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extern crate docopt;
extern crate rustc_serialize;
extern crate rustv;
use std::fs::File;
use std::io::Read;
use std::rc::Rc;
use std::cell::RefCell;
use docopt::Docopt;
use rustv::elfloader;
use rustv::isa;
use rustv::memory;
use rustv::memory::MemoryInterface;
use rustv::memory::Mmu;
use rustv::register_file;
use rustv::simulator;
use rustv::syscall;
use rustv::trap;
const USAGE: &'static str = "
cacheracer - A F/OSS implementation of the CS 3410 CacheRacer
Usage:
cacheracer <program1> <program2>
Options:
-h --help Show this screen.
--version Show version.
";
#[derive(Debug, RustcDecodable)]
struct Args {
arg_program1: String,
arg_program2: String,
}
struct MemoryTracker {
memory: memory::Memory,
program1_byte: u8,
program2_byte: u8,
program1: usize,
program2: usize,
}
impl memory::MemoryInterface for MemoryTracker {
fn latency(&self) -> u32 {
self.memory.latency()
}
fn step(&mut self) {
self.memory.step();
}
fn read_word(&mut self, address: isa::Address) -> memory::Result<isa::Word> {
self.memory.read_word(address)
}
fn write_word(&mut self, address: isa::Address, value: isa::Word) -> memory::Result<()> {
let original = self.memory.read_word(address);
let result = self.memory.write_word(address, value);
if let Ok(original) = original {
if let Ok(()) = result {
let p1b = self.program1_byte as u32;
let mut p1orig = 0;
let mut p1new = 0;
if original & 0xFF == p1b { p1orig += 1; }
if (original >> 8) & 0xFF == p1b { p1orig += 1; }
if (original >> 8) & 0xFF == p1b { p1orig += 1; }
if (original >> 8) & 0xFF == p1b { p1orig += 1; }
if value & 0xFF == p1b { p1new += 1; }
if (value >> 8) & 0xFF == p1b { p1new += 1; }
if (value >> 8) & 0xFF == p1b { p1new += 1; }
if (value >> 8) & 0xFF == p1b { p1new += 1; }
self.program1 += p1new - p1orig;
let p2b = self.program2_byte as u32;
let mut p2orig = 0;
let mut p2new = 0;
if original & 0xFF == p2b { p2orig += 1; }
if (original >> 8) & 0xFF == p2b { p2orig += 1; }
if (original >> 8) & 0xFF == p2b { p2orig += 1; }
if (original >> 8) & 0xFF == p2b { p2orig += 1; }
if value & 0xFF == p2b { p2new += 1; }
if (value >> 8) & 0xFF == p2b { p2new += 1; }
if (value >> 8) & 0xFF == p2b { p2new += 1; }
if (value >> 8) & 0xFF == p2b { p2new += 1; }
self.program2 += p2new - p2orig;
}
}
result
}
}
struct SyscallHandler<'a> {
memory: memory::SharedMemory<'a>,
}
impl<'a> syscall::SyscallHandler for SyscallHandler<'a> {
fn syscall(&mut self, registers: &mut register_file::RegisterFile) -> Option<trap::Trap> {
println!("Syscall number {}", registers.read_word(isa::Register::X10));
let mut base = registers.read_word(isa::Register::X11);
let mut string = vec![];
loop {
let c = self.memory.borrow_mut().read_byte(base);
if let Ok(0x00) = c {
break;
}
else if let Ok(c) = c {
string.push(c);
}
base += 1;
}
let result = std::str::from_utf8(&string);
if let Ok(string) = result {
println!("{}", string);
}
else {
println!("Error printing string: {:?}", result);
}
None
}
}
fn load_program<T: memory::Mmu>(memory: &mut memory::Memory,
mmu: &T, path: &str) -> isa::Address {
let mut f = File::open(path).unwrap();
let mut buffer = Vec::new();
f.read_to_end(&mut buffer).unwrap();
let elf = elfloader::ElfBinary::new("test", &buffer).unwrap();
let start = elf.file_header().entry as isa::Address;
for p in elf.section_headers() {
let name = elf.section_name(p);
if name == ".text" || name == ".sdata" || name == ".rodata" {
memory.write_segment(mmu, elf.section_data(p), p.addr as usize);
}
}
start
}
fn main() {
let args: Args = Docopt::new(USAGE)
.and_then(|d| d.decode())
.unwrap_or_else(|e| e.exit());
let mmu = memory::IdentityMmu::new();
let mmu2 = memory::ReverseMmu::new(0x8000);
let mut memory = memory::Memory::new(0x10000);
let start1 = load_program(&mut memory, &mmu, &args.arg_program1);
let start2 = load_program(&mut memory, &mmu2, &args.arg_program2);
let mut memory = MemoryTracker {
memory: memory,
program1_byte: 0x43,
program2_byte: 0x42,
program1: 0,
program2: 0,
};
let memory_ref = Rc::new(RefCell::new(memory));
let cache = memory::DirectMappedCache::new(4, 4, memory_ref.clone());
let cache_ref = Rc::new(RefCell::new(cache));
let core = simulator::Core::new(
start1, 0x1000,
cache_ref.clone(), Box::new(mmu));
let core2 = simulator::Core::new(
start2, 0x1000,
cache_ref.clone(), Box::new(mmu2));
let cores = vec![core, core2];
let system = SyscallHandler { memory: memory_ref.clone(), };
let mut simulator = simulator::Simulator::new(
cores, memory_ref.clone(), system);
simulator.run();
println!("Program 1 bytes written: {}", memory_ref.borrow().program1);
println!("Program 2 bytes written: {}", memory_ref.borrow().program2);
}
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