linux/scripts/Makefile.modpost

228 lines
7.2 KiB

MODSIGN: Sign modules during the build process If CONFIG_MODULE_SIG is set, then this patch will cause all modules files to to have signatures added. The following steps will occur: (1) The module will be linked to foo.ko.unsigned instead of foo.ko (2) The module will be stripped using both "strip -x -g" and "eu-strip" to ensure minimal size for inclusion in an initramfs. (3) The signature will be generated on the stripped module. (4) The signature will be appended to the module, along with some information about the signature and a magic string that indicates the presence of the signature. Step (3) requires private and public keys to be available. By default these are expected to be found in files: signing_key.priv signing_key.x509 in the base directory of the build. The first is the private key in PEM form and the second is the X.509 certificate in DER form as can be generated from openssl: openssl req \ -new -x509 -outform PEM -out signing_key.x509 \ -keyout signing_key.priv -nodes \ -subj "/CN=H2G2/O=Magrathea/CN=Slartibartfast" If the secret key is not found then signing will be skipped and the unsigned module from (1) will just be copied to foo.ko. If signing occurs, lines like the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped SIGN [M] fs/foo/foo.ko will appear in the build log. If the signature step will be skipped and the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped NO SIGN [M] fs/foo/foo.ko NOTE! After the signature step, the signed module _must_not_ be passed through strip. The unstripped, unsigned module is still available at the name on the LD [M] line. This restriction may affect packaging tools (such as rpmbuild) and initramfs composition tools. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-26 10:11:06 +01:00
MODSIGN: Sign modules during the build process If CONFIG_MODULE_SIG is set, then this patch will cause all modules files to to have signatures added. The following steps will occur: (1) The module will be linked to foo.ko.unsigned instead of foo.ko (2) The module will be stripped using both "strip -x -g" and "eu-strip" to ensure minimal size for inclusion in an initramfs. (3) The signature will be generated on the stripped module. (4) The signature will be appended to the module, along with some information about the signature and a magic string that indicates the presence of the signature. Step (3) requires private and public keys to be available. By default these are expected to be found in files: signing_key.priv signing_key.x509 in the base directory of the build. The first is the private key in PEM form and the second is the X.509 certificate in DER form as can be generated from openssl: openssl req \ -new -x509 -outform PEM -out signing_key.x509 \ -keyout signing_key.priv -nodes \ -subj "/CN=H2G2/O=Magrathea/CN=Slartibartfast" If the secret key is not found then signing will be skipped and the unsigned module from (1) will just be copied to foo.ko. If signing occurs, lines like the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped SIGN [M] fs/foo/foo.ko will appear in the build log. If the signature step will be skipped and the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped NO SIGN [M] fs/foo/foo.ko NOTE! After the signature step, the signed module _must_not_ be passed through strip. The unstripped, unsigned module is still available at the name on the LD [M] line. This restriction may affect packaging tools (such as rpmbuild) and initramfs composition tools. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-26 10:11:06 +01:00
kbuild: add verbose option to Section mismatch reporting in modpost If the config option CONFIG_SECTION_MISMATCH is not set and we see a Section mismatch present the following to the user: modpost: Found 1 section mismatch(es). To see additional details select "Enable full Section mismatch analysis" in the Kernel Hacking menu (CONFIG_SECTION_MISMATCH). If the option CONFIG_SECTION_MISMATCH is selected then be verbose in the Section mismatch reporting from mdopost. Sample outputs: WARNING: o-x86_64/vmlinux.o(.text+0x7396): Section mismatch in reference from the function discover_ebda() to the variable .init.data:ebda_addr The function discover_ebda() references the variable __initdata ebda_addr. This is often because discover_ebda lacks a __initdata annotation or the annotation of ebda_addr is wrong. WARNING: o-x86_64/vmlinux.o(.data+0x74d58): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit() The variable pci_serial_quirks references the function __devexit pci_plx9050_exit() If the reference is valid then annotate the variable with __exit* (see linux/init.h) or name the variable: *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console, WARNING: o-x86_64/vmlinux.o(__ksymtab+0x630): Section mismatch in reference from the variable __ksymtab_arch_register_cpu to the function .cpuinit.text:arch_register_cpu() The symbol arch_register_cpu is exported and annotated __cpuinit Fix this by removing the __cpuinit annotation of arch_register_cpu or drop the export. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-01-24 21:12:37 +01:00
kbuild: allow assignment to {A,C,LD}FLAGS_MODULE on the command line It is now possible to assign options to AS, CC and LD on the command line - which is only used when building modules. {A,C,LD}FLAGS_MODULE was all used both in the top-level Makefile in the arch makefiles, thus users had no way to specify additional options to AS, CC, LD when building modules without overriding the original value. Introduce a new set of variables KBUILD_{A,C,LD}FLAGS_MODULE that is used by arch specific files and free up {A,C,LD}FLAGS_MODULE so they can be assigned on the command line. All arch Makefiles that used the old variables has been updated. Note: Previously we had a MODFLAGS variable for both AS and CC. But in favour of consistency this was dropped. So in some cases arch Makefile has one assignmnet replaced by two assignmnets. Note2: MODFLAGS was not documented and is dropped without any notice. I do not expect much/any breakage from this. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Denys Vlasenko <vda.linux@googlemail.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Acked-by: Mike Frysinger <vapier@gentoo.org> [blackfin] Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [avr32] Signed-off-by: Michal Marek <mmarek@suse.cz>
2010-07-28 17:33:09 +02:00
MODSIGN: Sign modules during the build process If CONFIG_MODULE_SIG is set, then this patch will cause all modules files to to have signatures added. The following steps will occur: (1) The module will be linked to foo.ko.unsigned instead of foo.ko (2) The module will be stripped using both "strip -x -g" and "eu-strip" to ensure minimal size for inclusion in an initramfs. (3) The signature will be generated on the stripped module. (4) The signature will be appended to the module, along with some information about the signature and a magic string that indicates the presence of the signature. Step (3) requires private and public keys to be available. By default these are expected to be found in files: signing_key.priv signing_key.x509 in the base directory of the build. The first is the private key in PEM form and the second is the X.509 certificate in DER form as can be generated from openssl: openssl req \ -new -x509 -outform PEM -out signing_key.x509 \ -keyout signing_key.priv -nodes \ -subj "/CN=H2G2/O=Magrathea/CN=Slartibartfast" If the secret key is not found then signing will be skipped and the unsigned module from (1) will just be copied to foo.ko. If signing occurs, lines like the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped SIGN [M] fs/foo/foo.ko will appear in the build log. If the signature step will be skipped and the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped NO SIGN [M] fs/foo/foo.ko NOTE! After the signature step, the signed module _must_not_ be passed through strip. The unstripped, unsigned module is still available at the name on the LD [M] line. This restriction may affect packaging tools (such as rpmbuild) and initramfs composition tools. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-26 10:11:06 +01:00
kbuild: allow assignment to {A,C,LD}FLAGS_MODULE on the command line It is now possible to assign options to AS, CC and LD on the command line - which is only used when building modules. {A,C,LD}FLAGS_MODULE was all used both in the top-level Makefile in the arch makefiles, thus users had no way to specify additional options to AS, CC, LD when building modules without overriding the original value. Introduce a new set of variables KBUILD_{A,C,LD}FLAGS_MODULE that is used by arch specific files and free up {A,C,LD}FLAGS_MODULE so they can be assigned on the command line. All arch Makefiles that used the old variables has been updated. Note: Previously we had a MODFLAGS variable for both AS and CC. But in favour of consistency this was dropped. So in some cases arch Makefile has one assignmnet replaced by two assignmnets. Note2: MODFLAGS was not documented and is dropped without any notice. I do not expect much/any breakage from this. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Denys Vlasenko <vda.linux@googlemail.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Acked-by: Mike Frysinger <vapier@gentoo.org> [blackfin] Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [avr32] Signed-off-by: Michal Marek <mmarek@suse.cz>
2010-07-28 17:33:09 +02:00
MODSIGN: Sign modules during the build process If CONFIG_MODULE_SIG is set, then this patch will cause all modules files to to have signatures added. The following steps will occur: (1) The module will be linked to foo.ko.unsigned instead of foo.ko (2) The module will be stripped using both "strip -x -g" and "eu-strip" to ensure minimal size for inclusion in an initramfs. (3) The signature will be generated on the stripped module. (4) The signature will be appended to the module, along with some information about the signature and a magic string that indicates the presence of the signature. Step (3) requires private and public keys to be available. By default these are expected to be found in files: signing_key.priv signing_key.x509 in the base directory of the build. The first is the private key in PEM form and the second is the X.509 certificate in DER form as can be generated from openssl: openssl req \ -new -x509 -outform PEM -out signing_key.x509 \ -keyout signing_key.priv -nodes \ -subj "/CN=H2G2/O=Magrathea/CN=Slartibartfast" If the secret key is not found then signing will be skipped and the unsigned module from (1) will just be copied to foo.ko. If signing occurs, lines like the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped SIGN [M] fs/foo/foo.ko will appear in the build log. If the signature step will be skipped and the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped NO SIGN [M] fs/foo/foo.ko NOTE! After the signature step, the signed module _must_not_ be passed through strip. The unstripped, unsigned module is still available at the name on the LD [M] line. This restriction may affect packaging tools (such as rpmbuild) and initramfs composition tools. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-26 10:11:06 +01:00
MODSIGN: Sign modules during the build process If CONFIG_MODULE_SIG is set, then this patch will cause all modules files to to have signatures added. The following steps will occur: (1) The module will be linked to foo.ko.unsigned instead of foo.ko (2) The module will be stripped using both "strip -x -g" and "eu-strip" to ensure minimal size for inclusion in an initramfs. (3) The signature will be generated on the stripped module. (4) The signature will be appended to the module, along with some information about the signature and a magic string that indicates the presence of the signature. Step (3) requires private and public keys to be available. By default these are expected to be found in files: signing_key.priv signing_key.x509 in the base directory of the build. The first is the private key in PEM form and the second is the X.509 certificate in DER form as can be generated from openssl: openssl req \ -new -x509 -outform PEM -out signing_key.x509 \ -keyout signing_key.priv -nodes \ -subj "/CN=H2G2/O=Magrathea/CN=Slartibartfast" If the secret key is not found then signing will be skipped and the unsigned module from (1) will just be copied to foo.ko. If signing occurs, lines like the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped SIGN [M] fs/foo/foo.ko will appear in the build log. If the signature step will be skipped and the following will be seen: LD [M] fs/foo/foo.ko.unsigned STRIP [M] fs/foo/foo.ko.stripped NO SIGN [M] fs/foo/foo.ko NOTE! After the signature step, the signed module _must_not_ be passed through strip. The unstripped, unsigned module is still available at the name on the LD [M] line. This restriction may affect packaging tools (such as rpmbuild) and initramfs composition tools. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-26 10:11:06 +01:00