a
adb(1) | adb(1) |
Expressions
Expressions are interpreted as follows:
. The value of dot.
+The value of dot increased by the current increment.
^The value of dot decreased by the current decrement.
"The last address typed.
integer A number. The pre®x 0 (zero) forces interpretation in octal radix; the pre®xes 0d and 0D force interpretation in decimal radix; the pre®xes 0x and 0X force interpretation in hexadecimal radix. Thus 020 = 0d16 = 0x10 = sixteen. If no pre®x appears, the default radix is used; see the $d command. The radix is initialized to the base used in the assembly language for the processor involved. Note that a hexadecimal number whose most signi®cant digit would otherwise be an alphabetic character must have a 0x (or 0X) pre®x.
integer.fraction
A
'cccc' | The ASCII value of up to 4 characters. A backslash (\) can be used to escape a single |
| quote ('). |
< name | name can have the value of either a variable or a register. adb maintains a number of |
| variables named by single letters or digits; see Variables below. If name is a register, the |
| value of the register is obtained from the CORE_PROC segment in cor®l (before the sub- |
| process is initiated) or from the user area of the subprocess. Register names are imple- |
| mentation dependent; see the $r command. |
symbol | A symbol is a sequence of uppercase or lowercase letters, underscores, or digits, not start- |
| ing with a digit. A backslash (\) can be used to escape other characters. The value of the |
| symbol is taken from the symbol table in obj®l. An initial underscore (_) is pre®xed to |
| symbol, if needed. |
_ symbol | If the compiler pre®xes _ to an external symbol, it may be necessary to cite this name to |
| distinguish it from a symbol generated in assembly language. |
(exp) | The value of the expression exp. |
The following are monadic operators:
*exp | The contents of the location addressed by exp in cor®l. |
@exp The contents of the location addressed by exp in obj®l.
~exp | Bitwise complement. |
The following dyadic operators are left associative and are less binding than monadic operators:
e1+e2 Integer addition.
e1*e2 Integer multiplication.
e1%e2 Integer division.
e1&e2 Bitwise conjunction.
e1e2 Bitwise disjunction.
e1#e2 e1 rounded up to the next multiple of e2.
Commands
Most commands consist of an action character followed by a modi®er or list of modi®ers. The following action characters can take format speci®ers. (The action characters ? and / can be followed by *; see Addresses for further details.)
?f | Locations starting at address in obj®l are printed according to the format f. dot is incre- | |
| mented by the sum of the increments for each format letter. If a subprocess has been ini- | |
| tiated, address references a location in the address space of the subprocess instead of | |
Section 1−4 | − 2 − | |