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SubjectRe: [PATCH] kernel/modsign_certificate.S: use real contents instead of macro GLOBAL()
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On Thu, Oct 24, 2013 at 7:31 AM, Chen Gang <gang.chen@asianux.com> wrote:
> For some architectures, tool chain is not smart enough to recognize the
> macro with multiple lines (e.g. arc tool chain), and for common ".S"
> file, this kind of macro is also rarely used.

Does not "not smart enough" mean than the said toolchain is broken/buggy
or is the kernel using an unsupported notation?

> So expand the related contents of macro to let it pass compiling (can
> use "arc-elf32-objdump -x" to know about it).
>
> The related error (allmodconfig for arc):
>
> LD init/built-in.o
> kernel/built-in.o: In function `load_module_signing_keys':
> kernel/modsign_pubkey.c:66: undefined reference to `modsign_certificate_list'
> kernel/modsign_pubkey.c:71: undefined reference to `modsign_certificate_list_end'
> kernel/modsign_pubkey.c:67: undefined reference to `modsign_certificate_list_end'
>
> The related tool chain information:
>
> [root@gchenlinux linux-next]# arc-elf32-as -v
> GNU assembler version 2.23.2 (arc-elf32) using BFD version (GNU Binutils) 2.23.2
> [root@gchenlinux linux-next]# arc-elf32-ld -v
> GNU ld (GNU Binutils) 2.23.2
> [root@gchenlinux linux-next]# arc-elf32-gcc -v
> Using built-in specs.
> COLLECT_GCC=arc-elf32-gcc
> COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/arc-elf32/4.8.0/lto-wrapper
> Target: arc-elf32
> Configured with: ../gcc/configure --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 : (reconfigured) ../gcc/configure --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 : (reconfigured) ../gcc/configure --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no target_configargs=enable_vtable_verify=yes --target=arc-elf32 --with-cpu=arc700 --disable-multilib --with-headers=../newlib/newlib/libc/include
> Thread model: single
> gcc version 4.8.0 (GCC)
>
>
> Signed-off-by: Chen Gang <gang.chen@asianux.com>
> ---
> kernel/modsign_certificate.S | 10 ++++------
> 1 files changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/kernel/modsign_certificate.S b/kernel/modsign_certificate.S
> index 4a9a86d..1967dcd 100644
> --- a/kernel/modsign_certificate.S
> +++ b/kernel/modsign_certificate.S
> @@ -1,12 +1,10 @@
> #include <linux/export.h>
>
> -#define GLOBAL(name) \
> - .globl VMLINUX_SYMBOL(name); \
> - VMLINUX_SYMBOL(name):
> -
> .section ".init.data","aw"
>
> -GLOBAL(modsign_certificate_list)
> + .globl VMLINUX_SYMBOL(modsign_certificate_list)
> +VMLINUX_SYMBOL(modsign_certificate_list):
> .incbin "signing_key.x509"
> .incbin "extra_certificates"
> -GLOBAL(modsign_certificate_list_end)
> + .globl VMLINUX_SYMBOL(modsign_certificate_list_end)
> +VMLINUX_SYMBOL(modsign_certificate_list_end):
> --
> 1.7.7.6
> --
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--
Thanks,
//richard


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