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42 lines
1014 B
42 lines
1014 B
8 years ago
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build gccgo
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#include <errno.h>
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#include <stdint.h>
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#include <unistd.h>
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#define _STRINGIFY2_(x) #x
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#define _STRINGIFY_(x) _STRINGIFY2_(x)
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#define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__)
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// Call syscall from C code because the gccgo support for calling from
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// Go to C does not support varargs functions.
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struct ret {
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uintptr_t r;
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uintptr_t err;
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};
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struct ret
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gccgoRealSyscall(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
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{
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struct ret r;
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errno = 0;
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r.r = syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9);
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r.err = errno;
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return r;
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}
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// Define the use function in C so that it is not inlined.
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extern void use(void *) __asm__ (GOSYM_PREFIX GOPKGPATH ".use") __attribute__((noinline));
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void
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use(void *p __attribute__ ((unused)))
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{
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}
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