1 /* Native-dependent code for OpenBSD/hppa. 2 3 Copyright (C) 2004-2017 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 static int 35 hppaobsd_gregset_supplies_p (int regnum) 36 { 37 return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM); 38 } 39 40 static int 41 hppaobsd_fpregset_supplies_p (int regnum) 42 { 43 return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM); 44 } 45 46 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ 47 48 static void 49 hppaobsd_supply_gregset (struct regcache *regcache, const void *gregs) 50 { 51 gdb_byte zero[4] = { 0 }; 52 const char *regs = gregs; 53 int regnum; 54 55 regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero); 56 for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++) 57 regcache_raw_supply (regcache, regnum, regs + regnum * 4); 58 59 if (sizeof(struct reg) >= 46 * 4) 60 { 61 regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs); 62 regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4); 63 regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); 64 regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); 65 regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 66 regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 67 regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4); 68 regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4); 69 regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4); 70 regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4); 71 regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4); 72 regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4); 73 regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4); 74 regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4); 75 regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4); 76 regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4); 77 } 78 else 79 { 80 regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs); 81 regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); 82 regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); 83 } 84 } 85 86 /* Supply the floating-point registers stored in FPREGS to REGCACHE. */ 87 88 static void 89 hppaobsd_supply_fpregset (struct regcache *regcache, const void *fpregs) 90 { 91 const char *regs = fpregs; 92 int regnum; 93 94 for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM; 95 regnum += 2, regs += 8) 96 { 97 regcache_raw_supply (regcache, regnum, regs); 98 regcache_raw_supply (regcache, regnum + 1, regs + 4); 99 } 100 } 101 102 /* Collect the general-purpose registers from REGCACHE and store them 103 in GREGS. */ 104 105 static void 106 hppaobsd_collect_gregset (const struct regcache *regcache, 107 void *gregs, int regnum) 108 { 109 char *regs = gregs; 110 int i; 111 112 for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++) 113 { 114 if (regnum == -1 || regnum == i) 115 regcache_raw_collect (regcache, i, regs + i * 4); 116 } 117 118 if (sizeof(struct reg) >= 46 * 4) 119 { 120 if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) 121 regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs); 122 if (regnum == -1 || regnum == HPPA_SAR_REGNUM) 123 regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4); 124 if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM) 125 regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); 126 if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM) 127 regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); 128 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) 129 regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); 130 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) 131 regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); 132 if (regnum == -1 || regnum == HPPA_SR0_REGNUM) 133 regcache_raw_collect (regcache, HPPA_SR0_REGNUM, regs + 37 * 4); 134 if (regnum == -1 || regnum == HPPA_SR1_REGNUM) 135 regcache_raw_collect (regcache, HPPA_SR1_REGNUM, regs + 38 * 4); 136 if (regnum == -1 || regnum == HPPA_SR2_REGNUM) 137 regcache_raw_collect (regcache, HPPA_SR2_REGNUM, regs + 39 * 4); 138 if (regnum == -1 || regnum == HPPA_SR3_REGNUM) 139 regcache_raw_collect (regcache, HPPA_SR3_REGNUM, regs + 40 * 4); 140 if (regnum == -1 || regnum == HPPA_SR4_REGNUM) 141 regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4); 142 if (regnum == -1 || regnum == HPPA_SR5_REGNUM) 143 regcache_raw_collect (regcache, HPPA_SR5_REGNUM, regs + 42 * 4); 144 if (regnum == -1 || regnum == HPPA_SR6_REGNUM) 145 regcache_raw_collect (regcache, HPPA_SR6_REGNUM, regs + 43 * 4); 146 if (regnum == -1 || regnum == HPPA_SR7_REGNUM) 147 regcache_raw_collect (regcache, HPPA_SR7_REGNUM, regs + 44 * 4); 148 if (regnum == -1 || regnum == HPPA_CR26_REGNUM) 149 regcache_raw_collect (regcache, HPPA_CR26_REGNUM, regs + 45 * 4); 150 if (regnum == -1 || regnum == HPPA_CR27_REGNUM) 151 regcache_raw_collect (regcache, HPPA_CR27_REGNUM, regs + 46 * 4); 152 } 153 else 154 { 155 if (regnum == -1 || regnum == HPPA_SAR_REGNUM) 156 regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs); 157 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) 158 regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); 159 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) 160 regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); 161 } 162 } 163 164 /* Collect the floating-point registers from REGCACHE and store them 165 in FPREGS. */ 166 167 static void 168 hppaobsd_collect_fpregset (struct regcache *regcache, 169 void *fpregs, int regnum) 170 { 171 char *regs = fpregs; 172 int i; 173 174 for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8) 175 { 176 if (regnum == -1 || regnum == i || regnum == i + 1) 177 { 178 regcache_raw_collect (regcache, i, regs); 179 regcache_raw_collect (regcache, i + 1, regs + 4); 180 } 181 } 182 } 183 184 185 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 186 for all registers (including the floating-point registers). */ 187 188 static void 189 hppaobsd_fetch_registers (struct target_ops *ops, 190 struct regcache *regcache, int regnum) 191 { 192 pid_t pid = ptid_get_pid (regcache_get_ptid (regcache)); 193 194 if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum)) 195 { 196 struct reg regs; 197 198 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 199 perror_with_name (_("Couldn't get registers")); 200 201 hppaobsd_supply_gregset (regcache, ®s); 202 } 203 204 if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum)) 205 { 206 struct fpreg fpregs; 207 208 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 209 perror_with_name (_("Couldn't get floating point status")); 210 211 hppaobsd_supply_fpregset (regcache, &fpregs); 212 } 213 } 214 215 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 216 this for all registers (including the floating-point registers). */ 217 218 static void 219 hppaobsd_store_registers (struct target_ops *ops, 220 struct regcache *regcache, int regnum) 221 { 222 if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum)) 223 { 224 struct reg regs; 225 226 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 227 perror_with_name (_("Couldn't get registers")); 228 229 hppaobsd_collect_gregset (regcache, ®s, regnum); 230 231 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 232 perror_with_name (_("Couldn't write registers")); 233 } 234 235 if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum)) 236 { 237 struct fpreg fpregs; 238 239 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 240 perror_with_name (_("Couldn't get floating point status")); 241 242 hppaobsd_collect_fpregset (regcache, &fpregs, regnum); 243 244 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 245 perror_with_name (_("Couldn't write floating point status")); 246 } 247 } 248 249 /* Provide a prototype to silence -Wmissing-prototypes. */ 250 void _initialize_hppaobsd_nat (void); 251 252 void 253 _initialize_hppaobsd_nat (void) 254 { 255 struct target_ops *t; 256 257 t = inf_ptrace_target (); 258 t->to_fetch_registers = hppaobsd_fetch_registers; 259 t->to_store_registers = hppaobsd_store_registers; 260 obsd_add_target (t); 261 } 262