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Message-ID: <423A2D88.8090408@gmail.com>
Date: Fri, 18 Mar 2005 01:23:20 +0000
From: Luca Falavigna <dktrkranz@gmail.com>
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To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: EIP and VMA
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Hi,
I am working on this piece of code (simplified):

void ip_vma(struct task_struct *task, struct pt_regs *regs)
{
	struct mm_struct *mm;
	struct vm_area_struct *vma;

	if(task) {
		mm = get_task_mm(task);
		if(mm) {
			vma = find_vma(mm, regs->eip);
 			if(vma) {
				/* Some code */
			}
			else
				printk("WARNING: No VMA\n");
			mmput(mm);
		}
	}
}

I would like to get instruction pointer's VMA of a task. In order to do so, I
use find_vma function, using regs->eip as instruction pointer value.
Unfortunately I always get "WARNING: No VMA" message because find_vma isn't able
to find the right VMA regs->eip address belongs to.
Is regs->eip the right place where istruction pointer is located or I should
find that value elsewhere?

Thank you,



				Luca