gdb/ppc-tdep.h

   1 /* Target-dependent code for GDB, the GNU debugger.
   2
   3    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007
   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 *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 type *valtype,
  38                                                                struct regcache *regcache,
  39                                                                gdb_byte *readbuf,
  40                                                                const gdb_byte *writebuf);
  41 CORE_ADDR ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
  42                                         struct value *function,
  43                                         struct regcache *regcache,
  44                                         CORE_ADDR bp_addr, int nargs,
  45                                         struct value **args, CORE_ADDR sp,
  46                                         int struct_return,
  47                                         CORE_ADDR struct_addr);
  48 CORE_ADDR ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
  49                                           struct value *function,
  50                                           struct regcache *regcache,
  51                                           CORE_ADDR bp_addr, int nargs,
  52                                           struct value **args, CORE_ADDR sp,
  53                                           int struct_return,
  54                                           CORE_ADDR struct_addr);
  55 CORE_ADDR ppc64_sysv_abi_adjust_breakpoint_address (struct gdbarch *gdbarch,
  56                                                     CORE_ADDR bpaddr);
  57 int ppc_linux_memory_remove_breakpoint (struct bp_target_info *bp_tgt);
  58 struct link_map_offsets *ppc_linux_svr4_fetch_link_map_offsets (void);
  59 const struct regset *ppc_linux_gregset (int);
  60 const struct regset *ppc_linux_fpregset (void);
  61
  62 enum return_value_convention ppc64_sysv_abi_return_value (struct gdbarch *gdbarch,
  63                                                           struct type *valtype,
  64                                                           struct regcache *regcache,
  65                                                           gdb_byte *readbuf,
  66                                                           const gdb_byte *writebuf);
  67
  68 /* From rs6000-tdep.c... */
  69 int altivec_register_p (int regno);
  70 int spe_register_p (int regno);
  71
  72 /* Return non-zero if the architecture described by GDBARCH has
  73    floating-point registers (f0 --- f31 and fpscr).  */
  74 int ppc_floating_point_unit_p (struct gdbarch *gdbarch);
  75
  76 /* Register set description.  */
  77
  78 struct ppc_reg_offsets
  79 {
  80   /* General-purpose registers.  */
  81   int r0_offset;
  82   int gpr_size; /* size for r0-31, pc, ps, lr, ctr.  */
  83   int xr_size;  /* size for cr, xer, mq.  */
  84   int pc_offset;
  85   int ps_offset;
  86   int cr_offset;
  87   int lr_offset;
  88   int ctr_offset;
  89   int xer_offset;
  90   int mq_offset;
  91
  92   /* Floating-point registers.  */
  93   int f0_offset;
  94   int fpscr_offset;
  95   int fpscr_size;
  96
  97   /* AltiVec registers.  */
  98   int vr0_offset;
  99   int vscr_offset;
 100   int vrsave_offset;
 101 };
 102
 103 /* Supply register REGNUM in the general-purpose register set REGSET
 104    from the buffer specified by GREGS and LEN to register cache
 105    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 106
 107 extern void ppc_supply_gregset (const struct regset *regset,
 108                                 struct regcache *regcache,
 109                                 int regnum, const void *gregs, size_t len);
 110
 111 /* Supply register REGNUM in the floating-point register set REGSET
 112    from the buffer specified by FPREGS and LEN to register cache
 113    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 114
 115 extern void ppc_supply_fpregset (const struct regset *regset,
 116                                  struct regcache *regcache,
 117                                  int regnum, const void *fpregs, size_t len);
 118
 119 /* Collect register REGNUM in the general-purpose register set
 120    REGSET. from register cache REGCACHE into the buffer specified by
 121    GREGS and LEN.  If REGNUM is -1, do this for all registers in
 122    REGSET.  */
 123
 124 extern void ppc_collect_gregset (const struct regset *regset,
 125                                  const struct regcache *regcache,
 126                                  int regnum, void *gregs, size_t len);
 127
 128 /* Collect register REGNUM in the floating-point register set
 129    REGSET. from register cache REGCACHE into the buffer specified by
 130    FPREGS and LEN.  If REGNUM is -1, do this for all registers in
 131    REGSET.  */
 132
 133 extern void ppc_collect_fpregset (const struct regset *regset,
 134                                   const struct regcache *regcache,
 135                                   int regnum, void *fpregs, size_t len);
 136
 137 /* Private data that this module attaches to struct gdbarch. */
 138
 139 struct gdbarch_tdep
 140   {
 141     int wordsize;              /* size in bytes of fixed-point word */
 142     int ppc_gp0_regnum;         /* GPR register 0 */
 143     int ppc_toc_regnum;         /* TOC register */
 144     int ppc_ps_regnum;          /* Processor (or machine) status (%msr) */
 145     int ppc_cr_regnum;          /* Condition register */
 146     int ppc_lr_regnum;          /* Link register */
 147     int ppc_ctr_regnum;         /* Count register */
 148     int ppc_xer_regnum;         /* Integer exception register */
 149
 150     /* Not all PPC and RS6000 variants will have the registers
 151        represented below.  A -1 is used to indicate that the register
 152        is not present in this variant.  */
 153
 154     /* Floating-point registers.  */
 155     int ppc_fp0_regnum;         /* floating-point register 0 */
 156     int ppc_fpscr_regnum;       /* fp status and condition register */
 157
 158     /* Multiplier-Quotient Register (older POWER architectures only).  */
 159     int ppc_mq_regnum;
 160
 161     /* Altivec registers.  */
 162     int ppc_vr0_regnum;         /* First AltiVec register */
 163     int ppc_vrsave_regnum;      /* Last AltiVec register */
 164
 165     /* SPE registers.  */
 166     int ppc_ev0_upper_regnum;   /* First GPR upper half register */
 167     int ppc_ev0_regnum;         /* First ev register */
 168     int ppc_ev31_regnum;        /* Last ev register */
 169     int ppc_acc_regnum;         /* SPE 'acc' register */
 170     int ppc_spefscr_regnum;     /* SPE 'spefscr' register */
 171
 172     /* Offset to ABI specific location where link register is saved.  */
 173     int lr_frame_offset;
 174
 175     /* An array of integers, such that sim_regno[I] is the simulator
 176        register number for GDB register number I, or -1 if the
 177        simulator does not implement that register.  */
 178     int *sim_regno;
 179
 180     /* Minimum possible text address.  */
 181     CORE_ADDR text_segment_base;
 182
 183     /* ISA-specific types.  */
 184     struct type *ppc_builtin_type_vec64;
 185 };
 186
 187
 188 /* Constants for register set sizes.  */
 189 enum
 190   {
 191     ppc_num_gprs = 32,          /* 32 general-purpose registers */
 192     ppc_num_fprs = 32,          /* 32 floating-point registers */
 193     ppc_num_srs = 16,           /* 16 segment registers */
 194     ppc_num_vrs = 32            /* 32 Altivec vector registers */
 195   };
 196
 197
 198 /* Register number constants.  These are GDB internal register
 199    numbers; they are not used for the simulator or remote targets.
 200    Extra SPRs (those other than MQ, CTR, LR, XER, SPEFSCR) are given
 201    numbers above PPC_NUM_REGS.  So are segment registers and other
 202    target-defined registers.  */
 203 enum {
 204   PPC_R0_REGNUM = 0,
 205   PPC_F0_REGNUM = 32,
 206   PPC_PC_REGNUM = 64,
 207   PPC_MSR_REGNUM = 65,
 208   PPC_CR_REGNUM = 66,
 209   PPC_LR_REGNUM = 67,
 210   PPC_CTR_REGNUM = 68,
 211   PPC_XER_REGNUM = 69,
 212   PPC_FPSCR_REGNUM = 70,
 213   PPC_MQ_REGNUM = 71,
 214   PPC_SPE_UPPER_GP0_REGNUM = 72,
 215   PPC_SPE_ACC_REGNUM = 104,
 216   PPC_SPE_FSCR_REGNUM = 105,
 217   PPC_VR0_REGNUM = 106,
 218   PPC_VSCR_REGNUM = 138,
 219   PPC_VRSAVE_REGNUM = 139,
 220   PPC_NUM_REGS
 221 };
 222
 223
 224 /* Instruction size.  */
 225 #define PPC_INSN_SIZE 4
 226
 227 /* Estimate for the maximum number of instrctions in a function epilogue.  */
 228 #define PPC_MAX_EPILOGUE_INSTRUCTIONS  52
 229
 230 extern struct target_desc *tdesc_powerpc_e500;
 231
 232 #endif /* ppc-tdep.h */