Lightemerald/windows-user-space-emulator
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Fix FS and GS handling

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This commit is contained in:
ssvine
2025-12-30 15:19:05 +03:00
parent 57ad277158
commit f25ee26c36
7 changed files with 93 additions and 53 deletions
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12
src/windows-emulator/windows_emulator.cpp
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@@ -517,6 +517,18 @@ void windows_emulator::setup_hooks()
this->emu().hook_memory_violation(
[&](const uint64_t address, const size_t size, const memory_operation operation, const memory_violation_type type) {
if (this->emu().reg<uint16_t>(x86_register::cs) == 0x33)
{
// loading gs selector only works in 64-bit mode
const auto required_gs_base = this->current_thread().gs_segment->get_base();
const auto actual_gs_base = this->emu().get_segment_base(x86_register::gs);
if (actual_gs_base != required_gs_base)
{
this->emu().set_segment_base(x86_register::gs, required_gs_base);
return memory_violation_continuation::restart;
}
}
auto region = this->memory.get_region_info(address);
if (region.permissions.is_guarded())
{