HELP DEPOSIT — VMS 5.4
Replaces the contents of the specified locations in virtual memory
and displays the new contents.
The DEPOSIT command, together with the EXAMINE command, aids
in debugging programs interactively. The DCL command DEPOSIT is
similar to the DEPOSIT command of the VMS Symbolic Debugger.
Requires user-mode read (R) and write (W) access to the virtual
memory location whose contents you wish to change.
Format
DEPOSIT location=data[,...]
Additional information available:
PARAMETERS
location Specifies the starting virtual address or range of virtual addresses (where the second address is larger than the first) whose contents are to be changed. A location can be any valid integer expression containing an integer value, a symbol name, a lexical function, or a combination of these entities. Radix qualifiers determine the radix in which the address is interpreted; hexadecimal is the initial default radix. Symbol names are always interpreted in the radix in which they were defined. The radix operators %X, %D, or %O can precede the location. A hexadecimal value must begin with a number (or be preceded by %X). The specified location must be within the virtual address space of the image currently running in the process. The DEPOSIT and EXAMINE commands maintain a pointer to a current memory location. The DEPOSIT command sets this pointer to the byte following the last byte modified; you can refer to this pointer by using a period (.) in subsequent EXAMINE and DEPOSIT commands. If the DEPOSIT command cannot deposit the specified data, the pointer does not change. The EXAMINE command does not change the value of the pointer. data[,...] Specifies the data to be deposited into the specified locations. By default, the data is assumed to be in hexadecimal format; it is then converted to binary format and is written into the specified location. If you specify more than one item, separate the items with commas (,). The DEPOSIT command writes the data in consecutive locations, beginning with the address specified. When non-ASCII data is deposited, you can specify each item of data using any valid integer expression. When ASCII data is deposited, only one item of data is allowed. All characters to the right of the equal sign are considered to be part of a single string. The characters are converted to uppercase, and all spaces are compressed.
QUALIFIERS
Additional information available:
/ASCII/BYTE/DECIMAL/HEXADECIMAL/LONGWORD
/OCTAL/WORD
/ASCII
Indicates that the specified data is ASCII.
Only one data item is allowed; all characters to the right of
the equal sign (=) are considered to be part of a single string.
Unless they are enclosed within quotation marks (" "), characters
are converted to uppercase and multiple spaces are compressed to a
single space before the data is written in memory.
The DEPOSIT command converts the data to its binary equivalent
before placing it in virtual memory. When you specify /ASCII,
or when ASCII mode is the default, the location you specify is
assumed to be hexadecimal.
/BYTE
Requests that data be deposited 1 byte at a time.
/DECIMAL
Indicates that the data is decimal. The DEPOSIT command converts the data to its binary equivalent before placing it in virtual memory.
/HEXADECIMAL
Indicates that the data is hexadecimal. The DEPOSIT command converts the data to its binary equivalent before placing it in virtual memory.
/LONGWORD
Requests that data be deposited a longword at a time.
/OCTAL
Indicates that the data is octal. The DEPOSIT command converts the data to its binary equivalent before placing it in virtual memory.
/WORD
Requests that the data be deposited one word at a time.
Examples
1. $ RUN MYPROG
.
.
.
<Ctrl/Y>
$ EXAMINE 2780
00002780: 1C50B344
$ DEPOSIT .=0
00002780: 00000000
$ CONTINUE
The RUN command executes the image MYPROG.EXE; subsequently,
Ctrl/Y interrupts the program. Assuming that the initial
defaults of the /HEXADECIMAL and /LONGWORD qualifiers are
in effect, the DEPOSIT command places a longword of zeros in
virtual memory location 2780.
Because the EXAMINE command sets up a pointer to the current
memory location, which in this case is virtual address 2780,
you can refer to this location with a period (.) in the DEPOSIT
command.
The CONTINUE command resumes execution of the image.
2. $ DEPOSIT/ASCII 2C00=FILE: NAME: TYPE:
00002C00: FILE: NAME: TYPE:...
In this example, the DEPOSIT command deposits character data
at hexadecimal location 2C00 and displays the contents of
the location after modifying it. Because the current default
length is a longword, the response from the DEPOSIT command
displays full longwords. The ellipsis ( . . . ) indicates that
the remainder of the last longword of data contains information
that was not modified by the DEPOSIT command.
3. $ EXAMINE 9C0 ! Look at Hex location 9C0
000009C0: 8C037DB3
$ DEPOSIT .=0 ! Deposit longword of 0
000009C0: 00000000
$ DEPOSIT/BYTE .=1 ! Put 1 byte at next location
000009C4: 01
$ DEPOSIT .+2=55 ! Deposit 55 next
000009C7: 55
$ DEPOSIT/LONG .=0C,0D,0E ! Deposit longwords
000009C8: 0000000C 0000000D 0000000E
The sequence of DEPOSIT commands in the above example
illustrates how the DEPOSIT command changes the current
position pointer. Note that after you specify the /BYTE
qualifier, all data is deposited and displayed in bytes, until
the /LONGWORD qualifier restores the system default.
4. $ BASE=%X200 ! Define a base address
$ LIST=BASE+%X40 ! Define offset from base
$ DEPOSIT/DECIMAL LIST=1,22,333,4444
00000240: 00000001 00000022 00000333 00004444
$ EXAMINE/HEX LIST:LIST+0C ! Display results in hex
00000240: 00000001 00000016 0000014D 0000115C
The assignment statements define a base address in hexadecimal
and a label at a hexadecimal offset from the base address.
The DEPOSIT command reads the list of values and deposits each
value into a longword, beginning at the specified location. The
EXAMINE command requests a hexadecimal display of these values.