1 /* Target-dependent code for Solaris SPARC. 2 3 Copyright (C) 2003-2020 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 "symtab.h" 25 #include "objfiles.h" 26 #include "osabi.h" 27 #include "regcache.h" 28 #include "regset.h" 29 #include "target.h" 30 #include "trad-frame.h" 31 32 #include "sol2-tdep.h" 33 #include "sparc-tdep.h" 34 #include "solib-svr4.h" 35 36 /* From <sys/regset.h>. */ 37 const struct sparc_gregmap sparc32_sol2_gregmap = 38 { 39 32 * 4, /* %psr */ 40 33 * 4, /* %pc */ 41 34 * 4, /* %npc */ 42 35 * 4, /* %y */ 43 36 * 4, /* %wim */ 44 37 * 4, /* %tbr */ 45 1 * 4, /* %g1 */ 46 16 * 4, /* %l0 */ 47 }; 48 49 const struct sparc_fpregmap sparc32_sol2_fpregmap = 50 { 51 0 * 4, /* %f0 */ 52 33 * 4, /* %fsr */ 53 }; 54 55 static void 56 sparc32_sol2_supply_core_gregset (const struct regset *regset, 57 struct regcache *regcache, 58 int regnum, const void *gregs, size_t len) 59 { 60 sparc32_supply_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs); 61 } 62 63 static void 64 sparc32_sol2_collect_core_gregset (const struct regset *regset, 65 const struct regcache *regcache, 66 int regnum, void *gregs, size_t len) 67 { 68 sparc32_collect_gregset (&sparc32_sol2_gregmap, regcache, regnum, gregs); 69 } 70 71 static void 72 sparc32_sol2_supply_core_fpregset (const struct regset *regset, 73 struct regcache *regcache, 74 int regnum, const void *fpregs, size_t len) 75 { 76 sparc32_supply_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs); 77 } 78 79 static void 80 sparc32_sol2_collect_core_fpregset (const struct regset *regset, 81 const struct regcache *regcache, 82 int regnum, void *fpregs, size_t len) 83 { 84 sparc32_collect_fpregset (&sparc32_sol2_fpregmap, regcache, regnum, fpregs); 85 } 86 87 static const struct regset sparc32_sol2_gregset = 88 { 89 NULL, 90 sparc32_sol2_supply_core_gregset, 91 sparc32_sol2_collect_core_gregset 92 }; 93 94 static const struct regset sparc32_sol2_fpregset = 95 { 96 NULL, 97 sparc32_sol2_supply_core_fpregset, 98 sparc32_sol2_collect_core_fpregset 99 }; 100 101 102 static struct sparc_frame_cache * 103 sparc32_sol2_sigtramp_frame_cache (struct frame_info *this_frame, 104 void **this_cache) 105 { 106 struct sparc_frame_cache *cache; 107 CORE_ADDR mcontext_addr, addr; 108 int regnum; 109 110 if (*this_cache) 111 return (struct sparc_frame_cache *) *this_cache; 112 113 cache = sparc_frame_cache (this_frame, this_cache); 114 gdb_assert (cache == *this_cache); 115 116 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); 117 118 /* The third argument is a pointer to an instance of `ucontext_t', 119 which has a member `uc_mcontext' that contains the saved 120 registers. */ 121 regnum = 122 (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM; 123 mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 40; 124 125 cache->saved_regs[SPARC32_PSR_REGNUM].addr = mcontext_addr + 0 * 4; 126 cache->saved_regs[SPARC32_PC_REGNUM].addr = mcontext_addr + 1 * 4; 127 cache->saved_regs[SPARC32_NPC_REGNUM].addr = mcontext_addr + 2 * 4; 128 cache->saved_regs[SPARC32_Y_REGNUM].addr = mcontext_addr + 3 * 4; 129 130 /* Since %g0 is always zero, keep the identity encoding. */ 131 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 4; 132 regnum <= SPARC_O7_REGNUM; regnum++, addr += 4) 133 cache->saved_regs[regnum].addr = addr; 134 135 if (get_frame_memory_unsigned (this_frame, mcontext_addr + 19 * 4, 4)) 136 { 137 /* The register windows haven't been flushed. */ 138 for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) 139 trad_frame_set_unknown (cache->saved_regs, regnum); 140 } 141 else 142 { 143 addr = cache->saved_regs[SPARC_SP_REGNUM].addr; 144 addr = get_frame_memory_unsigned (this_frame, addr, 4); 145 for (regnum = SPARC_L0_REGNUM; 146 regnum <= SPARC_I7_REGNUM; regnum++, addr += 4) 147 cache->saved_regs[regnum].addr = addr; 148 } 149 150 return cache; 151 } 152 153 static void 154 sparc32_sol2_sigtramp_frame_this_id (struct frame_info *this_frame, 155 void **this_cache, 156 struct frame_id *this_id) 157 { 158 struct sparc_frame_cache *cache = 159 sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache); 160 161 (*this_id) = frame_id_build (cache->base, cache->pc); 162 } 163 164 static struct value * 165 sparc32_sol2_sigtramp_frame_prev_register (struct frame_info *this_frame, 166 void **this_cache, 167 int regnum) 168 { 169 struct sparc_frame_cache *cache = 170 sparc32_sol2_sigtramp_frame_cache (this_frame, this_cache); 171 172 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); 173 } 174 175 static int 176 sparc32_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self, 177 struct frame_info *this_frame, 178 void **this_cache) 179 { 180 return sol2_sigtramp_p (this_frame); 181 } 182 183 static const struct frame_unwind sparc32_sol2_sigtramp_frame_unwind = 184 { 185 SIGTRAMP_FRAME, 186 default_frame_unwind_stop_reason, 187 sparc32_sol2_sigtramp_frame_this_id, 188 sparc32_sol2_sigtramp_frame_prev_register, 189 NULL, 190 sparc32_sol2_sigtramp_frame_sniffer 191 }; 192 193 194 195 static void 196 sparc32_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 197 { 198 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 199 200 tdep->gregset = &sparc32_sol2_gregset; 201 tdep->sizeof_gregset = 152; 202 203 tdep->fpregset = &sparc32_sol2_fpregset; 204 tdep->sizeof_fpregset = 400; 205 206 sol2_init_abi (info, gdbarch); 207 208 /* Solaris has SVR4-style shared libraries... */ 209 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); 210 set_solib_svr4_fetch_link_map_offsets 211 (gdbarch, svr4_ilp32_fetch_link_map_offsets); 212 213 /* ...which means that we need some special handling when doing 214 prologue analysis. */ 215 tdep->plt_entry_size = 12; 216 217 /* Solaris has kernel-assisted single-stepping support. */ 218 set_gdbarch_software_single_step (gdbarch, NULL); 219 220 frame_unwind_append_unwinder (gdbarch, &sparc32_sol2_sigtramp_frame_unwind); 221 } 222 223 void _initialize_sparc_sol2_tdep (); 224 void 225 _initialize_sparc_sol2_tdep () 226 { 227 gdbarch_register_osabi (bfd_arch_sparc, 0, 228 GDB_OSABI_SOLARIS, sparc32_sol2_init_abi); 229 } 230