1 /* x86_64 specific symbolic name handling.
2 Copyright (C) 2002 Red Hat, Inc.
3 Written by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 This program is Open Source software; you can redistribute it and/or
6 modify it under the terms of the Open Software License version 1.0 as
7 published by the Open Source Initiative.
8
9 You should have received a copy of the Open Software License along
10 with this program; if not, you may obtain a copy of the Open Software
11 License version 1.0 from http://www.opensource.org/licenses/osl.php or
12 by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
13 3001 King Ranch Road, Ukiah, CA 95482. */
14
15 #ifdef HAVE_CONFIG_H
16 # include <config.h>
17 #endif
18
19 #include <assert.h>
20 #include <elf.h>
21 #include <stddef.h>
22
23 #include <libebl_x86_64.h>
24
25
26 /* Return of the backend. */
27 const char *
x86_64_backend_name(void)28 x86_64_backend_name (void)
29 {
30 return "x86-64";
31 }
32
33
34 /* Relocation mapping table. */
35 static struct
36 {
37 const char *name;
38 enum { both = 0, rel = 1, exec = 2 } appear;
39 } reloc_map_table[] =
40 {
41 [R_X86_64_NONE] = { "R_X86_64_NONE", both },
42 [R_X86_64_64] = { "R_X86_64_64", rel },
43 [R_X86_64_PC32] = { "R_X86_64_PC32", rel },
44 [R_X86_64_GOT32] = { "R_X86_64_GOT32", rel },
45 [R_X86_64_PLT32] = { "R_X86_64_PLT32", rel },
46 [R_X86_64_COPY] = { "R_X86_64_COPY", exec },
47 [R_X86_64_GLOB_DAT] = { "R_X86_64_GLOB_DAT", exec },
48 [R_X86_64_JUMP_SLOT] = { "R_X86_64_JUMP_SLOT", exec },
49 [R_X86_64_RELATIVE] = { "R_X86_64_RELATIVE", exec },
50 [R_X86_64_GOTPCREL] = { "R_X86_64_GOTPCREL", exec },
51 [R_X86_64_32] = { "R_X86_64_32", rel },
52 [R_X86_64_32S] = { "R_X86_64_32S", rel },
53 [R_X86_64_16] = { "R_X86_64_16", rel },
54 [R_X86_64_PC16] = { "R_X86_64_PC16", rel },
55 [R_X86_64_8] = { "R_X86_64_8", rel },
56 [R_X86_64_PC8] = { "R_X86_64_PC8", rel },
57 [R_X86_64_DTPMOD64] = { "R_X86_64_DTPMOD64", rel },
58 [R_X86_64_DTPOFF64] = { "R_X86_64_DTPOFF64", rel },
59 [R_X86_64_TPOFF64] = { "R_X86_64_TPOFF64", rel },
60 [R_X86_64_TLSGD] = { "R_X86_64_TLSGD", rel },
61 [R_X86_64_TLSLD] = { "R_X86_64_TLSLD", rel },
62 [R_X86_64_DTPOFF32] = { "R_X86_64_DTPOFF32", rel },
63 [R_X86_64_GOTTPOFF] = { "R_X86_64_GOTTPOFF", rel },
64 [R_X86_64_TPOFF32] = { "R_X86_64_TPOFF32", rel }
65 };
66
67
68 /* Determine relocation type string for x86-64. */
69 const char *
x86_64_reloc_type_name(int type,char * buf,size_t len)70 x86_64_reloc_type_name (int type, char *buf, size_t len)
71 {
72 if (type < 0 || type >= R_X86_64_NUM)
73 return NULL;
74
75 return reloc_map_table[type].name;
76 }
77
78
79 /* Check for correct relocation type. */
80 bool
x86_64_reloc_type_check(int type)81 x86_64_reloc_type_check (int type)
82 {
83 return (type >= R_X86_64_NONE && type < R_X86_64_NUM
84 && reloc_map_table[type].name != NULL) ? true : false;
85 }
86
87
88 /* Check for correct relocation type use. */
89 bool
x86_64_reloc_valid_use(Elf * elf,int type)90 x86_64_reloc_valid_use (Elf *elf, int type)
91 {
92 if (type < R_X86_64_NONE || type >= R_X86_64_NUM
93 || reloc_map_table[type].name == NULL)
94 return false;
95
96 Elf64_Ehdr *ehdr = elf64_getehdr (elf);
97 assert (ehdr != NULL);
98
99 if (reloc_map_table[type].appear == rel)
100 return ehdr->e_type == ET_REL;
101
102 if (reloc_map_table[type].appear == exec)
103 return ehdr->e_type != ET_REL;
104
105 assert (reloc_map_table[type].appear == both);
106 return true;
107 }
108