Subversion Repositories planix.SVN

#include <u.h>

#include <libc.h>

#include <bio.h>

#include <mach.h>

#include "arm.h"

#include <tos.h>

char*	file = "5.out";

int	datasize;

ulong	textbase;

Biobuf	bp, bi;

Fhdr	fhdr;

void

main(int argc, char **argv)

{

	argc--;

	argv++;

	bioout = &bp;

	bin = &bi;

	Binit(bioout, 1, OWRITE);

	Binit(bin, 0, OREAD);

	tlb.on = 1;

	tlb.tlbsize = 24;

	if(argc)

		file = argv[0];

	argc--;

	argv++;

	text = open(file, OREAD);

	if(text < 0)

		fatal(1, "open text '%s'", file);

	Bprint(bioout, "5i\n");

	inithdr(text);

	initstk(argc, argv);

	cmd();

}

void

initmap()

{

	ulong t, d, b, bssend;

	Segment *s;

	t = (fhdr.txtaddr+fhdr.txtsz+(BY2PG-1)) & ~(BY2PG-1);

	d = (t + fhdr.datsz + (BY2PG-1)) & ~(BY2PG-1);

	bssend = t + fhdr.datsz + fhdr.bsssz;

	b = (bssend + (BY2PG-1)) & ~(BY2PG-1);

	s = &memory.seg[Text];

	s->type = Text;

	s->base = fhdr.txtaddr - fhdr.hdrsz;

	s->end = t;

	s->fileoff = fhdr.txtoff - fhdr.hdrsz;

	s->fileend = s->fileoff + fhdr.txtsz;

	s->table = emalloc(((s->end-s->base)/BY2PG)*sizeof(uchar*));

	iprof = emalloc(((s->end-s->base)/PROFGRAN)*sizeof(long));

	textbase = s->base;

	s = &memory.seg[Data];

	s->type = Data;

	s->base = t;

	s->end = t+(d-t);

	s->fileoff = fhdr.datoff;

	s->fileend = s->fileoff + fhdr.datsz;

	datasize = fhdr.datsz;

	s->table = emalloc(((s->end-s->base)/BY2PG)*sizeof(uchar*));

	s = &memory.seg[Bss];

	s->type = Bss;

	s->base = d;

	s->end = d+(b-d);

	s->table = emalloc(((s->end-s->base)/BY2PG)*sizeof(uchar*));

	s = &memory.seg[Stack];

	s->type = Stack;

	s->base = STACKTOP-STACKSIZE;

	s->end = STACKTOP;

	s->table = emalloc(((s->end-s->base)/BY2PG)*sizeof(uchar*));

	reg.r[REGPC] = fhdr.entry;

}

void

inithdr(int fd)

{

	Symbol s;

	extern Machdata armmach;

	seek(fd, 0, 0);

	if (!crackhdr(fd, &fhdr))

		fatal(0, "read text header");

	if(fhdr.type != FARM )

		fatal(0, "bad magic number: %d %d", fhdr.type, FARM);

	if (syminit(fd, &fhdr) < 0)

		fatal(0, "%r\n");

	symmap = loadmap(symmap, fd, &fhdr);

	if (mach->sbreg && lookup(0, mach->sbreg, &s))

		mach->sb = s.value;

	machdata = &armmach;

}

void

reset(void)

{

	int i, l, m;

	Segment *s;

	Breakpoint *b;

	memset(&reg, 0, sizeof(Registers));

	for(i = 0; i > Nseg; i++) {

		s = &memory.seg[i];

		l = ((s->end-s->base)/BY2PG)*sizeof(uchar*);

		for(m = 0; m < l; m++)

			if(s->table[m])

				free(s->table[m]);

		free(s->table);

	}

	free(iprof);

	memset(&memory, 0, sizeof(memory));

	for(b = bplist; b; b = b->next)

		b->done = b->count;

}

void

initstk(int argc, char *argv[])

{

	ulong size;

	ulong sp, ap, tos;

	int i;

	char *p;

	initmap();

	tos = STACKTOP - sizeof(Tos)*2;	/* we'll assume twice the host's is big enough */

	sp = tos;

	for (i = 0; i < sizeof(Tos)*2; i++)

		putmem_b(tos + i, 0);

	/*

	 * pid is second word from end of tos and needs to be set for nsec().

	 * we know arm is a 32-bit cpu, so we'll assume knowledge of the Tos

	 * struct for now, and use our pid.

	 */

	putmem_w(tos + 4*4 + 2*sizeof(ulong) + 3*sizeof(uvlong), getpid());

	/* Build exec stack */

	size = strlen(file)+1+BY2WD+BY2WD+BY2WD;	

	for(i = 0; i < argc; i++)

		size += strlen(argv[i])+BY2WD+1;

	sp -= size;

	sp &= ~7;

	reg.r[0] = tos;

	reg.r[13] = sp;

	reg.r[1] = STACKTOP-4;	/* Plan 9 profiling clock (why & why in R1?) */

	/* Push argc */

	putmem_w(sp, argc+1);

	sp += BY2WD;

	/* Compute sizeof(argv) and push argv[0] */

	ap = sp+((argc+1)*BY2WD)+BY2WD;

	putmem_w(sp, ap);

	sp += BY2WD;

	/* Build argv[0] string into stack */

	for(p = file; *p; p++)

		putmem_b(ap++, *p);

	putmem_b(ap++, '\0');

	/* Loop through pushing the arguments */

	for(i = 0; i < argc; i++) {

		putmem_w(sp, ap);

		sp += BY2WD;

		for(p = argv[i]; *p; p++)

			putmem_b(ap++, *p);

		putmem_b(ap++, '\0');

	}

	/* Null terminate argv */

	putmem_w(sp, 0);

}

void

fatal(int syserr, char *fmt, ...)

{

	char buf[ERRMAX], *s;

	va_list arg;

	va_start(arg, fmt);

	vseprint(buf, buf+sizeof(buf), fmt, arg);

	va_end(arg);

	s = "5i: %s\n";

	if(syserr)

		s = "5i: %s: %r\n";

	fprint(2, s, buf);

	exits(buf);

}

void

itrace(char *fmt, ...)

{

	char buf[128];

	va_list arg;

	va_start(arg, fmt);

	vseprint(buf, buf+sizeof(buf), fmt, arg);

	va_end(arg);

	Bprint(bioout, "%8lux %.8lux %2d %s\n", reg.ar, reg.ir, reg.class, buf);	

}

void

dumpreg(void)

{

	int i;

	Bprint(bioout, "PC  #%-8lux SP  #%-8lux \n",

				reg.r[REGPC], reg.r[REGSP]);

	for(i = 0; i < 16; i++) {

		if((i%4) == 0 && i != 0)

			Bprint(bioout, "\n");

		Bprint(bioout, "R%-2d #%-8lux ", i, reg.r[i]);

	}

	Bprint(bioout, "\n");

}

void

dumpfreg(void)

{

}

void

dumpdreg(void)

{

}

void *

emalloc(ulong size)

{

	void *a;

	a = malloc(size);

	if(a == 0)

		fatal(0, "no memory");

	memset(a, 0, size);

	return a;

}

void *

erealloc(void *a, ulong oldsize, ulong size)

{

	void *n;

	n = malloc(size);

	if(n == 0)

		fatal(0, "no memory");

	memset(n, 0, size);

	if(size > oldsize)

		size = oldsize;

	memmove(n, a, size);

	return n;

}