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/* ld.c - linker for Introl format (6809 C) object files 6809/8086/80386 */
/* Copyright (C) 1994 Bruce Evans */
#include "const.h"
#include "byteord.h"
#include "type.h"
#include "globvar.h"
#ifdef STDC_HEADERS_MISSING
extern int errno;
char *strcat P((char *dest, const char *src));
unsigned long strtoul P((const char *s, char **endptr, int base));
#else
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#endif
#ifdef POSIX_HEADERS_MISSING
#define R_OK 0
int access P((const char *path, int amode));
#else
#include <unistd.h>
#endif
#define MAX_LIBS (NR_STDLIBS + 5)
#ifdef MC6809
#define NR_STDLIBS 1
#else
#define NR_STDLIBS 0
#endif
PUBLIC long text_base_address; /* XXX */
PUBLIC int doscomfile = 0;
PRIVATE bool_t flag[128];
PRIVATE char *libs[MAX_LIBS] = {
#ifdef MC6809
"/usr/local/lib/m09/",
#endif
0
};
PRIVATE int lastlib = NR_STDLIBS;
FORWARD char *buildname P((char *pre, char *mid, char *suf));
FORWARD char *expandlib P((char *fn));
PRIVATE char *buildname(pre, mid, suf)
char *pre;
char *mid;
char *suf;
{
char *name;
name = ourmalloc(strlen(pre) + strlen(mid) + strlen(suf) + 1);
strcpy(name, pre);
strcat(name, mid);
strcat(name, suf);
return name;
}
PRIVATE char *expandlib(fn)
char *fn;
{
char *path;
int i;
for (i = lastlib - 1; i >= 0; --i)
{
path = ourmalloc(strlen(libs[i]) + strlen(fn) + 1);
strcpy(path, libs[i]);
strcat(path, fn);
if (access(path, R_OK) == 0)
return path;
ourfree(path);
}
return NUL_PTR;
}
PUBLIC int main(argc, argv)
int argc;
char **argv;
{
register char *arg;
int argn;
static char crtprefix[] = "crt";
static char crtsuffix[] = ".o";
char *infilename;
static char libprefix[] = "lib";
static char libsuffix[] = ".a";
char *outfilename;
char *tfn;
ioinit(argv[0]);
objinit();
syminit();
typeconv_init(BIG_ENDIAN, LONG_BIG_ENDIAN);
#ifndef MC6809
flag['z'] = flag['3'] = sizeof(char *) >= 4;
#endif
outfilename = NUL_PTR;
for (argn = 1; argn < argc; ++argn)
{
arg = argv[argn];
if (*arg != '-')
readsyms(arg, flag['t']);
else
switch (arg[1])
{
case '0': /* use 16-bit libraries */
case '3': /* use 32-bit libraries */
case 'M': /* print symbols linked */
case 'i': /* separate I & D output */
case 'm': /* print modules linked */
#ifdef BSD_A_OUT
case 'r': /* relocatable output */
#endif
case 's': /* strip symbols */
case 't': /* trace modules linked */
case 'z': /* unmapped zero page */
if (arg[2] == 0)
flag[(int) arg[1]] = TRUE;
else if (arg[2] == '-' && arg[3] == 0)
flag[(int) arg[1]] = FALSE;
else
usage();
if (arg[1] == '0') /* flag 0 is negative logic flag 3 */
flag['3'] = !flag['0'];
break;
case 'd': /* Make DOS com file */
flag['3'] = FALSE;
flag['z'] = FALSE;
flag['0'] = TRUE;
flag['s'] = TRUE;
flag['d'] = TRUE;
text_base_address = 0x100;
break;
case 'C': /* startfile name */
tfn = buildname(crtprefix, arg + 2, crtsuffix);
if ((infilename = expandlib(tfn)) == NUL_PTR)
fatalerror(tfn); /* XXX - need to describe failure */
readsyms(infilename, flag['t']);
break;
case 'L': /* library path */
if (lastlib < MAX_LIBS)
libs[lastlib++] = arg + 2;
else
fatalerror("too many library paths");
break;
case 'O': /* library file name */
if ((infilename = expandlib(arg + 2)) == NUL_PTR)
fatalerror(arg); /* XXX */
readsyms(infilename, flag['t']);
break;
case 'T': /* text base address */
if (arg[2] != 0 || ++argn >= argc)
usage();
errno = 0;
text_base_address = strtoul(argv[argn], (char **) NUL_PTR, 16);
if (errno != 0)
use_error("invalid text address");
break;
case 'l': /* library name */
tfn = buildname(libprefix, arg + 2, libsuffix);
if ((infilename = expandlib(tfn)) == NUL_PTR)
fatalerror(tfn); /* XXX */
readsyms(infilename, flag['t']);
break;
case 'o': /* output file name */
if (arg[2] != 0 || ++argn >= argc || outfilename != NUL_PTR)
usage();
outfilename = argv[argn];
break;
default:
usage();
}
}
doscomfile = flag['d'];
linksyms(flag['r']);
if (outfilename == NUL_PTR)
outfilename = "a.out";
writebin(outfilename, flag['i'], flag['3'], flag['s'],
flag['z'] & flag['3']);
if (flag['m'])
dumpmods();
if (flag['M'])
dumpsyms();
flusherr();
return errcount ? 1 : 0;
}
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