8a9f2a6bbd
Compiling with LTO revealed a number of cases in the runtime and
standard library where C and Go disagreed about the type of an object or
function (or where Go and code generated by the compiler disagreed). In
all cases the underlying representation was the same (e.g., uintptr vs.
void*), so this wasn't causing actual problems, but it did result in a
number of annoying warnings when compiling with LTO.
Reviewed-on: https://go-review.googlesource.com/c/160700
From-SVN: r268923
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
/* go-varargs.c -- functions for calling C varargs functions.
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Copyright 2013 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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#include "config.h"
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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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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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/* The syscall package calls C functions. The Go compiler can not
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represent a C varargs functions. On some systems it's important
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that the declaration of a function match the call. This function
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holds non-varargs C functions that the Go code can call. */
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int
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__go_open (char *path, int mode, mode_t perm)
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{
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return open (path, mode, perm);
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}
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int
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__go_fcntl (int fd, int cmd, int arg)
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{
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return fcntl (fd, cmd, arg);
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}
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int
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__go_fcntl_flock (int fd, int cmd, struct flock *arg)
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{
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return fcntl (fd, cmd, arg);
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}
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// This is for the net package. We use uintptr_t to make sure that
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// the types match, since the Go and C "int" types are not the same.
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struct go_fcntl_ret {
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uintptr_t r;
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uintptr_t err;
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};
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struct go_fcntl_ret
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__go_fcntl_uintptr (uintptr_t fd, uintptr_t cmd, uintptr_t arg)
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{
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int r;
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struct go_fcntl_ret ret;
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r = fcntl ((int) fd, (int) cmd, (int) arg);
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ret.r = (uintptr_t) r;
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if (r < 0)
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ret.err = (uintptr_t) errno;
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else
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ret.err = 0;
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return ret;
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}
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int
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__go_ioctl (int d, int request, int arg)
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{
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return ioctl (d, request, arg);
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}
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int
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__go_ioctl_ptr (int d, int request, void *arg)
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{
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return ioctl (d, request, arg);
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}
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#ifdef HAVE_OPEN64
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int
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__go_open64 (char *path, int mode, mode_t perm)
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{
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return open64 (path, mode, perm);
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}
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#endif
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#ifdef HAVE_OPENAT
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int
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__go_openat (int fd, char *path, int flags, mode_t mode)
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{
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return openat (fd, path, flags, mode);
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}
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#endif
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// __go_syscall6 is called by both the runtime and syscall packages.
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// We use uintptr_t to make sure that the types match, since the Go
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// and C "int" types are not the same.
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uintptr_t
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__go_syscall6(uintptr_t flag, uintptr_t a1, uintptr_t a2, uintptr_t a3,
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uintptr_t a4, uintptr_t a5, uintptr_t a6)
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{
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return syscall (flag, a1, a2, a3, a4, a5, a6);
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}
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