1/* i386 ABI-specified defaults for DWARF CFI.
2   Copyright (C) 2009 Red Hat, Inc.
3   This file is part of elfutils.
4
5   This file is free software; you can redistribute it and/or modify
6   it under the terms of either
7
8     * the GNU Lesser General Public License as published by the Free
9       Software Foundation; either version 3 of the License, or (at
10       your option) any later version
11
12   or
13
14     * the GNU General Public License as published by the Free
15       Software Foundation; either version 2 of the License, or (at
16       your option) any later version
17
18   or both in parallel, as here.
19
20   elfutils is distributed in the hope that it will be useful, but
21   WITHOUT ANY WARRANTY; without even the implied warranty of
22   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
23   General Public License for more details.
24
25   You should have received copies of the GNU General Public License and
26   the GNU Lesser General Public License along with this program.  If
27   not, see <http://www.gnu.org/licenses/>.  */
28
29#ifdef HAVE_CONFIG_H
30# include <config.h>
31#endif
32
33#include <dwarf.h>
34
35#define BACKEND i386_
36#include "libebl_CPU.h"
37
38int
39i386_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
40{
41  static const uint8_t abi_cfi[] =
42    {
43      /* Call-saved regs.  */
44      DW_CFA_same_value, ULEB128_7 (3), /* %ebx */
45      DW_CFA_same_value, ULEB128_7 (5), /* %ebp */
46      DW_CFA_same_value, ULEB128_7 (6), /* %esi */
47      DW_CFA_same_value, ULEB128_7 (7), /* %edi */
48
49      /* The CFA is the SP.  */
50      DW_CFA_val_offset, ULEB128_7 (4), ULEB128_7 (0),
51
52      /* Segment registers are call-saved if ever used at all.  */
53      DW_CFA_same_value, ULEB128_7 (40), /* %es */
54      DW_CFA_same_value, ULEB128_7 (41), /* %cs */
55      DW_CFA_same_value, ULEB128_7 (42), /* %ss */
56      DW_CFA_same_value, ULEB128_7 (43), /* %ds */
57      DW_CFA_same_value, ULEB128_7 (44), /* %fs */
58      DW_CFA_same_value, ULEB128_7 (45), /* %gs */
59    };
60
61  abi_info->initial_instructions = abi_cfi;
62  abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
63  abi_info->data_alignment_factor = 4;
64
65  abi_info->return_address_register = 8; /* %eip */
66
67  return 0;
68}
69