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Add efitable(8), a userspace tool to fetch and parse EFI tables
Only ESRT and PROP tables are handled at the moment. Submitted by: Pavel Balaev <pavel.balaev@3mdeb.com> MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D30104
This commit is contained in:
Pavel Balaev
Konstantin Belousov
parent
d12d651f86
commit
24f398e7a1
@ -127,7 +127,7 @@ SUBDIR.${MK_OPENSSL}+= certctl
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.endif
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SUBDIR.${MK_CXGBETOOL}+= cxgbetool
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SUBDIR.${MK_DIALOG}+= bsdconfig
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SUBDIR.${MK_EFI}+= efivar efidp efibootmgr
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SUBDIR.${MK_EFI}+= efivar efidp efibootmgr efitable
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.if ${MK_OPENSSL} != "no"
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SUBDIR.${MK_EFI}+= uefisign
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.endif
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9
usr.sbin/efitable/Makefile
Normal file
9
usr.sbin/efitable/Makefile
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@ -0,0 +1,9 @@
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# $FreeBSD$
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PROG= efitable
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MAN= efitable.8
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SRCS= efitable.c
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LIBADD= xo
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.include <bsd.prog.mk>
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70
usr.sbin/efitable/efitable.8
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70
usr.sbin/efitable/efitable.8
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@ -0,0 +1,70 @@
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.\"
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.\" Copyright (c) 2021 3mdeb Embedded Systems Consulting <contact@3mdeb.com>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 10, 2021
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.Dt EFITABLE 8
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.Os
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.Sh NAME
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.Nm efitable
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.Nd Dump UEFI tables
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.Sh SYNOPSIS
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.Nm
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.Op Fl u Ar uuid | Fl t Ar name
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.Op Fl -libxo
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.Sh DESCRIPTION
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This program prints data from
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.Dq Unified Extensible Firmware Interface
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.Pq UEFI
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tables.
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.Pp
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The following options are available:
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.Bl -tag -width 20m
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.It Fl -libxo
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Generate output via
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.Xr libxo 3
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in a selection of different human and machine readable formats.
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See
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.Xr xo_parse_args 3
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for details on command line arguments.
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.It Fl t Ar name Fl -table Ar name
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Specify the name of the table to print.
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Currently supported tables:
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.Pp
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.Bl -tag -width indent -compact
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.It Cm esrt
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EFI System Resource Table
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.It Cm prop
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EFI Properties Table
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.El
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.It Fl Ar uuid Fl -uuid Ar uuid
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Specify the UUID of the table to print.
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.El
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.Pp
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 14.0 .
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239
usr.sbin/efitable/efitable.c
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239
usr.sbin/efitable/efitable.c
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@ -0,0 +1,239 @@
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/*-
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* Copyright (c) 2021 3mdeb Embedded Systems Consulting <contact@3mdeb.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/efi.h>
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#include <sys/efiio.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <uuid.h>
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#include <libxo/xo.h>
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#define TABLE_MAX_LEN 30
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#define EFITABLE_XO_VERSION "1"
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static void efi_table_print_esrt(const void *data);
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static void efi_table_print_prop(const void *data);
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static void usage(void);
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struct efi_table_op {
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char name[TABLE_MAX_LEN];
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void (*parse) (const void *);
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struct uuid uuid;
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};
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static const struct efi_table_op efi_table_ops[] = {
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{ .name = "esrt", .parse = efi_table_print_esrt,
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.uuid = EFI_TABLE_ESRT },
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{ .name = "prop", .parse = efi_table_print_prop,
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.uuid = EFI_PROPERTIES_TABLE }
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};
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int
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main(int argc, char **argv)
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{
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struct efi_get_table_ioc table = {
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.buf = NULL,
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.buf_len = 0,
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.table_len = 0
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};
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int efi_fd, ch, rc = 1, efi_idx = -1;
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bool got_table = false;
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bool table_set = false;
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bool uuid_set = false;
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struct option longopts[] = {
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{ "uuid", required_argument, NULL, 'u' },
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{ "table", required_argument, NULL, 't' },
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{ NULL, 0, NULL, 0 }
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};
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argc = xo_parse_args(argc, argv);
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if (argc < 0)
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exit(EXIT_FAILURE);
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while ((ch = getopt_long(argc, argv, "u:t:", longopts, NULL)) != -1) {
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switch (ch) {
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case 'u':
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{
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char *uuid_str = optarg;
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struct uuid uuid;
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uint32_t status;
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uuid_set = 1;
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uuid_from_string(uuid_str, &uuid, &status);
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if (status != uuid_s_ok)
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xo_errx(EX_DATAERR, "invalid UUID");
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for (size_t n = 0; n < nitems(efi_table_ops); n++) {
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if (!memcmp(&uuid, &efi_table_ops[n].uuid,
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sizeof(uuid))) {
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efi_idx = n;
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got_table = true;
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break;
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}
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}
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break;
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}
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case 't':
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{
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char *table_name = optarg;
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table_set = true;
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for (size_t n = 0; n < nitems(efi_table_ops); n++) {
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if (!strcmp(table_name,
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efi_table_ops[n].name)) {
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efi_idx = n;
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got_table = true;
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break;
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}
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}
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if (!got_table)
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xo_errx(EX_DATAERR, "unsupported efi table");
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break;
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}
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default:
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usage();
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}
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}
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if (!table_set && !uuid_set)
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xo_errx(EX_USAGE, "table is not set");
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if (!got_table)
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xo_errx(EX_DATAERR, "unsupported table");
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efi_fd = open("/dev/efi", O_RDWR);
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if (efi_fd < 0)
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xo_err(EX_OSFILE, "/dev/efi");
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table.uuid = efi_table_ops[efi_idx].uuid;
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if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1)
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xo_err(EX_OSERR, NULL);
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table.buf = malloc(table.table_len);
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table.buf_len = table.table_len;
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if (ioctl(efi_fd, EFIIOC_GET_TABLE, &table) == -1)
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xo_err(EX_OSERR, NULL);
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efi_table_ops[efi_idx].parse(table.buf);
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close(efi_fd);
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return (rc);
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}
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static void
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efi_table_print_esrt(const void *data)
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{
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const struct efi_esrt_entry_v1 *entries_v1;
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const struct efi_esrt_table *esrt;
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esrt = (const struct efi_esrt_table *)data;
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xo_set_version(EFITABLE_XO_VERSION);
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xo_open_container("esrt");
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xo_emit("{Lwc:FwResourceCount}{:fw_resource_count/%u}\n",
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esrt->fw_resource_count);
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xo_emit("{Lwc:FwResourceCountMax}{:fw_resource_count_max/%u}\n",
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esrt->fw_resource_count_max);
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xo_emit("{Lwc:FwResourceVersion}{:fw_resource_version/%u}\n",
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esrt->fw_resource_version);
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xo_open_list("entries");
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xo_emit("\nEntries:\n");
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entries_v1 = (const void *) esrt->entries;
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for (uint32_t i = 0; i < esrt->fw_resource_count; i++) {
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const struct efi_esrt_entry_v1 *e = &entries_v1[i];
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uint32_t status;
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char *uuid;
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uuid_to_string(&e->fw_class, &uuid, &status);
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if (status != uuid_s_ok) {
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xo_errx(EX_DATAERR, "uuid_to_string error");
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}
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xo_open_instance("entries");
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xo_emit("\n");
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xo_emit("{P: }{Lwc:FwClass}{:fw_class/%s}\n", uuid);
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xo_emit("{P: }{Lwc:FwType}{:fw_type/%u}\n", e->fw_type);
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xo_emit("{P: }{Lwc:FwVersion}{:fw_version/%u}\n",
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e->fw_version);
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xo_emit("{P: }{Lwc:LowestSupportedFwVersion}"
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"{:lowest_supported_fw_version/%u}\n",
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e->lowest_supported_fw_version);
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xo_emit("{P: }{Lwc:CapsuleFlags}{:capsule_flags/%#x}\n",
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e->capsule_flags);
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xo_emit("{P: }{Lwc:LastAttemptVersion"
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"}{:last_attempt_version/%u}\n", e->last_attempt_version);
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xo_emit("{P: }{Lwc:LastAttemptStatus"
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"}{:last_attempt_status/%u}\n", e->last_attempt_status);
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xo_close_instance("entries");
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}
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xo_close_list("entries");
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xo_close_container("esrt");
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xo_finish();
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}
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static void
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efi_table_print_prop(const void *data)
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{
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const struct efi_prop_table *prop;
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prop = (const struct efi_prop_table *)data;
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xo_set_version(EFITABLE_XO_VERSION);
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xo_open_container("prop");
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xo_emit("{Lwc:Version}{:version/%#x}\n", prop->version);
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xo_emit("{Lwc:Length}{:length/%u}\n", prop->length);
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xo_emit("{Lwc:MemoryProtectionAttribute}"
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"{:memory_protection_attribute/%#lx}\n",
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prop->memory_protection_attribute);
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xo_close_container("prop");
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xo_finish();
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}
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static void usage(void)
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{
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xo_error("usage: efitable [-d uuid | -t name] [--libxo]\n");
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exit(EX_USAGE);
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}
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