Sync/gnu-efi/apps/drv0_use.c
Curle d588e232c4 Major overhaul of this branch.
This branch has been dedicated to purely the UEFI bootloader.
As such, all other code has been removed.

This code can be compiled with Visual Studio, gcc or llvm.
2019-07-17 21:10:29 +01:00

80 lines
1.9 KiB
C

/*
* Copyright (C) 2013 David Decotigny <decot@googlers.com>
*
* See drv0.c for an example session.
*/
#include <efi.h>
#include <efilib.h>
#include "drv0.h"
static EFI_GUID GnuEfiAppsDrv0ProtocolGuid
= GNU_EFI_APPS_DRV0_PROTOCOL_GUID;
static
EFI_STATUS
PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle) {
EFI_STATUS Status;
GNU_EFI_APPS_DRV0_PROTOCOL *drv = NULL;
UINTN NumberOfHello = 0;
Status = uefi_call_wrapper(BS->OpenProtocol, 6,
DrvHandle,
&GnuEfiAppsDrv0ProtocolGuid,
(void**)&drv,
DrvHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(Status)) {
Print(L"Cannot open proto: %d\n", Status);
return Status;
}
Status = uefi_call_wrapper(drv->SayHello, 2, L"Sample UEFI Driver");
if (EFI_ERROR(Status)) {
Print(L"Cannot call SayHello: %d\n", Status);
}
Status = uefi_call_wrapper(drv->GetNumberOfHello, 2, &NumberOfHello);
if (EFI_ERROR(Status)) {
Print(L"Cannot call GetNumberOfHello: %d\n", Status);
} else {
Print(L"Hello was called %d time(s).\n", NumberOfHello);
}
return EFI_SUCCESS;
}
EFI_STATUS
efi_main (EFI_HANDLE Image, EFI_SYSTEM_TABLE *SysTab)
{
EFI_STATUS Status;
EFI_HANDLE *Handles = NULL;
UINTN i, NoHandles = 0;
InitializeLib(Image, SysTab);
Status = LibLocateHandle(ByProtocol, &GnuEfiAppsDrv0ProtocolGuid,
NULL, &NoHandles, &Handles);
if (EFI_ERROR(Status)) {
Print(L"Error looking up handles for proto: %d\n", Status);
return Status;
}
for (i = 0 ; i < NoHandles ; ++i)
{
Print(L"Playing with driver instance %d...\n", i);
Status = PlayWithGnuEfiAppsDrv0Protocol(Handles[i]);
if (EFI_ERROR(Status))
Print(L"Error playing with instance %d, skipping\n", i);
}
if (Handles)
FreePool(Handles);
return EFI_SUCCESS;
}