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llext: add a multi-file test case

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Add a case, testing building an llext from multiple files, calling
functions and accessing data across files.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
This commit is contained in:
Guennadi Liakhovetski 2024-05-06 17:40:40 +02:00 • committed by Carles Cufí
commit 8704a23cd7
4 changed files with 62 additions and 0 deletions
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10
tests/subsys/llext/simple/CMakeLists.txt
View file

@ -35,6 +35,16 @@ foreach(ext_name ${ext_names})
generate_inc_file_for_target(app ${ext_bin} ${ext_inc})
endforeach()
if(NOT CONFIG_LLEXT_TYPE_ELF_OBJECT)
add_llext_target(multi_file_ext
OUTPUT ${ZEPHYR_BINARY_DIR}/multi_file.llext
SOURCES ${PROJECT_SOURCE_DIR}/src/multi_file_ext1.c ${PROJECT_SOURCE_DIR}/src/multi_file_ext2.c
)
generate_inc_file_for_target(app ${ZEPHYR_BINARY_DIR}/multi_file.llext
${ZEPHYR_BINARY_DIR}/include/generated/multi_file.inc
)
endif()
# Add a dummy custom processing command to test add_llext_command
get_target_property(proc_in_file hello_world_ext lib_output)
get_target_property(proc_out_file hello_world_ext pkg_input)

30
tests/subsys/llext/simple/src/multi_file_ext1.c Normal file
View file

@ -0,0 +1,30 @@
/*
* Copyright (c) 2024 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* This code demonstrates multi-file object and function linking support.
*/
#include <stdint.h>
#include <zephyr/llext/symbol.h>
#include <zephyr/kernel.h>
/* Test non-static global object relocation */
int number = 0x42;
extern int ext_number;
int ext_sum_fn(int arg);
void test_entry(void)
{
printk("initial: local %d plus external %d equals %d\n",
number, ext_number, ext_sum_fn(ext_number));
number ^= ext_number;
ext_number ^= number;
number ^= ext_number;
printk("updated: local %d plus external %d equals %d\n",
number, ext_number, ext_sum_fn(ext_number));
}
LL_EXTENSION_SYMBOL(test_entry);

15
tests/subsys/llext/simple/src/multi_file_ext2.c Normal file
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@ -0,0 +1,15 @@
/*
* Copyright (c) 2024 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
/* File 2 of the multi-file linking test */
extern int number;
int ext_number = 0x18;
int ext_sum_fn(int arg)
{
return arg + number;
}

7
tests/subsys/llext/simple/src/test_llext_simple.c
View file

@ -230,6 +230,13 @@ static LLEXT_CONST uint8_t threads_kernel_objects_ext[] __aligned(4) = {
LLEXT_LOAD_UNLOAD(threads_kernel_objects, true, threads_objects_perm_setup)
#endif
#ifndef CONFIG_LLEXT_TYPE_ELF_OBJECT
static LLEXT_CONST uint8_t multi_file_ext[] __aligned(4) = {
#include "multi_file.inc"
};
LLEXT_LOAD_UNLOAD(multi_file, true, NULL)
#endif
/*
* Ensure that EXPORT_SYMBOL does indeed provide a symbol and a valid address