Hi Simon, On Fri, 27 Sept 2024 at 01:04, Simon Glass <[email protected]> wrote: > > Add a simple app to use for testing. This is intended to do whatever it > needs to for testing purposes. For now it just prints a message and > exits boot services. > > Signed-off-by: Simon Glass <[email protected]> > --- > > (no changes since v1) > > lib/efi_loader/Kconfig | 10 ++++++ > lib/efi_loader/Makefile | 1 + > lib/efi_loader/testapp.c | 68 ++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 79 insertions(+) > create mode 100644 lib/efi_loader/testapp.c > > diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig > index 6f6fa8d629d..41083e7c137 100644 > --- a/lib/efi_loader/Kconfig > +++ b/lib/efi_loader/Kconfig > @@ -564,6 +564,16 @@ config BOOTEFI_HELLO_COMPILE > No additional space will be required in the resulting U-Boot binary > when this option is enabled. > > +config BOOTEFI_TESTAPP_COMPILE > + bool "Compile an EFI test app for testing" > + default y > + help > + This compiles an app designed for testing. It is packed into an > image > + by the test.py testing frame in the setup_efi_image() function. > + > + No additional space will be required in the resulting U-Boot binary > + when this option is enabled. > + > endif > > source "lib/efi/Kconfig" > diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile > index 00d18966f9e..87131ab911d 100644 > --- a/lib/efi_loader/Makefile > +++ b/lib/efi_loader/Makefile > @@ -20,6 +20,7 @@ apps-$(CONFIG_EFI_LOAD_FILE2_INITRD) += initrddump > ifeq ($(CONFIG_GENERATE_ACPI_TABLE),) > apps-y += dtbdump > endif > +apps-$(CONFIG_BOOTEFI_TESTAPP_COMPILE) += testapp > > obj-$(CONFIG_CMD_BOOTEFI_HELLO) += helloworld_efi.o > obj-$(CONFIG_EFI_BOOTMGR) += efi_bootmgr.o > diff --git a/lib/efi_loader/testapp.c b/lib/efi_loader/testapp.c > new file mode 100644 > index 00000000000..feb444c92e9 > --- /dev/null > +++ b/lib/efi_loader/testapp.c > @@ -0,0 +1,68 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Hello world EFI application > + * > + * Copyright 2024 Google LLC > + * Written by Simon Glass <[email protected]> > + * > + * This test program is used to test the invocation of an EFI application. > + * It writes a few messages to the console and then exits boot services > + */ > + > +#include <efi_api.h> > + > +static const efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID; > + > +static struct efi_system_table *systable; > +static struct efi_boot_services *boottime; > +static struct efi_simple_text_output_protocol *con_out; > + > +/** > + * efi_main() - entry point of the EFI application. > + * > + * @handle: handle of the loaded image > + * @systab: system table > + * Return: status code > + */ > +efi_status_t EFIAPI efi_main(efi_handle_t handle, > + struct efi_system_table *systab) > +{ > + struct efi_loaded_image *loaded_image; > + efi_status_t ret; > + efi_uintn_t map_size; > + efi_uintn_t map_key; > + efi_uintn_t desc_size; > + u32 desc_version; > + > + systable = systab; > + boottime = systable->boottime; > + con_out = systable->con_out; > + > + /* Get the loaded image protocol */ > + ret = boottime->open_protocol(handle, &loaded_image_guid, > + (void **)&loaded_image, NULL, NULL, > + EFI_OPEN_PROTOCOL_GET_PROTOCOL); > + if (ret != EFI_SUCCESS) { > + con_out->output_string > + (con_out, u"Cannot open loaded image protocol\r\n"); > + goto out; > + } > + > + /* UEFI requires CR LF */ > + con_out->output_string(con_out, u"U-Boot test app for > EFI_LOADER\r\n"); > + > +out: > + map_size = 0; > + ret = boottime->get_memory_map(&map_size, NULL, &map_key, &desc_size, > + &desc_version); > + con_out->output_string(con_out, u"Exiting boot sevices\n"); > + > + /* exit boot services so that this part of U-Boot can be tested */ > + boottime->exit_boot_services(handle, map_key);
What Heinrich keeps repeating here, is that after you call EBS, boot services must not be called again. > + > + /* now exit for real */ > + ret = boottime->exit(handle, ret, 0, NULL); IOW this is wrong. It might happen to work because not much has run and the memory will still be there. But you certainly should not rely on that Thanks /Ilias > + > + /* We should never arrive here */ > + return ret; > +} > -- > 2.43.0 >
