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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [i386-cygwin-tdep.c] - Blame information for rev 318

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Line No. Rev Author Line
1 227 jeremybenn
/* Target-dependent code for Cygwin running on i386's, for GDB.
2
 
3
   Copyright (C) 2003, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4
 
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   This file is part of GDB.
6
 
7
   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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12
   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 "i386-tdep.h"
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#include "windows-tdep.h"
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#include "regset.h"
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#include "gdb_obstack.h"
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#include "xml-support.h"
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#include "gdbcore.h"
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#include "solib.h"
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#include "solib-target.h"
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/* Core file support.  */
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/* This vector maps GDB's idea of a register's number into an address
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   in the windows exception context vector.  */
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static int i386_windows_gregset_reg_offset[] =
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{
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  176, /* eax */
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  172, /* ecx */
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  168, /* edx */
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  164, /* ebx */
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  196, /* esp */
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  180, /* ebp */
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  160, /* esi */
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  156, /* edi */
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  184, /* eip */
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  192, /* eflags */
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  188, /* cs */
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  200, /* ss */
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  152, /* ds */
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  148, /* es */
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  144, /* fs */
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  140, /* gs */
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  56, /* FloatSave.RegisterArea[0 * 10] */
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  66, /* FloatSave.RegisterArea[1 * 10] */
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  76, /* FloatSave.RegisterArea[2 * 10] */
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  86, /* FloatSave.RegisterArea[3 * 10] */
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  96, /* FloatSave.RegisterArea[4 * 10] */
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  106, /* FloatSave.RegisterArea[5 * 10] */
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  116, /* FloatSave.RegisterArea[6 * 10] */
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  126, /* FloatSave.RegisterArea[7 * 10] */
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  28, /* FloatSave.ControlWord */
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  32, /* FloatSave.StatusWord */
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  36, /* FloatSave.TagWord */
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  44, /* FloatSave.ErrorSelector */
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  40, /* FloatSave.ErrorOffset */
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  52, /* FloatSave.DataSelector */
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  48, /* FloatSave.DataOffset */
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  44, /* FloatSave.ErrorSelector */
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  /* XMM0-7 */
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  364, /* ExtendedRegisters[10*16] */
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  380, /* ExtendedRegisters[11*16] */
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  396, /* ExtendedRegisters[12*16] */
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  412, /* ExtendedRegisters[13*16] */
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  428, /* ExtendedRegisters[14*16] */
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  444, /* ExtendedRegisters[15*16] */
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  460, /* ExtendedRegisters[16*16] */
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  476, /* ExtendedRegisters[17*16] */
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  /* MXCSR */
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  228 /* ExtendedRegisters[24] */
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};
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#define I386_WINDOWS_SIZEOF_GREGSET 716
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/* Return the appropriate register set for the core section identified
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   by SECT_NAME and SECT_SIZE.  */
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static const struct regset *
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i386_windows_regset_from_core_section (struct gdbarch *gdbarch,
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                                     const char *sect_name, size_t sect_size)
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{
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  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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  if (strcmp (sect_name, ".reg") == 0
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      && sect_size == I386_WINDOWS_SIZEOF_GREGSET)
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    {
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      if (tdep->gregset == NULL)
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        tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset,
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                                      i386_collect_gregset);
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      return tdep->gregset;
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    }
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  return NULL;
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}
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struct cpms_data
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{
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  struct gdbarch *gdbarch;
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  struct obstack *obstack;
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  int module_count;
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};
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static void
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core_process_module_section (bfd *abfd, asection *sect, void *obj)
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{
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  struct cpms_data *data = obj;
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  enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
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  char *module_name;
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  size_t module_name_size;
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  CORE_ADDR base_addr;
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  char *buf = NULL;
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  if (strncmp (sect->name, ".module", 7) != 0)
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    return;
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  buf = xmalloc (bfd_get_section_size (sect) + 1);
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  if (!buf)
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    {
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      printf_unfiltered ("memory allocation failed for %s\n", sect->name);
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      goto out;
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    }
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  if (!bfd_get_section_contents (abfd, sect,
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                                 buf, 0, bfd_get_section_size (sect)))
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    goto out;
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146
 
147
 
148
  /* A DWORD (data_type) followed by struct windows_core_module_info.  */
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150
  base_addr =
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    extract_unsigned_integer (buf + 4, 4, byte_order);
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153
  module_name_size =
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    extract_unsigned_integer (buf + 8, 4, byte_order);
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156
  module_name = buf + 12;
157
  if (module_name - buf + module_name_size > bfd_get_section_size (sect))
158
    goto out;
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160
  /* The first module is the .exe itself.  */
161
  if (data->module_count != 0)
162
    windows_xfer_shared_library (module_name, base_addr,
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                                 data->gdbarch, data->obstack);
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  data->module_count++;
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166
out:
167
  if (buf)
168
    xfree (buf);
169
  return;
170
}
171
 
172
static LONGEST
173
windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
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                                  gdb_byte *readbuf,
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                                  ULONGEST offset, LONGEST len)
176
{
177
  struct obstack obstack;
178
  const char *buf;
179
  LONGEST len_avail;
180
  struct cpms_data data = { gdbarch, &obstack, 0 };
181
 
182
  obstack_init (&obstack);
183
  obstack_grow_str (&obstack, "<library-list>\n");
184
  bfd_map_over_sections (core_bfd,
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                         core_process_module_section,
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                         &data);
187
  obstack_grow_str0 (&obstack, "</library-list>\n");
188
 
189
  buf = obstack_finish (&obstack);
190
  len_avail = strlen (buf);
191
  if (offset >= len_avail)
192
    return 0;
193
 
194
  if (len > len_avail - offset)
195
    len = len_avail - offset;
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  memcpy (readbuf, buf + offset, len);
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198
  obstack_free (&obstack, NULL);
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  return len;
200
}
201
 
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static CORE_ADDR
203
i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
204
{
205
  return i386_pe_skip_trampoline_code (frame, pc, NULL);
206
}
207
 
208
static void
209
i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
210
{
211
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
212
 
213
  set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
214
 
215
  set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
216
 
217
  tdep->struct_return = reg_struct_return;
218
 
219
  tdep->gregset_reg_offset = i386_windows_gregset_reg_offset;
220
  tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset);
221
  tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET;
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223
  set_solib_ops (gdbarch, &solib_target_so_ops);
224
 
225
  /* Core file support.  */
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  set_gdbarch_regset_from_core_section
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    (gdbarch, i386_windows_regset_from_core_section);
228
  set_gdbarch_core_xfer_shared_libraries
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    (gdbarch, windows_core_xfer_shared_libraries);
230
}
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static enum gdb_osabi
233
i386_cygwin_osabi_sniffer (bfd *abfd)
234
{
235
  char *target_name = bfd_get_target (abfd);
236
 
237
  /* Interix also uses pei-i386.
238
     We need a way to distinguish between the two. */
239
  if (strcmp (target_name, "pei-i386") == 0)
240
    return GDB_OSABI_CYGWIN;
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242
  /* Cygwin uses elf core dumps.  Do not claim all ELF executables,
243
     check whether there is a .reg section of proper size.  */
244
  if (strcmp (target_name, "elf32-i386") == 0)
245
    {
246
      asection *section = bfd_get_section_by_name (abfd, ".reg");
247
      if (section
248
          && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET)
249
        return GDB_OSABI_CYGWIN;
250
    }
251
 
252
  return GDB_OSABI_UNKNOWN;
253
}
254
 
255
/* Provide a prototype to silence -Wmissing-prototypes.  */
256
void _initialize_i386_cygwin_tdep (void);
257
 
258
void
259
_initialize_i386_cygwin_tdep (void)
260
{
261
  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
262
                                  i386_cygwin_osabi_sniffer);
263
 
264
  /* Cygwin uses elf core dumps.  */
265
  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
266
                                  i386_cygwin_osabi_sniffer);
267
 
268
  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
269
                          i386_cygwin_init_abi);
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}

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