/* * Copyright (c) 2016 Jiri Svoboda * 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. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /** @addtogroup libc * @{ */ /** * @file * @brief Userspace ELF loader. */ #include <elf/elf_load.h> #include <elf/elf_mod.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <vfs/vfs.h> #ifdef CONFIG_RTLD #include <rtld/rtld.h> #endif #define DPRINTF(...) /** Load ELF program. * * @param file File handle * @param info Place to store ELF program information * @return EOK on success or an error code */ errno_t elf_load(int file, elf_info_t *info) { #ifdef CONFIG_RTLD rtld_t *env; #endif errno_t rc; rc = elf_load_file(file, 0, &info->finfo); if (rc != EOK) { DPRINTF("Failed to load executable '%s'.\n", file_name); return rc; } if (info->finfo.dynamic == NULL) { /* Statically linked program */ DPRINTF("Binary is statically linked.\n"); info->env = NULL; return EOK; } DPRINTF("Binary is dynamically linked.\n"); #ifdef CONFIG_RTLD DPRINTF("- prog dynamic: %p\n", info->finfo.dynamic); rc = rtld_prog_process(&info->finfo, &env); info->env = env; #else rc = ENOTSUP; #endif return rc; } /** Set ELF-related PCB entries. * * Fills the program control block @a pcb with information from * @a info. * * @param info Program info structure * @param pcb PCB */ void elf_set_pcb(elf_info_t *info, pcb_t *pcb) { pcb->entry = info->finfo.entry; pcb->dynamic = info->finfo.dynamic; pcb->rtld_runtime = info->env; } /** @} */