minor fix to qemu_persistent_hook example

1 files changed, 4 insertions, 3 deletions

diff --git a/examples/qemu_persistent_hook/read_into_rdi.c b/examples/qemu_persistent_hook/read_into_rdi.c
index 43f1758f..6cf66ddf 100644
--- a/examples/qemu_persistent_hook/read_into_rdi.c
+++ b/examples/qemu_persistent_hook/read_into_rdi.c
@@ -38,12 +38,13 @@ enum {
 void afl_persistent_hook(uint64_t *regs, uint64_t 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 RAX.
+  // 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("reading into %p\n", regs[R_EDI]);
   size_t r = read(0, g2h(regs[R_EDI]), 1024);
-  regs[R_EAX] = r;
-  printf("readed %ld bytes\n", r);
+  regs[R_ESI] = r;
+  printf("read %ld bytes\n", r);
 
 }