1*a9fa9459Szrj /* Gprof -c option support for AArch64.
2*a9fa9459Szrj Copyright 2013 Linaro Ltd.
3*a9fa9459Szrj
4*a9fa9459Szrj Based upon gprof/i386.c.
5*a9fa9459Szrj
6*a9fa9459Szrj Copyright (c) 1983, 1993, 2001
7*a9fa9459Szrj The Regents of the University of California. All rights reserved.
8*a9fa9459Szrj
9*a9fa9459Szrj Redistribution and use in source and binary forms, with or without
10*a9fa9459Szrj modification, are permitted provided that the following conditions
11*a9fa9459Szrj are met:
12*a9fa9459Szrj
13*a9fa9459Szrj 1. Redistributions of source code must retain the above copyright
14*a9fa9459Szrj notice, this list of conditions and the following disclaimer.
15*a9fa9459Szrj 2. Redistributions in binary form must reproduce the above copyright
16*a9fa9459Szrj notice, this list of conditions and the following disclaimer in the
17*a9fa9459Szrj documentation and/or other materials provided with the distribution.
18*a9fa9459Szrj 3. Neither the name of the University nor the names of its contributors
19*a9fa9459Szrj may be used to endorse or promote products derived from this software
20*a9fa9459Szrj without specific prior written permission.
21*a9fa9459Szrj
22*a9fa9459Szrj THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23*a9fa9459Szrj ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24*a9fa9459Szrj IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25*a9fa9459Szrj ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26*a9fa9459Szrj FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27*a9fa9459Szrj DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28*a9fa9459Szrj OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29*a9fa9459Szrj HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30*a9fa9459Szrj LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31*a9fa9459Szrj OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32*a9fa9459Szrj SUCH DAMAGE. */
33*a9fa9459Szrj
34*a9fa9459Szrj #include "gprof.h"
35*a9fa9459Szrj #include "search_list.h"
36*a9fa9459Szrj #include "source.h"
37*a9fa9459Szrj #include "symtab.h"
38*a9fa9459Szrj #include "cg_arcs.h"
39*a9fa9459Szrj #include "corefile.h"
40*a9fa9459Szrj #include "hist.h"
41*a9fa9459Szrj
42*a9fa9459Szrj #define BRANCH_MASK 0x7c000000
43*a9fa9459Szrj #define BRANCH_PATTERN 0x14000000
44*a9fa9459Szrj
45*a9fa9459Szrj void aarch64_find_call (Sym *, bfd_vma, bfd_vma);
46*a9fa9459Szrj
47*a9fa9459Szrj void
aarch64_find_call(Sym * parent,bfd_vma p_lowpc,bfd_vma p_highpc)48*a9fa9459Szrj aarch64_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
49*a9fa9459Szrj {
50*a9fa9459Szrj bfd_vma pc, dest_pc, offset;
51*a9fa9459Szrj unsigned int insn;
52*a9fa9459Szrj Sym *child;
53*a9fa9459Szrj
54*a9fa9459Szrj DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
55*a9fa9459Szrj parent->name, (unsigned long) p_lowpc,
56*a9fa9459Szrj (unsigned long) p_highpc));
57*a9fa9459Szrj
58*a9fa9459Szrj for (pc = p_lowpc; pc < p_highpc; pc += 4)
59*a9fa9459Szrj {
60*a9fa9459Szrj
61*a9fa9459Szrj insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
62*a9fa9459Szrj + pc - core_text_sect->vma));
63*a9fa9459Szrj
64*a9fa9459Szrj if ((insn & BRANCH_MASK) == BRANCH_PATTERN)
65*a9fa9459Szrj {
66*a9fa9459Szrj DBG (CALLDEBUG,
67*a9fa9459Szrj printf ("[find_call] 0x%lx: bl", (unsigned long) pc));
68*a9fa9459Szrj
69*a9fa9459Szrj /* Regular pc relative addressing check that this is the
70*a9fa9459Szrj address of a function. */
71*a9fa9459Szrj offset = ((((bfd_vma) insn & 0x3ffffff) ^ 0x2000000) - 0x2000000) << 2;
72*a9fa9459Szrj
73*a9fa9459Szrj dest_pc = pc + offset;
74*a9fa9459Szrj
75*a9fa9459Szrj if (hist_check_address (dest_pc))
76*a9fa9459Szrj {
77*a9fa9459Szrj child = sym_lookup (&symtab, dest_pc);
78*a9fa9459Szrj
79*a9fa9459Szrj if (child)
80*a9fa9459Szrj {
81*a9fa9459Szrj DBG (CALLDEBUG,
82*a9fa9459Szrj printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
83*a9fa9459Szrj (unsigned long) dest_pc, child->name,
84*a9fa9459Szrj (unsigned long) child->addr));
85*a9fa9459Szrj
86*a9fa9459Szrj if (child->addr == dest_pc)
87*a9fa9459Szrj {
88*a9fa9459Szrj /* a hit. */
89*a9fa9459Szrj arc_add (parent, child, (unsigned long) 0);
90*a9fa9459Szrj continue;
91*a9fa9459Szrj }
92*a9fa9459Szrj }
93*a9fa9459Szrj }
94*a9fa9459Szrj
95*a9fa9459Szrj /* Something funny going on. */
96*a9fa9459Szrj DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
97*a9fa9459Szrj }
98*a9fa9459Szrj }
99*a9fa9459Szrj }
100