fix: ajout de fonction de debogueuage et exception 1

include/debug.h

@@ -35,3 +35,18 @@
         return;                           \
     }
 
+
+#define DBG_EXEC        0b00
+#define DBG_WRITE       0b01
+#define DBG_CLEAR       0b10
+#define DBG_READWRITE   0b11
+
+#define DBG_ONEBYTE     0b00
+#define DBG_TWOBYTE     0b01
+#define DBG_FOURBYTE    0b11
+
+
+void setdebugreg(u8 number,u8 *address, u8 type);
+u8* getdebugreg(u8 number);
+u32 disas(u8 *a);
+u32 decode(bool at, u8 *a, bool show);

include/shell.h

@@ -21,3 +21,6 @@ int err();
 int view();
 int test(void);
 int disasm(u8* commandline);
+int bpset(u8* commandline);
+int bpclr(u8* commandline);
+int help();

lib/cpu.c

@@ -206,6 +206,71 @@ asm("   addl %[size],%%esp \n \
 /******************************************************************************/
 /* Affiche les registres CPU */
 
+void show_lightcpu(save_stack *stack)
+{
+    u32 i;
+	printf("\33[0mEAX=%Y EBX=%Y ECX=%Y EDX=%Y\r\n", stack->eax, stack->ebx, stack->ecx, stack->edx);
+	printf("ESI=%Y EDI=%Y ESP=%Y EBP=%Y\r\n", stack->esi, stack->edi, stack->esp, stack->ebp);
+	printf("EIP=%Y EFL=%Y [%c%c%c%c%c%c%c%c%c]\r\n", stack->eip, stack->eflags,
+    (stack->eflags & (1 <<11)) ? 'O':'-',
+    (stack->eflags & (1 <<10)) ? 'D':'-',
+    (stack->eflags & (1 << 9)) ? 'I':'-',
+    (stack->eflags & (1 << 8)) ? 'T':'-',
+    (stack->eflags & (1 << 7)) ? 'S':'-',
+    (stack->eflags & (1 << 6)) ? 'Z':'-',
+    (stack->eflags & (1 << 4)) ? 'A':'-',
+    (stack->eflags & (1 << 2)) ? 'P':'-',
+    (stack->eflags & (1 << 0)) ? 'C':'-');
+	printf("CS =%hY DS =%hY SS =%hY ES =%hY FS =%hY GS =%hY\r\n",stack->cs,stack->ds,stack->ss,stack->es,stack->fs,stack->gs);
+    printf("CR0=%Y CR2=%Y CR3=%Y CR4=%Y\r\n\r\n\r\n",stack->cr0,stack->cr2,stack->cr3,stack->cr4);
+    
+    u8* size;
+    u8* pointer;
+    for(i=20;i<50;i++) {
+        pointer=stack->eip-i;
+        size=pointer;
+        size+=50;
+        while(pointer<size) {
+            pointer+=decode(false, pointer,false);
+            if (pointer==stack->eip) break;
+        }
+        if (pointer==stack->eip) break;
+    }
+    if (pointer==stack->eip)
+        pointer=stack->eip-i;
+    else
+         pointer=stack->eip;       
+    size=pointer;
+    size+=50;
+    while(pointer<size)
+    {
+        if (pointer==stack->eip)
+            print("\33[41m\33[1m");
+        else
+            print("\33[40m\33[0m");           
+         pointer+=disas(pointer); 
+    }
+
+	printf("\33[0m\r\n\r\n\r\nSTACK\r\n");
+    if (abs(KERNEL_STACK_ADDR-stack->esp)>0x10000)
+        printf("Pile invalide !");
+    else
+    {
+        i=0;
+	    for (u32 *pointer = stack->esp; pointer < KERNEL_STACK_ADDR; pointer ++) {
+            if (i>0 && i % 10 == 0) print("\033[10A");
+            if (i>=10)
+                print("\033[25C");            
+		    printf("+%d:%Y - %Y\r\n", i++, pointer, (u32)(*pointer));
+        }
+        for(u32 j=0;j<10-(i % 10);j++)
+            print("\033[01B");
+	}
+}
+
+/******************************************************************************/
+/* Affiche les registres CPU */
+
 void show_cpu(save_stack *stack)
 {
 	printf("EAX=%Y EBX=%Y ECX=%Y EDX=%Y\r\n", stack->eax, stack->ebx, stack->ecx, stack->edx);
@@ -250,10 +315,6 @@ void show_cpu(save_stack *stack)
             if (i>=10)
                 print("\033[25C");            
 		    printf("+%d:%Y - %Y\r\n", i++, pointer, (u32)(*pointer));
-		    if (i > 20) {
-			    print("...\r\n");
-			    break;
-		    }
         }
         for(u32 j=0;j<10-(i % 10);j++)
             print("\033[01B");

lib/interrupts.c

@@ -8,6 +8,7 @@
 #include "video.h"
 #include "gdt.h"
 #include "system.h"
+#include "debug.h"
 
 #define IDT_SIZE		256	/* nombre de descripteurs */
 
@@ -188,7 +189,13 @@ void exception1()
     dump.eip=current->eip;
     dump.cs=current->cs;
     dump.esp=(current+1);
-	cpuerror("#DB Debug exception",&dump);
+    changevc(6);
+    clearscreen();
+    show_lightcpu(&dump);
+    setdebugreg(0,0, DBG_CLEAR);
+	sti();
+    waitascii();
+    iret();
 }
 
 void exception2()

lib/shell.c

@@ -27,7 +27,10 @@ static command commands[] = {
 	{"err"      , "", &err},
 	{"test"      , "", &test},
 	{"view"      , "", &view},
-	{"disasm"      , "", &disasm}
+	{"disasm"      , "", &disasm},
+	{"bpset"      , "", &bpset},
+	{"bpclr"      , "", &bpclr},
+	{"help"      , "", &help},
 };
 
 /*******************************************************************************/
@@ -49,7 +52,7 @@ void shell()
 		strgetitem(&field, &item, ' ', 0);
 		strtolower(&item);
 		found = false;
-		for (i = 0; i < sizeof(commands); i++) {
+		for (i = 0; i < sizeof(commands)/sizeof(commands[0]); i++) {
 			if (strcmp(&item, &commands[i].name) == 0) {
 				(*commands[i].function) (&field);
 				found = true;
@@ -64,6 +67,75 @@ void shell()
 int test(void)
 {
     print("Fonction de test !\r\n");
+    return;
+}
+
+/*******************************************************************************/
+/* Renvoie les commandes disponibles */
+
+int help()
+{
+    print("Commandes disponibles :\r\n\r\n");
+    for(u32 i=0;i<sizeof(commands)/sizeof(commands[0]);i++) {
+        printf("%s \r\n",&commands[i].name);
+    }
+    return 0;
+}
+/*******************************************************************************/
+/* Met un breakpoint */
+
+int bpset(u8* commandline)
+{
+    u8 arg[] = "       \000";
+    u8* numero;
+    u8* pointer;
+    u8 type=DBG_EXEC;
+	if (strgetnbitems(commandline, ' ') < 3)
+    {
+		print("Syntaxe de la commande BPSET\r\nbpset \33[32mnumero address [type]\r\n\r\n \33[32mnumero\33[0m\33[0m\33[25D\33[10C - numero du breakpoint (0-3)\r\n \33[32madresse\33[0m\33[25D\33[10C - adresse du breakpoint\r\n \33[32mtype\33[0m\33[25D\33[10C - type de breakpoint (0-3)\r\n");
+        return;
+    }
+	strgetitem(commandline, &arg, ' ', 1);
+    numero=strtoint(&arg);
+    if (numero>3) {
+        print("numero incorrect");
+        return;
+    }
+	strgetitem(commandline, &arg, ' ', 2);
+    pointer=strtoint(&arg);
+	if (strgetnbitems(commandline, ' ') == 4)
+    {
+	    strgetitem(commandline, &arg, ' ', 3);
+        type=strtoint(&arg);
+    }
+    if (type>DBG_READWRITE)
+    {
+        print("type incorrect");
+        return;
+    }
+    setdebugreg(numero,pointer,type);
+}
+
+/*******************************************************************************/
+/* Retire un breakpoint */
+
+int bpclr(u8* commandline)
+{
+    u8 arg[] = "       \000";
+    u8* numero;
+    
+	if (strgetnbitems(commandline, ' ') < 2)
+    {
+		print("Syntaxe de la commande BPCLR\r\nbpclr \33[32mnumero\r\n\r\n \33[32mnumero\33[0m\33[0m\33[25D\33[10C - numero du breakpoint (0-3)\r\n");
+        return;
+    }
+	strgetitem(commandline, &arg, ' ', 1);
+    numero=strtoint(&arg);
+    if (numero>3) {
+        print("numero incorrect");
+        return;
+    }
+    setdebugreg(numero,0x0,DBG_CLEAR);
 }
 
 /*******************************************************************************/
@@ -81,12 +153,13 @@ int disasm(u8* commandline)
         return;
     }
 	strgetitem(commandline, &arg, ' ', 1);
-    size=pointer=strtoint(&arg);
+    pointer=strtoint(&arg);
+    size=pointer;
 	strgetitem(commandline, &arg, ' ', 2);
     size+=strtoint(&arg);
     while(pointer<size)
     {
-         pointer+=decode(pointer);
+         pointer+=disas(pointer);
     }
 }
 
@@ -188,9 +261,8 @@ int err(u8* commandline)
         break;
     case 1:
         print("Creation d'un breakpoint !\r\n");
-        asm("movl %[address],%%dr0 \n \
-         movl $0x00000003, %%eax\n \
-         movl %%eax, %%dr7"::[address] "a" (&test):);
+        setdebugreg(0,&test, DBG_EXEC);
+        test();
         break;
     case 2:
         print("NON GERE!\r\n");

lib/video.c

@@ -326,7 +326,7 @@ u32 storestr(u8* src, u8** dest, u32 len) {
     return len;
 }
 
-#define maxbuffersize 1024
+#define maxbuffersize 4096
 
 /*******************************************************************************/
 /* affiche une chaine de caractère formaté a l'ecran */