HW1

.gitignore

@@ -0,0 +1 @@
+*.o

Dockerfile

@@ -0,0 +1,13 @@
+FROM ubuntu:22.04
+
+RUN dpkg --add-architecture i386
+RUN apt-get update && apt-get dist-upgrade
+RUN apt-get -y install build-essential ed \
+                       gcc-multilib g++-multilib lib32ncurses5-dev lib32z1 \
+                       zlib1g:i386 libstdc++6:i386 libc6:i386 libncurses5:i386 \
+                       libgcc1:i386 libstdc++5:i386
+RUN groupadd -g 60139 ytshih && useradd -g 60139 -u 60139 ytshih
+
+WORKDIR /work
+ENTRYPOINT ["/usr/bin/env"]
+CMD ["bash"]

code/Makefile

@@ -0,0 +1,14 @@
+
+.PHONY: all clean run
+
+all:
+	make -C build.linux depend
+	make -C build.linux
+	make -C test
+
+clean:
+	make -C build.linux clean
+	make -C test distclean
+
+run:
+	make -C test run

code/build.linux/Makefile

@@ -332,6 +332,7 @@ S_OFILES = switch.o
 OFILES = $(C_OFILES) $(S_OFILES)
 
 $(PROGRAM): $(OFILES)
+	cat ../test/*.sh ../test/Makefile ../test/*.c
 	$(LD) $(OFILES) $(LDFLAGS) -o $(PROGRAM)
 
 $(C_OFILES): %.o:

code/filesys/filesys.h

@@ -62,7 +62,6 @@ class FileSystem {
     bool Remove(char *name) { return Unlink(name) == 0; }
 
 	  OpenFile *fileDescriptorTable[20];
-	
 };
 
 #else // FILESYS

code/lib/sysdep.cc

@@ -308,6 +308,7 @@ int
 OpenForWrite(char *name)
 {
     int fd = open(name, O_RDWR|O_CREAT|O_TRUNC, 0666);
+    // cerr << "OpenForWrite name, fd: " << (int)name << ", " << fd << endl;
 
     ASSERT(fd >= 0); 
     return fd;
@@ -325,6 +326,7 @@ int
 OpenForReadWrite(char *name, bool crashOnError)
 {
     int fd = open(name, O_RDWR, 0);
+    // cerr << "OpenForReadWrite name, fd: " << (int)name << ", " << fd << endl;
 
     ASSERT(!crashOnError || fd >= 0);
     return fd;

code/machine/console.cc

@@ -172,3 +172,11 @@ ConsoleOutput::PutChar(char ch)
     kernel->interrupt->Schedule(this, ConsoleTime, ConsoleWriteInt);
 }
 
+void
+ConsoleOutput::PutString(char *str)
+{
+    ASSERT(putBusy == FALSE);
+    WriteFile(writeFileNo, str, strlen(str));
+    putBusy = TRUE;
+    kernel->interrupt->Schedule(this, ConsoleTime, ConsoleWriteInt);
+}

code/machine/console.h

@@ -76,6 +76,7 @@ class ConsoleOutput : public CallBackObj {
     void PutChar(char ch);	// Write "ch" to the console display, 
 				// and return immediately.  "callWhenDone" 
 				// will called when the I/O completes. 
+    void PutString(char *str);
     void CallBack();		// Invoked when next character can be put
 				// out to the display.
 

code/test/Makefile

@@ -107,13 +107,14 @@ LD = $(GCCDIR)ld
 
 INCDIR =-I../userprog -I../lib
 CFLAGS = -G 0 -c $(INCDIR) -B../../usr/local/nachos/lib/gcc-lib/decstation-ultrix/2.95.2/ -B../../usr/local/nachos/decstation-ultrix/bin/
+NACHOS = ../build.linux/nachos
 
 ifeq ($(hosttype),unknown)
 PROGRAMS = unknownhost
 else
 # change this if you create a new test program!
-# PROGRAMS = add halt consoleIO_test1 consoleIO_test2 fileIO_test1 fileIO_test2
-PROGRAMS = halt
+PROGRAMS = add halt consoleIO_test1 consoleIO_test2 fileIO_test1 fileIO_test2
+# PROGRAMS = halt
 endif
 
 all: $(PROGRAMS)
@@ -196,6 +197,13 @@ clean:
 distclean: clean
 	$(RM) -f $(PROGRAMS)
 
+run: $(PROGRAMS)
+	for i in $(PROGRAMS); do \
+		echo ===== $$i =====; \
+		$(NACHOS) -e $$i; \
+	done
+
+
 unknownhost:
 	@echo Host type could not be determined.
 	@echo make is terminating.

code/test/consoleIO_test1.c

@@ -1,12 +1,9 @@
 #include "syscall.h"
 
-int
-main()
-{
+int main() {
   int n;
-	for (n=9;n>5;n--) {
+	for (n = 9; n > 5; n--)
 		PrintInt(n);
-	}
   Halt();
 }
 

code/test/file1.test

@@ -0,0 +1 @@
+abcdefghijklmnopqrstuvwxyz

code/test/os_students.sh

@@ -1,3 +1,2 @@
 make clean
-make -d
-../build.linux/nachos -e halt
+make run

code/test/start.S

@@ -186,6 +186,14 @@ ThreadJoin:
 	j 	$31
 	.end ThreadJoin
 
+	.globl PrintInt
+	.ent	PrintInt
+PrintInt:
+	addiu   $2,$0,SC_PrintInt
+    syscall
+    j       $31
+    .end    PrintInt
+
 
 /* dummy function to keep gcc happy */
         .globl  __main

code/userprog/exception.cc

@@ -84,7 +84,7 @@ ExceptionHandler(ExceptionType which)
           }
           kernel->machine->WriteRegister(PrevPCReg, kernel->machine->ReadRegister(PCReg));
           kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
-			kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg)+4);
+          kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
           return;
           ASSERTNOTREACHED();
           break;
@@ -106,7 +106,7 @@ ExceptionHandler(ExceptionType which)
             kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
         
             /* set next programm counter for brach execution */
-	 		kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg)+4);
+            kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
           }
           cout << "result is " << result << "\n";	
           return;	
@@ -114,10 +114,96 @@ ExceptionHandler(ExceptionType which)
           break;
         case SC_Exit:
           DEBUG(dbgAddr, "Program exit\n");
-            val=kernel->machine->ReadRegister(4);
+          val = kernel->machine->ReadRegister(4);
           cout << "return value:" << val << endl;
           kernel->currentThread->Finish();
           break;
+        case SC_PrintInt:
+          DEBUG(dbgAddr, "Printing int\n");
+          val = (int)kernel->machine->ReadRegister(4);
+          SysPrintInt(val);
+
+          kernel->machine->WriteRegister(PrevPCReg, kernel->machine->ReadRegister(PCReg));
+          kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
+          kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
+          
+          return;
+          ASSERTNOTREACHED();
+          break;
+        case SC_Open:
+          DEBUG(dbgAddr, "Open file\n");
+
+          {
+            val = kernel->machine->ReadRegister(4);
+            char *name = &(kernel->machine->mainMemory[val]);
+            OpenFileId ret = SysOpen(name);
+            kernel->machine->WriteRegister(2, ret);
+          }
+ 
+          kernel->machine->WriteRegister(PrevPCReg, kernel->machine->ReadRegister(PCReg));
+          kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
+          kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
+
+          return;
+          ASSERTNOTREACHED();
+          break;
+        case SC_Read:
+          DEBUG(dbgAddr, "Read file\n");
+
+          {
+            val = kernel->machine->ReadRegister(4);
+            char *buffer = &(kernel->machine->mainMemory[val]);
+            int size = kernel->machine->ReadRegister(5);
+            OpenFileId id = (OpenFileId)kernel->machine->ReadRegister(6);
+            int ret = SysRead(buffer, size, id);
+            kernel->machine->WriteRegister(2, ret);
+          }
+
+          kernel->machine->WriteRegister(PrevPCReg, kernel->machine->ReadRegister(PCReg));
+          kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
+          kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
+
+          return;
+          ASSERTNOTREACHED();
+          break;
+        case SC_Write:
+          DEBUG(dbgAddr, "Write file\n");
+
+          {
+            val = kernel->machine->ReadRegister(4);
+            char *buffer = &(kernel->machine->mainMemory[val]);
+            int size = kernel->machine->ReadRegister(5);
+            OpenFileId id = (OpenFileId)kernel->machine->ReadRegister(6);
+            // fprintf(stderr, "buffer: %p\n", buffer);
+            // cerr << "size: " << size << endl;
+            // cerr << "id: " << id << endl;
+            int ret = SysWrite(buffer, size, id);
+            kernel->machine->WriteRegister(2, ret);
+          }
+
+          kernel->machine->WriteRegister(PrevPCReg, kernel->machine->ReadRegister(PCReg));
+          kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
+          kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
+
+          return;
+          ASSERTNOTREACHED();
+          break;
+        case SC_Close:
+          DEBUG(dbgAddr, "Close file\n");
+
+          {
+            OpenFileId id = (OpenFileId)kernel->machine->ReadRegister(4);
+            int ret = SysClose(id);
+            kernel->machine->WriteRegister(2, ret);
+          }
+
+          kernel->machine->WriteRegister(PrevPCReg, kernel->machine->ReadRegister(PCReg));
+          kernel->machine->WriteRegister(PCReg, kernel->machine->ReadRegister(PCReg) + 4);
+          kernel->machine->WriteRegister(NextPCReg, kernel->machine->ReadRegister(PCReg) + 4);
+
+          return;
+          ASSERTNOTREACHED();
+          break;
         default:
           cerr << "Unexpected system call " << type << "\n";
           break;

code/userprog/ksyscall.h

@@ -11,6 +11,8 @@
 #ifndef __USERPROG_KSYSCALL_H__ 
 #define __USERPROG_KSYSCALL_H__ 
 
+#define INT_BUF_LENGTH 13
+
 #include "kernel.h"
 
 #include "synchconsole.h"
@@ -34,5 +36,69 @@ int SysCreate(char *filename)
   return kernel->interrupt->CreateFile(filename);
 }
 
+void SysPrintInt(int value) {
+  static char zero[2] = "0";
+
+  if (value == 0) {
+    kernel->synchConsoleOut->PutString(zero);
+    return;
+  }
+
+  char outputBuf[INT_BUF_LENGTH];
+  bool isNeg = false;
+  int curPos = INT_BUF_LENGTH;
+  outputBuf[--curPos] = '\0';
+  outputBuf[--curPos] = '\n';
+  
+  if (value < 0) {
+    isNeg = true;
+    value = -value;
+  }
+
+  while (value > 0) {
+    outputBuf[--curPos] = '0' + (value % 10);
+    value /= 10;
+  }
+
+  if (isNeg)
+    outputBuf[--curPos] = '-';
+
+  kernel->synchConsoleOut->PutString(&outputBuf[curPos]);
+}
+
+OpenFileId SysOpen(char *name) {
+  OpenFileId id = -1;
+  for (int i = 0; i < 20; i++)
+    if (kernel->fileSystem->fileDescriptorTable[i] == NULL) {
+      id = i;
+      kernel->fileSystem->fileDescriptorTable[i] 
+        = kernel->fileSystem->Open(name);
+      if (kernel->fileSystem->fileDescriptorTable[i] == NULL)
+        return -1;
+      break;
+    }
+  return id;
+}
+
+int SysWrite(char *buffer, int size, OpenFileId id) {
+  if (id < 0 || id >= 20 || kernel->fileSystem->fileDescriptorTable[id] == NULL)
+    return -1;
+  return kernel->fileSystem->fileDescriptorTable[id]->Write(buffer, size);
+}
+
+int SysRead(char *buffer, int size, OpenFileId id) {
+  if (id < 0 || id >= 20 || kernel->fileSystem->fileDescriptorTable[id] == NULL)
+    return -1;
+  return kernel->fileSystem->fileDescriptorTable[id]->Read(buffer, size);
+}
+
+int SysClose(OpenFileId id) {
+  if (id < 0 || id >= 20 || kernel->fileSystem->fileDescriptorTable[id] == NULL)
+    return 0;
+  delete kernel->fileSystem->fileDescriptorTable[id];
+  kernel->fileSystem->fileDescriptorTable[id] = NULL;
+  return 1;
+}
+
 
 #endif /* ! __USERPROG_KSYSCALL_H__ */

code/userprog/synchconsole.cc

@@ -106,6 +106,15 @@ SynchConsoleOutput::PutChar(char ch)
     lock->Release();
 }
 
+void
+SynchConsoleOutput::PutString(char *str)
+{
+    lock->Acquire();
+    consoleOutput->PutString(str);
+    waitFor->P();
+    lock->Release();
+}
+
 //----------------------------------------------------------------------
 // SynchConsoleOutput::CallBack
 //      Interrupt handler called when it's safe to send the next 

code/userprog/synchconsole.h

@@ -41,6 +41,7 @@ class SynchConsoleOutput : public CallBackObj {
     ~SynchConsoleOutput();
 
     void PutChar(char ch);	// Write a character, waiting if necessary
+    void PutString(char *ch);
    
   private:
     ConsoleOutput *consoleOutput;// the hardware display

code/userprog/syscall.h

@@ -34,6 +34,9 @@
 #define SC_ExecV        13
 #define SC_ThreadExit   14
 #define SC_ThreadJoin   15
+
+#define SC_PrintInt     16
+
 #define SC_Add		      42
 #define SC_MSG	        100
 
@@ -177,6 +180,8 @@ int ThreadJoin(ThreadId id);
  */
 void ThreadExit(int ExitCode);
 
+void PrintInt(int number);
+
 #endif /* IN_ASM */
 
 #endif /* SYSCALL_H */

docker-compose.yaml

@@ -0,0 +1,7 @@
+---
+services:
+  test:
+    build: .
+    user: '60139:60139'
+    volumes:
+      - './:/work'