| 1 | /* Target-dependent code for NetBSD/hppa |
| 2 | |
| 3 | Copyright (C) 2008, 2009 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 "trad-frame.h" |
| 26 | #include "tramp-frame.h" |
| 27 | |
| 28 | #include "gdb_assert.h" |
| 29 | #include "gdb_string.h" |
| 30 | |
| 31 | #include "hppa-tdep.h" |
| 32 | #include "hppabsd-tdep.h" |
| 33 | |
| 34 | /* From <machine/mcontext.h>. */ |
| 35 | static int hppanbsd_mc_reg_offset[] = |
| 36 | { |
| 37 | /* r0 ... r31 */ |
| 38 | -1, 1 * 4, 2 * 4, 3 * 4, |
| 39 | 4 * 4, 5 * 4, 6 * 4, 7 * 4, |
| 40 | 8 * 4, 9 * 4, 10 * 4, 11 * 4, |
| 41 | 12 * 4, 13 * 4, 14 * 4, 15 * 4, |
| 42 | 16 * 4, 17 * 4, 18 * 4, 19 * 4, |
| 43 | 20 * 4, 21 * 4, 22 * 4, 23 * 4, |
| 44 | 24 * 4, 25 * 4, 26 * 4, 27 * 4, |
| 45 | 28 * 4, 29 * 4, 30 * 4, 31 * 4, |
| 46 | |
| 47 | 32 * 4, /* HPPA_SAR_REGNUM */ |
| 48 | 35 * 4, /* HPPA_PCOQ_HEAD_REGNUM */ |
| 49 | 33 * 4, /* HPPA_PCSQ_HEAD_REGNUM */ |
| 50 | 36 * 4, /* HPPA_PCOQ_TAIL_REGNUM */ |
| 51 | 34 * 4, /* HPPA_PCSQ_TAIL_REGNUM */ |
| 52 | -1, /* HPPA_EIEM_REGNUM */ |
| 53 | -1, /* HPPA_IIR_REGNUM */ |
| 54 | -1, /* HPPA_ISR_REGNUM */ |
| 55 | -1, /* HPPA_IOR_REGNUM */ |
| 56 | 0 * 4, /* HPPA_IPSW_REGNUM */ |
| 57 | -1, /* spare? */ |
| 58 | 41 * 4, /* HPPA_SR4_REGNUM */ |
| 59 | 37 * 4, /* sr0 */ |
| 60 | 38 * 4, /* sr1 */ |
| 61 | 39 * 4, /* sr2 */ |
| 62 | 40 * 4, /* sr3 */ |
| 63 | |
| 64 | /* more tbd */ |
| 65 | }; |
| 66 | |
| 67 | static void hppanbsd_sigtramp_cache_init (const struct tramp_frame *, |
| 68 | struct frame_info *, |
| 69 | struct trad_frame_cache *, |
| 70 | CORE_ADDR); |
| 71 | |
| 72 | static const struct tramp_frame hppanbsd_sigtramp_si4 = |
| 73 | { |
| 74 | SIGTRAMP_FRAME, |
| 75 | 4, |
| 76 | { |
| 77 | { 0xc7d7c012, -1 }, /* bb,>=,n %arg3, 30, 1f */ |
| 78 | { 0xd6e01c1e, -1 }, /* depwi 0,31,2,%arg3 */ |
| 79 | { 0x0ee81093, -1 }, /* ldw 4(%arg3), %r19 */ |
| 80 | { 0x0ee01097, -1 }, /* ldw 0(%arg3), %arg3 */ |
| 81 | /* 1: */ |
| 82 | { 0xe8404000, -1 }, /* blr %r0, %rp */ |
| 83 | { 0xeae0c002, -1 }, /* bv,n %r0(%arg3) */ |
| 84 | { 0x08000240, -1 }, /* nop */ |
| 85 | |
| 86 | { 0x0803025a, -1 }, /* copy %r3, %arg0 */ |
| 87 | { 0x20200801, -1 }, /* ldil -40000000, %r1 */ |
| 88 | { 0xe420e008, -1 }, /* be,l 4(%sr7, %r1), %sr0, %r31 */ |
| 89 | { 0x34160268, -1 }, /* ldi 134, %t1 ; SYS_setcontext */ |
| 90 | |
| 91 | { 0x081c025a, -1 }, /* copy ret0, %arg0 */ |
| 92 | { 0x20200801, -1 }, /* ldil -40000000, %r1 */ |
| 93 | { 0xe420e008, -1 }, /* be,l 4(%sr7, %r1), %sr0, %r31 */ |
| 94 | { 0x34160002, -1 }, /* ldi 1, %t1 ; SYS_exit */ |
| 95 | { TRAMP_SENTINEL_INSN, -1 } |
| 96 | }, |
| 97 | hppanbsd_sigtramp_cache_init |
| 98 | }; |
| 99 | |
| 100 | |
| 101 | static void |
| 102 | hppanbsd_sigtramp_cache_init (const struct tramp_frame *self, |
| 103 | struct frame_info *this_frame, |
| 104 | struct trad_frame_cache *this_cache, |
| 105 | CORE_ADDR func) |
| 106 | { |
| 107 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 108 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 109 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM); |
| 110 | CORE_ADDR base; |
| 111 | int *reg_offset; |
| 112 | int num_regs; |
| 113 | int i; |
| 114 | |
| 115 | reg_offset = hppanbsd_mc_reg_offset; |
| 116 | num_regs = ARRAY_SIZE (hppanbsd_mc_reg_offset); |
| 117 | |
| 118 | /* frame pointer */ |
| 119 | base = sp - 0x280; |
| 120 | /* offsetof(struct sigframe_siginfo, sf_uc) = 128 */ |
| 121 | base += 128; |
| 122 | /* offsetof(ucontext_t, uc_mcontext) == 40 */ |
| 123 | base += 40; |
| 124 | |
| 125 | for (i = 0; i < num_regs; i++) |
| 126 | if (reg_offset[i] != -1) |
| 127 | trad_frame_set_reg_addr (this_cache, i, base + reg_offset[i]); |
| 128 | |
| 129 | /* Construct the frame ID using the function start. */ |
| 130 | trad_frame_set_id (this_cache, frame_id_build (sp, func)); |
| 131 | } |
| 132 | |
| 133 | /* Core file support. */ |
| 134 | |
| 135 | /* Sizeof `struct reg' in <machine/reg.h>. */ |
| 136 | #define HPPANBSD_SIZEOF_GREGS (44 * 4) |
| 137 | |
| 138 | static int hppanbsd_reg_offset[] = |
| 139 | { |
| 140 | /* r0 ... r31 */ |
| 141 | -1, 1 * 4, 2 * 4, 3 * 4, |
| 142 | 4 * 4, 5 * 4, 6 * 4, 7 * 4, |
| 143 | 8 * 4, 9 * 4, 10 * 4, 11 * 4, |
| 144 | 12 * 4, 13 * 4, 14 * 4, 15 * 4, |
| 145 | 16 * 4, 17 * 4, 18 * 4, 19 * 4, |
| 146 | 20 * 4, 21 * 4, 22 * 4, 23 * 4, |
| 147 | 24 * 4, 25 * 4, 26 * 4, 27 * 4, |
| 148 | 28 * 4, 29 * 4, 30 * 4, 31 * 4, |
| 149 | |
| 150 | 32 * 4, /* HPPA_SAR_REGNUM */ |
| 151 | 35 * 4, /* HPPA_PCOQ_HEAD_REGNUM */ |
| 152 | 33 * 4, /* HPPA_PCSQ_HEAD_REGNUM */ |
| 153 | 36 * 4, /* HPPA_PCOQ_TAIL_REGNUM */ |
| 154 | 34 * 4, /* HPPA_PCSQ_TAIL_REGNUM */ |
| 155 | -1, /* HPPA_EIEM_REGNUM */ |
| 156 | -1, /* HPPA_IIR_REGNUM */ |
| 157 | -1, /* HPPA_ISR_REGNUM */ |
| 158 | -1, /* HPPA_IOR_REGNUM */ |
| 159 | 0 * 4, /* HPPA_IPSW_REGNUM */ |
| 160 | }; |
| 161 | |
| 162 | /* Supply register REGNUM from the buffer specified by GREGS and LEN |
| 163 | in the general-purpose register set REGSET to register cache |
| 164 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ |
| 165 | |
| 166 | static void |
| 167 | hppanbsd_supply_gregset (const struct regset *regset, struct regcache *regcache, |
| 168 | int regnum, const void *gregs, size_t len) |
| 169 | { |
| 170 | const gdb_byte *regs = gregs; |
| 171 | size_t offset; |
| 172 | int i; |
| 173 | |
| 174 | gdb_assert (len >= HPPANBSD_SIZEOF_GREGS); |
| 175 | |
| 176 | for (i = 0; i < ARRAY_SIZE (hppanbsd_reg_offset); i++) |
| 177 | if (hppanbsd_reg_offset[i] != -1) |
| 178 | if (regnum == -1 || regnum == i) |
| 179 | regcache_raw_supply (regcache, i, regs + hppanbsd_reg_offset[i]); |
| 180 | } |
| 181 | |
| 182 | /* NetBSD/hppa register set. */ |
| 183 | |
| 184 | static struct regset hppanbsd_gregset = |
| 185 | { |
| 186 | NULL, |
| 187 | hppanbsd_supply_gregset |
| 188 | }; |
| 189 | |
| 190 | /* Return the appropriate register set for the core section identified |
| 191 | by SECT_NAME and SECT_SIZE. */ |
| 192 | |
| 193 | static const struct regset * |
| 194 | hppanbsd_regset_from_core_section (struct gdbarch *gdbarch, |
| 195 | const char *sect_name, size_t sect_size) |
| 196 | { |
| 197 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPANBSD_SIZEOF_GREGS) |
| 198 | return &hppanbsd_gregset; |
| 199 | |
| 200 | return NULL; |
| 201 | } |
| 202 | \f |
| 203 | static void |
| 204 | hppanbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 205 | { |
| 206 | /* Obviously NetBSD is BSD-based. */ |
| 207 | hppabsd_init_abi (info, gdbarch); |
| 208 | |
| 209 | /* Core file support. */ |
| 210 | set_gdbarch_regset_from_core_section |
| 211 | (gdbarch, hppanbsd_regset_from_core_section); |
| 212 | |
| 213 | tramp_frame_prepend_unwinder (gdbarch, &hppanbsd_sigtramp_si4); |
| 214 | } |
| 215 | \f |
| 216 | |
| 217 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 218 | extern initialize_file_ftype _initialize_hppanbsd_tdep; |
| 219 | |
| 220 | void |
| 221 | _initialize_hppanbsd_tdep (void) |
| 222 | { |
| 223 | gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF, |
| 224 | hppanbsd_init_abi); |
| 225 | } |