97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
/*
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* \brief Thread bootstrap code
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* \author Christian Prochaska
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* \author Martin Stein
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* \date 2013-02-15
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*/
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/*
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* Copyright (C) 2013 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 General Public License version 2.
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*/
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/* Genode includes */
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#include <base/thread.h>
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#include <base/env.h>
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#include <util/string.h>
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/* Codezero includes */
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#include <codezero/syscalls.h>
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Genode::Native_thread_id main_thread_tid;
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Codezero::l4_mutex main_thread_running_lock;
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/*****************************
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** Startup library support **
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*****************************/
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void prepare_init_main_thread()
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{
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/* initialize codezero environment */
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Codezero::__l4_init();
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/* provide kernel identification of thread through temporary environment */
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main_thread_tid = Codezero::thread_myself();
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}
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void prepare_reinit_main_thread() { prepare_init_main_thread(); }
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/****************************
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** Codezero libl4 support **
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****************************/
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/*
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* Unfortunately, the function 'exregs_print_registers' in 'exregs.c' refers to
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* 'memset'. Because we do not want to link core against a C library, we have to
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* resolve this function here.
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*/
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extern "C" void *memset(void *s, int c, Genode::size_t n) __attribute__((weak));
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extern "C" void *memset(void *s, int c, Genode::size_t n)
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{
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return Genode::memset(s, c, n);
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}
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/*
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* Same problem as for 'memset'. The 'printf' symbol is referenced from
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* 'mutex.c' and 'exregs.c' of Codezero's libl4.
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*/
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extern "C" int printf(const char *format, ...) __attribute__((weak));
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extern "C" int printf(const char *format, ...)
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{
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va_list list;
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va_start(list, format);
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Genode::vprintf(format, list);
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va_end(list);
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return 0;
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}
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/*****************
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** Thread_base **
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*****************/
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void Genode::Thread_base::_thread_bootstrap()
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{
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Codezero::l4_mutex_init(utcb()->running_lock());
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Codezero::l4_mutex_lock(utcb()->running_lock()); /* block on first mutex lock */
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}
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void Genode::Thread_base::_init_platform_thread(size_t, Type type)
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{
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if (type == NORMAL) { return; }
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/* adjust values whose computation differs for a main thread */
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_tid.l4id = main_thread_tid;
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_thread_cap = Genode::env()->parent()->main_thread_cap();
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/* get first mutex lock (normally done by _thread_bootstrap) */
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Codezero::l4_mutex_init(utcb()->running_lock());
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Codezero::l4_mutex_lock(utcb()->running_lock());
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}
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