9.1.3.3 Relocations

Relocations for MOVZ and MOVK instructions can be generated by prefixing the label with #:abs_g2: etc. For example to load the 48-bit absolute address of foo into x0:

        movz x0, #:abs_g2:foo         // bits 32-47, overflow check
        movk x0, #:abs_g1_nc:foo        // bits 16-31, no overflow check
        movk x0, #:abs_g0_nc:foo        // bits  0-15, no overflow check

Relocations for ADRP, and ADD, LDR or STR instructions can be generated by prefixing the label with :pg_hi21: and #:lo12: respectively.

For example to use 33-bit (+/-4GB) pc-relative addressing to load the address of foo into x0:

        adrp x0, :pg_hi21:foo
        add  x0, x0, #:lo12:foo

Or to load the value of foo into x0:

        adrp x0, :pg_hi21:foo
        ldr  x0, [x0, #:lo12:foo]

Note that :pg_hi21: is optional.

        adrp x0, foo

is equivalent to

        adrp x0, :pg_hi21:foo