Lightemerald/windows-user-space-emulator
2
0
Fork 0
mirror of https://github.com/momo5502/emulator.git synced 2026-01-25 14:41:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

Disable SSE4.x

Browse Source
This commit is contained in:
Igor Pissolati
2025-10-20 22:26:15 -03:00
committed by GitHub
parent 0e158b6064
commit 6fe93375e6
1 changed files with 26 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/analyzer/main.cpp
View File

@@ -492,8 +492,11 @@ namespace
const auto& exe = *win_emu->mod_manager.executable;
win_emu->emu().hook_instruction(x86_hookable_instructions::cpuid, [&] {
const auto rip = win_emu->emu().read_instruction_pointer();
const auto leaf = win_emu->emu().reg<uint32_t>(x86_register::eax);
auto& emu = win_emu->emu();
const auto rip = emu.read_instruction_pointer();
const auto leaf = emu.reg<uint32_t>(x86_register::eax);
const auto sub = emu.reg<uint32_t>(x86_register::ecx);
const auto mod = get_module_if_interesting(win_emu->mod_manager, options.modules, rip);
if (mod.has_value() && (!concise_logging || context.cpuid_cache.insert({rip, leaf}).second))
@@ -502,6 +505,27 @@ namespace
(*mod) ? (*mod)->name.c_str() : "<N/A>");
}
if (leaf == 1)
{
std::array<int, 4> regs = {0, 0, 0, 0};
__cpuidex(regs.data(), static_cast<int>(leaf), static_cast<int>(sub));
uint32_t eax = static_cast<uint32_t>(regs[0]);
uint32_t ebx = static_cast<uint32_t>(regs[1]);
uint32_t ecx = static_cast<uint32_t>(regs[2]);
uint32_t edx = static_cast<uint32_t>(regs[3]);
// Disable SSE4.x
ecx &= ~(1u << 19); // SSE4.1
ecx &= ~(1u << 20); // SSE4.2
emu.reg<uint32_t>(x86_register::eax, eax);
emu.reg<uint32_t>(x86_register::ebx, ebx);
emu.reg<uint32_t>(x86_register::ecx, ecx);
emu.reg<uint32_t>(x86_register::edx, edx);
return instruction_hook_continuation::skip_instruction;
}
return instruction_hook_continuation::run_instruction;
});