| 1 | /* Target-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 "osabi.h" |
| 22 | #include "regcache.h" |
| 23 | #include "regset.h" |
| 24 | |
| 25 | #include "hppa-tdep.h" |
| 26 | #include "hppa-bsd-tdep.h" |
| 27 | #include "gdbarch.h" |
| 28 | |
| 29 | /* Core file support. */ |
| 30 | |
| 31 | /* Sizeof `struct reg' in <machine/reg.h>. */ |
| 32 | #define HPPAOBSD_SIZEOF_GREGS (34 * 4) /* OpenBSD 5.1 and earlier. */ |
| 33 | #define HPPANBSD_SIZEOF_GREGS (46 * 4) /* NetBSD and OpenBSD 5.2 and later. */ |
| 34 | |
| 35 | /* Sizeof `struct fpreg' in <machine/reg.h>. */ |
| 36 | #define HPPAOBSD_SIZEOF_FPREGS (32 * 8) |
| 37 | |
| 38 | /* Supply register REGNUM from the buffer specified by GREGS and LEN |
| 39 | in the general-purpose register set REGSET to register cache |
| 40 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 41 | |
| 42 | static void |
| 43 | hppaobsd_supply_gregset (const struct regset *regset, |
| 44 | struct regcache *regcache, |
| 45 | int regnum, const void *gregs, size_t len) |
| 46 | { |
| 47 | gdb_byte zero[4] = { 0 }; |
| 48 | const gdb_byte *regs = (const gdb_byte *) gregs; |
| 49 | size_t offset; |
| 50 | int i; |
| 51 | |
| 52 | gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS); |
| 53 | |
| 54 | if (regnum == -1 || regnum == HPPA_R0_REGNUM) |
| 55 | regcache->raw_supply (HPPA_R0_REGNUM, &zero); |
| 56 | for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4) |
| 57 | { |
| 58 | if (regnum == -1 || regnum == i) |
| 59 | regcache->raw_supply (i, regs + offset); |
| 60 | } |
| 61 | |
| 62 | if (len >= HPPANBSD_SIZEOF_GREGS) |
| 63 | { |
| 64 | if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) |
| 65 | regcache->raw_supply (HPPA_IPSW_REGNUM, regs); |
| 66 | if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| 67 | regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4); |
| 68 | if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM) |
| 69 | regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); |
| 70 | if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM) |
| 71 | regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); |
| 72 | if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| 73 | regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); |
| 74 | if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| 75 | regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); |
| 76 | if (regnum == -1 || regnum == HPPA_SR0_REGNUM) |
| 77 | regcache->raw_supply (HPPA_SR0_REGNUM, regs + 37 * 4); |
| 78 | if (regnum == -1 || regnum == HPPA_SR1_REGNUM) |
| 79 | regcache->raw_supply (HPPA_SR1_REGNUM, regs + 38 * 4); |
| 80 | if (regnum == -1 || regnum == HPPA_SR2_REGNUM) |
| 81 | regcache->raw_supply (HPPA_SR2_REGNUM, regs + 39 * 4); |
| 82 | if (regnum == -1 || regnum == HPPA_SR3_REGNUM) |
| 83 | regcache->raw_supply (HPPA_SR3_REGNUM, regs + 40 * 4); |
| 84 | if (regnum == -1 || regnum == HPPA_SR4_REGNUM) |
| 85 | regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4); |
| 86 | if (regnum == -1 || regnum == HPPA_SR5_REGNUM) |
| 87 | regcache->raw_supply (HPPA_SR5_REGNUM, regs + 42 * 4); |
| 88 | if (regnum == -1 || regnum == HPPA_SR6_REGNUM) |
| 89 | regcache->raw_supply (HPPA_SR6_REGNUM, regs + 43 * 4); |
| 90 | if (regnum == -1 || regnum == HPPA_SR7_REGNUM) |
| 91 | regcache->raw_supply (HPPA_SR7_REGNUM, regs + 44 * 4); |
| 92 | if (regnum == -1 || regnum == HPPA_CR26_REGNUM) |
| 93 | regcache->raw_supply (HPPA_CR26_REGNUM, regs + 45 * 4); |
| 94 | if (regnum == -1 || regnum == HPPA_CR27_REGNUM) |
| 95 | regcache->raw_supply (HPPA_CR27_REGNUM, regs + 46 * 4); |
| 96 | } |
| 97 | else |
| 98 | { |
| 99 | if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| 100 | regcache->raw_supply (HPPA_SAR_REGNUM, regs); |
| 101 | if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| 102 | regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); |
| 103 | if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| 104 | regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /* Supply register REGNUM from the buffer specified by FPREGS and LEN |
| 109 | in the floating-point register set REGSET to register cache |
| 110 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 111 | |
| 112 | static void |
| 113 | hppaobsd_supply_fpregset (const struct regset *regset, |
| 114 | struct regcache *regcache, |
| 115 | int regnum, const void *fpregs, size_t len) |
| 116 | { |
| 117 | const gdb_byte *regs = (const gdb_byte *) fpregs; |
| 118 | int i; |
| 119 | |
| 120 | gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS); |
| 121 | |
| 122 | for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++) |
| 123 | { |
| 124 | if (regnum == i || regnum == -1) |
| 125 | regcache->raw_supply (i, regs + (i - HPPA_FP0_REGNUM) * 4); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* OpenBSD/hppa register sets. */ |
| 130 | |
| 131 | static const struct regset hppaobsd_gregset = |
| 132 | { |
| 133 | NULL, |
| 134 | hppaobsd_supply_gregset, |
| 135 | NULL, |
| 136 | REGSET_VARIABLE_SIZE |
| 137 | }; |
| 138 | |
| 139 | static const struct regset hppaobsd_fpregset = |
| 140 | { |
| 141 | NULL, |
| 142 | hppaobsd_supply_fpregset |
| 143 | }; |
| 144 | |
| 145 | /* Iterate over supported core file register note sections. */ |
| 146 | |
| 147 | static void |
| 148 | hppaobsd_iterate_over_regset_sections (struct gdbarch *gdbarch, |
| 149 | iterate_over_regset_sections_cb *cb, |
| 150 | void *cb_data, |
| 151 | const struct regcache *regcache) |
| 152 | { |
| 153 | cb (".reg", HPPAOBSD_SIZEOF_GREGS, HPPAOBSD_SIZEOF_GREGS, &hppaobsd_gregset, |
| 154 | NULL, cb_data); |
| 155 | cb (".reg2", HPPAOBSD_SIZEOF_FPREGS, HPPAOBSD_SIZEOF_FPREGS, |
| 156 | &hppaobsd_fpregset, NULL, cb_data); |
| 157 | } |
| 158 | \f |
| 159 | |
| 160 | static void |
| 161 | hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 162 | { |
| 163 | /* Obviously OpenBSD is BSD-based. */ |
| 164 | hppabsd_init_abi (info, gdbarch); |
| 165 | |
| 166 | /* Core file support. */ |
| 167 | set_gdbarch_iterate_over_regset_sections |
| 168 | (gdbarch, hppaobsd_iterate_over_regset_sections); |
| 169 | } |
| 170 | |
| 171 | void |
| 172 | _initialize_hppabsd_tdep (void) |
| 173 | { |
| 174 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD, |
| 175 | hppaobsd_init_abi); |
| 176 | } |