From: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
Date: Fri, 28 Aug 2015 11:14:15 +0000 (+0300)
Subject: [FIX] preload library
X-Git-Tag: submit/tizen_2.4/20150912.103527~12
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bf2fb6b4630e93faccdb108026080ee9441fa363;p=kernel%2Fswap-modules.git

[FIX] preload library

when libdl will be mapped

Change-Id: I2156e3ba5b64e0ad4761aca95616f093d9815ef2
Signed-off-by: Vyacheslav Cherkashin <v.cherkashin@samsung.com>
---

diff --git a/preload/preload_pd.c b/preload/preload_pd.c
index ec7a7ec..fcc2e6b 100644
--- a/preload/preload_pd.c
+++ b/preload/preload_pd.c
@@ -310,6 +310,41 @@ out:
 	return page;
 }
 
+static struct vm_area_struct *find_vma_by_dentry(struct mm_struct *mm,
+						 struct dentry *dentry)
+{
+	struct vm_area_struct *vma;
+
+	for (vma = mm->mmap; vma; vma = vma->vm_next)
+		if (check_vma(vma, dentry))
+			return vma;
+
+        return NULL;
+}
+
+static void set_already_mapp(struct process_data *pd, struct mm_struct *mm)
+{
+	struct vm_area_struct *vma;
+	struct dentry *ld = preload_debugfs_get_loader_dentry();
+	struct dentry *handlers = handlers_info->dentry;
+
+	down_read(&mm->mmap_sem);
+	if (ld) {
+		vma = find_vma_by_dentry(mm, ld);
+		if (vma)
+			__set_loader_base(pd, vma->vm_start);
+	}
+
+	if (handlers) {
+		vma = find_vma_by_dentry(mm, handlers);
+		if (vma) {
+			__set_handlers_base(pd, vma->vm_start);
+			__set_state(pd, LOADED);
+		}
+	}
+	up_read(&mm->mmap_sem);
+}
+
 static struct process_data *do_create_pd(struct task_struct *task)
 {
 	struct process_data *pd;
@@ -334,6 +369,7 @@ static struct process_data *do_create_pd(struct task_struct *task)
 
 	__set_data_page(pd, page);
 	__set_attempts(pd, PRELOAD_MAX_ATTEMPTS);
+	set_already_mapp(pd, task->mm);
 
 	return pd;