CS 456 - Systems Programming Spring 2024

Displaying ./code/apr10/socket_L29.asm

; Socket
; Compile with: nasm -f elf socket.asm
; Link with (64 bit systems require elf_i386 option): ld -m elf_i386 socket.o -o socket
; Run with: ./socket
 
%include    'functions.asm'
 
SECTION .text
global  _start
 
_start:
 
    xor     eax, eax            ; init eax 0
    xor     ebx, ebx            ; init ebx 0
    xor     edi, edi            ; init edi 0
    xor     esi, esi            ; init esi 0
 
_socket:
 
    push    byte 6              ; push 6 onto the stack (IPPROTO_TCP)
    push    byte 1              ; push 1 onto the stack (SOCK_STREAM)
    push    byte 2              ; push 2 onto the stack (PF_INET)
    mov     ecx, esp            ; move address of arguments into ecx
    mov     ebx, 1              ; invoke subroutine SOCKET (1)
    mov     eax, 102            ; invoke SYS_SOCKETCALL (kernel opcode 102)
    int     80h                 ; call the kernel
 
    call    iprintLF            ; call our integer printing function (print the file descriptor in EAX or -1 on error)
 
_exit:
 
    call    quit                ; call our quit function