53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
/*
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* \brief Kernel backend for core log messages
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* \author Norman Feske
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* \author Stefan Kalkowski
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* \date 2016-10-10
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*/
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/*
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* Copyright (C) 2016-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#include <core_log.h>
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static Genode::Core_log_range range { 0, 0 };
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static unsigned range_pos { 0 };
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static void out_mem(char const c)
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{
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struct Log_memory
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{
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struct Header { unsigned value; } pos;
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char data[1];
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unsigned out(char const c, unsigned cur_pos,
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Genode::Core_log_range const &range)
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{
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pos.value = cur_pos;
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data[cur_pos++] = c;
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return cur_pos % (range.size - sizeof(Log_memory::Header));
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}
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} __attribute__((packed)) * mem = reinterpret_cast<Log_memory *>(range.start);
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if (!mem)
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return;
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range_pos = mem->out(c, range_pos, range);
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}
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void Genode::init_core_log(Core_log_range const &r) { range = r; }
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void Genode::Core_log::output(char const * str)
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{
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for (unsigned i = 0; i < Genode::strlen(str); i++) {
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out(str[i]);
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out_mem(str[i]);
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}
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}
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