The Extended Instruction Pointer EIP, seems to be the equivalent
of the Program Counter PC register in the ARM architecture:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0274b/index.html
The list of ARM registers can be seen in the structure sigcontext
in the file: /usr/include/arm-linux-gnueabihf/asm/sigcontext.h