1/* Target-dependent code for Solaris UltraSPARC. 2 3 Copyright 2003, 2004 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., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, 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 "sparc64-tdep.h" 34 35/* From <sys/regset.h>. */ 36const struct sparc_gregset sparc64_sol2_gregset = 37{ 38 32 * 8, /* "tstate" */ 39 33 * 8, /* %pc */ 40 34 * 8, /* %npc */ 41 35 * 8, /* %y */ 42 -1, /* %wim */ 43 -1, /* %tbr */ 44 1 * 8, /* %g1 */ 45 16 * 8, /* %l0 */ 46 8 /* sizeof (%y) */ 47}; 48 49 50static struct sparc_frame_cache * 51sparc64_sol2_sigtramp_frame_cache (struct frame_info *next_frame, 52 void **this_cache) 53{ 54 struct sparc_frame_cache *cache; 55 CORE_ADDR mcontext_addr, addr; 56 int regnum; 57 58 if (*this_cache) 59 return *this_cache; 60 61 cache = sparc_frame_cache (next_frame, this_cache); 62 gdb_assert (cache == *this_cache); 63 64 cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); 65 66 /* The third argument is a pointer to an instance of `ucontext_t', 67 which has a member `uc_mcontext' that contains the saved 68 registers. */ 69 regnum = (cache->frameless_p ? SPARC_O2_REGNUM : SPARC_I2_REGNUM); 70 mcontext_addr = frame_unwind_register_unsigned (next_frame, regnum) + 64; 71 72 cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8; 73 cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8; 74 cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8; 75 cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8; 76 cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8; 77 cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8; 78 79 /* Since %g0 is always zero, keep the identity encoding. */ 80 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8; 81 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) 82 cache->saved_regs[regnum].addr = addr; 83 84 if (get_frame_memory_unsigned (next_frame, mcontext_addr + 21 * 8, 8)) 85 { 86 /* The register windows haven't been flushed. */ 87 for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++) 88 trad_frame_set_unknown (cache->saved_regs, regnum); 89 } 90 else 91 { 92 CORE_ADDR sp; 93 94 addr = cache->saved_regs[SPARC_SP_REGNUM].addr; 95 sp = get_frame_memory_unsigned (next_frame, addr, 8); 96 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; 97 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) 98 cache->saved_regs[regnum].addr = addr; 99 } 100 101 return cache; 102} 103 104static void 105sparc64_sol2_sigtramp_frame_this_id (struct frame_info *next_frame, 106 void **this_cache, 107 struct frame_id *this_id) 108{ 109 struct sparc_frame_cache *cache = 110 sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache); 111 112 (*this_id) = frame_id_build (cache->base, cache->pc); 113} 114 115static void 116sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *next_frame, 117 void **this_cache, 118 int regnum, int *optimizedp, 119 enum lval_type *lvalp, 120 CORE_ADDR *addrp, 121 int *realnump, void *valuep) 122{ 123 struct sparc_frame_cache *cache = 124 sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache); 125 126 trad_frame_prev_register (next_frame, cache->saved_regs, regnum, 127 optimizedp, lvalp, addrp, realnump, valuep); 128} 129 130static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind = 131{ 132 SIGTRAMP_FRAME, 133 sparc64_sol2_sigtramp_frame_this_id, 134 sparc64_sol2_sigtramp_frame_prev_register 135}; 136 137static const struct frame_unwind * 138sparc64_sol2_sigtramp_frame_sniffer (struct frame_info *next_frame) 139{ 140 CORE_ADDR pc = frame_pc_unwind (next_frame); 141 char *name; 142 143 find_pc_partial_function (pc, &name, NULL, NULL); 144 if (sparc_sol2_pc_in_sigtramp (pc, name)) 145 return &sparc64_sol2_sigtramp_frame_unwind; 146 147 return NULL; 148} 149 150 151void 152sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 153{ 154 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); 155 156 set_gdbarch_pc_in_sigtramp (gdbarch, sparc_sol2_pc_in_sigtramp); 157 frame_unwind_append_sniffer (gdbarch, sparc64_sol2_sigtramp_frame_sniffer); 158 159 sparc64_init_abi (info, gdbarch); 160 161 /* Solaris has SVR4-style shared libraries... */ 162 set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section); 163 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); 164 165 /* ...which means that we need some special handling when doing 166 prologue analysis. */ 167 tdep->plt_entry_size = 16; 168 169 /* Solaris has kernel-assisted single-stepping support. */ 170 set_gdbarch_software_single_step (gdbarch, NULL); 171} 172 173 174/* Provide a prototype to silence -Wmissing-prototypes. */ 175void _initialize_sparc64_sol2_tdep (void); 176 177void 178_initialize_sparc64_sol2_tdep (void) 179{ 180 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, 181 GDB_OSABI_SOLARIS, sparc64_sol2_init_abi); 182} 183