gprof/mips.c

   1 /*
   2  * Copyright (c) 1983, 1998 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 "cg_arcs.h"
  21 #include "corefile.h"
  22 #include "hist.h"
  23 #include "symtab.h"
  24
  25 static Sym indirect_child;
  26
  27 void mips_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
  28
  29 void
  30 mips_find_call (parent, p_lowpc, p_highpc)
  31      Sym *parent;
  32      bfd_vma p_lowpc;
  33      bfd_vma p_highpc;
  34 {
  35   bfd_vma pc, dest_pc;
  36   unsigned int op;
  37   int offset;
  38   Sym *child;
  39   static bool inited = FALSE;
  40
  41   if (!inited)
  42     {
  43       inited = TRUE;
  44       sym_init (&indirect_child);
  45       indirect_child.name = _("<indirect child>");
  46       indirect_child.cg.prop.fract = 1.0;
  47       indirect_child.cg.cyc.head = &indirect_child;
  48     }
  49
  50   if (!core_text_space)
  51     {
  52       return;
  53     }
  54   if (p_lowpc < s_lowpc)
  55     {
  56       p_lowpc = s_lowpc;
  57     }
  58   if (p_highpc > s_highpc)
  59     {
  60       p_highpc = s_highpc;
  61     }
  62   DBG (CALLDEBUG, printf (_("[find_call] %s: 0x%lx to 0x%lx\n"),
  63                           parent->name, (unsigned long) p_lowpc,
  64                           (unsigned long) p_highpc));
  65   for (pc = p_lowpc; pc < p_highpc; pc += 4)
  66     {
  67       op = bfd_get_32 (core_bfd, &((char *)core_text_space)[pc - s_lowpc]);
  68       if ((op & 0xfc000000) == 0x0c000000)
  69         {
  70           /* This is a "jal" instruction.  Check that the destination
  71              is the address of a function.  */
  72           DBG (CALLDEBUG,
  73                printf (_("[find_call] 0x%lx: jal"), (unsigned long) pc));
  74           offset = (op & 0x03ffffff) << 2;
  75           dest_pc = (pc & ~0xfffffff) | offset;
  76           if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
  77             {
  78               child = sym_lookup (&symtab, dest_pc);
  79               DBG (CALLDEBUG,
  80                    printf (" 0x%lx\t; name=%s, addr=0x%lx",
  81                            (unsigned long) dest_pc, child->name,
  82                            (unsigned long) child->addr));
  83               if (child->addr == dest_pc)
  84                 {
  85                   DBG (CALLDEBUG, printf ("\n"));
  86                   /* a hit:  */
  87                   arc_add (parent, child, (unsigned long) 0);
  88                   continue;
  89                 }
  90             }
  91           /* Something funny going on.  */
  92           DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
  93         }
  94       else if ((op & 0xfc00f83f) == 0x0000f809)
  95         {
  96           /* This is a "jalr" instruction (indirect call).  */
  97           DBG (CALLDEBUG,
  98                printf (_("[find_call] 0x%lx: jalr\n"), (unsigned long) pc));
  99           arc_add (parent, &indirect_child, (unsigned long) 0);
 100         }
 101     }
 102 }