AMD 4.4.5 user manual Debugger Command Reference, Find Pattern in Memory, 151

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User Manual	November 21st, 2008

Table 10-4: MSR Read Examples

4.MSR registers can be modified by adding a "= Value" suffix on the above command syntax. Value will be assigned to the MSR register only if the value does not modify any reserved bits in the MSR. If an attempt is made to modify any reserved bits, the MSR write is ignored. An example MSR write is shown in Table 10-5:

5.This command may not allow access to all MSRs that are supported by the CPU model. To view a list of all registers supported by the R command, enter R? on the debugger command line.

Command	Description
	Assigns	a	value	of
R MC001001A = 0000000004000000	0x0000000004000000 to the MSR
	with an address of 0xC001001A.

Table 10-5: MSR Write Example

10.1.8 Find Pattern in Memory

The find pattern command q1 and qa can be used to search for a specific pattern in memory, The pattern that is searched for can either be an ASCII string or a binary pattern. If the search is for an ASCII string the noncase option (see Table 10-7,"Debugger Commands and Definitions", on page 154) can be used to match any character.

Command	Description
	Finds the first occurrence of ASCII
q1 0x1000,L 0x2000 "PCI"	pattern "PCI" in the given memory
	range, 0x1000 - 0x2000.
	Same as above but finds all occurrence

qa noncase 0x1000,L 0x2000 "PCI" of the ASCII pattern "PCI" using the

	none case-sensitive search algorithm.
	Finds all occurrences of the binary-
qa 0xF0000,P 0xFFFF 0x55 0xAA	pattern 0x55 0xAA in the given memory
	range, starting at physical address
	0xF0000 and ends at 0xF0000+0xFFFF.
Table 10-6: Find Pattern Example

10.2 Debugger Command Reference

The CPU Debugger Window consists of five areas, as shown in Figure 10-1.The top- most area displays the current CPU integer registers in 16-, 32-, or 64-bit mode, depending on the current mode of the CPU. The next area displays a disassembly of the next six instructions, starting at the current CS:[RE]IP. The next area displays 128 bytes of memory, as bytes, words, dwords, or qwords. The address, size, and physical or virtual attributes are based on the most recent D command. The next area is a general message window where messages and information are displayed. The bottom area is the command area, where debugger commands are entered.

Chapter 10: CPU Debugger 151