| 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 | |
| 58 | for (pc = p_lowpc; pc < p_highpc; pc += 4) |
| 59 | { |
| 60 | |
| 61 | insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space |
| 62 | + pc - core_text_sect->vma)); |
| 63 | |
| 64 | if ((insn & BRANCH_MASK) == BRANCH_PATTERN) |
| 65 | { |
| 66 | DBG (CALLDEBUG, |
| 67 | printf ("[find_call] 0x%lx: bl", (unsigned long) pc)); |
| 68 | |
| 69 | /* Regular pc relative addressing check that this is the |
| 70 | address of a function. */ |
| 71 | offset = ((((bfd_vma) insn & 0x3ffffff) ^ 0x2000000) - 0x2000000) << 2; |
| 72 | |
| 73 | dest_pc = pc + offset; |
| 74 | |
| 75 | if (hist_check_address (dest_pc)) |
| 76 | { |
| 77 | child = sym_lookup (&symtab, dest_pc); |
| 78 | |
| 79 | if (child) |
| 80 | { |
| 81 | DBG (CALLDEBUG, |
| 82 | printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n", |
| 83 | (unsigned long) dest_pc, child->name, |
| 84 | (unsigned long) child->addr)); |
| 85 | |
| 86 | if (child->addr == dest_pc) |
| 87 | { |
| 88 | /* a hit. */ |
| 89 | arc_add (parent, child, (unsigned long) 0); |
| 90 | continue; |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | /* Something funny going on. */ |
| 96 | DBG (CALLDEBUG, printf ("\tbut it's a botch\n")); |
| 97 | } |
| 98 | } |
| 99 | } |