1 /*
2  * Copyright (c) 1983, 1993
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 #include "gprof.h"
30 #include "search_list.h"
31 #include "source.h"
32 #include "symtab.h"
33 #include "cg_arcs.h"
34 #include "corefile.h"
35 #include "hist.h"
36 
37     /*
38      *        opcode of the `callf' instruction
39      */
40 #define	CALL	(0xc0000000)
41 
42 void sparc_find_call (Sym *, bfd_vma, bfd_vma);
43 
44 void
45 sparc_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
46 {
47   bfd_vma pc, dest_pc;
48   unsigned int insn;
49   Sym *child;
50 
51   if (core_text_space == 0)
52     {
53       return;
54     }
55   if (p_lowpc < s_lowpc)
56     {
57       p_lowpc = s_lowpc;
58     }
59   if (p_highpc > s_highpc)
60     {
61       p_highpc = s_highpc;
62     }
63   DBG (CALLDEBUG, printf ("[find_call] %s: 0x%lx to 0x%lx\n",
64 			  parent->name, (unsigned long) p_lowpc,
65 			  (unsigned long) p_highpc));
66   for (pc = (p_lowpc + 3) & ~(bfd_vma) 3; pc < p_highpc; pc += 4)
67     {
68       insn = bfd_get_32 (core_bfd, ((unsigned char *) core_text_space
69 				    + pc - core_text_sect->vma));
70       if (insn & CALL)
71 	{
72 	  DBG (CALLDEBUG,
73 	       printf ("[find_call] 0x%lx: callf", (unsigned long) pc));
74 	  /*
75 	   * Regular pc relative addressing check that this is the
76 	   * address of a function.
77 	   */
78 	  dest_pc = pc + (((bfd_signed_vma) (insn & 0x3fffffff)
79 			   ^ 0x20000000) - 0x20000000);
80 	  if (dest_pc >= s_lowpc && dest_pc <= s_highpc)
81 	    {
82 	      child = sym_lookup (&symtab, dest_pc);
83 	      DBG (CALLDEBUG,
84 		   printf ("\tdest_pc=0x%lx, (name=%s, addr=0x%lx)\n",
85 			   (unsigned long) dest_pc, child->name,
86 			   (unsigned long) child->addr));
87 	      if (child->addr == dest_pc)
88 		{
89 		  /* a hit:  */
90 		  arc_add (parent, child, (unsigned long) 0);
91 		  continue;
92 		}
93 	    }
94 	  /*
95 	   * Something funny going on.
96 	   */
97 	  DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
98 	}
99     }
100 }
101