gprof/aarch64.c

   1 /* Gprof -c option support for AArch64.
   2    Copyright 2013 Linaro Ltd.
   3
   4    Based upon gprof/i386.c.
   5
   6    Copyright (c) 1983, 1993, 2001
   7    The Regents of the University of California.  All rights reserved.
   8
   9    Redistribution and use in source and binary forms, with or without
  10    modification, are permitted provided that the following conditions
  11    are met:
  12
  13    1.  Redistributions of source code must retain the above copyright
  14        notice, this list of conditions and the following disclaimer.
  15    2.  Redistributions in binary form must reproduce the above copyright
  16        notice, this list of conditions and the following disclaimer in the
  17        documentation and/or other materials provided with the distribution.
  18    3.  Neither the name of the University nor the names of its contributors
  19        may be used to endorse or promote products derived from this software
  20        without specific prior written permission.
  21
  22    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32    SUCH DAMAGE.  */
  33
  34 #include "gprof.h"
  35 #include "search_list.h"
  36 #include "source.h"
  37 #include "symtab.h"
  38 #include "cg_arcs.h"
  39 #include "corefile.h"
  40 #include "hist.h"
  41
  42 #define BRANCH_MASK    0x7c000000
  43 #define BRANCH_PATTERN 0x14000000
  44
  45 void aarch64_find_call (Sym *, bfd_vma, bfd_vma);
  46
  47 void
  48 aarch64_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
  49 {
  50   bfd_vma pc, dest_pc, offset;
  51   unsigned int insn;
  52   Sym *child;
  53
  54   DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
  55                           parent->name, (unsigned long) p_lowpc,
  56                           (unsigned long) p_highpc));
  57   p_lowpc = (p_lowpc + 3) & ~3;
  58   p_highpc &= ~3;
  59   for (pc = p_lowpc; pc < p_highpc; pc += 4)
  60     {
  61
  62       insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
  63                                     + pc - core_text_sect->vma));
  64
  65       if ((insn & BRANCH_MASK) == BRANCH_PATTERN)
  66         {
  67           DBG (CALLDEBUG,
  68                printf ("[find_call] 0x%lx: bl", (unsigned long) pc));
  69
  70           /* Regular pc relative addressing check that this is the
  71              address of a function.  */
  72           offset = ((((bfd_vma) insn & 0x3ffffff) ^ 0x2000000) - 0x2000000) << 2;
  73
  74           dest_pc = pc + offset;
  75
  76           if (hist_check_address (dest_pc))
  77             {
  78               child = sym_lookup (&symtab, dest_pc);
  79
  80               if (child)
  81                 {
  82                   DBG (CALLDEBUG,
  83                        printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
  84                                (unsigned long) dest_pc, child->name,
  85                                (unsigned long) child->addr));
  86
  87                   if (child->addr == dest_pc)
  88                     {
  89                       /* a hit.  */
  90                       arc_add (parent, child, (unsigned long) 0);
  91                       continue;
  92                     }
  93                 }
  94             }
  95
  96           /* Something funny going on.  */
  97           DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
  98         }
  99     }
 100 }