1 /* Native-dependent code for NetBSD/hppa. 2 3 Copyright (C) 2008-2023 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 "inferior.h" 22 #include "regcache.h" 23 24 #include <sys/types.h> 25 #include <sys/ptrace.h> 26 #include <machine/reg.h> 27 28 #include "hppa-tdep.h" 29 #include "inf-ptrace.h" 30 31 #include "netbsd-nat.h" 32 33 class hppa_nbsd_nat_target final : public nbsd_nat_target 34 { 35 void fetch_registers (struct regcache *, int) override; 36 void store_registers (struct regcache *, int) override; 37 }; 38 39 static hppa_nbsd_nat_target the_hppa_nbsd_nat_target; 40 41 static int 42 hppanbsd_gregset_supplies_p (int regnum) 43 { 44 return ((regnum >= HPPA_R0_REGNUM && regnum <= HPPA_R31_REGNUM) || 45 (regnum >= HPPA_SAR_REGNUM && regnum <= HPPA_PCSQ_TAIL_REGNUM) || 46 regnum == HPPA_IPSW_REGNUM || 47 (regnum >= HPPA_SR4_REGNUM && regnum <= HPPA_SR4_REGNUM + 5)); 48 } 49 50 static int 51 hppanbsd_fpregset_supplies_p (int regnum) 52 { 53 return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM); 54 } 55 56 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ 57 58 static void 59 hppanbsd_supply_gregset (struct regcache *regcache, const void *gregs) 60 { 61 const char *regs = (const char *)gregs; 62 int regnum; 63 64 for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++) 65 regcache->raw_supply (regnum, regs + regnum * 4); 66 67 regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4); 68 regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); 69 regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); 70 regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 71 regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 72 regcache->raw_supply (HPPA_IPSW_REGNUM, regs); 73 regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4); 74 regcache->raw_supply (HPPA_SR4_REGNUM + 1, regs + 37 * 4); 75 regcache->raw_supply (HPPA_SR4_REGNUM + 2, regs + 38 * 4); 76 regcache->raw_supply (HPPA_SR4_REGNUM + 3, regs + 39 * 4); 77 regcache->raw_supply (HPPA_SR4_REGNUM + 4, regs + 40 * 4); 78 } 79 80 /* Supply the floating-point registers stored in FPREGS to REGCACHE. */ 81 82 static void 83 hppanbsd_supply_fpregset (struct regcache *regcache, const void *fpregs) 84 { 85 const char *regs = (const char *)fpregs; 86 int regnum; 87 88 for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM; 89 regnum += 2, regs += 8) 90 { 91 regcache->raw_supply (regnum, regs); 92 regcache->raw_supply (regnum + 1, regs + 4); 93 } 94 } 95 96 /* Collect the general-purpose registers from REGCACHE and store them 97 in GREGS. */ 98 99 static void 100 hppanbsd_collect_gregset (const struct regcache *regcache, 101 void *gregs, int regnum) 102 { 103 char *regs = (char *)gregs; 104 int i; 105 106 for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++) 107 { 108 if (regnum == -1 || regnum == i) 109 regcache->raw_collect (i, regs + i * 4); 110 } 111 112 if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) 113 regcache->raw_collect (HPPA_IPSW_REGNUM, regs); 114 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) 115 regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 116 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) 117 regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 118 119 if (regnum == -1 || regnum == HPPA_SAR_REGNUM) 120 regcache->raw_collect (HPPA_SAR_REGNUM, regs + 32 * 4); 121 if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM) 122 regcache->raw_collect (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); 123 if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM) 124 regcache->raw_collect (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); 125 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) 126 regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 127 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) 128 regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 129 if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) 130 regcache->raw_collect (HPPA_IPSW_REGNUM, regs); 131 if (regnum == -1 || regnum == HPPA_SR4_REGNUM) 132 regcache->raw_collect (HPPA_SR4_REGNUM, regs + 41 * 4); 133 if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 1) 134 regcache->raw_collect (HPPA_SR4_REGNUM + 1, regs + 37 * 4); 135 if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 2) 136 regcache->raw_collect (HPPA_SR4_REGNUM + 2, regs + 38 * 4); 137 if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 3) 138 regcache->raw_collect (HPPA_SR4_REGNUM + 3, regs + 39 * 4); 139 if (regnum == -1 || regnum == HPPA_SR4_REGNUM + 4) 140 regcache->raw_collect (HPPA_SR4_REGNUM + 4, regs + 40 * 4); 141 } 142 143 /* Collect the floating-point registers from REGCACHE and store them 144 in FPREGS. */ 145 146 static void 147 hppanbsd_collect_fpregset (const struct regcache *regcache, 148 void *fpregs, int regnum) 149 { 150 char *regs = (char *)fpregs; 151 int i; 152 153 for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8) 154 { 155 if (regnum == -1 || regnum == i || regnum == i + 1) 156 { 157 regcache->raw_collect (i, regs); 158 regcache->raw_collect (i + 1, regs + 4); 159 } 160 } 161 } 162 163 164 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 165 for all registers (including the floating-point registers). */ 166 167 void 168 hppa_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) 169 170 { 171 pid_t pid = regcache->ptid ().pid (); 172 int lwp = regcache->ptid ().lwp (); 173 174 if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum)) 175 { 176 struct reg regs; 177 178 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) 179 perror_with_name (_("Couldn't get registers")); 180 181 hppanbsd_supply_gregset (regcache, ®s); 182 } 183 184 if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum)) 185 { 186 struct fpreg fpregs; 187 188 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) 189 perror_with_name (_("Couldn't get floating point status")); 190 191 hppanbsd_supply_fpregset (regcache, &fpregs); 192 } 193 } 194 195 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 196 this for all registers (including the floating-point registers). */ 197 198 void 199 hppa_nbsd_nat_target::store_registers (struct regcache *regcache, int regnum) 200 { 201 pid_t pid = regcache->ptid ().pid (); 202 int lwp = regcache->ptid ().lwp (); 203 204 if (regnum == -1 || hppanbsd_gregset_supplies_p (regnum)) 205 { 206 struct reg regs; 207 208 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) 209 perror_with_name (_("Couldn't get registers")); 210 211 hppanbsd_collect_gregset (regcache, ®s, regnum); 212 213 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) 214 perror_with_name (_("Couldn't write registers")); 215 } 216 217 if (regnum == -1 || hppanbsd_fpregset_supplies_p (regnum)) 218 { 219 struct fpreg fpregs; 220 221 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) 222 perror_with_name (_("Couldn't get floating point status")); 223 224 hppanbsd_collect_fpregset (regcache, &fpregs, regnum); 225 226 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) 227 perror_with_name (_("Couldn't write floating point status")); 228 } 229 } 230 231 void _initialize_hppanbsd_nat (); 232 void 233 _initialize_hppanbsd_nat () 234 { 235 add_inf_child_target (&the_hppa_nbsd_nat_target); 236 } 237