diff options
Diffstat (limited to 'resources/coreboot/default/patches/0017-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch')
| -rw-r--r-- | resources/coreboot/default/patches/0017-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/resources/coreboot/default/patches/0017-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch b/resources/coreboot/default/patches/0017-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch new file mode 100644 index 00000000..6596e285 --- /dev/null +++ b/resources/coreboot/default/patches/0017-util-ifdtool-add-nuke-flag-all-0xFF-on-region.patch @@ -0,0 +1,183 @@ +From 0cf2eee19eef5270410d054cf8e26a8be99245a8 Mon Sep 17 00:00:00 2001 +From: Leah Rowe <leah@libreboot.org> +Date: Sun, 4 Dec 2022 22:35:01 +0000 +Subject: [PATCH 17/17] util/ifdtool: add --nuke flag (all 0xFF on region) + +When this option is used, the region's contents are overwritten +with all ones (0xFF). + +Example: + +./ifdtool --nuke gbe coreboot.rom +./ifdtool --nuke bios coreboot.com +./ifdtool --nuke me coreboot.com +--- + util/ifdtool/ifdtool.c | 98 ++++++++++++++++++++++++++++++++---------- + 1 file changed, 76 insertions(+), 22 deletions(-) + +diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c +index ca5d3b8d21..8ba1335772 100644 +--- a/util/ifdtool/ifdtool.c ++++ b/util/ifdtool/ifdtool.c +@@ -1640,19 +1640,68 @@ static void print_usage(const char *name) + " tgl - Tiger Lake\n" + " -S | --setpchstrap Write a PCH strap\n" + " -V | --newvalue The new value to write into PCH strap specified by -S\n" ++ " -N | --nuke <region> Overwrite the specified region with 0xFF (all ones)\n" + " -v | --version: print the version\n" + " -h | --help: print this help\n\n" + "<region> is one of Descriptor, BIOS, ME, GbE, Platform, res1, res2, res3\n" + "\n"); + } + ++static int ++get_region_type_string(const char *region_type_string) ++{ ++ if (region_type_string == NULL) ++ return -1; ++ else if (!strcasecmp("Descriptor", region_type_string)) ++ return 0; ++ else if (!strcasecmp("BIOS", region_type_string)) ++ return 1; ++ else if (!strcasecmp("ME", region_type_string)) ++ return 2; ++ else if (!strcasecmp("GbE", region_type_string)) ++ return 3; ++ else if (!strcasecmp("Platform", region_type_string)) ++ return 4; ++ else if (!strcasecmp("res1", region_type_string)) ++ return 5; ++ else if (!strcasecmp("res2", region_type_string)) ++ return 6; ++ else if (!strcasecmp("res3", region_type_string)) ++ return 7; ++ else if (!strcasecmp("EC", region_type_string)) ++ return 8; ++ else ++ return -1; ++} ++ ++ ++static void ++nuke(const char *filename, char *image, int size, int region_type) ++{ ++ int i; ++ region_t region; ++ const frba_t *frba = find_frba(image, size); ++ if (!frba) ++ exit(EXIT_FAILURE); ++ ++ region = get_region(frba, region_type); ++ if (region.size > 0) { ++ for (i = region.base; i <= region.limit; i++) { ++ if ((i + 1) > (size)) ++ break; ++ image[i] = 0xFF; ++ } ++ write_image(filename, image, size); ++ } ++} ++ + int main(int argc, char *argv[]) + { + int opt, option_index = 0; + int mode_dump = 0, mode_extract = 0, mode_inject = 0, mode_spifreq = 0; + int mode_em100 = 0, mode_locked = 0, mode_unlocked = 0, mode_validate = 0; + int mode_layout = 0, mode_newlayout = 0, mode_density = 0, mode_setstrap = 0; +- int mode_read = 0, mode_altmedisable = 0, altmedisable = 0; ++ int mode_read = 0, mode_altmedisable = 0, altmedisable = 0, mode_nuke = 0; + char *region_type_string = NULL, *region_fname = NULL; + const char *layout_fname = NULL; + char *new_filename = NULL; +@@ -1683,6 +1732,7 @@ int main(int argc, char *argv[]) + {"validate", 0, NULL, 't'}, + {"setpchstrap", 1, NULL, 'S'}, + {"newvalue", 1, NULL, 'V'}, ++ {"nuke", 1, NULL, 'N'}, + {0, 0, 0, 0} + }; + +@@ -1723,25 +1773,8 @@ int main(int argc, char *argv[]) + region_fname++; + // Descriptor, BIOS, ME, GbE, Platform + // valid type? +- if (!strcasecmp("Descriptor", region_type_string)) +- region_type = 0; +- else if (!strcasecmp("BIOS", region_type_string)) +- region_type = 1; +- else if (!strcasecmp("ME", region_type_string)) +- region_type = 2; +- else if (!strcasecmp("GbE", region_type_string)) +- region_type = 3; +- else if (!strcasecmp("Platform", region_type_string)) +- region_type = 4; +- else if (!strcasecmp("res1", region_type_string)) +- region_type = 5; +- else if (!strcasecmp("res2", region_type_string)) +- region_type = 6; +- else if (!strcasecmp("res3", region_type_string)) +- region_type = 7; +- else if (!strcasecmp("EC", region_type_string)) +- region_type = 8; +- if (region_type == -1) { ++ if ((region_type = ++ get_region_type_string(region_type_string)) == -1) { + fprintf(stderr, "No such region type: '%s'\n\n", + region_type_string); + print_usage(argv[0]); +@@ -1900,6 +1933,22 @@ int main(int argc, char *argv[]) + case 't': + mode_validate = 1; + break; ++ case 'N': ++ region_type_string = strdup(optarg); ++ if (!region_type_string) { ++ fprintf(stderr, "No region specified\n"); ++ print_usage(argv[0]); ++ exit(EXIT_FAILURE); ++ } ++ if ((region_type = ++ get_region_type_string(region_type_string)) == -1) { ++ fprintf(stderr, "No such region type: '%s'\n\n", ++ region_type_string); ++ print_usage(argv[0]); ++ exit(EXIT_FAILURE); ++ } ++ mode_nuke = 1; ++ break; + case 'v': + print_version(); + exit(EXIT_SUCCESS); +@@ -1915,7 +1964,7 @@ int main(int argc, char *argv[]) + + if ((mode_dump + mode_layout + mode_extract + mode_inject + mode_setstrap + + mode_newlayout + (mode_spifreq | mode_em100 | mode_unlocked | +- mode_locked) + mode_altmedisable + mode_validate) > 1) { ++ mode_locked) + mode_altmedisable + mode_validate + mode_nuke) > 1) { + fprintf(stderr, "You may not specify more than one mode.\n\n"); + print_usage(argv[0]); + exit(EXIT_FAILURE); +@@ -1923,7 +1972,8 @@ int main(int argc, char *argv[]) + + if ((mode_dump + mode_layout + mode_extract + mode_inject + mode_setstrap + + mode_newlayout + mode_spifreq + mode_em100 + mode_locked + +- mode_unlocked + mode_density + mode_altmedisable + mode_validate) == 0) { ++ mode_unlocked + mode_density + mode_altmedisable + mode_validate + ++ mode_nuke) == 0) { + fprintf(stderr, "You need to specify a mode.\n\n"); + print_usage(argv[0]); + exit(EXIT_FAILURE); +@@ -2021,6 +2071,10 @@ int main(int argc, char *argv[]) + write_image(new_filename, image, size); + } + ++ if (mode_nuke) { ++ nuke(new_filename, image, size, region_type); ++ } ++ + if (mode_altmedisable) { + fpsba_t *fpsba = find_fpsba(image, size); + fmsba_t *fmsba = find_fmsba(image, size); +-- +2.25.1 + |