linux-armv7/linux-armv7-chromebook kexec failure

[Melab]

On a Samsung XE303C12 running Linux 4.12.0-1-ARCH, this is what happens when attempting load a kernel with kexec:
$this->bbcode_second_pass_code('', '$ kexec --load /boot/zImage --type zImage --dtb=/boot/dtbs/exynos5250-snow.dtb --command-line="console=tty0 init=/sbin/init root=/dev/mmcblk1p3"
kexec_load failed: Invalid argument
entry = 0x40008000 flags = 0x280000
nr_segments = 2
segment[0].buf = 0xb68ba008
segment[0].bufsz = 0x5995e8
segment[0].mem = 0x40008000
segment[0].memsz = 0x59a000
segment[1].buf = 0x359cb0
segment[1].bufsz = 0xfa57
segment[1].mem = 0x41c08000
segment[1].memsz = 0x10000')