Commit | Line | Data |
---|---|---|
cc5697d7 SEF |
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 | |
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 | */ | |
5489fcc3 KR |
19 | #include "gprof.h" |
20 | #include "cg_arcs.h" | |
21 | #include "core.h" | |
22 | #include "hist.h" | |
23 | #include "symtab.h" | |
cc5697d7 | 24 | |
cc5697d7 | 25 | |
cc5697d7 | 26 | int |
5489fcc3 | 27 | DEFUN(iscall, (ip), unsigned char *ip) |
46f88c11 | 28 | { |
2c89ba26 | 29 | if (*ip == 0xeb || *ip == 0x9a) |
cc5697d7 SEF |
30 | return 1; |
31 | return 0; | |
32 | } | |
33 | ||
5489fcc3 KR |
34 | |
35 | void | |
36 | find_call(parent, p_lowpc, p_highpc) | |
37 | Sym *parent; | |
38 | bfd_vma p_lowpc; | |
39 | bfd_vma p_highpc; | |
cc5697d7 | 40 | { |
5489fcc3 KR |
41 | unsigned char *instructp; |
42 | long length; | |
43 | Sym *child; | |
44 | bfd_vma destpc; | |
cc5697d7 | 45 | |
5489fcc3 | 46 | if (core_text_space == 0) { |
cc5697d7 SEF |
47 | return; |
48 | } | |
5489fcc3 | 49 | if (p_lowpc < s_lowpc) { |
cc5697d7 SEF |
50 | p_lowpc = s_lowpc; |
51 | } | |
5489fcc3 | 52 | if (p_highpc > s_highpc) { |
cc5697d7 SEF |
53 | p_highpc = s_highpc; |
54 | } | |
5489fcc3 KR |
55 | DBG(CALLDEBUG, printf("[findcall] %s: 0x%lx to 0x%lx\n", |
56 | parent->name, p_lowpc, p_highpc)); | |
57 | for ( instructp = (unsigned char*) core_text_space + p_lowpc ; | |
58 | instructp < (unsigned char*) core_text_space + p_highpc ; | |
59 | instructp += length) { | |
cc5697d7 | 60 | length = 1; |
5489fcc3 KR |
61 | if (iscall (instructp)) { |
62 | DBG(CALLDEBUG, | |
63 | printf("[findcall]\t0x%x:callf", | |
64 | instructp - (unsigned char*) core_text_space)); | |
cc5697d7 SEF |
65 | length = 4; |
66 | /* | |
67 | * regular pc relative addressing | |
68 | * check that this is the address of | |
69 | * a function. | |
70 | */ | |
5489fcc3 KR |
71 | destpc = ((bfd_vma)instructp + 5 - (bfd_vma) core_text_space); |
72 | if (destpc >= s_lowpc && destpc <= s_highpc) { | |
73 | child = sym_lookup(&symtab, destpc); | |
74 | DBG(CALLDEBUG, | |
75 | printf("[findcall]\tdestpc 0x%lx", destpc); | |
76 | printf(" child->name %s", child->name); | |
77 | printf(" child->addr 0x%lx\n", child->addr); | |
78 | ); | |
79 | if (child->addr == destpc) { | |
cc5697d7 SEF |
80 | /* |
81 | * a hit | |
82 | */ | |
5489fcc3 | 83 | arc_add(parent, child, (long) 0); |
cc5697d7 SEF |
84 | length += 4; /* constant lengths */ |
85 | continue; | |
86 | } | |
87 | goto botched; | |
88 | } | |
89 | /* | |
90 | * else: | |
91 | * it looked like a callf, | |
92 | * but it wasn't to anywhere. | |
93 | */ | |
94 | botched: | |
95 | /* | |
96 | * something funny going on. | |
97 | */ | |
5489fcc3 KR |
98 | DBG(CALLDEBUG, printf("[findcall]\tbut it's a botch\n")); |
99 | length = 1; | |
100 | continue; | |
cc5697d7 SEF |
101 | } |
102 | } | |
103 | } |