mirror of
https://github.com/mmueller41/genode.git
synced 2026-01-22 04:52:56 +01:00
de69ee2e66
This patch simplifies the system call bindings. The common syscall bindings in 'src/platform/' have been reduced to the syscalls needed by non-core programs. The additional syscalls that are needed solely by core have been moved to 'src/core/include/core_linux_syscalls.h'. Furthermore, the resource path is not used outside of core anymore. Hence, we could get rid of the rpath library. The resource-path code has been moved to 'src/core/include/resource_path.h'. The IPC-related parts of 'src/platform' have been moved to the IPC library. So there is now a clean separation between low-level syscall bindings (in 'src/platform') and higher-level code. The code for the socket-descriptor registry is now located in the 'src/base/ipc/socket_descriptor_registry.h' header. The interface is separated from 'ipc.cc' because core needs to access the registry from outside the ipc library.
85 lines
2.0 KiB
C++
85 lines
2.0 KiB
C++
/*
|
|
* \brief Linux-specific core implementation of the ROM session interface
|
|
* \author Norman Feske
|
|
* \date 2006-07-06
|
|
*
|
|
* The Linux version of ROM session component does not use the
|
|
* Rom_fs as provided as constructor argument. Instead, we map
|
|
* rom modules directly to files of the host file system.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2012 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* Linux includes */
|
|
#include <core_linux_syscalls.h>
|
|
#include <sys/fcntl.h>
|
|
|
|
/* Genode includes */
|
|
#include <linux_dataspace/linux_dataspace.h>
|
|
#include <util/arg_string.h>
|
|
#include <root/root.h>
|
|
|
|
/* local includes */
|
|
#include "rom_session_component.h"
|
|
|
|
using namespace Genode;
|
|
|
|
|
|
static Genode::size_t file_size(const char *path)
|
|
{
|
|
struct stat64 s;
|
|
if (lx_stat(path, &s) < 0)
|
|
return 0;
|
|
else
|
|
return s.st_size;
|
|
}
|
|
|
|
|
|
Rom_session_component::Rom_session_component(Rom_fs *rom_fs,
|
|
Rpc_entrypoint *ds_ep,
|
|
const char *args)
|
|
: _ds_ep(ds_ep)
|
|
{
|
|
/* extract filename from session arguments */
|
|
char fname[Linux_dataspace::FNAME_LEN];
|
|
Arg_string::find_arg(args, "filename").string(fname, sizeof(fname), "");
|
|
|
|
/* only files inside the current working directory are allowed */
|
|
for (const char *c = fname; *c; c++)
|
|
if (*c == '/')
|
|
throw Root::Invalid_args();
|
|
|
|
Genode::size_t const fsize = file_size(fname);
|
|
|
|
/* use invalid capability as default value */
|
|
_ds_cap = Rom_dataspace_capability();
|
|
|
|
/* ROM module not found */
|
|
if (fsize == 0)
|
|
throw Root::Invalid_args();
|
|
|
|
int const fd = lx_open(fname, O_RDONLY | LX_O_CLOEXEC, S_IRUSR | S_IXUSR);
|
|
|
|
_ds = Dataspace_component(fsize, 0, false, false, 0);
|
|
_ds.fd(fd);
|
|
_ds.fname(fname);
|
|
|
|
Dataspace_capability ds_cap = _ds_ep->manage(&_ds);
|
|
_ds_cap = static_cap_cast<Rom_dataspace>(ds_cap);
|
|
}
|
|
|
|
|
|
Rom_session_component::~Rom_session_component()
|
|
{
|
|
_ds_ep->dissolve(&_ds);
|
|
|
|
int const fd = _ds.fd().dst().socket;
|
|
if (fd != -1)
|
|
lx_close(fd);
|
|
}
|