1 files changed, 34 insertions, 0 deletions
diff --git a/utils/qemu_persistent_hook/read_into_rdi.c b/utils/qemu_persistent_hook/read_into_rdi.c
new file mode 100644
index 00000000..f4a8ae59
--- /dev/null
+++ b/utils/qemu_persistent_hook/read_into_rdi.c
@@ -0,0 +1,34 @@
+#include "../../qemu_mode/qemuafl/qemuafl/api.h"
+
+#include <stdio.h>
+#include <string.h>
+
+void afl_persistent_hook(struct x86_64_regs *regs, uint64_t guest_base,
+                         uint8_t *input_buf, uint32_t input_buf_len) {
+\
+#define g2h(x) ((void *)((unsigned long)(x) + guest_base))
+#define h2g(x) ((uint64_t)(x)-guest_base)
+
+  // In this example the register RDI is pointing to the memory location
+  // of the target buffer, and the length of the input is in RSI.
+  // This can be seen with a debugger, e.g. gdb (and "disass main")
+
+  printf("Placing input into 0x%lx\n", regs->rdi);
+
+  if (input_buf_len > 1024) input_buf_len = 1024;
+  memcpy(g2h(regs->rdi), input_buf, input_buf_len);
+  regs->rsi = input_buf_len;
+
+#undef g2h
+#undef h2g
+
+}
+
+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;
+
+}
+