mirror of
https://github.com/QuasarApp/openssl.git
synced 2025-05-18 20:39:42 +00:00
c144b4edda
This reverts commit 75f90688fb2dec0f897cad8be8b92be725c5016b. TerminateProcess is asynchronous, so the code as written in the above commit is not correct (and doesn't even compile at the moment). It is also probably not needed in the speed case. Reverting in order to figure out the correct solution. Reviewed-by: Rich Salz <rsalz@openssl.org>
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
#if (defined(_WIN64) || defined(_WIN32_WCE)) && !defined(UNICODE)
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# define UNICODE
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#endif
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#if defined(UNICODE) && !defined(_UNICODE)
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# define _UNICODE
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#endif
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#if defined(_UNICODE) && !defined(UNICODE)
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# define UNICODE
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#endif
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#include <windows.h>
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#include <tchar.h>
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#include <stdio.h>
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#include "uplink.h"
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void OPENSSL_showfatal(const char *, ...);
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static TCHAR msg[128];
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static void unimplemented(void)
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{
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OPENSSL_showfatal(sizeof(TCHAR) == sizeof(char) ? "%s\n" : "%S\n", msg);
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ExitProcess(1);
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}
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void OPENSSL_Uplink(volatile void **table, int index)
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{
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static HMODULE volatile apphandle = NULL;
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static void **volatile applinktable = NULL;
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int len;
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void (*func) (void) = unimplemented;
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HANDLE h;
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void **p;
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/*
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* Note that the below code is not MT-safe in respect to msg buffer, but
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* what's the worst thing that can happen? Error message might be
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* misleading or corrupted. As error condition is fatal and should never
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* be risen, I accept the risk...
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*/
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/*
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* One can argue that I should have used InterlockedExchangePointer or
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* something to update static variables and table[]. Well, store
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* instructions are as atomic as they can get and assigned values are
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* effectively constant... So that volatile qualifier should be
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* sufficient [it prohibits compiler to reorder memory access
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* instructions].
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*/
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do {
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len = _sntprintf(msg, sizeof(msg) / sizeof(TCHAR),
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_T("OPENSSL_Uplink(%p,%02X): "), table, index);
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_tcscpy(msg + len, _T("unimplemented function"));
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if ((h = apphandle) == NULL) {
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if ((h = GetModuleHandle(NULL)) == NULL) {
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apphandle = (HMODULE) - 1;
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_tcscpy(msg + len, _T("no host application"));
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break;
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}
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apphandle = h;
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}
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if ((h = apphandle) == (HMODULE) - 1) /* revalidate */
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break;
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if (applinktable == NULL) {
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void **(*applink) ();
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applink = (void **(*)())GetProcAddress(h, "OPENSSL_Applink");
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if (applink == NULL) {
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apphandle = (HMODULE) - 1;
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_tcscpy(msg + len, _T("no OPENSSL_Applink"));
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break;
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}
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p = (*applink) ();
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if (p == NULL) {
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apphandle = (HMODULE) - 1;
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_tcscpy(msg + len, _T("no ApplinkTable"));
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break;
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}
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applinktable = p;
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} else
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p = applinktable;
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if (index > (int)p[0])
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break;
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if (p[index])
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func = p[index];
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} while (0);
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table[index] = func;
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}
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#if defined(_MSC_VER) && defined(_M_IX86) && !defined(OPENSSL_NO_INLINE_ASM)
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# define LAZY(i) \
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__declspec(naked) static void lazy##i (void) { \
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_asm push i \
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_asm push OFFSET OPENSSL_UplinkTable \
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_asm call OPENSSL_Uplink \
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_asm add esp,8 \
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_asm jmp OPENSSL_UplinkTable+4*i }
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# if APPLINK_MAX>25
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# error "Add more stubs..."
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# endif
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/* make some in advance... */
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LAZY(1) LAZY(2) LAZY(3) LAZY(4) LAZY(5)
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LAZY(6) LAZY(7) LAZY(8) LAZY(9) LAZY(10)
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LAZY(11) LAZY(12) LAZY(13) LAZY(14) LAZY(15)
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LAZY(16) LAZY(17) LAZY(18) LAZY(19) LAZY(20)
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LAZY(21) LAZY(22) LAZY(23) LAZY(24) LAZY(25)
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void *OPENSSL_UplinkTable[] = {
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(void *)APPLINK_MAX,
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lazy1, lazy2, lazy3, lazy4, lazy5,
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lazy6, lazy7, lazy8, lazy9, lazy10,
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lazy11, lazy12, lazy13, lazy14, lazy15,
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lazy16, lazy17, lazy18, lazy19, lazy20,
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lazy21, lazy22, lazy23, lazy24, lazy25,
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};
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#endif
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#ifdef SELFTEST
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main()
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{
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UP_fprintf(UP_stdout, "hello, world!\n");
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}
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#endif
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