AMD K manual Potential Effect on System. System failure

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Preliminary Information

AMD Athlon™ Processor Model 4 Revision Guide

23614K —October 2003

22 Using Task Gates With Breakpoints Enabled May Cause Unexpected Faults

Products Affected. A4, A5, A6, A7, A9

Normal Specified Operation. Task gates should correctly use the TSS selector out of the task gate for CALL and JMP instructions.

Non-conformance.When a task gate is used by a CALL or JMP instruction and any debug breakpoint is enabled through the DR7.LE or GE bits, the processor may, under certain timing scenarios, incorrectly use the new TSS base[15:0] contained in the new TSS as a selector. This will most likely cause a GP fault with an error code of the new TSS base.

Potential Effect on System. System failure.

Suggested Workaround. When using software that uses task gates with CALL or JMP instructions, do not enable breakpoints.

Resolution Status. No fix planned.

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Contents Revision Guide Advanced Micro Devices, Inc Revision History AMD Athlon Processor Model 4 Revision GuideAMD Athlon Processor Model Revision Guide Revision Guide PolicyProduct Errata Resolution Status. No fix planned Products Affected. A4, A5, A6, A7, A9Resistance Value of the ZN and ZP Pins Products Affected. A4, A5Potential Effect on System. The system hangs Products Affected. A4, A5, A6, A7 Instruction Execution DeadlockSuggested Workaround. None Potential Effect on System. The system will hang Products Affected. A9 Preliminary Information Resolution Status. No fix planned Preliminary Information Preliminary Information Potential Effect on System. System failure Single Step Across I/O SMI Skips One Debug Trap Software Prefetches May Report a Page Fault Kernel WorkaroundPreliminary Information Revision Determination Technical and Documentation Support
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