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annotate src/SDL_loadso.c @ 1166:da33b7e6d181

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Date: Tue, 1 Nov 2005 20:25:10 +0100 From: Dirk Mueller Subject: [PATCH] build SDL with nonexecutable stack libSDL is by default marked with an executable stack, which it doesn't actually need. the reason for this is that there are assembler files in the source tree not properly annotated with the "noexec stack" section. As such the linker does a safe-fallback and marks the whole lib as "requires executable stack". the patch below removes this by adding annotations. As far as I can see it shouldn't break anything.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 01 Nov 2005 23:19:59 +0000
parents 51a8702d8ecd
children e9cf8c1b4590
rev   line source
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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 #include <stdio.h>
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32 #if defined(USE_DLOPEN)
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33 # include <dlfcn.h>
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34 #elif defined(WIN32) || defined(_WIN32_WCE)
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35 # include <windows.h>
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36 #elif defined(__BEOS__)
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37 # include <be/kernel/image.h>
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38 #elif defined(macintosh)
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39 # include <string.h>
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40 #define OLDP2C 1
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41 # include <Strings.h>
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42 # include <CodeFragments.h>
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43 # include <Errors.h>
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44 #elif defined(__MINT__) && defined(ENABLE_LDG)
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45 # include <gem.h>
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46 # include <ldg.h>
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47 #else
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48 /*#error Unsupported dynamic link environment*/
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49 #endif /* system type */
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50
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51 #include "SDL_types.h"
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52 #include "SDL_error.h"
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53 #include "SDL_loadso.h"
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54
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55 void *SDL_LoadObject(const char *sofile)
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56 {
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57 void *handle = NULL;
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58 const char *loaderror = "SDL_LoadObject() not implemented";
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59 #if defined(USE_DLOPEN)
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60 /* * */
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61 handle = dlopen(sofile, RTLD_NOW);
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62 loaderror = (char *)dlerror();
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63 #elif defined(_WIN32_WCE)
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64 /* * */
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65 char errbuf[512];
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66
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67 wchar_t *errbuf_t = malloc(512 * sizeof(wchar_t));
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68 wchar_t *sofile_t = malloc((MAX_PATH+1) * sizeof(wchar_t));
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69
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70 MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, sofile, -1, sofile_t, MAX_PATH);
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71 handle = (void *)LoadLibrary(sofile_t);
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72
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73 /* Generate an error message if all loads failed */
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74 if ( handle == NULL ) {
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75 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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76 FORMAT_MESSAGE_FROM_SYSTEM),
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77 NULL, GetLastError(),
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78 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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79 errbuf_t, SDL_TABLESIZE(errbuf), NULL);
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80 WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
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81 loaderror = errbuf;
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82 }
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83
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84 free(sofile_t);
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85 free(errbuf_t);
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86
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87 #elif defined(WIN32)
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88 /* * */
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89 char errbuf[512];
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90
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91 handle = (void *)LoadLibrary(sofile);
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92
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93 /* Generate an error message if all loads failed */
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94 if ( handle == NULL ) {
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95 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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96 FORMAT_MESSAGE_FROM_SYSTEM),
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97 NULL, GetLastError(),
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98 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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99 errbuf, SDL_TABLESIZE(errbuf), NULL);
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100 loaderror = errbuf;
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101 }
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102 #elif defined(__BEOS__)
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103 /* * */
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104 image_id library_id;
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105
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106 library_id = load_add_on(sofile);
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107 if ( library_id == B_ERROR ) {
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108 loaderror = "BeOS error";
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109 } else {
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110 handle = (void *)(library_id);
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111 }
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112 #elif defined(macintosh)
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113 /* * */
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114 CFragConnectionID library_id;
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115 Ptr mainAddr;
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116 Str255 errName;
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117 OSErr error;
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118 char psofile[512];
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119
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120 strncpy(psofile, sofile, SDL_TABLESIZE(psofile));
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121 psofile[SDL_TABLESIZE(psofile)-1] = '\0';
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122 error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,
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123 kLoadCFrag, &library_id, &mainAddr, errName);
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124 switch (error) {
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125 case noErr:
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126 loaderror = NULL;
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127 break;
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128 case cfragNoLibraryErr:
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129 loaderror = "Library not found";
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130 break;
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131 case cfragUnresolvedErr:
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diff changeset
132 loaderror = "Unabled to resolve symbols";
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parents:
diff changeset
133 break;
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parents:
diff changeset
134 case cfragNoPrivateMemErr:
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
135 case cfragNoClientMemErr:
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parents:
diff changeset
136 loaderror = "Out of memory";
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parents:
diff changeset
137 break;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
138 default:
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parents:
diff changeset
139 loaderror = "Unknown Code Fragment Manager error";
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
140 break;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
141 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
142 if ( loaderror == NULL ) {
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parents:
diff changeset
143 handle = (void *)(library_id);
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parents:
diff changeset
144 }
651
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parents: 336
diff changeset
145 #elif defined(__MINT__) && defined(ENABLE_LDG)
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
146 /* * */
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
147 handle = (void *)ldg_open((char *)sofile, ldg_global);
294
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parents:
diff changeset
148 #endif /* system type */
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parents:
diff changeset
149
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
150 if ( handle == NULL ) {
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parents:
diff changeset
151 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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parents:
diff changeset
152 }
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parents:
diff changeset
153 return(handle);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154 }
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
155
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
156 void *SDL_LoadFunction(void *handle, const char *name)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
157 {
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
158 void *symbol = NULL;
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
159 const char *loaderror = "SDL_LoadFunction not implemented";
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parents:
diff changeset
160 #if defined(USE_DLOPEN)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
161 /* * */
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
162 symbol = dlsym(handle, name);
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
163 if ( symbol == NULL ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
164 loaderror = (char *)dlerror();
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
165 }
1152
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
166 #elif defined(_WIN32_WCE)
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
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diff changeset
167 /* * */
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
168 char errbuf[512];
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
169 int length = strlen(name);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
170
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
171 wchar_t *name_t = malloc((length + 1) * sizeof(wchar_t));
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
172 wchar_t *errbuf_t = malloc(512 * sizeof(wchar_t));
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
173
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
174 MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, name_t, length);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
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parents: 1135
diff changeset
175
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
176 symbol = (void *)GetProcAddress((HMODULE)handle, name_t);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
177 if ( symbol == NULL ) {
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
178 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
179 FORMAT_MESSAGE_FROM_SYSTEM),
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
180 NULL, GetLastError(),
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
181 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
182 errbuf_t, SDL_TABLESIZE(errbuf), NULL);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
183 WideCharToMultiByte(CP_ACP, 0, errbuf_t, -1, errbuf, 511, NULL, NULL);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
184 loaderror = errbuf;
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
185 }
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
186
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
187 free(name_t);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
Ryan C. Gordon <icculus@icculus.org>
parents: 1135
diff changeset
188 free(errbuf_t);
51a8702d8ecd Updates to PocketPC (WinCE) support, thanks to Dmitry Yakimov at
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parents: 1135
diff changeset
189
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
190 #elif defined(WIN32)
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
191 /* * */
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
192 char errbuf[512];
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
193
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
194 symbol = (void *)GetProcAddress((HMODULE)handle, name);
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
195 if ( symbol == NULL ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
196 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
197 FORMAT_MESSAGE_FROM_SYSTEM),
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
198 NULL, GetLastError(),
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
199 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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parents:
diff changeset
200 errbuf, SDL_TABLESIZE(errbuf), NULL);
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parents:
diff changeset
201 loaderror = errbuf;
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
202 }
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
203 #elif defined(__BEOS__)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
204 /* * */
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
205 image_id library_id = (image_id)handle;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
206 if ( get_image_symbol(library_id,
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
207 name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
208 loaderror = "Symbol not found";
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
209 }
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
210 #elif defined(macintosh)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
211 /* * */
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
212 CFragSymbolClass class;
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
213 CFragConnectionID library_id = (CFragConnectionID)handle;
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
214 char pname[512];
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
215
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
216 strncpy(pname, name, SDL_TABLESIZE(pname));
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
217 pname[SDL_TABLESIZE(pname)-1] = '\0';
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
218 if ( FindSymbol(library_id, C2PStr(pname),
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
219 (char **)&symbol, &class) != noErr ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
220 loaderror = "Symbol not found";
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
221 }
651
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
222 #elif defined(__MINT__) && defined(ENABLE_LDG)
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
223 /* * */
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
224 symbol = (void *)ldg_find((char *)name, (LDG *)handle);
294
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
225 #endif /* system type */
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
226
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
227 if ( symbol == NULL ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
228 SDL_SetError("Failed loading %s: %s", name, loaderror);
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
229 }
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
230 return(symbol);
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231 }
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
232
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
233 void SDL_UnloadObject(void *handle)
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
234 {
336
745873ea091f BeOS compile fix for shared object loading code
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parents: 297
diff changeset
235 #if defined(__BEOS__)
745873ea091f BeOS compile fix for shared object loading code
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parents: 297
diff changeset
236 image_id library_id;
707
c67d4fb10a45 *** empty log message ***
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parents: 651
diff changeset
237 #elif defined(macintosh)
c67d4fb10a45 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 651
diff changeset
238 CFragConnectionID library_id;
336
745873ea091f BeOS compile fix for shared object loading code
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parents: 297
diff changeset
239 #endif
294
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
240 if ( handle == NULL ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 return;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243 #if defined(USE_DLOPEN)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
244 /* * */
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 dlclose(handle);
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
246 #elif defined(WIN32)
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 /* * */
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
248 FreeLibrary((HMODULE)handle);
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
249 #elif defined(__BEOS__)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
250 /* * */
336
745873ea091f BeOS compile fix for shared object loading code
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parents: 297
diff changeset
251 library_id = (image_id)handle;
294
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
252 unload_add_on(library_id);
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
253 #elif defined(macintosh)
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
254 /* * */
707
c67d4fb10a45 *** empty log message ***
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parents: 651
diff changeset
255 library_id = (CFragConnectionID)handle;
708
d0d50f2b044c Fixed building SDL_loadso.c on MacOS Classic
Sam Lantinga <slouken@libsdl.org>
parents: 707
diff changeset
256 CloseConnection(&library_id);
651
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
257 #elif defined(__MINT__) && defined(ENABLE_LDG)
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
258 /* * */
35ff0890ac4e pmandin: Added Atari LDG shared object loader
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parents: 336
diff changeset
259 ldg_close((LDG *)handle, ldg_global);
294
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
260 #endif /* system type */
d2d48e10f370 Added a new header file: SDL_loadso.h
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parents:
diff changeset
261 }