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 */
59 /*****************************************************************************/
61 /*****************************************************************************/
65 static const char* GetModule (const char* Name)
66 /* Get a module name from the file name */
68 /* Make a module name from the file name */
69 const char* Module = FindName (Name);
71 Error ("Cannot make module name from `%s'", Name);
78 static void ObjReadHeader (FILE* Obj, ObjHeader* H, const char* Name)
79 /* Read the header of the object file checking the signature */
81 H->Version = Read16 (Obj);
82 if (H->Version != OBJ_VERSION) {
83 Error ("Object file `%s' has wrong version, expected %08X, got %08X",
84 Name, OBJ_VERSION, H->Version);
86 H->Flags = Read16 (Obj);
87 H->OptionOffs = Read32 (Obj);
88 H->OptionSize = Read32 (Obj);
89 H->FileOffs = Read32 (Obj);
90 H->FileSize = Read32 (Obj);
91 H->SegOffs = Read32 (Obj);
92 H->SegSize = Read32 (Obj);
93 H->ImportOffs = Read32 (Obj);
94 H->ImportSize = Read32 (Obj);
95 H->ExportOffs = Read32 (Obj);
96 H->ExportSize = Read32 (Obj);
97 H->DbgSymOffs = Read32 (Obj);
98 H->DbgSymSize = Read32 (Obj);
99 H->LineInfoOffs = Read32 (Obj);
100 H->LineInfoSize = Read32 (Obj);
101 H->StrPoolOffs = Read32 (Obj);
102 H->StrPoolSize = Read32 (Obj);
107 void ObjReadFiles (FILE* F, ObjData* O)
108 /* Read the files list from a file at the current position */
112 O->FileCount = ReadVar (F);
113 O->Files = xmalloc (O->FileCount * sizeof (FileInfo*));
114 for (I = 0; I < O->FileCount; ++I) {
115 O->Files[I] = ReadFileInfo (F, O);
121 void ObjReadImports (FILE* F, ObjData* O)
122 /* Read the imports from a file at the current position */
126 O->ImportCount = ReadVar (F);
127 O->Imports = xmalloc (O->ImportCount * sizeof (Import*));
128 for (I = 0; I < O->ImportCount; ++I) {
129 O->Imports [I] = ReadImport (F, O);
130 InsertImport (O->Imports [I]);
136 void ObjReadExports (FILE* F, ObjData* O)
137 /* Read the exports from a file at the current position */
141 O->ExportCount = ReadVar (F);
142 O->Exports = xmalloc (O->ExportCount * sizeof (Export*));
143 for (I = 0; I < O->ExportCount; ++I) {
144 O->Exports [I] = ReadExport (F, O);
145 InsertExport (O->Exports [I]);
151 void ObjReadDbgSyms (FILE* F, ObjData* O)
152 /* Read the debug symbols from a file at the current position */
156 O->DbgSymCount = ReadVar (F);
157 O->DbgSyms = xmalloc (O->DbgSymCount * sizeof (DbgSym*));
158 for (I = 0; I < O->DbgSymCount; ++I) {
159 O->DbgSyms [I] = ReadDbgSym (F, O);
165 void ObjReadLineInfos (FILE* F, ObjData* O)
166 /* Read the line infos from a file at the current position */
170 O->LineInfoCount = ReadVar (F);
171 O->LineInfos = xmalloc (O->LineInfoCount * sizeof (LineInfo*));
172 for (I = 0; I < O->LineInfoCount; ++I) {
173 O->LineInfos[I] = ReadLineInfo (F, O);
179 void ObjReadStrPool (FILE* F, ObjData* O)
180 /* Read the string pool from a file at the current position */
183 O->StringCount = ReadVar (F);
184 O->Strings = xmalloc (O->StringCount * sizeof (char*));
185 for (I = 0; I < O->StringCount; ++I) {
186 O->Strings[I] = ReadStr (F);
192 void ObjReadSections (FILE* F, ObjData* O)
193 /* Read the section data from a file at the current position */
197 O->SectionCount = ReadVar (F);
198 O->Sections = xmalloc (O->SectionCount * sizeof (Section*));
199 for (I = 0; I < O->SectionCount; ++I) {
200 O->Sections [I] = ReadSection (F, O);
206 void ObjAdd (FILE* Obj, const char* Name)
207 /* Add an object file to the module list */
209 /* Create a new structure for the object file data */
210 ObjData* O = NewObjData ();
212 /* The magic was already read and checked, so set it in the header */
213 O->Header.Magic = OBJ_MAGIC;
215 /* Read and check the header */
216 ObjReadHeader (Obj, &O->Header, Name);
218 /* Initialize the object module data structure */
219 O->Name = xstrdup (GetModule (Name));
220 O->Flags = OBJ_HAVEDATA;
222 /* Read the string pool from the object file */
223 fseek (Obj, O->Header.StrPoolOffs, SEEK_SET);
224 ObjReadStrPool (Obj, O);
226 /* Read the files list from the object file */
227 fseek (Obj, O->Header.FileOffs, SEEK_SET);
228 ObjReadFiles (Obj, O);
230 /* Read the imports list from the object file */
231 fseek (Obj, O->Header.ImportOffs, SEEK_SET);
232 ObjReadImports (Obj, O);
234 /* Read the object file exports and insert them into the exports list */
235 fseek (Obj, O->Header.ExportOffs, SEEK_SET);
236 ObjReadExports (Obj, O);
238 /* Read the object debug symbols from the object file */
239 fseek (Obj, O->Header.DbgSymOffs, SEEK_SET);
240 ObjReadDbgSyms (Obj, O);
242 /* Read the line infos from the object file */
243 fseek (Obj, O->Header.LineInfoOffs, SEEK_SET);
244 ObjReadLineInfos (Obj, O);
246 /* Read the segment list from the object file. This must be last, since
247 * the expressions stored in the code may reference segments or imported
250 fseek (Obj, O->Header.SegOffs, SEEK_SET);
251 ObjReadSections (Obj, O);
253 /* Mark this object file as needed */
254 O->Flags |= OBJ_REF | OBJ_HAVEDATA;
256 /* Done, close the file (we read it only, so no error check) */
259 /* All references to strings are now resolved, so we can delete the module