Exceptionpoint Debugger Commands¶
- epset
sets a new exceptionpoint
- epclear
clears a specific exceptionpoint or all exceptionpoints
- epdisable
disables a specific exceptionpoint or all exceptionpoints
- epenable
enables a specific exceptionpoint or all exceptionpoints
- eplist
lists exceptionpoints
Exceptionpoints halt execution and activate the debugger when a CPU raises a particular exception number.
epset¶
ep[set] <type>[,<condition>[,<action>]]
Sets a new exceptionpoint for exceptions of type <type>. The
optional <condition> parameter lets you specify an expression that
will be evaluated each time the exceptionpoint is hit. If the result
of the expression is true (non-zero), the exceptionpoint will actually
halt execution at the start of the exception handler; otherwise,
execution will continue with no notification. The optional <action>
parameter provides a command that is executed whenever the
exceptionpoint is hit and the <condition> is true. Note that you
may need to embed the action within braces { }
in order to prevent
commas and semicolons from being interpreted as applying to the
epset
command itself.
The numbering of exceptions depends upon the CPU type. Causes of exceptions may include internally or externally vectored interrupts, errors occurring within instructions and system calls.
Each exceptionpoint that is set is assigned an index which can be used in other exceptionpoint commands to reference this exceptionpoint.
Examples:
ep 2
Set an exception that will halt execution whenever the visible CPU raises exception number 2.
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epclear¶
epclear [<epnum>[,…]]
The epclear command clears exceptionpoints. If <epnum> is specified, only the requested exceptionpoints are cleared, otherwise all exceptionpoints are cleared.
Examples:
epclear 3
Clear exceptionpoint index 3.
epclear
Clear all exceptionpoints.
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epdisable¶
epdisable [<epnum>[,…]]
The epdisable command disables exceptionpoints. If <epnum> is specified, only the requested exceptionpoints are disabled, otherwise all exceptionpoints are disabled. Note that disabling an exceptionpoint does not delete it, it just temporarily marks the exceptionpoint as inactive.
Examples:
epdisable 3
Disable exceptionpoint index 3.
epdisable
Disable all exceptionpoints.
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epenable¶
epenable [<epnum>[,…]]
The epenable command enables exceptionpoints. If <epnum> is specified, only the requested exceptionpoints are enabled, otherwise all exceptionpoints are enabled.
Examples:
epenable 3
Enable exceptionpoint index 3.
epenable
Enable all exceptionpoints.
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eplist¶
eplist
The eplist command lists all the current exceptionpoints, along with their index and any conditions or actions attached to them.
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