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efi_loader: implement ProtocolsPerHandle

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Boot service ProtocolsPerHandle is implemented in
efi_protocols_per_handle.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
xypron.glpk@gmx.de 2017-07-13 23:24:32 +02:00 committed by Alexander Graf
parent b521d29eb1
commit c0ebfc8664
1 changed files with 44 additions and 1 deletions
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45
lib/efi_loader/efi_boottime.c
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@ -865,10 +865,53 @@ static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
efi_guid_t ***protocol_buffer,
unsigned long *protocol_buffer_count)
{
unsigned long buffer_size;
struct efi_object *efiobj;
unsigned long i, j;
struct list_head *lhandle;
efi_status_t r;
EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
protocol_buffer_count);
if (!handle || !protocol_buffer || !protocol_buffer_count)
return EFI_EXIT(EFI_INVALID_PARAMETER);
*protocol_buffer = NULL;
*protocol_buffer_count = 0;
return EFI_EXIT(EFI_OUT_OF_RESOURCES);
list_for_each(lhandle, &efi_obj_list) {
efiobj = list_entry(lhandle, struct efi_object, link);
if (efiobj->handle != handle)
continue;
/* Count protocols */
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
if (efiobj->protocols[i].guid)
++*protocol_buffer_count;
}
/* Copy guids */
if (*protocol_buffer_count) {
buffer_size = sizeof(efi_guid_t *) *
*protocol_buffer_count;
r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
buffer_size,
(void **)protocol_buffer);
if (r != EFI_SUCCESS)
return EFI_EXIT(r);
j = 0;
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
if (efiobj->protocols[i].guid) {
(*protocol_buffer)[j] = (void *)
efiobj->protocols[i].guid;
++j;
}
}
}
break;
}
return EFI_EXIT(EFI_SUCCESS);
}
static efi_status_t EFIAPI efi_locate_handle_buffer(