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ncch_container: choose the first id as extdata id when extended save data access is used
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2 changed files with 35 additions and 3 deletions
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@ -585,7 +585,25 @@ Loader::ResultStatus NCCHContainer::ReadExtdataId(u64& extdata_id) {
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return Loader::ResultStatus::ErrorNotUsed;
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if (exheader_header.arm11_system_local_caps.storage_info.other_attributes >> 1) {
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// Extdata id is not present when using extended savedata access
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// Using extended save data access
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// There would be multiple possible extdata IDs in this case. The best we can do for now is
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// guessing that the first one would be the main save.
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const std::array<u64, 6> extdata_ids{{
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exheader_header.arm11_system_local_caps.storage_info.extdata_id0.Value(),
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exheader_header.arm11_system_local_caps.storage_info.extdata_id1.Value(),
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exheader_header.arm11_system_local_caps.storage_info.extdata_id2.Value(),
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exheader_header.arm11_system_local_caps.storage_info.extdata_id3.Value(),
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exheader_header.arm11_system_local_caps.storage_info.extdata_id4.Value(),
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exheader_header.arm11_system_local_caps.storage_info.extdata_id5.Value(),
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}};
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for (u64 id : extdata_ids) {
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if (id) {
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// Found a non-zero ID, use it
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extdata_id = id;
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return Loader::ResultStatus::Success;
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}
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}
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return Loader::ResultStatus::ErrorNotUsed;
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}
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@ -125,9 +125,23 @@ struct ExHeader_SystemInfo {
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};
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struct ExHeader_StorageInfo {
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u64_le ext_save_data_id;
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union {
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u64_le ext_save_data_id;
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// When using extended savedata access
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// Prefer the ID specified in the most significant bits
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BitField<40, 20, u64_le> extdata_id3;
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BitField<20, 20, u64_le> extdata_id4;
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BitField<0, 20, u64_le> extdata_id5;
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};
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u8 system_save_data_id[8];
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u8 reserved[8];
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union {
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u64_le storage_accessible_unique_ids;
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// When using extended savedata access
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// Prefer the ID specified in the most significant bits
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BitField<40, 20, u64_le> extdata_id0;
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BitField<20, 20, u64_le> extdata_id1;
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BitField<0, 20, u64_le> extdata_id2;
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};
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u8 access_info[7];
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u8 other_attributes;
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};
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