hlt

Halting Debug-mode

HLT #<imm>

Enters Halting debug mode.

Pseudocode Operation

BRK(imm16)

Example

HLT #16

Encoding

Binary Layout

11010100

31:24

010

23:21

imm16

20:5

000

4:2

00

1:0

 

Format Exception

Opcode 0xD4400000

Extension Base

Operands

• imm
  ID

Related

Other forms of hlt

• hlt Halting Debug (Thumb)
• hlt Halting Debug (A32)

More in Base

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD4400000	HLT #<imm>		A64		11010100 | 010 | imm16 | 000 | 00

Description

Halt instruction. An HLT instruction can generate a Halt Instruction debug event, which causes entry into Debug state. Within a guarded memory region, while PSTATE.BTYPE != 0b00, a HLT instruction that would cause entry into Debug state will not generate a Branch Target Exception and will cause entry into Debug state as normal. For more information, see PSTATE.BTYPE.

Operation

FaultRecord fault = NoFault();
Halt(DebugHalt_HaltInstruction, FALSE, fault);