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efi_loader: create stub for CreateEventEx

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Currently we set the function pointer for the CreateEventEx boot service
to NULL. When called this would lead to an immediate failure.

A function stub is provided which handles the case that the boot service
is called without an event group and returns EFI_UNSUPPORTED otherwise.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-02-04 23:05:13 +01:00 committed by Alexander Graf
parent ae86b6be12
commit 9f0930e5d9
2 changed files with 41 additions and 1 deletions
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9
include/efi_api.h
View File

@ -166,7 +166,14 @@ struct efi_boot_services {
void (EFIAPI *copy_mem)(void *destination, const void *source,
size_t length);
void (EFIAPI *set_mem)(void *buffer, size_t size, uint8_t value);
void *create_event_ex;
efi_status_t (EFIAPI *create_event_ex)(
uint32_t type, efi_uintn_t notify_tpl,
void (EFIAPI *notify_function) (
struct efi_event *event,
void *context),
void *notify_context,
efi_guid_t *event_group,
struct efi_event **event);
};
/* Types and defines for EFI ResetSystem */

33
lib/efi_loader/efi_boottime.c
View File

@ -525,6 +525,38 @@ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
return EFI_OUT_OF_RESOURCES;
}
/*
* Create an event in a group.
*
* This function implements the CreateEventEx service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
* TODO: Support event groups
*
* @type type of the event to create
* @notify_tpl task priority level of the event
* @notify_function notification function of the event
* @notify_context pointer passed to the notification function
* @event created event
* @event_group event group
* @return status code
*/
efi_status_t EFIAPI efi_create_event_ex(uint32_t type, efi_uintn_t notify_tpl,
void (EFIAPI *notify_function) (
struct efi_event *event,
void *context),
void *notify_context,
efi_guid_t *event_group,
struct efi_event **event)
{
EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function,
notify_context, event_group);
if (event_group)
return EFI_EXIT(EFI_UNSUPPORTED);
return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
notify_context, event));
}
/*
* Create an event.
*
@ -2851,6 +2883,7 @@ static const struct efi_boot_services efi_boot_services = {
.calculate_crc32 = efi_calculate_crc32,
.copy_mem = efi_copy_mem,
.set_mem = efi_set_mem,
.create_event_ex = efi_create_event_ex,
};