github.com/Andyfoo/golang/x/sys@v0.0.0-20190901054642-57c1bf301704/unix/gccgo_c.c (about)

     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  // +build !aix
     7  
     8  #include <errno.h>
     9  #include <stdint.h>
    10  #include <unistd.h>
    11  
    12  #define _STRINGIFY2_(x) #x
    13  #define _STRINGIFY_(x) _STRINGIFY2_(x)
    14  #define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__)
    15  
    16  // Call syscall from C code because the gccgo support for calling from
    17  // Go to C does not support varargs functions.
    18  
    19  struct ret {
    20  	uintptr_t r;
    21  	uintptr_t err;
    22  };
    23  
    24  struct ret
    25  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)
    26  {
    27  	struct ret r;
    28  
    29  	errno = 0;
    30  	r.r = syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9);
    31  	r.err = errno;
    32  	return r;
    33  }
    34  
    35  uintptr_t
    36  gccgoRealSyscallNoError(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)
    37  {
    38  	return syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9);
    39  }