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libmach: use correct kernel base, kprof: use kernel base from libmach (from applied/kprof patch)

--- a/sys/src/cmd/kprof.c

+++ b/sys/src/cmd/kprof.c

@@ -94,19 +94,25 @@

 		exits(0);

 	if (!textsym(&s, 0))

 		error(0, "no text symbols");

-	tbase = s.value & ~(mach->pgsize-1);	/* align down to page */

-	print("KTZERO %.8llux\n", tbase);

+

+	tbase = mach->kbase;

+	if(tbase != s.value & ~0xFFF)

+		print("warning: kbase %.8llux != tbase %.8llux\n",

+			tbase, s.value&~0xFFF);

+	print("KTZERO %.8llux PGSIZE %dKb\n", tbase, mach->pgsize/1024);

 	/*

 	 * Accumulate counts for each function

 	 */

 	cp = 0;

 	k = 0;

-	for (i = 0, j = (s.value-tbase)/PCRES+2; j < n; i++) {

+	for (i = 0, j = 2; j < n; i++) {

 		name = s.name;		/* save name */

 		if (!textsym(&s, i))	/* get next symbol */

 			break;

+		s.value -= tbase;

+		s.value /= PCRES;

 		sum = 0;

-		while (j < n && j*PCRES < s.value-tbase)

+		while (j < n && j < s.value)

 			sum += data[j++];

 		if (sum) {

 			cp = realloc(cp, (k+1)*sizeof(struct COUNTER));

--- a/sys/src/libmach/8.c

+++ b/sys/src/libmach/8.c

@@ -68,7 +68,7 @@

 	"setSB",	/* static base register name (bogus anyways) */

 	0,		/* static base register value */

 	0x1000,		/* page size */

-	0x80100000ULL,	/* kernel base */

+	0xF0100000ULL,	/* kernel base */

 	0xF0000000ULL,	/* kernel text mask */

 	0x7FFFFFFFULL,	/* user stack top */

 	1,		/* quantization of pc */

-- 

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