gprof/sparc.c

   1 /*
   2  * Copyright (c) 1983 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that: (1) source distributions retain this entire copyright
   7  * notice and comment, and (2) distributions including binaries display
   8  * the following acknowledgement:  ``This product includes software
   9  * developed by the University of California, Berkeley and its contributors''
  10  * in the documentation or other materials provided with the distribution
  11  * and in all advertising materials mentioning features or use of this
  12  * software. Neither the name of the University nor the names of its
  13  * contributors may be used to endorse or promote products derived
  14  * from this software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  */
  19 #include "gprof.h"
  20 #include "search_list.h"
  21 #include "source.h"
  22 #include "symtab.h"
  23 #include "cg_arcs.h"
  24 #include "corefile.h"
  25 #include "hist.h"
  26
  27     /*
  28      *        opcode of the `callf' instruction
  29      */
  30 #define CALL    (0xc0000000)
  31
  32 void sparc_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
  33
  34 void
  35 sparc_find_call (parent, p_lowpc, p_highpc)
  36      Sym *parent;
  37      bfd_vma p_lowpc;
  38      bfd_vma p_highpc;
  39 {
  40   bfd_vma pc, dest_pc;
  41   unsigned int insn;
  42   Sym *child;
  43
  44   if (core_text_space == 0)
  45     {
  46       return;
  47     }
  48   if (p_lowpc < s_lowpc)
  49     {
  50       p_lowpc = s_lowpc;
  51     }
  52   if (p_highpc > s_highpc)
  53     {
  54       p_highpc = s_highpc;
  55     }
  56   DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
  57                           parent->name, (unsigned long) p_lowpc,
  58                           (unsigned long) p_highpc));
  59   for (pc = (p_lowpc + 3) & ~(bfd_vma) 3; pc < p_highpc; pc += 4)
  60     {
  61       insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
  62                                     + pc - core_text_sect->vma));
  63       if (insn & CALL)
  64         {
  65           DBG (CALLDEBUG,
  66                printf ("[find_call] 0x%lx: callf", (unsigned long) pc));
  67           /*
  68            * Regular pc relative addressing check that this is the
  69            * address of a function.
  70            */
  71           dest_pc = pc + (((bfd_signed_vma) (insn & 0x3fffffff)
  72                            ^ 0x20000000) - 0x20000000);
  73           if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
  74             {
  75               child = sym_lookup (&symtab, dest_pc);
  76               DBG (CALLDEBUG,
  77                    printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
  78                            (unsigned long) dest_pc, child->name,
  79                            (unsigned long) child->addr));
  80               if (child->addr == dest_pc)
  81                 {
  82                   /* a hit:  */
  83                   arc_add (parent, child, (unsigned long) 0);
  84                   continue;
  85                 }
  86             }
  87           /*
  88            * Something funny going on.
  89            */
  90           DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
  91         }
  92     }
  93 }