1 /*****************************************************************************/
5 /* Object file handling for the ar65 archiver */
9 /* (C) 1998-2003 Ullrich von Bassewitz */
10 /* Römerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
38 #if defined(__WATCOMC__) || defined(_MSC_VER) || defined(__MINGW32__)
39 /* The Windows compilers have the file in the wrong directory */
40 # include <sys/utime.h>
42 # include <sys/types.h> /* FreeBSD needs this */
60 /*****************************************************************************/
62 /*****************************************************************************/
66 static const char* GetModule (const char* Name)
67 /* Get a module name from the file name */
69 /* Make a module name from the file name */
70 const char* Module = Name + strlen (Name);
71 while (Module > Name) {
73 if (*Module == '/' || *Module == '\\') {
79 Error ("Cannot make module name from `%s'", Name);
86 void ObjReadHeader (FILE* Obj, ObjHeader* H, const char* Name)
87 /* Read the header of the object file checking the signature */
89 H->Magic = Read32 (Obj);
90 if (H->Magic != OBJ_MAGIC) {
91 Error ("`%s' is not an object file", Name);
93 H->Version = Read16 (Obj);
94 if (H->Version != OBJ_VERSION) {
95 Error ("Object file `%s' has wrong version", Name);
97 H->Flags = Read16 (Obj);
98 H->OptionOffs = Read32 (Obj);
99 H->OptionSize = Read32 (Obj);
100 H->FileOffs = Read32 (Obj);
101 H->FileSize = Read32 (Obj);
102 H->SegOffs = Read32 (Obj);
103 H->SegSize = Read32 (Obj);
104 H->ImportOffs = Read32 (Obj);
105 H->ImportSize = Read32 (Obj);
106 H->ExportOffs = Read32 (Obj);
107 H->ExportSize = Read32 (Obj);
108 H->DbgSymOffs = Read32 (Obj);
109 H->DbgSymSize = Read32 (Obj);
110 H->LineInfoOffs = Read32 (Obj);
111 H->LineInfoSize = Read32 (Obj);
112 H->StrPoolOffs = Read32 (Obj);
113 H->StrPoolSize = Read32 (Obj);
118 void ObjWriteHeader (FILE* Obj, ObjHeader* H)
119 /* Write the header of the object file */
121 Write32 (Obj, H->Magic);
122 Write16 (Obj, H->Version);
123 Write16 (Obj, H->Flags);
124 Write32 (Obj, H->OptionOffs);
125 Write32 (Obj, H->OptionSize);
126 Write32 (Obj, H->FileOffs);
127 Write32 (Obj, H->FileSize);
128 Write32 (Obj, H->SegOffs);
129 Write32 (Obj, H->SegSize);
130 Write32 (Obj, H->ImportOffs);
131 Write32 (Obj, H->ImportSize);
132 Write32 (Obj, H->ExportOffs);
133 Write32 (Obj, H->ExportSize);
134 Write32 (Obj, H->DbgSymOffs);
135 Write32 (Obj, H->DbgSymSize);
136 Write32 (Obj, H->LineInfoOffs);
137 Write32 (Obj, H->LineInfoSize);
138 Write32 (Obj, H->StrPoolOffs);
139 Write32 (Obj, H->StrPoolSize);
144 void ObjAdd (const char* Name)
145 /* Add an object file to the library */
153 /* Open the object file */
154 FILE* Obj = fopen (Name, "rb");
156 Error ("Could not open `%s': %s", Name, strerror (errno));
159 /* Get the modification time of the object file */
160 if (fstat (fileno (Obj), &StatBuf) != 0) {
161 Error ("Cannot stat object file `%s': %s", Name, strerror (errno));
164 /* Read and check the header */
165 ObjReadHeader (Obj, &H, Name);
167 /* Make a module name from the file name */
168 Module = GetModule (Name);
170 /* Check if we already have a module with this name */
171 O = FindObjData (Module);
173 /* Not found, create a new entry */
176 /* Found - check the file modification times of the internal copy
177 * and the external one.
179 if (difftime ((time_t)O->MTime, StatBuf.st_mtime) > 0.0) {
180 Warning ("Replacing module `%s' by older version", O->Name);
184 /* Initialize the object module data structure */
185 O->Name = xstrdup (Module);
186 O->Flags = OBJ_HAVEDATA;
187 O->MTime = StatBuf.st_mtime;
188 O->ImportSize = H.ImportSize;
189 O->Imports = xmalloc (O->ImportSize);
190 O->ExportSize = H.ExportSize;
191 O->Exports = xmalloc (O->ExportSize);
193 /* Read imports and exports */
194 fseek (Obj, H.ImportOffs, SEEK_SET);
195 ReadData (Obj, O->Imports, O->ImportSize);
196 fseek (Obj, H.ExportOffs, SEEK_SET);
197 ReadData (Obj, O->Exports, O->ExportSize);
199 /* Read the string pool */
200 fseek (Obj, H.StrPoolOffs, SEEK_SET);
201 O->StringCount = ReadVar (Obj);
202 O->Strings = xmalloc (O->StringCount * sizeof (char*));
203 for (I = 0; I < O->StringCount; ++I) {
204 O->Strings[I] = ReadStr (Obj);
207 /* Skip the object file header */
208 O->Start = ftell (NewLib);
209 fseek (NewLib, OBJ_HDR_SIZE, SEEK_CUR);
211 /* Copy the remaining sections */
212 fseek (Obj, H.DbgSymOffs, SEEK_SET);
213 H.DbgSymOffs = LibCopyTo (Obj, H.DbgSymSize) - O->Start;
214 fseek (Obj, H.OptionOffs, SEEK_SET);
215 H.OptionOffs = LibCopyTo (Obj, H.OptionSize) - O->Start;
216 fseek (Obj, H.SegOffs, SEEK_SET);
217 H.SegOffs = LibCopyTo (Obj, H.SegSize) - O->Start;
218 fseek (Obj, H.FileOffs, SEEK_SET);
219 H.FileOffs = LibCopyTo (Obj, H.FileSize) - O->Start;
220 fseek (Obj, H.LineInfoOffs, SEEK_SET);
221 H.LineInfoOffs = LibCopyTo (Obj, H.LineInfoSize) - O->Start;
223 /* Calculate the amount of data written */
224 O->Size = ftell (NewLib) - O->Start;
226 /* Clear the remaining header fields */
227 H.ImportOffs = H.ImportSize = 0;
228 H.ExportOffs = H.ExportSize = 0;
229 H.StrPoolOffs = H.StrPoolSize = 0;
231 /* Seek back and write the updated header */
232 fseek (NewLib, O->Start, SEEK_SET);
233 ObjWriteHeader (NewLib, &H);
235 /* Now seek again to end of file */
236 fseek (NewLib, 0, SEEK_END);
238 /* Done, close the file (we read it only, so no error check) */
244 void ObjExtract (const char* Name)
245 /* Extract a module from the library */
247 unsigned long ImportStart;
248 unsigned long ExportStart;
249 unsigned long StrPoolStart;
250 unsigned long StrPoolSize;
256 /* Make a module name from the file name */
257 const char* Module = GetModule (Name);
259 /* Try to find the module in the library */
260 ObjData* O = FindObjData (Module);
262 /* Bail out if the module does not exist */
264 Error ("Module `%s' not found in library", Module);
267 /* Open the output file */
268 Obj = fopen (Name, "w+b");
270 Error ("Cannot open target file `%s': %s", Name, strerror (errno));
273 /* Copy the first four segments including the header to the new file */
274 LibCopyFrom (O->Start, O->Size, Obj);
276 /* Write imports and exports */
277 ImportStart = ftell (Obj);
278 WriteData (Obj, O->Imports, O->ImportSize);
279 ExportStart = ftell (Obj);
280 WriteData (Obj, O->Exports, O->ExportSize);
282 /* Write the string pool */
283 StrPoolStart = ftell (Obj);
284 WriteVar (Obj, O->StringCount);
285 for (I = 0; I < O->StringCount; ++I) {
286 WriteStr (Obj, O->Strings[I]);
288 StrPoolSize = ftell (Obj) - StrPoolStart;
290 /* Seek back and read the header */
291 fseek (Obj, 0, SEEK_SET);
292 ObjReadHeader (Obj, &H, Name);
294 /* Update the header fields */
295 H.ImportOffs = ImportStart;
296 H.ImportSize = O->ImportSize;
297 H.ExportOffs = ExportStart;
298 H.ExportSize = O->ExportSize;
299 H.StrPoolOffs = StrPoolStart;
300 H.StrPoolSize = StrPoolSize;
302 /* Write the changed header */
303 fseek (Obj, 0, SEEK_SET);
304 ObjWriteHeader (Obj, &H);
307 if (fclose (Obj) != 0) {
308 Error ("Problem closing object file `%s': %s", Name, strerror (errno));
311 /* Set access and modification time */
313 U.modtime = O->MTime;
314 if (utime (Name, &U) != 0) {
315 Error ("Cannot set mod time on `%s': %s", Name, strerror (errno));