1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/* 32-bit ELF for the WebAssembly target
Copyright (C) 2017-2018 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "bfd_stdint.h"
#include "libiberty.h"
#include "elf/wasm32.h"
static reloc_howto_type elf32_wasm32_howto_table[] =
{
HOWTO (R_WASM32_NONE, /* type */
0, /* rightshift */
3, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_WASM32_NONE", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
FALSE), /* pcrel_offset */
/* 32 bit absolute */
HOWTO (R_WASM32_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_WASM32_32", /* name */
FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
};
/* Look up the relocation CODE. */
static reloc_howto_type *
elf32_wasm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
switch (code)
{
case BFD_RELOC_NONE:
return &elf32_wasm32_howto_table[R_WASM32_NONE];
case BFD_RELOC_32:
return &elf32_wasm32_howto_table[R_WASM32_32];
default:
break;
}
return NULL;
}
/* Look up the relocation R_NAME. */
static reloc_howto_type *
elf32_wasm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *r_name)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE (elf32_wasm32_howto_table); i++)
if (elf32_wasm32_howto_table[i].name != NULL
&& strcasecmp (elf32_wasm32_howto_table[i].name, r_name) == 0)
return &elf32_wasm32_howto_table[i];
return NULL;
}
/* Look up the relocation R_TYPE. */
static reloc_howto_type *
elf32_wasm32_rtype_to_howto (bfd *abfd, unsigned r_type)
{
unsigned int i = r_type;
if (i >= ARRAY_SIZE (elf32_wasm32_howto_table))
{
/* xgettext:c-format */
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
abfd, r_type);
i = R_WASM32_NONE;
}
if (elf32_wasm32_howto_table[i].type != r_type)
return NULL;
return &elf32_wasm32_howto_table[i];
}
/* Translate the ELF-internal relocation RELA into CACHE_PTR. */
static void
elf32_wasm32_info_to_howto_rela (bfd *abfd,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
cache_ptr->howto = elf32_wasm32_rtype_to_howto (abfd, r_type);
}
#define ELF_ARCH bfd_arch_wasm32
#define ELF_TARGET_ID EM_WEBASSEMBLY
#define ELF_MACHINE_CODE EM_WEBASSEMBLY
/* FIXME we don't have paged executables, see:
https://github.com/pipcet/binutils-gdb/issues/4 */
#define ELF_MAXPAGESIZE 4096
#define TARGET_LITTLE_SYM wasm32_elf32_vec
#define TARGET_LITTLE_NAME "elf32-wasm32"
#define elf_backend_can_gc_sections 1
#define elf_backend_rela_normal 1
/* For testing. */
#define elf_backend_want_dynrelro 1
#define elf_info_to_howto elf32_wasm32_info_to_howto_rela
#define elf_info_to_howto_rel NULL
#define bfd_elf32_bfd_reloc_type_lookup elf32_wasm32_reloc_type_lookup
#define bfd_elf32_bfd_reloc_name_lookup elf32_wasm32_reloc_name_lookup
#define ELF_DYNAMIC_INTERPRETER "/sbin/elf-dynamic-interpreter.so"
#define elf_backend_want_got_plt 1
#define elf_backend_plt_readonly 1
#define elf_backend_got_header_size 0
#include "elf32-target.h"
|
