Exception handling utilizing call instruction with context information
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United States of America Patent
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Sep 11, 2001
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N/A
app pub date -
Sep 29, 1998
filing date -
Sep 29, 1998
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Abstract
In-code context data used for exception handling is incorporated into a special call instruction which is recognized by the processor. The information is skipped at the time of the function call and read at the time of the stack unwinding. This special call instruction may be implemented to run at no extra cycle costs compared to normal instructions, except for the external execution time dependencies from such machinery as a cache involved in the instruction fetching, since it would never be necessary during normal execution to actually access the information. The information is only accessed during exception handling.
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