Merge tag 'modsign-pkcs7-20150814' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into ra-next
This commit is contained in:
James Morris
James Morris
commit
f062bcaa25
@ -92,13 +92,13 @@ This has a number of options available:
|
||||
(4) "File name or PKCS#11 URI of module signing key" (CONFIG_MODULE_SIG_KEY)
|
||||
|
||||
Setting this option to something other than its default of
|
||||
"signing_key.pem" will disable the autogeneration of signing keys and
|
||||
allow the kernel modules to be signed with a key of your choosing.
|
||||
The string provided should identify a file containing both a private
|
||||
key and its corresponding X.509 certificate in PEM form, or — on
|
||||
systems where the OpenSSL ENGINE_pkcs11 is functional — a PKCS#11 URI
|
||||
as defined by RFC7512. In the latter case, the PKCS#11 URI should
|
||||
reference both a certificate and a private key.
|
||||
"certs/signing_key.pem" will disable the autogeneration of signing keys
|
||||
and allow the kernel modules to be signed with a key of your choosing.
|
||||
The string provided should identify a file containing both a private key
|
||||
and its corresponding X.509 certificate in PEM form, or — on systems where
|
||||
the OpenSSL ENGINE_pkcs11 is functional — a PKCS#11 URI as defined by
|
||||
RFC7512. In the latter case, the PKCS#11 URI should reference both a
|
||||
certificate and a private key.
|
||||
|
||||
If the PEM file containing the private key is encrypted, or if the
|
||||
PKCS#11 token requries a PIN, this can be provided at build time by
|
||||
@ -130,12 +130,12 @@ Under normal conditions, when CONFIG_MODULE_SIG_KEY is unchanged from its
|
||||
default, the kernel build will automatically generate a new keypair using
|
||||
openssl if one does not exist in the file:
|
||||
|
||||
signing_key.pem
|
||||
certs/signing_key.pem
|
||||
|
||||
during the building of vmlinux (the public part of the key needs to be built
|
||||
into vmlinux) using parameters in the:
|
||||
|
||||
x509.genkey
|
||||
certs/x509.genkey
|
||||
|
||||
file (which is also generated if it does not already exist).
|
||||
|
||||
|
||||
@ -2589,6 +2589,15 @@ S: Supported
|
||||
F: Documentation/filesystems/ceph.txt
|
||||
F: fs/ceph/
|
||||
|
||||
CERTIFICATE HANDLING:
|
||||
M: David Howells <dhowells@redhat.com>
|
||||
M: David Woodhouse <dwmw2@infradead.org>
|
||||
L: keyrings@linux-nfs.org
|
||||
S: Maintained
|
||||
F: Documentation/module-signing.txt
|
||||
F: certs/
|
||||
F: scripts/extract-cert.c
|
||||
|
||||
CERTIFIED WIRELESS USB (WUSB) SUBSYSTEM:
|
||||
L: linux-usb@vger.kernel.org
|
||||
S: Orphan
|
||||
|
||||
9
Makefile
9
Makefile
@ -870,10 +870,9 @@ INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
|
||||
# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
|
||||
|
||||
ifdef CONFIG_MODULE_SIG_ALL
|
||||
MODSECKEY = $(CONFIG_MODULE_SIG_KEY)
|
||||
MODPUBKEY = ./signing_key.x509
|
||||
export MODPUBKEY
|
||||
mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
|
||||
$(eval $(call config_filename,MODULE_SIG_KEY))
|
||||
|
||||
mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
|
||||
else
|
||||
mod_sign_cmd = true
|
||||
endif
|
||||
@ -881,7 +880,7 @@ export mod_sign_cmd
|
||||
|
||||
|
||||
ifeq ($(KBUILD_EXTMOD),)
|
||||
core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
|
||||
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
|
||||
|
||||
vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
|
||||
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
|
||||
|
||||
42
certs/Kconfig
Normal file
42
certs/Kconfig
Normal file
@ -0,0 +1,42 @@
|
||||
menu "Certificates for signature checking"
|
||||
|
||||
config MODULE_SIG_KEY
|
||||
string "File name or PKCS#11 URI of module signing key"
|
||||
default "certs/signing_key.pem"
|
||||
depends on MODULE_SIG
|
||||
help
|
||||
Provide the file name of a private key/certificate in PEM format,
|
||||
or a PKCS#11 URI according to RFC7512. The file should contain, or
|
||||
the URI should identify, both the certificate and its corresponding
|
||||
private key.
|
||||
|
||||
If this option is unchanged from its default "certs/signing_key.pem",
|
||||
then the kernel will automatically generate the private key and
|
||||
certificate as described in Documentation/module-signing.txt
|
||||
|
||||
config SYSTEM_TRUSTED_KEYRING
|
||||
bool "Provide system-wide ring of trusted keys"
|
||||
depends on KEYS
|
||||
help
|
||||
Provide a system keyring to which trusted keys can be added. Keys in
|
||||
the keyring are considered to be trusted. Keys may be added at will
|
||||
by the kernel from compiled-in data and from hardware key stores, but
|
||||
userspace may only add extra keys if those keys can be verified by
|
||||
keys already in the keyring.
|
||||
|
||||
Keys in this keyring are used by module signature checking.
|
||||
|
||||
config SYSTEM_TRUSTED_KEYS
|
||||
string "Additional X.509 keys for default system keyring"
|
||||
depends on SYSTEM_TRUSTED_KEYRING
|
||||
help
|
||||
If set, this option should be the filename of a PEM-formatted file
|
||||
containing trusted X.509 certificates to be included in the default
|
||||
system keyring. Any certificate used for module signing is implicitly
|
||||
also trusted.
|
||||
|
||||
NOTE: If you previously provided keys for the system keyring in the
|
||||
form of DER-encoded *.x509 files in the top-level build directory,
|
||||
those are no longer used. You will need to set this option instead.
|
||||
|
||||
endmenu
|
||||
94
certs/Makefile
Normal file
94
certs/Makefile
Normal file
@ -0,0 +1,94 @@
|
||||
#
|
||||
# Makefile for the linux kernel signature checking certificates.
|
||||
#
|
||||
|
||||
obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
|
||||
|
||||
ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
|
||||
|
||||
$(eval $(call config_filename,SYSTEM_TRUSTED_KEYS))
|
||||
|
||||
# GCC doesn't include .incbin files in -MD generated dependencies (PR#66871)
|
||||
$(obj)/system_certificates.o: $(obj)/x509_certificate_list
|
||||
|
||||
# Cope with signing_key.x509 existing in $(srctree) not $(objtree)
|
||||
AFLAGS_system_certificates.o := -I$(srctree)
|
||||
|
||||
quiet_cmd_extract_certs = EXTRACT_CERTS $(patsubst "%",%,$(2))
|
||||
cmd_extract_certs = scripts/extract-cert $(2) $@ || ( rm $@; exit 1)
|
||||
|
||||
targets += x509_certificate_list
|
||||
$(obj)/x509_certificate_list: scripts/extract-cert $(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(SYSTEM_TRUSTED_KEYS_FILENAME) FORCE
|
||||
$(call if_changed,extract_certs,$(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_TRUSTED_KEYS))
|
||||
endif
|
||||
|
||||
clean-files := x509_certificate_list .x509.list
|
||||
|
||||
ifeq ($(CONFIG_MODULE_SIG),y)
|
||||
###############################################################################
|
||||
#
|
||||
# If module signing is requested, say by allyesconfig, but a key has not been
|
||||
# supplied, then one will need to be generated to make sure the build does not
|
||||
# fail and that the kernel may be used afterwards.
|
||||
#
|
||||
###############################################################################
|
||||
ifndef CONFIG_MODULE_SIG_HASH
|
||||
$(error Could not determine digest type to use from kernel config)
|
||||
endif
|
||||
|
||||
# We do it this way rather than having a boolean option for enabling an
|
||||
# external private key, because 'make randconfig' might enable such a
|
||||
# boolean option and we unfortunately can't make it depend on !RANDCONFIG.
|
||||
ifeq ($(CONFIG_MODULE_SIG_KEY),"certs/signing_key.pem")
|
||||
$(obj)/signing_key.pem: $(obj)/x509.genkey
|
||||
@echo "###"
|
||||
@echo "### Now generating an X.509 key pair to be used for signing modules."
|
||||
@echo "###"
|
||||
@echo "### If this takes a long time, you might wish to run rngd in the"
|
||||
@echo "### background to keep the supply of entropy topped up. It"
|
||||
@echo "### needs to be run as root, and uses a hardware random"
|
||||
@echo "### number generator if one is available."
|
||||
@echo "###"
|
||||
openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
|
||||
-batch -x509 -config $(obj)/x509.genkey \
|
||||
-outform PEM -out $(obj)/signing_key.pem \
|
||||
-keyout $(obj)/signing_key.pem 2>&1
|
||||
@echo "###"
|
||||
@echo "### Key pair generated."
|
||||
@echo "###"
|
||||
|
||||
$(obj)/x509.genkey:
|
||||
@echo Generating X.509 key generation config
|
||||
@echo >$@ "[ req ]"
|
||||
@echo >>$@ "default_bits = 4096"
|
||||
@echo >>$@ "distinguished_name = req_distinguished_name"
|
||||
@echo >>$@ "prompt = no"
|
||||
@echo >>$@ "string_mask = utf8only"
|
||||
@echo >>$@ "x509_extensions = myexts"
|
||||
@echo >>$@
|
||||
@echo >>$@ "[ req_distinguished_name ]"
|
||||
@echo >>$@ "#O = Unspecified company"
|
||||
@echo >>$@ "CN = Build time autogenerated kernel key"
|
||||
@echo >>$@ "#emailAddress = unspecified.user@unspecified.company"
|
||||
@echo >>$@
|
||||
@echo >>$@ "[ myexts ]"
|
||||
@echo >>$@ "basicConstraints=critical,CA:FALSE"
|
||||
@echo >>$@ "keyUsage=digitalSignature"
|
||||
@echo >>$@ "subjectKeyIdentifier=hash"
|
||||
@echo >>$@ "authorityKeyIdentifier=keyid"
|
||||
endif
|
||||
|
||||
$(eval $(call config_filename,MODULE_SIG_KEY))
|
||||
|
||||
# If CONFIG_MODULE_SIG_KEY isn't a PKCS#11 URI, depend on it
|
||||
ifeq ($(patsubst pkcs11:%,%,$(firstword $(MODULE_SIG_KEY_FILENAME))),$(firstword $(MODULE_SIG_KEY_FILENAME)))
|
||||
X509_DEP := $(MODULE_SIG_KEY_SRCPREFIX)$(MODULE_SIG_KEY_FILENAME)
|
||||
endif
|
||||
|
||||
# GCC PR#66871 again.
|
||||
$(obj)/system_certificates.o: $(obj)/signing_key.x509
|
||||
|
||||
targets += signing_key.x509
|
||||
$(obj)/signing_key.x509: scripts/extract-cert $(X509_DEP) FORCE
|
||||
$(call if_changed,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY))
|
||||
endif
|
||||
@ -8,9 +8,9 @@
|
||||
VMLINUX_SYMBOL(system_certificate_list):
|
||||
__cert_list_start:
|
||||
#ifdef CONFIG_MODULE_SIG
|
||||
.incbin "signing_key.x509"
|
||||
.incbin "certs/signing_key.x509"
|
||||
#endif
|
||||
.incbin "kernel/x509_certificate_list"
|
||||
.incbin "certs/x509_certificate_list"
|
||||
__cert_list_end:
|
||||
|
||||
.align 8
|
||||
@ -1601,5 +1601,6 @@ config CRYPTO_HASH_INFO
|
||||
|
||||
source "drivers/crypto/Kconfig"
|
||||
source crypto/asymmetric_keys/Kconfig
|
||||
source certs/Kconfig
|
||||
|
||||
endif # if CRYPTO
|
||||
|
||||
39
init/Kconfig
39
init/Kconfig
@ -1740,31 +1740,6 @@ config MMAP_ALLOW_UNINITIALIZED
|
||||
|
||||
See Documentation/nommu-mmap.txt for more information.
|
||||
|
||||
config SYSTEM_TRUSTED_KEYRING
|
||||
bool "Provide system-wide ring of trusted keys"
|
||||
depends on KEYS
|
||||
help
|
||||
Provide a system keyring to which trusted keys can be added. Keys in
|
||||
the keyring are considered to be trusted. Keys may be added at will
|
||||
by the kernel from compiled-in data and from hardware key stores, but
|
||||
userspace may only add extra keys if those keys can be verified by
|
||||
keys already in the keyring.
|
||||
|
||||
Keys in this keyring are used by module signature checking.
|
||||
|
||||
config SYSTEM_TRUSTED_KEYS
|
||||
string "Additional X.509 keys for default system keyring"
|
||||
depends on SYSTEM_TRUSTED_KEYRING
|
||||
help
|
||||
If set, this option should be the filename of a PEM-formatted file
|
||||
containing trusted X.509 certificates to be included in the default
|
||||
system keyring. Any certificate used for module signing is implicitly
|
||||
also trusted.
|
||||
|
||||
NOTE: If you previously provided keys for the system keyring in the
|
||||
form of DER-encoded *.x509 files in the top-level build directory,
|
||||
those are no longer used. You will need to set this option instead.
|
||||
|
||||
config SYSTEM_DATA_VERIFICATION
|
||||
def_bool n
|
||||
select SYSTEM_TRUSTED_KEYRING
|
||||
@ -1965,20 +1940,6 @@ config MODULE_SIG_HASH
|
||||
default "sha384" if MODULE_SIG_SHA384
|
||||
default "sha512" if MODULE_SIG_SHA512
|
||||
|
||||
config MODULE_SIG_KEY
|
||||
string "File name or PKCS#11 URI of module signing key"
|
||||
default "signing_key.pem"
|
||||
depends on MODULE_SIG
|
||||
help
|
||||
Provide the file name of a private key/certificate in PEM format,
|
||||
or a PKCS#11 URI according to RFC7512. The file should contain, or
|
||||
the URI should identify, both the certificate and its corresponding
|
||||
private key.
|
||||
|
||||
If this option is unchanged from its default "signing_key.pem",
|
||||
then the kernel will automatically generate the private key and
|
||||
certificate as described in Documentation/module-signing.txt
|
||||
|
||||
config MODULE_COMPRESS
|
||||
bool "Compress modules on installation"
|
||||
depends on MODULES
|
||||
|
||||
143
kernel/Makefile
143
kernel/Makefile
@ -45,7 +45,6 @@ ifneq ($(CONFIG_SMP),y)
|
||||
obj-y += up.o
|
||||
endif
|
||||
obj-$(CONFIG_UID16) += uid16.o
|
||||
obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
|
||||
obj-$(CONFIG_MODULES) += module.o
|
||||
obj-$(CONFIG_MODULE_SIG) += module_signing.o
|
||||
obj-$(CONFIG_KALLSYMS) += kallsyms.o
|
||||
@ -111,145 +110,3 @@ $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE
|
||||
targets += config_data.h
|
||||
$(obj)/config_data.h: $(obj)/config_data.gz FORCE
|
||||
$(call filechk,ikconfiggz)
|
||||
|
||||
###############################################################################
|
||||
#
|
||||
# When a Kconfig string contains a filename, it is suitable for
|
||||
# passing to shell commands. It is surrounded by double-quotes, and
|
||||
# any double-quotes or backslashes within it are escaped by
|
||||
# backslashes.
|
||||
#
|
||||
# This is no use for dependencies or $(wildcard). We need to strip the
|
||||
# surrounding quotes and the escaping from quotes and backslashes, and
|
||||
# we *do* need to escape any spaces in the string. So, for example:
|
||||
#
|
||||
# Usage: $(eval $(call config_filename,FOO))
|
||||
#
|
||||
# Defines FOO_FILENAME based on the contents of the CONFIG_FOO option,
|
||||
# transformed as described above to be suitable for use within the
|
||||
# makefile.
|
||||
#
|
||||
# Also, if the filename is a relative filename and exists in the source
|
||||
# tree but not the build tree, define FOO_SRCPREFIX as $(srctree)/ to
|
||||
# be prefixed to *both* command invocation and dependencies.
|
||||
#
|
||||
# Note: We also print the filenames in the quiet_cmd_foo text, and
|
||||
# perhaps ought to have a version specially escaped for that purpose.
|
||||
# But it's only cosmetic, and $(patsubst "%",%,$(CONFIG_FOO)) is good
|
||||
# enough. It'll strip the quotes in the common case where there's no
|
||||
# space and it's a simple filename, and it'll retain the quotes when
|
||||
# there's a space. There are some esoteric cases in which it'll print
|
||||
# the wrong thing, but we don't really care. The actual dependencies
|
||||
# and commands *do* get it right, with various combinations of single
|
||||
# and double quotes, backslashes and spaces in the filenames.
|
||||
#
|
||||
###############################################################################
|
||||
#
|
||||
quote := $(firstword " ")
|
||||
space :=
|
||||
space +=
|
||||
space_escape := %%%SPACE%%%
|
||||
#
|
||||
define config_filename
|
||||
ifneq ($$(CONFIG_$(1)),"")
|
||||
$(1)_FILENAME := $$(subst \\,\,$$(subst \$$(quote),$$(quote),$$(subst $$(space_escape),\$$(space),$$(patsubst "%",%,$$(subst $$(space),$$(space_escape),$$(CONFIG_$(1)))))))
|
||||
ifneq ($$(patsubst /%,%,$$(firstword $$($(1)_FILENAME))),$$(firstword $$($(1)_FILENAME)))
|
||||
else
|
||||
ifeq ($$(wildcard $$($(1)_FILENAME)),)
|
||||
ifneq ($$(wildcard $$(srctree)/$$($(1)_FILENAME)),)
|
||||
$(1)_SRCPREFIX := $(srctree)/
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
endef
|
||||
#
|
||||
###############################################################################
|
||||
|
||||
ifeq ($(CONFIG_SYSTEM_TRUSTED_KEYRING),y)
|
||||
|
||||
$(eval $(call config_filename,SYSTEM_TRUSTED_KEYS))
|
||||
|
||||
# GCC doesn't include .incbin files in -MD generated dependencies (PR#66871)
|
||||
$(obj)/system_certificates.o: $(obj)/x509_certificate_list
|
||||
|
||||
# Cope with signing_key.x509 existing in $(srctree) not $(objtree)
|
||||
AFLAGS_system_certificates.o := -I$(srctree)
|
||||
|
||||
quiet_cmd_extract_certs = EXTRACT_CERTS $(patsubst "%",%,$(2))
|
||||
cmd_extract_certs = scripts/extract-cert $(2) $@ || ( rm $@; exit 1)
|
||||
|
||||
targets += x509_certificate_list
|
||||
$(obj)/x509_certificate_list: scripts/extract-cert $(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(SYSTEM_TRUSTED_KEYS_FILENAME) FORCE
|
||||
$(call if_changed,extract_certs,$(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_TRUSTED_KEYS))
|
||||
endif
|
||||
|
||||
clean-files := x509_certificate_list .x509.list
|
||||
|
||||
ifeq ($(CONFIG_MODULE_SIG),y)
|
||||
###############################################################################
|
||||
#
|
||||
# If module signing is requested, say by allyesconfig, but a key has not been
|
||||
# supplied, then one will need to be generated to make sure the build does not
|
||||
# fail and that the kernel may be used afterwards.
|
||||
#
|
||||
###############################################################################
|
||||
ifndef CONFIG_MODULE_SIG_HASH
|
||||
$(error Could not determine digest type to use from kernel config)
|
||||
endif
|
||||
|
||||
# We do it this way rather than having a boolean option for enabling an
|
||||
# external private key, because 'make randconfig' might enable such a
|
||||
# boolean option and we unfortunately can't make it depend on !RANDCONFIG.
|
||||
ifeq ($(CONFIG_MODULE_SIG_KEY),"signing_key.pem")
|
||||
signing_key.pem: x509.genkey
|
||||
@echo "###"
|
||||
@echo "### Now generating an X.509 key pair to be used for signing modules."
|
||||
@echo "###"
|
||||
@echo "### If this takes a long time, you might wish to run rngd in the"
|
||||
@echo "### background to keep the supply of entropy topped up. It"
|
||||
@echo "### needs to be run as root, and uses a hardware random"
|
||||
@echo "### number generator if one is available."
|
||||
@echo "###"
|
||||
openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
|
||||
-batch -x509 -config x509.genkey \
|
||||
-outform PEM -out signing_key.pem \
|
||||
-keyout signing_key.pem 2>&1
|
||||
@echo "###"
|
||||
@echo "### Key pair generated."
|
||||
@echo "###"
|
||||
|
||||
x509.genkey:
|
||||
@echo Generating X.509 key generation config
|
||||
@echo >x509.genkey "[ req ]"
|
||||
@echo >>x509.genkey "default_bits = 4096"
|
||||
@echo >>x509.genkey "distinguished_name = req_distinguished_name"
|
||||
@echo >>x509.genkey "prompt = no"
|
||||
@echo >>x509.genkey "string_mask = utf8only"
|
||||
@echo >>x509.genkey "x509_extensions = myexts"
|
||||
@echo >>x509.genkey
|
||||
@echo >>x509.genkey "[ req_distinguished_name ]"
|
||||
@echo >>x509.genkey "#O = Unspecified company"
|
||||
@echo >>x509.genkey "CN = Build time autogenerated kernel key"
|
||||
@echo >>x509.genkey "#emailAddress = unspecified.user@unspecified.company"
|
||||
@echo >>x509.genkey
|
||||
@echo >>x509.genkey "[ myexts ]"
|
||||
@echo >>x509.genkey "basicConstraints=critical,CA:FALSE"
|
||||
@echo >>x509.genkey "keyUsage=digitalSignature"
|
||||
@echo >>x509.genkey "subjectKeyIdentifier=hash"
|
||||
@echo >>x509.genkey "authorityKeyIdentifier=keyid"
|
||||
endif
|
||||
|
||||
$(eval $(call config_filename,MODULE_SIG_KEY))
|
||||
|
||||
# If CONFIG_MODULE_SIG_KEY isn't a PKCS#11 URI, depend on it
|
||||
ifeq ($(patsubst pkcs11:%,%,$(firstword $(MODULE_SIG_KEY_FILENAME))),$(firstword $(MODULE_SIG_KEY_FILENAME)))
|
||||
X509_DEP := $(MODULE_SIG_KEY_SRCPREFIX)$(MODULE_SIG_KEY_FILENAME)
|
||||
endif
|
||||
|
||||
# GCC PR#66871 again.
|
||||
$(obj)/system_certificates.o: signing_key.x509
|
||||
|
||||
signing_key.x509: scripts/extract-cert include/config/module/sig/key.h $(X509_DEP)
|
||||
$(call cmd,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY))
|
||||
endif
|
||||
|
||||
@ -303,3 +303,54 @@ why = \
|
||||
|
||||
echo-why = $(call escsq, $(strip $(why)))
|
||||
endif
|
||||
|
||||
###############################################################################
|
||||
#
|
||||
# When a Kconfig string contains a filename, it is suitable for
|
||||
# passing to shell commands. It is surrounded by double-quotes, and
|
||||
# any double-quotes or backslashes within it are escaped by
|
||||
# backslashes.
|
||||
#
|
||||
# This is no use for dependencies or $(wildcard). We need to strip the
|
||||
# surrounding quotes and the escaping from quotes and backslashes, and
|
||||
# we *do* need to escape any spaces in the string. So, for example:
|
||||
#
|
||||
# Usage: $(eval $(call config_filename,FOO))
|
||||
#
|
||||
# Defines FOO_FILENAME based on the contents of the CONFIG_FOO option,
|
||||
# transformed as described above to be suitable for use within the
|
||||
# makefile.
|
||||
#
|
||||
# Also, if the filename is a relative filename and exists in the source
|
||||
# tree but not the build tree, define FOO_SRCPREFIX as $(srctree)/ to
|
||||
# be prefixed to *both* command invocation and dependencies.
|
||||
#
|
||||
# Note: We also print the filenames in the quiet_cmd_foo text, and
|
||||
# perhaps ought to have a version specially escaped for that purpose.
|
||||
# But it's only cosmetic, and $(patsubst "%",%,$(CONFIG_FOO)) is good
|
||||
# enough. It'll strip the quotes in the common case where there's no
|
||||
# space and it's a simple filename, and it'll retain the quotes when
|
||||
# there's a space. There are some esoteric cases in which it'll print
|
||||
# the wrong thing, but we don't really care. The actual dependencies
|
||||
# and commands *do* get it right, with various combinations of single
|
||||
# and double quotes, backslashes and spaces in the filenames.
|
||||
#
|
||||
###############################################################################
|
||||
#
|
||||
space_escape := %%%SPACE%%%
|
||||
#
|
||||
define config_filename
|
||||
ifneq ($$(CONFIG_$(1)),"")
|
||||
$(1)_FILENAME := $$(subst \\,\,$$(subst \$$(quote),$$(quote),$$(subst $$(space_escape),\$$(space),$$(patsubst "%",%,$$(subst $$(space),$$(space_escape),$$(CONFIG_$(1)))))))
|
||||
ifneq ($$(patsubst /%,%,$$(firstword $$($(1)_FILENAME))),$$(firstword $$($(1)_FILENAME)))
|
||||
else
|
||||
ifeq ($$(wildcard $$($(1)_FILENAME)),)
|
||||
ifneq ($$(wildcard $$(srctree)/$$($(1)_FILENAME)),)
|
||||
$(1)_SRCPREFIX := $(srctree)/
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
endef
|
||||
#
|
||||
###############################################################################
|
||||
|
||||
Loading…
Reference in New Issue
Block a user