Messages in this thread | | | Date | Fri, 02 Feb 2007 09:32:26 +0800 | From | "bibo,mao" <> | Subject | Re: [PATCH] EFI x86: pass firmware call parameters on the stack |
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Frederic Riss wrote: > 2007/2/1, bibo,mao <bibo_mao@linux.intel.com>: >> currently x86_64 kernel does not support efi, efi convention comply to >> MS convention. On ia32 parameter is passed on stack, on x86_64 parameter >> is passed by registers but that is different from x86_64 linux >> convention. > > Is an x86_64 EFI firmware required to have 2 entry points, one x86_64 > and one in ia32 mode ? If that's not the case, it means that an i386 > kernel won't be able to work correctly on an EFI powered x86_64 box... > AFAIK x86_64 EFI firmware now has only one entry point, i386 kernel can not boot up with EFI powered x86_64 box.
>> How about adding EFIAPI prefix before efi runtime service function, this >> prefix has different definition in different architecture. > > Have you any objection to the second patch I posted? It's not only a > matter of passing arguments, ia64 does quite a lot of things in its > wrapper functions. I can easily imagine that such additional work > could be added in the i386 wrappers if EFI becomes more widely used. > I do not object your second patch if there will be more wrapper functions to be added in i386 efi code. I have to give up my patch:)
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