1285SN/A/* Target-dependent code for PowerPC systems running NetBSD. 2821Saefimov Copyright 2002, 2003 Free Software Foundation, Inc. 3285SN/A Contributed by Wasabi Systems, Inc. 4285SN/A 5285SN/A This file is part of GDB. 6285SN/A 7285SN/A This program is free software; you can redistribute it and/or modify 8285SN/A it under the terms of the GNU General Public License as published by 9285SN/A the Free Software Foundation; either version 2 of the License, or 10285SN/A (at your option) any later version. 11285SN/A 12285SN/A This program is distributed in the hope that it will be useful, 13285SN/A but WITHOUT ANY WARRANTY; without even the implied warranty of 14285SN/A MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15285SN/A GNU General Public License for more details. 16285SN/A 17285SN/A You should have received a copy of the GNU General Public License 18285SN/A along with this program; if not, write to the Free Software 19285SN/A Foundation, Inc., 59 Temple Place - Suite 330, 20285SN/A Boston, MA 02111-1307, USA. */ 21285SN/A 22285SN/A#include "defs.h" 23285SN/A#include "gdbcore.h" 24285SN/A#include "regcache.h" 25285SN/A#include "target.h" 26285SN/A#include "breakpoint.h" 27285SN/A#include "value.h" 28285SN/A#include "osabi.h" 29285SN/A 30285SN/A#include "ppc-tdep.h" 31285SN/A#include "ppcnbsd-tdep.h" 32285SN/A#include "nbsd-tdep.h" 33285SN/A 34285SN/A#include "solib-svr4.h" 35285SN/A 36285SN/A#define REG_FIXREG_OFFSET(x) ((x) * 4) 37285SN/A#define REG_LR_OFFSET (32 * 4) 38285SN/A#define REG_CR_OFFSET (33 * 4) 39285SN/A#define REG_XER_OFFSET (34 * 4) 40285SN/A#define REG_CTR_OFFSET (35 * 4) 41285SN/A#define REG_PC_OFFSET (36 * 4) 42285SN/A#define SIZEOF_STRUCT_REG (37 * 4) 43285SN/A 44285SN/A#define FPREG_FPR_OFFSET(x) ((x) * 8) 45285SN/A#define FPREG_FPSCR_OFFSET (32 * 8) 46285SN/A#define SIZEOF_STRUCT_FPREG (33 * 8) 47285SN/A 48285SN/Avoid 49285SN/Appcnbsd_supply_reg (char *regs, int regno) 50285SN/A{ 51285SN/A struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); 52285SN/A int i; 53285SN/A 54285SN/A for (i = 0; i <= 31; i++) 55285SN/A { 56285SN/A if (regno == i || regno == -1) 57285SN/A supply_register (i, regs + REG_FIXREG_OFFSET (i)); 58285SN/A } 59285SN/A 60285SN/A if (regno == tdep->ppc_lr_regnum || regno == -1) 61285SN/A supply_register (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET); 62285SN/A 63285SN/A if (regno == tdep->ppc_cr_regnum || regno == -1) 64285SN/A supply_register (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET); 65285SN/A 66285SN/A if (regno == tdep->ppc_xer_regnum || regno == -1) 67285SN/A supply_register (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET); 68285SN/A 69285SN/A if (regno == tdep->ppc_ctr_regnum || regno == -1) 70285SN/A supply_register (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET); 71285SN/A 72285SN/A if (regno == PC_REGNUM || regno == -1) 73285SN/A supply_register (PC_REGNUM, regs + REG_PC_OFFSET); 74285SN/A} 75285SN/A 76285SN/Avoid 77285SN/Appcnbsd_fill_reg (char *regs, int regno) 78285SN/A{ 79285SN/A struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); 80285SN/A int i; 81641Smkos 82641Smkos for (i = 0; i <= 31; i++) 83641Smkos { 84285SN/A if (regno == i || regno == -1) 85285SN/A regcache_collect (i, regs + REG_FIXREG_OFFSET (i)); 86285SN/A } 87285SN/A 88285SN/A if (regno == tdep->ppc_lr_regnum || regno == -1) 89285SN/A regcache_collect (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET); 90285SN/A 91285SN/A if (regno == tdep->ppc_cr_regnum || regno == -1) 92285SN/A regcache_collect (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET); 93285SN/A 94285SN/A if (regno == tdep->ppc_xer_regnum || regno == -1) 95285SN/A regcache_collect (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET); 96285SN/A 97285SN/A if (regno == tdep->ppc_ctr_regnum || regno == -1) 98285SN/A regcache_collect (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET); 99285SN/A 100285SN/A if (regno == PC_REGNUM || regno == -1) 101641Smkos regcache_collect (PC_REGNUM, regs + REG_PC_OFFSET); 102641Smkos} 103285SN/A 104285SN/Avoid 105285SN/Appcnbsd_supply_fpreg (char *fpregs, int regno) 106285SN/A{ 107285SN/A struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); 108285SN/A int i; 109285SN/A 110285SN/A for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) 111285SN/A { 112285SN/A if (regno == i || regno == -1) 113285SN/A supply_register (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM)); 114285SN/A } 115285SN/A 116285SN/A if (regno == tdep->ppc_fpscr_regnum || regno == -1) 117285SN/A supply_register (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET); 118285SN/A} 119285SN/A 120285SN/Avoid 121285SN/Appcnbsd_fill_fpreg (char *fpregs, int regno) 122285SN/A{ 123285SN/A struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); 124285SN/A int i; 125285SN/A 126285SN/A for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) 127285SN/A { 128285SN/A if (regno == i || regno == -1) 129285SN/A regcache_collect (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM)); 130285SN/A } 131285SN/A 132285SN/A if (regno == tdep->ppc_fpscr_regnum || regno == -1) 133285SN/A regcache_collect (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET); 134285SN/A} 135285SN/A 136285SN/Astatic void 137285SN/Afetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, 138285SN/A CORE_ADDR ignore) 139285SN/A{ 140285SN/A char *regs, *fpregs; 141285SN/A 142285SN/A /* We get everything from one section. */ 143285SN/A if (which != 0) 144285SN/A return; 145285SN/A 146285SN/A regs = core_reg_sect; 147285SN/A fpregs = core_reg_sect + SIZEOF_STRUCT_REG; 148285SN/A 149285SN/A /* Integer registers. */ 150285SN/A ppcnbsd_supply_reg (regs, -1); 151285SN/A 152285SN/A /* Floating point registers. */ 153285SN/A ppcnbsd_supply_fpreg (fpregs, -1); 154285SN/A} 155285SN/A 156285SN/Astatic void 157285SN/Afetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which, 158285SN/A CORE_ADDR ignore) 159285SN/A{ 160285SN/A switch (which) 161285SN/A { 162285SN/A case 0: /* Integer registers. */ 163285SN/A if (core_reg_size != SIZEOF_STRUCT_REG) 164285SN/A warning ("Wrong size register set in core file."); 165285SN/A else 166285SN/A ppcnbsd_supply_reg (core_reg_sect, -1); 167285SN/A break; 168821Saefimov 169285SN/A case 2: /* Floating point registers. */ 170285SN/A if (core_reg_size != SIZEOF_STRUCT_FPREG) 171285SN/A warning ("Wrong size FP register set in core file."); 172285SN/A else 173285SN/A ppcnbsd_supply_fpreg (core_reg_sect, -1); 174285SN/A break; 175285SN/A 176285SN/A default: 177285SN/A /* Don't know what kind of register request this is; just ignore it. */ 178285SN/A break; 179285SN/A } 180285SN/A} 181285SN/A 182285SN/Astatic struct core_fns ppcnbsd_core_fns = 183285SN/A{ 184285SN/A bfd_target_unknown_flavour, /* core_flavour */ 185285SN/A default_check_format, /* check_format */ 186285SN/A default_core_sniffer, /* core_sniffer */ 187285SN/A fetch_core_registers, /* core_read_registers */ 188285SN/A NULL /* next */ 189285SN/A}; 190285SN/A 191367SN/Astatic struct core_fns ppcnbsd_elfcore_fns = 192285SN/A{ 193285SN/A bfd_target_elf_flavour, /* core_flavour */ 194285SN/A default_check_format, /* check_format */ 195285SN/A default_core_sniffer, /* core_sniffer */ 196285SN/A fetch_elfcore_registers, /* core_read_registers */ 197285SN/A NULL /* next */ 198285SN/A}; 199285SN/A 200285SN/Astatic int 201285SN/Appcnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name) 202285SN/A{ 203285SN/A /* FIXME: Need to add support for kernel-provided signal trampolines. */ 204285SN/A return (nbsd_pc_in_sigtramp (pc, func_name)); 205285SN/A} 206285SN/A 207285SN/A/* NetBSD is confused. It appears that 1.5 was using the correct SVr4 208285SN/A convention but, 1.6 switched to the below broken convention. For 209285SN/A the moment use the broken convention. Ulgh!. */ 210285SN/A 211285SN/Astatic enum return_value_convention 212285SN/Appcnbsd_return_value (struct gdbarch *gdbarch, struct type *valtype, 213285SN/A struct regcache *regcache, void *readbuf, 214285SN/A const void *writebuf) 215285SN/A{ 216285SN/A if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT 217285SN/A || TYPE_CODE (valtype) == TYPE_CODE_UNION) 218285SN/A && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8) 219285SN/A && TYPE_VECTOR (valtype)) 220285SN/A && !(TYPE_LENGTH (valtype) == 1 221285SN/A || TYPE_LENGTH (valtype) == 2 222285SN/A || TYPE_LENGTH (valtype) == 4 223285SN/A || TYPE_LENGTH (valtype) == 8)) 224285SN/A return RETURN_VALUE_STRUCT_CONVENTION; 225285SN/A else 226285SN/A return ppc_sysv_abi_broken_return_value (gdbarch, valtype, regcache, 227285SN/A readbuf, writebuf); 228285SN/A} 229285SN/A 230285SN/Astatic void 231285SN/Appcnbsd_init_abi (struct gdbarch_info info, 232285SN/A struct gdbarch *gdbarch) 233285SN/A{ 234285SN/A set_gdbarch_pc_in_sigtramp (gdbarch, ppcnbsd_pc_in_sigtramp); 235285SN/A /* For NetBSD, this is an on again, off again thing. Some systems 236285SN/A do use the broken struct convention, and some don't. */ 237285SN/A set_gdbarch_return_value (gdbarch, ppcnbsd_return_value); 238285SN/A set_solib_svr4_fetch_link_map_offsets (gdbarch, 239285SN/A nbsd_ilp32_solib_svr4_fetch_link_map_offsets); 240285SN/A} 241285SN/A 242285SN/Avoid 243285SN/A_initialize_ppcnbsd_tdep (void) 244285SN/A{ 245285SN/A gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD_ELF, 246285SN/A ppcnbsd_init_abi); 247285SN/A 248285SN/A add_core_fns (&ppcnbsd_core_fns); 249285SN/A add_core_fns (&ppcnbsd_elfcore_fns); 250285SN/A} 251285SN/A