, R0, c6, c5 \n"
  54 "    MOV     R0, #0x34 \n"
  55 "    MCR     p15, 0, R0, c2, c0 \n"
  56 "    MOV     R0, #0x34 \n"
  57 "    MCR     p15, 0, R0, c2, c0, 1 \n"
  58 "    MOV     R0, #0x34 \n"
  59 "    MCR     p15, 0, R0, c3, c0 \n"
  60 "    LDR     R0, =0x3333330 \n"
  61 "    MCR     p15, 0, R0, c5, c0, 2 \n"
  62 "    LDR     R0, =0x3333330 \n"
  63 "    MCR     p15, 0, R0, c5, c0, 3 \n"
  64 "    MRC     p15, 0, R0, c1, c0 \n"
  65 "    ORR     R0, R0, #0x1000 \n"
  66 "    ORR     R0, R0, #4 \n"
  67 "    ORR     R0, R0, #1 \n"
  68 "    MCR     p15, 0, R0, c1, c0 \n"
  69 "    MOV     R1, #0x80000006 \n"
  70 "    MCR     p15, 0, R1, c9, c1 \n"
  71 "    MOV     R1, #6 \n"
  72 "    MCR     p15, 0, R1, c9, c1, 1 \n"
  73 "    MRC     p15, 0, R1, c1, c0 \n"
  74 "    ORR     R1, R1, #0x50000 \n"
  75 "    MCR     p15, 0, R1, c1, c0 \n"
  76 "    LDR     R2, =0xC0200000 \n"
  77 "    MOV     R1, #1 \n"
  78 "    STR     R1, [R2, #0x10C] \n"
  79 "    MVN     R1, #0 \n"
  80 "    STR     R1, [R2, #0xC] \n"
  81 "    STR     R1, [R2, #0x1C] \n"
  82 "    STR     R1, [R2, #0x2C] \n"
  83 "    STR     R1, [R2, #0x3C] \n"
  84 "    STR     R1, [R2, #0x4C] \n"
  85 "    STR     R1, [R2, #0x5C] \n"
  86 "    STR     R1, [R2, #0x6C] \n"
  87 "    STR     R1, [R2, #0x7C] \n"
  88 "    STR     R1, [R2, #0x8C] \n"
  89 "    STR     R1, [R2, #0x9C] \n"
  90 "    STR     R1, [R2, #0xAC] \n"
  91 "    STR     R1, [R2, #0xBC] \n"
  92 "    STR     R1, [R2, #0xCC] \n"
  93 "    STR     R1, [R2, #0xDC] \n"
  94 "    STR     R1, [R2, #0xEC] \n"
  95 "    STR     R1, [R2, #0xFC] \n"
  96 "    LDR     R1, =0xC0400008 \n"
  97 "    LDR     R2, =0x430005 \n"
  98 "    STR     R2, [R1] \n"
  99 "    MOV     R1, #1 \n"
 100 "    LDR     R2, =0xC0243100 \n"
 101 "    STR     R2, [R1] \n"
 102 "    LDR     R2, =0xC0242010 \n"
 103 "    LDR     R1, [R2] \n"
 104 "    ORR     R1, R1, #1 \n"
 105 "    STR     R1, [R2] \n"
 106 "    LDR     R0, =0xFFD401CC \n"
 107 "    LDR     R1, =0x6B1000 \n"
 108 "    LDR     R3, =0x6BEA0A \n"
 109 
 110 "loc_FF82013C:\n"
 111 "    CMP     R1, R3 \n"
 112 "    LDRCC   R2, [R0], #4 \n"
 113 "    STRCC   R2, [R1], #4 \n"
 114 "    BCC     loc_FF82013C \n"
 115 "    LDR     R0, =0xFFD3270C \n"
 116 "    LDR     R1, =0x1900 \n"
 117 "    LDR     R3, =0xF3C0 \n"
 118 
 119 "loc_FF820158:\n"
 120 "    CMP     R1, R3 \n"
 121 "    LDRCC   R2, [R0], #4 \n"
 122 "    STRCC   R2, [R1], #4 \n"
 123 "    BCC     loc_FF820158 \n"
 124 "    LDR     R1, =0x18AA24 \n"
 125 "    MOV     R2, #0 \n"
 126 
 127 "loc_FF820170:\n"
 128 "    CMP     R3, R1 \n"
 129 "    STRCC   R2, [R3], #4 \n"
 130 "    BCC     loc_FF820170 \n"
 131 /* CreateTask is located in ROM, patching the lower level CreateTask_low function instead
 132  * Note: task function is the first argument
 133 */
 134 // Install CreateTask_low patch
 135 "    LDR     R0, =patch_CreateTask_low\n"   // Patch data
 136 "    LDM     R0, {R1,R2}\n"             // Get two patch instructions
 137 "    LDR     R0, =hook_CreateTask_low\n"    // Address to patch
 138 "    STM     R0, {R1,R2}\n"             // Store patch instructions
 139 
 140 "    B       sub_FF8203C4_my \n"  // --> Patched. Old value = 0xFF8203C4.
 141 
 142 "patch_CreateTask_low:\n"
 143 "    LDR     PC, [PC,#-0x4]\n"          // Do jump to absolute address CreateTask_my
 144 "    .long   CreateTask_low_my\n"
 145 );
 146 }
 147 
 148 /*************************************************************/
 149 //** CreateTask_low_my @ 0x006B15A0 - 0x006B15A4, length=2
 150 void __attribute__((naked,noinline)) CreateTask_low_my() {
 151 asm volatile (
 152 " STMFD SP!, {R1}\n"
 153 //R0 = Pointer to task function to create
 154 
 155 /*** INSTALL capt_seq_task() hook ***/
 156 "    LDR     R1, =task_CaptSeq\n"       // DryOS original code function ptr.
 157 "    CMP     R1, R0\n"                  // is the given taskptr equal to our searched function?
 158 "    LDREQ   R0, =capt_seq_task\n"      // if so replace with our task function base ptr.
 159 "    BEQ     exitHook\n"                // below compares not necessary if this check has found something.
 160 
 161 /*** INSTALL exp_drv_task() hook ***/
 162 //"    LDR     R1, =task_ExpDrv\n"
 163 //"    CMP     R1, R0\n"
 164 //"    LDREQ   R0, =exp_drv_task\n"
 165 //"    BEQ     exitHook\n"
 166 
 167 /*** INSTALL filewrite() hook ***/
 168 "    LDR     R1, =task_FileWrite\n"
 169 "    CMP     R1, R0\n"
 170 "    LDREQ   R0, =filewritetask\n"
 171 "    BEQ     exitHook\n"
 172 
 173 /*** INSTALL movie_record_task() hook ***/
 174 //"    LDR     R1, =task_MovieRecord\n"
 175 //"    CMP     R1, R0\n"
 176 //"    LDREQ   R0, =movie_record_task\n"
 177 //"    BEQ exitHook\n"
 178 
 179 /*** INSTALL liveimage_task() hook ***/
 180 //"    LDR     R1, =task_LiveImageTask\n"
 181 //"    CMP     R1, R0\n"
 182 //"    LDREQ   R0, =liveimage_task\n"
 183 //"    BEQ     exitHook\n"
 184 
 185 /*** INSTALL init_file_modules_task() hook ***/
 186 "   LDR     R1, =task_InitFileModules\n"
 187 "   CMP     R1, R0\n"
 188 "   LDREQ   R0, =init_file_modules_task\n"
 189 
 190 "exitHook:\n" 
 191 // restore overwritten registers
 192 "    LDMFD SP!, {R1}\n"
 193 // Execute overwritten instructions from original code, then jump to firmware
 194 "    STMFD   SP!, {R4-R8,LR} \n"
 195 "    CMP     R3, #0 \n"
 196 "    LDR     PC, =0x006B15A8 \n"  // Continue in firmware
 197 );
 198 }
 199 
 200 /*************************************************************/
 201 //** sub_FF8203C4_my @ 0xFF8203C4 - 0xFF82042C, length=27
 202 void __attribute__((naked,noinline)) sub_FF8203C4_my() {
 203 
 204     //Replacement of sub_ for correct power-on.
 205     //(short press = playback mode, long press = record mode)
 206     // value and pointer from sub_FF86FC2C ixus185_100a
 207     *(int*)(0x2c78+0x4) = (*(int*)0xC022F484)&0x20000 ? 0x400000 : 0x200000;
 208 
 209 asm volatile (
 210 "    LDR     R0, =0xFF82043C \n"
 211 "    MOV     R1, #0 \n"
 212 "    LDR     R3, =0xFF820474 \n"
 213 
 214 "loc_FF8203D0:\n"
 215 "    CMP     R0, R3 \n"
 216 "    LDRCC   R2, [R0], #4 \n"
 217 "    STRCC   R2, [R1], #4 \n"
 218 "    BCC     loc_FF8203D0 \n"
 219 "    LDR     R0, =0xFF820474 \n"
 220 "    MOV     R1, #0x1E0 \n"
 221 "    LDR     R3, =0xFF82064C \n"
 222 
 223 "loc_FF8203EC:\n"
 224 "    CMP     R0, R3 \n"
 225 "    LDRCC   R2, [R0], #4 \n"
 226 "    STRCC   R2, [R1], #4 \n"
 227 "    BCC     loc_FF8203EC \n"
 228 "    MOV     R0, #0xD2 \n"
 229 "    MSR     CPSR_cxsf, R0 \n"
 230 "    MOV     SP, #0x1000 \n"
 231 "    MOV     R0, #0xD3 \n"
 232 "    MSR     CPSR_cxsf, R0 \n"
 233 "    MOV     SP, #0x1000 \n"
 234 "    LDR     R0, =0x3B8 \n"
 235 "    LDR     R2, =0xEEEEEEEE \n"
 236 "    MOV     R3, #0x1000 \n"
 237 
 238 "loc_FF820420:\n"
 239 "    CMP     R0, R3 \n"
 240 "    STRCC   R2, [R0], #4 \n"
 241 "    BCC     loc_FF820420 \n"
 242 "    B       sub_FF822A0C_my \n"  // --> Patched. Old value = 0xFF822A0C.
 243 );
 244 }
 245 
 246 /*************************************************************/
 247 //** sub_FF822A0C_my @ 0xFF822A0C - 0xFF822B18, length=68
 248 void __attribute__((naked,noinline)) sub_FF822A0C_my() {
 249 asm volatile (
 250 "    LDR     R0, =0x1A64 \n"
 251 "    STR     LR, [SP, #-4]! \n"
 252 "    SUB     SP, SP, #0x7C \n"
 253 "    MOV     R1, #0x80000 \n"
 254 "    STR     R1, [R0] \n"
 255 "    LDR     R0, =0x40BEE980 \n"
 256 "    LDR     R1, =0x1A68 \n"
 257 "    STR     R0, [R1] \n"
 258 "    LDR     R1, =0x1A6C \n"
 259 "    ADD     R0, R0, #0x2000 \n"
 260 "    STR     R0, [R1] \n"
 261 "    MOV     R1, #0x78 \n"
 262 "    ADD     R0, SP, #4 \n"
 263 "    BL      sub_006BABE0 \n"
 264 "    LDR     R0, =0x82100 \n"
 265 "    LDR     R2, =0x582D80 \n"
 266 "    STR     R0, [SP, #8] \n"
 267 
 268 #if defined(CHDK_NOT_IN_CANON_HEAP) // use original heap offset if CHDK is loaded in high memory
 269 "    LDR     R0, =0x18AA24 \n"
 270 #else
 271 "    LDR     R0, =new_sa\n"   // otherwise use patched value
 272 "    LDR     R0, [R0]\n"      //
 273 #endif
 274 
 275 "    LDR     R1, =0x58BF00 \n"
 276 "    STR     R0, [SP, #0xC] \n"
 277 "    SUB     R0, R2, R0 \n"
 278 "    STR     R0, [SP, #0x10] \n"
 279 "    MOV     R0, #0x22 \n"
 280 "    STR     R0, [SP, #0x1C] \n"
 281 "    MOV     R0, #0x7A \n"
 282 "    STR     R0, [SP, #0x20] \n"
 283 "    LDR     R0, =0x205 \n"
 284 "    STR     R2, [SP, #0x14] \n"
 285 "    STR     R0, [SP, #0x24] \n"
 286 "    MOV     R0, #0x96 \n"
 287 "    STR     R1, [SP, #4] \n"
 288 "    STR     R1, [SP, #0x18] \n"
 289 "    STR     R0, [SP, #0x28] \n"
 290 "    MOV     R0, #0xB4 \n"
 291 "    STR     R0, [SP, #0x2C] \n"
 292 "    MOV     R0, #0x64 \n"
 293 "    STR     R0, [SP, #0x30] \n"
 294 "    MOV     R0, #0 \n"
 295 "    STR     R0, [SP, #0x34] \n"
 296 "    STR     R0, [SP, #0x38] \n"
 297 "    STR     R0, [SP, #0x3C] \n"
 298 "    MOV     R0, #0x10 \n"
 299 "    STR     R0, [SP, #0x60] \n"
 300 "    MOV     R0, #0x1000 \n"
 301 "    STR     R0, [SP, #0x64] \n"
 302 "    MOV     R0, #0x100 \n"
 303 "    STR     R0, [SP, #0x68] \n"
 304 "    MOV     R0, #0x2000 \n"
 305 "    STR     R0, [SP, #0x6C] \n"
 306 "    LDR     R1, =sub_FF824830_my \n"  // --> Patched. Old value = 0xFF824830.
 307 "    MOV     R2, #0 \n"
 308 "    ADD     R0, SP, #4 \n"
 309 "    BL      sub_006B1BC4 \n"
 310 "    ADD     SP, SP, #0x7C \n"
 311 "    LDR     PC, [SP], #4 \n"
 312 );
 313 }
 314 
 315 /*************************************************************/
 316 //** sub_FF824830_my @ 0xFF824830 - 0xFF8248C8, length=39
 317 void __attribute__((naked,noinline)) sub_FF824830_my() {
 318 asm volatile (
 319 "    STMFD   SP!, {R4,LR} \n"
 320 "    LDR     R4, =0xFF8248EC /*'/_term'*/ \n"
 321 "    BL      sub_FF820848 \n"
 322 "    LDR     R1, =0x1A64 \n"
 323 "    LDR     R0, =0x19F8 \n"
 324 "    LDR     R1, [R1] \n"
 325 "    LDR     R0, [R0] \n"
 326 "    ADD     R1, R1, #8 \n"
 327 "    CMP     R0, R1 \n"
 328 "    LDRCC   R0, =0xFF8248FC /*'USER_MEM size checking'*/ \n"
 329 "    BLCC    _err_init_task \n"
 330 "    BL      sub_FF82361C \n"
 331 "    CMP     R0, #0 \n"
 332 "    LDRLT   R0, =0xFF824914 /*'dmSetup'*/ \n"
 333 "    BLLT    _err_init_task \n"
 334 "    BL      sub_FF82263C \n"
 335 "    CMP     R0, #0 \n"
 336 "    LDRLT   R0, =0xFF82491C /*'termDriverInit'*/ \n"
 337 "    BLLT    _err_init_task \n"
 338 "    MOV     R0, R4 \n"
 339 "    BL      sub_FF82271C \n"
 340 "    CMP     R0, #0 \n"
 341 "    LDRLT   R0, =0xFF82492C /*'termDeviceCreate'*/ \n"
 342 "    BLLT    _err_init_task \n"
 343 "    MOV     R0, R4 \n"
 344 "    BL      sub_FF822254 \n"
 345 "    CMP     R0, #0 \n"
 346 "    LDRLT   R0, =0xFF824940 /*'stdioSetup'*/ \n"
 347 "    BLLT    _err_init_task \n"
 348 "    BL      sub_FF825560 \n"
 349 "    CMP     R0, #0 \n"
 350 "    LDRLT   R0, =0xFF82494C /*'stdlibSetup'*/ \n"
 351 "    BLLT    _err_init_task \n"
 352 "    BL      sub_FF821060 \n"
 353 "    CMP     R0, #0 \n"
 354 "    LDRLT   R0, =0xFF824958 /*'extlib_setup'*/ \n"
 355 "    BLLT    _err_init_task \n"
 356 "    LDMFD   SP!, {R4,LR} \n"
 357 "    B       sub_FF827F34_my \n"  // --> Patched. Old value = 0xFF827F34.
 358 );
 359 }
 360 
 361 /*************************************************************/
 362 //** sub_FF827F34_my @ 0xFF827F34 - 0xFF827FB0, length=32
 363 void __attribute__((naked,noinline)) sub_FF827F34_my() {
 364 asm volatile (
 365 "    STMFD   SP!, {R3-R5,LR} \n"
 366 //"  BL      _sub_FF89EBE4 \n"  // --> Nullsub call removed.
 367 "    BL      sub_FF821330 \n"
 368 "    BL      sub_FF837FC4 \n"
 369 "    LDR     R4, =0x60E000 \n"
 370 "    CMP     R0, #0 \n"
 371 "    BEQ     loc_FF827F68 \n"
 372 "    BL      sub_FF838DF0 \n"
 373 "    MOV     R1, R4 \n"
 374 "    MOV     R0, #0 \n"
 375 "    BL      sub_FF837EF0 \n"
 376 "    BL      sub_FF82C244 \n"
 377 "    BL      sub_FF83804C \n"
 378 
 379 "loc_FF827F68:\n"
 380 //"  BL      _sub_FF82DA30 \n"
 381 //"  BL      _sub_FF82CB20 \n"  // startup check,disabled
 382 //"  CMP     R0, #0 \n"
 383 //"  BNE     loc_FF827F80 \n"
 384 //"  BL      _sub_FF82C298 \n"
 385 
 386 "loc_FF827F7C:\n"
 387 //"  B       loc_FF827F7C \n"
 388 
 389 "loc_FF827F80:\n"
 390 "    BL      sub_FF838DF0 \n"
 391 "    MOV     R1, R4 \n"
 392 "    MOV     R0, #0 \n"
 393 "    BL      sub_FF837EF0 \n"
 394 "    MOV     R3, #0 \n"
 395 "    STR     R3, [SP] \n"
 396 "    LDR     R3, =task_Startup_my \n"  // --> Patched. Old value = 0xFF827ECC.
 397 "    MOV     R2, #0 \n"
 398 "    MOV     R1, #0x19 \n"
 399 "    LDR     R0, =0xFF827FBC /*'Startup'*/ \n"
 400 "    BL      _CreateTask \n"
 401 "    MOV     R0, #0 \n"
 402 "    LDMFD   SP!, {R3-R5,PC} \n"
 403 );
 404 }
 405 
 406 /*************************************************************/
 407 //** task_Startup_my @ 0xFF827ECC - 0xFF827F30, length=26
 408 void __attribute__((naked,noinline)) task_Startup_my() {
 409 asm volatile (
 410 "    STMFD   SP!, {R4,LR} \n"
 411 "    BL      sub_FF822DC0 \n"
 412 "    BL      sub_FF82CFA4 \n"
 413 "    BL      sub_FF82C244 \n"
 414 //"  BL      _sub_FF8702F4 \n"  // --> Nullsub call removed.
 415 "    BL      sub_FF837CAC \n"
 416 //"  BL      _sub_FF837B6C \n"  // load DISKBOOT.BIN
 417 "    BL      sub_FF837E00 \n"
 418 "    BL      sub_FF838130 \n"
 419 //"  BL      _sub_FF837DF4 \n"  // --> Nullsub call removed.
 420 "    BL      sub_FF837CE0 \n"
 421 "    BL      sub_FF833CF8 \n"
 422 "    BL      sub_FF838138 \n"
 423 "    BL      CreateTask_spytask\n" // added
 424 "    BL      taskcreatePhySw_my \n"  // --> Patched. Old value = 0xFF82C9C8.
 425 "    BL      init_required_fw_features\n" // added
 426 "    BL      sub_FF831C98 \n"
 427 "    BL      sub_FF8B80C4 \n"
 428 "    BL      sub_FF829E58 \n"
 429 "    BL      sub_FF82BDC8 \n"
 430 "    BL      sub_FF8378A0 \n"
 431 "    BL      sub_FF82C1F8 \n"
 432 "    BL      sub_FF82BD5C \n"
 433 //"  BL      _sub_FF837DF8 \n"  // --> Nullsub call removed.
 434 "    BL      sub_FF82AC70 \n"
 435 "    BL      sub_FF82BD18 \n"
 436 "    LDMFD   SP!, {R4,LR} \n"
 437 "    B       sub_FF822F10 \n"
 438 );
 439 }
 440 
 441 /*************************************************************/
 442 //** taskcreatePhySw_my @ 0xFF82C9C8 - 0xFF82CA10, length=19
 443 void __attribute__((naked,noinline)) taskcreatePhySw_my() {
 444 asm volatile (
 445 "    STMFD   SP!, {R2-R4,LR} \n"
 446 "    BL      sub_FF836B0C \n"
 447 "    BL      sub_FF82D968 /*_IsFactoryMode_FW*/ \n"
 448 "    CMP     R0, #0 \n"
 449 "    BLEQ    sub_FF836A74 /*_OpLog.Start_FW*/ \n"
 450 "    LDR     R4, =0x1BE4 \n"
 451 "    LDR     R0, [R4, #4] \n"
 452 "    CMP     R0, #0 \n"
 453 "    BNE     loc_FF82CA10 \n"
 454 "    MOV     R3, #1 \n"
 455 "    MOV     R2, #0 \n"
 456 "    STRD    R2, [SP] \n"
 457 "    LDR     R3, =mykbd_task \n"  // --> Patched. Old value = 0xFF82C994.
 458 "    MOV     R2, #0x2000 \n"  // --> Patched. Old value = 0x800. stack size for new task_PhySw so we don't have to do stack switch
 459 "    MOV     R1, #0x13 \n"
 460 "    LDR     R0, =0xFF82CC74 /*'PhySw'*/ \n"
 461 "    BL      sub_FF828440 /*_CreateTaskStrictly*/ \n"
 462 "    STR     R0, [R4, #4] \n"
 463 
 464 "loc_FF82CA10:\n"
 465 "    LDMFD   SP!, {R2-R4,PC} \n"
 466 );
 467 }
 468 
 469 /*************************************************************/
 470 //** init_file_modules_task @ 0xFF85D4EC - 0xFF85D528, length=16
 471 void __attribute__((naked,noinline)) init_file_modules_task() {
 472 asm volatile (
 473 "    STMFD   SP!, {R4-R6,LR} \n"
 474 "    MOV     R0, #6 \n"
 475 //"  BL      _sub_FF829FC8 \n"  // --> Nullsub call removed.
 476 "    BL      sub_FF8A592C \n"
 477 "    LDR     R5, =0x5006 \n"
 478 "    MOVS    R4, R0 \n"
 479 "    MOVNE   R1, #0 \n"
 480 "    MOVNE   R0, R5 \n"
 481 "    BLNE    _PostLogicalEventToUI \n"
 482 "    BL      sub_FF8A595C \n"
 483 "    BL      core_spytask_can_start\n"  // CHDK: Set "it's-safe-to-start" flag for spytask
 484 "    CMP     R4, #0 \n"
 485 "    LDMNEFD SP!, {R4-R6,PC} \n"
 486 "    MOV     R0, R5 \n"
 487 "    LDMFD   SP!, {R4-R6,LR} \n"
 488 "    MOV     R1, #1 \n"
 489 "    B       _PostLogicalEventToUI \n"
 490 );
 491 }
 492 
 493 /*************************************************************/
 494 //** kbd_p1_f_cont_my @ 0xFF82CECC - 0xFF82CF0C, length=17
 495 void __attribute__((naked,noinline)) kbd_p1_f_cont_my() {
 496 asm volatile (
 497 "    LDR     R2, =0x1015C \n"
 498 "    MOV     R0, #2 \n"
 499 "    ADD     R3, R2, #0x24 \n"
 500 "    MOV     R4, SP \n"
 501 
 502 "loc_FF82CEDC:\n"
 503 "    ADD     R1, R3, R0, LSL#2 \n"
 504 "    LDR     R12, [R2, R0, LSL#2] \n"
 505 "    LDR     R6, [R1, #0xC] \n"
 506 "    LDR     R1, [R1, #0x18] \n"
 507 "    AND     R12, R12, R6 \n"
 508 "    EOR     R1, R1, R12 \n"
 509 "    STR     R1, [R4, R0, LSL#2] \n"
 510 "    SUBS    R0, R0, #1 \n"
 511 "    BPL     loc_FF82CEDC \n"
 512 "    bl      xtra_kbd_cb \n"            // + returns part of physw_status when overriding, -1 otherwise
 513 "    mov     r3, r0 \n"                 // + provide new argument for the next function
 514 "    LDR     R2, =0x10174 \n"
 515 "    MOV     R0, SP \n"
 516 "    SUB     R1, R2, #0xC \n"
 517 "    BL      sub_FF82C724_my \n"  // --> Patched. Old value = 0xFF82C724.
 518 "    LDR     PC, =0xFF82CF10 \n"  // Continue in firmware
 519 );
 520 }
 521 
 522 /*************************************************************/
 523 //** sub_FF82C724_my @ 0xFF82C724 - 0xFF82C72C, length=3
 524 void __attribute__((naked,noinline)) sub_FF82C724_my() {
 525 asm volatile (
 526 "    STMFD   SP!, {R0-R12,LR} \n"
 527 "    MOV     R5, R0 \n"
 528 //"  MVN     R0, #0 \n"  // - should be (physw_status[0] & 0xffff) when overriding, -1 otherwise. 
 529 "    mov     r0, r3 \n"  // + (new argument to allow passing our variable)
 530 "    LDR     PC, =0xFF82C730 \n"  // Continue in firmware
 531 );
 532 }
 533 /*
 534     *** TEMPORARY workaround ***
 535     Init stuff to avoid asserts on cameras running DryOS r54+
 536     Execute this only once
 537  */
 538 void init_required_fw_features(void) {
 539     extern void _init_focus_eventflag();
 540     extern void _init_nd_eventflag();
 541     extern void _init_nd_semaphore();
 542     //extern void _init_zoom_semaphore(); // for MoveZoomLensWithPoint
 543 
 544     _init_focus_eventflag();
 545     _init_nd_eventflag();
 546     _init_nd_semaphore();
 547 
 548 }
 549 

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