From b76e33d5262a0cc53a729a81441dc470fd733342 Mon Sep 17 00:00:00 2001
From: 8dcc <8dcc.git@gmail.com>
Date: Fri, 21 Jul 2023 06:25:11 +0200
Subject: [PATCH] Add reload option to loader

Automatically if loaded
---
 inject.sh | 44 ++++++++++++++++++++++++++++++++++----------
 1 file changed, 34 insertions(+), 10 deletions(-)

diff --git a/inject.sh b/inject.sh
index d29bccb..14f3efc 100755
--- a/inject.sh
+++ b/inject.sh
@@ -3,16 +3,40 @@
 pid=$(pidof "hl_linux")
 libpath=$(realpath "libhlcheat.so")
 
-# 0x2 -> RTLD_NOW
-sudo gdb -n -q -batch                                   \
-    -ex "attach $pid"                                   \
-    -ex "set \$dlopen = (void* (*)(char*, int))dlopen"  \
-    -ex "set \$dlerror =  (char* (*)(void))dlerror"     \
-    -ex "call \$dlopen(\"$libpath\", 2)"                \
-    -ex "call \$dlerror()"                              \
-    -ex "detach"                                        \
-    -ex "quit"
+# Used to echo the command. For debugging.
+#set -x
 
-#   -ex "set \$dlclose = (int (*)(void*))dlclose"       \
+if grep -q "$libpath" "/proc/$pid/maps"; then
+    echo -e "hl-cheat already loaded. Reloading...\n";
 
+    # 0x2 -> RTLD_NOW
+    # 0x6 -> RTLD_LAZY | RTLD_NOLOAD
+    # For more info on the 3 mid lines, see self_unload() in main.c
+    sudo gdb -n -q -batch                                   \
+         -ex "attach $pid"                                  \
+         -ex "set \$dlopen = (void* (*)(char*, int))dlopen" \
+         -ex "set \$dlclose = (int (*)(void*))dlclose"      \
+         -ex "set \$dlerror =  (char* (*)(void))dlerror"    \
+                                                            \
+         -ex "set \$self = \$dlopen(\"$libpath\", 6)"        \
+         -ex "call \$dlclose(\$self)"                         \
+         -ex "call \$dlclose(\$self)"                         \
+                                                            \
+         -ex "call \$dlopen(\"$libpath\", 2)"               \
+         -ex "call \$dlerror()"                             \
+         -ex "detach"                                       \
+         -ex "quit"
+else
+    sudo gdb -n -q -batch                                   \
+         -ex "attach $pid"                                  \
+         -ex "set \$dlopen = (void* (*)(char*, int))dlopen" \
+         -ex "set \$dlclose = (int (*)(void*))dlclose"      \
+         -ex "set \$dlerror =  (char* (*)(void))dlerror"    \
+         -ex "call \$dlopen(\"$libpath\", 2)"               \
+         -ex "call \$dlerror()"                             \
+         -ex "detach"                                       \
+         -ex "quit"
+fi
+
+set +x
 echo -e "\nDone."