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make TryMapVATR overrideable and implement it for ELFs

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This commit is contained in:
LukeFZ
2024-11-09 15:43:22 +01:00
parent 08431b774a
commit e0e8d052ea
2 changed files with 20 additions and 3 deletions
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21
Il2CppInspector.Common/FileFormatStreams/ElfReader.cs
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@@ -528,11 +528,28 @@ namespace Il2CppInspector
// 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(ulong uiAddr) {
// Additions in the argument to MapVATR may cause an overflow which should be discarded for 32-bit files
if (!TryMapVATR(uiAddr, out var offset))
throw new InvalidOperationException("Failed to map virtual address");
return offset;
}
public override bool TryMapVATR(ulong uiAddr, out uint fileOffset)
{
// Additions in the argument to MapVATR may cause an overflow which should be discarded for 32-bit files
if (Bits == 32)
uiAddr &= 0xffff_ffff;
var program_header_table = this.PHT.First(x => uiAddr >= conv.ULong(x.p_vaddr) && uiAddr <= conv.ULong(conv.Add(x.p_vaddr, x.p_filesz)));
return (uint) (uiAddr - conv.ULong(conv.Sub(program_header_table.p_vaddr, program_header_table.p_offset)));
var phtEntry = PHT.FirstOrDefault(x => uiAddr >= conv.ULong(x.p_vaddr) && uiAddr <= conv.ULong(conv.Add(x.p_vaddr, x.p_filesz)));
if (phtEntry == null)
{
fileOffset = 0;
return false;
}
fileOffset = (uint)(uiAddr - conv.ULong(conv.Sub(phtEntry.p_vaddr, phtEntry.p_offset)));
return true;
}
public override ulong MapFileOffsetToVA(uint offset) {

2
Il2CppInspector.Common/FileFormatStreams/FileFormatStream.cs
View File

@@ -284,7 +284,7 @@ namespace Il2CppInspector
public virtual uint MapVATR(ulong uiAddr) => (uint) uiAddr;
// Try to map an RVA to an offset in the file image
public bool TryMapVATR(ulong uiAddr, out uint fileOffset) {
public virtual bool TryMapVATR(ulong uiAddr, out uint fileOffset) {
try {
fileOffset = MapVATR(uiAddr);
return true;