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

adb: Program Debugger XENIX Programming
If no address is given, then the start of the program is used. Thus, to execute the
program from the beginning, type
: r
If a count is given, adb will ignore all breakpoints until the given number have been
encountered. For example, the command
,S:r
causes adb to skip the first five breakpoints.
If arguments are given, they must be separated by at least one space each. The
arguments are passed to the program in the same way the system shell passes command
line arguments to a program. You may use the shell redirection symbols if you wish.
The :R command passes the command arguments through the shell before starting
program execution. This means you can use shell metacharacters in the arguments to
refer to multiple files or other input values. The shell expands arguments containing
metacharacters before passing them on to the program.
The command is especially useful if the program expects multiple file names. For
example, the command
:R [a-z]*.s
passes the argument "[a-z]* .s" to the shell, where it is expanded to a list of the
corresponding file names before being passed to the program.
The :r and :R commands remove the contents of all registers and destroy the current
stack before starting the program. This kills any previous copy of the program you may
have been running.
Setting Breakpoints
You can set a breakpoint in a program by using the :br com mand. Breakpoints cause
execution of the program to stop when it reaches the specified address. Control then
returns to adb. The command has the form
address [, count ] :br command
where address is a valid instruction address, count is a count of the number of times you
wish the breakpoint to be skipped before it causes the program to stop, and command is
the adb command you wish to execute when the breakpoint is taken.
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