1 /* Native-dependent code for NetBSD/sparc64. 2 3 Copyright (C) 2003-2023 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 32 static void 33 sparc64nbsd_supply_gregset (const struct sparc_gregmap *gregmap, 34 struct regcache *regcache, 35 int regnum, const void *gregs) 36 { 37 int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32); 38 39 if (sparc32) 40 sparc32_supply_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs); 41 else 42 sparc64_supply_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs); 43 } 44 45 static void 46 sparc64nbsd_collect_gregset (const struct sparc_gregmap *gregmap, 47 const struct regcache *regcache, 48 int regnum, void *gregs) 49 { 50 int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32); 51 52 if (sparc32) 53 sparc32_collect_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs); 54 else 55 sparc64_collect_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs); 56 } 57 58 static void 59 sparc64nbsd_supply_fpregset (const struct sparc_fpregmap *fpregmap, 60 struct regcache *regcache, 61 int regnum, const void *fpregs) 62 { 63 int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32); 64 65 if (sparc32) 66 sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs); 67 else 68 sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); 69 } 70 71 static void 72 sparc64nbsd_collect_fpregset (const struct sparc_fpregmap *fpregmap, 73 const struct regcache *regcache, 74 int regnum, void *fpregs) 75 { 76 int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32); 77 78 if (sparc32) 79 sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs); 80 else 81 sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); 82 } 83 84 /* Determine whether `gregset_t' contains register REGNUM. */ 85 86 static int 87 sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum) 88 { 89 if (gdbarch_ptr_bit (gdbarch) == 32) 90 return sparc32_gregset_supplies_p (gdbarch, regnum); 91 92 /* Integer registers. */ 93 if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) 94 || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) 95 || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) 96 || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) 97 return 1; 98 99 /* Control registers. */ 100 if (regnum == SPARC64_PC_REGNUM 101 || regnum == SPARC64_NPC_REGNUM 102 || regnum == SPARC64_STATE_REGNUM 103 || regnum == SPARC64_Y_REGNUM) 104 return 1; 105 106 return 0; 107 } 108 109 /* Determine whether `fpregset_t' contains register REGNUM. */ 110 111 static int 112 sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum) 113 { 114 if (gdbarch_ptr_bit (gdbarch) == 32) 115 return sparc32_fpregset_supplies_p (gdbarch, regnum); 116 117 /* Floating-point registers. */ 118 if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) 119 || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) 120 return 1; 121 122 /* Control registers. */ 123 if (regnum == SPARC64_FSR_REGNUM) 124 return 1; 125 126 return 0; 127 } 128 129 130 /* Support for debugging kernel virtual memory images. */ 131 132 #include <sys/types.h> 133 #include <machine/pcb.h> 134 135 #include "bsd-kvm.h" 136 137 static int 138 sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) 139 { 140 u_int64_t state; 141 int regnum; 142 143 /* The following is true for NetBSD 1.6.2: 144 145 The pcb contains %sp and %pc, %pstate and %cwp. From this 146 information we reconstruct the register state as it would look 147 when we just returned from cpu_switch(). */ 148 149 /* The stack pointer shouldn't be zero. */ 150 if (pcb->pcb_sp == 0) 151 return 0; 152 153 /* If the program counter is zero, this is probably a core dump, and 154 we can get %pc from the stack. */ 155 if (pcb->pcb_pc == 0) 156 read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), 157 (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc); 158 159 regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp); 160 regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc); 161 162 state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; 163 regcache->raw_supply (SPARC64_STATE_REGNUM, &state); 164 165 sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); 166 167 return 1; 168 } 169 170 /* We've got nothing to add to the generic SPARC target. */ 171 static sparc_target<inf_ptrace_target> the_sparc64_nbsd_nat_target; 172 173 void _initialize_sparc64nbsd_nat (); 174 void 175 _initialize_sparc64nbsd_nat () 176 { 177 sparc_supply_gregset = sparc64nbsd_supply_gregset; 178 sparc_collect_gregset = sparc64nbsd_collect_gregset; 179 sparc_supply_fpregset = sparc64nbsd_supply_fpregset; 180 sparc_collect_fpregset = sparc64nbsd_collect_fpregset; 181 sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p; 182 sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p; 183 184 add_inf_child_target (&the_sparc64_nbsd_nat_target); 185 186 /* Support debugging kernel virtual memory images. */ 187 bsd_kvm_add_target (sparc64nbsd_supply_pcb); 188 } 189