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252b5132 RH |
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 | */ | |
19 | #include "gprof.h" | |
20 | #include "cg_arcs.h" | |
21 | #include "corefile.h" | |
22 | #include "hist.h" | |
23 | #include "symtab.h" | |
24 | ||
25 | ||
26 | int | |
27 | DEFUN (i386_iscall, (ip), unsigned char *ip) | |
28 | { | |
29 | if (*ip == 0xe8) | |
30 | return 1; | |
31 | return 0; | |
32 | } | |
33 | ||
34 | ||
35 | void | |
36 | i386_find_call (parent, p_lowpc, p_highpc) | |
37 | Sym *parent; | |
38 | bfd_vma p_lowpc; | |
39 | bfd_vma p_highpc; | |
40 | { | |
41 | unsigned char *instructp; | |
42 | Sym *child; | |
43 | bfd_vma destpc, delta; | |
44 | ||
45 | if (core_text_space == 0) | |
46 | { | |
47 | return; | |
48 | } | |
49 | if (p_lowpc < s_lowpc) | |
50 | { | |
51 | p_lowpc = s_lowpc; | |
52 | } | |
53 | if (p_highpc > s_highpc) | |
54 | { | |
55 | p_highpc = s_highpc; | |
56 | } | |
57 | DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n", | |
58 | parent->name, p_lowpc, p_highpc)); | |
59 | ||
60 | delta = (bfd_vma) core_text_space - core_text_sect->vma; | |
61 | ||
62 | for (instructp = (unsigned char *) (p_lowpc + delta); | |
63 | instructp < (unsigned char *) (p_highpc + delta); | |
64 | instructp ++) | |
65 | { | |
66 | if (i386_iscall (instructp)) | |
67 | { | |
68 | DBG (CALLDEBUG, | |
69 | printf ("[findcall]\t0x%x:call", | |
70 | instructp - (unsigned char *) delta)); | |
71 | /* | |
72 | * regular pc relative addressing | |
73 | * check that this is the address of | |
74 | * a function. | |
75 | */ | |
76 | ||
77 | destpc = ((bfd_vma) bfd_get_32 (core_bfd, instructp + 1) | |
78 | + (bfd_vma) instructp - (bfd_vma) delta + 5); | |
79 | if (destpc >= s_lowpc && destpc <= s_highpc) | |
80 | { | |
81 | child = sym_lookup (&symtab, destpc); | |
82 | if (child && child->addr == destpc) | |
83 | { | |
84 | /* | |
85 | * a hit | |
86 | */ | |
87 | DBG (CALLDEBUG, | |
88 | printf ("\tdestpc 0x%lx (%s)\n", destpc, child->name)); | |
89 | arc_add (parent, child, (unsigned long) 0); | |
90 | instructp += 4; /* call is a 5 byte instruction */ | |
91 | continue; | |
92 | } | |
93 | } | |
94 | /* | |
95 | * else: | |
96 | * it looked like a callf, but it: | |
97 | * a) wasn't actually a callf, or | |
98 | * b) didn't point to a known function in the symtab, or | |
99 | * c) something funny is going on. | |
100 | */ | |
101 | DBG (CALLDEBUG, printf ("\tbut it's a botch\n")); | |
102 | } | |
103 | } | |
104 | } |