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RealView Assembler User's Guide
Preface Introduction Writing ARM Assembly Language
Introduction Overview of the ARM architecture Architecture versions ARM, Thumb, Thumb‑2, and Thumb‑2EE instruction ARM, Thumb, and ThumbEE state Processor mode Registers Instruction set overview Instruction capabilities Structure of assembly language modules Layout of assembly language source files An example ARM assembly language module Calling subroutines Conditional execution The ALU status flags Conditional execution Using conditional execution Example of the use of conditional execution The Q flag Loading constants into registers Direct loading with MOV and MVN Loading with MOV32 Loading with LDR Rd, =const Loading addresses into registers Direct loading with ADR and ADRL Loading addresses with LDR Rd, =label Load and store multiple register instructions Load and store multiple instructions available in Implementing stacks with LDM and STM Block copy with LDM and STM Using macros Test‑and‑branch macro example Unsigned integer division macro example Using frame directives Assembly language changes Assembler Reference ARM and Thumb Instructions Directives ReferenceUsing frame directives
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| Home > Writing ARM Assembly Language > Using frame directives | |||
You must use frame directives to describe the way that your code uses the stack if you want to be able to do either of the following:
debug your application using stack unwinding
use either flat or call‑graph profiling.
See Frame directives for details of these directives.
The assembler uses frame directives to insert DWARF debug frame information into the object file that it produces. This information is required by a debugger for stack unwinding and for profiling. See the Procedure Call Standard for the ARM Architecture specification, aapcs.pdf, on the ARM website for more information about stack checking qualifiers.
Be aware of the following:
Frame directives do not affect the code produced by the assembler.
The assembler does not validate the information in frame directives against the instructions emitted.
| Copyright © 2007 ARM Limited. All rights reserved. | ARM DUI 0379A |
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