gdb/mn10300-linux-tdep.c

   1 /* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
   2
   3    Copyright (C) 2003-2014 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   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 of the License, or
  10    (at your option) 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, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "gdbcore.h"
  22 #include <string.h>
  23 #include "regcache.h"
  24 #include "mn10300-tdep.h"
  25 #include "bfd.h"
  26 #include "elf-bfd.h"
  27 #include "osabi.h"
  28 #include "regset.h"
  29 #include "solib-svr4.h"
  30 #include "frame.h"
  31 #include "trad-frame.h"
  32 #include "tramp-frame.h"
  33 #include "linux-tdep.h"
  34
  35 /* Transliterated from <asm-mn10300/elf.h>...  */
  36 #define MN10300_ELF_NGREG 28
  37 #define MN10300_ELF_NFPREG 32
  38
  39 typedef gdb_byte   mn10300_elf_greg_t[4];
  40 typedef mn10300_elf_greg_t mn10300_elf_gregset_t[MN10300_ELF_NGREG];
  41
  42 typedef gdb_byte   mn10300_elf_fpreg_t[4];
  43 typedef struct
  44 {
  45   mn10300_elf_fpreg_t fpregs[MN10300_ELF_NFPREG];
  46   gdb_byte    fpcr[4];
  47 } mn10300_elf_fpregset_t;
  48
  49 /* elf_gregset_t register indices stolen from include/asm-mn10300/ptrace.h.  */
  50 #define MN10300_ELF_GREGSET_T_REG_INDEX_A3      0
  51 #define MN10300_ELF_GREGSET_T_REG_INDEX_A2      1
  52 #define MN10300_ELF_GREGSET_T_REG_INDEX_D3      2
  53 #define MN10300_ELF_GREGSET_T_REG_INDEX_D2      3
  54 #define MN10300_ELF_GREGSET_T_REG_INDEX_MCVF    4
  55 #define MN10300_ELF_GREGSET_T_REG_INDEX_MCRL    5
  56 #define MN10300_ELF_GREGSET_T_REG_INDEX_MCRH    6
  57 #define MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ    7
  58 #define MN10300_ELF_GREGSET_T_REG_INDEX_E1      8
  59 #define MN10300_ELF_GREGSET_T_REG_INDEX_E0      9
  60 #define MN10300_ELF_GREGSET_T_REG_INDEX_E7      10
  61 #define MN10300_ELF_GREGSET_T_REG_INDEX_E6      11
  62 #define MN10300_ELF_GREGSET_T_REG_INDEX_E5      12
  63 #define MN10300_ELF_GREGSET_T_REG_INDEX_E4      13
  64 #define MN10300_ELF_GREGSET_T_REG_INDEX_E3      14
  65 #define MN10300_ELF_GREGSET_T_REG_INDEX_E2      15
  66 #define MN10300_ELF_GREGSET_T_REG_INDEX_SP      16
  67 #define MN10300_ELF_GREGSET_T_REG_INDEX_LAR     17
  68 #define MN10300_ELF_GREGSET_T_REG_INDEX_LIR     18
  69 #define MN10300_ELF_GREGSET_T_REG_INDEX_MDR     19
  70 #define MN10300_ELF_GREGSET_T_REG_INDEX_A1      20
  71 #define MN10300_ELF_GREGSET_T_REG_INDEX_A0      21
  72 #define MN10300_ELF_GREGSET_T_REG_INDEX_D1      22
  73 #define MN10300_ELF_GREGSET_T_REG_INDEX_D0      23
  74 #define MN10300_ELF_GREGSET_T_REG_INDEX_ORIG_D0 24
  75 #define MN10300_ELF_GREGSET_T_REG_INDEX_EPSW    25
  76 #define MN10300_ELF_GREGSET_T_REG_INDEX_PC      26
  77
  78 /* New gdbarch API for corefile registers.
  79    Given a section name and size, create a struct reg object
  80    with a supply_register and a collect_register method.  */
  81
  82 /* Copy register value of REGNUM from regset to regcache.
  83    If REGNUM is -1, do this for all gp registers in regset.  */
  84
  85 static void
  86 am33_supply_gregset_method (const struct regset *regset,
  87                             struct regcache *regcache,
  88                             int regnum, const void *gregs, size_t len)
  89 {
  90   char zerobuf[MAX_REGISTER_SIZE];
  91   const mn10300_elf_greg_t *regp = (const mn10300_elf_greg_t *) gregs;
  92   int i;
  93
  94   gdb_assert (len == sizeof (mn10300_elf_gregset_t));
  95
  96   switch (regnum) {
  97   case E_D0_REGNUM:
  98     regcache_raw_supply (regcache, E_D0_REGNUM,
  99                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D0));
 100     break;
 101   case E_D1_REGNUM:
 102     regcache_raw_supply (regcache, E_D1_REGNUM,
 103                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D1));
 104     break;
 105   case E_D2_REGNUM:
 106     regcache_raw_supply (regcache, E_D2_REGNUM,
 107                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D2));
 108     break;
 109   case E_D3_REGNUM:
 110     regcache_raw_supply (regcache, E_D3_REGNUM,
 111                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D3));
 112     break;
 113   case E_A0_REGNUM:
 114     regcache_raw_supply (regcache, E_A0_REGNUM,
 115                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A0));
 116     break;
 117   case E_A1_REGNUM:
 118     regcache_raw_supply (regcache, E_A1_REGNUM,
 119                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A1));
 120     break;
 121   case E_A2_REGNUM:
 122     regcache_raw_supply (regcache, E_A2_REGNUM,
 123                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A2));
 124     break;
 125   case E_A3_REGNUM:
 126     regcache_raw_supply (regcache, E_A3_REGNUM,
 127                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A3));
 128     break;
 129   case E_SP_REGNUM:
 130     regcache_raw_supply (regcache, E_SP_REGNUM,
 131                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_SP));
 132     break;
 133   case E_PC_REGNUM:
 134     regcache_raw_supply (regcache, E_PC_REGNUM,
 135                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_PC));
 136     break;
 137   case E_MDR_REGNUM:
 138     regcache_raw_supply (regcache, E_MDR_REGNUM,
 139                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDR));
 140     break;
 141   case E_PSW_REGNUM:
 142     regcache_raw_supply (regcache, E_PSW_REGNUM,
 143                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_EPSW));
 144     break;
 145   case E_LIR_REGNUM:
 146     regcache_raw_supply (regcache, E_LIR_REGNUM,
 147                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LIR));
 148     break;
 149   case E_LAR_REGNUM:
 150     regcache_raw_supply (regcache, E_LAR_REGNUM,
 151                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LAR));
 152     break;
 153   case E_MDRQ_REGNUM:
 154     regcache_raw_supply (regcache, E_MDRQ_REGNUM,
 155                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ));
 156     break;
 157   case E_E0_REGNUM:
 158     regcache_raw_supply (regcache, E_E0_REGNUM,
 159                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E0));
 160     break;
 161   case E_E1_REGNUM:
 162     regcache_raw_supply (regcache, E_E1_REGNUM,
 163                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E1));
 164     break;
 165   case E_E2_REGNUM:
 166     regcache_raw_supply (regcache, E_E2_REGNUM,
 167                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E2));
 168     break;
 169   case E_E3_REGNUM:
 170     regcache_raw_supply (regcache, E_E3_REGNUM,
 171                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E3));
 172     break;
 173   case E_E4_REGNUM:
 174     regcache_raw_supply (regcache, E_E4_REGNUM,
 175                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E4));
 176     break;
 177   case E_E5_REGNUM:
 178     regcache_raw_supply (regcache, E_E5_REGNUM,
 179                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E5));
 180     break;
 181   case E_E6_REGNUM:
 182     regcache_raw_supply (regcache, E_E6_REGNUM,
 183                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E6));
 184     break;
 185   case E_E7_REGNUM:
 186     regcache_raw_supply (regcache, E_E7_REGNUM,
 187                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E7));
 188     break;
 189
 190     /* ssp, msp, and usp are inaccessible.  */
 191   case E_E8_REGNUM:
 192     memset (zerobuf, 0, MAX_REGISTER_SIZE);
 193     regcache_raw_supply (regcache, E_E8_REGNUM, zerobuf);
 194     break;
 195   case E_E9_REGNUM:
 196     memset (zerobuf, 0, MAX_REGISTER_SIZE);
 197     regcache_raw_supply (regcache, E_E9_REGNUM, zerobuf);
 198     break;
 199   case E_E10_REGNUM:
 200     memset (zerobuf, 0, MAX_REGISTER_SIZE);
 201     regcache_raw_supply (regcache, E_E10_REGNUM, zerobuf);
 202
 203     break;
 204   case E_MCRH_REGNUM:
 205     regcache_raw_supply (regcache, E_MCRH_REGNUM,
 206                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRH));
 207     break;
 208   case E_MCRL_REGNUM:
 209     regcache_raw_supply (regcache, E_MCRL_REGNUM,
 210                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRL));
 211     break;
 212   case E_MCVF_REGNUM:
 213     regcache_raw_supply (regcache, E_MCVF_REGNUM,
 214                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCVF));
 215     break;
 216   case E_FPCR_REGNUM:
 217     /* FPCR is numbered among the GP regs, but handled as an FP reg.
 218        Do nothing.  */
 219     break;
 220   case E_FPCR_REGNUM + 1:
 221     /* The two unused registers beyond fpcr are inaccessible.  */
 222     memset (zerobuf, 0, MAX_REGISTER_SIZE);
 223     regcache_raw_supply (regcache, E_FPCR_REGNUM + 1, zerobuf);
 224     break;
 225   case E_FPCR_REGNUM + 2:
 226     memset (zerobuf, 0, MAX_REGISTER_SIZE);
 227     regcache_raw_supply (regcache, E_FPCR_REGNUM + 2, zerobuf);
 228     break;
 229   default:      /* An error, obviously, but should we error out?  */
 230     break;
 231   case -1:
 232     for (i = 0; i < MN10300_ELF_NGREG; i++)
 233       am33_supply_gregset_method (regset, regcache, i, gregs, len);
 234     break;
 235   }
 236   return;
 237 }
 238
 239 /* Copy fp register value of REGNUM from regset to regcache.
 240    If REGNUM is -1, do this for all fp registers in regset.  */
 241
 242 static void
 243 am33_supply_fpregset_method (const struct regset *regset,
 244                              struct regcache *regcache,
 245                              int regnum, const void *fpregs, size_t len)
 246 {
 247   const mn10300_elf_fpregset_t *fpregset = fpregs;
 248
 249   gdb_assert (len == sizeof (mn10300_elf_fpregset_t));
 250
 251   if (regnum == -1)
 252     {
 253       int i;
 254
 255       for (i = 0; i < MN10300_ELF_NFPREG; i++)
 256         am33_supply_fpregset_method (regset, regcache,
 257                                      E_FS0_REGNUM + i, fpregs, len);
 258       am33_supply_fpregset_method (regset, regcache,
 259                                    E_FPCR_REGNUM, fpregs, len);
 260     }
 261   else if (regnum == E_FPCR_REGNUM)
 262     regcache_raw_supply (regcache, E_FPCR_REGNUM,
 263                          &fpregset->fpcr);
 264   else if (E_FS0_REGNUM <= regnum
 265            && regnum < E_FS0_REGNUM + MN10300_ELF_NFPREG)
 266     regcache_raw_supply (regcache, regnum,
 267                          &fpregset->fpregs[regnum - E_FS0_REGNUM]);
 268
 269   return;
 270 }
 271
 272 /* Copy register values from regcache to regset.  */
 273
 274 static void
 275 am33_collect_gregset_method (const struct regset *regset,
 276                              const struct regcache *regcache,
 277                              int regnum, void *gregs, size_t len)
 278 {
 279   mn10300_elf_gregset_t *regp = gregs;
 280   int i;
 281
 282   gdb_assert (len == sizeof (mn10300_elf_gregset_t));
 283
 284   switch (regnum) {
 285   case E_D0_REGNUM:
 286     regcache_raw_collect (regcache, E_D0_REGNUM,
 287                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D0));
 288     break;
 289   case E_D1_REGNUM:
 290     regcache_raw_collect (regcache, E_D1_REGNUM,
 291                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D1));
 292     break;
 293   case E_D2_REGNUM:
 294     regcache_raw_collect (regcache, E_D2_REGNUM,
 295                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D2));
 296     break;
 297   case E_D3_REGNUM:
 298     regcache_raw_collect (regcache, E_D3_REGNUM,
 299                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D3));
 300     break;
 301   case E_A0_REGNUM:
 302     regcache_raw_collect (regcache, E_A0_REGNUM,
 303                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A0));
 304     break;
 305   case E_A1_REGNUM:
 306     regcache_raw_collect (regcache, E_A1_REGNUM,
 307                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A1));
 308     break;
 309   case E_A2_REGNUM:
 310     regcache_raw_collect (regcache, E_A2_REGNUM,
 311                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A2));
 312     break;
 313   case E_A3_REGNUM:
 314     regcache_raw_collect (regcache, E_A3_REGNUM,
 315                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A3));
 316     break;
 317   case E_SP_REGNUM:
 318     regcache_raw_collect (regcache, E_SP_REGNUM,
 319                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_SP));
 320     break;
 321   case E_PC_REGNUM:
 322     regcache_raw_collect (regcache, E_PC_REGNUM,
 323                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_PC));
 324     break;
 325   case E_MDR_REGNUM:
 326     regcache_raw_collect (regcache, E_MDR_REGNUM,
 327                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDR));
 328     break;
 329   case E_PSW_REGNUM:
 330     regcache_raw_collect (regcache, E_PSW_REGNUM,
 331                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_EPSW));
 332     break;
 333   case E_LIR_REGNUM:
 334     regcache_raw_collect (regcache, E_LIR_REGNUM,
 335                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LIR));
 336     break;
 337   case E_LAR_REGNUM:
 338     regcache_raw_collect (regcache, E_LAR_REGNUM,
 339                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LAR));
 340     break;
 341   case E_MDRQ_REGNUM:
 342     regcache_raw_collect (regcache, E_MDRQ_REGNUM,
 343                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ));
 344     break;
 345   case E_E0_REGNUM:
 346     regcache_raw_collect (regcache, E_E0_REGNUM,
 347                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E0));
 348     break;
 349   case E_E1_REGNUM:
 350     regcache_raw_collect (regcache, E_E1_REGNUM,
 351                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E1));
 352     break;
 353   case E_E2_REGNUM:
 354     regcache_raw_collect (regcache, E_E2_REGNUM,
 355                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E2));
 356     break;
 357   case E_E3_REGNUM:
 358     regcache_raw_collect (regcache, E_E3_REGNUM,
 359                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E3));
 360     break;
 361   case E_E4_REGNUM:
 362     regcache_raw_collect (regcache, E_E4_REGNUM,
 363                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E4));
 364     break;
 365   case E_E5_REGNUM:
 366     regcache_raw_collect (regcache, E_E5_REGNUM,
 367                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E5));
 368     break;
 369   case E_E6_REGNUM:
 370     regcache_raw_collect (regcache, E_E6_REGNUM,
 371                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E6));
 372     break;
 373   case E_E7_REGNUM:
 374     regcache_raw_collect (regcache, E_E7_REGNUM,
 375                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E7));
 376     break;
 377
 378     /* ssp, msp, and usp are inaccessible.  */
 379   case E_E8_REGNUM:
 380     /* The gregset struct has noplace to put this: do nothing.  */
 381     break;
 382   case E_E9_REGNUM:
 383     /* The gregset struct has noplace to put this: do nothing.  */
 384     break;
 385   case E_E10_REGNUM:
 386     /* The gregset struct has noplace to put this: do nothing.  */
 387     break;
 388   case E_MCRH_REGNUM:
 389     regcache_raw_collect (regcache, E_MCRH_REGNUM,
 390                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRH));
 391     break;
 392   case E_MCRL_REGNUM:
 393     regcache_raw_collect (regcache, E_MCRL_REGNUM,
 394                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRL));
 395     break;
 396   case E_MCVF_REGNUM:
 397     regcache_raw_collect (regcache, E_MCVF_REGNUM,
 398                          (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCVF));
 399     break;
 400   case E_FPCR_REGNUM:
 401     /* FPCR is numbered among the GP regs, but handled as an FP reg.
 402        Do nothing.  */
 403     break;
 404   case E_FPCR_REGNUM + 1:
 405     /* The gregset struct has noplace to put this: do nothing.  */
 406     break;
 407   case E_FPCR_REGNUM + 2:
 408     /* The gregset struct has noplace to put this: do nothing.  */
 409     break;
 410   default:      /* An error, obviously, but should we error out?  */
 411     break;
 412   case -1:
 413     for (i = 0; i < MN10300_ELF_NGREG; i++)
 414       am33_collect_gregset_method (regset, regcache, i, gregs, len);
 415     break;
 416   }
 417   return;
 418 }
 419
 420 /* Copy fp register values from regcache to regset.  */
 421
 422 static void
 423 am33_collect_fpregset_method (const struct regset *regset,
 424                               const struct regcache *regcache,
 425                               int regnum, void *fpregs, size_t len)
 426 {
 427   mn10300_elf_fpregset_t *fpregset = fpregs;
 428
 429   gdb_assert (len == sizeof (mn10300_elf_fpregset_t));
 430
 431   if (regnum == -1)
 432     {
 433       int i;
 434       for (i = 0; i < MN10300_ELF_NFPREG; i++)
 435         am33_collect_fpregset_method (regset, regcache, E_FS0_REGNUM + i,
 436                                       fpregs, len);
 437       am33_collect_fpregset_method (regset, regcache,
 438                                     E_FPCR_REGNUM, fpregs, len);
 439     }
 440   else if (regnum == E_FPCR_REGNUM)
 441     regcache_raw_collect (regcache, E_FPCR_REGNUM,
 442                           &fpregset->fpcr);
 443   else if (E_FS0_REGNUM <= regnum
 444            && regnum < E_FS0_REGNUM + MN10300_ELF_NFPREG)
 445     regcache_raw_collect (regcache, regnum,
 446                           &fpregset->fpregs[regnum - E_FS0_REGNUM]);
 447
 448   return;
 449 }
 450
 451 static const struct regset am33_gregset =
 452   {
 453     NULL, am33_supply_gregset_method, am33_collect_gregset_method
 454   };
 455
 456 static const struct regset am33_fpregset =
 457   {
 458     NULL, am33_supply_fpregset_method, am33_collect_fpregset_method
 459   };
 460
 461 /* Create a struct regset from a corefile register section.  */
 462
 463 static const struct regset *
 464 am33_regset_from_core_section (struct gdbarch *gdbarch,
 465                                const char *sect_name,
 466                                size_t sect_size)
 467 {
 468   if (sect_size == sizeof (mn10300_elf_fpregset_t))
 469     return &am33_fpregset;
 470   else
 471     return &am33_gregset;
 472 }
 473 \f
 474 static void
 475 am33_linux_sigframe_cache_init (const struct tramp_frame *self,
 476                                 struct frame_info *this_frame,
 477                                 struct trad_frame_cache *this_cache,
 478                                 CORE_ADDR func);
 479
 480 static const struct tramp_frame am33_linux_sigframe = {
 481   SIGTRAMP_FRAME,
 482   1,
 483   {
 484     /* mov     119,d0 */
 485     { 0x2c, -1 },
 486     { 0x77, -1 },
 487     { 0x00, -1 },
 488     /* syscall 0 */
 489     { 0xf0, -1 },
 490     { 0xe0, -1 },
 491     { TRAMP_SENTINEL_INSN, -1 }
 492   },
 493   am33_linux_sigframe_cache_init
 494 };
 495
 496 static const struct tramp_frame am33_linux_rt_sigframe = {
 497   SIGTRAMP_FRAME,
 498   1,
 499   {
 500     /* mov     173,d0 */
 501     { 0x2c, -1 },
 502     { 0xad, -1 },
 503     { 0x00, -1 },
 504     /* syscall 0 */
 505     { 0xf0, -1 },
 506     { 0xe0, -1 },
 507     { TRAMP_SENTINEL_INSN, -1 }
 508   },
 509   am33_linux_sigframe_cache_init
 510 };
 511
 512 /* Relevant struct definitions for signal handling...
 513
 514 From arch/mn10300/kernel/sigframe.h:
 515
 516 struct sigframe
 517 {
 518         void (*pretcode)(void);
 519         int sig;
 520         struct sigcontext *psc;
 521         struct sigcontext sc;
 522         struct fpucontext fpuctx;
 523         unsigned long extramask[_NSIG_WORDS-1];
 524         char retcode[8];
 525 };
 526
 527 struct rt_sigframe
 528 {
 529         void (*pretcode)(void);
 530         int sig;
 531         struct siginfo *pinfo;
 532         void *puc;
 533         struct siginfo info;
 534         struct ucontext uc;
 535         struct fpucontext fpuctx;
 536         char retcode[8];
 537 };
 538
 539 From include/asm-mn10300/ucontext.h:
 540
 541 struct ucontext {
 542         unsigned long     uc_flags;
 543         struct ucontext  *uc_link;
 544         stack_t           uc_stack;
 545         struct sigcontext uc_mcontext;
 546         sigset_t          uc_sigmask;
 547 };
 548
 549 From include/asm-mn10300/sigcontext.h:
 550
 551 struct fpucontext {
 552         unsigned long   fs[32];
 553         unsigned long   fpcr;
 554 };
 555
 556 struct sigcontext {
 557         unsigned long   d0;
 558         unsigned long   d1;
 559         unsigned long   d2;
 560         unsigned long   d3;
 561         unsigned long   a0;
 562         unsigned long   a1;
 563         unsigned long   a2;
 564         unsigned long   a3;
 565         unsigned long   e0;
 566         unsigned long   e1;
 567         unsigned long   e2;
 568         unsigned long   e3;
 569         unsigned long   e4;
 570         unsigned long   e5;
 571         unsigned long   e6;
 572         unsigned long   e7;
 573         unsigned long   lar;
 574         unsigned long   lir;
 575         unsigned long   mdr;
 576         unsigned long   mcvf;
 577         unsigned long   mcrl;
 578         unsigned long   mcrh;
 579         unsigned long   mdrq;
 580         unsigned long   sp;
 581         unsigned long   epsw;
 582         unsigned long   pc;
 583         struct fpucontext *fpucontext;
 584         unsigned long   oldmask;
 585 }; */
 586
 587
 588 #define AM33_SIGCONTEXT_D0 0
 589 #define AM33_SIGCONTEXT_D1 4
 590 #define AM33_SIGCONTEXT_D2 8
 591 #define AM33_SIGCONTEXT_D3 12
 592 #define AM33_SIGCONTEXT_A0 16
 593 #define AM33_SIGCONTEXT_A1 20
 594 #define AM33_SIGCONTEXT_A2 24
 595 #define AM33_SIGCONTEXT_A3 28
 596 #define AM33_SIGCONTEXT_E0 32
 597 #define AM33_SIGCONTEXT_E1 36
 598 #define AM33_SIGCONTEXT_E2 40
 599 #define AM33_SIGCONTEXT_E3 44
 600 #define AM33_SIGCONTEXT_E4 48
 601 #define AM33_SIGCONTEXT_E5 52
 602 #define AM33_SIGCONTEXT_E6 56
 603 #define AM33_SIGCONTEXT_E7 60
 604 #define AM33_SIGCONTEXT_LAR 64
 605 #define AM33_SIGCONTEXT_LIR 68
 606 #define AM33_SIGCONTEXT_MDR 72
 607 #define AM33_SIGCONTEXT_MCVF 76
 608 #define AM33_SIGCONTEXT_MCRL 80
 609 #define AM33_SIGCONTEXT_MCRH 84
 610 #define AM33_SIGCONTEXT_MDRQ 88
 611 #define AM33_SIGCONTEXT_SP 92
 612 #define AM33_SIGCONTEXT_EPSW 96
 613 #define AM33_SIGCONTEXT_PC 100
 614 #define AM33_SIGCONTEXT_FPUCONTEXT 104
 615
 616
 617 static void
 618 am33_linux_sigframe_cache_init (const struct tramp_frame *self,
 619                                 struct frame_info *this_frame,
 620                                 struct trad_frame_cache *this_cache,
 621                                 CORE_ADDR func)
 622 {
 623   CORE_ADDR sc_base, fpubase;
 624   int i;
 625
 626   sc_base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
 627   if (self == &am33_linux_sigframe)
 628     {
 629       sc_base += 8;
 630       sc_base = get_frame_memory_unsigned (this_frame, sc_base, 4);
 631     }
 632   else
 633     {
 634       sc_base += 12;
 635       sc_base = get_frame_memory_unsigned (this_frame, sc_base, 4);
 636       sc_base += 20;
 637     }
 638
 639   trad_frame_set_reg_addr (this_cache, E_D0_REGNUM,
 640                            sc_base + AM33_SIGCONTEXT_D0);
 641   trad_frame_set_reg_addr (this_cache, E_D1_REGNUM,
 642                            sc_base + AM33_SIGCONTEXT_D1);
 643   trad_frame_set_reg_addr (this_cache, E_D2_REGNUM,
 644                            sc_base + AM33_SIGCONTEXT_D2);
 645   trad_frame_set_reg_addr (this_cache, E_D3_REGNUM,
 646                            sc_base + AM33_SIGCONTEXT_D3);
 647
 648   trad_frame_set_reg_addr (this_cache, E_A0_REGNUM,
 649                            sc_base + AM33_SIGCONTEXT_A0);
 650   trad_frame_set_reg_addr (this_cache, E_A1_REGNUM,
 651                            sc_base + AM33_SIGCONTEXT_A1);
 652   trad_frame_set_reg_addr (this_cache, E_A2_REGNUM,
 653                            sc_base + AM33_SIGCONTEXT_A2);
 654   trad_frame_set_reg_addr (this_cache, E_A3_REGNUM,
 655                            sc_base + AM33_SIGCONTEXT_A3);
 656
 657   trad_frame_set_reg_addr (this_cache, E_E0_REGNUM,
 658                            sc_base + AM33_SIGCONTEXT_E0);
 659   trad_frame_set_reg_addr (this_cache, E_E1_REGNUM,
 660                            sc_base + AM33_SIGCONTEXT_E1);
 661   trad_frame_set_reg_addr (this_cache, E_E2_REGNUM,
 662                            sc_base + AM33_SIGCONTEXT_E2);
 663   trad_frame_set_reg_addr (this_cache, E_E3_REGNUM,
 664                            sc_base + AM33_SIGCONTEXT_E3);
 665   trad_frame_set_reg_addr (this_cache, E_E4_REGNUM,
 666                            sc_base + AM33_SIGCONTEXT_E4);
 667   trad_frame_set_reg_addr (this_cache, E_E5_REGNUM,
 668                            sc_base + AM33_SIGCONTEXT_E5);
 669   trad_frame_set_reg_addr (this_cache, E_E6_REGNUM,
 670                            sc_base + AM33_SIGCONTEXT_E6);
 671   trad_frame_set_reg_addr (this_cache, E_E7_REGNUM,
 672                            sc_base + AM33_SIGCONTEXT_E7);
 673
 674   trad_frame_set_reg_addr (this_cache, E_LAR_REGNUM,
 675                            sc_base + AM33_SIGCONTEXT_LAR);
 676   trad_frame_set_reg_addr (this_cache, E_LIR_REGNUM,
 677                            sc_base + AM33_SIGCONTEXT_LIR);
 678   trad_frame_set_reg_addr (this_cache, E_MDR_REGNUM,
 679                            sc_base + AM33_SIGCONTEXT_MDR);
 680   trad_frame_set_reg_addr (this_cache, E_MCVF_REGNUM,
 681                            sc_base + AM33_SIGCONTEXT_MCVF);
 682   trad_frame_set_reg_addr (this_cache, E_MCRL_REGNUM,
 683                            sc_base + AM33_SIGCONTEXT_MCRL);
 684   trad_frame_set_reg_addr (this_cache, E_MDRQ_REGNUM,
 685                            sc_base + AM33_SIGCONTEXT_MDRQ);
 686
 687   trad_frame_set_reg_addr (this_cache, E_SP_REGNUM,
 688                            sc_base + AM33_SIGCONTEXT_SP);
 689   trad_frame_set_reg_addr (this_cache, E_PSW_REGNUM,
 690                            sc_base + AM33_SIGCONTEXT_EPSW);
 691   trad_frame_set_reg_addr (this_cache, E_PC_REGNUM,
 692                            sc_base + AM33_SIGCONTEXT_PC);
 693
 694   fpubase = get_frame_memory_unsigned (this_frame,
 695                                        sc_base + AM33_SIGCONTEXT_FPUCONTEXT,
 696                                        4);
 697   if (fpubase)
 698     {
 699       for (i = 0; i < 32; i++)
 700         {
 701           trad_frame_set_reg_addr (this_cache, E_FS0_REGNUM + i,
 702                                    fpubase + 4 * i);
 703         }
 704       trad_frame_set_reg_addr (this_cache, E_FPCR_REGNUM, fpubase + 4 * 32);
 705     }
 706
 707   trad_frame_set_id (this_cache, frame_id_build (sc_base, func));
 708 }
 709 \f
 710 /* AM33 GNU/Linux osabi has been recognized.
 711    Now's our chance to register our corefile handling.  */
 712
 713 static void
 714 am33_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch)
 715 {
 716   linux_init_abi (info, gdbarch);
 717
 718   set_gdbarch_regset_from_core_section (gdbarch,
 719                                         am33_regset_from_core_section);
 720   set_solib_svr4_fetch_link_map_offsets
 721     (gdbarch, svr4_ilp32_fetch_link_map_offsets);
 722
 723   tramp_frame_prepend_unwinder (gdbarch, &am33_linux_sigframe);
 724   tramp_frame_prepend_unwinder (gdbarch, &am33_linux_rt_sigframe);
 725 }
 726
 727 /* Provide a prototype to silence -Wmissing-prototypes.  */
 728 extern initialize_file_ftype _initialize_mn10300_linux_tdep;
 729
 730 void
 731 _initialize_mn10300_linux_tdep (void)
 732 {
 733   gdbarch_register_osabi (bfd_arch_mn10300, 0,
 734                           GDB_OSABI_LINUX, am33_linux_init_osabi);
 735 }
 736