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Add Syscall: Exit, PutChar, GetCar, PutString, GetString

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This commit is contained in:
Yorick Barbanneau 2021-10-11 22:41:17 +02:00
parent 6f405265a5
commit 80fc250109
15 changed files with 359 additions and 17 deletions
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2
code/Makefile.common
View file

@ -31,7 +31,7 @@ THREAD_O := main.o list.o scheduler.o synch.o synchlist.o \
stats.o sysdep.o timer.o
USERPROG_O := addrspace.o bitmap.o exception.o progtest.o console.o \
machine.o mipssim.o translate.o
consoledriver.o machine.o mipssim.o translate.o
VM_O :=

1
code/Makefile.dep
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@ -40,6 +40,7 @@ HOST += -DLINUX
CFLAGS += -fsanitize=undefined
LDFLAGS += -fsanitize=undefined
# décommenté TD1 - partie V
#CFLAGS += -fsanitize=address
#LDFLAGS += -fsanitize=address -lpthread
endif

13
code/test/getstring.c Normal file
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@ -0,0 +1,13 @@
#include "syscall.h"
int main()
{
//char s;
//s = GetChar();
//PutChar(s);
char t[100];
GetString(t, 100);
PutString(t);
PutChar('\n');
PutString("Ceci est un test de grande ampleur");
}

17
code/test/putchar.c Normal file
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@ -0,0 +1,17 @@
#include "syscall.h"
void print(char c, int n)
{
int i;
//#if 0
for (i = 0; i < n; i++) {
PutChar(c + i);
}
PutChar('\n');
//#endif
}
int
main()
{
print('a',4);
Halt();
}

15
code/test/putstring.c Normal file
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@ -0,0 +1,15 @@
#include "syscall.h"
int main()
{
// PutString("Te\n");
// PutString("Tes\n");
// PutString("Tes t\n");
// // les deux derniers ne fonctionnent pas car ila dépassent la taille du
// // buffer: MAX_STRING_SIZE
// //
// // Maitenant que j'ai fais une boucle dans PutString, tout fonctionne bien
PutString("BonjourTout\n");
PutString("Bonjour tout le monde\n");
Exit(4);
}

37
code/test/start.S
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@ -146,6 +146,43 @@ Yield:
j $31
.end Yield
#ifdef CHANGED
.globl PutChar
.ent PutChar
PutChar:
addiu $2,$0,SC_PutChar
syscall
j $31
.end PutChar
.globl PutString
.ent PutString
PutString:
addiu $2,$0,SC_PutString
syscall
j $31
.end PutString
.globl GetChar
.ent GetChar
GetChar:
addiu $2,$0,SC_GetChar
syscall
j $31
.end PutChar
.globl GetString
.ent GetString
GetString:
addiu $2,$0,SC_GetString
syscall
j $31
.end GetString
#endif
/* dummy function to keep gcc happy */
.globl __main
.ent __main

15
code/threads/main.cc
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@ -18,7 +18,6 @@
#include "utility.h"
#include "system.h"
#ifdef USER_PROGRAM
#include "progtest.h"
#endif
@ -118,6 +117,7 @@ main (int argc, char **argv)
if (!strcmp (*argv, "-x"))
{ // run a user program
ASSERT (argc > 1);
consoledriver = new ConsoleDriver(NULL,NULL);
StartProcess (*(argv + 1));
argCount = 2;
}
@ -132,6 +132,19 @@ main (int argc, char **argv)
argCount = 3;
}
}
#ifdef CHANGED
else if (!strcmp (*argv, "-sc"))
{ // test the consoledriver
if (argc == 1)
ConsoleDriverTest (NULL, NULL);
else
{
ASSERT (argc > 2);
ConsoleDriverTest (*(argv + 1), *(argv + 2));
argCount = 3;
}
}
#endif // CHANGE
#endif // USER_PROGRAM
#ifdef FILESYS
if (!strcmp (*argv, "-cp"))

13
code/threads/system.cc
View file

@ -33,7 +33,12 @@ SynchDisk *synchDisk;
#ifdef USER_PROGRAM // requires either FILESYS or FILESYS_STUB
Machine *machine; // user program memory and registers
#endif
#ifdef CHANGED // Define our consoledriver Object
ConsoleDriver *consoledriver;
#endif // CHANGED
#endif // USER_PROGRAM
#ifdef NETWORK
PostOffice *postOffice;
@ -230,6 +235,12 @@ Cleanup ()
delete machine;
machine = NULL;
}
#ifdef CHANGED
if (consoledriver) {
delete consoledriver;
consoledriver = NULL;
}
#endif
#endif
#ifdef FILESYS_NEEDED

7
code/threads/system.h
View file

@ -32,6 +32,13 @@ extern Timer *timer; // the hardware alarm clock
#ifdef USER_PROGRAM
#include "machine.h"
extern Machine *machine; // user program memory and registers
#ifdef CHANGED
#define MAX_STRING_SIZE 8
#include "consoledriver.h"
extern ConsoleDriver *consoledriver; // add console driver
#endif
#endif
#ifdef FILESYS_NEEDED // FILESYS or FILESYS_STUB

66
code/userprog/consoledriver.cc Normal file
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@ -0,0 +1,66 @@
#ifdef CHANGED
#include "copyright.h"
#include "system.h"
#include "consoledriver.h"
#include "synch.h"
#define STRINGBUFFER 8
static Semaphore *readAvail;
static Semaphore *writeDone;
static void ReadAvailHandler(void *arg) { (void) arg; readAvail->V(); }
static void WriteDoneHandler(void *arg) { (void) arg; writeDone->V(); }
ConsoleDriver::ConsoleDriver(const char *in, const char *out)
{
readAvail = new Semaphore("read avail", 0);
writeDone = new Semaphore("write done", 0);
console = new Console (in, out, ReadAvailHandler, WriteDoneHandler, NULL);
}
ConsoleDriver::~ConsoleDriver()
{
delete console;
delete writeDone;
delete readAvail;
}
void ConsoleDriver::PutChar( int ch)
{
console->TX(ch);
writeDone->P();
}
int ConsoleDriver::GetChar()
{
readAvail->P();
int ch = console->RX();
return ch;
}
void ConsoleDriver::PutString(const char s[MAX_STRING_SIZE])
{
int i;
for (i = 0; i < MAX_STRING_SIZE; i++){
if (*(s+i) =='\0'){
return;
}
PutChar(*(s+i));
}
}
void ConsoleDriver::GetString(char * s, int n)
{
int i;
for ( i = 0; i < n - 1; i++){
char c = GetChar();
if ( c == '\0' || c == '\n' || c == EOF) {
break;
}
*(s+i) = c;
}
*(s+i) = '\0';
}
#endif // CHANGED

25
code/userprog/consoledriver.h Normal file
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@ -0,0 +1,25 @@
#ifdef CHANGED
#ifndef CONSOLEDRIVER_H
#define CONSOLEDRIVER_H
#include "copyright.h"
#include "utility.h"
#include "console.h"
class ConsoleDriver:dontcopythis {
public:
// initialize the hardware console device
ConsoleDriver(const char *readFile, const char *writeFile);
~ConsoleDriver(); // clean up
void PutChar(int ch); // Behaves like putchar(3S)
int GetChar(); // Behaves like getchar(3S)
void PutString(const char *s); // Behaves like fputs(3S)
void GetString(char *s, int n); // Behaves like fgets(3S)
private:
Console *console;
};
#endif // CONSOLEDRIVER_H
#endif // CHANGED

92
code/userprog/exception.cc
View file

@ -63,6 +63,37 @@ UpdatePC ()
// "which" is the kind of exception. The list of possible exceptions
// are in machine.h.
//----------------------------------------------------------------------
int copyStringFromMachine(int from, char *to, unsigned size)
{
unsigned i = 0;
int res;
// Need to read size-1 to put final /0 if needed
while((i<size-1) && (machine->ReadMem(from+i,1,&res))){
*(to+i) = (char)res;
if ((char)res == '\0'){
return i;
}
i++;
}
*(to+i)='\0';
return size;
}
int copyStringToMachine(int to, char* from, unsigned size)
{
unsigned i;
for (i=0; i < size - 1; i++) {
if (from[i] == '\0') {
break;
}
machine->WriteMem(to+i,1,(int)from[i]);
}
// Write the last /0
machine->WriteMem(to+i,1,'\0');
return i;
}
void
ExceptionHandler (ExceptionType which)
@ -82,6 +113,67 @@ ExceptionHandler (ExceptionType which)
interrupt->Powerdown ();
break;
}
#ifdef CHANGED
case SC_Exit:
{
int ret = machine->ReadRegister(4);
printf("Exit code %d\n", ret);
interrupt->Powerdown();
break;
}
case SC_PutChar:
{
DEBUG ('s', "PutChar.\n");
consoledriver->PutChar((char)machine->ReadRegister(4));
break;
}
case SC_PutString:
{
DEBUG ('s', "PutString.\n");
int readsize;
int addr_start = machine->ReadRegister(4);
do {
char* read = new char[MAX_STRING_SIZE];
readsize = copyStringFromMachine( addr_start, read, MAX_STRING_SIZE);
consoledriver->PutString(read);
// beware, the last element of our buffer was added by
// copyStringFromMachine(), we need to remove one memory case
// or the first char of our next read will be
// forgotten
addr_start += readsize - 1;
delete [] read;
} while(readsize == MAX_STRING_SIZE);
break;
}
case SC_GetChar:
{
DEBUG ('s', "GetChar.\n");
// Get the char input an write it to the register n.2
int c = consoledriver->GetChar();
machine->WriteRegister((2), c);
break;
}
case SC_GetString:
{
DEBUG ('s', "GetString.\n");
int writesize = 0;
int addr = machine->ReadRegister(4);
int size = machine->ReadRegister(5);
DEBUG ('s', "size:%d\n", size);
do {
char* write = new char[MAX_STRING_SIZE];
consoledriver->GetString(write, MAX_STRING_SIZE);
printf("write:%s:\n", write);
writesize = copyStringToMachine(addr, write, MAX_STRING_SIZE);
addr += writesize;
printf("Writed:%d\n", writesize);
delete [] write;
} while( writesize == MAX_STRING_SIZE - 1 );
break;
}
#endif
default:
{
printf("Unimplemented system call %d\n", type);

33
code/userprog/progtest.cc
View file

@ -10,6 +10,7 @@
#include "copyright.h"
#include "system.h"
#include "consoledriver.h"
#include "console.h"
#include "addrspace.h"
#include "synch.h"
@ -84,7 +85,7 @@ void
ConsoleTest (const char *in, const char *out)
{
char ch;
printf("test console\n<");
readAvail = new Semaphore ("read avail", 0);
writeDone = new Semaphore ("write done", 0);
console = new Console (in, out, ReadAvailHandler, WriteDoneHandler, NULL);
@ -93,14 +94,44 @@ ConsoleTest (const char *in, const char *out)
{
readAvail->P (); // wait for character to arrive
ch = console->RX ();
#ifdef CHANGED
// My modifications...
// Check input before display it...
if (ch == 'q' || ch == -1 ) {
printf ("au revoir!\n");
break; // if q, quit
}
console->TX ('<');
writeDone->P ();
console->TX (ch); // echo it!
writeDone->P (); // wait for write to finish
console->TX ('>');
writeDone->P ();
#else
console->TX (ch); // echo it!
writeDone->P (); // wait for write to finish
if (ch == 'q') {
printf ("Nothing more, bye!\n");
break; // if q, quit
}
#endif
}
delete console;
delete readAvail;
delete writeDone;
}
#ifdef CHANGED
void
ConsoleDriverTest (const char *in, const char *out)
{
printf("test consoledriver\n");
char ch;
ConsoleDriver *test_consoledriver = new ConsoleDriver(in, out);
while ((ch = test_consoledriver->GetChar()) != EOF)
test_consoledriver->PutChar(ch);
fprintf(stderr, "EOF detected in ConsoleDriver!\n");
delete test_consoledriver;
}
#endif //CHANGED

4
code/userprog/progtest.h
View file

@ -14,5 +14,7 @@
extern void StartProcess (char *filename);
extern void ConsoleTest (const char *in, const char *out);
#ifdef CHANGED
extern void ConsoleDriverTest (const char *in, const char *out);
#endif //CHANGED
#endif // PROGTEST_H

36
code/userprog/syscall.h
View file

@ -20,18 +20,23 @@
/* system call codes -- used by the stubs to tell the kernel which system call
* is being asked for
*/
#define SC_Halt 0
#define SC_Exit 1
#define SC_Exec 2
#define SC_Join 3
#define SC_Create 4
#define SC_Open 5
#define SC_Read 6
#define SC_Write 7
#define SC_Close 8
#define SC_Fork 9
#define SC_Yield 10
#define SC_Halt 0
#define SC_Exit 1
#define SC_Exec 2
#define SC_Join 3
#define SC_Create 4
#define SC_Open 5
#define SC_Read 6
#define SC_Write 7
#define SC_Close 8
#define SC_Fork 9
#define SC_Yield 10
#ifdef CHANGED
#define SC_PutChar 11 // My first SysCall :')
#define SC_PutString 12
#define SC_GetChar 13
#define SC_GetString 14
#endif
#ifdef IN_USER_MODE
// LB: This part is read only on compiling the test/*.c files.
@ -130,6 +135,13 @@ void Fork (void (*func) ());
*/
void Yield ();
#ifdef CHANGED
void PutChar (char c);
void PutString (char * s);
void GetChar(char c);
void GetString(char * s, int n );
#endif // CHANGED
#endif // IN_USER_MODE
#endif /* SYSCALL_H */