Support loading images via the EFI_LOAD_FILE_PROTOCOL and EFI_LOAD_FILE2_PROTOCOL.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- lib/efi_loader/efi_boottime.c | 49 ++++++++++++++++++++++++++++++++++- 1 file changed, 48 insertions(+), 1 deletion(-)
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 1983ca3f6b..9bd63b6e52 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -1942,6 +1942,10 @@ efi_status_t efi_load_image_from_path(bool boot_policy, efi_handle_t device; efi_status_t ret; struct efi_device_path *dp; + struct efi_load_file_protocol *load_file_protocol = NULL; + efi_uintn_t buffer_size; + uint64_t addr, pages; + const efi_guid_t *guid;
/* In case of failure nothing is returned */ *buffer = NULL; @@ -1952,7 +1956,50 @@ efi_status_t efi_load_image_from_path(bool boot_policy, &efi_simple_file_system_protocol_guid, &dp, &device)); if (ret == EFI_SUCCESS) return efi_load_image_from_file(file_path, buffer, size); - return EFI_NOT_FOUND; + + ret = EFI_CALL(efi_locate_device_path( + &efi_guid_load_file_protocol, &dp, &device)); + if (ret == EFI_SUCCESS) { + guid = &efi_guid_load_file_protocol; + } else if (!boot_policy) { + guid = &efi_guid_load_file2_protocol; + ret = EFI_CALL(efi_locate_device_path(guid, &dp, &device)); + } + if (ret != EFI_SUCCESS) + return EFI_NOT_FOUND; + ret = EFI_CALL(efi_handle_protocol(device, guid, + (void **)&load_file_protocol)); + if (ret != EFI_SUCCESS) + return EFI_NOT_FOUND; + buffer_size = 0; + ret = load_file_protocol->load_file(load_file_protocol, dp, + boot_policy, &buffer_size, + NULL); + if (ret != EFI_BUFFER_TOO_SMALL) + goto out; + pages = efi_size_in_pages(buffer_size); + ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, EFI_BOOT_SERVICES_DATA, + pages, &addr); + if (ret != EFI_SUCCESS) { + ret = EFI_OUT_OF_RESOURCES; + goto out; + } + ret = EFI_CALL(load_file_protocol->load_file( + load_file_protocol, dp, boot_policy, + &buffer_size, (void *)(uintptr_t)addr)); + if (ret != EFI_SUCCESS) + efi_free_pages(addr, pages); +out: + if (load_file_protocol) + EFI_CALL(efi_close_protocol(device, + &efi_guid_load_file2_protocol, + efi_root, NULL)); + if (ret == EFI_SUCCESS) { + *buffer = (void *)(uintptr_t)addr; + *size = buffer_size; + } + + return ret; }
/** -- 2.29.2