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
37static Sym indirect_child;
38
39void mips_find_call (Sym *, bfd_vma, bfd_vma);
40
41void
42mips_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 bfd_boolean 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  for (pc = p_lowpc; pc < p_highpc; pc += 4)
63    {
64      op = bfd_get_32 (core_bfd, ((unsigned char *)core_text_space
65                                 + pc - core_text_sect->vma));
66      if ((op & 0xfc000000) == 0x0c000000)
67	{
68	  /* This is a "jal" instruction.  Check that the destination
69	     is the address of a function.  */
70	  DBG (CALLDEBUG,
71	       printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
72          offset = (op & 0x03ffffff) << 2;
73	  dest_pc = (pc & ~(bfd_vma) 0xfffffff) | offset;
74	  if (hist_check_address (dest_pc))
75	    {
76	      child = sym_lookup (&symtab, dest_pc);
77              if (child)
78		{
79	          DBG (CALLDEBUG,
80		       printf (" 0x%lx\t; name=%s, addr=0x%lx",
81			       (unsigned long) dest_pc, child->name,
82			       (unsigned long) child->addr));
83	          if (child->addr == dest_pc)
84		    {
85		      DBG (CALLDEBUG, printf ("\n"));
86		      /* a hit:  */
87		      arc_add (parent, child, (unsigned long) 0);
88		      continue;
89		    }
90		}
91	    }
92	  /* Something funny going on.  */
93	  DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
94	}
95      else if ((op & 0xfc00f83f) == 0x0000f809)
96	{
97	  /* This is a "jalr" instruction (indirect call).  */
98	  DBG (CALLDEBUG,
99	       printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
100	  arc_add (parent, &indirect_child, (unsigned long) 0);
101	}
102    }
103}
104