Hi,
I previously reported that GCC46 (namely 4.6) has a bug with this conventions
and should be used with the follow definition
DEFINE GCC46_X64_CC_FLAGS = DEF(GCC45_X64_CC_FLAGS)
-Wno-unused-but-set-variable -mabi=ms
Hope it helps,
Sergey
21.03.2013, в 20:23, Andrew Fish написал(а):
> Tomer,
>
> It is a bug in your code. You need to use the correct function prototypes,
> and you especially need to use EFIAPI correctly.
>
> This is bad:
> (EFI_AP_PROCEDURE)GetThread,
>
> You need to make GetThead() have the proper prototype.
>
> For GCC 4.6 the generic calling convention is the Unix ABI for X64. This
> means the 1st 6 args are passed in registers and the register sequence is
> different than the 4 register used in EFIABI (Microsoft X64 ABI subset). GCC
> only generates EFIABI if the function has the EFIABI qualifier in its
> definition.
>
> So any indirect function call needs to have EFIABI. Thus any protocol member
> function, pointer to function, EFI Event function, and function passed via
> an API needs to have the EFIABI qualifier. Also any assembly code C function
> prototype needs to have EFIABI so it gets called correctly.
>
> Andrew Fish
>
>
>
>
>
> On Mar 21, 2013, at 2:36 AM, "Shalev, Tomer" <tomer.sha...@intel.com> wrote:
>
>> Hi There,
>>
>> Calls to StartupThisAP() does not work as expected when I build my UEFI
>> application from GCC 4.6 under Linux. If I build it under Windows using
>> Visual Studio 2010, it works…
>>
>> In GCC built application, The GetThread application receives a different
>> value in its argument list than expected, according to what was passed to
>> StartupThisAP(). I actually get 1, 4 and 5 for Ap's 1, 2 and 3,
>> respectively, which might indicate that I get their APIC ID numbers.
>>
>> I suspect there are other functionality that doesn't work as expected in
>> such situation, such as Int86().
>>
>> I would be thankful if you can help me with this.
>> Attached is a sample application that works when compiled in Windows but
>> fails when compiled by GCC in Linux. Password is 12345678
>>
>> Thanks,
>> Tomer
>>
>>
>> Tomer Shalev
>> Mobile: 054-2271307
>> Tel: 04-8656713 (Inet 8-465-6713)
>> Office: IDC6 4Y1 P4-2, SSG, Intel Inc.
>> E-mail: tomer.sha...@intel.com
>>
>> <MpTestPkg.zip>
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