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[PING] Re: [RFA/gold] Patch to workaround ARM1176 BLX(immediate) Thumb to ARM issue

Doug Kwan (關振德) dougkwan@google.com
Wed Nov 2 19:04:00 GMT 2011 
I am fine with your patch but Ian has to approve.

-Doug

On Wed, Nov 2, 2011 at 3:44 AM, Matthew Gretton-Dann
<matthew.gretton-dann@arm.com> wrote:
> Ping.
>
> On 26/09/11 20:52, Doug Kwan (關振德) wrote:
>>
>> The main patch also looks okay.  You can check both in if Ian is okay
>> with that.
>>
>> -Doug
>>
>> On Mon, Sep 26, 2011 at 11:41 AM, Doug Kwan (關振德)
>> <dougkwan@google.com <mailto:dougkwan@google.com>> wrote:
>>
>>    Hi Matthew,
>>
>>       Thanks for fixing that.  That patch looks okay. My only concern is
>>    that may_use_v*t_interworking are called repeatedly and their values
>>    are constant.  Can you cache the values just like may_use_blx?
>>
>>    -Doug
>>
>>    On Mon, Sep 26, 2011 at 8:09 AM, Matthew Gretton-Dann
>>    <matthew.gretton-dann@arm.com <mailto:matthew.gretton-dann@arm.com>>
>>    wrote:
>>     > All,
>>     >
>>     > The attached patch adds the options --[no-]fix-arm1176 to Gold in
>>    a similar
>>     > manner to that done to Ld earlier this year (see
>>     > http://sourceware.org/ml/binutils/2011-07/msg00235.html).
>>     >
>>     > When --fix-arm1176 is turned on (the default) ARM v5T interworking
>>     > instructions are only available for ARM v6T2 and later
>> architectures.
>>     >
>>     > Further details on the erratum can be found on ARM's
>>    documentation website:
>>     > http://infocenter.arm.com/
>>     >      User Assistance Notes
>>     >        ARM11 Processors
>>     >          ARM1176JZ-S and ARM1176JFZ-S Programmer Advice Note
>>     >
>>     > This patch depends on my recently posted fixes to v4T/v5T
>>    interworking in
>>     > gold (http://sourceware.org/ml/binutils/2011-09/msg00186.html).
>>     >
>>     > Please can someone review.
>>     >
>>     > Thanks,
>>     >
>>     > Matt
>>     >
>>     > gold/ChangeLog
>>     > 2011-09-26  Matthew Gretton-Dann<matthew.gretton-dann@arm.com
>>    <mailto:matthew.gretton-dann@arm.com>>
>>     >
>>     >        * arm.cc (Target_arm::may_use_v5t_interworking): Check
>> whether
>>     >        we are working around the ARM1176 Erratum.
>>     >        * options.h (General_options::fix_arm1176): Add option.
>>     >        * testsuite/Makefile.am: Add testcases, and keep current ones
>>     >        working.
>>     >        * testsuite/Makefile.in: Regenerate.
>>     >        * testsuite/arm_fix_1176.s: New file.
>>     >        * testsuite/arm_fix_1176.sh: Likewise.
>>     >
>>     > --
>>     > Matthew Gretton-Dann
>>     > Principal Engineer, PD Software - Tools, ARM Ltd
>>
>>
>
> --
> Matthew Gretton-Dann
> Principal Engineer, PD Software - Tools, ARM Ltd
>
>
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