| 1 | /* Target-dependent code for Solaris UltraSPARC. |
| 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 "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 | \f |
| 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 (struct sparc_frame_cache *) *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 | \f |
| 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 | void |
| 247 | _initialize_sparc64_sol2_tdep (void) |
| 248 | { |
| 249 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, |
| 250 | GDB_OSABI_SOLARIS, sparc64_sol2_init_abi); |
| 251 | } |