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9b12e4fe JC |
1 | // Copyright 2015 The Go Authors. All rights reserved. |
2 | // Use of this source code is governed by a BSD-style | |
3 | // license that can be found in the LICENSE file. | |
4 | ||
5 | // +build gccgo | |
6 | ||
7 | #include <errno.h> | |
8 | #include <stdint.h> | |
9 | #include <unistd.h> | |
10 | ||
11 | #define _STRINGIFY2_(x) #x | |
12 | #define _STRINGIFY_(x) _STRINGIFY2_(x) | |
13 | #define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__) | |
14 | ||
15 | // Call syscall from C code because the gccgo support for calling from | |
16 | // Go to C does not support varargs functions. | |
17 | ||
18 | struct ret { | |
19 | uintptr_t r; | |
20 | uintptr_t err; | |
21 | }; | |
22 | ||
23 | struct ret | |
24 | 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) | |
25 | { | |
26 | struct ret r; | |
27 | ||
28 | errno = 0; | |
29 | r.r = syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9); | |
30 | r.err = errno; | |
31 | return r; | |
32 | } | |
33 | ||
34 | // Define the use function in C so that it is not inlined. | |
35 | ||
36 | extern void use(void *) __asm__ (GOSYM_PREFIX GOPKGPATH ".use") __attribute__((noinline)); | |
37 | ||
38 | void | |
39 | use(void *p __attribute__ ((unused))) | |
40 | { | |
41 | } |