| 1 | /* Target-dependent code for OpenBSD/hppa |
| 2 | |
| 3 | Copyright (C) 2004-2013 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 "gdb_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) |
| 35 | |
| 36 | /* Sizeof `struct fpreg' in <machine/reg.h>. */ |
| 37 | #define HPPAOBSD_SIZEOF_FPREGS (32 * 8) |
| 38 | |
| 39 | /* Supply register REGNUM from the buffer specified by GREGS and LEN |
| 40 | in the general-purpose register set REGSET to register cache |
| 41 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 42 | |
| 43 | static void |
| 44 | hppaobsd_supply_gregset (const struct regset *regset, |
| 45 | struct regcache *regcache, |
| 46 | int regnum, const void *gregs, size_t len) |
| 47 | { |
| 48 | const gdb_byte *regs = gregs; |
| 49 | size_t offset; |
| 50 | int i; |
| 51 | |
| 52 | gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS); |
| 53 | |
| 54 | for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4) |
| 55 | { |
| 56 | if (regnum == -1 || regnum == i) |
| 57 | regcache_raw_supply (regcache, i, regs + offset); |
| 58 | } |
| 59 | |
| 60 | if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| 61 | regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs); |
| 62 | if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| 63 | regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); |
| 64 | if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| 65 | regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); |
| 66 | } |
| 67 | |
| 68 | /* Supply register REGNUM from the buffer specified by FPREGS and LEN |
| 69 | in the floating-point register set REGSET to register cache |
| 70 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 71 | |
| 72 | static void |
| 73 | hppaobsd_supply_fpregset (const struct regset *regset, |
| 74 | struct regcache *regcache, |
| 75 | int regnum, const void *fpregs, size_t len) |
| 76 | { |
| 77 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 78 | const gdb_byte *regs = fpregs; |
| 79 | int i; |
| 80 | |
| 81 | gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS); |
| 82 | |
| 83 | for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++) |
| 84 | { |
| 85 | if (regnum == i || regnum == -1) |
| 86 | regcache_raw_supply (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | /* OpenBSD/hppa register sets. */ |
| 91 | |
| 92 | static struct regset hppaobsd_gregset = |
| 93 | { |
| 94 | NULL, |
| 95 | hppaobsd_supply_gregset |
| 96 | }; |
| 97 | |
| 98 | static struct regset hppaobsd_fpregset = |
| 99 | { |
| 100 | NULL, |
| 101 | hppaobsd_supply_fpregset |
| 102 | }; |
| 103 | |
| 104 | /* Return the appropriate register set for the core section identified |
| 105 | by SECT_NAME and SECT_SIZE. */ |
| 106 | |
| 107 | static const struct regset * |
| 108 | hppaobsd_regset_from_core_section (struct gdbarch *gdbarch, |
| 109 | const char *sect_name, size_t sect_size) |
| 110 | { |
| 111 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPAOBSD_SIZEOF_GREGS) |
| 112 | return &hppaobsd_gregset; |
| 113 | |
| 114 | if (strcmp (sect_name, ".reg2") == 0 && sect_size >= HPPAOBSD_SIZEOF_FPREGS) |
| 115 | return &hppaobsd_fpregset; |
| 116 | |
| 117 | return NULL; |
| 118 | } |
| 119 | \f |
| 120 | |
| 121 | static void |
| 122 | hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 123 | { |
| 124 | /* Obviously OpenBSD is BSD-based. */ |
| 125 | hppabsd_init_abi (info, gdbarch); |
| 126 | |
| 127 | /* Core file support. */ |
| 128 | set_gdbarch_regset_from_core_section |
| 129 | (gdbarch, hppaobsd_regset_from_core_section); |
| 130 | } |
| 131 | \f |
| 132 | |
| 133 | /* OpenBSD uses uses the traditional NetBSD core file format, even for |
| 134 | ports that use ELF. */ |
| 135 | #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF |
| 136 | |
| 137 | static enum gdb_osabi |
| 138 | hppaobsd_core_osabi_sniffer (bfd *abfd) |
| 139 | { |
| 140 | if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) |
| 141 | return GDB_OSABI_NETBSD_CORE; |
| 142 | |
| 143 | return GDB_OSABI_UNKNOWN; |
| 144 | } |
| 145 | \f |
| 146 | |
| 147 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 148 | void _initialize_hppabsd_tdep (void); |
| 149 | |
| 150 | void |
| 151 | _initialize_hppabsd_tdep (void) |
| 152 | { |
| 153 | /* BFD doesn't set a flavour for NetBSD style a.out core files. */ |
| 154 | gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour, |
| 155 | hppaobsd_core_osabi_sniffer); |
| 156 | |
| 157 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF, |
| 158 | hppaobsd_init_abi); |
| 159 | } |