Lightemerald/windows-user-space-emulator
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Update hook_memory_violation to handle guard page violations

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This commit is contained in:
3fault
2025-07-01 19:17:05 -04:00
parent 1276c7e2bc
commit 2e17f37f78
3 changed files with 17 additions and 5 deletions
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2
src/analyzer/main.cpp
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@@ -317,7 +317,7 @@ namespace
{
for (const auto& section : exe.sections)
{
if ((section.region.permissions & memory_permission::exec) != memory_permission::exec)
if ((section.region.permissions.common & memory_permission::exec) != memory_permission::exec)
{
continue;
}

4
src/emulator/memory_region.hpp
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@@ -1,12 +1,12 @@
#pragma once
#include "memory_permission.hpp"
#include "windows-emulator/memory_permission_ext.hpp"
#include <cstddef>
struct basic_memory_region
{
uint64_t start{};
size_t length{}; // uint64_t?
memory_permission permissions{};
nt_memory_permission permissions{};
};
struct memory_region : basic_memory_region

16
src/windows-emulator/windows_emulator.cpp
View File

@@ -11,6 +11,7 @@
#include "apiset/apiset.hpp"
#include "network/static_socket_factory.hpp"
#include "windows-emulator/memory_permission_ext.hpp"
constexpr auto MAX_INSTRUCTIONS_PER_TIME_SLICE = 0x20000;
@@ -499,8 +500,19 @@ 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) {
this->callbacks.on_memory_violate(address, size, operation, type);
dispatch_access_violation(this->emu(), this->process, address, operation);
auto region = this->memory.get_region_info(address);
if (region.permissions.is_guarded())
{
// Unset the GUARD_PAGE flag and dispatch a STATUS_GUARD_PAGE_VIOLATION
this->memory.protect_memory(region.allocation_base, region.length, region.permissions & ~memory_permission_ext::guard);
dispatch_guard_page_violation(this->emu(), this->process, address, operation);
}
else
{
this->callbacks.on_memory_violate(address, size, operation, type);
dispatch_access_violation(this->emu(), this->process, address, operation);
}
return memory_violation_continuation::resume;
});