gdb/sparc64-sol2-tdep.c

   1 /* Target-dependent code for Solaris UltraSPARC.
   2
   3    Copyright (C) 2003-2014 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
  29 #include "sol2-tdep.h"
  30 #include "sparc64-tdep.h"
  31 #include "solib-svr4.h"
  32
  33 /* From <sys/regset.h>.  */
  34 const struct sparc_gregmap sparc64_sol2_gregmap =
  35 {
  36   32 * 8,                       /* "tstate" */
  37   33 * 8,                       /* %pc */
  38   34 * 8,                       /* %npc */
  39   35 * 8,                       /* %y */
  40   -1,                           /* %wim */
  41   -1,                           /* %tbr */
  42   1 * 8,                        /* %g1 */
  43   16 * 8,                       /* %l0 */
  44   8                             /* sizeof (%y) */
  45 };
  46
  47 const struct sparc_fpregmap sparc64_sol2_fpregmap =
  48 {
  49   0 * 8,                        /* %f0 */
  50   33 * 8,                       /* %fsr */
  51 };
  52 \f
  53
  54 static struct sparc_frame_cache *
  55 sparc64_sol2_sigtramp_frame_cache (struct frame_info *this_frame,
  56                                    void **this_cache)
  57 {
  58   struct sparc_frame_cache *cache;
  59   CORE_ADDR mcontext_addr, addr;
  60   int regnum;
  61
  62   if (*this_cache)
  63     return *this_cache;
  64
  65   cache = sparc_frame_cache (this_frame, this_cache);
  66   gdb_assert (cache == *this_cache);
  67
  68   cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
  69
  70   /* The third argument is a pointer to an instance of `ucontext_t',
  71      which has a member `uc_mcontext' that contains the saved
  72      registers.  */
  73   regnum =
  74     (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
  75   mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 64;
  76
  77   cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8;
  78   cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8;
  79   cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8;
  80   cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8;
  81   cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8;
  82   cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8;
  83
  84   /* Since %g0 is always zero, keep the identity encoding.  */
  85   for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8;
  86        regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
  87     cache->saved_regs[regnum].addr = addr;
  88
  89   if (get_frame_memory_unsigned (this_frame, mcontext_addr + 21 * 8, 8))
  90     {
  91       /* The register windows haven't been flushed.  */
  92       for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
  93         trad_frame_set_unknown (cache->saved_regs, regnum);
  94     }
  95   else
  96     {
  97       CORE_ADDR sp;
  98
  99       addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
 100       sp = get_frame_memory_unsigned (this_frame, addr, 8);
 101       for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
 102            regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
 103         cache->saved_regs[regnum].addr = addr;
 104     }
 105
 106   return cache;
 107 }
 108
 109 static void
 110 sparc64_sol2_sigtramp_frame_this_id (struct frame_info *this_frame,
 111                                      void **this_cache,
 112                                      struct frame_id *this_id)
 113 {
 114   struct sparc_frame_cache *cache =
 115     sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache);
 116
 117   (*this_id) = frame_id_build (cache->base, cache->pc);
 118 }
 119
 120 static struct value *
 121 sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *this_frame,
 122                                            void **this_cache,
 123                                            int regnum)
 124 {
 125   struct sparc_frame_cache *cache =
 126     sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache);
 127
 128   return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
 129 }
 130
 131 static int
 132 sparc64_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
 133                                      struct frame_info *this_frame,
 134                                      void **this_cache)
 135 {
 136   CORE_ADDR pc = get_frame_pc (this_frame);
 137   const char *name;
 138
 139   find_pc_partial_function (pc, &name, NULL, NULL);
 140   if (sparc_sol2_pc_in_sigtramp (pc, name))
 141     return 1;
 142
 143   return 0;
 144 }
 145 static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind =
 146 {
 147   SIGTRAMP_FRAME,
 148   default_frame_unwind_stop_reason,
 149   sparc64_sol2_sigtramp_frame_this_id,
 150   sparc64_sol2_sigtramp_frame_prev_register,
 151   NULL,
 152   sparc64_sol2_sigtramp_frame_sniffer
 153 };
 154
 155 \f
 156
 157 void
 158 sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 159 {
 160   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 161
 162   frame_unwind_append_unwinder (gdbarch, &sparc64_sol2_sigtramp_frame_unwind);
 163
 164   sparc64_init_abi (info, gdbarch);
 165
 166   /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO)
 167      compiler puts out 0 instead of the address in N_SO stabs.  Starting with
 168      SunPRO 3.0, the compiler does this for N_FUN stabs too.  */
 169   set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);
 170
 171   /* The Sun compilers also do "globalization"; see the comment in
 172      sparc_sol2_static_transform_name for more information.  */
 173   set_gdbarch_static_transform_name
 174     (gdbarch, sparc_sol2_static_transform_name);
 175
 176   /* Solaris has SVR4-style shared libraries...  */
 177   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
 178   set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
 179   set_solib_svr4_fetch_link_map_offsets
 180     (gdbarch, svr4_lp64_fetch_link_map_offsets);
 181
 182   /* ...which means that we need some special handling when doing
 183      prologue analysis.  */
 184   tdep->plt_entry_size = 16;
 185
 186   /* Solaris has kernel-assisted single-stepping support.  */
 187   set_gdbarch_software_single_step (gdbarch, NULL);
 188
 189   /* How to print LWP PTIDs from core files.  */
 190   set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
 191 }
 192 \f
 193
 194 /* Provide a prototype to silence -Wmissing-prototypes.  */
 195 void _initialize_sparc64_sol2_tdep (void);
 196
 197 void
 198 _initialize_sparc64_sol2_tdep (void)
 199 {
 200   gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
 201                           GDB_OSABI_SOLARIS, sparc64_sol2_init_abi);
 202 }