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 PARAMS ((Sym *, bfd_vma, bfd_vma));
  40
  41 void
  42 mips_find_call (parent, p_lowpc, p_highpc)
  43      Sym *parent;
  44      bfd_vma p_lowpc;
  45      bfd_vma p_highpc;
  46 {
  47   bfd_vma pc, dest_pc;
  48   unsigned int op;
  49   int offset;
  50   Sym *child;
  51   static boolean inited = false;
  52
  53   if (!inited)
  54     {
  55       inited = true;
  56       sym_init (&indirect_child);
  57       indirect_child.name = _("<indirect child>");
  58       indirect_child.cg.prop.fract = 1.0;
  59       indirect_child.cg.cyc.head = &indirect_child;
  60     }
  61
  62   if (!core_text_space)
  63     {
  64       return;
  65     }
  66   if (p_lowpc < s_lowpc)
  67     {
  68       p_lowpc = s_lowpc;
  69     }
  70   if (p_highpc > s_highpc)
  71     {
  72       p_highpc = s_highpc;
  73     }
  74   DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
  75                           parent->name, (unsigned long) p_lowpc,
  76                           (unsigned long) p_highpc));
  77   for (pc = p_lowpc; pc < p_highpc; pc += 4)
  78     {
  79       op = bfd_get_32 (core_bfd, &((char *)core_text_space)[pc - s_lowpc]);
  80       if ((op & 0xfc000000) == 0x0c000000)
  81         {
  82           /* This is a "jal" instruction.  Check that the destination
  83              is the address of a function.  */
  84           DBG (CALLDEBUG,
  85                printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
  86           offset = (op & 0x03ffffff) << 2;
  87           dest_pc = (pc & ~(bfd_vma) 0xfffffff) | offset;
  88           if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
  89             {
  90               child = sym_lookup (&symtab, dest_pc);
  91               DBG (CALLDEBUG,
  92                    printf (" 0x%lx\t; name=%s, addr=0x%lx",
  93                            (unsigned long) dest_pc, child->name,
  94                            (unsigned long) child->addr));
  95               if (child->addr == dest_pc)
  96                 {
  97                   DBG (CALLDEBUG, printf ("\n"));
  98                   /* a hit:  */
  99                   arc_add (parent, child, (unsigned long) 0);
 100                   continue;
 101                 }
 102             }
 103           /* Something funny going on.  */
 104           DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
 105         }
 106       else if ((op & 0xfc00f83f) == 0x0000f809)
 107         {
 108           /* This is a "jalr" instruction (indirect call).  */
 109           DBG (CALLDEBUG,
 110                printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
 111           arc_add (parent, &indirect_child, (unsigned long) 0);
 112         }
 113     }
 114 }