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Write a main program that uses these system calls to echo the typed characters. The pseudo code will look something like:
void traphandler () {
if (R0 == 0) { // read system call
R1 = getchar(); // poll the status register of the IO terminal until a char is available then load it into R1
} else if (R0 == 1) { // write system call
putchar(R1); // just store R1 to memory location 0xfff0
}
enableInterrupts();
void main() {
char c;
while (1) {
c = read(); // set R0 to 0 can issue the 'trap' instruction, result will be in R1
write(c); // set R0 to 1 and set R1 to 'c' and issue the 'trap' instruction
Relationship between an Array and Pointers. Consider the following. int arr[] = {0,1,2,3,4,5,6,7,8,9}; If we write arr , it is considered as the address of the first elem
Aim: To implement a program to maintain information of employees in an educational institute using inheritance. Code: class staff {
how to pass array
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Imagine that the server program is a setuid program owned by the root, then after you penetrate the program with a shell running, you become the ROOT and you can remove the whole f
What does throw; (with no exception object after the throw keyword) mean? Where would I employ it? A: You should see code that looks something like this: class MyException
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