1 /*
2 * Copyright 2023 NXP
3 * All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 */
7
8 #if defined(__GNUC__)
9 #include <stdint.h>
10 #include <errno.h>
11 #include <sys/stat.h>
12 #endif
13
14 /*
15 * This file defines the libnosys.a syscall functions.
16 * After upgraded to ARMGCC 12.2.1 with binutils 2.39, there are build warnings
17 * when link the libnosys.a, such as using -lnosys or using --specs=--specs=nosys.specs.
18 *
19 * The build warnings are like:
20 * (libc_a-closer.o): in function `_close_r': closer.c:(.text._close_r+0xc):
21 * warning: _close is not implemented and will always fail
22 *
23 * If you don't want to use the functions in this file, then define SDK_USE_SYSCALL_STUB
24 * as 0.
25 */
26
27 /*******************************************************************************
28 * Definitions
29 ******************************************************************************/
30 #ifndef SDK_USE_SYSCALL_STUB
31 #define SDK_USE_SYSCALL_STUB 1
32 #endif
33
34 /*******************************************************************************
35 * Code
36 ******************************************************************************/
37 #if defined(__GNUC__)
38
39 #if SDK_USE_SYSCALL_STUB
40
41 /*
42 * When SDK_DEBUGCONSOLE_UART defined, the _write and _read will be defined in
43 * fsl_debug_console.
44 */
45 #if !defined(SDK_DEBUGCONSOLE_UART)
46 int __attribute__((weak)) _write(int handle, char *buffer, int size);
_write(int handle,char * buffer,int size)47 int __attribute__((weak)) _write(int handle, char *buffer, int size)
48 {
49 errno = ENOSYS;
50 return -1;
51 }
52
53 int __attribute__((weak)) _read(int handle, char *buffer, int size);
_read(int handle,char * buffer,int size)54 int __attribute__((weak)) _read(int handle, char *buffer, int size)
55 {
56 errno = ENOSYS;
57 return -1;
58 }
59 #endif /* SDK_DEBUGCONSOLE_UART */
60
61 int __attribute__((weak)) _close(int f);
_close(int f)62 int __attribute__((weak)) _close(int f)
63 {
64 errno = ENOSYS;
65 return -1;
66 }
67
68 int __attribute__((weak)) _lseek(int f, int ptr, int dir);
_lseek(int f,int ptr,int dir)69 int __attribute__((weak)) _lseek(int f, int ptr, int dir)
70 {
71 errno = ENOSYS;
72 return -1;
73 }
74
75 int __attribute__((weak)) _fstat(int fs, struct stat *st);
_fstat(int fs,struct stat * st)76 int __attribute__((weak)) _fstat(int fs, struct stat *st)
77 {
78 errno = ENOSYS;
79 return -1;
80 }
81
82 int __attribute__((weak)) _getpid(void);
_getpid(void)83 int __attribute__((weak)) _getpid(void)
84 {
85 errno = ENOSYS;
86 return -1;
87 }
88
89 int __attribute__((weak)) _isatty(int f);
_isatty(int f)90 int __attribute__((weak)) _isatty(int f)
91 {
92 errno = ENOSYS;
93 return 0;
94 }
95
96 int __attribute__((weak)) _kill(int pid, int sig);
_kill(int pid,int sig)97 int __attribute__((weak)) _kill(int pid, int sig)
98 {
99 errno = ENOSYS;
100 return -1;
101 }
102
103 int __attribute__((weak)) _link(const char *path1, const char *path2);
_link(const char * path1,const char * path2)104 int __attribute__((weak)) _link(const char *path1, const char *path2)
105 {
106 errno = ENOSYS;
107 return -1;
108 }
109
110 int __attribute__((weak)) _unlink(const char *path);
_unlink(const char * path)111 int __attribute__((weak)) _unlink(const char *path)
112 {
113 errno = ENOSYS;
114 return -1;
115 }
116
117 int __attribute__((weak)) _open(const char *filename, int oflag);
_open(const char * filename,int oflag)118 int __attribute__((weak)) _open(const char *filename, int oflag)
119 {
120 errno = ENOSYS;
121 return -1;
122 }
123
124 int __attribute__((weak)) _stat (const char *f, struct stat *st);
_stat(const char * f,struct stat * st)125 int __attribute__((weak)) _stat (const char *f, struct stat *st)
126 {
127 errno = ENOSYS;
128 return -1;
129 }
130
131 #endif /* SDK_USE_SYSCALL_STUB */
132
133 #endif /* __GNUC__ */
134
