diff options
Diffstat (limited to 'ld/ld.c')
| -rw-r--r-- | ld/ld.c | 187 |
1 files changed, 187 insertions, 0 deletions
@@ -0,0 +1,187 @@ +/* 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 +#undef NULL +#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 +#undef NULL +#include <unistd.h> +#endif + +#define MAX_LIBS (NR_STDLIBS + 5) +#define NR_STDLIBS 1 + +PUBLIC long text_base_address; /* XXX */ + +PRIVATE bool_t flag[128]; +PRIVATE char *libs[MAX_LIBS] = { +#ifdef MC6809 + "/usr/local/lib/m09/", +#else + /* One of the following values will be inserted at run time. */ +# define std386lib "/usr/local/lib/i386/" +# define std86lib "/usr/local/lib/i86/" +#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; + +#ifndef MC6809 + libs[0] = flag['3'] ? std386lib : std86lib; +#endif + + 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 NULL; +} + +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 = NULL; + 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 'C': /* startfile name */ + tfn = buildname(crtprefix, arg + 2, crtsuffix); + if ((infilename = expandlib(tfn)) == NULL) + 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)) == NULL) + 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 **) NULL, 16); + if (errno != 0) + use_error("invalid text address"); + break; + case 'l': /* library name */ + tfn = buildname(libprefix, arg + 2, libsuffix); + if ((infilename = expandlib(tfn)) == NULL) + fatalerror(tfn); /* XXX */ + readsyms(infilename, flag['t']); + break; + case 'o': /* output file name */ + if (arg[2] != 0 || ++argn >= argc || outfilename != NULL) + usage(); + outfilename = argv[argn]; + break; + default: + usage(); + } + } + linksyms(flag['r']); + if (outfilename == NULL) + 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; +} |