pm: add api for ams.mitm to steal application memory

subrepo:
  subdir:   "emummc"
  merged:   "30205111e"
upstream:
  origin:   "https://github.com/m4xw/emummc"
  branch:   "develop"
  commit:   "30205111e"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

docs/changelog.md

@@ -1,4 +1,15 @@
 # Changelog
+## 1.5.3
++ Support was added for 16.0.3.
++ Atmosphère was updated to use GCC 13/newlib (latest devkitA64/devkitARM releases).
+  + **Please note**: This introduces a known issue, which is currently being worked on.
+    + As you may recall from the 1.4.1 changelog, Fire Emblem: Engage requires enormous amounts of memory to support using layeredfs mods with the game.
+    + Latest GCC/newlib slightly increases malloc overhead size, which makes the previous memory increase insufficient.
+    + A general-case solution to this is in the works, which should hopefully fix the problem in a way that doesn't jinx me for the future.
++ A number of minor issues were fixed and improvements were made, including:
+  + An issue was fixed that caused system font replacement to not work on 16.0.0+.
+  + An minor accuracy issue was addressed in mesosphere's management of certain memory ranges; this issue would have had zero visible impact to the end-user.
++ General system stability improvements to enhance the user's experience.
 ## 1.5.2
 + A homebrew application (`haze`) was added for performing USB file transfer (with thanks to @liamwhite for both design and implementation).
   + `haze` is included with atmosphère, and provides access to the SD card via the PTP/MTP protocol.

emummc/.gitrepo

@@ -6,7 +6,7 @@
 [subrepo]
 	remote = https://github.com/m4xw/emummc
 	branch = develop
-	commit = bba1f1fb65f75721caf6d023a35d75d3c9aafd0f
+	commit = 30205111ee375bef96f0f76cb6a3130a2f0fc85c
-	parent = 1ab8b234447864503e21c600681219a96962e6c1
+	parent = 81e9154a52a976f85317bddd0131426599d26a62
 	method = merge
 	cmdver = 0.4.1

emummc/README.md

@@ -2,7 +2,7 @@
 *A SDMMC driver replacement for Nintendo's Filesystem Services, by **m4xw***  
 
 ### Supported Horizon Versions
-**1.0.0 - 16.0.0**
+**1.0.0 - 16.0.3**
 
 ## Features
 * Arbitrary SDMMC backend selection  

emummc/source/FS/FS_offsets.c

@@ -65,6 +65,8 @@
 #include "offsets/1500_exfat.h"
 #include "offsets/1600.h"
 #include "offsets/1600_exfat.h"
+#include "offsets/1603.h"
+#include "offsets/1603_exfat.h"
 #include "../utils/fatal.h"
 
 #define GET_OFFSET_STRUCT_NAME(vers) g_offsets##vers
@@ -141,6 +143,8 @@ DEFINE_OFFSET_STRUCT(_1500);
 DEFINE_OFFSET_STRUCT(_1500_EXFAT);
 DEFINE_OFFSET_STRUCT(_1600);
 DEFINE_OFFSET_STRUCT(_1600_EXFAT);
+DEFINE_OFFSET_STRUCT(_1603);
+DEFINE_OFFSET_STRUCT(_1603_EXFAT);
 
 const fs_offsets_t *get_fs_offsets(enum FS_VER version) {
     switch (version) {
@@ -242,6 +246,10 @@ const fs_offsets_t *get_fs_offsets(enum FS_VER version) {
             return &(GET_OFFSET_STRUCT_NAME(_1600));
         case FS_VER_16_0_0_EXFAT:
             return &(GET_OFFSET_STRUCT_NAME(_1600_EXFAT));
+        case FS_VER_16_0_3:
+            return &(GET_OFFSET_STRUCT_NAME(_1603));
+        case FS_VER_16_0_3_EXFAT:
+            return &(GET_OFFSET_STRUCT_NAME(_1603_EXFAT));
         default:
             fatal_abort(Fatal_UnknownVersion);
     }

emummc/source/FS/FS_versions.h

@@ -95,6 +95,9 @@ enum FS_VER
     FS_VER_16_0_0,
     FS_VER_16_0_0_EXFAT,
 
+    FS_VER_16_0_3,
+    FS_VER_16_0_3_EXFAT,
+
     FS_VER_MAX,
 };
 

emummc/source/FS/offsets/1603.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2019 m4xw <m4x@m4xw.net>
+ * Copyright (c) 2019 Atmosphere-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/>.
+ */
+#ifndef __FS_1603_H__
+#define __FS_1603_H__
+
+// Accessor vtable getters
+#define FS_OFFSET_1603_SDMMC_ACCESSOR_GC   0x1862F0
+#define FS_OFFSET_1603_SDMMC_ACCESSOR_SD   0x187F70
+#define FS_OFFSET_1603_SDMMC_ACCESSOR_NAND 0x1867B0
+
+// Hooks
+#define FS_OFFSET_1603_SDMMC_WRAPPER_READ  0x182240
+#define FS_OFFSET_1603_SDMMC_WRAPPER_WRITE 0x1822A0
+#define FS_OFFSET_1603_RTLD                0x269B0
+#define FS_OFFSET_1603_RTLD_DESTINATION    ((uintptr_t)(INT64_C(-0x3C)))
+
+#define FS_OFFSET_1603_CLKRST_SET_MIN_V_CLK_RATE 0x1A2D80
+
+// Misc funcs
+#define FS_OFFSET_1603_LOCK_MUTEX          0x17B780
+#define FS_OFFSET_1603_UNLOCK_MUTEX        0x17B7D0
+
+#define FS_OFFSET_1603_SDMMC_WRAPPER_CONTROLLER_OPEN  0x182200
+#define FS_OFFSET_1603_SDMMC_WRAPPER_CONTROLLER_CLOSE 0x182220
+
+// Misc Data
+#define FS_OFFSET_1603_SD_MUTEX            0xFFB3F0
+#define FS_OFFSET_1603_NAND_MUTEX          0xFF6B58
+#define FS_OFFSET_1603_ACTIVE_PARTITION    0xFF6B98
+#define FS_OFFSET_1603_SDMMC_DAS_HANDLE    0xFDC8B0
+
+// NOPs
+#define FS_OFFSET_1603_SD_DAS_INIT         0x258D4
+
+// Nintendo Paths
+#define FS_OFFSET_1603_NINTENDO_PATHS \
+{ \
+	{.opcode_reg = 3, .adrp_offset = 0x00063B98, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 3, .adrp_offset = 0x00070DBC, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 4, .adrp_offset = 0x0007795C, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 4, .adrp_offset = 0x0008A7A4, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 0, .adrp_offset = 0, .add_rel_offset = 0}, \
+}
+
+#endif // __FS_1603_H__

emummc/source/FS/offsets/1603_exfat.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2019 m4xw <m4x@m4xw.net>
+ * Copyright (c) 2019 Atmosphere-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/>.
+ */
+#ifndef __FS_1603_EXFAT_H__
+#define __FS_1603_EXFAT_H__
+
+// Accessor vtable getters
+#define FS_OFFSET_1603_EXFAT_SDMMC_ACCESSOR_GC   0x190FD0
+#define FS_OFFSET_1603_EXFAT_SDMMC_ACCESSOR_SD   0x192C50
+#define FS_OFFSET_1603_EXFAT_SDMMC_ACCESSOR_NAND 0x191490
+
+// Hooks
+#define FS_OFFSET_1603_EXFAT_SDMMC_WRAPPER_READ  0x18CF20
+#define FS_OFFSET_1603_EXFAT_SDMMC_WRAPPER_WRITE 0x18CF80
+#define FS_OFFSET_1603_EXFAT_RTLD                0x269B0
+#define FS_OFFSET_1603_EXFAT_RTLD_DESTINATION    ((uintptr_t)(INT64_C(-0x3C)))
+
+#define FS_OFFSET_1603_EXFAT_CLKRST_SET_MIN_V_CLK_RATE 0x1ADA60
+
+// Misc funcs
+#define FS_OFFSET_1603_EXFAT_LOCK_MUTEX          0x186460
+#define FS_OFFSET_1603_EXFAT_UNLOCK_MUTEX        0x1864B0
+
+#define FS_OFFSET_1603_EXFAT_SDMMC_WRAPPER_CONTROLLER_OPEN  0x18CEE0
+#define FS_OFFSET_1603_EXFAT_SDMMC_WRAPPER_CONTROLLER_CLOSE 0x18CF00
+
+// Misc Data
+#define FS_OFFSET_1603_EXFAT_SD_MUTEX            0x100D3F0
+#define FS_OFFSET_1603_EXFAT_NAND_MUTEX          0x1008B58
+#define FS_OFFSET_1603_EXFAT_ACTIVE_PARTITION    0x1008B98
+#define FS_OFFSET_1603_EXFAT_SDMMC_DAS_HANDLE    0xFE98B0
+
+// NOPs
+#define FS_OFFSET_1603_EXFAT_SD_DAS_INIT         0x258D4
+
+// Nintendo Paths
+#define FS_OFFSET_1603_EXFAT_NINTENDO_PATHS \
+{ \
+	{.opcode_reg = 3, .adrp_offset = 0x00063B98, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 3, .adrp_offset = 0x00070DBC, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 4, .adrp_offset = 0x0007795C, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 4, .adrp_offset = 0x0008A7A4, .add_rel_offset = 0x00000004}, \
+	{.opcode_reg = 0, .adrp_offset = 0, .add_rel_offset = 0}, \
+}
+
+#endif // __FS_1603_EXFAT_H__

fusee/program/source/fusee_stratosphere.cpp

@@ -162,6 +162,9 @@ namespace ams::nxboot {
             FsVersion_16_0_0,
             FsVersion_16_0_0_Exfat,
 
+            FsVersion_16_0_3,
+            FsVersion_16_0_3_Exfat,
+
             FsVersion_Count,
         };
 
@@ -239,6 +242,9 @@ namespace ams::nxboot {
 
             { 0x56, 0xE8, 0x56, 0x56, 0x6C, 0x38, 0xD8, 0xBE }, /* FsVersion_16_0_0 */
             { 0xCF, 0xAB, 0x45, 0x0C, 0x2C, 0x53, 0x9D, 0xA9 }, /* FsVersion_16_0_0_Exfat */
+
+            { 0x39, 0xEE, 0x1F, 0x1E, 0x0E, 0xA7, 0x32, 0x5D }, /* FsVersion_16_0_3 */
+            { 0x62, 0xC6, 0x5E, 0xFD, 0x9A, 0xBF, 0x7C, 0x43 }, /* FsVersion_16_0_3_Exfat */
         };
 
         const InitialProcessBinaryHeader *FindInitialProcessBinary(const pkg2::Package2Header *header, const u8 *data, ams::TargetFirmware target_firmware) {
@@ -656,6 +662,14 @@ namespace ams::nxboot {
                     AddPatch(fs_meta, 0x1913B9, NogcPatch0, sizeof(NogcPatch0));
                     AddPatch(fs_meta, 0x16B950, NogcPatch1, sizeof(NogcPatch1));
                     break;
+                case FsVersion_16_0_3:
+                    AddPatch(fs_meta, 0x186729, NogcPatch0, sizeof(NogcPatch0));
+                    AddPatch(fs_meta, 0x160CC0, NogcPatch1, sizeof(NogcPatch1));
+                    break;
+                case FsVersion_16_0_3_Exfat:
+                    AddPatch(fs_meta, 0x191409, NogcPatch0, sizeof(NogcPatch0));
+                    AddPatch(fs_meta, 0x16B9A0, NogcPatch1, sizeof(NogcPatch1));
+                    break;
                 default:
                     break;
             }

libraries/.gitrepo

@@ -6,7 +6,7 @@
 [subrepo]
 	remote = https://github.com/Atmosphere-NX/Atmosphere-libs
 	branch = master
-	commit = ecc8b18111730acef0a353f6f61c45c1f143a793
+	commit = cd0fc2c1d5728ec45414aaaa6efa28c269695992
-	parent = d8aed7de6d39dd29b75e34f24d376decfb77a5b4
+	parent = 8ec7c096d04e6f9586be2cb785840cd482d4b900
 	method = merge
 	cmdver = 0.4.1

libraries/libstratosphere/include/stratosphere/hos/hos_types.hpp

@@ -78,6 +78,7 @@ namespace ams::hos {
         Version_16_0_0  = ::ams::TargetFirmware_16_0_0,
         Version_16_0_1  = ::ams::TargetFirmware_16_0_1,
         Version_16_0_2  = ::ams::TargetFirmware_16_0_2,
+        Version_16_0_3  = ::ams::TargetFirmware_16_0_3,
 
         Version_Current = ::ams::TargetFirmware_Current,
 

libraries/libstratosphere/include/stratosphere/pm/impl/pm_shell_interface.hpp

@@ -30,7 +30,8 @@
     AMS_SF_METHOD_INFO(C, H,  7,    Result, BoostSystemMemoryResourceLimit,                  (u64 boost_size),                                                                    (boost_size))                                     \
     AMS_SF_METHOD_INFO(C, H,  8,    Result, BoostApplicationThreadResourceLimit,             (),                                                                                  ())                                               \
     AMS_SF_METHOD_INFO(C, H,  9,    void,   GetBootFinishedEventHandle,                      (sf::OutCopyHandle out),                                                             (out),                        hos::Version_8_0_0) \
-    AMS_SF_METHOD_INFO(C, H, 10, Result, BoostSystemThreadResourceLimit,      (),                                                                                  ())
+    AMS_SF_METHOD_INFO(C, H, 10,    Result, BoostSystemThreadResourceLimit,                  (),                                                                                  ())                                               \
+    AMS_SF_METHOD_INFO(C, H, 65000, Result, AtmosphereBoostSystemMemoryResourceLimitForMitm, (u64 boost_size),                                                                    (boost_size))
 
 AMS_SF_DEFINE_INTERFACE(ams::pm::impl, IShellInterface, AMS_PM_I_SHELL_INTERFACE_INTERFACE_INFO, 0x387D60C0)
 
@@ -44,6 +45,8 @@ AMS_SF_DEFINE_INTERFACE(ams::pm::impl, IShellInterface, AMS_PM_I_SHELL_INTERFACE
     AMS_SF_METHOD_INFO(C, H, 6,     Result, ClearExceptionOccurred,                          (os::ProcessId process_id),                                                          (process_id))                                     \
     AMS_SF_METHOD_INFO(C, H, 7,     void,   NotifyBootFinished,                              (),                                                                                  ())                                               \
     AMS_SF_METHOD_INFO(C, H, 8,     Result, GetApplicationProcessIdForShell,                 (sf::Out<os::ProcessId> out),                                                        (out))                                            \
-    AMS_SF_METHOD_INFO(C, H, 9, Result, BoostSystemMemoryResourceLimit,  (u64 boost_size),                                                                    (boost_size),                 hos::Version_4_0_0)
+    AMS_SF_METHOD_INFO(C, H, 9,     Result, BoostSystemMemoryResourceLimit,                  (u64 boost_size),                                                                    (boost_size),                 hos::Version_4_0_0) \
+    AMS_SF_METHOD_INFO(C, H, 10,    Result, BoostSystemThreadResourceLimit,                  (),                                                                                  ())                                               \
+    AMS_SF_METHOD_INFO(C, H, 65000, Result, AtmosphereBoostSystemMemoryResourceLimitForMitm, (u64 boost_size),                                                                    (boost_size))
 
 AMS_SF_DEFINE_INTERFACE(ams::pm::impl, IDeprecatedShellInterface, AMS_PM_I_DEPRECATED_SHELL_INTERFACE_INTERFACE_INFO, 0x387D60C0)

libraries/libstratosphere/include/stratosphere/pm/pm_shell_api.hpp

@@ -32,4 +32,6 @@ namespace ams::pm::shell {
     Result BoostApplicationThreadResourceLimit();
     Result BoostSystemThreadResourceLimit();
 
+    Result AtmosphereBoostSystemMemoryResourceLimitForMitm(u64 size);
+
 }

libraries/libstratosphere/source/pm/pm_ams.os.horizon.c

@@ -90,3 +90,9 @@ Result pmdmntAtmosphereGetCurrentLimitInfo(u64 *out_cur, u64 *out_lim, u32 group
 
     return rc;
 }
+
+Result pmshellAtmosphereBoostSystemMemoryResourceLimitForMitm(u64 size) {
+    return serviceDispatchIn(pmshellGetServiceSession(), 65000, size);
+}
+
+

libraries/libstratosphere/source/pm/pm_ams.os.horizon.h

@@ -26,6 +26,8 @@ Result pminfoAtmosphereGetProcessInfo(NcmProgramLocation *loc_out, CfgOverrideSt
 Result pmdmntAtmosphereGetProcessInfo(Handle *out, NcmProgramLocation *loc_out, CfgOverrideStatus *status_out, u64 pid);
 Result pmdmntAtmosphereGetCurrentLimitInfo(u64 *out_cur, u64 *out_lim, u32 group, u32 resource);
 
+Result pmshellAtmosphereBoostSystemMemoryResourceLimitForMitm(u64 size);
+
 #ifdef __cplusplus
 }
 #endif

libraries/libstratosphere/source/pm/pm_shell_api.cpp

@@ -14,6 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <stratosphere.hpp>
+#include "pm_ams.os.horizon.h"
 
 namespace ams::pm::shell {
 
@@ -57,6 +58,10 @@ namespace ams::pm::shell {
     Result BoostSystemThreadResourceLimit() {
         R_RETURN(::pmshellBoostSystemThreadResourceLimit());
     }
+
+    Result AtmosphereBoostSystemMemoryResourceLimitForMitm(u64 size) {
+       R_RETURN(pmshellAtmosphereBoostSystemMemoryResourceLimitForMitm(size));
+    }
     #endif
 
 }

libraries/libvapours/include/vapours/ams/ams_api_version.h

@@ -17,10 +17,10 @@
 
 #define ATMOSPHERE_RELEASE_VERSION_MAJOR    1
 #define ATMOSPHERE_RELEASE_VERSION_MINOR    5
-#define ATMOSPHERE_RELEASE_VERSION_MICRO    2
+#define ATMOSPHERE_RELEASE_VERSION_MICRO    3
 
 #define ATMOSPHERE_RELEASE_VERSION ATMOSPHERE_RELEASE_VERSION_MAJOR, ATMOSPHERE_RELEASE_VERSION_MINOR, ATMOSPHERE_RELEASE_VERSION_MICRO
 
 #define ATMOSPHERE_SUPPORTED_HOS_VERSION_MAJOR 16
 #define ATMOSPHERE_SUPPORTED_HOS_VERSION_MINOR 0
-#define ATMOSPHERE_SUPPORTED_HOS_VERSION_MICRO 2
+#define ATMOSPHERE_SUPPORTED_HOS_VERSION_MICRO 3

libraries/libvapours/include/vapours/ams/ams_target_firmware.h

@@ -76,8 +76,9 @@
 #define ATMOSPHERE_TARGET_FIRMWARE_16_0_0 ATMOSPHERE_TARGET_FIRMWARE(16,  0,  0)
 #define ATMOSPHERE_TARGET_FIRMWARE_16_0_1 ATMOSPHERE_TARGET_FIRMWARE(16,  0,  1)
 #define ATMOSPHERE_TARGET_FIRMWARE_16_0_2 ATMOSPHERE_TARGET_FIRMWARE(16,  0,  2)
+#define ATMOSPHERE_TARGET_FIRMWARE_16_0_3 ATMOSPHERE_TARGET_FIRMWARE(16,  0,  3)
 
-#define ATMOSPHERE_TARGET_FIRMWARE_CURRENT ATMOSPHERE_TARGET_FIRMWARE_16_0_2
+#define ATMOSPHERE_TARGET_FIRMWARE_CURRENT ATMOSPHERE_TARGET_FIRMWARE_16_0_3
 
 #define ATMOSPHERE_TARGET_FIRMWARE_MIN ATMOSPHERE_TARGET_FIRMWARE(0, 0, 0)
 #define ATMOSPHERE_TARGET_FIRMWARE_MAX ATMOSPHERE_TARGET_FIRMWARE_CURRENT
@@ -146,6 +147,7 @@ namespace ams {
         TargetFirmware_16_0_0  = ATMOSPHERE_TARGET_FIRMWARE_16_0_0,
         TargetFirmware_16_0_1  = ATMOSPHERE_TARGET_FIRMWARE_16_0_1,
         TargetFirmware_16_0_2  = ATMOSPHERE_TARGET_FIRMWARE_16_0_2,
+        TargetFirmware_16_0_3  = ATMOSPHERE_TARGET_FIRMWARE_16_0_3,
 
         TargetFirmware_Current = ATMOSPHERE_TARGET_FIRMWARE_CURRENT,
 

stratosphere/ams_mitm/source/fs_mitm/fs_mitm_service.hpp

@@ -54,7 +54,8 @@ namespace ams::mitm::fs {
                 }
 
                 /* We want to mitm sdb, to support sd-romfs redirection of common system archives (like system font, etc). */
-                if (program_id == ncm::SystemProgramId::Sdb) {
+                /* NOTE: In 16.0.0+, this was moved to glue. */
+                if (program_id == ncm::SystemProgramId::Sdb || program_id == ncm::SystemProgramId::Glue) {
                     return true;
                 }
 

stratosphere/ams_mitm/source/fs_mitm/fsmitm_layered_romfs_storage.hpp

@@ -22,7 +22,7 @@ namespace ams::mitm::fs {
 
     class LayeredRomfsStorageImpl {
         private:
-            std::vector<romfs::SourceInfo> m_source_infos;
+            romfs::Builder::SourceInfoVector m_source_infos;
             std::unique_ptr<ams::fs::IStorage> m_storage_romfs;
             std::unique_ptr<ams::fs::IStorage> m_file_romfs;
             os::Event m_initialize_event;

stratosphere/ams_mitm/source/fs_mitm/fsmitm_romfs.cpp

@@ -23,6 +23,27 @@ namespace ams::mitm::fs {
 
     namespace romfs {
 
+        namespace {
+
+            /* TODO: Fancy Dynamic allocation globals. */
+
+        }
+
+        void *AllocateTracked(AllocationType type, size_t size) {
+            AMS_UNUSED(type);
+
+            /* TODO: Fancy dynamic allocation with memory stealing from application pool. */
+            return std::malloc(size);
+        }
+
+        void FreeTracked(AllocationType type, void *p, size_t size) {
+            AMS_UNUSED(type);
+            AMS_UNUSED(size);
+
+            /* TODO: Fancy dynamic allocation with memory stealing from application pool. */
+            return std::free(p);
+        }
+
         namespace {
 
             constexpr u32 EmptyEntry = 0xFFFFFFFF;
@@ -71,22 +92,23 @@ namespace ams::mitm::fs {
                     static constexpr size_t MaxCachedSize = (1_MB / 4);
                 private:
                     size_t m_cache_bitsize;
+                    size_t m_cache_size;
                 protected:
                     void *m_cache;
                 protected:
                     DynamicTableCache(size_t sz) {
-                        size_t cache_size = util::CeilingPowerOfTwo(std::min(sz, MaxCachedSize));
+                        m_cache_size = util::CeilingPowerOfTwo(std::min(sz, MaxCachedSize));
-                        m_cache = std::malloc(cache_size);
+                        m_cache = AllocateTracked(AllocationType_TableCache, m_cache_size);
                         while (m_cache == nullptr) {
-                            cache_size >>= 1;
+                            m_cache_size  >>= 1;
-                            AMS_ABORT_UNLESS(cache_size >= 16_KB);
+                            AMS_ABORT_UNLESS(m_cache_size  >= 16_KB);
-                            m_cache = std::malloc(cache_size);
+                            m_cache = AllocateTracked(AllocationType_TableCache, m_cache_size);
                         }
-                        m_cache_bitsize = util::CountTrailingZeros(cache_size);
+                        m_cache_bitsize = util::CountTrailingZeros(m_cache_size);
                     }
 
                     ~DynamicTableCache() {
-                        std::free(m_cache);
+                        FreeTracked(AllocationType_TableCache, m_cache, m_cache_size);
                     }
 
                     ALWAYS_INLINE size_t GetCacheSize() const { return static_cast<size_t>(1) << m_cache_bitsize; }
@@ -293,7 +315,7 @@ namespace ams::mitm::fs {
         }
 
         Builder::Builder(ncm::ProgramId pr_id) : m_program_id(pr_id), m_num_dirs(0), m_num_files(0), m_dir_table_size(0), m_file_table_size(0), m_dir_hash_table_size(0), m_file_hash_table_size(0), m_file_partition_size(0) {
-            auto res = m_directories.emplace(std::make_unique<BuildDirectoryContext>(BuildDirectoryContext::RootTag{}));
+            auto res = m_directories.emplace(std::unique_ptr<BuildDirectoryContext>(AllocateTyped<BuildDirectoryContext>(AllocationType_BuildDirContext, BuildDirectoryContext::RootTag{})));
             AMS_ABORT_UNLESS(res.second);
             m_root = res.first->get();
             m_num_dirs = 1;
@@ -347,9 +369,9 @@ namespace ams::mitm::fs {
             AMS_ABORT_UNLESS(num_child_dirs >= 0);
 
             {
-                BuildDirectoryContext **child_dirs = num_child_dirs != 0 ? reinterpret_cast<BuildDirectoryContext **>(std::malloc(sizeof(BuildDirectoryContext *) * num_child_dirs)) : nullptr;
+                BuildDirectoryContext **child_dirs = num_child_dirs != 0 ? reinterpret_cast<BuildDirectoryContext **>(AllocateTracked(AllocationType_DirPointerArray, sizeof(BuildDirectoryContext *) * num_child_dirs)) : nullptr;
                 AMS_ABORT_UNLESS(num_child_dirs == 0 || child_dirs != nullptr);
-                ON_SCOPE_EXIT { std::free(child_dirs); };
+                ON_SCOPE_EXIT { if (child_dirs != nullptr) { FreeTracked(AllocationType_DirPointerArray, child_dirs, sizeof(BuildDirectoryContext *) * num_child_dirs); } };
 
                 s64 cur_child_dir_ind = 0;
                 {
@@ -368,12 +390,12 @@ namespace ams::mitm::fs {
                             AMS_ABORT_UNLESS(child_dirs != nullptr);
 
                             BuildDirectoryContext *real_child = nullptr;
-                            this->AddDirectory(std::addressof(real_child), parent, std::make_unique<BuildDirectoryContext>(m_dir_entry.name, strlen(m_dir_entry.name)));
+                            this->AddDirectory(std::addressof(real_child), parent, std::unique_ptr<BuildDirectoryContext>(AllocateTyped<BuildDirectoryContext>(AllocationType_BuildDirContext, m_dir_entry.name, strlen(m_dir_entry.name))));
                             AMS_ABORT_UNLESS(real_child != nullptr);
                             child_dirs[cur_child_dir_ind++] = real_child;
                             AMS_ABORT_UNLESS(cur_child_dir_ind <= num_child_dirs);
                         } else /* if (m_dir_entry.type == FsDirEntryType_File) */ {
-                            this->AddFile(parent, std::make_unique<BuildFileContext>(m_dir_entry.name, strlen(m_dir_entry.name), m_dir_entry.file_size, 0, m_cur_source_type));
+                            this->AddFile(parent, std::unique_ptr<BuildFileContext>(AllocateTyped<BuildFileContext>(AllocationType_BuildFileContext, m_dir_entry.name, strlen(m_dir_entry.name), m_dir_entry.file_size, 0, m_cur_source_type)));
                         }
                     }
                 }
@@ -403,7 +425,7 @@ namespace ams::mitm::fs {
             while (cur_file_offset != EmptyEntry) {
                 const FileEntry *cur_file = file_table.GetEntry(cur_file_offset);
 
-                this->AddFile(parent, std::make_unique<BuildFileContext>(cur_file->name, cur_file->name_size, cur_file->size, cur_file->offset, m_cur_source_type));
+                this->AddFile(parent, std::unique_ptr<BuildFileContext>(AllocateTyped<BuildFileContext>(AllocationType_BuildFileContext, cur_file->name, cur_file->name_size, cur_file->size, cur_file->offset, m_cur_source_type)));
 
                 cur_file_offset = cur_file->sibling;
             }
@@ -415,7 +437,7 @@ namespace ams::mitm::fs {
                 {
                     const DirectoryEntry *cur_child = dir_table.GetEntry(cur_child_offset);
 
-                    this->AddDirectory(std::addressof(real_child), parent, std::make_unique<BuildDirectoryContext>(cur_child->name, cur_child->name_size));
+                    this->AddDirectory(std::addressof(real_child), parent, std::unique_ptr<BuildDirectoryContext>(AllocateTyped<BuildDirectoryContext>(AllocationType_BuildDirContext, cur_child->name, cur_child->name_size)));
                     AMS_ABORT_UNLESS(real_child != nullptr);
 
                     next_child_offset = cur_child->sibling;
@@ -438,7 +460,7 @@ namespace ams::mitm::fs {
             /* If there is no romfs folder on the SD, don't bother continuing. */
             {
                 FsDir dir;
-                if (R_FAILED(mitm::fs::OpenAtmosphereRomfsDirectory(std::addressof(dir), m_program_id, m_root->path.get(), OpenDirectoryMode_Directory, std::addressof(sd_filesystem)))) {
+                if (R_FAILED(mitm::fs::OpenAtmosphereRomfsDirectory(std::addressof(dir), m_program_id, m_root->path, OpenDirectoryMode_Directory, std::addressof(sd_filesystem)))) {
                     return;
                 }
                 fsDirClose(std::addressof(dir));
@@ -461,7 +483,7 @@ namespace ams::mitm::fs {
             this->VisitDirectory(m_root, 0x0, dir_table, file_table);
         }
 
-        void Builder::Build(std::vector<SourceInfo> *out_infos) {
+        void Builder::Build(SourceInfoVector *out_infos) {
             /* Clear output. */
             out_infos->clear();
 
@@ -477,7 +499,7 @@ namespace ams::mitm::fs {
             m_file_hash_table_size = sizeof(u32) * num_file_hash_table_entries;
 
             /* Allocate metadata, make pointers. */
-            Header *header = reinterpret_cast<Header *>(std::malloc(sizeof(Header)));
+            Header *header = reinterpret_cast<Header *>(AllocateTracked(AllocationType_Memory, sizeof(Header)));
             std::memset(header, 0x00, sizeof(*header));
 
             /* Open metadata file. */
@@ -552,13 +574,13 @@ namespace ams::mitm::fs {
             /* Set all files' hash value = hash index. */
             for (const auto &it : m_files) {
                 BuildFileContext *cur_file = it.get();
-                cur_file->hash_value = CalculatePathHash(cur_file->parent->entry_offset, cur_file->path.get(), 0, cur_file->path_len) % num_file_hash_table_entries;
+                cur_file->hash_value = CalculatePathHash(cur_file->parent->entry_offset, cur_file->path, 0, cur_file->path_len) % num_file_hash_table_entries;
             }
 
             /* Set all directories' hash value = hash index. */
             for (const auto &it : m_directories) {
                 BuildDirectoryContext *cur_dir = it.get();
-                cur_dir->hash_value = CalculatePathHash(cur_dir == m_root ? 0 : cur_dir->parent->entry_offset, cur_dir->path.get(), 0, cur_dir->path_len) % num_dir_hash_table_entries;
+                cur_dir->hash_value = CalculatePathHash(cur_dir == m_root ? 0 : cur_dir->parent->entry_offset, cur_dir->path, 0, cur_dir->path_len) % num_dir_hash_table_entries;
             }
 
             /* Write hash tables. */
@@ -661,7 +683,7 @@ namespace ams::mitm::fs {
                     const u32 name_size = cur_file->path_len;
                     cur_entry->name_size = name_size;
                     if (name_size) {
-                        std::memcpy(cur_entry->name, cur_file->path.get(), name_size);
+                        std::memcpy(cur_entry->name, cur_file->path, name_size);
                         for (size_t i = name_size; i < util::AlignUp(name_size, 4); i++) {
                             cur_entry->name[i] = 0;
                         }
@@ -688,9 +710,10 @@ namespace ams::mitm::fs {
                                 AMS_ABORT_UNLESS(path_needed_size <= sizeof(full_path));
                                 cur_file->GetPath(full_path);
 
-                                cur_file->path.reset();
+                                FreeTracked(AllocationType_FileName, cur_file->path, cur_file->path_len + 1);
+                                cur_file->path = nullptr;
 
-                                char *new_path = new char[path_needed_size];
+                                char *new_path = static_cast<char *>(AllocateTracked(AllocationType_FullPath, path_needed_size));
                                 std::memcpy(new_path, full_path, path_needed_size);
                                 out_infos->emplace_back(cur_file->offset + FilePartitionOffset, cur_file->size, cur_file->source_type, new_path);
                             }
@@ -719,7 +742,7 @@ namespace ams::mitm::fs {
                     const u32 name_size = cur_dir->path_len;
                     cur_entry->name_size = name_size;
                     if (name_size) {
-                        std::memcpy(cur_entry->name, cur_dir->path.get(), name_size);
+                        std::memcpy(cur_entry->name, cur_dir->path, name_size);
                         for (size_t i = name_size; i < util::AlignUp(name_size, 4); i++) {
                             cur_entry->name[i] = 0;
                         }

stratosphere/ams_mitm/source/fs_mitm/fsmitm_romfs.hpp

@@ -27,6 +27,52 @@ namespace ams::mitm::fs::romfs {
         Memory,
     };
 
+    enum AllocationType {
+        AllocationType_FileName,
+        AllocationType_DirName,
+        AllocationType_FullPath,
+        AllocationType_SourceInfo,
+        AllocationType_BuildFileContext,
+        AllocationType_BuildDirContext,
+        AllocationType_TableCache,
+        AllocationType_DirPointerArray,
+        AllocationType_DirContextSet,
+        AllocationType_FileContextSet,
+        AllocationType_Memory,
+
+        AllocationType_Count,
+    };
+
+    void *AllocateTracked(AllocationType type, size_t size);
+    void FreeTracked(AllocationType type, void *p, size_t size);
+
+    template<typename T, typename... Args>
+    T *AllocateTyped(AllocationType type, Args &&... args) {
+        void *mem = AllocateTracked(type, sizeof(T));
+        return std::construct_at(static_cast<T *>(mem), std::forward<Args>(args)...);
+    }
+
+    template<AllocationType AllocType, typename T>
+    class TrackedAllocator {
+        public:
+            using value_type = T;
+
+            template<typename U>
+            struct rebind {
+                using other = TrackedAllocator<AllocType, U>;
+            };
+        public:
+            TrackedAllocator() = default;
+
+            T *allocate(size_t n) {
+                return static_cast<T *>(AllocateTracked(AllocType, sizeof(T) * n));
+            }
+
+            void deallocate(T *p, size_t n) {
+                FreeTracked(AllocType, p, sizeof(T) * n);
+            }
+    };
+
     struct SourceInfo {
         s64 virtual_offset;
         s64 size;
@@ -89,10 +135,10 @@ namespace ams::mitm::fs::romfs {
                     delete this->metadata_source_info.file;
                     break;
                 case DataSourceType::LooseSdFile:
-                    delete[] this->loose_source_info.path;
+                    FreeTracked(AllocationType_FullPath, this->loose_source_info.path, std::strlen(this->loose_source_info.path) + 1);
                     break;
                 case DataSourceType::Memory:
-                    std::free(static_cast<void *>(this->memory_source_info.data));
+                    FreeTracked(AllocationType_Memory, this->memory_source_info.data, this->size);
                     break;
                 AMS_UNREACHABLE_DEFAULT_CASE();
             }
@@ -113,7 +159,7 @@ namespace ams::mitm::fs::romfs {
         NON_COPYABLE(BuildDirectoryContext);
         NON_MOVEABLE(BuildDirectoryContext);
 
-        std::unique_ptr<char[]> path;
+        char *path;
         union {
             BuildDirectoryContext *parent;
         };
@@ -139,16 +185,28 @@ namespace ams::mitm::fs::romfs {
         struct RootTag{};
 
         BuildDirectoryContext(RootTag) : parent(nullptr), child(nullptr), sibling(nullptr), file(nullptr), path_len(0), entry_offset(0), hash_value(0xFFFFFFFF) {
-            this->path = std::make_unique<char[]>(1);
+            this->path = static_cast<char *>(AllocateTracked(AllocationType_DirName, 1));
+            this->path[0] = '\x00';
         }
 
         BuildDirectoryContext(const char *entry_name, size_t entry_name_len) : parent(nullptr), child(nullptr), sibling(nullptr), file(nullptr), entry_offset(0) {
             this->path_len = entry_name_len;
-            this->path = std::unique_ptr<char[]>(new char[this->path_len + 1]);
+            this->path = static_cast<char *>(AllocateTracked(AllocationType_DirName, this->path_len + 1));
-            std::memcpy(this->path.get(), entry_name, entry_name_len);
+            std::memcpy(this->path, entry_name, entry_name_len);
             this->path[this->path_len] = '\x00';
         }
 
+        ~BuildDirectoryContext() {
+            if (this->path != nullptr) {
+                FreeTracked(AllocationType_DirName, this->path, this->path_len + 1);
+                this->path = nullptr;
+            }
+        }
+
+        void operator delete(void *p) {
+            FreeTracked(AllocationType_BuildDirContext, p, sizeof(BuildDirectoryContext));
+        }
+
         size_t GetPathLength() const {
             if (this->parent == nullptr) {
                 return 0;
@@ -165,7 +223,7 @@ namespace ams::mitm::fs::romfs {
 
             const size_t parent_len = this->parent->GetPath(dst);
             dst[parent_len] = '/';
-            std::memcpy(dst + parent_len + 1, this->path.get(), this->path_len);
+            std::memcpy(dst + parent_len + 1, this->path, this->path_len);
             dst[parent_len + 1 + this->path_len] = '\x00';
             return parent_len + 1 + this->path_len;
         }
@@ -187,7 +245,7 @@ namespace ams::mitm::fs::romfs {
         NON_COPYABLE(BuildFileContext);
         NON_MOVEABLE(BuildFileContext);
 
-        std::unique_ptr<char[]> path;
+        char *path;
         BuildDirectoryContext *parent;
         union {
             BuildFileContext *sibling;
@@ -203,11 +261,22 @@ namespace ams::mitm::fs::romfs {
 
         BuildFileContext(const char *entry_name, size_t entry_name_len, s64 sz, s64 o_o, DataSourceType type) : parent(nullptr), sibling(nullptr), offset(0), size(sz), orig_offset(o_o), entry_offset(0), hash_value(0xFFFFFFFF), source_type(type) {
             this->path_len = entry_name_len;
-            this->path = std::unique_ptr<char[]>(new char[this->path_len + 1]);
+            this->path = static_cast<char *>(AllocateTracked(AllocationType_FileName, this->path_len + 1));
-            std::memcpy(this->path.get(), entry_name, entry_name_len);
+            std::memcpy(this->path, entry_name, entry_name_len);
             this->path[this->path_len] = 0;
         }
 
+        ~BuildFileContext() {
+            if (this->path != nullptr) {
+                FreeTracked(AllocationType_FileName, this->path, this->path_len + 1);
+                this->path = nullptr;
+            }
+        }
+
+        void operator delete(void *p) {
+            FreeTracked(AllocationType_BuildFileContext, p, sizeof(BuildFileContext));
+        }
+
         size_t GetPathLength() const {
             if (this->parent == nullptr) {
                 return 0;
@@ -224,7 +293,7 @@ namespace ams::mitm::fs::romfs {
 
             const size_t parent_len = this->parent->GetPath(dst);
             dst[parent_len] = '/';
-            std::memcpy(dst + parent_len + 1, this->path.get(), this->path_len);
+            std::memcpy(dst + parent_len + 1, this->path, this->path_len);
             dst[parent_len + 1 + this->path_len] = '\x00';
             return parent_len + 1 + this->path_len;
         }
@@ -248,6 +317,8 @@ namespace ams::mitm::fs::romfs {
     class Builder {
         NON_COPYABLE(Builder);
         NON_MOVEABLE(Builder);
+        public:
+            using SourceInfoVector = std::vector<SourceInfo, TrackedAllocator<AllocationType_SourceInfo, SourceInfo>>;
         private:
             template<typename T>
             struct Comparator {
@@ -270,13 +341,13 @@ namespace ams::mitm::fs::romfs {
                 }
             };
 
-            template<typename T>
+            template<AllocationType AllocType, typename T>
-            using ContextSet = std::set<std::unique_ptr<T>, Comparator<T>>;
+            using ContextSet = std::set<std::unique_ptr<T>, Comparator<T>, TrackedAllocator<AllocType, std::unique_ptr<T>>>;
         private:
             ncm::ProgramId m_program_id;
             BuildDirectoryContext *m_root;
-            ContextSet<BuildDirectoryContext> m_directories;
+            ContextSet<AllocationType_DirContextSet, BuildDirectoryContext> m_directories;
-            ContextSet<BuildFileContext> m_files;
+            ContextSet<AllocationType_FileContextSet, BuildFileContext> m_files;
             size_t m_num_dirs;
             size_t m_num_files;
             size_t m_dir_table_size;
@@ -299,7 +370,7 @@ namespace ams::mitm::fs::romfs {
             void AddSdFiles();
             void AddStorageFiles(ams::fs::IStorage *storage, DataSourceType source_type);
 
-            void Build(std::vector<SourceInfo> *out_infos);
+            void Build(SourceInfoVector *out_infos);
     };
 
 }

stratosphere/pm/source/impl/pm_process_manager.cpp

@@ -713,4 +713,8 @@ namespace ams::pm::impl {
         R_RETURN(resource::GetResourceLimitValues(out_cur_val, out_lim_val, static_cast<ResourceLimitGroup>(group), static_cast<svc::LimitableResource>(resource)));
     }
 
+    Result BoostSystemMemoryResourceLimitForMitm(u64 boost_size) {
+        R_RETURN(resource::BoostSystemMemoryResourceLimitForMitm(boost_size));
+    }
+
 }

stratosphere/pm/source/impl/pm_process_manager.hpp

@@ -55,5 +55,6 @@ namespace ams::pm::impl {
     Result GetAppletCurrentResourceLimitValues(pm::ResourceLimitValues *out);
     Result GetAppletPeakResourceLimitValues(pm::ResourceLimitValues *out);
     Result AtmosphereGetCurrentLimitInfo(s64 *out_cur_val, s64 *out_lim_val, u32 group, u32 resource);
+    Result BoostSystemMemoryResourceLimitForMitm(u64 boost_size);
 
 }

stratosphere/pm/source/impl/pm_resource_manager.cpp

@@ -52,9 +52,16 @@ namespace ams::pm::resource {
         constinit os::SdkMutex g_resource_limit_lock;
         constinit os::NativeHandle g_resource_limit_handles[ResourceLimitGroup_Count];
         constinit spl::MemoryArrangement g_memory_arrangement = spl::MemoryArrangement_Standard;
-        constinit u64 g_system_memory_boost_size = 0;
         constinit u64 g_extra_threads_available[ResourceLimitGroup_Count];
 
+        constinit os::SdkMutex g_system_memory_boost_lock;
+        constinit u64 g_system_memory_boost_size          = 0;
+        constinit u64 g_system_memory_boost_size_for_mitm = 0;
+
+        ALWAYS_INLINE u64 GetCurrentSystemMemoryBoostSize() {
+            return g_system_memory_boost_size + g_system_memory_boost_size_for_mitm;
+        }
+
         constinit u64 g_resource_limits[ResourceLimitGroup_Count][svc::LimitableResource_Count] = {
             [ResourceLimitGroup_System] = {
                 [svc::LimitableResource_PhysicalMemoryMax]      = 0,   /* Initialized dynamically later. */
@@ -220,6 +227,47 @@ namespace ams::pm::resource {
             R_SUCCEED();
         }
 
+        Result BoostSystemMemoryResourceLimitLocked(u64 normal_boost, u64 mitm_boost) {
+            /* Check pre-conditions. */
+            AMS_ASSERT(g_system_memory_boost_lock.IsLockedByCurrentThread());
+
+            /* Determine total boost. */
+            const u64 boost_size = normal_boost + mitm_boost;
+
+            /* Don't allow all application memory to be taken away. */
+            R_UNLESS(boost_size <= g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application], pm::ResultInvalidSize());
+
+            const u64 new_app_size = g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application] - boost_size;
+            {
+                std::scoped_lock lk(g_resource_limit_lock);
+
+                if (hos::GetVersion() >= hos::Version_5_0_0) {
+                    /* Starting in 5.0.0, PM does not allow for only one of the sets to fail. */
+                    if (boost_size < GetCurrentSystemMemoryBoostSize()) {
+                        R_TRY(svc::SetUnsafeLimit(boost_size));
+                        R_ABORT_UNLESS(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
+                    } else {
+                        R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
+                        R_ABORT_UNLESS(svc::SetUnsafeLimit(boost_size));
+                    }
+                } else {
+                    const u64 new_sys_size = g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_System] + boost_size;
+                    if (boost_size < GetCurrentSystemMemoryBoostSize()) {
+                        R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System,      new_sys_size));
+                        R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
+                    } else {
+                        R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
+                        R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System,      new_sys_size));
+                    }
+                }
+
+                g_system_memory_boost_size         = normal_boost;
+                g_system_memory_boost_size_for_mitm = mitm_boost;
+            }
+
+            R_SUCCEED();
+        }
+
     }
 
     /* Resource API. */
@@ -352,37 +400,19 @@ namespace ams::pm::resource {
     }
 
     Result BoostSystemMemoryResourceLimit(u64 boost_size) {
-        /* Don't allow all application memory to be taken away. */
+        /* Ensure only one boost change happens at a time. */
-        R_UNLESS(boost_size <= g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application], pm::ResultInvalidSize());
+        std::scoped_lock lk(g_system_memory_boost_lock);
 
-        const u64 new_app_size = g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_Application] - boost_size;
+        /* Boost to the appropriate total amount. */
-        {
+        R_RETURN(BoostSystemMemoryResourceLimitLocked(boost_size, g_system_memory_boost_size_for_mitm));
-            std::scoped_lock lk(g_resource_limit_lock);
-
-            if (hos::GetVersion() >= hos::Version_5_0_0) {
-                /* Starting in 5.0.0, PM does not allow for only one of the sets to fail. */
-                if (boost_size < g_system_memory_boost_size) {
-                    R_TRY(svc::SetUnsafeLimit(boost_size));
-                    R_ABORT_UNLESS(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
-                } else {
-                    R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
-                    R_ABORT_UNLESS(svc::SetUnsafeLimit(boost_size));
-                }
-            } else {
-                const u64 new_sys_size = g_memory_resource_limits[g_memory_arrangement][ResourceLimitGroup_System] + boost_size;
-                if (boost_size < g_system_memory_boost_size) {
-                    R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System,      new_sys_size));
-                    R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
-                } else {
-                    R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_Application, new_app_size));
-                    R_TRY(SetMemoryResourceLimitLimitValue(ResourceLimitGroup_System,      new_sys_size));
-                }
     }
 
-            g_system_memory_boost_size = boost_size;
+    Result BoostSystemMemoryResourceLimitForMitm(u64 boost_size) {
-        }
+        /* Ensure only one boost change happens at a time. */
+        std::scoped_lock lk(g_system_memory_boost_lock);
 
-        R_SUCCEED();
+        /* Boost to the appropriate total amount. */
+        R_RETURN(BoostSystemMemoryResourceLimitLocked(g_system_memory_boost_size, boost_size));
     }
 
     Result BoostApplicationThreadResourceLimit() {

stratosphere/pm/source/impl/pm_resource_manager.hpp

@@ -24,6 +24,8 @@ namespace ams::pm::resource {
     Result BoostApplicationThreadResourceLimit();
     Result BoostSystemThreadResourceLimit();
 
+    Result BoostSystemMemoryResourceLimitForMitm(u64 boost_size);
+
     os::NativeHandle GetResourceLimitHandle(ResourceLimitGroup group);
     os::NativeHandle GetResourceLimitHandle(const ldr::ProgramInfo *info);
 

stratosphere/pm/source/pm_shell_service.cpp

@@ -87,4 +87,8 @@ namespace ams::pm {
         R_RETURN(impl::BoostSystemThreadResourceLimit());
     }
 
+    Result ShellService::AtmosphereBoostSystemMemoryResourceLimitForMitm(u64 boost_size) {
+        R_RETURN(impl::BoostSystemMemoryResourceLimitForMitm(boost_size));
+    }
+
 }

stratosphere/pm/source/pm_shell_service.hpp

@@ -34,6 +34,9 @@ namespace ams::pm {
             Result BoostApplicationThreadResourceLimit();
             void   GetBootFinishedEventHandle(sf::OutCopyHandle out);
             Result BoostSystemThreadResourceLimit();
+
+            /* Atmosphere extension command implementations. */
+            Result AtmosphereBoostSystemMemoryResourceLimitForMitm(u64 boost_size);
     };
     static_assert(pm::impl::IsIShellInterface<ShellService>);