https://gist.github.com/thejpster/1b9f6d92eaa295b03cedea4cc8128f9b is some source code.

`clang --target=thumbv8m.main-none-eabi -o reloc reloc.c -O3 -nostdlib -fropi -frwpi` will build it.

You get functions like:

```text
00020114 <reloc_get>:
   20114: 40 f2 00 00   movw    r0, #0
   20118: c0 f2 00 00   movt    r0, #0
   2011c: 59 f8 00 00   ldr.w   r0, [r9, r0]
   20120: 70 47         bx      lr
```

You can see the load of the global variable is relative to register R9. Now if you add `-g` for debugging, you get an error from the linker:

`ld.lld: error: /tmp/reloc-b5942a.o:(.debug_info+0x31): has non-ABS relocation R_ARM_SBREL32 against symbol 'GLOBAL_VALUE'`