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update for vdiskchain

This commit is contained in:
longpanda 2021-01-26 11:07:31 +08:00
parent bae671bd68
commit 620bcad324
1 changed files with 57 additions and 1 deletions
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56
EDK2/edk2_mod/edk2-edk2-stable201911/MdeModulePkg/Application/VDiskChain/VDiskChain.c
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@ -72,6 +72,9 @@ CONST CHAR16 *gEfiBootFileName[] =
UINT8 *g_disk_buf_addr = NULL;
UINT64 g_disk_buf_size = 0;
STATIC EFI_GET_VARIABLE g_org_get_variable = NULL;
STATIC EFI_EXIT_BOOT_SERVICES g_org_exit_boot_service = NULL;
VOID EFIAPI VDiskDebug(IN CONST CHAR8 *Format, ...)
{
VA_LIST Marker;
@ -217,6 +220,54 @@ STATIC EFI_STATUS vdisk_patch_vdisk_path(CHAR16 *pos)
return 0;
}
EFI_STATUS EFIAPI vdisk_get_variable_wrapper
(
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
OUT UINT32 *Attributes, OPTIONAL
IN OUT UINTN *DataSize,
OUT VOID *Data OPTIONAL
)
{
EFI_STATUS Status = EFI_SUCCESS;
Status = g_org_get_variable(VariableName, VendorGuid, Attributes, DataSize, Data);
if (StrCmp(VariableName, L"SecureBoot") == 0)
{
if ((*DataSize == 1) && Data)
{
*(UINT8 *)Data = 0;
}
}
return Status;
}
EFI_STATUS EFIAPI vdisk_exit_boot_service_wrapper
(
IN EFI_HANDLE ImageHandle,
IN UINTN MapKey
)
{
return g_org_exit_boot_service(ImageHandle, MapKey);
}
STATIC EFI_STATUS EFIAPI vdisk_disable_secure_boot(IN EFI_HANDLE ImageHandle)
{
/* step1: wrapper security protocol. */
/* Do we still need it since we have been loaded ? */
/* step2: fake SecureBoot variable */
g_org_exit_boot_service = gBS->ExitBootServices;
gBS->ExitBootServices = vdisk_exit_boot_service_wrapper;
g_org_get_variable = gRT->GetVariable;
gRT->GetVariable = vdisk_get_variable_wrapper;
return EFI_SUCCESS;
}
STATIC EFI_STATUS EFIAPI vdisk_parse_cmdline(IN EFI_HANDLE ImageHandle)
{
CHAR16 *Pos = NULL;
@ -254,6 +305,11 @@ STATIC EFI_STATUS EFIAPI vdisk_parse_cmdline(IN EFI_HANDLE ImageHandle)
vdisk_patch_vdisk_path(Pos + 6);
if (StrStr(pCmdLine, L"secureboot=off"))
{
vdisk_disable_secure_boot(ImageHandle);
}
FreePool(pCmdLine);
return EFI_SUCCESS;
}