Lightemerald/windows-user-space-emulator
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Comprehensive WOW64 subsystem implementation

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This commit is contained in:
brian
2025-10-13 19:53:14 +08:00
parent 9453123db0
commit 65eecf1cfd
51 changed files with 3772 additions and 283 deletions
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18
src/windows-emulator/syscall_dispatcher.cpp
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@@ -65,7 +65,8 @@ void syscall_dispatcher::dispatch(windows_emulator& win_emu)
auto& context = win_emu.process;
const auto address = emu.read_instruction_pointer();
const auto syscall_id = emu.reg<uint32_t>(x86_register::eax);
const auto raw_syscall_id = emu.reg<uint32_t>(x86_register::eax);
const auto syscall_id = raw_syscall_id & 0xFFFF; // Only take low bits for WOW64 compatibility
const syscall_context c{
.win_emu = win_emu,
@@ -79,7 +80,7 @@ void syscall_dispatcher::dispatch(windows_emulator& win_emu)
const auto entry = this->handlers_.find(syscall_id);
if (entry == this->handlers_.end())
{
win_emu.log.error("Unknown syscall: 0x%X\n", syscall_id);
win_emu.log.error("Unknown syscall: 0x%X (raw: 0x%X)\n", syscall_id, raw_syscall_id);
c.emu.reg<uint64_t>(x86_register::rax, STATUS_NOT_SUPPORTED);
c.emu.stop();
return;
@@ -93,23 +94,30 @@ void syscall_dispatcher::dispatch(windows_emulator& win_emu)
if (!entry->second.handler)
{
win_emu.log.error("Unimplemented syscall: %s - 0x%X\n", entry->second.name.c_str(), syscall_id);
win_emu.log.error("Unimplemented syscall: %s - 0x%X (raw: 0x%X)\n", entry->second.name.c_str(), syscall_id, raw_syscall_id);
c.emu.reg<uint64_t>(x86_register::rax, STATUS_NOT_SUPPORTED);
c.emu.stop();
return;
}
entry->second.handler(c);
if (c.write_status && !c.retrigger_syscall)
{
const auto status = static_cast<uint32_t>(emu.reg<uint64_t>(x86_register::rax));
win_emu.log.print(color::dark_gray, "Syscall return: %s (0x%X, raw: 0x%X) -> 0x%08X\n", entry->second.name.c_str(), syscall_id,
raw_syscall_id, status);
}
}
catch (std::exception& e)
{
win_emu.log.error("Syscall threw an exception: %X (0x%" PRIx64 ") - %s\n", syscall_id, address, e.what());
win_emu.log.error("Syscall threw an exception: %X (raw: %X) (0x%" PRIx64 ") - %s\n", syscall_id, raw_syscall_id, address, e.what());
emu.reg<uint64_t>(x86_register::rax, STATUS_UNSUCCESSFUL);
emu.stop();
}
catch (...)
{
win_emu.log.error("Syscall threw an unknown exception: %X (0x%" PRIx64 ")\n", syscall_id, address);
win_emu.log.error("Syscall threw an unknown exception: %X (raw: %X) (0x%" PRIx64 ")\n", syscall_id, raw_syscall_id, address);
emu.reg<uint64_t>(x86_register::rax, STATUS_UNSUCCESSFUL);
emu.stop();
}