step
The step command allows sequential analysis of program instructions by causing
the emulation processor to execute a specified number of assembly instructions or
source lines.
You can display the contents of the processor registers, trace memory, and
emulation or target memory after each step command.
Source line stepping is implemented by single stepping through assembly
instructions until the next PC is beyond the address range of the current source line.
When attempting source line stepping on assembly code (with no associated source
line), stepping will complete when a source line is found. Therefore, stepping only
assembly code may step indefinitely. To abort stepping, type <CTRL>c.
When displaying memory mnemonic and stepping, the next instruction that will
step is highlighted. The memory mnemonic display autopages to the new address if
the next PC goes outside of the currently displayed address range. This feature
works even if stepping is performed in a different emulation window than one
displaying memory mnemonic (see the discussion on opening and using other
interface windows in Chapter 3, "Using the Emulator/Analyzer Interface").
If no value is entered for <NUMBER> times, only one step instruction is executed
each time you press the carriage return key. Multiple instructions can be executed
by holding down the carriage return key. Also, the default step is for assembly code
lines, not source code lines.
If the from address option (defined by —EXPR— or transfer_address) is omitted,
stepping begins at the next program counter address.
—EXPR—
An expression is a combination of numeric values, symbols, operators, and
parentheses specifying a memory address. See the EXPR syntax diagram.
Chapter 11: Emulator Commands
step
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