From bc23cc9eca8a0f6053f0ef7a6087dfbb7a764df8 Mon Sep 17 00:00:00 2001
From: Warmist <Warmist@gmail.com>
Date: Thu, 28 Jul 2011 01:00:12 +0300
Subject: [PATCH] Made Process::setPermisions functions, to set memory page's
 permisions

---
 library/Process-linux.cpp        | 13 +++++++++++++
 library/Process-windows.cpp      | 15 +++++++++++++++
 library/include/dfhack/Process.h |  3 +++
 3 files changed, 31 insertions(+)

diff --git a/library/Process-linux.cpp b/library/Process-linux.cpp
index 23d8baf12..937bd155b 100644
--- a/library/Process-linux.cpp
+++ b/library/Process-linux.cpp
@@ -25,6 +25,7 @@ distribution.
 #include "Internal.h"
 #include <dirent.h>
 #include <errno.h>
+#include <sys/mman.h>
 
 #include <string>
 #include <vector>
@@ -176,4 +177,16 @@ string Process::getPath()
 int Process::getPID()
 {
     return getpid();
+}
+
+bool Process::setPermisions(const t_memrange & range,const t_memrange &trgrange)
+{
+	int result;
+	int protect=0;
+	if(trgrange.read)protect|=PROT_READ;
+	if(trgrange.write)protect|=PROT_WRITE;
+	if(trgrange.execute)protect|=PROT_EXECUTE;
+	result=mprotect((void *)range.start, range.end-range.start,protect);
+
+	return result==0;
 }
\ No newline at end of file
diff --git a/library/Process-windows.cpp b/library/Process-windows.cpp
index 2edfc6325..88b77891e 100644
--- a/library/Process-windows.cpp
+++ b/library/Process-windows.cpp
@@ -356,3 +356,18 @@ string Process::getPath()
     string out(String);
     return(out.substr(0,out.find_last_of("\\")));
 }
+
+bool Process::setPermisions(const t_memrange & range,const t_memrange &trgrange)
+{
+	DWORD newprotect=0;
+	if(trgrange.read && !trgrange.write && !trgrange.execute)newprotect=PAGE_READONLY;
+	if(trgrange.read && trgrange.write && !trgrange.execute)newprotect=PAGE_READWRITE;
+	if(!trgrange.read && !trgrange.write && trgrange.execute)newprotect=PAGE_EXECUTE;
+	if(trgrange.read && !trgrange.write && trgrange.execute)newprotect=PAGE_EXECUTE_READ;
+	if(trgrange.read && trgrange.write && trgrange.execute)newprotect=PAGE_EXECUTE_READWRITE;
+	DWORD oldprotect=0;
+	bool result;
+	result=VirtualProtect((LPVOID)range.start,range.end-range.start,newprotect,&oldprotect);
+	
+	return result;
+}
diff --git a/library/include/dfhack/Process.h b/library/include/dfhack/Process.h
index d2ca7e355..df681c475 100644
--- a/library/include/dfhack/Process.h
+++ b/library/include/dfhack/Process.h
@@ -269,6 +269,9 @@ namespace DFHack
             int getPID();
             /// get the DF Process FilePath
             std::string getPath();
+
+			/// modify permisions of memory range
+			bool setPermisions(const t_memrange & range,const t_memrange &trgrange);
     private:
         VersionInfo * my_descriptor;
         PlatformSpecific *d;