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/* Target-dependent code for Solaris UltraSPARC.

   Copyright (C) 2003, 2004, 2006, 2007, 2008 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"

#include "frame.h"

#include "frame-unwind.h"

#include "gdbarch.h"

#include "symtab.h"

#include "objfiles.h"

#include "osabi.h"

#include "trad-frame.h"

#include "gdb_assert.h"

#include "sol2-tdep.h"

#include "sparc64-tdep.h"

#include "solib-svr4.h"

/* From <sys/regset.h>.  */

const struct sparc_gregset sparc64_sol2_gregset =

{

  32 * 8,                       /* "tstate" */

  33 * 8,                       /* %pc */

  34 * 8,                       /* %npc */

  35 * 8,                       /* %y */

  -1,                           /* %wim */

  -1,                           /* %tbr */

  1 * 8,                        /* %g1 */

  16 * 8,                       /* %l0 */

  8                             /* sizeof (%y) */

};

static struct sparc_frame_cache *

sparc64_sol2_sigtramp_frame_cache (struct frame_info *next_frame,

                                   void **this_cache)

{

  struct sparc_frame_cache *cache;

  CORE_ADDR mcontext_addr, addr;

  int regnum;

  if (*this_cache)

    return *this_cache;

  cache = sparc_frame_cache (next_frame, this_cache);

  gdb_assert (cache == *this_cache);

  cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);

  /* The third argument is a pointer to an instance of `ucontext_t',

     which has a member `uc_mcontext' that contains the saved

     registers.  */

  regnum = (cache->frameless_p ? SPARC_O2_REGNUM : SPARC_I2_REGNUM);

  mcontext_addr = frame_unwind_register_unsigned (next_frame, regnum) + 64;

  cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8;

  cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8;

  cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8;

  cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8;

  cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8;

  cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8;

  /* Since %g0 is always zero, keep the identity encoding.  */

  for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8;

       regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)

    cache->saved_regs[regnum].addr = addr;

  if (get_frame_memory_unsigned (next_frame, mcontext_addr + 21 * 8, 8))

    {

      /* The register windows haven't been flushed.  */

      for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)

        trad_frame_set_unknown (cache->saved_regs, regnum);

    }

  else

    {

      CORE_ADDR sp;

      addr = cache->saved_regs[SPARC_SP_REGNUM].addr;

      sp = get_frame_memory_unsigned (next_frame, addr, 8);

      for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;

           regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)

        cache->saved_regs[regnum].addr = addr;

    }

  return cache;

}

static void

sparc64_sol2_sigtramp_frame_this_id (struct frame_info *next_frame,

                                     void **this_cache,

                                     struct frame_id *this_id)

{

  struct sparc_frame_cache *cache =

    sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache);

  (*this_id) = frame_id_build (cache->base, cache->pc);

}

static void

sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *next_frame,

                                           void **this_cache,

                                           int regnum, int *optimizedp,

                                           enum lval_type *lvalp,

                                           CORE_ADDR *addrp,

                                           int *realnump, gdb_byte *valuep)

{

  struct sparc_frame_cache *cache =

    sparc64_sol2_sigtramp_frame_cache (next_frame, this_cache);

  trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,

                                optimizedp, lvalp, addrp, realnump, valuep);

}

static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind =

{

  SIGTRAMP_FRAME,

  sparc64_sol2_sigtramp_frame_this_id,

  sparc64_sol2_sigtramp_frame_prev_register

};

static const struct frame_unwind *

sparc64_sol2_sigtramp_frame_sniffer (struct frame_info *next_frame)

{

  CORE_ADDR pc = frame_pc_unwind (next_frame);

  char *name;

  find_pc_partial_function (pc, &name, NULL, NULL);

  if (sparc_sol2_pc_in_sigtramp (pc, name))

    return &sparc64_sol2_sigtramp_frame_unwind;

  return NULL;

}

void

sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)

{

  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  frame_unwind_append_sniffer (gdbarch, sparc64_sol2_sigtramp_frame_sniffer);

  sparc64_init_abi (info, gdbarch);

  /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO)

     compiler puts out 0 instead of the address in N_SO stabs.  Starting with

     SunPRO 3.0, the compiler does this for N_FUN stabs too.  */

  set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);

  /* The Sun compilers also do "globalization"; see the comment in

     sparc_sol2_static_transform_name for more information.  */

  set_gdbarch_static_transform_name

    (gdbarch, sparc_sol2_static_transform_name);

  /* Solaris has SVR4-style shared libraries...  */

  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);

  set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);

  set_solib_svr4_fetch_link_map_offsets

    (gdbarch, svr4_lp64_fetch_link_map_offsets);

  /* ...which means that we need some special handling when doing

     prologue analysis.  */

  tdep->plt_entry_size = 16;

  /* Solaris has kernel-assisted single-stepping support.  */

  set_gdbarch_software_single_step (gdbarch, NULL);

}

/* Provide a prototype to silence -Wmissing-prototypes.  */

void _initialize_sparc64_sol2_tdep (void);

void

_initialize_sparc64_sol2_tdep (void)

{

  gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,

                          GDB_OSABI_SOLARIS, sparc64_sol2_init_abi);

}