| 1 | /*
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| 2 | * Copyright (c) 1983, 1993, 2001
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the University nor the names of its contributors
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| 14 | * may be used to endorse or promote products derived from this software
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| 15 | * without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 27 | * SUCH DAMAGE.
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| 28 | */
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| 29 | #include "gprof.h"
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| 30 | #include "search_list.h"
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| 31 | #include "source.h"
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| 32 | #include "symtab.h"
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| 33 | #include "cg_arcs.h"
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| 34 | #include "corefile.h"
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| 35 | #include "hist.h"
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| 36 |
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| 37 | static int i386_iscall PARAMS ((unsigned char *));
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| 38 | void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
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| 39 |
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| 40 | static int
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| 41 | i386_iscall (ip)
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| 42 | unsigned char *ip;
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| 43 | {
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| 44 | if (*ip == 0xe8)
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| 45 | return 1;
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| 46 | return 0;
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| 47 | }
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| 48 |
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| 49 |
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| 50 | void
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| 51 | i386_find_call (parent, p_lowpc, p_highpc)
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| 52 | Sym *parent;
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| 53 | bfd_vma p_lowpc;
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| 54 | bfd_vma p_highpc;
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| 55 | {
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| 56 | unsigned char *instructp;
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| 57 | Sym *child;
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| 58 | bfd_vma pc, destpc;
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| 59 |
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| 60 | if (core_text_space == 0)
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| 61 | {
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| 62 | return;
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| 63 | }
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| 64 | if (p_lowpc < s_lowpc)
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| 65 | {
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| 66 | p_lowpc = s_lowpc;
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| 67 | }
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| 68 | if (p_highpc > s_highpc)
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| 69 | {
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| 70 | p_highpc = s_highpc;
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| 71 | }
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| 72 | DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
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| 73 | parent->name, (unsigned long) p_lowpc,
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| 74 | (unsigned long) p_highpc));
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| 75 |
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| 76 | for (pc = p_lowpc; pc < p_highpc; ++pc)
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| 77 | {
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| 78 | instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
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| 79 | if (i386_iscall (instructp))
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| 80 | {
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| 81 | DBG (CALLDEBUG,
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| 82 | printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
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| 83 | /*
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| 84 | * regular pc relative addressing
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| 85 | * check that this is the address of
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| 86 | * a function.
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| 87 | */
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| 88 |
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| 89 | destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
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| 90 | if (destpc >= s_lowpc && destpc <= s_highpc)
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| 91 | {
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| 92 | child = sym_lookup (&symtab, destpc);
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| 93 | if (child && child->addr == destpc)
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| 94 | {
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| 95 | /*
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| 96 | * a hit
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| 97 | */
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| 98 | DBG (CALLDEBUG,
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| 99 | printf ("\tdestpc 0x%lx (%s)\n",
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| 100 | (unsigned long) destpc, child->name));
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| 101 | arc_add (parent, child, (unsigned long) 0);
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| 102 | instructp += 4; /* call is a 5 byte instruction */
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| 103 | continue;
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| 104 | }
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| 105 | }
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| 106 | /*
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| 107 | * else:
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| 108 | * it looked like a callf, but it:
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| 109 | * a) wasn't actually a callf, or
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| 110 | * b) didn't point to a known function in the symtab, or
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| 111 | * c) something funny is going on.
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| 112 | */
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| 113 | DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
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| 114 | }
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| 115 | }
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| 116 | }
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