* Memory alignment bug under iOS
@ 2012-08-15 2:28 cowwoc
2012-08-15 7:41 ` Andrew Haley
0 siblings, 1 reply; 3+ messages in thread
From: cowwoc @ 2012-08-15 2:28 UTC (permalink / raw)
To: libffi-discuss
Hi,
I believe there is a bug in sysv.S's usage of .align 0 under ARM. It
wrongfully assumes that Apple's Assembler interprets .align 0 as .align 2.
GNU's Assembler certainly does this:
http://sourceware.org/binutils/docs/as/ARM-Directives.html
but Apple's does not:
https://developer.apple.com/library/mac/#documentation/developertools/Reference/Assembler/040-Assembler_Directives/asm_directives.html
As a result, the generated code does not align memory correctly. I look
forward to your response.
Thanks,
Gili
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* Re: Memory alignment bug under iOS
2012-08-15 2:28 Memory alignment bug under iOS cowwoc
@ 2012-08-15 7:41 ` Andrew Haley
2012-08-15 13:29 ` cowwoc
0 siblings, 1 reply; 3+ messages in thread
From: Andrew Haley @ 2012-08-15 7:41 UTC (permalink / raw)
To: cowwoc; +Cc: libffi-discuss
On 08/15/2012 03:28 AM, cowwoc wrote:
> I believe there is a bug in sysv.S's usage of .align 0 under ARM. It
> wrongfully assumes that Apple's Assembler interprets .align 0 as .align 2.
> GNU's Assembler certainly does this:
> http://sourceware.org/binutils/docs/as/ARM-Directives.html
>
> but Apple's does not:
> https://developer.apple.com/library/mac/#documentation/developertools/Reference/Assembler/040-Assembler_Directives/asm_directives.html
>
> As a result, the generated code does not align memory correctly. I look
> forward to your response.
Can you submit a patch?
Thanks,
Andrew.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Memory alignment bug under iOS
2012-08-15 7:41 ` Andrew Haley
@ 2012-08-15 13:29 ` cowwoc
0 siblings, 0 replies; 3+ messages in thread
From: cowwoc @ 2012-08-15 13:29 UTC (permalink / raw)
To: libffi-discuss
Hi Andrew,
I'm going to merge this discussion with
http://old.nabble.com/please%2C-help-me-with-libffi-on-iOS-porting-td34250621.html#a34300375
Thanks,
Gili
Andrew Haley wrote:
>
> On 08/15/2012 03:28 AM, cowwoc wrote:
>
>> I believe there is a bug in sysv.S's usage of .align 0 under ARM. It
>> wrongfully assumes that Apple's Assembler interprets .align 0 as .align
>> 2.
>> GNU's Assembler certainly does this:
>> http://sourceware.org/binutils/docs/as/ARM-Directives.html
>>
>> but Apple's does not:
>> https://developer.apple.com/library/mac/#documentation/developertools/Reference/Assembler/040-Assembler_Directives/asm_directives.html
>>
>> As a result, the generated code does not align memory correctly. I look
>> forward to your response.
>
> Can you submit a patch?
>
> Thanks,
> Andrew.
>
>
>
>
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2012-08-15 13:29 ` cowwoc
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