When LTO is enabled, linker may relocate literal pools out of Thumb LDR
instruction's reach causing "offset out of range" errors while linking.
This commit adds `.ltorg` directive in the inline asm blocks where absolute
addresses are loaded using the `ldr` instructions, in order to ensure that
the literal pool containing the absolute addresses are placed near the
`ldr` instructions.
Note that the `.ltorg` directive is recognised by all toolchains supported
by Zephyr and no toolchain abstraction is provided for now.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
Stephanos Ioannidis
d7d3ae5c3b