gprof/sparc.c

   1 /*
   2  * Copyright (c) 1983, 1993
   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     /*
  38      *        opcode of the `callf' instruction
  39      */
  40 #define CALL    (0xc0000000)
  41
  42 void sparc_find_call (Sym *, bfd_vma, bfd_vma);
  43
  44 void
  45 sparc_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
  46 {
  47   bfd_vma pc, dest_pc;
  48   unsigned int insn;
  49   Sym *child;
  50
  51   DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
  52                           parent->name, (unsigned long) p_lowpc,
  53                           (unsigned long) p_highpc));
  54   for (pc = (p_lowpc + 3) & ~(bfd_vma) 3; pc < p_highpc; pc += 4)
  55     {
  56       insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
  57                                     + pc - core_text_sect->vma));
  58       if (insn & CALL)
  59         {
  60           DBG (CALLDEBUG,
  61                printf ("[find_call] 0x%lx: callf", (unsigned long) pc));
  62           /*
  63            * Regular pc relative addressing check that this is the
  64            * address of a function.
  65            */
  66           dest_pc = pc + (((bfd_signed_vma) (insn & 0x3fffffff)
  67                            ^ 0x20000000) - 0x20000000);
  68           if (hist_check_address (dest_pc))
  69             {
  70               child = sym_lookup (&symtab, dest_pc);
  71               DBG (CALLDEBUG,
  72                    printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
  73                            (unsigned long) dest_pc, child->name,
  74                            (unsigned long) child->addr));
  75               if (child->addr == dest_pc)
  76                 {
  77                   /* a hit:  */
  78                   arc_add (parent, child, (unsigned long) 0);
  79                   continue;
  80                 }
  81             }
  82           /*
  83            * Something funny going on.
  84            */
  85           DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
  86         }
  87     }
  88 }