205 lines
7.9 KiB
Diff
205 lines
7.9 KiB
Diff
From 1a4f454e05b613cb080cdd063dd3efb1fdbb748b Mon Sep 17 00:00:00 2001
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From: Leah Rowe <leah@libreboot.org>
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Date: Sun, 19 Feb 2023 18:21:43 +0000
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Subject: [PATCH 20/20] util/ifdtool: add --nuke flag (all 0xFF on region)
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When this option is used, the region's contents are overwritten
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with all ones (0xFF).
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Example:
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./ifdtool --nuke gbe coreboot.rom
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./ifdtool --nuke bios coreboot.com
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./ifdtool --nuke me coreboot.com
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Rebased since the last revision update in lbmk.
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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---
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util/ifdtool/ifdtool.c | 113 ++++++++++++++++++++++++++++++-----------
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1 file changed, 82 insertions(+), 31 deletions(-)
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diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c
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index 516570e0a3..1638e1710e 100644
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--- a/util/ifdtool/ifdtool.c
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+++ b/util/ifdtool/ifdtool.c
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@@ -2143,6 +2143,7 @@ static void print_usage(const char *name)
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" tgl - Tiger Lake\n"
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" wbg - Wellsburg\n"
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" -S | --setpchstrap Write a PCH strap\n"
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+ " -N | --nuke <region> Overwrite the specified region with 0xFF (all ones)\n"
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" -V | --newvalue The new value to write into PCH strap specified by -S\n"
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" -v | --version: print the version\n"
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" -h | --help: print this help\n\n"
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@@ -2151,6 +2152,60 @@ static void print_usage(const char *name)
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"\n");
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}
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+static int
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+get_region_type_string(const char *region_type_string)
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+{
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+ if (!strcasecmp("Descriptor", region_type_string))
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+ return 0;
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+ else if (!strcasecmp("BIOS", region_type_string))
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+ return 1;
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+ else if (!strcasecmp("ME", region_type_string))
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+ return 2;
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+ else if (!strcasecmp("GbE", region_type_string))
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+ return 3;
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+ else if (!strcasecmp("Platform Data", region_type_string))
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+ return 4;
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+ else if (!strcasecmp("Device Exp1", region_type_string))
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+ return 5;
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+ else if (!strcasecmp("Secondary BIOS", region_type_string))
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+ return 6;
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+ else if (!strcasecmp("Reserved", region_type_string))
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+ return 7;
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+ else if (!strcasecmp("EC", region_type_string))
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+ return 8;
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+ else if (!strcasecmp("Device Exp2", region_type_string))
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+ return 9;
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+ else if (!strcasecmp("IE", region_type_string))
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+ return 10;
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+ else if (!strcasecmp("10GbE_0", region_type_string))
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+ return 11;
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+ else if (!strcasecmp("10GbE_1", region_type_string))
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+ return 12;
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+ else if (!strcasecmp("PTT", region_type_string))
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+ return 15;
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+ return -1;
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+}
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+
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+static void
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+nuke(const char *filename, char *image, int size, int region_type)
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+{
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+ int i;
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+ struct region region;
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+ const struct frba *frba = find_frba(image, size);
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+ if (!frba)
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+ exit(EXIT_FAILURE);
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+
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+ region = get_region(frba, region_type);
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+ if (region.size > 0) {
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+ for (i = region.base; i <= region.limit; i++) {
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+ if ((i + 1) > (size))
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+ break;
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+ image[i] = 0xFF;
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+ }
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+ write_image(filename, image, size);
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+ }
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+}
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+
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int main(int argc, char *argv[])
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{
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int opt, option_index = 0;
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@@ -2158,6 +2213,7 @@ int main(int argc, char *argv[])
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int mode_em100 = 0, mode_locked = 0, mode_unlocked = 0, mode_validate = 0;
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int mode_layout = 0, mode_newlayout = 0, mode_density = 0, mode_setstrap = 0;
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int mode_read = 0, mode_altmedisable = 0, altmedisable = 0, mode_fmap_template = 0;
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+ int mode_nuke = 0;
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int mode_gpr0_disable = 0, mode_gpr0_enable = 0;
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char *region_type_string = NULL, *region_fname = NULL;
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const char *layout_fname = NULL;
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@@ -2192,6 +2248,7 @@ int main(int argc, char *argv[])
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{"validate", 0, NULL, 't'},
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{"setpchstrap", 1, NULL, 'S'},
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{"newvalue", 1, NULL, 'V'},
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+ {"nuke", 1, NULL, 'N'},
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{0, 0, 0, 0}
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};
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@@ -2241,35 +2298,8 @@ int main(int argc, char *argv[])
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region_fname++;
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// Descriptor, BIOS, ME, GbE, Platform
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// valid type?
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- if (!strcasecmp("Descriptor", region_type_string))
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- region_type = 0;
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- else if (!strcasecmp("BIOS", region_type_string))
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- region_type = 1;
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- else if (!strcasecmp("ME", region_type_string))
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- region_type = 2;
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- else if (!strcasecmp("GbE", region_type_string))
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- region_type = 3;
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- else if (!strcasecmp("Platform Data", region_type_string))
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- region_type = 4;
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- else if (!strcasecmp("Device Exp1", region_type_string))
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- region_type = 5;
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- else if (!strcasecmp("Secondary BIOS", region_type_string))
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- region_type = 6;
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- else if (!strcasecmp("Reserved", region_type_string))
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- region_type = 7;
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- else if (!strcasecmp("EC", region_type_string))
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- region_type = 8;
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- else if (!strcasecmp("Device Exp2", region_type_string))
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- region_type = 9;
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- else if (!strcasecmp("IE", region_type_string))
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- region_type = 10;
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- else if (!strcasecmp("10GbE_0", region_type_string))
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- region_type = 11;
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- else if (!strcasecmp("10GbE_1", region_type_string))
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- region_type = 12;
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- else if (!strcasecmp("PTT", region_type_string))
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- region_type = 15;
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- if (region_type == -1) {
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+ if ((region_type =
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+ get_region_type_string(region_type_string)) == -1) {
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fprintf(stderr, "No such region type: '%s'\n\n",
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region_type_string);
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fprintf(stderr, "run '%s -h' for usage\n", argv[0]);
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@@ -2441,6 +2471,22 @@ int main(int argc, char *argv[])
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case 't':
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mode_validate = 1;
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break;
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+ case 'N':
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+ region_type_string = strdup(optarg);
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+ if (!region_type_string) {
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+ fprintf(stderr, "No region specified\n");
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+ print_usage(argv[0]);
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+ exit(EXIT_FAILURE);
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+ }
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+ if ((region_type =
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+ get_region_type_string(region_type_string)) == -1) {
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+ fprintf(stderr, "No such region type: '%s'\n\n",
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+ region_type_string);
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+ print_usage(argv[0]);
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+ exit(EXIT_FAILURE);
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+ }
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+ mode_nuke = 1;
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+ break;
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case 'v':
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print_version();
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exit(EXIT_SUCCESS);
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@@ -2457,7 +2503,7 @@ int main(int argc, char *argv[])
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if ((mode_dump + mode_layout + mode_fmap_template + mode_extract + mode_inject +
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mode_setstrap + mode_newlayout + (mode_spifreq | mode_em100 |
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mode_unlocked | mode_locked) + mode_altmedisable + mode_validate +
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- (mode_gpr0_disable | mode_gpr0_enable)) > 1) {
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+ (mode_gpr0_disable | mode_gpr0_enable) + mode_nuke) > 1) {
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fprintf(stderr, "You may not specify more than one mode.\n\n");
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fprintf(stderr, "run '%s -h' for usage\n", argv[0]);
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exit(EXIT_FAILURE);
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@@ -2466,7 +2512,8 @@ int main(int argc, char *argv[])
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if ((mode_dump + mode_layout + mode_fmap_template + mode_extract + mode_inject +
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mode_setstrap + mode_newlayout + mode_spifreq + mode_em100 +
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mode_locked + mode_unlocked + mode_density + mode_altmedisable +
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- mode_validate + (mode_gpr0_disable | mode_gpr0_enable)) == 0) {
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+ mode_validate + (mode_gpr0_disable | mode_gpr0_enable) +
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+ mode_nuke) == 0) {
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fprintf(stderr, "You need to specify a mode.\n\n");
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fprintf(stderr, "run '%s -h' for usage\n", argv[0]);
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exit(EXIT_FAILURE);
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@@ -2576,6 +2623,10 @@ int main(int argc, char *argv[])
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write_image(new_filename, image, size);
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}
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+ if (mode_nuke) {
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+ nuke(new_filename, image, size, region_type);
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+ }
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+
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if (mode_altmedisable) {
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struct fpsba *fpsba = find_fpsba(image, size);
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struct fmsba *fmsba = find_fmsba(image, size);
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--
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2.39.2
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