1#ifndef __UVWASI_SERDES_H__
2#define __UVWASI_SERDES_H__
3
4#include "wasi_types.h"
5
6/* Basic uint{8,16,32,64}_t read/write functions. */
7
8#define BASIC_TYPE(name, type)                                                \
9  void uvwasi_serdes_write_##name(void* ptr, size_t offset, type value);      \
10  type uvwasi_serdes_read_##name(const void* ptr, size_t offset);             \
11
12#define BASIC_TYPE_UVWASI(type) BASIC_TYPE(type, uvwasi_##type)
13
14#define UVWASI_SERDES_SIZE_uint8_t sizeof(uint8_t)
15BASIC_TYPE(uint8_t, uint8_t)
16#define UVWASI_SERDES_SIZE_uint16_t sizeof(uint16_t)
17BASIC_TYPE(uint16_t, uint16_t)
18#define UVWASI_SERDES_SIZE_uint32_t sizeof(uint32_t)
19BASIC_TYPE(uint32_t, uint32_t)
20#define UVWASI_SERDES_SIZE_uint64_t sizeof(uint64_t)
21BASIC_TYPE(uint64_t, uint64_t)
22
23#define UVWASI_SERDES_SIZE_advice_t sizeof(uvwasi_advice_t)
24BASIC_TYPE_UVWASI(advice_t)
25#define UVWASI_SERDES_SIZE_clockid_t sizeof(uvwasi_clockid_t)
26BASIC_TYPE_UVWASI(clockid_t)
27#define UVWASI_SERDES_SIZE_device_t sizeof(uvwasi_device_t)
28BASIC_TYPE_UVWASI(device_t)
29#define UVWASI_SERDES_SIZE_dircookie_t sizeof(uvwasi_dircookie_t)
30BASIC_TYPE_UVWASI(dircookie_t)
31#define UVWASI_SERDES_SIZE_eventrwflags_t sizeof(uvwasi_eventrwflags_t)
32BASIC_TYPE_UVWASI(eventrwflags_t)
33#define UVWASI_SERDES_SIZE_eventtype_t sizeof(uvwasi_eventtype_t)
34BASIC_TYPE_UVWASI(eventtype_t)
35#define UVWASI_SERDES_SIZE_exitcode_t sizeof(uvwasi_exitcode_t)
36BASIC_TYPE_UVWASI(exitcode_t)
37#define UVWASI_SERDES_SIZE_fd_t sizeof(uvwasi_fd_t)
38BASIC_TYPE_UVWASI(fd_t)
39#define UVWASI_SERDES_SIZE_fdflags_t sizeof(uvwasi_fdflags_t)
40BASIC_TYPE_UVWASI(fdflags_t)
41#define UVWASI_SERDES_SIZE_filesize_t sizeof(uvwasi_filesize_t)
42BASIC_TYPE_UVWASI(filesize_t)
43#define UVWASI_SERDES_SIZE_fstflags_t sizeof(uvwasi_fstflags_t)
44BASIC_TYPE_UVWASI(fstflags_t)
45#define UVWASI_SERDES_SIZE_inode_t sizeof(uvwasi_inode_t)
46BASIC_TYPE_UVWASI(inode_t)
47#define UVWASI_SERDES_SIZE_linkcount_t sizeof(uvwasi_linkcount_t)
48BASIC_TYPE_UVWASI(linkcount_t)
49#define UVWASI_SERDES_SIZE_lookupflags_t sizeof(uvwasi_lookupflags_t)
50BASIC_TYPE_UVWASI(lookupflags_t)
51#define UVWASI_SERDES_SIZE_oflags_t sizeof(uvwasi_oflags_t)
52BASIC_TYPE_UVWASI(oflags_t)
53#define UVWASI_SERDES_SIZE_preopentype_t sizeof(uvwasi_preopentype_t)
54BASIC_TYPE_UVWASI(preopentype_t)
55#define UVWASI_SERDES_SIZE_riflags_t sizeof(uvwasi_riflags_t)
56BASIC_TYPE_UVWASI(riflags_t)
57#define UVWASI_SERDES_SIZE_rights_t sizeof(uvwasi_rights_t)
58BASIC_TYPE_UVWASI(rights_t)
59#define UVWASI_SERDES_SIZE_roflags_t sizeof(uvwasi_roflags_t)
60BASIC_TYPE_UVWASI(roflags_t)
61#define UVWASI_SERDES_SIZE_sdflags_t sizeof(uvwasi_sdflags_t)
62BASIC_TYPE_UVWASI(sdflags_t)
63#define UVWASI_SERDES_SIZE_siflags_t sizeof(uvwasi_siflags_t)
64BASIC_TYPE_UVWASI(siflags_t)
65#define UVWASI_SERDES_SIZE_size_t sizeof(uvwasi_size_t)
66BASIC_TYPE_UVWASI(size_t)
67#define UVWASI_SERDES_SIZE_inode_t sizeof(uvwasi_inode_t)
68BASIC_TYPE_UVWASI(inode_t)
69#define UVWASI_SERDES_SIZE_signal_t sizeof(uvwasi_signal_t)
70BASIC_TYPE_UVWASI(signal_t)
71#define UVWASI_SERDES_SIZE_subclockflags_t sizeof(uvwasi_subclockflags_t)
72BASIC_TYPE_UVWASI(subclockflags_t)
73#define UVWASI_SERDES_SIZE_timestamp_t sizeof(uvwasi_timestamp_t)
74BASIC_TYPE_UVWASI(timestamp_t)
75#define UVWASI_SERDES_SIZE_userdata_t sizeof(uvwasi_userdata_t)
76BASIC_TYPE_UVWASI(userdata_t)
77#define UVWASI_SERDES_SIZE_whence_t sizeof(uvwasi_whence_t)
78BASIC_TYPE_UVWASI(whence_t)
79
80#undef BASIC_TYPE_UVWASI
81#undef BASIC_TYPE
82
83/* WASI structure read/write functions. */
84
85#define STRUCT(name)                                                          \
86  void uvwasi_serdes_write_##name(void* ptr,                                  \
87                                  size_t offset,                              \
88                                  const uvwasi_##name* value);                \
89  void uvwasi_serdes_read_##name(const void* ptr,                             \
90                                 size_t offset,                               \
91                                 uvwasi_##name* value);
92
93/* iovs currently only need to be read from WASM memory. */
94#define IOVS_STRUCT(name)                                                     \
95  uvwasi_errno_t uvwasi_serdes_read_##name(const void* ptr,                   \
96                                           size_t end,                        \
97                                           size_t offset,                     \
98                                           uvwasi_##name* value);
99
100#define UVWASI_SERDES_SIZE_ciovec_t 8
101IOVS_STRUCT(ciovec_t)
102
103#define UVWASI_SERDES_SIZE_iovec_t 8
104IOVS_STRUCT(iovec_t)
105
106#define UVWASI_SERDES_SIZE_dirent_t 24
107STRUCT(dirent_t)
108
109#define UVWASI_SERDES_SIZE_fdstat_t 24
110STRUCT(fdstat_t)
111
112#define UVWASI_SERDES_SIZE_filestat_t 64
113STRUCT(filestat_t)
114
115#define UVWASI_SERDES_SIZE_prestat_t 8
116STRUCT(prestat_t)
117
118#define UVWASI_SERDES_SIZE_event_t 32
119STRUCT(event_t)
120
121#define UVWASI_SERDES_SIZE_subscription_t 48
122STRUCT(subscription_t)
123
124#undef STRUCT
125#undef IOVS_STRUCT
126
127uvwasi_errno_t uvwasi_serdes_readv_ciovec_t(const void* ptr,
128                                            size_t end,
129                                            size_t offset,
130                                            uvwasi_ciovec_t* iovs,
131                                            uvwasi_size_t iovs_len);
132
133uvwasi_errno_t uvwasi_serdes_readv_iovec_t(const void* ptr,
134                                           size_t end,
135                                           size_t offset,
136                                           uvwasi_iovec_t* iovs,
137                                           uvwasi_size_t iovs_len);
138
139/* Helper functions for memory bounds checking. */
140int uvwasi_serdes_check_bounds(size_t offset, size_t end, size_t size);
141int uvwasi_serdes_check_array_bounds(size_t offset,
142                                     size_t end,
143                                     size_t size,
144                                     size_t count);
145
146#endif /* __UVWASI_SERDES_H__ */
147