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-rw-r--r--code/qcommon/vm_x86.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/code/qcommon/vm_x86.c b/code/qcommon/vm_x86.c
index 7a0c162..527ee72 100644
--- a/code/qcommon/vm_x86.c
+++ b/code/qcommon/vm_x86.c
@@ -22,6 +22,9 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
// vm_x86.c -- load time compiler and execution environment for x86
#include "vm_local.h"
+#ifdef _WIN32
+#include <windows.h>
+#endif
#ifdef __FreeBSD__ // rb0101023
#include <sys/types.h>
@@ -1081,6 +1084,11 @@ void VM_Compile( vm_t *vm, vmHeader_t *header ) {
vm->codeBase = mmap(NULL, compiledOfs, PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
if(vm->codeBase == (void*)-1)
Com_Error(ERR_DROP, "VM_CompileX86: can't mmap memory");
+#elif _WIN32
+ // allocate memory with EXECUTE permissions under windows.
+ vm->codeBase = VirtualAlloc(NULL, compiledOfs, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+ if(!vm->codeBase)
+ Com_Error(ERR_DROP, "VM_CompileX86: VirtualAlloc failed");
#else
vm->codeBase = malloc(compiledOfs);
#endif
@@ -1090,6 +1098,14 @@ void VM_Compile( vm_t *vm, vmHeader_t *header ) {
#ifdef VM_X86_MMAP
if(mprotect(vm->codeBase, compiledOfs, PROT_READ|PROT_EXEC))
Com_Error(ERR_DROP, "VM_CompileX86: mprotect failed");
+#elif _WIN32
+ {
+ DWORD oldProtect = 0;
+
+ // remove write permissions.
+ if(!VirtualProtect(vm->codeBase, compiledOfs, PAGE_EXECUTE_READ, &oldProtect))
+ Com_Error(ERR_DROP, "VM_CompileX86: VirtualProtect failed");
+ }
#endif
Z_Free( buf );
@@ -1108,6 +1124,8 @@ void VM_Destroy_Compiled(vm_t* self)
{
#ifdef VM_X86_MMAP
munmap(self->codeBase, self->codeLength);
+#elif _WIN32
+ VirtualFree(self->codeBase, self->codeLength, MEM_RELEASE);
#else
free(self->codeBase);
#endif