Intel XENIX 286 Programmers Guide (86) - Tenox.tc

adb: Program Debugger XENIX Programming
You can use similar commands for the g and h functions. Once you have created the
breakpoints, you can display their locations by typing
$b
This command lists the address, optional count, and optional command associated with
each breakpoint. In this case, the command displays
breakpoints
count bkpt command
1 f
g
- h
The next step is to display the first five instructions in the f function. Type
f,S?ia
This command displays five instructions, each preceded by its symbolic address. The
instructions in 8086/286 mnemonics are
f: push bp
-
f + 1.: mov bp,sp
- f+3.: push di
- f +4.: push si
- f + 5.: call chkstk
-
f+B.:
You can display five instructions in g without their addresses by typing
g,S?i
In this case, the display is
-
g: push bp
mov bp,sp
push di
push si
call chkstk
To start program execution, type
: r
adb displays the message
sample: running
and begins to execute. As soon as adb encounters the first breakpoint (at the beginning
of function f), it stops execution and displays the message
6-20
breakpoint f: push bp