| 1 | /* Target-dependent code for NetBSD/sh. |
| 2 | |
| 3 | Copyright (C) 2002, 2003, 2006, 2007 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Wasabi Systems, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "defs.h" |
| 25 | #include "gdbcore.h" |
| 26 | #include "regcache.h" |
| 27 | #include "regset.h" |
| 28 | #include "value.h" |
| 29 | #include "osabi.h" |
| 30 | |
| 31 | #include "gdb_assert.h" |
| 32 | #include "gdb_string.h" |
| 33 | |
| 34 | #include "sh-tdep.h" |
| 35 | #include "shnbsd-tdep.h" |
| 36 | #include "solib-svr4.h" |
| 37 | |
| 38 | /* Convert an r0-r15 register number into an offset into a ptrace |
| 39 | register structure. */ |
| 40 | static const int regmap[] = |
| 41 | { |
| 42 | (20 * 4), /* r0 */ |
| 43 | (19 * 4), /* r1 */ |
| 44 | (18 * 4), /* r2 */ |
| 45 | (17 * 4), /* r3 */ |
| 46 | (16 * 4), /* r4 */ |
| 47 | (15 * 4), /* r5 */ |
| 48 | (14 * 4), /* r6 */ |
| 49 | (13 * 4), /* r7 */ |
| 50 | (12 * 4), /* r8 */ |
| 51 | (11 * 4), /* r9 */ |
| 52 | (10 * 4), /* r10 */ |
| 53 | ( 9 * 4), /* r11 */ |
| 54 | ( 8 * 4), /* r12 */ |
| 55 | ( 7 * 4), /* r13 */ |
| 56 | ( 6 * 4), /* r14 */ |
| 57 | ( 5 * 4), /* r15 */ |
| 58 | }; |
| 59 | |
| 60 | /* Sizeof `struct reg' in <machine/reg.h>. */ |
| 61 | #define SHNBSD_SIZEOF_GREGS (21 * 4) |
| 62 | |
| 63 | /* Supply register REGNUM from the buffer specified by GREGS and LEN |
| 64 | in the general-purpose register set REGSET to register cache |
| 65 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 66 | |
| 67 | static void |
| 68 | shnbsd_supply_gregset (const struct regset *regset, |
| 69 | struct regcache *regcache, |
| 70 | int regnum, const void *gregs, size_t len) |
| 71 | { |
| 72 | const gdb_byte *regs = gregs; |
| 73 | int i; |
| 74 | |
| 75 | gdb_assert (len >= SHNBSD_SIZEOF_GREGS); |
| 76 | |
| 77 | if (regnum == gdbarch_pc_regnum (current_gdbarch) || regnum == -1) |
| 78 | regcache_raw_supply (regcache, |
| 79 | gdbarch_pc_regnum (current_gdbarch), |
| 80 | regs + (0 * 4)); |
| 81 | |
| 82 | if (regnum == SR_REGNUM || regnum == -1) |
| 83 | regcache_raw_supply (regcache, SR_REGNUM, regs + (1 * 4)); |
| 84 | |
| 85 | if (regnum == PR_REGNUM || regnum == -1) |
| 86 | regcache_raw_supply (regcache, PR_REGNUM, regs + (2 * 4)); |
| 87 | |
| 88 | if (regnum == MACH_REGNUM || regnum == -1) |
| 89 | regcache_raw_supply (regcache, MACH_REGNUM, regs + (3 * 4)); |
| 90 | |
| 91 | if (regnum == MACL_REGNUM || regnum == -1) |
| 92 | regcache_raw_supply (regcache, MACL_REGNUM, regs + (4 * 4)); |
| 93 | |
| 94 | for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++) |
| 95 | { |
| 96 | if (regnum == i || regnum == -1) |
| 97 | regcache_raw_supply (regcache, i, regs + regmap[i - R0_REGNUM]); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | /* Collect register REGNUM in the general-purpose register set |
| 102 | REGSET. from register cache REGCACHE into the buffer specified by |
| 103 | GREGS and LEN. If REGNUM is -1, do this for all registers in |
| 104 | REGSET. */ |
| 105 | |
| 106 | static void |
| 107 | shnbsd_collect_gregset (const struct regset *regset, |
| 108 | const struct regcache *regcache, |
| 109 | int regnum, void *gregs, size_t len) |
| 110 | { |
| 111 | gdb_byte *regs = gregs; |
| 112 | int i; |
| 113 | |
| 114 | gdb_assert (len >= SHNBSD_SIZEOF_GREGS); |
| 115 | |
| 116 | if (regnum == gdbarch_pc_regnum (current_gdbarch) || regnum == -1) |
| 117 | regcache_raw_collect (regcache, gdbarch_pc_regnum (current_gdbarch), |
| 118 | regs + (0 * 4)); |
| 119 | |
| 120 | if (regnum == SR_REGNUM || regnum == -1) |
| 121 | regcache_raw_collect (regcache, SR_REGNUM, regs + (1 * 4)); |
| 122 | |
| 123 | if (regnum == PR_REGNUM || regnum == -1) |
| 124 | regcache_raw_collect (regcache, PR_REGNUM, regs + (2 * 4)); |
| 125 | |
| 126 | if (regnum == MACH_REGNUM || regnum == -1) |
| 127 | regcache_raw_collect (regcache, MACH_REGNUM, regs + (3 * 4)); |
| 128 | |
| 129 | if (regnum == MACL_REGNUM || regnum == -1) |
| 130 | regcache_raw_collect (regcache, MACL_REGNUM, regs + (4 * 4)); |
| 131 | |
| 132 | for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++) |
| 133 | { |
| 134 | if (regnum == i || regnum == -1) |
| 135 | regcache_raw_collect (regcache, i, regs + regmap[i - R0_REGNUM]); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /* SH register sets. */ |
| 140 | |
| 141 | static struct regset shnbsd_gregset = |
| 142 | { |
| 143 | NULL, |
| 144 | shnbsd_supply_gregset, |
| 145 | shnbsd_collect_gregset |
| 146 | }; |
| 147 | |
| 148 | /* Return the appropriate register set for the core section identified |
| 149 | by SECT_NAME and SECT_SIZE. */ |
| 150 | |
| 151 | const struct regset * |
| 152 | shnbsd_regset_from_core_section (struct gdbarch *gdbarch, |
| 153 | const char *sect_name, size_t sect_size) |
| 154 | { |
| 155 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= SHNBSD_SIZEOF_GREGS) |
| 156 | return &shnbsd_gregset; |
| 157 | |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | void |
| 162 | shnbsd_supply_reg (struct regcache *regcache, const char *regs, int regnum) |
| 163 | { |
| 164 | shnbsd_supply_gregset (&shnbsd_gregset, regcache, regnum, |
| 165 | regs, SHNBSD_SIZEOF_GREGS); |
| 166 | } |
| 167 | |
| 168 | void |
| 169 | shnbsd_fill_reg (const struct regcache *regcache, char *regs, int regnum) |
| 170 | { |
| 171 | shnbsd_collect_gregset (&shnbsd_gregset, regcache, regnum, |
| 172 | regs, SHNBSD_SIZEOF_GREGS); |
| 173 | } |
| 174 | \f |
| 175 | |
| 176 | static void |
| 177 | shnbsd_init_abi (struct gdbarch_info info, |
| 178 | struct gdbarch *gdbarch) |
| 179 | { |
| 180 | set_gdbarch_regset_from_core_section |
| 181 | (gdbarch, shnbsd_regset_from_core_section); |
| 182 | |
| 183 | set_solib_svr4_fetch_link_map_offsets |
| 184 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); |
| 185 | } |
| 186 | \f |
| 187 | |
| 188 | /* OpenBSD uses uses the traditional NetBSD core file format, even for |
| 189 | ports that use ELF. */ |
| 190 | #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF |
| 191 | |
| 192 | static enum gdb_osabi |
| 193 | shnbsd_core_osabi_sniffer (bfd *abfd) |
| 194 | { |
| 195 | if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) |
| 196 | return GDB_OSABI_NETBSD_CORE; |
| 197 | |
| 198 | return GDB_OSABI_UNKNOWN; |
| 199 | } |
| 200 | |
| 201 | void |
| 202 | _initialize_shnbsd_tdep (void) |
| 203 | { |
| 204 | /* BFD doesn't set a flavour for NetBSD style a.out core files. */ |
| 205 | gdbarch_register_osabi_sniffer (bfd_arch_sh, bfd_target_unknown_flavour, |
| 206 | shnbsd_core_osabi_sniffer); |
| 207 | |
| 208 | gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_NETBSD_ELF, |
| 209 | shnbsd_init_abi); |
| 210 | gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_OPENBSD_ELF, |
| 211 | shnbsd_init_abi); |
| 212 | } |