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100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/* Gprof -c option support for AArch64.
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Copyright 2013 Linaro Ltd.
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Based upon gprof/i386.c.
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Copyright (c) 1983, 1993, 2001
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The Regents of the University of California. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE. */
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#include "gprof.h"
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#include "search_list.h"
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#include "source.h"
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#include "symtab.h"
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#include "cg_arcs.h"
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#include "corefile.h"
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#include "hist.h"
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#define BRANCH_MASK 0x7c000000
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#define BRANCH_PATTERN 0x14000000
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void aarch64_find_call (Sym *, bfd_vma, bfd_vma);
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void
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aarch64_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
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{
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bfd_vma pc, dest_pc, offset;
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unsigned int insn;
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Sym *child;
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DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
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parent->name, (unsigned long) p_lowpc,
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(unsigned long) p_highpc));
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for (pc = p_lowpc; pc < p_highpc; pc += 4)
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{
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insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
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+ pc - core_text_sect->vma));
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if ((insn & BRANCH_MASK) == BRANCH_PATTERN)
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{
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DBG (CALLDEBUG,
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printf ("[find_call] 0x%lx: bl", (unsigned long) pc));
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/* Regular pc relative addressing check that this is the
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address of a function. */
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offset = ((((bfd_vma) insn & 0x3ffffff) ^ 0x2000000) - 0x2000000) << 2;
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dest_pc = pc + offset;
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if (hist_check_address (dest_pc))
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{
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child = sym_lookup (&symtab, dest_pc);
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if (child)
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{
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DBG (CALLDEBUG,
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printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
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(unsigned long) dest_pc, child->name,
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(unsigned long) child->addr));
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if (child->addr == dest_pc)
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{
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/* a hit. */
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arc_add (parent, child, (unsigned long) 0);
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continue;
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}
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}
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}
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/* Something funny going on. */
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DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
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}
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}
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}
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