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/*
* Copyright (C) 2023 The Android Open Source Project
*
* 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
*
* http://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.
*/
#include "host/commands/assemble_cvd/disk/disk.h"
#include <fruit/fruit.h>
#include "common/libs/utils/files.h"
#include "host/commands/assemble_cvd/boot_image_utils.h"
#include "host/libs/vm_manager/gem5_manager.h"
namespace cuttlefish {
Result<void> Gem5ImageUnpacker(const CuttlefishConfig& config,
KernelRamdiskRepacker& /* dependency */) {
if (config.vm_manager() != vm_manager::Gem5Manager::name()) {
return {};
}
// TODO: b/281130788 - This should accept InstanceSpecific as an argument
const CuttlefishConfig::InstanceSpecific& instance_ =
config.ForDefaultInstance();
/* Unpack the original or repacked boot and vendor boot ramdisks, so that
* we have access to the baked bootconfig and raw compressed ramdisks.
* This allows us to emulate what a bootloader would normally do, which
* Gem5 can't support itself. This code also copies the kernel again
* (because Gem5 only supports raw vmlinux) and handles the bootloader
* binaries specially. This code is just part of the solution; it only
* does the parts which are instance agnostic.
*/
CF_EXPECT(FileHasContent(instance_.boot_image()), instance_.boot_image());
const std::string unpack_dir = config.assembly_dir();
// The init_boot partition is be optional for testing boot.img
// with the ramdisk inside.
if (!FileHasContent(instance_.init_boot_image())) {
LOG(WARNING) << "File not found: " << instance_.init_boot_image();
} else {
CF_EXPECT(UnpackBootImage(instance_.init_boot_image(), unpack_dir),
"Failed to extract the init boot image");
}
CF_EXPECT(FileHasContent(instance_.vendor_boot_image()),
instance_.vendor_boot_image());
CF_EXPECT(UnpackVendorBootImageIfNotUnpacked(instance_.vendor_boot_image(),
unpack_dir),
"Failed to extract the vendor boot image");
// Assume the user specified a kernel manually which is a vmlinux
CF_EXPECT(cuttlefish::Copy(instance_.kernel_path(), unpack_dir + "/kernel"));
// Gem5 needs the bootloader binary to be a specific directory structure
// to find it. Create a 'binaries' directory and copy it into there
const std::string binaries_dir = unpack_dir + "/binaries";
CF_EXPECT(
mkdir(binaries_dir.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) == 0 ||
errno == EEXIST,
"\"" << binaries_dir << "\": " << strerror(errno));
CF_EXPECT(cuttlefish::Copy(
instance_.bootloader(),
binaries_dir + "/" + cpp_basename(instance_.bootloader())));
// Gem5 also needs the ARM version of the bootloader, even though it
// doesn't use it. It'll even open it to check it's a valid ELF file.
// Work around this by copying such a named file from the same directory
CF_EXPECT(cuttlefish::Copy(cpp_dirname(instance_.bootloader()) + "/boot.arm",
binaries_dir + "/boot.arm"));
return {};
}
} // namespace cuttlefish
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