1 /* 2 * Copyright (c) 2010 Konstantin Belousov <kib@freebsd.org> 3 * All rights reserved. 4 * 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. Neither the name of the author nor the names of any co-contributors 11 * may be used to endorse or promote products derived from this software 12 * without specific prior written permission. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/lib/libc/gen/elf_utils.c 217154 2011-01-08 17:13:43Z kib $ 27 */ 28 29 #include <link.h> 30 31 int __elf_phdr_match_addr(struct dl_phdr_info *, void *); 32 33 int 34 __elf_phdr_match_addr(struct dl_phdr_info *phdr_info, void *addr) 35 { 36 const Elf_Phdr *ph; 37 int i; 38 39 for (i = 0; i < phdr_info->dlpi_phnum; i++) { 40 ph = &phdr_info->dlpi_phdr[i]; 41 if (ph->p_type != PT_LOAD || (ph->p_flags & PF_X) == 0) 42 continue; 43 if (phdr_info->dlpi_addr + ph->p_vaddr <= (uintptr_t)addr && 44 (uintptr_t)addr + sizeof(addr) < phdr_info->dlpi_addr + 45 ph->p_vaddr + ph->p_memsz) 46 break; 47 } 48 return (i != phdr_info->dlpi_phnum); 49 } 50