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- /*
- * Copyright (c) 1983 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 "cg_arcs.h"
- #include "core.h"
- #include "hist.h"
- #include "symtab.h"
-
-
- int
- DEFUN (iscall, (ip), unsigned char *ip)
- {
- if (*ip == 0xeb || *ip == 0x9a)
- return 1;
- return 0;
- }
-
-
- void
- find_call (parent, p_lowpc, p_highpc)
- Sym *parent;
- bfd_vma p_lowpc;
- bfd_vma p_highpc;
- {
- unsigned char *instructp;
- long length;
- Sym *child;
- bfd_vma 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, p_lowpc, p_highpc));
- for (instructp = (unsigned char *) core_text_space + p_lowpc;
- instructp < (unsigned char *) core_text_space + p_highpc;
- instructp += length)
- {
- length = 1;
- if (iscall (instructp))
- {
- DBG (CALLDEBUG,
- printf ("[findcall]\t0x%x:callf",
- instructp - (unsigned char *) core_text_space));
- length = 4;
- /*
- * regular pc relative addressing
- * check that this is the address of
- * a function.
- */
- destpc = ((bfd_vma) instructp + 5 - (bfd_vma) core_text_space);
- if (destpc >= s_lowpc && destpc <= s_highpc)
- {
- child = sym_lookup (&symtab, destpc);
- DBG (CALLDEBUG,
- printf ("[findcall]\tdestpc 0x%lx", destpc);
- printf (" child->name %s", child->name);
- printf (" child->addr 0x%lx\n", child->addr);
- );
- if (child->addr == destpc)
- {
- /*
- * a hit
- */
- arc_add (parent, child, (long) 0);
- length += 4; /* constant lengths */
- continue;
- }
- goto botched;
- }
- /*
- * else:
- * it looked like a callf,
- * but it wasn't to anywhere.
- */
- botched:
- /*
- * something funny going on.
- */
- DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
- length = 1;
- continue;
- }
- }
- }
-