Well... as you probably know, Nasm will condescend to do a shift on the difference between two labels. The usual construct is something like:
dw (int3 - $$) >> 16
where $$ refers to the beginning of the section. This calculates the "file offset". This is probably not the value you want to shift.
dw (int3 - $$ + ORIGIN) >> 16
may do what you want... where ORIGIN is... well, what we told Nasm for org, if we were using flat binary. I ASSume you're assembling to -f elf32 or -f elf64, telling ld --oformat=binary, and telling ld either in a linker script or on the command line where you want .text to be (?). This seems to work.
I made an interesting discovery: if you tell ld -oformat=binary (one hyphen) instead of --oformat=binary (two hyphens), ld silently outputs nothing! Don't do this - you waste a lot of time!
