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comparison netinstall/autoload.c @ 448:3078fd1074e8 r21-2-39

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Import from CVS: tag r21-2-39
author cvs
date Mon, 13 Aug 2007 11:38:25 +0200
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447:4fc5f13f3bd3 448:3078fd1074e8
1 /*
2 * Copyright (c) 2000, Red Hat, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * A copy of the GNU General Public License can be found at
10 * http://www.gnu.org/
11 *
12 * Written by DJ Delorie <dj@cygnus.com>
13 *
14 */
15
16 #include "win32.h"
17
18 typedef struct {
19 char *name;
20 HINSTANCE handle;
21 } DllInfo;
22
23 #define DLL(n) static DllInfo n ## _info __asm__ (#n "_info") = { #n, 0}
24
25 #define Auto(dll, func, size) \
26 __asm__ ("\t.data"); \
27 __asm__ ("\t.global\t_" #func "@" #size); \
28 __asm__ ("_" #func "@" #size ":"); \
29 __asm__ ("\tcall\tautoload_common"); \
30 __asm__ ("\t.long\t" #dll "_info"); \
31 __asm__ ("\t.ascii\t\"" #func "\\0\"")
32
33 DLL (wininet);
34
35 Auto (wininet, InternetAttemptConnect, 4);
36 Auto (wininet, InternetCloseHandle, 4);
37 Auto (wininet, InternetGetLastResponseInfoA, 12);
38 Auto (wininet, InternetOpenA, 20);
39 Auto (wininet, InternetOpenUrlA, 24);
40 Auto (wininet, InternetReadFile, 16);
41 Auto (wininet, InternetSetOptionA, 16);
42 Auto (wininet, InternetQueryOptionA, 16);
43 Auto (wininet, HttpQueryInfoA, 20);
44 Auto (wininet, HttpSendRequestA, 20);
45
46 typedef struct {
47 DllInfo *dll;
48 char name[100];
49 } AutoEntry;
50
51 static void autoload_common () __asm__ ("autoload_common");
52
53 static void
54 autoload_common (int x)
55 {
56 int fp, rel;
57 unsigned char *proc;
58 HINSTANCE h;
59 AutoEntry *a;
60
61 a = *(AutoEntry **)(&x - 1);
62 if (a->dll->handle == 0)
63 {
64 h = LoadLibrary (a->dll->name);
65 a->dll->handle = h;
66 }
67 fp = (int) GetProcAddress (a->dll->handle, a->name);
68 proc = ((unsigned char *)a) - 5;
69 rel = fp - (int)(a); /* now it's a relative call */
70 *proc++ = 0xe9; /* jump near 32-bit relative */
71 *proc++ = rel;
72 *proc++ = rel>>8;
73 *proc++ = rel>>16;
74 *proc++ = rel>>24;
75
76 *(int *)(&x-1) = (int)proc-5;
77 }