mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-23 18:56:03 +00:00
531 lines
19 KiB
C++
531 lines
19 KiB
C++
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <switch.h>
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#include <algorithm>
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#include <cstdio>
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#include "ldr_npdm.hpp"
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#include "ldr_registration.hpp"
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#include "ldr_content_management.hpp"
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static NpdmUtils::NpdmCache g_npdm_cache = {0};
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static NpdmUtils::NpdmCache g_original_npdm_cache = {0};
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static char g_npdm_path[FS_MAX_PATH] = {0};
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Result NpdmUtils::LoadNpdmFromCache(u64 tid, NpdmInfo *out) {
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if (g_npdm_cache.info.title_id != tid) {
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return LoadNpdm(tid, out);
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}
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*out = g_npdm_cache.info;
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return ResultSuccess;
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}
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FILE *NpdmUtils::OpenNpdmFromECS(ContentManagement::ExternalContentSource *ecs) {
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std::fill(g_npdm_path, g_npdm_path + FS_MAX_PATH, 0);
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snprintf(g_npdm_path, FS_MAX_PATH, "%s:/main.npdm", ecs->mountpoint);
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return fopen(g_npdm_path, "rb");
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}
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FILE *NpdmUtils::OpenNpdmFromHBL() {
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std::fill(g_npdm_path, g_npdm_path + FS_MAX_PATH, 0);
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snprintf(g_npdm_path, FS_MAX_PATH, "hbl:/main.npdm");
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return fopen(g_npdm_path, "rb");
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}
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FILE *NpdmUtils::OpenNpdmFromExeFS() {
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std::fill(g_npdm_path, g_npdm_path + FS_MAX_PATH, 0);
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snprintf(g_npdm_path, FS_MAX_PATH, "code:/main.npdm");
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return fopen(g_npdm_path, "rb");
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}
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FILE *NpdmUtils::OpenNpdmFromSdCard(u64 title_id) {
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std::fill(g_npdm_path, g_npdm_path + FS_MAX_PATH, 0);
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snprintf(g_npdm_path, FS_MAX_PATH, "sdmc:/atmosphere/titles/%016lx/exefs/main.npdm", title_id);
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return fopen(g_npdm_path, "rb");
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}
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FILE *NpdmUtils::OpenNpdm(u64 title_id) {
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ContentManagement::ExternalContentSource *ecs = nullptr;
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if ((ecs = ContentManagement::GetExternalContentSource(title_id)) != nullptr) {
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return OpenNpdmFromECS(ecs);
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}
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/* First, check HBL. */
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if (ContentManagement::ShouldOverrideContentsWithHBL(title_id)) {
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return OpenNpdmFromHBL();
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}
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/* Next, check other override. */
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if (ContentManagement::ShouldOverrideContentsWithSD(title_id)) {
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FILE *f_out = OpenNpdmFromSdCard(title_id);
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if (f_out != NULL) {
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return f_out;
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}
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}
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/* Last resort: real exefs. */
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return OpenNpdmFromExeFS();
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}
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Result NpdmUtils::LoadNpdmInternal(FILE *f_npdm, NpdmUtils::NpdmCache *cache) {
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Result rc;
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cache->info = {};
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rc = ResultFsPathNotFound;
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if (f_npdm == NULL) {
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/* For generic "Couldn't open the file" error, just say the file doesn't exist. */
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return rc;
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}
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fseek(f_npdm, 0, SEEK_END);
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size_t npdm_size = ftell(f_npdm);
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fseek(f_npdm, 0, SEEK_SET);
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rc = ResultLoaderTooLargeMeta;
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if ((npdm_size > sizeof(cache->buffer)) || (fread(cache->buffer, 1, npdm_size, f_npdm) != npdm_size)) {
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fclose(f_npdm);
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return rc;
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}
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fclose(f_npdm);
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rc = ResultLoaderInvalidMeta;
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if (npdm_size < sizeof(NpdmUtils::NpdmHeader)) {
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return rc;
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}
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/* For ease of access... */
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cache->info.header = (NpdmUtils::NpdmHeader *)(cache->buffer);
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NpdmInfo *info = &cache->info;
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if (info->header->magic != MAGIC_META) {
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return rc;
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}
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/* 7.0.0 added 0x10 as a valid bit to NPDM flags. */
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if (GetRuntimeFirmwareVersion() >= FirmwareVersion_700) {
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if (info->header->mmu_flags > 0x1F) {
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return rc;
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}
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} else {
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if (info->header->mmu_flags > 0xF) {
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return rc;
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}
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}
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if (info->header->aci0_offset < sizeof(NpdmUtils::NpdmHeader) || info->header->aci0_size < sizeof(NpdmUtils::NpdmAci0) || info->header->aci0_offset + info->header->aci0_size > npdm_size) {
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return rc;
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}
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info->aci0 = (NpdmAci0 *)(cache->buffer + info->header->aci0_offset);
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if (info->aci0->magic != MAGIC_ACI0) {
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return rc;
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}
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if (info->aci0->fah_size > info->header->aci0_size || info->aci0->fah_offset < sizeof(NpdmUtils::NpdmAci0) || info->aci0->fah_offset + info->aci0->fah_size > info->header->aci0_size) {
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return rc;
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}
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info->aci0_fah = (void *)((uintptr_t)info->aci0 + info->aci0->fah_offset);
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if (info->aci0->sac_size > info->header->aci0_size || info->aci0->sac_offset < sizeof(NpdmUtils::NpdmAci0) || info->aci0->sac_offset + info->aci0->sac_size > info->header->aci0_size) {
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return rc;
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}
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info->aci0_sac = (void *)((uintptr_t)info->aci0 + info->aci0->sac_offset);
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if (info->aci0->kac_size > info->header->aci0_size || info->aci0->kac_offset < sizeof(NpdmUtils::NpdmAci0) || info->aci0->kac_offset + info->aci0->kac_size > info->header->aci0_size) {
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return rc;
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}
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info->aci0_kac = (void *)((uintptr_t)info->aci0 + info->aci0->kac_offset);
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if (info->header->acid_offset < sizeof(NpdmUtils::NpdmHeader) || info->header->acid_size < sizeof(NpdmUtils::NpdmAcid) || info->header->acid_offset + info->header->acid_size > npdm_size) {
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return rc;
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}
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info->acid = (NpdmAcid *)(cache->buffer + info->header->acid_offset);
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if (info->acid->magic != MAGIC_ACID) {
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return rc;
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}
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/* TODO: Check if retail flag is set if not development hardware. */
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if (info->acid->fac_size > info->header->acid_size || info->acid->fac_offset < sizeof(NpdmUtils::NpdmAcid) || info->acid->fac_offset + info->acid->fac_size > info->header->acid_size) {
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return rc;
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}
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info->acid_fac = (void *)((uintptr_t)info->acid + info->acid->fac_offset);
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if (info->acid->sac_size > info->header->acid_size || info->acid->sac_offset < sizeof(NpdmUtils::NpdmAcid) || info->acid->sac_offset + info->acid->sac_size > info->header->acid_size) {
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return rc;
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}
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info->acid_sac = (void *)((uintptr_t)info->acid + info->acid->sac_offset);
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if (info->acid->kac_size > info->header->acid_size || info->acid->kac_offset < sizeof(NpdmUtils::NpdmAcid) || info->acid->kac_offset + info->acid->kac_size > info->header->acid_size) {
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return rc;
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}
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info->acid_kac = (void *)((uintptr_t)info->acid + info->acid->kac_offset);
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rc = ResultSuccess;
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return rc;
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}
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Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
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Result rc;
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rc = LoadNpdmInternal(OpenNpdm(tid), &g_npdm_cache);
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if (R_FAILED(rc)) {
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return rc;
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}
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NpdmInfo *info = &g_npdm_cache.info;
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/* Override the ACID/ACI0 title ID, in order to facilitate HBL takeover of any title. */
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info->acid->title_id_range_min = tid;
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info->acid->title_id_range_max = tid;
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info->aci0->title_id = tid;
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if (ContentManagement::ShouldOverrideContentsWithHBL(tid) && R_SUCCEEDED(LoadNpdmInternal(OpenNpdmFromExeFS(), &g_original_npdm_cache))) {
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NpdmInfo *original_info = &g_original_npdm_cache.info;
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/* Fix pool partition. */
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if (kernelAbove500()) {
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info->acid->flags = (info->acid->flags & 0xFFFFFFC3) | (original_info->acid->flags & 0x0000003C);
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}
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/* Fix application type. */
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const u32 original_application_type = GetApplicationTypeRaw((u32 *)original_info->aci0_kac, original_info->aci0->kac_size/sizeof(u32)) & 7;
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u32 *caps = (u32 *)info->aci0_kac;
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for (unsigned int i = 0; i < info->aci0->kac_size/sizeof(u32); i++) {
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if ((caps[i] & 0x3FFF) == 0x1FFF) {
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caps[i] = (caps[i] & 0xFFFE3FFF) | (original_application_type << 14);
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}
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}
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caps = (u32 *)info->acid_kac;
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for (unsigned int i = 0; i < info->acid->kac_size/sizeof(u32); i++) {
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if ((caps[i] & 0x3FFF) == 0x1FFF) {
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caps[i] = (caps[i] & 0xFFFE3FFF) | (original_application_type << 14);
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}
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}
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}
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/* We validated! */
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info->title_id = tid;
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*out = *info;
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rc = ResultSuccess;
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return rc;
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}
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Result NpdmUtils::ValidateCapabilityAgainstRestrictions(u32 *restrict_caps, size_t num_restrict_caps, u32 *&cur_cap, size_t &caps_remaining) {
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Result rc = ResultSuccess;
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u32 desc = *cur_cap++;
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caps_remaining--;
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unsigned int low_bits = 0;
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while (desc & 1) {
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desc >>= 1;
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low_bits++;
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}
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desc >>= 1;
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u32 r_desc = 0;
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switch (low_bits) {
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case 3: /* Kernel flags. */
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rc = ResultLoaderInvalidCapabilityKernelFlags;
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for (size_t i = 0; i < num_restrict_caps; i++) {
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if ((restrict_caps[i] & 0xF) == 0x7) {
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r_desc = restrict_caps[i] >> 4;
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u32 highest_thread_prio = desc & 0x3F;
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u32 r_highest_thread_prio = r_desc & 0x3F;
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desc >>= 6;
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r_desc >>= 6;
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u32 lowest_thread_prio = desc & 0x3F;
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u32 r_lowest_thread_prio = r_desc & 0x3F;
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desc >>= 6;
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r_desc >>= 6;
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u32 lowest_cpu_id = desc & 0xFF;
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u32 r_lowest_cpu_id = r_desc & 0xFF;
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desc >>= 8;
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r_desc >>= 8;
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u32 highest_cpu_id = desc & 0xFF;
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u32 r_highest_cpu_id = r_desc & 0xFF;
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if (highest_thread_prio > r_highest_thread_prio) {
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break;
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}
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if (lowest_thread_prio > highest_thread_prio) {
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break;
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}
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if (lowest_thread_prio < r_lowest_thread_prio) {
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break;
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}
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if (lowest_cpu_id < r_lowest_cpu_id) {
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break;
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}
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if (lowest_cpu_id > r_highest_cpu_id) {
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break;
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}
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if (highest_cpu_id > r_highest_cpu_id) {
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break;
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}
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/* Valid! */
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rc = ResultSuccess;
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break;
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}
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}
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break;
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case 4: /* Syscall mask. */
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rc = ResultLoaderInvalidCapabilitySyscallMask;
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for (size_t i = 0; i < num_restrict_caps; i++) {
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if ((restrict_caps[i] & 0x1F) == 0xF) {
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r_desc = restrict_caps[i] >> 5;
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u32 syscall_base = (desc >> 24);
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u32 r_syscall_base = (r_desc >> 24);
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if (syscall_base != r_syscall_base) {
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continue;
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}
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u32 syscall_mask = desc & 0xFFFFFF;
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u32 r_syscall_mask = r_desc & 0xFFFFFF;
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if ((r_syscall_mask & syscall_mask) != syscall_mask) {
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break;
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}
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/* Valid! */
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rc = ResultSuccess;
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break;
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}
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}
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break;
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case 6: /* Map IO/Normal. */ {
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rc = ResultLoaderInvalidCapabilityMapRange;
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if (caps_remaining == 0) {
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break;
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}
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u32 next_cap = *cur_cap++;
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caps_remaining--;
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if ((next_cap & 0x7F) != 0x3F) {
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break;
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}
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u32 next_desc = next_cap >> 7;
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u32 base_addr = desc & 0xFFFFFF;
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u32 base_size = next_desc & 0xFFFFFF;
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/* Size check the mapping. */
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if (base_size >> 20) {
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break;
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}
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u32 base_end = base_addr + base_size;
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/* Validate it's possible to validate this mapping. */
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if (num_restrict_caps < 2) {
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break;
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}
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for (size_t i = 0; i < num_restrict_caps - 1; i++) {
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if ((restrict_caps[i] & 0x7F) == 0x3F) {
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r_desc = restrict_caps[i] >> 7;
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if ((restrict_caps[i+1] & 0x7F) != 0x3F) {
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break;
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}
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u32 r_next_desc = restrict_caps[++i] >> 7;
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u32 r_base_addr = r_desc & 0xFFFFFF;
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u32 r_base_size = r_next_desc & 0xFFFFFF;
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/* Size check the mapping. */
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if (r_base_size >> 20) {
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break;
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}
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u32 r_base_end = r_base_addr + r_base_size;
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/* Validate is_io matches. */
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if (((r_desc >> 24) & 1) ^ ((desc >> 24) & 1)) {
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continue;
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}
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/* Validate is_ro matches. */
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if (((r_next_desc >> 24) & 1) ^ ((next_desc >> 24) & 1)) {
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continue;
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}
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/* Validate bounds. */
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if (base_addr < r_base_addr || base_end > r_base_end) {
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continue;
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}
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/* Valid! */
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rc = ResultSuccess;
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break;
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}
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}
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}
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break;
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case 7: /* Map Normal Page. */
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rc = ResultLoaderInvalidCapabilityMapPage;
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for (size_t i = 0; i < num_restrict_caps; i++) {
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if ((restrict_caps[i] & 0xFF) == 0x7F) {
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r_desc = restrict_caps[i] >> 8;
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if (r_desc != desc) {
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continue;
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}
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/* Valid! */
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rc = ResultSuccess;
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break;
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}
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}
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break;
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case 11: /* IRQ Pair. */
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rc = ResultSuccess;
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for (unsigned int irq_i = 0; irq_i < 2; irq_i++) {
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u32 irq = desc & 0x3FF;
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desc >>= 10;
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if (irq != 0x3FF) {
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bool found = false;
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for (size_t i = 0; i < num_restrict_caps && !found; i++) {
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if ((restrict_caps[i] & 0xFFF) == 0x7FF) {
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r_desc = restrict_caps[i] >> 12;
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u32 r_irq_0 = r_desc & 0x3FF;
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r_desc >>= 10;
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u32 r_irq_1 = r_desc & 0x3FF;
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found |= irq == r_irq_0 || irq == r_irq_1;
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found |= r_irq_0 == 0x3FF && r_irq_1 == 0x3FF;
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}
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}
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if (!found) {
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rc = ResultLoaderInvalidCapabilityInterruptPair;
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break;
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}
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}
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}
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break;
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case 13: /* App Type. */
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rc = ResultLoaderInvalidCapabilityApplicationType;
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if (num_restrict_caps) {
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for (size_t i = 0; i < num_restrict_caps; i++) {
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if ((restrict_caps[i] & 0x3FFF) == 0x1FFF) {
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r_desc = restrict_caps[i] >> 14;
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break;
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}
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}
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} else {
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r_desc = 0;
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}
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if (desc == r_desc) {
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/* Valid! */
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rc = ResultSuccess;
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}
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break;
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case 14: /* Kernel Release Version. */
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rc = ResultLoaderInvalidCapabilityKernelVersion;
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if (num_restrict_caps) {
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for (size_t i = 0; i < num_restrict_caps; i++) {
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if ((restrict_caps[i] & 0x7FFF) == 0x3FFF) {
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r_desc = restrict_caps[i] >> 15;
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break;
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}
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}
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} else {
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r_desc = 0;
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}
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if (desc == r_desc) {
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/* Valid! */
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rc = ResultSuccess;
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}
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break;
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case 15: /* Handle Table Size. */
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rc = ResultLoaderInvalidCapabilityHandleTable;
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for (size_t i = 0; i < num_restrict_caps; i++) {
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if ((restrict_caps[i] & 0xFFFF) == 0x7FFF) {
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r_desc = restrict_caps[i] >> 16;
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desc &= 0x3FF;
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r_desc &= 0x3FF;
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if (desc > r_desc) {
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break;
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}
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/* Valid! */
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rc = ResultSuccess;
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break;
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}
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}
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break;
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case 16: /* Debug Flags. */
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rc = ResultLoaderInvalidCapabilityDebugFlags;
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if (num_restrict_caps) {
|
|
for (size_t i = 0; i < num_restrict_caps; i++) {
|
|
if ((restrict_caps[i] & 0x1FFFF) == 0xFFFF) {
|
|
r_desc = restrict_caps[i] >> 17;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
r_desc = 0;
|
|
}
|
|
if ((desc & ~r_desc) == 0) {
|
|
/* Valid! */
|
|
rc = ResultSuccess;
|
|
}
|
|
break;
|
|
case 32: /* Empty Descriptor. */
|
|
rc = ResultSuccess;
|
|
break;
|
|
default: /* Unrecognized Descriptor. */
|
|
rc = ResultLoaderUnknownCapability;
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
Result NpdmUtils::ValidateCapabilities(u32 *acid_caps, size_t num_acid_caps, u32 *aci0_caps, size_t num_aci0_caps) {
|
|
Result rc = ResultSuccess;
|
|
size_t remaining = num_aci0_caps;
|
|
u32 *cur_cap = aci0_caps;
|
|
while (remaining) {
|
|
if (R_FAILED((rc = ValidateCapabilityAgainstRestrictions(acid_caps, num_acid_caps, cur_cap, remaining)))) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
u32 NpdmUtils::GetApplicationType(u32 *caps, size_t num_caps) {
|
|
u32 application_type = 0;
|
|
for (unsigned int i = 0; i < num_caps; i++) {
|
|
if ((caps[i] & 0x3FFF) == 0x1FFF) {
|
|
u16 app_type = (caps[i] >> 14) & 7;
|
|
if (app_type == 1) {
|
|
application_type |= 1;
|
|
} else if (app_type == 2) {
|
|
application_type |= 2;
|
|
}
|
|
}
|
|
/* After 1.0.0, allow_debug is used as bit 4. */
|
|
if (kernelAbove200() && (caps[i] & 0x1FFFF) == 0xFFFF) {
|
|
application_type |= (caps[i] >> 15) & 4;
|
|
}
|
|
}
|
|
return application_type;
|
|
}
|
|
|
|
/* Like GetApplicationType, except this returns the raw kac descriptor value. */
|
|
u32 NpdmUtils::GetApplicationTypeRaw(u32 *caps, size_t num_caps) {
|
|
u32 application_type = 0;
|
|
for (unsigned int i = 0; i < num_caps; i++) {
|
|
if ((caps[i] & 0x3FFF) == 0x1FFF) {
|
|
return (caps[i] >> 14) & 7;
|
|
}
|
|
}
|
|
return application_type;
|
|
}
|
|
|
|
void NpdmUtils::InvalidateCache(u64 tid) {
|
|
if (g_npdm_cache.info.title_id == tid) {
|
|
g_npdm_cache.info = {};
|
|
}
|
|
}
|