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Correctly handle valid virtual addresses not mapped to the image file

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This commit is contained in:
Katy Coe
2019-10-16 18:30:30 +02:00
parent 38e04b72b7
commit 41d6b45f3b
4 changed files with 17 additions and 7 deletions
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5
Il2CppInspector/FileFormatReaders/ElfReader.cs
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@@ -84,9 +84,12 @@ namespace Il2CppInspector
return ReadArray<uint>(init_array.sh_offset, (int) init_array.sh_size / 4);
}
// Map a virtual address to an offset into the image file. Throws an exception if the virtual address is not mapped into the file.
// Note if uiAddr is a valid segment but filesz < memsz and the adjusted uiAddr falls between the range of filesz and memsz,
// an exception will be thrown. This area of memory is assumed to contain all zeroes.
public override uint MapVATR(uint uiAddr)
{
var program_header_table = program_table_element.First(x => uiAddr >= x.p_vaddr && uiAddr <= (x.p_vaddr + x.p_memsz));
var program_header_table = program_table_element.First(x => uiAddr >= x.p_vaddr && uiAddr <= (x.p_vaddr + x.p_filesz));
return uiAddr - (program_header_table.p_vaddr - program_header_table.p_offset);
}
}