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Atmosphere/libraries/libstratosphere/source/boot2/boot2_api.cpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
namespace ams::boot2 {
namespace {
/* Launch lists. */
/* psc, bus, pcv is the minimal set of required programs to get SD card. */
/* bus depends on pcie, and pcv depends on settings. */
constexpr ncm::SystemProgramId PreSdCardLaunchPrograms[] = {
ncm::SystemProgramId::Psc, /* psc */
ncm::SystemProgramId::Pcie, /* pcie */
ncm::SystemProgramId::Bus, /* bus */
ncm::SystemProgramId::Settings, /* settings */
ncm::SystemProgramId::Pcv, /* pcv */
ncm::SystemProgramId::Usb, /* usb */
};
constexpr size_t NumPreSdCardLaunchPrograms = util::size(PreSdCardLaunchPrograms);
constexpr ncm::SystemProgramId AdditionalLaunchPrograms[] = {
ncm::SystemProgramId::Tma, /* tma */
ncm::SystemProgramId::Am, /* am */
ncm::SystemProgramId::NvServices, /* nvservices */
ncm::SystemProgramId::NvnFlinger, /* nvnflinger */
ncm::SystemProgramId::Vi, /* vi */
ncm::SystemProgramId::Pgl, /* pgl */
ncm::SystemProgramId::Ns, /* ns */
ncm::SystemProgramId::LogManager, /* lm */
ncm::SystemProgramId::Ppc, /* ppc */
ncm::SystemProgramId::Ptm, /* ptm */
ncm::SystemProgramId::Hid, /* hid */
ncm::SystemProgramId::Audio, /* audio */
ncm::SystemProgramId::Lbl, /* lbl */
ncm::SystemProgramId::Wlan, /* wlan */
ncm::SystemProgramId::Bluetooth, /* bluetooth */
ncm::SystemProgramId::BsdSockets, /* bsdsockets */
ncm::SystemProgramId::Nifm, /* nifm */
ncm::SystemProgramId::Ldn, /* ldn */
ncm::SystemProgramId::Account, /* account */
ncm::SystemProgramId::Friends, /* friends */
ncm::SystemProgramId::Nfc, /* nfc */
ncm::SystemProgramId::JpegDec, /* jpegdec */
ncm::SystemProgramId::CapSrv, /* capsrv */
ncm::SystemProgramId::Ssl, /* ssl */
ncm::SystemProgramId::Nim, /* nim */
ncm::SystemProgramId::Bcat, /* bcat */
ncm::SystemProgramId::Erpt, /* erpt */
ncm::SystemProgramId::Es, /* es */
ncm::SystemProgramId::Pctl, /* pctl */
ncm::SystemProgramId::Btm, /* btm */
ncm::SystemProgramId::Eupld, /* eupld */
ncm::SystemProgramId::Glue, /* glue */
/* ncm::SystemProgramId::Eclct, */ /* eclct */ /* Skip launching error collection in Atmosphere to lessen telemetry. */
ncm::SystemProgramId::Npns, /* npns */
ncm::SystemProgramId::Fatal, /* fatal */
ncm::SystemProgramId::Ro, /* ro */
ncm::SystemProgramId::Profiler, /* profiler */
ncm::SystemProgramId::Sdb, /* sdb */
ncm::SystemProgramId::Migration, /* migration */
ncm::SystemProgramId::Grc, /* grc */
ncm::SystemProgramId::Olsc, /* olsc */
ncm::SystemProgramId::Ngct, /* ngct */
};
constexpr size_t NumAdditionalLaunchPrograms = util::size(AdditionalLaunchPrograms);
constexpr ncm::SystemProgramId AdditionalMaintenanceLaunchPrograms[] = {
ncm::SystemProgramId::Tma, /* tma */
ncm::SystemProgramId::Am, /* am */
ncm::SystemProgramId::NvServices, /* nvservices */
ncm::SystemProgramId::NvnFlinger, /* nvnflinger */
ncm::SystemProgramId::Vi, /* vi */
ncm::SystemProgramId::Pgl, /* pgl */
ncm::SystemProgramId::Ns, /* ns */
ncm::SystemProgramId::LogManager, /* lm */
ncm::SystemProgramId::Ppc, /* ppc */
ncm::SystemProgramId::Ptm, /* ptm */
ncm::SystemProgramId::Hid, /* hid */
ncm::SystemProgramId::Audio, /* audio */
ncm::SystemProgramId::Lbl, /* lbl */
ncm::SystemProgramId::Wlan, /* wlan */
ncm::SystemProgramId::Bluetooth, /* bluetooth */
ncm::SystemProgramId::BsdSockets, /* bsdsockets */
ncm::SystemProgramId::Nifm, /* nifm */
ncm::SystemProgramId::Ldn, /* ldn */
ncm::SystemProgramId::Account, /* account */
ncm::SystemProgramId::Nfc, /* nfc */
ncm::SystemProgramId::JpegDec, /* jpegdec */
ncm::SystemProgramId::CapSrv, /* capsrv */
ncm::SystemProgramId::Ssl, /* ssl */
ncm::SystemProgramId::Nim, /* nim */
ncm::SystemProgramId::Erpt, /* erpt */
ncm::SystemProgramId::Es, /* es */
ncm::SystemProgramId::Pctl, /* pctl */
ncm::SystemProgramId::Btm, /* btm */
ncm::SystemProgramId::Glue, /* glue */
/* ncm::SystemProgramId::Eclct, */ /* eclct */ /* Skip launching error collection in Atmosphere to lessen telemetry. */
ncm::SystemProgramId::Fatal, /* fatal */
ncm::SystemProgramId::Ro, /* ro */
ncm::SystemProgramId::Profiler, /* profiler */
ncm::SystemProgramId::Sdb, /* sdb */
ncm::SystemProgramId::Migration, /* migration */
ncm::SystemProgramId::Grc, /* grc */
ncm::SystemProgramId::Olsc, /* olsc */
ncm::SystemProgramId::Ngct, /* ngct */
};
constexpr size_t NumAdditionalMaintenanceLaunchPrograms = util::size(AdditionalMaintenanceLaunchPrograms);
/* Helpers. */
inline bool IsHexadecimal(const char *str) {
while (*str) {
if (!std::isxdigit(static_cast<unsigned char>(*(str++)))) {
return false;
}
}
return true;
}
inline bool IsNewLine(char c) {
return c == '\r' || c == '\n';
}
inline bool IsAllowedLaunchProgram(const ncm::ProgramLocation &loc) {
if (loc.program_id == ncm::SystemProgramId::Pgl) {
return hos::GetVersion() >= hos::Version_10_0_0;
}
return true;
}
void LaunchProgram(os::ProcessId *out_process_id, const ncm::ProgramLocation &loc, u32 launch_flags) {
os::ProcessId process_id = os::InvalidProcessId;
/* Only launch the process if we're allowed to. */
if (IsAllowedLaunchProgram(loc)) {
/* Launch, lightly validate result. */
{
const auto launch_result = pm::shell::LaunchProgram(&process_id, loc, launch_flags);
AMS_ABORT_UNLESS(!(svc::ResultOutOfResource::Includes(launch_result)));
AMS_ABORT_UNLESS(!(svc::ResultOutOfMemory::Includes(launch_result)));
AMS_ABORT_UNLESS(!(svc::ResultLimitReached::Includes(launch_result)));
}
if (out_process_id) {
*out_process_id = process_id;
}
}
}
void LaunchList(const ncm::SystemProgramId *launch_list, size_t num_entries) {
for (size_t i = 0; i < num_entries; i++) {
LaunchProgram(nullptr, ncm::ProgramLocation::Make(launch_list[i], ncm::StorageId::BuiltInSystem), 0);
}
}
bool GetGpioPadLow(GpioPadName pad) {
GpioPadSession button;
if (R_FAILED(gpioOpenSession(&button, pad))) {
return false;
}
/* Ensure we close even on early return. */
ON_SCOPE_EXIT { gpioPadClose(&button); };
/* Set direction input. */
gpioPadSetDirection(&button, GpioDirection_Input);
GpioValue val;
return R_SUCCEEDED(gpioPadGetValue(&button, &val)) && val == GpioValue_Low;
}
bool IsForceMaintenance() {
u8 force_maintenance = 1;
settings::fwdbg::GetSettingsItemValue(&force_maintenance, sizeof(force_maintenance), "boot", "force_maintenance");
return force_maintenance != 0;
}
bool IsMaintenanceMode() {
/* Contact set:sys, retrieve boot!force_maintenance. */
if (IsForceMaintenance()) {
return true;
}
/* Contact GPIO, read plus/minus buttons. */
{
return GetGpioPadLow(GpioPadName_ButtonVolUp) && GetGpioPadLow(GpioPadName_ButtonVolDown);
}
}
template<typename F>
void IterateOverFlaggedProgramsOnSdCard(F f) {
/* Validate that the contents directory exists. */
fs::DirectoryHandle contents_dir;
if (R_FAILED(fs::OpenDirectory(&contents_dir, "sdmc:/atmosphere/contents", fs::OpenDirectoryMode_Directory))) {
return;
}
ON_SCOPE_EXIT { fs::CloseDirectory(contents_dir); };
/* Iterate over entries in the contents directory */
fs::DirectoryEntry entry;
s64 count;
while (R_SUCCEEDED(fs::ReadDirectory(&count, &entry, contents_dir, 1)) && count == 1) {
/* Check that the subdirectory can be converted to a program id. */
if (std::strlen(entry.name) == 2 * sizeof(ncm::ProgramId) && IsHexadecimal(entry.name)) {
/* Check if we've already launched the program. */
ncm::ProgramId program_id{std::strtoul(entry.name, nullptr, 16)};
/* Check if the program is flagged. */
if (!cfg::HasContentSpecificFlag(program_id, "boot2")) {
continue;
}
/* Call the iteration callback. */
f(program_id);
}
}
}
void DetectAndDeclareFutureMitms() {
IterateOverFlaggedProgramsOnSdCard([](ncm::ProgramId program_id) {
/* When we find a flagged program, check if it has a mitm list. */
char mitm_list[0x400];
size_t mitm_list_size = 0;
/* Read the mitm list off the SD card. */
{
char path[fs::EntryNameLengthMax];
std::snprintf(path, sizeof(path), "sdmc:/atmosphere/contents/%016lx/mitm.lst", static_cast<u64>(program_id));
fs::FileHandle f;
if (R_FAILED(fs::OpenFile(&f, path, fs::OpenMode_Read))) {
return;
}
ON_SCOPE_EXIT { fs::CloseFile(f); };
R_ABORT_UNLESS(fs::ReadFile(&mitm_list_size, f, 0, mitm_list, sizeof(mitm_list)));
}
/* Validate read size. */
if (mitm_list_size > sizeof(mitm_list) || mitm_list_size == 0) {
return;
}
/* Iterate over the contents of the file. */
/* We expect one service name per non-empty line, 1-8 characters. */
size_t offset = 0;
while (offset < mitm_list_size) {
/* Continue to the start of the next name. */
while (IsNewLine(mitm_list[offset])) {
offset++;
}
if (offset >= mitm_list_size) {
break;
}
/* Get the length of the current name. */
size_t name_len;
for (name_len = 0; name_len <= sizeof(sm::ServiceName) && offset + name_len < mitm_list_size; name_len++) {
if (IsNewLine(mitm_list[offset + name_len])) {
break;
}
}
/* Allow empty lines. */
if (name_len == 0) {
continue;
}
/* Don't allow invalid lines. */
AMS_ABORT_UNLESS(name_len <= sizeof(sm::ServiceName));
/* Declare the service. */
R_ABORT_UNLESS(sm::mitm::DeclareFutureMitm(sm::ServiceName::Encode(mitm_list + offset, name_len)));
/* Advance to the next line. */
offset += name_len;
}
});
}
void LaunchFlaggedProgramsOnSdCard() {
IterateOverFlaggedProgramsOnSdCard([](ncm::ProgramId program_id) {
/* Check if we've already launched the program. */
if (pm::info::HasLaunchedProgram(program_id)) {
return;
}
/* Launch the program. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(program_id, ncm::StorageId::None), 0);
});
}
}
/* Boot2 API. */
void LaunchPreSdCardBootProgramsAndBoot2() {
/* This code is normally run by PM. */
/* Wait until fs.mitm has installed itself. We want this to happen as early as possible. */
R_ABORT_UNLESS(sm::mitm::WaitMitm(sm::ServiceName::Encode("fsp-srv")));
/* Launch programs required to mount the SD card. */
/* psc, bus, pcv (and usb on newer firmwares) is the minimal set of required programs. */
/* bus depends on pcie, and pcv depends on settings. */
{
/* Launch psc. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Psc, ncm::StorageId::BuiltInSystem), 0);
/* Launch pcie. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Pcie, ncm::StorageId::BuiltInSystem), 0);
/* Launch bus. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Bus, ncm::StorageId::BuiltInSystem), 0);
/* Launch settings. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Settings, ncm::StorageId::BuiltInSystem), 0);
/* NOTE: Here we work around a race condition in the boot process by ensuring that settings initializes its db. */
{
/* Connect to set:sys. */
sm::ScopedServiceHolder<::setsysInitialize, ::setsysExit> setsys_holder;
AMS_ABORT_UNLESS(setsys_holder);
/* Retrieve setting from the database. */
u8 force_maintenance = 0;
settings::fwdbg::GetSettingsItemValue(&force_maintenance, sizeof(force_maintenance), "boot", "force_maintenance");
}
/* Launch pcv. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Pcv, ncm::StorageId::BuiltInSystem), 0);
/* Launch usb. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Usb, ncm::StorageId::BuiltInSystem), 0);
}
/* Wait for the SD card required services to be ready. */
cfg::WaitSdCardRequiredServicesReady();
/* Wait for other atmosphere mitm modules to initialize. */
R_ABORT_UNLESS(sm::mitm::WaitMitm(sm::ServiceName::Encode("set:sys")));
if (hos::GetVersion() >= hos::Version_2_0_0) {
R_ABORT_UNLESS(sm::mitm::WaitMitm(sm::ServiceName::Encode("bpc")));
} else {
R_ABORT_UNLESS(sm::mitm::WaitMitm(sm::ServiceName::Encode("bpc:c")));
}
/* Launch Atmosphere boot2, using NcmStorageId_None to force SD card boot. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Boot2, ncm::StorageId::None), 0);
}
void LaunchPostSdCardBootPrograms() {
/* This code is normally run by boot2. */
/* Find out whether we are maintenance mode. */
const bool maintenance = IsMaintenanceMode();
if (maintenance) {
pm::bm::SetMaintenanceBoot();
}
/* Launch Atmosphere dmnt, using NcmStorageId_None to force SD card boot. */
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Dmnt, ncm::StorageId::None), 0);
/* Check for and forward declare non-atmosphere mitm modules. */
DetectAndDeclareFutureMitms();
/* Launch additional programs. */
if (maintenance) {
LaunchList(AdditionalMaintenanceLaunchPrograms, NumAdditionalMaintenanceLaunchPrograms);
/* Starting in 7.0.0, npns is launched during maintenance boot. */
if (hos::GetVersion() >= hos::Version_7_0_0) {
LaunchProgram(nullptr, ncm::ProgramLocation::Make(ncm::SystemProgramId::Npns, ncm::StorageId::BuiltInSystem), 0);
}
} else {
LaunchList(AdditionalLaunchPrograms, NumAdditionalLaunchPrograms);
}
/* Launch user programs off of the SD. */
LaunchFlaggedProgramsOnSdCard();
}
}
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