1 /*
2 * Copyright (c) 2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Rui Paulo under sponsorship from the
6 * FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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
30 #include <sys/cdefs.h>
31 #ifdef __FBSDID
32 __FBSDID("$FreeBSD: head/lib/libproc/proc_rtld.c 265255 2014-05-03 04:44:03Z markj $");
33 #else
34 __RCSID("$NetBSD: proc_rtld.c,v 1.2 2015/09/24 14:12:48 christos Exp $");
35 #endif
36
37 #include <stdio.h>
38 #include <string.h>
39 #include <stdlib.h>
40 #include <rtld_db.h>
41 #include "libproc.h"
42 #include "_libproc.h"
43
44 static int
map_iter(const rd_loadobj_t * lop,void * arg)45 map_iter(const rd_loadobj_t *lop, void *arg)
46 {
47 struct proc_handle *phdl = arg;
48
49 if (phdl->nobjs >= phdl->rdobjsz) {
50 phdl->rdobjsz *= 2;
51 if (reallocarr(&phdl->rdobjs, sizeof(*phdl->rdobjs),
52 phdl->rdobjsz))
53 return (-1);
54 }
55 if (strcmp(lop->rdl_path, phdl->execname) == 0 &&
56 (lop->rdl_prot & RD_RDL_X) != 0)
57 phdl->rdexec = &phdl->rdobjs[phdl->nobjs];
58 memcpy(&phdl->rdobjs[phdl->nobjs++], lop, sizeof(*lop));
59
60 return (0);
61 }
62
63 rd_agent_t *
proc_rdagent(struct proc_handle * phdl)64 proc_rdagent(struct proc_handle *phdl)
65 {
66 if (phdl->rdap == NULL && phdl->status != PS_UNDEAD &&
67 phdl->status != PS_IDLE) {
68 if ((phdl->rdap = rd_new(phdl)) != NULL) {
69 phdl->rdobjs = malloc(sizeof(*phdl->rdobjs) * 64);
70 phdl->rdobjsz = 64;
71 if (phdl->rdobjs == NULL)
72 return (phdl->rdap);
73 rd_loadobj_iter(phdl->rdap, map_iter, phdl);
74 }
75 }
76
77 return (phdl->rdap);
78 }
79
80 void
proc_updatesyms(struct proc_handle * phdl)81 proc_updatesyms(struct proc_handle *phdl)
82 {
83
84 memset(phdl->rdobjs, 0, sizeof(*phdl->rdobjs) * phdl->rdobjsz);
85 phdl->nobjs = 0;
86 rd_loadobj_iter(phdl->rdap, map_iter, phdl);
87 }
88