The CODE32 directive instructs the assembler
to interpret subsequent instructions as 32-bit ARM instructions.
The syntax of CODE32 is:
CODE32
Use CODE32 to when branching to ARMstate from
Thumb state. CODE32 precedes code at the destination
of the branch.
The assembler inserts up to three bytes of padding, if necessary,
to bring following ARM code into word alignment. CODE32 does
not assemble to an instruction that changes the mode. It only instructs
the assembler to assemble ARM instructions.
See also CODE16 directive.
CODE16 ; Start this area in Thumb state
AREA ThumbEx, CODE, READONLY
MOV r1,#10 ; Thumb instructions
ADR r0,goarm ; Load the address and leave the
; least significant bit clear.
BX r0 ; Branch and exchange instruction
; sets
; Not necessarily in the same area
CODE32 ; Following instructions are ARM
goarm MOV r4,#15 ; ARM instructions
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