FIX: CodeView 4.0 Does Not Step Over Embedded Int 3 (87924)
The information in this article applies to:
- Microsoft CodeView for MS-DOS 4.0
- Microsoft CodeView for MS-DOS 4.01
- Microsoft CodeView for MS-DOS 4.05
- Microsoft CodeView for Windows 4.0
- Microsoft CodeView for Windows 4.01
This article was previously published under Q87924 SYMPTOMS
Microsoft CodeView version 4.0 will not step over an embedded Interrupt 3
instruction. Execution will also stop after pressing F5 for Go, and will
not pass this instruction.
RESOLUTION
You can either step over the Int 3 by changing the value of the IP
register, or use the Assemble command to change the Int 3 instruction.
You can modify the IP register so it points to the instruction immediately
after the Int 3 by modifying the register directly in the register window,
or by using the Rip command.
You can change the Int 3 to a NOP instruction using the Assemble (a)
command as follows
>a XXXX:XXX1
>XXXX:XXX1 nop
>XXXX:XXX2
where XXXX:XXX1 is the address where the Int 3 is located.
STATUS
Microsoft has confirmed this to be a problem in CodeView versions 4.0,
4.01, and 4.05. This problem was corrected in CodeView version 4.1.
MORE INFORMATION
Int 3 is a special debugging interrupt. It is often put in code to create a permanent, or hard breakpoint.
| Modification Type: | Major | Last Reviewed: | 10/23/2003 |
|---|
| Keywords: | kb16bitonly kbfix KB87924 |
|---|
|