xref: /reactos/boot/freeldr/freeldr/freeldr.c (revision cadfdc55)
1 /*
2  *  FreeLoader
3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
4  *
5  *  This program is free software; you can redistribute it and/or modify
6  *  it under the terms of the GNU General Public License as published by
7  *  the Free Software Foundation; either version 2 of the License, or
8  *  (at your option) any later version.
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *  GNU General Public License for more details.
14  *
15  *  You should have received a copy of the GNU General Public License along
16  *  with this program; if not, write to the Free Software Foundation, Inc.,
17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19 
20 /* INCLUDES *******************************************************************/
21 
22 #include <freeldr.h>
23 
24 #include <debug.h>
25 DBG_DEFAULT_CHANNEL(WARNING);
26 
27 /* GLOBALS ********************************************************************/
28 
29 #define TOSTRING_(X) #X
30 #define TOSTRING(X) TOSTRING_(X)
31 
32 const PCSTR FrLdrVersionString =
33 #if (FREELOADER_PATCH_VERSION == 0)
34     "FreeLoader v" TOSTRING(FREELOADER_MAJOR_VERSION) "." TOSTRING(FREELOADER_MINOR_VERSION);
35 #else
36     "FreeLoader v" TOSTRING(FREELOADER_MAJOR_VERSION) "." TOSTRING(FREELOADER_MINOR_VERSION) "." TOSTRING(FREELOADER_PATCH_VERSION);
37 #endif
38 
39 CCHAR FrLdrBootPath[MAX_PATH] = "";
40 
41 /* FUNCTIONS ******************************************************************/
42 
43 VOID __cdecl BootMain(IN PCCH CmdLine)
44 {
45     /* Load the default settings from the command-line */
46     LoadSettings(CmdLine);
47 
48     /* Debugger pre-initialization */
49     DebugInit(BootMgrInfo.DebugString);
50 
51     MachInit(CmdLine);
52 
53     TRACE("BootMain() called.\n");
54 
55 #ifndef UEFIBOOT
56     /* Check if the CPU is new enough */
57     FrLdrCheckCpuCompatibility(); // FIXME: Should be done inside MachInit!
58 #endif
59 
60     /* UI pre-initialization */
61     if (!UiInitialize(FALSE))
62     {
63         UiMessageBoxCritical("Unable to initialize UI.");
64         goto Quit;
65     }
66 
67     /* Initialize memory manager */
68     if (!MmInitializeMemoryManager())
69     {
70         UiMessageBoxCritical("Unable to initialize memory manager.");
71         goto Quit;
72     }
73 
74     /* Initialize I/O subsystem */
75     FsInit();
76 
77     RunLoader();
78 
79 Quit:
80     /* If we reach this point, something went wrong before, therefore reboot */
81     Reboot();
82 }
83 
84 // We need to emulate these, because the original ones don't work in freeldr
85 // These functions are here, because they need to be in the main compilation unit
86 // and cannot be in a library.
87 int __cdecl wctomb(char *mbchar, wchar_t wchar)
88 {
89     *mbchar = (char)wchar;
90     return 1;
91 }
92 
93 int __cdecl mbtowc(wchar_t *wchar, const char *mbchar, size_t count)
94 {
95     *wchar = (wchar_t)*mbchar;
96     return 1;
97 }
98 
99 // The wctype table is 144 KB, too much for poor freeldr
100 int __cdecl iswctype(wint_t wc, wctype_t wctypeFlags)
101 {
102     return _isctype((char)wc, wctypeFlags);
103 }
104 
105 #ifdef _MSC_VER
106 #pragma warning(disable:4164)
107 #pragma function(pow)
108 #pragma function(log)
109 #pragma function(log10)
110 #endif
111 
112 // Stubs to avoid pulling in data from CRT
113 double pow(double x, double y)
114 {
115     __debugbreak();
116     return 0.0;
117 }
118 
119 double log(double x)
120 {
121     __debugbreak();
122     return 0.0;
123 }
124 
125 double log10(double x)
126 {
127     __debugbreak();
128     return 0.0;
129 }
130