SNP failure when chainloading from U-Boot

[ljfranklin]

Cross-posting from iPXE forum for added visibility

Issue

Using the setup below, I'm trying to chainload iPXE from U-Boot on a small ARM32 board (ODroid MC1). iPXE is able to see the SNP interface with ifstat, but running ifopen net0 shows NETDEV net0 failed to receive 0x0: The socket is not connected and the iPXE shell freezes. Full log is shown here and iPXE config page is here and here.

Any tips for debugging this further? Thanks y'all!

Setup

Board: ODroid MC1
CPU: ARM32 Samsung Exynos5422
iPXE build: bin-arm32-efi/snp.efi with lots of DEBUG enabled, script
iPXE source: latest master but had to disable a couple optional features to avoid freezes, diff
U-Boot build: script

[mcb30]

I note that you have added -mno-unaligned-access to your build flags. iPXE (along with UEFI) requires that unaligned accesses are permitted. There will be code within iPXE that assumes it is safe to take the address of a packed structure member, thereby producing a pointer that the compiler will subsequently treat as aligned.

[NiKiZe]

From what I can understand from http://u-boot.10912.n7.nabble.com/PATCH-arm-enable-unaligned-access-on-ARMv7-td126385.html this issue is resolved in u-boot?