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,int * addsub)42 sparc_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
43 int *addsub __attribute__ ((unused)))
44 {
45 switch (type)
46 {
47 case R_SPARC_8:
48 return ELF_T_BYTE;
49 case R_SPARC_16:
50 case R_SPARC_UA16:
51 return ELF_T_HALF;
52 case R_SPARC_32:
53 case R_SPARC_UA32:
54 return ELF_T_WORD;
55 case R_SPARC_64:
56 case R_SPARC_UA64:
57 return ELF_T_XWORD;
58 default:
59 return ELF_T_NUM;
60 }
61 }
62
63 /* Check whether machine flags are valid. */
64 bool
sparc_machine_flag_check(GElf_Word flags)65 sparc_machine_flag_check (GElf_Word flags)
66 {
67 return ((flags &~ (EF_SPARCV9_MM
68 | EF_SPARC_LEDATA
69 | EF_SPARC_32PLUS
70 | EF_SPARC_SUN_US1
71 | EF_SPARC_SUN_US3)) == 0);
72 }
73
74 bool
sparc_check_special_section(Ebl * ebl,int ndx,const GElf_Shdr * shdr,const char * sname)75 sparc_check_special_section (Ebl *ebl,
76 int ndx __attribute__ ((unused)),
77 const GElf_Shdr *shdr,
78 const char *sname __attribute__ ((unused)))
79 {
80 if ((shdr->sh_flags & (SHF_WRITE | SHF_EXECINSTR))
81 == (SHF_WRITE | SHF_EXECINSTR))
82 {
83 /* This is ordinarily flagged, but is valid for a PLT on SPARC.
84
85 Look for the SHT_DYNAMIC section and the DT_PLTGOT tag in it.
86 Its d_ptr should match the .plt section's sh_addr. */
87
88 Elf_Scn *scn = NULL;
89 while ((scn = elf_nextscn (ebl->elf, scn)) != NULL)
90 {
91 GElf_Shdr scn_shdr;
92 if (likely (gelf_getshdr (scn, &scn_shdr) != NULL)
93 && scn_shdr.sh_type == SHT_DYNAMIC
94 && scn_shdr.sh_entsize != 0)
95 {
96 Elf_Data *data = elf_getdata (scn, NULL);
97 if (data != NULL)
98 for (size_t i = 0; i < data->d_size / scn_shdr.sh_entsize; ++i)
99 {
100 GElf_Dyn dyn;
101 if (unlikely (gelf_getdyn (data, i, &dyn) == NULL))
102 break;
103 if (dyn.d_tag == DT_PLTGOT)
104 return dyn.d_un.d_ptr == shdr->sh_addr;
105 }
106 break;
107 }
108 }
109 }
110
111 return false;
112 }
113
114 const char *
sparc_symbol_type_name(int type,char * buf,size_t len)115 sparc_symbol_type_name (int type,
116 char *buf __attribute__ ((unused)),
117 size_t len __attribute__ ((unused)))
118 {
119 switch (type)
120 {
121 case STT_SPARC_REGISTER:
122 return "SPARC_REGISTER";
123 }
124 return NULL;
125 }
126
127 const char *
sparc_dynamic_tag_name(int64_t tag,char * buf,size_t len)128 sparc_dynamic_tag_name (int64_t tag,
129 char *buf __attribute__ ((unused)),
130 size_t len __attribute__ ((unused)))
131 {
132 switch (tag)
133 {
134 case DT_SPARC_REGISTER:
135 return "SPARC_REGISTER";
136 }
137 return NULL;
138 }
139
140 bool
sparc_dynamic_tag_check(int64_t tag)141 sparc_dynamic_tag_check (int64_t tag)
142 {
143 switch (tag)
144 {
145 case DT_SPARC_REGISTER:
146 return true;
147 }
148 return false;
149 }
150