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efi_loader: add SMBIOS table measurement

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TCG PC Client Platform Firmware Profile Specification
requires to measure the SMBIOS table that contains static
configuration information (e.g. Platform Manufacturer
Enterprise Number assigned by IANA, platform model number,
Vendor and Device IDs for each SMBIOS table).

The device- and environment-dependent information such as
serial number is cleared to zero or space character for
the measurement.

Existing smbios_string() function returns pointer to the string
with const qualifier, but exisintg use case is updating version
string and const qualifier must be removed.
This commit removes const qualifier from smbios_string()
return value and reuses to clear the strings for the measurement.

This commit also fixes the following compiler warning:

lib/smbios-parser.c:59:39: warning: cast to pointer from integer of
different size [-Wint-to-pointer-cast]
  const struct smbios_header *header = (struct smbios_header *)entry->struct_table_address;

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
This commit is contained in:
Masahisa Kojima
2021-10-26 17:27:24 +09:00
committed by Heinrich Schuchardt
parent a45dac1785
commit 3d49ee8510
8 changed files with 261 additions and 14 deletions
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2
lib/efi_loader/efi_boottime.c
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@@ -86,6 +86,8 @@ const efi_guid_t efi_guid_event_group_reset_system =
/* GUIDs of the Load File and Load File2 protocols */
const efi_guid_t efi_guid_load_file_protocol = EFI_LOAD_FILE_PROTOCOL_GUID;
const efi_guid_t efi_guid_load_file2_protocol = EFI_LOAD_FILE2_PROTOCOL_GUID;
/* GUID of the SMBIOS table */
const efi_guid_t smbios_guid = SMBIOS_TABLE_GUID;
static efi_status_t EFIAPI efi_disconnect_controller(
efi_handle_t controller_handle,