linux-kernel - Re: [PATCH] kernel: Assembly: need add prefix for h8300 architecture.

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Message-ID: <87txibbtt3.fsf@rustcorp.com.au>
Date:	Tue, 27 Aug 2013 14:42:56 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Chen Gang <gang.chen@...anux.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	James Hogan <james.hogan@...tec.com>,
	Takashi Iwai <tiwai@...e.de>
Cc:	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel: Assembly: need add prefix for h8300 architecture.

Chen Gang <gang.chen@...anux.com> writes:
> If this implementation is correct, the implementation still can be
> improved (at least, it is not quite well to hard code the architecture
> related code in "kernel/" and "usr/" sub-directory).
>
> But it seems, I have no right to add or move files, so welcome any
> members help do it.
>
> And welcome any additional suggestions or completions.

Hmm, how about something like:

#ifdef CONFIG_ARCH_ASM_INCBIN_NEEDS_PREFIX
#include <asm/incbin_prefix.h>
        ASM_INCBIN_PREFIX
#endif /* ARCH_ASM_INCBIN_NEEDS_PREFIX */

Then h8300 can define ARCH_ASM_INCBIN_NEEDS_PREFIX in Kconfig and define
ASM_INCBIN_PREFIX in arch/h8300/include/asm/incbin_prefix.h?

Cheers,
Rusty.

> On 08/26/2013 06:42 PM, Chen Gang wrote:
>> Need add related prefix for h8300, or can not pass compiling by the
>> latest linker.
>> 
>> The related error (allmodconfig for h8300):
>> 
>>   /usr/local/bin/h8300-gchen-elf-ld: h8300 architecture of input file `usr/initramfs_data.o' is incompatible with h8300h output
>>   /usr/local/bin/h8300-gchen-elf-ld: h8300 architecture of input file `kernel/modsign_certificate.o' is incompatible with h8300h output
>> 
>> The cross-compiler's information:
>> 
>>   [root@...p122 linux-next]# /usr/local/bin/h8300-gchen-elf-ld -v
>>   GNU ld (GNU Binutils) 2.22
>>   [root@...p122 linux-next]# /usr/local/bin/h8300-gchen-elf-as -v
>>   GNU assembler version 2.22 (h8300-gchen-elf) using BFD version (GNU Binutils) 2.22
>>   
>>   [root@...p122 linux-next]# /usr/local/bin/h8300-gchen-elf-gcc -v
>>   Using built-in specs.
>>   COLLECT_GCC=/usr/local/bin/h8300-gchen-elf-gcc
>>   COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/h8300-gchen-elf/4.8.0/lto-wrapper
>>   Target: h8300-gchen-elf
>>   Configured with: ../gcc-4.8.0/configure --target=h8300-gchen-elf --without-header --disable-nls --enable-language=c --disable-threads --disable-shared --enable-werror=no
>>   Thread model: single
>>   gcc version 4.8.0 (GCC) 
>> 
>> 
>> Signed-off-by: Chen Gang <gang.chen@...anux.com>
>> ---
>>  kernel/modsign_certificate.S |    7 +++++++
>>  usr/initramfs_data.S         |    7 +++++++
>>  2 files changed, 14 insertions(+), 0 deletions(-)
>> 
>> diff --git a/kernel/modsign_certificate.S b/kernel/modsign_certificate.S
>> index 4a9a86d..d24acac 100644
>> --- a/kernel/modsign_certificate.S
>> +++ b/kernel/modsign_certificate.S
>> @@ -1,5 +1,12 @@
>>  #include <linux/export.h>
>>  
>> +#if defined(CONFIG_CPU_H8300H)
>> +	.h8300h
>> +#endif
>> +#if defined(CONFIG_CPU_H8S)
>> +	.h8300s
>> +#endif
>> +
>>  #define GLOBAL(name)	\
>>  	.globl VMLINUX_SYMBOL(name);	\
>>  	VMLINUX_SYMBOL(name):
>> diff --git a/usr/initramfs_data.S b/usr/initramfs_data.S
>> index c14322d..6a6c106 100644
>> --- a/usr/initramfs_data.S
>> +++ b/usr/initramfs_data.S
>> @@ -24,6 +24,13 @@
>>  #include <linux/stringify.h>
>>  #include <asm-generic/vmlinux.lds.h>
>>  
>> +#if defined(CONFIG_CPU_H8300H)
>> +	.h8300h
>> +#endif
>> +#if defined(CONFIG_CPU_H8S)
>> +	.h8300s
>> +#endif
>> +
>>  .section .init.ramfs,"a"
>>  __irf_start:
>>  .incbin __stringify(INITRAMFS_IMAGE)
>> 
>
>
> -- 
> Chen Gang
--
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