RealView Compiler User's Guide
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RealView Compiler User's Guide

Getting started with the ARM Compiler

Compiler Features

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Diagnostic Messages

Using the Inline and Embedded Assemblers

About semihosting

What is semihosting?

The semihosting interface

Semihosting implementation

RealView ARMulator ISS

Instruction Set System Model

Semihosting operations

angel_SWIreason_EnterSVC (0x17)

angel_SWIreason_ReportException (0x18)

SYS_CLOSE (0x02)

SYS_CLOCK (0x10)

SYS_ELAPSED (0x30)

SYS_ERRNO (0x13)

SYS_FLEN (0x0C)

SYS_GET_CMDLINE (0x15)

SYS_HEAPINFO (0x16)

SYS_ISERROR (0x08)

SYS_ISTTY (0x09)

SYS_OPEN (0x01)

SYS_READ (0x06)

SYS_READC (0x07)

SYS_REMOVE (0x0E)

SYS_RENAME (0x0F)

SYS_SEEK (0x0A)

SYS_SYSTEM (0x12)

SYS_TICKFREQ (0x31)

SYS_TIME (0x11)

SYS_TMPNAM (0x0D)

SYS_WRITE (0x05)

SYS_WRITEC (0x03)

SYS_WRITE0 (0x04)

Debug agent interaction SVCs

SYS_ELAPSED (0x30)

RealView^® Compilation Tools for μVision Compiler User Guide

Version 3.1

Home > Semihosting > Semihosting operations > SYS_ELAPSED (0x30)

A.3.5. `SYS_ELAPSED (0x30)`

Returns the number of elapsed target ticks since execution started. Use SYS_TICKFREQ to determine the tick frequency.

Entry

On entry, r1 points to a two‑word data block to be used for returning the number of elapsed ticks:

word 1: The least significant word in the doubleword value.
word 2: The most significant word.

Return

On exit:

r0 contains –1 if r1 does point to a doubleword containing the number of elapsed ticks. RealView ICE does not support this SVC and always return –1 in r0.
r1 points to a doubleword, low‑order word first, that contains the number of elapsed ticks.

Copyright © 2007 ARM Limited. All rights reserved.	ARM DUI 0375A
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