What is Memory Addressing and Function Calls?section $.$text

global $\_$start

; Function $1$: DemoFastCall

DemoFastCall:

; EAX $=($EAX $+$ EBX$)-($ECX $+$ EDX$)$

add eax, ebx

add ecx, edx

sub eax, ecx

ret

; Function $2$: DemoCdecl

DemoCdecl:

; A $=(($A $+$ B$)-($C $+$ D$))*$ E

push eax

push ebx

push ecx

push edx

push esi ; E is stored in ESI

pop eax ; ESI $->$ EAX

add eax, ebx

add ecx, edx

sub eax, ecx

imul eax, esi

add esp, $20$ ; Clean up the stack

ret

; Function $3$: DemoStdCall

DemoStdCall:

; A $=(($A $+$ B$)-($C $+$ D$))*$ E

push eax

push ebx

push ecx

push edx

push esi ; E is stored in ESI

pop eax ; ESI $->$ EAX

add eax, ebx

add ecx, edx

sub eax, ecx

imul eax, esi

ret