OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [dicos-tdep.c] - Blame information for rev 280

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 227 jeremybenn
/* Target-dependent, architecture-independent code for DICOS, for GDB.
2
 
3
   Copyright (C) 2009, 2010 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 "osabi.h"
22
#include "gdb_string.h"
23
#include "solib.h"
24
#include "solib-target.h"
25
#include "inferior.h"
26
#include "dicos-tdep.h"
27
 
28
void
29
dicos_init_abi (struct gdbarch *gdbarch)
30
{
31
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
32
 
33
  set_solib_ops (gdbarch, &solib_target_so_ops);
34
 
35
  /* Every process, although has its own address space, sees the same
36
     list of shared libraries.  There's no "main executable" in DICOS,
37
     so this accounts for all code.  */
38
  set_gdbarch_has_global_solist (gdbarch, 1);
39
 
40
  /* The DICOS breakpoint API takes care of magically making
41
     breakpoints visible to all inferiors.  */
42
  set_gdbarch_has_global_breakpoints (gdbarch, 1);
43
 
44
  /* There's no (standard definition of) entry point or a guaranteed
45
     text location with a symbol where to place the call dummy, so we
46
     put it on the stack.  */
47
  set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
48
 
49
  /* DICOS rewinds the PC itself.  */
50
  set_gdbarch_decr_pc_after_break (gdbarch, 0);
51
}
52
 
53
/* Return true if ABFD is a dicos load module.  HEADER_SIZE is the
54
   expected size of the "header" section in bytes.  */
55
 
56
int
57
dicos_load_module_p (bfd *abfd, int header_size)
58
{
59
  long storage_needed;
60
  int ret = 0;
61
  asymbol **symbol_table = NULL;
62
  const char *symname = "Dicos_loadModuleInfo";
63
  asection *section;
64
 
65
  /* DICOS files don't have a .note.ABI-tag marker or something
66
     similar.  We do know there's always a "header" section of
67
     HEADER_SIZE bytes (size depends on architecture), and there's
68
     always a "Dicos_loadModuleInfo" symbol defined.  Look for the
69
     section first, as that should be cheaper.  */
70
 
71
  section = bfd_get_section_by_name (abfd, "header");
72
  if (!section)
73
    return 0;
74
 
75
  if (bfd_section_size (abfd, section) != header_size)
76
    return 0;
77
 
78
  /* Dicos LMs always have a "Dicos_loadModuleInfo" symbol
79
     defined.  Look for it.  */
80
 
81
  storage_needed = bfd_get_symtab_upper_bound (abfd);
82
  if (storage_needed < 0)
83
    {
84
      warning (_("Can't read elf symbols from %s: %s"), bfd_get_filename (abfd),
85
               bfd_errmsg (bfd_get_error ()));
86
      return 0;
87
    }
88
 
89
  if (storage_needed > 0)
90
    {
91
      long i, symcount;
92
 
93
      symbol_table = xmalloc (storage_needed);
94
      symcount = bfd_canonicalize_symtab (abfd, symbol_table);
95
 
96
      if (symcount < 0)
97
        warning (_("Can't read elf symbols from %s: %s"),
98
                 bfd_get_filename (abfd),
99
                 bfd_errmsg (bfd_get_error ()));
100
      else
101
        {
102
          for (i = 0; i < symcount; i++)
103
            {
104
              asymbol *sym = symbol_table[i];
105
              if (sym->name != NULL
106
                  && symname[0] == sym->name[0]
107
                  && strcmp (symname + 1, sym->name + 1) == 0)
108
                {
109
                  ret = 1;
110
                  break;
111
                }
112
            }
113
        }
114
    }
115
 
116
  xfree (symbol_table);
117
  return ret;
118
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.