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65 lines
2.2 KiB
65 lines
2.2 KiB
/*
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* Raw syscalls.
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*
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* Copyright (c) 2018 The strace developers.
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* All rights reserved.
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*
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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
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* are met:
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* 1. 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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* 2. 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* 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
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef STRACE_RAW_SYSCALL_H
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#define STRACE_RAW_SYSCALL_H
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# include "kernel_types.h"
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static inline kernel_ulong_t
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raw_syscall_0(const kernel_ulong_t nr, kernel_ulong_t *err)
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{
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*err = 0;
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#ifdef __thumb__ /* && FRAME_POINTERS_ENABLED */
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register kernel_ulong_t rt;
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register kernel_ulong_t r0 __asm__("r0");
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__asm__ __volatile__("mov %1,r7; mov r7,%2; swi 0x0; mov r7,%1"
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: "=r"(r0), "=&r"(rt)
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: "r"(nr)
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: "memory");
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#else
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register kernel_ulong_t r7 __asm__("r7") = nr;
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register kernel_ulong_t r0 __asm__("r0");
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__asm__ __volatile__("swi 0x0"
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: "=r"(r0)
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: "r"(r7)
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: "memory");
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#endif
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return r0;
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}
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# define raw_syscall_0 raw_syscall_0
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#endif /* !STRACE_RAW_SYSCALL_H */
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