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ARMDebug update: Singlestepping, OS trapping, memory editing wonder By Chris Williams. Published: 15th Dec 13:51:35 | Permalink | Printable
Firstly no, it's not a pesticide. It is not a nasty programmer-esque application either. ARMDebug is a freeware machine code disassembler with a very useful addition, the ability to single-step through your programs instruction by instruction and set conditional breakpoints along critical code areas. The full features list is includes..
- RISC OS 4 compatible
- ARMDebug can single/multistepper through code with full step recording facilities
- You can place conditional breakpoints in applications and ram modules
- SWI calls can be conditionally interrupted before and after execution
- OS commands can be tracked and trapped
- Memory editor
- Investigate and modify memory allocations and ram modules
- ARMDebug provides *Step and SWI "OS_BreakAddress" calls
Using ARMDebug, you can place conditional breakpoints in applications and rammodules. Breakpoints can be defined so that if one is encountered, the values from the registers, flags and memory can be altered and the singlestep mode can be activated there and then. This on-the-spot debugging preserves processor registers, flags and PC counter for a smooth and transparent return. After hearing of this promising coding tool, we spoke to Theo Boogaert, ARMDebug's author.
"I wrote ARMDebug for helping me to adjust applications, games, modules etc." Apparently, ARMDebug was first developed on Theo's BBC microcomputer before being moved to the RISC OS platform many, many moons ago. Since then Theo has continually developed the debugger, this latest release was prompted by the author's upgrade to RISC OS 4, which clashed with ARM Debug.
"I use the latest version almost every day, it is very stable and it does all the things that I need", enthused Theo before admitting the debugger is missing two minor ARM instructions and a detailed manual. Don't let this put you off though, Theo is aiming to polish off ARM Debug before too long and he is willing to implement any requested features.
Theo's web site also includes an extensive compilation of patches written to enable older games to run on newer RISC OS machines, including a patch for this Drobe editor's all time favourite Quark.
Contacts
ARM Debug: www.vd-boogaert.myweb.nl
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