The software described in this documentation is either in Extended Support or Sustaining Support. See for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

9.2.5 Helper Commands

The following commands perform calculation, translation, and search functions:


Translates a hexadecimal value to ASCII. With no argument, the command displays an ASCII chart.


Translates a hexadecimal address to a page number.


Evaluates an expression and displays the result in hexadecimal, decimal, octal, and binary. For example:

crash> eval 4g / 0x100
hexadecimal: 1000000  (16MB)
    decimal: 16777216  
      octal: 100000000
     binary: 0000000000000000000000000000000000000001000000000000000000000000

Displays the contents of a linked list of data objects, typically structures, starting at a specified address.


Translates a page number to its physical address (byte value).


Translates a physical address to a kernel virtual address.


Searches for a specified value in a specified range of user virtual memory, kernel virtual memory, or physical memory.


Displays a selected range of user virtual memory, kernel virtual memory, or physical memory using the specified format.


Writes a value to a memory location specified by symbol or address.


To avoid data loss or data corruption, take great care when using the wr command.