From a02d84a11cb28bc620bf24bda322e14701ad726f Mon Sep 17 00:00:00 2001
From: begasus <begasus@gmail.com>
Date: Mon, 5 Apr 2021 11:56:04 +0000
Subject: [PATCH] Fix undeclared SYS_write on Haiku

---
 instrumentation/afl-compiler-rt.o.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/instrumentation/afl-compiler-rt.o.c b/instrumentation/afl-compiler-rt.o.c
index fa53263c..9bb6114b 100644
--- a/instrumentation/afl-compiler-rt.o.c
+++ b/instrumentation/afl-compiler-rt.o.c
@@ -1740,7 +1740,11 @@ static int area_is_valid(void *ptr, size_t len) {
 
   if (unlikely(!ptr || __asan_region_is_poisoned(ptr, len))) { return 0; }
 
-  long r = syscall(SYS_write, __afl_dummy_fd[1], ptr, len);
+  #ifndef __HAIKU__
+    long r = syscall(SYS_write, __afl_dummy_fd[1], ptr, len);
+  #else
+    long r = _kern_write(__afl_dummy_fd[1], -1, ptr, len);
+  #endif // HAIKU
 
   if (r <= 0 || r > len) return 0;