1// Copyright 2016 The Fuchsia Authors 2// Copyright (c) 2008-2015 Travis Geiselbrecht 3// 4// Use of this source code is governed by a MIT-style 5// license that can be found in the LICENSE file or at 6// https://opensource.org/licenses/MIT 7 8#pragma once 9 10#include <list.h> 11#include <sys/types.h> 12#include <zircon/compiler.h> 13 14/* LK specific calls to register to get input/output of the main console */ 15 16__BEGIN_CDECLS 17 18typedef struct __print_callback print_callback_t; 19struct __print_callback { 20 struct list_node entry; 21 void (*print)(print_callback_t* cb, const char* str, size_t len); 22 void* context; 23}; 24 25/* register callback to receive debug prints */ 26void register_print_callback(print_callback_t* cb); 27void unregister_print_callback(print_callback_t* cb); 28 29/* back doors to directly write to the kernel serial and console */ 30void __kernel_serial_write(const char* str, size_t len); 31void __kernel_console_write(const char* str, size_t len); 32 33/* path from printf() to kernel debug output */ 34int __printf_output_func(const char* s, size_t len, void* state); 35 36__END_CDECLS 37