source: trunk/libs/newlib/src/libgloss/nds32/_isatty.S @ 467

Last change on this file since 467 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 2.3 KB
Line 
1/*
2Copyright (c) 2013 Andes Technology Corporation.
3All rights reserved.
4
5Redistribution and use in source and binary forms, with or without
6modification, are permitted provided that the following conditions are met:
7
8    Redistributions of source code must retain the above copyright
9    notice, this list of conditions and the following disclaimer.
10
11    Redistributions in binary form must reproduce the above copyright
12    notice, this list of conditions and the following disclaimer in the
13    documentation and/or other materials provided with the distribution.
14
15    The name of the company may not be used to endorse or promote
16    products derived from this software without specific prior written
17    permission.
18
19THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
23DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29*/
30/*
31  SYNOPSIS
32    #include <unistd.h>
33    int isatty(int fildes);
34  RETURN VALUE
35    The isatty() function shall return 1 if fildes is associated with
36    a terminal;  otherwise, it shall return 0 and may set errno
37    to indicate the error.
38*/
39#ifdef __NDS32_VH__
40
41#include "vh.h"
42.extern _impure_ptr
43TYPE0 _isatty, VH_ISATTY
44
45#else   /* not __NDS32_VH__ */
46
47#include "../syscall.h"
48#include "syscall_extra.h"
49        .text
50        .global _isatty
51        .type   _isatty, @function
52        .align  2
53_isatty:
54        syscall SYS_isatty      /* Make syscall with SWID=`SYS_isatty'.
55                                   Reture value `0' stored in $r0 means
56                                   there is something wrong.  */
57        bnez    $r0, 1f         /* Branch if success.  */
58        syscall SYS_geterr      /* There is something wrong.  */
59        l.w     $r15, _impure_ptr
60        swi     $r0, [$r15]     /* Set errno.  */
61        move    $r0, #0
621:
63        ret
64        .size   _isatty, .-_isatty
65
66#endif  /* not __NDS32_VH__ */
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