| 1 | /* unwind-ia64.c -- utility routines to dump IA-64 unwind info for readelf. |
| 2 | Copyright 2000, 2001, 2002, 2003, 2005, 2007 Free Software Foundation, Inc. |
| 3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
| 4 | |
| 5 | This file is part of GNU Binutils. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "unwind-ia64.h" |
| 23 | #include <stdio.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | #if __GNUC__ >= 2 |
| 27 | /* Define BFD64 here, even if our default architecture is 32 bit ELF |
| 28 | as this will allow us to read in and parse 64bit and 32bit ELF files. |
| 29 | Only do this if we believe that the compiler can support a 64 bit |
| 30 | data type. For now we only rely on GCC being able to do this. */ |
| 31 | #define BFD64 |
| 32 | #endif |
| 33 | #include "bfd.h" |
| 34 | |
| 35 | static bfd_vma unw_rlen = 0; |
| 36 | |
| 37 | static void unw_print_brmask (char *, unsigned int); |
| 38 | static void unw_print_grmask (char *, unsigned int); |
| 39 | static void unw_print_frmask (char *, unsigned int); |
| 40 | static void unw_print_abreg (char *, unsigned int); |
| 41 | static void unw_print_xyreg (char *, unsigned int, unsigned int); |
| 42 | |
| 43 | static void |
| 44 | unw_print_brmask (char *cp, unsigned int mask) |
| 45 | { |
| 46 | int sep = 0; |
| 47 | int i; |
| 48 | |
| 49 | for (i = 0; mask && (i < 5); ++i) |
| 50 | { |
| 51 | if (mask & 1) |
| 52 | { |
| 53 | if (sep) |
| 54 | *cp++ = ','; |
| 55 | *cp++ = 'b'; |
| 56 | *cp++ = i + 1 + '0'; |
| 57 | sep = 1; |
| 58 | } |
| 59 | mask >>= 1; |
| 60 | } |
| 61 | *cp = '\0'; |
| 62 | } |
| 63 | |
| 64 | static void |
| 65 | unw_print_grmask (char *cp, unsigned int mask) |
| 66 | { |
| 67 | int sep = 0; |
| 68 | int i; |
| 69 | |
| 70 | for (i = 0; i < 4; ++i) |
| 71 | { |
| 72 | if (mask & 1) |
| 73 | { |
| 74 | if (sep) |
| 75 | *cp++ = ','; |
| 76 | *cp++ = 'r'; |
| 77 | *cp++ = i + 4 + '0'; |
| 78 | sep = 1; |
| 79 | } |
| 80 | mask >>= 1; |
| 81 | } |
| 82 | *cp = '\0'; |
| 83 | } |
| 84 | |
| 85 | static void |
| 86 | unw_print_frmask (char *cp, unsigned int mask) |
| 87 | { |
| 88 | int sep = 0; |
| 89 | int i; |
| 90 | |
| 91 | for (i = 0; i < 20; ++i) |
| 92 | { |
| 93 | if (mask & 1) |
| 94 | { |
| 95 | if (sep) |
| 96 | *cp++ = ','; |
| 97 | *cp++ = 'f'; |
| 98 | if (i < 4) |
| 99 | *cp++ = i + 2 + '0'; |
| 100 | else |
| 101 | { |
| 102 | *cp++ = (i + 2) / 10 + 1 + '0'; |
| 103 | *cp++ = (i + 2) % 10 + '0'; |
| 104 | } |
| 105 | sep = 1; |
| 106 | } |
| 107 | mask >>= 1; |
| 108 | } |
| 109 | *cp = '\0'; |
| 110 | } |
| 111 | |
| 112 | static void |
| 113 | unw_print_abreg (char *cp, unsigned int abreg) |
| 114 | { |
| 115 | static const char * const special_reg[16] = |
| 116 | { |
| 117 | "pr", "psp", "@priunat", "rp", "ar.bsp", "ar.bspstore", "ar.rnat", |
| 118 | "ar.unat", "ar.fpsr", "ar.pfs", "ar.lc", |
| 119 | "Unknown11", "Unknown12", "Unknown13", "Unknown14", "Unknown15" |
| 120 | }; |
| 121 | |
| 122 | switch ((abreg >> 5) & 0x3) |
| 123 | { |
| 124 | case 0: /* gr */ |
| 125 | sprintf (cp, "r%u", (abreg & 0x1f)); |
| 126 | break; |
| 127 | |
| 128 | case 1: /* fr */ |
| 129 | sprintf (cp, "f%u", (abreg & 0x1f)); |
| 130 | break; |
| 131 | |
| 132 | case 2: /* br */ |
| 133 | sprintf (cp, "b%u", (abreg & 0x1f)); |
| 134 | break; |
| 135 | |
| 136 | case 3: /* special */ |
| 137 | strcpy (cp, special_reg[abreg & 0xf]); |
| 138 | break; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | static void |
| 143 | unw_print_xyreg (char *cp, unsigned int x, unsigned int ytreg) |
| 144 | { |
| 145 | switch ((x << 1) | ((ytreg >> 7) & 1)) |
| 146 | { |
| 147 | case 0: /* gr */ |
| 148 | sprintf (cp, "r%u", (ytreg & 0x1f)); |
| 149 | break; |
| 150 | |
| 151 | case 1: /* fr */ |
| 152 | sprintf (cp, "f%u", (ytreg & 0x1f)); |
| 153 | break; |
| 154 | |
| 155 | case 2: /* br */ |
| 156 | sprintf (cp, "b%u", (ytreg & 0x1f)); |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | #define UNW_REG_BSP "bsp" |
| 162 | #define UNW_REG_BSPSTORE "bspstore" |
| 163 | #define UNW_REG_FPSR "fpsr" |
| 164 | #define UNW_REG_LC "lc" |
| 165 | #define UNW_REG_PFS "pfs" |
| 166 | #define UNW_REG_PR "pr" |
| 167 | #define UNW_REG_PSP "psp" |
| 168 | #define UNW_REG_RNAT "rnat" |
| 169 | #define UNW_REG_RP "rp" |
| 170 | #define UNW_REG_UNAT "unat" |
| 171 | |
| 172 | typedef bfd_vma unw_word; |
| 173 | |
| 174 | #define UNW_DEC_BAD_CODE(code) \ |
| 175 | printf ("Unknown code 0x%02x\n", code) |
| 176 | |
| 177 | #define UNW_DEC_PROLOGUE(fmt, body, rlen, arg) \ |
| 178 | do \ |
| 179 | { \ |
| 180 | unw_rlen = rlen; \ |
| 181 | *(int *)arg = body; \ |
| 182 | printf (" %s:%s(rlen=%lu)\n", \ |
| 183 | fmt, body ? "body" : "prologue", (unsigned long) rlen); \ |
| 184 | } \ |
| 185 | while (0) |
| 186 | |
| 187 | #define UNW_DEC_PROLOGUE_GR(fmt, rlen, mask, grsave, arg) \ |
| 188 | do \ |
| 189 | { \ |
| 190 | char regname[16], maskstr[64], *sep; \ |
| 191 | \ |
| 192 | unw_rlen = rlen; \ |
| 193 | *(int *)arg = 0; \ |
| 194 | \ |
| 195 | maskstr[0] = '\0'; \ |
| 196 | sep = ""; \ |
| 197 | if (mask & 0x8) \ |
| 198 | { \ |
| 199 | strcat (maskstr, "rp"); \ |
| 200 | sep = ","; \ |
| 201 | } \ |
| 202 | if (mask & 0x4) \ |
| 203 | { \ |
| 204 | strcat (maskstr, sep); \ |
| 205 | strcat (maskstr, "ar.pfs"); \ |
| 206 | sep = ","; \ |
| 207 | } \ |
| 208 | if (mask & 0x2) \ |
| 209 | { \ |
| 210 | strcat (maskstr, sep); \ |
| 211 | strcat (maskstr, "psp"); \ |
| 212 | sep = ","; \ |
| 213 | } \ |
| 214 | if (mask & 0x1) \ |
| 215 | { \ |
| 216 | strcat (maskstr, sep); \ |
| 217 | strcat (maskstr, "pr"); \ |
| 218 | } \ |
| 219 | sprintf (regname, "r%u", grsave); \ |
| 220 | printf (" %s:prologue_gr(mask=[%s],grsave=%s,rlen=%lu)\n", \ |
| 221 | fmt, maskstr, regname, (unsigned long) rlen); \ |
| 222 | } \ |
| 223 | while (0) |
| 224 | |
| 225 | #define UNW_DEC_FR_MEM(fmt, frmask, arg) \ |
| 226 | do \ |
| 227 | { \ |
| 228 | char frstr[200]; \ |
| 229 | \ |
| 230 | unw_print_frmask (frstr, frmask); \ |
| 231 | printf ("\t%s:fr_mem(frmask=[%s])\n", fmt, frstr); \ |
| 232 | } \ |
| 233 | while (0) |
| 234 | |
| 235 | #define UNW_DEC_GR_MEM(fmt, grmask, arg) \ |
| 236 | do \ |
| 237 | { \ |
| 238 | char grstr[200]; \ |
| 239 | \ |
| 240 | unw_print_grmask (grstr, grmask); \ |
| 241 | printf ("\t%s:gr_mem(grmask=[%s])\n", fmt, grstr); \ |
| 242 | } \ |
| 243 | while (0) |
| 244 | |
| 245 | #define UNW_DEC_FRGR_MEM(fmt, grmask, frmask, arg) \ |
| 246 | do \ |
| 247 | { \ |
| 248 | char frstr[200], grstr[20]; \ |
| 249 | \ |
| 250 | unw_print_grmask (grstr, grmask); \ |
| 251 | unw_print_frmask (frstr, frmask); \ |
| 252 | printf ("\t%s:frgr_mem(grmask=[%s],frmask=[%s])\n", fmt, grstr, frstr); \ |
| 253 | } \ |
| 254 | while (0) |
| 255 | |
| 256 | #define UNW_DEC_BR_MEM(fmt, brmask, arg) \ |
| 257 | do \ |
| 258 | { \ |
| 259 | char brstr[20]; \ |
| 260 | \ |
| 261 | unw_print_brmask (brstr, brmask); \ |
| 262 | printf ("\t%s:br_mem(brmask=[%s])\n", fmt, brstr); \ |
| 263 | } \ |
| 264 | while (0) |
| 265 | |
| 266 | #define UNW_DEC_BR_GR(fmt, brmask, gr, arg) \ |
| 267 | do \ |
| 268 | { \ |
| 269 | char brstr[20]; \ |
| 270 | \ |
| 271 | unw_print_brmask (brstr, brmask); \ |
| 272 | printf ("\t%s:br_gr(brmask=[%s],gr=r%u)\n", fmt, brstr, gr); \ |
| 273 | } \ |
| 274 | while (0) |
| 275 | |
| 276 | #define UNW_DEC_REG_GR(fmt, src, dst, arg) \ |
| 277 | printf ("\t%s:%s_gr(reg=r%u)\n", fmt, src, dst) |
| 278 | |
| 279 | #define UNW_DEC_RP_BR(fmt, dst, arg) \ |
| 280 | printf ("\t%s:rp_br(reg=b%u)\n", fmt, dst) |
| 281 | |
| 282 | #define UNW_DEC_REG_WHEN(fmt, reg, t, arg) \ |
| 283 | printf ("\t%s:%s_when(t=%lu)\n", fmt, reg, (unsigned long) t) |
| 284 | |
| 285 | #define UNW_DEC_REG_SPREL(fmt, reg, spoff, arg) \ |
| 286 | printf ("\t%s:%s_sprel(spoff=0x%lx)\n", \ |
| 287 | fmt, reg, 4*(unsigned long)spoff) |
| 288 | |
| 289 | #define UNW_DEC_REG_PSPREL(fmt, reg, pspoff, arg) \ |
| 290 | printf ("\t%s:%s_psprel(pspoff=0x10-0x%lx)\n", \ |
| 291 | fmt, reg, 4*(unsigned long)pspoff) |
| 292 | |
| 293 | #define UNW_DEC_GR_GR(fmt, grmask, gr, arg) \ |
| 294 | do \ |
| 295 | { \ |
| 296 | char grstr[20]; \ |
| 297 | \ |
| 298 | unw_print_grmask (grstr, grmask); \ |
| 299 | printf ("\t%s:gr_gr(grmask=[%s],r%u)\n", fmt, grstr, gr); \ |
| 300 | } \ |
| 301 | while (0) |
| 302 | |
| 303 | #define UNW_DEC_ABI(fmt, abi, context, arg) \ |
| 304 | do \ |
| 305 | { \ |
| 306 | static const char * const abiname[] = \ |
| 307 | { \ |
| 308 | "@svr4", "@hpux", "@nt" \ |
| 309 | }; \ |
| 310 | char buf[20]; \ |
| 311 | const char *abistr = buf; \ |
| 312 | \ |
| 313 | if (abi < 3) \ |
| 314 | abistr = abiname[abi]; \ |
| 315 | else \ |
| 316 | sprintf (buf, "0x%x", abi); \ |
| 317 | printf ("\t%s:unwabi(abi=%s,context=0x%02x)\n", \ |
| 318 | fmt, abistr, context); \ |
| 319 | } \ |
| 320 | while (0) |
| 321 | |
| 322 | #define UNW_DEC_PRIUNAT_GR(fmt, r, arg) \ |
| 323 | printf ("\t%s:priunat_gr(reg=r%u)\n", fmt, r) |
| 324 | |
| 325 | #define UNW_DEC_PRIUNAT_WHEN_GR(fmt, t, arg) \ |
| 326 | printf ("\t%s:priunat_when_gr(t=%lu)\n", fmt, (unsigned long) t) |
| 327 | |
| 328 | #define UNW_DEC_PRIUNAT_WHEN_MEM(fmt, t, arg) \ |
| 329 | printf ("\t%s:priunat_when_mem(t=%lu)\n", fmt, (unsigned long) t) |
| 330 | |
| 331 | #define UNW_DEC_PRIUNAT_PSPREL(fmt, pspoff, arg) \ |
| 332 | printf ("\t%s:priunat_psprel(pspoff=0x10-0x%lx)\n", \ |
| 333 | fmt, 4*(unsigned long)pspoff) |
| 334 | |
| 335 | #define UNW_DEC_PRIUNAT_SPREL(fmt, spoff, arg) \ |
| 336 | printf ("\t%s:priunat_sprel(spoff=0x%lx)\n", \ |
| 337 | fmt, 4*(unsigned long)spoff) |
| 338 | |
| 339 | #define UNW_DEC_MEM_STACK_F(fmt, t, size, arg) \ |
| 340 | printf ("\t%s:mem_stack_f(t=%lu,size=%lu)\n", \ |
| 341 | fmt, (unsigned long) t, 16*(unsigned long)size) |
| 342 | |
| 343 | #define UNW_DEC_MEM_STACK_V(fmt, t, arg) \ |
| 344 | printf ("\t%s:mem_stack_v(t=%lu)\n", fmt, (unsigned long) t) |
| 345 | |
| 346 | #define UNW_DEC_SPILL_BASE(fmt, pspoff, arg) \ |
| 347 | printf ("\t%s:spill_base(pspoff=0x10-0x%lx)\n", \ |
| 348 | fmt, 4*(unsigned long)pspoff) |
| 349 | |
| 350 | #define UNW_DEC_SPILL_MASK(fmt, dp, arg) \ |
| 351 | do \ |
| 352 | { \ |
| 353 | static const char *spill_type = "-frb"; \ |
| 354 | unsigned const char *imaskp = dp; \ |
| 355 | unsigned char mask = 0; \ |
| 356 | bfd_vma insn = 0; \ |
| 357 | \ |
| 358 | printf ("\t%s:spill_mask(imask=[", fmt); \ |
| 359 | for (insn = 0; insn < unw_rlen; ++insn) \ |
| 360 | { \ |
| 361 | if ((insn % 4) == 0) \ |
| 362 | mask = *imaskp++; \ |
| 363 | if (insn > 0 && (insn % 3) == 0) \ |
| 364 | putchar (','); \ |
| 365 | putchar (spill_type[(mask >> (2 * (3 - (insn & 0x3)))) & 0x3]); \ |
| 366 | } \ |
| 367 | printf ("])\n"); \ |
| 368 | dp = imaskp; \ |
| 369 | } \ |
| 370 | while (0) |
| 371 | |
| 372 | #define UNW_DEC_SPILL_SPREL(fmt, t, abreg, spoff, arg) \ |
| 373 | do \ |
| 374 | { \ |
| 375 | char regname[20]; \ |
| 376 | \ |
| 377 | unw_print_abreg (regname, abreg); \ |
| 378 | printf ("\t%s:spill_sprel(reg=%s,t=%lu,spoff=0x%lx)\n", \ |
| 379 | fmt, regname, (unsigned long) t, 4*(unsigned long)off); \ |
| 380 | } \ |
| 381 | while (0) |
| 382 | |
| 383 | #define UNW_DEC_SPILL_PSPREL(fmt, t, abreg, pspoff, arg) \ |
| 384 | do \ |
| 385 | { \ |
| 386 | char regname[20]; \ |
| 387 | \ |
| 388 | unw_print_abreg (regname, abreg); \ |
| 389 | printf ("\t%s:spill_psprel(reg=%s,t=%lu,pspoff=0x10-0x%lx)\n", \ |
| 390 | fmt, regname, (unsigned long) t, 4*(unsigned long)pspoff); \ |
| 391 | } \ |
| 392 | while (0) |
| 393 | |
| 394 | #define UNW_DEC_RESTORE(fmt, t, abreg, arg) \ |
| 395 | do \ |
| 396 | { \ |
| 397 | char regname[20]; \ |
| 398 | \ |
| 399 | unw_print_abreg (regname, abreg); \ |
| 400 | printf ("\t%s:restore(t=%lu,reg=%s)\n", \ |
| 401 | fmt, (unsigned long) t, regname); \ |
| 402 | } \ |
| 403 | while (0) |
| 404 | |
| 405 | #define UNW_DEC_SPILL_REG(fmt, t, abreg, x, ytreg, arg) \ |
| 406 | do \ |
| 407 | { \ |
| 408 | char abregname[20], tregname[20]; \ |
| 409 | \ |
| 410 | unw_print_abreg (abregname, abreg); \ |
| 411 | unw_print_xyreg (tregname, x, ytreg); \ |
| 412 | printf ("\t%s:spill_reg(t=%lu,reg=%s,treg=%s)\n", \ |
| 413 | fmt, (unsigned long) t, abregname, tregname); \ |
| 414 | } \ |
| 415 | while (0) |
| 416 | |
| 417 | #define UNW_DEC_SPILL_SPREL_P(fmt, qp, t, abreg, spoff, arg) \ |
| 418 | do \ |
| 419 | { \ |
| 420 | char regname[20]; \ |
| 421 | \ |
| 422 | unw_print_abreg (regname, abreg); \ |
| 423 | printf ("\t%s:spill_sprel_p(qp=p%u,t=%lu,reg=%s,spoff=0x%lx)\n", \ |
| 424 | fmt, qp, (unsigned long) t, regname, 4 * (unsigned long)spoff); \ |
| 425 | } \ |
| 426 | while (0) |
| 427 | |
| 428 | #define UNW_DEC_SPILL_PSPREL_P(fmt, qp, t, abreg, pspoff, arg) \ |
| 429 | do \ |
| 430 | { \ |
| 431 | char regname[20]; \ |
| 432 | \ |
| 433 | unw_print_abreg (regname, abreg); \ |
| 434 | printf ("\t%s:spill_psprel_p(qp=p%u,t=%lu,reg=%s,pspoff=0x10-0x%lx)\n",\ |
| 435 | fmt, qp, (unsigned long) t, regname, 4*(unsigned long)pspoff);\ |
| 436 | } \ |
| 437 | while (0) |
| 438 | |
| 439 | #define UNW_DEC_RESTORE_P(fmt, qp, t, abreg, arg) \ |
| 440 | do \ |
| 441 | { \ |
| 442 | char regname[20]; \ |
| 443 | \ |
| 444 | unw_print_abreg (regname, abreg); \ |
| 445 | printf ("\t%s:restore_p(qp=p%u,t=%lu,reg=%s)\n", \ |
| 446 | fmt, qp, (unsigned long) t, regname); \ |
| 447 | } \ |
| 448 | while (0) |
| 449 | |
| 450 | #define UNW_DEC_SPILL_REG_P(fmt, qp, t, abreg, x, ytreg, arg) \ |
| 451 | do \ |
| 452 | { \ |
| 453 | char regname[20], tregname[20]; \ |
| 454 | \ |
| 455 | unw_print_abreg (regname, abreg); \ |
| 456 | unw_print_xyreg (tregname, x, ytreg); \ |
| 457 | printf ("\t%s:spill_reg_p(qp=p%u,t=%lu,reg=%s,treg=%s)\n", \ |
| 458 | fmt, qp, (unsigned long) t, regname, tregname); \ |
| 459 | } \ |
| 460 | while (0) |
| 461 | |
| 462 | #define UNW_DEC_LABEL_STATE(fmt, label, arg) \ |
| 463 | printf ("\t%s:label_state(label=%lu)\n", fmt, (unsigned long) label) |
| 464 | |
| 465 | #define UNW_DEC_COPY_STATE(fmt, label, arg) \ |
| 466 | printf ("\t%s:copy_state(label=%lu)\n", fmt, (unsigned long) label) |
| 467 | |
| 468 | #define UNW_DEC_EPILOGUE(fmt, t, ecount, arg) \ |
| 469 | printf ("\t%s:epilogue(t=%lu,ecount=%lu)\n", \ |
| 470 | fmt, (unsigned long) t, (unsigned long) ecount) |
| 471 | |
| 472 | /* |
| 473 | * Generic IA-64 unwind info decoder. |
| 474 | * |
| 475 | * This file is used both by the Linux kernel and objdump. Please |
| 476 | * keep the two copies of this file in sync (modulo differences in the |
| 477 | * prototypes...). |
| 478 | * |
| 479 | * You need to customize the decoder by defining the following |
| 480 | * macros/constants before including this file: |
| 481 | * |
| 482 | * Types: |
| 483 | * unw_word Unsigned integer type with at least 64 bits |
| 484 | * |
| 485 | * Register names: |
| 486 | * UNW_REG_BSP |
| 487 | * UNW_REG_BSPSTORE |
| 488 | * UNW_REG_FPSR |
| 489 | * UNW_REG_LC |
| 490 | * UNW_REG_PFS |
| 491 | * UNW_REG_PR |
| 492 | * UNW_REG_RNAT |
| 493 | * UNW_REG_PSP |
| 494 | * UNW_REG_RP |
| 495 | * UNW_REG_UNAT |
| 496 | * |
| 497 | * Decoder action macros: |
| 498 | * UNW_DEC_BAD_CODE(code) |
| 499 | * UNW_DEC_ABI(fmt,abi,context,arg) |
| 500 | * UNW_DEC_BR_GR(fmt,brmask,gr,arg) |
| 501 | * UNW_DEC_BR_MEM(fmt,brmask,arg) |
| 502 | * UNW_DEC_COPY_STATE(fmt,label,arg) |
| 503 | * UNW_DEC_EPILOGUE(fmt,t,ecount,arg) |
| 504 | * UNW_DEC_FRGR_MEM(fmt,grmask,frmask,arg) |
| 505 | * UNW_DEC_FR_MEM(fmt,frmask,arg) |
| 506 | * UNW_DEC_GR_GR(fmt,grmask,gr,arg) |
| 507 | * UNW_DEC_GR_MEM(fmt,grmask,arg) |
| 508 | * UNW_DEC_LABEL_STATE(fmt,label,arg) |
| 509 | * UNW_DEC_MEM_STACK_F(fmt,t,size,arg) |
| 510 | * UNW_DEC_MEM_STACK_V(fmt,t,arg) |
| 511 | * UNW_DEC_PRIUNAT_GR(fmt,r,arg) |
| 512 | * UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg) |
| 513 | * UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg) |
| 514 | * UNW_DEC_PRIUNAT_WHEN_PSPREL(fmt,pspoff,arg) |
| 515 | * UNW_DEC_PRIUNAT_WHEN_SPREL(fmt,spoff,arg) |
| 516 | * UNW_DEC_PROLOGUE(fmt,body,rlen,arg) |
| 517 | * UNW_DEC_PROLOGUE_GR(fmt,rlen,mask,grsave,arg) |
| 518 | * UNW_DEC_REG_PSPREL(fmt,reg,pspoff,arg) |
| 519 | * UNW_DEC_REG_REG(fmt,src,dst,arg) |
| 520 | * UNW_DEC_REG_SPREL(fmt,reg,spoff,arg) |
| 521 | * UNW_DEC_REG_WHEN(fmt,reg,t,arg) |
| 522 | * UNW_DEC_RESTORE(fmt,t,abreg,arg) |
| 523 | * UNW_DEC_RESTORE_P(fmt,qp,t,abreg,arg) |
| 524 | * UNW_DEC_SPILL_BASE(fmt,pspoff,arg) |
| 525 | * UNW_DEC_SPILL_MASK(fmt,imaskp,arg) |
| 526 | * UNW_DEC_SPILL_PSPREL(fmt,t,abreg,pspoff,arg) |
| 527 | * UNW_DEC_SPILL_PSPREL_P(fmt,qp,t,abreg,pspoff,arg) |
| 528 | * UNW_DEC_SPILL_REG(fmt,t,abreg,x,ytreg,arg) |
| 529 | * UNW_DEC_SPILL_REG_P(fmt,qp,t,abreg,x,ytreg,arg) |
| 530 | * UNW_DEC_SPILL_SPREL(fmt,t,abreg,spoff,arg) |
| 531 | * UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg) |
| 532 | */ |
| 533 | |
| 534 | static unw_word unw_decode_uleb128 (const unsigned char **); |
| 535 | static const unsigned char *unw_decode_x1 |
| 536 | (const unsigned char *, unsigned int, void *); |
| 537 | static const unsigned char *unw_decode_x2 |
| 538 | (const unsigned char *, unsigned int, void *); |
| 539 | static const unsigned char *unw_decode_x3 |
| 540 | (const unsigned char *, unsigned int, void *); |
| 541 | static const unsigned char *unw_decode_x4 |
| 542 | (const unsigned char *, unsigned int, void *); |
| 543 | static const unsigned char *unw_decode_r1 |
| 544 | (const unsigned char *, unsigned int, void *); |
| 545 | static const unsigned char *unw_decode_r2 |
| 546 | (const unsigned char *, unsigned int, void *); |
| 547 | static const unsigned char *unw_decode_r3 |
| 548 | (const unsigned char *, unsigned int, void *); |
| 549 | static const unsigned char *unw_decode_p1 |
| 550 | (const unsigned char *, unsigned int, void *); |
| 551 | static const unsigned char *unw_decode_p2_p5 |
| 552 | (const unsigned char *, unsigned int, void *); |
| 553 | static const unsigned char *unw_decode_p6 |
| 554 | (const unsigned char *, unsigned int, void *); |
| 555 | static const unsigned char *unw_decode_p7_p10 |
| 556 | (const unsigned char *, unsigned int, void *); |
| 557 | static const unsigned char *unw_decode_b1 |
| 558 | (const unsigned char *, unsigned int, void *); |
| 559 | static const unsigned char *unw_decode_b2 |
| 560 | (const unsigned char *, unsigned int, void *); |
| 561 | static const unsigned char *unw_decode_b3_x4 |
| 562 | (const unsigned char *, unsigned int, void *); |
| 563 | |
| 564 | static unw_word |
| 565 | unw_decode_uleb128 (const unsigned char **dpp) |
| 566 | { |
| 567 | unsigned shift = 0; |
| 568 | unw_word byte, result = 0; |
| 569 | const unsigned char *bp = *dpp; |
| 570 | |
| 571 | while (1) |
| 572 | { |
| 573 | byte = *bp++; |
| 574 | result |= (byte & 0x7f) << shift; |
| 575 | |
| 576 | if ((byte & 0x80) == 0) |
| 577 | break; |
| 578 | |
| 579 | shift += 7; |
| 580 | } |
| 581 | |
| 582 | *dpp = bp; |
| 583 | |
| 584 | return result; |
| 585 | } |
| 586 | |
| 587 | static const unsigned char * |
| 588 | unw_decode_x1 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| 589 | void *arg ATTRIBUTE_UNUSED) |
| 590 | { |
| 591 | unsigned char byte1, abreg; |
| 592 | unw_word t, off; |
| 593 | |
| 594 | byte1 = *dp++; |
| 595 | t = unw_decode_uleb128 (&dp); |
| 596 | off = unw_decode_uleb128 (&dp); |
| 597 | abreg = (byte1 & 0x7f); |
| 598 | if (byte1 & 0x80) |
| 599 | UNW_DEC_SPILL_SPREL ("X1", t, abreg, off, arg); |
| 600 | else |
| 601 | UNW_DEC_SPILL_PSPREL ("X1", t, abreg, off, arg); |
| 602 | return dp; |
| 603 | } |
| 604 | |
| 605 | static const unsigned char * |
| 606 | unw_decode_x2 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| 607 | void *arg ATTRIBUTE_UNUSED) |
| 608 | { |
| 609 | unsigned char byte1, byte2, abreg, x, ytreg; |
| 610 | unw_word t; |
| 611 | |
| 612 | byte1 = *dp++; |
| 613 | byte2 = *dp++; |
| 614 | t = unw_decode_uleb128 (&dp); |
| 615 | abreg = (byte1 & 0x7f); |
| 616 | ytreg = byte2; |
| 617 | x = (byte1 >> 7) & 1; |
| 618 | if ((byte1 & 0x80) == 0 && ytreg == 0) |
| 619 | UNW_DEC_RESTORE ("X2", t, abreg, arg); |
| 620 | else |
| 621 | UNW_DEC_SPILL_REG ("X2", t, abreg, x, ytreg, arg); |
| 622 | return dp; |
| 623 | } |
| 624 | |
| 625 | static const unsigned char * |
| 626 | unw_decode_x3 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| 627 | void *arg ATTRIBUTE_UNUSED) |
| 628 | { |
| 629 | unsigned char byte1, byte2, abreg, qp; |
| 630 | unw_word t, off; |
| 631 | |
| 632 | byte1 = *dp++; |
| 633 | byte2 = *dp++; |
| 634 | t = unw_decode_uleb128 (&dp); |
| 635 | off = unw_decode_uleb128 (&dp); |
| 636 | |
| 637 | qp = (byte1 & 0x3f); |
| 638 | abreg = (byte2 & 0x7f); |
| 639 | |
| 640 | if (byte1 & 0x80) |
| 641 | UNW_DEC_SPILL_SPREL_P ("X3", qp, t, abreg, off, arg); |
| 642 | else |
| 643 | UNW_DEC_SPILL_PSPREL_P ("X3", qp, t, abreg, off, arg); |
| 644 | return dp; |
| 645 | } |
| 646 | |
| 647 | static const unsigned char * |
| 648 | unw_decode_x4 (const unsigned char *dp, unsigned int code ATTRIBUTE_UNUSED, |
| 649 | void *arg ATTRIBUTE_UNUSED) |
| 650 | { |
| 651 | unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg; |
| 652 | unw_word t; |
| 653 | |
| 654 | byte1 = *dp++; |
| 655 | byte2 = *dp++; |
| 656 | byte3 = *dp++; |
| 657 | t = unw_decode_uleb128 (&dp); |
| 658 | |
| 659 | qp = (byte1 & 0x3f); |
| 660 | abreg = (byte2 & 0x7f); |
| 661 | x = (byte2 >> 7) & 1; |
| 662 | ytreg = byte3; |
| 663 | |
| 664 | if ((byte2 & 0x80) == 0 && byte3 == 0) |
| 665 | UNW_DEC_RESTORE_P ("X4", qp, t, abreg, arg); |
| 666 | else |
| 667 | UNW_DEC_SPILL_REG_P ("X4", qp, t, abreg, x, ytreg, arg); |
| 668 | return dp; |
| 669 | } |
| 670 | |
| 671 | static const unsigned char * |
| 672 | unw_decode_r1 (const unsigned char *dp, unsigned int code, void *arg) |
| 673 | { |
| 674 | int body = (code & 0x20) != 0; |
| 675 | unw_word rlen; |
| 676 | |
| 677 | rlen = (code & 0x1f); |
| 678 | UNW_DEC_PROLOGUE ("R1", body, rlen, arg); |
| 679 | return dp; |
| 680 | } |
| 681 | |
| 682 | static const unsigned char * |
| 683 | unw_decode_r2 (const unsigned char *dp, unsigned int code, void *arg) |
| 684 | { |
| 685 | unsigned char byte1, mask, grsave; |
| 686 | unw_word rlen; |
| 687 | |
| 688 | byte1 = *dp++; |
| 689 | |
| 690 | mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); |
| 691 | grsave = (byte1 & 0x7f); |
| 692 | rlen = unw_decode_uleb128 (& dp); |
| 693 | UNW_DEC_PROLOGUE_GR ("R2", rlen, mask, grsave, arg); |
| 694 | return dp; |
| 695 | } |
| 696 | |
| 697 | static const unsigned char * |
| 698 | unw_decode_r3 (const unsigned char *dp, unsigned int code, void *arg) |
| 699 | { |
| 700 | unw_word rlen; |
| 701 | |
| 702 | rlen = unw_decode_uleb128 (& dp); |
| 703 | UNW_DEC_PROLOGUE ("R3", ((code & 0x3) == 1), rlen, arg); |
| 704 | return dp; |
| 705 | } |
| 706 | |
| 707 | static const unsigned char * |
| 708 | unw_decode_p1 (const unsigned char *dp, unsigned int code, |
| 709 | void *arg ATTRIBUTE_UNUSED) |
| 710 | { |
| 711 | unsigned char brmask = (code & 0x1f); |
| 712 | |
| 713 | UNW_DEC_BR_MEM ("P1", brmask, arg); |
| 714 | return dp; |
| 715 | } |
| 716 | |
| 717 | static const unsigned char * |
| 718 | unw_decode_p2_p5 (const unsigned char *dp, unsigned int code, |
| 719 | void *arg ATTRIBUTE_UNUSED) |
| 720 | { |
| 721 | if ((code & 0x10) == 0) |
| 722 | { |
| 723 | unsigned char byte1 = *dp++; |
| 724 | |
| 725 | UNW_DEC_BR_GR ("P2", ((code & 0xf) << 1) | ((byte1 >> 7) & 1), |
| 726 | (byte1 & 0x7f), arg); |
| 727 | } |
| 728 | else if ((code & 0x08) == 0) |
| 729 | { |
| 730 | unsigned char byte1 = *dp++, r, dst; |
| 731 | |
| 732 | r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); |
| 733 | dst = (byte1 & 0x7f); |
| 734 | switch (r) |
| 735 | { |
| 736 | case 0: |
| 737 | UNW_DEC_REG_GR ("P3", UNW_REG_PSP, dst, arg); |
| 738 | break; |
| 739 | case 1: |
| 740 | UNW_DEC_REG_GR ("P3", UNW_REG_RP, dst, arg); |
| 741 | break; |
| 742 | case 2: |
| 743 | UNW_DEC_REG_GR ("P3", UNW_REG_PFS, dst, arg); |
| 744 | break; |
| 745 | case 3: |
| 746 | UNW_DEC_REG_GR ("P3", UNW_REG_PR, dst, arg); |
| 747 | break; |
| 748 | case 4: |
| 749 | UNW_DEC_REG_GR ("P3", UNW_REG_UNAT, dst, arg); |
| 750 | break; |
| 751 | case 5: |
| 752 | UNW_DEC_REG_GR ("P3", UNW_REG_LC, dst, arg); |
| 753 | break; |
| 754 | case 6: |
| 755 | UNW_DEC_RP_BR ("P3", dst, arg); |
| 756 | break; |
| 757 | case 7: |
| 758 | UNW_DEC_REG_GR ("P3", UNW_REG_RNAT, dst, arg); |
| 759 | break; |
| 760 | case 8: |
| 761 | UNW_DEC_REG_GR ("P3", UNW_REG_BSP, dst, arg); |
| 762 | break; |
| 763 | case 9: |
| 764 | UNW_DEC_REG_GR ("P3", UNW_REG_BSPSTORE, dst, arg); |
| 765 | break; |
| 766 | case 10: |
| 767 | UNW_DEC_REG_GR ("P3", UNW_REG_FPSR, dst, arg); |
| 768 | break; |
| 769 | case 11: |
| 770 | UNW_DEC_PRIUNAT_GR ("P3", dst, arg); |
| 771 | break; |
| 772 | default: |
| 773 | UNW_DEC_BAD_CODE (r); |
| 774 | break; |
| 775 | } |
| 776 | } |
| 777 | else if ((code & 0x7) == 0) |
| 778 | UNW_DEC_SPILL_MASK ("P4", dp, arg); |
| 779 | else if ((code & 0x7) == 1) |
| 780 | { |
| 781 | unw_word grmask, frmask, byte1, byte2, byte3; |
| 782 | |
| 783 | byte1 = *dp++; |
| 784 | byte2 = *dp++; |
| 785 | byte3 = *dp++; |
| 786 | grmask = ((byte1 >> 4) & 0xf); |
| 787 | frmask = ((byte1 & 0xf) << 16) | (byte2 << 8) | byte3; |
| 788 | UNW_DEC_FRGR_MEM ("P5", grmask, frmask, arg); |
| 789 | } |
| 790 | else |
| 791 | UNW_DEC_BAD_CODE (code); |
| 792 | |
| 793 | return dp; |
| 794 | } |
| 795 | |
| 796 | static const unsigned char * |
| 797 | unw_decode_p6 (const unsigned char *dp, unsigned int code, |
| 798 | void *arg ATTRIBUTE_UNUSED) |
| 799 | { |
| 800 | int gregs = (code & 0x10) != 0; |
| 801 | unsigned char mask = (code & 0x0f); |
| 802 | |
| 803 | if (gregs) |
| 804 | UNW_DEC_GR_MEM ("P6", mask, arg); |
| 805 | else |
| 806 | UNW_DEC_FR_MEM ("P6", mask, arg); |
| 807 | return dp; |
| 808 | } |
| 809 | |
| 810 | static const unsigned char * |
| 811 | unw_decode_p7_p10 (const unsigned char *dp, unsigned int code, void *arg) |
| 812 | { |
| 813 | unsigned char r, byte1, byte2; |
| 814 | unw_word t, size; |
| 815 | |
| 816 | if ((code & 0x10) == 0) |
| 817 | { |
| 818 | r = (code & 0xf); |
| 819 | t = unw_decode_uleb128 (&dp); |
| 820 | switch (r) |
| 821 | { |
| 822 | case 0: |
| 823 | size = unw_decode_uleb128 (&dp); |
| 824 | UNW_DEC_MEM_STACK_F ("P7", t, size, arg); |
| 825 | break; |
| 826 | |
| 827 | case 1: |
| 828 | UNW_DEC_MEM_STACK_V ("P7", t, arg); |
| 829 | break; |
| 830 | case 2: |
| 831 | UNW_DEC_SPILL_BASE ("P7", t, arg); |
| 832 | break; |
| 833 | case 3: |
| 834 | UNW_DEC_REG_SPREL ("P7", UNW_REG_PSP, t, arg); |
| 835 | break; |
| 836 | case 4: |
| 837 | UNW_DEC_REG_WHEN ("P7", UNW_REG_RP, t, arg); |
| 838 | break; |
| 839 | case 5: |
| 840 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_RP, t, arg); |
| 841 | break; |
| 842 | case 6: |
| 843 | UNW_DEC_REG_WHEN ("P7", UNW_REG_PFS, t, arg); |
| 844 | break; |
| 845 | case 7: |
| 846 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_PFS, t, arg); |
| 847 | break; |
| 848 | case 8: |
| 849 | UNW_DEC_REG_WHEN ("P7", UNW_REG_PR, t, arg); |
| 850 | break; |
| 851 | case 9: |
| 852 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_PR, t, arg); |
| 853 | break; |
| 854 | case 10: |
| 855 | UNW_DEC_REG_WHEN ("P7", UNW_REG_LC, t, arg); |
| 856 | break; |
| 857 | case 11: |
| 858 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_LC, t, arg); |
| 859 | break; |
| 860 | case 12: |
| 861 | UNW_DEC_REG_WHEN ("P7", UNW_REG_UNAT, t, arg); |
| 862 | break; |
| 863 | case 13: |
| 864 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_UNAT, t, arg); |
| 865 | break; |
| 866 | case 14: |
| 867 | UNW_DEC_REG_WHEN ("P7", UNW_REG_FPSR, t, arg); |
| 868 | break; |
| 869 | case 15: |
| 870 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_FPSR, t, arg); |
| 871 | break; |
| 872 | default: |
| 873 | UNW_DEC_BAD_CODE (r); |
| 874 | break; |
| 875 | } |
| 876 | } |
| 877 | else |
| 878 | { |
| 879 | switch (code & 0xf) |
| 880 | { |
| 881 | case 0x0: /* p8 */ |
| 882 | { |
| 883 | r = *dp++; |
| 884 | t = unw_decode_uleb128 (&dp); |
| 885 | switch (r) |
| 886 | { |
| 887 | case 1: |
| 888 | UNW_DEC_REG_SPREL ("P8", UNW_REG_RP, t, arg); |
| 889 | break; |
| 890 | case 2: |
| 891 | UNW_DEC_REG_SPREL ("P8", UNW_REG_PFS, t, arg); |
| 892 | break; |
| 893 | case 3: |
| 894 | UNW_DEC_REG_SPREL ("P8", UNW_REG_PR, t, arg); |
| 895 | break; |
| 896 | case 4: |
| 897 | UNW_DEC_REG_SPREL ("P8", UNW_REG_LC, t, arg); |
| 898 | break; |
| 899 | case 5: |
| 900 | UNW_DEC_REG_SPREL ("P8", UNW_REG_UNAT, t, arg); |
| 901 | break; |
| 902 | case 6: |
| 903 | UNW_DEC_REG_SPREL ("P8", UNW_REG_FPSR, t, arg); |
| 904 | break; |
| 905 | case 7: |
| 906 | UNW_DEC_REG_WHEN ("P8", UNW_REG_BSP, t, arg); |
| 907 | break; |
| 908 | case 8: |
| 909 | UNW_DEC_REG_PSPREL ("P8", UNW_REG_BSP, t, arg); |
| 910 | break; |
| 911 | case 9: |
| 912 | UNW_DEC_REG_SPREL ("P8", UNW_REG_BSP, t, arg); |
| 913 | break; |
| 914 | case 10: |
| 915 | UNW_DEC_REG_WHEN ("P8", UNW_REG_BSPSTORE, t, arg); |
| 916 | break; |
| 917 | case 11: |
| 918 | UNW_DEC_REG_PSPREL ("P8", UNW_REG_BSPSTORE, t, arg); |
| 919 | break; |
| 920 | case 12: |
| 921 | UNW_DEC_REG_SPREL ("P8", UNW_REG_BSPSTORE, t, arg); |
| 922 | break; |
| 923 | case 13: |
| 924 | UNW_DEC_REG_WHEN ("P8", UNW_REG_RNAT, t, arg); |
| 925 | break; |
| 926 | case 14: |
| 927 | UNW_DEC_REG_PSPREL ("P8", UNW_REG_RNAT, t, arg); |
| 928 | break; |
| 929 | case 15: |
| 930 | UNW_DEC_REG_SPREL ("P8", UNW_REG_RNAT, t, arg); |
| 931 | break; |
| 932 | case 16: |
| 933 | UNW_DEC_PRIUNAT_WHEN_GR ("P8", t, arg); |
| 934 | break; |
| 935 | case 17: |
| 936 | UNW_DEC_PRIUNAT_PSPREL ("P8", t, arg); |
| 937 | break; |
| 938 | case 18: |
| 939 | UNW_DEC_PRIUNAT_SPREL ("P8", t, arg); |
| 940 | break; |
| 941 | case 19: |
| 942 | UNW_DEC_PRIUNAT_WHEN_MEM ("P8", t, arg); |
| 943 | break; |
| 944 | default: |
| 945 | UNW_DEC_BAD_CODE (r); |
| 946 | break; |
| 947 | } |
| 948 | } |
| 949 | break; |
| 950 | |
| 951 | case 0x1: |
| 952 | byte1 = *dp++; |
| 953 | byte2 = *dp++; |
| 954 | UNW_DEC_GR_GR ("P9", (byte1 & 0xf), (byte2 & 0x7f), arg); |
| 955 | break; |
| 956 | |
| 957 | case 0xf: /* p10 */ |
| 958 | byte1 = *dp++; |
| 959 | byte2 = *dp++; |
| 960 | UNW_DEC_ABI ("P10", byte1, byte2, arg); |
| 961 | break; |
| 962 | |
| 963 | case 0x9: |
| 964 | return unw_decode_x1 (dp, code, arg); |
| 965 | |
| 966 | case 0xa: |
| 967 | return unw_decode_x2 (dp, code, arg); |
| 968 | |
| 969 | case 0xb: |
| 970 | return unw_decode_x3 (dp, code, arg); |
| 971 | |
| 972 | case 0xc: |
| 973 | return unw_decode_x4 (dp, code, arg); |
| 974 | |
| 975 | default: |
| 976 | UNW_DEC_BAD_CODE (code); |
| 977 | break; |
| 978 | } |
| 979 | } |
| 980 | return dp; |
| 981 | } |
| 982 | |
| 983 | static const unsigned char * |
| 984 | unw_decode_b1 (const unsigned char *dp, unsigned int code, |
| 985 | void *arg ATTRIBUTE_UNUSED) |
| 986 | { |
| 987 | unw_word label = (code & 0x1f); |
| 988 | |
| 989 | if ((code & 0x20) != 0) |
| 990 | UNW_DEC_COPY_STATE ("B1", label, arg); |
| 991 | else |
| 992 | UNW_DEC_LABEL_STATE ("B1", label, arg); |
| 993 | return dp; |
| 994 | } |
| 995 | |
| 996 | static const unsigned char * |
| 997 | unw_decode_b2 (const unsigned char *dp, unsigned int code, |
| 998 | void *arg ATTRIBUTE_UNUSED) |
| 999 | { |
| 1000 | unw_word t; |
| 1001 | |
| 1002 | t = unw_decode_uleb128 (& dp); |
| 1003 | UNW_DEC_EPILOGUE ("B2", t, (code & 0x1f), arg); |
| 1004 | return dp; |
| 1005 | } |
| 1006 | |
| 1007 | static const unsigned char * |
| 1008 | unw_decode_b3_x4 (const unsigned char *dp, unsigned int code, void *arg) |
| 1009 | { |
| 1010 | unw_word t, ecount, label; |
| 1011 | |
| 1012 | if ((code & 0x10) == 0) |
| 1013 | { |
| 1014 | t = unw_decode_uleb128 (&dp); |
| 1015 | ecount = unw_decode_uleb128 (&dp); |
| 1016 | UNW_DEC_EPILOGUE ("B3", t, ecount, arg); |
| 1017 | } |
| 1018 | else if ((code & 0x07) == 0) |
| 1019 | { |
| 1020 | label = unw_decode_uleb128 (&dp); |
| 1021 | if ((code & 0x08) != 0) |
| 1022 | UNW_DEC_COPY_STATE ("B4", label, arg); |
| 1023 | else |
| 1024 | UNW_DEC_LABEL_STATE ("B4", label, arg); |
| 1025 | } |
| 1026 | else |
| 1027 | switch (code & 0x7) |
| 1028 | { |
| 1029 | case 1: |
| 1030 | return unw_decode_x1 (dp, code, arg); |
| 1031 | case 2: |
| 1032 | return unw_decode_x2 (dp, code, arg); |
| 1033 | case 3: |
| 1034 | return unw_decode_x3 (dp, code, arg); |
| 1035 | case 4: |
| 1036 | return unw_decode_x4 (dp, code, arg); |
| 1037 | default: |
| 1038 | UNW_DEC_BAD_CODE (code); |
| 1039 | break; |
| 1040 | } |
| 1041 | return dp; |
| 1042 | } |
| 1043 | |
| 1044 | typedef const unsigned char *(*unw_decoder) |
| 1045 | (const unsigned char *, unsigned int, void *); |
| 1046 | |
| 1047 | static const unw_decoder unw_decode_table[2][8] = |
| 1048 | { |
| 1049 | /* prologue table: */ |
| 1050 | { |
| 1051 | unw_decode_r1, /* 0 */ |
| 1052 | unw_decode_r1, |
| 1053 | unw_decode_r2, |
| 1054 | unw_decode_r3, |
| 1055 | unw_decode_p1, /* 4 */ |
| 1056 | unw_decode_p2_p5, |
| 1057 | unw_decode_p6, |
| 1058 | unw_decode_p7_p10 |
| 1059 | }, |
| 1060 | { |
| 1061 | unw_decode_r1, /* 0 */ |
| 1062 | unw_decode_r1, |
| 1063 | unw_decode_r2, |
| 1064 | unw_decode_r3, |
| 1065 | unw_decode_b1, /* 4 */ |
| 1066 | unw_decode_b1, |
| 1067 | unw_decode_b2, |
| 1068 | unw_decode_b3_x4 |
| 1069 | } |
| 1070 | }; |
| 1071 | |
| 1072 | /* Decode one descriptor and return address of next descriptor. */ |
| 1073 | const unsigned char * |
| 1074 | unw_decode (const unsigned char *dp, int inside_body, |
| 1075 | void *ptr_inside_body) |
| 1076 | { |
| 1077 | unw_decoder decoder; |
| 1078 | unsigned char code; |
| 1079 | |
| 1080 | code = *dp++; |
| 1081 | decoder = unw_decode_table[inside_body][code >> 5]; |
| 1082 | return (*decoder) (dp, code, ptr_inside_body); |
| 1083 | } |