| 1 | /* Target-dependent code for Solaris UltraSPARC. |
| 2 | |
| 3 | Copyright (C) 2003, 2004, 2006 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 2 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, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "frame.h" |
| 24 | #include "frame-unwind.h" |
| 25 | #include "gdbarch.h" |
| 26 | #include "symtab.h" |
| 27 | #include "objfiles.h" |
| 28 | #include "osabi.h" |
| 29 | #include "trad-frame.h" |
| 30 | |
| 31 | #include "gdb_assert.h" |
| 32 | |
| 33 | #include "sol2-tdep.h" |
| 34 | #include "sparc64-tdep.h" |
| 35 | #include "solib-svr4.h" |
| 36 | |
| 37 | /* From <sys/regset.h>. */ |
| 38 | const struct sparc_gregset sparc64_sol2_gregset = |
| 39 | { |
| 40 | 32 * 8, /* "tstate" */ |
| 41 | 33 * 8, /* %pc */ |
| 42 | 34 * 8, /* %npc */ |
| 43 | 35 * 8, /* %y */ |
| 44 | -1, /* %wim */ |
| 45 | -1, /* %tbr */ |
| 46 | 1 * 8, /* %g1 */ |
| 47 | 16 * 8, /* %l0 */ |
| 48 | 8 /* sizeof (%y) */ |
| 49 | }; |
| 50 | \f |
| 51 | |
| 52 | static struct sparc_frame_cache * |
| 53 | sparc64_sol2_sigtramp_frame_cache (struct frame_info *next_frame, |
| 54 | void **this_cache) |
| 55 | { |
| 56 | struct sparc_frame_cache *cache; |
| 57 | CORE_ADDR mcontext_addr, addr; |
| 58 | int regnum; |
| 59 | |
| 60 | if (*this_cache) |
| 61 | return *this_cache; |
| 62 | |
| 63 | cache = sparc_frame_cache (next_frame, this_cache); |
| 64 | gdb_assert (cache == *this_cache); |
| 65 | |
| 66 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); |
| 67 | |
| 68 | /* The third argument is a pointer to an instance of `ucontext_t', |
| 69 | which has a member `uc_mcontext' that contains the saved |
| 70 | registers. */ |
| 71 | regnum = (cache->frameless_p ? SPARC_O2_REGNUM : SPARC_I2_REGNUM); |
| 72 | mcontext_addr = frame_unwind_register_unsigned (next_frame, regnum) + 64; |
| 73 | |
| 74 | cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8; |
| 75 | cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8; |
| 76 | cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8; |
| 77 | cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8; |
| 78 | cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8; |
| 79 | cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8; |
| 80 | |
| 81 | /* Since %g0 is always zero, keep the identity encoding. */ |
| 82 | for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8; |
| 83 | regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) |
| 84 | cache->saved_regs[regnum].addr = addr; |
| 85 | |
| 86 | if (get_frame_memory_unsigned (next_frame, mcontext_addr + 21 * 8, 8)) |
| 87 | { |
| 88 | /* The register windows haven't been flushed. */ |
| 89 | for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) |
| 90 | trad_frame_set_unknown (cache->saved_regs, regnum); |
| 91 | } |
| 92 | else |
| 93 | { |
| 94 | CORE_ADDR sp; |
| 95 | |
| 96 | addr = cache->saved_regs[SPARC_SP_REGNUM].addr; |
| 97 | sp = get_frame_memory_unsigned (next_frame, addr, 8); |
| 98 | for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; |
| 99 | regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) |
| 100 | cache->saved_regs[regnum].addr = addr; |
| 101 | } |
| 102 | |
| 103 | return cache; |
| 104 | } |
| 105 | |
| 106 | static void |
| 107 | sparc64_sol2_sigtramp_frame_this_id (struct frame_info *next_frame, |
| 108 | void **this_cache, |
| 109 | struct frame_id *this_id) |
| 110 | { |
| 111 | struct sparc_frame_cache *cache = |
| 112 | sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache); |
| 113 | |
| 114 | (*this_id) = frame_id_build (cache->base, cache->pc); |
| 115 | } |
| 116 | |
| 117 | static void |
| 118 | sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *next_frame, |
| 119 | void **this_cache, |
| 120 | int regnum, int *optimizedp, |
| 121 | enum lval_type *lvalp, |
| 122 | CORE_ADDR *addrp, |
| 123 | int *realnump, gdb_byte *valuep) |
| 124 | { |
| 125 | struct sparc_frame_cache *cache = |
| 126 | sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache); |
| 127 | |
| 128 | trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum, |
| 129 | optimizedp, lvalp, addrp, realnump, valuep); |
| 130 | } |
| 131 | |
| 132 | static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind = |
| 133 | { |
| 134 | SIGTRAMP_FRAME, |
| 135 | sparc64_sol2_sigtramp_frame_this_id, |
| 136 | sparc64_sol2_sigtramp_frame_prev_register |
| 137 | }; |
| 138 | |
| 139 | static const struct frame_unwind * |
| 140 | sparc64_sol2_sigtramp_frame_sniffer (struct frame_info *next_frame) |
| 141 | { |
| 142 | CORE_ADDR pc = frame_pc_unwind (next_frame); |
| 143 | char *name; |
| 144 | |
| 145 | find_pc_partial_function (pc, &name, NULL, NULL); |
| 146 | if (sparc_sol2_pc_in_sigtramp (pc, name)) |
| 147 | return &sparc64_sol2_sigtramp_frame_unwind; |
| 148 | |
| 149 | return NULL; |
| 150 | } |
| 151 | \f |
| 152 | |
| 153 | void |
| 154 | sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 155 | { |
| 156 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 157 | |
| 158 | frame_unwind_append_sniffer (gdbarch, sparc64_sol2_sigtramp_frame_sniffer); |
| 159 | |
| 160 | sparc64_init_abi (info, gdbarch); |
| 161 | |
| 162 | /* Solaris has SVR4-style shared libraries... */ |
| 163 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); |
| 164 | set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver); |
| 165 | set_solib_svr4_fetch_link_map_offsets |
| 166 | (gdbarch, svr4_lp64_fetch_link_map_offsets); |
| 167 | |
| 168 | /* ...which means that we need some special handling when doing |
| 169 | prologue analysis. */ |
| 170 | tdep->plt_entry_size = 16; |
| 171 | |
| 172 | /* Solaris has kernel-assisted single-stepping support. */ |
| 173 | set_gdbarch_software_single_step (gdbarch, NULL); |
| 174 | } |
| 175 | \f |
| 176 | |
| 177 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 178 | void _initialize_sparc64_sol2_tdep (void); |
| 179 | |
| 180 | void |
| 181 | _initialize_sparc64_sol2_tdep (void) |
| 182 | { |
| 183 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, |
| 184 | GDB_OSABI_SOLARIS, sparc64_sol2_init_abi); |
| 185 | } |