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  	      if (child)
      72  		{
      73  	          DBG (CALLDEBUG,
      74  		      printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
      75  			     (unsigned long) dest_pc, child->name,
      76  			     (unsigned long) child->addr));
      77  	          if (child->addr == dest_pc)
      78  		    {
      79  		      /* a hit:  */
      80  		      arc_add (parent, child, (unsigned long) 0);
      81  		      continue;
      82  		    }
      83  		}
      84  	    }
      85  	  /*
      86  	   * Something funny going on.
      87  	   */
      88  	  DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
      89  	}
      90      }
      91  }