Use uintptr_t instead of u32 when storing pointers as integers

uintptr_t is 32-bit or 64-bit depending on the target platform.
This will help us write pointer size agnostic code so that when the day
comes that we want to do a 64-bit port, we'll be in better shape.

14 files changed, 110 insertions, 110 deletions

diff --git a/Kernel/ACPI/ACPIStaticParser.cpp b/Kernel/ACPI/ACPIStaticParser.cpp
index 7a02af1f61..064fcaa8f9 100644
--- a/Kernel/ACPI/ACPIStaticParser.cpp
+++ b/Kernel/ACPI/ACPIStaticParser.cpp
@@ -63,8 +63,8 @@ ACPI_RAW::SDTHeader* ACPIStaticParser::find_table(const char* sig)
     dbgprintf("ACPI: Calling Find Table method!\n");
 #endif
     for (auto* physical_sdt_ptr : m_main_sdt->get_sdt_pointers()) {
-        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)physical_sdt_ptr)), (PAGE_SIZE * 2), "ACPI Static Parser Tables Finding", Region::Access::Read);
-        ACPI_RAW::SDTHeader* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((u32)physical_sdt_ptr)).as_ptr();
+        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)physical_sdt_ptr)), (PAGE_SIZE * 2), "ACPI Static Parser Tables Finding", Region::Access::Read);
+        ACPI_RAW::SDTHeader* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((uintptr_t)physical_sdt_ptr)).as_ptr();
 #ifdef ACPI_DEBUG
         dbgprintf("ACPI: Examining Table @ P 0x%x\n", physical_sdt_ptr);
 #endif
@@ -85,20 +85,20 @@ void ACPIStaticParser::init_fadt()
     ASSERT(find_table("FACP") != nullptr);
     auto* fadt_ptr = find_table("FACP");
 
-    auto checkup_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)(fadt_ptr))), (PAGE_SIZE * 2), "ACPI Static Parser", Region::Access::Read);
+    auto checkup_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)(fadt_ptr))), (PAGE_SIZE * 2), "ACPI Static Parser", Region::Access::Read);
 #ifdef ACPI_DEBUG
     dbgprintf("ACPI: Checking FADT Length to choose the correct mapping size\n");
 #endif
 
-    ACPI_RAW::SDTHeader* sdt = (ACPI_RAW::SDTHeader*)checkup_region->vaddr().offset(offset_in_page((u32)(fadt_ptr))).as_ptr();
+    ACPI_RAW::SDTHeader* sdt = (ACPI_RAW::SDTHeader*)checkup_region->vaddr().offset(offset_in_page((uintptr_t)(fadt_ptr))).as_ptr();
 #ifdef ACPI_DEBUG
     dbgprintf("ACPI: FADT @ V 0x%x, P 0x%x\n", sdt, fadt_ptr);
 #endif
     u32 length = sdt->length;
     kprintf("ACPI: Fixed ACPI data, Revision %u\n", sdt->revision);
 
-    auto fadt_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)(fadt_ptr))), PAGE_ROUND_UP(length) + PAGE_SIZE, "ACPI Static Parser", Region::Access::Read);
-    m_fadt = make<ACPI::FixedACPIData>(*(ACPI_RAW::FADT*)fadt_region->vaddr().offset(offset_in_page((u32)(fadt_ptr))).as_ptr());
+    auto fadt_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)(fadt_ptr))), PAGE_ROUND_UP(length) + PAGE_SIZE, "ACPI Static Parser", Region::Access::Read);
+    m_fadt = make<ACPI::FixedACPIData>(*(ACPI_RAW::FADT*)fadt_region->vaddr().offset(offset_in_page((uintptr_t)(fadt_ptr))).as_ptr());
 #ifdef ACPI_DEBUG
     dbgprintf("ACPI: Finished to initialize Fixed ACPI data\n");
 #endif
@@ -143,8 +143,8 @@ size_t ACPIStaticParser::get_table_size(ACPI_RAW::SDTHeader& p_header)
 #ifdef ACPI_DEBUG
     dbgprintf("ACPI: Checking SDT Length\n");
 #endif
-    auto region = MM.allocate_kernel_region(PhysicalAddress((u32)&p_header & PAGE_MASK), (PAGE_SIZE * 2), "ACPI get_table_size()", Region::Access::Read);
-    volatile auto* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((u32)&p_header)).as_ptr();
+    auto region = MM.allocate_kernel_region(PhysicalAddress((uintptr_t)&p_header & PAGE_MASK), (PAGE_SIZE * 2), "ACPI get_table_size()", Region::Access::Read);
+    volatile auto* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((uintptr_t)&p_header)).as_ptr();
     return sdt->length;
 }
 
@@ -154,8 +154,8 @@ u8 ACPIStaticParser::get_table_revision(ACPI_RAW::SDTHeader& p_header)
 #ifdef ACPI_DEBUG
     dbgprintf("ACPI: Checking SDT Revision\n");
 #endif
-    auto region = MM.allocate_kernel_region(PhysicalAddress((u32)&p_header & PAGE_MASK), (PAGE_SIZE * 2), "ACPI get_table_revision()", Region::Access::Read);
-    volatile auto* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((u32)&p_header)).as_ptr();
+    auto region = MM.allocate_kernel_region(PhysicalAddress((uintptr_t)&p_header & PAGE_MASK), (PAGE_SIZE * 2), "ACPI get_table_revision()", Region::Access::Read);
+    volatile auto* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((uintptr_t)&p_header)).as_ptr();
     return sdt->revision;
 }
 
@@ -175,8 +175,8 @@ void ACPIStaticParser::initialize_main_system_description_table()
         revision = get_table_revision(*m_main_system_description_table);
     }
 
-    auto main_sdt_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)m_main_system_description_table)), PAGE_ROUND_UP(length) + PAGE_SIZE, "ACPI Static Parser Initialization", Region::Access::Read, false, true);
-    volatile auto* sdt = (ACPI_RAW::SDTHeader*)main_sdt_region->vaddr().offset(offset_in_page((u32)m_main_system_description_table)).as_ptr();
+    auto main_sdt_region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)m_main_system_description_table)), PAGE_ROUND_UP(length) + PAGE_SIZE, "ACPI Static Parser Initialization", Region::Access::Read, false, true);
+    volatile auto* sdt = (ACPI_RAW::SDTHeader*)main_sdt_region->vaddr().offset(offset_in_page((uintptr_t)m_main_system_description_table)).as_ptr();
     kprintf("ACPI: Main Description Table valid? 0x%x\n", validate_acpi_table(const_cast<ACPI_RAW::SDTHeader&>(*sdt), length));
 
     Vector<ACPI_RAW::SDTHeader*> sdt_pointers;
@@ -236,8 +236,8 @@ void ACPIStaticParser::locate_all_aml_tables()
     kprintf("ACPI: Searching for AML Tables\n");
     m_aml_tables_ptrs.append(m_fadt->get_dsdt());
     for (auto* sdt_ptr : m_main_sdt->get_sdt_pointers()) {
-        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)sdt_ptr)), (PAGE_SIZE * 2), "ACPI Static Parser AML Tables Finding", Region::Access::Read);
-        auto* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((u32)sdt_ptr)).as_ptr();
+        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)sdt_ptr)), (PAGE_SIZE * 2), "ACPI Static Parser AML Tables Finding", Region::Access::Read);
+        auto* sdt = (ACPI_RAW::SDTHeader*)region->vaddr().offset(offset_in_page((uintptr_t)sdt_ptr)).as_ptr();
 #ifdef ACPI_DEBUG
         dbgprintf("ACPI: Examining Table @ P 0x%x\n", sdt_ptr);
 #endif
@@ -387,7 +387,7 @@ ACPI::FixedACPIData::FixedACPIData(ACPI_RAW::FADT& fadt)
 
 ACPI_RAW::SDTHeader* ACPI::FixedACPIData::get_dsdt()
 {
-    if (m_x_dsdt_ptr != (u32) nullptr)
+    if (m_x_dsdt_ptr != (uintptr_t) nullptr)
         return (ACPI_RAW::SDTHeader*)m_x_dsdt_ptr;
     else {
         ASSERT((ACPI_RAW::SDTHeader*)m_dsdt_ptr != nullptr);
diff --git a/Kernel/ACPI/DMIDecoder.cpp b/Kernel/ACPI/DMIDecoder.cpp
index ead18076af..b01bbb2748 100644
--- a/Kernel/ACPI/DMIDecoder.cpp
+++ b/Kernel/ACPI/DMIDecoder.cpp
@@ -90,10 +90,10 @@ void DMIDecoder::enumerate_smbios_tables()
     u32 table_length = m_table_length;
     SMBIOS::TableHeader* p_table_ptr = m_structure_table;
 
-    PhysicalAddress paddr = PhysicalAddress(page_base_of((u32)p_table_ptr));
+    PhysicalAddress paddr = PhysicalAddress(page_base_of((uintptr_t)p_table_ptr));
     auto region = MM.allocate_kernel_region(paddr, PAGE_ROUND_UP(table_length), "DMI Decoder Enumerating SMBIOS", Region::Access::Read, false, false);
 
-    volatile SMBIOS::TableHeader* v_table_ptr = (SMBIOS::TableHeader*)region->vaddr().offset(offset_in_page((u32)p_table_ptr)).as_ptr();
+    volatile SMBIOS::TableHeader* v_table_ptr = (SMBIOS::TableHeader*)region->vaddr().offset(offset_in_page((uintptr_t)p_table_ptr)).as_ptr();
 #ifdef SMBIOS_DEBUG
     dbgprintf("DMIDecoder: Total Table length %d\n", m_table_length);
 #endif
@@ -104,7 +104,7 @@ void DMIDecoder::enumerate_smbios_tables()
         dbgprintf("DMIDecoder: Examining table @ P 0x%x V 0x%x\n", p_table_ptr, v_table_ptr);
 #endif
         structures_count++;
-        if (v_table_ptr->type == (u32)SMBIOS::TableType::EndOfTable) {
+        if (v_table_ptr->type == (u8)SMBIOS::TableType::EndOfTable) {
             kprintf("DMIDecoder: Detected table with type 127, End of SMBIOS data.\n");
             break;
         }
@@ -113,8 +113,8 @@ void DMIDecoder::enumerate_smbios_tables()
         table_length -= v_table_ptr->length;
 
         size_t table_size = get_table_size(*p_table_ptr);
-        p_table_ptr = (SMBIOS::TableHeader*)((u32)p_table_ptr + (u32)table_size);
-        v_table_ptr = (SMBIOS::TableHeader*)((u32)v_table_ptr + (u32)table_size);
+        p_table_ptr = (SMBIOS::TableHeader*)((uintptr_t)p_table_ptr + table_size);
+        v_table_ptr = (SMBIOS::TableHeader*)((uintptr_t)v_table_ptr + table_size);
 #ifdef SMBIOS_DEBUG
         dbgprintf("DMIDecoder: Next table @ P 0x%x\n", p_table_ptr);
 #endif
@@ -146,7 +146,7 @@ size_t DMIDecoder::get_table_size(SMBIOS::TableHeader& table)
 
 SMBIOS::TableHeader* DMIDecoder::get_next_physical_table(SMBIOS::TableHeader& p_table)
 {
-    return (SMBIOS::TableHeader*)((u32)&p_table + get_table_size(p_table));
+    return (SMBIOS::TableHeader*)((uintptr_t)&p_table + get_table_size(p_table));
 }
 
 SMBIOS::TableHeader* DMIDecoder::get_smbios_physical_table_by_handle(u16 handle)
@@ -155,8 +155,8 @@ SMBIOS::TableHeader* DMIDecoder::get_smbios_physical_table_by_handle(u16 handle)
     for (auto* table : m_smbios_tables) {
         if (!table)
             continue;
-        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)table)), PAGE_SIZE * 2, "DMI Decoder Finding Table", Region::Access::Read, false, false);
-        SMBIOS::TableHeader* table_v_ptr = (SMBIOS::TableHeader*)region->vaddr().offset(offset_in_page((u32)table)).as_ptr();
+        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)table)), PAGE_SIZE * 2, "DMI Decoder Finding Table", Region::Access::Read, false, false);
+        SMBIOS::TableHeader* table_v_ptr = (SMBIOS::TableHeader*)region->vaddr().offset(offset_in_page((uintptr_t)table)).as_ptr();
 
         if (table_v_ptr->handle == handle) {
             return table;
@@ -170,8 +170,8 @@ SMBIOS::TableHeader* DMIDecoder::get_smbios_physical_table_by_type(u8 table_type
     for (auto* table : m_smbios_tables) {
         if (!table)
             continue;
-        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((u32)table)), PAGE_ROUND_UP(PAGE_SIZE * 2), "DMI Decoder Finding Table", Region::Access::Read, false, false);
-        SMBIOS::TableHeader* table_v_ptr = (SMBIOS::TableHeader*)region->vaddr().offset(offset_in_page((u32)table)).as_ptr();
+        auto region = MM.allocate_kernel_region(PhysicalAddress(page_base_of((uintptr_t)table)), PAGE_ROUND_UP(PAGE_SIZE * 2), "DMI Decoder Finding Table", Region::Access::Read, false, false);
+        SMBIOS::TableHeader* table_v_ptr = (SMBIOS::TableHeader*)region->vaddr().offset(offset_in_page((uintptr_t)table)).as_ptr();
         if (table_v_ptr->type == table_type) {
             return table;
         }
diff --git a/Kernel/ACPI/Definitions.h b/Kernel/ACPI/Definitions.h
index 1f1bd3928d..9fadb6e3d4 100644
--- a/Kernel/ACPI/Definitions.h
+++ b/Kernel/ACPI/Definitions.h
@@ -201,7 +201,7 @@ struct GenericAddressStructure {
         this->bit_width = other.bit_width;
         this->bit_offset = other.bit_offset;
         this->access_size = other.access_size;
-        this->address = (u32)other.address;
+        this->address = (uintptr_t)other.address;
         return *this;
     }
     GenericAddressStructure& operator=(const ACPI_RAW::GenericAddressStructure& other)
@@ -210,7 +210,7 @@ struct GenericAddressStructure {
         this->bit_width = other.bit_width;
         this->bit_offset = other.bit_offset;
         this->access_size = other.access_size;
-        this->address = (u32)other.address;
+        this->address = (uintptr_t)other.address;
         return *this;
     }
 };
diff --git a/Kernel/Arch/i386/CPU.h b/Kernel/Arch/i386/CPU.h
index 540d6a2b89..2d52d5ac64 100644
--- a/Kernel/Arch/i386/CPU.h
+++ b/Kernel/Arch/i386/CPU.h
@@ -33,7 +33,7 @@
 #include <Kernel/kstdio.h>
 
 #define PAGE_SIZE 4096
-#define PAGE_MASK 0xfffff000
+#define PAGE_MASK ((uintptr_t)0xfffff000u)
 
 class MemoryManager;
 class PageDirectory;
@@ -452,12 +452,12 @@ struct [[gnu::aligned(16)]] FPUState
     u8 buffer[512];
 };
 
-inline constexpr u32 page_base_of(u32 address)
+inline constexpr uintptr_t page_base_of(uintptr_t address)
 {
     return address & PAGE_MASK;
 }
 
-inline constexpr u32 offset_in_page(u32 address)
+inline constexpr uintptr_t offset_in_page(uintptr_t address)
 {
     return address & (~PAGE_MASK);
 }
diff --git a/Kernel/KSyms.cpp b/Kernel/KSyms.cpp
index cf9be648b6..1b167a8e72 100644
--- a/Kernel/KSyms.cpp
+++ b/Kernel/KSyms.cpp
@@ -134,13 +134,13 @@ static void load_ksyms_from_data(const ByteBuffer& buffer)
     int recognized_symbol_count = 0;
     if (use_ksyms) {
         for (u32* stack_ptr = (u32*)ebp;
-             (current ? current->process().validate_read_from_kernel(VirtualAddress((u32)stack_ptr), sizeof(void*) * 2) : 1) && recognized_symbol_count < max_recognized_symbol_count; stack_ptr = (u32*)*stack_ptr) {
+             (current ? current->process().validate_read_from_kernel(VirtualAddress((uintptr_t)stack_ptr), sizeof(void*) * 2) : 1) && recognized_symbol_count < max_recognized_symbol_count; stack_ptr = (u32*)*stack_ptr) {
             u32 retaddr = stack_ptr[1];
             recognized_symbols[recognized_symbol_count++] = { retaddr, ksymbolicate(retaddr) };
         }
     } else {
         for (u32* stack_ptr = (u32*)ebp;
-             (current ? current->process().validate_read_from_kernel(VirtualAddress((u32)stack_ptr), sizeof(void*) * 2) : 1); stack_ptr = (u32*)*stack_ptr) {
+             (current ? current->process().validate_read_from_kernel(VirtualAddress((uintptr_t)stack_ptr), sizeof(void*) * 2) : 1); stack_ptr = (u32*)*stack_ptr) {
             u32 retaddr = stack_ptr[1];
             dbgprintf("%x (next: %x)\n", retaddr, stack_ptr ? (u32*)*stack_ptr : 0);
         }
diff --git a/Kernel/Net/E1000NetworkAdapter.cpp b/Kernel/Net/E1000NetworkAdapter.cpp
index f9bd3a54f2..8ab2937fb9 100644
--- a/Kernel/Net/E1000NetworkAdapter.cpp
+++ b/Kernel/Net/E1000NetworkAdapter.cpp
@@ -253,14 +253,14 @@ bool E1000NetworkAdapter::link_up()
 
 void E1000NetworkAdapter::initialize_rx_descriptors()
 {
-    auto ptr = (u32)kmalloc_eternal(sizeof(e1000_rx_desc) * number_of_rx_descriptors + 16);
+    auto ptr = (uintptr_t)kmalloc_eternal(sizeof(e1000_rx_desc) * number_of_rx_descriptors + 16);
     // Make sure it's 16-byte aligned.
     if (ptr % 16)
         ptr = (ptr + 16) - (ptr % 16);
     m_rx_descriptors = (e1000_rx_desc*)ptr;
     for (int i = 0; i < number_of_rx_descriptors; ++i) {
         auto& descriptor = m_rx_descriptors[i];
-        auto addr = (u32)kmalloc_eternal(8192 + 16);
+        auto addr = (uintptr_t)kmalloc_eternal(8192 + 16);
         if (addr % 16)
             addr = (addr + 16) - (addr % 16);
         descriptor.addr = addr - 0xc0000000;
@@ -278,14 +278,14 @@ void E1000NetworkAdapter::initialize_rx_descriptors()
 
 void E1000NetworkAdapter::initialize_tx_descriptors()
 {
-    auto ptr = (u32)kmalloc_eternal(sizeof(e1000_tx_desc) * number_of_tx_descriptors + 16);
+    auto ptr = (uintptr_t)kmalloc_eternal(sizeof(e1000_tx_desc) * number_of_tx_descriptors + 16);
     // Make sure it's 16-byte aligned.
     if (ptr % 16)
         ptr = (ptr + 16) - (ptr % 16);
     m_tx_descriptors = (e1000_tx_desc*)ptr;
     for (int i = 0; i < number_of_tx_descriptors; ++i) {
         auto& descriptor = m_tx_descriptors[i];
-        auto addr = (u32)kmalloc_eternal(8192 + 16);
+        auto addr = (uintptr_t)kmalloc_eternal(8192 + 16);
         if (addr % 16)
             addr = (addr + 16) - (addr % 16);
         descriptor.addr = addr - 0xc0000000;
diff --git a/Kernel/Net/RTL8139NetworkAdapter.cpp b/Kernel/Net/RTL8139NetworkAdapter.cpp
index be38777898..c24704f3d9 100644
--- a/Kernel/Net/RTL8139NetworkAdapter.cpp
+++ b/Kernel/Net/RTL8139NetworkAdapter.cpp
@@ -157,16 +157,16 @@ RTL8139NetworkAdapter::RTL8139NetworkAdapter(PCI::Address pci_address, u8 irq)
     // we add space to account for overhang from the last packet - the rtl8139
     // can optionally guarantee that packets will be contiguous by
     // purposefully overrunning the rx buffer
-    m_rx_buffer_addr = (u32)virtual_to_low_physical(kmalloc_aligned(RX_BUFFER_SIZE + PACKET_SIZE_MAX, 16));
+    m_rx_buffer_addr = (uintptr_t)virtual_to_low_physical(kmalloc_aligned(RX_BUFFER_SIZE + PACKET_SIZE_MAX, 16));
     kprintf("RTL8139: RX buffer: P%p\n", m_rx_buffer_addr);
 
-    auto tx_buffer_addr = (u32)virtual_to_low_physical(kmalloc_aligned(TX_BUFFER_SIZE * 4, 16));
+    auto tx_buffer_addr = (uintptr_t)virtual_to_low_physical(kmalloc_aligned(TX_BUFFER_SIZE * 4, 16));
     for (int i = 0; i < RTL8139_TX_BUFFER_COUNT; i++) {
         m_tx_buffer_addr[i] = tx_buffer_addr + TX_BUFFER_SIZE * i;
         kprintf("RTL8139: TX buffer %d: P%p\n", i, m_tx_buffer_addr[i]);
     }
 
-    m_packet_buffer = (u32)kmalloc(PACKET_SIZE_MAX);
+    m_packet_buffer = (uintptr_t)kmalloc(PACKET_SIZE_MAX);
 
     reset();
 
diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index 027eea7a63..a800a78ceb 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -274,7 +274,7 @@ int Process::sys$set_mmap_name(const Syscall::SC_set_mmap_name_params* user_para
     if (name.is_null())
         return -EFAULT;
 
-    auto* region = region_from_range({ VirtualAddress((u32)params.addr), params.size });
+    auto* region = region_from_range({ VirtualAddress((uintptr_t)params.addr), params.size });
     if (!region)
         return -EINVAL;
     if (!region->is_mmap())
@@ -364,7 +364,7 @@ void* Process::sys$mmap(const Syscall::SC_mmap_params* user_params)
 
     if (size == 0)
         return (void*)-EINVAL;
-    if ((u32)addr & ~PAGE_MASK)
+    if ((uintptr_t)addr & ~PAGE_MASK)
         return (void*)-EINVAL;
 
     bool map_shared = flags & MAP_SHARED;
@@ -390,11 +390,11 @@ void* Process::sys$mmap(const Syscall::SC_mmap_params* user_params)
 
     if (map_purgeable) {
         auto vmobject = PurgeableVMObject::create_with_size(size);
-        region = allocate_region_with_vmobject(VirtualAddress((u32)addr), size, vmobject, 0, !name.is_null() ? name : "mmap (purgeable)", prot);
+        region = allocate_region_with_vmobject(VirtualAddress((uintptr_t)addr), size, vmobject, 0, !name.is_null() ? name : "mmap (purgeable)", prot);
         if (!region && (!map_fixed && addr != 0))
             region = allocate_region_with_vmobject({}, size, vmobject, 0, !name.is_null() ? name : "mmap (purgeable)", prot);
     } else if (map_anonymous) {
-        region = allocate_region(VirtualAddress((u32)addr), size, !name.is_null() ? name : "mmap", prot, false);
+        region = allocate_region(VirtualAddress((uintptr_t)addr), size, !name.is_null() ? name : "mmap", prot, false);
         if (!region && (!map_fixed && addr != 0))
             region = allocate_region({}, size, !name.is_null() ? name : "mmap", prot, false);
     } else {
@@ -418,7 +418,7 @@ void* Process::sys$mmap(const Syscall::SC_mmap_params* user_params)
             if (!validate_inode_mmap_prot(*this, prot, *description->inode()))
                 return (void*)-EACCES;
         }
-        auto region_or_error = description->mmap(*this, VirtualAddress((u32)addr), static_cast<size_t>(offset), size, prot);
+        auto region_or_error = description->mmap(*this, VirtualAddress((uintptr_t)addr), static_cast<size_t>(offset), size, prot);
         if (region_or_error.is_error()) {
             // Fail if MAP_FIXED or address is 0, retry otherwise
             if (map_fixed || addr == 0)
@@ -445,7 +445,7 @@ void* Process::sys$mmap(const Syscall::SC_mmap_params* user_params)
 int Process::sys$munmap(void* addr, size_t size)
 {
     REQUIRE_PROMISE(stdio);
-    Range range_to_unmap { VirtualAddress((u32)addr), size };
+    Range range_to_unmap { VirtualAddress((uintptr_t)addr), size };
     if (auto* whole_region = region_from_range(range_to_unmap)) {
         if (!whole_region->is_mmap())
             return -EPERM;
@@ -482,7 +482,7 @@ int Process::sys$munmap(void* addr, size_t size)
 int Process::sys$mprotect(void* addr, size_t size, int prot)
 {
     REQUIRE_PROMISE(stdio);
-    Range range_to_mprotect = { VirtualAddress((u32)addr), size };
+    Range range_to_mprotect = { VirtualAddress((uintptr_t)addr), size };
 
     if (auto* whole_region = region_from_range(range_to_mprotect)) {
         if (!whole_region->is_mmap())
@@ -545,7 +545,7 @@ int Process::sys$mprotect(void* addr, size_t size, int prot)
 int Process::sys$madvise(void* address, size_t size, int advice)
 {
     REQUIRE_PROMISE(stdio);
-    auto* region = region_from_range({ VirtualAddress((u32)address), size });
+    auto* region = region_from_range({ VirtualAddress((uintptr_t)address), size });
     if (!region)
         return -EINVAL;
     if (!region->is_mmap())
@@ -1219,7 +1219,7 @@ Process* Process::create_user_process(Thread*& first_thread, const String& path,
 Process* Process::create_kernel_process(Thread*& first_thread, String&& name, void (*e)())
 {
     auto* process = new Process(first_thread, move(name), (uid_t)0, (gid_t)0, (pid_t)0, Ring0);
-    first_thread->tss().eip = (u32)e;
+    first_thread->tss().eip = (uintptr_t)e;
 
     if (process->pid() != 0) {
         InterruptDisabler disabler;
@@ -1415,7 +1415,7 @@ int Process::sys$sigreturn(RegisterDump& registers)
     stack_ptr++;
 
     //pop edi, esi, ebp, esp, ebx, edx, ecx and eax
-    memcpy(&registers.edi, stack_ptr, 8 * sizeof(u32));
+    memcpy(&registers.edi, stack_ptr, 8 * sizeof(uintptr_t));
     stack_ptr += 8;
 
     registers.eip = *stack_ptr;
@@ -2356,7 +2356,7 @@ bool Process::validate_read_from_kernel(VirtualAddress vaddr, ssize_t size) cons
 bool Process::validate_read(const void* address, ssize_t size) const
 {
     ASSERT(size >= 0);
-    VirtualAddress first_address((u32)address);
+    VirtualAddress first_address((uintptr_t)address);
     if (is_ring0()) {
         if (is_kmalloc_address(address))
             return true;
@@ -2369,7 +2369,7 @@ bool Process::validate_read(const void* address, ssize_t size) const
 bool Process::validate_write(void* address, ssize_t size) const
 {
     ASSERT(size >= 0);
-    VirtualAddress first_address((u32)address);
+    VirtualAddress first_address((uintptr_t)address);
     if (is_ring0()) {
         if (is_kmalloc_address(address))
             return true;
@@ -3632,13 +3632,13 @@ int Process::sys$create_thread(void* (*entry)(void*), void* argument, const Sysc
     thread->set_joinable(is_thread_joinable);
 
     auto& tss = thread->tss();
-    tss.eip = (u32)entry;
+    tss.eip = (uintptr_t)entry;
     tss.eflags = 0x0202;
     tss.cr3 = page_directory().cr3();
     tss.esp = user_stack_address;
 
     // NOTE: The stack needs to be 16-byte aligned.
-    thread->push_value_on_stack((u32)argument);
+    thread->push_value_on_stack((uintptr_t)argument);
     thread->push_value_on_stack(0);
 
     thread->make_thread_specific_region({});
@@ -4399,7 +4399,7 @@ Thread& Process::any_thread()
 
 WaitQueue& Process::futex_queue(i32* userspace_address)
 {
-    auto& queue = m_futex_queues.ensure((u32)userspace_address);
+    auto& queue = m_futex_queues.ensure((uintptr_t)userspace_address);
     if (!queue)
         queue = make<WaitQueue>();
     return *queue;
diff --git a/Kernel/Thread.cpp b/Kernel/Thread.cpp
index 12c34c1a75..f2cf0e9588 100644
--- a/Kernel/Thread.cpp
+++ b/Kernel/Thread.cpp
@@ -597,8 +597,8 @@ void Thread::set_default_signal_dispositions()
 {
     // FIXME: Set up all the right default actions. See signal(7).
     memset(&m_signal_action_data, 0, sizeof(m_signal_action_data));
-    m_signal_action_data[SIGCHLD].handler_or_sigaction = VirtualAddress((u32)SIG_IGN);
-    m_signal_action_data[SIGWINCH].handler_or_sigaction = VirtualAddress((u32)SIG_IGN);
+    m_signal_action_data[SIGCHLD].handler_or_sigaction = VirtualAddress((uintptr_t)SIG_IGN);
+    m_signal_action_data[SIGWINCH].handler_or_sigaction = VirtualAddress((uintptr_t)SIG_IGN);
 }
 
 void Thread::push_value_on_stack(u32 value)
@@ -657,9 +657,9 @@ u32 Thread::make_userspace_stack_for_main_thread(Vector<String> arguments, Vecto
     };
 
     // NOTE: The stack needs to be 16-byte aligned.
-    push_on_new_stack((u32)env);
-    push_on_new_stack((u32)argv);
-    push_on_new_stack((u32)argc);
+    push_on_new_stack((uintptr_t)env);
+    push_on_new_stack((uintptr_t)argv);
+    push_on_new_stack((uintptr_t)argc);
     push_on_new_stack(0);
     return new_esp;
 }
@@ -770,20 +770,20 @@ String Thread::backtrace_impl() const
     auto& process = const_cast<Process&>(this->process());
     ProcessPagingScope paging_scope(process);
 
-    u32 stack_ptr = start_frame;
+    uintptr_t stack_ptr = start_frame;
     for (;;) {
-        if (!process.validate_read_from_kernel(VirtualAddress((u32)stack_ptr), sizeof(void*) * 2))
+        if (!process.validate_read_from_kernel(VirtualAddress((uintptr_t)stack_ptr), sizeof(void*) * 2))
             break;
-        u32 retaddr;
+        uintptr_t retaddr;
 
-        if (is_user_range(VirtualAddress(stack_ptr), sizeof(void*) * 2)) {
-            copy_from_user(&retaddr, &((u32*)stack_ptr)[1]);
+        if (is_user_range(VirtualAddress(stack_ptr), sizeof(uintptr_t) * 2)) {
+            copy_from_user(&retaddr, &((uintptr_t*)stack_ptr)[1]);
             recognized_symbols.append({ retaddr, ksymbolicate(retaddr) });
-            copy_from_user(&stack_ptr, (u32*)stack_ptr);
+            copy_from_user(&stack_ptr, (uintptr_t*)stack_ptr);
         } else {
-            memcpy(&retaddr, &((u32*)stack_ptr)[1], sizeof(void*));
+            memcpy(&retaddr, &((uintptr_t*)stack_ptr)[1], sizeof(uintptr_t));
             recognized_symbols.append({ retaddr, ksymbolicate(retaddr) });
-            memcpy(&stack_ptr, (u32*)stack_ptr, sizeof(void*));
+            memcpy(&stack_ptr, (uintptr_t*)stack_ptr, sizeof(uintptr_t));
         }
     }
 
@@ -795,14 +795,14 @@ String Thread::backtrace_impl() const
     return builder.to_string();
 }
 
-Vector<u32> Thread::raw_backtrace(u32 ebp) const
+Vector<uintptr_t> Thread::raw_backtrace(uintptr_t ebp) const
 {
     auto& process = const_cast<Process&>(this->process());
     ProcessPagingScope paging_scope(process);
-    Vector<u32, Profiling::max_stack_frame_count> backtrace;
+    Vector<uintptr_t, Profiling::max_stack_frame_count> backtrace;
     backtrace.append(ebp);
-    for (u32* stack_ptr = (u32*)ebp; process.validate_read_from_kernel(VirtualAddress((u32)stack_ptr), sizeof(void*) * 2); stack_ptr = (u32*)*stack_ptr) {
-        u32 retaddr = stack_ptr[1];
+    for (uintptr_t* stack_ptr = (uintptr_t*)ebp; process.validate_read_from_kernel(VirtualAddress((uintptr_t)stack_ptr), sizeof(uintptr_t) * 2); stack_ptr = (uintptr_t*)*stack_ptr) {
+        uintptr_t retaddr = stack_ptr[1];
         backtrace.append(retaddr);
         if (backtrace.size() == Profiling::max_stack_frame_count)
             break;
@@ -818,7 +818,7 @@ void Thread::make_thread_specific_region(Badge<Process>)
     SmapDisabler disabler;
     auto* thread_specific_data = (ThreadSpecificData*)region->vaddr().offset(align_up_to(process().m_master_tls_size, thread_specific_region_alignment)).as_ptr();
     auto* thread_local_storage = (u8*)((u8*)thread_specific_data) - align_up_to(process().m_master_tls_size, process().m_master_tls_alignment);
-    m_thread_specific_data = VirtualAddress((u32)thread_specific_data);
+    m_thread_specific_data = VirtualAddress((uintptr_t)thread_specific_data);
     thread_specific_data->self = thread_specific_data;
     if (process().m_master_tls_size)
         memcpy(thread_local_storage, process().m_master_tls_region->vaddr().as_ptr(), process().m_master_tls_size);
diff --git a/Kernel/VM/MemoryManager.cpp b/Kernel/VM/MemoryManager.cpp
index d55243d9b3..80dd6fedaf 100644
--- a/Kernel/VM/MemoryManager.cpp
+++ b/Kernel/VM/MemoryManager.cpp
@@ -66,17 +66,17 @@ MemoryManager::~MemoryManager()
 void MemoryManager::protect_kernel_image()
 {
     // Disable writing to the kernel text and rodata segments.
-    extern u32 start_of_kernel_text;
-    extern u32 start_of_kernel_data;
-    for (size_t i = (u32)&start_of_kernel_text; i < (u32)&start_of_kernel_data; i += PAGE_SIZE) {
+    extern uintptr_t start_of_kernel_text;
+    extern uintptr_t start_of_kernel_data;
+    for (size_t i = (uintptr_t)&start_of_kernel_text; i < (uintptr_t)&start_of_kernel_data; i += PAGE_SIZE) {
         auto& pte = ensure_pte(kernel_page_directory(), VirtualAddress(i));
         pte.set_writable(false);
     }
 
     if (g_cpu_supports_nx) {
         // Disable execution of the kernel data and bss segments.
-        extern u32 end_of_kernel_bss;
-        for (size_t i = (u32)&start_of_kernel_data; i < (u32)&end_of_kernel_bss; i += PAGE_SIZE) {
+        extern uintptr_t end_of_kernel_bss;
+        for (size_t i = (uintptr_t)&start_of_kernel_data; i < (uintptr_t)&end_of_kernel_bss; i += PAGE_SIZE) {
             auto& pte = ensure_pte(kernel_page_directory(), VirtualAddress(i));
             pte.set_execute_disabled(true);
         }
@@ -101,7 +101,7 @@ void MemoryManager::setup_low_1mb()
     if (g_cpu_supports_nx)
         pde_zero.set_execute_disabled(true);
 
-    for (u32 offset = 0; offset < (2 * MB); offset += PAGE_SIZE) {
+    for (uintptr_t offset = 0; offset < (2 * MB); offset += PAGE_SIZE) {
         auto& page_table_page = m_low_page_table;
         auto& pte = quickmap_pt(page_table_page->paddr())[offset / PAGE_SIZE];
         pte.set_physical_page_base(offset);
@@ -119,11 +119,11 @@ void MemoryManager::parse_memory_map()
     auto* mmap = (multiboot_memory_map_t*)(low_physical_to_virtual(multiboot_info_ptr->mmap_addr));
     for (; (unsigned long)mmap < (low_physical_to_virtual(multiboot_info_ptr->mmap_addr)) + (multiboot_info_ptr->mmap_length); mmap = (multiboot_memory_map_t*)((unsigned long)mmap + mmap->size + sizeof(mmap->size))) {
         kprintf("MM: Multiboot mmap: base_addr = 0x%x%08x, length = 0x%x%08x, type = 0x%x\n",
-            (u32)(mmap->addr >> 32),
-            (u32)(mmap->addr & 0xffffffff),
-            (u32)(mmap->len >> 32),
-            (u32)(mmap->len & 0xffffffff),
-            (u32)mmap->type);
+            (uintptr_t)(mmap->addr >> 32),
+            (uintptr_t)(mmap->addr & 0xffffffff),
+            (uintptr_t)(mmap->len >> 32),
+            (uintptr_t)(mmap->len & 0xffffffff),
+            (uintptr_t)mmap->type);
 
         if (mmap->type != MULTIBOOT_MEMORY_AVAILABLE)
             continue;
@@ -135,7 +135,7 @@ void MemoryManager::parse_memory_map()
         if ((mmap->addr + mmap->len) > 0xffffffff)
             continue;
 
-        auto diff = (u32)mmap->addr % PAGE_SIZE;
+        auto diff = (uintptr_t)mmap->addr % PAGE_SIZE;
         if (diff != 0) {
             kprintf("MM: got an unaligned region base from the bootloader; correcting %p by %d bytes\n", mmap->addr, diff);
             diff = PAGE_SIZE - diff;
@@ -153,7 +153,7 @@ void MemoryManager::parse_memory_map()
 
 #ifdef MM_DEBUG
         kprintf("MM: considering memory at %p - %p\n",
-            (u32)mmap->addr, (u32)(mmap->addr + mmap->len));
+            (uintptr_t)mmap->addr, (uintptr_t)(mmap->addr + mmap->len));
 #endif
 
         for (size_t page_base = mmap->addr; page_base < (mmap->addr + mmap->len); page_base += PAGE_SIZE) {
@@ -219,7 +219,7 @@ PageTableEntry& MemoryManager::ensure_pte(PageDirectory& page_directory, Virtual
         page_directory.m_physical_pages.set(page_directory_index, move(page_table));
     }
 
-    return quickmap_pt(PhysicalAddress((u32)pde.page_table_base()))[page_table_index];
+    return quickmap_pt(PhysicalAddress((uintptr_t)pde.page_table_base()))[page_table_index];
 }
 
 void MemoryManager::initialize()
@@ -410,7 +410,7 @@ RefPtr<PhysicalPage> MemoryManager::allocate_user_physical_page(ShouldZeroFill s
 #endif
 
     if (should_zero_fill == ShouldZeroFill::Yes) {
-        auto* ptr = (u32*)quickmap_page(*page);
+        auto* ptr = quickmap_page(*page);
         memset(ptr, 0, PAGE_SIZE);
         unquickmap_page();
     }
diff --git a/Kernel/VM/PageDirectory.cpp b/Kernel/VM/PageDirectory.cpp
index 38994152a4..9bb56d7b79 100644
--- a/Kernel/VM/PageDirectory.cpp
+++ b/Kernel/VM/PageDirectory.cpp
@@ -30,9 +30,9 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <Kernel/VM/PageDirectory.h>
 
-static const u32 userspace_range_base = 0x00800000;
-static const u32 userspace_range_ceiling = 0xbe000000;
-static const u32 kernelspace_range_base = 0xc0800000;
+static const uintptr_t userspace_range_base = 0x00800000;
+static const uintptr_t userspace_range_ceiling = 0xbe000000;
+static const uintptr_t kernelspace_range_base = 0xc0800000;
 
 static HashMap<u32, PageDirectory*>& cr3_map()
 {
@@ -58,9 +58,9 @@ PageDirectory::PageDirectory()
     m_range_allocator.initialize_with_range(VirtualAddress(0xc0800000), 0x3f000000);
 
     // Adopt the page tables already set up by boot.S
-    PhysicalAddress boot_pdpt_paddr(virtual_to_low_physical((u32)boot_pdpt));
-    PhysicalAddress boot_pd0_paddr(virtual_to_low_physical((u32)boot_pd0));
-    PhysicalAddress boot_pd3_paddr(virtual_to_low_physical((u32)boot_pd3));
+    PhysicalAddress boot_pdpt_paddr(virtual_to_low_physical((uintptr_t)boot_pdpt));
+    PhysicalAddress boot_pd0_paddr(virtual_to_low_physical((uintptr_t)boot_pd0));
+    PhysicalAddress boot_pd3_paddr(virtual_to_low_physical((uintptr_t)boot_pd3));
     kprintf("MM: boot_pdpt @ P%p\n", boot_pdpt_paddr.get());
     kprintf("MM: boot_pd0 @ P%p\n", boot_pd0_paddr.get());
     kprintf("MM: boot_pd3 @ P%p\n", boot_pd3_paddr.get());
diff --git a/Kernel/VM/PhysicalAddress.h b/Kernel/VM/PhysicalAddress.h
index 9c70989daf..4f96b78792 100644
--- a/Kernel/VM/PhysicalAddress.h
+++ b/Kernel/VM/PhysicalAddress.h
@@ -32,22 +32,22 @@
 class PhysicalAddress {
 public:
     PhysicalAddress() {}
-    explicit PhysicalAddress(u32 address)
+    explicit PhysicalAddress(uintptr_t address)
         : m_address(address)
     {
     }
 
-    PhysicalAddress offset(u32 o) const { return PhysicalAddress(m_address + o); }
-    u32 get() const { return m_address; }
-    void set(u32 address) { m_address = address; }
-    void mask(u32 m) { m_address &= m; }
+    PhysicalAddress offset(uintptr_t o) const { return PhysicalAddress(m_address + o); }
+    uintptr_t get() const { return m_address; }
+    void set(uintptr_t address) { m_address = address; }
+    void mask(uintptr_t m) { m_address &= m; }
 
     bool is_null() const { return m_address == 0; }
 
     u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
     const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
 
-    u32 page_base() const { return m_address & 0xfffff000; }
+    uintptr_t page_base() const { return m_address & 0xfffff000; }
 
     bool operator==(const PhysicalAddress& other) const { return m_address == other.m_address; }
     bool operator!=(const PhysicalAddress& other) const { return m_address != other.m_address; }
@@ -57,7 +57,7 @@ public:
     bool operator<=(const PhysicalAddress& other) const { return m_address <= other.m_address; }
 
 private:
-    u32 m_address { 0 };
+    uintptr_t m_address { 0 };
 };
 
 inline const LogStream& operator<<(const LogStream& stream, PhysicalAddress value)
diff --git a/Kernel/VM/PhysicalRegion.cpp b/Kernel/VM/PhysicalRegion.cpp
index 5539e29e91..cad0d255e2 100644
--- a/Kernel/VM/PhysicalRegion.cpp
+++ b/Kernel/VM/PhysicalRegion.cpp
@@ -101,11 +101,11 @@ void PhysicalRegion::return_page_at(PhysicalAddress addr)
         ASSERT_NOT_REACHED();
     }
 
-    int local_offset = addr.get() - m_lower.get();
+    ptrdiff_t local_offset = addr.get() - m_lower.get();
     ASSERT(local_offset >= 0);
-    ASSERT((u32)local_offset < (u32)(m_pages * PAGE_SIZE));
+    ASSERT((uintptr_t)local_offset < (uintptr_t)(m_pages * PAGE_SIZE));
 
-    auto page = (unsigned)local_offset / PAGE_SIZE;
+    auto page = (uintptr_t)local_offset / PAGE_SIZE;
     if (page < m_last)
         m_last = page;
 
diff --git a/Kernel/VM/VirtualAddress.h b/Kernel/VM/VirtualAddress.h
index 779f61de24..92dfb6698d 100644
--- a/Kernel/VM/VirtualAddress.h
+++ b/Kernel/VM/VirtualAddress.h
@@ -32,23 +32,23 @@
 class VirtualAddress {
 public:
     VirtualAddress() {}
-    explicit VirtualAddress(u32 address)
+    explicit VirtualAddress(uintptr_t address)
         : m_address(address)
     {
     }
 
     explicit VirtualAddress(const void* address)
-        : m_address((u32)address)
+        : m_address((uintptr_t)address)
     {
     }
 
     bool is_null() const { return m_address == 0; }
     bool is_page_aligned() const { return (m_address & 0xfff) == 0; }
 
-    VirtualAddress offset(u32 o) const { return VirtualAddress(m_address + o); }
-    u32 get() const { return m_address; }
-    void set(u32 address) { m_address = address; }
-    void mask(u32 m) { m_address &= m; }
+    VirtualAddress offset(uintptr_t o) const { return VirtualAddress(m_address + o); }
+    uintptr_t get() const { return m_address; }
+    void set(uintptr_t address) { m_address = address; }
+    void mask(uintptr_t m) { m_address &= m; }
 
     bool operator<=(const VirtualAddress& other) const { return m_address <= other.m_address; }
     bool operator>=(const VirtualAddress& other) const { return m_address >= other.m_address; }
@@ -63,7 +63,7 @@ public:
     VirtualAddress page_base() const { return VirtualAddress(m_address & 0xfffff000); }
 
 private:
-    u32 m_address { 0 };
+    uintptr_t m_address { 0 };
 };
 
 inline VirtualAddress operator-(const VirtualAddress& a, const VirtualAddress& b)