| /* |
| * Copyright (c) 1983, 2001 Regents of the University of California. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms are permitted |
| * provided that: (1) source distributions retain this entire copyright |
| * notice and comment, and (2) distributions including binaries display |
| * the following acknowledgement: ``This product includes software |
| * developed by the University of California, Berkeley and its contributors'' |
| * in the documentation or other materials provided with the distribution |
| * and in all advertising materials mentioning features or use of this |
| * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| #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 PARAMS ((unsigned char *)); |
| void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
| |
| static int |
| i386_iscall (ip) |
| unsigned char *ip; |
| { |
| if (*ip == 0xe8) |
| return 1; |
| return 0; |
| } |
| |
| |
| void |
| i386_find_call (parent, p_lowpc, p_highpc) |
| Sym *parent; |
| bfd_vma p_lowpc; |
| bfd_vma p_highpc; |
| { |
| unsigned char *instructp; |
| Sym *child; |
| bfd_vma pc, destpc; |
| |
| if (core_text_space == 0) |
| { |
| return; |
| } |
| if (p_lowpc < s_lowpc) |
| { |
| p_lowpc = s_lowpc; |
| } |
| if (p_highpc > s_highpc) |
| { |
| p_highpc = s_highpc; |
| } |
| DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n", |
| parent->name, (unsigned long) p_lowpc, |
| (unsigned long) p_highpc)); |
| |
| 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 (destpc >= s_lowpc && destpc <= s_highpc) |
| { |
| 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")); |
| } |
| } |
| } |