Intel IA-32 Manual De Usuario
Vol. 3A 5-3
INTERRUPT AND EXCEPTION HANDLING
Table 5-1. Protected-Mode Exceptions and Interrupts
Vector
No.
No.
Mne-
monic
monic
Description
Type
Error
Code
Code
Source
0
#DE
Divide Error
Fault
No
DIV and IDIV instructions.
1
#DB
RESERVED
Fault/
Trap
No
For Intel use only.
2
—
NMI Interrupt
Interrupt
No
Nonmaskable external interrupt.
3
#BP
Breakpoint
Trap
No
INT 3 instruction.
4
#OF
Overflow
Trap
No
INTO instruction.
5
#BR
BOUND Range Exceeded
Fault
No
BOUND instruction.
6
#UD
Invalid Opcode (Undefined
Opcode)
Fault
No
UD2 instruction or reserved
opcode.
opcode.
1
7
#NM
Device Not Available (No
Math Coprocessor)
Fault
No
Floating-point or WAIT/FWAIT
instruction.
8
#DF
Double Fault
Abort
Yes
(zero)
Any instruction that can generate
an exception, an NMI, or an
INTR.
9
Coprocessor Segment
Overrun (reserved)
Fault
No
Floating-point instruction.
2
10
#TS
Invalid TSS
Fault
Yes
Task switch or TSS access.
11
#NP
Segment Not Present
Fault
Yes
Loading segment registers or
accessing system segments.
12
#SS
Stack-Segment Fault
Fault
Yes
Stack operations and SS register
loads.
13
#GP
General Protection
Fault
Yes
Any memory reference and other
protection checks.
14
#PF
Page Fault
Fault
Yes
Any memory reference.
15
—
(Intel reserved. Do not use.)
No
16
#MF
x87 FPU Floating-Point
Error (Math Fault)
Fault
No
x87 FPU floating-point or
WAIT/FWAIT instruction.
17
#AC
Alignment Check
Fault
Yes
(Zero)
Any data reference in memory.
3
18
#MC
Machine Check
Abort
No
Error codes (if any) and source
are model dependent.
are model dependent.
4
19
#XF
SIMD Floating-Point
Exception
Fault
No
SSE/SSE2/SSE3 floating-point
instructions
instructions
5
20-31
—
Intel reserved. Do not use.
32-255
—
User Defined (Non-
reserved) Interrupts
Interrupt
External interrupt or INT n
instruction.
NOTES:
1. The UD2 instruction was introduced in the Pentium Pro processor.
2. IA-32 processors after the Intel386 processor do not generate this exception.
3. This exception was introduced in the Intel486 processor.
4. This exception was introduced in the Pentium processor and enhanced in the P6 family processors.
5. This exception was introduced in the Pentium III processor.
1. The UD2 instruction was introduced in the Pentium Pro processor.
2. IA-32 processors after the Intel386 processor do not generate this exception.
3. This exception was introduced in the Intel486 processor.
4. This exception was introduced in the Pentium processor and enhanced in the P6 family processors.
5. This exception was introduced in the Pentium III processor.