1 /*****************************************************************************/
5 /* Object file writing routines for the ca65 macroassembler */
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 /*****************************************************************************/
52 /*****************************************************************************/
54 /*****************************************************************************/
61 /* Default extension */
64 /* Header structure */
65 static ObjHeader Header = {
66 OBJ_MAGIC, /* 32: Magic number */
67 OBJ_VERSION, /* 16: Version number */
69 0, /* 32: Offset to option table */
70 0, /* 32: Size of options */
71 0, /* 32: Offset to file table */
72 0, /* 32: Size of files */
73 0, /* 32: Offset to segment table */
74 0, /* 32: Size of segment table */
75 0, /* 32: Offset to import list */
76 0, /* 32: Size of import list */
77 0, /* 32: Offset to export list */
78 0, /* 32: Size of export list */
79 0, /* 32: Offset to list of debug symbols */
80 0, /* 32: Size of debug symbols */
81 0, /* 32: Offset to list of line infos */
82 0, /* 32: Size of line infos */
83 0, /* 32: Offset to string pool */
84 0 /* 32: Size of string pool */
89 /*****************************************************************************/
90 /* Internally used functions */
91 /*****************************************************************************/
95 static void ObjWriteError (void)
96 /* Called on a write error. Will try to close and remove the file, then
97 * print a fatal error.
100 /* Remember the error */
103 /* Force a close of the file, ignoring errors */
106 /* Try to remove the file, also ignoring errors */
109 /* Now abort with a fatal error */
110 Fatal (FAT_CANNOT_WRITE_OUTPUT, OutFile, strerror (Error));
115 static void ObjWriteHeader (void)
116 /* Write the object file header to the current file position */
118 ObjWrite32 (Header.Magic);
119 ObjWrite16 (Header.Version);
120 ObjWrite16 (Header.Flags);
121 ObjWrite32 (Header.OptionOffs);
122 ObjWrite32 (Header.OptionSize);
123 ObjWrite32 (Header.FileOffs);
124 ObjWrite32 (Header.FileSize);
125 ObjWrite32 (Header.SegOffs);
126 ObjWrite32 (Header.SegSize);
127 ObjWrite32 (Header.ImportOffs);
128 ObjWrite32 (Header.ImportSize);
129 ObjWrite32 (Header.ExportOffs);
130 ObjWrite32 (Header.ExportSize);
131 ObjWrite32 (Header.DbgSymOffs);
132 ObjWrite32 (Header.DbgSymSize);
133 ObjWrite32 (Header.LineInfoOffs);
134 ObjWrite32 (Header.LineInfoSize);
135 ObjWrite32 (Header.StrPoolOffs);
136 ObjWrite32 (Header.StrPoolSize);
141 /*****************************************************************************/
143 /*****************************************************************************/
148 /* Open the object file for writing, write a dummy header */
150 /* Do we have a name for the output file? */
152 /* We don't have an output name explicitly given, construct one from
153 * the name of the input file.
155 OutFile = MakeFilename (InFile, OBJ_EXT);
158 /* Create the output file */
159 F = fopen (OutFile, "w+b");
161 Fatal (FAT_CANNOT_OPEN_OUTPUT, OutFile, strerror (errno));
164 /* Write a dummy header */
171 /* Write an update header and close the object file. */
173 /* Go back to the beginning */
174 if (fseek (F, 0, SEEK_SET) != 0) {
178 /* If we have debug infos, set the flag in the header */
180 Header.Flags |= OBJ_FLAGS_DBGINFO;
183 /* Write the updated header */
187 if (fclose (F) != 0) {
194 void ObjWrite8 (unsigned V)
195 /* Write an 8 bit value to the file */
197 if (putc (V, F) == EOF) {
204 void ObjWrite16 (unsigned V)
205 /* Write a 16 bit value to the file */
213 void ObjWrite24 (unsigned long V)
214 /* Write a 24 bit value to the file */
223 void ObjWrite32 (unsigned long V)
224 /* Write a 32 bit value to the file */
234 void ObjWriteVar (unsigned long V)
235 /* Write a variable sized value to the file in special encoding */
237 /* We will write the value to the file in 7 bit chunks. If the 8th bit
238 * is clear, we're done, if it is set, another chunk follows. This will
239 * allow us to encode smaller values with less bytes, at the expense of
240 * needing 5 bytes if a 32 bit value is written to file.
243 unsigned char C = (V & 0x7F);
254 void ObjWriteStr (const char* S)
255 /* Write a string to the object file */
257 unsigned Len = strlen (S);
259 /* Write the string with the length preceeded (this is easier for
260 * the reading routine than the C format since the length is known in
264 ObjWriteData (S, Len);
269 void ObjWriteData (const void* Data, unsigned Size)
270 /* Write literal data to the file */
272 if (fwrite (Data, 1, Size, F) != Size) {
279 void ObjWritePos (const FilePos* Pos)
280 /* Write a file position to the object file */
282 /* Write the data entries */
283 ObjWriteVar (Pos->Line);
284 ObjWriteVar (Pos->Col);
285 if (Pos->Name == 0) {
286 /* Position is outside file scope, use the main file instead */
289 ObjWriteVar (Pos->Name - 1);
295 void ObjStartOptions (void)
296 /* Mark the start of the option section */
298 Header.OptionOffs = ftell (F);
303 void ObjEndOptions (void)
304 /* Mark the end of the option section */
306 Header.OptionSize = ftell (F) - Header.OptionOffs;
311 void ObjStartFiles (void)
312 /* Mark the start of the files section */
314 Header.FileOffs = ftell (F);
319 void ObjEndFiles (void)
320 /* Mark the end of the files section */
322 Header.FileSize = ftell (F) - Header.FileOffs;
327 void ObjStartSegments (void)
328 /* Mark the start of the segment section */
330 Header.SegOffs = ftell (F);
335 void ObjEndSegments (void)
336 /* Mark the end of the segment section */
338 Header.SegSize = ftell (F) - Header.SegOffs;
343 void ObjStartImports (void)
344 /* Mark the start of the import section */
346 Header.ImportOffs = ftell (F);
351 void ObjEndImports (void)
352 /* Mark the end of the import section */
354 Header.ImportSize = ftell (F) - Header.ImportOffs;
359 void ObjStartExports (void)
360 /* Mark the start of the export section */
362 Header.ExportOffs = ftell (F);
367 void ObjEndExports (void)
368 /* Mark the end of the export section */
370 Header.ExportSize = ftell (F) - Header.ExportOffs;
375 void ObjStartDbgSyms (void)
376 /* Mark the start of the debug symbol section */
378 Header.DbgSymOffs = ftell (F);
383 void ObjEndDbgSyms (void)
384 /* Mark the end of the debug symbol section */
386 Header.DbgSymSize = ftell (F) - Header.DbgSymOffs;
391 void ObjStartLineInfos (void)
392 /* Mark the start of the line info section */
394 Header.LineInfoOffs = ftell (F);
399 void ObjEndLineInfos (void)
400 /* Mark the end of the line info section */
402 Header.LineInfoSize = ftell (F) - Header.LineInfoOffs;
407 void ObjStartStrPool (void)
408 /* Mark the start of the string pool section */
410 Header.StrPoolOffs = ftell (F);
415 void ObjEndStrPool (void)
416 /* Mark the end of the string pool section */
418 Header.StrPoolSize = ftell (F) - Header.StrPoolOffs;