118 lines
3.2 KiB
C++
118 lines
3.2 KiB
C++
/*
|
|
* \brief Implementation of process creation for Linux
|
|
* \author Norman Feske
|
|
* \date 2006-07-06
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/env.h>
|
|
#include <base/child.h>
|
|
#include <base/log.h>
|
|
#include <linux_native_pd/client.h>
|
|
|
|
/* base-internal includes */
|
|
#include <linux_syscalls.h>
|
|
#include <base/internal/elf.h>
|
|
|
|
|
|
using namespace Genode;
|
|
|
|
|
|
/*
|
|
* Register main thread at core
|
|
*
|
|
* At this point in time, we do not yet know the TID and PID of the new
|
|
* thread. Those information will be provided to core by the constructor of
|
|
* the 'Platform_env' of the new process.
|
|
*/
|
|
Child::Initial_thread::Initial_thread(Cpu_session &cpu,
|
|
Pd_session_capability pd,
|
|
Name const &name)
|
|
:
|
|
_cpu(cpu),
|
|
_cap(cpu.create_thread(pd, name, Affinity::Location(), Cpu_session::Weight()))
|
|
{ }
|
|
|
|
|
|
Child::Initial_thread::~Initial_thread() { }
|
|
|
|
|
|
void Child::Initial_thread::start(addr_t) { }
|
|
|
|
|
|
/*
|
|
* On Linux, the ELF loading is performed by the kernel
|
|
*/
|
|
Child::Process::Loaded_executable::Loaded_executable(Dataspace_capability,
|
|
Dataspace_capability,
|
|
Ram_session &,
|
|
Region_map &,
|
|
Region_map &,
|
|
Parent_capability) { }
|
|
|
|
|
|
Child::Process::Process(Dataspace_capability elf_ds,
|
|
Dataspace_capability ldso_ds,
|
|
Pd_session_capability pd_cap,
|
|
Pd_session &pd,
|
|
Ram_session &ram,
|
|
Initial_thread_base &,
|
|
Region_map &local_rm,
|
|
Region_map &remote_rm,
|
|
Parent_capability parent_cap)
|
|
:
|
|
loaded_executable(elf_ds, ldso_ds, ram, local_rm, remote_rm, parent_cap)
|
|
{
|
|
/* skip loading when called during fork */
|
|
if (!elf_ds.valid())
|
|
return;
|
|
|
|
/* attach ELF locally */
|
|
addr_t elf_addr;
|
|
try { elf_addr = local_rm.attach(elf_ds); }
|
|
catch (Region_map::Invalid_dataspace) {
|
|
error("local attach of ELF executable failed (Invalid_dataspace)"); throw; }
|
|
catch (Region_map::Region_conflict) {
|
|
error("local attach of ELF executable failed (Region_conflict)"); throw; }
|
|
|
|
/* setup ELF object and read program entry pointer */
|
|
Elf_binary elf(elf_addr);
|
|
if (!elf.valid())
|
|
throw Invalid_executable();
|
|
|
|
bool const dynamically_linked = elf.dynamically_linked();
|
|
|
|
local_rm.detach(elf_addr);
|
|
|
|
/*
|
|
* If the specified executable is a dynamically linked program, we load
|
|
* the dynamic linker instead.
|
|
*/
|
|
if (dynamically_linked) {
|
|
|
|
if (!ldso_ds.valid()) {
|
|
error("attempt to start dynamic executable without dynamic linker");
|
|
throw Missing_dynamic_linker();
|
|
}
|
|
|
|
elf_ds = ldso_ds;
|
|
}
|
|
|
|
pd.assign_parent(parent_cap);
|
|
|
|
Linux_native_pd_client
|
|
lx_pd(static_cap_cast<Linux_native_pd>(pd.native_pd()));
|
|
|
|
lx_pd.start(elf_ds);
|
|
}
|
|
|
|
|
|
Child::Process::~Process() { }
|