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
|
/*
* nanowasm, a tiny WebAssembly/Wasm interpreter
* Copyright (C) 2023-2024 Xavier Del Campo Romero
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
#include <nanowasm/nw.h>
#include <nw/interp.h>
#include <nw/io.h>
#include <nw/log.h>
#include <nw/routines.h>
static enum nw_state loop(struct nw_mod *const m)
{
struct nw_sm_gl *const gl = &m->sm.global;
const enum nw_state n = nwp_interp_run(&gl->interp);
if (n)
return n;
m->next = nwp_section_exit;
return NW_AGAIN;
}
static enum nw_state get_global(struct nw_mod *const m)
{
struct nw_sm_gl *const gl = &m->sm.global;
const struct nw_interp_cfg cfg =
{
.stack =
{
.buf = &gl->value,
.n = sizeof gl->value
},
.m = m,
.io = m->cfg.io
};
if (nwp_interp_start(&cfg, &nwp_interp_initexpr_set, &gl->interp))
{
LOG("%s: nw_interp_start failed\n", __func__);
return NW_FATAL;
}
m->next = loop;
return NW_AGAIN;
}
static enum nw_state get_mutability(struct nw_mod *const m)
{
nw_varuint1 mutability;
const struct nw_io_cfg *const cfg = &m->cfg.io;
struct nw_sm_gl *const gl = &m->sm.global;
struct nw_sm_leb128 *const l = &gl->leb128;
const enum nw_state n = nwp_varuint1(cfg, l, &mutability);
if (n)
return n;
m->next = get_global;
return NW_AGAIN;
}
static int get_type(const nw_varint7 content_type, enum nw_type *const out)
{
static const struct type
{
nw_varint7 key;
enum nw_type value;
} list[] =
{
{.key = 0x7f, .value = NW_TYPE_I32},
{.key = 0x7e, .value = NW_TYPE_I64},
{.key = 0x7d, .value = NW_TYPE_F32},
{.key = 0x7c, .value = NW_TYPE_F64}
};
for (size_t i = 0; i < sizeof list / sizeof *list; i++)
{
const struct type *const t = &list[i];
if (content_type == t->key)
{
*out = t->value;
return 0;
}
}
LOG("%s: invalid type: %#hhx\n", __func__, (char)content_type);
return -1;
}
static enum nw_state get_content_type(struct nw_mod *const m)
{
nw_varint7 content_type;
const struct nw_io_cfg *const cfg = &m->cfg.io;
struct nw_sm_gl *const gl = &m->sm.global;
struct nw_sm_leb128 *const l = &gl->leb128;
const enum nw_state n = nwp_varint7(cfg, l, &content_type);
if (n)
return n;
else if (get_type(content_type, &gl->type))
{
LOG("%s: get_type failed\n", __func__);
return NW_FATAL;
}
m->next = get_mutability;
return NW_AGAIN;
}
static enum nw_state entry_loop(struct nw_mod *const m)
{
const struct nw_sm_gl *const gl = &m->sm.global;
m->next = gl->entry_i < m->global_count ?
get_content_type : nwp_section_exit;
return NW_AGAIN;
}
static enum nw_state get_count(struct nw_mod *const m)
{
const struct nw_io_cfg *const cfg = &m->cfg.io;
struct nw_sm_gl *const gl = &m->sm.global;
struct nw_sm_leb128 *const l = &gl->leb128;
const enum nw_state n = nwp_varuint32(cfg, l, &m->global_count);
if (n)
return n;
m->next = entry_loop;
return NW_AGAIN;
}
void nwp_section_global(struct nw_mod *const m)
{
m->next = get_count;
m->sm.global = (const struct nw_sm_gl){0};
}
|
