1/* Native-dependent code for NetBSD/sparc64. 2 3 Copyright (C) 2003, 2004, 2006, 2007 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#include "defs.h" 21#include "gdbcore.h" 22#include "regcache.h" 23#include "target.h" 24 25#include "sparc64-tdep.h" 26#include "sparc-nat.h" 27 28/* NetBSD is different from the other OSes that support both SPARC and 29 UltraSPARC in that the result of ptrace(2) depends on whether the 30 traced process is 32-bit or 64-bit. */ 31 32static void 33sparc64nbsd_supply_gregset (const struct sparc_gregset *gregset, 34 struct regcache *regcache, 35 int regnum, const void *gregs) 36{ 37 int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32); 38 39 if (sparc32) 40 sparc32_supply_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs); 41 else 42 sparc64_supply_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs); 43} 44 45static void 46sparc64nbsd_collect_gregset (const struct sparc_gregset *gregset, 47 const struct regcache *regcache, 48 int regnum, void *gregs) 49{ 50 int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32); 51 52 if (sparc32) 53 sparc32_collect_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs); 54 else 55 sparc64_collect_gregset (&sparc64nbsd_gregset, regcache, regnum, gregs); 56} 57 58static void 59sparc64nbsd_supply_fpregset (struct regcache *regcache, 60 int regnum, const void *fpregs) 61{ 62 int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32); 63 64 if (sparc32) 65 sparc32_supply_fpregset (regcache, regnum, fpregs); 66 else 67 sparc64_supply_fpregset (regcache, regnum, fpregs); 68} 69 70static void 71sparc64nbsd_collect_fpregset (const struct regcache *regcache, 72 int regnum, void *fpregs) 73{ 74 int sparc32 = (gdbarch_ptr_bit (current_gdbarch) == 32); 75 76 if (sparc32) 77 sparc32_collect_fpregset (regcache, regnum, fpregs); 78 else 79 sparc64_collect_fpregset (regcache, regnum, fpregs); 80} 81 82/* Determine whether `gregset_t' contains register REGNUM. */ 83 84static int 85sparc64nbsd_gregset_supplies_p (int regnum) 86{ 87 if (gdbarch_ptr_bit (current_gdbarch) == 32) 88 return sparc32_gregset_supplies_p (regnum); 89 90 /* Integer registers. */ 91 if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) 92 || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) 93 || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) 94 || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) 95 return 1; 96 97 /* Control registers. */ 98 if (regnum == SPARC64_PC_REGNUM 99 || regnum == SPARC64_NPC_REGNUM 100 || regnum == SPARC64_STATE_REGNUM 101 || regnum == SPARC64_Y_REGNUM) 102 return 1; 103 104 return 0; 105} 106 107/* Determine whether `fpregset_t' contains register REGNUM. */ 108 109static int 110sparc64nbsd_fpregset_supplies_p (int regnum) 111{ 112 if (gdbarch_ptr_bit (current_gdbarch) == 32) 113 return sparc32_fpregset_supplies_p (regnum); 114 115 /* Floating-point registers. */ 116 if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) 117 || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) 118 return 1; 119 120 /* Control registers. */ 121 if (regnum == SPARC64_FSR_REGNUM) 122 return 1; 123 124 return 0; 125} 126 127 128/* Support for debugging kernel virtual memory images. */ 129 130#include <sys/types.h> 131#include <machine/pcb.h> 132 133#include "bsd-kvm.h" 134 135static int 136sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) 137{ 138 u_int64_t state; 139 int regnum; 140 141 /* The following is true for NetBSD 1.6.2: 142 143 The pcb contains %sp and %pc, %psr and %wim. From this information 144 we reconstruct the register state as it would look when we just 145 returned from cpu_switch(). */ 146 147 /* The stack pointer shouldn't be zero. */ 148 if (pcb->pcb_sp == 0) 149 return 0; 150 151 /* If the program counter is zero, this is probably a core dump, and 152 we can get %pc from the stack. */ 153 if (pcb->pcb_pc == 0) 154 read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), 155 (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc); 156 157 158 regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp); 159 regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc); 160 161 state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; 162 regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state); 163 164 sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); 165 166 return 1; 167} 168 169 170/* Provide a prototype to silence -Wmissing-prototypes. */ 171void _initialize_sparc64nbsd_nat (void); 172 173void 174_initialize_sparc64nbsd_nat (void) 175{ 176 sparc_supply_gregset = sparc64nbsd_supply_gregset; 177 sparc_collect_gregset = sparc64nbsd_collect_gregset; 178 sparc_supply_fpregset = sparc64nbsd_supply_fpregset; 179 sparc_collect_fpregset = sparc64nbsd_collect_fpregset; 180 sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p; 181 sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p; 182 183 /* We've got nothing to add to the generic SPARC target. */ 184 add_target (sparc_target ()); 185 186 /* Support debugging kernel virtual memory images. */ 187 bsd_kvm_add_target (sparc64nbsd_supply_pcb); 188} 189