diff options
Diffstat (limited to 'firmware/lib/vboot_kernel.c')
| -rw-r--r-- | firmware/lib/vboot_kernel.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/firmware/lib/vboot_kernel.c b/firmware/lib/vboot_kernel.c index d1f261d7..d189e43e 100644 --- a/firmware/lib/vboot_kernel.c +++ b/firmware/lib/vboot_kernel.c @@ -72,23 +72,35 @@ int AllocAndReadGptData(VbExDiskHandle_t disk_handle, GptData* gptdata) { * Returns 0 if successful, 1 if error. */ int WriteAndFreeGptData(VbExDiskHandle_t disk_handle, GptData* gptdata) { + int legacy = 0; uint64_t entries_sectors = TOTAL_ENTRIES_SIZE / gptdata->sector_bytes; if (gptdata->primary_header) { + GptHeader* h = (GptHeader*)(gptdata->primary_header); + legacy = !Memcmp(h->signature, GPT_HEADER_SIGNATURE2, + GPT_HEADER_SIGNATURE_SIZE); if (gptdata->modified & GPT_MODIFIED_HEADER1) { - VBDEBUG(("Updating GPT header 1\n")); - if (0 != VbExDiskWrite(disk_handle, 1, 1, gptdata->primary_header)) - return 1; + if (legacy) { + VBDEBUG(("Not updating GPT header 1: legacy mode is enabled.\n")); + } else { + VBDEBUG(("Updating GPT header 1\n")); + if (0 != VbExDiskWrite(disk_handle, 1, 1, gptdata->primary_header)) + return 1; + } } VbExFree(gptdata->primary_header); } if (gptdata->primary_entries) { if (gptdata->modified & GPT_MODIFIED_ENTRIES1) { - VBDEBUG(("Updating GPT entries 1\n")); - if (0 != VbExDiskWrite(disk_handle, 2, entries_sectors, - gptdata->primary_entries)) - return 1; + if (legacy) { + VBDEBUG(("Not updating GPT entries 1: legacy mode is enabled.\n")); + } else { + VBDEBUG(("Updating GPT entries 1\n")); + if (0 != VbExDiskWrite(disk_handle, 2, entries_sectors, + gptdata->primary_entries)) + return 1; + } } VbExFree(gptdata->primary_entries); } |