mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 09:10:28 +00:00
151 lines
4.7 KiB
C
151 lines
4.7 KiB
C
![]() |
/*
|
||
|
* Copyright 2004-2021 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
*
|
||
|
* Licensed under the Apache License 2.0 (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);
|
||
|
TerminateProcess(GetCurrentProcess(), 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(__BORLANDC__)) && defined(_M_IX86)
|
||
|
# if defined(_MSC_VER)
|
||
|
# 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 }
|
||
|
# elif defined(__BORLANDC__) && defined(__clang__)
|
||
|
void *OPENSSL_UplinkTable[26]; /* C++Builder requires declaration before use */
|
||
|
# define LAZY(i) \
|
||
|
__declspec(naked) static void lazy##i (void) { \
|
||
|
__asm__("pushl $" #i "; " \
|
||
|
"pushl %0; " \
|
||
|
"call %P1; " \
|
||
|
"addl $8, %%esp; " \
|
||
|
"jmp *%2 " \
|
||
|
: /* no outputs */ \
|
||
|
: "i" (OPENSSL_UplinkTable), \
|
||
|
"i" (OPENSSL_Uplink), \
|
||
|
"m" (OPENSSL_UplinkTable[i])); }
|
||
|
# endif
|
||
|
|
||
|
# 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
|