BarinkOS/src/kernel/cpu.s

25 lines
589 B
ArmAsm
Raw Normal View History

# Basic cpu functions
.globl GetCR0
GetCR0:
push %ebp # save the base pointer on the stack
mov %esp, %ebp # Set the base pointer to the current stack pointer
xor %eax, %eax # Clear EAX to make sure no weird stuff is going on
mov %cr0, %eax # Copy the value of the CR0 register into EAX
mov %ebp, %esp # restore the base pointer
pop %ebp
ret
.globl GetEFLAGS
GetEFLAGS:
push %ebp
mov %esp, %ebp
xor %eax, %eax
pushfl # Push the EFLAGS register content onto the stack, should be pushfd but GAS apparently doesn't agree
mov 4(%esp) , %eax
mov %ebp, %esp
pop %ebp
ret