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Atmosphere/stratosphere/loader/source/ldr_process_creation.cpp

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/*
* Copyright (c) 2018 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 <algorithm>
#include "ldr_process_creation.hpp"
#include "ldr_registration.hpp"
#include "ldr_launch_queue.hpp"
#include "ldr_content_management.hpp"
#include "ldr_npdm.hpp"
#include "ldr_nso.hpp"
Result ProcessCreation::InitializeProcessInfo(NpdmUtils::NpdmInfo *npdm, Handle reslimit_h, u64 arg_flags, ProcessInfo *out_proc_info) {
/* Initialize a ProcessInfo using an npdm. */
*out_proc_info = (const ProcessCreation::ProcessInfo){0};
/* Copy all but last char of name, insert NULL terminator. */
std::copy(npdm->header->title_name, npdm->header->title_name + sizeof(out_proc_info->name) - 1, out_proc_info->name);
out_proc_info->name[sizeof(out_proc_info->name) - 1] = 0;
/* Set title id. */
out_proc_info->title_id = npdm->aci0->title_id;
/* Set process category. */
out_proc_info->process_category = npdm->header->process_category;
/* Copy reslimit handle raw. */
out_proc_info->reslimit_h = reslimit_h;
/* Set IsAddressSpace64Bit, AddressSpaceType. */
if (npdm->header->mmu_flags & 8) {
/* Invalid Address Space Type. */
return 0x809;
}
out_proc_info->process_flags = (npdm->header->mmu_flags & 0xF);
/* Set Bit 4 (?) and EnableAslr based on argument flags. */
out_proc_info->process_flags |= ((arg_flags & 3) << 4) ^ 0x20;
/* Set UseSystemMemBlocks if application type is 1. */
u32 application_type = NpdmUtils::GetApplicationType((u32 *)npdm->aci0_kac, npdm->aci0->kac_size / sizeof(u32));
if ((application_type & 3) == 1) {
out_proc_info->process_flags |= 0x40;
}
/* 3.0.0+ System Resource Size. */
if (kernelAbove300()) {
if (npdm->header->system_resource_size & 0x1FFFFF) {
return 0xA409;
}
if (npdm->header->system_resource_size) {
if ((out_proc_info->process_flags & 6) == 0) {
return 0x809;
}
if (!(((application_type & 3) == 1) || (kernelAbove600() && (application_type & 3) == 2))) {
return 0x809;
}
if (npdm->header->system_resource_size > 0x1FE00000) {
return 0x809;
}
}
out_proc_info->system_resource_num_pages = npdm->header->system_resource_size >> 12;
} else {
out_proc_info->system_resource_num_pages = 0;
}
/* 5.0.0+ Pool Partition. */
if (kernelAbove500()) {
u32 pool_partition_id = (npdm->acid->flags >> 2) & 0xF;
switch (pool_partition_id) {
case 0: /* Application. */
if ((application_type & 3) == 2) {
out_proc_info->process_flags |= 0x80;
}
break;
case 1: /* Applet. */
out_proc_info->process_flags |= 0x80;
break;
case 2: /* Sysmodule. */
out_proc_info->process_flags |= 0x100;
break;
case 3: /* nvservices. */
out_proc_info->process_flags |= 0x180;
break;
default:
return 0x809;
}
}
return 0x0;
}
Result ProcessCreation::CreateProcess(Handle *out_process_h, u64 index, char *nca_path, LaunchQueue::LaunchItem *launch_item, u64 arg_flags, Handle reslimit_h) {
NpdmUtils::NpdmInfo npdm_info = {0};
ProcessInfo process_info = {0};
NsoUtils::NsoLoadExtents nso_extents = {0};
Registration::Process *target_process;
Handle process_h = 0;
u64 process_id = 0;
bool mounted_code = false;
Result rc;
/* Get the process from the registration queue. */
target_process = Registration::GetProcess(index);
if (target_process == NULL) {
return 0x1009;
}
/* Mount the title's exefs. */
if (target_process->tid_sid.storage_id != FsStorageId_None) {
rc = ContentManagement::MountCodeForTidSid(&target_process->tid_sid);
if (R_FAILED(rc)) {
return rc;
}
mounted_code = true;
} else {
if (R_SUCCEEDED(ContentManagement::MountCodeNspOnSd(target_process->tid_sid.title_id))) {
mounted_code = true;
}
}
/* Load the process's NPDM. */
rc = NpdmUtils::LoadNpdmFromCache(target_process->tid_sid.title_id, &npdm_info);
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Validate the title we're loading is what we expect. */
if (npdm_info.aci0->title_id < npdm_info.acid->title_id_range_min || npdm_info.aci0->title_id > npdm_info.acid->title_id_range_max) {
rc = 0x1209;
goto CREATE_PROCESS_END;
}
/* Validate that the ACI0 Kernel Capabilities are valid and restricted by the ACID Kernel Capabilities. */
rc = NpdmUtils::ValidateCapabilities((u32 *)npdm_info.acid_kac, npdm_info.acid->kac_size/sizeof(u32), (u32 *)npdm_info.aci0_kac, npdm_info.aci0->kac_size/sizeof(u32));
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Read in all NSO headers, see what NSOs are present. */
rc = NsoUtils::LoadNsoHeaders(npdm_info.aci0->title_id);
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Validate that the set of NSOs to be loaded is correct. */
rc = NsoUtils::ValidateNsoLoadSet();
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Initialize the ProcessInfo. */
rc = ProcessCreation::InitializeProcessInfo(&npdm_info, reslimit_h, arg_flags, &process_info);
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Figure out where NSOs will be mapped, and how much space they (and arguments) will take up. */
rc = NsoUtils::CalculateNsoLoadExtents(process_info.process_flags, launch_item != NULL ? launch_item->arg_size : 0, &nso_extents);
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Set Address Space information in ProcessInfo. */
process_info.code_addr = nso_extents.base_address;
process_info.code_num_pages = nso_extents.total_size + 0xFFF;
process_info.code_num_pages >>= 12;
/* Call svcCreateProcess(). */
rc = svcCreateProcess(&process_h, &process_info, (u32 *)npdm_info.aci0_kac, npdm_info.aci0->kac_size/sizeof(u32));
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Load all NSOs into Process memory, and set permissions accordingly. */
if (launch_item != NULL) {
rc = NsoUtils::LoadNsosIntoProcessMemory(process_h, npdm_info.aci0->title_id, &nso_extents, (u8 *)launch_item->args, launch_item->arg_size);
} else {
rc = NsoUtils::LoadNsosIntoProcessMemory(process_h, npdm_info.aci0->title_id, &nso_extents, NULL, 0);
}
if (R_FAILED(rc)) {
goto CREATE_PROCESS_END;
}
/* Update the list of registered processes with the new process. */
svcGetProcessId(&process_id, process_h);
bool is_64_bit_addspace;
if (kernelAbove200()) {
is_64_bit_addspace = (((npdm_info.header->mmu_flags >> 1) & 5) | 2) == 3;
} else {
is_64_bit_addspace = (npdm_info.header->mmu_flags & 0xE) == 0x2;
}
Registration::SetProcessIdTidAndIs64BitAddressSpace(index, process_id, npdm_info.aci0->title_id, is_64_bit_addspace);
for (unsigned int i = 0; i < NSO_NUM_MAX; i++) {
if (NsoUtils::IsNsoPresent(i)) {
Registration::AddNsoInfo(index, nso_extents.nso_addresses[i], nso_extents.nso_sizes[i], NsoUtils::GetNsoBuildId(i));
}
}
/* Send the pid/tid pair to anyone interested in man-in-the-middle-attacking it. */
Registration::AssociatePidTidForMitM(index);
rc = 0;
/* ECS is a one-shot operation, but we don't clear on failure. */
ContentManagement::ClearExternalContentSource(target_process->tid_sid.title_id);
if (mounted_code) {
if (R_SUCCEEDED(rc) && target_process->tid_sid.storage_id != FsStorageId_None) {
rc = ContentManagement::UnmountCode();
} else {
ContentManagement::UnmountCode();
}
}
CREATE_PROCESS_END:
if (R_SUCCEEDED(rc)) {
*out_process_h = process_h;
} else {
svcCloseHandle(process_h);
}
return rc;
}
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