1 /*****************************************************************************/
5 /* Object file handling for the ar65 archiver */
9 /* (C) 1998-2001 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
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);
116 void ObjWriteHeader (FILE* Obj, ObjHeader* H)
117 /* Write the header of the object file */
119 Write32 (Obj, H->Magic);
120 Write16 (Obj, H->Version);
121 Write16 (Obj, H->Flags);
122 Write32 (Obj, H->OptionOffs);
123 Write32 (Obj, H->OptionSize);
124 Write32 (Obj, H->FileOffs);
125 Write32 (Obj, H->FileSize);
126 Write32 (Obj, H->SegOffs);
127 Write32 (Obj, H->SegSize);
128 Write32 (Obj, H->ImportOffs);
129 Write32 (Obj, H->ImportSize);
130 Write32 (Obj, H->ExportOffs);
131 Write32 (Obj, H->ExportSize);
132 Write32 (Obj, H->DbgSymOffs);
133 Write32 (Obj, H->DbgSymSize);
134 Write32 (Obj, H->LineInfoOffs);
135 Write32 (Obj, H->LineInfoSize);
140 void ObjAdd (const char* Name)
141 /* Add an object file to the library */
148 /* Open the object file */
149 FILE* Obj = fopen (Name, "rb");
151 Error ("Could not open `%s': %s", Name, strerror (errno));
154 /* Get the modification time of the object file */
155 if (fstat (fileno (Obj), &StatBuf) != 0) {
156 Error ("Cannot stat object file `%s': %s", Name, strerror (errno));
159 /* Read and check the header */
160 ObjReadHeader (Obj, &H, Name);
162 /* Make a module name from the file name */
163 Module = GetModule (Name);
165 /* Check if we already have a module with this name */
166 O = FindObjData (Module);
168 /* Not found, create a new entry */
171 /* Found - check the file modification times of the internal copy
172 * and the external one.
174 if (difftime ((time_t)O->MTime, StatBuf.st_mtime) > 0.0) {
175 Warning ("Replacing module `%s' by older version", O->Name);
179 /* Initialize the object module data structure */
180 O->Name = xstrdup (Module);
181 O->Flags = OBJ_HAVEDATA;
182 O->MTime = StatBuf.st_mtime;
183 O->ImportSize = H.ImportSize;
184 O->Imports = xmalloc (O->ImportSize);
185 O->ExportSize = H.ExportSize;
186 O->Exports = xmalloc (O->ExportSize);
188 /* Read imports and exports */
189 fseek (Obj, H.ImportOffs, SEEK_SET);
190 ReadData (Obj, O->Imports, O->ImportSize);
191 fseek (Obj, H.ExportOffs, SEEK_SET);
192 ReadData (Obj, O->Exports, O->ExportSize);
194 /* Skip the object file header */
195 O->Start = ftell (NewLib);
196 fseek (NewLib, OBJ_HDR_SIZE, SEEK_CUR);
198 /* Copy the remaining sections */
199 fseek (Obj, H.DbgSymOffs, SEEK_SET);
200 H.DbgSymOffs = LibCopyTo (Obj, H.DbgSymSize) - O->Start;
201 fseek (Obj, H.OptionOffs, SEEK_SET);
202 H.OptionOffs = LibCopyTo (Obj, H.OptionSize) - O->Start;
203 fseek (Obj, H.SegOffs, SEEK_SET);
204 H.SegOffs = LibCopyTo (Obj, H.SegSize) - O->Start;
205 fseek (Obj, H.FileOffs, SEEK_SET);
206 H.FileOffs = LibCopyTo (Obj, H.FileSize) - O->Start;
207 fseek (Obj, H.LineInfoOffs, SEEK_SET);
208 H.LineInfoOffs = LibCopyTo (Obj, H.LineInfoSize) - O->Start;
210 /* Calculate the amount of data written */
211 O->Size = ftell (NewLib) - O->Start;
213 /* Clear the remaining header fields */
214 H.ImportOffs = H.ImportSize = 0;
215 H.ExportOffs = H.ExportSize = 0;
217 /* Seek back and write the updated header */
218 fseek (NewLib, O->Start, SEEK_SET);
219 ObjWriteHeader (NewLib, &H);
221 /* Now seek again to end of file */
222 fseek (NewLib, 0, SEEK_END);
224 /* Done, close the file (we read it only, so no error check) */
230 void ObjExtract (const char* Name)
231 /* Extract a module from the library */
233 unsigned long ImportStart;
234 unsigned long ExportStart;
240 /* Make a module name from the file name */
241 const char* Module = GetModule (Name);
243 /* Try to find the module in the library */
244 ObjData* O = FindObjData (Module);
246 /* Bail out if the module does not exist */
248 Error ("Module `%s' not found in library", Module);
251 /* Open the output file */
252 Obj = fopen (Name, "w+b");
254 Error ("Cannot open target file `%s': %s", Name, strerror (errno));
257 /* Copy the first four segments including the header to the new file */
258 LibCopyFrom (O->Start, O->Size, Obj);
260 /* Write imports and exports */
261 ImportStart = ftell (Obj);
262 WriteData (Obj, O->Imports, O->ImportSize);
263 ExportStart = ftell (Obj);
264 WriteData (Obj, O->Exports, O->ExportSize);
266 /* Seek back and read the header */
267 fseek (Obj, 0, SEEK_SET);
268 ObjReadHeader (Obj, &H, Name);
270 /* Update the header fields */
271 H.ImportOffs = ImportStart;
272 H.ImportSize = O->ImportSize;
273 H.ExportOffs = ExportStart;
274 H.ExportSize = O->ExportSize;
276 /* Write the changed header */
277 fseek (Obj, 0, SEEK_SET);
278 ObjWriteHeader (Obj, &H);
281 if (fclose (Obj) != 0) {
282 Error ("Problem closing object file `%s': %s", Name, strerror (errno));
285 /* Set access and modification time */
287 U.modtime = O->MTime;
288 if (utime (Name, &U) != 0) {
289 Error ("Cannot set mod time on `%s': %s", Name, strerror (errno));