Commands to Display Memory and Symbols

Commands to Display Memory and Symbols

The commands summarized in Table 11-6 are used to display memory based on specific addresses or symbols, and to display the addresses for kernel symbols.

Commands to Display Memory and Symbols
Command Operation
dsym addr [length] Dump memory by words, starting at addr. When a word of memory data is reasonably close to the value of a kernel symbol, the symbol plus offset is displayed instead of the hex value.
hd addr [length] Dump memory in bytes, with ASCII translation, starting at addr. When length is given, it is a count of words (not bytes) to be displayed.
pb Display the strings in the circular putbuf (see "Displaying to the Circular Message Buffer").
string addr [max] Display memory as an ASCII string. Display stops at the first null byte, or, when max is specified, after at most max bytes.

Commands to Display Memory and Symbols
Command	Operation
dsym addr [length]	Dump memory by words, starting at addr. When a word of memory data is reasonably close to the value of a kernel symbol, the symbol plus offset is displayed instead of the hex value.
hd addr [length]	Dump memory in bytes, with ASCII translation, starting at addr. When length is given, it is a count of words (not bytes) to be displayed.
pb	Display the strings in the circular putbuf (see "Displaying to the Circular Message Buffer").
string addr [max]	Display memory as an ASCII string. Display stops at the first null byte, or, when max is specified, after at most max bytes.

When you display the circular buffer, there is no special indication to show which line is the newest. You have to deduce the boundary between the newest and oldest lines from the content.