mirror of
https://github.com/yuzu-emu/mbedtls.git
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bab7ef4f0d
The baremetal configuration is, among other things, our default reference point for code size measurements. So disable debugging features that would not be enabled in production where code size is limited. In particular, this shrinks the core SSL modules by about half. Keep debugging features that are solely in their own modules (MBEDTLS_ERROR_C, MBEDTLS_VERSION_FEATURES) since it's easy to filter them out. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
340 lines
11 KiB
Perl
Executable file
340 lines
11 KiB
Perl
Executable file
#!/usr/bin/env perl
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#
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# Copyright The Mbed TLS Contributors
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# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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#
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# This file is provided under the Apache License 2.0, or the
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# GNU General Public License v2.0 or later.
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#
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# **********
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# Apache License 2.0:
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# **********
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#
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# **********
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# GNU General Public License v2.0 or later:
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# **********
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#
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# Purpose
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#
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# Comments and uncomments #define lines in the given header file and optionally
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# sets their value or can get the value. This is to provide scripting control of
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# what preprocessor symbols, and therefore what build time configuration flags
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# are set in the 'config.h' file.
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#
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# Usage: config.pl [-f <file> | --file <file>] [-o | --force]
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# [set <symbol> <value> | unset <symbol> | get <symbol> |
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# full | realfull]
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#
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# Full usage description provided below.
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#
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# The following options are disabled instead of enabled with "full".
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#
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# * Options that require additional build dependencies or unusual hardware.
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# * Options that make testing less effective.
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# * Options that are incompatible with other options, or more generally that
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# interact with other parts of the code in such a way that a bulk enabling
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# is not a good way to test them.
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# * Options that remove features.
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#
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# The baremetal configuration excludes options that require a library or
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# operating system feature that is typically not present on bare metal
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# systems. It also excludes debugging features that increase the code size
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# of other modules.
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# Features that are excluded from "full" won't be in "baremetal" either.
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use warnings;
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use strict;
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my $config_file = "include/mbedtls/config.h";
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my $usage = <<EOU;
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$0 [-f <file> | --file <file>] [-o | --force]
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[set <symbol> <value> | unset <symbol> | get <symbol> |
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full | realfull | baremetal]
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Commands
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set <symbol> [<value>] - Uncomments or adds a #define for the <symbol> to
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the configuration file, and optionally making it
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of <value>.
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If the symbol isn't present in the file an error
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is returned.
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unset <symbol> - Comments out the #define for the given symbol if
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present in the configuration file.
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get <symbol> - Finds the #define for the given symbol, returning
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an exitcode of 0 if the symbol is found, and 1 if
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not. The value of the symbol is output if one is
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specified in the configuration file.
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full - Uncomments all #define's in the configuration file
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excluding some reserved symbols, until the
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'Module configuration options' section
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realfull - Uncomments all #define's with no exclusions
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baremetal - Sets full configuration suitable for baremetal build.
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Options
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-f | --file <filename> - The file or file path for the configuration file
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to edit. When omitted, the following default is
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used:
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$config_file
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-o | --force - If the symbol isn't present in the configuration
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file when setting its value, a #define is
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appended to the end of the file.
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EOU
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my @excluded = qw(
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MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
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MBEDTLS_DEPRECATED_REMOVED
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MBEDTLS_DEPRECATED_WARNING
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MBEDTLS_ECP_NO_INTERNAL_RNG
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MBEDTLS_HAVE_SSE2
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MBEDTLS_MEMORY_BACKTRACE
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MBEDTLS_MEMORY_BUFFER_ALLOC_C
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MBEDTLS_MEMORY_DEBUG
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MBEDTLS_NO_64BIT_MULTIPLICATION
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MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
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MBEDTLS_NO_PLATFORM_ENTROPY
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MBEDTLS_NO_UDBL_DIVISION
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MBEDTLS_PKCS11_C
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MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
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MBEDTLS_REMOVE_3DES_CIPHERSUITES
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MBEDTLS_REMOVE_ARC4_CIPHERSUITES
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MBEDTLS_RSA_NO_CRT
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MBEDTLS_SSL_HW_RECORD_ACCEL
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MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN
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MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND
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MBEDTLS_TEST_NULL_ENTROPY
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MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
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MBEDTLS_ZLIB_SUPPORT
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_ALT\s*$
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);
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# Things that should be disabled in "baremetal"
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my @excluded_baremetal = qw(
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MBEDTLS_DEBUG_C
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MBEDTLS_ENTROPY_NV_SEED
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MBEDTLS_FS_IO
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MBEDTLS_HAVEGE_C
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MBEDTLS_HAVE_TIME
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MBEDTLS_HAVE_TIME_DATE
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MBEDTLS_MEMORY_BACKTRACE
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MBEDTLS_MEMORY_BUFFER_ALLOC_C
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MBEDTLS_NET_C
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MBEDTLS_PLATFORM_FPRINTF_ALT
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MBEDTLS_PLATFORM_NV_SEED_ALT
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MBEDTLS_PLATFORM_TIME_ALT
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MBEDTLS_TEST_HOOKS
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MBEDTLS_THREADING_C
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MBEDTLS_THREADING_PTHREAD
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MBEDTLS_TIMING_C
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);
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# Things that should be enabled in "full" even if they match @excluded.
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# Platform ALTs enable global variables that allow configuring the behavior
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# but default to the default behavior, except for PLATFORM_SETUP_TEARDOWN_ALT
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# which requires the application to provide relevant functions like
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# non-platform ALTs.
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my @non_excluded = qw(
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PLATFORM_(?!SETUP_TEARDOWN_)[A-Z_0-9]+_ALT
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);
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# Things that should be enabled in "baremetal"
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my @non_excluded_baremetal = qw(
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MBEDTLS_NO_PLATFORM_ENTROPY
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);
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# Process the command line arguments
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my $force_option = 0;
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my ($arg, $name, $value, $action);
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while ($arg = shift) {
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# Check if the argument is an option
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if ($arg eq "-f" || $arg eq "--file") {
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$config_file = shift;
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-f $config_file or die "No such file: $config_file\n";
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}
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elsif ($arg eq "-o" || $arg eq "--force") {
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$force_option = 1;
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}
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else
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{
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# ...else assume it's a command
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$action = $arg;
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if ($action eq "full" || $action eq "realfull" || $action eq "baremetal" ) {
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# No additional parameters
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die $usage if @ARGV;
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}
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elsif ($action eq "unset" || $action eq "get") {
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die $usage unless @ARGV;
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$name = shift;
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}
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elsif ($action eq "set") {
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die $usage unless @ARGV;
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$name = shift;
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$value = shift if @ARGV;
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}
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else {
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die "Command '$action' not recognised.\n\n".$usage;
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}
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}
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}
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# If no command was specified, exit...
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if ( not defined($action) ){ die $usage; }
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# Check the config file is present
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if (! -f $config_file) {
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chdir '..' or die;
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# Confirm this is the project root directory and try again
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if ( !(-d 'scripts' && -d 'include' && -d 'library' && -f $config_file) ) {
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die "If no file specified, must be run from the project root or scripts directory.\n";
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}
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}
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# Now read the file and process the contents
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open my $config_read, '<', $config_file or die "read $config_file: $!\n";
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my @config_lines = <$config_read>;
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close $config_read;
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# Add required baremetal symbols to the list that is included.
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if ( $action eq "baremetal" ) {
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@non_excluded = ( @non_excluded, @non_excluded_baremetal );
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}
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my ($exclude_re, $no_exclude_re, $exclude_baremetal_re);
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if ($action eq "realfull") {
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$exclude_re = qr/^$/;
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$no_exclude_re = qr/./;
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} else {
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$exclude_re = join '|', @excluded;
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$no_exclude_re = join '|', @non_excluded;
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}
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if ( $action eq "baremetal" ) {
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$exclude_baremetal_re = join '|', @excluded_baremetal;
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}
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my $config_write = undef;
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if ($action ne "get") {
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open $config_write, '>', $config_file or die "write $config_file: $!\n";
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}
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my $done;
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for my $line (@config_lines) {
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if ($action eq "full" || $action eq "realfull" || $action eq "baremetal" ) {
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if ($line =~ /name SECTION: Module configuration options/) {
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$done = 1;
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}
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if (!$done && $line =~ m!^//\s?#define! &&
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( $line !~ /$exclude_re/ || $line =~ /$no_exclude_re/ ) &&
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( $action ne "baremetal" || ( $line !~ /$exclude_baremetal_re/ ) ) ) {
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$line =~ s!^//\s?!!;
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}
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if (!$done && $line =~ m!^\s?#define! &&
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! ( ( $line !~ /$exclude_re/ || $line =~ /$no_exclude_re/ ) &&
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( $action ne "baremetal" || ( $line !~ /$exclude_baremetal_re/ ) ) ) ) {
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$line =~ s!^!//!;
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}
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} elsif ($action eq "unset") {
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if (!$done && $line =~ /^\s*#define\s*$name\b/) {
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$line = '//' . $line;
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$done = 1;
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}
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} elsif (!$done && $action eq "set") {
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if ($line =~ m!^(?://)?\s*#define\s*$name\b!) {
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$line = "#define $name";
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$line .= " $value" if defined $value && $value ne "";
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$line .= "\n";
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$done = 1;
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}
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} elsif (!$done && $action eq "get") {
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if ($line =~ /^\s*#define\s*$name(?:\s+(.*?))\s*(?:$|\/\*|\/\/)/) {
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$value = $1;
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$done = 1;
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}
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}
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if (defined $config_write) {
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print $config_write $line or die "write $config_file: $!\n";
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}
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}
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# Did the set command work?
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if ($action eq "set" && $force_option && !$done) {
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# If the force option was set, append the symbol to the end of the file
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my $line = "#define $name";
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$line .= " $value" if defined $value && $value ne "";
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$line .= "\n";
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$done = 1;
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print $config_write $line or die "write $config_file: $!\n";
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}
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if (defined $config_write) {
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close $config_write or die "close $config_file: $!\n";
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}
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if ($action eq "get") {
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if ($done) {
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if ($value ne '') {
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print "$value\n";
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}
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exit 0;
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} else {
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# If the symbol was not found, return an error
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exit 1;
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}
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}
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if ($action eq "full" && !$done) {
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die "Configuration section was not found in $config_file\n";
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}
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if ($action ne "full" && $action ne "unset" && !$done) {
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die "A #define for the symbol $name was not found in $config_file\n";
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}
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__END__
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