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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [dicos-tdep.c] - Blame information for rev 227

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1 227 jeremybenn
/* Target-dependent, architecture-independent code for DICOS, for GDB.
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   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#include "defs.h"
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#include "osabi.h"
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#include "gdb_string.h"
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#include "solib.h"
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#include "solib-target.h"
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#include "inferior.h"
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#include "dicos-tdep.h"
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void
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dicos_init_abi (struct gdbarch *gdbarch)
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{
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  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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  set_solib_ops (gdbarch, &solib_target_so_ops);
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  /* Every process, although has its own address space, sees the same
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     list of shared libraries.  There's no "main executable" in DICOS,
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     so this accounts for all code.  */
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  set_gdbarch_has_global_solist (gdbarch, 1);
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  /* The DICOS breakpoint API takes care of magically making
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     breakpoints visible to all inferiors.  */
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  set_gdbarch_has_global_breakpoints (gdbarch, 1);
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  /* There's no (standard definition of) entry point or a guaranteed
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     text location with a symbol where to place the call dummy, so we
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     put it on the stack.  */
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  set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
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  /* DICOS rewinds the PC itself.  */
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  set_gdbarch_decr_pc_after_break (gdbarch, 0);
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}
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/* Return true if ABFD is a dicos load module.  HEADER_SIZE is the
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   expected size of the "header" section in bytes.  */
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int
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dicos_load_module_p (bfd *abfd, int header_size)
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{
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  long storage_needed;
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  int ret = 0;
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  asymbol **symbol_table = NULL;
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  const char *symname = "Dicos_loadModuleInfo";
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  asection *section;
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  /* DICOS files don't have a .note.ABI-tag marker or something
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     similar.  We do know there's always a "header" section of
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     HEADER_SIZE bytes (size depends on architecture), and there's
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     always a "Dicos_loadModuleInfo" symbol defined.  Look for the
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     section first, as that should be cheaper.  */
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  section = bfd_get_section_by_name (abfd, "header");
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  if (!section)
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    return 0;
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  if (bfd_section_size (abfd, section) != header_size)
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    return 0;
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  /* Dicos LMs always have a "Dicos_loadModuleInfo" symbol
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     defined.  Look for it.  */
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  storage_needed = bfd_get_symtab_upper_bound (abfd);
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  if (storage_needed < 0)
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    {
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      warning (_("Can't read elf symbols from %s: %s"), bfd_get_filename (abfd),
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               bfd_errmsg (bfd_get_error ()));
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      return 0;
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    }
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  if (storage_needed > 0)
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    {
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      long i, symcount;
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      symbol_table = xmalloc (storage_needed);
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      symcount = bfd_canonicalize_symtab (abfd, symbol_table);
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      if (symcount < 0)
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        warning (_("Can't read elf symbols from %s: %s"),
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                 bfd_get_filename (abfd),
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                 bfd_errmsg (bfd_get_error ()));
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      else
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        {
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          for (i = 0; i < symcount; i++)
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            {
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              asymbol *sym = symbol_table[i];
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              if (sym->name != NULL
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                  && symname[0] == sym->name[0]
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                  && strcmp (symname + 1, sym->name + 1) == 0)
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                {
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                  ret = 1;
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                  break;
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                }
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            }
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        }
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    }
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  xfree (symbol_table);
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  return ret;
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}

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