# Copyright 2025 The Fuchsia Authors
#
# Use of this source code is governed by a MIT-style
# license that can be found in the LICENSE file or at
# https://opensource.org/licenses/MIT

import("kernel_elf_binary.gni")

# Compile an ELF binary image to be loaded by physload.
#
# This defines a kernel_elf_binary() target that with settings appropriate for
# being a physload module with a `PhysLoadModuleMain` function (as declared in
# "physload.h").  See kernel_elf_binary() for more details.
#
# Parameters
#
#   * has_patches
#     - Optional: As for kernel_elf_image(), but with the opposite default.
#     - Type: bool
#     - Default: false
#
# All other parameters are as for kernel_elf_binary().
#
template("physload_module") {
  kernel_elf_binary(target_name) {
    assert_no_deps = []
    deps = []
    has_patches = false
    forward_variables_from(invoker, "*", [ "target_type" ])

    target_type = "loadable_module"
    deps += [ "//zircon/kernel/phys:physload.module" ]
    assert_no_deps += [ "//zircon/kernel/phys:uart-console" ]
  }
}

set_defaults("physload_module") {
  # This isn't default_shared_library_configs even though loadable_module()
  # defaults to that.  The physload modules don't use any _symbolic_ dynamic
  # linking, so they can use -fPIE rather than -fPIC in code generation even
  # though they are linked as -shared.
  configs = default_executable_configs
}