Copyright ã 2005 Symbian Ltd.
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Some background - APCS
•The ARM Procedure Calling Standard (APCS)
…Imposes conventions on the use of
registers
…So we always know the important registers to look at
Program counter
R15 (PC)
Return address on function entry
R14 (LR)
Current stack position
R13 (SP)
Arguments to the function
R1-3
The “this” pointer in C++ and the
integer return result from a function
R0
Role
Register