| 1 | /*
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| 2 | * Copyright (c) 1983, 2001 Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms are permitted
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| 6 | * provided that: (1) source distributions retain this entire copyright
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| 7 | * notice and comment, and (2) distributions including binaries display
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| 8 | * the following acknowledgement: ``This product includes software
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| 9 | * developed by the University of California, Berkeley and its contributors''
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| 10 | * in the documentation or other materials provided with the distribution
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| 11 | * and in all advertising materials mentioning features or use of this
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| 12 | * software. Neither the name of the University nor the names of its
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| 13 | * contributors may be used to endorse or promote products derived
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| 14 | * from this software without specific prior written permission.
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 18 | */
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| 19 | #include "gprof.h"
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| 20 | #include "cg_arcs.h"
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| 21 | #include "corefile.h"
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| 22 | #include "hist.h"
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| 23 | #include "symtab.h"
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| 24 |
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| 25 |
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| 26 | int
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| 27 | DEFUN (i386_iscall, (ip), unsigned char *ip)
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| 28 | {
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| 29 | if (*ip == 0xe8)
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| 30 | return 1;
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| 31 | return 0;
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| 32 | }
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| 33 |
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| 34 |
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| 35 | void
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| 36 | i386_find_call (parent, p_lowpc, p_highpc)
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| 37 | Sym *parent;
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| 38 | bfd_vma p_lowpc;
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| 39 | bfd_vma p_highpc;
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| 40 | {
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| 41 | unsigned char *instructp;
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| 42 | Sym *child;
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| 43 | bfd_vma destpc, delta;
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| 44 |
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| 45 | if (core_text_space == 0)
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| 46 | {
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| 47 | return;
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| 48 | }
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| 49 | if (p_lowpc < s_lowpc)
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| 50 | {
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| 51 | p_lowpc = s_lowpc;
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| 52 | }
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| 53 | if (p_highpc > s_highpc)
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| 54 | {
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| 55 | p_highpc = s_highpc;
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| 56 | }
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| 57 | DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
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| 58 | parent->name, (unsigned long) p_lowpc,
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| 59 | (unsigned long) p_highpc));
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| 60 |
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| 61 | delta = (bfd_vma) core_text_space - core_text_sect->vma;
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| 62 |
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| 63 | for (instructp = (unsigned char *) (p_lowpc + delta);
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| 64 | instructp < (unsigned char *) (p_highpc + delta);
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| 65 | instructp ++)
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| 66 | {
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| 67 | if (i386_iscall (instructp))
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| 68 | {
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| 69 | DBG (CALLDEBUG,
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| 70 | printf ("[findcall]\t0x%lx:call",
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| 71 | (unsigned long) (instructp - (unsigned char *) delta)));
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| 72 | /*
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| 73 | * regular pc relative addressing
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| 74 | * check that this is the address of
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| 75 | * a function.
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| 76 | */
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| 77 |
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| 78 | destpc = ((bfd_vma) bfd_get_32 (core_bfd, instructp + 1)
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| 79 | + (bfd_vma) instructp - (bfd_vma) delta + 5);
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| 80 | if (destpc >= s_lowpc && destpc <= s_highpc)
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| 81 | {
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| 82 | child = sym_lookup (&symtab, destpc);
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| 83 | if (child && child->addr == destpc)
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| 84 | {
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| 85 | /*
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| 86 | * a hit
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| 87 | */
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| 88 | DBG (CALLDEBUG,
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| 89 | printf ("\tdestpc 0x%lx (%s)\n",
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| 90 | (unsigned long) destpc, child->name));
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| 91 | arc_add (parent, child, (unsigned long) 0);
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| 92 | instructp += 4; /* call is a 5 byte instruction */
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| 93 | continue;
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| 94 | }
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| 95 | }
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| 96 | /*
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| 97 | * else:
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| 98 | * it looked like a callf, but it:
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| 99 | * a) wasn't actually a callf, or
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| 100 | * b) didn't point to a known function in the symtab, or
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| 101 | * c) something funny is going on.
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| 102 | */
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| 103 | DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
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| 104 | }
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| 105 | }
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| 106 | }
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