On 9/27/21 6:30 AM, AKASHI Takahiro wrote:
struct efi_driver_binding_protocol, i.e. bp, is not the first element in struct efi_driver_binding_extended_protocol. So the casting: struct efi_driver_binding_extended_protocol *bp = (struct efi_driver_binding_extended_protocol *)this; is simply wrong.
The definition in include/efi_driver.h is:
/* * This structure adds internal fields to the driver binding protocol. */ struct efi_driver_binding_extended_protocol { struct efi_driver_binding_protocol bp; const struct efi_driver_ops *ops; };
Why do you claim "bp is not the first element"?
The whole efi_driver code relies on the fact that the efi_driver_binding_extended_protocol can be interpreted as efi_driver_binding_protocol.
Best regards
Heinrich
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org
lib/efi_driver/efi_uclass.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/lib/efi_driver/efi_uclass.c b/lib/efi_driver/efi_uclass.c index 382c2b477f4d..9e784f9c237f 100644 --- a/lib/efi_driver/efi_uclass.c +++ b/lib/efi_driver/efi_uclass.c @@ -65,8 +65,8 @@ static efi_status_t EFIAPI efi_uc_supported( { efi_status_t r, ret; void *interface;
- struct efi_driver_binding_extended_protocol *bp =
(struct efi_driver_binding_extended_protocol *)this;
struct efi_driver_binding_extended_protocol *bp = container_of(this,
struct efi_driver_binding_extended_protocol, bp);EFI_ENTRY("%p, %p, %ls", this, controller_handle, efi_dp_str(remaining_device_path));
@@ -113,8 +113,8 @@ static efi_status_t EFIAPI efi_uc_start( { efi_status_t r, ret; void *interface = NULL;
- struct efi_driver_binding_extended_protocol *bp =
(struct efi_driver_binding_extended_protocol *)this;
struct efi_driver_binding_extended_protocol *bp = container_of(this,
struct efi_driver_binding_extended_protocol, bp);EFI_ENTRY("%p, %p, %ls", this, controller_handle, efi_dp_str(remaining_device_path));
@@ -201,8 +201,8 @@ static efi_status_t EFIAPI efi_uc_stop( efi_status_t ret; efi_uintn_t count; struct efi_open_protocol_info_entry *entry_buffer;
- struct efi_driver_binding_extended_protocol *bp =
(struct efi_driver_binding_extended_protocol *)this;
struct efi_driver_binding_extended_protocol *bp = container_of(this,
struct efi_driver_binding_extended_protocol, bp);EFI_ENTRY("%p, %p, %zu, %p", this, controller_handle, number_of_children, child_handle_buffer);
@@ -283,7 +283,7 @@ static efi_status_t efi_add_driver(struct driver *drv) } bp->bp.image_handle = bp->bp.driver_binding_handle; ret = efi_add_protocol(bp->bp.driver_binding_handle,
&efi_guid_driver_binding_protocol, bp);
&efi_guid_driver_binding_protocol, &bp->bp);