67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
/*
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Copyright (c) 2013 Andes Technology Corporation.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of the company may not be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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SYNOPSIS
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#include <unistd.h>
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int isatty(int fildes);
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RETURN VALUE
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The isatty() function shall return 1 if fildes is associated with
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a terminal; otherwise, it shall return 0 and may set errno
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to indicate the error.
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*/
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#ifdef __NDS32_VH__
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#include "vh.h"
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.extern _impure_ptr
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TYPE0 _isatty, VH_ISATTY
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#else /* not __NDS32_VH__ */
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#include "../syscall.h"
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#include "syscall_extra.h"
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.text
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.global _isatty
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.type _isatty, @function
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.align 2
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_isatty:
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syscall SYS_isatty /* Make syscall with SWID=`SYS_isatty'.
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Reture value `0' stored in $r0 means
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there is something wrong. */
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bnez $r0, 1f /* Branch if success. */
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syscall SYS_geterr /* There is something wrong. */
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l.w $r15, _impure_ptr
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swi $r0, [$r15] /* Set errno. */
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move $r0, #0
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1:
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ret
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.size _isatty, .-_isatty
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#endif /* not __NDS32_VH__ */
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