Dynamic App Loader Helper #387

viswajith-g · 2024-04-01T06:28:50Z

This PR introduces the helper app to validate the kernel's dynamic process loading functionality (tock/tock#3941). The helper app triggers the dynamic process loading with a button press.

This application is located in /examples/tests/app_loader and was tested on the nRF52840DK. A previous version of the dynamic process loader was tested with the same application on an Imix board as well.

this app sends the tab file of an app that needs to be flashed to the capsule. once the app binary is written to flash, the userland app requests kernel to load the app.

examples/ota_app_wip/main.c

libtock/internal/app_loader.h

examples/ota_app_wip/main.c

libtock/internal/app_loader.h

libtock/internal/app_loader.c

alistair23 · 2024-04-02T10:51:47Z

examples/tests/app_loader/main.c

+uint32_t app_size = 0;        // variable to store app size
+
+// Tock Application Binary to be flashed.
+const uint8_t app_binary[] = {0x2, 0x0, 0x34, 0x0, 0x0, 0x8, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0xD7, 0x75, 0x50, 0x6E,


This application can build for any architecture. How does this data then work?

examples/tests/app_loader/main.c

alistair23 · 2024-04-02T23:46:25Z

examples/tests/app_loader/main.c

+  }
+
+  for (uint32_t offset = 0; offset < write_count; offset++) {
+    memcpy(write_buffer, &app_binary[FLASH_BUFFER_SIZE * offset], FLASH_BUFFER_SIZE);     // copy binary to write buffer


What if app_binary isn't a multiple of FLASH_BUFFER_SIZE?

examples/tests/app_loader/main.c

libtock/internal/app_loader.c

… in internal/binaries.c. cleaned up and formatted removed old code removed userspace code from a previous implementation that was giving rise to confusion. added comments to app_loader.h added binaries headers and updated code added binaries in external files to make the app file more readable. Added a new subscribe and callback to support the async setup update readme

viswajith-g added 3 commits November 8, 2023 13:35

validated ota app userland app support for current kernel

666e42b

added apploader test userland application

b50e10e

this app sends the tab file of an app that needs to be flashed to the capsule. once the app binary is written to flash, the userland app requests kernel to load the app.

Merge branch 'tock:master' into master

84edbac

alistair23 suggested changes Apr 2, 2024

View reviewed changes