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42 lines
1.5 KiB
ArmAsm
42 lines
1.5 KiB
ArmAsm
/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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/* TILE-Gx specifies that "unsigned int" is sign extended in the high
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32 bits. But since the userspace API claims to be "unsigned long",
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calls into __ioctl() will not be sign extended, but rather pass all
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64 bits of the argument. Therefore, when we pass the "request"
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value to the kernel, we must explicitly sign-extend it to match the
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kernel's internal use of "unsigned int" as the second argument,
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which we do by casting to "unsigned int". */
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#include <sysdep.h>
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.text
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ENTRY (__ioctl)
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FEEDBACK_ENTER(__ioctl)
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{
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addxi r1, r1, 0
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moveli TREG_SYSCALL_NR_NAME, __NR_ioctl
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}
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swint1
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BNEZ r1, 0f
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jrp lr
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PSEUDO_END (__ioctl)
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weak_alias (__ioctl, ioctl)
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