121 lines
1.9 KiB
ArmAsm
121 lines
1.9 KiB
ArmAsm
global _start
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; constants
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SYS_READ equ 0
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SYS_WRITE equ 1
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SYS_SENDFILE equ 40
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SYS_SOCKET equ 41
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SYS_ACCEPT equ 43
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SYS_BIND equ 49
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SYS_LISTEN equ 50
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SYS_EXIT equ 60
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SYS_FCNTL equ 72
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SYS_UNLINK equ 87
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STDOUT equ 1
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AF_UNIX equ 1
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SOCK_STREAM equ 1
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F_GETFL equ 3
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F_SETFL equ 4
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O_NONBLOCK equ 2048
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SECTION .data
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hello db "Hello world!", 0x0a
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hello_len equ $ - hello
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server_path db "server.sock", 0x00
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server_path_len equ $ - hello
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sockaddr_len equ 110 ; $ man 7 unix
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SECTION .bss
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sockaddr resb sockaddr_len
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SECTION .text
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_start:
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mov rax, SYS_WRITE
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mov rdi, STDOUT
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mov rsi, hello
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mov rdx, hello_len
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syscall
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call make_server
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push rax
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call accept
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pop r10
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exit:
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mov rax, SYS_EXIT
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mov rdi, 0
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syscall
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accept:
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mov rdi, rax
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mov rax, SYS_ACCEPT
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mov rsi, 0
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mov rdx, 0
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syscall
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ret
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make_server:
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mov rax, SYS_UNLINK
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mov rdi, server_path
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syscall
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mov rax, SYS_SOCKET
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mov rdi, AF_UNIX
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mov rsi, SOCK_STREAM
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mov rdx, 0
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syscall
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push rax
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call nonblocking
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call make_sockaddr
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pop r10
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mov rax, SYS_BIND
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mov rdi, r10
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mov rsi, sockaddr
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mov rdx, sockaddr_len
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syscall
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mov rax, SYS_LISTEN
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mov rdi, r10
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mov rsi, 100
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syscall
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mov rax, r10
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ret
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nonblocking:
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mov r10, rax
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mov rax, SYS_FCNTL
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mov rdi, r10
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mov rsi, F_GETFL
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syscall
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mov r11, rax
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xor r11, O_NONBLOCK
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mov rax, SYS_FCNTL
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mov rdi, r10
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mov rsi, F_SETFL
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mov rdx, r11
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syscall
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ret
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make_sockaddr:
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mov word [sockaddr], AF_UNIX
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mov rax, 0
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make_sockaddr__copy_server_path:
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cmp rax, server_path_len
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jge return
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mov r10, [rax+server_path]
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add rax, 2
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mov [rax+sockaddr], r10
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sub rax, 1
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jmp make_sockaddr__copy_server_path
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return:
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ret
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