Exemplos de return_from_intr em C++ (Cpp)

Exemplo n.º 1

Arquivo: idt.c Projeto: gdarcy/scaraOS

unsigned exc_handler(uint32_t exc_num, volatile struct intr_ctx ctx)
{
	static const char * const tname[] = {
		"UNKNOWN",
		"fault",
		"trap",
		"abort condition",
	};

	if ( exc[exc_num].handler ) {
		(*exc[exc_num].handler)((struct intr_ctx *)&ctx);
		return return_from_intr(&ctx);
	}

	if ( (ctx.cs & __CPL3) == __CPL3 ) {
		_sys_exit(~0);
	}

	cli();
	printk("%s: %s @ 0x%.8lx",
		tname[exc[exc_num].type], exc[exc_num].name, ctx.eip);
	if ( exc[exc_num].err_code ) {
		if ( ctx.err_code & 0x1 )
			printk(" EXT");
		switch ( ctx.err_code & 0x6 ) {
		case 0:
			printk(" GDT");
			break;
		case 2:
			printk(" IDT");
			break;
		case 4:
			printk(" LDT");
			break;
		}
		printk(" selector=0x%.lx", ctx.err_code & 0xfff8);
	}
	printk("\n");
	ctx_dump((struct intr_ctx *)&ctx);
	idle_task_func();
}

Exemplo n.º 2

Arquivo: task.c Projeto: Hunter777/scaraOS

	ntss->sp0 = (vaddr_t)((uint8_t *)new + PAGE_SIZE);
	ntss->ss0 = __KERNEL_DS;
	ntss->flags = ptss->flags | (1 << 9);

	ntss->ss = ntss->ds = ntss->es = __KERNEL_DS;
	ntss->cs = __KERNEL_CS;

	regs = parent->t.intr_ctx;

	stack_top = (uint8_t *)new + PAGE_SIZE;
	memcpy(stack_top - sizeof(*regs), regs, sizeof(*regs));
	regs = (struct intr_ctx *)(stack_top - sizeof(*regs));
	regs->eax = 0;

	ntss->esp = (vaddr_t)regs;
	ntss->eax = return_from_intr(regs);
	ntss->eip = (vaddr_t)ret_from_fork_in_child;
	if ( ip != MAP_INVALID ) {
		regs->eip = ip;
	}
	if ( sp != MAP_INVALID ) {
		regs->esp3 = sp;
	}
}

void task_init_exec(struct task *tsk, vaddr_t ip, vaddr_t sp)
{
	unsigned short tr, scratch_tr;
	struct ia32_tss *tss;
	static struct ia32_tss scratch;