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cc65/src/ld65/main.c

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/*****************************************************************************/
/* */
/* main.c */
/* */
/* Main program for the ld65 linker */
/* */
/* */
/* */
/* (C) 1998-2013, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
/* common */
#include "addrsize.h"
#include "chartype.h"
#include "cmdline.h"
#include "filetype.h"
#include "libdefs.h"
#include "objdefs.h"
#include "print.h"
#include "target.h"
#include "version.h"
#include "xmalloc.h"
/* ld65 */
#include "asserts.h"
#include "binfmt.h"
#include "condes.h"
#include "config.h"
#include "dbgfile.h"
#include "error.h"
#include "exports.h"
#include "fileio.h"
#include "filepath.h"
#include "global.h"
#include "library.h"
#include "mapfile.h"
#include "objfile.h"
#include "scanner.h"
#include "segments.h"
#include "spool.h"
#include "tpool.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
static unsigned ObjFiles = 0; /* Count of object files linked */
static unsigned LibFiles = 0; /* Count of library files linked */
/* struct InputFile.Type definitions */
#define INPUT_FILES_FILE 0 /* Entry is a file (unknown type) */
#define INPUT_FILES_FILE_OBJ 1 /* Entry is a object file */
#define INPUT_FILES_FILE_LIB 2 /* Entry is a library file */
#define INPUT_FILES_SGROUP 3 /* Entry is 'StartGroup' */
#define INPUT_FILES_EGROUP 4 /* Entry is 'EndGroup' */
#define MAX_INPUTFILES 256
/* Array of inputs (libraries and object files) */
static struct InputFile {
const char *FileName;
unsigned Type;
} *InputFiles;
static unsigned InputFilesCount = 0;
static const char *CmdlineCfgFile = NULL,
*CmdlineTarget = NULL;
/*****************************************************************************/
/* Code */
/*****************************************************************************/
static void Usage (void)
/* Print usage information and exit */
{
printf ("Usage: %s [options] module ...\n"
"Short options:\n"
" -(\t\t\tStart a library group\n"
" -)\t\t\tEnd a library group\n"
" -C name\t\tUse linker config file\n"
" -D sym=val\t\tDefine a symbol\n"
" -L path\t\tSpecify a library search path\n"
" -Ln name\t\tCreate a VICE label file\n"
" -S addr\t\tSet the default start address\n"
" -V\t\t\tPrint the linker version\n"
" -h\t\t\tHelp (this text)\n"
" -m name\t\tCreate a map file\n"
" -o name\t\tName the default output file\n"
" -t sys\t\tSet the target system\n"
" -u sym\t\tForce an import of symbol 'sym'\n"
" -v\t\t\tVerbose mode\n"
" -vm\t\t\tVerbose map file\n"
"\n"
"Long options:\n"
" --allow-multiple-definition\tAllow multiple definitions\n"
" --cfg-path path\t\tSpecify a config file search path\n"
" --config name\t\t\tUse linker config file\n"
" --dbgfile name\t\tGenerate debug information\n"
" --define sym=val\t\tDefine a symbol\n"
" --end-group\t\t\tEnd a library group\n"
" --force-import sym\t\tForce an import of symbol 'sym'\n"
" --help\t\t\tHelp (this text)\n"
" --large-alignment\t\tDon't warn about large alignments\n"
" --lib file\t\t\tLink this library\n"
" --lib-path path\t\tSpecify a library search path\n"
" --mapfile name\t\tCreate a map file\n"
" --module-id id\t\tSpecify a module id\n"
" --obj file\t\t\tLink this object file\n"
" --obj-path path\t\tSpecify an object file search path\n"
" --start-addr addr\t\tSet the default start address\n"
" --start-group\t\t\tStart a library group\n"
" --target sys\t\t\tSet the target system\n"
" --version\t\t\tPrint the linker version\n",
ProgName);
}
static unsigned long CvtNumber (const char* Arg, const char* Number)
/* Convert a number from a string. Allow '$' and '0x' prefixes for hex
** numbers.
*/
{
unsigned long Val;
int Converted;
/* Convert */
if (*Number == '$') {
++Number;
Converted = sscanf (Number, "%lx", &Val);
} else {
Converted = sscanf (Number, "%li", (long*)&Val);
}
/* Check if we do really have a number */
if (Converted != 1) {
Error ("Invalid number given in argument: %s\n", Arg);
}
/* Return the result */
return Val;
}
static void LinkFile (const char* Name, FILETYPE Type)
/* Handle one file */
{
char* PathName;
FILE* F;
unsigned long Magic;
/* If we don't know the file type, determine it from the extension */
if (Type == FILETYPE_UNKNOWN) {
Type = GetFileType (Name);
}
/* For known file types, search the file in the directory list */
switch (Type) {
case FILETYPE_LIB:
PathName = SearchFile (LibSearchPath, Name);
if (PathName == 0) {
PathName = SearchFile (LibDefaultPath, Name);
}
break;
case FILETYPE_OBJ:
PathName = SearchFile (ObjSearchPath, Name);
if (PathName == 0) {
PathName = SearchFile (ObjDefaultPath, Name);
}
break;
default:
PathName = xstrdup (Name); /* Use the name as is */
break;
}
/* We must have a valid name now */
if (PathName == 0) {
Error ("Input file '%s' not found", Name);
}
/* Try to open the file */
F = fopen (PathName, "rb");
if (F == 0) {
Error ("Cannot open '%s': %s", PathName, strerror (errno));
}
/* Read the magic word */
Magic = Read32 (F);
/* Check the magic for known file types. The handling is somewhat weird
** since we may have given a file with a ".lib" extension, which was
** searched and found in a directory for library files, but we now find
** out (by looking at the magic) that it's indeed an object file. We just
** ignore the problem and hope no one will notice...
*/
switch (Magic) {
case OBJ_MAGIC:
ObjAdd (F, PathName);
++ObjFiles;
break;
case LIB_MAGIC:
LibAdd (F, PathName);
++LibFiles;
break;
default:
fclose (F);
Error ("File '%s' has unknown type", PathName);
}
/* Free allocated memory. */
xfree (PathName);
}
static void DefineSymbol (const char* Def)
/* Define a symbol from the command line */
{
const char* P;
long Val;
StrBuf SymName = AUTO_STRBUF_INITIALIZER;
/* The symbol must start with a character or underline */
if (Def [0] != '_' && !IsAlpha (Def [0])) {
InvDef (Def);
}
P = Def;
/* Copy the symbol, checking the remainder */
while (IsAlNum (*P) || *P == '_') {
SB_AppendChar (&SymName, *P++);
}
SB_Terminate (&SymName);
/* Do we have a value given? */
if (*P != '=') {
InvDef (Def);
} else {
/* We have a value */
++P;
if (*P == '$') {
++P;
if (sscanf (P, "%lx", &Val) != 1) {
InvDef (Def);
}
} else {
if (sscanf (P, "%li", &Val) != 1) {
InvDef (Def);
}
}
}
/* Define the new symbol */
CreateConstExport (GetStringId (SB_GetConstBuf (&SymName)), Val);
}
static void OptCfgPath (const char* Opt attribute ((unused)), const char* Arg)
/* Specify a config file search path */
{
AddSearchPath (CfgSearchPath, Arg);
}
static void OptConfig (const char* Opt attribute ((unused)), const char* Arg)
/* Define the config file */
{
char* PathName;
if (CfgAvail ()) {
Error ("Cannot use -C/-t twice");
}
/* Search for the file */
PathName = SearchFile (CfgSearchPath, Arg);
if (PathName == 0) {
PathName = SearchFile (CfgDefaultPath, Arg);
}
if (PathName == 0) {
Error ("Cannot find config file '%s'", Arg);
}
/* Read the config */
CfgSetName (PathName);
CfgRead ();
}
static void OptDbgFile (const char* Opt attribute ((unused)), const char* Arg)
/* Give the name of the debug file */
{
DbgFileName = Arg;
}
static void OptDefine (const char* Opt attribute ((unused)), const char* Arg)
/* Define a symbol on the command line */
{
DefineSymbol (Arg);
}
static void OptEndGroup (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* End a library group */
{
LibEndGroup ();
}
static void OptForceImport (const char* Opt attribute ((unused)), const char* Arg)
/* Force an import of a symbol */
{
/* An optional address size may be specified */
const char* ColPos = strchr (Arg, ':');
if (ColPos == 0) {
/* Use default address size (which for now is always absolute
** addressing)
*/
InsertImport (GenImport (GetStringId (Arg), ADDR_SIZE_ABS));
} else {
char* A;
/* Get the address size and check it */
unsigned char AddrSize = AddrSizeFromStr (ColPos+1);
if (AddrSize == ADDR_SIZE_INVALID) {
Error ("Invalid address size '%s'", ColPos+1);
}
/* Create a copy of the argument */
A = xstrdup (Arg);
/* We need just the symbol */
A[ColPos - Arg] = '\0';
/* Generate the import */
InsertImport (GenImport (GetStringId (A), AddrSize));
/* Delete the copy of the argument */
xfree (A);
}
}
static void OptHelp (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Print usage information and exit */
{
Usage ();
exit (EXIT_SUCCESS);
}
static void OptLargeAlignment (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Don't warn about large alignments */
{
LargeAlignment = 1;
}
static void OptLib (const char* Opt attribute ((unused)), const char* Arg)
/* Link a library */
{
InputFiles[InputFilesCount].Type = INPUT_FILES_FILE_LIB;
InputFiles[InputFilesCount].FileName = Arg;
if (++InputFilesCount >= MAX_INPUTFILES)
Error ("Too many input files");
}
static void OptLibPath (const char* Opt attribute ((unused)), const char* Arg)
/* Specify a library file search path */
{
AddSearchPath (LibSearchPath, Arg);
}
static void OptMapFile (const char* Opt attribute ((unused)), const char* Arg)
/* Give the name of the map file */
{
if (MapFileName) {
Error ("Cannot use -m twice");
}
MapFileName = Arg;
}
static void OptModuleId (const char* Opt, const char* Arg)
/* Specify a module id */
{
unsigned long Id = CvtNumber (Opt, Arg);
if (Id > 0xFFFFUL) {
Error ("Range error in module id");
}
ModuleId = (unsigned) Id;
}
static void OptObj (const char* Opt attribute ((unused)), const char* Arg)
/* Link an object file */
{
InputFiles[InputFilesCount].Type = INPUT_FILES_FILE_OBJ;
InputFiles[InputFilesCount].FileName = Arg;
if (++InputFilesCount >= MAX_INPUTFILES)
Error ("Too many input files");
}
static void OptObjPath (const char* Opt attribute ((unused)), const char* Arg)
/* Specify an object file search path */
{
AddSearchPath (ObjSearchPath, Arg);
}
static void OptOutputName (const char* Opt attribute ((unused)), const char* Arg)
/* Give the name of the output file */
{
static int OutputNameSeen = 0;
if (OutputNameSeen) {
Error ("Cannot use -o twice");
}
OutputNameSeen = 1;
OutputName = Arg;
}
static void OptStartAddr (const char* Opt, const char* Arg)
/* Set the default start address */
{
if (HaveStartAddr) {
Error ("Cannot use -S twice");
}
StartAddr = CvtNumber (Opt, Arg);
HaveStartAddr = 1;
}
static void OptStartGroup (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Start a library group */
{
LibStartGroup ();
}
static void OptTarget (const char* Opt attribute ((unused)), const char* Arg)
/* Set the target system */
{
StrBuf FileName = STATIC_STRBUF_INITIALIZER;
char* PathName;
/* Map the target name to a target id */
Target = FindTarget (Arg);
if (Target == TGT_UNKNOWN) {
Error ("Invalid target name: '%s'", Arg);
}
/* Set the target binary format */
DefaultBinFmt = GetTargetProperties (Target)->BinFmt;
/* Build config file name from target name */
SB_CopyStr (&FileName, GetTargetName (Target));
SB_AppendStr (&FileName, ".cfg");
SB_Terminate (&FileName);
/* Search for the file */
PathName = SearchFile (CfgSearchPath, SB_GetBuf (&FileName));
if (PathName == 0) {
PathName = SearchFile (CfgDefaultPath, SB_GetBuf (&FileName));
}
if (PathName == 0) {
Error ("Cannot find config file '%s'", SB_GetBuf (&FileName));
}
/* Free file name memory */
SB_Done (&FileName);
/* Read the file */
CfgSetName (PathName);
CfgRead ();
}
static void OptVersion (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Print the assembler version */
{
fprintf (stderr, "%s V%s\n", ProgName, GetVersionAsString ());
exit(EXIT_SUCCESS);
}
static void OptWarningsAsErrors (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Generate an error if any warnings occur */
{
WarningsAsErrors = 1;
}
static void OptMultDef (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Set flag to allow multiple definitions of a global symbol */
{
AllowMultDef = 1;
}
static void CmdlOptStartGroup (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Remember 'start group' occurrence in input files array */
{
InputFiles[InputFilesCount].Type = INPUT_FILES_SGROUP;
InputFiles[InputFilesCount].FileName = Arg; /* Unused */
if (++InputFilesCount >= MAX_INPUTFILES)
Error ("Too many input files");
}
static void CmdlOptEndGroup (const char* Opt attribute ((unused)),
const char* Arg attribute ((unused)))
/* Remember 'end group' occurrence in input files array */
{
InputFiles[InputFilesCount].Type = INPUT_FILES_EGROUP;
InputFiles[InputFilesCount].FileName = Arg; /* Unused */
if (++InputFilesCount >= MAX_INPUTFILES)
Error ("Too many input files");
}
static void CmdlOptConfig (const char* Opt attribute ((unused)), const char* Arg)
/* Set 'config file' command line parameter */
{
if (CmdlineCfgFile || CmdlineTarget) {
Error ("Cannot use -C/-t twice");
}
CmdlineCfgFile = Arg;
}
static void CmdlOptTarget (const char* Opt attribute ((unused)), const char* Arg)
/* Set 'target' command line parameter */
{
if (CmdlineCfgFile || CmdlineTarget) {
Error ("Cannot use -C/-t twice");
}
CmdlineTarget = Arg;
}
static void ParseCommandLine(void)
{
/* Program long options */
static const LongOpt OptTab[] = {
{ "--allow-multiple-definition", 0, OptMultDef },
{ "--cfg-path", 1, OptCfgPath },
{ "--config", 1, CmdlOptConfig },
{ "--dbgfile", 1, OptDbgFile },
{ "--define", 1, OptDefine },
{ "--end-group", 0, CmdlOptEndGroup },
{ "--force-import", 1, OptForceImport },
{ "--help", 0, OptHelp },
{ "--large-alignment", 0, OptLargeAlignment },
{ "--lib", 1, OptLib },
{ "--lib-path", 1, OptLibPath },
{ "--mapfile", 1, OptMapFile },
{ "--module-id", 1, OptModuleId },
{ "--obj", 1, OptObj },
{ "--obj-path", 1, OptObjPath },
{ "--start-addr", 1, OptStartAddr },
{ "--start-group", 0, CmdlOptStartGroup },
{ "--target", 1, CmdlOptTarget },
{ "--version", 0, OptVersion },
{ "--warnings-as-errors", 0, OptWarningsAsErrors },
};
unsigned I;
unsigned LabelFileGiven = 0;
/* Allocate memory for input file array */
InputFiles = xmalloc (MAX_INPUTFILES * sizeof (struct InputFile));
/* Defer setting of config/target and input files until all options are parsed */
I = 1;
while (I < ArgCount) {
/* Get the argument */
const char* Arg = ArgVec[I];
/* Check for an option */
if (Arg [0] == '-') {
/* An option */
switch (Arg [1]) {
case '-':
LongOption (&I, OptTab, sizeof(OptTab)/sizeof(OptTab[0]));
break;
case '(':
CmdlOptStartGroup (Arg, 0);
break;
case ')':
CmdlOptEndGroup (Arg, 0);
break;
case 'h':
case '?':
OptHelp (Arg, 0);
break;
case 'm':
OptMapFile (Arg, GetArg (&I, 2));
break;
case 'o':
OptOutputName (NULL, GetArg (&I, 2));
break;
case 't':
CmdlOptTarget (Arg, GetArg (&I, 2));
break;
case 'u':
OptForceImport (Arg, GetArg (&I, 2));
break;
case 'v':
switch (Arg [2]) {
case 'm': VerboseMap = 1; break;
case '\0': ++Verbosity; break;
default: UnknownOption (Arg);
}
break;
case 'C':
CmdlOptConfig (Arg, GetArg (&I, 2));
break;
case 'D':
OptDefine (Arg, GetArg (&I, 2));
break;
case 'L':
switch (Arg [2]) {
case 'n':
/* ## This one is obsolete and will go */
if (LabelFileGiven) {
Error ("Cannot use -Ln twice");
}
LabelFileGiven = 1;
LabelFileName = GetArg (&I, 3);
break;
default:
OptLibPath (Arg, GetArg (&I, 2));
break;
}
break;
case 'S':
OptStartAddr (Arg, GetArg (&I, 2));
break;
case 'V':
OptVersion (Arg, 0);
break;
default:
UnknownOption (Arg);
break;
}
} else {
/* A filename */
InputFiles[InputFilesCount].Type = INPUT_FILES_FILE;
InputFiles[InputFilesCount].FileName = Arg;
if (++InputFilesCount >= MAX_INPUTFILES)
Error ("Too many input files");
}
/* Next argument */
++I;
}
if (CmdlineTarget) {
OptTarget (NULL, CmdlineTarget);
} else if (CmdlineCfgFile) {
OptConfig (NULL, CmdlineCfgFile);
}
/* Process input files */
for (I = 0; I < InputFilesCount; ++I) {
switch (InputFiles[I].Type) {
case INPUT_FILES_FILE:
LinkFile (InputFiles[I].FileName, FILETYPE_UNKNOWN);
break;
case INPUT_FILES_FILE_LIB:
LinkFile (InputFiles[I].FileName, FILETYPE_LIB);
break;
case INPUT_FILES_FILE_OBJ:
LinkFile (InputFiles[I].FileName, FILETYPE_OBJ);
break;
case INPUT_FILES_SGROUP:
OptStartGroup (NULL, 0);
break;
case INPUT_FILES_EGROUP:
OptEndGroup (NULL, 0);
break;
default:
abort ();
}
}
/* Free memory used for input file array */
xfree (InputFiles);
}
int main (int argc, char* argv [])
/* Linker main program */
{
unsigned MemoryAreaOverflows;
/* Initialize the cmdline module */
InitCmdLine (&argc, &argv, "ld65");
/* Initialize the input file search paths */
InitSearchPaths ();
/* Initialize the string pool */
InitStrPool ();
/* Initialize the type pool */
InitTypePool ();
/* Parse the command line */
ParseCommandLine ();
/* Check if we had any object files */
if (ObjFiles == 0) {
Error ("No object files to link");
}
/* Check if we have a valid configuration */
if (!CfgAvail ()) {
Error ("Memory configuration missing");
}
/* Check if we have open library groups */
LibCheckGroup ();
/* Create the condes tables if requested */
ConDesCreate ();
/* Process data from the config file. Assign start addresses for the
** segments, define linker symbols. The function will return the number
** of memory area overflows (zero on success).
*/
MemoryAreaOverflows = CfgProcess ();
/* Check module assertions */
CheckAssertions ();
/* Check for import/export mismatches */
CheckExports ();
/* If we had a memory area overflow before, we cannot generate the output
** file. However, we will generate a short map file if requested, since
** this will help the user to rearrange segments and fix the overflow.
*/
if (MemoryAreaOverflows) {
if (MapFileName) {
CreateMapFile (SHORT_MAPFILE);
}
Error ("Cannot generate most of the files due to memory area overflow%c",
(MemoryAreaOverflows > 1) ? 's' : ' ');
}
if (WarningCount > 0 && WarningsAsErrors) {
Error("Warnings as errors");
}
/* Create the output file */
CfgWriteTarget ();
/* Check for segments not written to the output file */
CheckSegments ();
/* If requested, create a map file and a label file for VICE */
if (MapFileName) {
CreateMapFile (LONG_MAPFILE);
}
if (LabelFileName) {
CreateLabelFile ();
}
if (DbgFileName) {
CreateDbgFile ();
}
/* Dump the data for debugging */
if (Verbosity > 1) {
SegDump ();
ConDesDump ();
}
/* Return an apropriate exit code */
return EXIT_SUCCESS;
}
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