1 /*
2 * Copyright (c) 1983, 1993, 1998
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29 #include "gprof.h"
30 #include "search_list.h"
31 #include "source.h"
32 #include "symtab.h"
33 #include "cg_arcs.h"
34 #include "corefile.h"
35 #include "hist.h"
36
37 static Sym indirect_child;
38
39 void mips_find_call (Sym *, bfd_vma, bfd_vma);
40
41 void
mips_find_call(Sym * parent,bfd_vma p_lowpc,bfd_vma p_highpc)42 mips_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
43 {
44 bfd_vma pc, dest_pc;
45 unsigned int op;
46 int offset;
47 Sym *child;
48 static bool inited = false;
49
50 if (!inited)
51 {
52 inited = true;
53 sym_init (&indirect_child);
54 indirect_child.name = _("<indirect child>");
55 indirect_child.cg.prop.fract = 1.0;
56 indirect_child.cg.cyc.head = &indirect_child;
57 }
58
59 DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
60 parent->name, (unsigned long) p_lowpc,
61 (unsigned long) p_highpc));
62 p_lowpc = (p_lowpc + 3) & ~3;
63 p_highpc &= ~3;
64 for (pc = p_lowpc; pc < p_highpc; pc += 4)
65 {
66 op = bfd_get_32 (core_bfd, ((unsigned char *)core_text_space
67 + pc - core_text_sect->vma));
68 if ((op & 0xfc000000) == 0x0c000000)
69 {
70 /* This is a "jal" instruction. Check that the destination
71 is the address of a function. */
72 DBG (CALLDEBUG,
73 printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
74 offset = (op & 0x03ffffff) << 2;
75 dest_pc = (pc & ~(bfd_vma) 0xfffffff) | offset;
76 if (hist_check_address (dest_pc))
77 {
78 child = sym_lookup (&symtab, dest_pc);
79 if (child)
80 {
81 DBG (CALLDEBUG,
82 printf (" 0x%lx\t; name=%s, addr=0x%lx",
83 (unsigned long) dest_pc, child->name,
84 (unsigned long) child->addr));
85 if (child->addr == dest_pc)
86 {
87 DBG (CALLDEBUG, printf ("\n"));
88 /* a hit: */
89 arc_add (parent, child, (unsigned long) 0);
90 continue;
91 }
92 }
93 }
94 /* Something funny going on. */
95 DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
96 }
97 else if ((op & 0xfc00f83f) == 0x0000f809)
98 {
99 /* This is a "jalr" instruction (indirect call). */
100 DBG (CALLDEBUG,
101 printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
102 arc_add (parent, &indirect_child, (unsigned long) 0);
103 }
104 }
105 }
106