From 73ceb3d7e165fab18df49394522f61ffb536d661 Mon Sep 17 00:00:00 2001 From: lohhiiccc Date: Tue, 9 Jun 2026 14:14:39 +0200 Subject: [PATCH] refactor: cleanup Sully.s --- src/Sully/Sully.s | 144 +++++++++++++++++++++++++++++----------------- 1 file changed, 92 insertions(+), 52 deletions(-) diff --git a/src/Sully/Sully.s b/src/Sully/Sully.s index c687c9f..2f66457 100644 --- a/src/Sully/Sully.s +++ b/src/Sully/Sully.s @@ -5,7 +5,7 @@ global _start %endif section .rodata -src: db "", 103, 108, 111, 98, 97, 108, 32, 95, 115, 116, 97, 114, 116, 10, 10, 37, 105, 102, 110, 100, 101, 102, 32, 78, 85, 77, 66, 69, 82, 10, 37, 100, 101, 102, 105, 110, 101, 32, 78, 85, 77, 66, 69, 82, 32, 53, 10, 37, 101, 110, 100, 105, 102, 10, 10, 115, 101, 99, 116, 105, 111, 110, 32, 46, 114, 111, 100, 97, 116, 97, 10, 115, 114, 99, 58, 32, 100, 98, 32, 126, 10, 115, 114, 99, 95, 108, 101, 110, 58, 32, 101, 113, 117, 32, 36, 32, 45, 32, 115, 114, 99, 10, 115, 101, 112, 58, 32, 100, 98, 32, 34, 44, 32, 34, 10, 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108, 108, 32, 83, 117, 108, 108, 121, 95, 120, 46, 115, 10, 9, 99, 97, 108, 108, 32, 99, 114, 101, 97, 116, 101, 95, 115, 117, 108, 108, 121, 10, 10, 9, 59, 32, 105, 102, 32, 99, 114, 101, 97, 116, 101, 95, 115, 117, 108, 108, 121, 32, 102, 97, 105, 108, 58, 32, 101, 120, 105, 116, 40, 45, 114, 97, 120, 41, 10, 9, 99, 109, 112, 32, 114, 97, 120, 44, 32, 48, 10, 9, 106, 108, 32, 46, 101, 120, 105, 116, 10, 10, 9, 99, 97, 108, 108, 32, 112, 114, 101, 112, 97, 114, 101, 95, 99, 111, 109, 112, 32, 59, 32, 105, 110, 105, 116, 32, 99, 111, 109, 112, 32, 97, 110, 100, 32, 108, 105, 110, 107, 32, 115, 116, 114, 105, 110, 103, 115, 10, 10, 9, 59, 32, 101, 120, 101, 99, 118, 101, 40, 98, 105, 110, 44, 32, 97, 114, 103, 115, 44, 32, 78, 85, 76, 76, 41, 10, 9, 109, 111, 118, 32, 114, 97, 120, 44, 32, 53, 57, 10, 9, 108, 101, 97, 32, 114, 100, 105, 44, 32, 91, 114, 101, 108, 32, 98, 105, 110, 93, 10, 9, 108, 101, 97, 32, 114, 115, 105, 44, 32, 91, 114, 101, 108, 32, 97, 114, 103, 115, 93, 10, 9, 120, 111, 114, 32, 114, 100, 120, 44, 32, 114, 100, 120, 10, 9, 115, 121, 115, 99, 97, 108, 108, 10, 10, 9, 59, 32, 101, 120, 105, 116, 40, 101, 114, 114, 110, 111, 41, 10, 46, 101, 120, 105, 116, 58, 9, 10, 9, 69, 88, 73, 84, 32, 114, 97, 120, 10 src_len: equ $ - src sep: db ", " zero_str: db "0" @@ -25,7 +25,12 @@ section .data fd: dq 1 buff_len: dd 0 filename: db "Sully_x.s", 0 + +%if NUMBER == 0 +arg2: db "nasm -f elf64 Sully_x.s -o Sully_x.asm.o -DNUMBER=-1 && ld -o Sully_asm_x Sully_x.asm.o && ./Sully_asm_x", 0 +%else arg2: db "nasm -f elf64 Sully_x.s -o Sully_x.asm.o -DNUMBER=@ && ld -o Sully_asm_x Sully_x.asm.o && ./Sully_asm_x", 0 +%endif section .text @@ -47,11 +52,13 @@ prepare_comp: cmp bl, 'x' ; if str[r14] == 'x' jne .next + dec al mov byte [r14], al + inc al jmp .continue .next: - cmp bl, '@' ; else of str[r14] == '@' + cmp bl, '@' ; else of str[r14] == '@' jne .continue dec al mov byte [r14], al @@ -66,58 +73,74 @@ prepare_comp: ret open_sully: - mov al, byte [rel i] ; load i in al - mov byte [rel filename + 6], al ; filename[6] = al + ; filename[6] = i - 1 + mov al, byte [rel i] + dec al + mov byte [rel filename + 6], al + inc al - mov rax, 2 ; SYS_OPEN - lea rdi, [rel filename] ; set filename - mov rsi, [rel flags] ; set flags - mov rdx, 0664o ; set perm + ; open(filename, flags, perm) + mov rax, 2 + lea rdi, [rel filename] + mov rsi, [rel flags] + mov rdx, 0664o syscall - cmp rax, 0 ; if -errno + + cmp rax, 0 jl .done - mov [rel fd], rax ; fd = open(filename, flags, 0644) + ; fd = rax + mov [rel fd], rax .done: ret flush_buff: cmp dword [rel buff_len], 0 jz .done - mov eax, 1 ; SYS_WRITE - mov edi, [rel fd] ; set fd - lea rsi, [rel buffer] ; set addr - mov edx, [rel buff_len] ; set len - syscall ; write( fd, addr, len ) - mov dword [rel buff_len], 0 ; buff_len = 0 + + ; write(fd, addr, len) + mov eax, 1 + mov edi, [rel fd] + lea rsi, [rel buffer] + mov edx, [rel buff_len] + syscall + + ; bufflen = 0 + mov dword [rel buff_len], 0 .done: ret -; param: al = byte to add add_to_buff: - mov r9d, dword [rel buff_len] ; r9d = buff_len - cmp r9d, BUFF_SIZE; if buff_len >= BUFF_SIZE + ; if buff_len >= BUFF_SIZE + mov r9d, dword [rel buff_len] + cmp r9d, BUFF_SIZE jge .flush .add_char: - lea r10, [rel buffer] ; r10 = &buffer - add r10, r9 ; r10 += buff_len - mov byte [r10], al ; buffer[buff_len] = al + ; buffer[buff_len] = al + lea r10, [rel buffer] + add r10, r9 + mov byte [r10], al - inc dword [rel buff_len] ; ++buff_len + ; buff_len++ + inc dword [rel buff_len] ret .flush: push rdx - push rax ; save char - call flush_buff ; - pop rax ; restore char + push rax + + call flush_buff + + pop rax pop rdx - xor r9d, r9d ; sync r9d with buff_len - jmp .add_char ; + + xor r9d, r9d + jmp .add_char int8_to_buff: - xor r8b, r8b ; flag = 0 (nothing written) + ; flag = 0 (nothing written) + xor r8b, r8b movzx eax, al ; hundreds @@ -141,7 +164,7 @@ int8_to_buff: div ecx ; al = tens, edx = units add al, '0' - ; if r8b == 0 && al == '0' go to no_tens + ; if r8b == 0 && al == '0' goto no_tens cmp r8b, 0 je .test_tens jmp .skip @@ -158,15 +181,16 @@ int8_to_buff: .no_tens: mov al, dl ; al = units - .units: add al, '0' call add_to_buff ret do_quine: - push r14; int i - xor r14, r14 ; i = 0 + ; int i = 0 + push r14 + xor r14, r14 + ; while r14 (i) <= src_len .loop: cmp r14, src_len @@ -186,30 +210,34 @@ do_quine: inc r14 jmp .loop .ldone: - pop r14; release i + ; restore r14 + pop r14 call flush_buff ret .escape_string: + ; push '""' to buffer push rax - mov al, 34 ; ',' + mov al, 34 call add_to_buff - mov al, 34 ; ' ' + mov al, 34 call add_to_buff pop rax + ; int j = 0 push r14 - xor r14, r14 ; int j = 0 + xor r14, r14 .e_loop: cmp r14, src_len jge .el_done + ; push ', ' to buffer push rax - mov al, 44 ; ',' + mov al, 44 call add_to_buff - mov al, 32 ; ' ' + mov al, 32 call add_to_buff pop rax @@ -219,21 +247,27 @@ do_quine: movzx eax, byte [rsi] call int8_to_buff - inc r14 ; j++ + ; j++ + inc r14 jmp .e_loop .el_done: pop r14 - inc r14 ; i++ + ; i++ + inc r14 jmp .loop create_sully: - call open_sully ; open Sully_x.s - cmp rax, 0 - jl .done ; exit if -errno + ; open Sully.s + call open_sully - call do_quine ; write in Sully_x.s + ; if fd < 0: ret + cmp rax, 0 + jl .done + + ; fill Sully.s + call do_quine ; close(Sully_x.s) mov rdi, [rel fd] @@ -244,22 +278,28 @@ create_sully: ret _start: - %if NUMBER == 0 + ; if i < 0 return 0 + %if NUMBER == -1 xor rax, rax jmp .exit %endif - call create_sully ; create and fill Sully_x.s - cmp rax, 0 ; error check + ; create and fill Sully_x.s + call create_sully + + ; if create_sully fail: exit(-rax) + cmp rax, 0 jl .exit call prepare_comp ; init comp and link strings - mov rax, 59 ; execve - lea rdi, [rel bin] ; load bin - lea rsi, [rel args] ; load args - xor rdx, rdx ; envp[] is not used + ; execve(bin, args, NULL) + mov rax, 59 + lea rdi, [rel bin] + lea rsi, [rel args] + xor rdx, rdx syscall + ; exit(errno) .exit: EXIT rax