| 1 | /* Target-dependent code for OpenBSD/hppa |
| 2 | |
| 3 | Copyright (C) 2004-2014 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 "gdb_assert.h" |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include "hppa-tdep.h" |
| 29 | #include "hppabsd-tdep.h" |
| 30 | |
| 31 | /* Core file support. */ |
| 32 | |
| 33 | /* Sizeof `struct reg' in <machine/reg.h>. */ |
| 34 | #define HPPAOBSD_SIZEOF_GREGS (34 * 4) /* OpenBSD 5.1 and earlier. */ |
| 35 | #define HPPANBSD_SIZEOF_GREGS (46 * 4) /* NetBSD and OpenBSD 5.2 and later. */ |
| 36 | |
| 37 | /* Sizeof `struct fpreg' in <machine/reg.h>. */ |
| 38 | #define HPPAOBSD_SIZEOF_FPREGS (32 * 8) |
| 39 | |
| 40 | /* Supply register REGNUM from the buffer specified by GREGS and LEN |
| 41 | in the general-purpose register set REGSET to register cache |
| 42 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 43 | |
| 44 | static void |
| 45 | hppaobsd_supply_gregset (const struct regset *regset, |
| 46 | struct regcache *regcache, |
| 47 | int regnum, const void *gregs, size_t len) |
| 48 | { |
| 49 | gdb_byte zero[4] = { 0 }; |
| 50 | const gdb_byte *regs = gregs; |
| 51 | size_t offset; |
| 52 | int i; |
| 53 | |
| 54 | gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS); |
| 55 | |
| 56 | if (regnum == -1 || regnum == HPPA_R0_REGNUM) |
| 57 | regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero); |
| 58 | for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4) |
| 59 | { |
| 60 | if (regnum == -1 || regnum == i) |
| 61 | regcache_raw_supply (regcache, i, regs + offset); |
| 62 | } |
| 63 | |
| 64 | if (len >= HPPANBSD_SIZEOF_GREGS) |
| 65 | { |
| 66 | if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) |
| 67 | regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs); |
| 68 | if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| 69 | regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4); |
| 70 | if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM) |
| 71 | regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); |
| 72 | if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM) |
| 73 | regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); |
| 74 | if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| 75 | regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); |
| 76 | if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| 77 | regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); |
| 78 | if (regnum == -1 || regnum == HPPA_SR0_REGNUM) |
| 79 | regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4); |
| 80 | if (regnum == -1 || regnum == HPPA_SR1_REGNUM) |
| 81 | regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4); |
| 82 | if (regnum == -1 || regnum == HPPA_SR2_REGNUM) |
| 83 | regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4); |
| 84 | if (regnum == -1 || regnum == HPPA_SR3_REGNUM) |
| 85 | regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4); |
| 86 | if (regnum == -1 || regnum == HPPA_SR4_REGNUM) |
| 87 | regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4); |
| 88 | if (regnum == -1 || regnum == HPPA_SR5_REGNUM) |
| 89 | regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4); |
| 90 | if (regnum == -1 || regnum == HPPA_SR6_REGNUM) |
| 91 | regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4); |
| 92 | if (regnum == -1 || regnum == HPPA_SR7_REGNUM) |
| 93 | regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4); |
| 94 | if (regnum == -1 || regnum == HPPA_CR26_REGNUM) |
| 95 | regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4); |
| 96 | if (regnum == -1 || regnum == HPPA_CR27_REGNUM) |
| 97 | regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4); |
| 98 | } |
| 99 | else |
| 100 | { |
| 101 | if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| 102 | regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs); |
| 103 | if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| 104 | regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); |
| 105 | if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| 106 | regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | /* Supply register REGNUM from the buffer specified by FPREGS and LEN |
| 111 | in the floating-point register set REGSET to register cache |
| 112 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 113 | |
| 114 | static void |
| 115 | hppaobsd_supply_fpregset (const struct regset *regset, |
| 116 | struct regcache *regcache, |
| 117 | int regnum, const void *fpregs, size_t len) |
| 118 | { |
| 119 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 120 | const gdb_byte *regs = fpregs; |
| 121 | int i; |
| 122 | |
| 123 | gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS); |
| 124 | |
| 125 | for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++) |
| 126 | { |
| 127 | if (regnum == i || regnum == -1) |
| 128 | regcache_raw_supply (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* OpenBSD/hppa register sets. */ |
| 133 | |
| 134 | static struct regset hppaobsd_gregset = |
| 135 | { |
| 136 | NULL, |
| 137 | hppaobsd_supply_gregset |
| 138 | }; |
| 139 | |
| 140 | static struct regset hppaobsd_fpregset = |
| 141 | { |
| 142 | NULL, |
| 143 | hppaobsd_supply_fpregset |
| 144 | }; |
| 145 | |
| 146 | /* Return the appropriate register set for the core section identified |
| 147 | by SECT_NAME and SECT_SIZE. */ |
| 148 | |
| 149 | static const struct regset * |
| 150 | hppaobsd_regset_from_core_section (struct gdbarch *gdbarch, |
| 151 | const char *sect_name, size_t sect_size) |
| 152 | { |
| 153 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPAOBSD_SIZEOF_GREGS) |
| 154 | return &hppaobsd_gregset; |
| 155 | |
| 156 | if (strcmp (sect_name, ".reg2") == 0 && sect_size >= HPPAOBSD_SIZEOF_FPREGS) |
| 157 | return &hppaobsd_fpregset; |
| 158 | |
| 159 | return NULL; |
| 160 | } |
| 161 | \f |
| 162 | |
| 163 | static void |
| 164 | hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 165 | { |
| 166 | /* Obviously OpenBSD is BSD-based. */ |
| 167 | hppabsd_init_abi (info, gdbarch); |
| 168 | |
| 169 | /* Core file support. */ |
| 170 | set_gdbarch_regset_from_core_section |
| 171 | (gdbarch, hppaobsd_regset_from_core_section); |
| 172 | } |
| 173 | \f |
| 174 | |
| 175 | /* OpenBSD uses uses the traditional NetBSD core file format, even for |
| 176 | ports that use ELF. */ |
| 177 | #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF |
| 178 | |
| 179 | static enum gdb_osabi |
| 180 | hppaobsd_core_osabi_sniffer (bfd *abfd) |
| 181 | { |
| 182 | if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) |
| 183 | return GDB_OSABI_NETBSD_CORE; |
| 184 | |
| 185 | return GDB_OSABI_UNKNOWN; |
| 186 | } |
| 187 | \f |
| 188 | |
| 189 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 190 | void _initialize_hppabsd_tdep (void); |
| 191 | |
| 192 | void |
| 193 | _initialize_hppabsd_tdep (void) |
| 194 | { |
| 195 | /* BFD doesn't set a flavour for NetBSD style a.out core files. */ |
| 196 | gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour, |
| 197 | hppaobsd_core_osabi_sniffer); |
| 198 | |
| 199 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF, |
| 200 | hppaobsd_init_abi); |
| 201 | } |