What is the difference between the code that was used to run programs in project 1 and project 2?

How does a user program (as a file on the disk) become a thread?

When you run the args-none test, how come the user programs does not print anything?

Change the *esp pointer to ignore command line args for now (change line 441 in process.c to *esp = PHYS_BASE - 12;) and add an infinite loop to process_wait, what is the output now and why?

In the previous question, we saw that a system call occurred. Trace args.c and identify how the code reached the syscall_handler.

1. Which line in args.c calls functions that make a syscall?

2. Where is the code on the user side that invokes the syscall using an interrupt (trap)?

Run the args-none user program with GDB and put a breakpoint at syscall.c line 18. Continue the code to the breakpoint. Then using the ‘x’ command in GDB (use help x to view manual for the command), identify the items on the stack frame. You should refer to the write syscall specification in the project 2 handout.