gdb/ppc-tdep.h

   1 /* Target-dependent code for GDB, the GNU debugger.
   2
   3    Copyright (C) 2000-2014 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 #ifndef PPC_TDEP_H
  21 #define PPC_TDEP_H
  22
  23 struct gdbarch;
  24 struct frame_info;
  25 struct value;
  26 struct regcache;
  27 struct type;
  28
  29 /* From ppc-sysv-tdep.c ...  */
  30 enum return_value_convention ppc_sysv_abi_return_value (struct gdbarch *gdbarch,
  31                                                         struct value *function,
  32                                                         struct type *valtype,
  33                                                         struct regcache *regcache,
  34                                                         gdb_byte *readbuf,
  35                                                         const gdb_byte *writebuf);
  36 enum return_value_convention ppc_sysv_abi_broken_return_value (struct gdbarch *gdbarch,
  37                                                                struct value *function,
  38                                                                struct type *valtype,
  39                                                                struct regcache *regcache,
  40                                                                gdb_byte *readbuf,
  41                                                                const gdb_byte *writebuf);
  42 CORE_ADDR ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
  43                                         struct value *function,
  44                                         struct regcache *regcache,
  45                                         CORE_ADDR bp_addr, int nargs,
  46                                         struct value **args, CORE_ADDR sp,
  47                                         int struct_return,
  48                                         CORE_ADDR struct_addr);
  49 CORE_ADDR ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
  50                                           struct value *function,
  51                                           struct regcache *regcache,
  52                                           CORE_ADDR bp_addr, int nargs,
  53                                           struct value **args, CORE_ADDR sp,
  54                                           int struct_return,
  55                                           CORE_ADDR struct_addr);
  56 enum return_value_convention ppc64_sysv_abi_return_value (struct gdbarch *gdbarch,
  57                                                           struct value *function,
  58                                                           struct type *valtype,
  59                                                           struct regcache *regcache,
  60                                                           gdb_byte *readbuf,
  61                                                           const gdb_byte *writebuf);
  62
  63 /* From rs6000-tdep.c...  */
  64 int altivec_register_p (struct gdbarch *gdbarch, int regno);
  65 int vsx_register_p (struct gdbarch *gdbarch, int regno);
  66 int spe_register_p (struct gdbarch *gdbarch, int regno);
  67
  68 /* Return non-zero if the architecture described by GDBARCH has
  69    floating-point registers (f0 --- f31 and fpscr).  */
  70 int ppc_floating_point_unit_p (struct gdbarch *gdbarch);
  71
  72 /* Return non-zero if the architecture described by GDBARCH has
  73    Altivec registers (vr0 --- vr31, vrsave and vscr).  */
  74 int ppc_altivec_support_p (struct gdbarch *gdbarch);
  75
  76 /* Return non-zero if the architecture described by GDBARCH has
  77    VSX registers (vsr0 --- vsr63).  */
  78 int vsx_support_p (struct gdbarch *gdbarch);
  79 int ppc_deal_with_atomic_sequence (struct frame_info *frame);
  80
  81
  82 /* Register set description.  */
  83
  84 struct ppc_reg_offsets
  85 {
  86   /* General-purpose registers.  */
  87   int r0_offset;
  88   int gpr_size; /* size for r0-31, pc, ps, lr, ctr.  */
  89   int xr_size;  /* size for cr, xer, mq.  */
  90   int pc_offset;
  91   int ps_offset;
  92   int cr_offset;
  93   int lr_offset;
  94   int ctr_offset;
  95   int xer_offset;
  96   int mq_offset;
  97
  98   /* Floating-point registers.  */
  99   int f0_offset;
 100   int fpscr_offset;
 101   int fpscr_size;
 102
 103   /* AltiVec registers.  */
 104   int vr0_offset;
 105   int vscr_offset;
 106   int vrsave_offset;
 107 };
 108
 109 extern void ppc_supply_reg (struct regcache *regcache, int regnum,
 110                             const gdb_byte *regs, size_t offset, int regsize);
 111
 112 extern void ppc_collect_reg (const struct regcache *regcache, int regnum,
 113                              gdb_byte *regs, size_t offset, int regsize);
 114
 115 /* Supply register REGNUM in the general-purpose register set REGSET
 116    from the buffer specified by GREGS and LEN to register cache
 117    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 118
 119 extern void ppc_supply_gregset (const struct regset *regset,
 120                                 struct regcache *regcache,
 121                                 int regnum, const void *gregs, size_t len);
 122
 123 /* Supply register REGNUM in the floating-point register set REGSET
 124    from the buffer specified by FPREGS and LEN to register cache
 125    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 126
 127 extern void ppc_supply_fpregset (const struct regset *regset,
 128                                  struct regcache *regcache,
 129                                  int regnum, const void *fpregs, size_t len);
 130
 131 /* Supply register REGNUM in the Altivec register set REGSET
 132    from the buffer specified by VRREGS and LEN to register cache
 133    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 134
 135 extern void ppc_supply_vrregset (const struct regset *regset,
 136                                  struct regcache *regcache,
 137                                  int regnum, const void *vrregs, size_t len);
 138
 139 /* Supply register REGNUM in the VSX register set REGSET
 140    from the buffer specified by VSXREGS and LEN to register cache
 141    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 142
 143 extern void ppc_supply_vsxregset (const struct regset *regset,
 144                                  struct regcache *regcache,
 145                                  int regnum, const void *vsxregs, size_t len);
 146
 147 /* Collect register REGNUM in the general-purpose register set
 148    REGSET, from register cache REGCACHE into the buffer specified by
 149    GREGS and LEN.  If REGNUM is -1, do this for all registers in
 150    REGSET.  */
 151
 152 extern void ppc_collect_gregset (const struct regset *regset,
 153                                  const struct regcache *regcache,
 154                                  int regnum, void *gregs, size_t len);
 155
 156 /* Collect register REGNUM in the floating-point register set
 157    REGSET, from register cache REGCACHE into the buffer specified by
 158    FPREGS and LEN.  If REGNUM is -1, do this for all registers in
 159    REGSET.  */
 160
 161 extern void ppc_collect_fpregset (const struct regset *regset,
 162                                   const struct regcache *regcache,
 163                                   int regnum, void *fpregs, size_t len);
 164
 165 /* Collect register REGNUM in the Altivec register set
 166    REGSET from register cache REGCACHE into the buffer specified by
 167    VRREGS and LEN.  If REGNUM is -1, do this for all registers in
 168    REGSET.  */
 169
 170 extern void ppc_collect_vrregset (const struct regset *regset,
 171                                   const struct regcache *regcache,
 172                                   int regnum, void *vrregs, size_t len);
 173
 174 /* Collect register REGNUM in the VSX register set
 175    REGSET from register cache REGCACHE into the buffer specified by
 176    VSXREGS and LEN.  If REGNUM is -1, do this for all registers in
 177    REGSET.  */
 178
 179 extern void ppc_collect_vsxregset (const struct regset *regset,
 180                                   const struct regcache *regcache,
 181                                   int regnum, void *vsxregs, size_t len);
 182
 183 /* Private data that this module attaches to struct gdbarch.  */
 184
 185 /* Vector ABI used by the inferior.  */
 186 enum powerpc_vector_abi
 187 {
 188   POWERPC_VEC_AUTO,
 189   POWERPC_VEC_GENERIC,
 190   POWERPC_VEC_ALTIVEC,
 191   POWERPC_VEC_SPE,
 192   POWERPC_VEC_LAST
 193 };
 194
 195 struct gdbarch_tdep
 196   {
 197     int wordsize;               /* Size in bytes of fixed-point word.  */
 198     int soft_float;             /* Avoid FP registers for arguments?  */
 199
 200     /* How to pass vector arguments.  Never set to AUTO or LAST.  */
 201     enum powerpc_vector_abi vector_abi;
 202
 203     int ppc_gp0_regnum;         /* GPR register 0 */
 204     int ppc_toc_regnum;         /* TOC register */
 205     int ppc_ps_regnum;          /* Processor (or machine) status (%msr) */
 206     int ppc_cr_regnum;          /* Condition register */
 207     int ppc_lr_regnum;          /* Link register */
 208     int ppc_ctr_regnum;         /* Count register */
 209     int ppc_xer_regnum;         /* Integer exception register */
 210
 211     /* Not all PPC and RS6000 variants will have the registers
 212        represented below.  A -1 is used to indicate that the register
 213        is not present in this variant.  */
 214
 215     /* Floating-point registers.  */
 216     int ppc_fp0_regnum;         /* Floating-point register 0.  */
 217     int ppc_fpscr_regnum;       /* fp status and condition register.  */
 218
 219     /* Multiplier-Quotient Register (older POWER architectures only).  */
 220     int ppc_mq_regnum;
 221
 222     /* POWER7 VSX registers.  */
 223     int ppc_vsr0_regnum;        /* First VSX register.  */
 224     int ppc_vsr0_upper_regnum;  /* First right most dword vsx register.  */
 225     int ppc_efpr0_regnum;       /* First Extended FP register.  */
 226
 227     /* Altivec registers.  */
 228     int ppc_vr0_regnum;         /* First AltiVec register.  */
 229     int ppc_vrsave_regnum;      /* Last AltiVec register.  */
 230
 231     /* SPE registers.  */
 232     int ppc_ev0_upper_regnum;   /* First GPR upper half register.  */
 233     int ppc_ev0_regnum;         /* First ev register.  */
 234     int ppc_acc_regnum;         /* SPE 'acc' register.  */
 235     int ppc_spefscr_regnum;     /* SPE 'spefscr' register.  */
 236
 237     /* Decimal 128 registers.  */
 238     int ppc_dl0_regnum;         /* First Decimal128 argument register pair.  */
 239
 240     /* Offset to ABI specific location where link register is saved.  */
 241     int lr_frame_offset;
 242
 243     /* An array of integers, such that sim_regno[I] is the simulator
 244        register number for GDB register number I, or -1 if the
 245        simulator does not implement that register.  */
 246     int *sim_regno;
 247
 248     /* ISA-specific types.  */
 249     struct type *ppc_builtin_type_vec64;
 250     struct type *ppc_builtin_type_vec128;
 251 };
 252
 253
 254 /* Constants for register set sizes.  */
 255 enum
 256   {
 257     ppc_num_gprs = 32,          /* 32 general-purpose registers.  */
 258     ppc_num_fprs = 32,          /* 32 floating-point registers.  */
 259     ppc_num_srs = 16,           /* 16 segment registers.  */
 260     ppc_num_vrs = 32,           /* 32 Altivec vector registers.  */
 261     ppc_num_vshrs = 32,         /* 32 doublewords (dword 1 of vs0~vs31).  */
 262     ppc_num_vsrs = 64,          /* 64 VSX vector registers.  */
 263     ppc_num_efprs = 32          /* 32 Extended FP registers.  */
 264   };
 265
 266
 267 /* Register number constants.  These are GDB internal register
 268    numbers; they are not used for the simulator or remote targets.
 269    Extra SPRs (those other than MQ, CTR, LR, XER, SPEFSCR) are given
 270    numbers above PPC_NUM_REGS.  So are segment registers and other
 271    target-defined registers.  */
 272 enum {
 273   PPC_R0_REGNUM = 0,
 274   PPC_F0_REGNUM = 32,
 275   PPC_PC_REGNUM = 64,
 276   PPC_MSR_REGNUM = 65,
 277   PPC_CR_REGNUM = 66,
 278   PPC_LR_REGNUM = 67,
 279   PPC_CTR_REGNUM = 68,
 280   PPC_XER_REGNUM = 69,
 281   PPC_FPSCR_REGNUM = 70,
 282   PPC_MQ_REGNUM = 71,
 283   PPC_SPE_UPPER_GP0_REGNUM = 72,
 284   PPC_SPE_ACC_REGNUM = 104,
 285   PPC_SPE_FSCR_REGNUM = 105,
 286   PPC_VR0_REGNUM = 106,
 287   PPC_VSCR_REGNUM = 138,
 288   PPC_VRSAVE_REGNUM = 139,
 289   PPC_VSR0_UPPER_REGNUM = 140,
 290   PPC_VSR31_UPPER_REGNUM = 171,
 291   PPC_NUM_REGS
 292 };
 293
 294 /* An instruction to match.  */
 295
 296 struct ppc_insn_pattern
 297 {
 298   unsigned int mask;            /* mask the insn with this...  */
 299   unsigned int data;            /* ...and see if it matches this.  */
 300   int optional;                 /* If non-zero, this insn may be absent.  */
 301 };
 302
 303 extern int ppc_insns_match_pattern (struct frame_info *frame, CORE_ADDR pc,
 304                                     struct ppc_insn_pattern *pattern,
 305                                     unsigned int *insns);
 306 extern CORE_ADDR ppc_insn_d_field (unsigned int insn);
 307
 308 extern CORE_ADDR ppc_insn_ds_field (unsigned int insn);
 309
 310 /* Instruction size.  */
 311 #define PPC_INSN_SIZE 4
 312
 313 /* Estimate for the maximum number of instrctions in a function epilogue.  */
 314 #define PPC_MAX_EPILOGUE_INSTRUCTIONS  52
 315
 316 #endif /* ppc-tdep.h */