1 /*****************************************************************************/
5 /* Object file handling for the ld65 linker */
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 /*****************************************************************************/
39 #include <sys/types.h> /* EMX needs this */
60 /*****************************************************************************/
62 /*****************************************************************************/
66 static unsigned GetModule (const char* Name)
67 /* Get a module name index from the file name */
69 /* Make a module name from the file name */
70 const char* Module = FindName (Name);
72 Error ("Cannot make module name from `%s'", Name);
74 return GetStringId (Module);
79 static void ObjReadHeader (FILE* Obj, ObjHeader* H, const char* Name)
80 /* Read the header of the object file checking the signature */
82 H->Version = Read16 (Obj);
83 if (H->Version != OBJ_VERSION) {
84 Error ("Object file `%s' has wrong version, expected %08X, got %08X",
85 Name, OBJ_VERSION, H->Version);
87 H->Flags = Read16 (Obj);
88 H->OptionOffs = Read32 (Obj);
89 H->OptionSize = Read32 (Obj);
90 H->FileOffs = Read32 (Obj);
91 H->FileSize = Read32 (Obj);
92 H->SegOffs = Read32 (Obj);
93 H->SegSize = Read32 (Obj);
94 H->ImportOffs = Read32 (Obj);
95 H->ImportSize = Read32 (Obj);
96 H->ExportOffs = Read32 (Obj);
97 H->ExportSize = Read32 (Obj);
98 H->DbgSymOffs = Read32 (Obj);
99 H->DbgSymSize = Read32 (Obj);
100 H->LineInfoOffs = Read32 (Obj);
101 H->LineInfoSize = Read32 (Obj);
102 H->StrPoolOffs = Read32 (Obj);
103 H->StrPoolSize = Read32 (Obj);
108 void ObjReadFiles (FILE* F, ObjData* O)
109 /* Read the files list from a file at the current position */
113 O->FileCount = ReadVar (F);
114 O->Files = xmalloc (O->FileCount * sizeof (O->Files[0]));
115 for (I = 0; I < O->FileCount; ++I) {
116 O->Files[I] = ReadFileInfo (F, O);
122 void ObjReadImports (FILE* F, ObjData* O)
123 /* Read the imports from a file at the current position */
127 O->ImportCount = ReadVar (F);
128 O->Imports = xmalloc (O->ImportCount * sizeof (O->Imports[0]));
129 for (I = 0; I < O->ImportCount; ++I) {
130 O->Imports [I] = ReadImport (F, O);
131 InsertImport (O->Imports [I]);
137 void ObjReadExports (FILE* F, ObjData* O)
138 /* Read the exports from a file at the current position */
142 O->ExportCount = ReadVar (F);
143 O->Exports = xmalloc (O->ExportCount * sizeof (O->Exports[0]));
144 for (I = 0; I < O->ExportCount; ++I) {
145 O->Exports [I] = ReadExport (F, O);
146 InsertExport (O->Exports [I]);
152 void ObjReadDbgSyms (FILE* F, ObjData* O)
153 /* Read the debug symbols from a file at the current position */
157 O->DbgSymCount = ReadVar (F);
158 O->DbgSyms = xmalloc (O->DbgSymCount * sizeof (O->DbgSyms[0]));
159 for (I = 0; I < O->DbgSymCount; ++I) {
160 O->DbgSyms [I] = ReadDbgSym (F, O);
166 void ObjReadLineInfos (FILE* F, ObjData* O)
167 /* Read the line infos from a file at the current position */
171 O->LineInfoCount = ReadVar (F);
172 O->LineInfos = xmalloc (O->LineInfoCount * sizeof (O->LineInfos[0]));
173 for (I = 0; I < O->LineInfoCount; ++I) {
174 O->LineInfos[I] = ReadLineInfo (F, O);
180 void ObjReadStrPool (FILE* F, ObjData* O)
181 /* Read the string pool from a file at the current position */
185 O->StringCount = ReadVar (F);
186 O->Strings = xmalloc (O->StringCount * sizeof (O->Strings[0]));
187 for (I = 0; I < O->StringCount; ++I) {
188 O->Strings[I] = ReadStr (F);
194 void ObjReadSections (FILE* F, ObjData* O)
195 /* Read the section data from a file at the current position */
199 O->SectionCount = ReadVar (F);
200 O->Sections = xmalloc (O->SectionCount * sizeof (O->Sections[0]));
201 for (I = 0; I < O->SectionCount; ++I) {
202 O->Sections [I] = ReadSection (F, O);
208 void ObjAdd (FILE* Obj, const char* Name)
209 /* Add an object file to the module list */
211 /* Create a new structure for the object file data */
212 ObjData* O = NewObjData ();
214 /* The magic was already read and checked, so set it in the header */
215 O->Header.Magic = OBJ_MAGIC;
217 /* Read and check the header */
218 ObjReadHeader (Obj, &O->Header, Name);
220 /* Initialize the object module data structure */
221 O->Name = GetModule (Name);
223 /* Read the string pool from the object file */
224 fseek (Obj, O->Header.StrPoolOffs, SEEK_SET);
225 ObjReadStrPool (Obj, O);
227 /* Read the files list from the object file */
228 fseek (Obj, O->Header.FileOffs, SEEK_SET);
229 ObjReadFiles (Obj, O);
231 /* Read the imports list from the object file */
232 fseek (Obj, O->Header.ImportOffs, SEEK_SET);
233 ObjReadImports (Obj, O);
235 /* Read the object file exports and insert them into the exports list */
236 fseek (Obj, O->Header.ExportOffs, SEEK_SET);
237 ObjReadExports (Obj, O);
239 /* Read the object debug symbols from the object file */
240 fseek (Obj, O->Header.DbgSymOffs, SEEK_SET);
241 ObjReadDbgSyms (Obj, O);
243 /* Read the line infos from the object file */
244 fseek (Obj, O->Header.LineInfoOffs, SEEK_SET);
245 ObjReadLineInfos (Obj, O);
247 /* Read the segment list from the object file. This must be last, since
248 * the expressions stored in the code may reference segments or imported
251 fseek (Obj, O->Header.SegOffs, SEEK_SET);
252 ObjReadSections (Obj, O);
254 /* Mark this object file as needed */
257 /* Done, close the file (we read it only, so no error check) */
260 /* All references to strings are now resolved, so we can delete the module
265 /* Insert the object into the list of all used object files */