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annotate src/loadso/macos/SDL_loadso.c @ 1230:88c2d6aed428

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From Mike Frysinger and/or Gentoo: - libsdl-PIC-load-mmx-masks-from-stack.patch this one may be a little controversial ... the fix here is again that you cant reference the memory addresses like this to load into a mmx register, so the way to do it is to push two 32bit words onto the stack, load the 64bit value off of the stack into the mmx register, and then adjust the stack so that it's back to normal.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jan 2006 15:25:19 +0000
parents e9cf8c1b4590
children c9b51268668f
rev   line source
1173
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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29 /* System dependent library loading routines */
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30
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31 #if !SDL_INTERNAL_BUILDING_LOADSO
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32 #error Do not compile directly...compile src/SDL_loadso.c instead!
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33 #endif
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34
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35 #if !defined(macintosh)
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36 #error Compiling for the wrong platform?
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37 #endif
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38
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39 #include <stdio.h>
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40 #include <string.h>
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41 #define OLDP2C 1
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42 #include <Strings.h>
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43 #include <CodeFragments.h>
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44 #include <Errors.h>
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45
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46 #include "SDL_types.h"
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47 #include "SDL_error.h"
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48 #include "SDL_loadso.h"
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49
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50 void *SDL_LoadObject(const char *sofile)
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51 {
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52 void *handle = NULL;
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53 const char *loaderror = NULL;
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54 CFragConnectionID library_id;
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55 Ptr mainAddr;
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56 Str255 errName;
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57 OSErr error;
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58 char psofile[512];
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59
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60 strncpy(psofile, sofile, SDL_TABLESIZE(psofile));
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61 psofile[SDL_TABLESIZE(psofile)-1] = '\0';
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62 error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,
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63 kLoadCFrag, &library_id, &mainAddr, errName);
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64 switch (error) {
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65 case noErr:
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66 loaderror = NULL;
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67 break;
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68 case cfragNoLibraryErr:
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69 loaderror = "Library not found";
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70 break;
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71 case cfragUnresolvedErr:
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72 loaderror = "Unabled to resolve symbols";
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73 break;
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74 case cfragNoPrivateMemErr:
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75 case cfragNoClientMemErr:
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76 loaderror = "Out of memory";
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77 break;
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78 default:
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79 loaderror = "Unknown Code Fragment Manager error";
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80 break;
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81 }
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82 if ( loaderror == NULL ) {
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83 handle = (void *)(library_id);
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84 } else {
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85 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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86 }
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87 return(handle);
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88 }
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89
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90 void *SDL_LoadFunction(void *handle, const char *name)
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91 {
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92 void *symbol = NULL;
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93 const char *loaderror = NULL;
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94 CFragSymbolClass class;
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95 CFragConnectionID library_id = (CFragConnectionID)handle;
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96 char pname[512];
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97
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98 strncpy(pname, name, SDL_TABLESIZE(pname));
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99 pname[SDL_TABLESIZE(pname)-1] = '\0';
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100 if ( FindSymbol(library_id, C2PStr(pname),
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101 (char **)&symbol, &class) != noErr ) {
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102 loaderror = "Symbol not found";
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103 }
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104
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105 if ( symbol == NULL ) {
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106 SDL_SetError("Failed loading %s: %s", name, loaderror);
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107 }
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108 return(symbol);
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109 }
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110
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111 void SDL_UnloadObject(void *handle)
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112 {
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113 CFragConnectionID library_id;
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114 if ( handle != NULL ) {
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115 library_id = (CFragConnectionID)handle;
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116 CloseConnection(&library_id);
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117 }
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118 }
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119