From f0cab2dca67c361919f73b751c9db2a79e55d1db Mon Sep 17 00:00:00 2001
From: pablusha <pablusha@pablusha.ru>
Date: Tue, 5 May 2026 16:18:10 +0300
Subject: [PATCH] added basic shit

---
 .gitignore          |   1 +
 build.sh            |  16 ++++++++
 src/cat/cat.asm     |  90 ++++++++++++++++++++++++++++++++++++++++++++
 src/false/false.asm |   7 ++++
 src/true/true.asm   |   7 ++++
 tmp/cat.o           | Bin 0 -> 1536 bytes
 tmp/false.o         | Bin 0 -> 576 bytes
 tmp/true.o          | Bin 0 -> 576 bytes
 8 files changed, 121 insertions(+)
 create mode 100644 .gitignore
 create mode 100755 build.sh
 create mode 100644 src/cat/cat.asm
 create mode 100644 src/false/false.asm
 create mode 100644 src/true/true.asm
 create mode 100644 tmp/cat.o
 create mode 100644 tmp/false.o
 create mode 100644 tmp/true.o

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..36f971e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+bin/*
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..7556750
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,16 @@
+set -ex
+
+echo "compiling true"
+nasm -f elf64 -o tmp/true.o src/true/true.asm
+ld -s --nmagic -o bin/true tmp/true.o
+ls -l bin/true
+
+echo "compiling false"
+nasm -f elf64 -o tmp/false.o src/false/false.asm
+ld -s --nmagic -o bin/false tmp/false.o
+ls -l bin/false
+
+echo "compiling cat"
+nasm -f elf64 -o tmp/cat.o src/cat/cat.asm
+ld -s -o bin/cat tmp/cat.o
+ls -l bin/cat
diff --git a/src/cat/cat.asm b/src/cat/cat.asm
new file mode 100644
index 0000000..71b9d30
--- /dev/null
+++ b/src/cat/cat.asm
@@ -0,0 +1,90 @@
+%define STDOUT 1
+%define STDERR 2
+
+%define SYS_READ 0
+%define SYS_WRITE 1
+%define SYS_OPEN 2
+%define SYS_CLOSE 3
+%define SYS_EXIT 60
+
+%define O_RDONLY 0
+
+section .bss
+    buf resb 4096
+
+section .data
+    file_err_m db "file error", 10, 0
+    args_err_m db "args error", 10, 0
+
+section .text
+global _start
+
+_start:
+    ; так ну для начала надо бы понять сколько у нас аргументов
+    mov rbx, [rsp]
+    cmp rbx, 1
+    je .prep_narg
+    cmp rbx, 2
+    jne args_err
+    jmp .prep
+.prep_narg:
+    xor r12, r12
+    jmp .loop
+.prep:
+    mov rax, SYS_OPEN
+    mov rdi, [rsp + 16]; argv[1]
+    mov rsi, O_RDONLY
+    xor rdx, rdx
+    syscall
+    js file_err
+
+    mov r12, rax
+.loop:
+    mov rax, SYS_READ
+    mov rdi, r12
+    mov rsi, buf
+    mov rdx, 4096
+    syscall
+
+    test rax, rax
+    jz .done
+
+    mov rdx, rax
+    mov rax, SYS_WRITE
+    mov rdi, STDOUT
+    mov rsi, buf
+    syscall
+    jmp .loop
+.done:
+    mov rax, SYS_CLOSE
+    mov rdi, r12
+    syscall
+    jmp exit
+
+file_err:
+    mov rax, SYS_WRITE
+    mov rdi, STDERR
+    mov rsi, file_err_m
+    mov rdx, 12
+    syscall
+
+    jmp exit_err
+
+args_err:
+    mov rax, SYS_WRITE
+    mov rdi, STDERR
+    mov rsi, args_err_m
+    mov edx, 12
+    syscall
+
+    jmp exit_err
+
+exit_err:
+    mov rax, SYS_EXIT
+    mov rdi, 1
+    syscall
+
+exit:
+    mov rax, SYS_EXIT
+    mov rdi, 0
+    syscall
diff --git a/src/false/false.asm b/src/false/false.asm
new file mode 100644
index 0000000..9a63501
--- /dev/null
+++ b/src/false/false.asm
@@ -0,0 +1,7 @@
+section .text
+global _start
+
+_start:
+    mov rax, 60
+    mov rdi, 1
+    syscall
diff --git a/src/true/true.asm b/src/true/true.asm
new file mode 100644
index 0000000..a6bfb62
--- /dev/null
+++ b/src/true/true.asm
@@ -0,0 +1,7 @@
+section .text
+global _start
+
+_start:
+    mov rax, 60
+    xor rdi, rsi
+    syscall
diff --git a/tmp/cat.o b/tmp/cat.o
new file mode 100644
index 0000000000000000000000000000000000000000..b68b9a7f0717e450c176b142cece9ace396af069
GIT binary patch
literal 1536
zcmbW1PiqrF6u@7Su9Q;PC@7Y;&_iy@YDMrO5|EY^D*XT+(n-6mg``<#M@T^sDnUZ;
z(qr)}cv*U|B0>+n`56QcIeGTbzBlt`Go5UE@WIZ$_nY@;{=D4}D{HION(HP`;025=
zO97f=mGve}!<0k+Po-MZ_|&}cW|cwx>V#kM7EV)+>*DWU4WC%?EXPwGS2no*xeHPE
zmIHT?`L!wJF~etMIO3n}0?yg3I&P41{1FGx`lvRY6^Y$f1NE}{^+3D9C-W*szy3p<
z@z0c;k2!vW3=}e{j$eO!x05U-QugEw2)UD4onlDh!-Yot@n1#F;#ds_2gpXj>*e30
zxt#VLAHHwYziH3qUt!RXUk!ieWUdYW#F~?FLVFK`c<^1#$HN~v?c$V%u}c_?&T?8I
z2BN-dd~}I%8oF(qT)b%#^5-^t7#JOG45JYsYG)ZlTS5tlRMJ-vWp6Vjm1v{3-!*Tx
zWzrGG$;93;(q^XM??stQt@Mke`zY%i;*%Y5TPOB!AK<R$lX;ey(}}tAL>o1@=R(w9
zGN1SOI`gL<f5W`%@g3&-9#5Hn_PFt@!B>wTu>YyYAD~??IiJEUlbeq=g`y`CSr^*x
zwt<?wg-zb->K<pcl_?<=m{*j_ByH{CC*T6BcY3|l>RY|Nq{vw0gQUN!D6v+G)!^UQ
V2;H1}OX3<naJbtAUp#K_^%96UiqQZ7

literal 0
HcmV?d00001

diff --git a/tmp/false.o b/tmp/false.o
new file mode 100644
index 0000000000000000000000000000000000000000..d4ae94f94e463dd2eddd0f02a9e5869db3b28673
GIT binary patch
literal 576
zcmb<-^>JfjWMqH=Mg}_u1P><4z~F#jLfH-stPD&@qU13_c7ZS(n)U{$BY4on1<?5H
zKt3~?7>GLos$UUJ4k`>66$G-d`QiXnVFFYo3y=oc!vW<>Kxs*+IFt*g6rhI6z(pVo
zbo+PM0LAx%MEP04D)dTHD@qvjiZhB!ib@ibfUL?~2o2#wj3G#ZOk`pB_#c}>W-Ku*
j3REb7MVz6yC|N%(F{d~cLh2<J=Q6|>mn0UIfQ<$K*jFAQ

literal 0
HcmV?d00001

diff --git a/tmp/true.o b/tmp/true.o
new file mode 100644
index 0000000000000000000000000000000000000000..945e55d01e8f995fac19d27257a9ab6c89f02da2
GIT binary patch
literal 576
zcmb<-^>JfjWMqH=Mg}_u1P><4z~F#jLfH-stPD&@qU13_c7ZS(n)U{$Be>AS1<?5H
zKt3~?7>GLos$UUJ4k`>66$G-d`QiXnVFFYo3y=oc!vW<>Kxs*+IFt*g6rhGm!9^ep
zbo+PM0L48Fzw@&~73!6wR+KR46=xKe6qO_<0a=x~5E{ZqGY=ORWDg6&$N$*mnX$yM
iFi@cY7IB8+qGbJ&qS90_p_f>k%Mf2&l2}v%H5dR;ogOs+

literal 0
HcmV?d00001