Question: In assembly, what do the following lines of code do: subq $40, %rsp .cfi_offset 3, -24 movq %rdi, -40(%rbp) movq -40(%rbp), %rax leaq 0(,%rax,8), %rdx

In assembly, what do the following lines of code do:

subq $40, %rsp

.cfi_offset 3, -24

movq %rdi, -40(%rbp)

movq -40(%rbp), %rax

leaq 0(,%rax,8), %rdx

leaq num(%rip), %rax

movq (%rdx,%rax), %rax

Specifically, the lea num(%rip),%rax line, does this assign %rax = num + %rip and if num was never defined what does this mean.

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