206 lines
4 KiB
ArmAsm
206 lines
4 KiB
ArmAsm
global _start
|
|
|
|
; constants
|
|
SYS_READ equ 0
|
|
SYS_WRITE equ 1
|
|
SYS_CLOSE equ 3
|
|
SYS_POLL equ 7
|
|
SYS_SENDFILE equ 40
|
|
SYS_SOCKET equ 41
|
|
SYS_ACCEPT equ 43
|
|
SYS_SHUTDOWN equ 48
|
|
SYS_BIND equ 49
|
|
SYS_LISTEN equ 50
|
|
SYS_EXIT equ 60
|
|
SYS_FCNTL equ 72
|
|
SYS_UNLINK equ 87
|
|
STDOUT equ 1
|
|
AF_UNIX equ 1
|
|
SOCK_STREAM equ 1
|
|
F_GETFL equ 3
|
|
F_SETFL equ 4
|
|
O_NONBLOCK equ 2048
|
|
POLLIN equ 1
|
|
POLLOUT equ 4
|
|
SHUT_RDWR equ 2
|
|
|
|
pollfd_size equ 4 + 2 + 2 ; $ man 2 poll
|
|
pollfds_capacity equ 100
|
|
client_size equ 1 + 256 + 256 ; state, line buffer, uri
|
|
clients_capacity equ pollfds_capacity - 1
|
|
|
|
SECTION .data
|
|
server_path db "server.sock", 0x00
|
|
server_path_len equ $ - server_path
|
|
sockaddr_size equ 2 + 108 ; $ man 7 unix
|
|
goodbye db "goodbye", 0x0a
|
|
goodbye_len equ $ - goodbye
|
|
pollfds_len dq 0
|
|
clients_len dq 0
|
|
|
|
SECTION .bss
|
|
sockaddr resb sockaddr_size
|
|
pollfds resb pollfd_size * pollfds_capacity
|
|
clients resb (4 + client_size) * clients_capacity
|
|
|
|
SECTION .text
|
|
|
|
%include "server.s"
|
|
%include "readline.s"
|
|
|
|
_start:
|
|
call make_server
|
|
mov rbx, rax ; server fd
|
|
mov rdi, rax
|
|
mov rsi, POLLIN
|
|
call pollfds__append
|
|
|
|
poll:
|
|
mov rax, SYS_POLL
|
|
mov rdi, pollfds
|
|
mov rsi, [pollfds_len]
|
|
mov rdx, 5000
|
|
syscall
|
|
cmp rax, 0
|
|
je poll
|
|
jl exit ; TODO handle this gracefully
|
|
mov rdi, rbx
|
|
|
|
; rdi - server fd
|
|
pollfds__scan:
|
|
mov r15, 0
|
|
|
|
pollfds__scan__loop:
|
|
cmp r15, [pollfds_len]
|
|
jge poll
|
|
mov r10w, [pollfds + r15 * pollfd_size + 6]
|
|
cmp r10w, 0
|
|
jne pollfds__scan__found
|
|
add r15, 1
|
|
jmp pollfds__scan__loop
|
|
|
|
pollfds__scan__found:
|
|
mov r14, 0
|
|
mov r14d, [pollfds + r15 * pollfd_size]
|
|
cmp r14d, edi
|
|
je pollfds__scan__found__server
|
|
|
|
pollfds__scan__found__client:
|
|
; TODO check r10w, incl for POLLNVAL & POLLERR
|
|
push rdi
|
|
|
|
mov rdi, r14
|
|
call clients__append
|
|
|
|
mov r12, [clients_len]
|
|
add r12, -1
|
|
imul r12, client_size
|
|
add r12, clients
|
|
add r12, 4
|
|
|
|
mov rdi, r14
|
|
mov rsi, r12
|
|
mov rdx, 256
|
|
call readline
|
|
cmp rax, 0 ; TODO
|
|
jl exit
|
|
;push rax ; TODO
|
|
|
|
mov rdx, rax
|
|
mov rax, SYS_WRITE
|
|
mov rdi, r14
|
|
mov rsi, r12
|
|
syscall
|
|
cmp rax, 0
|
|
jl exit ; TODO handle this gracefully
|
|
|
|
mov rax, SYS_SHUTDOWN
|
|
mov rdi, 0
|
|
mov edi, r14d
|
|
mov rsi, SHUT_RDWR
|
|
syscall
|
|
|
|
mov rax, SYS_CLOSE
|
|
mov rdi, 0
|
|
mov edi, r14d
|
|
syscall
|
|
|
|
mov rdi, r15
|
|
call pollfds__remove
|
|
|
|
pop rdi
|
|
jmp pollfds__scan__loop
|
|
|
|
pollfds__scan__found__server:
|
|
; TODO check r10w, incl for POLLNVAL & POLLERR
|
|
push rdi
|
|
|
|
mov rax, SYS_ACCEPT
|
|
mov rsi, 0
|
|
mov rdx, 0
|
|
syscall
|
|
cmp rax, 0
|
|
jl exit ; TODO handle this gracefully
|
|
|
|
mov rdi, rax
|
|
mov si, POLLIN | POLLOUT
|
|
call pollfds__append
|
|
|
|
pop rdi
|
|
add r15, 1
|
|
jmp pollfds__scan__loop
|
|
|
|
; edi - fd
|
|
; si - events
|
|
pollfds__append:
|
|
; TODO check against pollfds_capacity
|
|
mov r10, [pollfds_len]
|
|
mov [pollfds + r10 * pollfd_size], edi
|
|
mov [pollfds + r10 * pollfd_size + 4], si
|
|
add r10, 1
|
|
mov [pollfds_len], r10
|
|
ret
|
|
|
|
; rdi - pollfds array index to remove
|
|
pollfds__remove:
|
|
mov r11, [pollfds_len]
|
|
cmp rdi, r10
|
|
jge return ; XXX index out of bounds, do some other error?
|
|
cmp r11, 1
|
|
jle pollfds__clear
|
|
mov r10, [pollfds + (r11 - 1) * pollfd_size]
|
|
mov [pollfds + rdi * pollfd_size], r10
|
|
sub r11, 1
|
|
mov [pollfds_len], r11
|
|
ret
|
|
|
|
pollfds__clear:
|
|
mov r10, 0
|
|
mov [pollfds_len], r10
|
|
ret
|
|
|
|
; esi - fd
|
|
clients__append:
|
|
; TODO check against client_capacity
|
|
mov r10, [clients_len]
|
|
imul r10, client_size
|
|
add r10, clients
|
|
mov [r10], esi
|
|
add r10, 4
|
|
mov r8b, 0
|
|
mov r11, 0
|
|
|
|
clients__append__init:
|
|
cmp r11, client_size
|
|
jge return
|
|
mov [r10 + r11], r8b
|
|
add r11, 1
|
|
jmp clients__append__init
|
|
|
|
return:
|
|
ret
|
|
|
|
exit:
|
|
mov rax, SYS_EXIT
|
|
mov rdi, 0
|
|
syscall
|