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           30 : i386_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
      40              : {
      41           30 :   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           30 :   abi_info->initial_instructions = abi_cfi;
      62           30 :   abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
      63           30 :   abi_info->data_alignment_factor = 4;
      64              : 
      65           30 :   abi_info->return_address_register = 8; /* %eip */
      66              : 
      67           30 :   return 0;
      68              : }