gdb/mn10300-linux-tdep.c

   1 /* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger.
   2
   3    Copyright (C) 2003-2024 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 "gdbcore.h"
  21 #include "regcache.h"
  22 #include "mn10300-tdep.h"
  23 #include "bfd.h"
  24 #include "elf-bfd.h"
  25 #include "osabi.h"
  26 #include "regset.h"
  27 #include "solib-svr4.h"
  28 #include "frame.h"
  29 #include "trad-frame.h"
  30 #include "tramp-frame.h"
  31 #include "linux-tdep.h"
  32 #include "gdbarch.h"
  33
  34 /* Transliterated from <asm-mn10300/elf.h>...  */
  35 #define MN10300_ELF_NGREG 28
  36 #define MN10300_ELF_NFPREG 32
  37
  38 typedef gdb_byte   mn10300_elf_greg_t[4];
  39 typedef mn10300_elf_greg_t mn10300_elf_gregset_t[MN10300_ELF_NGREG];
  40
  41 typedef gdb_byte   mn10300_elf_fpreg_t[4];
  42 typedef struct
  43 {
  44   mn10300_elf_fpreg_t fpregs[MN10300_ELF_NFPREG];
  45   gdb_byte    fpcr[4];
  46 } mn10300_elf_fpregset_t;
  47
  48 /* elf_gregset_t register indices stolen from include/asm-mn10300/ptrace.h.  */
  49 #define MN10300_ELF_GREGSET_T_REG_INDEX_A3      0
  50 #define MN10300_ELF_GREGSET_T_REG_INDEX_A2      1
  51 #define MN10300_ELF_GREGSET_T_REG_INDEX_D3      2
  52 #define MN10300_ELF_GREGSET_T_REG_INDEX_D2      3
  53 #define MN10300_ELF_GREGSET_T_REG_INDEX_MCVF    4
  54 #define MN10300_ELF_GREGSET_T_REG_INDEX_MCRL    5
  55 #define MN10300_ELF_GREGSET_T_REG_INDEX_MCRH    6
  56 #define MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ    7
  57 #define MN10300_ELF_GREGSET_T_REG_INDEX_E1      8
  58 #define MN10300_ELF_GREGSET_T_REG_INDEX_E0      9
  59 #define MN10300_ELF_GREGSET_T_REG_INDEX_E7      10
  60 #define MN10300_ELF_GREGSET_T_REG_INDEX_E6      11
  61 #define MN10300_ELF_GREGSET_T_REG_INDEX_E5      12
  62 #define MN10300_ELF_GREGSET_T_REG_INDEX_E4      13
  63 #define MN10300_ELF_GREGSET_T_REG_INDEX_E3      14
  64 #define MN10300_ELF_GREGSET_T_REG_INDEX_E2      15
  65 #define MN10300_ELF_GREGSET_T_REG_INDEX_SP      16
  66 #define MN10300_ELF_GREGSET_T_REG_INDEX_LAR     17
  67 #define MN10300_ELF_GREGSET_T_REG_INDEX_LIR     18
  68 #define MN10300_ELF_GREGSET_T_REG_INDEX_MDR     19
  69 #define MN10300_ELF_GREGSET_T_REG_INDEX_A1      20
  70 #define MN10300_ELF_GREGSET_T_REG_INDEX_A0      21
  71 #define MN10300_ELF_GREGSET_T_REG_INDEX_D1      22
  72 #define MN10300_ELF_GREGSET_T_REG_INDEX_D0      23
  73 #define MN10300_ELF_GREGSET_T_REG_INDEX_ORIG_D0 24
  74 #define MN10300_ELF_GREGSET_T_REG_INDEX_EPSW    25
  75 #define MN10300_ELF_GREGSET_T_REG_INDEX_PC      26
  76
  77 /* New gdbarch API for corefile registers.
  78    Given a section name and size, create a struct reg object
  79    with a supply_register and a collect_register method.  */
  80
  81 /* Copy register value of REGNUM from regset to regcache.
  82    If REGNUM is -1, do this for all gp registers in regset.  */
  83
  84 static void
  85 am33_supply_gregset_method (const struct regset *regset,
  86                             struct regcache *regcache,
  87                             int regnum, const void *gregs, size_t len)
  88 {
  89   const mn10300_elf_greg_t *regp = (const mn10300_elf_greg_t *) gregs;
  90   int i;
  91
  92   gdb_assert (len >= sizeof (mn10300_elf_gregset_t));
  93
  94   switch (regnum) {
  95   case E_D0_REGNUM:
  96     regcache->raw_supply (E_D0_REGNUM,
  97                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D0));
  98     break;
  99   case E_D1_REGNUM:
 100     regcache->raw_supply (E_D1_REGNUM,
 101                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D1));
 102     break;
 103   case E_D2_REGNUM:
 104     regcache->raw_supply (E_D2_REGNUM,
 105                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D2));
 106     break;
 107   case E_D3_REGNUM:
 108     regcache->raw_supply (E_D3_REGNUM,
 109                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D3));
 110     break;
 111   case E_A0_REGNUM:
 112     regcache->raw_supply (E_A0_REGNUM,
 113                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A0));
 114     break;
 115   case E_A1_REGNUM:
 116     regcache->raw_supply (E_A1_REGNUM,
 117                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A1));
 118     break;
 119   case E_A2_REGNUM:
 120     regcache->raw_supply (E_A2_REGNUM,
 121                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A2));
 122     break;
 123   case E_A3_REGNUM:
 124     regcache->raw_supply (E_A3_REGNUM,
 125                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A3));
 126     break;
 127   case E_SP_REGNUM:
 128     regcache->raw_supply (E_SP_REGNUM,
 129                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_SP));
 130     break;
 131   case E_PC_REGNUM:
 132     regcache->raw_supply (E_PC_REGNUM,
 133                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_PC));
 134     break;
 135   case E_MDR_REGNUM:
 136     regcache->raw_supply (E_MDR_REGNUM,
 137                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDR));
 138     break;
 139   case E_PSW_REGNUM:
 140     regcache->raw_supply (E_PSW_REGNUM,
 141                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_EPSW));
 142     break;
 143   case E_LIR_REGNUM:
 144     regcache->raw_supply (E_LIR_REGNUM,
 145                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LIR));
 146     break;
 147   case E_LAR_REGNUM:
 148     regcache->raw_supply (E_LAR_REGNUM,
 149                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LAR));
 150     break;
 151   case E_MDRQ_REGNUM:
 152     regcache->raw_supply (E_MDRQ_REGNUM,
 153                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ));
 154     break;
 155   case E_E0_REGNUM:
 156     regcache->raw_supply (E_E0_REGNUM,
 157                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E0));
 158     break;
 159   case E_E1_REGNUM:
 160     regcache->raw_supply (E_E1_REGNUM,
 161                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E1));
 162     break;
 163   case E_E2_REGNUM:
 164     regcache->raw_supply (E_E2_REGNUM,
 165                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E2));
 166     break;
 167   case E_E3_REGNUM:
 168     regcache->raw_supply (E_E3_REGNUM,
 169                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E3));
 170     break;
 171   case E_E4_REGNUM:
 172     regcache->raw_supply (E_E4_REGNUM,
 173                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E4));
 174     break;
 175   case E_E5_REGNUM:
 176     regcache->raw_supply (E_E5_REGNUM,
 177                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E5));
 178     break;
 179   case E_E6_REGNUM:
 180     regcache->raw_supply (E_E6_REGNUM,
 181                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E6));
 182     break;
 183   case E_E7_REGNUM:
 184     regcache->raw_supply (E_E7_REGNUM,
 185                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E7));
 186     break;
 187
 188     /* ssp, msp, and usp are inaccessible.  */
 189   case E_E8_REGNUM:
 190     regcache->raw_supply_zeroed (E_E8_REGNUM);
 191     break;
 192   case E_E9_REGNUM:
 193     regcache->raw_supply_zeroed (E_E9_REGNUM);
 194     break;
 195   case E_E10_REGNUM:
 196     regcache->raw_supply_zeroed (E_E10_REGNUM);
 197     break;
 198   case E_MCRH_REGNUM:
 199     regcache->raw_supply (E_MCRH_REGNUM,
 200                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRH));
 201     break;
 202   case E_MCRL_REGNUM:
 203     regcache->raw_supply (E_MCRL_REGNUM,
 204                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRL));
 205     break;
 206   case E_MCVF_REGNUM:
 207     regcache->raw_supply (E_MCVF_REGNUM,
 208                           (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCVF));
 209     break;
 210   case E_FPCR_REGNUM:
 211     /* FPCR is numbered among the GP regs, but handled as an FP reg.
 212        Do nothing.  */
 213     break;
 214   case E_FPCR_REGNUM + 1:
 215     /* The two unused registers beyond fpcr are inaccessible.  */
 216     regcache->raw_supply_zeroed (E_FPCR_REGNUM + 1);
 217     break;
 218   case E_FPCR_REGNUM + 2:
 219     regcache->raw_supply_zeroed (E_FPCR_REGNUM + 2);
 220     break;
 221   default:      /* An error, obviously, but should we error out?  */
 222     break;
 223   case -1:
 224     for (i = 0; i < MN10300_ELF_NGREG; i++)
 225       am33_supply_gregset_method (regset, regcache, i, gregs, len);
 226     break;
 227   }
 228   return;
 229 }
 230
 231 /* Copy fp register value of REGNUM from regset to regcache.
 232    If REGNUM is -1, do this for all fp registers in regset.  */
 233
 234 static void
 235 am33_supply_fpregset_method (const struct regset *regset,
 236                              struct regcache *regcache,
 237                              int regnum, const void *fpregs, size_t len)
 238 {
 239   const mn10300_elf_fpregset_t *fpregset
 240     = (const mn10300_elf_fpregset_t *) fpregs;
 241
 242   gdb_assert (len >= sizeof (mn10300_elf_fpregset_t));
 243
 244   if (regnum == -1)
 245     {
 246       int i;
 247
 248       for (i = 0; i < MN10300_ELF_NFPREG; i++)
 249         am33_supply_fpregset_method (regset, regcache,
 250                                      E_FS0_REGNUM + i, fpregs, len);
 251       am33_supply_fpregset_method (regset, regcache,
 252                                    E_FPCR_REGNUM, fpregs, len);
 253     }
 254   else if (regnum == E_FPCR_REGNUM)
 255     regcache->raw_supply (E_FPCR_REGNUM, &fpregset->fpcr);
 256   else if (E_FS0_REGNUM <= regnum
 257            && regnum < E_FS0_REGNUM + MN10300_ELF_NFPREG)
 258     regcache->raw_supply (regnum, &fpregset->fpregs[regnum - E_FS0_REGNUM]);
 259
 260   return;
 261 }
 262
 263 /* Copy register values from regcache to regset.  */
 264
 265 static void
 266 am33_collect_gregset_method (const struct regset *regset,
 267                              const struct regcache *regcache,
 268                              int regnum, void *gregs, size_t len)
 269 {
 270   mn10300_elf_gregset_t *regp = (gdb_byte (*)[28][4]) gregs;
 271   int i;
 272
 273   gdb_assert (len >= sizeof (mn10300_elf_gregset_t));
 274
 275   switch (regnum) {
 276   case E_D0_REGNUM:
 277     regcache->raw_collect (E_D0_REGNUM,
 278                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D0));
 279     break;
 280   case E_D1_REGNUM:
 281     regcache->raw_collect (E_D1_REGNUM,
 282                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D1));
 283     break;
 284   case E_D2_REGNUM:
 285     regcache->raw_collect (E_D2_REGNUM,
 286                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D2));
 287     break;
 288   case E_D3_REGNUM:
 289     regcache->raw_collect (E_D3_REGNUM,
 290                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_D3));
 291     break;
 292   case E_A0_REGNUM:
 293     regcache->raw_collect (E_A0_REGNUM,
 294                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A0));
 295     break;
 296   case E_A1_REGNUM:
 297     regcache->raw_collect (E_A1_REGNUM,
 298                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A1));
 299     break;
 300   case E_A2_REGNUM:
 301     regcache->raw_collect (E_A2_REGNUM,
 302                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A2));
 303     break;
 304   case E_A3_REGNUM:
 305     regcache->raw_collect (E_A3_REGNUM,
 306                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_A3));
 307     break;
 308   case E_SP_REGNUM:
 309     regcache->raw_collect (E_SP_REGNUM,
 310                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_SP));
 311     break;
 312   case E_PC_REGNUM:
 313     regcache->raw_collect (E_PC_REGNUM,
 314                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_PC));
 315     break;
 316   case E_MDR_REGNUM:
 317     regcache->raw_collect (E_MDR_REGNUM,
 318                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDR));
 319     break;
 320   case E_PSW_REGNUM:
 321     regcache->raw_collect (E_PSW_REGNUM,
 322                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_EPSW));
 323     break;
 324   case E_LIR_REGNUM:
 325     regcache->raw_collect (E_LIR_REGNUM,
 326                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LIR));
 327     break;
 328   case E_LAR_REGNUM:
 329     regcache->raw_collect (E_LAR_REGNUM,
 330                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_LAR));
 331     break;
 332   case E_MDRQ_REGNUM:
 333     regcache->raw_collect (E_MDRQ_REGNUM,
 334                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MDRQ));
 335     break;
 336   case E_E0_REGNUM:
 337     regcache->raw_collect (E_E0_REGNUM,
 338                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E0));
 339     break;
 340   case E_E1_REGNUM:
 341     regcache->raw_collect (E_E1_REGNUM,
 342                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E1));
 343     break;
 344   case E_E2_REGNUM:
 345     regcache->raw_collect (E_E2_REGNUM,
 346                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E2));
 347     break;
 348   case E_E3_REGNUM:
 349     regcache->raw_collect (E_E3_REGNUM,
 350                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E3));
 351     break;
 352   case E_E4_REGNUM:
 353     regcache->raw_collect (E_E4_REGNUM,
 354                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E4));
 355     break;
 356   case E_E5_REGNUM:
 357     regcache->raw_collect (E_E5_REGNUM,
 358                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E5));
 359     break;
 360   case E_E6_REGNUM:
 361     regcache->raw_collect (E_E6_REGNUM,
 362                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E6));
 363     break;
 364   case E_E7_REGNUM:
 365     regcache->raw_collect (E_E7_REGNUM,
 366                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_E7));
 367     break;
 368
 369     /* ssp, msp, and usp are inaccessible.  */
 370   case E_E8_REGNUM:
 371     /* The gregset struct has noplace to put this: do nothing.  */
 372     break;
 373   case E_E9_REGNUM:
 374     /* The gregset struct has noplace to put this: do nothing.  */
 375     break;
 376   case E_E10_REGNUM:
 377     /* The gregset struct has noplace to put this: do nothing.  */
 378     break;
 379   case E_MCRH_REGNUM:
 380     regcache->raw_collect (E_MCRH_REGNUM,
 381                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRH));
 382     break;
 383   case E_MCRL_REGNUM:
 384     regcache->raw_collect (E_MCRL_REGNUM,
 385                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCRL));
 386     break;
 387   case E_MCVF_REGNUM:
 388     regcache->raw_collect (E_MCVF_REGNUM,
 389                            (regp + MN10300_ELF_GREGSET_T_REG_INDEX_MCVF));
 390     break;
 391   case E_FPCR_REGNUM:
 392     /* FPCR is numbered among the GP regs, but handled as an FP reg.
 393        Do nothing.  */
 394     break;
 395   case E_FPCR_REGNUM + 1:
 396     /* The gregset struct has noplace to put this: do nothing.  */
 397     break;
 398   case E_FPCR_REGNUM + 2:
 399     /* The gregset struct has noplace to put this: do nothing.  */
 400     break;
 401   default:      /* An error, obviously, but should we error out?  */
 402     break;
 403   case -1:
 404     for (i = 0; i < MN10300_ELF_NGREG; i++)
 405       am33_collect_gregset_method (regset, regcache, i, gregs, len);
 406     break;
 407   }
 408   return;
 409 }
 410
 411 /* Copy fp register values from regcache to regset.  */
 412
 413 static void
 414 am33_collect_fpregset_method (const struct regset *regset,
 415                               const struct regcache *regcache,
 416                               int regnum, void *fpregs, size_t len)
 417 {
 418   mn10300_elf_fpregset_t *fpregset = (mn10300_elf_fpregset_t *) fpregs;
 419
 420   gdb_assert (len >= sizeof (mn10300_elf_fpregset_t));
 421
 422   if (regnum == -1)
 423     {
 424       int i;
 425       for (i = 0; i < MN10300_ELF_NFPREG; i++)
 426         am33_collect_fpregset_method (regset, regcache, E_FS0_REGNUM + i,
 427                                       fpregs, len);
 428       am33_collect_fpregset_method (regset, regcache,
 429                                     E_FPCR_REGNUM, fpregs, len);
 430     }
 431   else if (regnum == E_FPCR_REGNUM)
 432     regcache->raw_collect (E_FPCR_REGNUM, &fpregset->fpcr);
 433   else if (E_FS0_REGNUM <= regnum
 434            && regnum < E_FS0_REGNUM + MN10300_ELF_NFPREG)
 435     regcache->raw_collect (regnum, &fpregset->fpregs[regnum - E_FS0_REGNUM]);
 436
 437   return;
 438 }
 439
 440 static const struct regset am33_gregset =
 441   {
 442     NULL, am33_supply_gregset_method, am33_collect_gregset_method
 443   };
 444
 445 static const struct regset am33_fpregset =
 446   {
 447     NULL, am33_supply_fpregset_method, am33_collect_fpregset_method
 448   };
 449
 450 /* Iterate over core file register note sections.  */
 451
 452 static void
 453 am33_iterate_over_regset_sections (struct gdbarch *gdbarch,
 454                                    iterate_over_regset_sections_cb *cb,
 455                                    void *cb_data,
 456                                    const struct regcache *regcache)
 457 {
 458   cb (".reg", sizeof (mn10300_elf_gregset_t), sizeof (mn10300_elf_gregset_t),
 459       &am33_gregset, NULL, cb_data);
 460   cb (".reg2", sizeof (mn10300_elf_fpregset_t), sizeof (mn10300_elf_fpregset_t),
 461       &am33_fpregset, NULL, cb_data);
 462 }
 463 \f
 464 static void
 465 am33_linux_sigframe_cache_init (const struct tramp_frame *self,
 466                                 const frame_info_ptr &this_frame,
 467                                 struct trad_frame_cache *this_cache,
 468                                 CORE_ADDR func);
 469
 470 static const struct tramp_frame am33_linux_sigframe = {
 471   SIGTRAMP_FRAME,
 472   1,
 473   {
 474     /* mov     119,d0 */
 475     { 0x2c, ULONGEST_MAX },
 476     { 0x77, ULONGEST_MAX },
 477     { 0x00, ULONGEST_MAX },
 478     /* syscall 0 */
 479     { 0xf0, ULONGEST_MAX },
 480     { 0xe0, ULONGEST_MAX },
 481     { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
 482   },
 483   am33_linux_sigframe_cache_init
 484 };
 485
 486 static const struct tramp_frame am33_linux_rt_sigframe = {
 487   SIGTRAMP_FRAME,
 488   1,
 489   {
 490     /* mov     173,d0 */
 491     { 0x2c, ULONGEST_MAX },
 492     { 0xad, ULONGEST_MAX },
 493     { 0x00, ULONGEST_MAX },
 494     /* syscall 0 */
 495     { 0xf0, ULONGEST_MAX },
 496     { 0xe0, ULONGEST_MAX },
 497     { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
 498   },
 499   am33_linux_sigframe_cache_init
 500 };
 501
 502 /* Relevant struct definitions for signal handling...
 503
 504 From arch/mn10300/kernel/sigframe.h:
 505
 506 struct sigframe
 507 {
 508         void (*pretcode)(void);
 509         int sig;
 510         struct sigcontext *psc;
 511         struct sigcontext sc;
 512         struct fpucontext fpuctx;
 513         unsigned long extramask[_NSIG_WORDS-1];
 514         char retcode[8];
 515 };
 516
 517 struct rt_sigframe
 518 {
 519         void (*pretcode)(void);
 520         int sig;
 521         struct siginfo *pinfo;
 522         void *puc;
 523         struct siginfo info;
 524         struct ucontext uc;
 525         struct fpucontext fpuctx;
 526         char retcode[8];
 527 };
 528
 529 From include/asm-mn10300/ucontext.h:
 530
 531 struct ucontext {
 532         unsigned long     uc_flags;
 533         struct ucontext  *uc_link;
 534         stack_t           uc_stack;
 535         struct sigcontext uc_mcontext;
 536         sigset_t          uc_sigmask;
 537 };
 538
 539 From include/asm-mn10300/sigcontext.h:
 540
 541 struct fpucontext {
 542         unsigned long   fs[32];
 543         unsigned long   fpcr;
 544 };
 545
 546 struct sigcontext {
 547         unsigned long   d0;
 548         unsigned long   d1;
 549         unsigned long   d2;
 550         unsigned long   d3;
 551         unsigned long   a0;
 552         unsigned long   a1;
 553         unsigned long   a2;
 554         unsigned long   a3;
 555         unsigned long   e0;
 556         unsigned long   e1;
 557         unsigned long   e2;
 558         unsigned long   e3;
 559         unsigned long   e4;
 560         unsigned long   e5;
 561         unsigned long   e6;
 562         unsigned long   e7;
 563         unsigned long   lar;
 564         unsigned long   lir;
 565         unsigned long   mdr;
 566         unsigned long   mcvf;
 567         unsigned long   mcrl;
 568         unsigned long   mcrh;
 569         unsigned long   mdrq;
 570         unsigned long   sp;
 571         unsigned long   epsw;
 572         unsigned long   pc;
 573         struct fpucontext *fpucontext;
 574         unsigned long   oldmask;
 575 }; */
 576
 577
 578 #define AM33_SIGCONTEXT_D0 0
 579 #define AM33_SIGCONTEXT_D1 4
 580 #define AM33_SIGCONTEXT_D2 8
 581 #define AM33_SIGCONTEXT_D3 12
 582 #define AM33_SIGCONTEXT_A0 16
 583 #define AM33_SIGCONTEXT_A1 20
 584 #define AM33_SIGCONTEXT_A2 24
 585 #define AM33_SIGCONTEXT_A3 28
 586 #define AM33_SIGCONTEXT_E0 32
 587 #define AM33_SIGCONTEXT_E1 36
 588 #define AM33_SIGCONTEXT_E2 40
 589 #define AM33_SIGCONTEXT_E3 44
 590 #define AM33_SIGCONTEXT_E4 48
 591 #define AM33_SIGCONTEXT_E5 52
 592 #define AM33_SIGCONTEXT_E6 56
 593 #define AM33_SIGCONTEXT_E7 60
 594 #define AM33_SIGCONTEXT_LAR 64
 595 #define AM33_SIGCONTEXT_LIR 68
 596 #define AM33_SIGCONTEXT_MDR 72
 597 #define AM33_SIGCONTEXT_MCVF 76
 598 #define AM33_SIGCONTEXT_MCRL 80
 599 #define AM33_SIGCONTEXT_MCRH 84
 600 #define AM33_SIGCONTEXT_MDRQ 88
 601 #define AM33_SIGCONTEXT_SP 92
 602 #define AM33_SIGCONTEXT_EPSW 96
 603 #define AM33_SIGCONTEXT_PC 100
 604 #define AM33_SIGCONTEXT_FPUCONTEXT 104
 605
 606
 607 static void
 608 am33_linux_sigframe_cache_init (const struct tramp_frame *self,
 609                                 const frame_info_ptr &this_frame,
 610                                 struct trad_frame_cache *this_cache,
 611                                 CORE_ADDR func)
 612 {
 613   CORE_ADDR sc_base, fpubase;
 614   int i;
 615
 616   sc_base = get_frame_register_unsigned (this_frame, E_SP_REGNUM);
 617   if (self == &am33_linux_sigframe)
 618     {
 619       sc_base += 8;
 620       sc_base = get_frame_memory_unsigned (this_frame, sc_base, 4);
 621     }
 622   else
 623     {
 624       sc_base += 12;
 625       sc_base = get_frame_memory_unsigned (this_frame, sc_base, 4);
 626       sc_base += 20;
 627     }
 628
 629   trad_frame_set_reg_addr (this_cache, E_D0_REGNUM,
 630                            sc_base + AM33_SIGCONTEXT_D0);
 631   trad_frame_set_reg_addr (this_cache, E_D1_REGNUM,
 632                            sc_base + AM33_SIGCONTEXT_D1);
 633   trad_frame_set_reg_addr (this_cache, E_D2_REGNUM,
 634                            sc_base + AM33_SIGCONTEXT_D2);
 635   trad_frame_set_reg_addr (this_cache, E_D3_REGNUM,
 636                            sc_base + AM33_SIGCONTEXT_D3);
 637
 638   trad_frame_set_reg_addr (this_cache, E_A0_REGNUM,
 639                            sc_base + AM33_SIGCONTEXT_A0);
 640   trad_frame_set_reg_addr (this_cache, E_A1_REGNUM,
 641                            sc_base + AM33_SIGCONTEXT_A1);
 642   trad_frame_set_reg_addr (this_cache, E_A2_REGNUM,
 643                            sc_base + AM33_SIGCONTEXT_A2);
 644   trad_frame_set_reg_addr (this_cache, E_A3_REGNUM,
 645                            sc_base + AM33_SIGCONTEXT_A3);
 646
 647   trad_frame_set_reg_addr (this_cache, E_E0_REGNUM,
 648                            sc_base + AM33_SIGCONTEXT_E0);
 649   trad_frame_set_reg_addr (this_cache, E_E1_REGNUM,
 650                            sc_base + AM33_SIGCONTEXT_E1);
 651   trad_frame_set_reg_addr (this_cache, E_E2_REGNUM,
 652                            sc_base + AM33_SIGCONTEXT_E2);
 653   trad_frame_set_reg_addr (this_cache, E_E3_REGNUM,
 654                            sc_base + AM33_SIGCONTEXT_E3);
 655   trad_frame_set_reg_addr (this_cache, E_E4_REGNUM,
 656                            sc_base + AM33_SIGCONTEXT_E4);
 657   trad_frame_set_reg_addr (this_cache, E_E5_REGNUM,
 658                            sc_base + AM33_SIGCONTEXT_E5);
 659   trad_frame_set_reg_addr (this_cache, E_E6_REGNUM,
 660                            sc_base + AM33_SIGCONTEXT_E6);
 661   trad_frame_set_reg_addr (this_cache, E_E7_REGNUM,
 662                            sc_base + AM33_SIGCONTEXT_E7);
 663
 664   trad_frame_set_reg_addr (this_cache, E_LAR_REGNUM,
 665                            sc_base + AM33_SIGCONTEXT_LAR);
 666   trad_frame_set_reg_addr (this_cache, E_LIR_REGNUM,
 667                            sc_base + AM33_SIGCONTEXT_LIR);
 668   trad_frame_set_reg_addr (this_cache, E_MDR_REGNUM,
 669                            sc_base + AM33_SIGCONTEXT_MDR);
 670   trad_frame_set_reg_addr (this_cache, E_MCVF_REGNUM,
 671                            sc_base + AM33_SIGCONTEXT_MCVF);
 672   trad_frame_set_reg_addr (this_cache, E_MCRL_REGNUM,
 673                            sc_base + AM33_SIGCONTEXT_MCRL);
 674   trad_frame_set_reg_addr (this_cache, E_MDRQ_REGNUM,
 675                            sc_base + AM33_SIGCONTEXT_MDRQ);
 676
 677   trad_frame_set_reg_addr (this_cache, E_SP_REGNUM,
 678                            sc_base + AM33_SIGCONTEXT_SP);
 679   trad_frame_set_reg_addr (this_cache, E_PSW_REGNUM,
 680                            sc_base + AM33_SIGCONTEXT_EPSW);
 681   trad_frame_set_reg_addr (this_cache, E_PC_REGNUM,
 682                            sc_base + AM33_SIGCONTEXT_PC);
 683
 684   fpubase = get_frame_memory_unsigned (this_frame,
 685                                        sc_base + AM33_SIGCONTEXT_FPUCONTEXT,
 686                                        4);
 687   if (fpubase)
 688     {
 689       for (i = 0; i < 32; i++)
 690         {
 691           trad_frame_set_reg_addr (this_cache, E_FS0_REGNUM + i,
 692                                    fpubase + 4 * i);
 693         }
 694       trad_frame_set_reg_addr (this_cache, E_FPCR_REGNUM, fpubase + 4 * 32);
 695     }
 696
 697   trad_frame_set_id (this_cache, frame_id_build (sc_base, func));
 698 }
 699 \f
 700 /* AM33 GNU/Linux osabi has been recognized.
 701    Now's our chance to register our corefile handling.  */
 702
 703 static void
 704 am33_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch)
 705 {
 706   linux_init_abi (info, gdbarch, 0);
 707
 708   set_gdbarch_iterate_over_regset_sections
 709     (gdbarch, am33_iterate_over_regset_sections);
 710   set_solib_svr4_fetch_link_map_offsets
 711     (gdbarch, linux_ilp32_fetch_link_map_offsets);
 712
 713   tramp_frame_prepend_unwinder (gdbarch, &am33_linux_sigframe);
 714   tramp_frame_prepend_unwinder (gdbarch, &am33_linux_rt_sigframe);
 715 }
 716
 717 void _initialize_mn10300_linux_tdep ();
 718 void
 719 _initialize_mn10300_linux_tdep ()
 720 {
 721   gdbarch_register_osabi (bfd_arch_mn10300, 0,
 722                           GDB_OSABI_LINUX, am33_linux_init_osabi);
 723 }
 724