Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* i386 ABI-specified defaults for DWARF CFI. |
| 2 | Copyright (C) 2009 Red Hat, Inc. |
| 3 | This file is part of Red Hat elfutils. |
| 4 | |
| 5 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by the |
| 7 | Free Software Foundation; version 2 of the License. |
| 8 | |
| 9 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 10 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License along |
| 15 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 16 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 17 | |
| 18 | Red Hat elfutils is an included package of the Open Invention Network. |
| 19 | An included package of the Open Invention Network is a package for which |
| 20 | Open Invention Network licensees cross-license their patents. No patent |
| 21 | license is granted, either expressly or impliedly, by designation as an |
| 22 | included package. Should you wish to participate in the Open Invention |
| 23 | Network licensing program, please visit www.openinventionnetwork.com |
| 24 | <http://www.openinventionnetwork.com>. */ |
| 25 | |
| 26 | #ifdef HAVE_CONFIG_H |
| 27 | # include <config.h> |
| 28 | #endif |
| 29 | |
| 30 | #include <dwarf.h> |
| 31 | |
| 32 | #define BACKEND i386_ |
| 33 | #include "libebl_CPU.h" |
| 34 | |
| 35 | int |
| 36 | i386_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info) |
| 37 | { |
| 38 | static const uint8_t abi_cfi[] = |
| 39 | { |
| 40 | /* Call-saved regs. */ |
| 41 | DW_CFA_same_value, ULEB128_7 (3), /* %ebx */ |
| 42 | DW_CFA_same_value, ULEB128_7 (5), /* %ebp */ |
| 43 | DW_CFA_same_value, ULEB128_7 (6), /* %esi */ |
| 44 | DW_CFA_same_value, ULEB128_7 (7), /* %edi */ |
| 45 | |
| 46 | /* The CFA is the SP. */ |
| 47 | DW_CFA_val_offset, ULEB128_7 (4), ULEB128_7 (0), |
| 48 | |
| 49 | /* Segment registers are call-saved if ever used at all. */ |
| 50 | DW_CFA_same_value, ULEB128_7 (40), /* %es */ |
| 51 | DW_CFA_same_value, ULEB128_7 (41), /* %cs */ |
| 52 | DW_CFA_same_value, ULEB128_7 (42), /* %ss */ |
| 53 | DW_CFA_same_value, ULEB128_7 (43), /* %ds */ |
| 54 | DW_CFA_same_value, ULEB128_7 (44), /* %fs */ |
| 55 | DW_CFA_same_value, ULEB128_7 (45), /* %gs */ |
| 56 | }; |
| 57 | |
| 58 | abi_info->initial_instructions = abi_cfi; |
| 59 | abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi]; |
| 60 | abi_info->data_alignment_factor = 4; |
| 61 | |
| 62 | abi_info->return_address_register = 8; /* %eip */ |
| 63 | |
| 64 | return 0; |
| 65 | } |