1 /*
2  *
3  *	debugger
4  *
5  */
6 #include "defs.h"
7 #include "fns.h"
8 
9 #define ptrace dbptrace
10 
11 extern	int	infile;
12 extern	int	outfile;
13 extern	int	maxpos;
14 
15 /* general printing routines ($) */
16 
17 char	*Ipath = INCDIR;
18 static	int	tracetype;
19 static void	printfp(Map*, int);
20 
21 /*
22  *	callback on stack trace
23  */
24 static int
25 ptrace(Map *map, Regs *regs, ulong pc, ulong nextpc, Symbol *sym, int depth)
26 {
27 	char buf[512];
28 
29 	USED(map);
30 	if(sym){
31 		dprint("%s(", sym->name);
32 		printparams(sym, regs);
33 		dprint(") ");
34 	}else
35 		dprint("%#lux ", pc);
36 	printsource(pc);
37 
38 	dprint(" called from ");
39 	symoff(buf, 512, nextpc, CTEXT);
40 	dprint("%s ", buf);
41 /*	printsource(nextpc); */
42 	dprint("\n");
43 	if(tracetype == 'C' && sym)
44 		printlocals(sym, regs);
45 	return depth<40;
46 }
47 
48 static ulong *adrregvals;
49 
50 static int
51 adrrw(Regs *regs, char *name, ulong *val, int isr)
52 {
53 	int i;
54 
55 	if((i = windindex(name)) == -1)
56 		return correg->rw(correg, name, val, isr);
57 	if(isr){
58 		*val = adrregvals[i];
59 		return 0;
60 	}
61 	werrstr("saved registers are immutable");
62 	return -1;
63 }
64 
65 Regs*
66 adrregs(void)
67 {
68 	int i;
69 	static Regs r;
70 	static u32int x;
71 
72 	if(adrregvals== nil){
73 		adrregvals = malloc(mach->nwindreg*sizeof(adrregvals[0]));
74 		if(adrregvals == nil)
75 			error("%r");
76 	}
77 	for(i=0; i<mach->nwindreg; i++){
78 		if(get4(cormap, adrval+4*i, &x) < 0)
79 			error("%r");
80 		adrregvals[i] = x;
81 	}
82 	r.rw = adrrw;
83 	return &r;
84 }
85 
86 void
87 printdollar(int modif)
88 {
89 	int	i;
90 	u32int u4;
91 	BKPT *bk;
92 	Symbol s;
93 	int	stack;
94 	char	*fname;
95 	char buf[512];
96 	Regs *r;
97 
98 	if (cntflg==0)
99 		cntval = -1;
100 	switch (modif) {
101 
102 	case '<':
103 		if (cntval == 0) {
104 			while (readchar() != EOR)
105 				;
106 			reread();
107 			break;
108 		}
109 		if (rdc() == '<')
110 			stack = 1;
111 		else {
112 			stack = 0;
113 			reread();
114 		}
115 		fname = getfname();
116 		redirin(stack, fname);
117 		break;
118 
119 	case '>':
120 		fname = getfname();
121 		redirout(fname);
122 		break;
123 
124 	case 'a':
125 		attachprocess();
126 		break;
127 
128 	case 'k':
129 		kmsys();
130 		break;
131 
132 	case 'q':
133 	case 'Q':
134 		done();
135 
136 	case 'w':
137 		maxpos=(adrflg?adrval:MAXPOS);
138 		break;
139 
140 	case 'S':
141 		printsym();
142 		break;
143 
144 	case 's':
145 		maxoff=(adrflg?adrval:MAXOFF);
146 		break;
147 
148 	case 'm':
149 		printmap("? map", symmap);
150 		printmap("/ map", cormap);
151 		break;
152 
153 	case 0:
154 	case '?':
155 		if (pid)
156 			dprint("pid = %d\n",pid);
157 		else
158 			prints("no process\n");
159 		flushbuf();
160 
161 	case 'r':
162 	case 'R':
163 		printregs(modif);
164 		return;
165 
166 	case 'f':
167 	case 'F':
168 		printfp(cormap, modif);
169 		return;
170 
171 	case 'c':
172 	case 'C':
173 		tracetype = modif;
174 		if (adrflg)
175 			r = adrregs();
176 		else
177 			r = correg;
178 		if(stacktrace(cormap, correg, ptrace) <= 0)
179 			error("no stack frame");
180 		break;
181 
182 		/*print externals*/
183 	case 'e':
184 		for (i = 0; indexsym(i, &s)>=0; i++) {
185 			if (s.class==CDATA)
186 			if (s.loc.type==LADDR)
187 			if (get4(cormap, s.loc.addr, &u4) > 0)
188 				dprint("%s/%12t%#lux\n", s.name, (ulong)u4);
189 		}
190 		break;
191 
192 		/*print breakpoints*/
193 	case 'b':
194 	case 'B':
195 		for (bk=bkpthead; bk; bk=bk->nxtbkpt)
196 			if (bk->flag) {
197 				symoff(buf, 512, (WORD)bk->loc, CTEXT);
198 				dprint(buf);
199 				if (bk->count != 1)
200 					dprint(",%d", bk->count);
201 				dprint(":%c %s", bk->flag == BKPTTMP ? 'B' : 'b', bk->comm);
202 			}
203 		break;
204 
205 	case 'M':
206 		fname = getfname();
207 		if (machbyname(fname) == 0)
208 			dprint("unknown name\n");;
209 		break;
210 	default:
211 		error("bad `$' command");
212 	}
213 
214 }
215 
216 char *
217 getfname(void)
218 {
219 	static char fname[ARB];
220 	char *p;
221 
222 	if (rdc() == EOR) {
223 		reread();
224 		return (0);
225 	}
226 	p = fname;
227 	do {
228 		*p++ = lastc;
229 		if (p >= &fname[ARB-1])
230 			error("filename too long");
231 	} while (rdc() != EOR);
232 	*p = 0;
233 	reread();
234 	return (fname);
235 }
236 
237 static void
238 printfp(Map *map, int modif)
239 {
240 	Regdesc *rp;
241 	int i;
242 	int ret;
243 	char buf[512];
244 
245 	for (i = 0, rp = mach->reglist; rp->name; rp += ret) {
246 		ret = 1;
247 		if (!(rp->flags&RFLT))
248 			continue;
249 		ret = fpformat(map, rp, buf, sizeof(buf), modif);
250 		if (ret < 0) {
251 			werrstr("Register %s: %r", rp->name);
252 			error("%r");
253 		}
254 			/* double column print */
255 		if (i&0x01)
256 			dprint("%40t%-8s%-12s\n", rp->name, buf);
257 		else
258 			dprint("\t%-8s%-12s", rp->name, buf);
259 		i++;
260 	}
261 }
262 
263 void
264 redirin(int stack, char *file)
265 {
266 	char pfile[ARB];
267 
268 	if (file == 0) {
269 		iclose(-1, 0);
270 		return;
271 	}
272 	iclose(stack, 0);
273 	if ((infile = open(file, 0)) < 0) {
274 		strcpy(pfile, Ipath);
275 		strcat(pfile, "/");
276 		strcat(pfile, file);
277 		if ((infile = open(pfile, 0)) < 0) {
278 			infile = STDIN;
279 			error("cannot open");
280 		}
281 	}
282 }
283 
284 void
285 printmap(char *s, Map *map)
286 {
287 	int i;
288 
289 	if (!map)
290 		return;
291 	if (map == symmap)
292 		dprint("%s%12t`%s'\n", s, symfil==nil ? "-" : symfil);
293 	else if (map == cormap)
294 		dprint("%s%12t`%s'\n", s, corfil==nil ? "-" : corfil);
295 	else
296 		dprint("%s\n", s);
297 	for (i = 0; i < map->nseg; i++) {
298 		dprint("%s%8t%-16#lux %-16#lux %-16#lux %s\n", map->seg[i].name,
299 			map->seg[i].base, map->seg[i].base+map->seg[i].size, map->seg[i].offset,
300 			map->seg[i].file ? map->seg[i].file : "");
301 	}
302 }
303 
304 /*
305  *	dump the raw symbol table
306  */
307 void
308 printsym(void)
309 {
310 	int i;
311 	Symbol *sp, s;
312 
313 	for (i=0; indexsym(i, &s)>=0; i++){
314 		sp = &s;
315 		switch(sp->type) {
316 		case 't':
317 		case 'l':
318 			dprint("%8#lux t %s\n", sp->loc.addr, sp->name);
319 			break;
320 		case 'T':
321 		case 'L':
322 			dprint("%8#lux T %s\n", sp->loc.addr, sp->name);
323 			break;
324 		case 'D':
325 		case 'd':
326 		case 'B':
327 		case 'b':
328 		case 'a':
329 		case 'p':
330 		case 'm':
331 			dprint("%8#lux %c %s\n", sp->loc.addr, sp->type, sp->name);
332 			break;
333 		default:
334 			break;
335 		}
336 	}
337 }
338 
339 #define	STRINGSZ	128
340 
341 /*
342  *	print the value of dot as file:line
343  */
344 void
345 printsource(long dot)
346 {
347 	char str[STRINGSZ];
348 
349 	if (fileline(dot, str, STRINGSZ) >= 0)
350 		dprint("%s", str);
351 }
352 
353 void
354 printpc(void)
355 {
356 	char buf[512];
357 	ulong u;
358 
359 	if(rget(correg, mach->pc, &u) < 0)
360 		error("%r");
361 	dot = u;
362 	if(dot){
363 		printsource((long)dot);
364 		printc(' ');
365 		symoff(buf, sizeof(buf), (long)dot, CTEXT);
366 		dprint("%s/", buf);
367 		if (mach->das(cormap, dot, 'i', buf, sizeof(buf)) < 0)
368 			error("%r");
369 		dprint("%16t%s\n", buf);
370 	}
371 }
372 
373 void
374 printlocals(Symbol *fn, Regs *regs)
375 {
376 	int i;
377 	u32int v;
378 	Symbol s;
379 
380 	for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
381 		if (s.class != CAUTO)
382 			continue;
383 		if(lget4(cormap, correg, s.loc, &v) >= 0)
384 			dprint("%8t%s.%s/%10t%#lux\n", fn->name, s.name, v);
385 		else
386 			dprint("%8t%s.%s/%10t?\n", fn->name, s.name);
387 	}
388 }
389 
390 void
391 printparams(Symbol *fn, Regs *regs)
392 {
393 	int i;
394 	Symbol s;
395 	u32int v;
396 	int first = 0;
397 
398 	for (i = 0; indexlsym(fn, i, &s)>=0; i++) {
399 		if (s.class != CPARAM)
400 			continue;
401 		if (first++)
402 			dprint(", ");
403 		if(lget4(cormap, correg, s.loc, &v) >= 0)
404 			dprint("%s=%#lux", s.name, v);
405 		else
406 			dprint("%s=?", s.name);
407 	}
408 }