Appeal 2007-1541
Application 10/334,695
4. The processor sets the affected privilege flags in order to
selectively identify the types of branch trace store data that is to be logged to
the buffer (Specification 5).
5. During program execution, the processor inspects the values of
the privilege flags to determine whether any particular instruction is to be
logged to the buffer (Specification 6).
Berry
6. Berry teaches an apparatus and method for cataloging symbolic
data for use in performance analysis of computer programs, storing such
data during or shortly after a performance trace (Abstract).
7. A portion of the trace data of Berry, known as “Field 8,”
comprises Segment Flags, which are flags that indicate permission levels on
the pages into which the segment gets loaded (Fig. 11; col. 16, ll. 26-28).
8. Berry’s Field 8 corresponds to a code privilege level. The code
privilege level indicates the privileges that the executing code has. For
example, the code privileges level may indicate whether the executing code
is in a user space or kernel space (col. 16, ll. 48-52).
Doi
9. Doi teaches a trace control circuit that stores branch trace store
data according to predefined circumstances (col. 5, ll. 35-57).
10. When the appropriate write signal, selection signal and clock
signal are logic high, 40-bit data composed of status information, the branch-
destination address abbreviation information, the branch-source address data
and the branch-destination address data is written into the trace memory
(col. 10, ll. 10-17).
5
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