Attach the pseudo interrupt handler that the instrumented module uses
#include <sys/neutrino.h> int InterruptHookTrace( const struct sigevent * (* handler)(int), unsigned flags );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The InterruptHookTrace() kernel call attaches the pseudo interrupt handler handle that the instrumented module uses.
|This function requires the instrumented kernel. For more information, see the System Analysis Toolkit (SAT) User's Guide.
Before calling this function, the thread must request I/O privileges by calling:
ThreadCtl( _NTO_TCTL_IO, 0 );
The handler argument specifies the pseudo interrupt handler that receives trace events from the kernel. The integer that's passed to the handler is a combination of the buffer index and the sequence number; to extract each part, pass the integer to the _TRACE_GET_BUFFNUM() and _TRACE_GET_BUFFSEQ() macros defined in <sys/trace.h>.
The interrupt structure allows trace interrupts to be shared. For example, if two processes take over the same trace interrupt, both handlers are invoked consecutively. When a handler attaches, it's placed in front of any existing handlers for that interrupt and is called first. This behavior can be changed by setting the _NTO_INTR_FLAGS_END flag in the flags argument. This adds the handler at the end of any existing handlers.
This call doesn't block.
An interrupt function ID, or -1 if an error occurs (errno is set).
Writing an Interrupt Handler chapter of the Neutrino Programmer's Guide
System Analysis Toolkit (SAT) User's Guide