59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* \brief Platform-specific helper functions for the _main() function
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \date 2009-12-28
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*/
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/*
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* Copyright (C) 2009-2012 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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#ifndef _PLATFORM___MAIN_HELPER_H_
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#define _PLATFORM___MAIN_HELPER_H_
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#include <nova/syscalls.h>
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/**
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* Location of the main thread's UTCB, initialized by the startup code
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*/
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extern Nova::mword_t __main_thread_utcb;
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/**
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* Initial value of esp register, saved by the crt0 startup code
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*
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* This value contains the address of the hypervisor information page.
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*/
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extern long __initial_sp;
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/**
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* First available capability selector for custom use
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*/
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extern int __first_free_cap_selector;
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/**
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* Selector of local protection domain
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*/
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extern int __local_pd_sel;
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static void main_thread_bootstrap()
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{
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/* register UTCB of main thread */
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__main_thread_utcb = __initial_sp - Nova::PAGE_SIZE_BYTE;
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/* register start of usable capability range */
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enum { FIRST_FREE_PORTAL = 0x1000 };
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/* this variable may be set by the dynamic linker (ldso) */
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if (!__first_free_cap_selector)
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__first_free_cap_selector = FIRST_FREE_PORTAL;
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/* register pd selector at cap allocator */
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__local_pd_sel = Nova::PD_SEL;
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}
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#endif /* _PLATFORM___MAIN_HELPER_H_ */
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