1 /* Native-dependent code for OpenBSD/hppa. 2 3 Copyright (C) 2004-2020 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 #include "target.h" 24 25 #include <sys/types.h> 26 #include <sys/ptrace.h> 27 #include <machine/reg.h> 28 29 #include "hppa-tdep.h" 30 #include "inf-ptrace.h" 31 32 #include "obsd-nat.h" 33 34 struct hppa_obsd_nat_target final : public obsd_nat_target 35 { 36 void fetch_registers (struct regcache *, int) override; 37 void store_registers (struct regcache *, int) override; 38 }; 39 40 static hppa_obsd_nat_target the_hppa_obsd_nat_target; 41 42 static int 43 hppaobsd_gregset_supplies_p (int regnum) 44 { 45 return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM); 46 } 47 48 static int 49 hppaobsd_fpregset_supplies_p (int regnum) 50 { 51 return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM); 52 } 53 54 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ 55 56 static void 57 hppaobsd_supply_gregset (struct regcache *regcache, const void *gregs) 58 { 59 gdb_byte zero[4] = { 0 }; 60 const char *regs = gregs; 61 int regnum; 62 63 regcache->raw_supply (HPPA_R0_REGNUM, &zero); 64 for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++) 65 regcache->raw_supply (regnum, regs + regnum * 4); 66 67 if (sizeof(struct reg) >= 46 * 4) 68 { 69 regcache->raw_supply (HPPA_IPSW_REGNUM, regs); 70 regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4); 71 regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); 72 regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); 73 regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 74 regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 75 regcache->raw_supply (HPPA_SR0_REGNUM, regs + 37 * 4); 76 regcache->raw_supply (HPPA_SR1_REGNUM, regs + 38 * 4); 77 regcache->raw_supply (HPPA_SR2_REGNUM, regs + 39 * 4); 78 regcache->raw_supply (HPPA_SR3_REGNUM, regs + 40 * 4); 79 regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4); 80 regcache->raw_supply (HPPA_SR5_REGNUM, regs + 42 * 4); 81 regcache->raw_supply (HPPA_SR6_REGNUM, regs + 43 * 4); 82 regcache->raw_supply (HPPA_SR7_REGNUM, regs + 44 * 4); 83 regcache->raw_supply (HPPA_CR26_REGNUM, regs + 45 * 4); 84 regcache->raw_supply (HPPA_CR27_REGNUM, regs + 46 * 4); 85 } 86 else 87 { 88 regcache->raw_supply (HPPA_SAR_REGNUM, regs); 89 regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); 90 regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); 91 } 92 } 93 94 /* Supply the floating-point registers stored in FPREGS to REGCACHE. */ 95 96 static void 97 hppaobsd_supply_fpregset (struct regcache *regcache, const void *fpregs) 98 { 99 const char *regs = fpregs; 100 int regnum; 101 102 for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM; 103 regnum += 2, regs += 8) 104 { 105 regcache->raw_supply (regnum, regs); 106 regcache->raw_supply (regnum + 1, regs + 4); 107 } 108 } 109 110 /* Collect the general-purpose registers from REGCACHE and store them 111 in GREGS. */ 112 113 static void 114 hppaobsd_collect_gregset (const struct regcache *regcache, 115 void *gregs, int regnum) 116 { 117 char *regs = gregs; 118 int i; 119 120 for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++) 121 { 122 if (regnum == -1 || regnum == i) 123 regcache->raw_collect (i, regs + i * 4); 124 } 125 126 if (sizeof(struct reg) >= 46 * 4) 127 { 128 if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) 129 regcache->raw_collect (HPPA_IPSW_REGNUM, regs); 130 if (regnum == -1 || regnum == HPPA_SAR_REGNUM) 131 regcache->raw_collect (HPPA_SAR_REGNUM, regs + 32 * 4); 132 if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM) 133 regcache->raw_collect (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); 134 if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM) 135 regcache->raw_collect (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); 136 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) 137 regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 138 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) 139 regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 140 if (regnum == -1 || regnum == HPPA_SR0_REGNUM) 141 regcache->raw_collect (HPPA_SR0_REGNUM, regs + 37 * 4); 142 if (regnum == -1 || regnum == HPPA_SR1_REGNUM) 143 regcache->raw_collect (HPPA_SR1_REGNUM, regs + 38 * 4); 144 if (regnum == -1 || regnum == HPPA_SR2_REGNUM) 145 regcache->raw_collect (HPPA_SR2_REGNUM, regs + 39 * 4); 146 if (regnum == -1 || regnum == HPPA_SR3_REGNUM) 147 regcache->raw_collect (HPPA_SR3_REGNUM, regs + 40 * 4); 148 if (regnum == -1 || regnum == HPPA_SR4_REGNUM) 149 regcache->raw_collect (HPPA_SR4_REGNUM, regs + 41 * 4); 150 if (regnum == -1 || regnum == HPPA_SR5_REGNUM) 151 regcache->raw_collect (HPPA_SR5_REGNUM, regs + 42 * 4); 152 if (regnum == -1 || regnum == HPPA_SR6_REGNUM) 153 regcache->raw_collect (HPPA_SR6_REGNUM, regs + 43 * 4); 154 if (regnum == -1 || regnum == HPPA_SR7_REGNUM) 155 regcache->raw_collect (HPPA_SR7_REGNUM, regs + 44 * 4); 156 if (regnum == -1 || regnum == HPPA_CR26_REGNUM) 157 regcache->raw_collect (HPPA_CR26_REGNUM, regs + 45 * 4); 158 if (regnum == -1 || regnum == HPPA_CR27_REGNUM) 159 regcache->raw_collect (HPPA_CR27_REGNUM, regs + 46 * 4); 160 } 161 else 162 { 163 if (regnum == -1 || regnum == HPPA_SAR_REGNUM) 164 regcache->raw_collect (HPPA_SAR_REGNUM, regs); 165 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) 166 regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); 167 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) 168 regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); 169 } 170 } 171 172 /* Collect the floating-point registers from REGCACHE and store them 173 in FPREGS. */ 174 175 static void 176 hppaobsd_collect_fpregset (struct regcache *regcache, 177 void *fpregs, int regnum) 178 { 179 char *regs = fpregs; 180 int i; 181 182 for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8) 183 { 184 if (regnum == -1 || regnum == i || regnum == i + 1) 185 { 186 regcache->raw_collect (i, regs); 187 regcache->raw_collect (i + 1, regs + 4); 188 } 189 } 190 } 191 192 193 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 194 for all registers (including the floating-point registers). */ 195 196 void 197 hppa_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) 198 { 199 pid_t pid = regcache->ptid ().pid (); 200 201 if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum)) 202 { 203 struct reg regs; 204 205 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 206 perror_with_name (_("Couldn't get registers")); 207 208 hppaobsd_supply_gregset (regcache, ®s); 209 } 210 211 if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum)) 212 { 213 struct fpreg fpregs; 214 215 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 216 perror_with_name (_("Couldn't get floating point status")); 217 218 hppaobsd_supply_fpregset (regcache, &fpregs); 219 } 220 } 221 222 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 223 this for all registers (including the floating-point registers). */ 224 225 void 226 hppa_obsd_nat_target::store_registers (struct regcache *regcache, int regnum) 227 { 228 if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum)) 229 { 230 struct reg regs; 231 232 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 233 perror_with_name (_("Couldn't get registers")); 234 235 hppaobsd_collect_gregset (regcache, ®s, regnum); 236 237 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 238 perror_with_name (_("Couldn't write registers")); 239 } 240 241 if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum)) 242 { 243 struct fpreg fpregs; 244 245 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 246 perror_with_name (_("Couldn't get floating point status")); 247 248 hppaobsd_collect_fpregset (regcache, &fpregs, regnum); 249 250 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 251 perror_with_name (_("Couldn't write floating point status")); 252 } 253 } 254 255 void _initialize_hppaobsd_nat (); 256 void 257 _initialize_hppaobsd_nat () 258 { 259 add_inf_child_target (&the_hppa_obsd_nat_target); 260 } 261