1 files changed, 39 insertions, 0 deletions

diff --git a/src/core/loader/nso.h b/src/core/loader/nso.h
index 167c8a694..4674c3724 100644
--- a/src/core/loader/nso.h
+++ b/src/core/loader/nso.h
@@ -4,7 +4,9 @@
 
 #pragma once
 
+#include <array>
 #include <optional>
+#include <type_traits>
 #include "common/common_types.h"
 #include "common/swap.h"
 #include "core/file_sys/patch_manager.h"
@@ -16,6 +18,43 @@ class Process;
 
 namespace Loader {
 
+struct NSOSegmentHeader {
+    u32_le offset;
+    u32_le location;
+    u32_le size;
+    union {
+        u32_le alignment;
+        u32_le bss_size;
+    };
+};
+static_assert(sizeof(NSOSegmentHeader) == 0x10, "NsoSegmentHeader has incorrect size.");
+
+struct NSOHeader {
+    using SHA256Hash = std::array<u8, 0x20>;
+
+    struct RODataRelativeExtent {
+        u32_le data_offset;
+        u32_le size;
+    };
+
+    u32_le magic;
+    u32_le version;
+    u32 reserved;
+    u32_le flags;
+    std::array<NSOSegmentHeader, 3> segments; // Text, RoData, Data (in that order)
+    std::array<u8, 0x20> build_id;
+    std::array<u32_le, 3> segments_compressed_size;
+    std::array<u8, 0x1C> padding;
+    RODataRelativeExtent api_info_extent;
+    RODataRelativeExtent dynstr_extent;
+    RODataRelativeExtent dynsyn_extent;
+    std::array<SHA256Hash, 3> segment_hashes;
+
+    bool IsSegmentCompressed(size_t segment_num) const;
+};
+static_assert(sizeof(NSOHeader) == 0x100, "NSOHeader has incorrect size.");
+static_assert(std::is_trivially_copyable_v<NSOHeader>, "NSOHeader must be trivially copyable.");
+
 constexpr u64 NSO_ARGUMENT_DATA_ALLOCATION_SIZE = 0x9000;
 
 struct NSOArgumentHeader {