| Brian Silverman | 8649792 | 2018-02-10 19:28:39 -0500 | [diff] [blame] | 1 | /* Common interface for libebl modules. |
| 2 | Copyright (C) 2000, 2001, 2002, 2003, 2005, 2013, 2014 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 | #ifndef _LIBEBL_CPU_H |
| 30 | #define _LIBEBL_CPU_H 1 |
| 31 | |
| 32 | #include <dwarf.h> |
| 33 | #include <libeblP.h> |
| 34 | |
| 35 | #define EBLHOOK(name) EBLHOOK_1(BACKEND, name) |
| 36 | #define EBLHOOK_1(a, b) EBLHOOK_2(a, b) |
| 37 | #define EBLHOOK_2(a, b) a##b |
| 38 | |
| 39 | /* Constructor. */ |
| 40 | extern const char *EBLHOOK(init) (Elf *elf, GElf_Half machine, |
| 41 | Ebl *eh, size_t ehlen); |
| 42 | |
| 43 | #include "ebl-hooks.h" |
| 44 | |
| 45 | #define HOOK(eh, name) eh->name = EBLHOOK(name) |
| 46 | |
| 47 | extern bool (*generic_debugscn_p) (const char *) attribute_hidden; |
| 48 | |
| 49 | /* Helper for retval. Return dwarf_tag (die), but calls return -1 |
| 50 | if there where previous errors that leave die NULL. */ |
| 51 | #define DWARF_TAG_OR_RETURN(die) \ |
| 52 | ({ Dwarf_Die *_die = (die); \ |
| 53 | if (_die == NULL) return -1; \ |
| 54 | dwarf_tag (_die); }) |
| 55 | |
| 56 | /* Get a type die corresponding to DIE. Peel CV qualifiers off |
| 57 | it. */ |
| 58 | static inline int |
| 59 | dwarf_peeled_die_type (Dwarf_Die *die, Dwarf_Die *result) |
| 60 | { |
| 61 | Dwarf_Attribute attr_mem; |
| 62 | Dwarf_Attribute *attr = dwarf_attr_integrate (die, DW_AT_type, &attr_mem); |
| 63 | if (attr == NULL) |
| 64 | /* The function has no return value, like a `void' function in C. */ |
| 65 | return 0; |
| 66 | |
| 67 | if (dwarf_formref_die (attr, result) == NULL) |
| 68 | return -1; |
| 69 | |
| 70 | if (dwarf_peel_type (result, result) != 0) |
| 71 | return -1; |
| 72 | |
| 73 | return DWARF_TAG_OR_RETURN (result); |
| 74 | } |
| 75 | |
| 76 | #endif /* libebl_CPU.h */ |