1 /* Common code for ebl reloc functions.
2 Copyright (C) 2005, 2006 Red Hat, Inc.
3 This file is part of elfutils.
5 This file is free software; you can redistribute it and/or modify
6 it under the terms of either
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
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
18 or both in parallel, as here.
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.
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/>. */
29 #include "libebl_CPU.h"
32 #define R_TYPE(name) PASTE (RELOC_PREFIX, name)
33 #define PASTE(a, b) PASTE_1 (a, b)
34 #define PASTE_1(a, b) a##b
35 #define R_NAME(name) R_NAME_1 (RELOC_PREFIX, name)
36 #define R_NAME_1(prefix, type) R_NAME_2 (prefix, type)
37 #define R_NAME_2(prefix, type) #prefix #type
39 #define RELOC_TYPES STRINGIFIED_PASTE (BACKEND, reloc.def)
40 #define STRINGIFIED_PASTE(a, b) STRINGIFY (PASTE (a, b))
41 #define STRINGIFY(x) STRINGIFY_1 (x)
42 #define STRINGIFY_1(x) #x
44 /* Provide a table of reloc type names, in a PIC-friendly fashion. */
46 static const struct EBLHOOK(reloc_nametable)
49 #define RELOC_TYPE(type, uses) \
50 char name_##type[sizeof R_NAME (type)];
53 } EBLHOOK(reloc_nametable) =
56 #define RELOC_TYPE(type, uses) R_NAME (type),
60 #define reloc_namestr (&EBLHOOK(reloc_nametable).zero)
62 static const uint_fast16_t EBLHOOK(reloc_nameidx)[] =
64 #define RELOC_TYPE(type, uses) \
65 [R_TYPE (type)] = offsetof (struct EBLHOOK(reloc_nametable), name_##type),
70 ((int) (sizeof EBLHOOK(reloc_nameidx) / sizeof EBLHOOK(reloc_nameidx)[0]))
72 #define REL (1 << (ET_REL - 1))
73 #define EXEC (1 << (ET_EXEC - 1))
74 #define DYN (1 << (ET_DYN - 1))
75 static const uint8_t EBLHOOK(reloc_valid)[] =
77 #define RELOC_TYPE(type, uses) [R_TYPE (type)] = uses,
86 EBLHOOK(reloc_type_name) (int reloc,
87 char *buf __attribute__ ((unused)),
88 size_t len __attribute__ ((unused)))
90 if (reloc >= 0 && reloc < nreloc && EBLHOOK(reloc_nameidx)[reloc] != 0)
91 return &reloc_namestr[EBLHOOK(reloc_nameidx)[reloc]];
96 EBLHOOK(reloc_type_check) (int reloc)
98 return reloc >= 0 && reloc < nreloc && EBLHOOK(reloc_nameidx)[reloc] != 0;
102 EBLHOOK(reloc_valid_use) (Elf *elf, int reloc)
104 uint8_t uses = EBLHOOK(reloc_valid)[reloc];
107 GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
108 assert (ehdr != NULL);
109 uint8_t type = ehdr->e_type;
111 return type > ET_NONE && type < ET_CORE && (uses & (1 << (type - 1)));
116 EBLHOOK(copy_reloc_p) (int reloc)
118 return reloc == R_TYPE (COPY);
122 EBLHOOK(none_reloc_p) (int reloc)
124 return reloc == R_TYPE (NONE);
127 #ifndef NO_RELATIVE_RELOC
129 EBLHOOK(relative_reloc_p) (int reloc)
131 return reloc == R_TYPE (RELATIVE);
136 EBLHOOK(init_reloc) (Ebl *ebl)
138 ebl->reloc_type_name = EBLHOOK(reloc_type_name);
139 ebl->reloc_type_check = EBLHOOK(reloc_type_check);
140 ebl->reloc_valid_use = EBLHOOK(reloc_valid_use);
141 ebl->copy_reloc_p = EBLHOOK(copy_reloc_p);
142 ebl->none_reloc_p = EBLHOOK(none_reloc_p);
143 #ifndef NO_RELATIVE_RELOC
144 ebl->relative_reloc_p = EBLHOOK(relative_reloc_p);