ppsspp/ios/main.mm
2024-05-21 14:48:28 +02:00

592 lines
18 KiB
Plaintext

// main.mm boilerplate
//
// Overview
//
// main.mm: JIT enablement, starting the next step
// AppDelegate.mm: Runs NativeInit, launches the main ViewController
// ViewController.mm: The main application window
#import <UIKit/UIKit.h>
#import <dlfcn.h>
#import <mach/mach.h>
#import <mach-o/loader.h>
#import <mach-o/getsect.h>
#import <pthread.h>
#import <spawn.h>
#import <signal.h>
#import <string>
#import <stdio.h>
#import <stdlib.h>
#import <sys/syscall.h>
#import <sys/utsname.h>
#import <AudioToolbox/AudioToolbox.h>
#import "AppDelegate.h"
#import "PPSSPPUIApplication.h"
#import "ViewController.h"
#include "Common/MemoryUtil.h"
#include "Common/System/NativeApp.h"
#include "Common/System/System.h"
#include "Common/System/Request.h"
#include "Common/StringUtils.h"
#include "Common/Profiler/Profiler.h"
#include "Core/Config.h"
#include "Common/Log.h"
#include "UI/DarwinFileSystemServices.h"
// Compile out all the hackery in app store builds.
#if !PPSSPP_PLATFORM(IOS_APP_STORE)
struct cs_blob_index {
uint32_t type;
uint32_t offset;
};
struct cs_superblob {
uint32_t magic;
uint32_t length;
uint32_t count;
struct cs_blob_index index[];
};
struct cs_entitlements {
uint32_t magic;
uint32_t length;
char entitlements[];
};
static int (*csops)(pid_t pid, unsigned int ops, void * useraddr, size_t usersize);
static boolean_t (*exc_server)(mach_msg_header_t *, mach_msg_header_t *);
static int (*ptrace)(int request, pid_t pid, caddr_t addr, int data);
#define CS_OPS_STATUS 0 /* return status */
#define CS_KILL 0x00000200 /* kill process if it becomes invalid */
#define CS_DEBUGGED 0x10000000 /* process is currently or has previously been debugged and allowed to run with invalid pages */
#define PT_TRACE_ME 0 /* child declares it's being traced */
#define PT_SIGEXC 12 /* signals as exceptions for current_proc */
#define ptrace(a, b, c, d) syscall(SYS_ptrace, a, b, c, d)
static void *exception_handler(void *argument) {
mach_port_t port = *(mach_port_t *)argument;
mach_msg_server(exc_server, 2048, port, 0);
return NULL;
}
static NSDictionary *parse_entitlements(const void *entitlements, size_t length) {
char *copy = (char *)malloc(length);
memcpy(copy, entitlements, length);
// strip out psychic paper entitlement hiding
if (@available(iOS 13.5, *)) {
} else {
static const char *needle = "<!---><!-->";
char *found = strnstr(copy, needle, length);
if (found) {
memset(found, ' ', strlen(needle));
}
}
NSData *data = [NSData dataWithBytes:copy length:length];
free(copy);
return [NSPropertyListSerialization propertyListWithData:data
options:NSPropertyListImmutable
format:nil
error:nil];
}
static NSDictionary *app_entitlements(void) {
// Inspired by codesign.c in Darwin sources for Security.framework
// Find our mach-o header
Dl_info dl_info;
if (dladdr((const void *)app_entitlements, &dl_info) == 0)
return nil;
if (dl_info.dli_fbase == NULL)
return nil;
char *base = (char *)dl_info.dli_fbase;
struct mach_header_64 *header = (struct mach_header_64 *)dl_info.dli_fbase;
if (header->magic != MH_MAGIC_64)
return nil;
// Simulator executables have fake entitlements in the code signature. The real entitlements can be found in an __entitlements section.
size_t entitlements_size;
uint8_t *entitlements_data = getsectiondata(header, "__TEXT", "__entitlements", &entitlements_size);
if (entitlements_data != NULL) {
NSData *data = [NSData dataWithBytesNoCopy:entitlements_data
length:entitlements_size
freeWhenDone:NO];
return [NSPropertyListSerialization propertyListWithData:data
options:NSPropertyListImmutable
format:nil
error:nil];
}
// Find the LC_CODE_SIGNATURE
struct load_command *lc = (struct load_command *) (base + sizeof(*header));
struct linkedit_data_command *cs_lc = NULL;
for (uint32_t i = 0; i < header->ncmds; i++) {
if (lc->cmd == LC_CODE_SIGNATURE) {
cs_lc = (struct linkedit_data_command *) lc;
break;
}
lc = (struct load_command *) ((char *) lc + lc->cmdsize);
}
if (cs_lc == NULL)
return nil;
// Read the code signature off disk, as it's apparently not loaded into memory
NSFileHandle *fileHandle = [NSFileHandle fileHandleForReadingFromURL:NSBundle.mainBundle.executableURL error:nil];
if (fileHandle == nil)
return nil;
[fileHandle seekToFileOffset:cs_lc->dataoff];
NSData *csData = [fileHandle readDataOfLength:cs_lc->datasize];
[fileHandle closeFile];
const struct cs_superblob *cs = (const struct cs_superblob *)csData.bytes;
if (ntohl(cs->magic) != 0xfade0cc0)
return nil;
// Find the entitlements in the code signature
for (uint32_t i = 0; i < ntohl(cs->count); i++) {
struct cs_entitlements *ents = (struct cs_entitlements *) ((char *) cs + ntohl(cs->index[i].offset));
if (ntohl(ents->magic) == 0xfade7171) {
return parse_entitlements(ents->entitlements, ntohl(ents->length) - offsetof(struct cs_entitlements, entitlements));
}
}
return nil;
}
static NSDictionary *cached_app_entitlements(void) {
static NSDictionary *entitlements = nil;
if (!entitlements) {
entitlements = app_entitlements();
}
return entitlements;
}
bool jb_has_container(void) {
NSDictionary *entitlements = cached_app_entitlements();
return ![entitlements[@"com.apple.private.security.no-sandbox"] boolValue];
}
static char *childArgv[] = {NULL, "debugme", NULL};
bool jb_spawn_ptrace_child(int argc, char **argv) {
int ret; pid_t pid;
if (argc > 1 && strcmp(argv[1], childArgv[1]) == 0) {
ret = ptrace(PT_TRACE_ME, 0, NULL, 0);
NSLog(@"child: ptrace(PT_TRACE_ME) %d", ret);
exit(ret);
}
if (jb_has_container()) {
return false;
}
childArgv[0] = argv[0];
if ((ret = posix_spawnp(&pid, argv[0], NULL, NULL, (char *const *)childArgv, NULL)) != 0) {
return false;
}
return true;
}
bool jb_has_jit_entitlement(void) {
NSDictionary *entitlements = cached_app_entitlements();
return [entitlements[@"dynamic-codesigning"] boolValue];
}
bool jb_has_cs_disabled(void) {
int flags;
return !csops(getpid(), CS_OPS_STATUS, &flags, sizeof(flags)) && (flags & ~CS_KILL) == flags;
}
#define _COMM_PAGE_START_ADDRESS (0x0000000FFFFFC000ULL) /* In TTBR0 */
#define _COMM_PAGE_APRR_SUPPORT (_COMM_PAGE_START_ADDRESS+0x10C)
static bool is_device_A12_or_newer(void) {
// devices without APRR are definitely < A12
char aprr_support = *(volatile char *)_COMM_PAGE_APRR_SUPPORT;
if (aprr_support == 0) {
return false;
}
// we still have A11 devices that support APRR
struct utsname systemInfo;
if (uname(&systemInfo) != 0) {
return false;
}
// iPhone 8, 8 Plus, and iPhone X
if (strncmp("iPhone10,", systemInfo.machine, 9) == 0) {
return false;
} else {
return true;
}
}
bool jb_has_cs_execseg_allow_unsigned(void) {
NSDictionary *entitlements = cached_app_entitlements();
if (@available(iOS 14.2, *)) {
if (@available(iOS 14.4, *)) {
return false; // iOS 14.4 broke it again
}
// technically we need to check the Code Directory and make sure
// CS_EXECSEG_ALLOW_UNSIGNED is set but we assume that it is properly
// signed, which should reflect the get-task-allow entitlement
return is_device_A12_or_newer() && [entitlements[@"get-task-allow"] boolValue];
} else {
return false;
}
}
static bool jb_has_debugger_attached(void) {
int flags;
return !csops(getpid(), CS_OPS_STATUS, &flags, sizeof(flags)) && flags & CS_DEBUGGED;
}
bool jb_enable_ptrace_hack(void) {
bool debugged = jb_has_debugger_attached();
// Thanks to this comment: https://news.ycombinator.com/item?id=18431524
// We use this hack to allow mmap with PROT_EXEC (which usually requires the
// dynamic-codesigning entitlement) by tricking the process into thinking
// that Xcode is debugging it. We abuse the fact that JIT is needed to
// debug the process.
if (ptrace(PT_TRACE_ME, 0, NULL, 0) < 0) {
return false;
}
// ptracing ourselves confuses the kernel and will cause bad things to
// happen to the system (hangs…) if an exception or signal occurs. Setup
// some "safety nets" so we can cause the process to exit in a somewhat sane
// state. We only need to do this if the debugger isn't attached. (It'll do
// this itself, and if we do it we'll interfere with its normal operation
// anyways.)
if (!debugged) {
// First, ensure that signals are delivered as Mach software exceptions…
ptrace(PT_SIGEXC, 0, NULL, 0);
// …then ensure that this exception goes through our exception handler.
// I think it's OK to just watch for EXC_SOFTWARE because the other
// exceptions (e.g. EXC_BAD_ACCESS, EXC_BAD_INSTRUCTION, and friends)
// will end up being delivered as signals anyways, and we can get them
// once they're resent as a software exception.
mach_port_t port = MACH_PORT_NULL;
mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &port);
mach_port_insert_right(mach_task_self(), port, port, MACH_MSG_TYPE_MAKE_SEND);
task_set_exception_ports(mach_task_self(), EXC_MASK_SOFTWARE, port, EXCEPTION_DEFAULT, THREAD_STATE_NONE);
pthread_t thread;
pthread_create(&thread, NULL, exception_handler, (void *)&port);
}
return true;
}
#endif
float g_safeInsetLeft = 0.0;
float g_safeInsetRight = 0.0;
float g_safeInsetTop = 0.0;
float g_safeInsetBottom = 0.0;
// We no longer need to judge if jit is usable or not by according to the ios version.
static bool g_jitAvailable = true;
//static int g_iosVersionMinor;
static int g_iosVersionMajor;
static std::string version;
std::string System_GetProperty(SystemProperty prop) {
switch (prop) {
case SYSPROP_NAME:
return StringFromFormat("iOS %s", version.c_str());
case SYSPROP_LANGREGION:
return [[[NSLocale currentLocale] objectForKey:NSLocaleIdentifier] UTF8String];
case SYSPROP_BUILD_VERSION:
return PPSSPP_GIT_VERSION;
default:
return "";
}
}
std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) {
switch (prop) {
case SYSPROP_TEMP_DIRS:
default:
return std::vector<std::string>();
}
}
int64_t System_GetPropertyInt(SystemProperty prop) {
switch (prop) {
case SYSPROP_AUDIO_SAMPLE_RATE:
return 44100;
case SYSPROP_DEVICE_TYPE:
return DEVICE_TYPE_MOBILE;
case SYSPROP_SYSTEMVERSION:
return g_iosVersionMajor;
default:
return -1;
}
}
float System_GetPropertyFloat(SystemProperty prop) {
switch (prop) {
case SYSPROP_DISPLAY_REFRESH_RATE:
return 60.f;
case SYSPROP_DISPLAY_SAFE_INSET_LEFT:
return g_safeInsetLeft;
case SYSPROP_DISPLAY_SAFE_INSET_RIGHT:
return g_safeInsetRight;
case SYSPROP_DISPLAY_SAFE_INSET_TOP:
return g_safeInsetTop;
case SYSPROP_DISPLAY_SAFE_INSET_BOTTOM:
return g_safeInsetBottom;
default:
return -1;
}
}
bool System_GetPropertyBool(SystemProperty prop) {
switch (prop) {
case SYSPROP_HAS_FILE_BROWSER:
return true;
case SYSPROP_HAS_FOLDER_BROWSER:
return true;
case SYSPROP_HAS_OPEN_DIRECTORY:
return false;
case SYSPROP_HAS_BACK_BUTTON:
return false;
case SYSPROP_HAS_ACCELEROMETER:
return true;
case SYSPROP_HAS_KEYBOARD:
return true;
case SYSPROP_KEYBOARD_IS_SOFT:
// If a hardware keyboard is connected, and we add support, we could return false here.
return true;
case SYSPROP_APP_GOLD:
#ifdef GOLD
return true;
#else
return false;
#endif
case SYSPROP_CAN_JIT:
return g_jitAvailable;
case SYSPROP_LIMITED_FILE_BROWSING:
#if PPSSPP_PLATFORM(IOS_APP_STORE)
return true;
#else
return false; // But will return true in app store builds.
#endif
#ifndef HTTPS_NOT_AVAILABLE
case SYSPROP_SUPPORTS_HTTPS:
return true;
#endif
default:
return false;
}
}
void System_Notify(SystemNotification notification) {
switch (notification) {
default: break;
}
}
bool System_MakeRequest(SystemRequestType type, int requestId, const std::string &param1, const std::string &param2, int64_t param3, int64_t param4) {
switch (type) {
case SystemRequestType::EXIT_APP:
exit(0);
// The below seems right, but causes hangs. See #12140.
// dispatch_async(dispatch_get_main_queue(), ^{
// [sharedViewController shutdown];
// exit(0);
// });
break;
case SystemRequestType::BROWSE_FOR_FILE:
{
DarwinDirectoryPanelCallback callback = [requestId] (bool success, Path path) {
if (success) {
g_requestManager.PostSystemSuccess(requestId, path.c_str());
} else {
g_requestManager.PostSystemFailure(requestId);
}
};
DarwinFileSystemServices services;
services.presentDirectoryPanel(callback, /* allowFiles = */ true, /* allowDirectories = */ false);
return true;
}
case SystemRequestType::BROWSE_FOR_FOLDER:
{
DarwinDirectoryPanelCallback callback = [requestId] (bool success, Path path) {
if (success) {
g_requestManager.PostSystemSuccess(requestId, path.c_str());
} else {
g_requestManager.PostSystemFailure(requestId);
}
};
DarwinFileSystemServices services;
services.presentDirectoryPanel(callback, /* allowFiles = */ false, /* allowDirectories = */ true);
return true;
}
case SystemRequestType::CAMERA_COMMAND:
if (!strncmp(param1.c_str(), "startVideo", 10)) {
int width = 0, height = 0;
sscanf(param1.c_str(), "startVideo_%dx%d", &width, &height);
setCameraSize(width, height);
startVideo();
} else if (!strcmp(param1.c_str(), "stopVideo")) {
stopVideo();
}
return true;
case SystemRequestType::GPS_COMMAND:
if (param1 == "open") {
startLocation();
} else if (param1 == "close") {
stopLocation();
}
return true;
case SystemRequestType::SHARE_TEXT:
{
NSString *text = [NSString stringWithUTF8String:param1.c_str()];
[sharedViewController shareText:text];
return true;
}
case SystemRequestType::NOTIFY_UI_EVENT:
{
switch ((UIEventNotification)param3) {
case UIEventNotification::POPUP_CLOSED:
[sharedViewController hideKeyboard];
break;
case UIEventNotification::TEXT_GOTFOCUS:
[sharedViewController showKeyboard];
break;
case UIEventNotification::TEXT_LOSTFOCUS:
[sharedViewController hideKeyboard];
break;
default:
break;
}
return true;
}
/*
// Not 100% sure the threading is right
case SystemRequestType::COPY_TO_CLIPBOARD:
{
@autoreleasepool {
[UIPasteboard generalPasteboard].string = @(param1.c_str());
return 0;
}
}
*/
case SystemRequestType::SET_KEEP_SCREEN_BRIGHT:
dispatch_async(dispatch_get_main_queue(), ^{
INFO_LOG(SYSTEM, "SET_KEEP_SCREEN_BRIGHT: %d", (int)param3);
[[UIApplication sharedApplication] setIdleTimerDisabled: (param3 ? YES : NO)];
});
return true;
default:
return false;
}
}
void System_Toast(std::string_view text) {}
void System_AskForPermission(SystemPermission permission) {}
PermissionStatus System_GetPermissionStatus(SystemPermission permission) { return PERMISSION_STATUS_GRANTED; }
#if !PPSSPP_PLATFORM(IOS_APP_STORE)
FOUNDATION_EXTERN void AudioServicesPlaySystemSoundWithVibration(unsigned long, objc_object*, NSDictionary*);
#endif
BOOL SupportsTaptic() {
// we're on an iOS version that cannot instantiate UISelectionFeedbackGenerator, so no.
if(!NSClassFromString(@"UISelectionFeedbackGenerator")) {
return NO;
}
// http://www.mikitamanko.com/blog/2017/01/29/haptic-feedback-with-uifeedbackgenerator/
// use private API against UIDevice to determine the haptic stepping
// 2 - iPhone 7 or above, full taptic feedback
// 1 - iPhone 6S, limited taptic feedback
// 0 - iPhone 6 or below, no taptic feedback
NSNumber* val = (NSNumber*)[[UIDevice currentDevice] valueForKey:@"feedbackSupportLevel"];
return [val intValue] >= 2;
}
void System_Vibrate(int mode) {
if (SupportsTaptic()) {
PPSSPPUIApplication* app = (PPSSPPUIApplication*)[UIApplication sharedApplication];
if(app.feedbackGenerator == nil)
{
app.feedbackGenerator = [[UISelectionFeedbackGenerator alloc] init];
[app.feedbackGenerator prepare];
}
[app.feedbackGenerator selectionChanged];
} else {
#if !PPSSPP_PLATFORM(IOS_APP_STORE)
NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
NSArray *pattern = @[@YES, @30, @NO, @2];
dictionary[@"VibePattern"] = pattern;
dictionary[@"Intensity"] = @2;
AudioServicesPlaySystemSoundWithVibration(kSystemSoundID_Vibrate, nil, dictionary);
#endif
}
}
int main(int argc, char *argv[])
{
version = [[[UIDevice currentDevice] systemVersion] UTF8String];
if (2 != sscanf(version.c_str(), "%d", &g_iosVersionMajor)) {
// Just set it to 14.0 if the parsing fails for whatever reason.
g_iosVersionMajor = 14;
}
#if PPSSPP_PLATFORM(IOS_APP_STORE)
g_jitAvailable = false;
#else
// Hacky hacks to try to enable JIT by pretending to be a debugger.
csops = reinterpret_cast<decltype(csops)>(dlsym(dlopen(nullptr, RTLD_LAZY), "csops"));
exc_server = reinterpret_cast<decltype(exc_server)>(dlsym(dlopen(NULL, RTLD_LAZY), "exc_server"));
ptrace = reinterpret_cast<decltype(ptrace)>(dlsym(dlopen(NULL, RTLD_LAZY), "ptrace"));
// see https://github.com/hrydgard/ppsspp/issues/11905
if (jb_spawn_ptrace_child(argc, argv)) {
INFO_LOG(SYSTEM, "JIT: ptrace() child spawn trick\n");
} else if (jb_has_jit_entitlement()) {
INFO_LOG(SYSTEM, "JIT: found entitlement\n");
} else if (jb_has_cs_disabled()) {
INFO_LOG(SYSTEM, "JIT: CS_KILL disabled\n");
} else if (jb_has_cs_execseg_allow_unsigned()) {
INFO_LOG(SYSTEM, "JIT: CS_EXECSEG_ALLOW_UNSIGNED set\n");
} else if (jb_enable_ptrace_hack()) {
INFO_LOG(SYSTEM, "JIT: ptrace() hack supported\n");
} else {
INFO_LOG(SYSTEM, "JIT: ptrace() hack failed\n");
g_jitAvailable = false;
}
// Tried checking for JIT support here with AllocateExecutableMemory and ProtectMemoryPages,
// but it just succeeds, and then fails when you try to execute from it.
// So, we'll just resort to a version check.
// TODO: This seems outdated.
/*
if (g_iosVersionMajor > 14 || (g_iosVersionMajor == 14 && g_iosVersionMinor >= 4)) {
g_jitAvailable = false;
} else {
g_jitAvailable = true;
}
*/
#endif
// Ignore sigpipe.
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
perror("Unable to ignore SIGPIPE");
}
PROFILE_INIT();
@autoreleasepool {
return UIApplicationMain(argc, argv, NSStringFromClass([PPSSPPUIApplication class]), NSStringFromClass([AppDelegate class]));
}
}