117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*
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* Copyright (c) 1983, 1993, 2001
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "gprof.h"
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#include "search_list.h"
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#include "source.h"
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#include "symtab.h"
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#include "cg_arcs.h"
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#include "corefile.h"
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#include "hist.h"
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static int i386_iscall PARAMS ((unsigned char *));
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void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
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static int
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i386_iscall (ip)
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unsigned char *ip;
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{
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if (*ip == 0xe8)
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return 1;
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return 0;
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}
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void
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i386_find_call (parent, p_lowpc, p_highpc)
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Sym *parent;
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bfd_vma p_lowpc;
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bfd_vma p_highpc;
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{
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unsigned char *instructp;
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Sym *child;
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bfd_vma pc, destpc;
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if (core_text_space == 0)
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{
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return;
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}
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if (p_lowpc < s_lowpc)
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{
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p_lowpc = s_lowpc;
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}
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if (p_highpc > s_highpc)
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{
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p_highpc = s_highpc;
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}
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DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
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parent->name, (unsigned long) p_lowpc,
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(unsigned long) p_highpc));
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for (pc = p_lowpc; pc < p_highpc; ++pc)
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{
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instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
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if (i386_iscall (instructp))
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{
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DBG (CALLDEBUG,
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printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
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/*
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* regular pc relative addressing
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* check that this is the address of
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* a function.
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*/
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destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
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if (destpc >= s_lowpc && destpc <= s_highpc)
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{
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child = sym_lookup (&symtab, destpc);
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if (child && child->addr == destpc)
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{
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/*
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* a hit
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*/
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DBG (CALLDEBUG,
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printf ("\tdestpc 0x%lx (%s)\n",
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(unsigned long) destpc, child->name));
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arc_add (parent, child, (unsigned long) 0);
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instructp += 4; /* call is a 5 byte instruction */
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continue;
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}
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}
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/*
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* else:
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* it looked like a callf, but it:
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* a) wasn't actually a callf, or
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* b) didn't point to a known function in the symtab, or
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* c) something funny is going on.
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*/
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DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
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}
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}
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}
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