DBG: implement memcpy command

src/dbg/commands/cmd-memory-operations.cpp

@@ -96,6 +96,33 @@ bool cbDebugMemset(int argc, char* argv[])
     return true;
 }
 
+bool cbDebugMemcpy(int argc, char* argv[])
+{
+    if(IsArgumentsLessThan(argc, 4))
+        return false;
+
+    duint dst = 0, src = 0, size = 0;
+    if(!valfromstring(argv[1], &dst, false) || !valfromstring(argv[2], &src, false) || !valfromstring(argv[3], &size, false))
+        return false;
+
+    duint totalNumberOfBytesWritten = 0;
+    std::vector<uint8_t> buffer;
+    buffer.resize(PAGE_SIZE); //copy a page at a time
+    for(size_t i = 0; i < size; i += buffer.size())
+    {
+        duint NumberOfBytesRead = 0;
+        auto readOk = MemRead(src + i, buffer.data(), min(buffer.size(), size - i), &NumberOfBytesRead);
+        duint NumberOfBytesWritten = 0;
+        auto writeOk = MemWrite(dst + i, buffer.data(), NumberOfBytesRead, &NumberOfBytesWritten);
+        totalNumberOfBytesWritten += NumberOfBytesWritten;
+        if(!readOk || !writeOk)
+            break;
+    }
+    GuiUpdateAllViews();
+    varset("$result", totalNumberOfBytesWritten, false);
+    return true;
+}
+
 bool cbDebugGetPageRights(int argc, char* argv[])
 {
     duint addr = 0;

src/dbg/commands/cmd-memory-operations.h

@@ -5,6 +5,7 @@
 bool cbDebugAlloc(int argc, char* argv[]);
 bool cbDebugFree(int argc, char* argv[]);
 bool cbDebugMemset(int argc, char* argv[]);
+bool cbDebugMemcpy(int argc, char* argv[]);
 bool cbDebugGetPageRights(int argc, char* argv[]);
 bool cbDebugSetPageRights(int argc, char* argv[]);
 bool cbInstrSavedata(int argc, char* argv[]);

src/dbg/commands/cmd-undocumented.cpp

@@ -413,7 +413,7 @@ bool cbInstrMeminfo(int argc, char* argv[])
 {
     if(argc < 3)
     {
-        dputs_untranslated("Usage: meminfo a/r, addr");
+        dputs_untranslated("Usage: meminfo a/r, addr[, size]");
         return false;
     }
     duint addr;
@@ -424,11 +424,17 @@ bool cbInstrMeminfo(int argc, char* argv[])
     }
     if(argv[1][0] == 'a')
     {
-        unsigned char buf = 0;
-        if(!ReadProcessMemory(fdProcessInfo->hProcess, (void*)addr, &buf, sizeof(buf), nullptr))
-            dputs_untranslated("ReadProcessMemory failed!");
-        else
-            dprintf_untranslated("Data: %02X\n", buf);
+        duint size = 1;
+        if(argc > 3 && !valfromstring(argv[3], &size))
+        {
+            dputs_untranslated("Invalid argument");
+            return false;
+        }
+        std::vector<uint8_t> buf;
+        buf.resize(size);
+        SIZE_T NumberOfBytesRead = 0;
+        ReadProcessMemory(fdProcessInfo->hProcess, (const void*)addr, buf.data(), buf.size(), &NumberOfBytesRead);
+        dprintf_untranslated("Data: %s\n", StringUtils::ToHex(buf.data(), NumberOfBytesRead).c_str());
     }
     else if(argv[1][0] == 'r')
     {

src/dbg/x64dbg.cpp

@@ -239,6 +239,7 @@ static void registercommands()
     dbgcmdnew("alloc", cbDebugAlloc, true); //allocate memory
     dbgcmdnew("free", cbDebugFree, true); //free memory
     dbgcmdnew("Fill,memset", cbDebugMemset, true); //memset
+    dbgcmdnew("memcpy", cbDebugMemcpy, true); //memcpy
     dbgcmdnew("getpagerights,getrightspage", cbDebugGetPageRights, true);
     dbgcmdnew("setpagerights,setrightspage", cbDebugSetPageRights, true);
     dbgcmdnew("savedata", cbInstrSavedata, true); //save data to disk