| 1 | /* armos.c -- ARMulator OS interface: ARM6 Instruction Emulator. |
| 2 | Copyright (C) 1994 Advanced RISC Machines Ltd. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | /* This file contains a model of Demon, ARM Ltd's Debug Monitor, |
| 19 | including all the SWI's required to support the C library. The code in |
| 20 | it is not really for the faint-hearted (especially the abort handling |
| 21 | code), but it is a complete example. Defining NOOS will disable all the |
| 22 | fun, and definign VAILDATE will define SWI 1 to enter SVC mode, and SWI |
| 23 | 0x11 to halt the emulator. */ |
| 24 | |
| 25 | #include "config.h" |
| 26 | #include "ansidecl.h" |
| 27 | |
| 28 | #include <time.h> |
| 29 | #include <errno.h> |
| 30 | #include <string.h> |
| 31 | #include <fcntl.h> |
| 32 | |
| 33 | #ifndef O_RDONLY |
| 34 | #define O_RDONLY 0 |
| 35 | #endif |
| 36 | #ifndef O_WRONLY |
| 37 | #define O_WRONLY 1 |
| 38 | #endif |
| 39 | #ifndef O_RDWR |
| 40 | #define O_RDWR 2 |
| 41 | #endif |
| 42 | #ifndef O_BINARY |
| 43 | #define O_BINARY 0 |
| 44 | #endif |
| 45 | |
| 46 | #ifdef __STDC__ |
| 47 | #define unlink(s) remove(s) |
| 48 | #endif |
| 49 | |
| 50 | #ifdef HAVE_UNISTD_H |
| 51 | #include <unistd.h> /* For SEEK_SET etc */ |
| 52 | #endif |
| 53 | |
| 54 | #ifdef __riscos |
| 55 | extern int _fisatty (FILE *); |
| 56 | #define isatty_(f) _fisatty(f) |
| 57 | #else |
| 58 | #ifdef __ZTC__ |
| 59 | #include <io.h> |
| 60 | #define isatty_(f) isatty((f)->_file) |
| 61 | #else |
| 62 | #ifdef macintosh |
| 63 | #include <ioctl.h> |
| 64 | #define isatty_(f) (~ioctl ((f)->_file, FIOINTERACTIVE, NULL)) |
| 65 | #else |
| 66 | #define isatty_(f) isatty (fileno (f)) |
| 67 | #endif |
| 68 | #endif |
| 69 | #endif |
| 70 | |
| 71 | #include "armdefs.h" |
| 72 | #include "armos.h" |
| 73 | #include "armemu.h" |
| 74 | |
| 75 | #ifndef NOOS |
| 76 | #ifndef VALIDATE |
| 77 | /* #ifndef ASIM */ |
| 78 | #include "armfpe.h" |
| 79 | /* #endif */ |
| 80 | #endif |
| 81 | #endif |
| 82 | |
| 83 | /* For RDIError_BreakpointReached. */ |
| 84 | #include "dbg_rdi.h" |
| 85 | |
| 86 | extern unsigned ARMul_OSInit (ARMul_State * state); |
| 87 | extern void ARMul_OSExit (ARMul_State * state); |
| 88 | extern unsigned ARMul_OSHandleSWI (ARMul_State * state, ARMword number); |
| 89 | extern unsigned ARMul_OSException (ARMul_State * state, ARMword vector, |
| 90 | ARMword pc); |
| 91 | extern ARMword ARMul_OSLastErrorP (ARMul_State * state); |
| 92 | extern ARMword ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr); |
| 93 | |
| 94 | #define BUFFERSIZE 4096 |
| 95 | #ifndef FOPEN_MAX |
| 96 | #define FOPEN_MAX 64 |
| 97 | #endif |
| 98 | #define UNIQUETEMPS 256 |
| 99 | |
| 100 | /* OS private Information. */ |
| 101 | |
| 102 | struct OSblock |
| 103 | { |
| 104 | ARMword Time0; |
| 105 | ARMword ErrorP; |
| 106 | ARMword ErrorNo; |
| 107 | FILE *FileTable[FOPEN_MAX]; |
| 108 | char FileFlags[FOPEN_MAX]; |
| 109 | char *tempnames[UNIQUETEMPS]; |
| 110 | }; |
| 111 | |
| 112 | #define NOOP 0 |
| 113 | #define BINARY 1 |
| 114 | #define READOP 2 |
| 115 | #define WRITEOP 4 |
| 116 | |
| 117 | #ifdef macintosh |
| 118 | #define FIXCRLF(t,c) ((t & BINARY) ? \ |
| 119 | c : \ |
| 120 | ((c == '\n' || c == '\r' ) ? (c ^ 7) : c) \ |
| 121 | ) |
| 122 | #else |
| 123 | #define FIXCRLF(t,c) c |
| 124 | #endif |
| 125 | |
| 126 | static ARMword softvectorcode[] = |
| 127 | { |
| 128 | /* Basic: swi tidyexception + event; mov pc, lr; |
| 129 | ldmia r11,{r11,pc}; swi generateexception + event. */ |
| 130 | 0xef000090, 0xe1a0e00f, 0xe89b8800, 0xef000080, /* Reset */ |
| 131 | 0xef000091, 0xe1a0e00f, 0xe89b8800, 0xef000081, /* Undef */ |
| 132 | 0xef000092, 0xe1a0e00f, 0xe89b8800, 0xef000082, /* SWI */ |
| 133 | 0xef000093, 0xe1a0e00f, 0xe89b8800, 0xef000083, /* Prefetch abort */ |
| 134 | 0xef000094, 0xe1a0e00f, 0xe89b8800, 0xef000084, /* Data abort */ |
| 135 | 0xef000095, 0xe1a0e00f, 0xe89b8800, 0xef000085, /* Address exception */ |
| 136 | 0xef000096, 0xe1a0e00f, 0xe89b8800, 0xef000086, /* IRQ */ |
| 137 | 0xef000097, 0xe1a0e00f, 0xe89b8800, 0xef000087, /* FIQ */ |
| 138 | 0xef000098, 0xe1a0e00f, 0xe89b8800, 0xef000088, /* Error */ |
| 139 | 0xe1a0f00e /* Default handler */ |
| 140 | }; |
| 141 | |
| 142 | /* Time for the Operating System to initialise itself. */ |
| 143 | |
| 144 | unsigned |
| 145 | ARMul_OSInit (ARMul_State * state) |
| 146 | { |
| 147 | #ifndef NOOS |
| 148 | #ifndef VALIDATE |
| 149 | ARMword instr, i, j; |
| 150 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 151 | |
| 152 | if (state->OSptr == NULL) |
| 153 | { |
| 154 | state->OSptr = (unsigned char *) malloc (sizeof (struct OSblock)); |
| 155 | if (state->OSptr == NULL) |
| 156 | { |
| 157 | perror ("OS Memory"); |
| 158 | exit (15); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | OSptr = (struct OSblock *) state->OSptr; |
| 163 | OSptr->ErrorP = 0; |
| 164 | state->Reg[13] = ADDRSUPERSTACK; /* set up a stack for the current mode */ |
| 165 | ARMul_SetReg (state, SVC32MODE, 13, ADDRSUPERSTACK); /* and for supervisor mode */ |
| 166 | ARMul_SetReg (state, ABORT32MODE, 13, ADDRSUPERSTACK); /* and for abort 32 mode */ |
| 167 | ARMul_SetReg (state, UNDEF32MODE, 13, ADDRSUPERSTACK); /* and for undef 32 mode */ |
| 168 | ARMul_SetReg (state, SYSTEMMODE, 13, ADDRSUPERSTACK); /* and for system mode */ |
| 169 | instr = 0xe59ff000 | (ADDRSOFTVECTORS - 8); /* load pc from soft vector */ |
| 170 | |
| 171 | for (i = ARMul_ResetV; i <= ARMFIQV; i += 4) |
| 172 | ARMul_WriteWord (state, i, instr); /* write hardware vectors */ |
| 173 | |
| 174 | SWI_vector_installed = 0; |
| 175 | |
| 176 | for (i = ARMul_ResetV; i <= ARMFIQV + 4; i += 4) |
| 177 | { |
| 178 | ARMul_WriteWord (state, ADDRSOFTVECTORS + i, SOFTVECTORCODE + i * 4); |
| 179 | ARMul_WriteWord (state, ADDRSOFHANDLERS + 2 * i + 4L, |
| 180 | SOFTVECTORCODE + sizeof (softvectorcode) - 4L); |
| 181 | } |
| 182 | |
| 183 | for (i = 0; i < sizeof (softvectorcode); i += 4) |
| 184 | ARMul_WriteWord (state, SOFTVECTORCODE + i, softvectorcode[i / 4]); |
| 185 | |
| 186 | for (i = 0; i < FOPEN_MAX; i++) |
| 187 | OSptr->FileTable[i] = NULL; |
| 188 | |
| 189 | for (i = 0; i < UNIQUETEMPS; i++) |
| 190 | OSptr->tempnames[i] = NULL; |
| 191 | |
| 192 | ARMul_ConsolePrint (state, ", Demon 1.01"); |
| 193 | |
| 194 | /* #ifndef ASIM */ |
| 195 | |
| 196 | /* install fpe */ |
| 197 | for (i = 0; i < fpesize; i += 4) /* copy the code */ |
| 198 | ARMul_WriteWord (state, FPESTART + i, fpecode[i >> 2]); |
| 199 | |
| 200 | for (i = FPESTART + fpesize;; i -= 4) |
| 201 | { /* reverse the error strings */ |
| 202 | if ((j = ARMul_ReadWord (state, i)) == 0xffffffff) |
| 203 | break; |
| 204 | if (state->bigendSig && j < 0x80000000) |
| 205 | { /* it's part of the string so swap it */ |
| 206 | j = ((j >> 0x18) & 0x000000ff) | |
| 207 | ((j >> 0x08) & 0x0000ff00) | |
| 208 | ((j << 0x08) & 0x00ff0000) | ((j << 0x18) & 0xff000000); |
| 209 | ARMul_WriteWord (state, i, j); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | ARMul_WriteWord (state, FPEOLDVECT, ARMul_ReadWord (state, 4)); /* copy old illegal instr vector */ |
| 214 | ARMul_WriteWord (state, 4, FPENEWVECT (ARMul_ReadWord (state, i - 4))); /* install new vector */ |
| 215 | ARMul_ConsolePrint (state, ", FPE"); |
| 216 | |
| 217 | /* #endif ASIM */ |
| 218 | #endif /* VALIDATE */ |
| 219 | #endif /* NOOS */ |
| 220 | |
| 221 | return TRUE; |
| 222 | } |
| 223 | |
| 224 | void |
| 225 | ARMul_OSExit (ARMul_State * state) |
| 226 | { |
| 227 | free ((char *) state->OSptr); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | /* Return the last Operating System Error. */ |
| 232 | |
| 233 | ARMword ARMul_OSLastErrorP (ARMul_State * state) |
| 234 | { |
| 235 | return ((struct OSblock *) state->OSptr)->ErrorP; |
| 236 | } |
| 237 | |
| 238 | static int translate_open_mode[] = |
| 239 | { |
| 240 | O_RDONLY, /* "r" */ |
| 241 | O_RDONLY + O_BINARY, /* "rb" */ |
| 242 | O_RDWR, /* "r+" */ |
| 243 | O_RDWR + O_BINARY, /* "r+b" */ |
| 244 | O_WRONLY + O_CREAT + O_TRUNC, /* "w" */ |
| 245 | O_WRONLY + O_BINARY + O_CREAT + O_TRUNC, /* "wb" */ |
| 246 | O_RDWR + O_CREAT + O_TRUNC, /* "w+" */ |
| 247 | O_RDWR + O_BINARY + O_CREAT + O_TRUNC, /* "w+b" */ |
| 248 | O_WRONLY + O_APPEND + O_CREAT, /* "a" */ |
| 249 | O_WRONLY + O_BINARY + O_APPEND + O_CREAT, /* "ab" */ |
| 250 | O_RDWR + O_APPEND + O_CREAT, /* "a+" */ |
| 251 | O_RDWR + O_BINARY + O_APPEND + O_CREAT /* "a+b" */ |
| 252 | }; |
| 253 | |
| 254 | static void |
| 255 | SWIWrite0 (ARMul_State * state, ARMword addr) |
| 256 | { |
| 257 | ARMword temp; |
| 258 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 259 | |
| 260 | while ((temp = ARMul_ReadByte (state, addr++)) != 0) |
| 261 | (void) fputc ((char) temp, stdout); |
| 262 | |
| 263 | OSptr->ErrorNo = errno; |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | WriteCommandLineTo (ARMul_State * state, ARMword addr) |
| 268 | { |
| 269 | ARMword temp; |
| 270 | char *cptr = state->CommandLine; |
| 271 | |
| 272 | if (cptr == NULL) |
| 273 | cptr = "\0"; |
| 274 | do |
| 275 | { |
| 276 | temp = (ARMword) * cptr++; |
| 277 | ARMul_WriteByte (state, addr++, temp); |
| 278 | } |
| 279 | while (temp != 0); |
| 280 | } |
| 281 | |
| 282 | static void |
| 283 | SWIopen (ARMul_State * state, ARMword name, ARMword SWIflags) |
| 284 | { |
| 285 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 286 | char dummy[2000]; |
| 287 | int flags; |
| 288 | int i; |
| 289 | |
| 290 | for (i = 0; (dummy[i] = ARMul_ReadByte (state, name + i)); i++) |
| 291 | ; |
| 292 | |
| 293 | /* Now we need to decode the Demon open mode. */ |
| 294 | flags = translate_open_mode[SWIflags]; |
| 295 | |
| 296 | /* Filename ":tt" is special: it denotes stdin/out. */ |
| 297 | if (strcmp (dummy, ":tt") == 0) |
| 298 | { |
| 299 | if (flags == O_RDONLY) /* opening tty "r" */ |
| 300 | state->Reg[0] = 0; /* stdin */ |
| 301 | else |
| 302 | state->Reg[0] = 1; /* stdout */ |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | state->Reg[0] = (int) open (dummy, flags, 0666); |
| 307 | OSptr->ErrorNo = errno; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | static void |
| 312 | SWIread (ARMul_State * state, ARMword f, ARMword ptr, ARMword len) |
| 313 | { |
| 314 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 315 | int res; |
| 316 | int i; |
| 317 | char *local = malloc (len); |
| 318 | |
| 319 | if (local == NULL) |
| 320 | { |
| 321 | fprintf (stderr, "sim: Unable to read 0x%ulx bytes - out of memory\n", |
| 322 | len); |
| 323 | return; |
| 324 | } |
| 325 | |
| 326 | res = read (f, local, len); |
| 327 | if (res > 0) |
| 328 | for (i = 0; i < res; i++) |
| 329 | ARMul_WriteByte (state, ptr + i, local[i]); |
| 330 | |
| 331 | free (local); |
| 332 | state->Reg[0] = res == -1 ? -1 : len - res; |
| 333 | OSptr->ErrorNo = errno; |
| 334 | } |
| 335 | |
| 336 | static void |
| 337 | SWIwrite (ARMul_State * state, ARMword f, ARMword ptr, ARMword len) |
| 338 | { |
| 339 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 340 | int res; |
| 341 | ARMword i; |
| 342 | char *local = malloc (len); |
| 343 | |
| 344 | if (local == NULL) |
| 345 | { |
| 346 | fprintf (stderr, "sim: Unable to write 0x%lx bytes - out of memory\n", |
| 347 | (long) len); |
| 348 | return; |
| 349 | } |
| 350 | |
| 351 | for (i = 0; i < len; i++) |
| 352 | local[i] = ARMul_ReadByte (state, ptr + i); |
| 353 | |
| 354 | res = write (f, local, len); |
| 355 | state->Reg[0] = res == -1 ? -1 : len - res; |
| 356 | free (local); |
| 357 | |
| 358 | OSptr->ErrorNo = errno; |
| 359 | } |
| 360 | |
| 361 | static void |
| 362 | SWIflen (ARMul_State * state, ARMword fh) |
| 363 | { |
| 364 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 365 | ARMword addr; |
| 366 | |
| 367 | if (fh == 0 || fh > FOPEN_MAX) |
| 368 | { |
| 369 | OSptr->ErrorNo = EBADF; |
| 370 | state->Reg[0] = -1L; |
| 371 | return; |
| 372 | } |
| 373 | |
| 374 | addr = lseek (fh, 0, SEEK_CUR); |
| 375 | |
| 376 | state->Reg[0] = lseek (fh, 0L, SEEK_END); |
| 377 | (void) lseek (fh, addr, SEEK_SET); |
| 378 | |
| 379 | OSptr->ErrorNo = errno; |
| 380 | } |
| 381 | |
| 382 | /* The emulator calls this routine when a SWI instruction is encuntered. |
| 383 | The parameter passed is the SWI number (lower 24 bits of the instruction). */ |
| 384 | |
| 385 | unsigned |
| 386 | ARMul_OSHandleSWI (ARMul_State * state, ARMword number) |
| 387 | { |
| 388 | ARMword addr, temp; |
| 389 | struct OSblock *OSptr = (struct OSblock *) state->OSptr; |
| 390 | ARMword saved_number = 0; |
| 391 | |
| 392 | /* Intel do not want DEMON SWI support. */ |
| 393 | if (state->is_XScale) |
| 394 | switch (number) |
| 395 | { |
| 396 | case SWI_Read: |
| 397 | case SWI_Write: |
| 398 | case SWI_Open: |
| 399 | case SWI_Clock: |
| 400 | case SWI_Time: |
| 401 | case SWI_Close: |
| 402 | case SWI_Flen: |
| 403 | case SWI_Exit: |
| 404 | case SWI_Seek: |
| 405 | case SWI_WriteC: |
| 406 | case SWI_Write0: |
| 407 | case SWI_GetErrno: |
| 408 | case SWI_GetEnv: |
| 409 | saved_number = number; |
| 410 | number = -1; |
| 411 | default: |
| 412 | break; |
| 413 | } |
| 414 | |
| 415 | switch (number) |
| 416 | { |
| 417 | case SWI_Read: |
| 418 | SWIread (state, state->Reg[0], state->Reg[1], state->Reg[2]); |
| 419 | return TRUE; |
| 420 | |
| 421 | case SWI_Write: |
| 422 | SWIwrite (state, state->Reg[0], state->Reg[1], state->Reg[2]); |
| 423 | return TRUE; |
| 424 | |
| 425 | case SWI_Open: |
| 426 | SWIopen (state, state->Reg[0], state->Reg[1]); |
| 427 | return TRUE; |
| 428 | |
| 429 | case SWI_Clock: |
| 430 | /* Return number of centi-seconds. */ |
| 431 | state->Reg[0] = |
| 432 | #ifdef CLOCKS_PER_SEC |
| 433 | (CLOCKS_PER_SEC >= 100) |
| 434 | ? (ARMword) (clock () / (CLOCKS_PER_SEC / 100)) |
| 435 | : (ARMword) ((clock () * 100) / CLOCKS_PER_SEC); |
| 436 | #else |
| 437 | /* Presume unix... clock() returns microseconds. */ |
| 438 | (ARMword) (clock () / 10000); |
| 439 | #endif |
| 440 | OSptr->ErrorNo = errno; |
| 441 | return TRUE; |
| 442 | |
| 443 | case SWI_Time: |
| 444 | state->Reg[0] = (ARMword) time (NULL); |
| 445 | OSptr->ErrorNo = errno; |
| 446 | return TRUE; |
| 447 | |
| 448 | case SWI_Close: |
| 449 | state->Reg[0] = close (state->Reg[0]); |
| 450 | OSptr->ErrorNo = errno; |
| 451 | return TRUE; |
| 452 | |
| 453 | case SWI_Flen: |
| 454 | SWIflen (state, state->Reg[0]); |
| 455 | return TRUE; |
| 456 | |
| 457 | case SWI_Exit: |
| 458 | state->Emulate = FALSE; |
| 459 | return TRUE; |
| 460 | |
| 461 | case SWI_Seek: |
| 462 | { |
| 463 | /* We must return non-zero for failure. */ |
| 464 | state->Reg[0] = -1 >= lseek (state->Reg[0], state->Reg[1], SEEK_SET); |
| 465 | OSptr->ErrorNo = errno; |
| 466 | return TRUE; |
| 467 | } |
| 468 | |
| 469 | case SWI_WriteC: |
| 470 | (void) fputc ((int) state->Reg[0], stdout); |
| 471 | OSptr->ErrorNo = errno; |
| 472 | return TRUE; |
| 473 | |
| 474 | case SWI_Write0: |
| 475 | SWIWrite0 (state, state->Reg[0]); |
| 476 | return TRUE; |
| 477 | |
| 478 | case SWI_GetErrno: |
| 479 | state->Reg[0] = OSptr->ErrorNo; |
| 480 | return TRUE; |
| 481 | |
| 482 | case SWI_GetEnv: |
| 483 | state->Reg[0] = ADDRCMDLINE; |
| 484 | if (state->MemSize) |
| 485 | state->Reg[1] = state->MemSize; |
| 486 | else |
| 487 | state->Reg[1] = ADDRUSERSTACK; |
| 488 | |
| 489 | WriteCommandLineTo (state, state->Reg[0]); |
| 490 | return TRUE; |
| 491 | |
| 492 | case SWI_Breakpoint: |
| 493 | state->EndCondition = RDIError_BreakpointReached; |
| 494 | state->Emulate = FALSE; |
| 495 | return TRUE; |
| 496 | |
| 497 | /* Handle Angel SWIs as well as Demon ones. */ |
| 498 | case AngelSWI_ARM: |
| 499 | case AngelSWI_Thumb: |
| 500 | /* R1 is almost always a parameter block. */ |
| 501 | addr = state->Reg[1]; |
| 502 | /* R0 is a reason code. */ |
| 503 | switch (state->Reg[0]) |
| 504 | { |
| 505 | /* Unimplemented reason codes. */ |
| 506 | case AngelSWI_Reason_ReadC: |
| 507 | case AngelSWI_Reason_IsTTY: |
| 508 | case AngelSWI_Reason_TmpNam: |
| 509 | case AngelSWI_Reason_Remove: |
| 510 | case AngelSWI_Reason_Rename: |
| 511 | case AngelSWI_Reason_System: |
| 512 | case AngelSWI_Reason_EnterSVC: |
| 513 | default: |
| 514 | state->Emulate = FALSE; |
| 515 | return FALSE; |
| 516 | |
| 517 | case AngelSWI_Reason_Clock: |
| 518 | /* Return number of centi-seconds. */ |
| 519 | state->Reg[0] = |
| 520 | #ifdef CLOCKS_PER_SEC |
| 521 | (CLOCKS_PER_SEC >= 100) |
| 522 | ? (ARMword) (clock () / (CLOCKS_PER_SEC / 100)) |
| 523 | : (ARMword) ((clock () * 100) / CLOCKS_PER_SEC); |
| 524 | #else |
| 525 | /* Presume unix... clock() returns microseconds. */ |
| 526 | (ARMword) (clock () / 10000); |
| 527 | #endif |
| 528 | OSptr->ErrorNo = errno; |
| 529 | return TRUE; |
| 530 | |
| 531 | case AngelSWI_Reason_Time: |
| 532 | state->Reg[0] = (ARMword) time (NULL); |
| 533 | OSptr->ErrorNo = errno; |
| 534 | return TRUE; |
| 535 | |
| 536 | case AngelSWI_Reason_WriteC: |
| 537 | (void) fputc ((int) ARMul_ReadByte (state, addr), stdout); |
| 538 | OSptr->ErrorNo = errno; |
| 539 | return TRUE; |
| 540 | |
| 541 | case AngelSWI_Reason_Write0: |
| 542 | SWIWrite0 (state, addr); |
| 543 | return TRUE; |
| 544 | |
| 545 | case AngelSWI_Reason_Close: |
| 546 | state->Reg[0] = close (ARMul_ReadWord (state, addr)); |
| 547 | OSptr->ErrorNo = errno; |
| 548 | return TRUE; |
| 549 | |
| 550 | case AngelSWI_Reason_Seek: |
| 551 | state->Reg[0] = -1 >= lseek (ARMul_ReadWord (state, addr), |
| 552 | ARMul_ReadWord (state, addr + 4), |
| 553 | SEEK_SET); |
| 554 | OSptr->ErrorNo = errno; |
| 555 | return TRUE; |
| 556 | |
| 557 | case AngelSWI_Reason_FLen: |
| 558 | SWIflen (state, ARMul_ReadWord (state, addr)); |
| 559 | return TRUE; |
| 560 | |
| 561 | case AngelSWI_Reason_GetCmdLine: |
| 562 | WriteCommandLineTo (state, ARMul_ReadWord (state, addr)); |
| 563 | return TRUE; |
| 564 | |
| 565 | case AngelSWI_Reason_HeapInfo: |
| 566 | /* R1 is a pointer to a pointer. */ |
| 567 | addr = ARMul_ReadWord (state, addr); |
| 568 | |
| 569 | /* Pick up the right memory limit. */ |
| 570 | if (state->MemSize) |
| 571 | temp = state->MemSize; |
| 572 | else |
| 573 | temp = ADDRUSERSTACK; |
| 574 | |
| 575 | ARMul_WriteWord (state, addr, 0); /* Heap base */ |
| 576 | ARMul_WriteWord (state, addr + 4, temp); /* Heap limit */ |
| 577 | ARMul_WriteWord (state, addr + 8, temp); /* Stack base */ |
| 578 | ARMul_WriteWord (state, addr + 12, temp); /* Stack limit */ |
| 579 | return TRUE; |
| 580 | |
| 581 | case AngelSWI_Reason_ReportException: |
| 582 | if (state->Reg[1] == ADP_Stopped_ApplicationExit) |
| 583 | state->Reg[0] = 0; |
| 584 | else |
| 585 | state->Reg[0] = -1; |
| 586 | state->Emulate = FALSE; |
| 587 | return TRUE; |
| 588 | |
| 589 | case ADP_Stopped_ApplicationExit: |
| 590 | state->Reg[0] = 0; |
| 591 | state->Emulate = FALSE; |
| 592 | return TRUE; |
| 593 | |
| 594 | case ADP_Stopped_RunTimeError: |
| 595 | state->Reg[0] = -1; |
| 596 | state->Emulate = FALSE; |
| 597 | return TRUE; |
| 598 | |
| 599 | case AngelSWI_Reason_Errno: |
| 600 | state->Reg[0] = OSptr->ErrorNo; |
| 601 | return TRUE; |
| 602 | |
| 603 | case AngelSWI_Reason_Open: |
| 604 | SWIopen (state, |
| 605 | ARMul_ReadWord (state, addr), |
| 606 | ARMul_ReadWord (state, addr + 4)); |
| 607 | return TRUE; |
| 608 | |
| 609 | case AngelSWI_Reason_Read: |
| 610 | SWIread (state, |
| 611 | ARMul_ReadWord (state, addr), |
| 612 | ARMul_ReadWord (state, addr + 4), |
| 613 | ARMul_ReadWord (state, addr + 8)); |
| 614 | return TRUE; |
| 615 | |
| 616 | case AngelSWI_Reason_Write: |
| 617 | SWIwrite (state, |
| 618 | ARMul_ReadWord (state, addr), |
| 619 | ARMul_ReadWord (state, addr + 4), |
| 620 | ARMul_ReadWord (state, addr + 8)); |
| 621 | return TRUE; |
| 622 | } |
| 623 | |
| 624 | case 0x90: |
| 625 | case 0x91: |
| 626 | case 0x92: |
| 627 | /* These are used by the FPE code. */ |
| 628 | return TRUE; |
| 629 | |
| 630 | default: |
| 631 | { |
| 632 | /* If there is a SWI vector installed use it. */ |
| 633 | if (state->is_XScale && saved_number != -1) |
| 634 | number = saved_number; |
| 635 | |
| 636 | if (SWI_vector_installed && number != SWI_Breakpoint) |
| 637 | { |
| 638 | ARMword cpsr; |
| 639 | ARMword i_size; |
| 640 | |
| 641 | cpsr = ARMul_GetCPSR (state); |
| 642 | i_size = INSN_SIZE; |
| 643 | |
| 644 | ARMul_SetSPSR (state, SVC32MODE, cpsr); |
| 645 | |
| 646 | cpsr &= ~0xbf; |
| 647 | cpsr |= SVC32MODE | 0x80; |
| 648 | ARMul_SetCPSR (state, cpsr); |
| 649 | |
| 650 | state->RegBank[SVCBANK][14] = state->Reg[14] = state->Reg[15] - i_size; |
| 651 | state->NextInstr = RESUME; |
| 652 | state->Reg[15] = state->pc = ARMSWIV; |
| 653 | FLUSHPIPE; |
| 654 | } |
| 655 | else |
| 656 | fprintf (stderr, "unknown SWI encountered - %x - ignoring\n", number); |
| 657 | return TRUE; |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | #ifndef NOOS |
| 663 | #ifndef ASIM |
| 664 | |
| 665 | /* The emulator calls this routine when an Exception occurs. The second |
| 666 | parameter is the address of the relevant exception vector. Returning |
| 667 | FALSE from this routine causes the trap to be taken, TRUE causes it to |
| 668 | be ignored (so set state->Emulate to FALSE!). */ |
| 669 | |
| 670 | unsigned |
| 671 | ARMul_OSException (ARMul_State * state ATTRIBUTE_UNUSED, |
| 672 | ARMword vector ATTRIBUTE_UNUSED, |
| 673 | ARMword pc ATTRIBUTE_UNUSED) |
| 674 | { |
| 675 | return FALSE; |
| 676 | } |
| 677 | |
| 678 | #endif |
| 679 | #endif /* NOOS */ |