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