Specific data relocations can be generated by putting the relocation name in parentheses after the symbol name. For example:
.word foo(TARGET1)
This will generate an ‘R_ARM_TARGET1’ relocation against the symbol
foo.
The following relocations are supported:
GOT,
GOTOFF,
TARGET1,
TARGET2,
SBREL,
TLSGD,
TLSLDM,
TLSLDO,
TLSDESC,
TLSCALL,
GOTTPOFF,
GOT_PREL
and
TPOFF.
For compatibility with older toolchains the assembler also accepts
(PLT) after branch targets. On legacy targets this will
generate the deprecated ‘R_ARM_PLT32’ relocation. On EABI
targets it will encode either the ‘R_ARM_CALL’ or
‘R_ARM_JUMP24’ relocation, as appropriate.
Relocations for ‘MOVW’ and ‘MOVT’ instructions can be generated by prefixing the value with ‘#:lower16:’ and ‘#:upper16’ respectively. For example to load the 32-bit address of foo into r0:
MOVW r0, #:lower16:foo
MOVT r0, #:upper16:foo
Relocations ‘R_ARM_THM_ALU_ABS_G0_NC’, ‘R_ARM_THM_ALU_ABS_G1_NC’, ‘R_ARM_THM_ALU_ABS_G2_NC’ and ‘R_ARM_THM_ALU_ABS_G3_NC’ can be generated by prefixing the value with ‘#:lower0_7:#’, ‘#:lower8_15:#’, ‘#:upper0_7:#’ and ‘#:upper8_15:#’ respectively. For example to load the 32-bit address of foo into r0:
MOVS r0, #:upper8_15:#foo
LSLS r0, r0, #8
ADDS r0, #:upper0_7:#foo
LSLS r0, r0, #8
ADDS r0, #:lower8_15:#foo
LSLS r0, r0, #8
ADDS r0, #:lower0_7:#foo