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- Title: ZPP
- Author: Alun Jones <auj@aber.ac.uk>
- Version: 1.00
- Title From: Documentation
- Author From: Documentation
- Version From: Documentation
- Supplier: Alun Jones <auj@aber.ac.uk>
- Date: 22/04/96
- Keywords: Memory management software
- Shareware: No
- Machine: Archimedes
- Operating system: RISCOS
- Memory requirements:
- Peripherals needed:
- Other s/ware needed:
- Directory: micros/arch/riscos/e099
- Date mounted/updated: 31/05/96
- File names: zpp.zip
- Unarchived files: 3
- Unarchived size: 2 kbytes
- Omissions:
- See also:
-
- -------------------------------------------------------------------------------
-
- Acquiring the package:
-
- Download the archive file(s) and extract using SparkPlug 2
- (see the "tools_help" file in micros/arch/riscos/tools for further info).
-
-
- Description:
-
- Zpp is a simple utility which alters the MEMC mappings on ARM 2xx and 3xx
- machines to prevent user-mode writes to locations less than 0x8000. Well-
- behaved programs shouldn't write here, and all OS routines which write to
- these locations do so in privileged modes. ZPP prevents (for example) NULL
- pointer dereferences from crashing the machine. Rather, they cause an
- address exception and a stack backtrace in the guilty program.
-