ARM DS-5 Getting Started with DS-5 - ARM Information Center

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ARM DS-5 tutorials3.10 Debugging a loadable kernel moduleYou can use DS-5 to develop and debug a loadable kernel module. Loadable modules can bedynamically inserted and removed from a running kernel during development without the needto frequently recompile the kernel.DS-5 provides an example of a simple character device driver, modex.c that you can compile,run, and debug on your target. Pre-built image binaries are provided for Windows users thatmatch the Linux distribution project provided by DS-5. Alternatively, see the readme.htmlprovided with the kernel_module example for more information on how to compile the kerneland the module.3.10.1 PrerequisitesBefore you can debug the module you must ensure that you:• Unpack kernel source code and compile the kernel against exactly the same kernel versionas the target• Compile the loadable module against exactly the same kernel version as the target.NoteEnsure that you compile both images with debug information. The debugger requires run-timeinformation from both images when debugging the module.3.10.2 ProcedureTo debug the loadable module, modex.c:1. Connect the debugger to the target. The device driver example provides a preconfiguredlaunch file:a. Select Debug Configurations... from the Run menu.b. Expand the DS-5 Debugger the configuration tree.c. Select the kernel-module-beagle-example entry.d. The Connection tab contains most of the connection settings with the exception ofthe Debug Hardware Address field. Enter the IP address or name for the connectionbetween the debugger and the debug hardware agent.ARM DUI 0478M Copyright © 2010-2012 ARM. All rights reserved. 3-19ID120712Non-Confidential
ARM DS-5 tutorialsFigure 3-11 Typical connection for a Linux kernel module configuratione. The Files tab contains the debugger settings to load debug information for the Linuxkernel and the module. For this example, ignore the Application on host todownload field and select both the kernel image and the module image as shown inthe following figure.ARM DUI 0478M Copyright © 2010-2012 ARM. All rights reserved. 3-20ID120712Non-Confidential
Page 1 and 2: ®ARMDS-5Version 5.13Getting Starte
Page 3 and 4: ContentsARM DS-5 Getting Started wi
Page 5 and 6: Chapter 1Conventions and feedbackTh
Page 7: Chapter 2ARM DS-5 product overviewT
Page 13 and 14: ARM DS-5 product overview2.6 About
Page 15 and 16: ARM DS-5 product overview2.8 About
Page 17 and 18: ARM DS-5 tutorials3.1 Installing DS
Page 19 and 20: ARM DS-5 tutorials3.2 Importing the
Page 21 and 22: ARM DS-5 tutorials3.4 Building the
Page 23 and 24: ARM DS-5 tutorials3.6 Loading the G
Page 25 and 26: ARM DS-5 tutorialsFigure 3-2 Defini
Page 27 and 28: ARM DS-5 tutorials11. Click Next.12
Page 29 and 30: ARM DS-5 tutorials— Debug Configu
Page 31 and 32: ARM DS-5 tutorials8. In the Files p
Page 33: ARM DS-5 tutorials3.9 Debugging Gno
Page 37 and 38: ARM DS-5 tutorialsNoteWhen you inse
Page 39 and 40: ARM DS-5 tutorials3.11 Performance
Page 41 and 42: ARM DS-5 tutorials3.12 Setting up t
Page 43 and 44: ARM DS-5 tutorials3.13 Loading the
Page 45 and 46: ARM DS-5 tutorialsFigure 3-16 Typic
Page 47 and 48: ARM DS-5 tutorials3.14 Connecting t
Page 49 and 50: ARM DS-5 tutorialsFigure 3-19 Typic
Page 51 and 52: ARM DS-5 tutorials3.15 Managing DS-
Page 53 and 54: ARM DS-5 tutorials3.16 Changing the
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ARM DS-5 Getting Started with DS-5 - ARM Information Center

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