linux/kernel/modsign_certificate.S

#include <linux/export.h>

#define GLOBAL(name)	\
	.globl VMLINUX_SYMBOL(name);	\
	VMLINUX_SYMBOL(name):

	.section ".init.data","aw"

GLOBAL(modsign_certificate_list)
	.incbin "signing_key.x509"
	.incbin "extra_certificates"
GLOBAL(modsign_certificate_list_end)
CONFIG_SYMBOL_PREFIX: cleanup. We have CONFIG_SYMBOL_PREFIX, which three archs define to the string "_". But Al Viro broke this in "consolidate cond_syscall and SYSCALL_ALIAS declarations" (in linux-next), and he's not the first to do so. Using CONFIG_SYMBOL_PREFIX is awkward, since we usually just want to prefix it so something. So various places define helpers which are defined to nothing if CONFIG_SYMBOL_PREFIX isn't set: 1) include/asm-generic/unistd.h defines __SYMBOL_PREFIX. 2) include/asm-generic/vmlinux.lds.h defines VMLINUX_SYMBOL(sym) 3) include/linux/export.h defines MODULE_SYMBOL_PREFIX. 4) include/linux/kernel.h defines SYMBOL_PREFIX (which differs from #7) 5) kernel/modsign_certificate.S defines ASM_SYMBOL(sym) 6) scripts/modpost.c defines MODULE_SYMBOL_PREFIX 7) scripts/Makefile.lib defines SYMBOL_PREFIX on the commandline if CONFIG_SYMBOL_PREFIX is set, so that we have a non-string version for pasting. (arch/h8300/include/asm/linkage.h defines SYMBOL_NAME(), too). Let's solve this properly: 1) No more generic prefix, just CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX. 2) Make linux/export.h usable from asm. 3) Define VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR(). 4) Make everyone use them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> Tested-by: James Hogan <james.hogan@imgtec.com> (metag) 2013-03-15 12:34:17 +08:00			`#include <linux/export.h>`
MODSIGN: Avoid using .incbin in C source Using the asm .incbin statement in C sources breaks any gcc wrapper which assumes that preprocessed C source is self-contained. Use a separate .S file to include the siging key and certificate. [ This means we no longer need SYMBOL_PREFIX which is defined in kernel.h from cbdbf2abb7844548a7d7a6a2ae7af6b6fbcea401, so I removed it -- RR ] Tested-by: Michal Marek <mmarek@suse.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: James Hogan <james.hogan@imgtec.com> 2012-12-11 09:07:13 +08:00
			`#define GLOBAL(name) \`
CONFIG_SYMBOL_PREFIX: cleanup. We have CONFIG_SYMBOL_PREFIX, which three archs define to the string "_". But Al Viro broke this in "consolidate cond_syscall and SYSCALL_ALIAS declarations" (in linux-next), and he's not the first to do so. Using CONFIG_SYMBOL_PREFIX is awkward, since we usually just want to prefix it so something. So various places define helpers which are defined to nothing if CONFIG_SYMBOL_PREFIX isn't set: 1) include/asm-generic/unistd.h defines __SYMBOL_PREFIX. 2) include/asm-generic/vmlinux.lds.h defines VMLINUX_SYMBOL(sym) 3) include/linux/export.h defines MODULE_SYMBOL_PREFIX. 4) include/linux/kernel.h defines SYMBOL_PREFIX (which differs from #7) 5) kernel/modsign_certificate.S defines ASM_SYMBOL(sym) 6) scripts/modpost.c defines MODULE_SYMBOL_PREFIX 7) scripts/Makefile.lib defines SYMBOL_PREFIX on the commandline if CONFIG_SYMBOL_PREFIX is set, so that we have a non-string version for pasting. (arch/h8300/include/asm/linkage.h defines SYMBOL_NAME(), too). Let's solve this properly: 1) No more generic prefix, just CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX. 2) Make linux/export.h usable from asm. 3) Define VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR(). 4) Make everyone use them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> Tested-by: James Hogan <james.hogan@imgtec.com> (metag) 2013-03-15 12:34:17 +08:00			`.globl VMLINUX_SYMBOL(name); \`
			`VMLINUX_SYMBOL(name):`
MODSIGN: Avoid using .incbin in C source Using the asm .incbin statement in C sources breaks any gcc wrapper which assumes that preprocessed C source is self-contained. Use a separate .S file to include the siging key and certificate. [ This means we no longer need SYMBOL_PREFIX which is defined in kernel.h from cbdbf2abb7844548a7d7a6a2ae7af6b6fbcea401, so I removed it -- RR ] Tested-by: Michal Marek <mmarek@suse.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: James Hogan <james.hogan@imgtec.com> 2012-12-11 09:07:13 +08:00
			`.section ".init.data","aw"`

			`GLOBAL(modsign_certificate_list)`
			`.incbin "signing_key.x509"`
			`.incbin "extra_certificates"`
			`GLOBAL(modsign_certificate_list_end)`