105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "gprof.h"
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#include "cg_arcs.h"
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#include "core.h"
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#include "hist.h"
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#include "symtab.h"
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int
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DEFUN (i386_iscall, (ip), 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 destpc, delta;
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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, p_lowpc, p_highpc));
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delta = (bfd_vma) core_text_space - core_text_sect->vma;
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for (instructp = (unsigned char *) (p_lowpc + delta);
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instructp < (unsigned char *) (p_highpc + delta);
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instructp ++)
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{
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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%x:call",
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instructp - (unsigned char *) delta));
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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_vma) bfd_get_32 (core_bfd, instructp + 1)
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+ (bfd_vma) instructp - (bfd_vma) delta + 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", destpc, child->name));
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arc_add (parent, child, (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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