/*  * 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. */ #include	"l.h" #define JMPSZ	sizeof(u32int)		/* size of bootstrap jump section */ #define	LPUT(c)\	{\		cbp[0] = (c)>>24;\		cbp[1] = (c)>>16;\		cbp[2] = (c)>>8;\		cbp[3] = (c);\		cbp += 4;\		cbc -= 4;\		if(cbc <= 0)\			cflush();\	} #define	CPUT(c)\	{\		cbp[0] = (c);\		cbp++;\		cbc--;\		if(cbc <= 0)\			cflush();\	} void	strnput(char*, int); longentryvalue(void){	char *a;	Sym *s; 	a = INITENTRY;	if(*a >= '0' && *a <= '9')		return atolwhex(a);	s = lookup(a, 0);	if(s->type == 0)		return INITTEXT;	if(dlm && s->type == SDATA)		return s->value+INITDAT;	if(s->type != STEXT && s->type != SLEAF)		diag("entry not text: %s", s->name);	return s->value;} static voidelf32jmp(Putl putl){	/* describe a tiny text section at end with jmp to start; see below */	elf32phdr(putl, PT_LOAD, HEADR+textsize-JMPSZ, 0xFFFFFFFC, 0xFFFFFFFC,		JMPSZ, JMPSZ, R|X, 0);	/* text */} voidasmb(void){	Prog *p;	long t;	Optab *o;	long prevpc; 	if(debug['v'])		Bprint(&bso, "%5.2f asm\n", cputime());	Bflush(&bso); 	/* emit text segment */	seek(cout, HEADR, 0);	prevpc = pc = INITTEXT;	for(p = firstp; p != P; p = p->link) {		if(p->as == ATEXT) {			curtext = p;			autosize = p->to.offset + 4;			if(p->from3.type == D_CONST) {				for(; pc < p->pc; pc++)					CPUT(0);			}		}		if(p->pc != pc) {			diag("phase error %lux sb %lux",				p->pc, pc);			if(!debug['a'])				prasm(curp);			pc = p->pc;		}		curp = p;		o = oplook(p);	/* could probably avoid this call */		if(asmout(p, o, 0)) {			p = p->link;			pc += 4;		}		pc += o->size;		if (prevpc & (1<<31) && (pc & (1<<31)) == 0) {			char *tn; 			tn = "??none??";			if(curtext != P && curtext->from.sym != S)				tn = curtext->from.sym->name;			Bprint(&bso, "%s: warning: text segment wrapped past 0\n", tn);		}		prevpc = pc;	} 	if(debug['a'])		Bprint(&bso, "\n");	Bflush(&bso);	cflush(); 	/* emit data segment */	curtext = P;	switch(HEADTYPE) {	case 6:		/*		 * but first, for virtex 4, inject a jmp instruction after		 * other text: branch to absolute entry address (0xfffe2100).		 */		lput((18 << 26) | (0x03FFFFFC & entryvalue()) | 2);		textsize += JMPSZ;		cflush();		/* fall through */	case 0:	case 1:	case 2:	case 5:		seek(cout, HEADR+textsize, 0);		break;	case 3:		seek(cout, rnd(HEADR+textsize, 4), 0);		break;	case 4:		seek(cout, rnd(HEADR+textsize, 4096), 0);		break;	} 	if(dlm){		char buf[8]; 		write(cout, buf, INITDAT-textsize);		textsize = INITDAT;	} 	for(t = 0; t < datsize; t += sizeof(buf)-100) {		if(datsize-t > sizeof(buf)-100)			datblk(t, sizeof(buf)-100);		else			datblk(t, datsize-t);	} 	symsize = 0;	lcsize = 0;	if(!debug['s']) {		if(debug['v'])			Bprint(&bso, "%5.2f sym\n", cputime());		Bflush(&bso);		switch(HEADTYPE) {		case 0:		case 1:		case 2:		case 5:		case 6:			seek(cout, HEADR+textsize+datsize, 0);			break;		case 3:			seek(cout, rnd(HEADR+textsize, 4)+datsize, 0);			break;		case 4:			seek(cout, rnd(HEADR+textsize, 4096)+datsize, 0);			break;		}		if(!debug['s'])			asmsym();		if(debug['v'])			Bprint(&bso, "%5.2f sp\n", cputime());		Bflush(&bso);		if(!debug['s'])			asmlc();		if(dlm)			asmdyn();		if(HEADTYPE == 0 || HEADTYPE == 1)	/* round up file length for boot image */			if((symsize+lcsize) & 1)				CPUT(0);		cflush();	}	else if(dlm){		asmdyn();		cflush();	} 	/* back up and write the header */	seek(cout, 0L, 0);	switch(HEADTYPE) {	case 0:		lput(0x1030107);		/* magic and sections */		lput(textsize);			/* sizes */		lput(datsize);		lput(bsssize);		lput(symsize);			/* nsyms */		lput(entryvalue());		/* va of entry */		lput(0L);		lput(lcsize);		break;	case 1:		lput(0x4a6f7921);		/* Joy! */		lput(0x70656666);		/* peff */		lput(0x70777063);		/* pwpc */		lput(1);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0x30002);			/*YY*/		lput(0);		lput(~0);		lput(0);		lput(textsize+datsize);		lput(textsize+datsize);		lput(textsize+datsize);		lput(0xd0);			/* header size */		lput(0x10400);		lput(~0);		lput(0);		lput(0xc);		lput(0xc);		lput(0xc);		lput(0xc0);		lput(0x01010400);		lput(~0);		lput(0);		lput(0x38);		lput(0x38);		lput(0x38);		lput(0x80);		lput(0x04040400);		lput(0);		lput(1);		lput(0);		lput(~0);		lput(0);		lput(~0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0);		lput(0x3100);			/* load address */		lput(0);		lput(0);		lput(0);			/* whew! */		break;	case 2:		if(dlm)			lput(0x80000000 | (4*21*21+7));		/* magic */		else			lput(4*21*21+7);	/* magic */		lput(textsize);			/* sizes */		lput(datsize);		lput(bsssize);		lput(symsize);			/* nsyms */		lput(entryvalue());		/* va of entry */		lput(0L);		lput(lcsize);		break;	case 3:		break;	case 4:		lput((0x1DFL<<16)|3L);		/* magic and sections */		lput(time(0));			/* time and date */		lput(rnd(HEADR+textsize, 4096)+datsize);		lput(symsize);			/* nsyms */		lput((0x48L<<16)|15L);		/* size of optional hdr and flags */ 		lput((0413<<16)|01L);		/* magic and version */		lput(textsize);			/* sizes */		lput(datsize);		lput(bsssize);		lput(entryvalue());		/* va of entry */		lput(INITTEXT);			/* va of base of text */		lput(INITDAT);			/* va of base of data */		lput(INITDAT);			/* address of TOC */		lput((1L<<16)|1);		/* sn(entry) | sn(text) */		lput((2L<<16)|1);		/* sn(data) | sn(toc) */		lput((0L<<16)|3);		/* sn(loader) | sn(bss) */		lput((3L<<16)|3);		/* maxalign(text) | maxalign(data) */		lput(('1'<<24)|('L'<<16)|0);	/* type field, and reserved */		lput(0);			/* max stack allowed */		lput(0);			/* max data allowed */		lput(0); lput(0); lput(0);	/* reserved */ 		strnput(".text", 8);		/* text segment */		lput(INITTEXT);			/* address */		lput(INITTEXT);		lput(textsize);		lput(HEADR);		lput(0L);		lput(HEADR+textsize+datsize+symsize);		lput(lcsize);			/* line number size */		lput(0x20L);			/* flags */ 		strnput(".data", 8);		/* data segment */		lput(INITDAT);			/* address */		lput(INITDAT);		lput(datsize);		lput(rnd(HEADR+textsize, 4096));/* sizes */		lput(0L);		lput(0L);		lput(0L);		lput(0x40L);			/* flags */ 		strnput(".bss", 8);		/* bss segment */		lput(INITDAT+datsize);		/* address */		lput(INITDAT+datsize);		lput(bsssize);		lput(0L);		lput(0L);		lput(0L);		lput(0L);		lput(0x80L);			/* flags */		break;	case 5:		/*		 * intended for blue/gene		 */		elf32(POWER, ELFDATA2MSB, 0, nil);		break;	case 6:		/*		 * intended for virtex 4 boot		 */		debug['S'] = 1;			/* symbol table */		elf32(POWER, ELFDATA2MSB, 1, elf32jmp);		break;	}	cflush();} voidstrnput(char *s, int n){	for(; *s; s++){		CPUT(*s);		n--;	}	for(; n > 0; n--)		CPUT(0);} voidcput(long l){	CPUT(l);} voidwput(long l){	cbp[0] = l>>8;	cbp[1] = l;	cbp += 2;	cbc -= 2;	if(cbc <= 0)		cflush();} voidwputl(long l){	cbp[0] = l;	cbp[1] = l>>8;	cbp += 2;	cbc -= 2;	if(cbc <= 0)		cflush();} voidlput(long l){	LPUT(l);} voidlputl(long c){	cbp[0] = (c);	cbp[1] = (c)>>8;	cbp[2] = (c)>>16;	cbp[3] = (c)>>24;	cbp += 4;	cbc -= 4;	if(cbc <= 0)		cflush();} voidllput(vlong v){	lput(v>>32);	lput(v);} voidllputl(vlong v){	lputl(v);	lputl(v>>32);} voidcflush(void){	int n; 	n = sizeof(buf.cbuf) - cbc;	if(n)		write(cout, buf.cbuf, n);	cbp = buf.cbuf;	cbc = sizeof(buf.cbuf);} voidasmsym(void){	Prog *p;	Auto *a;	Sym *s;	int h; 	s = lookup("etext", 0);	if(s->type == STEXT)		putsymb(s->name, 'T', s->value, s->version); 	for(h=0; h<NHASH; h++)		for(s=hash[h]; s!=S; s=s->link)			switch(s->type) {			case SCONST:				putsymb(s->name, 'D', s->value, s->version);				continue; 			case SDATA:				putsymb(s->name, 'D', s->value+INITDAT, s->version);				continue; 			case SBSS:				putsymb(s->name, 'B', s->value+INITDAT, s->version);				continue; 			case SFILE:				putsymb(s->name, 'f', s->value, s->version);				continue;			} 	for(p=textp; p!=P; p=p->cond) {		s = p->from.sym;		if(s->type != STEXT && s->type != SLEAF)			continue; 		/* filenames first */		for(a=p->to.autom; a; a=a->link)			if(a->type == D_FILE)				putsymb(a->sym->name, 'z', a->aoffset, 0);			else			if(a->type == D_FILE1)				putsymb(a->sym->name, 'Z', a->aoffset, 0); 		if(s->type == STEXT)			putsymb(s->name, 'T', s->value, s->version);		else			putsymb(s->name, 'L', s->value, s->version); 		/* frame, auto and param after */		putsymb(".frame", 'm', p->to.offset+4, 0);		for(a=p->to.autom; a; a=a->link)			if(a->type == D_AUTO)				putsymb(a->sym->name, 'a', -a->aoffset, 0);			else			if(a->type == D_PARAM)				putsymb(a->sym->name, 'p', a->aoffset, 0);	}	if(debug['v'] || debug['n'])		Bprint(&bso, "symsize = %lud\n", symsize);	Bflush(&bso);} voidputsymb(char *s, int t, long v, int ver)

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