1/* Target-dependent code for FreeBSD/sparc64. 2 3 Copyright (C) 2003, 2004, 2005, 2007 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 "frame.h" 22#include "frame-unwind.h" 23#include "gdbcore.h" 24#include "osabi.h" 25#include "regcache.h" 26#include "regset.h" 27#include "target.h" 28#include "trad-frame.h" 29 30#include "gdb_assert.h" 31#include "gdb_string.h" 32 33#include "sparc64-tdep.h" 34#include "solib-svr4.h" 35 36/* From <machine/reg.h>. */ 37const struct sparc_gregset sparc64fbsd_gregset = 38{ 39 26 * 8, /* "tstate" */ 40 25 * 8, /* %pc */ 41 24 * 8, /* %npc */ 42 28 * 8, /* %y */ 43 16 * 8, /* %fprs */ 44 -1, 45 1 * 8, /* %g1 */ 46 -1, /* %l0 */ 47 8 /* sizeof (%y) */ 48}; 49 50 51static void 52sparc64fbsd_supply_gregset (const struct regset *regset, 53 struct regcache *regcache, 54 int regnum, const void *gregs, size_t len) 55{ 56 sparc64_supply_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs); 57} 58 59static void 60sparc64fbsd_collect_gregset (const struct regset *regset, 61 const struct regcache *regcache, 62 int regnum, void *gregs, size_t len) 63{ 64 sparc64_collect_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs); 65} 66 67static void 68sparc64fbsd_supply_fpregset (const struct regset *regset, 69 struct regcache *regcache, 70 int regnum, const void *fpregs, size_t len) 71{ 72 sparc64_supply_fpregset (regcache, regnum, fpregs); 73} 74 75static void 76sparc64fbsd_collect_fpregset (const struct regset *regset, 77 const struct regcache *regcache, 78 int regnum, void *fpregs, size_t len) 79{ 80 sparc64_collect_fpregset (regcache, regnum, fpregs); 81} 82 83 84/* Signal trampolines. */ 85 86static int 87sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) 88{ 89 return (name && strcmp (name, "__sigtramp") == 0); 90} 91 92static struct sparc_frame_cache * 93sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame, 94 void **this_cache) 95{ 96 struct sparc_frame_cache *cache; 97 CORE_ADDR addr, mcontext_addr, sp; 98 LONGEST fprs; 99 int regnum; 100 101 if (*this_cache) 102 return *this_cache; 103 104 cache = sparc_frame_cache (next_frame, this_cache); 105 gdb_assert (cache == *this_cache); 106 107 cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); 108 109 /* The third argument is a pointer to an instance of `ucontext_t', 110 which has a member `uc_mcontext' that contains the saved 111 registers. */ 112 addr = frame_unwind_register_unsigned (next_frame, SPARC_O2_REGNUM); 113 mcontext_addr = addr + 64; 114 115 /* The following registers travel in the `mc_local' slots of 116 `mcontext_t'. */ 117 addr = mcontext_addr + 16 * 8; 118 cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8; 119 cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8; 120 121 /* The following registers travel in the `mc_in' slots of 122 `mcontext_t'. */ 123 addr = mcontext_addr + 24 * 8; 124 cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8; 125 cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8; 126 cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8; 127 cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8; 128 129 /* The `global' and `out' registers travel in the `mc_global' and 130 `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is 131 always zero, keep the identity encoding. */ 132 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8; 133 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) 134 cache->saved_regs[regnum].addr = addr; 135 136 /* The `local' and `in' registers have been saved in the register 137 save area. */ 138 addr = cache->saved_regs[SPARC_SP_REGNUM].addr; 139 sp = get_frame_memory_unsigned (next_frame, addr, 8); 140 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; 141 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) 142 cache->saved_regs[regnum].addr = addr; 143 144 /* The floating-point registers are only saved if the FEF bit in 145 %fprs has been set. */ 146 147#define FPRS_FEF (1 << 2) 148 149 addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr; 150 fprs = get_frame_memory_unsigned (next_frame, addr, 8); 151 if (fprs & FPRS_FEF) 152 { 153 for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8; 154 regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) 155 cache->saved_regs[regnum].addr = addr; 156 157 for (regnum = SPARC64_F32_REGNUM; 158 regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) 159 cache->saved_regs[regnum].addr = addr; 160 } 161 162 return cache; 163} 164 165static void 166sparc64fbsd_sigtramp_frame_this_id (struct frame_info *next_frame, 167 void **this_cache, 168 struct frame_id *this_id) 169{ 170 struct sparc_frame_cache *cache = 171 sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); 172 173 (*this_id) = frame_id_build (cache->base, cache->pc); 174} 175 176static void 177sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame, 178 void **this_cache, 179 int regnum, int *optimizedp, 180 enum lval_type *lvalp, 181 CORE_ADDR *addrp, 182 int *realnump, gdb_byte *valuep) 183{ 184 struct sparc_frame_cache *cache = 185 sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); 186 187 trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum, 188 optimizedp, lvalp, addrp, realnump, valuep); 189} 190 191static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = 192{ 193 SIGTRAMP_FRAME, 194 sparc64fbsd_sigtramp_frame_this_id, 195 sparc64fbsd_sigtramp_frame_prev_register 196}; 197 198static const struct frame_unwind * 199sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) 200{ 201 CORE_ADDR pc = frame_pc_unwind (next_frame); 202 char *name; 203 204 find_pc_partial_function (pc, &name, NULL, NULL); 205 if (sparc64fbsd_pc_in_sigtramp (pc, name)) 206 return &sparc64fbsd_sigtramp_frame_unwind; 207 208 return NULL; 209} 210 211 212static void 213sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 214{ 215 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 216 217 tdep->gregset = regset_alloc (gdbarch, sparc64fbsd_supply_gregset, 218 sparc64fbsd_collect_gregset); 219 tdep->sizeof_gregset = 256; 220 221 tdep->fpregset = regset_alloc (gdbarch, sparc64fbsd_supply_fpregset, 222 sparc64fbsd_collect_fpregset); 223 tdep->sizeof_fpregset = 272; 224 225 frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); 226 227 sparc64_init_abi (info, gdbarch); 228 229 /* FreeBSD/sparc64 has SVR4-style shared libraries. */ 230 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); 231 set_solib_svr4_fetch_link_map_offsets 232 (gdbarch, svr4_lp64_fetch_link_map_offsets); 233} 234 235/* Provide a prototype to silence -Wmissing-prototypes. */ 236void _initialize_sparc64fbsd_tdep (void); 237 238void 239_initialize_sparc64fbsd_tdep (void) 240{ 241 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, 242 GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); 243} 244