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Implement 3dsx RomFS

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This commit is contained in:
Cruel 2015-09-21 01:30:06 -04:00
parent f7b4f44adf
commit d60a9be5c6
3 changed files with 61 additions and 3 deletions
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40
src/core/loader/3dsx.cpp
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@ -62,6 +62,10 @@ struct THREEDSX_Header
// Sizes of the code, rodata and data segments +
// size of the BSS section (uninitialized latter half of the data segment)
u32 code_seg_size, rodata_seg_size, data_seg_size, bss_size;
// offset and size of smdh
u32 smdh_offset, smdh_size;
// offset to filesystem
u32 fs_offset;
};
// Relocation header: all fields (even extra unknown fields) are guaranteed to be relocation counts.
@ -267,4 +271,40 @@ ResultStatus AppLoader_THREEDSX::Load() {
return ResultStatus::Success;
}
ResultStatus AppLoader_THREEDSX::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) {
if (!file.IsOpen())
return ResultStatus::Error;
// Reset read pointer in case this file has been read before.
file.Seek(0, SEEK_SET);
THREEDSX_Header hdr;
if (file.ReadBytes(&hdr, sizeof(THREEDSX_Header)) != sizeof(THREEDSX_Header))
return ResultStatus::Error;
if (hdr.header_size != sizeof(THREEDSX_Header))
return ResultStatus::Error;
// Check if the 3DSX has a RomFS...
if (hdr.fs_offset != 0) {
u32 romfs_offset = hdr.fs_offset;
u32 romfs_size = file.GetSize() - hdr.fs_offset;
LOG_DEBUG(Loader, "RomFS offset: 0x%08X", romfs_offset);
LOG_DEBUG(Loader, "RomFS size: 0x%08X", romfs_size);
// We reopen the file, to allow its position to be independent from file's
romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb");
if (!romfs_file->IsOpen())
return ResultStatus::Error;
offset = romfs_offset;
size = romfs_size;
return ResultStatus::Success;
}
LOG_DEBUG(Loader, "3DSX has no RomFS");
return ResultStatus::ErrorNotUsed;
}
} // namespace Loader