/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #define	EXTERN#include	"l.h"#include	<ar.h> #ifndef	DEFAULT#define	DEFAULT	'9'#endif #define	OANAME	229	/* old ANAME */  char	*noname		= "<none>";char	symname[]	= SYMDEF;char	thechar		= 'q';char	*thestring 	= "power"; char**	libdir;int	nlibdir	= 0;static	int	maxlibdir = 0; /* *	-H0 -T0x200000 -R0		is boot *	-H1 -T0x100000 -R4		is Be boot *	-H2 -T0x100020 -R0x100000	is plan9 format (was -T4128 -R4096) *	-H3 -T0x02010000 -D0x00001000	is raw *	-H4 -T0x1000200 -D0x20000e00 -R4	is aix xcoff executable *	-H5 -T0x80010000 -t0x10000	ELF, phys = 10000, vaddr = 0x8001... *					appropriate for blue gene (bg/l anyway) *	-H6 -T0xfffe2100 -R4		ELF, phys = vaddr = 0xfffe2100 *					appropriate for virtex 4 boot */ voidusage(void){	diag("usage: %s [-options] objects", argv0);	errorexit();} static intisobjfile(char *f){	int n, v;	Biobuf *b;	char buf1[5], buf2[SARMAG]; 	b = Bopen(f, OREAD);	if(b == nil)		return 0;	n = Bread(b, buf1, 5);	if(n == 5 && (buf1[2] == 1 && buf1[3] == '<' || buf1[3] == 1 && buf1[4] == '<'))		v = 1;	/* good enough for our purposes */	else{		Bseek(b, 0, 0);		n = Bread(b, buf2, SARMAG);		v = n == SARMAG && strncmp(buf2, ARMAG, SARMAG) == 0;	}	Bterm(b);	return v;} voidmain(int argc, char *argv[]){	int c;	char *a;	char name[LIBNAMELEN]; 	Binit(&bso, 1, OWRITE);	cout = -1;	listinit();	outfile = 0;	nerrors = 0;	curtext = P;	HEADTYPE = -1;	INITTEXT = -1;	INITTEXTP = -1;	INITDAT = -1;	INITRND = -1;	INITENTRY = 0; 	ARGBEGIN {	default:		c = ARGC();		if(c >= 0 && c < sizeof(debug))			debug[c]++;		break;	case 'o':		outfile = ARGF();		break;	case 'E':		a = ARGF();		if(a)			INITENTRY = a;		break;	case 'T':		a = ARGF();		if(a)			INITTEXT = atolwhex(a);		break;	case 'P':		a = ARGF();		if(a)			INITTEXTP = atolwhex(a);		break;	case 'D':		a = ARGF();		if(a)			INITDAT = atolwhex(a);		break;	case 'R':		a = ARGF();		if(a)			INITRND = atolwhex(a);		break;	case 'H':		a = ARGF();		if(a)			HEADTYPE = atolwhex(a);		break;	case 'L':		addlibpath(EARGF(usage()));		break;	case 'x':	/* produce export table */		doexp = 1;		if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))			readundefs(ARGF(), SEXPORT);		break;	case 'u':	/* produce dynamically loadable module */		dlm = 1;		if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))			readundefs(ARGF(), SIMPORT);		break;	} ARGEND	USED(argc);	if(*argv == 0)		usage();	if(!debug['9'] && !debug['U'] && !debug['B'])		debug[DEFAULT] = 1;	a = getenv("ccroot");	if(a != nil && *a != '\0') {		if(!fileexists(a)) {			diag("nonexistent $ccroot: %s", a);			errorexit();		}	}else		a = "";	snprint(name, sizeof(name), "%s/%s/lib", a, thestring);	addlibpath(name);	r0iszero = debug['0'] == 0;	if(HEADTYPE == -1) {		if(debug['U'])			HEADTYPE = 0;		if(debug['B'])			HEADTYPE = 1;		if(debug['9'])			HEADTYPE = 2;	}	switch(HEADTYPE) {	default:		diag("unknown -H option");		errorexit(); 	case 0:	/* boot */		HEADR = 32L;		if(INITTEXT == -1)			INITTEXT = 0x200000L;		if(INITDAT == -1)			INITDAT = 0;		if(INITRND == -1)			INITRND = 4096L;		break;	case 1:	/* Be boot format (PEF) */		HEADR = 208L;		if(INITTEXT == -1)			INITTEXT = 0x100000;		if(INITDAT == -1)			INITDAT = 0;		if(INITRND == -1)			INITRND = 4;		break;	case 2:	/* plan 9 */		HEADR = 32L;		if(INITTEXT == -1)			INITTEXT = 0x100020;		if(INITDAT == -1)			INITDAT = 0;		if(INITRND == -1)			INITRND = 0x100000;		break;	case 3:	/* raw */		HEADR = 0;		if(INITTEXT == -1)			INITTEXT = 4128;		if(INITDAT == -1) {			INITDAT = 0;			INITRND = 4;		}		if(INITRND == -1)			INITRND = 0;		break;	case 4:	/* aix unix xcoff executable */		HEADR = 20L+72L+3*40L;		if(INITTEXT == -1)			INITTEXT = 0x1000000L+HEADR;		if(INITDAT == -1)			INITDAT = 0x20000000;		if(INITRND == -1)			INITRND = 0;		break;	case 5:	/* elf executable */		HEADR = rnd(Ehdr32sz+3*Phdr32sz, 16);		if(INITTEXT == -1)			INITTEXT = 0x00400000L+HEADR;		if(INITDAT == -1)			INITDAT = 0x10000000;		if(INITRND == -1)			INITRND = 0;		break;	case 6:	/* elf for virtex 4 */		HEADR = rnd(Ehdr32sz+4*Phdr32sz, 16); /* extra phdr for JMP */		if(INITTEXT == -1)			INITTEXT = 0x00400000L+HEADR;		if(INITDAT == -1)			INITDAT = 0x10000000;		if(INITRND == -1)			INITRND = 0;		break;	}	if (INITTEXTP == -1)		INITTEXTP = INITTEXT;	if(INITDAT != 0 && INITRND != 0)		print("warning: -D0x%lux is ignored because of -R0x%lux\n",			INITDAT, INITRND);	if(debug['v'])		Bprint(&bso, "HEADER = -H0x%x -T0x%lux -D0x%lux -R0x%lux\n",			HEADTYPE, INITTEXT, INITDAT, INITRND);	Bflush(&bso);	zprg.as = AGOK;	zprg.reg = NREG;	zprg.from.name = D_NONE;	zprg.from.type = D_NONE;	zprg.from.reg = NREG;	zprg.from3 = zprg.from;	zprg.to = zprg.from;	buildop();	histgen = 0;	textp = P;	datap = P;	pc = 0;	dtype = 4;	if(outfile == 0)		outfile = "q.out";	cout = create(outfile, 1, 0775);	if(cout < 0) {		diag("cannot create %s: %r", outfile);		errorexit();	}	nuxiinit();	version = 0;	cbp = buf.cbuf;	cbc = sizeof(buf.cbuf);	firstp = prg();	lastp = firstp; 	if(INITENTRY == 0) {		INITENTRY = "_main";		if(debug['p'])			INITENTRY = "_mainp";		if(!debug['l'])			lookup(INITENTRY, 0)->type = SXREF;	} else if(!(*INITENTRY >= '0' && *INITENTRY <= '9'))		lookup(INITENTRY, 0)->type = SXREF; 	while(*argv)		objfile(*argv++);	if(!debug['l'])		loadlib();	firstp = firstp->link;	if(firstp == P)		goto out;	if(doexp || dlm){		EXPTAB = "_exporttab";		zerosig(EXPTAB);		zerosig("etext");		zerosig("edata");		zerosig("end");		if(dlm){			import();			HEADTYPE = 2;			INITTEXT = INITDAT = 0;			INITRND = 8;			INITENTRY = EXPTAB;		}		export();	}	patch();	if(debug['p'])		if(debug['1'])			doprof1();		else			doprof2();	dodata();	follow();	if(firstp == P)		goto out;	noops();	span();	asmb();	undef(); out:	if(debug['v']) {		Bprint(&bso, "%5.2f cpu time\n", cputime());		Bprint(&bso, "%ld memory used\n", tothunk);		Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));		Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));	}	errorexit();} voidaddlibpath(char *arg){	char **p; 	if(nlibdir >= maxlibdir) {		if(maxlibdir == 0)			maxlibdir = 8;		else			maxlibdir *= 2;		p = malloc(maxlibdir*sizeof(*p));		if(p == nil) {			diag("out of memory");			errorexit();		}		memmove(p, libdir, nlibdir*sizeof(*p));		free(libdir);		libdir = p;	}	libdir[nlibdir++] = strdup(arg);} char*findlib(char *file){	int i;	char name[LIBNAMELEN]; 	for(i = 0; i < nlibdir; i++) {		snprint(name, sizeof(name), "%s/%s", libdir[i], file);		if(fileexists(name))			return libdir[i];	}	return nil;} voidloadlib(void){	int i;	long h;	Sym *s; loop:	xrefresolv = 0;	for(i=0; i<libraryp; i++) {		if(debug['v'])			Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i], libraryobj[i]);		objfile(library[i]);	}	if(xrefresolv)	for(h=0; h<nelem(hash); h++)	for(s = hash[h]; s != S; s = s->link)		if(s->type == SXREF)			goto loop;} voiderrorexit(void){ 	Bflush(&bso);	if(nerrors) {		if(cout >= 0)			remove(outfile);		exits("error");	}	exits(0);} voidobjfile(char *file){	long off, esym, cnt, l;	int f, work;	Sym *s;	char magbuf[SARMAG];	char name[LIBNAMELEN], pname[LIBNAMELEN];	struct ar_hdr arhdr;	char *e, *start, *stop; 	if(debug['v'])		Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);	Bflush(&bso);	if(file[0] == '-' && file[1] == 'l') {		snprint(pname, sizeof(pname), "lib%s.a", file+2);		e = findlib(pname);		if(e == nil) {			diag("cannot find library: %s", file);			errorexit();		}		snprint(name, sizeof(name), "%s/%s", e, pname);		file = name;	}	f = open(file, 0);	if(f < 0) {		diag("cannot open %s: %r", file);		errorexit();	}	l = read(f, magbuf, SARMAG);	if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){		/* load it as a regular file */		l = seek(f, 0L, 2);		seek(f, 0L, 0);		ldobj(f, l, file);		close(f);		return;	} 	l = read(f, &arhdr, SAR_HDR);	if(l != SAR_HDR) {		diag("%s: short read on archive file symbol header", file);		goto out;	}	if(strncmp(arhdr.name, symname, strlen(symname))) {		diag("%s: first entry not symbol header", file);		goto out;	} 	esym = SARMAG + SAR_HDR + atolwhex(arhdr.size);	off = SARMAG + SAR_HDR; 	/*	 * just bang the whole symbol file into memory	 */	seek(f, off, 0);	cnt = esym - off;	start = malloc(cnt + 10);	cnt = read(f, start, cnt);	if(cnt <= 0){		close(f);		return;	}	stop = &start[cnt];	memset(stop, 0, 10); 	work = 1;	while(work){		if(debug['v'])			Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file);		Bflush(&bso);		work = 0;		for(e = start; e < stop; e = strchr(e+5, 0) + 1) {			s = lookup(e+5, 0);			if(s->type != SXREF)				continue;			sprint(pname, "%s(%s)", file, s->name);			if(debug['v'])				Bprint(&bso, "%5.2f library: %s\n", cputime(), pname);			Bflush(&bso);			l = e[1] & 0xff;			l |= (e[2] & 0xff) << 8;			l |= (e[3] & 0xff) << 16;			l |= (e[4] & 0xff) << 24;			seek(f, l, 0);			/* need readn to read the dumps (at least) */			l = readn(f, &arhdr, SAR_HDR);			if(l != SAR_HDR)				goto bad;			if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))				goto bad;			l = atolwhex(arhdr.size);			ldobj(f, l, pname);			if(s->type == SXREF) {				diag("%s: failed to load: %s", file, s->name);				errorexit();			}			work = 1;			xrefresolv = 1;		}

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