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252b5132 | 1 | /* |
5ec4a8f3 NC |
2 | * Copyright (c) 1983, 1993, 2001 |
3 | * The Regents of the University of California. All rights reserved. | |
252b5132 | 4 | * |
5ec4a8f3 NC |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. Neither the name of the University nor the names of its contributors | |
14 | * may be used to endorse or promote products derived from this software | |
15 | * without specific prior written permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
27 | * SUCH DAMAGE. | |
252b5132 RH |
28 | */ |
29 | #include "gprof.h" | |
6d9c411a AM |
30 | #include "search_list.h" |
31 | #include "source.h" | |
32 | #include "symtab.h" | |
252b5132 RH |
33 | #include "cg_arcs.h" |
34 | #include "corefile.h" | |
35 | #include "hist.h" | |
252b5132 RH |
36 | |
37 | /* | |
38 | * opcode of the `callf' instruction | |
39 | */ | |
40 | #define CALLF 0xfe | |
41 | ||
42 | /* | |
43 | * register for pc relative addressing | |
44 | */ | |
45 | #define PC 0xf | |
46 | ||
47 | enum tahoe_opermodes | |
48 | { | |
49 | literal, indexed, reg, regdef, autodec, autoinc, autoincdef, | |
50 | bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef, | |
51 | immediate, absolute, byterel, bytereldef, wordrel, wordreldef, | |
52 | longrel, longreldef | |
53 | }; | |
54 | typedef enum tahoe_opermodes tahoe_operandenum; | |
55 | ||
56 | /* | |
57 | * A symbol to be the child of indirect callf: | |
58 | */ | |
3b04e729 | 59 | static Sym indirectchild; |
252b5132 | 60 | |
3b04e729 RH |
61 | static tahoe_operandenum tahoe_operandmode PARAMS ((unsigned char *)); |
62 | static char *tahoe_operandname PARAMS ((tahoe_operandenum)); | |
63 | static long tahoe_operandlength PARAMS ((unsigned char *)); | |
6d9c411a | 64 | static bfd_signed_vma tahoe_offset PARAMS ((unsigned char *)); |
5789ecea | 65 | void tahoe_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
252b5132 | 66 | |
3b04e729 | 67 | static tahoe_operandenum |
252b5132 RH |
68 | tahoe_operandmode (modep) |
69 | unsigned char *modep; | |
70 | { | |
6d9c411a | 71 | long usesreg = *modep & 0xf; |
252b5132 | 72 | |
6d9c411a | 73 | switch ((*modep >> 4) & 0xf) |
252b5132 RH |
74 | { |
75 | case 0: | |
76 | case 1: | |
77 | case 2: | |
78 | case 3: | |
79 | return literal; | |
80 | case 4: | |
81 | return indexed; | |
82 | case 5: | |
83 | return reg; | |
84 | case 6: | |
85 | return regdef; | |
86 | case 7: | |
87 | return autodec; | |
88 | case 8: | |
89 | return usesreg != 0xe ? autoinc : immediate; | |
90 | case 9: | |
91 | return usesreg != PC ? autoincdef : absolute; | |
92 | case 10: | |
93 | return usesreg != PC ? bytedisp : byterel; | |
94 | case 11: | |
95 | return usesreg != PC ? bytedispdef : bytereldef; | |
96 | case 12: | |
97 | return usesreg != PC ? worddisp : wordrel; | |
98 | case 13: | |
99 | return usesreg != PC ? worddispdef : wordreldef; | |
100 | case 14: | |
101 | return usesreg != PC ? longdisp : longrel; | |
102 | case 15: | |
103 | return usesreg != PC ? longdispdef : longreldef; | |
104 | } | |
105 | /* NOTREACHED */ | |
106 | abort (); | |
107 | } | |
108 | ||
3b04e729 | 109 | static char * |
252b5132 RH |
110 | tahoe_operandname (mode) |
111 | tahoe_operandenum mode; | |
112 | { | |
113 | ||
114 | switch (mode) | |
115 | { | |
116 | case literal: | |
117 | return "literal"; | |
118 | case indexed: | |
119 | return "indexed"; | |
120 | case reg: | |
121 | return "register"; | |
122 | case regdef: | |
123 | return "register deferred"; | |
124 | case autodec: | |
125 | return "autodecrement"; | |
126 | case autoinc: | |
127 | return "autoincrement"; | |
128 | case autoincdef: | |
129 | return "autoincrement deferred"; | |
130 | case bytedisp: | |
131 | return "byte displacement"; | |
132 | case bytedispdef: | |
133 | return "byte displacement deferred"; | |
134 | case byterel: | |
135 | return "byte relative"; | |
136 | case bytereldef: | |
137 | return "byte relative deferred"; | |
138 | case worddisp: | |
139 | return "word displacement"; | |
140 | case worddispdef: | |
141 | return "word displacement deferred"; | |
142 | case wordrel: | |
143 | return "word relative"; | |
144 | case wordreldef: | |
145 | return "word relative deferred"; | |
146 | case immediate: | |
147 | return "immediate"; | |
148 | case absolute: | |
149 | return "absolute"; | |
150 | case longdisp: | |
151 | return "long displacement"; | |
152 | case longdispdef: | |
153 | return "long displacement deferred"; | |
154 | case longrel: | |
155 | return "long relative"; | |
156 | case longreldef: | |
157 | return "long relative deferred"; | |
158 | } | |
159 | /* NOTREACHED */ | |
160 | abort (); | |
161 | } | |
162 | ||
3b04e729 | 163 | static long |
252b5132 RH |
164 | tahoe_operandlength (modep) |
165 | unsigned char *modep; | |
166 | { | |
167 | ||
168 | switch (tahoe_operandmode (modep)) | |
169 | { | |
170 | case literal: | |
171 | case reg: | |
172 | case regdef: | |
173 | case autodec: | |
174 | case autoinc: | |
175 | case autoincdef: | |
176 | return 1; | |
177 | case bytedisp: | |
178 | case bytedispdef: | |
179 | case byterel: | |
180 | case bytereldef: | |
181 | return 2; | |
182 | case worddisp: | |
183 | case worddispdef: | |
184 | case wordrel: | |
185 | case wordreldef: | |
186 | return 3; | |
187 | case immediate: | |
188 | case absolute: | |
189 | case longdisp: | |
190 | case longdispdef: | |
191 | case longrel: | |
192 | case longreldef: | |
193 | return 5; | |
194 | case indexed: | |
195 | return 1 + tahoe_operandlength (modep + 1); | |
196 | } | |
197 | /* NOTREACHED */ | |
198 | abort (); | |
199 | } | |
200 | ||
6d9c411a AM |
201 | static bfd_signed_vma |
202 | tahoe_offset (modep) | |
203 | unsigned char *modep; | |
252b5132 RH |
204 | { |
205 | tahoe_operandenum mode = tahoe_operandmode (modep); | |
252b5132 | 206 | |
6d9c411a | 207 | ++modep; /* skip over the mode */ |
252b5132 RH |
208 | switch (mode) |
209 | { | |
210 | default: | |
211 | fprintf (stderr, "[reladdr] not relative address\n"); | |
6d9c411a | 212 | return 0; |
252b5132 | 213 | case byterel: |
6d9c411a | 214 | return 1 + bfd_get_signed_8 (core_bfd, modep); |
252b5132 | 215 | case wordrel: |
6d9c411a | 216 | return 2 + bfd_get_signed_16 (core_bfd, modep); |
252b5132 | 217 | case longrel: |
6d9c411a | 218 | return 4 + bfd_get_signed_32 (core_bfd, modep); |
252b5132 RH |
219 | } |
220 | } | |
221 | ||
222 | void | |
223 | tahoe_find_call (parent, p_lowpc, p_highpc) | |
224 | Sym *parent; | |
225 | bfd_vma p_lowpc; | |
226 | bfd_vma p_highpc; | |
227 | { | |
228 | unsigned char *instructp; | |
229 | long length; | |
230 | Sym *child; | |
231 | tahoe_operandenum mode; | |
232 | tahoe_operandenum firstmode; | |
6d9c411a | 233 | bfd_vma pc, destpc; |
b34976b6 | 234 | static bfd_boolean inited = FALSE; |
252b5132 RH |
235 | |
236 | if (!inited) | |
237 | { | |
b34976b6 | 238 | inited = TRUE; |
252b5132 RH |
239 | sym_init (&indirectchild); |
240 | indirectchild.cg.prop.fract = 1.0; | |
241 | indirectchild.cg.cyc.head = &indirectchild; | |
242 | } | |
243 | ||
244 | if (core_text_space == 0) | |
245 | { | |
246 | return; | |
247 | } | |
248 | if (p_lowpc < s_lowpc) | |
249 | { | |
250 | p_lowpc = s_lowpc; | |
251 | } | |
252 | if (p_highpc > s_highpc) | |
253 | { | |
254 | p_highpc = s_highpc; | |
255 | } | |
256 | DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n", | |
fdcf7d43 ILT |
257 | parent->name, (unsigned long) p_lowpc, |
258 | (unsigned long) p_highpc)); | |
6d9c411a | 259 | for (pc = p_lowpc; pc < p_highpc; pc += length) |
252b5132 RH |
260 | { |
261 | length = 1; | |
6d9c411a AM |
262 | instructp = ((unsigned char *) core_text_space |
263 | + pc - core_text_sect->vma); | |
264 | if ((*instructp & 0xff) == CALLF) | |
252b5132 RH |
265 | { |
266 | /* | |
267 | * maybe a callf, better check it out. | |
268 | * skip the count of the number of arguments. | |
269 | */ | |
0e69fcbc | 270 | DBG (CALLDEBUG, printf ("[findcall]\t0x%lx:callf", |
6d9c411a | 271 | (unsigned long) pc)); |
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 | */ | |
6d9c411a | 315 | destpc = pc + tahoe_offset (instructp + length); |
252b5132 RH |
316 | if (destpc >= s_lowpc && destpc <= s_highpc) |
317 | { | |
318 | child = sym_lookup (&symtab, destpc); | |
319 | DBG (CALLDEBUG, | |
fdcf7d43 ILT |
320 | printf ("[findcall]\tdestpc 0x%lx", |
321 | (unsigned long) destpc); | |
252b5132 | 322 | printf (" child->name %s", child->name); |
fdcf7d43 ILT |
323 | printf (" child->addr 0x%lx\n", |
324 | (unsigned long) child->addr); | |
252b5132 RH |
325 | ); |
326 | if (child->addr == destpc) | |
327 | { | |
328 | /* | |
329 | * a hit | |
330 | */ | |
331 | arc_add (parent, child, (unsigned long) 0); | |
332 | length += tahoe_operandlength (instructp + length); | |
333 | continue; | |
334 | } | |
335 | goto botched; | |
336 | } | |
337 | /* | |
338 | * else: | |
339 | * it looked like a callf, | |
340 | * but it wasn't to anywhere. | |
341 | */ | |
342 | goto botched; | |
343 | default: | |
344 | botched: | |
345 | /* | |
346 | * something funny going on. | |
347 | */ | |
348 | DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n")); | |
349 | length = 1; | |
350 | continue; | |
351 | } | |
352 | } | |
353 | } | |
354 | } |