| 1 | /*
|
|---|
| 2 | * Copyright (c) 2016 Jiri Svoboda
|
|---|
| 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 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup generic
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 |
|
|---|
| 33 | /**
|
|---|
| 34 | * @file
|
|---|
| 35 | * @brief Userspace ELF loader.
|
|---|
| 36 | */
|
|---|
| 37 |
|
|---|
| 38 | #include <elf/elf_load.h>
|
|---|
| 39 | #include <elf/elf_mod.h>
|
|---|
| 40 | #include <errno.h>
|
|---|
| 41 | #include <stdio.h>
|
|---|
| 42 | #include <stdlib.h>
|
|---|
| 43 | #include <vfs/vfs.h>
|
|---|
| 44 |
|
|---|
| 45 | #ifdef CONFIG_RTLD
|
|---|
| 46 | #include <rtld/rtld.h>
|
|---|
| 47 | #endif
|
|---|
| 48 |
|
|---|
| 49 | #define DPRINTF(...)
|
|---|
| 50 |
|
|---|
| 51 | /** Load ELF program.
|
|---|
| 52 | *
|
|---|
| 53 | * @param file File handle
|
|---|
| 54 | * @param info Place to store ELF program information
|
|---|
| 55 | * @return EE_OK on success or an EE_x error code
|
|---|
| 56 | */
|
|---|
| 57 | int elf_load(int file, elf_info_t *info)
|
|---|
| 58 | {
|
|---|
| 59 | #ifdef CONFIG_RTLD
|
|---|
| 60 | rtld_t *env;
|
|---|
| 61 | #endif
|
|---|
| 62 | int rc;
|
|---|
| 63 |
|
|---|
| 64 | rc = elf_load_file(file, 0, &info->finfo);
|
|---|
| 65 | if (rc != EE_OK) {
|
|---|
| 66 | DPRINTF("Failed to load executable '%s'.\n", file_name);
|
|---|
| 67 | return rc;
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 | if (info->finfo.dynamic == NULL) {
|
|---|
| 71 | /* Statically linked program */
|
|---|
| 72 | DPRINTF("Binary is statically linked.\n");
|
|---|
| 73 | info->env = NULL;
|
|---|
| 74 | return EE_OK;
|
|---|
| 75 | }
|
|---|
| 76 |
|
|---|
| 77 | DPRINTF("Binary is dynamically linked.\n");
|
|---|
| 78 | #ifdef CONFIG_RTLD
|
|---|
| 79 | DPRINTF("- prog dynamic: %p\n", info->finfo.dynamic);
|
|---|
| 80 |
|
|---|
| 81 | errno_t rc2 = rtld_prog_process(&info->finfo, &env);
|
|---|
| 82 | switch (rc2) {
|
|---|
| 83 | case EOK:
|
|---|
| 84 | rc = EE_OK;
|
|---|
| 85 | break;
|
|---|
| 86 | case ENOMEM:
|
|---|
| 87 | rc = EE_MEMORY;
|
|---|
| 88 | break;
|
|---|
| 89 | default:
|
|---|
| 90 | DPRINTF("Unexpected error code from rtld_prog_process(): %s\n", str_error_name(rc2));
|
|---|
| 91 | rc = EE_INVALID;
|
|---|
| 92 | }
|
|---|
| 93 |
|
|---|
| 94 | info->env = env;
|
|---|
| 95 | #else
|
|---|
| 96 | rc = EE_UNSUPPORTED;
|
|---|
| 97 | #endif
|
|---|
| 98 | return rc;
|
|---|
| 99 | }
|
|---|
| 100 |
|
|---|
| 101 | /** Set ELF-related PCB entries.
|
|---|
| 102 | *
|
|---|
| 103 | * Fills the program control block @a pcb with information from
|
|---|
| 104 | * @a info.
|
|---|
| 105 | *
|
|---|
| 106 | * @param info Program info structure
|
|---|
| 107 | * @param pcb PCB
|
|---|
| 108 | */
|
|---|
| 109 | void elf_set_pcb(elf_info_t *info, pcb_t *pcb)
|
|---|
| 110 | {
|
|---|
| 111 | pcb->entry = info->finfo.entry;
|
|---|
| 112 | pcb->dynamic = info->finfo.dynamic;
|
|---|
| 113 | pcb->rtld_runtime = info->env;
|
|---|
| 114 | }
|
|---|
| 115 |
|
|---|
| 116 | /** @}
|
|---|
| 117 | */
|
|---|
