Merge branch 'dev' into going_atomic

1 files changed, 97 insertions, 0 deletions

diff --git a/frida_mode/src/persistent/persistent.c b/frida_mode/src/persistent/persistent.c
new file mode 100644
index 00000000..2ec5b9cc
--- /dev/null
+++ b/frida_mode/src/persistent/persistent.c
@@ -0,0 +1,97 @@
+#include <dlfcn.h>
+
+#include "frida-gum.h"
+
+#include "config.h"
+#include "debug.h"
+
+#include "persistent.h"
+#include "util.h"
+
+int                    __afl_sharedmem_fuzzing = 0;
+afl_persistent_hook_fn hook = NULL;
+guint64                persistent_start = 0;
+guint64                persistent_count = 0;
+guint64                persistent_ret = 0;
+guint64                persistent_ret_offset = 0;
+gboolean               persistent_debug = FALSE;
+
+void persistent_init(void) {
+
+  char *hook_name = getenv("AFL_FRIDA_PERSISTENT_HOOK");
+
+  persistent_start = util_read_address("AFL_FRIDA_PERSISTENT_ADDR");
+  persistent_count = util_read_num("AFL_FRIDA_PERSISTENT_CNT");
+  persistent_ret = util_read_address("AFL_FRIDA_PERSISTENT_RET");
+  persistent_ret_offset =
+      util_read_address("AFL_FRIDA_PERSISTENT_RETADDR_OFFSET");
+
+  if (getenv("AFL_FRIDA_PERSISTENT_DEBUG") != NULL) { persistent_debug = TRUE; }
+
+  if (persistent_count != 0 && persistent_start == 0) {
+
+    FATAL(
+        "AFL_FRIDA_PERSISTENT_ADDR must be specified if "
+        "AFL_FRIDA_PERSISTENT_CNT is");
+
+  }
+
+  if (persistent_ret != 0 && persistent_start == 0) {
+
+    FATAL(
+        "AFL_FRIDA_PERSISTENT_ADDR must be specified if "
+        "AFL_FRIDA_PERSISTENT_RET is");
+
+  }
+
+  if (persistent_ret_offset != 0 && persistent_ret == 0) {
+
+    FATAL(
+        "AFL_FRIDA_PERSISTENT_RET must be specified if "
+        "AFL_FRIDA_PERSISTENT_RETADDR_OFFSET is");
+
+  }
+
+  if (persistent_start != 0 && persistent_count == 0) persistent_count = 1000;
+
+  if (persistent_count != 0 && persistent_count < 100)
+    WARNF("Persistent count out of recommended range (<100)");
+
+  if (persistent_start != 0 && !persistent_is_supported())
+    FATAL("Persistent mode not supported on this architecture");
+
+  OKF("Instrumentation - persistent mode [%c] (0x%016" G_GINT64_MODIFIER "X)",
+      persistent_start == 0 ? ' ' : 'X', persistent_start);
+  OKF("Instrumentation - persistent count [%c] (%" G_GINT64_MODIFIER "d)",
+      persistent_start == 0 ? ' ' : 'X', persistent_count);
+  OKF("Instrumentation - hook [%s]", hook_name);
+
+  OKF("Instrumentation - persistent ret [%c] (0x%016" G_GINT64_MODIFIER "X)",
+      persistent_ret == 0 ? ' ' : 'X', persistent_ret);
+  OKF("Instrumentation - persistent ret offset [%c] (%" G_GINT64_MODIFIER "d)",
+      persistent_ret_offset == 0 ? ' ' : 'X', persistent_ret_offset);
+
+  if (hook_name != NULL) {
+
+    void *hook_obj = dlopen(hook_name, RTLD_NOW);
+    if (hook_obj == NULL)
+      FATAL("Failed to load AFL_FRIDA_PERSISTENT_HOOK (%s)", hook_name);
+
+    int (*afl_persistent_hook_init_ptr)(void) =
+        dlsym(hook_obj, "afl_persistent_hook_init");
+    if (afl_persistent_hook_init_ptr == NULL)
+      FATAL("Failed to find afl_persistent_hook_init in %s", hook_name);
+
+    if (afl_persistent_hook_init_ptr() == 0)
+      FATAL("afl_persistent_hook_init returned a failure");
+
+    hook = (afl_persistent_hook_fn)dlsym(hook_obj, "afl_persistent_hook");
+    if (hook == NULL)
+      FATAL("Failed to find afl_persistent_hook in %s", hook_name);
+
+    __afl_sharedmem_fuzzing = 1;
+
+  }
+
+}
+