xmon.c

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	    case 'v':
		size = 1;
		break;
	    case 'w':
		size = 2;
		break;
	    case 'l':
		size = 4;
		break;
	    case '^':
		adrs -= size;
		break;
		break;
	    case '/':
		if (nslash > 0)
		    adrs -= 1 << nslash;
		else
		    nslash = 0;
		nslash += 4;
		adrs += 1 << nslash;
		break;
	    case '\\':
		if (nslash < 0)
		    adrs += 1 << -nslash;
		else
		    nslash = 0;
		nslash -= 4;
		adrs -= 1 << -nslash;
		break;
	    case 'm':
		scanhex(&adrs);
		break;
	    case 'n':
		mnoread = 1;
		break;
	    case 'r':
		brev = !brev;
		break;
	    case '<':
		n = size;
		scanhex(&n);
		adrs -= n;
		break;
	    case '>':
		n = size;
		scanhex(&n);
		adrs += n;
		break;
	    }
	}
	adrs += inc;
    }
}

int
bsesc()
{
	int c;

	c = inchar();
	switch( c ){
	case 'n':	c = '\n';	break;
	case 'r':	c = '\r';	break;
	case 'b':	c = '\b';	break;
	case 't':	c = '\t';	break;
	}
	return c;
}

void
dump()
{
	int c;

	c = inchar();
	if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n')
		termch = c;
	scanhex(&adrs);
	if( termch != '\n')
		termch = 0;
	if( c == 'i' ){
		scanhex(&nidump);
		if( nidump == 0 )
			nidump = 16;
		adrs += ppc_inst_dump(adrs, nidump);
		last_cmd = "di\n";
	} else {
		scanhex(&ndump);
		if( ndump == 0 )
			ndump = 64;
		prdump(adrs, ndump);
		adrs += ndump;
		last_cmd = "d\n";
	}
}

void
prdump(unsigned adrs, int ndump)
{
	register int n, m, c, r, nr;
	unsigned char temp[16];

	for( n = ndump; n > 0; ){
		printf("%.8x", adrs);
		putchar(' ');
		r = n < 16? n: 16;
		nr = mread(adrs, temp, r);
		adrs += nr;
		for( m = 0; m < r; ++m ){
			putchar((m & 3) == 0 && m > 0? '.': ' ');
			if( m < nr )
				printf("%.2x", temp[m]);
			else
				printf("%s", fault_chars[fault_type]);
		}
		for(; m < 16; ++m )
			printf("   ");
		printf("  |");
		for( m = 0; m < r; ++m ){
			if( m < nr ){
				c = temp[m];
				putchar(' ' <= c && c <= '~'? c: '.');
			} else
				putchar(' ');
		}
		n -= r;
		for(; m < 16; ++m )
			putchar(' ');
		printf("|\n");
		if( nr < r )
			break;
	}
}

int
ppc_inst_dump(unsigned adr, int count)
{
	int nr, dotted;
	unsigned first_adr;
	unsigned long inst, last_inst;
	unsigned char val[4];

	dotted = 0;
	for (first_adr = adr; count > 0; --count, adr += 4){
		nr = mread(adr, val, 4);
		if( nr == 0 ){
			const char *x = fault_chars[fault_type];
			printf("%.8x  %s%s%s%s\n", adr, x, x, x, x);
			break;
		}
		inst = GETWORD(val);
		if (adr > first_adr && inst == last_inst) {
			if (!dotted) {
				printf(" ...\n");
				dotted = 1;
			}
			continue;
		}
		dotted = 0;
		last_inst = inst;
		printf("%.8x  ", adr);
		printf("%.8x\t", inst);
		print_insn_big_powerpc(stdout, inst, adr);	/* always returns 4 */
		printf("\n");
	}
	return adr - first_adr;
}

void
print_address(addr)
unsigned addr;
{
	printf("0x%x", addr);
}

/*
 * Memory operations - move, set, print differences
 */
static unsigned mdest;		/* destination address */
static unsigned msrc;		/* source address */
static unsigned mval;		/* byte value to set memory to */
static unsigned mcount;		/* # bytes to affect */
static unsigned mdiffs;		/* max # differences to print */

void
memops(int cmd)
{
	scanhex(&mdest);
	if( termch != '\n' )
		termch = 0;
	scanhex(cmd == 's'? &mval: &msrc);
	if( termch != '\n' )
		termch = 0;
	scanhex(&mcount);
	switch( cmd ){
	case 'm':
		memmove((void *)mdest, (void *)msrc, mcount);
		break;
	case 's':
		memset((void *)mdest, mval, mcount);
		break;
	case 'd':
		if( termch != '\n' )
			termch = 0;
		scanhex(&mdiffs);
		memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs);
		break;
	}
}

void
memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr)
{
	unsigned n, prt;

	prt = 0;
	for( n = nb; n > 0; --n )
		if( *p1++ != *p2++ )
			if( ++prt <= maxpr )
				printf("%.8x %.2x # %.8x %.2x\n", (unsigned)p1 - 1,
					p1[-1], (unsigned)p2 - 1, p2[-1]);
	if( prt > maxpr )
		printf("Total of %d differences\n", prt);
}

static unsigned mend;
static unsigned mask;

void
memlocate()
{
	unsigned a, n;
	unsigned char val[4];

	last_cmd = "ml";
	scanhex(&mdest);
	if (termch != '\n') {
		termch = 0;
		scanhex(&mend);
		if (termch != '\n') {
			termch = 0;
			scanhex(&mval);
			mask = ~0;
			if (termch != '\n') termch = 0;
			scanhex(&mask);
		}
	}
	n = 0;
	for (a = mdest; a < mend; a += 4) {
		if (mread(a, val, 4) == 4
			&& ((GETWORD(val) ^ mval) & mask) == 0) {
			printf("%.8x:  %.8x\n", a, GETWORD(val));
			if (++n >= 10)
				break;
		}
	}
}

static unsigned mskip = 0x1000;
static unsigned mlim = 0xffffffff;

void
memzcan()
{
	unsigned char v;
	unsigned a;
	int ok, ook;

	scanhex(&mdest);
	if (termch != '\n') termch = 0;
	scanhex(&mskip);
	if (termch != '\n') termch = 0;
	scanhex(&mlim);
	ook = 0;
	for (a = mdest; a < mlim; a += mskip) {
		ok = mread(a, &v, 1);
		if (ok && !ook) {
			printf("%.8x .. ", a);
			fflush(stdout);
		} else if (!ok && ook)
			printf("%.8x\n", a - mskip);
		ook = ok;
		if (a + mskip < a)
			break;
	}
	if (ook)
		printf("%.8x\n", a - mskip);
}

/* Input scanning routines */
int
skipbl()
{
	int c;

	if( termch != 0 ){
		c = termch;
		termch = 0;
	} else
		c = inchar();
	while( c == ' ' || c == '\t' )
		c = inchar();
	return c;
}

#define N_PTREGS	44
static char *regnames[N_PTREGS] = {
	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
	"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
	"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
	"pc", "msr", "or3", "ctr", "lr", "xer", "ccr", "mq",
	"trap", "dar", "dsisr", "res"
};

int
scanhex(vp)
unsigned *vp;
{
	int c, d;
	unsigned v;

	c = skipbl();
	if (c == '%') {
		/* parse register name */
		char regname[8];
		int i;

		for (i = 0; i < sizeof(regname) - 1; ++i) {
			c = inchar();
			if (!isalnum(c)) {
				termch = c;
				break;
			}
			regname[i] = c;
		}
		regname[i] = 0;
		for (i = 0; i < N_PTREGS; ++i) {
			if (strcmp(regnames[i], regname) == 0) {
				unsigned *rp = (unsigned *)
					xmon_regs[smp_processor_id()];
				if (rp == NULL) {
					printf("regs not available\n");
					return 0;
				}
				*vp = rp[i];
				return 1;
			}
		}
		printf("invalid register name '%%%s'\n", regname);
		return 0;
	} else if (c == '$') {
		static char symname[64];
		int i;
		for (i=0; i<63; i++) {
			c = inchar();
			if (isspace(c)) {
				termch = c;
				break;
			}
			symname[i] = c;
		}
		symname[i++] = 0;
		*vp = xmon_symbol_to_addr(symname);
		if (!(*vp)) {
			printf("unknown symbol\n");
			return 0;
		}
		return 1;
	}

	d = hexdigit(c);
	if( d == EOF ){
		termch = c;
		return 0;
	}
	v = 0;
	do {
		v = (v << 4) + d;
		c = inchar();
		d = hexdigit(c);
	} while( d != EOF );
	termch = c;
	*vp = v;
	return 1;
}

void
scannl()
{
	int c;

	c = termch;
	termch = 0;
	while( c != '\n' )
		c = inchar();
}

int
hexdigit(c)
{
	if( '0' <= c && c <= '9' )
		return c - '0';
	if( 'A' <= c && c <= 'F' )
		return c - ('A' - 10);
	if( 'a' <= c && c <= 'f' )
		return c - ('a' - 10);
	return EOF;
}

void
getstring(char *s, int size)
{
	int c;

	c = skipbl();
	do {
		if( size > 1 ){
			*s++ = c;
			--size;
		}
		c = inchar();
	} while( c != ' ' && c != '\t' && c != '\n' );
	termch = c;
	*s = 0;
}

static char line[256];
static char *lineptr;

void
flush_input()
{
	lineptr = NULL;
}

int
inchar()
{
	if (lineptr == NULL || *lineptr == 0) {
		if (fgets(line, sizeof(line), stdin) == NULL) {
			lineptr = NULL;
			return EOF;
		}
		lineptr = line;
	}
	return *lineptr++;
}

void
take_input(str)
char *str;
{
	lineptr = str;
}

void
sysmap_lookup(void)
{
	int type = inchar();
	unsigned addr;
	static char tmp[64];
	char* cur;

	extern char *sysmap;
	extern unsigned long sysmap_size;
	if ( !sysmap || !sysmap_size )
		return;

	switch(type) {
		case 'a':
			if (scanhex(&addr)) {
				pretty_print_addr(addr);
				printf("\n");
			}
			termch = 0;
			break;
		case 's':
			getstring(tmp, 64);
			if( setjmp(bus_error_jmp) == 0 ) {
				debugger_fault_handler = handle_fault;
				sync();
				cur = sysmap;
				do {
					cur = strstr(cur, tmp);
					if (cur) {
						static char res[64];
						char *p, *d;
						p = cur;
						while(p > sysmap && *p != 10)
							p--;
						if (*p == 10) p++;
						d = res;
						while(*p && p < (sysmap + sysmap_size) && *p != 10)
							*(d++) = *(p++);
						*(d++) = 0;
						printf("%s\n", res);
						cur++;
					}
				} while (cur);
				sync();
			}
			debugger_fault_handler = 0;
			termch = 0;
			break;
	}
}

static int
pretty_print_addr(unsigned long addr)
{
	char *sym;
	unsigned long saddr;
	
	printf("%08x", addr);
	sym = xmon_find_symbol(addr, &saddr);
	if (sym)
		printf(" (%s+0x%x)", sym, addr-saddr);
	return (sym != 0);
}

char*
xmon_find_symbol(unsigned long addr, unsigned long* saddr)
{
	static char rbuffer[64];
	char *p, *ep, *limit;
	unsigned long prev, next;
	char* psym;

	extern char *sysmap;
	extern unsigned long sysmap_size;
	if ( !sysmap || !sysmap_size )
		return NULL;
	
	prev = 0;
	psym = NULL;
	p = sysmap;
	limit = p + sysmap_size;
	if( setjmp(bus_error_jmp) == 0 ) {
		debugger_fault_handler = handle_fault;
		sync();
		do {
			next = simple_strtoul(p, &p, 16);
			if (next > addr && prev <= addr) {
				if (!psym)
					goto bail;
				ep = rbuffer;
				p = psym;
				while(*p && p < limit && *p == 32)
					p++;
				while(*p && p < limit && *p != 10 && (ep - rbuffer) < 63)
					*(ep++) = *(p++);
				*(ep++) = 0;
				if (saddr)
					*saddr = prev;
				debugger_fault_handler = 0;
				return rbuffer;
			}
			prev = next;
			psym = p;
			while(*p && p < limit && *p != 10)
				p++;
			if (*p) p++;
		} while(*p && p < limit && next);
bail:
		sync();
	}
	debugger_fault_handler = 0;
	return NULL;
}

unsigned long
xmon_symbol_to_addr(char* symbol)
{
	char *p, *cur;
	char *match;
	int goodness = 0;
	int result = 0;
	
	extern char *sysmap;
	extern unsigned long sysmap_size;
	if ( !sysmap || !sysmap_size )
		return 0;

	if( setjmp(bus_error_jmp) == 0 ) {
		debugger_fault_handler = handle_fault;
		sync();
		cur = sysmap;
		while(cur) {
			cur = strstr(cur, symbol);
			if (cur) {
				int gd = 1;

				/* best match if equal, better match if
				 * begins with
				 */
				if (cur == sysmap || *(cur-1) == ' ') {
					gd++;
					if (cur[strlen(symbol)] == 10)
						gd++;
				}
				if (gd > goodness) {
					match = cur;
					goodness = gd;
					if (gd == 3)
						break;
				}
				cur++;
			}
		}	
		if (goodness) {
			p = match;
			while(p > sysmap && *p != 10)
				p--;
			if (*p == 10) p++;
			result = simple_strtoul(p, &p, 16);
		}
		sync();
	}
	debugger_fault_handler = 0;
	return result;
}