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ddb85eed KB |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
2124b336 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
ddb85eed KB |
16 | */ |
17 | ||
82a8b820 | 18 | #ifndef lint |
2124b336 | 19 | static char sccsid[] = "@(#)tahoe.c 1.4 (Berkeley) %G%"; |
ddb85eed | 20 | #endif /* not lint */ |
82a8b820 SL |
21 | |
22 | #include "gprof.h" | |
23 | ||
24 | /* | |
25 | * a namelist entry to be the child of indirect callf | |
26 | */ | |
27 | nltype indirectchild = { | |
28 | "(*)" , /* the name */ | |
29 | (unsigned long) 0 , /* the pc entry point */ | |
30 | (unsigned long) 0 , /* entry point aligned to histogram */ | |
31 | (double) 0.0 , /* ticks in this routine */ | |
32 | (double) 0.0 , /* cumulative ticks in children */ | |
33 | (long) 0 , /* how many times called */ | |
34 | (long) 0 , /* how many calls to self */ | |
35 | (double) 1.0 , /* propagation fraction */ | |
36 | (double) 0.0 , /* self propagation time */ | |
37 | (double) 0.0 , /* child propagation time */ | |
38 | (bool) 0 , /* print flag */ | |
39 | (int) 0 , /* index in the graph list */ | |
40 | (int) 0 , /* graph call chain top-sort order */ | |
41 | (int) 0 , /* internal number of cycle on */ | |
42 | (struct nl *) &indirectchild , /* pointer to head of cycle */ | |
43 | (struct nl *) 0 , /* pointer to next member of cycle */ | |
44 | (arctype *) 0 , /* list of caller arcs */ | |
45 | (arctype *) 0 /* list of callee arcs */ | |
46 | }; | |
47 | ||
48 | operandenum | |
49 | operandmode( modep ) | |
50 | unsigned char *modep; | |
51 | { | |
52 | long usesreg = ((long)*modep) & 0xf; | |
53 | ||
54 | switch ( ((long)*modep) >> 4 ) { | |
55 | case 0: | |
56 | case 1: | |
57 | case 2: | |
58 | case 3: | |
59 | return literal; | |
60 | case 4: | |
61 | return indexed; | |
62 | case 5: | |
63 | return reg; | |
64 | case 6: | |
65 | return regdef; | |
66 | case 7: | |
67 | return autodec; | |
68 | case 8: | |
69 | return ( usesreg != 0xe ? autoinc : immediate ); | |
70 | case 9: | |
71 | return ( usesreg != PC ? autoincdef : absolute ); | |
72 | case 10: | |
73 | return ( usesreg != PC ? bytedisp : byterel ); | |
74 | case 11: | |
75 | return ( usesreg != PC ? bytedispdef : bytereldef ); | |
76 | case 12: | |
77 | return ( usesreg != PC ? worddisp : wordrel ); | |
78 | case 13: | |
79 | return ( usesreg != PC ? worddispdef : wordreldef ); | |
80 | case 14: | |
81 | return ( usesreg != PC ? longdisp : longrel ); | |
82 | case 15: | |
83 | return ( usesreg != PC ? longdispdef : longreldef ); | |
84 | } | |
85 | /* NOTREACHED */ | |
86 | } | |
87 | ||
88 | char * | |
89 | operandname( mode ) | |
90 | operandenum mode; | |
91 | { | |
92 | ||
93 | switch ( mode ) { | |
94 | case literal: | |
95 | return "literal"; | |
96 | case indexed: | |
97 | return "indexed"; | |
98 | case reg: | |
99 | return "register"; | |
100 | case regdef: | |
101 | return "register deferred"; | |
102 | case autodec: | |
103 | return "autodecrement"; | |
104 | case autoinc: | |
105 | return "autoincrement"; | |
106 | case autoincdef: | |
107 | return "autoincrement deferred"; | |
108 | case bytedisp: | |
109 | return "byte displacement"; | |
110 | case bytedispdef: | |
111 | return "byte displacement deferred"; | |
112 | case byterel: | |
113 | return "byte relative"; | |
114 | case bytereldef: | |
115 | return "byte relative deferred"; | |
116 | case worddisp: | |
117 | return "word displacement"; | |
118 | case worddispdef: | |
119 | return "word displacement deferred"; | |
120 | case wordrel: | |
121 | return "word relative"; | |
122 | case wordreldef: | |
123 | return "word relative deferred"; | |
124 | case immediate: | |
125 | return "immediate"; | |
126 | case absolute: | |
127 | return "absolute"; | |
128 | case longdisp: | |
129 | return "long displacement"; | |
130 | case longdispdef: | |
131 | return "long displacement deferred"; | |
132 | case longrel: | |
133 | return "long relative"; | |
134 | case longreldef: | |
135 | return "long relative deferred"; | |
136 | } | |
137 | /* NOTREACHED */ | |
138 | } | |
139 | ||
140 | long | |
141 | operandlength( modep ) | |
142 | unsigned char *modep; | |
143 | { | |
144 | ||
145 | switch ( operandmode( modep ) ) { | |
146 | case literal: | |
147 | case reg: | |
148 | case regdef: | |
149 | case autodec: | |
150 | case autoinc: | |
151 | case autoincdef: | |
152 | return 1; | |
153 | case bytedisp: | |
154 | case bytedispdef: | |
155 | case byterel: | |
156 | case bytereldef: | |
157 | return 2; | |
158 | case worddisp: | |
159 | case worddispdef: | |
160 | case wordrel: | |
161 | case wordreldef: | |
162 | return 3; | |
163 | case immediate: | |
164 | case absolute: | |
165 | case longdisp: | |
166 | case longdispdef: | |
167 | case longrel: | |
168 | case longreldef: | |
169 | return 5; | |
170 | case indexed: | |
171 | return 1+operandlength( modep + 1 ); | |
172 | } | |
173 | /* NOTREACHED */ | |
174 | } | |
175 | ||
176 | unsigned long | |
177 | reladdr( modep ) | |
178 | char *modep; | |
179 | { | |
180 | operandenum mode = operandmode( modep ); | |
181 | char *cp; | |
182 | short *sp; | |
183 | long *lp; | |
184 | int i; | |
185 | long value = 0; | |
186 | ||
187 | cp = modep; | |
188 | cp += 1; /* skip over the mode */ | |
189 | switch ( mode ) { | |
190 | default: | |
191 | fprintf( stderr , "[reladdr] not relative address\n" ); | |
192 | return (unsigned long) modep; | |
193 | case byterel: | |
194 | return (unsigned long) ( cp + sizeof *cp + *cp ); | |
195 | case wordrel: | |
196 | for (i = 0; i < sizeof *sp; i++) | |
197 | value = (value << 8) + (cp[i] & 0xff); | |
198 | return (unsigned long) ( cp + sizeof *sp + value ); | |
199 | case longrel: | |
200 | for (i = 0; i < sizeof *lp; i++) | |
201 | value = (value << 8) + (cp[i] & 0xff); | |
202 | return (unsigned long) ( cp + sizeof *lp + value ); | |
203 | } | |
204 | } | |
205 | ||
da50c4dd | 206 | findcall( parentp , p_lowpc , p_highpc ) |
82a8b820 SL |
207 | nltype *parentp; |
208 | unsigned long p_lowpc; | |
209 | unsigned long p_highpc; | |
210 | { | |
211 | unsigned char *instructp; | |
212 | long length; | |
213 | nltype *childp; | |
214 | operandenum mode; | |
215 | operandenum firstmode; | |
216 | unsigned long destpc; | |
217 | ||
218 | if ( textspace == 0 ) { | |
219 | return; | |
220 | } | |
221 | if ( p_lowpc < s_lowpc ) { | |
222 | p_lowpc = s_lowpc; | |
223 | } | |
224 | if ( p_highpc > s_highpc ) { | |
225 | p_highpc = s_highpc; | |
226 | } | |
227 | # ifdef DEBUG | |
228 | if ( debug & CALLDEBUG ) { | |
da50c4dd | 229 | printf( "[findcall] %s: 0x%x to 0x%x\n" , |
82a8b820 SL |
230 | parentp -> name , p_lowpc , p_highpc ); |
231 | } | |
232 | # endif DEBUG | |
233 | for ( instructp = textspace + p_lowpc ; | |
234 | instructp < textspace + p_highpc ; | |
235 | instructp += length ) { | |
236 | length = 1; | |
237 | if ( *instructp == CALLF ) { | |
238 | /* | |
239 | * maybe a callf, better check it out. | |
240 | * skip the count of the number of arguments. | |
241 | */ | |
242 | # ifdef DEBUG | |
243 | if ( debug & CALLDEBUG ) { | |
da50c4dd | 244 | printf( "[findcall]\t0x%x:callf" , instructp - textspace ); |
82a8b820 SL |
245 | } |
246 | # endif DEBUG | |
247 | firstmode = operandmode( instructp+length ); | |
248 | switch ( firstmode ) { | |
249 | case literal: | |
250 | case immediate: | |
251 | break; | |
252 | default: | |
253 | goto botched; | |
254 | } | |
255 | length += operandlength( instructp+length ); | |
256 | mode = operandmode( instructp + length ); | |
257 | # ifdef DEBUG | |
258 | if ( debug & CALLDEBUG ) { | |
259 | printf( "\tfirst operand is %s", operandname( firstmode ) ); | |
260 | printf( "\tsecond operand is %s\n" , operandname( mode ) ); | |
261 | } | |
262 | # endif DEBUG | |
263 | switch ( mode ) { | |
264 | case regdef: | |
265 | case bytedispdef: | |
266 | case worddispdef: | |
267 | case longdispdef: | |
268 | case bytereldef: | |
269 | case wordreldef: | |
270 | case longreldef: | |
271 | /* | |
272 | * indirect call: call through pointer | |
273 | * either *d(r) as a parameter or local | |
274 | * (r) as a return value | |
275 | * *f as a global pointer | |
276 | * [are there others that we miss?, | |
277 | * e.g. arrays of pointers to functions???] | |
278 | */ | |
279 | addarc( parentp , &indirectchild , (long) 0 ); | |
280 | length += operandlength( instructp + length ); | |
281 | continue; | |
282 | case byterel: | |
283 | case wordrel: | |
284 | case longrel: | |
285 | /* | |
286 | * regular pc relative addressing | |
287 | * check that this is the address of | |
288 | * a function. | |
289 | */ | |
290 | destpc = reladdr( instructp+length ) | |
291 | - (unsigned long) textspace; | |
292 | if ( destpc >= s_lowpc && destpc <= s_highpc ) { | |
293 | childp = nllookup( destpc ); | |
294 | # ifdef DEBUG | |
295 | if ( debug & CALLDEBUG ) { | |
da50c4dd | 296 | printf( "[findcall]\tdestpc 0x%x" , destpc ); |
82a8b820 SL |
297 | printf( " childp->name %s" , childp -> name ); |
298 | printf( " childp->value 0x%x\n" , | |
299 | childp -> value ); | |
300 | } | |
301 | # endif DEBUG | |
302 | if ( childp -> value == destpc ) { | |
303 | /* | |
304 | * a hit | |
305 | */ | |
306 | addarc( parentp , childp , (long) 0 ); | |
307 | length += operandlength( instructp + length ); | |
308 | continue; | |
309 | } | |
310 | goto botched; | |
311 | } | |
312 | /* | |
313 | * else: | |
314 | * it looked like a callf, | |
315 | * but it wasn't to anywhere. | |
316 | */ | |
317 | goto botched; | |
318 | default: | |
319 | botched: | |
320 | /* | |
321 | * something funny going on. | |
322 | */ | |
323 | # ifdef DEBUG | |
324 | if ( debug & CALLDEBUG ) { | |
da50c4dd | 325 | printf( "[findcall]\tbut it's a botch\n" ); |
82a8b820 SL |
326 | } |
327 | # endif DEBUG | |
328 | length = 1; | |
329 | continue; | |
330 | } | |
331 | } | |
332 | } | |
333 | } |