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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/ms/uplink.c
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Checked in the following released items:
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Diffstat (limited to 'openssl/ms/uplink.c')
-rw-r--r--openssl/ms/uplink.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/openssl/ms/uplink.c b/openssl/ms/uplink.c
new file mode 100644
index 000000000..7b7da08d4
--- /dev/null
+++ b/openssl/ms/uplink.c
@@ -0,0 +1,116 @@
+#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 = _stprintf (msg,_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) && !defined(OPENSSL_NO_INLINE_ASM)
+#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