From 405382cbddea8b99543c3fddcaa5738b1ed3ade3 Mon Sep 17 00:00:00 2001
From: WorksButNotTested <62701594+WorksButNotTested@users.noreply.github.com>
Date: Tue, 6 Jul 2021 20:15:30 +0100
Subject: Frida build fixes (#1010)

Co-authored-by: Your Name <you@example.com>
---
 frida_mode/hook/frida_hook.c | 65 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 frida_mode/hook/frida_hook.c

(limited to 'frida_mode/hook/frida_hook.c')

diff --git a/frida_mode/hook/frida_hook.c b/frida_mode/hook/frida_hook.c
new file mode 100644
index 00000000..96446d6f
--- /dev/null
+++ b/frida_mode/hook/frida_hook.c
@@ -0,0 +1,65 @@
+/*
+ *
+ * Modify this file to set the right registers with the fuzz input and length.
+ * It is a good idea to check input_buf_len to be not larger than the
+ * destination buffer!
+ *
+ */
+
+
+#include <stdint.h>
+#include <string.h>
+
+#include "frida-gumjs.h"
+
+#if defined(__x86_64__)
+
+__attribute__((visibility("default"))) void afl_persistent_hook(
+    GumCpuContext *regs, uint8_t *input_buf, uint32_t input_buf_len) {
+
+  // do a length check matching the target!
+
+  memcpy((void *)regs->rdi, input_buf, input_buf_len);
+  regs->rsi = input_buf_len;
+
+}
+
+#elif defined(__i386__)
+
+__attribute__((visibility("default"))) void afl_persistent_hook(
+    GumCpuContext *regs, uint8_t *input_buf, uint32_t input_buf_len) {
+
+  // do a length check matching the target!
+
+  void **esp = (void **)regs->esp;
+  void * arg1 = esp[0];
+  void **arg2 = &esp[1];
+  memcpy(arg1, input_buf, input_buf_len);
+  *arg2 = (void *)input_buf_len;
+
+}
+
+#elif defined(__aarch64__)
+
+__attribute__((visibility("default"))) void afl_persistent_hook(
+    GumCpuContext *regs, uint8_t *input_buf, uint32_t input_buf_len) {
+
+  // do a length check matching the target!
+
+  memcpy((void *)regs->x[0], input_buf, input_buf_len);
+  regs->x[1] = input_buf_len;
+
+}
+
+#else
+  #pragma error "Unsupported architecture"
+#endif
+
+__attribute__((visibility("default"))) int afl_persistent_hook_init(void) {
+
+  // 1 for shared memory input (faster), 0 for normal input (you have to use
+  // read(), input_buf will be NULL)
+  return 1;
+
+}
+
-- 
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