flashing arbitrary binary

[emard]

user wants to flash arbitrary binary to skip IDCODE check
intended use is ext3 linux filesystem to flash

but renaming to IMG didn't help

lawrie@lawrie-VirtualBox:~/SaxonSocDev/hardware/synthesis/ulx3s$ ujprog -j flash -f 0x100000 blink.img
ULX2S / ULX3S JTAG programmer v 3.0.92 (built Oct 21 2019 02:00:13)
Using USB cable: ULX3S FPGA 12K v3.0.3
Programming: 69% | double free or corruption (!prev)
Aborted (core dumped)