cli.c

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

/*************************************************************
 * File: mon/cli.c
 * Purpose: Command line interface for MON
 * Author: Phil Bunce ([e-mail])
 * Revision History:
 *	970216	Start of revision history
 *	970216	Switched over to using addCmdRec()
 *	970303	trace_mode removed.
 *	970409	Switched over to using addEnvRec()
 *	971007	Removed %s from printf on break in gotintr
 *	980420	Added ifndef around flush_target for NON_CACHED build
 *	980602	Added shrc_needed to delay execution of shrc cmds.
 *	980715	Added arg to shrc() call.
 *	980717	Always flush D then I for copyback D caches.
 *	980725	Added compare command.
 */

#include <setjmp.h>
#include <signal.h>
#include <string.h>
#include <mon.h>
#include <termio.h>

#include <stdio.h>

#define PREGS		/* enable pseudo regs */

jmp_buf intrbuf;
int xvwmode;             /* crossview mode */
int noecho;
char prnbuf[LINESZ];
char line[LINESZ];
CmdRec *cmdChain;
extern int clilst,*curlst;
extern int shrc_needed;

int gotintr();
char *badhexsym = "%s: neither hex value nor symbol\n";

Optdesc sh_opts[] = {
	{"","The command shell"},
	{"^P","recall previous cmd"},
	{"^N","recall next cmd"},
	{"^F","move cursor right"},
	{"^B","move cursor left"},
	{"^A","move cursor far left"},
	{"^E","move cursor far right"},
	{"^D","delete char at cursor"},
	{"^H","delete char before cursor"},
	{"",""},
	{"!!","repeat last cmd"},
	{"!str","recall and execute cmd str"},
	{"!num","recall and execute cmd num"},
	{"",""},
	{"+-*/()","operators"},
	{"^addr","contents of address"},
	{"@name","contents of register"},
	{"&name","value of symbol"},
	{"0xnum","hex number"},
	{"0onum","octal number"},
	{"0tnum","decimal number"},
	{0}};

int do_vers();
char full_vers_info[80];
Optdesc vers_opts[] = {
	{"[-a]","display version info"},
	{"-a","display all version info"},
	{0}};


#ifdef CROSSVIEW
int do_cp(),do_echo(),do_sc(),do_gc(),do_sr(),do_mr();
int gmx(),smx(),do_init(),do_lo();
#endif

extern Optdesc ab_opts[];
int ab_cmd();

CmdRec moncmds[] = {
	{"h",h_opts,help},
	{"hi",hi_opts,dohi},

	{"m",m_opts,modify},
	{"r",r_opts,registers},

	{"d",d_opts,dump},
	{"l",l_opts,dis},

	{"copy",copy_opts,copy},
	{"fill",fill_opts,fill},

	{"search",search_opts,search},
	{"compare",compare_opts,compare_cmd},

	{"when",w_opts,when},

	{"g",g_opts,go},
	{"c",c_opts,cont},

	{"t",t_opts,trace},
	{"to",to_opts,trace},

	{"b",b_opts,setbp},
	{"db",db_opts,clrbp},

	{"sym",sym_opts,do_sym},
	{"ls",ls_opts,do_ls},

	{"set",set_opts,do_set},
	{"vers",vers_opts,do_vers},

	{"sh",sh_opts,no_cmd},
	{"more",more_opts,no_cmd},

#ifdef GDB_SUPPORT
	{"debug",debug_opts,debug},
#endif
	{"ab",ab_opts,ab_cmd},	/* access (data) bpts */

#ifdef CROSSVIEW
	{"xvw",crossview_opts,no_cmd},
	{"cp",0,do_cp},		/* copy memory range */
	{"echo",0,do_echo}, 	/* echo args */
	{"sc",0,do_sc},	 	/* set config */
	{"gc",0,do_gc},	 	/* get config */
	{"sr",0,do_sr},	 	/* set register */
	{"mr",0,do_mr},	 	/* display modified regs */
	{"gmb",0,gmx},		/* get memory as bytes */
	{"smb",0,smx},		/* set memory as bytes */
	{"gmh",0,gmx},		/* get memory as half-words */
	{"smh",0,smx},		/* set memory as half-words */
	{"gmw",0,gmx},		/* get memory as words */
	{"smw",0,smx},		/* set memory as words */
	{"lo",0,do_lo},		/* binary download */
	{"init",0,do_init},	/* warm (cold) reboot */
#endif
	{0}};

/*************************************************************
*  moninit()
*/
moninit()
{
int i;

for (i=0;moncmds[i].name;i++) addCmdRec(&moncmds[i]);
histinit();
envinit();
ioctl_setup(STDIN);
c0regNames = regs_hw;
c2cRegNames = regs_hw;
c2dRegNames = regs_hw;
if (!matchenv("regstyle")) regnames = regs_hw;
else regnames = regs_sw;
}

/*************************************************************
*  monmain()
*	Called after moninit has been executed
*	o  Prompts for commands and calls do_cmd to execute them
*	o  The setjmp is used to pass control back here if a ^C is typed
*/
monmain()
{
int i,t1,rptcmd;
char prompt[20],tmp[8],*p,*t;
char buf[100];
Ulong adr;

#ifdef PMCC
ioctl(STDIN,SETINTR,intrbuf);
if (setjmp(intrbuf) == 1) { /* on INTR */
	if (curlst == &clilst && regChain) { /* 970826 */
		adr = getPc();
		disasm(buf,adr,read_target(XT_MEM,adr,4));
		printf("break!\n%s\n",buf); /* 971007 */
		}
	else printf("break!\n"); /* 971007 */
	}
#else
setjmp(intrbuf);
if (signal(SIGINT,SIG_IGN) != SIG_IGN) signal(SIGINT,gotintr);
#endif
disableints();
swlst(1);

if (bptTmpId != -1) {
	clrbpt(bptTmpId);
	bptTmpId = -1;
	}

if (shrc_needed) {
	shrc_needed = 0;
	shrc(1);
	}

while (1) {
	ioctl_restore(STDIN); /* in case it has been left in a funny state */
#ifndef NON_CACHED
	flush_target(DCACHE);
	flush_target(ICACHE);
#endif
	if (!*line) { /* line is empty */
		/* don't hang if the env var is bad */
		if (getMonEnv("prompt")) strcpy(prompt,getMonEnv("prompt"));
		else strcpy(prompt,"BAD> ");
			
		if (p = strchr(prompt,'!')) {
			strdchr(p); /* delete the bang */
			sprintf(tmp,"%d",histno);
			stristr(p,tmp);
			}

		printf("%s",prompt);
		get_cmd(line);
		if (!*line || strempty(line)) { /* blank */
			rptcmd = matchenv("rptcmd");
			if (rptcmd) { /* repeat requested */
				t = gethistn(histno-1);
				if (rptcmd == 1) strcpy(line,t); /* all cmds */
				else if (rptcmd == 2) { /* trace only */
					if (wordsz(t) > 10) continue;
					getword(tmp,t);
					if (strequ(tmp,"t")||strequ(tmp,"to")) 
						strcpy(line,tmp);
					else 	continue;
					}
				else {
					printf("bad rptcmd value [%s]\n",
							getMonEnv("rptcmd"));
					continue;
					}
				}
			else continue;
			}
		}
	do_cmd(line);
	}
}


#if 0
/*************************************************************
*  gotintr()
*/
gotintr()
{
char buf[100];
Ulong adr;

signal(SIGINT,gotintr);
if (curlst == &clilst && regChain) { /* 970826 */
	adr = getPc();
	disasm(buf,adr,read_target(XT_MEM,adr,4));
	printf("break!\n%s\n",buf); /* 971007 */
	}
else printf("break!\n"); /* 971007 */
longjmp(intrbuf,0);
}
#endif

/*************************************************************
*  do_cmd(p)
*	execute a command, the string pointed to by p.
*	warning: p does get written to
*	o  Commands are invoked as if executed from a standard command
*	   shell. i.e. they are passed an argc/argv argument list.
*/
do_cmd(cmd)
char *cmd;
{
char *av[MAX_AC];	/* argument holder */
int ac;			/* # of arguments */
char *t,tmp[200];
int i,c,r;
CmdRec *p;

for (;*cmd;) {
	/* look for ';' that is not enclosed within "" or '' */
	for (t=cmd;*t;) {
		c = *t;
		if(c == '\'' || c == '"') {
			t++;
			while(*t && *t != c) ++t;
			if(*t) t++;
			}
		else if (c == ';') break;
		else t++;
		}
	/* copy the 1st cmd into tmp, and then remove it from cmd */
	strNcpy(tmp,cmd,t-cmd);
	if (c == ';') i = (t-cmd)+1;
	else i = t-cmd;
	for (;i>0;i--) strdchr(cmd);

	/* find and then execute the command specified in tmp */
	ac = argvize(av,tmp);
	if(ac > 0) {
		if (strequ(av[0],"stop")) return(1);
		for (p=cmdChain;p;p=p->next)
			if (strequ(p->name,av[0])) break;
		if (p) (p->func)(ac,av,p);
		else printf("%s: Command not found.\n",av[0]);
		}
	}
return(0);
}

Optdesc h_opts[] = {
	{"[*|cmd..]","The help command"},
	{0}};

/*************************************************************
*  help(ac,av)
*	the 'help' command
*/
help(ac,av)
int ac;
char *av[];
{
int i,j,namemax,optsmax,descmax,len;
int ln,siz;
CmdRec *p;

namemax = optsmax = descmax = 0;
for (p=cmdChain;p;p=p->next) {
	len = strlen(p->name);
	if (len > namemax) namemax = len;
	if (p->opts) {
		if (p->opts->name) {
			len = strlen(p->opts->name);
			if (len > optsmax) optsmax = len;
			}
		if (p->opts->desc) {
			len = strlen(p->opts->desc);
			if (len > descmax) descmax = len;
			}
		}
	}

if (!atob(&siz,getMonEnv("moresz"),10)) {
	printf("%s: bad moresz value\n",getMonEnv("moresz"));
	return(1);
	}
ioctl_cbreak(0L);

ln = siz;
if (ac >= 2) { /* extended help */
	if (strequ(av[1],"*")) { /* all commands */
		for (p=cmdChain;p;p=p->next) {
			if (prhelp(p,&ln,siz,namemax,optsmax)) break;
			}
		}
	else { /* specific commands */
		for (j=1;j<ac;j++) {
			for (p=cmdChain;p;p=p->next) {
				if (strequ(p->name,av[j])) break;
				}
			if (p) {
				if (prhelp(p,&ln,siz,namemax,optsmax)) break;
				}
			else printf("%s: Command not found\n",av[j]);
			}
		}
	}
else { /* general help only */
	for (p=cmdChain,i=0;p;p=p->next) {
		if (!p->opts) continue;
		printf("%*s  %-*s",namemax,p->name,descmax,p->opts->desc);
		if (i%2 != 0) printf("\n");
		else printf("   ");
		i++;
		}
	if (i%2 != 0) printf("\n");
	}
return(0);
}

/*************************************************************
*  prhelp(n,lnp,siz,namemax,optsmax)
*/
prhelp(p,lnp,siz,namemax,optsmax)
int *lnp,siz,namemax,optsmax;
CmdRec *p;
{
Optdesc *o;
int i;

if (!p->opts) return(0);
sprintf(prnbuf,"%*s  %-*s    %s",namemax,p->name,optsmax, p->opts->name,
					p->opts->desc);
if (more(prnbuf,lnp,siz)) return(1);

o = p->opts;
if (o) {
	for (i=1;o[i].name;i++) {
		sprintf(prnbuf,"%*s  %15s    %s",namemax,"",
					o[i].name,o[i].desc);
		if (more(prnbuf,lnp,siz)) return(1);
		}
	}
return(0);
}

/*************************************************************
*  no_cmd(ac,av)
*/
no_cmd(ac,av)
int ac;
char *av[];
{

printf("The %s command cannot be invoked by name.\n",av[0]);
return(0);
}

/*************************************************************
*  printfb(fmt,a1,a2,a3,a4)
*	A buffered printf used for printing the PMON banner.
*/
printfb(fmt,a1,a2,a3,a4)
char *fmt;
Ulong a1,a2,a3,a4;
{
char tmp[80];
int len,islf;

islf = 0;
sprintf(tmp,fmt,a1,a2,a3,a4);
len = strlen(tmp);
if (len == 0) return(0);

if (!strcmp(fmt,"\n")) islf = 1;

if ((strlen(prnbuf)+len) > 70 || islf) {
	printf("\n");
	*prnbuf = 0;
	}
if (strlen(prnbuf)) strcat(prnbuf," ");
strcat(prnbuf,tmp);
printf("%s ",tmp);
}

/*************************************************************
*  get_rsa(vp,p)
*	Get Register/Symbol/Address
*	This function evaluates expressions on the command line
*	using recursive decent. It understands expressions
*	containing any combination of register names, symbols,
*	constants, perens, and the operators +-* /. In addition
*	it also permits the '^' operator to dereference any
*	address.
*/
get_rsa(vp,p)
unsigned long *vp;
char *p;
{
int r,inbase,inalpha;
unsigned long v1,v2;
char *q,subexpr[LINESZ];

/* strip enclosing parens */
while (*p == '(' && strbalp(p) == p+strlen(p)-1) {
	strdchr(p);
	p[strlen(p)-1] = 0;
	}

if (q=strrpset(p,"+-")) { /* is compound */
	strNcpy(subexpr,p,q-p);
	r = get_rsa(&v1,subexpr);
	if (r == 0) return(r);
	r = get_rsa(&v2,q+1);
	if (r == 0) return(r);
	if (*q == '+') *vp = v1 + v2;
	else *vp = v1 - v2;
	return(1);
	}

if (q=strrpset(p,"*/")) { 
	strNcpy(subexpr,p,q-p);
	r = get_rsa(&v1,subexpr);
	if (r == 0) return(r);
	r = get_rsa(&v2,q+1);
	if (r == 0) return(r);
	if (*q == '*') *vp = v1 * v2;
	else *vp = v1 / v2;
	return(1);
	}

if (*p == '^') {
	r = get_rsa(&v2,p+1);
	if (r == 0) return(r);
	*vp = read_target(XT_MEM,v2,4);
	return(1);
	}

if (*p == '@') {
#ifdef PREGS /* preg */
	if (ispreg(&p[1])) {
		*vp = getPreg(p[1]-'a');
		r = 1;
		}
	else {
		r = getreg(vp,&p[1]);
		if (r == 0) printf("%s: bad register name\n",&p[1]);
		}
#else
	r = getreg(vp,&p[1]);
	if (r == 0) printf("%s: bad register name\n",&p[1]);
#endif
	}
else if (strequ(p,".")) {
	r = getreg(vp,"pc");
	if (r == 0) printf("%s: bad register name\n",&p[1]);
	}
else if (*p == '&') {
	r = sym2adr(vp,&p[1]);
	if (r == 0) printf("%s: bad symbol name\n",&p[1]);
	}
else if (isdigit(*p)) {
	inbase = matchenv("inbase");
	if (inbase == IB_TEN) r = atob(vp,p,10);
	else if (inbase == IB_SIXTEEN) r = atob(vp,p,16);
	else if (inbase == IB_EIGHT) r = atob(vp,p,8);
	else if (inbase == IB_AUTO) r = atob(vp,p,0);
	else {
		printf("%s: bad inbase value\n",getMonEnv("inbase"));
		return(0);
		}
	if (r == 0) {
		r = atob(vp,p,0);
		if (r == 0) printf("%s: bad base %s value\n",
						p,getMonEnv("inbase"));
		}
	}
else if (isxdigit(*p)) {
	inalpha = matchenv("inalpha");
	if (inalpha == IA_HEX) {
		r = atob(vp,p,16);
		if (r == 0) {
			r = sym2adr(vp,p);
			if (r == 0) printf(badhexsym,p);
			}
		}
	else if (inalpha == IA_SYMBOL) {
		r = sym2adr(vp,p);
		if (r == 0) {
			r = atob(vp,p,16);
			if (r == 0) printf(badhexsym,p);
			}
		}
	else {
		printf("%s: bad inalpha value\n",getMonEnv("inalpha"));
		return(0);
		}
	}
else {
	r = sym2adr(vp,p);
	if (r == 0) printf("%s: bad symbol name\n",p);
	}
return(r);
}

/*************************************************************
*  stop(cmdstr)
*/
stop(cmdstr)
char *cmdstr;
{
char cmd[LINESZ];

#ifdef CROSSVIEW
if (xvwmode) longjmp(intrbuf,2);
#endif
if (cmdstr) strcpy(cmd,cmdstr);
else strcpy(cmd,getMonEnv("brkcmd"));
do_cmd(cmd);
longjmp(intrbuf,2);
}

/*************************************************************
*  addCmdRec(p)
*	add a CmdRec to the cmdChain
*/
addCmdRec(p)
CmdRec *p;
{
CmdRec *q;

p->next = 0;
if (!cmdChain) { /* empty */
	cmdChain = p;
	}
else {
	for (q=cmdChain;q->next;q=q->next) ; /* find end of chain */
	q->next = p;
	}
}

/*************************************************************
*  do_vers(ac,av)
*	display version number
*/
do_vers(ac,av)
int ac;
char *av[];
{

if (ac == 1) printf("%s\n",vers);
else printf("%s\n",full_vers_info);
}