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Channels in Assembly Language
; Channels in Assembly Language
; In Assembly, we don't have built-in channels or goroutines.
; We'll simulate a simple message passing using memory and interrupts.
section .data
message db 'ping', 0 ; Our message to send
section .bss
received resb 5 ; Buffer to store received message
section .text
global _start
_start:
; Simulate sending a message
mov eax, 4 ; System call for write
mov ebx, 1 ; File descriptor 1 is stdout
mov ecx, message ; Address of string to output
mov edx, 4 ; Number of bytes
int 0x80 ; Call kernel
; Simulate receiving a message
mov eax, 3 ; System call for read
mov ebx, 0 ; File descriptor 0 is stdin
mov ecx, received ; Address of buffer to store input
mov edx, 5 ; Number of bytes to read
int 0x80 ; Call kernel
; Print received message
mov eax, 4 ; System call for write
mov ebx, 1 ; File descriptor 1 is stdout
mov ecx, received ; Address of string to output
mov edx, 5 ; Number of bytes
int 0x80 ; Call kernel
; Exit program
mov eax, 1 ; System call for exit
xor ebx, ebx ; Return 0 status
int 0x80 ; Call kernelIn Assembly Language, we don’t have direct equivalents for channels or goroutines. Instead, we’ve simulated a simple message passing mechanism using memory and system calls.
- We define our message “ping” in the data section.
- We allocate a buffer in the bss section to store the received message.
- In the
_startsection:- We first “send” the message by writing it to stdout (simulating sending to a channel).
- We then “receive” a message by reading from stdin (simulating receiving from a channel).
- Finally, we print the received message.
To run this program, you would need to assemble it into an object file, link it, and then execute the resulting binary. The exact commands may vary depending on your system and assembler, but it might look something like this:
$ nasm -f elf64 channels.asm
$ ld -o channels channels.o
$ ./channels
ping
pingIn this example, when you run the program, it will output “ping” (the sent message), then wait for input. When you type “ping” and press enter, it will output “ping” again (the received message).
This is a very simplified simulation of channel-like behavior. In real-world applications, more complex mechanisms like inter-process communication (IPC) or network sockets would be used for similar purposes in assembly or low-level programming.