110 lines
2.9 KiB
C
110 lines
2.9 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 (iscall, (ip), unsigned char *ip)
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{
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if (*ip == 0xeb || *ip == 0x9a)
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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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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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long length;
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Sym *child;
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bfd_vma 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, p_lowpc, p_highpc));
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for (instructp = (unsigned char *) core_text_space + p_lowpc;
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instructp < (unsigned char *) core_text_space + p_highpc;
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instructp += length)
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{
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length = 1;
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if (iscall (instructp))
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{
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DBG (CALLDEBUG,
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printf ("[findcall]\t0x%x:callf",
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instructp - (unsigned char *) core_text_space));
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length = 4;
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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) instructp + 5 - (bfd_vma) core_text_space);
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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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DBG (CALLDEBUG,
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printf ("[findcall]\tdestpc 0x%lx", destpc);
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printf (" child->name %s", child->name);
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printf (" child->addr 0x%lx\n", child->addr);
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);
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if (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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arc_add (parent, child, (long) 0);
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length += 4; /* constant lengths */
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continue;
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}
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goto botched;
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}
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/*
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* else:
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* it looked like a callf,
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* but it wasn't to anywhere.
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*/
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botched:
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/*
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* something funny going on.
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*/
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DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
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length = 1;
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continue;
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}
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}
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}
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