Support for AFL_ENTRYPOINT (#898)

Co-authored-by: Your Name <you@example.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/frida_mode/src/entry.c b/frida_mode/src/entry.c
new file mode 100644
index 00000000..e71386a0
--- /dev/null
+++ b/frida_mode/src/entry.c
@@ -0,0 +1,50 @@
+#include "frida-gum.h"
+
+#include "debug.h"
+
+#include "entry.h"
+#include "instrument.h"
+#include "stalker.h"
+#include "util.h"
+
+extern void __afl_manual_init();
+
+guint64 entry_start = 0;
+
+static void entry_launch(void) {
+
+  __afl_manual_init();
+
+  /* Child here */
+  previous_pc = 0;
+
+}
+
+void entry_init(void) {
+
+  entry_start = util_read_address("AFL_ENTRYPOINT");
+  OKF("entry_point: 0x%016" G_GINT64_MODIFIER "X", entry_start);
+
+}
+
+void entry_run(void) {
+
+  if (entry_start == 0) { entry_launch(); }
+
+}
+
+static void entry_callout(GumCpuContext *cpu_context, gpointer user_data) {
+
+  UNUSED_PARAMETER(cpu_context);
+  UNUSED_PARAMETER(user_data);
+  entry_launch();
+
+}
+
+void entry_prologue(GumStalkerIterator *iterator, GumStalkerOutput *output) {
+
+  UNUSED_PARAMETER(output);
+  gum_stalker_iterator_put_callout(iterator, entry_callout, NULL, NULL);
+
+}
+