gas/
[binutils.git] / gprof / i386.c
blob91d38fa06cb53838173e5a344f20e47cdb5074ef
1 /*
2 * Copyright (c) 1983, 1993, 2001
3 * The Regents of the University of California. All rights reserved.
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.
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.
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"
37 static int i386_iscall (unsigned char *);
38 void i386_find_call (Sym *, bfd_vma, bfd_vma);
40 static int
41 i386_iscall (unsigned char *ip)
43 if (*ip == 0xe8)
44 return 1;
45 return 0;
49 void
50 i386_find_call (Sym *parent, bfd_vma p_lowpc, bfd_vma p_highpc)
52 unsigned char *instructp;
53 Sym *child;
54 bfd_vma pc, destpc;
56 if (core_text_space == 0)
58 return;
60 if (p_lowpc < s_lowpc)
62 p_lowpc = s_lowpc;
64 if (p_highpc > s_highpc)
66 p_highpc = s_highpc;
68 DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
69 parent->name, (unsigned long) p_lowpc,
70 (unsigned long) p_highpc));
72 for (pc = p_lowpc; pc < p_highpc; ++pc)
74 instructp = (unsigned char *) core_text_space + pc - core_text_sect->vma;
75 if (i386_iscall (instructp))
77 DBG (CALLDEBUG,
78 printf ("[findcall]\t0x%lx:call", (unsigned long) pc));
80 * regular pc relative addressing
81 * check that this is the address of
82 * a function.
85 destpc = bfd_get_32 (core_bfd, instructp + 1) + pc + 5;
86 if (destpc >= s_lowpc && destpc <= s_highpc)
88 child = sym_lookup (&symtab, destpc);
89 if (child && child->addr == destpc)
92 * a hit
94 DBG (CALLDEBUG,
95 printf ("\tdestpc 0x%lx (%s)\n",
96 (unsigned long) destpc, child->name));
97 arc_add (parent, child, (unsigned long) 0);
98 instructp += 4; /* call is a 5 byte instruction */
99 continue;
103 * else:
104 * it looked like a callf, but it:
105 * a) wasn't actually a callf, or
106 * b) didn't point to a known function in the symtab, or
107 * c) something funny is going on.
109 DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));