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Directives Reference
7-42 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
7.5.9 FUNCTION or PROC
The
FUNCTION
directive marks the start of an ATPCS-conforming function.
PROC
is a
synonym for
FUNCTION
.
Syntax
label FUNCTION
Usage
Use
FUNCTION
to mark the start of functions. The assembler uses
FUNCTION
to identify the
start of a function when producing DWARF call frame information for ELF.
FUNCTION
sets the canonical frame address to be sp, and the frame state stack to be empty.
Each
FUNCTION
directive must have a matching
ENDFUNC
directive. You must not nest
FUNCTION
/
ENDFUNC
pairs, and they must not contain
PROC
or
ENDP
directives.
See also FRAME ADDRESS on page 7-34 to FRAME STATE RESTORE on page 7-41.
Example
dadd FUNCTION
EXPORT dadd
STMFD sp!,{r4-r6,lr}
FRAME PUSH {r4-r6,lr}
; subroutine body
LDMFD sp!,{r4-r6,pc}
ENDFUNC