Re: [edk2-devel] [PATCH v3 5/6] OvmfPkg/ResetVector: add 5-level paging support

["Laszlo Ersek" <lersek@redhat.com>]

On 2/20/24 18:45, Laszlo Ersek wrote:

> (I'm using quotes around "subroutines" and "call" because we don't have
> a stack at this point yet, IIUC, so all our "one time calls" are
> actually just normal jumps, with some NASM macro magic. That's fine,
> we're only talking a handful of assembly instructions here, so
> readability definitely trumps code path reuse. SECFV only contains
> SecMain and ResetVector, and it's only 26% full -- 56K used, 152K free,
> out of 208K total.)

Sorry, those numbers were for IA32X64, which is not right for this
discussion -- we need to look at X64.

NOOPT GCC5 X64 is:

SECFV [49%Full] 212992 (0x34000) total, 106000 (0x19e10) used, 106992
(0x1a1f0) free

That should still be plenty roomy for disentangling all three code paths
here.

Laszlo



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