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Gamecard/3DSX: Support reading IFVC magic

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This commit is contained in:
Tony Wasserka 2024-03-24 16:08:49 +01:00
parent b4df51b519
commit 79a9221eaf
1 changed files with 10 additions and 0 deletions
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10
source/loader/gamecard.cpp
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@ -489,6 +489,16 @@ public:
auto program_code = ReadProgramCode(context, dot3dsxheader); auto program_code = ReadProgramCode(context, dot3dsxheader);
dest.Write(reinterpret_cast<char*>(program_code.data()), program_code.size()); dest.Write(reinterpret_cast<char*>(program_code.data()), program_code.size());
} else if (offset == ncch.romfs_offset.ToBytes() && num_bytes <= 4) {
// This is the location for the magic "IVFC" string in the RomFS
// header. 3DSX files don't contain this header, so we just return
// fake data instead.
// NOTE: NCCHOpenExeFSSection reads this specific location to
// ensure the RomFS was decrypted properly.
char data[] = "IVFC";
dest.Write(data, 4);
offset += 4;
num_bytes = 0;
} else if (offset >= ncch.romfs_offset.ToBytes() + 0x1000 && offset + num_bytes <= ncch.romfs_offset.ToBytes() + ncch.romfs_size.ToBytes()) { } else if (offset >= ncch.romfs_offset.ToBytes() + 0x1000 && offset + num_bytes <= ncch.romfs_offset.ToBytes() + ncch.romfs_size.ToBytes()) {
if (!dot3dsx_secondary_header) { if (!dot3dsx_secondary_header) {
throw std::runtime_error("Tried reading RomFS even though no RomFS is present"); throw std::runtime_error("Tried reading RomFS even though no RomFS is present");