add: pointers, & and * keywords

stack is now long long :sadge:

README.md

@@ -35,4 +35,5 @@ Then link the library to your program, see [this example](tests/lib_use.c).<br>
 # Code examples
 - [keylogger](examples/keylogger.pasm)
 - [polynomial calculator](examples/poly.pasm)
+- [pointers usage example](examples/ptr.pasm)
 - [functions test](examples/test.pasm)

docs/documentation.md

@@ -92,7 +92,8 @@ The syntax is very close to x86 Intel Assembly. Here is a list of the operands a
 
 All the `jmp`-related operands (`je`, `jna`, ...) can have a number as argument, this way the program will jump to `x` lines (ex: `jmp 3` will jump 3 lines down).<br>
 All the operands are case-sensitive, meaning that `ADD` will be an invalid operand.<br>
-Please note that additional operands will be added in the future.
+Please note that additional operands will be added in the future.<br>
+You can use the `&` and the `*` keywords just like in C to get the address and/or dereference and address. Example : `mov a1, &eax`
 
 ### Calling APIs
 APIs can be added in the [api.c](https://github.com/ALittlePatate/pasm/blob/main/src/api.c) and [api.h](https://github.com/ALittlePatate/pasm/blob/main/src/api.h) files.

examples/ptr.pasm

@@ -0,0 +1,7 @@
+;; pointers usage example
+
+main:
+mov eax, 5
+mov a1, &eax	; move the address of eax in a1
+mov a1, *a1		; dereference a1 in a1
+end

src/debug.c

@@ -6,23 +6,23 @@
 
 void show_registers() {
     printf("--Registers--\n");
-    printf("a1: %-3d | ", state->registers->a1);
-    printf("a2: %-3d | ", state->registers->a2);
-    printf("a3: %-3d\n", state->registers->a3);
-    printf("a4: %-3d | ", state->registers->a4);
-    printf("a5: %-3d | ", state->registers->a5);
-    printf("a6: %-3d\n", state->registers->a6);
-    printf("a7: %-3d | ", state->registers->a7);
-    printf("a8: %-3d | ", state->registers->a8);
-    printf("a9: %-3d\n", state->registers->a9);
-    printf("eax: %-3d\n\n", state->registers->eax);
+    printf("a1: %-3lld | ", state->registers->a1);
+    printf("a2: %-3lld | ", state->registers->a2);
+    printf("a3: %-3lld\n", state->registers->a3);
+    printf("a4: %-3lld | ", state->registers->a4);
+    printf("a5: %-3lld | ", state->registers->a5);
+    printf("a6: %-3lld\n", state->registers->a6);
+    printf("a7: %-3lld | ", state->registers->a7);
+    printf("a8: %-3lld | ", state->registers->a8);
+    printf("a9: %-3lld\n", state->registers->a9);
+    printf("eax: %-3lld\n\n", state->registers->eax);
 }
 
 void show_stack() {
     printf("--STACK--\n");
     printf("Elements: %d\n\n", state->STACK_IDX);
     for (int i = 0; i < state->STACK_IDX; i++)
-	printf("[%d]: %d\n", i, state->STACK[state->STACK_IDX]);
+	printf("[%d]: %lld\n", i, state->STACK[state->STACK_IDX]);
     printf("\n");
 }
 

src/instructions.c

@@ -6,8 +6,10 @@
 #include <stdlib.h>
 
 bool is_reg(char* arg) {
+    if (arg[0] == '&' || arg[0] == '*')
+        ++arg;
     return (strcmp(arg, "eax") == 0) || (((arg[0] == 'a' &&
-    ('0' <= arg[1] && arg[1] <= '9'))) && strlen(arg) == 2);
+    ('1' <= arg[1] && arg[1] <= '9'))) && strlen(arg) == 2);
 }
 
 bool is_num(char* arg) {
@@ -33,7 +35,9 @@ bool check_args(s_arguments *args, int num_in_first, int num_args) {
     return true;
 }
 
-int* get_reg(char* reg_char) {
+long long* get_reg(char* reg_char) {
+    if (reg_char[0] == '&' || reg_char[0] == '*')
+        ++reg_char;
     switch (reg_char[1]) {
 	case '1' :
 	    return &state->registers->a1;
@@ -60,12 +64,20 @@ int* get_reg(char* reg_char) {
     }
 }
 
-int get_value(char* arg) {
-    int ret = 0;
+long long get_value(char* arg) {
+    long long ret = 0;
 
     if (is_reg(arg)) {
+        if (arg[0] == '&') {
+			ret = get_reg(arg);
+        }
+        else if (arg[0] == '*') {
+            ret = *(long long *)(*get_reg(arg));
+        }
+        else {
             ret = *get_reg(arg);
         }
+    }
     else {
 	ret = atoi(arg);
     }
@@ -90,8 +102,8 @@ void cmp() {
 	return;
     }
 
-    int a1_ = get_value(state->args->arg1);
-    int a2_ = get_value(state->args->arg2);
+    long long a1_ = get_value(state->args->arg1);
+    long long a2_ = get_value(state->args->arg2);
 
     if (a1_ == a2_) state->last_cmp_code = CMP_EQUAL;
     else if (a1_ > a2_) state->last_cmp_code = CMP_ABOVE;
@@ -196,7 +208,7 @@ void _sqrt() {
 	return;
     }
 
-    *get_reg(state->args->arg1) = (int)sqrt(get_value(state->args->arg1));
+    *get_reg(state->args->arg1) = (long long)sqrt(get_value(state->args->arg1));
 }
 
 void neg() {
@@ -247,7 +259,7 @@ void push() {
 	return;
     }
     
-    int value = get_value(state->args->arg1);
+    long long value = get_value(state->args->arg1);
     if (value == 0 && !is_reg(state->args->arg1)) {
 	if (state->args->arg1[0] == '\\') {
 	    switch (state->args->arg1[1]) {

src/instructions.h

@@ -10,8 +10,8 @@ typedef struct command_s {
 
 bool is_reg(char* arg);
 bool check_args(s_arguments *args, int num_in_first, int num_args);
-int* get_reg(char* arg);
-int get_value(char* arg);
+long long* get_reg(char* arg);
+long long* get_reg(char* reg_char);
 
 void add();
 void sub();

src/interpreter_states.c

@@ -44,7 +44,7 @@ int init_state() {
     }
     memset(state->labels_values, 0, sizeof(int) * MAX_LABELS);
     memset(state->RET_STACK, -1, sizeof(int) * STACK_SIZE);
-    memset(state->STACK, 0, sizeof(int) * STACK_SIZE);
+    memset(state->STACK, 0, sizeof(long long) * STACK_SIZE);
     state->RET_STACK_IDX = -1;
     state->STACK_IDX = -1;
     state->last_stack_code = STACK_OK;

src/interpreter_states.h

@@ -33,7 +33,7 @@ typedef struct t_arguments {
 } s_arguments;
 
 typedef struct t_registers {
-    int a1, a2, a3, a4, a5, a6, a7, a8, a9, eax;
+    long long a1, a2, a3, a4, a5, a6, a7, a8, a9, eax;
 } s_registers;
 
 typedef struct t_state {
@@ -47,7 +47,7 @@ typedef struct t_state {
     int RET_STACK[STACK_SIZE];
     int RET_STACK_IDX;
     int STACK_IDX;
-    int STACK[STACK_SIZE];
+    long long STACK[STACK_SIZE];
     int last_jmp_code;
     stack_codes last_stack_code;
     cmp_return_codes last_cmp_code;

src/pasm.c

@@ -23,7 +23,7 @@ int dprintf(int stream, const char * format, ...) {
   int wrote = vsprintf(buf, format, args);
   struct sockaddr name = {0};
   int len = 0;
-  if (getsockname(stream, &name, &len) == WSAENOTSOCK) {
+  if (getsockname(stream, &name, &len) != 0) {
 	  _write(stream, buf, sizeof(buf));
   }
   else {