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efi_loader: implement UnloadImage()

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Implement the UnloadImage() boot service

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-05-01 18:25:45 +02:00
parent 46e99a9cf7
commit df116e81ea
2 changed files with 52 additions and 5 deletions
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2
include/efi_api.h
View File

@ -348,7 +348,7 @@ struct efi_loaded_image {
aligned_u64 image_size;
unsigned int image_code_type;
unsigned int image_data_type;
unsigned long unload;
efi_status_t (EFIAPI *unload)(efi_handle_t image_handle);
};
#define EFI_DEVICE_PATH_PROTOCOL_GUID \

55
lib/efi_loader/efi_boottime.c
View File

@ -2669,6 +2669,20 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
return EFI_CALL(systab.boottime->exit(image_handle, ret, 0, NULL));
}
/**
* efi_delete_image() - delete loaded image from memory)
*
* @image_obj: handle of the loaded image
* @loaded_image_protocol: loaded image protocol
*/
static void efi_delete_image(struct efi_loaded_image_obj *image_obj,
struct efi_loaded_image *loaded_image_protocol)
{
efi_free_pages((uintptr_t)loaded_image_protocol->image_base,
efi_size_in_pages(loaded_image_protocol->image_size));
efi_delete_handle(&image_obj->header);
}
/**
* efi_unload_image() - unload an EFI image
* @image_handle: handle of the image to be unloaded
@ -2682,14 +2696,47 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
*/
efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle)
{
efi_status_t ret = EFI_SUCCESS;
struct efi_object *efiobj;
struct efi_loaded_image *loaded_image_protocol;
EFI_ENTRY("%p", image_handle);
efiobj = efi_search_obj(image_handle);
if (efiobj)
list_del(&efiobj->link);
return EFI_EXIT(EFI_SUCCESS);
efiobj = efi_search_obj(image_handle);
if (!efiobj) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
/* Find the loaded image protocol */
ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
(void **)&loaded_image_protocol,
NULL, NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
if (ret != EFI_SUCCESS) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
switch (efiobj->type) {
case EFI_OBJECT_TYPE_STARTED_IMAGE:
/* Call the unload function */
if (!loaded_image_protocol->unload) {
ret = EFI_UNSUPPORTED;
goto out;
}
ret = EFI_CALL(loaded_image_protocol->unload(image_handle));
if (ret != EFI_SUCCESS)
goto out;
break;
case EFI_OBJECT_TYPE_LOADED_IMAGE:
break;
default:
ret = EFI_INVALID_PARAMETER;
goto out;
}
efi_delete_image((struct efi_loaded_image_obj *)efiobj,
loaded_image_protocol);
out:
return EFI_EXIT(ret);
}
/**