增加命令行窗口（2）

25_day/bootpack.h

@@ -212,6 +212,8 @@ struct TASK {
 	int level, priority; /* 优先级 */
 	struct FIFO32 fifo;
 	struct TSS32 tss;
+	struct CONSOLE *cons;
+	int ds_base;
 };
 struct TASKLEVEL {
 	int running; /*正在运行的任务数量*/

25_day/console.c

@@ -16,7 +16,7 @@ void console_task(struct SHEET *sheet, unsigned int memtotal)
 	cons.cur_x = 8;
 	cons.cur_y = 28;
 	cons.cur_c = -1;
-	*((int *) 0x0fec) = (int) &cons;
+	task->cons = &cons;
 
 	fifo32_init(&task->fifo, 128, fifobuf, task);
 	timer = timer_alloc();
@@ -293,7 +293,7 @@ int cmd_app(struct CONSOLE *cons, int *fat, char *cmdline)
 			datsiz = *((int *) (p + 0x0010));
 			dathrb = *((int *) (p + 0x0014));
 			q = (char *) memman_alloc_4k(memman, segsiz);
-			*((int *) 0xfe8) = (int) q;
+			task->ds_base = (int) q;
 			set_segmdesc(gdt + 1003, finfo->size - 1, (int) p, AR_CODE32_ER + 0x60);
 			set_segmdesc(gdt + 1004, segsiz - 1,      (int) q, AR_DATA32_RW + 0x60);
 			for (i = 0; i < datsiz; i++) {
@@ -323,9 +323,9 @@ int cmd_app(struct CONSOLE *cons, int *fat, char *cmdline)
 
 int *hrb_api(int edi, int esi, int ebp, int esp, int ebx, int edx, int ecx, int eax)
 {
-	int ds_base = *((int *) 0xfe8);
 	struct TASK *task = task_now();
-	struct CONSOLE *cons = (struct CONSOLE *) *((int *) 0x0fec);
+	int ds_base = task->ds_base;
+	struct CONSOLE *cons = task->cons;
 	struct SHTCTL *shtctl = (struct SHTCTL *) *((int *) 0x0fe4);
 	struct SHEET *sht;
 	int *reg = &eax + 1; /* eax后面的地址*/
@@ -435,8 +435,8 @@ int *hrb_api(int edi, int esi, int ebp, int esp, int ebx, int edx, int ecx, int
 
 int *inthandler0c(int *esp)
 {
-	struct CONSOLE *cons = (struct CONSOLE *) *((int *) 0x0fec);
 	struct TASK *task = task_now();
+	struct CONSOLE *cons = task->cons;
 	char s[30];
 	cons_putstr0(cons, "\nINT 0C :\n Stack Exception.\n");
 	sprintf(s, "EIP = %08X\n", esp[11]);
@@ -446,8 +446,8 @@ int *inthandler0c(int *esp)
 
 int *inthandler0d(int *esp)
 {
-	struct CONSOLE *cons = (struct CONSOLE *) *((int *) 0x0fec);
 	struct TASK *task = task_now();
+	struct CONSOLE *cons = task->cons;
 	char s[30];
 	cons_putstr0(cons, "\nINT 0D :\n General Protected Exception.\n");
 	sprintf(s, "EIP = %08X\n", esp[11]);