blob: 22f1d8206f4fe716d5be37006b8894e93d0f81e3 (
plain)
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
|
/*
* Copyright (C) 2020 Embecosm Limited
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <machine/syscall.h>
#include "semihost_syscall.h"
#include "semihost_fdtable.h"
#include <errno.h>
#include <string.h>
#include <fcntl.h>
extern int errno;
#define SEMIHOST_MODE_R 0
#define SEMIHOST_MODE_RPLUS 2
#define SEMIHOST_MODE_W 4
#define SEMIHOST_MODE_WPLUS 6
#define SEMIHOST_MODE_A 8
#define SEMIHOST_MODE_APLUS 10
/* Open a file. */
int
_open (const char *name, int flags, ...)
{
int fh;
int mode;
long data_block[3];
/* Work out mode from flags. */
if ((flags & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
mode = SEMIHOST_MODE_R;
else if ((flags & (O_WRONLY | O_CREAT | O_TRUNC))
== (O_WRONLY | O_CREAT | O_TRUNC))
mode = SEMIHOST_MODE_W;
else if ((flags & (O_WRONLY | O_CREAT | O_APPEND))
== (O_WRONLY | O_CREAT | O_APPEND))
mode = SEMIHOST_MODE_A;
else if ((flags & (O_RDWR | O_CREAT | O_TRUNC))
== (O_RDWR | O_CREAT | O_TRUNC))
mode = SEMIHOST_MODE_WPLUS;
else if ((flags & (O_RDWR | O_CREAT | O_APPEND))
== (O_RDWR | O_CREAT | O_APPEND))
mode = SEMIHOST_MODE_APLUS;
else if (flags & O_RDWR)
mode = SEMIHOST_MODE_RPLUS;
else
{
errno = EINVAL;
return -1;
}
data_block[0] = (long) name;
data_block[1] = mode;
data_block[2] = strlen (name);
fh = syscall_errno (SEMIHOST_open, data_block);
/* Failed to open file. */
if (fh == -1)
return -1;
/* Register the file in the fdtable. */
return __add_fdentry (fh);
}
|
