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Protect the kernel version space from redefinition.

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Review URL: http://codereview.chromium.org/2786005
This commit is contained in:
Luigi Semenzato
2010-06-10 11:01:04 -07:00
parent d183644564
commit 4f11c36ebc
5 changed files with 182 additions and 110 deletions
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8
vboot_firmware/include/rollback_index.h
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@@ -25,7 +25,13 @@ extern uint16_t g_kernel_version;
#define KERNEL_VERSIONS_NV_INDEX 0x1002
#define TPM_IS_INITIALIZED_NV_INDEX 0x1003
#define KERNEL_VERSIONS_BACKUP_NV_INDEX 0x1004
#define KERNEL_BACKUP_IS_VALID_NV_INDEX 0x1005
#define KERNEL_MUST_USE_BACKUP_NV_INDEX 0x1005
/* Unique ID to detect kernel space redefinition */
#define KERNEL_SPACE_UID "GRWL" /* unique ID with secret meaning */
#define KERNEL_SPACE_UID_SIZE (sizeof(KERNEL_SPACE_UID) - 1)
#define KERNEL_SPACE_INIT_DATA ((uint8_t*) "\0\0\0\0" KERNEL_SPACE_UID)
#define KERNEL_SPACE_SIZE (sizeof(uint32_t) + KERNEL_SPACE_UID_SIZE)
/* All functions return 0 if successful, non-zero if error */
uint32_t SetupTPM(void);