[U-Boot] [PATCH 1/4] efi_loader: mark started images
Takahiro Akashi
takahiro.akashi at linaro.org
Tue May 7 05:44:42 UTC 2019
On Tue, May 07, 2019 at 07:26:46AM +0200, Heinrich Schuchardt wrote:
> On 5/7/19 5:02 AM, Takahiro Akashi wrote:
> >On Sat, May 04, 2019 at 10:36:33AM +0200, Heinrich Schuchardt wrote:
> >>In UnloadImage() we need to know if an image is already started.
> >>
> >>Add a field to the handle structure identifying loaded and started images.
> >>
> >>Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> >>---
> >> include/efi_loader.h | 13 +++++++++++++
> >> lib/efi_loader/efi_boottime.c | 2 ++
> >> 2 files changed, 15 insertions(+)
> >>
> >>diff --git a/include/efi_loader.h b/include/efi_loader.h
> >>index 3fd9901d66..c2a449e5b6 100644
> >>--- a/include/efi_loader.h
> >>+++ b/include/efi_loader.h
> >>@@ -182,6 +182,18 @@ struct efi_handler {
> >> struct list_head open_infos;
> >> };
> >>
> >>+/**
> >>+ * enum efi_object_type - type of EFI object
> >>+ *
> >>+ * In UnloadImage we must be able to identify if the handle relates to a
> >>+ * started image.
> >>+ */
> >>+enum efi_object_type {
> >>+ EFI_OBJECT_TYPE_UNDEFINED = 0,
> >>+ EFI_OBJECT_TYPE_LOADED_IMAGE,
> >>+ EFI_OBJECT_TYPE_STARTED_IMAGE,
> >>+};
> >
> >It sounds *status*, not *type*.
> >In a separate patch, you added U_BOOT_FIRMWARE.
> >We should distinguish status and type for future enhancement and
> >to avoid any confusion.
>
> Having both information in the same field makes the evaluation easier.
>
> Currently I see not necessity for more handle types to be
> differentiated. Let's change it when the need arises.
I don't think we need U_BOOT_FIRMWARE if we use STARTED_IMAGE
for root node. Then we can rename efi_object_type to efi_image_status.
-Takahiro Akashi
> Best regards
>
> Heinrich
>
> >
> >Thanks,
> >-Takahiro Akashi
> >
> >
> >> /**
> >> * struct efi_object - dereferenced EFI handle
> >> *
> >>@@ -204,6 +216,7 @@ struct efi_object {
> >> struct list_head link;
> >> /* The list of protocols */
> >> struct list_head protocols;
> >>+ enum efi_object_type type;
> >> };
> >>
> >> /**
> >>diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> >>index 3ed08e7c37..dc444fccf6 100644
> >>--- a/lib/efi_loader/efi_boottime.c
> >>+++ b/lib/efi_loader/efi_boottime.c
> >>@@ -1554,6 +1554,7 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
> >> free(info);
> >> return EFI_OUT_OF_RESOURCES;
> >> }
> >>+ obj->header.type = EFI_OBJECT_TYPE_LOADED_IMAGE;
> >>
> >> /* Add internal object to object list */
> >> efi_add_handle(&obj->header);
> >>@@ -2678,6 +2679,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
> >> }
> >>
> >> current_image = image_handle;
> >>+ image_obj->header.type = EFI_OBJECT_TYPE_STARTED_IMAGE;
> >> EFI_PRINT("Jumping into 0x%p\n", image_obj->entry);
> >> ret = EFI_CALL(image_obj->entry(image_handle, &systab));
> >>
> >>--
> >>2.20.1
> >>
> >
>
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