| 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-sysv-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 | |
| 60 | enum return_value_convention ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, |
| 61 | struct type *func_type, |
| 62 | struct type *valtype, |
| 63 | struct regcache *regcache, |
| 64 | gdb_byte *readbuf, |
| 65 | const gdb_byte *writebuf); |
| 66 | |
| 67 | /* From rs6000-tdep.c... */ |
| 68 | int altivec_register_p (struct gdbarch *gdbarch, int regno); |
| 69 | int spe_register_p (struct gdbarch *gdbarch, int regno); |
| 70 | |
| 71 | /* Return non-zero if the architecture described by GDBARCH has |
| 72 | floating-point registers (f0 --- f31 and fpscr). */ |
| 73 | int ppc_floating_point_unit_p (struct gdbarch *gdbarch); |
| 74 | |
| 75 | /* Return non-zero if the architecture described by GDBARCH has |
| 76 | Altivec registers (vr0 --- vr31, vrsave and vscr). */ |
| 77 | int ppc_altivec_support_p (struct gdbarch *gdbarch); |
| 78 | |
| 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 | /* Collect register REGNUM in the general-purpose register set |
| 140 | REGSET. from register cache REGCACHE into the buffer specified by |
| 141 | GREGS and LEN. If REGNUM is -1, do this for all registers in |
| 142 | REGSET. */ |
| 143 | |
| 144 | extern void ppc_collect_gregset (const struct regset *regset, |
| 145 | const struct regcache *regcache, |
| 146 | int regnum, void *gregs, size_t len); |
| 147 | |
| 148 | /* Collect register REGNUM in the floating-point register set |
| 149 | REGSET. from register cache REGCACHE into the buffer specified by |
| 150 | FPREGS and LEN. If REGNUM is -1, do this for all registers in |
| 151 | REGSET. */ |
| 152 | |
| 153 | extern void ppc_collect_fpregset (const struct regset *regset, |
| 154 | const struct regcache *regcache, |
| 155 | int regnum, void *fpregs, size_t len); |
| 156 | |
| 157 | /* Collect register REGNUM in the Altivec register set |
| 158 | REGSET from register cache REGCACHE into the buffer specified by |
| 159 | VRREGS and LEN. If REGNUM is -1, do this for all registers in |
| 160 | REGSET. */ |
| 161 | |
| 162 | extern void ppc_collect_vrregset (const struct regset *regset, |
| 163 | const struct regcache *regcache, |
| 164 | int regnum, void *vrregs, size_t len); |
| 165 | |
| 166 | /* Private data that this module attaches to struct gdbarch. */ |
| 167 | |
| 168 | /* Vector ABI used by the inferior. */ |
| 169 | enum powerpc_vector_abi |
| 170 | { |
| 171 | POWERPC_VEC_AUTO, |
| 172 | POWERPC_VEC_GENERIC, |
| 173 | POWERPC_VEC_ALTIVEC, |
| 174 | POWERPC_VEC_SPE, |
| 175 | POWERPC_VEC_LAST |
| 176 | }; |
| 177 | |
| 178 | struct gdbarch_tdep |
| 179 | { |
| 180 | int wordsize; /* Size in bytes of fixed-point word. */ |
| 181 | int soft_float; /* Avoid FP registers for arguments? */ |
| 182 | |
| 183 | /* How to pass vector arguments. Never set to AUTO or LAST. */ |
| 184 | enum powerpc_vector_abi vector_abi; |
| 185 | |
| 186 | int ppc_gp0_regnum; /* GPR register 0 */ |
| 187 | int ppc_toc_regnum; /* TOC register */ |
| 188 | int ppc_ps_regnum; /* Processor (or machine) status (%msr) */ |
| 189 | int ppc_cr_regnum; /* Condition register */ |
| 190 | int ppc_lr_regnum; /* Link register */ |
| 191 | int ppc_ctr_regnum; /* Count register */ |
| 192 | int ppc_xer_regnum; /* Integer exception register */ |
| 193 | |
| 194 | /* Not all PPC and RS6000 variants will have the registers |
| 195 | represented below. A -1 is used to indicate that the register |
| 196 | is not present in this variant. */ |
| 197 | |
| 198 | /* Floating-point registers. */ |
| 199 | int ppc_fp0_regnum; /* floating-point register 0 */ |
| 200 | int ppc_fpscr_regnum; /* fp status and condition register */ |
| 201 | |
| 202 | /* Multiplier-Quotient Register (older POWER architectures only). */ |
| 203 | int ppc_mq_regnum; |
| 204 | |
| 205 | /* Altivec registers. */ |
| 206 | int ppc_vr0_regnum; /* First AltiVec register */ |
| 207 | int ppc_vrsave_regnum; /* Last AltiVec register */ |
| 208 | |
| 209 | /* SPE registers. */ |
| 210 | int ppc_ev0_upper_regnum; /* First GPR upper half register */ |
| 211 | int ppc_ev0_regnum; /* First ev register */ |
| 212 | int ppc_acc_regnum; /* SPE 'acc' register */ |
| 213 | int ppc_spefscr_regnum; /* SPE 'spefscr' register */ |
| 214 | |
| 215 | /* Decimal 128 registers. */ |
| 216 | int ppc_dl0_regnum; /* First Decimal128 argument register pair. */ |
| 217 | |
| 218 | /* Offset to ABI specific location where link register is saved. */ |
| 219 | int lr_frame_offset; |
| 220 | |
| 221 | /* An array of integers, such that sim_regno[I] is the simulator |
| 222 | register number for GDB register number I, or -1 if the |
| 223 | simulator does not implement that register. */ |
| 224 | int *sim_regno; |
| 225 | |
| 226 | /* ISA-specific types. */ |
| 227 | struct type *ppc_builtin_type_vec64; |
| 228 | }; |
| 229 | |
| 230 | |
| 231 | /* Constants for register set sizes. */ |
| 232 | enum |
| 233 | { |
| 234 | ppc_num_gprs = 32, /* 32 general-purpose registers */ |
| 235 | ppc_num_fprs = 32, /* 32 floating-point registers */ |
| 236 | ppc_num_srs = 16, /* 16 segment registers */ |
| 237 | ppc_num_vrs = 32 /* 32 Altivec vector registers */ |
| 238 | }; |
| 239 | |
| 240 | |
| 241 | /* Register number constants. These are GDB internal register |
| 242 | numbers; they are not used for the simulator or remote targets. |
| 243 | Extra SPRs (those other than MQ, CTR, LR, XER, SPEFSCR) are given |
| 244 | numbers above PPC_NUM_REGS. So are segment registers and other |
| 245 | target-defined registers. */ |
| 246 | enum { |
| 247 | PPC_R0_REGNUM = 0, |
| 248 | PPC_F0_REGNUM = 32, |
| 249 | PPC_PC_REGNUM = 64, |
| 250 | PPC_MSR_REGNUM = 65, |
| 251 | PPC_CR_REGNUM = 66, |
| 252 | PPC_LR_REGNUM = 67, |
| 253 | PPC_CTR_REGNUM = 68, |
| 254 | PPC_XER_REGNUM = 69, |
| 255 | PPC_FPSCR_REGNUM = 70, |
| 256 | PPC_MQ_REGNUM = 71, |
| 257 | PPC_SPE_UPPER_GP0_REGNUM = 72, |
| 258 | PPC_SPE_ACC_REGNUM = 104, |
| 259 | PPC_SPE_FSCR_REGNUM = 105, |
| 260 | PPC_VR0_REGNUM = 106, |
| 261 | PPC_VSCR_REGNUM = 138, |
| 262 | PPC_VRSAVE_REGNUM = 139, |
| 263 | PPC_NUM_REGS |
| 264 | }; |
| 265 | |
| 266 | |
| 267 | /* Instruction size. */ |
| 268 | #define PPC_INSN_SIZE 4 |
| 269 | |
| 270 | /* Estimate for the maximum number of instrctions in a function epilogue. */ |
| 271 | #define PPC_MAX_EPILOGUE_INSTRUCTIONS 52 |
| 272 | |
| 273 | #endif /* ppc-tdep.h */ |