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/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <sys/types.h> 30 #include <sys/efi.h> 31 #include <sys/efiio.h> 32 #include <sys/param.h> 33 #include <sys/stat.h> 34 #include <err.h> 35 #include <fcntl.h> 36 #include <getopt.h> 37 #include <stdbool.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <sysexits.h> 42 #include <unistd.h> 43 #include <uuid.h> 44 #include <libxo/xo.h> 45 46 #define TABLE_MAX_LEN 30 47 #define EFITABLE_XO_VERSION "1" 48 49 static void efi_table_print_esrt(const void *data); 50 static void efi_table_print_prop(const void *data); 51 static void usage(void); 52 53 struct efi_table_op { 54 char name[TABLE_MAX_LEN]; 55 void (*parse) (const void *); 56 struct uuid uuid; 57 }; 58 59 static const struct efi_table_op efi_table_ops[] = { 60 { .name = "esrt", .parse = efi_table_print_esrt, 61 .uuid = EFI_TABLE_ESRT }, 62 { .name = "prop", .parse = efi_table_print_prop, 63 .uuid = EFI_PROPERTIES_TABLE } 64 }; 65 66 int 67 main(int argc, char **argv) 68 { 69 struct efi_get_table_ioc table = { 70 .buf = NULL, 71 .buf_len = 0, 72 .table_len = 0 73 }; 74 int efi_fd, ch, rc = 1, efi_idx = -1; 75 bool got_table = false; 76 bool table_set = false; 77 bool uuid_set = false; 78 struct option longopts[] = { 79 { "uuid", required_argument, NULL, 'u' }, 80 { "table", required_argument, NULL, 't' }, 81 { NULL, 0, NULL, 0 } 82 }; 83 84 argc = xo_parse_args(argc, argv); 85 if (argc < 0) 86 exit(EXIT_FAILURE); 87 88 while ((ch = getopt_long(argc, argv, "u:t:", longopts, NULL)) != -1) { 89 switch (ch) { 90 case 'u': 91 { 92 char *uuid_str = optarg; 93 struct uuid uuid; 94 uint32_t status; 95 96 uuid_set = 1; 97 98 uuid_from_string(uuid_str, &uuid, &status); 99 if (status != uuid_s_ok) 100 xo_errx(EX_DATAERR, "invalid UUID"); 101 102 for (size_t n = 0; n < nitems(efi_table_ops); n++) { 103 if (!memcmp(&uuid, &efi_table_ops[n].uuid, 104 sizeof(uuid))) { 105 efi_idx = n; 106 got_table = true; 107 break; 108 } 109 } 110 break; 111 } 112 case 't': 113 { 114 char *table_name = optarg; 115 116 table_set = true; 117 118 for (size_t n = 0; n < nitems(efi_table_ops); n++) { 119 if (!strcmp(table_name, 120 efi_table_ops[n].name)) { 121 efi_idx = n; 122 got_table = true; 123 break; 124 } 125 } 126 127 if (!got_table) 128 xo_errx(EX_DATAERR, "unsupported efi table"); 129 130 break; 131 } 132 default: 133 usage(); 134 } 135 } 136 137 if (!table_set && !uuid_set) 138 xo_errx(EX_USAGE, "table is not set"); 139 140 if (!got_table) 141 xo_errx(EX_DATAERR, "unsupported table"); 142 143 efi_fd = open("/dev/efi", O_RDWR); 144 if (efi_fd < 0) 145 xo_err(EX_OSFILE, "/dev/efi"); 146 147 table.uuid = efi_table_ops[efi_idx].uuid; 148 if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1) 149 xo_err(EX_OSERR, "EFIIOC_GET_TABLE (len == 0)"); 150 151 table.buf = malloc(table.table_len); 152 table.buf_len = table.table_len; 153 154 if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1) 155 xo_err(EX_OSERR, "EFIIOC_GET_TABLE"); 156 157 efi_table_ops[efi_idx].parse(table.buf); 158 close(efi_fd); 159 160 return (rc); 161 } 162 163 static void 164 efi_table_print_esrt(const void *data) 165 { 166 const struct efi_esrt_entry_v1 *entries_v1; 167 const struct efi_esrt_table *esrt; 168 169 esrt = (const struct efi_esrt_table *)data; 170 171 xo_set_version(EFITABLE_XO_VERSION); 172 xo_open_container("esrt"); 173 xo_emit("{Lwc:FwResourceCount}{:fw_resource_count/%u}\n", 174 esrt->fw_resource_count); 175 xo_emit("{Lwc:FwResourceCountMax}{:fw_resource_count_max/%u}\n", 176 esrt->fw_resource_count_max); 177 xo_emit("{Lwc:FwResourceVersion}{:fw_resource_version/%u}\n", 178 esrt->fw_resource_version); 179 xo_open_list("entries"); 180 xo_emit("\nEntries:\n"); 181 182 entries_v1 = (const void *) esrt->entries; 183 for (uint32_t i = 0; i < esrt->fw_resource_count; i++) { 184 const struct efi_esrt_entry_v1 *e = &entries_v1[i]; 185 uint32_t status; 186 char *uuid; 187 188 uuid_to_string(&e->fw_class, &uuid, &status); 189 if (status != uuid_s_ok) { 190 xo_errx(EX_DATAERR, "uuid_to_string error"); 191 } 192 193 xo_open_instance("entries"); 194 xo_emit("\n"); 195 xo_emit("{P: }{Lwc:FwClass}{:fw_class/%s}\n", uuid); 196 xo_emit("{P: }{Lwc:FwType}{:fw_type/%u}\n", e->fw_type); 197 xo_emit("{P: }{Lwc:FwVersion}{:fw_version/%u}\n", 198 e->fw_version); 199 xo_emit("{P: }{Lwc:LowestSupportedFwVersion}" 200 "{:lowest_supported_fw_version/%u}\n", 201 e->lowest_supported_fw_version); 202 xo_emit("{P: }{Lwc:CapsuleFlags}{:capsule_flags/%#x}\n", 203 e->capsule_flags); 204 xo_emit("{P: }{Lwc:LastAttemptVersion" 205 "}{:last_attempt_version/%u}\n", e->last_attempt_version); 206 xo_emit("{P: }{Lwc:LastAttemptStatus" 207 "}{:last_attempt_status/%u}\n", e->last_attempt_status); 208 209 xo_close_instance("entries"); 210 } 211 212 xo_close_list("entries"); 213 xo_close_container("esrt"); 214 xo_finish(); 215 } 216 217 static void 218 efi_table_print_prop(const void *data) 219 { 220 const struct efi_prop_table *prop; 221 222 prop = (const struct efi_prop_table *)data; 223 224 xo_set_version(EFITABLE_XO_VERSION); 225 xo_open_container("prop"); 226 xo_emit("{Lwc:Version}{:version/%#x}\n", prop->version); 227 xo_emit("{Lwc:Length}{:length/%u}\n", prop->length); 228 xo_emit("{Lwc:MemoryProtectionAttribute}" 229 "{:memory_protection_attribute/%#lx}\n", 230 prop->memory_protection_attribute); 231 xo_close_container("prop"); 232 xo_finish(); 233 } 234 235 static void usage(void) 236 { 237 xo_error("usage: efitable [-d uuid | -t name] [--libxo]\n"); 238 exit(EX_USAGE); 239 } 240