This is a collection of Intel®’ IA32® Software Developer's Manuals (URL of the day) and AMD' AMD64 Architecture Programmer's Manual together with the related specifications, application notes, white papers, and change logs. The collection aims to keep all available revisions. It was originally created by Michal Necasek, see OS/2 Museum.

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DCPS2

Debug Change PE State to EL2 allows the debugger to move the PE into EL2 from a lower Exception level.

DCPS2 is UNDEFINED if any of:

• The PE is in Non-debug state.
• EL2 is not implemented.
• The PE is in Secure state and any of:
  • Secure EL2 is not implemented.
  • Secure EL2 is implemented and Secure EL2 is disabled.

When the PE executes DCPS2:

• If EL2 is using AArch32, the PE enters Hyp mode and ELR_hyp, HSR, SPSR_hyp, DLR and DSPSR become UNKNOWN.
• If EL2 is using AArch64, the PE enters EL2 using AArch64, selects SP_EL2, and ELR_EL2, ESR_EL2, SPSR_EL2, DLR_EL0 and DSPSR_EL0 become UNKNOWN.

For more information on the operation of the DCPS<n> instructions, see DCPS.

T1

Decode for this encoding

if !HaveEL(EL2) then Undefined(); end;