From 79e622a839f8002b066066164154e6c6e029ed41 Mon Sep 17 00:00:00 2001
From: ptitSeb <sebastien.chev@gmail.com>
Date: Fri, 17 May 2024 10:02:26 +0200
Subject: [PATCH] Setup stack nicely for pthread_once (might help wine)

---
 src/libtools/threads.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/libtools/threads.c b/src/libtools/threads.c
index 3c07c0231..07a16e659 100755
--- a/src/libtools/threads.c
+++ b/src/libtools/threads.c
@@ -454,7 +454,14 @@ int EXPORT my_pthread_once(x86emu_t* emu, int* once, void* cb)
 	#endif
 	if(old)
 		return 0;
+    // make some room and align R_RSP before doing the call (maybe it would be simpler to just use Callback functions)
+    Push32(emu, R_EBP); // push rbp
+    R_EBP = R_ESP;      // mov rbp, rsp
+    R_ESP -= 0x200;
+    R_ESP &= ~63LL;
 	DynaCall(emu, (uintptr_t)cb);  // using DynaCall now, speedup wine 7.21 (proabbly other too) init
+	R_ESP = R_EBP;          // mov rsp, rbp
+	R_EBP = Pop32(emu);     // pop rbp
 	return 0;
 }
 EXPORT int my___pthread_once(x86emu_t* emu, void* once, void* cb) __attribute__((alias("my_pthread_once")));