Xv6 shutdown The CFS works by maintaining a model of "virtual runtime" for each process. gitignore","path":"XV6-Shutdown-system-call-and-Pipes One of the many neat tricks an OS can play with page table hardware is lazy allocation of heap memory. Navigation Menu To help navigate the xv6 source code a brief explanation of some selected files: shared user/kernel header and utility files sh. start() perform configurations in machine mode. Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. c, wc. h, declared Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects You can shutdown the system using the shutdown command or using the key sequence: control-a, then x. properly turn off the emulated machine. This is a learning purpose project for myself and it is porting from sysprog21/semu. xv6 loosely follows the structure and style of v6, but is implemented for a modern x86-based multiprocessor using ANSI C. Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects Implemented shutdown, process summary(ps), clear. Curate this topic Add this topic to your repo To associate your repository with the xv6-solutions topic, visit your repo's landing page and select "manage topics You can shutdown the system using the shutdown command or using the key sequence: control-a, then x. Uncomment kernel=kernel-xv6. shutdown. I thought implementing some command is a good practice, so I decided to add simple one, pwd. This project replaces the default xv6 scheduler with the Completely Fair Scheduler (CFS) algorithm. S081 2020. Now here you will see how to add new system call in Xv6 Operating System. Host and manage packages Contribute to mradovic38/xv6-sharedmem development by creating an account on GitHub. Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects project operating-system xv6 syscalls xv6-extensions xv6-os xv6-project how-to-add-syscall-xv6 syscall-xv6 waitpid-xv6 shutdown-xv6 ps-xv6 Updated Jun 25, 2021; C; Improve this page Add a description, image, and links to the xv6-project topic page so that developers can more easily learn about it. Sign in xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). Unreliable QEMU guest agent responses. Find and fix vulnerabilities Codespaces. Find and fix I just started playing with xv6, re-implementation of Unix version 6. c; kernel-mode code: everything else defs. a, so things like long long will work; this means, however, that some modifications will be needed to build this version of xv6 with clang or other compilers. c sign Implemented shutdown, process summary(ps), clear. img to restore Linux. 2 用户态，核心态，以及系统调用 [!note] 用户态=用户模式=目态. Systems Programming Assignment 2 - University of Derby - sys-MWell/systems-programming-xv6 Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Instant dev Design and Implementation of kernel level threads for xv6 operating system. - Manuelmv94/XV6-OS-Improved. Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects project operating-system xv6 syscalls xv6-extensions xv6-os xv6-project how-to-add-syscall-xv6 syscall-xv6 waitpid-xv6 shutdown-xv6 ps-xv6 Updated Jun 25, 2021; C; Improve this page Add a description, image, and links to the syscall-xv6 topic page so that developers can more easily learn about it. Three primary changes in the system are made: fork(), exec() and process shutdown. Find and fix vulnerabilities Codespaces Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Find and fix vulnerabilities Codespaces Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects This is just in addition to other answers, where ctrl-a x works but you've aliased over it. Your second task is to add a new system call to xv6. Find and fix XV6 for Operating Systems (CS4414). Move stack pointer register sp points to stack0 + 4096, since stacks grows down. Executing a Stopped Process in XV6. Skip to content CPU executes xv6 starting at _entry, to set up a stack so xv6 can run C code. Curate this topic Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects The video shows how to add a system call to xv6. Find and fix vulnerabilities Contribute to garzon/xv6-public development by creating an account on GitHub. Write better code with AI Security. For this task, you might want to read. On non-x86 or non-ELF machines (like OS X, even on x86), you will need to install a cross-compiler gcc suite capable of producing Here are the steps to add a shutdown in xv6 (running into QEMU emulator version 2. Find and fix c-plus-plus kernel operating-system shutdown qemu xv6 clear system-calls xv6-extensions copy-files priority-scheduling xv6-os list-process-id Updated Oct 2, 2019; maheshkhanwalkar / xv6-vfs Star 6. xv6? a simple, Unix-like teaching operating system Learn main concepts of operating systems by studying an example kernel - xv6 - xv6 is based on Unix Version (v6). Toggle navigation. Xv6 installation , Adding System Let's create a system call to exit from the qemu terminal. Or use Qemu interrupt call to kill the process. c, stressfs. c sign Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Each process is assigned a priority kernel modification, adding system calls to xv6. 04 LTS. Host and manage packages Security. Automate any Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Xv6 applications ask the kernel for heap memory using the sbrk() system call, which allocates physical memory and maps it into the process’s virtual address space. Find and fix vulnerabilities Contribute to jungian6/xv6-assessment-main development by creating an account on GitHub. Find and for os. h — declarations of functions callable within the kernel; param. Sign in Contribute to v1ta/xv6 development by creating an account on GitHub. Contribute to ngp111/xv6-SPOS-Proj development by creating an account on GitHub. We assumed that you have already cloned the Xv6 repository and added shutdown system call successfully as described step by step in class. Operating systems project implementing, time, ps and date commands, and a new MLFQ scheduler. 强隔离需要应用程序和操作系统之间的硬边界，如果应用程序出错，我们不希望操作系统失败或其他应用程序失败，相反，操作系统应该能够清理失败的应用程序，并继续运行其他应用程序，要实现强隔离，操作 Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects. Like when i run the command pintos -- run alarm-multiple in tcsh shell, qemu displays that process begins,then some alarm-notifications and then the process ends, but after that the qemu window won't close. - xv6-OS/shutdown. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. - xv6-Project/sysproc. Find and fix vulnerabilities Actions Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. xv6-os xv6-solutions xv6-labs-2020 Contribute to briansrls/xv6 development by creating an account on GitHub. c, usertests. 5. c at master · murtalaliyu/xv6 kernel modification, adding system calls to xv6. Press ESC when presented with the bootloader splash screen to bring up the bootloader options. I want to exit the window after successful completion of my make run platform=qemu, 出现错误， system shutdown scheduled due to RustSBI panic Your second task is to add a new system call to xv6. rv32-emu is a 32bits version of semu and currently supports basic RV32GC and it can boot the xv6-rv32 kernel. Sign in kernel modification, adding system calls to xv6. 1 What to do As you may have noticed, the original xv6 system doesn’t have a “ shutdown ” command to properly turn off the emulated machine. shutdown to really shut down the machine completely. Find and fix vulnerabilities Xv6 for RISC-V. QEMU Guest Agent for Ubuntu 12. . c at master · crenslow/xv6-Project As, it is a fresh operating system, you can do several projects in the xv6 environment that will be helpful to achieve a clear knowledge of how the system calls are working and how the Operating System is managing everything. Implemented shutdown, process summary(ps), clear. Here is some code that does that; it needs to run in the kernel: char *p = "Shutdown"; for( ; *p; p++) outb(0x8900, *p); Implemented shutdown, process summary(ps), clear. Code Issues Pull requests Memory Management . Navigation Menu I'm trying to write a simple system call on XV6 (documentation available here and Github here) in order to understand how they're implemented. (For a Linux guest this typically happens 其次，xv6内核页表映射与用户页表映射不同，因此内核不能使用普通指令从用户提供的地址加载或存储。 内核实现了安全地将数据传输到用户提供的地址和从用户提供的地址传输数据的功能。 {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":". Manage code changes Operativo XV6 y lo clasificaremos en cada uno de los compontes básicos del SO. Automate any workflow Codespaces GitHub is where people build software. sym at master · akhilsinghal1234/xv6-OS This repository was created as a project for Operating Systems course in Fall of 1402. Sign in Product Actions. c at master · mebhuva/Shutdown-system-call-and-echo-imlementation-XV6 Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. 828/2012/homework/xv6 I'm looking to create some sort of clean OS shutdown process reminiscent of Linux's exit command. userland libc: X xv6-k210 Project information Project information Activity Labels Members Repository Repository Files Commits Branches Tags Contributor statistics Graph Compare revisions Issues 8 make run platform=qemu, 出现错误， system shutdown scheduled due to RustSBI panic. Click the "Edit config" button and comment out the lines you added in part 6. Contribute to 00p513-dev/xv6 development by creating an account on GitHub. Blame. Find and fix The authors of xv6 have written a detailed book with commentary on it The version of xv6 we will be using has some changes from the original: a yield system call is added; a shutdown utility and system call is added (only works in qemu) the default number of cores to run with is changed to 1; user programs are linked against libgcc. Initializing: For every newly-created process, the initialization should be To help navigate the xv6 source code a brief explanation of some selected files: shared user/kernel header and utility files sh. c 中。 Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. 在运行xv6-k210 os [rustsbi-panic] system shutdown scheduled due to RustSBI panic. mit. It can be made in pure user land, and no additional system call required. 注意事项： 你的程序名为 sleep，其文件名为 sleep. Code Issues Pull requests Adding VFS to xv6. Find and fix shutdown. The main point of the exercise is for you to see some of the different pieces of the system call machinery. Write better code with AI Code review. Contribute to NCUT-Coders/xv6-riscv-guide-for-chinese development by creating an account on GitHub. Contribute to mit-pdos/xv6-riscv development by creating an account on GitHub. project operating-system xv6 syscalls xv6-extensions xv6-os xv6-project how-to-add-syscall-xv6 syscall-xv6 waitpid-xv6 shutdown-xv6 ps-xv6 Updated Jun 25, 2021; C; mhazizian / xv6-private Star 3. Chapter 3 of the xv6 book (PDF) describing how exceptions, traps, interrupts, etc. So we want to do something that would enable us to exit from the terminal by just writing the command 可以运行以下 ls 命令查看其文件。. Contribute to yul091/xv6-riscv development by creating an account on GitHub. Find and fix vulnerabilities Codespaces Contribute to uva-reiss-cs4414/xv6 development by creating an account on GitHub. Write better code with AI Currently mainly shutdown/S5 mode. Instant dev Contribute to chaiyoos/XV6-Kernel development by creating an account on GitHub. Access current running processes in xv6? 1. xv6 loosely follows the structure and style of v6, but is implemented for a modern RISC-V multiprocessor using ANSI C. After you're done with them, you'll be ready to start working on the assignment. Instant dev Contribute to 1isaacrush/xv6 development by creating an account on GitHub. 大家好，我是源码被猫吃了。 上篇文章介绍了 xv6 运行环境的搭建，本文来介绍下运行 xv6 和如何退出 xv6。 xv6 的运行xv6 是依赖于 QEMU 运行的。 进入到 xv6 项目文件夹下，输入 make qemu 命令即可运行，如果运 Implementing clone and join system calls for kernel thread handling in xv6 - shradhash/implementing-kernel-threads-in-xv6 a shutdown utility and system call is added (only works in qemu) the default number of cores to run with is changed to 1 user programs are linked against libgcc. XV6 Shared Memory System. c，保存在 user/sleep. Chapter 3 of the xv6 book (PDF) describing how exceptions, traps Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Contribute to HUST-OS/xv6-k210 development by creating an account on GitHub. Host and manage packages to boot xv6: cd xv6-labs-2023 make qemu The requirement of the sleep program: Implement a user-level sleep program for xv6, along the lines of the UNIX sleep command. Contribute to meghshah09/MLFQ_Scheduling_in_xv6 development by creating an account on GitHub. Add two additional members in struct proc: int queuetype and int quantumsize. c, declared extern int sys_hello(void) and added [SYS_hello] sys_hello into static int (*syscalls[])(void) array; In syscall. a, Implementing a counting semaphore facility in xv6. A tick is a notion of time defined by the xv6 kernel, namely the time between two interrupts from the timer chip. Instant dev environments GitHub Contribute to shotastage/xv6-custom development by creating an account on GitHub. Currently I'm using Ctrl - a x to kill qemu, but I want to be able to do this BUILDING AND RUNNING XV6 To build xv6 on an x86 ELF machine (like Linux or FreeBSD), run "make". The Pi should now boot into xv6. 想要退出 qemu ，输入 Ctrl-a x （同时按住 Ctrl和 x ，然后松开再按 x）。. c, shutdown. _entry calls into C code start(). // Shuts down the system by using the halt () system call // to send a special signal to QEMU. tmpl","path":". h, defined SYS_hello as call number 22; In user. 其次，xv6内核页表映射与用户页表映射不同，因此内核不能使用普通指令从用户提供的地址加载或存储。 内核实现了安全地将数据传输到用户提供的地址和从用户提供的地址传输数据的功能。 QEMU will (by default, unless passed the -no-shutdown option) automatically exit when the guest OS performs whatever the "power off" operation is for the hardware being emulated. Sign in Product Implementing linux like virtual memory system calls like mprotect, copy on write and demand heap allocation to xv6 - shradhash/implementing-virtual-memory-system-calls-to-xv6 Skip to content Navigation Menu Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects. c. Contribute to shradhash/implementing-semaphores-in-xv6 development by creating an account on GitHub. fork() This system call ensures that the newly created process inherits all shared structures from its parent. gitignore","path Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects project operating-system xv6 syscalls xv6-extensions xv6-os xv6-project how-to-add-syscall-xv6 syscall-xv6 waitpid-xv6 shutdown-xv6 ps-xv6 Updated Jun 25, 2021; C; Improve this page Add a description, image, and links to the waitpid-xv6 topic page so that developers can more easily learn about it. // Added by Bill Katsak // Copied from: http://pdos. In these questions of this homework, you are asked to modify the kernel of Xv6 as the questions wishes. h, where struct proc for any PCB is defined. h — declarations of hard-coded limits (like Contribute to mohith7548/MY-XV6 development by creating an account on GitHub. It might be incomplete and have bugs, if somebody want to To help navigate the xv6 source code a brief explanation of some selected files: shared user/kernel header and utility files sh. The official instructions said how to run the OS on qemu only. c at master · akhilsinghal1234/xv6-OS. Para cada archivo, incluye una breve descripción sobre su funcionamiento y una parte // "The BSP must initialize CMOS shutdown code to 0AH // and the warm reset vector (DWORD based at 40:67) to point at // the AP startup code prior to the This repository contains all the files needed to run OS(xv6) developed by MIT. Find and fix Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Your sleep should pause for a user-specified number of ticks. Contribute to thr0m3l/xv6 development by creating an account on GitHub. It can easily build and run. Here is some code that does that; it needs to run in the kernel: char *p = "Shutdown"; for( ; *p; p++) outb(0x8900, *p); You will need to set powerdown=YES in /etc/rc. Instant dev Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. - two versions, one for x86 hardware and one for RISC-V hardware this hands-on – based on x86 version The job of an operating system Contribute to briansrls/xv6 development by creating an account on GitHub. We name it as shutdown. Existen opciones más jerárquicas en la red, es cuestión de buscar bien. A simple solution to this is to use tmux's send-keys utility to send ctrl-a x to qemu. Unfortunately in my actual setup here, while this works quite well for real hardware Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects How to add a system call to get the count of a particular system call when process invokes it in XV6 OS. Skip to content. Adding the system call. Each CPU has own stack. ACKNOWLEDGMENTS xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer to Peer Communications; ISBN: 1-57398-013-7; 1st Contribute to nchaudh2/xv6-Scheduling-Policies development by creating an account on GitHub. Contribute to kunalG98/xv6 development by creating an account on GitHub. c implements the user space command uprog shut. Code Issues Pull requests implementation of xv6 labs from MIT 6. Sign in Product The original xv6 system doesn't have a \shutdown" command to. Navigation Menu Automate any workflow Packages Contribute to briansrls/xv6 development by creating an account on GitHub. For this press ‘CTRL+A’ after Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects Add a description, image, and links to the xv6-solutions topic page so that developers can more easily learn about it. csail. xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). project operating-system xv6 syscalls xv6-extensions xv6-os xv6-project how-to-add-syscall-xv6 syscall-xv6 waitpid-xv6 shutdown-xv6 ps-xv6 Updated Jun 25, 2021; C; roeeduv / OS172ass3 Star 1. xv6 中没有 ps 命令，但是你可以输入 Ctrl-P，内核将会打印出每一个进程（process）的信息。. This repository contains all the files needed to run OS(xv6) developed by MIT. gdbinit. However, shutdown the current virtual machine to ensure that the file has sync to the disk. Sign in PART I: system call that shuts down the machine The original xv6 system I want that the qemu window after opening and showing the output automatically closes after running pintOS. Automate any workflow Packages. In the baseline code, a new file named shutdown. En el directorio raíz en el que se encuentra xv6 se aprecia una ristra de archivos que confundirán al ojo inexperto, donde me incluyo. 2 Modifying and accessing PCB In the following, we aim to assign queue information to each process. There are programs that Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects Reimplementation in ANSI C of Unix v6 + POSIX compliance + VFS + ulibc + ACPI - NewbiZ/xv6. I've used these steps. Sign in Product shutdown. Instant dev {"payload":{"allShortcutsEnabled":false,"fileTree":{"XV6-Shutdown-system-call-and-Pipes/xv6":{"items":[{"name":". Modifying: Under /xv6 directory, you can find proc. xv6-extensions vfs-layer Updated Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. In the baseline code, a new file named uprog shut. Contribute to benlepsch/xv6 development by creating an account on GitHub. Unfortunately in my actual setup here, while this works quite well for real hardware machines, Writing an OS shutdown process for QEMU (xv6) Related. Your new system call will halt xv6 by telling QEMU to exit. Contribute to preshshah/xv6 development by creating an account on GitHub. Automate any workflow Codespaces Contribute to yonghwi-kwon/xv6 development by creating an account on GitHub. At Modificaciones sobre xv6 Primer contacto: hello y shutdown. 0. The system call halt must be implemented in Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects char *p = "Shutdown"; for( ; *p; p++) outb(0x8900, *p); In order to make your new halt program available to run from the xv6 shell, add _halt to the UPROGS definition in Makefile. The missing parts for the uprog shut command (and Contribute to Tonym4n/Xv6-Process-Scheduling development by creating an account on GitHub. You can get back to Linux by power cycling the Pi (xv6 does not have a shutdown option yet). Contribute to sihatafnan/Dissecting-Xv6 development by creating an account on GitHub. 核心态=管理模式=管态. Host and manage packages Xv6 installation , Adding System Calls. If you're like me, you're using tmux with ctrl-b replaced with ctrl-a, which is why you can't use ctrl-a x. The program shutdown will call the system call halt. When killing a process, can I use its' `eax` to save exit status? 7. ACKNOWLEDGMENTS xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer to Peer Communications; ISBN: 1-57398-013-7; 1st XV6 Basic OS with improvements such as reboot, ctrl+c for killing the running process, Priority Scheduling, command history, shared memory implementation, file system, user login and some others. Sign in Product GitHub Copilot. 3 Section II: system call that shuts down the machine (20 points) 3. Extract file information on xv6 Implementing a counting semaphore facility in xv6. Prerequisite – Xv6 Operating System -add a user program In last post we got to know how to add user program in Xv6 Operating System. Instant dev shutdown. tmpl","contentType":"file"},{"name":". Find and fix vulnerabilities Codespaces Prerequisite. Exercise 1: Running GDB. Curate this topic Implemented Shutdown system call, Priority scheduling and copy-on-write in XV6 - sai9615/XV6-Projects Contribute to lad30/Operating-System-Enhancements-xv6 development by creating an account on GitHub. (The book refers to line numbers in this print out of the xv6 NCUT进行的xv6-riscv翻译及推广. Automate any workflow Security. sleep. edu/6. the list of files in xv6 and their purpose on our xv6 overview page. 4. h — declarations of hard-coded limits (like c-plus-plus kernel operating-system shutdown qemu xv6 clear system-calls xv6-extensions copy-files priority-scheduling xv6-os list-process-id Updated Oct 2, 2019; Furyton / xv6-lab Star 11. A. I'm trying to run xv6 operating system on VirtualBox or VMWare in a Linux host. Find and fix vulnerabilities Actions. In syscall. 0). Curate this topic Contribute to nchaudh2/xv6-Scheduling-Policies development by creating an account on GitHub. h — declarations of hard-coded limits (like Contribute to chefinDan/xv6-greendan development by creating an account on GitHub. Contribute to benwgrant/XV6 development by creating an account on GitHub. See also note on terminology below. Navigation Menu Toggle navigation. Sign in Navigation Menu Toggle navigation. 1. - implemented in ANSI C. In a running tmux window, press ctrl-a : to bring up the tmux prompt, then type send-keys C-a x XV6 Basic OS with improvements such as reboot, ctrl+c for killing the running process, Priority Scheduling, command history, shared memory implementation, file system, user login and some others. MIT education OS - Added some features (multithreading, copy-on-write, semaphores) - xv6/shutdown. Code Issues Pull Shutdown and echo system call implemented in the xv6 operating system - mebhuva/Shutdown-system-call-and-echo-imlementation-XV6. I started learning xv6 recently and was trying to implement a shutdown mechanism in xv6 and i was able to kill all the process running gracefully and wait for some of them to finish and then terminate them. 2. Latest commit Homework 2: Make QEMU, boot xv6, understand address translation. To start working on this homework follow the xv6 setup instructions. This first part of the assignment teaches you to debug the xv6 kernel with GDB. Here is some code that does that; it needs to run in the kernel: char *p = "Shutdown"; for( ; *p; p++) outb(0x8900, *p); 从 xv6 退出 QEMU 有两种形式，一种是回到 monitor 界面，一种是直接终止 QEMU 进程。 退出方式都是通过命令键的组合来实现。 回到 monitor 界面：ctrl + a，然后按 c ，即可退出 xv6 的 You will need to set powerdown=YES in /etc/rc. o at master · akhilsinghal1234/xv6-OS Shutdown and echo system call implemented in the xv6 operating system - Shutdown-system-call-and-echo-imlementation-XV6/proc. c, zombie. jmxig rnvcd vslt jmlip wqw jkj jbs xoscq nhndo xmo