From 5ae0711de4b899b99685d7703b7f2fe9e6848341 Mon Sep 17 00:00:00 2001
From: Yifan Lu
Date: Sun, 9 Oct 2016 13:28:59 -0700
Subject: Getting the mirror address from Vita exec slab

---
 lib/vita/slab.c | 13 +++++++++++++
 lib/vita/slab.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/lib/vita/slab.c b/lib/vita/slab.c
index 91742a6..0884e5f 100755
--- a/lib/vita/slab.c
+++ b/lib/vita/slab.c
@@ -298,6 +298,19 @@ void slab_free(struct slab_chain *const sch, const void *const addr)
     }
 }
 
+uintptr_t slab_getmirror(struct slab_chain *const sch, const void *const addr)
+{
+    assert(sch != NULL);
+    assert(slab_is_valid(sch));
+    assert(addr != NULL);
+
+    struct slab_header *const slab = (void *)
+        ((uintptr_t) addr & sch->alignment_mask);
+
+
+    return slab->exe_data + (ptrdiff_t)((char *) addr - (char *) slab);
+}
+
 void slab_traverse(const struct slab_chain *const sch, void (*fn)(const void *))
 {
     assert(sch != NULL);
diff --git a/lib/vita/slab.h b/lib/vita/slab.h
index c8c5d9b..153c008 100755
--- a/lib/vita/slab.h
+++ b/lib/vita/slab.h
@@ -35,5 +35,6 @@ struct slab_chain {
 void slab_init(struct slab_chain *, size_t, SceUID);
 void *slab_alloc(struct slab_chain *, uintptr_t *);
 void slab_free(struct slab_chain *, const void *);
+uintptr_t slab_getmirror(struct slab_chain *, const void *);
 void slab_traverse(const struct slab_chain *, void (*)(const void *));
 void slab_destroy(const struct slab_chain *);
-- 
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