1*75fd0b74Schristos /*
2*75fd0b74Schristos * Copyright (c) 1983, 1993, 2001
3*75fd0b74Schristos * The Regents of the University of California. All rights reserved.
4*75fd0b74Schristos *
5*75fd0b74Schristos * Redistribution and use in source and binary forms, with or without
6*75fd0b74Schristos * modification, are permitted provided that the following conditions
7*75fd0b74Schristos * are met:
8*75fd0b74Schristos * 1. Redistributions of source code must retain the above copyright
9*75fd0b74Schristos * notice, this list of conditions and the following disclaimer.
10*75fd0b74Schristos * 2. Redistributions in binary form must reproduce the above copyright
11*75fd0b74Schristos * notice, this list of conditions and the following disclaimer in the
12*75fd0b74Schristos * documentation and/or other materials provided with the distribution.
13*75fd0b74Schristos * 3. Neither the name of the University nor the names of its contributors
14*75fd0b74Schristos * may be used to endorse or promote products derived from this software
15*75fd0b74Schristos * without specific prior written permission.
16*75fd0b74Schristos *
17*75fd0b74Schristos * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18*75fd0b74Schristos * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19*75fd0b74Schristos * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20*75fd0b74Schristos * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21*75fd0b74Schristos * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22*75fd0b74Schristos * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23*75fd0b74Schristos * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24*75fd0b74Schristos * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25*75fd0b74Schristos * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26*75fd0b74Schristos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27*75fd0b74Schristos * SUCH DAMAGE.
28*75fd0b74Schristos */
29*75fd0b74Schristos #include "gprof.h"
30*75fd0b74Schristos #include "search_list.h"
31*75fd0b74Schristos #include "source.h"
32*75fd0b74Schristos #include "symtab.h"
33*75fd0b74Schristos #include "cg_arcs.h"
34*75fd0b74Schristos #include "corefile.h"
35*75fd0b74Schristos #include "hist.h"
36*75fd0b74Schristos
37*75fd0b74Schristos static int i386_iscall (unsigned char *);
38*75fd0b74Schristos void i386_find_call (Sym *, bfd_vma, bfd_vma);
39*75fd0b74Schristos
40*75fd0b74Schristos static int
i386_iscall(unsigned char * ip)41*75fd0b74Schristos i386_iscall (unsigned char *ip)
42*75fd0b74Schristos {
43*75fd0b74Schristos if (*ip == 0xe8)
44*75fd0b74Schristos return 1;
45*75fd0b74Schristos return 0;
46*75fd0b74Schristos }
47*75fd0b74Schristos
48*75fd0b74Schristos
49*75fd0b74Schristos void
i386_find_call(Sym * parent,bfd_vma p_lowpc,bfd_vma p_highpc)50*75fd0b74Schristos i386_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
51*75fd0b74Schristos {
52*75fd0b74Schristos unsigned char *instructp;
53*75fd0b74Schristos Sym *child;
54*75fd0b74Schristos bfd_vma pc, destpc;
55*75fd0b74Schristos
56*75fd0b74Schristos DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
57*75fd0b74Schristos parent->name, (unsigned long) p_lowpc,
58*75fd0b74Schristos (unsigned long) p_highpc));
59*75fd0b74Schristos
60*75fd0b74Schristos for (pc = p_lowpc; pc < p_highpc; ++pc)
61*75fd0b74Schristos {
62*75fd0b74Schristos instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
63*75fd0b74Schristos if (i386_iscall (instructp))
64*75fd0b74Schristos {
65*75fd0b74Schristos DBG (CALLDEBUG,
66*75fd0b74Schristos printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
67*75fd0b74Schristos /*
68*75fd0b74Schristos * regular pc relative addressing
69*75fd0b74Schristos * check that this is the address of
70*75fd0b74Schristos * a function.
71*75fd0b74Schristos */
72*75fd0b74Schristos
73*75fd0b74Schristos destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
74*75fd0b74Schristos if (hist_check_address (destpc))
75*75fd0b74Schristos {
76*75fd0b74Schristos child = sym_lookup (&symtab, destpc);
77*75fd0b74Schristos if (child && child->addr == destpc)
78*75fd0b74Schristos {
79*75fd0b74Schristos /*
80*75fd0b74Schristos * a hit
81*75fd0b74Schristos */
82*75fd0b74Schristos DBG (CALLDEBUG,
83*75fd0b74Schristos printf ("\tdestpc 0x%lx (%s)\n",
84*75fd0b74Schristos (unsigned long) destpc, child->name));
85*75fd0b74Schristos arc_add (parent, child, (unsigned long) 0);
86*75fd0b74Schristos instructp += 4; /* call is a 5 byte instruction */
87*75fd0b74Schristos continue;
88*75fd0b74Schristos }
89*75fd0b74Schristos }
90*75fd0b74Schristos /*
91*75fd0b74Schristos * else:
92*75fd0b74Schristos * it looked like a callf, but it:
93*75fd0b74Schristos * a) wasn't actually a callf, or
94*75fd0b74Schristos * b) didn't point to a known function in the symtab, or
95*75fd0b74Schristos * c) something funny is going on.
96*75fd0b74Schristos */
97*75fd0b74Schristos DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
98*75fd0b74Schristos }
99*75fd0b74Schristos }
100*75fd0b74Schristos }
101