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