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
|
/*
* Copyright © 2021 Michael Smith <mikesmiffy128@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* Unix-specific definitions for os.h - don't include this directly! */
#ifdef __GNUC__
#define EXPORT __attribute__((visibility("default")))
#else
#define EXPORT int novis[-!!"visibility attribute requires Clang or GCC"];
#endif
#define IMPORT
typedef char os_char;
#define OS_LIT(x) x
#define os_snprintf snprintf
#define os_strchr strchr
#define os_strcmp strcmp
#define os_strcpy strcpy
#define os_strlen strlen
#define os_fopen fopen
#define os_open open
#define os_access access
#define os_stat stat
#define os_getenv getenv
#define OS_DLSUFFIX ".so"
#define OS_MAIN main
#define os_dlsym dlsym
// unix mprot flags are much nicer but cannot be defined in terms of the windows
// ones, so we use the windows ones and define them in terms of the unix ones.
// another victory for stupid!
#define PAGE_NOACCESS 0
#define PAGE_READONLY PROT_READ
#define PAGE_READWRITE PROT_READ | PROT_WRITE
#define PAGE_EXECUTE_READ PROT_READ | PROT_EXEC
#define PAGE_EXECUTE_READWRITE PROT_READ | PROT_WRITE | PROT_EXEC
static inline bool os_mprot(void *addr, int len, int fl) {
// round down address and round up size
addr = (void *)((unsigned long)addr & ~(4095));
len = len + 4095 & ~(4095);
return mprotect(addr, len, fl) != -1;
}
static inline void os_randombytes(void *buf, int sz) {
// if this call fails, the system is doomed, so loop until success and pray.
while (getentropy(buf, sz) == -1);
}
// vi: sw=4 ts=4 noet tw=80 cc=80
|
