| 1 | /* unwind-ia64.c -- utility routines to dump IA-64 unwind info for readelf. |
| 2 | Copyright 2000, 2001 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 2, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "unwind-ia64.h" |
| 22 | #include <stdio.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #if __GNUC__ >= 2 |
| 26 | /* Define BFD64 here, even if our default architecture is 32 bit ELF |
| 27 | as this will allow us to read in and parse 64bit and 32bit ELF files. |
| 28 | Only do this if we belive that the compiler can support a 64 bit |
| 29 | data type. For now we only rely on GCC being able to do this. */ |
| 30 | #define BFD64 |
| 31 | #endif |
| 32 | #include "bfd.h" |
| 33 | |
| 34 | static bfd_vma unw_rlen = 0; |
| 35 | |
| 36 | static void unw_print_brmask PARAMS ((char *, unsigned int)); |
| 37 | static void unw_print_grmask PARAMS ((char *, unsigned int)); |
| 38 | static void unw_print_frmask PARAMS ((char *, unsigned int)); |
| 39 | static void unw_print_abreg PARAMS ((char *, unsigned int)); |
| 40 | static void unw_print_xyreg PARAMS ((char *, unsigned int, unsigned int)); |
| 41 | |
| 42 | static void |
| 43 | unw_print_brmask (cp, mask) |
| 44 | char * cp; |
| 45 | unsigned int mask; |
| 46 | { |
| 47 | int sep = 0; |
| 48 | int i; |
| 49 | |
| 50 | for (i = 0; mask && (i < 5); ++i) |
| 51 | { |
| 52 | if (mask & 1) |
| 53 | { |
| 54 | if (sep) |
| 55 | *cp++ = ','; |
| 56 | *cp++ = 'b'; |
| 57 | *cp++ = i + 1 + '0'; |
| 58 | sep = 1; |
| 59 | } |
| 60 | mask >>= 1; |
| 61 | } |
| 62 | *cp = '\0'; |
| 63 | } |
| 64 | |
| 65 | static void |
| 66 | unw_print_grmask (cp, mask) |
| 67 | char * cp; |
| 68 | unsigned int mask; |
| 69 | { |
| 70 | int sep = 0; |
| 71 | int i; |
| 72 | |
| 73 | for (i = 0; i < 4; ++i) |
| 74 | { |
| 75 | if (mask & 1) |
| 76 | { |
| 77 | if (sep) |
| 78 | *cp++ = ','; |
| 79 | *cp++ = 'r'; |
| 80 | *cp++ = i + 4 + '0'; |
| 81 | sep = 1; |
| 82 | } |
| 83 | mask >>= 1; |
| 84 | } |
| 85 | *cp = '\0'; |
| 86 | } |
| 87 | |
| 88 | static void |
| 89 | unw_print_frmask (cp, mask) |
| 90 | char * cp; |
| 91 | unsigned int mask; |
| 92 | { |
| 93 | int sep = 0; |
| 94 | int i; |
| 95 | |
| 96 | for (i = 0; i < 20; ++i) |
| 97 | { |
| 98 | if (mask & 1) |
| 99 | { |
| 100 | if (sep) |
| 101 | *cp++ = ','; |
| 102 | *cp++ = 'f'; |
| 103 | if (i < 4) |
| 104 | *cp++ = i + 2 + '0'; |
| 105 | else |
| 106 | { |
| 107 | *cp++ = (i + 2) / 10 + 1 + '0'; |
| 108 | *cp++ = (i + 2) % 10 + '0'; |
| 109 | } |
| 110 | sep = 1; |
| 111 | } |
| 112 | mask >>= 1; |
| 113 | } |
| 114 | *cp = '\0'; |
| 115 | } |
| 116 | |
| 117 | static void |
| 118 | unw_print_abreg (cp, abreg) |
| 119 | char * cp; |
| 120 | unsigned int abreg; |
| 121 | { |
| 122 | static const char *special_reg[16] = |
| 123 | { |
| 124 | "pr", "psp", "@priunat", "rp", "ar.bsp", "ar.bspstore", "ar.rnat", |
| 125 | "ar.unat", "ar.fpsr", "ar.pfs", "ar.lc", |
| 126 | "Unknown11", "Unknown12", "Unknown13", "Unknown14", "Unknown15" |
| 127 | }; |
| 128 | |
| 129 | switch ((abreg >> 5) & 0x3) |
| 130 | { |
| 131 | case 0: /* gr */ |
| 132 | sprintf (cp, "r%u", (abreg & 0x1f)); |
| 133 | break; |
| 134 | |
| 135 | case 1: /* fr */ |
| 136 | sprintf (cp, "f%u", (abreg & 0x1f)); |
| 137 | break; |
| 138 | |
| 139 | case 2: /* br */ |
| 140 | sprintf (cp, "b%u", (abreg & 0x1f)); |
| 141 | break; |
| 142 | |
| 143 | case 3: /* special */ |
| 144 | strcpy (cp, special_reg[abreg & 0xf]); |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | static void |
| 150 | unw_print_xyreg (cp, x, ytreg) |
| 151 | char * cp; |
| 152 | unsigned int x; |
| 153 | unsigned int ytreg; |
| 154 | { |
| 155 | switch ((x << 1) | ((ytreg >> 7) & 1)) |
| 156 | { |
| 157 | case 0: /* gr */ |
| 158 | sprintf (cp, "r%u", (ytreg & 0x1f)); |
| 159 | break; |
| 160 | |
| 161 | case 1: /* fr */ |
| 162 | sprintf (cp, "f%u", (ytreg & 0x1f)); |
| 163 | break; |
| 164 | |
| 165 | case 2: /* br */ |
| 166 | sprintf (cp, "b%u", (ytreg & 0x1f)); |
| 167 | break; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | #define UNW_REG_BSP "bsp" |
| 172 | #define UNW_REG_BSPSTORE "bspstore" |
| 173 | #define UNW_REG_FPSR "fpsr" |
| 174 | #define UNW_REG_LC "lc" |
| 175 | #define UNW_REG_PFS "pfs" |
| 176 | #define UNW_REG_PR "pr" |
| 177 | #define UNW_REG_PSP "psp" |
| 178 | #define UNW_REG_RNAT "rnat" |
| 179 | #define UNW_REG_RP "rp" |
| 180 | #define UNW_REG_UNAT "unat" |
| 181 | |
| 182 | typedef bfd_vma unw_word; |
| 183 | |
| 184 | #define UNW_DEC_BAD_CODE(code) \ |
| 185 | printf ("Unknown code 0x%02x\n", code) |
| 186 | |
| 187 | #define UNW_DEC_PROLOGUE(fmt, body, rlen, arg) \ |
| 188 | do \ |
| 189 | { \ |
| 190 | unw_rlen = rlen; \ |
| 191 | *(int *)arg = body; \ |
| 192 | printf (" %s:%s(rlen=%lu)\n", \ |
| 193 | fmt, body ? "body" : "prologue", (unsigned long) rlen); \ |
| 194 | } \ |
| 195 | while (0) |
| 196 | |
| 197 | #define UNW_DEC_PROLOGUE_GR(fmt, rlen, mask, grsave, arg) \ |
| 198 | do \ |
| 199 | { \ |
| 200 | char regname[16], maskstr[64], *sep; \ |
| 201 | \ |
| 202 | unw_rlen = rlen; \ |
| 203 | *(int *)arg = 0; \ |
| 204 | \ |
| 205 | maskstr[0] = '\0'; \ |
| 206 | sep = ""; \ |
| 207 | if (mask & 0x8) \ |
| 208 | { \ |
| 209 | strcat (maskstr, "rp"); \ |
| 210 | sep = ","; \ |
| 211 | } \ |
| 212 | if (mask & 0x4) \ |
| 213 | { \ |
| 214 | strcat (maskstr, sep); \ |
| 215 | strcat (maskstr, "ar.pfs"); \ |
| 216 | sep = ","; \ |
| 217 | } \ |
| 218 | if (mask & 0x2) \ |
| 219 | { \ |
| 220 | strcat (maskstr, sep); \ |
| 221 | strcat (maskstr, "psp"); \ |
| 222 | sep = ","; \ |
| 223 | } \ |
| 224 | if (mask & 0x1) \ |
| 225 | { \ |
| 226 | strcat (maskstr, sep); \ |
| 227 | strcat (maskstr, "pr"); \ |
| 228 | } \ |
| 229 | sprintf (regname, "r%u", grsave); \ |
| 230 | printf (" %s:prologue_gr(mask=[%s],grsave=%s,rlen=%lu)\n", \ |
| 231 | fmt, maskstr, regname, (unsigned long) rlen); \ |
| 232 | } \ |
| 233 | while (0) |
| 234 | |
| 235 | #define UNW_DEC_FR_MEM(fmt, frmask, arg) \ |
| 236 | do \ |
| 237 | { \ |
| 238 | char frstr[200]; \ |
| 239 | \ |
| 240 | unw_print_frmask (frstr, frmask); \ |
| 241 | printf ("\t%s:fr_mem(frmask=[%s])\n", fmt, frstr); \ |
| 242 | } \ |
| 243 | while (0) |
| 244 | |
| 245 | #define UNW_DEC_GR_MEM(fmt, grmask, arg) \ |
| 246 | do \ |
| 247 | { \ |
| 248 | char grstr[200]; \ |
| 249 | \ |
| 250 | unw_print_grmask (grstr, grmask); \ |
| 251 | printf ("\t%s:gr_mem(grmask=[%s])\n", fmt, grstr); \ |
| 252 | } \ |
| 253 | while (0) |
| 254 | |
| 255 | #define UNW_DEC_FRGR_MEM(fmt, grmask, frmask, arg) \ |
| 256 | do \ |
| 257 | { \ |
| 258 | char frstr[200], grstr[20]; \ |
| 259 | \ |
| 260 | unw_print_grmask (grstr, grmask); \ |
| 261 | unw_print_frmask (frstr, frmask); \ |
| 262 | printf ("\t%s:frgr_mem(grmask=[%s],frmask=[%s])\n", fmt, grstr, frstr); \ |
| 263 | } \ |
| 264 | while (0) |
| 265 | |
| 266 | #define UNW_DEC_BR_MEM(fmt, brmask, arg) \ |
| 267 | do \ |
| 268 | { \ |
| 269 | char brstr[20]; \ |
| 270 | \ |
| 271 | unw_print_brmask (brstr, brmask); \ |
| 272 | printf ("\t%s:br_mem(brmask=[%s])\n", fmt, brstr); \ |
| 273 | } \ |
| 274 | while (0) |
| 275 | |
| 276 | #define UNW_DEC_BR_GR(fmt, brmask, gr, arg) \ |
| 277 | do \ |
| 278 | { \ |
| 279 | char brstr[20]; \ |
| 280 | \ |
| 281 | unw_print_brmask (brstr, brmask); \ |
| 282 | printf ("\t%s:br_gr(brmask=[%s],gr=r%u)\n", fmt, brstr, gr); \ |
| 283 | } \ |
| 284 | while (0) |
| 285 | |
| 286 | #define UNW_DEC_REG_GR(fmt, src, dst, arg) \ |
| 287 | printf ("\t%s:%s_gr(reg=r%u)\n", fmt, src, dst) |
| 288 | |
| 289 | #define UNW_DEC_RP_BR(fmt, dst, arg) \ |
| 290 | printf ("\t%s:rp_br(reg=b%u)\n", fmt, dst) |
| 291 | |
| 292 | #define UNW_DEC_REG_WHEN(fmt, reg, t, arg) \ |
| 293 | printf ("\t%s:%s_when(t=%lu)\n", fmt, reg, (unsigned long) t) |
| 294 | |
| 295 | #define UNW_DEC_REG_SPREL(fmt, reg, spoff, arg) \ |
| 296 | printf ("\t%s:%s_sprel(spoff=0x%lx)\n", \ |
| 297 | fmt, reg, 4*(unsigned long)spoff) |
| 298 | |
| 299 | #define UNW_DEC_REG_PSPREL(fmt, reg, pspoff, arg) \ |
| 300 | printf ("\t%s:%s_psprel(pspoff=0x10-0x%lx)\n", \ |
| 301 | fmt, reg, 4*(unsigned long)pspoff) |
| 302 | |
| 303 | #define UNW_DEC_GR_GR(fmt, grmask, gr, arg) \ |
| 304 | do \ |
| 305 | { \ |
| 306 | char grstr[20]; \ |
| 307 | \ |
| 308 | unw_print_grmask (grstr, grmask); \ |
| 309 | printf ("\t%s:gr_gr(grmask=[%s],r%u)\n", fmt, grstr, gr); \ |
| 310 | } \ |
| 311 | while (0) |
| 312 | |
| 313 | #define UNW_DEC_ABI(fmt, abi, context, arg) \ |
| 314 | do \ |
| 315 | { \ |
| 316 | static const char *abiname[] = \ |
| 317 | { \ |
| 318 | "@svr4", "@hpux", "@nt" \ |
| 319 | }; \ |
| 320 | char buf[20]; \ |
| 321 | const char *abistr = buf; \ |
| 322 | \ |
| 323 | if (abi < 3) \ |
| 324 | abistr = abiname[abi]; \ |
| 325 | else \ |
| 326 | sprintf (buf, "0x%x", abi); \ |
| 327 | printf ("\t%s:unwabi(abi=%s,context=0x%02x)\n", \ |
| 328 | fmt, abistr, context); \ |
| 329 | } \ |
| 330 | while (0) |
| 331 | |
| 332 | #define UNW_DEC_PRIUNAT_GR(fmt, r, arg) \ |
| 333 | printf ("\t%s:priunat_gr(reg=r%u)\n", fmt, r) |
| 334 | |
| 335 | #define UNW_DEC_PRIUNAT_WHEN_GR(fmt, t, arg) \ |
| 336 | printf ("\t%s:priunat_when_gr(t=%lu)\n", fmt, (unsigned long) t) |
| 337 | |
| 338 | #define UNW_DEC_PRIUNAT_WHEN_MEM(fmt, t, arg) \ |
| 339 | printf ("\t%s:priunat_when_mem(t=%lu)\n", fmt, (unsigned long) t) |
| 340 | |
| 341 | #define UNW_DEC_PRIUNAT_PSPREL(fmt, pspoff, arg) \ |
| 342 | printf ("\t%s:priunat_psprel(pspoff=0x10-0x%lx)\n", \ |
| 343 | fmt, 4*(unsigned long)pspoff) |
| 344 | |
| 345 | #define UNW_DEC_PRIUNAT_SPREL(fmt, spoff, arg) \ |
| 346 | printf ("\t%s:priunat_sprel(spoff=0x%lx)\n", \ |
| 347 | fmt, 4*(unsigned long)spoff) |
| 348 | |
| 349 | #define UNW_DEC_MEM_STACK_F(fmt, t, size, arg) \ |
| 350 | printf ("\t%s:mem_stack_f(t=%lu,size=%lu)\n", \ |
| 351 | fmt, (unsigned long) t, 16*(unsigned long)size) |
| 352 | |
| 353 | #define UNW_DEC_MEM_STACK_V(fmt, t, arg) \ |
| 354 | printf ("\t%s:mem_stack_v(t=%lu)\n", fmt, (unsigned long) t) |
| 355 | |
| 356 | #define UNW_DEC_SPILL_BASE(fmt, pspoff, arg) \ |
| 357 | printf ("\t%s:spill_base(pspoff=0x10-0x%lx)\n", \ |
| 358 | fmt, 4*(unsigned long)pspoff) |
| 359 | |
| 360 | #define UNW_DEC_SPILL_MASK(fmt, dp, arg) \ |
| 361 | do \ |
| 362 | { \ |
| 363 | static const char * spill_type = "-frb"; \ |
| 364 | unsigned const char * imaskp = dp; \ |
| 365 | unsigned char mask = 0; \ |
| 366 | bfd_vma insn = 0; \ |
| 367 | \ |
| 368 | printf ("\t%s:spill_mask(imask=[", fmt); \ |
| 369 | for (insn = 0; insn < unw_rlen; ++insn) \ |
| 370 | { \ |
| 371 | if ((insn % 4) == 0) \ |
| 372 | mask = *imaskp++; \ |
| 373 | if (insn > 0 && (insn % 3) == 0) \ |
| 374 | putchar (','); \ |
| 375 | putchar (spill_type[(mask >> (2 * (3 - (insn & 0x3)))) & 0x3]); \ |
| 376 | } \ |
| 377 | printf ("])\n"); \ |
| 378 | dp = imaskp; \ |
| 379 | } \ |
| 380 | while (0) |
| 381 | |
| 382 | #define UNW_DEC_SPILL_SPREL(fmt, t, abreg, spoff, arg) \ |
| 383 | do \ |
| 384 | { \ |
| 385 | char regname[10]; \ |
| 386 | \ |
| 387 | unw_print_abreg (regname, abreg); \ |
| 388 | printf ("\t%s:spill_sprel(reg=%s,t=%lu,spoff=0x%lx)\n", \ |
| 389 | fmt, regname, (unsigned long) t, 4*(unsigned long)off); \ |
| 390 | } \ |
| 391 | while (0) |
| 392 | |
| 393 | #define UNW_DEC_SPILL_PSPREL(fmt, t, abreg, pspoff, arg) \ |
| 394 | do \ |
| 395 | { \ |
| 396 | char regname[10]; \ |
| 397 | \ |
| 398 | unw_print_abreg (regname, abreg); \ |
| 399 | printf ("\t%s:spill_psprel(reg=%s,t=%lu,pspoff=0x10-0x%lx)\n", \ |
| 400 | fmt, regname, (unsigned long) t, 4*(unsigned long)pspoff); \ |
| 401 | } \ |
| 402 | while (0) |
| 403 | |
| 404 | #define UNW_DEC_RESTORE(fmt, t, abreg, arg) \ |
| 405 | do \ |
| 406 | { \ |
| 407 | char regname[10]; \ |
| 408 | \ |
| 409 | unw_print_abreg (regname, abreg); \ |
| 410 | printf ("\t%s:restore(t=%lu,reg=%s)\n", \ |
| 411 | fmt, (unsigned long) t, regname); \ |
| 412 | } \ |
| 413 | while (0) |
| 414 | |
| 415 | #define UNW_DEC_SPILL_REG(fmt, t, abreg, x, ytreg, arg) \ |
| 416 | do \ |
| 417 | { \ |
| 418 | char abregname[10], tregname[10]; \ |
| 419 | \ |
| 420 | unw_print_abreg (abregname, abreg); \ |
| 421 | unw_print_xyreg (tregname, x, ytreg); \ |
| 422 | printf ("\t%s:spill_reg(t=%lu,reg=%s,treg=%s)\n", \ |
| 423 | fmt, (unsigned long) t, abregname, tregname); \ |
| 424 | } \ |
| 425 | while (0) |
| 426 | |
| 427 | #define UNW_DEC_SPILL_SPREL_P(fmt, qp, t, abreg, spoff, arg) \ |
| 428 | do \ |
| 429 | { \ |
| 430 | char regname[20]; \ |
| 431 | \ |
| 432 | unw_print_abreg (regname, abreg); \ |
| 433 | printf ("\t%s:spill_sprel_p(qp=p%u,t=%lu,reg=%s,spoff=0x%lx)\n", \ |
| 434 | fmt, qp, (unsigned long) t, regname, 4 * (unsigned long)spoff); \ |
| 435 | } \ |
| 436 | while (0) |
| 437 | |
| 438 | #define UNW_DEC_SPILL_PSPREL_P(fmt, qp, t, abreg, pspoff, arg) \ |
| 439 | do \ |
| 440 | { \ |
| 441 | char regname[20]; \ |
| 442 | \ |
| 443 | unw_print_abreg (regname, abreg); \ |
| 444 | printf ("\t%s:spill_psprel_p(qp=p%u,t=%lu,reg=%s,pspoff=0x10-0x%lx)\n",\ |
| 445 | fmt, qp, (unsigned long) t, regname, 4*(unsigned long)pspoff);\ |
| 446 | } \ |
| 447 | while (0) |
| 448 | |
| 449 | #define UNW_DEC_RESTORE_P(fmt, qp, t, abreg, arg) \ |
| 450 | do \ |
| 451 | { \ |
| 452 | char regname[20]; \ |
| 453 | \ |
| 454 | unw_print_abreg (regname, abreg); \ |
| 455 | printf ("\t%s:restore_p(qp=p%u,t=%lu,reg=%s)\n", \ |
| 456 | fmt, qp, (unsigned long) t, regname); \ |
| 457 | } \ |
| 458 | while (0) |
| 459 | |
| 460 | #define UNW_DEC_SPILL_REG_P(fmt, qp, t, abreg, x, ytreg, arg) \ |
| 461 | do \ |
| 462 | { \ |
| 463 | char regname[20], tregname[20]; \ |
| 464 | \ |
| 465 | unw_print_abreg (regname, abreg); \ |
| 466 | unw_print_xyreg (tregname, x, ytreg); \ |
| 467 | printf ("\t%s:spill_reg_p(qp=p%u,t=%lu,reg=%s,treg=%s)\n", \ |
| 468 | fmt, qp, (unsigned long) t, regname, tregname); \ |
| 469 | } \ |
| 470 | while (0) |
| 471 | |
| 472 | #define UNW_DEC_LABEL_STATE(fmt, label, arg) \ |
| 473 | printf ("\t%s:label_state(label=%lu)\n", fmt, (unsigned long) label) |
| 474 | |
| 475 | #define UNW_DEC_COPY_STATE(fmt, label, arg) \ |
| 476 | printf ("\t%s:copy_state(label=%lu)\n", fmt, (unsigned long) label) |
| 477 | |
| 478 | #define UNW_DEC_EPILOGUE(fmt, t, ecount, arg) \ |
| 479 | printf ("\t%s:epilogue(t=%lu,ecount=%lu)\n", \ |
| 480 | fmt, (unsigned long) t, (unsigned long) ecount) |
| 481 | |
| 482 | /* |
| 483 | * Generic IA-64 unwind info decoder. |
| 484 | * |
| 485 | * This file is used both by the Linux kernel and objdump. Please |
| 486 | * keep the two copies of this file in sync (modulo differences in the |
| 487 | * prototypes...). |
| 488 | * |
| 489 | * You need to customize the decoder by defining the following |
| 490 | * macros/constants before including this file: |
| 491 | * |
| 492 | * Types: |
| 493 | * unw_word Unsigned integer type with at least 64 bits |
| 494 | * |
| 495 | * Register names: |
| 496 | * UNW_REG_BSP |
| 497 | * UNW_REG_BSPSTORE |
| 498 | * UNW_REG_FPSR |
| 499 | * UNW_REG_LC |
| 500 | * UNW_REG_PFS |
| 501 | * UNW_REG_PR |
| 502 | * UNW_REG_RNAT |
| 503 | * UNW_REG_PSP |
| 504 | * UNW_REG_RP |
| 505 | * UNW_REG_UNAT |
| 506 | * |
| 507 | * Decoder action macros: |
| 508 | * UNW_DEC_BAD_CODE(code) |
| 509 | * UNW_DEC_ABI(fmt,abi,context,arg) |
| 510 | * UNW_DEC_BR_GR(fmt,brmask,gr,arg) |
| 511 | * UNW_DEC_BR_MEM(fmt,brmask,arg) |
| 512 | * UNW_DEC_COPY_STATE(fmt,label,arg) |
| 513 | * UNW_DEC_EPILOGUE(fmt,t,ecount,arg) |
| 514 | * UNW_DEC_FRGR_MEM(fmt,grmask,frmask,arg) |
| 515 | * UNW_DEC_FR_MEM(fmt,frmask,arg) |
| 516 | * UNW_DEC_GR_GR(fmt,grmask,gr,arg) |
| 517 | * UNW_DEC_GR_MEM(fmt,grmask,arg) |
| 518 | * UNW_DEC_LABEL_STATE(fmt,label,arg) |
| 519 | * UNW_DEC_MEM_STACK_F(fmt,t,size,arg) |
| 520 | * UNW_DEC_MEM_STACK_V(fmt,t,arg) |
| 521 | * UNW_DEC_PRIUNAT_GR(fmt,r,arg) |
| 522 | * UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg) |
| 523 | * UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg) |
| 524 | * UNW_DEC_PRIUNAT_WHEN_PSPREL(fmt,pspoff,arg) |
| 525 | * UNW_DEC_PRIUNAT_WHEN_SPREL(fmt,spoff,arg) |
| 526 | * UNW_DEC_PROLOGUE(fmt,body,rlen,arg) |
| 527 | * UNW_DEC_PROLOGUE_GR(fmt,rlen,mask,grsave,arg) |
| 528 | * UNW_DEC_REG_PSPREL(fmt,reg,pspoff,arg) |
| 529 | * UNW_DEC_REG_REG(fmt,src,dst,arg) |
| 530 | * UNW_DEC_REG_SPREL(fmt,reg,spoff,arg) |
| 531 | * UNW_DEC_REG_WHEN(fmt,reg,t,arg) |
| 532 | * UNW_DEC_RESTORE(fmt,t,abreg,arg) |
| 533 | * UNW_DEC_RESTORE_P(fmt,qp,t,abreg,arg) |
| 534 | * UNW_DEC_SPILL_BASE(fmt,pspoff,arg) |
| 535 | * UNW_DEC_SPILL_MASK(fmt,imaskp,arg) |
| 536 | * UNW_DEC_SPILL_PSPREL(fmt,t,abreg,pspoff,arg) |
| 537 | * UNW_DEC_SPILL_PSPREL_P(fmt,qp,t,abreg,pspoff,arg) |
| 538 | * UNW_DEC_SPILL_REG(fmt,t,abreg,x,ytreg,arg) |
| 539 | * UNW_DEC_SPILL_REG_P(fmt,qp,t,abreg,x,ytreg,arg) |
| 540 | * UNW_DEC_SPILL_SPREL(fmt,t,abreg,spoff,arg) |
| 541 | * UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg) |
| 542 | */ |
| 543 | |
| 544 | static unw_word unw_decode_uleb128 PARAMS ((const unsigned char **)); |
| 545 | static const unsigned char *unw_decode_x1 PARAMS ((const unsigned char *, |
| 546 | unsigned int, void *)); |
| 547 | static const unsigned char *unw_decode_x2 PARAMS ((const unsigned char *, |
| 548 | unsigned int, void *)); |
| 549 | static const unsigned char *unw_decode_x3 PARAMS ((const unsigned char *, |
| 550 | unsigned int, void *)); |
| 551 | static const unsigned char *unw_decode_x4 PARAMS ((const unsigned char *, |
| 552 | unsigned int, void *)); |
| 553 | static const unsigned char *unw_decode_r1 PARAMS ((const unsigned char *, |
| 554 | unsigned int, void *)); |
| 555 | static const unsigned char *unw_decode_r2 PARAMS ((const unsigned char *, |
| 556 | unsigned int, void *)); |
| 557 | static const unsigned char *unw_decode_r3 PARAMS ((const unsigned char *, |
| 558 | unsigned int, void *)); |
| 559 | static const unsigned char *unw_decode_p1 PARAMS ((const unsigned char *, |
| 560 | unsigned int, void *)); |
| 561 | static const unsigned char *unw_decode_p2_p5 PARAMS ((const unsigned char *, |
| 562 | unsigned int, void *)); |
| 563 | static const unsigned char *unw_decode_p6 PARAMS ((const unsigned char *, |
| 564 | unsigned int, void *)); |
| 565 | static const unsigned char *unw_decode_p7_p10 PARAMS ((const unsigned char *, |
| 566 | unsigned int, void *)); |
| 567 | static const unsigned char *unw_decode_b1 PARAMS ((const unsigned char *, |
| 568 | unsigned int, void *)); |
| 569 | static const unsigned char *unw_decode_b2 PARAMS ((const unsigned char *, |
| 570 | unsigned int, void *)); |
| 571 | static const unsigned char *unw_decode_b3_x4 PARAMS ((const unsigned char *, |
| 572 | unsigned int, void *)); |
| 573 | |
| 574 | static unw_word |
| 575 | unw_decode_uleb128 (dpp) |
| 576 | const unsigned char **dpp; |
| 577 | { |
| 578 | unsigned shift = 0; |
| 579 | unw_word byte, result = 0; |
| 580 | const unsigned char *bp = *dpp; |
| 581 | |
| 582 | while (1) |
| 583 | { |
| 584 | byte = *bp++; |
| 585 | result |= (byte & 0x7f) << shift; |
| 586 | |
| 587 | if ((byte & 0x80) == 0) |
| 588 | break; |
| 589 | |
| 590 | shift += 7; |
| 591 | } |
| 592 | |
| 593 | *dpp = bp; |
| 594 | |
| 595 | return result; |
| 596 | } |
| 597 | |
| 598 | static const unsigned char * |
| 599 | unw_decode_x1 (dp, code, arg) |
| 600 | const unsigned char * dp; |
| 601 | unsigned int code ATTRIBUTE_UNUSED; |
| 602 | void * arg ATTRIBUTE_UNUSED; |
| 603 | { |
| 604 | unsigned char byte1, abreg; |
| 605 | unw_word t, off; |
| 606 | |
| 607 | byte1 = *dp++; |
| 608 | t = unw_decode_uleb128 (&dp); |
| 609 | off = unw_decode_uleb128 (&dp); |
| 610 | abreg = (byte1 & 0x7f); |
| 611 | if (byte1 & 0x80) |
| 612 | UNW_DEC_SPILL_SPREL ("X1", t, abreg, off, arg); |
| 613 | else |
| 614 | UNW_DEC_SPILL_PSPREL ("X1", t, abreg, off, arg); |
| 615 | return dp; |
| 616 | } |
| 617 | |
| 618 | static const unsigned char * |
| 619 | unw_decode_x2 (dp, code, arg) |
| 620 | const unsigned char * dp; |
| 621 | unsigned int code ATTRIBUTE_UNUSED; |
| 622 | void * arg ATTRIBUTE_UNUSED; |
| 623 | { |
| 624 | unsigned char byte1, byte2, abreg, x, ytreg; |
| 625 | unw_word t; |
| 626 | |
| 627 | byte1 = *dp++; |
| 628 | byte2 = *dp++; |
| 629 | t = unw_decode_uleb128 (&dp); |
| 630 | abreg = (byte1 & 0x7f); |
| 631 | ytreg = byte2; |
| 632 | x = (byte1 >> 7) & 1; |
| 633 | if ((byte1 & 0x80) == 0 && ytreg == 0) |
| 634 | UNW_DEC_RESTORE ("X2", t, abreg, arg); |
| 635 | else |
| 636 | UNW_DEC_SPILL_REG ("X2", t, abreg, x, ytreg, arg); |
| 637 | return dp; |
| 638 | } |
| 639 | |
| 640 | static const unsigned char * |
| 641 | unw_decode_x3 (dp, code, arg) |
| 642 | const unsigned char * dp; |
| 643 | unsigned int code ATTRIBUTE_UNUSED; |
| 644 | void * arg ATTRIBUTE_UNUSED; |
| 645 | { |
| 646 | unsigned char byte1, byte2, abreg, qp; |
| 647 | unw_word t, off; |
| 648 | |
| 649 | byte1 = *dp++; |
| 650 | byte2 = *dp++; |
| 651 | t = unw_decode_uleb128 (&dp); |
| 652 | off = unw_decode_uleb128 (&dp); |
| 653 | |
| 654 | qp = (byte1 & 0x3f); |
| 655 | abreg = (byte2 & 0x7f); |
| 656 | |
| 657 | if (byte1 & 0x80) |
| 658 | UNW_DEC_SPILL_SPREL_P ("X3", qp, t, abreg, off, arg); |
| 659 | else |
| 660 | UNW_DEC_SPILL_PSPREL_P ("X3", qp, t, abreg, off, arg); |
| 661 | return dp; |
| 662 | } |
| 663 | |
| 664 | static const unsigned char * |
| 665 | unw_decode_x4 (dp, code, arg) |
| 666 | const unsigned char * dp; |
| 667 | unsigned int code ATTRIBUTE_UNUSED; |
| 668 | void * arg ATTRIBUTE_UNUSED; |
| 669 | { |
| 670 | unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg; |
| 671 | unw_word t; |
| 672 | |
| 673 | byte1 = *dp++; |
| 674 | byte2 = *dp++; |
| 675 | byte3 = *dp++; |
| 676 | t = unw_decode_uleb128 (&dp); |
| 677 | |
| 678 | qp = (byte1 & 0x3f); |
| 679 | abreg = (byte2 & 0x7f); |
| 680 | x = (byte2 >> 7) & 1; |
| 681 | ytreg = byte3; |
| 682 | |
| 683 | if ((byte2 & 0x80) == 0 && byte3 == 0) |
| 684 | UNW_DEC_RESTORE_P ("X4", qp, t, abreg, arg); |
| 685 | else |
| 686 | UNW_DEC_SPILL_REG_P ("X4", qp, t, abreg, x, ytreg, arg); |
| 687 | return dp; |
| 688 | } |
| 689 | |
| 690 | static const unsigned char * |
| 691 | unw_decode_r1 (dp, code, arg) |
| 692 | const unsigned char *dp; |
| 693 | unsigned int code; |
| 694 | void *arg; |
| 695 | { |
| 696 | int body = (code & 0x20) != 0; |
| 697 | unw_word rlen; |
| 698 | |
| 699 | rlen = (code & 0x1f); |
| 700 | UNW_DEC_PROLOGUE ("R1", body, rlen, arg); |
| 701 | return dp; |
| 702 | } |
| 703 | |
| 704 | static const unsigned char * |
| 705 | unw_decode_r2 (dp, code, arg) |
| 706 | const unsigned char *dp; |
| 707 | unsigned int code; |
| 708 | void *arg; |
| 709 | { |
| 710 | unsigned char byte1, mask, grsave; |
| 711 | unw_word rlen; |
| 712 | |
| 713 | byte1 = *dp++; |
| 714 | |
| 715 | mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); |
| 716 | grsave = (byte1 & 0x7f); |
| 717 | rlen = unw_decode_uleb128 (& dp); |
| 718 | UNW_DEC_PROLOGUE_GR ("R2", rlen, mask, grsave, arg); |
| 719 | return dp; |
| 720 | } |
| 721 | |
| 722 | static const unsigned char * |
| 723 | unw_decode_r3 (dp, code, arg) |
| 724 | const unsigned char *dp; |
| 725 | unsigned int code; |
| 726 | void *arg; |
| 727 | { |
| 728 | unw_word rlen; |
| 729 | |
| 730 | rlen = unw_decode_uleb128 (& dp); |
| 731 | UNW_DEC_PROLOGUE ("R3", ((code & 0x3) == 1), rlen, arg); |
| 732 | return dp; |
| 733 | } |
| 734 | |
| 735 | static const unsigned char * |
| 736 | unw_decode_p1 (dp, code, arg) |
| 737 | const unsigned char * dp; |
| 738 | unsigned int code; |
| 739 | void * arg ATTRIBUTE_UNUSED; |
| 740 | { |
| 741 | unsigned char brmask = (code & 0x1f); |
| 742 | |
| 743 | UNW_DEC_BR_MEM ("P1", brmask, arg); |
| 744 | return dp; |
| 745 | } |
| 746 | |
| 747 | static const unsigned char * |
| 748 | unw_decode_p2_p5 (dp, code, arg) |
| 749 | const unsigned char * dp; |
| 750 | unsigned int code; |
| 751 | void * arg ATTRIBUTE_UNUSED; |
| 752 | { |
| 753 | if ((code & 0x10) == 0) |
| 754 | { |
| 755 | unsigned char byte1 = *dp++; |
| 756 | |
| 757 | UNW_DEC_BR_GR ("P2", ((code & 0xf) << 1) | ((byte1 >> 7) & 1), |
| 758 | (byte1 & 0x7f), arg); |
| 759 | } |
| 760 | else if ((code & 0x08) == 0) |
| 761 | { |
| 762 | unsigned char byte1 = *dp++, r, dst; |
| 763 | |
| 764 | r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); |
| 765 | dst = (byte1 & 0x7f); |
| 766 | switch (r) |
| 767 | { |
| 768 | case 0: |
| 769 | UNW_DEC_REG_GR ("P3", UNW_REG_PSP, dst, arg); |
| 770 | break; |
| 771 | case 1: |
| 772 | UNW_DEC_REG_GR ("P3", UNW_REG_RP, dst, arg); |
| 773 | break; |
| 774 | case 2: |
| 775 | UNW_DEC_REG_GR ("P3", UNW_REG_PFS, dst, arg); |
| 776 | break; |
| 777 | case 3: |
| 778 | UNW_DEC_REG_GR ("P3", UNW_REG_PR, dst, arg); |
| 779 | break; |
| 780 | case 4: |
| 781 | UNW_DEC_REG_GR ("P3", UNW_REG_UNAT, dst, arg); |
| 782 | break; |
| 783 | case 5: |
| 784 | UNW_DEC_REG_GR ("P3", UNW_REG_LC, dst, arg); |
| 785 | break; |
| 786 | case 6: |
| 787 | UNW_DEC_RP_BR ("P3", dst, arg); |
| 788 | break; |
| 789 | case 7: |
| 790 | UNW_DEC_REG_GR ("P3", UNW_REG_RNAT, dst, arg); |
| 791 | break; |
| 792 | case 8: |
| 793 | UNW_DEC_REG_GR ("P3", UNW_REG_BSP, dst, arg); |
| 794 | break; |
| 795 | case 9: |
| 796 | UNW_DEC_REG_GR ("P3", UNW_REG_BSPSTORE, dst, arg); |
| 797 | break; |
| 798 | case 10: |
| 799 | UNW_DEC_REG_GR ("P3", UNW_REG_FPSR, dst, arg); |
| 800 | break; |
| 801 | case 11: |
| 802 | UNW_DEC_PRIUNAT_GR ("P3", dst, arg); |
| 803 | break; |
| 804 | default: |
| 805 | UNW_DEC_BAD_CODE (r); |
| 806 | break; |
| 807 | } |
| 808 | } |
| 809 | else if ((code & 0x7) == 0) |
| 810 | UNW_DEC_SPILL_MASK ("P4", dp, arg); |
| 811 | else if ((code & 0x7) == 1) |
| 812 | { |
| 813 | unw_word grmask, frmask, byte1, byte2, byte3; |
| 814 | |
| 815 | byte1 = *dp++; |
| 816 | byte2 = *dp++; |
| 817 | byte3 = *dp++; |
| 818 | grmask = ((byte1 >> 4) & 0xf); |
| 819 | frmask = ((byte1 & 0xf) << 16) | (byte2 << 8) | byte3; |
| 820 | UNW_DEC_FRGR_MEM ("P5", grmask, frmask, arg); |
| 821 | } |
| 822 | else |
| 823 | UNW_DEC_BAD_CODE (code); |
| 824 | |
| 825 | return dp; |
| 826 | } |
| 827 | |
| 828 | static const unsigned char * |
| 829 | unw_decode_p6 (dp, code, arg) |
| 830 | const unsigned char * dp; |
| 831 | unsigned int code; |
| 832 | void * arg ATTRIBUTE_UNUSED; |
| 833 | { |
| 834 | int gregs = (code & 0x10) != 0; |
| 835 | unsigned char mask = (code & 0x0f); |
| 836 | |
| 837 | if (gregs) |
| 838 | UNW_DEC_GR_MEM ("P6", mask, arg); |
| 839 | else |
| 840 | UNW_DEC_FR_MEM ("P6", mask, arg); |
| 841 | return dp; |
| 842 | } |
| 843 | |
| 844 | static const unsigned char * |
| 845 | unw_decode_p7_p10 (dp, code, arg) |
| 846 | const unsigned char *dp; |
| 847 | unsigned int code; |
| 848 | void *arg; |
| 849 | { |
| 850 | unsigned char r, byte1, byte2; |
| 851 | unw_word t, size; |
| 852 | |
| 853 | if ((code & 0x10) == 0) |
| 854 | { |
| 855 | r = (code & 0xf); |
| 856 | t = unw_decode_uleb128 (&dp); |
| 857 | switch (r) |
| 858 | { |
| 859 | case 0: |
| 860 | size = unw_decode_uleb128 (&dp); |
| 861 | UNW_DEC_MEM_STACK_F ("P7", t, size, arg); |
| 862 | break; |
| 863 | |
| 864 | case 1: |
| 865 | UNW_DEC_MEM_STACK_V ("P7", t, arg); |
| 866 | break; |
| 867 | case 2: |
| 868 | UNW_DEC_SPILL_BASE ("P7", t, arg); |
| 869 | break; |
| 870 | case 3: |
| 871 | UNW_DEC_REG_SPREL ("P7", UNW_REG_PSP, t, arg); |
| 872 | break; |
| 873 | case 4: |
| 874 | UNW_DEC_REG_WHEN ("P7", UNW_REG_RP, t, arg); |
| 875 | break; |
| 876 | case 5: |
| 877 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_RP, t, arg); |
| 878 | break; |
| 879 | case 6: |
| 880 | UNW_DEC_REG_WHEN ("P7", UNW_REG_PFS, t, arg); |
| 881 | break; |
| 882 | case 7: |
| 883 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_PFS, t, arg); |
| 884 | break; |
| 885 | case 8: |
| 886 | UNW_DEC_REG_WHEN ("P7", UNW_REG_PR, t, arg); |
| 887 | break; |
| 888 | case 9: |
| 889 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_PR, t, arg); |
| 890 | break; |
| 891 | case 10: |
| 892 | UNW_DEC_REG_WHEN ("P7", UNW_REG_LC, t, arg); |
| 893 | break; |
| 894 | case 11: |
| 895 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_LC, t, arg); |
| 896 | break; |
| 897 | case 12: |
| 898 | UNW_DEC_REG_WHEN ("P7", UNW_REG_UNAT, t, arg); |
| 899 | break; |
| 900 | case 13: |
| 901 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_UNAT, t, arg); |
| 902 | break; |
| 903 | case 14: |
| 904 | UNW_DEC_REG_WHEN ("P7", UNW_REG_FPSR, t, arg); |
| 905 | break; |
| 906 | case 15: |
| 907 | UNW_DEC_REG_PSPREL ("P7", UNW_REG_FPSR, t, arg); |
| 908 | break; |
| 909 | default: |
| 910 | UNW_DEC_BAD_CODE (r); |
| 911 | break; |
| 912 | } |
| 913 | } |
| 914 | else |
| 915 | { |
| 916 | switch (code & 0xf) |
| 917 | { |
| 918 | case 0x0: /* p8 */ |
| 919 | { |
| 920 | r = *dp++; |
| 921 | t = unw_decode_uleb128 (&dp); |
| 922 | switch (r) |
| 923 | { |
| 924 | case 1: |
| 925 | UNW_DEC_REG_SPREL ("P8", UNW_REG_RP, t, arg); |
| 926 | break; |
| 927 | case 2: |
| 928 | UNW_DEC_REG_SPREL ("P8", UNW_REG_PFS, t, arg); |
| 929 | break; |
| 930 | case 3: |
| 931 | UNW_DEC_REG_SPREL ("P8", UNW_REG_PR, t, arg); |
| 932 | break; |
| 933 | case 4: |
| 934 | UNW_DEC_REG_SPREL ("P8", UNW_REG_LC, t, arg); |
| 935 | break; |
| 936 | case 5: |
| 937 | UNW_DEC_REG_SPREL ("P8", UNW_REG_UNAT, t, arg); |
| 938 | break; |
| 939 | case 6: |
| 940 | UNW_DEC_REG_SPREL ("P8", UNW_REG_FPSR, t, arg); |
| 941 | break; |
| 942 | case 7: |
| 943 | UNW_DEC_REG_WHEN ("P8", UNW_REG_BSP, t, arg); |
| 944 | break; |
| 945 | case 8: |
| 946 | UNW_DEC_REG_PSPREL ("P8", UNW_REG_BSP, t, arg); |
| 947 | break; |
| 948 | case 9: |
| 949 | UNW_DEC_REG_SPREL ("P8", UNW_REG_BSP, t, arg); |
| 950 | break; |
| 951 | case 10: |
| 952 | UNW_DEC_REG_WHEN ("P8", UNW_REG_BSPSTORE, t, arg); |
| 953 | break; |
| 954 | case 11: |
| 955 | UNW_DEC_REG_PSPREL ("P8", UNW_REG_BSPSTORE, t, arg); |
| 956 | break; |
| 957 | case 12: |
| 958 | UNW_DEC_REG_SPREL ("P8", UNW_REG_BSPSTORE, t, arg); |
| 959 | break; |
| 960 | case 13: |
| 961 | UNW_DEC_REG_WHEN ("P8", UNW_REG_RNAT, t, arg); |
| 962 | break; |
| 963 | case 14: |
| 964 | UNW_DEC_REG_PSPREL ("P8", UNW_REG_RNAT, t, arg); |
| 965 | break; |
| 966 | case 15: |
| 967 | UNW_DEC_REG_SPREL ("P8", UNW_REG_RNAT, t, arg); |
| 968 | break; |
| 969 | case 16: |
| 970 | UNW_DEC_PRIUNAT_WHEN_GR ("P8", t, arg); |
| 971 | break; |
| 972 | case 17: |
| 973 | UNW_DEC_PRIUNAT_PSPREL ("P8", t, arg); |
| 974 | break; |
| 975 | case 18: |
| 976 | UNW_DEC_PRIUNAT_SPREL ("P8", t, arg); |
| 977 | break; |
| 978 | case 19: |
| 979 | UNW_DEC_PRIUNAT_WHEN_MEM ("P8", t, arg); |
| 980 | break; |
| 981 | default: |
| 982 | UNW_DEC_BAD_CODE (r); |
| 983 | break; |
| 984 | } |
| 985 | } |
| 986 | break; |
| 987 | |
| 988 | case 0x1: |
| 989 | byte1 = *dp++; |
| 990 | byte2 = *dp++; |
| 991 | UNW_DEC_GR_GR ("P9", (byte1 & 0xf), (byte2 & 0x7f), arg); |
| 992 | break; |
| 993 | |
| 994 | case 0xf: /* p10 */ |
| 995 | byte1 = *dp++; |
| 996 | byte2 = *dp++; |
| 997 | UNW_DEC_ABI ("P10", byte1, byte2, arg); |
| 998 | break; |
| 999 | |
| 1000 | case 0x9: |
| 1001 | return unw_decode_x1 (dp, code, arg); |
| 1002 | |
| 1003 | case 0xa: |
| 1004 | return unw_decode_x2 (dp, code, arg); |
| 1005 | |
| 1006 | case 0xb: |
| 1007 | return unw_decode_x3 (dp, code, arg); |
| 1008 | |
| 1009 | case 0xc: |
| 1010 | return unw_decode_x4 (dp, code, arg); |
| 1011 | |
| 1012 | default: |
| 1013 | UNW_DEC_BAD_CODE (code); |
| 1014 | break; |
| 1015 | } |
| 1016 | } |
| 1017 | return dp; |
| 1018 | } |
| 1019 | |
| 1020 | static const unsigned char * |
| 1021 | unw_decode_b1 (dp, code, arg) |
| 1022 | const unsigned char * dp; |
| 1023 | unsigned int code; |
| 1024 | void * arg ATTRIBUTE_UNUSED; |
| 1025 | { |
| 1026 | unw_word label = (code & 0x1f); |
| 1027 | |
| 1028 | if ((code & 0x20) != 0) |
| 1029 | UNW_DEC_COPY_STATE ("B1", label, arg); |
| 1030 | else |
| 1031 | UNW_DEC_LABEL_STATE ("B1", label, arg); |
| 1032 | return dp; |
| 1033 | } |
| 1034 | |
| 1035 | static const unsigned char * |
| 1036 | unw_decode_b2 (dp, code, arg) |
| 1037 | const unsigned char * dp; |
| 1038 | unsigned int code; |
| 1039 | void * arg ATTRIBUTE_UNUSED; |
| 1040 | { |
| 1041 | unw_word t; |
| 1042 | |
| 1043 | t = unw_decode_uleb128 (& dp); |
| 1044 | UNW_DEC_EPILOGUE ("B2", t, (code & 0x1f), arg); |
| 1045 | return dp; |
| 1046 | } |
| 1047 | |
| 1048 | static const unsigned char * |
| 1049 | unw_decode_b3_x4 (dp, code, arg) |
| 1050 | const unsigned char *dp; |
| 1051 | unsigned int code; |
| 1052 | void *arg; |
| 1053 | { |
| 1054 | unw_word t, ecount, label; |
| 1055 | |
| 1056 | if ((code & 0x10) == 0) |
| 1057 | { |
| 1058 | t = unw_decode_uleb128 (&dp); |
| 1059 | ecount = unw_decode_uleb128 (&dp); |
| 1060 | UNW_DEC_EPILOGUE ("B3", t, ecount, arg); |
| 1061 | } |
| 1062 | else if ((code & 0x07) == 0) |
| 1063 | { |
| 1064 | label = unw_decode_uleb128 (&dp); |
| 1065 | if ((code & 0x08) != 0) |
| 1066 | UNW_DEC_COPY_STATE ("B4", label, arg); |
| 1067 | else |
| 1068 | UNW_DEC_LABEL_STATE ("B4", label, arg); |
| 1069 | } |
| 1070 | else |
| 1071 | switch (code & 0x7) |
| 1072 | { |
| 1073 | case 1: |
| 1074 | return unw_decode_x1 (dp, code, arg); |
| 1075 | case 2: |
| 1076 | return unw_decode_x2 (dp, code, arg); |
| 1077 | case 3: |
| 1078 | return unw_decode_x3 (dp, code, arg); |
| 1079 | case 4: |
| 1080 | return unw_decode_x4 (dp, code, arg); |
| 1081 | default: |
| 1082 | UNW_DEC_BAD_CODE (code); |
| 1083 | break; |
| 1084 | } |
| 1085 | return dp; |
| 1086 | } |
| 1087 | |
| 1088 | typedef const unsigned char *(*unw_decoder) |
| 1089 | PARAMS ((const unsigned char *, unsigned int, void *)); |
| 1090 | |
| 1091 | static unw_decoder unw_decode_table[2][8] = |
| 1092 | { |
| 1093 | /* prologue table: */ |
| 1094 | { |
| 1095 | unw_decode_r1, /* 0 */ |
| 1096 | unw_decode_r1, |
| 1097 | unw_decode_r2, |
| 1098 | unw_decode_r3, |
| 1099 | unw_decode_p1, /* 4 */ |
| 1100 | unw_decode_p2_p5, |
| 1101 | unw_decode_p6, |
| 1102 | unw_decode_p7_p10 |
| 1103 | }, |
| 1104 | { |
| 1105 | unw_decode_r1, /* 0 */ |
| 1106 | unw_decode_r1, |
| 1107 | unw_decode_r2, |
| 1108 | unw_decode_r3, |
| 1109 | unw_decode_b1, /* 4 */ |
| 1110 | unw_decode_b1, |
| 1111 | unw_decode_b2, |
| 1112 | unw_decode_b3_x4 |
| 1113 | } |
| 1114 | }; |
| 1115 | |
| 1116 | /* Decode one descriptor and return address of next descriptor. */ |
| 1117 | const unsigned char * |
| 1118 | unw_decode (dp, inside_body, ptr_inside_body) |
| 1119 | const unsigned char * dp; |
| 1120 | int inside_body; |
| 1121 | void * ptr_inside_body; |
| 1122 | { |
| 1123 | unw_decoder decoder; |
| 1124 | unsigned char code; |
| 1125 | |
| 1126 | code = *dp++; |
| 1127 | decoder = unw_decode_table[inside_body][code >> 5]; |
| 1128 | return (*decoder) (dp, code, ptr_inside_body); |
| 1129 | } |