Booting from ROM crashes after ipxe.iso runs with timeout

[farpoint]

The issue is first posted here, it hasn't been discussed elsewhere. The problem happens with the latest ipxe.iso and pxe-e1000.rom built from the project, it also happens with pxe ROMs which are supplied as part of QEMU. It also happens with older versions of ipxe.iso images. From my recent attempt to debug the issue, the crash happens inside install_prealloc function, somewhere nearby the code displaying progress of ".text16.late".

The problem manifests itself only when ipxe.iso runs first, timeouts and eventually the boot loader runs the pxe rom code. Without ipxe.iso or when pxe rom is not found, no crashes were observed : the system reboots as expected and the cycle is repeated.