11.4 Expressions

Almost all expression operators in C are supported except ~, ^, and unary &. Special rules in ddb are:

identifier

name of a symbol. It is translated to the address(or value) of it. . and : can be used in the identifier. If supported by an object format dependent routine, [file_name:]func[:line_number] [file_name:]variable, and file_name[:line_number] can be accepted as a symbol. The symbol may be prefixed with symbol_table_name:: like emulator::mach_msg_trap to specify other than kernel symbols.

number

radix is determined by the first two letters:

0x

hex

0o

octal

0t

decimal

otherwise, follow current radix.

.

dot

+

next

..

address of the start of the last line examined. Unlike dot or next, this is only changed by examine or write command.

´

last address explicitly specified.

$variable

register name or variable. It is translated to the value of it. It may be followed by a : and modifiers as described above.

a

multiple of right hand side.

*expr

indirection. It may be followed by a : and modifiers as described above.