1*75fd0b74Schristos /* Gprof -c option support for AArch64.
2*75fd0b74Schristos Copyright 2013 Linaro Ltd.
3*75fd0b74Schristos
4*75fd0b74Schristos Based upon gprof/i386.c.
5*75fd0b74Schristos
6*75fd0b74Schristos Copyright (c) 1983, 1993, 2001
7*75fd0b74Schristos The Regents of the University of California. All rights reserved.
8*75fd0b74Schristos
9*75fd0b74Schristos Redistribution and use in source and binary forms, with or without
10*75fd0b74Schristos modification, are permitted provided that the following conditions
11*75fd0b74Schristos are met:
12*75fd0b74Schristos
13*75fd0b74Schristos 1. Redistributions of source code must retain the above copyright
14*75fd0b74Schristos notice, this list of conditions and the following disclaimer.
15*75fd0b74Schristos 2. Redistributions in binary form must reproduce the above copyright
16*75fd0b74Schristos notice, this list of conditions and the following disclaimer in the
17*75fd0b74Schristos documentation and/or other materials provided with the distribution.
18*75fd0b74Schristos 3. Neither the name of the University nor the names of its contributors
19*75fd0b74Schristos may be used to endorse or promote products derived from this software
20*75fd0b74Schristos without specific prior written permission.
21*75fd0b74Schristos
22*75fd0b74Schristos THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23*75fd0b74Schristos ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24*75fd0b74Schristos IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25*75fd0b74Schristos ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26*75fd0b74Schristos FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27*75fd0b74Schristos DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28*75fd0b74Schristos OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29*75fd0b74Schristos HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30*75fd0b74Schristos LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31*75fd0b74Schristos OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32*75fd0b74Schristos SUCH DAMAGE. */
33*75fd0b74Schristos
34*75fd0b74Schristos #include "gprof.h"
35*75fd0b74Schristos #include "search_list.h"
36*75fd0b74Schristos #include "source.h"
37*75fd0b74Schristos #include "symtab.h"
38*75fd0b74Schristos #include "cg_arcs.h"
39*75fd0b74Schristos #include "corefile.h"
40*75fd0b74Schristos #include "hist.h"
41*75fd0b74Schristos
42*75fd0b74Schristos #define BRANCH_MASK 0x7c000000
43*75fd0b74Schristos #define BRANCH_PATTERN 0x14000000
44*75fd0b74Schristos
45*75fd0b74Schristos void aarch64_find_call (Sym *, bfd_vma, bfd_vma);
46*75fd0b74Schristos
47*75fd0b74Schristos void
aarch64_find_call(Sym * parent,bfd_vma p_lowpc,bfd_vma p_highpc)48*75fd0b74Schristos aarch64_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
49*75fd0b74Schristos {
50*75fd0b74Schristos bfd_vma pc, dest_pc, offset;
51*75fd0b74Schristos unsigned int insn;
52*75fd0b74Schristos Sym *child;
53*75fd0b74Schristos
54*75fd0b74Schristos DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
55*75fd0b74Schristos parent->name, (unsigned long) p_lowpc,
56*75fd0b74Schristos (unsigned long) p_highpc));
57*75fd0b74Schristos
58*75fd0b74Schristos for (pc = p_lowpc; pc < p_highpc; pc += 4)
59*75fd0b74Schristos {
60*75fd0b74Schristos
61*75fd0b74Schristos insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
62*75fd0b74Schristos + pc - core_text_sect->vma));
63*75fd0b74Schristos
64*75fd0b74Schristos if ((insn & BRANCH_MASK) == BRANCH_PATTERN)
65*75fd0b74Schristos {
66*75fd0b74Schristos DBG (CALLDEBUG,
67*75fd0b74Schristos printf ("[find_call] 0x%lx: bl", (unsigned long) pc));
68*75fd0b74Schristos
69*75fd0b74Schristos /* Regular pc relative addressing check that this is the
70*75fd0b74Schristos address of a function. */
71*75fd0b74Schristos offset = ((((bfd_vma) insn & 0x3ffffff) ^ 0x2000000) - 0x2000000) << 2;
72*75fd0b74Schristos
73*75fd0b74Schristos dest_pc = pc + offset;
74*75fd0b74Schristos
75*75fd0b74Schristos if (hist_check_address (dest_pc))
76*75fd0b74Schristos {
77*75fd0b74Schristos child = sym_lookup (&symtab, dest_pc);
78*75fd0b74Schristos
79*75fd0b74Schristos if (child)
80*75fd0b74Schristos {
81*75fd0b74Schristos DBG (CALLDEBUG,
82*75fd0b74Schristos printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
83*75fd0b74Schristos (unsigned long) dest_pc, child->name,
84*75fd0b74Schristos (unsigned long) child->addr));
85*75fd0b74Schristos
86*75fd0b74Schristos if (child->addr == dest_pc)
87*75fd0b74Schristos {
88*75fd0b74Schristos /* a hit. */
89*75fd0b74Schristos arc_add (parent, child, (unsigned long) 0);
90*75fd0b74Schristos continue;
91*75fd0b74Schristos }
92*75fd0b74Schristos }
93*75fd0b74Schristos }
94*75fd0b74Schristos
95*75fd0b74Schristos /* Something funny going on. */
96*75fd0b74Schristos DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
97*75fd0b74Schristos }
98*75fd0b74Schristos }
99*75fd0b74Schristos }
100