kern: begin 1.0.0 backwards compat changes (kips run, full boot fails)

libraries/libmesosphere/include/mesosphere/board/nintendo/nx/kern_k_system_control.hpp

@@ -39,7 +39,7 @@ namespace ams::kern::board::nintendo::nx {
             /* Initialization. */
             static NOINLINE void InitializePhase1();
             static NOINLINE void InitializePhase2();
-            static NOINLINE u32 GetInitialProcessBinaryPool();
+            static NOINLINE u32 GetCreateProcessMemoryPool();
 
             /* Randomness. */
             static void GenerateRandomBytes(void *dst, size_t size);

libraries/libmesosphere/source/board/nintendo/nx/kern_k_system_control.cpp

@@ -485,7 +485,7 @@ namespace ams::kern::board::nintendo::nx {
         }
     }
 
-    u32 KSystemControl::GetInitialProcessBinaryPool() {
+    u32 KSystemControl::GetCreateProcessMemoryPool() {
         return KMemoryManager::Pool_Unsafe;
     }
 

libraries/libmesosphere/source/kern_initial_process.cpp

@@ -66,6 +66,10 @@ namespace ams::kern {
             u8 *current = GetPointer<u8>(binary_address + sizeof(InitialProcessBinaryHeader));
             const u8 * const end = GetPointer<u8>(binary_address + header.size - sizeof(KInitialProcessHeader));
 
+            /* Decide on pools to use. */
+            const auto unsafe_pool = static_cast<KMemoryManager::Pool>(KSystemControl::GetCreateProcessMemoryPool());
+            const auto secure_pool = (GetTargetFirmware() >= TargetFirmware_2_0_0) ? KMemoryManager::Pool_Secure : unsafe_pool;
+
             const size_t num_processes = header.num_processes;
             for (size_t i = 0; i < num_processes; i++) {
                 /* Validate that we can read the current KIP. */
@@ -86,7 +90,7 @@ namespace ams::kern {
 
                     /* Allocate memory for the process. */
                     auto &mm = Kernel::GetMemoryManager();
-                    const auto pool = reader.UsesSecureMemory() ? KMemoryManager::Pool_System : static_cast<KMemoryManager::Pool>(KSystemControl::GetInitialProcessBinaryPool());
+                    const auto pool = reader.UsesSecureMemory() ? secure_pool : unsafe_pool;
                     MESOSPHERE_R_ABORT_UNLESS(mm.Allocate(std::addressof(pg), params.code_num_pages, KMemoryManager::EncodeOption(pool, KMemoryManager::Direction_FromFront)));
 
                     {
@@ -164,7 +168,7 @@ namespace ams::kern {
             MESOSPHERE_ABORT_UNLESS(Kernel::GetSystemResourceLimit().Reserve(ams::svc::LimitableResource_PhysicalMemoryMax, total_size));
 
             /* Allocate memory for the image. */
-            const KMemoryManager::Pool pool = static_cast<KMemoryManager::Pool>(KSystemControl::GetInitialProcessBinaryPool());
+            const KMemoryManager::Pool pool = static_cast<KMemoryManager::Pool>(KSystemControl::GetCreateProcessMemoryPool());
             const auto allocate_option = KMemoryManager::EncodeOption(pool, KMemoryManager::Direction_FromFront);
             KVirtualAddress allocated_memory = mm.AllocateContinuous(num_pages, 1, allocate_option);
             MESOSPHERE_ABORT_UNLESS(allocated_memory != Null<KVirtualAddress>);

libraries/libmesosphere/source/kern_k_initial_process_reader.cpp

@@ -105,8 +105,8 @@ namespace ams::kern {
 
         const uintptr_t start_address = rx_address;
         const uintptr_t end_address   = bss_size > 0 ? bss_address + bss_size : rw_address + rw_size;
-        const size_t    as_width      = this->Is64BitAddressSpace() ? 39 : 32;
+        const size_t    as_width      = this->Is64BitAddressSpace() ? ((GetTargetFirmware() >= TargetFirmware_2_0_0) ? 39 : 36) : 32;
-        const ASType    as_type       = this->Is64BitAddressSpace() ? KAddressSpaceInfo::Type_Map39Bit : KAddressSpaceInfo::Type_MapSmall;
+        const ASType    as_type       = this->Is64BitAddressSpace() ? ((GetTargetFirmware() >= TargetFirmware_2_0_0) ? KAddressSpaceInfo::Type_Map39Bit : KAddressSpaceInfo::Type_MapSmall) : KAddressSpaceInfo::Type_MapSmall;
         const uintptr_t map_start     = KAddressSpaceInfo::GetAddressSpaceStart(as_width, as_type);
         const size_t    map_size      = KAddressSpaceInfo::GetAddressSpaceSize(as_width, as_type);
         const uintptr_t map_end       = map_start + map_size;
@@ -135,7 +135,7 @@ namespace ams::kern {
             out->flags |= ams::svc::CreateProcessFlag_Is64Bit;
         }
         if (this->Is64BitAddressSpace()) {
-            out->flags |= ams::svc::CreateProcessFlag_AddressSpace64Bit;
+            out->flags |= (GetTargetFirmware() >= TargetFirmware_2_0_0) ? ams::svc::CreateProcessFlag_AddressSpace64Bit : ams::svc::CreateProcessFlag_AddressSpace64BitDeprecated;
         } else {
             out->flags |= ams::svc::CreateProcessFlag_AddressSpace32Bit;
         }

libraries/libmesosphere/source/kern_k_memory_layout.board.nintendo_nx.cpp

@@ -151,7 +151,7 @@ namespace ams::kern {
                 /* Insert the system pool. */
                 const uintptr_t system_pool_size = pool_management_start - pool_partitions_start;
                 InsertPoolPartitionRegionIntoBothTrees(pool_partitions_start, system_pool_size, KMemoryRegionType_DramSystemPool, KMemoryRegionType_VirtualDramSystemPool, cur_pool_attr);
-            } else if (GetTargetFirmware() >= TargetFirmware_2_0_0) {
+            } else {
                 /* On < 5.0.0, setup a legacy 2-pool layout for backwards compatibility. */
 
                 static_assert(KMemoryManager::Pool_Count == 4);
@@ -159,12 +159,33 @@ namespace ams::kern {
                 static_assert(KMemoryManager::Pool_Secure == KMemoryManager::Pool_System);
 
                 /* Get Secure pool size. */
-                constexpr size_t LegacySecureKernelSize = 6_MB;          /* KPageBuffer pages, other small kernel allocations. */
+                const size_t secure_pool_size = [] ALWAYS_INLINE_LAMBDA (auto target_firmware) -> size_t {
+                    constexpr size_t LegacySecureKernelSize = 8_MB;          /* KPageBuffer pages, other small kernel allocations. */
                     constexpr size_t LegacySecureMiscSize   = 1_MB;          /* Miscellaneous pages for secure process mapping. */
                     constexpr size_t LegacySecureHeapSize   = 24_MB;         /* Heap pages for secure process mapping (fs). */
                     constexpr size_t LegacySecureEsSize     = 1_MB + 232_KB; /* Size for additional secure process (es, 4.0.0+). */
 
-                const size_t secure_pool_size = GetInitialProcessesSecureMemorySize() + LegacySecureKernelSize + LegacySecureHeapSize + LegacySecureMiscSize + (GetTargetFirmware() >= TargetFirmware_4_0_0 ? LegacySecureEsSize : 0);
+                    /* The baseline size for the secure region is enough to cover any allocations the kernel might make. */
+                    size_t size = LegacySecureKernelSize;
+
+                    /* If on 2.0.0+, initial processes will fall within the secure region. */
+                    if (target_firmware >= TargetFirmware_2_0_0) {
+                        /* Account for memory used directly for the processes. */
+                        size += GetInitialProcessesSecureMemorySize();
+
+                        /* Account for heap and transient memory used by the processes. */
+                        size += LegacySecureHeapSize + LegacySecureMiscSize;
+                    }
+
+                    /* If on 4.0.0+, any process may use secure memory via a create process flag. */
+                    /* In process this is used for es alone, and the secure pool's size should be */
+                    /* increased to accommodate es's binary. */
+                    if (target_firmware >= TargetFirmware_4_0_0) {
+                        size += LegacySecureEsSize;
+                    }
+
+                    return size;
+                }(GetTargetFirmware());
 
                 /* Calculate the overhead for the secure and (defunct) applet/non-secure-system pools. */
                 size_t total_overhead_size = KMemoryManager::CalculateManagementOverheadSize(secure_pool_size);
@@ -208,9 +229,6 @@ namespace ams::kern {
 
                 u32 pool_management_attr = 0;
                 InsertPoolPartitionRegionIntoBothTrees(pool_management_start, pool_management_size, KMemoryRegionType_DramPoolManagement, KMemoryRegionType_VirtualDramPoolManagement, pool_management_attr);
-            } else {
-                /* TODO: 1.0.0 single-pool layout. */
-                MESOSPHERE_UNIMPLEMENTED();
             }
         }
 

libraries/libmesosphere/source/svc/kern_svc_process.cpp

@@ -219,14 +219,13 @@ namespace ams::kern::svc {
                     if ((flags & ams::svc::CreateProcessFlag_DeprecatedUseSecureMemory) != 0) {
                         return KMemoryManager::Pool_Secure;
                     } else {
-                        return KMemoryManager::Pool_Unsafe;
+                        return static_cast<KMemoryManager::Pool>(KSystemControl::GetCreateProcessMemoryPool());
                     }
                 } else {
-                    return KMemoryManager::Pool_Unsafe;
+                    return static_cast<KMemoryManager::Pool>(KSystemControl::GetCreateProcessMemoryPool());
                 }
             }(params.flags);
 
-
             /* Initialize the process. */
             R_TRY(process->Initialize(params, user_caps, num_caps, process_resource_limit, pool));