ARM VERSION 1.2 - Manual (Page 319)

Directives Reference
ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All rights reserved. 7-37
Example
p PROC ; Canonical frame address is sp + 0
EXPORT p
STMFD sp!,{r4-r6,lr}
; sp has moved relative to the canonical frame address,
; and registers r4, r5, r6 and lr are now on the stack
FRAME PUSH {r4-r6,lr}
; Equivalent to:
; FRAME ADDRESS sp,16 ; 16 bytes in {r4-r6,lr}
; FRAME SAVE {r4-r6,lr},-16
7.5.4 FRAME REGISTER
Use the FRAME REGISTER directive to maintain a record of the locations of function
arguments held in registers. You can only use it within functions with FUNCTION and
ENDFUNC or PROC and ENDP directives.
Syntax
FRAME REGISTER reg1,reg2
where:
reg1 is the register that held the argument on entry to the function.
reg2 is the register in which the value is preserved.
Usage
Use the FRAME REGISTER directive when you use a register to preserve an argument that
was held in a different register on entry to a function.