src/starnix/kernel/syscall_loop/BUILD.bazel

# Copyright 2026 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

load("//build/bazel/rules/cc:fx_cc_library.bzl", "fx_cc_library")
load(
    "//build/bazel/rules/components:fx_component.bzl",
    "fx_component_manifest",
    "fx_test_component",
)
load("//build/bazel/rules/packages:fx_package.bzl", "fx_package")
load(
    "//build/bazel/rules/packages:fx_packaged_binary.bzl",
    "fx_packaged_binary",
)
load("//build/bazel/rules/rust:rustc_library.bzl", "rustc_library")
load("//build/bazel/rules/rust:rustc_test.bzl", "rustc_test")
load("//build/bazel/rules/testing:fx_test.bzl", "fx_test")

package(default_applicable_licenses = ["//:license"])

fx_cc_library(
    name = "restricted_trampoline",
    srcs = select({
        "@platforms//cpu:arm64": ["src/trampoline_arm64.S"],
        "@platforms//cpu:riscv64": ["src/trampoline_riscv64.S"],
        "@platforms//cpu:x86_64": ["src/trampoline_x64.S"],
    }),
    implementation_deps = ["//src/starnix/lib/asm_utils"],
)

# Kept separate from `restricted_trampoline` so that targets which only need the breakpoint (such
# as the starnix_core unit tests) don't link the trampolines, which call into
# `restricted_exit_callback_c` in this crate.
fx_cc_library(
    name = "module_changes_breakpoint",
    srcs = select({
        "@platforms//cpu:arm64": ["src/breakpoint_arm64.S"],
        "@platforms//cpu:riscv64": ["src/breakpoint_riscv64.S"],
        "@platforms//cpu:x86_64": ["src/breakpoint_x64.S"],
    }),
    implementation_deps = ["//src/starnix/lib/asm_utils"],
    visibility = ["//src/starnix/kernel/core:__pkg__"],
)

rustc_library(
    name = "starnix_syscall_loop",
    srcs = [
        "src/lib.rs",
        "src/table.rs",
    ],
    edition = "2024",
    link_deps = [
        ":module_changes_breakpoint",
        ":restricted_trampoline",
    ],
    lint_config = "//src/starnix/build:kernel_library_config",
    proc_macro_deps = ["//third_party/rust_crates/vendor:paste"],
    visibility = ["//src/starnix/kernel/runner:__pkg__"],
    deps = [
        "//sdk/rust/zx",
        "//src/lib/debug/rust",
        "//src/lib/trace/rust:trace",
        "//src/starnix/kernel/core",
        "//src/starnix/lib/extended_pstate:lib",
        "//src/starnix/lib/starnix_logging",
        "//src/starnix/lib/starnix_registers",
        "//src/starnix/lib/starnix_syscalls",
        "//src/starnix/lib/starnix_uapi",
        "//src/starnix/modules/inotify",
        "//src/starnix/modules/iouring",
        "//src/starnix/modules/syscalls",
        "//src/starnix/modules/userfaultfd",
        "//third_party/rust_crates/vendor:anyhow",
        "//third_party/rust_crates/vendor:zerocopy",
    ],
)

rustc_test(
    name = "starnix_syscall_loop_test",
    crate = ":starnix_syscall_loop",
    crate_name = "starnix_syscall_loop_lib_test",
    edition = "2024",
    lint_config = "//src/starnix/build:kernel_library_config",
    # TODO(https://fxbug.dev/42059075): Re-enable starnix in these environments.
    tags = [
        "exclude_toolchain_tags=asan",
        "exclude_toolchain_tags=hwasan",
    ],
)

fx_packaged_binary(
    name = "starnix_syscall_loop_test_packaged_bin",
    testonly = True,
    binary = ":starnix_syscall_loop_test",
    binary_name = "starnix_syscall_loop_lib_test",
)

fx_component_manifest(
    name = "starnix_syscall_loop_tests-manifest",
    testonly = True,
    component_name = "starnix_syscall_loop_tests",
    includes = [
        "//sdk/lib/inspect:client.shard",
        "//sdk/lib/syslog:client.shard",
        "//src/sys/test_runners/starnix:unit_test.shard.cml",
    ],
    manifest = "meta/starnix_syscall_loop_tests.cml",
)

fx_test_component(
    name = "starnix_syscall_loop_tests-component",
    compiled_manifest = ":starnix_syscall_loop_tests-manifest",
    test_type = "starnix",
    deps = [
        ":starnix_syscall_loop_test_packaged_bin",
        # In GN, //src/starnix/kernel/vdso is a resource() propagated through
        # //src/starnix/kernel/core's deps.
        "//src/starnix/kernel/vdso",
    ],
)

fx_package(
    name = "starnix_syscall_loop_tests-package",
    package_name = "starnix_syscall_loop_tests",
    test_components = [":starnix_syscall_loop_tests-component"],
)

fx_test(
    name = "starnix_syscall_loop_tests",
    package = ":starnix_syscall_loop_tests-package",
)