1 a84cbb2a 2004-04-19 devnull #include <u.h>
  2 a84cbb2a 2004-04-19 devnull #include <libc.h>
  3 a84cbb2a 2004-04-19 devnull #include <bio.h>
  4 a84cbb2a 2004-04-19 devnull #include <mach.h>
  5 a84cbb2a 2004-04-19 devnull 
  6 a84cbb2a 2004-04-19 devnull int machdebug = 0;
  7 a84cbb2a 2004-04-19 devnull 
  8 a84cbb2a 2004-04-19 devnull Fhdr *fhdrlist;
  9 a84cbb2a 2004-04-19 devnull static Fhdr *last;
 10 a84cbb2a 2004-04-19 devnull 
 11 a84cbb2a 2004-04-19 devnull static void
 12 a84cbb2a 2004-04-19 devnull relocsym(Symbol *dst, Symbol *src, ulong base)
 13 a84cbb2a 2004-04-19 devnull {
 14 a84cbb2a 2004-04-19 devnull 	if(dst != src)
 15 a84cbb2a 2004-04-19 devnull 		*dst = *src;
 16 a84cbb2a 2004-04-19 devnull 	if(dst->loc.type == LADDR)
 17 a84cbb2a 2004-04-19 devnull 		dst->loc.addr += base;
 18 a84cbb2a 2004-04-19 devnull 	if(dst->hiloc.type == LADDR)
 19 a84cbb2a 2004-04-19 devnull 		dst->hiloc.addr += base;
 20 a84cbb2a 2004-04-19 devnull }
 21 a84cbb2a 2004-04-19 devnull 
 22 a84cbb2a 2004-04-19 devnull void
 23 a84cbb2a 2004-04-19 devnull _addhdr(Fhdr *h)
 24 a84cbb2a 2004-04-19 devnull {
 25 a84cbb2a 2004-04-19 devnull 	h->next = nil;
 26 a84cbb2a 2004-04-19 devnull 	if(fhdrlist == nil){
 27 a84cbb2a 2004-04-19 devnull 		fhdrlist = h;
 28 a84cbb2a 2004-04-19 devnull 		last = h;
 29 a84cbb2a 2004-04-19 devnull 	}else{
 30 a84cbb2a 2004-04-19 devnull 		last->next = h;
 31 a84cbb2a 2004-04-19 devnull 		last = h;
 32 a84cbb2a 2004-04-19 devnull 	}
 33 a84cbb2a 2004-04-19 devnull }
 34 a84cbb2a 2004-04-19 devnull 
 35 a84cbb2a 2004-04-19 devnull void
 36 a84cbb2a 2004-04-19 devnull _delhdr(Fhdr *h)
 37 a84cbb2a 2004-04-19 devnull {
 38 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
 39 a84cbb2a 2004-04-19 devnull 
 40 a84cbb2a 2004-04-19 devnull 	if(h == fhdrlist)
 41 a84cbb2a 2004-04-19 devnull 		fhdrlist = h->next;
 42 a84cbb2a 2004-04-19 devnull 	else{
 43 a84cbb2a 2004-04-19 devnull 		for(p=fhdrlist; p && p->next!=h; p=p->next)
 44 a84cbb2a 2004-04-19 devnull 			;
 45 a84cbb2a 2004-04-19 devnull 		if(p)
 46 a84cbb2a 2004-04-19 devnull 			p->next = h->next;
 47 a84cbb2a 2004-04-19 devnull 		if(p->next == nil)
 48 a84cbb2a 2004-04-19 devnull 			last = p;
 49 a84cbb2a 2004-04-19 devnull 	}
 50 a84cbb2a 2004-04-19 devnull 	h->next = nil;
 51 a84cbb2a 2004-04-19 devnull }
 52 a84cbb2a 2004-04-19 devnull 
 53 a84cbb2a 2004-04-19 devnull int
 54 a84cbb2a 2004-04-19 devnull pc2file(ulong pc, char *file, uint nfile, ulong *line)
 55 a84cbb2a 2004-04-19 devnull {
 56 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
 57 a84cbb2a 2004-04-19 devnull 
 58 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next)
 59 a84cbb2a 2004-04-19 devnull 		if(p->pc2file && p->pc2file(p, pc-p->base, file, nfile, line) >= 0)
 60 a84cbb2a 2004-04-19 devnull 			return 0;
 61 a84cbb2a 2004-04-19 devnull 	werrstr("no source file for 0x%lux", pc);
 62 a84cbb2a 2004-04-19 devnull 	return -1;
 63 a84cbb2a 2004-04-19 devnull }
 64 a84cbb2a 2004-04-19 devnull 
 65 a84cbb2a 2004-04-19 devnull int
 66 a84cbb2a 2004-04-19 devnull pc2line(ulong pc, ulong *line)
 67 a84cbb2a 2004-04-19 devnull {
 68 a84cbb2a 2004-04-19 devnull 	char tmp[10];	/* just in case */
 69 a84cbb2a 2004-04-19 devnull 	return pc2file(pc, tmp, sizeof tmp, line);
 70 a84cbb2a 2004-04-19 devnull }
 71 a84cbb2a 2004-04-19 devnull 
 72 a84cbb2a 2004-04-19 devnull int
 73 a84cbb2a 2004-04-19 devnull file2pc(char *file, ulong line, ulong *addr)
 74 a84cbb2a 2004-04-19 devnull {
 75 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
 76 a84cbb2a 2004-04-19 devnull 
 77 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next)
 78 a84cbb2a 2004-04-19 devnull 		if(p->file2pc && p->file2pc(p, file, line, addr) >= 0){
 79 a84cbb2a 2004-04-19 devnull 			*addr += p->base;
 80 a84cbb2a 2004-04-19 devnull 			return 0;
 81 a84cbb2a 2004-04-19 devnull 		}
 82 a84cbb2a 2004-04-19 devnull 	werrstr("no instructions at %s:%lud", file, line);
 83 a84cbb2a 2004-04-19 devnull 	return -1;
 84 a84cbb2a 2004-04-19 devnull }
 85 a84cbb2a 2004-04-19 devnull 
 86 a84cbb2a 2004-04-19 devnull int
 87 a84cbb2a 2004-04-19 devnull line2pc(ulong basepc, ulong line, ulong *pc)
 88 a84cbb2a 2004-04-19 devnull {
 89 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
 90 a84cbb2a 2004-04-19 devnull 
 91 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next)
 92 a84cbb2a 2004-04-19 devnull 		if(p->line2pc && p->line2pc(p, basepc-p->base, line, pc) >= 0){
 93 a84cbb2a 2004-04-19 devnull 			*pc += p->base;
 94 a84cbb2a 2004-04-19 devnull 			return 0;
 95 a84cbb2a 2004-04-19 devnull 		}
 96 a84cbb2a 2004-04-19 devnull 	werrstr("no instructions on line %lud", line);
 97 a84cbb2a 2004-04-19 devnull 	return -1;
 98 a84cbb2a 2004-04-19 devnull }
 99 a84cbb2a 2004-04-19 devnull 
100 a84cbb2a 2004-04-19 devnull int
101 a84cbb2a 2004-04-19 devnull fnbound(ulong pc, ulong *bounds)
102 a84cbb2a 2004-04-19 devnull {
103 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
104 a84cbb2a 2004-04-19 devnull 	Loc l;
105 a84cbb2a 2004-04-19 devnull 	Symbol *s;
106 a84cbb2a 2004-04-19 devnull 
107 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next){
108 a84cbb2a 2004-04-19 devnull 		l = locaddr(pc - p->base);
109 a84cbb2a 2004-04-19 devnull 		if((s = ffindsym(p, l, CANY)) != nil){
110 a84cbb2a 2004-04-19 devnull 			if(s->loc.type != LADDR){
111 a84cbb2a 2004-04-19 devnull 				werrstr("function %s has weird location %L", s->name, s->loc);
112 a84cbb2a 2004-04-19 devnull 				return -1;
113 a84cbb2a 2004-04-19 devnull 			}
114 a84cbb2a 2004-04-19 devnull 			bounds[0] = s->loc.addr + p->base;
115 a84cbb2a 2004-04-19 devnull 			if(s->hiloc.type != LADDR){
116 a84cbb2a 2004-04-19 devnull 				werrstr("can't find upper bound for function %s", s->name);
117 a84cbb2a 2004-04-19 devnull 				return -1;
118 a84cbb2a 2004-04-19 devnull 			}
119 a84cbb2a 2004-04-19 devnull 			bounds[1] = s->hiloc.addr + p->base;
120 a84cbb2a 2004-04-19 devnull 			return 0;
121 a84cbb2a 2004-04-19 devnull 		}
122 a84cbb2a 2004-04-19 devnull 	}
123 a84cbb2a 2004-04-19 devnull 	werrstr("no function contains 0x%lux", pc);
124 a84cbb2a 2004-04-19 devnull 	return -1;
125 a84cbb2a 2004-04-19 devnull }
126 a84cbb2a 2004-04-19 devnull 
127 a84cbb2a 2004-04-19 devnull int
128 a84cbb2a 2004-04-19 devnull fileline(ulong pc, char *a, uint n)
129 a84cbb2a 2004-04-19 devnull {
130 a84cbb2a 2004-04-19 devnull 	ulong line;
131 a84cbb2a 2004-04-19 devnull 
132 a84cbb2a 2004-04-19 devnull 	if(pc2file(pc, a, n, &line) < 0)
133 a84cbb2a 2004-04-19 devnull 		return -1;
134 a84cbb2a 2004-04-19 devnull 	seprint(a+strlen(a), a+n, ":%lud", line);
135 a84cbb2a 2004-04-19 devnull 	return 0;
136 a84cbb2a 2004-04-19 devnull }
137 a84cbb2a 2004-04-19 devnull 
138 a84cbb2a 2004-04-19 devnull Symbol*
139 a84cbb2a 2004-04-19 devnull flookupsym(Fhdr *fhdr, char *name)
140 a84cbb2a 2004-04-19 devnull {
141 a84cbb2a 2004-04-19 devnull 	Symbol **a, *t;
142 a84cbb2a 2004-04-19 devnull 	uint n, m;
143 a84cbb2a 2004-04-19 devnull 	int i;
144 a84cbb2a 2004-04-19 devnull 
145 a84cbb2a 2004-04-19 devnull 	a = fhdr->byname;
146 a84cbb2a 2004-04-19 devnull 	n = fhdr->nsym;
147 a84cbb2a 2004-04-19 devnull 	if(a == nil)
148 a84cbb2a 2004-04-19 devnull 		return nil;
149 a84cbb2a 2004-04-19 devnull 
150 a84cbb2a 2004-04-19 devnull 	while(n > 0){
151 a84cbb2a 2004-04-19 devnull 		m = n/2;
152 a84cbb2a 2004-04-19 devnull 		t = a[m];
153 a84cbb2a 2004-04-19 devnull 		i = strcmp(name, t->name);
154 a84cbb2a 2004-04-19 devnull 		if(i < 0)
155 a84cbb2a 2004-04-19 devnull 			n = m;
156 a84cbb2a 2004-04-19 devnull 		else if(i > 0){
157 a84cbb2a 2004-04-19 devnull 			n -= m+1;
158 a84cbb2a 2004-04-19 devnull 			a += m+1;
159 a84cbb2a 2004-04-19 devnull 		}else{
160 a84cbb2a 2004-04-19 devnull 			/* found! */
161 a84cbb2a 2004-04-19 devnull 			m += a - fhdr->byname;
162 a84cbb2a 2004-04-19 devnull 			a = fhdr->byname;
163 a84cbb2a 2004-04-19 devnull 			assert(strcmp(name, a[m]->name) == 0);
164 a84cbb2a 2004-04-19 devnull 			while(m > 0 && strcmp(name, a[m-1]->name) == 0)
165 a84cbb2a 2004-04-19 devnull 				m--;
166 a84cbb2a 2004-04-19 devnull 			return a[m];
167 a84cbb2a 2004-04-19 devnull 		}
168 a84cbb2a 2004-04-19 devnull 	}
169 a84cbb2a 2004-04-19 devnull 	return nil;
170 a84cbb2a 2004-04-19 devnull }
171 a84cbb2a 2004-04-19 devnull 
172 a84cbb2a 2004-04-19 devnull int
173 a84cbb2a 2004-04-19 devnull lookupsym(char *fn, char *var, Symbol *s)
174 a84cbb2a 2004-04-19 devnull {
175 a84cbb2a 2004-04-19 devnull 	Symbol *t, s1;
176 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
177 a84cbb2a 2004-04-19 devnull 	char *nam;
178 a84cbb2a 2004-04-19 devnull 
179 a84cbb2a 2004-04-19 devnull 	nam = fn ? fn : var;
180 a84cbb2a 2004-04-19 devnull 	if(nam == nil)
181 a84cbb2a 2004-04-19 devnull 		return -1;
182 a84cbb2a 2004-04-19 devnull 	t = nil;
183 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next)
184 a84cbb2a 2004-04-19 devnull 		if((t=flookupsym(p, nam)) != nil){
185 a84cbb2a 2004-04-19 devnull 			relocsym(&s1, t, p->base);
186 a84cbb2a 2004-04-19 devnull 			break;
187 a84cbb2a 2004-04-19 devnull 		}
188 a84cbb2a 2004-04-19 devnull 	if(t == nil)
189 a84cbb2a 2004-04-19 devnull 		goto err;
190 a84cbb2a 2004-04-19 devnull 	if(fn && var)
191 a84cbb2a 2004-04-19 devnull 		return lookuplsym(&s1, var, s);
192 a84cbb2a 2004-04-19 devnull 	*s = s1;
193 a84cbb2a 2004-04-19 devnull 	return 0;
194 a84cbb2a 2004-04-19 devnull 
195 a84cbb2a 2004-04-19 devnull err:
196 a84cbb2a 2004-04-19 devnull 	werrstr("unknown symbol %s%s%s", fn ? fn : "",
197 a84cbb2a 2004-04-19 devnull 		fn && var ? ":" : "", var ? var : "");
198 a84cbb2a 2004-04-19 devnull 	return -1;
199 a84cbb2a 2004-04-19 devnull }
200 a84cbb2a 2004-04-19 devnull 
201 a84cbb2a 2004-04-19 devnull int
202 a84cbb2a 2004-04-19 devnull findexsym(Fhdr *fp, uint i, Symbol *s)
203 a84cbb2a 2004-04-19 devnull {
204 a84cbb2a 2004-04-19 devnull 	if(i >= fp->nsym)
205 a84cbb2a 2004-04-19 devnull 		return -1;
206 a84cbb2a 2004-04-19 devnull 	relocsym(s, &fp->sym[i], fp->base);
207 a84cbb2a 2004-04-19 devnull 	return 0;
208 a84cbb2a 2004-04-19 devnull }
209 a84cbb2a 2004-04-19 devnull 
210 a84cbb2a 2004-04-19 devnull int
211 a84cbb2a 2004-04-19 devnull indexsym(uint ndx, Symbol *s)
212 a84cbb2a 2004-04-19 devnull {
213 a84cbb2a 2004-04-19 devnull 	uint t;
214 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
215 a84cbb2a 2004-04-19 devnull 
216 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next){
217 a84cbb2a 2004-04-19 devnull 		t = p->nsym;
218 a84cbb2a 2004-04-19 devnull 		if(t < ndx)
219 a84cbb2a 2004-04-19 devnull 			ndx -= t;
220 a84cbb2a 2004-04-19 devnull 		else{
221 a84cbb2a 2004-04-19 devnull 			relocsym(s, &p->sym[ndx], p->base);
222 a84cbb2a 2004-04-19 devnull 			return 0;
223 a84cbb2a 2004-04-19 devnull 		}
224 a84cbb2a 2004-04-19 devnull 	}
225 a84cbb2a 2004-04-19 devnull 	return -1;
226 a84cbb2a 2004-04-19 devnull }
227 a84cbb2a 2004-04-19 devnull 
228 a84cbb2a 2004-04-19 devnull Symbol*
229 a84cbb2a 2004-04-19 devnull ffindsym(Fhdr *fhdr, Loc loc, uint class)
230 a84cbb2a 2004-04-19 devnull {
231 a84cbb2a 2004-04-19 devnull 	Symbol *a, *t;
232 a84cbb2a 2004-04-19 devnull 	int n, i, hi, lo;
233 a84cbb2a 2004-04-19 devnull 	int cmp;
234 a84cbb2a 2004-04-19 devnull 
235 a84cbb2a 2004-04-19 devnull 	a = fhdr->sym;
236 a84cbb2a 2004-04-19 devnull 	n = fhdr->nsym;
237 a84cbb2a 2004-04-19 devnull 	if(a == nil || n <= 0)
238 a84cbb2a 2004-04-19 devnull 		return nil;
239 a84cbb2a 2004-04-19 devnull 
240 a84cbb2a 2004-04-19 devnull 	/*
241 a84cbb2a 2004-04-19 devnull 	 * We have a list of possibly duplicate locations in a.
242 a84cbb2a 2004-04-19 devnull 	 * We want to find the largest index i such that
243 a84cbb2a 2004-04-19 devnull 	 * a[i] <= loc.  This cannot be done with a simple
244 a84cbb2a 2004-04-19 devnull 	 * binary search.  Instead we binary search to find
245 a84cbb2a 2004-04-19 devnull 	 * where the location should be. 
246 a84cbb2a 2004-04-19 devnull 	 */
247 a84cbb2a 2004-04-19 devnull 	lo = 0;
248 a84cbb2a 2004-04-19 devnull 	hi = n;
249 a84cbb2a 2004-04-19 devnull 	while(lo < hi){
250 a84cbb2a 2004-04-19 devnull 		i = (lo+hi)/2;
251 a84cbb2a 2004-04-19 devnull 		cmp = loccmp(&loc, &a[i].loc);
252 a84cbb2a 2004-04-19 devnull 		if(cmp < 0)	/* loc < a[i].loc */
253 a84cbb2a 2004-04-19 devnull 			hi = i;
254 a84cbb2a 2004-04-19 devnull 		if(cmp > 0)	/* loc > a[i].loc */
255 a84cbb2a 2004-04-19 devnull 			lo = i+1;
256 a84cbb2a 2004-04-19 devnull 		if(cmp == 0)
257 a84cbb2a 2004-04-19 devnull 			goto found;
258 a84cbb2a 2004-04-19 devnull 	}
259 a84cbb2a 2004-04-19 devnull 
260 a84cbb2a 2004-04-19 devnull 	/* found position where value would go, but not there -- go back one */
261 a84cbb2a 2004-04-19 devnull 	if(lo == 0)
262 a84cbb2a 2004-04-19 devnull 		return nil;
263 a84cbb2a 2004-04-19 devnull 	i = lo-1;
264 a84cbb2a 2004-04-19 devnull 
265 a84cbb2a 2004-04-19 devnull found:
266 a84cbb2a 2004-04-19 devnull 	/*
267 a84cbb2a 2004-04-19 devnull 	 * might be in a run of all-the-same -- go back to beginning of run.
268 a84cbb2a 2004-04-19 devnull 	 * if runs were long, could binary search for a[i].loc instead.
269 a84cbb2a 2004-04-19 devnull 	 */
270 a84cbb2a 2004-04-19 devnull 	while(i > 0 && loccmp(&a[i-1].loc, &a[i].loc) == 0)
271 a84cbb2a 2004-04-19 devnull 		i--;
272 a84cbb2a 2004-04-19 devnull 
273 a84cbb2a 2004-04-19 devnull 	t = &a[i];
274 a84cbb2a 2004-04-19 devnull 	if(t->hiloc.type && loccmp(&loc, &t->hiloc) >= 0)
275 a84cbb2a 2004-04-19 devnull 		return nil;
276 a84cbb2a 2004-04-19 devnull 	if(class != CANY && class != t->class)
277 a84cbb2a 2004-04-19 devnull 		return nil;
278 a84cbb2a 2004-04-19 devnull 	return t;
279 a84cbb2a 2004-04-19 devnull }
280 a84cbb2a 2004-04-19 devnull 
281 a84cbb2a 2004-04-19 devnull int
282 a84cbb2a 2004-04-19 devnull findsym(Loc loc, uint class, Symbol *s)
283 a84cbb2a 2004-04-19 devnull {
284 a84cbb2a 2004-04-19 devnull 	Fhdr *p, *bestp;
285 a84cbb2a 2004-04-19 devnull 	Symbol *t, *best;
286 a84cbb2a 2004-04-19 devnull 	long bestd, d;
287 a84cbb2a 2004-04-19 devnull 	Loc l;
288 a84cbb2a 2004-04-19 devnull 
289 a84cbb2a 2004-04-19 devnull 	l = loc;
290 a84cbb2a 2004-04-19 devnull 	best = nil;
291 a84cbb2a 2004-04-19 devnull 	bestp = nil;
292 a84cbb2a 2004-04-19 devnull 	bestd = 0;
293 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next){
294 a84cbb2a 2004-04-19 devnull 		if(l.type == LADDR)
295 a84cbb2a 2004-04-19 devnull 			l.addr = loc.addr - p->base;
296 a84cbb2a 2004-04-19 devnull 		if((t = ffindsym(p, l, CANY)) != nil){
297 a84cbb2a 2004-04-19 devnull 			d = l.addr - t->loc.addr;
298 62c277ef 2004-04-20 devnull 			if(0 <= d && d < 4096)
299 a84cbb2a 2004-04-19 devnull 			if(best == nil || d < bestd){
300 a84cbb2a 2004-04-19 devnull 				best = t;
301 a84cbb2a 2004-04-19 devnull 				bestp = p;
302 a84cbb2a 2004-04-19 devnull 				bestd = d;
303 a84cbb2a 2004-04-19 devnull 			}
304 a84cbb2a 2004-04-19 devnull 		}
305 a84cbb2a 2004-04-19 devnull 	}
306 a84cbb2a 2004-04-19 devnull 	if(best){
307 a84cbb2a 2004-04-19 devnull 		if(class != CANY && class != best->class)
308 a84cbb2a 2004-04-19 devnull 			goto err;
309 a84cbb2a 2004-04-19 devnull 		relocsym(s, best, bestp->base);
310 a84cbb2a 2004-04-19 devnull 		return 0;
311 a84cbb2a 2004-04-19 devnull 	}
312 a84cbb2a 2004-04-19 devnull err:
313 a84cbb2a 2004-04-19 devnull 	werrstr("could not find symbol at %L", loc);
314 a84cbb2a 2004-04-19 devnull 	return -1;
315 a84cbb2a 2004-04-19 devnull }
316 a84cbb2a 2004-04-19 devnull 
317 a84cbb2a 2004-04-19 devnull int
318 a84cbb2a 2004-04-19 devnull lookuplsym(Symbol *s1, char *name, Symbol *s2)
319 a84cbb2a 2004-04-19 devnull {
320 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
321 a84cbb2a 2004-04-19 devnull 
322 a84cbb2a 2004-04-19 devnull 	p = s1->fhdr;
323 a84cbb2a 2004-04-19 devnull 	if(p->lookuplsym && p->lookuplsym(p, s1, name, s2) >= 0){
324 a84cbb2a 2004-04-19 devnull 		relocsym(s2, s2, p->base);
325 a84cbb2a 2004-04-19 devnull 		return 0;
326 a84cbb2a 2004-04-19 devnull 	}
327 a84cbb2a 2004-04-19 devnull 	return -1;
328 a84cbb2a 2004-04-19 devnull }
329 a84cbb2a 2004-04-19 devnull 
330 a84cbb2a 2004-04-19 devnull int
331 a84cbb2a 2004-04-19 devnull indexlsym(Symbol *s1, uint ndx, Symbol *s2)
332 a84cbb2a 2004-04-19 devnull {
333 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
334 a84cbb2a 2004-04-19 devnull 
335 a84cbb2a 2004-04-19 devnull 	p = s1->fhdr;
336 a84cbb2a 2004-04-19 devnull 	if(p->indexlsym && p->indexlsym(p, s1, ndx, s2) >= 0){
337 a84cbb2a 2004-04-19 devnull 		relocsym(s2, s2, p->base);
338 a84cbb2a 2004-04-19 devnull 		return 0;
339 a84cbb2a 2004-04-19 devnull 	}
340 a84cbb2a 2004-04-19 devnull 	return -1;
341 a84cbb2a 2004-04-19 devnull }
342 a84cbb2a 2004-04-19 devnull 
343 a84cbb2a 2004-04-19 devnull int
344 a84cbb2a 2004-04-19 devnull findlsym(Symbol *s1, Loc loc, Symbol *s2)
345 a84cbb2a 2004-04-19 devnull {
346 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
347 a84cbb2a 2004-04-19 devnull 
348 a84cbb2a 2004-04-19 devnull 	p = s1->fhdr;
349 a84cbb2a 2004-04-19 devnull 	if(p->findlsym && p->findlsym(p, s1, loc, s2) >= 0){
350 a84cbb2a 2004-04-19 devnull 		relocsym(s2, s2, p->base);
351 a84cbb2a 2004-04-19 devnull 		return 0;
352 a84cbb2a 2004-04-19 devnull 	}
353 a84cbb2a 2004-04-19 devnull 	return -1;
354 a84cbb2a 2004-04-19 devnull }
355 a84cbb2a 2004-04-19 devnull 
356 a84cbb2a 2004-04-19 devnull int
357 a84cbb2a 2004-04-19 devnull unwindframe(Map *map, Regs *regs, ulong *next)
358 a84cbb2a 2004-04-19 devnull {
359 a84cbb2a 2004-04-19 devnull 	Fhdr *p;
360 a84cbb2a 2004-04-19 devnull 
361 a84cbb2a 2004-04-19 devnull 	for(p=fhdrlist; p; p=p->next)
362 a84cbb2a 2004-04-19 devnull 		if(p->unwind && p->unwind(p, map, regs, next) >= 0)
363 a84cbb2a 2004-04-19 devnull 			return 0;
364 a84cbb2a 2004-04-19 devnull 	if(mach->unwind && mach->unwind(map, regs, next) >= 0)
365 a84cbb2a 2004-04-19 devnull 		return 0;
366 a84cbb2a 2004-04-19 devnull 	return -1;
367 a84cbb2a 2004-04-19 devnull }
368 a84cbb2a 2004-04-19 devnull 
369 a84cbb2a 2004-04-19 devnull int
370 a84cbb2a 2004-04-19 devnull symoff(char *a, uint n, ulong addr, uint class)
371 a84cbb2a 2004-04-19 devnull {
372 a84cbb2a 2004-04-19 devnull 	Loc l;
373 a84cbb2a 2004-04-19 devnull 	Symbol s;
374 a84cbb2a 2004-04-19 devnull 
375 a84cbb2a 2004-04-19 devnull 	l.type = LADDR;
376 a84cbb2a 2004-04-19 devnull 	l.addr = addr;
377 a84cbb2a 2004-04-19 devnull 	if(findsym(l, class, &s) < 0 || addr-s.loc.addr >= 4096){
378 a84cbb2a 2004-04-19 devnull 		snprint(a, n, "%lux", addr);
379 a84cbb2a 2004-04-19 devnull 		return -1;
380 a84cbb2a 2004-04-19 devnull 	}
381 a84cbb2a 2004-04-19 devnull 	if(addr != s.loc.addr)
382 a84cbb2a 2004-04-19 devnull 		snprint(a, n, "%s+%ld", s.name, addr-s.loc.addr);
383 a84cbb2a 2004-04-19 devnull 	else
384 a84cbb2a 2004-04-19 devnull 		snprint(a, n, "%s", s.name);
385 a84cbb2a 2004-04-19 devnull 	return 0;
386 a84cbb2a 2004-04-19 devnull }
387 a84cbb2a 2004-04-19 devnull 
388 a84cbb2a 2004-04-19 devnull /* location, class, name */
389 a84cbb2a 2004-04-19 devnull static int
390 a84cbb2a 2004-04-19 devnull byloccmp(const void *va, const void *vb)
391 a84cbb2a 2004-04-19 devnull {
392 a84cbb2a 2004-04-19 devnull 	int i;
393 a84cbb2a 2004-04-19 devnull 	Symbol *a, *b;
394 a84cbb2a 2004-04-19 devnull 
395 a84cbb2a 2004-04-19 devnull 	a = (Symbol*)va;
396 a84cbb2a 2004-04-19 devnull 	b = (Symbol*)vb;
397 a84cbb2a 2004-04-19 devnull 	i = loccmp(&a->loc, &b->loc);
398 a84cbb2a 2004-04-19 devnull 	if(i != 0)
399 a84cbb2a 2004-04-19 devnull 		return i;
400 a84cbb2a 2004-04-19 devnull 	i = a->class - b->class;
401 a84cbb2a 2004-04-19 devnull 	if(i != 0)
402 a84cbb2a 2004-04-19 devnull 		return i;
403 a84cbb2a 2004-04-19 devnull 	return strcmp(a->name, b->name);
404 a84cbb2a 2004-04-19 devnull }
405 a84cbb2a 2004-04-19 devnull 
406 a84cbb2a 2004-04-19 devnull /* name, location, class */
407 a84cbb2a 2004-04-19 devnull static int
408 a84cbb2a 2004-04-19 devnull bynamecmp(const void *va, const void *vb)
409 a84cbb2a 2004-04-19 devnull {
410 a84cbb2a 2004-04-19 devnull 	int i;
411 a84cbb2a 2004-04-19 devnull 	Symbol *a, *b;
412 a84cbb2a 2004-04-19 devnull 
413 a84cbb2a 2004-04-19 devnull 	a = *(Symbol**)va;
414 a84cbb2a 2004-04-19 devnull 	b = *(Symbol**)vb;
415 a84cbb2a 2004-04-19 devnull 	i = strcmp(a->name, b->name);
416 a84cbb2a 2004-04-19 devnull 	if(i != 0)
417 a84cbb2a 2004-04-19 devnull 		return i;
418 a84cbb2a 2004-04-19 devnull 	i = loccmp(&a->loc, &b->loc);
419 a84cbb2a 2004-04-19 devnull 	if(i != 0)
420 a84cbb2a 2004-04-19 devnull 		return i;
421 a84cbb2a 2004-04-19 devnull 	return a->class - b->class;
422 a84cbb2a 2004-04-19 devnull }
423 a84cbb2a 2004-04-19 devnull 
424 a84cbb2a 2004-04-19 devnull int
425 a84cbb2a 2004-04-19 devnull syminit(Fhdr *hdr)
426 a84cbb2a 2004-04-19 devnull {
427 a84cbb2a 2004-04-19 devnull 	int i;
428 a84cbb2a 2004-04-19 devnull 	Symbol *r, *w, *es;
429 a84cbb2a 2004-04-19 devnull 
430 a8763864 2004-07-09 devnull 	if(hdr->syminit == 0){
431 a84cbb2a 2004-04-19 devnull 		werrstr("no debugging symbols");
432 a84cbb2a 2004-04-19 devnull 		return -1;
433 a84cbb2a 2004-04-19 devnull 	}
434 a84cbb2a 2004-04-19 devnull 	if(hdr->syminit(hdr) < 0)
435 a84cbb2a 2004-04-19 devnull 		return -1;
436 a84cbb2a 2004-04-19 devnull 
437 a84cbb2a 2004-04-19 devnull 	qsort(hdr->sym, hdr->nsym, sizeof(hdr->sym[0]), byloccmp);
438 a84cbb2a 2004-04-19 devnull 	es = hdr->sym+hdr->nsym;
439 a84cbb2a 2004-04-19 devnull 	for(r=w=hdr->sym; r<es; r++){
440 a84cbb2a 2004-04-19 devnull 		if(w > hdr->sym
441 a84cbb2a 2004-04-19 devnull 		&& strcmp((w-1)->name, r->name) ==0
442 a84cbb2a 2004-04-19 devnull 		&& loccmp(&(w-1)->loc, &r->loc) == 0){
443 a84cbb2a 2004-04-19 devnull 			/* skip it */
444 a84cbb2a 2004-04-19 devnull 		}else
445 a84cbb2a 2004-04-19 devnull 			*w++ = *r;
446 a84cbb2a 2004-04-19 devnull 	}
447 a84cbb2a 2004-04-19 devnull 	hdr->nsym = w - hdr->sym;
448 a84cbb2a 2004-04-19 devnull 
449 a84cbb2a 2004-04-19 devnull 	hdr->byname = malloc(hdr->nsym*sizeof(hdr->byname[0]));
450 a84cbb2a 2004-04-19 devnull 	if(hdr->byname == nil){
451 a84cbb2a 2004-04-19 devnull 		fprint(2, "could not allocate table to sort by location\n");
452 a84cbb2a 2004-04-19 devnull 	}else{
453 a84cbb2a 2004-04-19 devnull 		for(i=0; i<hdr->nsym; i++)
454 a84cbb2a 2004-04-19 devnull 			hdr->byname[i] = &hdr->sym[i];
455 a84cbb2a 2004-04-19 devnull 		qsort(hdr->byname, hdr->nsym, sizeof(hdr->byname[0]), bynamecmp);
456 a84cbb2a 2004-04-19 devnull 	}
457 a84cbb2a 2004-04-19 devnull 	return 0;
458 a84cbb2a 2004-04-19 devnull }
459 a84cbb2a 2004-04-19 devnull 
460 a84cbb2a 2004-04-19 devnull Symbol*
461 a84cbb2a 2004-04-19 devnull addsym(Fhdr *fp, Symbol *sym)
462 a84cbb2a 2004-04-19 devnull {
463 a84cbb2a 2004-04-19 devnull 	Symbol *s;
464 a84cbb2a 2004-04-19 devnull 
465 a84cbb2a 2004-04-19 devnull 	if(fp->nsym%128 == 0){
466 a84cbb2a 2004-04-19 devnull 		s = realloc(fp->sym, (fp->nsym+128)*sizeof(fp->sym[0]));
467 a84cbb2a 2004-04-19 devnull 		if(s == nil)
468 a84cbb2a 2004-04-19 devnull 			return nil;
469 a84cbb2a 2004-04-19 devnull 		fp->sym = s;
470 a84cbb2a 2004-04-19 devnull 	}
471 a84cbb2a 2004-04-19 devnull 	if(machdebug)
472 a84cbb2a 2004-04-19 devnull 		fprint(2, "sym %s %c %L\n", sym->name, sym->type, sym->loc);
473 a84cbb2a 2004-04-19 devnull 	sym->fhdr = fp;
474 a84cbb2a 2004-04-19 devnull 	s = &fp->sym[fp->nsym++];
475 a84cbb2a 2004-04-19 devnull 	*s = *sym;
476 a84cbb2a 2004-04-19 devnull 	return s;
477 a84cbb2a 2004-04-19 devnull }
478 a84cbb2a 2004-04-19 devnull