diff options
Diffstat (limited to 'scripts/lib/recipetool/create_kmod.py')
| -rw-r--r-- | scripts/lib/recipetool/create_kmod.py | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/scripts/lib/recipetool/create_kmod.py b/scripts/lib/recipetool/create_kmod.py new file mode 100644 index 0000000..fe39edb --- /dev/null +++ b/scripts/lib/recipetool/create_kmod.py @@ -0,0 +1,152 @@ +# Recipe creation tool - kernel module support plugin +# +# Copyright (C) 2016 Intel Corporation +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License version 2 as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +import re +import logging +from recipetool.create import RecipeHandler, read_pkgconfig_provides, validate_pv + +logger = logging.getLogger('recipetool') + +tinfoil = None + +def tinfoil_init(instance): + global tinfoil + tinfoil = instance + + +class KernelModuleRecipeHandler(RecipeHandler): + def process(self, srctree, classes, lines_before, lines_after, handled, extravalues): + import bb.process + if 'buildsystem' in handled: + return False + + module_inc_re = re.compile(r'^#include\s+<linux/module.h>$') + makefiles = [] + is_module = False + + makefiles = [] + + files = RecipeHandler.checkfiles(srctree, ['*.c', '*.h'], recursive=True) + if files: + for cfile in files: + # Look in same dir or parent for Makefile + for makefile in [os.path.join(os.path.dirname(cfile), 'Makefile'), os.path.join(os.path.dirname(os.path.dirname(cfile)), 'Makefile')]: + if makefile in makefiles: + break + else: + if os.path.exists(makefile): + makefiles.append(makefile) + break + else: + continue + with open(cfile, 'r') as f: + for line in f: + if module_inc_re.match(line.strip()): + is_module = True + break + if is_module: + break + + if is_module: + classes.append('module') + handled.append('buildsystem') + # module.bbclass and the classes it inherits do most of the hard + # work, but we need to tweak it slightly depending on what the + # Makefile does (and there is a range of those) + # Check the makefile for the appropriate install target + install_lines = [] + compile_lines = [] + in_install = False + in_compile = False + install_target = None + with open(makefile, 'r') as f: + for line in f: + if line.startswith('install:'): + if not install_lines: + in_install = True + install_target = 'install' + elif line.startswith('modules_install:'): + install_lines = [] + in_install = True + install_target = 'modules_install' + elif line.startswith('modules:'): + compile_lines = [] + in_compile = True + elif line.startswith(('all:', 'default:')): + if not compile_lines: + in_compile = True + elif line: + if line[0] == '\t': + if in_install: + install_lines.append(line) + elif in_compile: + compile_lines.append(line) + elif ':' in line: + in_install = False + in_compile = False + + def check_target(lines, install): + kdirpath = '' + manual_install = False + for line in lines: + splitline = line.split() + if splitline[0] in ['make', 'gmake', '$(MAKE)']: + if '-C' in splitline: + idx = splitline.index('-C') + 1 + if idx < len(splitline): + kdirpath = splitline[idx] + break + elif install and splitline[0] == 'install': + if '.ko' in line: + manual_install = True + return kdirpath, manual_install + + kdirpath = None + manual_install = False + if install_lines: + kdirpath, manual_install = check_target(install_lines, install=True) + if compile_lines and not kdirpath: + kdirpath, _ = check_target(compile_lines, install=False) + + if manual_install or not install_lines: + lines_after.append('EXTRA_OEMAKE_append_task-install = " -C ${STAGING_KERNEL_DIR} M=${S}"') + elif install_target and install_target != 'modules_install': + lines_after.append('MODULES_INSTALL_TARGET = "install"') + + warnmsg = None + kdirvar = None + if kdirpath: + res = re.match(r'\$\(([^$)]+)\)', kdirpath) + if res: + kdirvar = res.group(1) + if kdirvar != 'KERNEL_SRC': + lines_after.append('EXTRA_OEMAKE += "%s=${STAGING_KERNEL_DIR}"' % kdirvar) + elif kdirpath.startswith('/lib/'): + warnmsg = 'Kernel path in install makefile is hardcoded - you will need to patch the makefile' + if not kdirvar and not warnmsg: + warnmsg = 'Unable to find means of passing kernel path into install makefile - if kernel path is hardcoded you will need to patch the makefile' + if warnmsg: + warnmsg += '. Note that the variable KERNEL_SRC will be passed in as the kernel source path.' + logger.warn(warnmsg) + lines_after.append('# %s' % warnmsg) + + return True + + return False + +def register_recipe_handlers(handlers): + handlers.append((KernelModuleRecipeHandler(), 15)) |