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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23
src/windows-emulator/exception_dispatch.cpp
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@@ -4,6 +4,9 @@
#include "cpu_context.hpp"
#include "windows_emulator.hpp"
#include "common/segment_utils.hpp"
#include "wow64_heaven_gate.hpp"
namespace
{
using exception_record = EMU_EXCEPTION_RECORD<EmulatorTraits<Emu64>>;
@@ -111,9 +114,6 @@ namespace
emu.write_memory(new_sp, zero_memory.data(), zero_memory.size());
emu.reg(x86_register::rsp, new_sp);
emu.reg(x86_register::rip, dispatcher);
const emulator_object<CONTEXT64> context_record_obj{emu, new_sp};
context_record_obj.write(*reinterpret_cast<CONTEXT64*>(pointers.ContextRecord));
@@ -134,6 +134,23 @@ namespace
frame.cs = record.SegCs;
frame.eflags = record.EFlags;
});
const auto cs_selector = emu.reg<uint16_t>(x86_register::cs);
const auto bitness = segment_utils::get_segment_bitness(emu, cs_selector);
if (!bitness || *bitness != segment_utils::segment_bitness::bit32)
{
emu.reg(x86_register::rsp, new_sp);
emu.reg(x86_register::rip, dispatcher);
return;
}
emu.reg(x86_register::rax, dispatcher);
emu.reg(x86_register::rbx, new_sp);
emu.reg(x86_register::rcx, static_cast<uint64_t>(wow64::heaven_gate::kUserCodeSelector));
emu.reg(x86_register::rdx, static_cast<uint64_t>(wow64::heaven_gate::kUserStackSelector));
emu.reg(x86_register::rsp, wow64::heaven_gate::kStackTop);
emu.reg(x86_register::rip, wow64::heaven_gate::kCodeBase);
}
}