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Inside Macintosh: Memory /

Chapter 3 - Virtual Memory Manager / Virtual Memory Manager Reference

Routines / Virtual Memory Debugger Support Routines

PageFaultFatal

A debugger can use the PageFaultFatal function to determine whether it should capture all bus errors or whether it is safe to allow them to flow through to virtual memory. When paging is safe, the debugger can allow virtual memory to continue servicing page faults, and the user can view all of memory.

FUNCTION PageFaultFatal: Boolean;

DESCRIPTION

The PageFaultFatal function returns TRUE if the debugger should not allow the virtual memory's bus-error handler to detect any page faults.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the PageFaultFatal function are

Trap macro	Selector
_DebugUtil	$0005

The registers on entry and exit for this routine are

Registers on entry
D0	Selector code

Registers on exit
D0	Returned value