From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/ms/uplink.c | 135 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 openssl-1.1.0h/ms/uplink.c

(limited to 'openssl-1.1.0h/ms/uplink.c')

diff --git a/openssl-1.1.0h/ms/uplink.c b/openssl-1.1.0h/ms/uplink.c
new file mode 100644
index 0000000..7f7abfb
--- /dev/null
+++ b/openssl-1.1.0h/ms/uplink.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#if (defined(_WIN64) || defined(_WIN32_WCE)) && !defined(UNICODE)
+# define UNICODE
+#endif
+#if defined(UNICODE) && !defined(_UNICODE)
+# define _UNICODE
+#endif
+#if defined(_UNICODE) && !defined(UNICODE)
+# define UNICODE
+#endif
+
+#include <windows.h>
+#include <tchar.h>
+#include <stdio.h>
+#include "uplink.h"
+void OPENSSL_showfatal(const char *, ...);
+
+static TCHAR msg[128];
+
+static void unimplemented(void)
+{
+    OPENSSL_showfatal(sizeof(TCHAR) == sizeof(char) ? "%s\n" : "%S\n", msg);
+    ExitProcess(1);
+}
+
+void OPENSSL_Uplink(volatile void **table, int index)
+{
+    static HMODULE volatile apphandle = NULL;
+    static void **volatile applinktable = NULL;
+    int len;
+    void (*func) (void) = unimplemented;
+    HANDLE h;
+    void **p;
+
+    /*
+     * Note that the below code is not MT-safe in respect to msg buffer, but
+     * what's the worst thing that can happen? Error message might be
+     * misleading or corrupted. As error condition is fatal and should never
+     * be risen, I accept the risk...
+     */
+    /*
+     * One can argue that I should have used InterlockedExchangePointer or
+     * something to update static variables and table[]. Well, store
+     * instructions are as atomic as they can get and assigned values are
+     * effectively constant... So that volatile qualifier should be
+     * sufficient [it prohibits compiler to reorder memory access
+     * instructions].
+     */
+    do {
+        len = _sntprintf(msg, sizeof(msg) / sizeof(TCHAR),
+                         _T("OPENSSL_Uplink(%p,%02X): "), table, index);
+        _tcscpy(msg + len, _T("unimplemented function"));
+
+        if ((h = apphandle) == NULL) {
+            if ((h = GetModuleHandle(NULL)) == NULL) {
+                apphandle = (HMODULE) - 1;
+                _tcscpy(msg + len, _T("no host application"));
+                break;
+            }
+            apphandle = h;
+        }
+        if ((h = apphandle) == (HMODULE) - 1) /* revalidate */
+            break;
+
+        if (applinktable == NULL) {
+            void **(*applink) ();
+
+            applink = (void **(*)())GetProcAddress(h, "OPENSSL_Applink");
+            if (applink == NULL) {
+                apphandle = (HMODULE) - 1;
+                _tcscpy(msg + len, _T("no OPENSSL_Applink"));
+                break;
+            }
+            p = (*applink) ();
+            if (p == NULL) {
+                apphandle = (HMODULE) - 1;
+                _tcscpy(msg + len, _T("no ApplinkTable"));
+                break;
+            }
+            applinktable = p;
+        } else
+            p = applinktable;
+
+        if (index > (int)p[0])
+            break;
+
+        if (p[index])
+            func = p[index];
+    } while (0);
+
+    table[index] = func;
+}
+
+#if defined(_MSC_VER) && defined(_M_IX86)
+# define LAZY(i)         \
+__declspec(naked) static void lazy##i (void) {  \
+        _asm    push i                          \
+        _asm    push OFFSET OPENSSL_UplinkTable \
+        _asm    call OPENSSL_Uplink             \
+        _asm    add  esp,8                      \
+        _asm    jmp  OPENSSL_UplinkTable+4*i    }
+
+# if APPLINK_MAX>25
+#  error "Add more stubs..."
+# endif
+/* make some in advance... */
+LAZY(1) LAZY(2) LAZY(3) LAZY(4) LAZY(5)
+    LAZY(6) LAZY(7) LAZY(8) LAZY(9) LAZY(10)
+    LAZY(11) LAZY(12) LAZY(13) LAZY(14) LAZY(15)
+    LAZY(16) LAZY(17) LAZY(18) LAZY(19) LAZY(20)
+    LAZY(21) LAZY(22) LAZY(23) LAZY(24) LAZY(25)
+void *OPENSSL_UplinkTable[] = {
+    (void *)APPLINK_MAX,
+    lazy1, lazy2, lazy3, lazy4, lazy5,
+    lazy6, lazy7, lazy8, lazy9, lazy10,
+    lazy11, lazy12, lazy13, lazy14, lazy15,
+    lazy16, lazy17, lazy18, lazy19, lazy20,
+    lazy21, lazy22, lazy23, lazy24, lazy25,
+};
+#endif
+
+#ifdef SELFTEST
+main()
+{
+    UP_fprintf(UP_stdout, "hello, world!\n");
+}
+#endif
-- 
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