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Diffstat (limited to 'util/ich9utils/src/ich9deblob.c')
| -rw-r--r-- | util/ich9utils/src/ich9deblob.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/util/ich9utils/src/ich9deblob.c b/util/ich9utils/src/ich9deblob.c deleted file mode 100644 index c29814f2..00000000 --- a/util/ich9utils/src/ich9deblob.c +++ /dev/null @@ -1,231 +0,0 @@ -/* - * ich9deblob.c - * This file is part of the ich9deblob utility from the libreboot project - * - * Purpose: disable and remove the ME from ich9m/gm45 systems in coreboot. - * - * Copyright (C) 2014 Steve Shenton <sgsit@libreboot.org> - * Copyright (C) 2014,2015,2019 Leah Rowe <info@minifree.org> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/* Initially based on proof of concept by Steve Shenton. */ -/* Original utility can be found at https://gitorious.org/ich9descriptortool */ - -/* - * Read a factory.rom dump (ich9m/gm45 systems) and - * modify the flash descriptor to remove all regions except descriptor, - * Gbe and BIOS. Set BIOS region to full size of the ROM image (after - * the flash descriptor and gbe). Basically, deblob the descriptor. - * - * This will will generate a concatenated descriptor+gbe dump suitable - * for use in libreboot. Currently tested: ThinkPad X200 (coreboot/libreboot) - */ - -/* - * See docs/hardware/x200_remove_me.html for info plus links to datasheet (also linked below) - * - * Info about flash descriptor (read page 845 onwards): - * http://www.intel.co.uk/content/dam/doc/datasheet/io-controller-hub-9-datasheet.pdf - * - * Info about Gbe region (read whole datasheet): - * http://www.intel.co.uk/content/dam/doc/application-note/i-o-controller-hub-9m-82567lf-lm-v-nvm-map-appl-note.pdf - * https://web.archive.org/web/20150912070329/https://communities.intel.com/community/wired/blog/2010/10/14/how-to-basic-eeprom-checksums - */ - -#include "ich9deblob.h" - -int main(int argc, char *argv[]) -{ - struct DESCRIPTORREGIONRECORD descriptorStruct; - uint8_t* descriptorBuffer = (uint8_t*)&descriptorStruct; - - struct GBEREGIONRECORD_8K gbeStruct8k; - uint8_t* gbeBuffer8k = (uint8_t*)&gbeStruct8k; - uint32_t gbeRegionStart; - - char* romFilename = "factory.rom"; - if(argc>1) { - romFilename = argv[1]; - } - - char* descriptorGbeFilename = "deblobbed_descriptor.bin"; - char* descriptorNoGbeFilename = "deblobbed_4kdescriptor.bin"; - - unsigned int bufferLength; - unsigned int romSize; - - /* - * ------------------------------------------------------------------ - * Compatibility checks. This version of ich9deblob is not yet portable. - * ------------------------------------------------------------------ - */ - - if (systemOrCompilerIncompatible(descriptorStruct, gbeStruct8k)) return 1; - /* If true, fail with error message */ - - /* - * ------------------------------------------------------------------ - * Extract the descriptor and gbe regions from the factory.rom dump - * ------------------------------------------------------------------ - */ - FILE* fp = NULL; - fp = fopen(romFilename, "rb"); /* open factory.rom */ - if (NULL == fp) - { - printf("\nerror: could not open %s\n", romFilename); - fclose(fp); - return 1; - } - printf("\n%s opened successfully\n", romFilename); - - /* - * Get the descriptor region dump from the factory.rom - * (goes in factoryDescriptorBuffer variable) - */ - bufferLength = fread(descriptorBuffer, 1, DESCRIPTORREGIONSIZE, fp); - if (DESCRIPTORREGIONSIZE != bufferLength) // - { - printf("\nerror: could not read descriptor from %s (%i) bytes read\n", romFilename, bufferLength); - fclose(fp); - return 1; - } - printf("\ndescriptor region read successfully\n"); - - if(!validDescriptor(descriptorStruct)) { - printf("Invalid input: incorrect signature in the given descriptor."); - fclose(fp); - return 1; - } - - if (descriptorDefinesGbeRegion(descriptorStruct)) - { - gbeRegionStart = descriptorStruct.regionSection.flReg3.BASE << FLREGIONBITSHIFT; - - /* - * Set offset so that we can read the data from - * the gbe region - */ - fseek(fp, gbeRegionStart, SEEK_SET); - /* Read the gbe data from the factory.rom and put it in factoryGbeBuffer8k */ - bufferLength = fread(gbeBuffer8k, 1, GBEREGIONSIZE_8K, fp); - if (GBEREGIONSIZE_8K != bufferLength) - { - printf("\nerror: could not read GBe region from %s (%i) bytes read\n", romFilename, bufferLength); - fclose(fp); - return 1; - } - printf("\ngbe (8KiB) region read successfully\n"); - } - - fseek(fp, 0L, SEEK_END); - romSize = ftell(fp); - printf("\n%s size: [%i] bytes\n", romFilename, romSize); - - fclose(fp); - - /* Debugging (before modification) */ - printDescriptorRegionLocations(descriptorStruct, "Original"); - if (descriptorDefinesGbeRegion(descriptorStruct)) - printGbeChecksumDataFromStruct8k(gbeStruct8k, "Original"); - else printf("NO GBE REGION\n"); - - /* - * ------------------------------------------------------------------ - * Modify the descriptor and gbe regions, ready to go in libreboot.rom - * ------------------------------------------------------------------ - */ - - /* Delete the ME/Platform regions, place Gbe after the descriptor, resize BIOS region to fill the gap */ - descriptorStruct = librebootDescriptorStructFromFactory(descriptorStruct, romSize); - - /* The ME is disallowed read-write access to all regions - * (this is probably redundant, since the ME firmware is already removed from libreboot) */ - descriptorStruct = descriptorMeRegionsForbidden(descriptorStruct); - /* Host/CPU is allowed to read/write all regions. - * This makes flashrom -p internal work */ - descriptorStruct = descriptorHostRegionsUnlocked(descriptorStruct); - - /* Set OEM string */ - descriptorStruct = descriptorOemString(descriptorStruct); - - /* Modify the Gbe region (see function for details) */ - if (descriptorDefinesGbeRegion(descriptorStruct)) - gbeStruct8k = deblobbedGbeStructFromFactory(gbeStruct8k); - - /* Debugging (after modifying the descriptor and gbe regions) */ - printDescriptorRegionLocations(descriptorStruct, "Modified"); - if (descriptorDefinesGbeRegion(descriptorStruct)) - printGbeChecksumDataFromStruct8k(gbeStruct8k, "Modified"); - else printf("NO GBE REGION\n"); - - /* - * ------------------------------------------------------------------ - * Create the file with the modified descriptor and gbe inside - * ------------------------------------------------------------------ - */ - printf("\n"); - if (descriptorDefinesGbeRegion(descriptorStruct)) - { - if (notCreatedDescriptorGbeFile(descriptorStruct, gbeStruct8k, descriptorGbeFilename)) { - return 1; - } - } - else - { - if (notCreated4kDescriptorFile(descriptorStruct, descriptorNoGbeFilename)) { - return 1; - } - } - - /* - * ------------------------------------------------------------------ - * Generate ich9gen data (C code that will recreate the deblobbed descriptor+gbe from scratch) - * ------------------------------------------------------------------ - */ - /* Code for generating the Descriptor struct */ - /* mkdescriptor.h */ - if (notCreatedHFileForDescriptorCFile("mkdescriptor.h", "mkdescriptor.c")) { - return 1; - } /* and now mkdescriptor.c */ - if (notCreatedCFileFromDescriptorStruct(descriptorStruct, "mkdescriptor.c", "mkdescriptor.h")) { - return 1; - } - - if (descriptorDefinesGbeRegion(descriptorStruct)) - { - /* Code for generating the Gbe struct */ - /* mkgbe.h */ - if (notCreatedHFileForGbeCFile("mkgbe.h", "mkgbe.c")) { - return 1; - } /* and now mkgbe.c */ - if (notCreatedCFileFromGbeStruct4k(gbeStruct8k.backup, "mkgbe.c", "mkgbe.h")) { - return 1; - } - } - - if (descriptorDefinesGbeRegion(descriptorStruct)) - { - printf("The modified descriptor and gbe regions have also been dumped as src files: mkdescriptor.c, mkdescriptor.h, mkgbe.c, mkgbe.h\n"); - printf("To use these in ich9gen, place them in src/ich9gen/ and re-build ich9gen.\n\n"); - } - else - { - printf("The modified descriptor region have also been dumped as src files: mkdescriptor.c, mkdescriptor.h\n"); - printf("To use these in ich9gen, place them in src/ich9gen/ and re-build ich9gen.\n\n"); - } - - return 0; -} |