This is a custom linker used by the firmware build process (see the .cargo/config).
It's a simple wrapper around flip-link that does normal linking, followed by special linking to produce a firmware update archive that can be used to perform a FOTA update using the air-gradient-cli.
- Rust support for PIE isn't usable yet for the
thumbv7em-none-eabihftarget - Building the firmware runs a script at link-time to produce two ELF binaries: one for each linked slot location in FLASH (0x0801_0000 and 0x0804_0000)
- The two binaries will be archived into a CPIO file by agp-linker
- Host tooling (CLI) will communicate with the application to determine which firmware slot is available for writing
- Host tooling (CLI) will extract the selected ELF from the archive and convert it to binary (in-memory) before uploading in to the target
