dbg

Debug Hint (Thumb)

DBG #<option>

Debug hint (Thumb).

Pseudocode Operation

// Debug hint - architecturally NOP
// Debugger may act on option field
PC ← PC + instruction_length

Example

DBG #option

Encoding

Binary Layout

111100111010

31:20

1

19

1

18

1

17

1

16

10

15:14

0

13

0

12

0

11

000

10:8

1111

7:4

option

3:0

 

Format Thumb System

Opcode 0xF3AF80F0

Extension T32 (Base)

Operands

• option
  Opt

Related

Other forms of dbg

• dbg Debug Hint

More in T32 (Base)

Reference

View in Arm A64 ISA Reference ↗ Arm AArch32 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x0320F0F0	DBG{<c>}{<q>} #<option>		A32		cond | 00110 | 0 | 10 | 00 | 00 | 1 | 1 | 1 | 1 | 00001111 | option
0xF3AF80F0	DBG{<c>}{<q>} #<option>		T32		111100111010 | 1 | 1 | 1 | 1 | 10 | 0 | 0 | 0 | 000 | 1111 | option

Description

DBG executes as a NOP. Arm deprecates any use of the DBG instruction.

Operation

if ConditionPassed() then
    EncodingSpecificOperations();