96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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* \brief Implementation of process creation for Linux
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* \author Norman Feske
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* \date 2006-07-06
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*/
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/*
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* Copyright (C) 2006-2013 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/env.h>
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#include <base/process.h>
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#include <base/printf.h>
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#include <linux_native_pd/client.h>
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/* base-internal includes */
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#include <linux_syscalls.h>
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#include <base/internal/elf.h>
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using namespace Genode;
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Dataspace_capability Process::_dynamic_linker_cap;
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/**
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* Check for dynamic ELF header
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*/
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static bool _check_dynamic_elf(Dataspace_capability elf_ds_cap)
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{
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/* attach ELF locally */
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addr_t elf_addr;
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try { elf_addr = env()->rm_session()->attach(elf_ds_cap); }
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catch (...) { return false; }
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/*
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* If attach is called within core, it will return zero because
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* Linux uses Core_rm_session.
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*/
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if (!elf_addr) return false;
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/* read program header and interpreter */
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Elf_binary elf((addr_t)elf_addr);
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env()->rm_session()->detach((void *)elf_addr);
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return elf.is_dynamically_linked();
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}
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Process::Process(Dataspace_capability elf_data_ds_cap,
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Pd_session_capability pd_session_cap,
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Ram_session_capability ram_session_cap,
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Cpu_session_capability cpu_session_cap,
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Rm_session_capability rm_session_cap,
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Parent_capability parent_cap,
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char const *name)
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:
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_pd_session_client(pd_session_cap),
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_cpu_session_client(cpu_session_cap),
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_rm_session_client(Rm_session_capability())
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{
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/* check for dynamic program header */
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if (_check_dynamic_elf(elf_data_ds_cap)) {
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if (!_dynamic_linker_cap.valid()) {
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PERR("Dynamically linked file found, "
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"but no dynamic linker binary present");
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return;
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}
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elf_data_ds_cap = _dynamic_linker_cap;
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}
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/*
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* Register main thread at core
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*
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* At this point in time, we do not yet know the TID and PID of the new
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* thread. Those information will be provided to core by the constructor of
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* the 'Platform_env' of the new process.
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*/
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enum { WEIGHT = Cpu_session::DEFAULT_WEIGHT };
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_thread0_cap = _cpu_session_client.create_thread(WEIGHT, name);
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Linux_native_pd_client
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lx_pd(static_cap_cast<Linux_native_pd>(_pd_session_client.native_pd()));
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_pd_session_client.assign_parent(parent_cap);
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lx_pd.start(elf_data_ds_cap);
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}
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Process::~Process() { }
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