[oe-commits] [openembedded-core] 03/12: recipetool: create: add support for out-of-tree kernel modules
git at git.openembedded.org
git at git.openembedded.org
Wed Mar 2 22:40:19 UTC 2016
rpurdie pushed a commit to branch master-next
in repository openembedded-core.
commit 8a8087a932c3eaaca34491934f8737fb247a1f1b
Author: Paul Eggleton <paul.eggleton at linux.intel.com>
AuthorDate: Tue Mar 1 00:48:24 2016 +1300
recipetool: create: add support for out-of-tree kernel modules
Detect kernel modules by looking for #include <linux/module.h>, and
handle the various styles of Makefile that appear to be used. I was able
to use this code to successfully build a number of external kernel
modules I found.
Implements [YOCTO #8982].
Signed-off-by: Paul Eggleton <paul.eggleton at linux.intel.com>
Signed-off-by: Ross Burton <ross.burton at intel.com>
---
scripts/lib/recipetool/create_kmod.py | 152 ++++++++++++++++++++++++++++++++++
1 file changed, 152 insertions(+)
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))
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