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