#include <lib9.h>#include <bio.h>#include <ctype.h>#include "mach.h"#define Extern extern#include "acid.h"#include "../../include/rdbg.h" /* * remote kernel debugging */ enum {	chatty = 0}; static	long	myreadn(int, void*, long);static	int	rproto(int, char*, int); voidremotemap(Map *m, int i){	setmapio(m, i, remget, remput);} /* * send a /proc control message to remote pid, * and await a reply */intsendremote(int pid, char *msg){	int tag;	char dbg[RDBMSGLEN]; 	if(protodebug)		fprint(2, "sendremote: pid %d: %s\n", pid, msg);	if(strcmp(msg, "startstop") == 0)		tag = Tstartstop;	else if(strcmp(msg, "waitstop") == 0)		tag = Twaitstop;	else if(strcmp(msg, "start") == 0)		tag = Tstart;	else if(strcmp(msg, "stop") == 0)		tag = Tstop;	else if(strcmp(msg, "kill") == 0)		tag = Tkill;	else {		werrstr("invalid sendremote: %s", msg);		return -1;	}	memset(dbg, 0, sizeof(dbg));	dbg[0] = tag;	dbg[1] = pid>>24;	dbg[2] = pid>>16;	dbg[3] = pid>>8;	dbg[4] = pid;	if(rproto(remfd, dbg, sizeof(dbg)) < 0)		return -1;	return 0;} /* * read a line from /proc/<pid>/<file> into buf */intremoteio(int pid, char *file, char *buf, int nb){	char dbg[RDBMSGLEN];	int tag; 	if(protodebug)		fprint(2, "remoteio %d: %s\n", pid, file);	memset(buf, 0, nb);	if(strcmp(file, "proc") == 0)		tag = Tproc;	else if(strcmp(file, "status") == 0)		tag = Tstatus;	else if(strcmp(file, "note") == 0)		tag = Trnote;	else {		werrstr("invalid remoteio: %s", file);		return -1;	}	memset(dbg, 0, sizeof(dbg));	dbg[0] = tag;	dbg[1] = pid>>24;	dbg[2] = pid>>16;	dbg[3] = pid>>8;	dbg[4] = pid;	if(rproto(remfd, dbg, sizeof(dbg)) < 0)		return -1;	if(nb > sizeof(dbg)-1)		nb = sizeof(dbg)-1;	memmove(buf, dbg+1, nb);	return strlen(buf);} intremget(struct segment *s, ulong addr, long off, char *buf, int size){	int n, t;	char dbg[RDBMSGLEN]; 	if (protodebug)		fprint(2, "remget addr %#lux off %#lux\n", addr, off);	for (t = 0; t < size; t += n) {		n = size;		if(n > 9)			n = 9;		memset(dbg, 0, sizeof(dbg));		dbg[0] = Tmget;		dbg[1] = off>>24;		dbg[2] = off>>16;		dbg[3] = off>>8;		dbg[4] = off;		dbg[5] = n;		if(rproto(s->fd, dbg, sizeof(dbg)) < 0) {			werrstr("can't read address %#lux: %r", addr);			return -1;		}		memmove(buf, dbg+1, n);		buf += n;	}	return t;} intremput(struct segment *s, ulong addr, long off, char *buf, int size){	int n, i, t;	char dbg[RDBMSGLEN]; 	if (protodebug)		fprint(2, "remput addr %#lux off %#lux\n", addr, off);	for (t = 0; t < size; t += n) {		n = size;		if(n > 4)			n = 4;		memset(dbg, 0, sizeof(dbg));		dbg[0] = Tmput;		dbg[1] = off>>24;		dbg[2] = off>>16;		dbg[3] = off>>8;		dbg[4] = off;		dbg[5] = n;		for(i=0; i<n; i++)			dbg[6+i] = *buf++;		if(rproto(s->fd, dbg, sizeof(dbg)) < 0) {			werrstr("can't write address %#lux: %r", addr);			return -1;		}	}	return t;} intremcondset(char op, ulong val){	char dbg[RDBMSGLEN]; 	if (protodebug)		fprint(2, "remcondset op %c val: %#lux\n", op, val);	memset(dbg, 0, sizeof(dbg)); 	dbg[0] = Tcondbreak;	dbg[1] = val>>24;	dbg[2] = val>>16;	dbg[3] = val>>8;	dbg[4] = val;	dbg[5] = op;	if(rproto(remfd, dbg, sizeof(dbg)) < 0) {		werrstr("can't set condbreak: %c %#lux: %r", op, val);		return -1;	}	return 0;} intremcondstartstop(int pid){	char dbg[RDBMSGLEN]; 	if (protodebug) 		fprint(2, "remcondstartstop pid %d\n", pid);	memset(dbg, 0, sizeof(dbg)); 	dbg[0] = Tstartstop;	dbg[1] = pid>>24;	dbg[2] = pid>>16;	dbg[3] = pid>>8;	dbg[4] = pid; 	if(rproto(remfd, dbg, sizeof(dbg)) < 0) {		werrstr("can't send Tstartstop");		return -1;	} 	return dbg[1];} static intrproto(int fd, char *buf, int nb){	int tag; 	if (protodebug) {		int i;		print("rproto remote write fd %d bytes: %d\n", fd, nb);		for (i=0; i < nb; i++) {			print(" %2.2ux", buf[i]&0xFF);		}		print("\n");	}	tag = buf[0];	if(remote_write(fd, buf, nb) != nb ||	    myreadn(fd, buf, nb) != nb){	/* could set alarm */		werrstr("remote i/o: %r");		return -1;	}	if(buf[0] == Rerr){		buf[nb-1] = 0;		werrstr("remote err: %s", buf+1);		return -1;	}	if(buf[0] != tag+1) {		werrstr("remote proto err: %.2ux", buf[0]&0xff);		return -1;	}	if(chatty) {		int i;		fprint(2, "remote [%d]: ", nb);		for(i=0; i<nb; i++)			fprint(2, " %.2ux", buf[i]&0xff);		fprint(2, "\n");	}	return nb;} /* * this should probably be in lib9 as readn */static longmyreadn(int f, void *av, long n){	char *a;	long m, t; 	if (protodebug) {		print("remote read fd %d bytes: %ld", f, n);	}	a = av;	t = 0;	while(t < n){		m = remote_read(f, a+t, n-t);		if(m < 0){			if(t == 0)				return m;			break;		}		if (protodebug) {			print(" rtn: %ld\n", m);			if (m) {				int i;						for (i=0; i < m; i++)					print(" %2.2ux", a[i+t]&0xFF);				print("\n");			}		}		t += m;	}	return t;}