1. Brief explanation of ARM registers
Information from ARM Architecture Reference Manual.pdf:
31 general-purpose registers, 6 status registers (one cpsr, 5 spsrs).
The 31 general registers are divided into three categories: R0~R7, R8~R14, and PC program counter (R15).
R13 is often used as a stack pointer.
R14 stores the return address of the calling subroutine and the return address of the interrupt.
Used for program counter, pc pointer.
cpsr:
This is a brief description of the ARM registers.
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