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