Single-stepping a Program | HP Ski Simulator, IA-64 guide

Ski IA-64 Simulator Reference Manual 1.0L

Figure 1-16. The Terminal Window After the “ hello” Program is Run

Figure 1-17. The xski Main Window after the “ hello” Program is Run

1.2.10Single-stepping a Program

To try single-stepping (and no, this is not a kind of ethnic dance), set a breakpoint at main+10. Then use the “ run” com- mand or Run button to simulate the program up to the breakpoint. (If you receive the error message “ Nothing to run”, stop and reread the last sentence in the previous paragraph.) Ski stops at the breakpoint and notiﬁes you with a message in

1-12 Getting Started: A Ski Tutorial

Copyright © 2000 Hewlett-Packard Co.

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HP Ski Simulator, IA-64 manual Single-stepping a Program, The Terminal Window After the hello Program is Run

Contents

Ski IA-64 Simulator Reference Manual Copyright 2000 Hewlett-Packard Co Printing History Trademarks How to Use This Manual PrefaceFont Conventions Syntax Conventions Italic+ Table of Contents Ski IA-64 Simulator Reference Manual Vii Ski IA-64 Simulator Reference Manual Viii Table of Contents List of Figures Ski IA-64 Simulator Reference Manual 1.0L List of Tables Ski IA-64 Simulator Reference Manual 1.0L Xii List of Tables How to Run an IA-64 Application Program Getting Started a Ski TutorialSki Simulator Starting xski Starting xski From the Command Line Exiting Ski Loading Your Program Loading the hello Program Inspecting Data Xski Data Window Changing the Data Window Display Data Window Showing argv and envp Strings in Hexadecimal Viewing Data in Ascii Looking at Code Viewing Source Code Mixed In with Assembly Code 12. Jumping the Program Window to the Beginning of main Controlling Breakpoints 14. The Program Window Showing a Breakpoint at main Running a Program 15. The Breakpoint List Window Single-stepping a Program 16. The Terminal Window After the hello Program is Run Changing Registers and Memory 18. The Main Window After Reaching the Breakpoint at main+10 Ski IA-64 Simulator Reference Manual 1.0L 20. The xski Register Window After Changing the ip Register 21. The xski Data Window Widened to Show Ascii Getting Help Next Steps Copyright 2000 Hewlett-Packard Co Overview IntroductionWhat You Need to Know to Use This Manual Defects and Defect Reporting Using bski for Batch Simulations Ski Variations X Window System, Motif-based xski Interface Command Line Flags Starting Ski XSki File 1.1 Summary of Flags Summary of the Quit Command Quitting SkiQuit expression Screen Presentation Ski’s Use of WindowsRegister Window User Registers Pane Register Window in xski General Registers Pane Floating Point Registers Pane System Registers Pane IA-32 Registers Pane Resizing Register Window Panes with xski Register Window and ski Program Window 1 IA-64 Instruction Display Ski IA-64 Simulator Reference Manual 1.0L 2 IA-32 Instruction Display Changing the Range of Locations Shown in the Program Window Invalid Code and the Program Window Data Window 12. xski’s Program Window Showing Illegal Instructions Changing the Range of Locations Shown in the Data Window Command/Main Window Invalid Code and the Data WindowXski Main Window Ski Command Window 16. xski’s Main Command Window 17. ski’s Command Window at Bottom Other Windows 18. xski’s Symbol List Window Copyright 2000 Hewlett-Packard Co Command Language Command EntryCommand Arguments Command Sequences, Repetition, and Abbreviation Argument Speciﬁcation Numeric ArgumentsNumbers and Counts Expressions Ski Simulator Arithmetic and Logic Operators Xski Evaluating Expressions Symbolic Arguments Program-Deﬁned SymbolsAddresses Resolving Ambiguous Symbols and Numbers Internal VariablesLabels Filenames Ski IA-64 Simulator Reference Manual 1.0L Screen Manipulation Commands Register Window CommandsSummary of Register Window Commands Xski Register Window Commands Program Window Commands Summary of Program Window Commands Xski’s Program Window Showing IA-64 Assembly Language Code Xski’s Assembly Language Dump Window Pd startingaddress endingaddress ﬁlename Data Window Commands Summary of Data Window CommandsDj address Df count Xski Showing Data in Raw Hexadecimal and Ascii Dd startingaddress endingaddress ﬁlename Program Simulation Application-Mode and System-Mode SimulationSki Support for Application-Mode Programs Ski Support for System-Mode Programs Summary of TLB Display Commands System-Mode IA-64 ProgramsSystem-Mode IA-32 Programs System-Mode TLB Simulation Misaligned Data Access Trap How to Load a ProgramProgram Loading Summary of Program Loading Commands Load ﬁlename args+Adding Information after Loading Creating the argc, argv, and envp Parameters Summary of Program Execution Commands Program Execution Ski IA-64 Simulator Reference Manual 1.0L Program Simulation Linux and MS-DOS ABI Emulation InterruptionsLinux Application Environment Linux System Calls Supported by Ski Linux System Calls Accepted but Ignored by Ski MS-DOS Application Environment Program I/OMS-DOS System Calls in Hexadecimal Supported by Ski Copyright 2000 Hewlett-Packard Co Changing Registers and Memory with Assignment Commands Summary of Assignment CommandsExamples of Assignment Commands Debugging Original Program Loaded in ski Bit-encoded Registers Allocation Summary of The eval Command Setting Program BreakpointsEvaluating Formulas and Formatting Data Program Breakpoints Deleting Program Breakpoints Listing Program Breakpoints Summary of Program Breakpoint Commands Unexpected BreakpointsBs address Setting Data Breakpoints Summary of Data Breakpoint CommandsData Breakpoints Deleting Data Breakpoints Symbol Table Commands Summary of Save and Restore CommandsSummary of Symbol Commands Dumping Registers and Memory to a File Symlist Output from xski Isyms ﬁlename Ski IA-64 Simulator Reference Manual 1.0L Debugging Command Files Labels and Control Flow in Command FilesGoto Command and Labels Initialization File Comments in Command Files An Example Command FileIf Command Summary of Command File Commands ﬁlename# comment Label Ski IA-64 Simulator Reference Manual 1.0L Command Files Command Reference =s address stringwithoutspaces Dbs address length rwrw Dbd breakpointnumber Help commandname Eval expressionwithoutspaces+ Quit returnvalueforshell Rest ﬁlename Step until expressionwithoutspaces Ski IA-64 Simulator Reference Manual 1.0L Register Names IA-64 Registers Register Names Copyright 2000 Hewlett-Packard Co Register Names B-3 Ski IA-64 Simulator Reference Manual 1.0L Copyright 2000 Hewlett-Packard Co Register Names B-5 Ski IA-64 Simulator Reference Manual 1.0L Register Names Internal Variable Names Internal Variables Copyright 2000 Hewlett-Packard Co Simulator Status and Error Messages All breakpoints deleted Simulator Status and Error Messages Expression Help Unknown command %s Missing ELF header Not an IA-64 ﬁle Stopping at %s due to unimplemented instruction Usage %s options ﬁle args