From 1f5e5c1fad5f5507eb99472e7b80dfa3c3002996 Mon Sep 17 00:00:00 2001
From: momo5502 <mauriceheumann@gmail.com>
Date: Sun, 22 Sep 2024 11:21:49 +0200
Subject: [PATCH] More syscalls

---
 src/emulator/memory_manager.cpp   |  4 +++-
 src/emulator/memory_manager.hpp   |  1 +
 src/windows_emulator/syscalls.cpp | 34 +++++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/emulator/memory_manager.cpp b/src/emulator/memory_manager.cpp
index 539f4c93..610d3863 100644
--- a/src/emulator/memory_manager.cpp
+++ b/src/emulator/memory_manager.cpp
@@ -394,6 +394,7 @@ region_info memory_manager::get_region_info(const uint64_t address)
 	result.length = MAX_ALLOCATION_ADDRESS - result.start;
 	result.pemissions = memory_permission::none;
 	result.allocation_base = {};
+	result.allocation_length = result.length;
 	result.is_committed = false;
 	result.is_reserved = false;
 
@@ -424,8 +425,9 @@ region_info memory_manager::get_region_info(const uint64_t address)
 
 	result.is_reserved = true;
 	result.allocation_base = entry->first;
+	result.allocation_length = reserved_region.length;
 	result.start = result.allocation_base;
-	result.length = reserved_region.length;
+	result.length = result.allocation_length;
 
 	if (committed_regions.empty())
 	{
diff --git a/src/emulator/memory_manager.hpp b/src/emulator/memory_manager.hpp
index f24253b4..54e33dda 100644
--- a/src/emulator/memory_manager.hpp
+++ b/src/emulator/memory_manager.hpp
@@ -8,6 +8,7 @@
 struct region_info : basic_memory_region
 {
 	uint64_t allocation_base{};
+	size_t allocation_length{};
 	bool is_reserved{};
 	bool is_committed{};
 };
diff --git a/src/windows_emulator/syscalls.cpp b/src/windows_emulator/syscalls.cpp
index bdaf28d3..09131ba4 100644
--- a/src/windows_emulator/syscalls.cpp
+++ b/src/windows_emulator/syscalls.cpp
@@ -644,6 +644,40 @@ namespace
 			return STATUS_SUCCESS;
 		}
 
+		if (info_class == MemoryRegionInformation)
+		{
+			if (return_length)
+			{
+				return_length.write(sizeof(MEMORY_REGION_INFORMATION));
+			}
+
+			if (memory_information_length != sizeof(MEMORY_REGION_INFORMATION))
+			{
+				return STATUS_BUFFER_OVERFLOW;
+			}
+
+			const auto region_info = c.emu.get_region_info(base_address);
+			if(!region_info.is_reserved)
+			{
+				return STATUS_INVALID_ADDRESS;
+			}
+
+			const emulator_object<MEMORY_REGION_INFORMATION> info{c.emu, memory_information};
+
+			info.access([&](MEMORY_REGION_INFORMATION& image_info)
+			{
+				memset(&image_info, 0, sizeof(image_info));
+
+				image_info.AllocationBase = reinterpret_cast<void*>(region_info.allocation_base);
+				image_info.AllocationProtect = 0;
+				image_info.PartitionId = 0;
+				image_info.RegionSize = region_info.allocation_length;
+				image_info.Reserved = 0x10;
+			});
+
+			return STATUS_SUCCESS;
+		}
+
 		printf("Unsupported memory info class: %X\n", info_class);
 		c.emu.stop();
 		return STATUS_NOT_SUPPORTED;