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# Recipe creation tool - kernel module support plugin
#
# Copyright (C) 2016 Intel Corporation
#
# SPDX-License-Identifier: GPL-2.0-only
#
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>$')
makefiles = []
is_module = False
makefiles = []
files = RecipeHandler.checkfiles(srctree, ['*.c', '*.h'], recursive=True, excludedirs=['contrib', 'test', 'examples'])
if files:
for cfile in files:
# Look in same dir or parent for Makefile
for makefile in [os.path.join(os.path.dirname(cfile), 'Makefile'), os.path.join(os.path.dirname(os.path.dirname(cfile)), 'Makefile')]:
if makefile in makefiles:
break
else:
if os.path.exists(makefile):
makefiles.append(makefile)
break
else:
continue
with open(cfile, 'r', errors='surrogateescape') as f:
for line in f:
if module_inc_re.match(line.strip()):
is_module = True
break
if is_module:
break
if is_module:
classes.append('module')
handled.append('buildsystem')
# module.bbclass and the classes it inherits do most of the hard
# work, but we need to tweak it slightly depending on what the
# Makefile does (and there is a range of those)
# Check the makefile for the appropriate install target
install_lines = []
compile_lines = []
in_install = False
in_compile = False
install_target = None
with open(makefile, 'r', errors='surrogateescape') as f:
for line in f:
if line.startswith('install:'):
if not install_lines:
in_install = True
install_target = 'install'
elif line.startswith('modules_install:'):
install_lines = []
in_install = True
install_target = 'modules_install'
elif line.startswith('modules:'):
compile_lines = []
in_compile = True
elif line.startswith(('all:', 'default:')):
if not compile_lines:
in_compile = True
elif line:
if line[0] == '\t':
if in_install:
install_lines.append(line)
elif in_compile:
compile_lines.append(line)
elif ':' in line:
in_install = False
in_compile = False
def check_target(lines, install):
kdirpath = ''
manual_install = False
for line in lines:
splitline = line.split()
if splitline[0] in ['make', 'gmake', '$(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.warning(warnmsg)
lines_after.append('# %s' % warnmsg)
return True
return False
def register_recipe_handlers(handlers):
handlers.append((KernelModuleRecipeHandler(), 15))
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