On Fri, 10 Feb 2023 at 02:21, Rebecca Cran <rebe...@bsdio.com> wrote: > > Mike, > > Yes, it passed CI - see https://github.com/tianocore/edk2/pull/4022 . > > I wasn't sure if we cared about EBC builds these days. Given the link on > https://www.intel.com/content/www/us/en/architecture-and-technology/unified-extensible-firmware-interface/efi-homepage-general-technology.html > to the compiler goes to a generic page that doesn't mention it, is it > possible to get a copy if I want to verify if changes I'm making are > compatible? >
We tried to get access to this at Linaro, but I don't think it is still available. Leif may remember better. > I know there was a project to add support for building EBC using LLVM, > but I'm not sure if anything came of it. > No that never went anywhere afaik. The problem was that, in EBC, sizeof() is not a compile time constant, and this breaks too many assumptions in the existing frontends, so this would only be feasible if we restricted ourselves to a specialized version of EBC that targets 64-bit architectures only, but this seems like a lot of effort for questionable benefits. Given that X64 code can run on arm64 under emulation without too many problems [0], and that the 32-bit ARM procedure call standard is fundamentally incompatible with EBC, the issue lost its urgency somewhat, at least from the side of ARM at the time. [0] https://github.com/ardbiesheuvel/X86EmulatorPkg I wonder whether we should simply drop EBC support? It is unlikely that all the changes that went into EDK2 over the years have not caused a single EBC regression in the library components that are needed to build UEFI drivers that target EBC. Or is this still being used/tested internally at Intel? -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#99979): https://edk2.groups.io/g/devel/message/99979 Mute This Topic: https://groups.io/mt/96855618/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
