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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.
ยด
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.