blob: 8fda87e990996e41d5d9b2bd9606ef3a4fe62bb8 [file] [log] [blame]
Ed Coyne7464ac92017-06-08 12:26:48 -07001/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "BootAction.h"
18
19#define LOG_TAG "BootAction"
20
21#include <android-base/strings.h>
22#include <cpu-features.h>
23#include <dlfcn.h>
24#include <pio/peripheral_manager_client.h>
25#include <utils/Log.h>
26
27using android::base::Split;
28using android::base::Join;
29using android::base::StartsWith;
30using android::base::EndsWith;
31
32namespace android {
33
34BootAction::~BootAction() {
35 if (mLibHandle != nullptr) {
36 dlclose(mLibHandle);
37 }
38}
39
40bool BootAction::init(const std::string& libraryPath, const std::string& config) {
41 APeripheralManagerClient* client = nullptr;
42 ALOGD("Connecting to peripheralmanager");
43 // Wait for peripheral manager to come up.
44 while (client == nullptr) {
45 client = APeripheralManagerClient_new();
46 if (client == nullptr) {
47 ALOGV("peripheralmanager is not up, sleeping before we check again.");
48 usleep(250000);
49 }
50 }
51 ALOGD("Peripheralmanager is up.");
52 APeripheralManagerClient_delete(client);
53
54 std::string path_to_lib = libraryPath;
55 if (!parseConfig(config, &path_to_lib)) {
56 return false;
57 }
58
59 ALOGI("Loading boot action %s", path_to_lib.c_str());
60 mLibHandle = dlopen(path_to_lib.c_str(), RTLD_NOW);
61 if (mLibHandle == nullptr) {
62 ALOGE("Unable to load library at %s :: %s",
63 path_to_lib.c_str(), dlerror());
64 return false;
65 }
66
67 void* loaded = nullptr;
68 if (!loadSymbol("boot_action_init", &loaded) || loaded == nullptr) {
69 return false;
70 }
71 mLibInit = reinterpret_cast<libInit>(loaded);
72
73 loaded = nullptr;
74 if (!loadSymbol("boot_action_shutdown", &loaded) || loaded == nullptr) {
75 return false;
76 }
77 mLibShutdown = reinterpret_cast<libShutdown>(loaded);
78
79 // StartPart is considered optional, if it isn't exported by the library
80 // we will still call init and shutdown.
81 loaded = nullptr;
82 if (!loadSymbol("boot_action_start_part", &loaded) || loaded == nullptr) {
83 ALOGI("No boot_action_start_part found, action will not be told when "
84 "Animation parts change.");
85 } else {
86 mLibStartPart = reinterpret_cast<libStartPart>(loaded);
87 }
88
89 ALOGD("Entering boot_action_init");
90 bool result = mLibInit();
91 ALOGD("Returned from boot_action_init");
92 return result;
93}
94
95void BootAction::startPart(int partNumber, int playNumber) {
96 if (mLibStartPart == nullptr) return;
97
98 ALOGD("Entering boot_action_start_part");
99 mLibStartPart(partNumber, playNumber);
100 ALOGD("Returned from boot_action_start_part");
101}
102
103void BootAction::shutdown() {
104 ALOGD("Entering boot_action_shutdown");
105 mLibShutdown();
106 ALOGD("Returned from boot_action_shutdown");
107}
108
109bool BootAction::loadSymbol(const char* symbol, void** loaded) {
110 *loaded = dlsym(mLibHandle, symbol);
111 if (loaded == nullptr) {
112 ALOGE("Unable to load symbol : %s :: %s", symbol, dlerror());
113 return false;
114 }
115 return true;
116}
117
118
119bool BootAction::parseConfig(const std::string& config, std::string* path) {
120 auto lines = Split(config, "\n");
121
122 if (lines.size() < 1) {
123 ALOGE("Config format invalid, expected one line, found %d",
124 lines.size());
125 return false;
126 }
127
128 size_t lineNumber = 0;
129 auto& line1 = lines.at(lineNumber);
130 while (StartsWith(line1, "#")) {
131 if (lines.size() < ++lineNumber) {
132 ALOGE("Config file contains no non-comment lines.");
133 return false;
134 }
135 line1 = lines.at(lineNumber);
136 }
137
138 const std::string libraryNameToken("LIBRARY_NAME=");
139 if (!StartsWith(line1, libraryNameToken.c_str())) {
140 ALOGE("Invalid config format, expected second line to start with %s "
141 "Instead found: %s", libraryNameToken.c_str(), line1.c_str());
142 return false;
143 }
144
145 std::string libraryName = line1.substr(libraryNameToken.length());
146
147 *path += "/";
148 *path += architectureDirectory();
149 *path += "/";
150 *path += libraryName;
151
152 return true;
153}
154
155const char* BootAction::architectureDirectory() {
156 switch(android_getCpuFamily()) {
157 case ANDROID_CPU_FAMILY_ARM:
158 return "arm";
159 case ANDROID_CPU_FAMILY_X86:
160 return "x86";
161 case ANDROID_CPU_FAMILY_MIPS:
162 return "mips";
163 case ANDROID_CPU_FAMILY_ARM64:
164 return "arm64";
165 case ANDROID_CPU_FAMILY_X86_64:
166 return "x86_64";
167 case ANDROID_CPU_FAMILY_MIPS64:
168 return "mips64";
169 default:
170 ALOGE("Unsupported cpu family: %d", android_getCpuFamily());
171 return "";
172 }
173}
174
175} // namespace android