EFI_STATUS
efi_main (EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
{
EFI_STATUS status;
CHAR16 name[256], *val, fmt[20];
EFI_GUID vendor;
UINTN size;
InitializeLib(image, systab);
name[0] = 0;
vendor = NullGuid;
Print(L"GUID Variable Name Value\n");
Print(L"=================================== ==================== ========\n");
StrCpy(fmt, L"%.-35g %.-20s %s\n");
while (1) {
size = sizeof(name);
status = uefi_call_wrapper(RT->GetNextVariableName, 3, &size, name, &vendor);
if (status != EFI_SUCCESS)
break;
val = LibGetVariable(name, &vendor);
Print(fmt, &vendor, name, val);
FreePool(val);
}
return EFI_SUCCESS;
}
EFI_STATUS
LibDeleteVariable (
IN CHAR16 *VarName,
IN EFI_GUID *VarGuid
)
{
VOID *VarBuf;
EFI_STATUS Status;
VarBuf = LibGetVariable(VarName,VarGuid);
Status = EFI_NOT_FOUND;
if (VarBuf) {
//
// Delete variable from Storage
//
Status = uefi_call_wrapper(
RT->SetVariable,
5,
VarName, VarGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
0, NULL
);
ASSERT (!EFI_ERROR(Status));
FreePool(VarBuf);
}
return (Status);
}
EFI_STATUS
add_boot_option(EFI_DEVICE_PATH *hddp, EFI_DEVICE_PATH *fulldp,
CHAR16 *filename, CHAR16 *label, CHAR16 *arguments)
{
static int i = 0;
CHAR16 varname[] = L"Boot0000";
CHAR16 hexmap[] = L"0123456789ABCDEF";
EFI_GUID global = EFI_GLOBAL_VARIABLE;
EFI_STATUS rc;
for(; i <= 0xffff; i++) {
varname[4] = hexmap[(i & 0xf000) >> 12];
varname[5] = hexmap[(i & 0x0f00) >> 8];
varname[6] = hexmap[(i & 0x00f0) >> 4];
varname[7] = hexmap[(i & 0x000f) >> 0];
void *var = LibGetVariable(varname, &global);
if (!var) {
int size = sizeof(UINT32) + sizeof (UINT16) +
StrLen(label)*2 + 2 + DevicePathSize(hddp) +
StrLen(arguments) * 2;
CHAR8 *data = AllocateZeroPool(size + 2);
CHAR8 *cursor = data;
*(UINT32 *)cursor = LOAD_OPTION_ACTIVE;
cursor += sizeof (UINT32);
*(UINT16 *)cursor = DevicePathSize(hddp);
cursor += sizeof (UINT16);
StrCpy((CHAR16 *)cursor, label);
cursor += StrLen(label)*2 + 2;
CopyMem(cursor, hddp, DevicePathSize(hddp));
cursor += DevicePathSize(hddp);
StrCpy((CHAR16 *)cursor, arguments);
Print(L"Creating boot entry \"%s\" with label \"%s\" "
L"for file \"%s\"\n",
varname, label, filename);
if (!first_new_option) {
first_new_option = DuplicateDevicePath(fulldp);
first_new_option_args = arguments;
first_new_option_size = StrLen(arguments) * sizeof (CHAR16);
}
rc = uefi_call_wrapper(RT->SetVariable, 5, varname,
&global, EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
size, data);
FreePool(data);
if (EFI_ERROR(rc)) {
Print(L"Could not create variable: %d\n", rc);
return rc;
}
CHAR16 *newbootorder = AllocateZeroPool(sizeof (CHAR16)
* (nbootorder + 1));
if (!newbootorder)
return EFI_OUT_OF_RESOURCES;
int j = 0;
newbootorder[0] = i & 0xffff;
if (nbootorder) {
for (j = 0; j < nbootorder; j++)
newbootorder[j+1] = bootorder[j];
FreePool(bootorder);
}
bootorder = newbootorder;
nbootorder += 1;
#ifdef DEBUG_FALLBACK
Print(L"nbootorder: %d\nBootOrder: ", nbootorder);
for (j = 0 ; j < nbootorder ; j++)
Print(L"%04x ", bootorder[j]);
Print(L"\n");
#endif
return EFI_SUCCESS;
}
}
return EFI_OUT_OF_RESOURCES;
}
