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252b5132 | 1 | /* |
0eee5820 | 2 | * Copyright (c) 1983, 2001 Regents of the University of California. |
252b5132 RH |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that: (1) source distributions retain this entire copyright | |
7 | * notice and comment, and (2) distributions including binaries display | |
8 | * the following acknowledgement: ``This product includes software | |
9 | * developed by the University of California, Berkeley and its contributors'' | |
10 | * in the documentation or other materials provided with the distribution | |
11 | * and in all advertising materials mentioning features or use of this | |
12 | * software. Neither the name of the University nor the names of its | |
13 | * contributors may be used to endorse or promote products derived | |
14 | * from this software without specific prior written permission. | |
15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | */ | |
19 | #include "gprof.h" | |
20 | #include "cg_arcs.h" | |
21 | #include "corefile.h" | |
22 | #include "hist.h" | |
23 | #include "symtab.h" | |
24 | ||
25 | /* | |
26 | * opcode of the `callf' instruction | |
27 | */ | |
28 | #define CALLF 0xfe | |
29 | ||
30 | /* | |
31 | * register for pc relative addressing | |
32 | */ | |
33 | #define PC 0xf | |
34 | ||
35 | enum tahoe_opermodes | |
36 | { | |
37 | literal, indexed, reg, regdef, autodec, autoinc, autoincdef, | |
38 | bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef, | |
39 | immediate, absolute, byterel, bytereldef, wordrel, wordreldef, | |
40 | longrel, longreldef | |
41 | }; | |
42 | typedef enum tahoe_opermodes tahoe_operandenum; | |
43 | ||
44 | /* | |
45 | * A symbol to be the child of indirect callf: | |
46 | */ | |
47 | Sym indirectchild; | |
48 | ||
5789ecea AM |
49 | tahoe_operandenum tahoe_operandmode PARAMS ((unsigned char *)); |
50 | char *tahoe_operandname PARAMS ((tahoe_operandenum)); | |
51 | long tahoe_operandlength PARAMS ((unsigned char *)); | |
52 | bfd_vma tahoe_reladdr PARAMS ((char *)); | |
53 | void tahoe_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); | |
252b5132 RH |
54 | |
55 | tahoe_operandenum | |
56 | tahoe_operandmode (modep) | |
57 | unsigned char *modep; | |
58 | { | |
59 | long usesreg = ((long) *modep) & 0xf; | |
60 | ||
61 | switch (((long) *modep) >> 4) | |
62 | { | |
63 | case 0: | |
64 | case 1: | |
65 | case 2: | |
66 | case 3: | |
67 | return literal; | |
68 | case 4: | |
69 | return indexed; | |
70 | case 5: | |
71 | return reg; | |
72 | case 6: | |
73 | return regdef; | |
74 | case 7: | |
75 | return autodec; | |
76 | case 8: | |
77 | return usesreg != 0xe ? autoinc : immediate; | |
78 | case 9: | |
79 | return usesreg != PC ? autoincdef : absolute; | |
80 | case 10: | |
81 | return usesreg != PC ? bytedisp : byterel; | |
82 | case 11: | |
83 | return usesreg != PC ? bytedispdef : bytereldef; | |
84 | case 12: | |
85 | return usesreg != PC ? worddisp : wordrel; | |
86 | case 13: | |
87 | return usesreg != PC ? worddispdef : wordreldef; | |
88 | case 14: | |
89 | return usesreg != PC ? longdisp : longrel; | |
90 | case 15: | |
91 | return usesreg != PC ? longdispdef : longreldef; | |
92 | } | |
93 | /* NOTREACHED */ | |
94 | abort (); | |
95 | } | |
96 | ||
97 | char * | |
98 | tahoe_operandname (mode) | |
99 | tahoe_operandenum mode; | |
100 | { | |
101 | ||
102 | switch (mode) | |
103 | { | |
104 | case literal: | |
105 | return "literal"; | |
106 | case indexed: | |
107 | return "indexed"; | |
108 | case reg: | |
109 | return "register"; | |
110 | case regdef: | |
111 | return "register deferred"; | |
112 | case autodec: | |
113 | return "autodecrement"; | |
114 | case autoinc: | |
115 | return "autoincrement"; | |
116 | case autoincdef: | |
117 | return "autoincrement deferred"; | |
118 | case bytedisp: | |
119 | return "byte displacement"; | |
120 | case bytedispdef: | |
121 | return "byte displacement deferred"; | |
122 | case byterel: | |
123 | return "byte relative"; | |
124 | case bytereldef: | |
125 | return "byte relative deferred"; | |
126 | case worddisp: | |
127 | return "word displacement"; | |
128 | case worddispdef: | |
129 | return "word displacement deferred"; | |
130 | case wordrel: | |
131 | return "word relative"; | |
132 | case wordreldef: | |
133 | return "word relative deferred"; | |
134 | case immediate: | |
135 | return "immediate"; | |
136 | case absolute: | |
137 | return "absolute"; | |
138 | case longdisp: | |
139 | return "long displacement"; | |
140 | case longdispdef: | |
141 | return "long displacement deferred"; | |
142 | case longrel: | |
143 | return "long relative"; | |
144 | case longreldef: | |
145 | return "long relative deferred"; | |
146 | } | |
147 | /* NOTREACHED */ | |
148 | abort (); | |
149 | } | |
150 | ||
151 | long | |
152 | tahoe_operandlength (modep) | |
153 | unsigned char *modep; | |
154 | { | |
155 | ||
156 | switch (tahoe_operandmode (modep)) | |
157 | { | |
158 | case literal: | |
159 | case reg: | |
160 | case regdef: | |
161 | case autodec: | |
162 | case autoinc: | |
163 | case autoincdef: | |
164 | return 1; | |
165 | case bytedisp: | |
166 | case bytedispdef: | |
167 | case byterel: | |
168 | case bytereldef: | |
169 | return 2; | |
170 | case worddisp: | |
171 | case worddispdef: | |
172 | case wordrel: | |
173 | case wordreldef: | |
174 | return 3; | |
175 | case immediate: | |
176 | case absolute: | |
177 | case longdisp: | |
178 | case longdispdef: | |
179 | case longrel: | |
180 | case longreldef: | |
181 | return 5; | |
182 | case indexed: | |
183 | return 1 + tahoe_operandlength (modep + 1); | |
184 | } | |
185 | /* NOTREACHED */ | |
186 | abort (); | |
187 | } | |
188 | ||
189 | bfd_vma | |
190 | tahoe_reladdr (modep) | |
191 | char *modep; | |
192 | { | |
193 | tahoe_operandenum mode = tahoe_operandmode (modep); | |
194 | char *cp; | |
195 | short *sp; | |
196 | long *lp; | |
197 | int i; | |
198 | long value = 0; | |
199 | ||
200 | cp = modep; | |
201 | ++cp; /* skip over the mode */ | |
202 | switch (mode) | |
203 | { | |
204 | default: | |
205 | fprintf (stderr, "[reladdr] not relative address\n"); | |
206 | return (bfd_vma) modep; | |
207 | case byterel: | |
208 | return (bfd_vma) (cp + sizeof *cp + *cp); | |
209 | case wordrel: | |
210 | for (i = 0; (size_t) i < sizeof *sp; i++) | |
211 | value = (value << 8) + (cp[i] & 0xff); | |
212 | return (bfd_vma) (cp + sizeof *sp + value); | |
213 | case longrel: | |
214 | for (i = 0; (size_t) i < sizeof *lp; i++) | |
215 | value = (value << 8) + (cp[i] & 0xff); | |
216 | return (bfd_vma) (cp + sizeof *lp + value); | |
217 | } | |
218 | } | |
219 | ||
220 | void | |
221 | tahoe_find_call (parent, p_lowpc, p_highpc) | |
222 | Sym *parent; | |
223 | bfd_vma p_lowpc; | |
224 | bfd_vma p_highpc; | |
225 | { | |
226 | unsigned char *instructp; | |
227 | long length; | |
228 | Sym *child; | |
229 | tahoe_operandenum mode; | |
230 | tahoe_operandenum firstmode; | |
231 | bfd_vma destpc; | |
232 | static bool inited = FALSE; | |
233 | ||
234 | if (!inited) | |
235 | { | |
236 | inited = TRUE; | |
237 | sym_init (&indirectchild); | |
238 | indirectchild.cg.prop.fract = 1.0; | |
239 | indirectchild.cg.cyc.head = &indirectchild; | |
240 | } | |
241 | ||
242 | if (core_text_space == 0) | |
243 | { | |
244 | return; | |
245 | } | |
246 | if (p_lowpc < s_lowpc) | |
247 | { | |
248 | p_lowpc = s_lowpc; | |
249 | } | |
250 | if (p_highpc > s_highpc) | |
251 | { | |
252 | p_highpc = s_highpc; | |
253 | } | |
254 | DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n", | |
fdcf7d43 ILT |
255 | parent->name, (unsigned long) p_lowpc, |
256 | (unsigned long) p_highpc)); | |
252b5132 RH |
257 | for (instructp = (unsigned char *) core_text_space + p_lowpc; |
258 | instructp < (unsigned char *) core_text_space + p_highpc; | |
259 | instructp += length) | |
260 | { | |
261 | length = 1; | |
262 | if (*instructp == CALLF) | |
263 | { | |
264 | /* | |
265 | * maybe a callf, better check it out. | |
266 | * skip the count of the number of arguments. | |
267 | */ | |
0e69fcbc ILT |
268 | DBG (CALLDEBUG, printf ("[findcall]\t0x%lx:callf", |
269 | ((unsigned long) | |
270 | (instructp | |
271 | - (unsigned char *) core_text_space)))); | |
252b5132 RH |
272 | firstmode = tahoe_operandmode (instructp + length); |
273 | switch (firstmode) | |
274 | { | |
275 | case literal: | |
276 | case immediate: | |
277 | break; | |
278 | default: | |
279 | goto botched; | |
280 | } | |
281 | length += tahoe_operandlength (instructp + length); | |
282 | mode = tahoe_operandmode (instructp + length); | |
283 | DBG (CALLDEBUG, | |
284 | printf ("\tfirst operand is %s", tahoe_operandname (firstmode)); | |
285 | printf ("\tsecond operand is %s\n", tahoe_operandname (mode)); | |
286 | ); | |
287 | switch (mode) | |
288 | { | |
289 | case regdef: | |
290 | case bytedispdef: | |
291 | case worddispdef: | |
292 | case longdispdef: | |
293 | case bytereldef: | |
294 | case wordreldef: | |
295 | case longreldef: | |
296 | /* | |
297 | * indirect call: call through pointer | |
298 | * either *d(r) as a parameter or local | |
299 | * (r) as a return value | |
300 | * *f as a global pointer | |
301 | * [are there others that we miss?, | |
302 | * e.g. arrays of pointers to functions???] | |
303 | */ | |
304 | arc_add (parent, &indirectchild, (unsigned long) 0); | |
305 | length += tahoe_operandlength (instructp + length); | |
306 | continue; | |
307 | case byterel: | |
308 | case wordrel: | |
309 | case longrel: | |
310 | /* | |
311 | * regular pc relative addressing | |
0eee5820 | 312 | * check that this is the address of |
252b5132 RH |
313 | * a function. |
314 | */ | |
315 | destpc = tahoe_reladdr (instructp + length) | |
316 | - (bfd_vma) core_text_space; | |
317 | if (destpc >= s_lowpc && destpc <= s_highpc) | |
318 | { | |
319 | child = sym_lookup (&symtab, destpc); | |
320 | DBG (CALLDEBUG, | |
fdcf7d43 ILT |
321 | printf ("[findcall]\tdestpc 0x%lx", |
322 | (unsigned long) destpc); | |
252b5132 | 323 | printf (" child->name %s", child->name); |
fdcf7d43 ILT |
324 | printf (" child->addr 0x%lx\n", |
325 | (unsigned long) child->addr); | |
252b5132 RH |
326 | ); |
327 | if (child->addr == destpc) | |
328 | { | |
329 | /* | |
330 | * a hit | |
331 | */ | |
332 | arc_add (parent, child, (unsigned long) 0); | |
333 | length += tahoe_operandlength (instructp + length); | |
334 | continue; | |
335 | } | |
336 | goto botched; | |
337 | } | |
338 | /* | |
339 | * else: | |
340 | * it looked like a callf, | |
341 | * but it wasn't to anywhere. | |
342 | */ | |
343 | goto botched; | |
344 | default: | |
345 | botched: | |
346 | /* | |
347 | * something funny going on. | |
348 | */ | |
349 | DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n")); | |
350 | length = 1; | |
351 | continue; | |
352 | } | |
353 | } | |
354 | } | |
355 | } |