| 1 | /* Native-dependent code for OpenBSD/hppa. |
| 2 | |
| 3 | Copyright (C) 2004-2019 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 | \f |
| 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 |
| 256 | _initialize_hppaobsd_nat (void) |
| 257 | { |
| 258 | add_inf_child_target (&the_hppa_obsd_nat_target); |
| 259 | } |