/* * thumb definition */#include <lib9.h>#include <bio.h>#include "uregt.h"#include "mach.h"  #define	REGOFF(x)	(ulong) (&((struct Ureg *) 0)->x) #define SP		REGOFF(r13)#define PC		REGOFF(pc) #define	REGSIZE		sizeof(struct Ureg) Reglist thumbreglist[] ={	{"LINK",	REGOFF(link),		RINT|RRDONLY, 'X'},	{"TYPE",	REGOFF(type),		RINT|RRDONLY, 'X'},	{"PSR",		REGOFF(psr),		RINT|RRDONLY, 'X'},	{"PC",		PC,			RINT, 'X'},	{"SP",		SP,			RINT, 'X'},	{"R15",		PC,			RINT, 'X'},	{"R14",		REGOFF(r14),		RINT, 'X'},	{"R13",		REGOFF(r13),		RINT, 'X'},	{"R12",		REGOFF(r12),		RINT, 'X'},	{"R11",		REGOFF(r11),		RINT, 'X'},	{"R10",		REGOFF(r10),		RINT, 'X'},	{"R9",		REGOFF(r9),		RINT, 'X'},	{"R8",		REGOFF(r8),		RINT, 'X'},	{"R7",		REGOFF(r7),		RINT, 'X'},	{"R6",		REGOFF(r6),		RINT, 'X'},	{"R5",		REGOFF(r5),		RINT, 'X'},	{"R4",		REGOFF(r4),		RINT, 'X'},	{"R3",		REGOFF(r3),		RINT, 'X'},	{"R2",		REGOFF(r2),		RINT, 'X'},	{"R1",		REGOFF(r1),		RINT, 'X'},	{"R0",		REGOFF(r0),		RINT, 'X'},	{  0 }}; 	/* the machine description */Mach mthumb ={	"thumb",	MARM,	/*MTHUMB,*/		/* machine type */	thumbreglist,	/* register set */	REGSIZE,	/* register set size */	0,		/* fp register set size */	"PC",		/* name of PC */	"SP",		/* name of SP */	"R15",		/* name of link register */	"setR12",	/* static base register name */	0,		/* static base register value */	0x1000,		/* page size */	0x80000000,	/* kernel base */	0,		/* kernel text mask */	2,		/* quantization of pc */	4,		/* szaddr */	4,		/* szreg */	4,		/* szfloat */	8,		/* szdouble */}; typedef struct pcentry pcentry; struct pcentry{	long start;	long stop;}; static pcentry *pctab;static int npctab; voidthumbpctab(Biobuf *b, Fhdr *fp){	int n, o, ta;	uchar c[8];	pcentry *tab; 	Bseek(b, fp->lnpcoff+fp->lnpcsz, 0);	o = (int)Boffset(b);	Bseek(b, 0, 2);	n = (int)Boffset(b)-o;	pctab = (pcentry*)malloc(n);	if(pctab == 0)		return;	ta = fp->txtaddr;	tab = pctab;	Bseek(b, fp->lnpcoff+fp->lnpcsz, 0);	while(Bread(b, c, sizeof(c)) == sizeof(c)){		tab->start = ta + (c[0]<<24)|(c[1]<<16)|(c[2]<<8)|c[3];		tab->stop = ta + (c[4]<<24)|(c[5]<<16)|(c[6]<<8)|c[7];		tab++;	}	npctab = n/sizeof(c);} intthumbpclookup(ulong pc){	ulong l, u, m;	pcentry *tab = pctab; 	l = 0;	u = npctab-1;	while(l < u){		m = (l+u)/2;		if(pc < tab[m].start)			u = m-1;		else if(pc > tab[m].stop)			l = m+1;		else			l = u = m;	}	if(l == u && u >= 0 && u < npctab && tab[u].start <= pc && pc <= tab[u].stop)		return 1;	// thumb	return 0;	// arm}