qemu_mode/patches/bsd-elfload.diff

diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c
index 7cccf3eb..195875af 100644
--- a/bsd-user/elfload.c
+++ b/bsd-user/elfload.c
@@ -15,6 +15,8 @@
 #undef ELF_ARCH
 #endif
 
+extern abi_ulong afl_entry_point, afl_start_code, afl_end_code;
+
 /* from personality.h */
 
 /*
@@ -1522,6 +1524,8 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
     info->start_data = start_data;
     info->end_data = end_data;
     info->start_stack = bprm->p;
+    if (!afl_start_code) afl_start_code = vaddr;
+    if (!afl_end_code) afl_end_code = vaddr_ef;
 
     /* Calling set_brk effectively mmaps the pages that we need for the bss and break
        sections */
@@ -1549,6 +1553,20 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
     }
 
     info->entry = elf_entry;
+    if (!afl_entry_point) {
+      char *ptr;
+      if ((ptr = getenv("AFL_ENTRYPOINT")) != NULL) {
+        afl_entry_point = strtoul(ptr, NULL, 16);
+      } else {
+        afl_entry_point = info->entry;
+      }
+#ifdef TARGET_ARM
+      /* The least significant bit indicates Thumb mode. */
+      afl_entry_point = afl_entry_point & ~(target_ulong)1;
+#endif
+    }
+    if (getenv("AFL_DEBUG") != NULL)
+      fprintf(stderr, "AFL forkserver entrypoint: %p\n", (void*)afl_entry_point);
 
     return 0;
 }