M5253EVBE Users Manual, Rev. 1
Freescale Semiconductor
2-19
Examples:
To pass over a subroutine call, the command is:
step
2.4.27
SYMBOL (Symbol Name Management)
Usage: SYMBOL <symb> <-a symb value> <-r symb> <-c|l|s>
The SYMBOL command adds or removes symbol names from the symbol table. If only a symbol name is
provided to the SYMBOL command, then the symbol table is searched for a match on the symbol name
and its information displayed.
The -a option adds a symbol name and its value into the symbol table. The -r option removes a symbol
name from the table.
The -c option clears the entire symbol table, the -l option lists the contents of the symbol table, and the -s
option displays usage information for the symbol table.
Symbol names contained in the symbol table are truncated to 31 characters. Any symbol table lookups,
either by the SYMBOL command or by the disassembler, will only use the first 31 characters. Symbol
names are case-sensitive.
Symbols can also be added to the symbol table via in-line assembly labels and ethernet downloads of ELF
formatted files.
Examples:
To define the symbol “main” to have the value 0x0004_0000, the command is:
symbol -a main 40000
To remove the symbol “junk” from the table, the command is:
symbol -r junk
To see how full the symbol table is, the command is:
symbol -s
To display the symbol table, the command is:
symbol -l
2.4.28
TRACE (Trace Into)
Usage: TRACE <num>
The TRACE command allows single-instruction execution. If num is provided, then num instructions are
executed before control is handed back to dBUG. The value for num is a decimal number.
The TRACE command sets bits in the processors’ supervisor registers to achieve single-instruction
execution, and the target code executed. Control returns to dBUG after a single-instruction execution of
the target code.
This command is repeatable.