lkml.org 
[lkml]   [2013]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] arch: use ASM_NL instead of ';' for assembler new line character in the macro
On 11/01/2013 11:15 AM, Vineet Gupta wrote:
> +CC Sam, Tim, Joe, Michal, David
>
> Guys can you please take a look at this patch and suggest the best way to merge.
>
> The root cause is some gas ports (including ARC) use ';' for comment (vs. newline)
> More background at https://lkml.org/lkml/2013/10/24/365

Ping ! Any objections to this. Given that this is exception case, it is simpler
than defining a Kconfig control.

-Vineet
>
>
> On 10/29/2013 07:21 AM, Chen Gang wrote:
>> For some assemblers, they use another character as newline in a macro
>> (e.g. arc uses '`'), so for generic assembly code, need use ASM_NL (a
>> macro) instead of ';' for it.
>>
>> Also need notice about code styles ('\t' for each line).
>>
>>
>> Signed-off-by: Chen Gang <gang.chen@asianux.com>
>> ---
>> arch/arc/include/asm/linkage.h | 2 ++
>> include/linux/linkage.h | 19 ++++++++++++-------
>> 2 files changed, 14 insertions(+), 7 deletions(-)
>>
>> diff --git a/arch/arc/include/asm/linkage.h b/arch/arc/include/asm/linkage.h
>> index 0283e9e..66ee552 100644
>> --- a/arch/arc/include/asm/linkage.h
>> +++ b/arch/arc/include/asm/linkage.h
>> @@ -11,6 +11,8 @@
>>
>> #ifdef __ASSEMBLY__
>>
>> +#define ASM_NL ` /* use '`' to mark new line in macro */
>> +
>> /* Can't use the ENTRY macro in linux/linkage.h
>> * gas considers ';' as comment vs. newline
>> */
>> diff --git a/include/linux/linkage.h b/include/linux/linkage.h
>> index d3e8ad2..a6a42dd 100644
>> --- a/include/linux/linkage.h
>> +++ b/include/linux/linkage.h
>> @@ -6,6 +6,11 @@
>> #include <linux/export.h>
>> #include <asm/linkage.h>
>>
>> +/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
>> +#ifndef ASM_NL
>> +#define ASM_NL ;
>> +#endif
>> +
>> #ifdef __cplusplus
>> #define CPP_ASMLINKAGE extern "C"
>> #else
>> @@ -75,21 +80,21 @@
>>
>> #ifndef ENTRY
>> #define ENTRY(name) \
>> - .globl name; \
>> - ALIGN; \
>> - name:
>> + .globl name ASM_NL \
>> + ALIGN ASM_NL \
>> + name:
>> #endif
>> #endif /* LINKER_SCRIPT */
>>
>> #ifndef WEAK
>> #define WEAK(name) \
>> - .weak name; \
>> + .weak name ASM_NL \
>> name:
>> #endif
>>
>> #ifndef END
>> #define END(name) \
>> - .size name, .-name
>> + .size name, .-name
>> #endif
>>
>> /* If symbol 'name' is treated as a subroutine (gets called, and returns)
>> @@ -98,8 +103,8 @@
>> */
>> #ifndef ENDPROC
>> #define ENDPROC(name) \
>> - .type name, @function; \
>> - END(name)
>> + .type name, @function ASM_NL \
>> + END(name)
>> #endif
>>
>> #endif
>>
>



\
 
 \ /
  Last update: 2013-11-21 11:41    [W:0.095 / U:0.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site