gprof/mips.c

   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
  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 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   if (!core_text_space)
  60     {
  61       return;
  62     }
  63   if (p_lowpc < s_lowpc)
  64     {
  65       p_lowpc = s_lowpc;
  66     }
  67   if (p_highpc > s_highpc)
  68     {
  69       p_highpc = s_highpc;
  70     }
  71   DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
  72                           parent->name, (unsigned long) p_lowpc,
  73                           (unsigned long) p_highpc));
  74   for (pc = p_lowpc; pc < p_highpc; pc += 4)
  75     {
  76       op = bfd_get_32 (core_bfd, &((char *)core_text_space)[pc - s_lowpc]);
  77       if ((op & 0xfc000000) == 0x0c000000)
  78         {
  79           /* This is a "jal" instruction.  Check that the destination
  80              is the address of a function.  */
  81           DBG (CALLDEBUG,
  82                printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
  83           offset = (op & 0x03ffffff) << 2;
  84           dest_pc = (pc & ~(bfd_vma) 0xfffffff) | offset;
  85           if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
  86             {
  87               child = sym_lookup (&symtab, dest_pc);
  88               DBG (CALLDEBUG,
  89                    printf (" 0x%lx\t; name=%s, addr=0x%lx",
  90                            (unsigned long) dest_pc, child->name,
  91                            (unsigned long) child->addr));
  92               if (child->addr == dest_pc)
  93                 {
  94                   DBG (CALLDEBUG, printf ("\n"));
  95                   /* a hit:  */
  96                   arc_add (parent, child, (unsigned long) 0);
  97                   continue;
  98                 }
  99             }
 100           /* Something funny going on.  */
 101           DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
 102         }
 103       else if ((op & 0xfc00f83f) == 0x0000f809)
 104         {
 105           /* This is a "jalr" instruction (indirect call).  */
 106           DBG (CALLDEBUG,
 107                printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
 108           arc_add (parent, &indirect_child, (unsigned long) 0);
 109         }
 110     }
 111 }