From 8019694e17b6e6b6d3f9cab91233deea7c39a301 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Mon, 13 Jan 2025 03:19:39 +0100
Subject: [PATCH] mingw: Add upstream RtlSecureZeroMemory implementation.

Closes #22475.
---
 .../mingw/crt/intrincs/RtlSecureZeroMemory.c    | 17 +++++++++++++++++
 src/mingw.zig                                   |  1 +
 2 files changed, 18 insertions(+)
 create mode 100644 lib/libc/mingw/crt/intrincs/RtlSecureZeroMemory.c

diff --git a/lib/libc/mingw/crt/intrincs/RtlSecureZeroMemory.c b/lib/libc/mingw/crt/intrincs/RtlSecureZeroMemory.c
new file mode 100644
index 0000000000000000000000000000000000000000..8255a1e238ab790ce62213283b1d2b0a0c2e04d5
--- /dev/null
+++ b/lib/libc/mingw/crt/intrincs/RtlSecureZeroMemory.c
@@ -0,0 +1,17 @@
+#define __CRT__NO_INLINE 1
+#include <windows.h>
+
+PVOID WINAPI RtlSecureZeroMemory(PVOID ptr,SIZE_T cnt)
+{
+  volatile char *vptr = (volatile char *)ptr;
+#ifdef __x86_64
+  __stosb ((PBYTE)((DWORD64)vptr),0,cnt);
+#else
+  while (cnt != 0)
+    {
+      *vptr++ = 0;
+      cnt--;
+    }
+#endif /* __x86_64 */
+  return ptr;
+}
diff --git a/src/mingw.zig b/src/mingw.zig
index 7725a91f5003f9cfd7f3254766b0cb22f30977eb..1e20d327701326820c650f88faa2a74b28414d25 100644
--- a/src/mingw.zig
+++ b/src/mingw.zig
@@ -487,6 +487,7 @@ const mingw32_generic_src = [_][]const u8{
     "crt" ++ path.sep_str ++ "cxa_atexit.c",
     "crt" ++ path.sep_str ++ "cxa_thread_atexit.c",
     "crt" ++ path.sep_str ++ "tls_atexit.c",
+    "crt" ++ path.sep_str ++ "intrincs" ++ path.sep_str ++ "RtlSecureZeroMemory.c",
     // mingwex
     "cfguard" ++ path.sep_str ++ "mingw_cfguard_support.c",
     "complex" ++ path.sep_str ++ "_cabs.c",
-- 
2.54.0