1/*- 2 * Copyright (c) 2021 3mdeb Embedded Systems Consulting <contact@3mdeb.com> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/types.h> 27#include <sys/efi.h> 28#include <sys/efiio.h> 29#include <sys/param.h> 30#include <sys/stat.h> 31#include <fcntl.h> 32#include <getopt.h> 33#include <stdbool.h> 34#include <stdio.h> 35#include <stdlib.h> 36#include <string.h> 37#include <sysexits.h> 38#include <unistd.h> 39#include <uuid.h> 40#include <libxo/xo.h> 41 42#define TABLE_MAX_LEN 30 43#define EFITABLE_XO_VERSION "1" 44 45static void efi_table_print_esrt(const void *data); 46static void efi_table_print_prop(const void *data); 47static void usage(void) __dead2; 48 49struct efi_table_op { 50 char name[TABLE_MAX_LEN]; 51 void (*parse) (const void *); 52 struct uuid uuid; 53}; 54 55static const struct efi_table_op efi_table_ops[] = { 56 { .name = "esrt", .parse = efi_table_print_esrt, 57 .uuid = EFI_TABLE_ESRT }, 58 { .name = "prop", .parse = efi_table_print_prop, 59 .uuid = EFI_PROPERTIES_TABLE } 60}; 61 62int 63main(int argc, char **argv) 64{ 65 struct efi_get_table_ioc table = { 66 .buf = NULL, 67 .buf_len = 0, 68 .table_len = 0 69 }; 70 int efi_fd, ch, rc = 1, efi_idx = -1; 71 bool got_table = false; 72 bool table_set = false; 73 bool uuid_set = false; 74 struct option longopts[] = { 75 { "uuid", required_argument, NULL, 'u' }, 76 { "table", required_argument, NULL, 't' }, 77 { NULL, 0, NULL, 0 } 78 }; 79 80 argc = xo_parse_args(argc, argv); 81 if (argc < 0) 82 exit(EXIT_FAILURE); 83 84 while ((ch = getopt_long(argc, argv, "u:t:", longopts, NULL)) != -1) { 85 switch (ch) { 86 case 'u': 87 { 88 char *uuid_str = optarg; 89 struct uuid uuid; 90 uint32_t status; 91 92 uuid_set = 1; 93 94 uuid_from_string(uuid_str, &uuid, &status); 95 if (status != uuid_s_ok) 96 xo_errx(EX_DATAERR, "invalid UUID"); 97 98 for (size_t n = 0; n < nitems(efi_table_ops); n++) { 99 if (!memcmp(&uuid, &efi_table_ops[n].uuid, 100 sizeof(uuid))) { 101 efi_idx = n; 102 got_table = true; 103 break; 104 } 105 } 106 break; 107 } 108 case 't': 109 { 110 char *table_name = optarg; 111 112 table_set = true; 113 114 for (size_t n = 0; n < nitems(efi_table_ops); n++) { 115 if (!strcmp(table_name, 116 efi_table_ops[n].name)) { 117 efi_idx = n; 118 got_table = true; 119 break; 120 } 121 } 122 123 if (!got_table) 124 xo_errx(EX_DATAERR, "unsupported efi table"); 125 126 break; 127 } 128 default: 129 usage(); 130 } 131 } 132 133 if (!table_set && !uuid_set) 134 xo_errx(EX_USAGE, "table is not set"); 135 136 if (!got_table) 137 xo_errx(EX_DATAERR, "unsupported table"); 138 139 efi_fd = open("/dev/efi", O_RDWR); 140 if (efi_fd < 0) 141 xo_err(EX_OSFILE, "/dev/efi"); 142 143 table.uuid = efi_table_ops[efi_idx].uuid; 144 if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1) 145 xo_err(EX_OSERR, "EFIIOC_GET_TABLE (len == 0)"); 146 147 table.buf = malloc(table.table_len); 148 table.buf_len = table.table_len; 149 150 if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1) 151 xo_err(EX_OSERR, "EFIIOC_GET_TABLE"); 152 153 efi_table_ops[efi_idx].parse(table.buf); 154 close(efi_fd); 155 156 return (rc); 157} 158 159static void 160efi_table_print_esrt(const void *data) 161{ 162 const struct efi_esrt_entry_v1 *entries_v1; 163 const struct efi_esrt_table *esrt; 164 165 esrt = (const struct efi_esrt_table *)data; 166 167 xo_set_version(EFITABLE_XO_VERSION); 168 xo_open_container("esrt"); 169 xo_emit("{Lwc:FwResourceCount}{:fw_resource_count/%u}\n", 170 esrt->fw_resource_count); 171 xo_emit("{Lwc:FwResourceCountMax}{:fw_resource_count_max/%u}\n", 172 esrt->fw_resource_count_max); 173 xo_emit("{Lwc:FwResourceVersion}{:fw_resource_version/%u}\n", 174 esrt->fw_resource_version); 175 xo_open_list("entries"); 176 xo_emit("\nEntries:\n"); 177 178 entries_v1 = (const void *) esrt->entries; 179 for (uint32_t i = 0; i < esrt->fw_resource_count; i++) { 180 const struct efi_esrt_entry_v1 *e = &entries_v1[i]; 181 uint32_t status; 182 char *uuid; 183 184 uuid_to_string(&e->fw_class, &uuid, &status); 185 if (status != uuid_s_ok) { 186 xo_errx(EX_DATAERR, "uuid_to_string error"); 187 } 188 189 xo_open_instance("entries"); 190 xo_emit("\n"); 191 xo_emit("{P: }{Lwc:FwClass}{:fw_class/%s}\n", uuid); 192 xo_emit("{P: }{Lwc:FwType}{:fw_type/%u}\n", e->fw_type); 193 xo_emit("{P: }{Lwc:FwVersion}{:fw_version/%u}\n", 194 e->fw_version); 195 xo_emit("{P: }{Lwc:LowestSupportedFwVersion}" 196 "{:lowest_supported_fw_version/%u}\n", 197 e->lowest_supported_fw_version); 198 xo_emit("{P: }{Lwc:CapsuleFlags}{:capsule_flags/%#x}\n", 199 e->capsule_flags); 200 xo_emit("{P: }{Lwc:LastAttemptVersion" 201 "}{:last_attempt_version/%u}\n", e->last_attempt_version); 202 xo_emit("{P: }{Lwc:LastAttemptStatus" 203 "}{:last_attempt_status/%u}\n", e->last_attempt_status); 204 205 xo_close_instance("entries"); 206 } 207 208 xo_close_list("entries"); 209 xo_close_container("esrt"); 210 if (xo_finish() < 0) 211 xo_err(EX_IOERR, "stdout"); 212} 213 214static void 215efi_table_print_prop(const void *data) 216{ 217 const struct efi_prop_table *prop; 218 219 prop = (const struct efi_prop_table *)data; 220 221 xo_set_version(EFITABLE_XO_VERSION); 222 xo_open_container("prop"); 223 xo_emit("{Lwc:Version}{:version/%#x}\n", prop->version); 224 xo_emit("{Lwc:Length}{:length/%u}\n", prop->length); 225 xo_emit("{Lwc:MemoryProtectionAttribute}" 226 "{:memory_protection_attribute/%#lx}\n", 227 prop->memory_protection_attribute); 228 xo_close_container("prop"); 229 if (xo_finish() < 0) 230 xo_err(EX_IOERR, "stdout"); 231} 232 233static void usage(void) 234{ 235 xo_error("usage: efitable [-d uuid | -t name] [--libxo]\n"); 236 exit(EX_USAGE); 237} 238