assimilate nvmutil
Leah Rowe
parent
8740404e4e
commit
b3b3642fe2
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@ -25,24 +25,13 @@ Modify_gbe(){
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printf "changing mac address in gbe to ${new_mac}\n"
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_gbe_location=${CONFIG_GBE_BIN_PATH#../../}
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if [ ! -d nvmutil/ ]; then
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git clone https://notabug.org/osboot/nvmutil
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if [ ! -d nvmutil/ ]; then
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printf "E: could not download nvmutil"
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exit 1
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fi
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(
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cd nvmutil/
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git reset --hard 886a5ffb0d68a1e9627b1ecb7e4ab30bf6c66c21
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)
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fi
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if [ ! -f nvmutil/nvm ]; then
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( cd nvmutil/ && make )
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if [ ! -f util/nvmutil/nvm ]; then
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( cd util/nvmutil/ && make )
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fi
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_gbe_tmp=$(mktemp -t gbeXXXX.bin)
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cp ${_gbe_location} ${_gbe_tmp}
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./nvmutil/nvm ${_gbe_tmp} setmac ${new_mac} || Error_out 'failed to modify mac address\nmake sure the mac address in the correct format'
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./util/nvmutil/nvm ${_gbe_tmp} setmac ${new_mac} || Error_out 'failed to modify mac address\nmake sure the mac address in the correct format'
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./coreboot/default/util/ifdtool/ifdtool -i GbE:${_gbe_tmp} ${rom} -O ${rom} || exit 1
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@ -0,0 +1 @@
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Leah Rowe
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@ -0,0 +1,20 @@
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Copyright (C) 2022 Leah Rowe <info@minifree.org>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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@ -0,0 +1,8 @@
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This change log has moved. Please refer here for historical pre-osboot-merge
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changes:
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<https://libreboot.org/docs/install/nvmutilimport.html>
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Osboot merged with Libreboot on November 17th, 2022. For nvmutil changes after
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this date, please check regular Libreboot release announcements which shall
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now specify any such changes.
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@ -0,0 +1,33 @@
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#
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# Makefile for nvmutils
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#
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# Copyright (C) 2022 Leah Rowe <info@minifree.org>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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CC=cc
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CFLAGS=-Os -Wall -Wextra -Werror -pedantic
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all:
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$(CC) $(CFLAGS) nvmutil.c -o nvm
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clean:
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rm -f nvm
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@ -0,0 +1,4 @@
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This documentation has become part of lbwww. See:
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<https://libreboot.org/docs/install/nvmutil.html>
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@ -0,0 +1,319 @@
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/*
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* Copyright (C) 2022 Leah Rowe <info@minifree.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <dirent.h>
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#ifdef HAVE_PLEDGE
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#include <err.h>
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#endif
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ssize_t readFromFile(int *fd, uint8_t *buf, const char *path, int flags,
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size_t size);
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void setmac(const char *strMac);
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void cmd(const char *command);
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int validChecksum(int partnum);
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uint16_t word(int pos16, int partnum);
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void setWord(int pos16, int partnum, uint16_t val);
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void byteswap(uint8_t *byte);
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#define FILENAME argv[1]
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#define COMMAND argv[2]
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#define MAC_ADDRESS argv[3]
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#define PARTNUM argv[3]
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#define SIZE_4KB 0x1000
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#define SIZE_8KB 0x2000
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uint8_t gbe[SIZE_8KB];
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int part, modified = 0;
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uint16_t test;
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uint8_t little_endian;
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int
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main(int argc, char *argv[])
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{
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int fd;
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int flags = O_RDWR;
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char *strMac = NULL;
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char *strRMac = "??:??:??:??:??:??";
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test = 1;
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little_endian = ((uint8_t *) &test)[0];
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#ifdef HAVE_PLEDGE
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if (pledge("stdio wpath", NULL) == -1)
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err(1, "pledge");
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#endif
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if (argc == 3) {
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if (strcmp(COMMAND, "dump") == 0) {
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#ifdef HAVE_PLEDGE
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if (pledge("stdio rpath", NULL) == -1)
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err(1, "pledge");
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#endif
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flags = O_RDONLY;
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} else if (strcmp(COMMAND, "setmac") == 0) {
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strMac = strRMac;
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}
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} else if (argc == 4) {
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if (strcmp(COMMAND, "setmac") == 0)
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strMac = MAC_ADDRESS;
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else if ((!((part = PARTNUM[0] - '0') == 0 || part == 1))
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|| PARTNUM[1])
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errno = EINVAL;
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} else
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errno = EINVAL;
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if (errno != 0)
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goto nvmutil_exit;
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if (readFromFile(&fd, gbe, FILENAME, flags, SIZE_8KB)
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== SIZE_8KB)
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{
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if (strMac != NULL)
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setmac(strMac);
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else
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cmd(COMMAND);
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if (modified) {
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errno = 0;
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if (pwrite(fd, gbe, SIZE_8KB, 0) == SIZE_8KB)
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close(fd);
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}
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}
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nvmutil_exit:
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if (errno == ENOTDIR)
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errno = 0;
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if (!((errno == ECANCELED) && (flags == O_RDONLY)))
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if (errno != 0)
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fprintf(stderr, "%s\n", strerror(errno));
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return errno;
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}
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ssize_t
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readFromFile(int *fd, uint8_t *buf, const char *path, int flags, size_t size)
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{
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struct stat st;
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if (opendir(path) != NULL) {
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errno = EISDIR;
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return -1;
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} else if (((*fd) = open(path, flags)) == -1) {
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return -1;
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} else if (size == SIZE_8KB) {
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fstat((*fd), &st);
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if (st.st_size != SIZE_8KB) {
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fprintf(stderr, "Bad file size\n");
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errno = ECANCELED;
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return -1;
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}
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}
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return read((*fd), buf, size);
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}
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void
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setmac(const char *strMac)
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{
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uint8_t rmac[12];
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uint8_t o, ch, val8;
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uint16_t val16;
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int macfd, partnum, random, byte, nib;
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uint16_t mac[3] = {0, 0, 0};
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uint64_t total = 0;
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if (readFromFile(&macfd, rmac, "/dev/urandom", O_RDONLY, 12) != 12)
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return;
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else if (strnlen(strMac, 20) != 17)
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goto invalid_mac_address;
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for (o = 0, random = 0; o < 16; o += 3) {
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if (o != 15)
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if (strMac[o + 2] != ':')
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goto invalid_mac_address;
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byte = o / 3;
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for (nib = 0; nib < 2; nib++, total += val8) {
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ch = strMac[o + nib];
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if ((ch >= '0') && ch <= '9') {
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val8 = ch - '0';
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} else if ((ch >= 'A') && (ch <= 'F')) {
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val8 = ch - 'A' + 10;
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} else if ((ch >= 'a') && (ch <= 'f')) {
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val8 = ch - 'a' + 10;
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} else if (ch == '?') {
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val8 = rmac[random++] & 0xf;
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if ((byte == 0 && (nib == 1))) {
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val8 &= 0xE;
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val8 |= 2;
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}
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} else {
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goto invalid_mac_address;
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}
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val16 = val8;
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if ((byte % 2) ^ 1)
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byteswap((uint8_t *) &val16);
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val16 <<= 4 * (nib ^ 1);
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mac[byte >> 1] |= val16;
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}
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}
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test = mac[0];
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if (little_endian)
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byteswap((uint8_t *) &test);
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if (total == 0 || (((uint8_t *) &test)[0] & 1))
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goto invalid_mac_address;
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if (little_endian)
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for (o = 0; o < 3; o++)
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byteswap((uint8_t *) &mac[o]);
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for (partnum = 0; partnum < 2; partnum++) {
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if (validChecksum(partnum)) {
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for (o = 0; o < 3; o++)
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setWord(o, partnum, mac[o]);
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part = partnum;
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cmd("setchecksum");
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}
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}
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return;
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invalid_mac_address:
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fprintf(stderr, "Bad MAC address\n");
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errno = ECANCELED;
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return;
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}
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void
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cmd(const char *command)
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{
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int c, partnum, part0, part1, row, numInvalid;
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uint8_t *byte;
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uint16_t val16;
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if (strcmp(command, "dump") == 0) {
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numInvalid = 0;
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for (partnum = 0; partnum < 2; partnum++) {
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if (!validChecksum(partnum))
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++numInvalid;
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printf("Part %d:\n", partnum);
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printf("MAC: ");
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for (c = 0; c < 3; c++) {
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val16 = word(c, partnum);
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byte = (uint8_t *) &val16;
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if (!little_endian)
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byteswap(byte);
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printf("%02x:%02x", byte[0], byte[1]);
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if (c == 2)
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printf("\n");
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else
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printf(":");
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}
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for (row = 0; row < 8; row++) {
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printf("%07x ", row << 4);
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for (c = 0; c < 8; c++) {
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val16 = word((row << 3) + c, partnum);
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byte = (uint8_t *) &val16;
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if (!little_endian)
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byteswap(byte);
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printf("%02x%02x ", byte[1], byte[0]);
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}
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printf("\n");
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}
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}
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if (numInvalid < 2) {
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errno = 0;
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}
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} else if (strcmp(command, "setchecksum") == 0) {
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val16 = 0;
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for (c = 0; c < 0x3F; c++)
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val16 += word(c, part);
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setWord(0x3F, part, 0xBABA - val16);
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} else if (strcmp(command, "brick") == 0) {
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if (validChecksum(part))
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setWord(0x3F, part, (word(0x3F, part)) ^ 0xFF);
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} else if (strcmp(command, "swap") == 0) {
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part0 = validChecksum(0);
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part1 = validChecksum(1);
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if ((modified = (part0 | part1))) {
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for(part0 = 0; part0 < SIZE_4KB; part0++) {
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gbe[part0] ^= gbe[part1 = (part0 | SIZE_4KB)];
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gbe[part1] ^= gbe[part0];
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gbe[part0] ^= gbe[part1];
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}
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}
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} else if (strcmp(command, "copy") == 0) {
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if (validChecksum(part))
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memcpy(gbe + ((part ^ (modified = 1)) << 12),
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gbe + (part << 12), SIZE_4KB);
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} else
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errno = EINVAL;
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}
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int
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validChecksum(int partnum)
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{
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int w;
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uint16_t total = 0;
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for(w = 0; w <= 0x3F; w++)
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total += word(w, partnum);
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if (total != 0xBABA) {
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fprintf(stderr, "BAD checksum in part %d\n", partnum);
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errno = ECANCELED;
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return 0;
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}
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return 1;
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}
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uint16_t
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word(int pos16, int partnum)
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{
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uint16_t val16 = ((uint16_t *) gbe)[pos16 + (partnum << 11)];
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if (!little_endian)
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byteswap((uint8_t *) &val16);
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return val16;
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}
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void
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setWord(int pos16, int partnum, uint16_t val)
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{
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((uint16_t *) gbe)[pos16 + (partnum << 11)] = val;
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if (!little_endian)
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byteswap(gbe + (pos16 << 1) + (partnum << 12));
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modified = 1;
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}
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void
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byteswap(uint8_t *byte) {
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byte[0] ^= byte[1];
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byte[1] ^= byte[0];
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byte[0] ^= byte[1];
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}
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