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// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <memory>
#include "Common/FileUtil.h"
#include "Common/Swap.h"
#include "Core/Boot/Boot.h"
#include "Core/Boot/ElfReader.h"
#include "Core/HLE/HLE.h"
#include "Core/PowerPC/PowerPC.h"
bool CBoot::IsElfWii(const std::string& filename)
{
/* We already check if filename existed before we called this function, so
there is no need for another check, just read the file right away */
size_t filesize = File::GetSize(filename);
auto elf = std::make_unique<u8[]>(filesize);
{
File::IOFile f(filename, "rb");
f.ReadBytes(elf.get(), filesize);
}
// Use the same method as the DOL loader uses: search for mfspr from HID4,
// which should only be used in Wii ELFs.
//
// Likely to have some false positives/negatives, patches implementing a
// better heuristic are welcome.
// Swap these once, instead of swapping every word in the file.
u32 HID4_pattern = Common::swap32(0x7c13fba6);
u32 HID4_mask = Common::swap32(0xfc1fffff);
ElfReader reader(elf.get());
for (int i = 0; i < reader.GetNumSegments(); ++i)
{
if (reader.IsCodeSegment(i))
{
u32* code = (u32*)reader.GetSegmentPtr(i);
for (u32 j = 0; j < reader.GetSegmentSize(i) / sizeof(u32); ++j)
{
if ((code[j] & HID4_mask) == HID4_pattern)
return true;
}
}
}
return false;
}
bool CBoot::Boot_ELF(const std::string& filename)
{
// Read ELF from file
size_t filesize = File::GetSize(filename);
auto elf = std::make_unique<u8[]>(filesize);
{
File::IOFile f(filename, "rb");
f.ReadBytes(elf.get(), filesize);
}
// Load ELF into GameCube Memory
ElfReader reader(elf.get());
if (!reader.LoadIntoMemory())
return false;
const bool is_wii = IsElfWii(filename);
if (is_wii)
HID4.SBE = 1;
SetupBAT(is_wii);
if (!reader.LoadSymbols())
{
if (LoadMapFromFilename())
HLE::PatchFunctions();
}
else
{
HLE::PatchFunctions();
}
PC = reader.GetEntryPoint();
return true;
}
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