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40a5af42eb
This patch moves the base library from src/base to src/lib/base, flattens the library-internal directory structure, and moves the common parts of the library-description files to base/lib/mk/base.inc and base/lib/mk/base-common.inc. Furthermore, the patch fixes a few cosmetic issues (whitespace and comments only) that I encountered while browsing the result. Fixes #1952
115 lines
3.2 KiB
C++
115 lines
3.2 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/child.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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/*
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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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Child::Process::Initial_thread::Initial_thread(Cpu_session &cpu,
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Pd_session_capability pd,
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char const *name)
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:
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cpu(cpu),
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cap(cpu.create_thread(pd, Cpu_session::DEFAULT_WEIGHT, name))
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{ }
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Child::Process::Initial_thread::~Initial_thread() { }
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/*
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* On Linux, the ELF loading is performed by the kernel
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*/
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Child::Process::Loaded_executable::Loaded_executable(Dataspace_capability,
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Dataspace_capability,
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Ram_session &,
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Region_map &,
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Region_map &,
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Parent_capability) { }
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Child::Process::Process(Dataspace_capability elf_ds,
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Dataspace_capability ldso_ds,
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Pd_session_capability pd_cap,
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Pd_session &pd,
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Ram_session &ram,
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Cpu_session &cpu,
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Region_map &local_rm,
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Region_map &remote_rm,
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Parent_capability parent_cap,
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char const *name)
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:
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initial_thread(cpu, pd_cap, name),
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loaded_executable(elf_ds, ldso_ds, ram, local_rm, remote_rm, parent_cap)
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{
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/* skip loading when called during fork */
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if (!elf_ds.valid())
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return;
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/* attach ELF locally */
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addr_t elf_addr;
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try { elf_addr = local_rm.attach(elf_ds); }
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catch (Region_map::Attach_failed) {
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PERR("local attach of ELF executable failed"); throw; }
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/* setup ELF object and read program entry pointer */
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Elf_binary elf(elf_addr);
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if (!elf.valid())
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throw Invalid_executable();
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bool const dynamically_linked = elf.is_dynamically_linked();
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local_rm.detach(elf_addr);
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/*
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* If the specified executable is a dynamically linked program, we load
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* the dynamic linker instead.
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*/
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if (dynamically_linked) {
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if (!ldso_ds.valid()) {
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PERR("attempt to start dynamic executable without dynamic linker");
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throw Missing_dynamic_linker();
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}
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elf_ds = ldso_ds;
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}
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pd.assign_parent(parent_cap);
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Linux_native_pd_client
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lx_pd(static_cap_cast<Linux_native_pd>(pd.native_pd()));
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lx_pd.start(elf_ds);
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}
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Child::Process::~Process() { }
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