From 1a90adfb5ea380820f8dd7d6331b2c2f787ea34d Mon Sep 17 00:00:00 2001
From: Jan Beich <jbeich@FreeBSD.org>
Date: Mon, 11 Oct 2021 22:26:52 +0000
Subject: [PATCH] vm_native: unbreak runtime on FreeBSD after 63104af8e9ee

shm_open() returns a file descriptor on success, not zero. As SHM_ANON
only exists on FreeBSD which also has memfd_create use the same code
as on Linux.

$ rpcs3
[...]
Verification failed (in file rpcs3/util/vm_native.cpp:478[:4], in function shm) (errno=2)
Segmentation fault
---
 rpcs3/util/vm_native.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rpcs3/util/vm_native.cpp b/rpcs3/util/vm_native.cpp
index e67c28c7c5..36c6d08944 100644
--- a/rpcs3/util/vm_native.cpp
+++ b/rpcs3/util/vm_native.cpp
@@ -474,8 +474,9 @@ namespace utils
 
 		if ((vm_overcommit & 3) == 0)
 		{
-#ifdef SHM_ANON
-			ensure(::shm_open(SHM_ANON, O_RDWR, S_IWUSR | S_IRUSR) == 0);
+#if defined(__FreeBSD__)
+			m_file = ::memfd_create_("", 0);
+			ensure(m_file >= 0);
 #else
 			const std::string name = "/rpcs3-mem2-" + std::to_string(reinterpret_cast<u64>(this));