diff options
Diffstat (limited to 'Private/Source')
| -rw-r--r-- | Private/Source/PageManager.cxx | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Private/Source/PageManager.cxx b/Private/Source/PageManager.cxx index d6455a18..7dec0343 100644 --- a/Private/Source/PageManager.cxx +++ b/Private/Source/PageManager.cxx @@ -10,6 +10,9 @@ #include <KernelKit/DebugOutput.hpp> #include <NewKit/PageManager.hpp> +//! null deref will throw (Page Zero detected, aborting program!) +#define kProtectedRegionEnd 512 + namespace HCore { PTEWrapper::PTEWrapper(Boolean Rw, Boolean User, Boolean ExecDisable, UIntPtr VirtAddr) @@ -23,11 +26,12 @@ PTEWrapper::PTEWrapper(Boolean Rw, Boolean User, Boolean ExecDisable, m_Present(true), m_Accessed(false) { // special case for the null region. - if (VirtAddr == 0) { + if (VirtAddr <= kProtectedRegionEnd) { m_Wt = false; m_Rw = false; m_Cache = false; m_Shareable = false; + m_ExecDisable = true; } } |