1 /* SPARC specific symbolic name handling.
2 Copyright (C) 2002, 2003, 2005, 2007, 2008 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Jakub Jelinek <jakub@redhat.com>, 2002.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of either
8
9 * the GNU Lesser General Public License as published by the Free
10 Software Foundation; either version 3 of the License, or (at
11 your option) any later version
12
13 or
14
15 * the GNU General Public License as published by the Free
16 Software Foundation; either version 2 of the License, or (at
17 your option) any later version
18
19 or both in parallel, as here.
20
21 elfutils is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
25
26 You should have received copies of the GNU General Public License and
27 the GNU Lesser General Public License along with this program. If
28 not, see <http://www.gnu.org/licenses/>. */
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <elf.h>
35 #include <stddef.h>
36
37 #define BACKEND sparc_
38 #include "libebl_CPU.h"
39
40 /* Check for the simple reloc types. */
41 Elf_Type
sparc_reloc_simple_type(Ebl * ebl,int type)42 sparc_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type)
43 {
44 switch (type)
45 {
46 case R_SPARC_8:
47 return ELF_T_BYTE;
48 case R_SPARC_16:
49 case R_SPARC_UA16:
50 return ELF_T_HALF;
51 case R_SPARC_32:
52 case R_SPARC_UA32:
53 return ELF_T_WORD;
54 case R_SPARC_64:
55 case R_SPARC_UA64:
56 return ELF_T_XWORD;
57 default:
58 return ELF_T_NUM;
59 }
60 }
61
62 /* Check whether machine flags are valid. */
63 bool
sparc_machine_flag_check(GElf_Word flags)64 sparc_machine_flag_check (GElf_Word flags)
65 {
66 return ((flags &~ (EF_SPARCV9_MM
67 | EF_SPARC_LEDATA
68 | EF_SPARC_32PLUS
69 | EF_SPARC_SUN_US1
70 | EF_SPARC_SUN_US3)) == 0);
71 }
72
73 bool
sparc_check_special_section(Ebl * ebl,int ndx,const GElf_Shdr * shdr,const char * sname)74 sparc_check_special_section (Ebl *ebl,
75 int ndx __attribute__ ((unused)),
76 const GElf_Shdr *shdr,
77 const char *sname __attribute__ ((unused)))
78 {
79 if ((shdr->sh_flags & (SHF_WRITE | SHF_EXECINSTR))
80 == (SHF_WRITE | SHF_EXECINSTR))
81 {
82 /* This is ordinarily flagged, but is valid for a PLT on SPARC.
83
84 Look for the SHT_DYNAMIC section and the DT_PLTGOT tag in it.
85 Its d_ptr should match the .plt section's sh_addr. */
86
87 Elf_Scn *scn = NULL;
88 while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
89 {
90 GElf_Shdr scn_shdr;
91 if (likely (gelf_getshdr (scn, &scn_shdr) != NULL)
92 && scn_shdr.sh_type == SHT_DYNAMIC
93 && scn_shdr.sh_entsize != 0)
94 {
95 Elf_Data *data = elf_getdata (scn, NULL);
96 if (data != NULL)
97 for (size_t i = 0; i < data->d_size / scn_shdr.sh_entsize; ++i)
98 {
99 GElf_Dyn dyn;
100 if (unlikely (gelf_getdyn (data, i, &dyn) == NULL))
101 break;
102 if (dyn.d_tag == DT_PLTGOT)
103 return dyn.d_un.d_ptr == shdr->sh_addr;
104 }
105 break;
106 }
107 }
108 }
109
110 return false;
111 }
112
113 const char *
sparc_symbol_type_name(int type,char * buf,size_t len)114 sparc_symbol_type_name (int type,
115 char *buf __attribute__ ((unused)),
116 size_t len __attribute__ ((unused)))
117 {
118 switch (type)
119 {
120 case STT_SPARC_REGISTER:
121 return "SPARC_REGISTER";
122 }
123 return NULL;
124 }
125
126 const char *
sparc_dynamic_tag_name(int64_t tag,char * buf,size_t len)127 sparc_dynamic_tag_name (int64_t tag,
128 char *buf __attribute__ ((unused)),
129 size_t len __attribute__ ((unused)))
130 {
131 switch (tag)
132 {
133 case DT_SPARC_REGISTER:
134 return "SPARC_REGISTER";
135 }
136 return NULL;
137 }
138
139 bool
sparc_dynamic_tag_check(int64_t tag)140 sparc_dynamic_tag_check (int64_t tag)
141 {
142 switch (tag)
143 {
144 case DT_SPARC_REGISTER:
145 return true;
146 }
147 return false;
148 }
149