Lab4

In this lab, we write function binary_search in RISC-V. The prototype of the function and an implementation in C is at the end of this page. Translate the C code at the bottom of the page to RISC-V assembly code. The skeleton code is in lab4.s. Function binary_search is located at the end of the file. It is empty in the skeleton code. There are some constraints/tips. 1. To ensure we do not use pseudoinstructions, we turn off the feature in RARs. In Settings, uncheck "Permit extended (pseudo) instructions and formats". 2. Follow the C code closely. Although binary search is simple, it is very easy to make mistakes if you have not written it many times. 3. We keep variable left in register s1. Other local variables do not have to be in a saved register. Think about why we need to keep left, but not other variables, in a saved register. 4. There should be only one exit (one return instruction) in the function. In the C code, we use goto f_exit on purpose. With one exit, we do not have…

please fill up the table shown in images with right answers  Assuming mycmd is an executable file, you type “mycmd this is cs288” and hit enter. Show the contents of memory for argc, argv, intermediate pointers, and the parameters in the memory map. Use arrows to indicate the relationship between them.

a) Give an example of a one-byte instruction available in SIC/XE. b) Give one disadvantage of hashing over binary search trees for implementing symbol tables. c) In a load module, why is it better to have a checksum in each text record (T-record) instead of one checksum after all the T-records? d) What is the purpose of the super block in the Unix file system?

Please write in C/C++Write a program that spawn 2 thread: a producer and a consumer The producer thread MUST open an input file and repeatedly copy values to a CIRCULAR BUFFER The consumer should open an output file and repeatedly copy values from the same circular buffer to the file. If the producer is unable to write to the buffer (because it does not contain enough empty elements), or if the consumer is unable to read from the buffer (because it does not contain enough unread items), then it should proceed to the next iteration, choosing a new random number of bytes to copy.

Part 1: Preliminary Summarize the difference between binary machine language, assembly language, and high-level source files like C. Contrast the difference between a compiler, assembler, and linker What is the difference between the data segment and the text segment of in an assembly language program? What register is used as the stack pointer? What is a ebreak instruction in the sample program? How would you define a constant named 'BLUE' and assign it to the value OX00F in assembly language? Describe how to implement the psuedo-instruction li t1, e using a native instruction.

Describe the effects on Unix data structures of using the open() function with device files. What is the behaviour of a read() system call for a device in terms of Unix data structures?

To run COBOL code on z/OS, we right-click and select “Submit Job” on what file? Select one: a. COBOL b. JSON c. JCL d. Parameters

find the smallest, largest,last modified and oldest file in a directory in C language you must use opendir(), readdir() and stat() to select out the specific files matching the stated criteria. Once you have found the 4 targets, then you should list out the files in "long format" similar to what you would see if you did an "ls -l" for the specific file. Your code should also identify which criteria is being met for each output.

in c++ language, make a stock management system using linked list and file handling. ( Drop code in words , explain the code and also drop the screenshot of output as well )

What is the correct order for converting the source code into an executable file? Answer Choices: a. Preprocessing -> Compiling -> Assembly -> Linking b. Preprocessing -> Linking -> Assembly -> Compiling c. Compiling -> Preprocessing -> Linking -> Assembly d. Compiling -> Preprocessing -> Assembly -> Linking

. Explain the differences between stream socket and datagram socket with diagram.  java

Language: Python Goal: implement decryption in the attached code block   import argparse import os import time import sys import string   # Handle command-line arguments parser = argparse.ArgumentParser() parser.add_argument("-d", "--decrypt", help='Decrypt a file', required=False) parser.add_argument("-e", "--encrypt", help='Encrypt a file', required=False) parser.add_argument("-o", "--outfile", help='Output file', required=False)   args = parser.parse_args()   encrypting = True   try:     ciphertext = open(args.decrypt, "rb").read()     try:         plaintext = open(args.encrypt, "rb").read()         print("You can't specify both -e and -d")         exit(1)     except Exception:         encrypting = False except Exception:     try:         plaintext = open(args.encrypt, "rb").read()     except Exception:         print("Input file error (did you specify -e or -d?)")         exit(1)   def lrot(n, d):     return ((n << d) & 0xff) | (n >> (8 - d))   if encrypting:     #…

Object code files are generated by compilers and assemblers from source code. The object files need to be linked together before they can be executed. Compilers could, in principle, produce executables without linking. Can you explain the problems with the second method?

Write a C program which takes four command line arguments: two file names and twonumber of elements. Your program must check if correct number of arguments aresupplied and terminate if not. Your main process must create three processes: The firstand second processes must open / create files by the given names and fill them with thegiven number of random integers (one integer per line) and terminate. The thirdprocess must execute “sort” command with necessary arguments so that it numericallysorts both files and display the combined result on screen.Before creating the third child process, main process must wait for the other two child processes to end.

Assembly Language x86: (Micro Macro):  templet: .386.model flat, stdcall.stack 4096ExitProcess PROTO, dwExitCode: DWORD.data .codemain PROC main ENDPINVOKE ExitProcess, 0END main Question: What are the reults (in decimal) of the following operations? A: 1111001000101111 multiplied by 0000001011010010 (these are signed numbers) B: 01011110110101101010010100101001 devided by 1111111111011010 (these are signed number)(hint: use idiv (signed), div (unsigned) )       Examples: Multiply: mul bx, 10000 mov ax, 355       mul bx,                                       shl edx, 16     mov dx, ax            Division:mov eax, 2000000      mov bx, 500mov edx, eax         shr edx, 16            div bx,

What is the maximum file size supported if we have 12 direct blocks, 3 indirect blocks, 3 double indirect blocks, and triple indirect block, a block size of 1024 bytes and 16-bit pointers ?

Write in g++  Design and implement a simple, interactive shell program that prompts the user for a command, parses the command, and then executes it with a child process. In your solution you are required to use execv(), which means that you will have to read the PATH environment, then search each directory in the PATH for the command file name that appears on the command line.

Using python, write a program that does the following: when give a data set through a numeric file (such as a .csv file), assuming a Gaussian data distribution, write a script that returns skewness, kurtosis, recursive partitioning, and process capability.

A compiled program can be supplied as an executable file. An executable file is a file that is ready to run. Since an executable file cannot be run, programmers prefer to supply executables rather than source code. What is this executable file and what differentiates it from the source code? In the Python programming language, the process of source code translation is different from that in C programming, explain

A binary executable file built with dynamic linking includes a call to printf(). The memory address of printf in the code... Cannot be known, it's a macro. Will be only determined at execution - it can be anything. Is recorded as a parameter for the CALL instruction. Is always stored in a register. Depends on the version of libc that compiler knows about.

From Operating System Concepts By Gagne, Galvin, Silberschatz. 10th edition Chapter 2 Project, implementation has to be in C: This assignment will involve designing two kernel modules: 1. Design a kernel module that creates a /proc file named /proc/jiffies that reports the current value of jiffies when the /proc/jiffies file is read, such as with the command cat /proc/jiffies. Be sure to remove /proc/jiffies when the module is removed. 2. Design a kernel module that creates a proc file named /proc/seconds that reports the number of elapsed seconds since the kernel module was loaded. This will involve using the value of jiffies as well as the HZ rate. When a user enters the command cat /proc/seconds your kernel module will report the number of seconds that have elapsed since the kernel module was first loaded. Be sure to remove /proc/seconds when the module is removed.

Computer organization and assembly language Please help me with this. I have to write line by line what each line of codes does. CODE IS BELOW: .model small  .386  .stack 100h    .data  msg1 db 13, 10, "Enter any number --> ", "$" msg2 db  "Enter an operation +,- * or /  --> ",13, 10, "$" msg3 db  "The Operation is --> ", "$" msg4 db  "The result is --> ", "$" By_base dd 21 by_10 dd 10  ; 32 bits variable with initial value = 10 sp_counter db 0 ; 8 bits variable with initial value of zero disp_number dd 0 ; 32 bits variable with initial value = 0 disp_number2 dd 0 disp_number3 dd 0 op_type db 0 last_key dd 0 ; 32 bits variable with initial value of zero remainder db 0 .code    main proc mov ax,@data;set up datasegment movds,ax         mov dx,offset msg1 call display_message   callm_keyin   calloperation mov dx,offset msg1 calldisplay_message   callm_keyin cmpop_type, "+" jnz short skip_plus   callop_plus   skiP_plus: cmp op_type, "-" jnz short skip_minus callop_minus…

how do is fix this error in vs code crbug/1173575, non-js module files deprecated.

If you have experience with a language like C, C++, or Rust, in which dynamically allocated space must be manually reclaimed, describe your experience with dangling references or memory leaks. How often do these bugs arise? How do you find them? How much effort does it take? Learn about open-source or commercial tools for finding storage bugs (Valgrind is a popular open-source example). Do such tools weaken the argument for automatic garbage collection?

When do you use primitives like load linked and store conditional? 1. When cooperating threads of a parallel program need to synchronize to get proper behavior for reading and writing shared data 2. When cooperating processes on a uniprocessor need to synchronize for reading and writing shared data

167. The file organization which allows us to read records that would satisfy the join condition by using one block read is a. Heap file organization b. Sequential file organization c. Clustering file organization d. Hash file organization

Explain the special relationship between while loops and file handles in Perl. What is the meaning of the empty file handle, <>?