pfaure/InterpreteurRegistres
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Correctif merge

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This commit is contained in:
Paul Faure 2021-06-24 15:19:58 +02:00
parent 36996ae17f
commit bc036e3c94
1 changed files with 42 additions and 8 deletions
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50
Tables/tables.c
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@ -4,8 +4,11 @@
#define TAILLE_BUFFER_INSTRUCTIONS (1024)
#define TAILLE_MEMOIRE (32)
#define TAILLE_PILE_APPELS (16)
#define TAILLE_BANC_REGISTRES (16)
#define SECURISED (1)
/**************************************************/
/**************************************************/
@ -35,6 +38,12 @@ int mem[TAILLE_MEMOIRE];
// Pointeur de base dans la mémoire
int ebp = 0;
// Memoire du programme
int pile[TAILLE_PILE_APPELS];
// Pointeur de sommet dans la pile d'appel
int esp = 0;
// Flag Z
int Z = 0;
@ -77,6 +86,15 @@ int check_registre(int registre) {
return registre;
}
// Verifie que les limites de la mémoire d'appels ne sont pas franchies
int check_adresse_pile(int adresse) {
if (adresse >= TAILLE_PILE_APPELS || adresse < 0) {
printf("\033[31;01m ERROR : \033[00m Stack error\n");
exit(2);
}
return adresse;
}
// Verifie que eip ne depasse pas la taille du buffer
int check_eip(int eip) {
if (eip >= TAILLE_BUFFER_INSTRUCTIONS) {
@ -208,16 +226,32 @@ void execute() {
printf("%d@%d\n", registres[check_registre(programme[eip].param1)], programme[eip].param1);
} else if (programme[eip].instruction == CALL) {
mem[check_adresse(ebp + programme[eip].param2)] = ebp;
mem[check_adresse(ebp + programme[eip].param2 + 1)] = eip + 1;
ebp = ebp + programme[eip].param2 + 2;
eip = programme[eip].param1 - 1;
if (SECURISED) {
pile[check_adresse_pile(esp)] = ebp;
esp++;
pile[check_adresse_pile(esp)] = eip + 1;
esp++;
ebp = ebp + programme[eip].param2;
eip = programme[eip].param1 - 1;
} else {
mem[check_adresse(ebp + programme[eip].param2)] = ebp;
mem[check_adresse(ebp + programme[eip].param2 + 1)] = eip + 1;
ebp = ebp + programme[eip].param2 + 2;
eip = programme[eip].param1 - 1;
}
} else if (programme[eip].instruction == RET) {
int lastebp = ebp;
eip = mem[check_adresse(ebp - 1)] - 1;
ebp = mem[check_adresse(ebp - 2)];
mem[check_adresse(lastebp - 2)] = mem[check_adresse(lastebp)];
if (SECURISED) {
esp--;
eip = pile[check_adresse_pile(esp)] - 1;
esp--;
ebp = pile[check_adresse_pile(esp)];
} else {
int lastebp = ebp;
eip = mem[check_adresse(ebp - 1)] - 1;
ebp = mem[check_adresse(ebp - 2)];
mem[check_adresse(lastebp - 2)] = mem[check_adresse(lastebp)];
}
} else if (programme[eip].instruction == STOP) {
if (programme[eip].param1 == 0) {