/*
* 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;
}
/** @}
*/