From d0460122f4a6d04b22455cccac9eadf8078d332f Mon Sep 17 00:00:00 2001
From: DrChat <arkolbed@gmail.com>
Date: Sat, 10 Feb 2018 21:58:44 -0600
Subject: [PATCH] [Core] BaseHeap::QueryBaseAndSize

---
 src/xenia/memory.cc | 14 ++++++++++++++
 src/xenia/memory.h  |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/src/xenia/memory.cc b/src/xenia/memory.cc
index 9636b38e7..2c30041eb 100644
--- a/src/xenia/memory.cc
+++ b/src/xenia/memory.cc
@@ -1147,6 +1147,20 @@ bool BaseHeap::QuerySize(uint32_t address, uint32_t* out_size) {
   return true;
 }
 
+bool BaseHeap::QueryBaseAndSize(uint32_t* in_out_address, uint32_t* out_size) {
+  uint32_t page_number = (*in_out_address - heap_base_) / page_size_;
+  if (page_number > page_table_.size()) {
+    XELOGE("BaseHeap::QuerySize base page out of range");
+    *out_size = 0;
+    return false;
+  }
+  auto global_lock = global_critical_region_.Acquire();
+  auto page_entry = page_table_[page_number];
+  *in_out_address = (page_entry.base_address * page_size_);
+  *out_size = (page_entry.region_page_count * page_size_);
+  return true;
+}
+
 bool BaseHeap::QueryProtect(uint32_t address, uint32_t* out_protect) {
   uint32_t page_number = (address - heap_base_) / page_size_;
   if (page_number > page_table_.size()) {
diff --git a/src/xenia/memory.h b/src/xenia/memory.h
index 64f8c57e9..4309ded05 100644
--- a/src/xenia/memory.h
+++ b/src/xenia/memory.h
@@ -144,6 +144,9 @@ class BaseHeap {
   // Queries the size of the region containing the given address.
   bool QuerySize(uint32_t address, uint32_t* out_size);
 
+  // Queries the base and size of a region containing the given address.
+  bool QueryBaseAndSize(uint32_t* in_out_address, uint32_t* out_size);
+
   // Queries the current protection mode of the region containing the given
   // address.
   bool QueryProtect(uint32_t address, uint32_t* out_protect);