zircon/vdso/debuglog.fidl

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library zx;

[Transport = "Syscall"]
protocol debuglog {
    // TODO(fxbug.dev/32803): handle == ZX_HANDLE_INVALID accepted.
    /// Create an object allowing access to the kernel debuglog.
    ///
    /// Rights: resource must have resource kind ZX_RSRC_KIND_ROOT.
    debuglog_create(handle:RESOURCE resource, uint32 options)
        -> (status status, handle:LOG out);

    /// Write a message to the kernel debuglog.
    ///
    /// Rights: handle must be of type ZX_OBJ_TYPE_LOG and have ZX_RIGHT_WRITE.
    debuglog_write(handle:LOG handle, uint32 options, vector_void buffer) -> (status status);

    /// Read a single log record from the kernel debuglog.
    ///
    /// Rights: handle must be of type ZX_OBJ_TYPE_LOG and have ZX_RIGHT_READ.
    debuglog_read(handle:LOG handle, uint32 options) -> (status status, vector_void buffer);
};