Home | History | Annotate | Line # | Download | only in dist 
      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
     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 *
     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
     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