tc (Trace to Next Call)

The tc command executes the program until a call instruction is reached.


[~Thread] tc [r] [= StartAddress] [Count] 


tc [r] [= StartAddress] [Count] 


Specifies threads to continue executing. All other threads are frozen. For more information about the syntax, see Thread Syntax. You can specify threads only in user mode.

Turns on and off the display of registers and flags. By default, the registers and flags are displayed. You can disable register display by using the tcr, pr, tr, or .prompt_allow -reg commands. All of these commands control the same setting and you can use any of them to override any previous use of these commands.

You can also disable register display by using the l-os command. This setting is separate from the other four commands. To control which registers and flags are displayed, use the rm (Register Mask) command.

Specifies the address where the debugger begins execution. If you do not use StartAddress, execution begins at the instruction that the instruction pointer points to. For more information about the syntax, see Address and Address Range Syntax.

Specifies the number of call instructions that the debugger must encounter for the tc command to end. The default value is one.



User mode, kernel mode


Live debugging only



Additional Information

For more information about related commands, see Controlling the Target.


The tc command causes the target to begin executing. This execution continues until the debugger reaches a call instruction or encounters a breakpoint.

If the program counter is already on a call instruction, the debugger traces into the call and continues executing until it encounters another call. This tracing, rather than execution, of the call is the only difference between tc and pc (Step to Next Call).

In source mode, you can associate one source line with multiple assembly instructions. This command does not stop at a call instruction that is associated with the current source line.