04bd965143
Offline SMMSTORE variable modification tool. Can be used to pre-configure ROM image or debug EFI state stored in a dump. Change-Id: I6c1c06f1d0c39c13b5be76a3070f09b715aca6e0 Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/79080 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "storage.h"
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#include <assert.h>
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#include <stdio.h>
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#include "fv.h"
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#include "utils.h"
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bool storage_open(const char store_file[], struct storage_t *storage, bool rw)
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{
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storage->rw = rw;
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storage->file = map_file(store_file, rw);
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if (storage->file.start == NULL) {
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fprintf(stderr, "Failed to load smm-store-file \"%s\"\n",
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store_file);
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return false;
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}
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bool auth_vars;
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if (!fv_parse(storage->file, &storage->store_area, &auth_vars)) {
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if (!rw) {
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fprintf(stderr,
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"Failed to find variable store in \"%s\"\n",
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store_file);
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goto error;
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}
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if (!fv_init(storage->file)) {
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fprintf(stderr,
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"Failed to create variable store in \"%s\"\n",
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store_file);
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goto error;
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}
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if (!fv_parse(storage->file, &storage->store_area, &auth_vars)) {
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fprintf(stderr,
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"Failed to parse newly formatted store in \"%s\"\n",
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store_file);
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goto error;
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}
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fprintf(stderr,
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"Successfully created variable store in \"%s\"\n",
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store_file);
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}
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storage->vs = vs_load(storage->store_area, auth_vars);
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return true;
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error:
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unmap_file(storage->file);
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return false;
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}
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bool storage_write_back(struct storage_t *storage)
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{
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assert(storage->rw && "Only RW storage can be updated.");
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bool success = vs_store(&storage->vs, storage->store_area);
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if (!success)
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fprintf(stderr, "Failed to update variable store\n");
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storage_drop(storage);
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return success;
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}
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void storage_drop(struct storage_t *storage)
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{
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unmap_file(storage->file);
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vs_free(&storage->vs);
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}
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