Figure 10- 52 sub_2903E824
The 16th data source comes from R5, which is the 17th data source. The 17th data source is
from R1, which is the 18th data source, and it is read without being written, meaning R1 comes
from the caller of sub_2903E824, right? Let’s take a look at the subroutine’s cross references, as
shown in figure 10-53.
Figure 10- 53 Inspect cross references
“Calculate service for sending new compose”, as the name suggests, its function is quite
clear. Double click the first cross reference to check its caller, as shown in figure 10-54.