gdb/ppc-tdep.h

   1 /* Target-dependent code for GDB, the GNU debugger.
   2
   3    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef PPC_TDEP_H
  22 #define PPC_TDEP_H
  23
  24 struct gdbarch;
  25 struct frame_info;
  26 struct value;
  27 struct regcache;
  28 struct type;
  29
  30 /* From ppc-linux-tdep.c... */
  31 enum return_value_convention ppc_sysv_abi_return_value (struct gdbarch *gdbarch,
  32                                                         struct type *func_type,
  33                                                         struct type *valtype,
  34                                                         struct regcache *regcache,
  35                                                         gdb_byte *readbuf,
  36                                                         const gdb_byte *writebuf);
  37 enum return_value_convention ppc_sysv_abi_broken_return_value (struct gdbarch *gdbarch,
  38                                                                struct type *func_type,
  39                                                                struct type *valtype,
  40                                                                struct regcache *regcache,
  41                                                                gdb_byte *readbuf,
  42                                                                const gdb_byte *writebuf);
  43 CORE_ADDR ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
  44                                         struct value *function,
  45                                         struct regcache *regcache,
  46                                         CORE_ADDR bp_addr, int nargs,
  47                                         struct value **args, CORE_ADDR sp,
  48                                         int struct_return,
  49                                         CORE_ADDR struct_addr);
  50 CORE_ADDR ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
  51                                           struct value *function,
  52                                           struct regcache *regcache,
  53                                           CORE_ADDR bp_addr, int nargs,
  54                                           struct value **args, CORE_ADDR sp,
  55                                           int struct_return,
  56                                           CORE_ADDR struct_addr);
  57 CORE_ADDR ppc64_sysv_abi_adjust_breakpoint_address (struct gdbarch *gdbarch,
  58                                                     CORE_ADDR bpaddr);
  59 int ppc_linux_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
  60 struct link_map_offsets *ppc_linux_svr4_fetch_link_map_offsets (void);
  61 const struct regset *ppc_linux_gregset (int);
  62 const struct regset *ppc_linux_fpregset (void);
  63
  64 enum return_value_convention ppc64_sysv_abi_return_value (struct gdbarch *gdbarch,
  65                                                           struct type *func_type,
  66                                                           struct type *valtype,
  67                                                           struct regcache *regcache,
  68                                                           gdb_byte *readbuf,
  69                                                           const gdb_byte *writebuf);
  70
  71 /* From rs6000-tdep.c... */
  72 int altivec_register_p (struct gdbarch *gdbarch, int regno);
  73 int spe_register_p (struct gdbarch *gdbarch, int regno);
  74
  75 /* Return non-zero if the architecture described by GDBARCH has
  76    floating-point registers (f0 --- f31 and fpscr).  */
  77 int ppc_floating_point_unit_p (struct gdbarch *gdbarch);
  78
  79 /* Return non-zero if the architecture described by GDBARCH has
  80    Altivec registers (vr0 --- vr31, vrsave and vscr).  */
  81 int ppc_altivec_support_p (struct gdbarch *gdbarch);
  82
  83 /* Register set description.  */
  84
  85 struct ppc_reg_offsets
  86 {
  87   /* General-purpose registers.  */
  88   int r0_offset;
  89   int gpr_size; /* size for r0-31, pc, ps, lr, ctr.  */
  90   int xr_size;  /* size for cr, xer, mq.  */
  91   int pc_offset;
  92   int ps_offset;
  93   int cr_offset;
  94   int lr_offset;
  95   int ctr_offset;
  96   int xer_offset;
  97   int mq_offset;
  98
  99   /* Floating-point registers.  */
 100   int f0_offset;
 101   int fpscr_offset;
 102   int fpscr_size;
 103
 104   /* AltiVec registers.  */
 105   int vr0_offset;
 106   int vscr_offset;
 107   int vrsave_offset;
 108 };
 109
 110 /* Supply register REGNUM in the general-purpose register set REGSET
 111    from the buffer specified by GREGS and LEN to register cache
 112    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 113
 114 extern void ppc_supply_gregset (const struct regset *regset,
 115                                 struct regcache *regcache,
 116                                 int regnum, const void *gregs, size_t len);
 117
 118 /* Supply register REGNUM in the floating-point register set REGSET
 119    from the buffer specified by FPREGS and LEN to register cache
 120    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 121
 122 extern void ppc_supply_fpregset (const struct regset *regset,
 123                                  struct regcache *regcache,
 124                                  int regnum, const void *fpregs, size_t len);
 125
 126 /* Supply register REGNUM in the Altivec register set REGSET
 127    from the buffer specified by VRREGS and LEN to register cache
 128    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 129
 130 extern void ppc_supply_vrregset (const struct regset *regset,
 131                                  struct regcache *regcache,
 132                                  int regnum, const void *vrregs, size_t len);
 133
 134 /* Collect register REGNUM in the general-purpose register set
 135    REGSET. from register cache REGCACHE into the buffer specified by
 136    GREGS and LEN.  If REGNUM is -1, do this for all registers in
 137    REGSET.  */
 138
 139 extern void ppc_collect_gregset (const struct regset *regset,
 140                                  const struct regcache *regcache,
 141                                  int regnum, void *gregs, size_t len);
 142
 143 /* Collect register REGNUM in the floating-point register set
 144    REGSET. from register cache REGCACHE into the buffer specified by
 145    FPREGS and LEN.  If REGNUM is -1, do this for all registers in
 146    REGSET.  */
 147
 148 extern void ppc_collect_fpregset (const struct regset *regset,
 149                                   const struct regcache *regcache,
 150                                   int regnum, void *fpregs, size_t len);
 151
 152 /* Collect register REGNUM in the Altivec register set
 153    REGSET from register cache REGCACHE into the buffer specified by
 154    VRREGS and LEN.  If REGNUM is -1, do this for all registers in
 155    REGSET.  */
 156
 157 extern void ppc_collect_vrregset (const struct regset *regset,
 158                                   const struct regcache *regcache,
 159                                   int regnum, void *vrregs, size_t len);
 160
 161 /* Private data that this module attaches to struct gdbarch. */
 162
 163 /* Vector ABI used by the inferior.  */
 164 enum powerpc_vector_abi
 165 {
 166   POWERPC_VEC_AUTO,
 167   POWERPC_VEC_GENERIC,
 168   POWERPC_VEC_ALTIVEC,
 169   POWERPC_VEC_SPE,
 170   POWERPC_VEC_LAST
 171 };
 172
 173 struct gdbarch_tdep
 174   {
 175     int wordsize;               /* Size in bytes of fixed-point word.  */
 176     int soft_float;             /* Avoid FP registers for arguments?  */
 177
 178     /* How to pass vector arguments.  Never set to AUTO or LAST.  */
 179     enum powerpc_vector_abi vector_abi;
 180
 181     int ppc_gp0_regnum;         /* GPR register 0 */
 182     int ppc_toc_regnum;         /* TOC register */
 183     int ppc_ps_regnum;          /* Processor (or machine) status (%msr) */
 184     int ppc_cr_regnum;          /* Condition register */
 185     int ppc_lr_regnum;          /* Link register */
 186     int ppc_ctr_regnum;         /* Count register */
 187     int ppc_xer_regnum;         /* Integer exception register */
 188
 189     /* Not all PPC and RS6000 variants will have the registers
 190        represented below.  A -1 is used to indicate that the register
 191        is not present in this variant.  */
 192
 193     /* Floating-point registers.  */
 194     int ppc_fp0_regnum;         /* floating-point register 0 */
 195     int ppc_fpscr_regnum;       /* fp status and condition register */
 196
 197     /* Multiplier-Quotient Register (older POWER architectures only).  */
 198     int ppc_mq_regnum;
 199
 200     /* Altivec registers.  */
 201     int ppc_vr0_regnum;         /* First AltiVec register */
 202     int ppc_vrsave_regnum;      /* Last AltiVec register */
 203
 204     /* SPE registers.  */
 205     int ppc_ev0_upper_regnum;   /* First GPR upper half register */
 206     int ppc_ev0_regnum;         /* First ev register */
 207     int ppc_acc_regnum;         /* SPE 'acc' register */
 208     int ppc_spefscr_regnum;     /* SPE 'spefscr' register */
 209
 210     /* Decimal 128 registers.  */
 211     int ppc_dl0_regnum;         /* First Decimal128 argument register pair.  */
 212
 213     /* Offset to ABI specific location where link register is saved.  */
 214     int lr_frame_offset;
 215
 216     /* An array of integers, such that sim_regno[I] is the simulator
 217        register number for GDB register number I, or -1 if the
 218        simulator does not implement that register.  */
 219     int *sim_regno;
 220
 221     /* Minimum possible text address.  */
 222     CORE_ADDR text_segment_base;
 223
 224     /* ISA-specific types.  */
 225     struct type *ppc_builtin_type_vec64;
 226 };
 227
 228
 229 /* Constants for register set sizes.  */
 230 enum
 231   {
 232     ppc_num_gprs = 32,          /* 32 general-purpose registers */
 233     ppc_num_fprs = 32,          /* 32 floating-point registers */
 234     ppc_num_srs = 16,           /* 16 segment registers */
 235     ppc_num_vrs = 32            /* 32 Altivec vector registers */
 236   };
 237
 238
 239 /* Register number constants.  These are GDB internal register
 240    numbers; they are not used for the simulator or remote targets.
 241    Extra SPRs (those other than MQ, CTR, LR, XER, SPEFSCR) are given
 242    numbers above PPC_NUM_REGS.  So are segment registers and other
 243    target-defined registers.  */
 244 enum {
 245   PPC_R0_REGNUM = 0,
 246   PPC_F0_REGNUM = 32,
 247   PPC_PC_REGNUM = 64,
 248   PPC_MSR_REGNUM = 65,
 249   PPC_CR_REGNUM = 66,
 250   PPC_LR_REGNUM = 67,
 251   PPC_CTR_REGNUM = 68,
 252   PPC_XER_REGNUM = 69,
 253   PPC_FPSCR_REGNUM = 70,
 254   PPC_MQ_REGNUM = 71,
 255   PPC_SPE_UPPER_GP0_REGNUM = 72,
 256   PPC_SPE_ACC_REGNUM = 104,
 257   PPC_SPE_FSCR_REGNUM = 105,
 258   PPC_VR0_REGNUM = 106,
 259   PPC_VSCR_REGNUM = 138,
 260   PPC_VRSAVE_REGNUM = 139,
 261   PPC_NUM_REGS
 262 };
 263
 264
 265 /* Instruction size.  */
 266 #define PPC_INSN_SIZE 4
 267
 268 /* Estimate for the maximum number of instrctions in a function epilogue.  */
 269 #define PPC_MAX_EPILOGUE_INSTRUCTIONS  52
 270
 271 extern struct target_desc *tdesc_powerpc_e500;
 272
 273 #endif /* ppc-tdep.h */