Line data Source code
1 : /* Arm specific symbolic name handling.
2 : Copyright (C) 2002-2009, 2014, 2015, 2017 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 : #ifdef HAVE_CONFIG_H
30 : # include <config.h>
31 : #endif
32 :
33 : #include <elf.h>
34 : #include <stddef.h>
35 : #include <string.h>
36 :
37 : #define BACKEND arm_
38 : #include "libebl_CPU.h"
39 :
40 :
41 : const char *
42 0 : arm_segment_type_name (int segment, char *buf __attribute__ ((unused)),
43 : size_t len __attribute__ ((unused)))
44 : {
45 0 : switch (segment)
46 : {
47 : case PT_ARM_EXIDX:
48 : return "ARM_EXIDX";
49 : }
50 0 : return NULL;
51 : }
52 :
53 : /* Return symbolic representation of section type. */
54 : const char *
55 71 : arm_section_type_name (int type,
56 : char *buf __attribute__ ((unused)),
57 : size_t len __attribute__ ((unused)))
58 : {
59 71 : switch (type)
60 : {
61 : case SHT_ARM_EXIDX:
62 : return "ARM_EXIDX";
63 0 : case SHT_ARM_PREEMPTMAP:
64 0 : return "ARM_PREEMPTMAP";
65 1 : case SHT_ARM_ATTRIBUTES:
66 1 : return "ARM_ATTRIBUTES";
67 : }
68 :
69 69 : return NULL;
70 : }
71 :
72 : /* Check whether machine flags are valid. */
73 : bool
74 0 : arm_machine_flag_check (GElf_Word flags)
75 : {
76 0 : switch (flags & EF_ARM_EABIMASK)
77 : {
78 : case EF_ARM_EABI_UNKNOWN:
79 : case EF_ARM_EABI_VER1:
80 : case EF_ARM_EABI_VER2:
81 : case EF_ARM_EABI_VER3:
82 : case EF_ARM_EABI_VER4:
83 : case EF_ARM_EABI_VER5:
84 0 : break;
85 : default:
86 : return false;
87 : }
88 :
89 0 : return ((flags &~ (EF_ARM_EABIMASK
90 : | EF_ARM_RELEXEC
91 : | EF_ARM_HASENTRY
92 : | EF_ARM_INTERWORK
93 : | EF_ARM_APCS_26
94 : | EF_ARM_APCS_FLOAT
95 : | EF_ARM_PIC
96 : | EF_ARM_ALIGN8
97 : | EF_ARM_NEW_ABI
98 : | EF_ARM_OLD_ABI
99 : | EF_ARM_SOFT_FLOAT
100 : | EF_ARM_VFP_FLOAT
101 : | EF_ARM_MAVERICK_FLOAT
102 : | EF_ARM_SYMSARESORTED
103 : | EF_ARM_DYNSYMSUSESEGIDX
104 : | EF_ARM_MAPSYMSFIRST
105 : | EF_ARM_EABIMASK
106 : | EF_ARM_BE8
107 0 : | EF_ARM_LE8)) == 0);
108 : }
109 :
110 : /* Check for the simple reloc types. */
111 : Elf_Type
112 0 : arm_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type,
113 : int *addsub __attribute__ ((unused)))
114 : {
115 0 : switch (type)
116 : {
117 : case R_ARM_ABS32:
118 : return ELF_T_WORD;
119 : case R_ARM_ABS16:
120 : return ELF_T_HALF;
121 : case R_ARM_ABS8:
122 : return ELF_T_BYTE;
123 : default:
124 : return ELF_T_NUM;
125 : }
126 : }
127 :
128 : /* The SHT_ARM_EXIDX section type is a valid target for relocation. */
129 : bool
130 0 : arm_check_reloc_target_type (Ebl *ebl __attribute__ ((unused)), Elf64_Word sh_type)
131 : {
132 0 : return sh_type == SHT_ARM_EXIDX;
133 : }
134 :
135 : const char *
136 0 : arm_symbol_type_name (int type,
137 : char *buf __attribute__ ((unused)),
138 : size_t len __attribute__ ((unused)))
139 : {
140 0 : switch (type)
141 : {
142 : case STT_ARM_TFUNC:
143 : return "ARM_TFUNC";
144 : }
145 0 : return NULL;
146 : }
147 :
148 : /* A data mapping symbol is a symbol with "$d" name or "$d.<any...>" name,
149 : * STT_NOTYPE, STB_LOCAL and st_size of zero. The indicate the stat of a
150 : * sequence of data items. */
151 : bool
152 4 : arm_data_marker_symbol (const GElf_Sym *sym, const char *sname)
153 : {
154 4 : return (sym != NULL && sname != NULL
155 4 : && sym->st_size == 0 && GELF_ST_BIND (sym->st_info) == STB_LOCAL
156 4 : && GELF_ST_TYPE (sym->st_info) == STT_NOTYPE
157 8 : && (strcmp (sname, "$d") == 0 || strncmp (sname, "$d.", 3) == 0));
158 : }
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