1 /* Target-dependent code for Solaris UltraSPARC. 2 3 Copyright (C) 2003-2015 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 "gdbarch.h" 24 #include "symtab.h" 25 #include "objfiles.h" 26 #include "osabi.h" 27 #include "trad-frame.h" 28 #include "regset.h" 29 30 #include "sol2-tdep.h" 31 #include "sparc64-tdep.h" 32 #include "solib-svr4.h" 33 34 /* From <sys/regset.h>. */ 35 const struct sparc_gregmap sparc64_sol2_gregmap = 36 { 37 32 * 8, /* "tstate" */ 38 33 * 8, /* %pc */ 39 34 * 8, /* %npc */ 40 35 * 8, /* %y */ 41 -1, /* %wim */ 42 -1, /* %tbr */ 43 1 * 8, /* %g1 */ 44 16 * 8, /* %l0 */ 45 8 /* sizeof (%y) */ 46 }; 47 48 const struct sparc_fpregmap sparc64_sol2_fpregmap = 49 { 50 0 * 8, /* %f0 */ 51 33 * 8, /* %fsr */ 52 }; 53 54 static void 55 sparc64_sol2_supply_core_gregset (const struct regset *regset, 56 struct regcache *regcache, 57 int regnum, const void *gregs, size_t len) 58 { 59 sparc64_supply_gregset (&sparc64_sol2_gregmap, regcache, regnum, gregs); 60 } 61 62 static void 63 sparc64_sol2_collect_core_gregset (const struct regset *regset, 64 const struct regcache *regcache, 65 int regnum, void *gregs, size_t len) 66 { 67 sparc64_collect_gregset (&sparc64_sol2_gregmap, regcache, regnum, gregs); 68 } 69 70 static void 71 sparc64_sol2_supply_core_fpregset (const struct regset *regset, 72 struct regcache *regcache, 73 int regnum, const void *fpregs, size_t len) 74 { 75 sparc64_supply_fpregset (&sparc64_sol2_fpregmap, regcache, regnum, fpregs); 76 } 77 78 static void 79 sparc64_sol2_collect_core_fpregset (const struct regset *regset, 80 const struct regcache *regcache, 81 int regnum, void *fpregs, size_t len) 82 { 83 sparc64_collect_fpregset (&sparc64_sol2_fpregmap, regcache, regnum, fpregs); 84 } 85 86 static const struct regset sparc64_sol2_gregset = 87 { 88 NULL, 89 sparc64_sol2_supply_core_gregset, 90 sparc64_sol2_collect_core_gregset 91 }; 92 93 static const struct regset sparc64_sol2_fpregset = 94 { 95 NULL, 96 sparc64_sol2_supply_core_fpregset, 97 sparc64_sol2_collect_core_fpregset 98 }; 99 100 101 static struct sparc_frame_cache * 102 sparc64_sol2_sigtramp_frame_cache (struct frame_info *this_frame, 103 void **this_cache) 104 { 105 struct sparc_frame_cache *cache; 106 CORE_ADDR mcontext_addr, addr; 107 int regnum; 108 109 if (*this_cache) 110 return *this_cache; 111 112 cache = sparc_frame_cache (this_frame, this_cache); 113 gdb_assert (cache == *this_cache); 114 115 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); 116 117 /* The third argument is a pointer to an instance of `ucontext_t', 118 which has a member `uc_mcontext' that contains the saved 119 registers. */ 120 regnum = 121 (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM; 122 mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 64; 123 124 cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8; 125 cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8; 126 cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8; 127 cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8; 128 cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8; 129 cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8; 130 131 /* Since %g0 is always zero, keep the identity encoding. */ 132 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8; 133 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) 134 cache->saved_regs[regnum].addr = addr; 135 136 if (get_frame_memory_unsigned (this_frame, mcontext_addr + 21 * 8, 8)) 137 { 138 /* The register windows haven't been flushed. */ 139 for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) 140 trad_frame_set_unknown (cache->saved_regs, regnum); 141 } 142 else 143 { 144 CORE_ADDR sp; 145 146 addr = cache->saved_regs[SPARC_SP_REGNUM].addr; 147 sp = get_frame_memory_unsigned (this_frame, addr, 8); 148 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; 149 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) 150 cache->saved_regs[regnum].addr = addr; 151 } 152 153 return cache; 154 } 155 156 static void 157 sparc64_sol2_sigtramp_frame_this_id (struct frame_info *this_frame, 158 void **this_cache, 159 struct frame_id *this_id) 160 { 161 struct sparc_frame_cache *cache = 162 sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache); 163 164 (*this_id) = frame_id_build (cache->base, cache->pc); 165 } 166 167 static struct value * 168 sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *this_frame, 169 void **this_cache, 170 int regnum) 171 { 172 struct sparc_frame_cache *cache = 173 sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache); 174 175 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); 176 } 177 178 static int 179 sparc64_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self, 180 struct frame_info *this_frame, 181 void **this_cache) 182 { 183 CORE_ADDR pc = get_frame_pc (this_frame); 184 const char *name; 185 186 find_pc_partial_function (pc, &name, NULL, NULL); 187 if (sparc_sol2_pc_in_sigtramp (pc, name)) 188 return 1; 189 190 return 0; 191 } 192 static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind = 193 { 194 SIGTRAMP_FRAME, 195 default_frame_unwind_stop_reason, 196 sparc64_sol2_sigtramp_frame_this_id, 197 sparc64_sol2_sigtramp_frame_prev_register, 198 NULL, 199 sparc64_sol2_sigtramp_frame_sniffer 200 }; 201 202 203 204 void 205 sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 206 { 207 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 208 209 tdep->gregset = &sparc64_sol2_gregset; 210 tdep->sizeof_gregset = 304; 211 212 tdep->fpregset = &sparc64_sol2_fpregset; 213 tdep->sizeof_fpregset = 544; 214 215 frame_unwind_append_unwinder (gdbarch, &sparc64_sol2_sigtramp_frame_unwind); 216 217 sparc64_init_abi (info, gdbarch); 218 219 /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO) 220 compiler puts out 0 instead of the address in N_SO stabs. Starting with 221 SunPRO 3.0, the compiler does this for N_FUN stabs too. */ 222 set_gdbarch_sofun_address_maybe_missing (gdbarch, 1); 223 224 /* The Sun compilers also do "globalization"; see the comment in 225 sparc_sol2_static_transform_name for more information. */ 226 set_gdbarch_static_transform_name 227 (gdbarch, sparc_sol2_static_transform_name); 228 229 /* Solaris has SVR4-style shared libraries... */ 230 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); 231 set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver); 232 set_solib_svr4_fetch_link_map_offsets 233 (gdbarch, svr4_lp64_fetch_link_map_offsets); 234 235 /* ...which means that we need some special handling when doing 236 prologue analysis. */ 237 tdep->plt_entry_size = 16; 238 239 /* Solaris has kernel-assisted single-stepping support. */ 240 set_gdbarch_software_single_step (gdbarch, NULL); 241 242 /* How to print LWP PTIDs from core files. */ 243 set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str); 244 } 245 246 247 /* Provide a prototype to silence -Wmissing-prototypes. */ 248 void _initialize_sparc64_sol2_tdep (void); 249 250 void 251 _initialize_sparc64_sol2_tdep (void) 252 { 253 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, 254 GDB_OSABI_SOLARIS, sparc64_sol2_init_abi); 255 } 256