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# Copyright 2020 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
# gn-format disable
import("//build_overrides/pigweed.gni")
import("$dir_pw_build/facade.gni")
import("$dir_pw_docgen/docs.gni")
import("backend.gni")
config("default_config") {
include_dirs = [ "public" ]
}
group("pw_cpu_exception") {
public_deps = [
":entry",
":handler",
]
}
# This module has three facades, each of whose backends are set with a
# different GN variable.
#
# - entry: This is the library that handles early exception entry and prepares
# any CPU state that must be available to the exception handler via the
# pw_CpuState object. The backend for this facade will be architecture-
# specific.
# Set this facade's backend via `pw_cpu_exception_ENTRY_BACKEND`
#
# - handler: This facade is backed by an application-specific handler that
# determines what to do when an exception is encountered. This may be
# capturing a crash report before resetting the device, or in some cases
# handling the exception to allow execution to continue.
# Set this facade's backend via `pw_cpu_exception_HANDLER_BACKEND`
#
# - support: This facade provides architecture-independent functions that may be
# helpful for dumping CPU state in various forms. This allows an application
# to create an application-specific handler that is portable across multiple
# architectures.
# Set this facade's backend via `pw_cpu_exception_SUPPORT_BACKEND`
pw_facade("entry") {
backend = pw_cpu_exception_ENTRY_BACKEND
facade_name = "entry_facade"
public_configs = [ ":default_config" ]
public_deps = [ "$dir_pw_preprocessor" ]
deps = [ ":handler_facade" ]
public = [ "public/pw_cpu_exception/entry.h" ]
}
pw_facade("handler") {
backend = pw_cpu_exception_HANDLER_BACKEND
facade_name = "handler_facade"
public_configs = [ ":default_config" ]
public_deps = [
"$dir_pw_preprocessor",
"$dir_pw_span",
]
sources = [ "start_exception_handler.cc" ]
public = [ "public/pw_cpu_exception/handler.h" ]
}
# This library is technically optional. It is recommended to use `support` when
# doing basic dumps of CPU state. As an alternative, projects may choose to
# directly depend on the entry backend if they require direct access to
# pw_CpuExceptionState members.
pw_facade("support") {
backend = pw_cpu_exception_SUPPORT_BACKEND
facade_name = "support_facade"
public_configs = [ ":default_config" ]
public_deps = [ "$dir_pw_span" ]
public = [ "public/pw_cpu_exception/support.h" ]
}
pw_source_set("basic_handler") {
deps = [
":handler_facade",
dir_pw_log,
]
sources = [ "basic_handler.cc" ]
}
pw_doc_group("docs") {
sources = [ "docs.rst" ]
}
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