1*fae548d3Szrj /*
2*fae548d3Szrj * Copyright (c) 1983, 1993, 2001
3*fae548d3Szrj * The Regents of the University of California. All rights reserved.
4*fae548d3Szrj *
5*fae548d3Szrj * Redistribution and use in source and binary forms, with or without
6*fae548d3Szrj * modification, are permitted provided that the following conditions
7*fae548d3Szrj * are met:
8*fae548d3Szrj * 1. Redistributions of source code must retain the above copyright
9*fae548d3Szrj * notice, this list of conditions and the following disclaimer.
10*fae548d3Szrj * 2. Redistributions in binary form must reproduce the above copyright
11*fae548d3Szrj * notice, this list of conditions and the following disclaimer in the
12*fae548d3Szrj * documentation and/or other materials provided with the distribution.
13*fae548d3Szrj * 3. Neither the name of the University nor the names of its contributors
14*fae548d3Szrj * may be used to endorse or promote products derived from this software
15*fae548d3Szrj * without specific prior written permission.
16*fae548d3Szrj *
17*fae548d3Szrj * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18*fae548d3Szrj * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19*fae548d3Szrj * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20*fae548d3Szrj * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21*fae548d3Szrj * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22*fae548d3Szrj * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23*fae548d3Szrj * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24*fae548d3Szrj * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25*fae548d3Szrj * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26*fae548d3Szrj * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27*fae548d3Szrj * SUCH DAMAGE.
28*fae548d3Szrj */
29*fae548d3Szrj #include "gprof.h"
30*fae548d3Szrj #include "search_list.h"
31*fae548d3Szrj #include "source.h"
32*fae548d3Szrj #include "symtab.h"
33*fae548d3Szrj #include "cg_arcs.h"
34*fae548d3Szrj #include "corefile.h"
35*fae548d3Szrj #include "hist.h"
36*fae548d3Szrj
37*fae548d3Szrj static int i386_iscall (unsigned char *);
38*fae548d3Szrj void i386_find_call (Sym *, bfd_vma, bfd_vma);
39*fae548d3Szrj
40*fae548d3Szrj static int
i386_iscall(unsigned char * ip)41*fae548d3Szrj i386_iscall (unsigned char *ip)
42*fae548d3Szrj {
43*fae548d3Szrj if (*ip == 0xe8)
44*fae548d3Szrj return 1;
45*fae548d3Szrj return 0;
46*fae548d3Szrj }
47*fae548d3Szrj
48*fae548d3Szrj
49*fae548d3Szrj void
i386_find_call(Sym * parent,bfd_vma p_lowpc,bfd_vma p_highpc)50*fae548d3Szrj i386_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
51*fae548d3Szrj {
52*fae548d3Szrj unsigned char *instructp;
53*fae548d3Szrj Sym *child;
54*fae548d3Szrj bfd_vma pc, destpc;
55*fae548d3Szrj
56*fae548d3Szrj DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
57*fae548d3Szrj parent->name, (unsigned long) p_lowpc,
58*fae548d3Szrj (unsigned long) p_highpc));
59*fae548d3Szrj
60*fae548d3Szrj for (pc = p_lowpc; pc < p_highpc; ++pc)
61*fae548d3Szrj {
62*fae548d3Szrj instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
63*fae548d3Szrj if (i386_iscall (instructp))
64*fae548d3Szrj {
65*fae548d3Szrj DBG (CALLDEBUG,
66*fae548d3Szrj printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
67*fae548d3Szrj /*
68*fae548d3Szrj * regular pc relative addressing
69*fae548d3Szrj * check that this is the address of
70*fae548d3Szrj * a function.
71*fae548d3Szrj */
72*fae548d3Szrj
73*fae548d3Szrj destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
74*fae548d3Szrj if (hist_check_address (destpc))
75*fae548d3Szrj {
76*fae548d3Szrj child = sym_lookup (&symtab, destpc);
77*fae548d3Szrj if (child && child->addr == destpc)
78*fae548d3Szrj {
79*fae548d3Szrj /*
80*fae548d3Szrj * a hit
81*fae548d3Szrj */
82*fae548d3Szrj DBG (CALLDEBUG,
83*fae548d3Szrj printf ("\tdestpc 0x%lx (%s)\n",
84*fae548d3Szrj (unsigned long) destpc, child->name));
85*fae548d3Szrj arc_add (parent, child, (unsigned long) 0);
86*fae548d3Szrj instructp += 4; /* call is a 5 byte instruction */
87*fae548d3Szrj continue;
88*fae548d3Szrj }
89*fae548d3Szrj }
90*fae548d3Szrj /*
91*fae548d3Szrj * else:
92*fae548d3Szrj * it looked like a callf, but it:
93*fae548d3Szrj * a) wasn't actually a callf, or
94*fae548d3Szrj * b) didn't point to a known function in the symtab, or
95*fae548d3Szrj * c) something funny is going on.
96*fae548d3Szrj */
97*fae548d3Szrj DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
98*fae548d3Szrj }
99*fae548d3Szrj }
100*fae548d3Szrj }
101