In ARMv6T2 and later, both ARM and Thumb instruction sets include:

You can use these two instructions to construct any 32-bit immediate value in a register. Alternatively, you can use the MOV32 pseudo-instruction. The assembler generates the MOV, MOVT instruction pair for you.

You can also use the MOV32 instruction to load addresses into registers by using a label or any PC-relative expression in place of an immediate value. The assembler puts a relocation directive into the object file for the linker to resolve the address at link-time.