Common-thread inter-process function calls invoked by jumps to invalid addresses
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United States of America Patent
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-
Jan 16, 2001
Grant Date -
N/A
app pub date -
May 6, 1997
filing date -
May 6, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention includes a method of making a call from one process to another. The method includes executing a jump instruction from a first process, while specifying an invalid destination address such as an odd virtual memory address. The invalid address causes a memory fault, which in turn results in the invocation of a memory fault handler. The memory fault handler is configured to recognize certain specified invalid addresses, and to call different system functions depending on the particular values of the addresses. The thread of the calling process is used to execute both the fault handler and the called system functions.
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