/* * Copyright (C) 2006 The Android Open Source Project * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include /* Dynamic binaries get this from the dynamic linker (system/linker), which * we don't pull in for static bins. We also don't have a list of so's to * iterate over, since there's really only a single monolithic blob of * code/data. * * All we need to do is to find where the executable is in memory, and grab the * phdr and phnum from there. */ /* ld provides this to us in the default link script */ extern void *__executable_start; int dl_iterate_phdr(int (*cb)(struct dl_phdr_info *info, size_t size, void *data), void *data) { struct dl_phdr_info dl_info; Elf32_Ehdr *ehdr = (Elf32_Ehdr *) &__executable_start; Elf32_Phdr *phdr = (Elf32_Phdr *)((unsigned long)ehdr + ehdr->e_phoff); /* TODO: again, copied from linker.c. Find a better home for this * later. */ if (ehdr->e_ident[EI_MAG0] != ELFMAG0) return -1; if (ehdr->e_ident[EI_MAG1] != ELFMAG1) return -1; if (ehdr->e_ident[EI_MAG2] != ELFMAG2) return -1; if (ehdr->e_ident[EI_MAG3] != ELFMAG3) return -1; dl_info.dlpi_addr = 0; dl_info.dlpi_name = NULL; dl_info.dlpi_phdr = phdr; dl_info.dlpi_phnum = ehdr->e_phnum; return cb(&dl_info, sizeof (struct dl_phdr_info), data); }