Line data    Source code

       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             : 
      38             : int
      39          31 : i386_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
      40             : {
      41          31 :   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          31 :   abi_info->initial_instructions = abi_cfi;
      62          31 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      63          31 :   abi_info->data_alignment_factor = 4;
      64             : 
      65          31 :   abi_info->return_address_register = 8; /* %eip */
      66             : 
      67          31 :   return 0;
      68             : }