0fd53c7fe4
There are lots of places where a numeric argument of an argument string gets extraced as signed long value and then assigned to an unsigned long variable. If the value in the string was negative, it would not be detected as invalid (and replaced by the default value), but become a positive bogus value. With this patch, numeric values which are supposed to be unsigned get extracted with the 'ulong_value()' function, which returns the default value for negative numbers. Fixes #1472
97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
/*
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* \brief Signal root interface on HW-core
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* \author Martin Stein
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* \date 2012-05-06
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*/
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/*
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* Copyright (C) 2012-2013 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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#ifndef _CORE__INCLUDE__SIGNAL_ROOT_H_
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#define _CORE__INCLUDE__SIGNAL_ROOT_H_
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/* Genode includes */
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#include <root/component.h>
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/* base-hw includes */
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#include <kernel/core_interface.h>
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/* core includes */
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#include <signal_session_component.h>
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namespace Genode
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{
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/**
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* Provide EP to signal root before it initialises root component
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*/
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class Signal_handler
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{
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enum { STACK_SIZE = 4096 };
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Rpc_entrypoint _entrypoint;
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public:
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/**
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* Constructor
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*/
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Signal_handler(Cap_session * const c)
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: _entrypoint(c, STACK_SIZE, "signal") { }
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/***************
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** Accessors **
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***************/
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Rpc_entrypoint * entrypoint() { return &_entrypoint; }
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};
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/**
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* Provides signal service by managing appropriate sessions to the clients
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*/
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class Signal_root : private Signal_handler,
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public Root_component<Signal_session_component>
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{
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public:
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/**
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* Constructor
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*
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* \param md Meta-data allocator to be used by root component
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* \param c CAP session to be used by the root entrypoint
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*/
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Signal_root(Allocator * const md, Cap_session * const c) :
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Signal_handler(c),
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Root_component<Signal_session_component>(entrypoint(), md)
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{ }
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protected:
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/********************************
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** 'Root_component' interface **
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********************************/
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Signal_session_component * _create_session(const char * args)
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{
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size_t ram_quota =
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Arg_string::find_arg(args, "ram_quota").ulong_value(0);
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return new (md_alloc())
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Signal_session_component(md_alloc(), ram_quota);
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}
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void _upgrade_session(Signal_session_component *s,
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const char * args)
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{
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size_t ram_quota =
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Arg_string::find_arg(args, "ram_quota").ulong_value(0);
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s->upgrade_ram_quota(ram_quota);
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}
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};
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}
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#endif /* _CORE__INCLUDE__SIGNAL_ROOT_H_ */
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