Atmosphere/stratosphere/ro/source/ro_registration.cpp
2019-04-21 05:28:57 -07:00

244 lines
8.7 KiB
C++

/*
* Copyright (c) 2018-2019 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 <switch.h>
#include <cstdio>
#include <algorithm>
#include <stratosphere.hpp>
#include "ro_registration.hpp"
#include "ro_map.hpp"
#include "ro_nrr.hpp"
/* Declare process contexts as global array. */
static Registration::RoProcessContext g_process_contexts[Registration::MaxSessions] = {};
static bool g_is_development_hardware, g_is_development_function_enabled;
void Registration::Initialize() {
if (R_FAILED(splInitialize())) {
std::abort();
}
ON_SCOPE_EXIT { splExit(); };
if (R_FAILED(splIsDevelopment(&g_is_development_hardware))) {
std::abort();
}
{
u64 out_val = 0;
if (R_FAILED(splGetConfig(SplConfigItem_IsDebugMode, &out_val))) {
std::abort();
}
g_is_development_function_enabled = out_val != 0;
}
}
bool Registration::ShouldEaseNroRestriction() {
bool should_ease = false;
if (R_FAILED(setsysGetSettingsItemValue("ro", "ease_nro_restriction", &should_ease, sizeof(should_ease)))) {
return false;
}
/* Nintendo only allows easing restriction on dev, we will allow on production, as well. */
/* should_ease &= g_is_development_function_enabled; */
return should_ease;
}
Result Registration::RegisterProcess(RoProcessContext **out_context, Handle process_handle, u64 process_id) {
/* Check if a process context already exists. */
for (size_t i = 0; i < Registration::MaxSessions; i++) {
if (g_process_contexts[i].process_id == process_id) {
return ResultRoInvalidSession;
}
}
/* Find a free process context. */
for (size_t i = 0; i < Registration::MaxSessions; i++) {
if (!g_process_contexts[i].in_use) {
g_process_contexts[i].process_id = process_id;
g_process_contexts[i].process_handle = process_handle;
g_process_contexts[i].in_use = true;
*out_context = &g_process_contexts[i];
return ResultSuccess;
}
}
/* Failure to find a free context is actually an abort condition. */
/* TODO: Should this return an unofficial error code? */
std::abort();
}
void Registration::UnregisterProcess(RoProcessContext *context) {
if (context->process_handle != INVALID_HANDLE) {
for (size_t i = 0; i < Registration::MaxNrrInfos; i++) {
if (context->nrr_in_use[i]) {
UnmapNrr(context->process_handle, context->nrr_infos[i].header, context->nrr_infos[i].nrr_heap_address, context->nrr_infos[i].nrr_heap_size, context->nrr_infos[i].mapped_code_address);
}
}
}
std::memset(context, 0, sizeof(*context));
}
Result Registration::GetProcessModuleInfo(u32 *out_count, LoaderModuleInfo *out_infos, size_t max_out_count, u64 process_id) {
size_t count = 0;
for (size_t sess = 0; sess < Registration::MaxSessions; sess++) {
if (g_process_contexts[sess].process_id == process_id) {
/* For convenience, helper. */
const RoProcessContext *context = &g_process_contexts[sess];
for (size_t i = 0; i < Registration::MaxNroInfos && count < max_out_count; i++) {
if (!context->nro_in_use[i]) {
continue;
}
/* Just copy out the info. */
LoaderModuleInfo *out_info = &out_infos[count++];
memcpy(out_info->build_id, &context->nro_infos[i].module_id, sizeof(context->nro_infos[i].module_id));
out_info->base_address = context->nro_infos[i].base_address;
out_info->size = context->nro_infos[i].nro_heap_size + context->nro_infos[i].bss_heap_size;
}
break;
}
}
*out_count = static_cast<u32>(count);
return ResultSuccess;
}
Result Registration::LoadNrr(RoProcessContext *context, u64 title_id, u64 nrr_address, u64 nrr_size, RoModuleType expected_type, bool enforce_type) {
/* Validate address/size. */
if (nrr_address & 0xFFF) {
return ResultRoInvalidAddress;
}
if (nrr_size == 0 || (nrr_size & 0xFFF) || !(nrr_address < nrr_address + nrr_size)) {
return ResultRoInvalidSize;
}
/* Check we have space for a new NRR. */
size_t slot = 0;
for (slot = 0; slot < Registration::MaxNrrInfos; slot++) {
if (!context->nrr_in_use[slot]) {
break;
}
}
if (slot == Registration::MaxNrrInfos) {
return ResultRoTooManyNrr;
}
NrrInfo *nrr_info = &context->nrr_infos[slot];
/* Map. */
NrrHeader *header = nullptr;
u64 mapped_code_address = 0;
Result rc = MapAndValidateNrr(&header, &mapped_code_address, context->process_handle, title_id, nrr_address, nrr_size, expected_type, enforce_type);
if (R_FAILED(rc)) {
return rc;
}
/* Set NRR info. */
nrr_info->header = header;
nrr_info->nrr_heap_address = nrr_address;
nrr_info->nrr_heap_size = nrr_size;
nrr_info->mapped_code_address = mapped_code_address;
context->nrr_in_use[slot] = true;
/* TODO. */
return ResultSuccess;
}
Result Registration::UnloadNrr(RoProcessContext *context, u64 nrr_address) {
/* Validate address. */
if (nrr_address & 0xFFF) {
return ResultRoInvalidAddress;
}
/* Check the NRR is loaded. */
size_t slot = 0;
for (slot = 0; slot < Registration::MaxNrrInfos; slot++) {
if (!context->nrr_in_use[slot]) {
continue;
}
if (context->nrr_infos[slot].nrr_heap_address == nrr_address) {
break;
}
}
if (slot == Registration::MaxNrrInfos) {
return ResultRoNotRegistered;
}
/* Unmap. */
const NrrInfo nrr_info = context->nrr_infos[slot];
{
/* Nintendo does this unconditionally, whether or not the actual unmap succeeds. */
context->nrr_in_use[slot] = false;
std::memset(&context->nrr_infos[slot], 0, sizeof(context->nrr_infos[slot]));
}
return UnmapNrr(context->process_handle, nrr_info.header, nrr_info.nrr_heap_address, nrr_info.nrr_heap_size, nrr_info.mapped_code_address);
}
Result Registration::MapAndValidateNrr(NrrHeader **out_header, u64 *out_mapped_code_address, Handle process_handle, u64 title_id, u64 nrr_heap_address, u64 nrr_heap_size, RoModuleType expected_type, bool enforce_type) {
Result rc;
MappedCodeMemory nrr_mcm;
/* First, map the NRR. */
if (R_FAILED((rc = MapUtils::MapCodeMemoryForProcess(nrr_mcm, process_handle, true, nrr_heap_address, nrr_heap_size)))) {
if (GetRuntimeFirmwareVersion() < FirmwareVersion_300) {
/* Try mapping as 32-bit, since we might have guessed wrong on < 3.0.0. */
rc = MapUtils::MapCodeMemoryForProcess(nrr_mcm, process_handle, false, nrr_heap_address, nrr_heap_size);
}
if (R_FAILED(rc)) {
return rc;
}
}
const u64 code_address = nrr_mcm.GetDstAddress();
u64 map_address;
if (R_FAILED(MapUtils::LocateSpaceForMap(&map_address, nrr_heap_size))) {
return ResultRoInsufficientAddressSpace;
}
/* Nintendo...does not check the return value of this map. We will check, instead of aborting if it fails. */
AutoCloseMap nrr_map(map_address, process_handle, code_address, nrr_heap_size);
if (!nrr_map.IsSuccess()) {
return nrr_map.GetResult();
}
NrrHeader *nrr_header = reinterpret_cast<NrrHeader *>(map_address);
if (R_FAILED((rc = NrrUtils::ValidateNrr(nrr_header, nrr_heap_size, title_id, expected_type, enforce_type)))) {
return rc;
}
/* Invalidation here actually prevents them from unmapping at scope exit. */
nrr_map.Invalidate();
nrr_mcm.Invalidate();
*out_header = nrr_header;
*out_mapped_code_address = code_address;
return ResultSuccess;
}
Result Registration::UnmapNrr(Handle process_handle, const NrrHeader *header, u64 nrr_heap_address, u64 nrr_heap_size, u64 mapped_code_address) {
Result rc = svcUnmapProcessMemory((void *)header, process_handle, mapped_code_address, nrr_heap_size);
if (R_FAILED(rc)) {
return rc;
}
return svcUnmapProcessCodeMemory(process_handle, mapped_code_address, nrr_heap_address, nrr_heap_size);
}