LibC: fflush stdout when reading from stdin

This is the *intended behaviour* per ISO C specification

kernel/arch/i686/boot.S

@@ -14,6 +14,23 @@
 # multiboot2 header
 .section .multiboot, "aw"
 	.align 8
+multiboot_start:
+	.long 0x1BADB002
+	.long (1 << 2) # page align modules
+	.long -(0x1BADB002 + (1 << 2))
+
+	.long 0
+	.long 0
+	.long 0
+	.long 0
+	.long 0
+
+	.long 0
+	.long FB_WIDTH
+	.long FB_HEIGHT
+	.long FB_BPP
+multiboot_end:
+	.align 8
 multiboot2_start:
 	.long 0xE85250D6
 	.long 0

kernel/arch/x86_64/boot.S

@@ -14,6 +14,23 @@
 # multiboot2 header
 .section .multiboot, "aw"
 	.align 8
+multiboot_start:
+	.long 0x1BADB002
+	.long (1 << 2) # page align modules
+	.long -(0x1BADB002 + (1 << 2))
+
+	.long 0
+	.long 0
+	.long 0
+	.long 0
+	.long 0
+
+	.long 0
+	.long FB_WIDTH
+	.long FB_HEIGHT
+	.long FB_BPP
+multiboot_end:
+	.align 8
 multiboot2_start:
 	.long 0xE85250D6
 	.long 0

kernel/include/kernel/Device/Device.h

@@ -16,7 +16,11 @@ namespace Kernel
 		virtual bool is_partition() const { return false; }
 		virtual bool is_storage_device() const { return false; }
 
-		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> mmap_region(PageTable&, off_t offset, size_t len, AddressRange, MemoryRegion::Type, PageTable::flags_t) { (void)offset; (void)len; return BAN::Error::from_errno(EINVAL); }
+		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> mmap_region(PageTable&, off_t offset, size_t len, AddressRange, MemoryRegion::Type, PageTable::flags_t, int status_flags)
+		{
+			(void)offset; (void)len; (void)status_flags;
+			return BAN::Error::from_errno(ENOTSUP);
+		}
 
 		virtual dev_t rdev() const override = 0;
 

kernel/include/kernel/Device/FramebufferDevice.h

@@ -27,7 +27,7 @@ namespace Kernel
 		void sync_pixels_linear(uint32_t first_pixel, uint32_t pixel_count);
 		void sync_pixels_rectangle(uint32_t top_right_x, uint32_t top_right_y, uint32_t width, uint32_t height);
 
-		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> mmap_region(PageTable&, off_t offset, size_t len, AddressRange, MemoryRegion::Type, PageTable::flags_t) override;
+		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> mmap_region(PageTable&, off_t offset, size_t len, AddressRange, MemoryRegion::Type, PageTable::flags_t, int status_flags) override;
 
 		virtual dev_t rdev() const override { return m_rdev; }
 		virtual BAN::StringView name() const override { return m_name.sv(); }

kernel/include/kernel/FS/Inode.h

@@ -22,7 +22,7 @@ namespace Kernel
 
 	class FileBackedRegion;
 	class FileSystem;
-	class SharedFileData;
+	struct SharedFileData;
 
 	class Inode : public BAN::RefCounted<Inode>
 	{

kernel/include/kernel/Memory/FileBackedRegion.h

@@ -27,18 +27,18 @@ namespace Kernel
 		BAN_NON_MOVABLE(FileBackedRegion);
 
 	public:
-		static BAN::ErrorOr<BAN::UniqPtr<FileBackedRegion>> create(BAN::RefPtr<Inode>, PageTable&, off_t offset, size_t size, AddressRange address_range, Type, PageTable::flags_t);
+		static BAN::ErrorOr<BAN::UniqPtr<FileBackedRegion>> create(BAN::RefPtr<Inode>, PageTable&, off_t offset, size_t size, AddressRange address_range, Type, PageTable::flags_t, int status_flags);
 		~FileBackedRegion();
 
-		virtual BAN::ErrorOr<void> msync(vaddr_t, size_t, int) override;
+		BAN::ErrorOr<void> msync(vaddr_t, size_t, int) override;
 
-		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override;
+		BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override;
 
 	protected:
-		virtual BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override;
+		BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override;
 
 	private:
-		FileBackedRegion(BAN::RefPtr<Inode>, PageTable&, off_t offset, ssize_t size, Type flags, PageTable::flags_t page_flags);
+		FileBackedRegion(BAN::RefPtr<Inode>, PageTable&, off_t offset, ssize_t size, Type type, PageTable::flags_t flags, int status_flags);
 
 	private:
 		BAN::RefPtr<Inode> m_inode;

kernel/include/kernel/Memory/MemoryBackedRegion.h

@@ -11,22 +11,22 @@ namespace Kernel
 		BAN_NON_MOVABLE(MemoryBackedRegion);
 
 	public:
-		static BAN::ErrorOr<BAN::UniqPtr<MemoryBackedRegion>> create(PageTable&, size_t size, AddressRange, Type, PageTable::flags_t);
+		static BAN::ErrorOr<BAN::UniqPtr<MemoryBackedRegion>> create(PageTable&, size_t size, AddressRange, Type, PageTable::flags_t, int status_flags);
 		~MemoryBackedRegion();
 
-		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override;
+		BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override;
 
-		virtual BAN::ErrorOr<void> msync(vaddr_t, size_t, int) override { return {}; }
+		BAN::ErrorOr<void> msync(vaddr_t, size_t, int) override { return {}; }
 
 		// Copy data from buffer into this region
 		// This can fail if no memory is mapped and no free memory was available
 		BAN::ErrorOr<void> copy_data_to_region(size_t offset_into_region, const uint8_t* buffer, size_t buffer_size);
 
 	protected:
-		virtual BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override;
+		BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override;
 
 	private:
-		MemoryBackedRegion(PageTable&, size_t size, Type, PageTable::flags_t);
+		MemoryBackedRegion(PageTable&, size_t size, Type, PageTable::flags_t, int status_flags);
 	};
 
 }

kernel/include/kernel/Memory/MemoryRegion.h

@@ -39,6 +39,10 @@ namespace Kernel
 		size_t size() const { return m_size; }
 		vaddr_t vaddr() const { return m_vaddr; }
 
+		int status_flags() const { return m_status_flags; }
+		Type type() const { return m_type; }
+		PageTable::flags_t flags() const { return m_flags; }
+
 		size_t virtual_page_count() const { return BAN::Math::div_round_up<size_t>(m_size, PAGE_SIZE); }
 		size_t physical_page_count() const { return m_physical_page_count; }
 
@@ -46,6 +50,7 @@ namespace Kernel
 		void unpin();
 		void wait_not_pinned();
 
+		BAN::ErrorOr<void> mprotect(PageTable::flags_t);
 		virtual BAN::ErrorOr<void> msync(vaddr_t, size_t, int) = 0;
 
 		// Returns error if no memory was available
@@ -56,7 +61,7 @@ namespace Kernel
 		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) = 0;
 
 	protected:
-		MemoryRegion(PageTable&, size_t size, Type type, PageTable::flags_t flags);
+		MemoryRegion(PageTable&, size_t size, Type type, PageTable::flags_t flags, int status_flags);
 		BAN::ErrorOr<void> initialize(AddressRange);
 
 		virtual BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t address, bool wants_write) = 0;
@@ -65,7 +70,8 @@ namespace Kernel
 		PageTable& m_page_table;
 		const size_t m_size;
 		const Type m_type;
-		const PageTable::flags_t m_flags;
+		PageTable::flags_t m_flags;
+		const int m_status_flags;
 		vaddr_t m_vaddr { 0 };
 		size_t m_physical_page_count { 0 };
 

kernel/include/kernel/Memory/SharedMemoryObject.h

@@ -6,6 +6,8 @@
 #include <kernel/Lock/SpinLock.h>
 #include <kernel/Memory/MemoryRegion.h>
 
+#include <fcntl.h>
+
 namespace Kernel
 {
 
@@ -55,15 +57,16 @@ namespace Kernel
 	public:
 		static BAN::ErrorOr<BAN::UniqPtr<SharedMemoryObject>> create(BAN::RefPtr<SharedMemoryObjectManager::Object>, PageTable&, AddressRange);
 
-		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override;
-		virtual BAN::ErrorOr<void> msync(vaddr_t, size_t, int) override { return {}; }
+		BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override;
+
+		BAN::ErrorOr<void> msync(vaddr_t, size_t, int) override { return {}; }
 
 	protected:
-		virtual BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override;
+		BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override;
 
 	private:
 		SharedMemoryObject(BAN::RefPtr<SharedMemoryObjectManager::Object> object, PageTable& page_table)
-			: MemoryRegion(page_table, object->size, MemoryRegion::Type::SHARED, object->flags)
+			: MemoryRegion(page_table, object->size, MemoryRegion::Type::SHARED, object->flags, O_EXEC | O_RDWR)
 			, m_object(object)
 		{ }
 

kernel/include/kernel/Memory/VirtualRange.h

@@ -38,7 +38,7 @@ namespace Kernel
 
 		bool contains(vaddr_t address) const { return vaddr() <= address && address < vaddr() + size(); }
 
-		BAN::ErrorOr<void> allocate_page_for_demand_paging(vaddr_t address);
+		BAN::ErrorOr<bool> allocate_page_for_demand_paging(vaddr_t address);
 
 	private:
 		VirtualRange(PageTable&, bool preallocated, bool has_guard_pages, vaddr_t, size_t, PageTable::flags_t);

kernel/include/kernel/Process.h

@@ -161,6 +161,8 @@ namespace Kernel
 
 		BAN::ErrorOr<long> sys_sync(bool should_block);
 
+		BAN::ErrorOr<long> sys_get_nprocessor();
+
 		static BAN::ErrorOr<long> clean_poweroff(int command);
 		BAN::ErrorOr<long> sys_poweroff(int command);
 
@@ -168,13 +170,14 @@ namespace Kernel
 
 		BAN::ErrorOr<long> sys_mmap(const sys_mmap_t*);
 		BAN::ErrorOr<long> sys_munmap(void* addr, size_t len);
+		BAN::ErrorOr<long> sys_mprotect(void* addr, size_t len, int prot);
 		BAN::ErrorOr<long> sys_msync(void* addr, size_t len, int flags);
 
 		BAN::ErrorOr<long> sys_smo_create(size_t len, int prot);
 		BAN::ErrorOr<long> sys_smo_delete(SharedMemoryObjectManager::Key);
 		BAN::ErrorOr<long> sys_smo_map(SharedMemoryObjectManager::Key);
 
-		BAN::ErrorOr<long> sys_ttyname(int fildes, char* storage);
+		BAN::ErrorOr<long> sys_ttyname(int fildes, char* name, size_t namesize);
 		BAN::ErrorOr<long> sys_isatty(int fildes);
 		BAN::ErrorOr<long> sys_posix_openpt(int flags);
 		BAN::ErrorOr<long> sys_ptsname(int fildes, char* buffer, size_t buffer_len);
@@ -187,6 +190,7 @@ namespace Kernel
 		BAN::ErrorOr<long> sys_sigpending(sigset_t* set);
 		BAN::ErrorOr<long> sys_sigprocmask(int how, const sigset_t* set, sigset_t* oset);
 
+		BAN::ErrorOr<long> sys_futex(int op, const uint32_t* addr, uint32_t val, const timespec* abstime);
 		BAN::ErrorOr<long> sys_yield();
 		BAN::ErrorOr<long> sys_set_tls(void*);
 		BAN::ErrorOr<long> sys_get_tls();
@@ -218,7 +222,7 @@ namespace Kernel
 		// Returns error if page could not be allocated
 		// Returns true if the page was allocated successfully
 		// Return false if access was page violation (segfault)
-		BAN::ErrorOr<bool> allocate_page_for_demand_paging(vaddr_t addr, bool wants_write);
+		BAN::ErrorOr<bool> allocate_page_for_demand_paging(vaddr_t addr, bool wants_write, bool wants_exec);
 
 		// FIXME: remove this API
 		BAN::ErrorOr<BAN::String> absolute_path_of(BAN::StringView) const;
@@ -335,6 +339,14 @@ namespace Kernel
 		BAN::UniqPtr<PageTable> m_page_table;
 		BAN::RefPtr<TTY> m_controlling_terminal;
 
+		struct futex_t
+		{
+			ThreadBlocker blocker;
+			uint32_t waiters { 0 };
+			uint32_t to_wakeup { 0 };
+		};
+		BAN::HashMap<paddr_t, BAN::UniqPtr<futex_t>> m_futexes;
+
 		friend class Thread;
 	};
 

kernel/kernel/BootInfo.cpp

@@ -1,5 +1,6 @@
 #include <kernel/BootInfo.h>
 #include <kernel/BananBootloader.h>
+#include <kernel/multiboot.h>
 #include <kernel/multiboot2.h>
 
 namespace Kernel
@@ -20,6 +21,70 @@ namespace Kernel
 		return MemoryMapEntry::Type::Reserved;
 	}
 
+	static void parse_boot_info_multiboot(uint32_t info)
+	{
+		const auto& multiboot_info = *reinterpret_cast<const multiboot_info_t*>(info);
+
+		if (multiboot_info.flags & MULTIBOOT_FLAGS_CMDLINE)
+		{
+			MUST(g_boot_info.command_line.append(reinterpret_cast<const char*>(multiboot_info.cmdline)));
+		}
+
+		if (multiboot_info.flags & MULTIBOOT_FLAGS_MODULES)
+		{
+			for (size_t i = 0; i < multiboot_info.mods_count; i++)
+			{
+				const auto& module = reinterpret_cast<const multiboot_module_t*>(multiboot_info.mods_addr)[i];
+				MUST(g_boot_info.modules.emplace_back(module.mod_start, module.mod_end - module.mod_start));
+			}
+		}
+
+		if (multiboot_info.flags & MULTIBOOT_FLAGS_MMAP)
+		{
+			uintptr_t address = multiboot_info.mmap_addr;
+			while (address < multiboot_info.mmap_addr + multiboot_info.mmap_length)
+			{
+				const auto& mmap_entry = *reinterpret_cast<const multiboot_mmap_t*>(address);
+				dprintln("entry {16H} {16H} {8H}",
+					(uint64_t)mmap_entry.base_addr,
+					(uint64_t)mmap_entry.length,
+					(uint64_t)mmap_entry.type
+				);
+				MUST(g_boot_info.memory_map_entries.push_back({
+					.address = mmap_entry.base_addr,
+					.length  = mmap_entry.length,
+					.type    = bios_number_to_memory_type(mmap_entry.type),
+				}));
+				address += mmap_entry.size + sizeof(mmap_entry.size);
+			}
+		}
+
+		if (multiboot_info.flags & MULTIBOOT_FLAGS_FRAMEBUFFER)
+		{
+			g_boot_info.framebuffer.address	= multiboot_info.framebuffer_addr;
+			g_boot_info.framebuffer.pitch	= multiboot_info.framebuffer_pitch;
+			g_boot_info.framebuffer.width	= multiboot_info.framebuffer_width;
+			g_boot_info.framebuffer.height	= multiboot_info.framebuffer_height;
+			g_boot_info.framebuffer.bpp		= multiboot_info.framebuffer_bpp;
+			if (multiboot_info.framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_RGB)
+				g_boot_info.framebuffer.type = FramebufferInfo::Type::RGB;
+			else if (multiboot_info.framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_TEXT)
+				g_boot_info.framebuffer.type = FramebufferInfo::Type::Text;
+			else
+				g_boot_info.framebuffer.type = FramebufferInfo::Type::Unknown;
+		}
+
+		g_boot_info.kernel_paddr = 0;
+	}
+
+	static BAN::StringView get_early_boot_command_line_multiboot(uint32_t info)
+	{
+		const auto& multiboot_info = *reinterpret_cast<const multiboot_info_t*>(info);
+		if (!(multiboot_info.flags & MULTIBOOT_FLAGS_CMDLINE))
+			return ""_sv;
+		return BAN::StringView(reinterpret_cast<const char*>(multiboot_info.cmdline));
+	}
+
 	static void parse_boot_info_multiboot2(uint32_t info)
 	{
 		const auto& multiboot2_info = *reinterpret_cast<const multiboot2_info_t*>(info);
@@ -149,17 +214,23 @@ namespace Kernel
 
 	bool validate_boot_magic(uint32_t magic)
 	{
-		if (magic == MULTIBOOT2_MAGIC)
-			return true;
-		if (magic == BANAN_BOOTLOADER_MAGIC)
+		switch (magic)
+		{
+			case MULTIBOOT_MAGIC:
+			case MULTIBOOT2_MAGIC:
+			case BANAN_BOOTLOADER_MAGIC:
 				return true;
+			default:
 				return false;
 		}
+	}
 
 	void parse_boot_info(uint32_t magic, uint32_t info)
 	{
 		switch (magic)
 		{
+			case MULTIBOOT_MAGIC:
+				return parse_boot_info_multiboot(info);
 			case MULTIBOOT2_MAGIC:
 				return parse_boot_info_multiboot2(info);
 			case BANAN_BOOTLOADER_MAGIC:
@@ -172,6 +243,8 @@ namespace Kernel
 	{
 		switch (magic)
 		{
+			case MULTIBOOT_MAGIC:
+				return get_early_boot_command_line_multiboot(info);
 			case MULTIBOOT2_MAGIC:
 				return get_early_boot_command_line_multiboot2(info);
 			case BANAN_BOOTLOADER_MAGIC:

kernel/kernel/Device/FramebufferDevice.cpp

@@ -241,9 +241,9 @@ namespace Kernel
 	class FramebufferMemoryRegion : public MemoryRegion
 	{
 	public:
-		static BAN::ErrorOr<BAN::UniqPtr<FramebufferMemoryRegion>> create(PageTable& page_table, size_t size, AddressRange address_range, MemoryRegion::Type region_type, PageTable::flags_t page_flags, BAN::RefPtr<FramebufferDevice> framebuffer)
+		static BAN::ErrorOr<BAN::UniqPtr<FramebufferMemoryRegion>> create(PageTable& page_table, size_t size, AddressRange address_range, MemoryRegion::Type region_type, PageTable::flags_t page_flags, int status_flags, BAN::RefPtr<FramebufferDevice> framebuffer)
 		{
-			auto* region_ptr = new FramebufferMemoryRegion(page_table, size, region_type, page_flags, framebuffer);
+			auto* region_ptr = new FramebufferMemoryRegion(page_table, size, region_type, page_flags, status_flags, framebuffer);
 			if (region_ptr == nullptr)
 				return BAN::Error::from_errno(ENOMEM);
 			auto region = BAN::UniqPtr<FramebufferMemoryRegion>::adopt(region_ptr);
@@ -258,7 +258,7 @@ namespace Kernel
 			m_framebuffer->sync_pixels_full();
 		}
 
-		virtual BAN::ErrorOr<void> msync(vaddr_t vaddr, size_t size, int flags) override
+		BAN::ErrorOr<void> msync(vaddr_t vaddr, size_t size, int flags) override
 		{
 			if (flags != MS_SYNC)
 				return BAN::Error::from_errno(ENOTSUP);
@@ -281,9 +281,9 @@ namespace Kernel
 			return {};
 		}
 
-		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override
+		BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override
 		{
-			auto* region_ptr = new FramebufferMemoryRegion(new_page_table, m_size, m_type, m_flags, m_framebuffer);
+			auto* region_ptr = new FramebufferMemoryRegion(new_page_table, m_size, m_type, m_flags, m_status_flags, m_framebuffer);
 			if (region_ptr == nullptr)
 				return BAN::Error::from_errno(ENOMEM);
 			auto region = BAN::UniqPtr<FramebufferMemoryRegion>::adopt(region_ptr);
@@ -297,7 +297,7 @@ namespace Kernel
 		// Returns error if no memory was available
 		// Returns true if page was succesfully allocated
 		// Returns false if page was already allocated
-		virtual BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override
+		BAN::ErrorOr<bool> allocate_page_containing_impl(vaddr_t vaddr, bool wants_write) override
 		{
 			(void)wants_write;
 
@@ -312,8 +312,8 @@ namespace Kernel
 		}
 
 	private:
-		FramebufferMemoryRegion(PageTable& page_table, size_t size, MemoryRegion::Type region_type, PageTable::flags_t page_flags, BAN::RefPtr<FramebufferDevice> framebuffer)
-			: MemoryRegion(page_table, size, region_type, page_flags)
+		FramebufferMemoryRegion(PageTable& page_table, size_t size, MemoryRegion::Type region_type, PageTable::flags_t page_flags, int status_flags, BAN::RefPtr<FramebufferDevice> framebuffer)
+			: MemoryRegion(page_table, size, region_type, page_flags, status_flags)
 			, m_framebuffer(framebuffer)
 		{ }
 
@@ -370,7 +370,7 @@ namespace Kernel
 		BAN::RefPtr<FramebufferDevice> m_framebuffer;
 	};
 
-	BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> FramebufferDevice::mmap_region(PageTable& page_table, off_t offset, size_t len, AddressRange address_range, MemoryRegion::Type region_type, PageTable::flags_t page_flags)
+	BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> FramebufferDevice::mmap_region(PageTable& page_table, off_t offset, size_t len, AddressRange address_range, MemoryRegion::Type region_type, PageTable::flags_t page_flags, int status_flags)
 	{
 		if (offset != 0)
 			return BAN::Error::from_errno(EINVAL);
@@ -379,7 +379,7 @@ namespace Kernel
 		if (region_type != MemoryRegion::Type::SHARED)
 			return BAN::Error::from_errno(EINVAL);
 
-		auto region = TRY(FramebufferMemoryRegion::create(page_table, len, address_range, region_type, page_flags, this));
+		auto region = TRY(FramebufferMemoryRegion::create(page_table, len, address_range, region_type, page_flags, status_flags, this));
 		return BAN::UniqPtr<MemoryRegion>(BAN::move(region));
 	}
 

kernel/kernel/ELF.cpp

@@ -212,7 +212,7 @@ namespace Kernel::ELF
 					file_backed_size,
 					{ .start = pheader_base, .end = pheader_base + file_backed_size },
 					MemoryRegion::Type::PRIVATE,
-					flags
+					flags, O_EXEC | O_RDWR
 				));
 				TRY(memory_regions.emplace_back(BAN::move(region)));
 			}
@@ -226,7 +226,7 @@ namespace Kernel::ELF
 					(pheader_base + program_header.p_memsz) - (aligned_vaddr + file_backed_size),
 					{ .start = aligned_vaddr + file_backed_size, .end = pheader_base + program_header.p_memsz },
 					MemoryRegion::Type::PRIVATE,
-					flags
+					flags, O_EXEC | O_RDWR
 				));
 
 				if (file_backed_size < program_header.p_filesz)
@@ -267,7 +267,8 @@ namespace Kernel::ELF
 				offset + region_size,
 				{ .start = last_loaded_address, .end = USERSPACE_END },
 				MemoryRegion::Type::PRIVATE,
-				PageTable::Flags::UserSupervisor | PageTable::Flags::Present
+				PageTable::Flags::UserSupervisor | PageTable::Flags::Present,
+				O_EXEC | O_RDWR
 			));
 
 			for (vaddr_t vaddr = region->vaddr(); vaddr < region->vaddr() + offset + region->size(); vaddr += PAGE_SIZE)

kernel/kernel/FS/ProcFS/FileSystem.cpp

@@ -1,3 +1,4 @@
+#include <kernel/BootInfo.h>
 #include <kernel/FS/ProcFS/FileSystem.h>
 #include <kernel/FS/ProcFS/Inode.h>
 
@@ -33,6 +34,10 @@ namespace Kernel
 			*s_instance, 0444, 0, 0
 		));
 		MUST(static_cast<TmpDirectoryInode*>(s_instance->root_inode().ptr())->link_inode(*meminfo_inode, "meminfo"_sv));
+
+		auto cmdline_inode = MUST(TmpFileInode::create_new(*s_instance, 0444, 0, 0));
+		MUST(cmdline_inode->write(0, { reinterpret_cast<const uint8_t*>(g_boot_info.command_line.data()), g_boot_info.command_line.size() }));
+		MUST(static_cast<TmpDirectoryInode*>(s_instance->root_inode().ptr())->link_inode(*cmdline_inode, "cmdline"_sv));
 	}
 
 	ProcFileSystem& ProcFileSystem::get()

kernel/kernel/FS/USTARModule.cpp

@@ -109,7 +109,8 @@ namespace Kernel
 
 			if (file_type == DIRTYPE)
 			{
-				TRY(parent_inode->create_directory(file_name_sv, file_mode, file_uid, file_gid));
+				if (auto ret = parent_inode->create_directory(file_name_sv, file_mode, file_uid, file_gid); ret.is_error())
+					dwarnln("failed to create directory '{}': {}", file_name_sv, ret.error());
 			}
 			else if (file_type == LNKTYPE)
 			{
@@ -117,8 +118,10 @@ namespace Kernel
 			}
 			else if (file_type == SYMTYPE)
 			{
-				TRY(parent_inode->create_file(file_name_sv, file_mode, file_uid, file_gid));
-
+				if (auto ret = parent_inode->create_file(file_name_sv, file_mode, file_uid, file_gid); ret.is_error())
+					dwarnln("failed to create symlink '{}': {}", file_name_sv, ret.error());
+				else
+				{
 					char link_target[101] {};
 					const paddr_t paddr = module.start + offset;
 					PageTable::with_fast_page(paddr & PAGE_ADDR_MASK, [&] {
@@ -131,10 +134,13 @@ namespace Kernel
 						TRY(inode->set_link_target(link_target));
 					}
 				}
+			}
+			else
+			{
+				if (auto ret = parent_inode->create_file(file_name_sv, file_mode, file_uid, file_gid); ret.is_error())
+					dwarnln("failed to create file '{}': {}", file_name_sv, ret.error());
 				else
 				{
-				TRY(parent_inode->create_file(file_name_sv, file_mode, file_uid, file_gid));
-
 					if (file_size)
 					{
 						auto inode = TRY(parent_inode->find_inode(file_name_sv));
@@ -154,6 +160,7 @@ namespace Kernel
 						}
 					}
 				}
+			}
 
 			offset += 512 + file_size;
 			if (auto rem = offset % 512)

kernel/kernel/IDT.cpp

@@ -188,6 +188,26 @@ namespace Kernel
 
 			if (isr == ISR::PageFault && Thread::current().is_userspace())
 			{
+				if (pid)
+				{
+					PageFaultError page_fault_error;
+					page_fault_error.raw = error;
+
+					Processor::set_interrupt_state(InterruptState::Enabled);
+					auto result = Process::current().allocate_page_for_demand_paging(regs->cr2, page_fault_error.write, page_fault_error.instruction);
+					Processor::set_interrupt_state(InterruptState::Disabled);
+
+					if (!result.is_error() && result.value())
+						goto done;
+
+					if (result.is_error())
+					{
+						dwarnln("Demand paging: {}", result.error());
+						Thread::current().handle_signal(SIGKILL);
+						goto done;
+					}
+				}
+
 				// Check if stack is OOB
 				if (ARCH(i686) && !GDT::is_user_segment(interrupt_stack->cs))
 					; // 32 bit does not push stack pointer when no CPL change happens
@@ -207,26 +227,6 @@ namespace Kernel
 					Thread::current().handle_signal(SIGKILL);
 					goto done;
 				}
-
-				if (pid)
-				{
-					PageFaultError page_fault_error;
-					page_fault_error.raw = error;
-
-					Processor::set_interrupt_state(InterruptState::Enabled);
-					auto result = Process::current().allocate_page_for_demand_paging(regs->cr2, page_fault_error.write);
-					Processor::set_interrupt_state(InterruptState::Disabled);
-
-					if (!result.is_error() && result.value())
-						goto done;
-
-					if (result.is_error())
-					{
-						dwarnln("Demand paging: {}", result.error());
-						Thread::current().handle_signal(SIGKILL);
-						goto done;
-					}
-				}
 			}
 		}
 
@@ -338,6 +338,7 @@ namespace Kernel
 		ASSERT(InterruptController::get().is_in_service(IRQ_IPI - IRQ_VECTOR_BASE));
 		InterruptController::get().eoi(IRQ_IPI - IRQ_VECTOR_BASE);
 		Processor::handle_ipi();
+		Processor::scheduler().reschedule_if_idle();
 	}
 
 	extern "C" void cpp_timer_handler()

kernel/kernel/Memory/FileBackedRegion.cpp

@@ -7,7 +7,7 @@
 namespace Kernel
 {
 
-	BAN::ErrorOr<BAN::UniqPtr<FileBackedRegion>> FileBackedRegion::create(BAN::RefPtr<Inode> inode, PageTable& page_table, off_t offset, size_t size, AddressRange address_range, Type type, PageTable::flags_t flags)
+	BAN::ErrorOr<BAN::UniqPtr<FileBackedRegion>> FileBackedRegion::create(BAN::RefPtr<Inode> inode, PageTable& page_table, off_t offset, size_t size, AddressRange address_range, Type type, PageTable::flags_t flags, int status_flags)
 	{
 		ASSERT(inode->mode().ifreg());
 
@@ -16,14 +16,14 @@ namespace Kernel
 		if ((size > (size_t)inode->size() || (size_t)offset > (size_t)inode->size() - size))
 			return BAN::Error::from_errno(EOVERFLOW);
 
-		auto* region_ptr = new FileBackedRegion(inode, page_table, offset, size, type, flags);
+		auto* region_ptr = new FileBackedRegion(inode, page_table, offset, size, type, flags, status_flags);
 		if (region_ptr == nullptr)
 			return BAN::Error::from_errno(ENOMEM);
 		auto region = BAN::UniqPtr<FileBackedRegion>::adopt(region_ptr);
 
 		TRY(region->initialize(address_range));
 
-		if (type == Type::PRIVATE && (flags & PageTable::Flags::ReadWrite))
+		if (type == Type::PRIVATE)
 			TRY(region->m_dirty_pages.resize(BAN::Math::div_round_up<size_t>(size, PAGE_SIZE)));
 
 		LockGuard _(inode->m_mutex);
@@ -39,8 +39,8 @@ namespace Kernel
 		return region;
 	}
 
-	FileBackedRegion::FileBackedRegion(BAN::RefPtr<Inode> inode, PageTable& page_table, off_t offset, ssize_t size, Type type, PageTable::flags_t flags)
-		: MemoryRegion(page_table, size, type, flags)
+	FileBackedRegion::FileBackedRegion(BAN::RefPtr<Inode> inode, PageTable& page_table, off_t offset, ssize_t size, Type type, PageTable::flags_t flags, int status_flags)
+		: MemoryRegion(page_table, size, type, flags, status_flags)
 		, m_inode(inode)
 		, m_offset(offset)
 	{
@@ -200,7 +200,7 @@ namespace Kernel
 	BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> FileBackedRegion::clone(PageTable& page_table)
 	{
 		const size_t aligned_size = (m_size + PAGE_SIZE - 1) & PAGE_ADDR_MASK;
-		auto result = TRY(FileBackedRegion::create(m_inode, page_table, m_offset, m_size, { .start = m_vaddr, .end = m_vaddr + aligned_size }, m_type, m_flags));
+		auto result = TRY(FileBackedRegion::create(m_inode, page_table, m_offset, m_size, { .start = m_vaddr, .end = m_vaddr + aligned_size }, m_type, m_flags, m_status_flags));
 
 		// non-dirty pages can go through demand paging
 

kernel/kernel/Memory/MemoryBackedRegion.cpp

@@ -4,12 +4,12 @@
 namespace Kernel
 {
 
-	BAN::ErrorOr<BAN::UniqPtr<MemoryBackedRegion>> MemoryBackedRegion::create(PageTable& page_table, size_t size, AddressRange address_range, Type type, PageTable::flags_t flags)
+	BAN::ErrorOr<BAN::UniqPtr<MemoryBackedRegion>> MemoryBackedRegion::create(PageTable& page_table, size_t size, AddressRange address_range, Type type, PageTable::flags_t flags, int status_flags)
 	{
 		if (type != Type::PRIVATE)
 			return BAN::Error::from_errno(ENOTSUP);
 
-		auto* region_ptr = new MemoryBackedRegion(page_table, size, type, flags);
+		auto* region_ptr = new MemoryBackedRegion(page_table, size, type, flags, status_flags);
 		if (region_ptr == nullptr)
 			return BAN::Error::from_errno(ENOMEM);
 		auto region = BAN::UniqPtr<MemoryBackedRegion>::adopt(region_ptr);
@@ -19,8 +19,8 @@ namespace Kernel
 		return region;
 	}
 
-	MemoryBackedRegion::MemoryBackedRegion(PageTable& page_table, size_t size, Type type, PageTable::flags_t flags)
-		: MemoryRegion(page_table, size, type, flags)
+	MemoryBackedRegion::MemoryBackedRegion(PageTable& page_table, size_t size, Type type, PageTable::flags_t flags, int status_flags)
+		: MemoryRegion(page_table, size, type, flags, status_flags)
 	{
 	}
 
@@ -68,7 +68,7 @@ namespace Kernel
 		ASSERT(&PageTable::current() == &m_page_table);
 
 		const size_t aligned_size = (m_size + PAGE_SIZE - 1) & PAGE_ADDR_MASK;
-		auto result = TRY(MemoryBackedRegion::create(new_page_table, m_size, { .start = m_vaddr, .end = m_vaddr + aligned_size }, m_type, m_flags));
+		auto result = TRY(MemoryBackedRegion::create(new_page_table, m_size, { .start = m_vaddr, .end = m_vaddr + aligned_size }, m_type, m_flags, m_status_flags));
 
 		for (size_t offset = 0; offset < m_size; offset += PAGE_SIZE)
 		{

kernel/kernel/Memory/MemoryRegion.cpp

@@ -4,11 +4,12 @@
 namespace Kernel
 {
 
-	MemoryRegion::MemoryRegion(PageTable& page_table, size_t size, Type type, PageTable::flags_t flags)
+	MemoryRegion::MemoryRegion(PageTable& page_table, size_t size, Type type, PageTable::flags_t flags, int status_flags)
 		: m_page_table(page_table)
 		, m_size(size)
 		, m_type(type)
 		, m_flags(flags)
+		, m_status_flags(status_flags)
 	{
 	}
 
@@ -49,6 +50,25 @@ namespace Kernel
 		return true;
 	}
 
+	BAN::ErrorOr<void> MemoryRegion::mprotect(PageTable::flags_t new_page_flags)
+	{
+		if (m_flags == new_page_flags)
+			return {};
+
+		const size_t page_count = BAN::Math::div_round_up<size_t>(m_size, PAGE_SIZE);
+		for (size_t i = 0; i < page_count; i++)
+		{
+			const vaddr_t vaddr = m_vaddr + i * PAGE_SIZE;
+			const paddr_t paddr = m_page_table.physical_address_of(vaddr);
+			if (paddr == 0)
+				continue;
+			m_page_table.map_page_at(paddr, vaddr, new_page_flags);
+		}
+
+		m_flags = new_page_flags;
+		return {};
+	}
+
 	BAN::ErrorOr<bool> MemoryRegion::allocate_page_containing(vaddr_t address, bool wants_write)
 	{
 		ASSERT(contains(address));

kernel/kernel/Memory/VirtualRange.cpp

@@ -99,7 +99,7 @@ namespace Kernel
 		else
 		{
 			const size_t page_count = size() / PAGE_SIZE;
-			for (size_t i = m_has_guard_pages; i < page_count; i++)
+			for (size_t i = 0; i < page_count; i++)
 			{
 				PageTable::with_fast_page(m_paddrs[i], [&] {
 					memset(PageTable::fast_page_as_ptr(), 0, PAGE_SIZE);
@@ -120,7 +120,7 @@ namespace Kernel
 		auto result = TRY(create_to_vaddr(page_table, vaddr(), size(), m_flags, m_preallocated, m_has_guard_pages));
 
 		const size_t page_count = size() / PAGE_SIZE;
-		for (size_t i = m_has_guard_pages; i < page_count; i++)
+		for (size_t i = 0; i < page_count; i++)
 		{
 			if (m_paddrs[i] == 0)
 				continue;
@@ -140,15 +140,17 @@ namespace Kernel
 		return result;
 	}
 
-	BAN::ErrorOr<void> VirtualRange::allocate_page_for_demand_paging(vaddr_t vaddr)
+	BAN::ErrorOr<bool> VirtualRange::allocate_page_for_demand_paging(vaddr_t vaddr)
 	{
-		ASSERT(!m_preallocated);
-		ASSERT(vaddr % PAGE_SIZE == 0);
 		ASSERT(contains(vaddr));
 		ASSERT(&PageTable::current() == &m_page_table);
 
+		if (m_preallocated)
+			return false;
+
 		const size_t index = (vaddr - this->vaddr()) / PAGE_SIZE;
-		ASSERT(m_paddrs[index] == 0);
+		if (m_paddrs[index])
+			return false;
 
 		SpinLockGuard _(m_lock);
 
@@ -159,7 +161,7 @@ namespace Kernel
 		m_page_table.map_page_at(m_paddrs[index], vaddr, m_flags);
 		memset(reinterpret_cast<void*>(vaddr), 0, PAGE_SIZE);
 
-		return {};
+		return true;
 	}
 
 }

kernel/kernel/Networking/NetworkInterface.cpp

@@ -29,17 +29,16 @@ namespace Kernel
 		, m_type(type)
 		, m_rdev(get_rdev(type))
 	{
-		ASSERT(minor(m_rdev) < 10);
-
 		switch (type)
 		{
 			case Type::Ethernet:
+				ASSERT(minor(m_rdev) < 10);
 				strcpy(m_name, "ethx");
 				m_name[3] = minor(m_rdev) + '0';
 				break;
 			case Type::Loopback:
-				strcpy(m_name, "lox");
-				m_name[2] = minor(m_rdev) + '0';
+				ASSERT(minor(m_rdev) == 0);
+				strcpy(m_name, "lo");
 				break;
 		}
 	}

kernel/kernel/OpenFileDescriptorSet.cpp

@@ -429,6 +429,8 @@ namespace Kernel
 		size_t nread;
 		{
 			LockGuard _(inode->m_mutex);
+			if (!inode->can_read() && inode->has_hungup())
+				return 0;
 			if (is_nonblock && !inode->can_read())
 				return BAN::Error::from_errno(EAGAIN);
 			nread = TRY(inode->read(offset, buffer));
@@ -464,6 +466,11 @@ namespace Kernel
 		size_t nwrite;
 		{
 			LockGuard _(inode->m_mutex);
+			if (inode->has_error())
+			{
+				Thread::current().add_signal(SIGPIPE);
+				return BAN::Error::from_errno(EPIPE);
+			}
 			if (is_nonblock && !inode->can_write())
 				return BAN::Error::from_errno(EAGAIN);
 			nwrite = TRY(inode->write(offset, buffer));

kernel/kernel/Process.cpp

@@ -26,6 +26,7 @@
 #include <pthread.h>
 #include <stdio.h>
 #include <sys/banan-os.h>
+#include <sys/futex.h>
 #include <sys/sysmacros.h>
 #include <sys/wait.h>
 
@@ -317,7 +318,8 @@ namespace Kernel
 			tls_size,
 			{ .start = master_addr, .end = USERSPACE_END },
 			MemoryRegion::Type::PRIVATE,
-			PageTable::Flags::UserSupervisor | PageTable::Flags::ReadWrite | PageTable::Flags::Present
+			PageTable::Flags::UserSupervisor | PageTable::Flags::ReadWrite | PageTable::Flags::Present,
+			O_EXEC | O_RDWR
 		));
 
 		BAN::Vector<uint8_t> temp_buffer;
@@ -981,24 +983,32 @@ namespace Kernel
 		return {};
 	}
 
-	BAN::ErrorOr<bool> Process::allocate_page_for_demand_paging(vaddr_t address, bool wants_write)
+	BAN::ErrorOr<bool> Process::allocate_page_for_demand_paging(vaddr_t address, bool wants_write, bool wants_exec)
 	{
 		ASSERT(&Process::current() == this);
 
 		LockGuard _(m_process_lock);
 
-		if (Thread::current().userspace_stack().contains(address))
 		{
-			TRY(Thread::current().userspace_stack().allocate_page_for_demand_paging(address));
+			// NOTE: page can be already allocated by another thread!
+
+			PageTable::flags_t wanted_flags = PageTable::Flags::UserSupervisor | PageTable::Flags::Present;
+			if (wants_write)
+				wanted_flags |= PageTable::Flags::ReadWrite;
+			if (wants_exec)
+				wanted_flags |= PageTable::Flags::Execute;
+			if ((m_page_table->get_page_flags(address & PAGE_ADDR_MASK) & wanted_flags) == wanted_flags)
 				return true;
 		}
 
+		if (Thread::current().userspace_stack().contains(address))
+			return Thread::current().userspace_stack().allocate_page_for_demand_paging(address);
+
 		for (auto& region : m_mapped_regions)
 		{
 			if (!region->contains(address))
 				continue;
-			TRY(region->allocate_page_containing(address, wants_write));
-			return true;
+			return region->allocate_page_containing(address, wants_write);
 		}
 
 		return false;
@@ -2011,6 +2021,11 @@ namespace Kernel
 		return 0;
 	}
 
+	BAN::ErrorOr<long> Process::sys_get_nprocessor()
+	{
+		return Processor::count();
+	}
+
 	[[noreturn]] static void reset_system()
 	{
 		(void)ACPI::ACPI::get().reset();
@@ -2132,7 +2147,8 @@ namespace Kernel
 				page_table(),
 				args.len,
 				address_range,
-				region_type, page_flags
+				region_type, page_flags,
+				O_EXEC | O_RDWR
 			));
 
 			LockGuard _(m_process_lock);
@@ -2159,7 +2175,8 @@ namespace Kernel
 				page_table(),
 				args.off, args.len,
 				address_range,
-				region_type, page_flags
+				region_type, page_flags,
+				status_flags
 			));
 		}
 		else if (inode->is_device())
@@ -2168,7 +2185,8 @@ namespace Kernel
 				page_table(),
 				args.off, args.len,
 				address_range,
-				region_type, page_flags
+				region_type, page_flags,
+				status_flags
 			));
 		}
 
@@ -2214,6 +2232,70 @@ namespace Kernel
 		return 0;
 	}
 
+	BAN::ErrorOr<long> Process::sys_mprotect(void* addr, size_t len, int prot)
+	{
+		if (len == 0)
+			return BAN::Error::from_errno(EINVAL);
+
+		const vaddr_t vaddr = reinterpret_cast<vaddr_t>(addr);
+		if (vaddr % PAGE_SIZE != 0)
+			return BAN::Error::from_errno(EINVAL);
+
+		if (auto rem = len % PAGE_SIZE)
+			len += PAGE_SIZE - rem;
+
+		PageTable::flags_t flags = 0;
+		if (prot & PROT_READ)
+			flags |= PageTable::Flags::Present;
+		if (prot & PROT_WRITE)
+			flags |= PageTable::Flags::ReadWrite | PageTable::Flags::Present;
+		if (prot & PROT_EXEC)
+			flags |= PageTable::Flags::Execute | PageTable::Flags::Execute;
+
+		if (flags == 0)
+			flags = PageTable::Flags::Reserved;
+		else
+			flags |= PageTable::Flags::UserSupervisor;
+
+		LockGuard _(m_process_lock);
+
+		// FIXME: We should protect partial regions.
+		//        This is a hack to only protect if the whole mmap region
+		//        is contained within [addr, addr + len]
+		for (size_t i = 0; i < m_mapped_regions.size(); i++)
+		{
+			auto& region = m_mapped_regions[i];
+
+			const vaddr_t region_s = region->vaddr();
+			const vaddr_t region_e = region->vaddr() + region->size();
+			if (vaddr <= region_s && region_e <= vaddr + len)
+			{
+				const bool is_shared   = (region->type() == MemoryRegion::Type::SHARED);
+				const bool is_writable = (region->status_flags() & O_WRONLY);
+				const bool want_write  = (prot & PROT_WRITE);
+				if (is_shared && want_write && !is_writable)
+					return BAN::Error::from_errno(EACCES);
+
+				// FIXME: if the region is pinned writable, this may
+				//        cause some problems :D
+				TRY(region->mprotect(flags));
+			}
+			else if (region->overlaps(vaddr, len))
+			{
+				const bool is_shared   = (region->type() == MemoryRegion::Type::SHARED);
+				const bool is_writable = (region->status_flags() & O_WRONLY);
+				const bool want_write  = (prot & PROT_WRITE);
+				if (is_shared && want_write && !is_writable)
+					return BAN::Error::from_errno(EACCES);
+
+				dwarnln("TODO: partial region mprotect");
+				TRY(region->mprotect(flags | region->flags()));
+			}
+		}
+
+		return 0;
+	}
+
 	BAN::ErrorOr<long> Process::sys_msync(void* addr, size_t len, int flags)
 	{
 		if (flags != MS_SYNC && flags != MS_ASYNC && flags != MS_INVALIDATE)
@@ -2270,17 +2352,17 @@ namespace Kernel
 		return m_mapped_regions.back()->vaddr();
 	}
 
-	BAN::ErrorOr<long> Process::sys_ttyname(int fildes, char* storage)
+	BAN::ErrorOr<long> Process::sys_ttyname(int fildes, char* name, size_t namesize)
 	{
 		LockGuard _(m_process_lock);
-		TRY(validate_pointer_access(storage, TTY_NAME_MAX, true));
+		TRY(validate_pointer_access(name, namesize, true));
 		auto inode = TRY(m_open_file_descriptors.inode_of(fildes));
 		if (!inode->is_tty())
 			return BAN::Error::from_errno(ENOTTY);
 		auto path = TRY(m_open_file_descriptors.path_of(fildes));
-		ASSERT(path.size() < TTY_NAME_MAX);
-		strncpy(storage, path.data(), path.size());
-		storage[path.size()] = '\0';
+		if (namesize < path.size() + 1)
+			return BAN::Error::from_errno(ERANGE);
+		strcpy(name, path.data());
 		return 0;
 	}
 
@@ -2491,14 +2573,7 @@ namespace Kernel
 			*oact = m_signal_handlers[signal];
 
 		if (act)
-		{
-			if (act->sa_flags & ~(SA_RESTART))
-			{
-				dwarnln("TODO: sigaction({}, {H})", signal, act->sa_flags);
-				return BAN::Error::from_errno(ENOTSUP);
-			}
 			m_signal_handlers[signal] = *act;
-		}
 
 		return 0;
 	}
@@ -2544,6 +2619,96 @@ namespace Kernel
 		return 0;
 	}
 
+	BAN::ErrorOr<long> Process::sys_futex(int op, const uint32_t* addr, uint32_t val, const timespec* abstime)
+	{
+		const vaddr_t vaddr = reinterpret_cast<vaddr_t>(addr);
+		if (vaddr % 4)
+			return BAN::Error::from_errno(EINVAL);
+
+		const bool is_private  = (op & FUTEX_PRIVATE);
+		const bool is_realtime = (op & FUTEX_REALTIME);
+		op &= ~(FUTEX_PRIVATE | FUTEX_REALTIME);
+
+		if (!is_private)
+		{
+			dwarnln("TODO: shared futex");
+			return BAN::Error::from_errno(ENOTSUP);
+		}
+
+		LockGuard _(m_process_lock);
+
+		auto* buffer_region = TRY(validate_and_pin_pointer_access(addr, sizeof(uint32_t), false));
+		BAN::ScopeGuard pin_guard([&] { if (buffer_region) buffer_region->unpin(); });
+
+		const paddr_t paddr = m_page_table->physical_address_of(vaddr & PAGE_ADDR_MASK) | (vaddr & ~PAGE_ADDR_MASK);
+		ASSERT(paddr != 0);
+
+		switch (op)
+		{
+			case FUTEX_WAIT:
+			{
+				if (BAN::atomic_load(*addr) != val)
+					return BAN::Error::from_errno(EAGAIN);
+
+				const uint64_t wake_time_ns =
+					TRY([abstime, is_realtime, this]() -> BAN::ErrorOr<uint64_t>
+					{
+						if (abstime == nullptr)
+							return BAN::numeric_limits<uint64_t>::max();
+						TRY(validate_pointer_access(abstime, sizeof(*abstime), false));
+						const uint64_t abs_ns = abstime->tv_sec * 1'000'000'000 + abstime->tv_nsec;
+						if (!is_realtime)
+							return abs_ns;
+						const auto realtime = SystemTimer::get().real_time();
+						const uint64_t real_ns = realtime.tv_sec * 1'000'000'000 + realtime.tv_nsec;
+						if (abs_ns <= real_ns)
+							return BAN::Error::from_errno(ETIMEDOUT);
+						return SystemTimer::get().ns_since_boot() + (abs_ns - real_ns);
+					}());
+
+				auto it = m_futexes.find(paddr);
+				if (it == m_futexes.end())
+					it = TRY(m_futexes.emplace(paddr, TRY(BAN::UniqPtr<futex_t>::create())));
+				futex_t* const futex = it->value.ptr();
+
+				futex->waiters++;
+				BAN::ScopeGuard _([futex, paddr, this] {
+					if (--futex->waiters == 0)
+						m_futexes.remove(paddr);
+				});
+
+				for (;;)
+				{
+					TRY(Thread::current().block_or_eintr_or_waketime_ns(futex->blocker, wake_time_ns, true, &m_process_lock));
+					if (BAN::atomic_load(*addr) == val || futex->to_wakeup == 0)
+						continue;
+					futex->to_wakeup--;
+					return 0;
+				}
+			}
+			case FUTEX_WAKE:
+			{
+				auto it = m_futexes.find(paddr);
+				if (it == m_futexes.end())
+					return 0;
+				futex_t* const futex = it->value.ptr();
+
+				if (BAN::Math::will_addition_overflow(futex->to_wakeup, val))
+					futex->to_wakeup = BAN::numeric_limits<uint32_t>::max();
+				else
+					futex->to_wakeup += val;
+
+				futex->to_wakeup = BAN::Math::min(futex->to_wakeup, futex->waiters);
+				futex->blocker.unblock();
+				return 0;
+			}
+			default:
+				return BAN::Error::from_errno(ENOSYS);
+		}
+
+		ASSERT_NOT_REACHED();
+	}
+
 	BAN::ErrorOr<long> Process::sys_yield()
 	{
 		Processor::yield();
@@ -3055,9 +3220,8 @@ namespace Kernel
 	BAN::ErrorOr<void> Process::validate_pointer_access_check(const void* ptr, size_t size, bool needs_write)
 	{
 		ASSERT(&Process::current() == this);
-		auto& thread = Thread::current();
 
-		vaddr_t vaddr = (vaddr_t)ptr;
+		const vaddr_t vaddr = reinterpret_cast<vaddr_t>(ptr);
 
 		// NOTE: detect overflow
 		if (vaddr + size < vaddr)
@@ -3067,14 +3231,12 @@ namespace Kernel
 		if (vaddr + size > USERSPACE_END)
 			goto unauthorized_access;
 
-		if (vaddr == 0)
-			return {};
-
-		if (vaddr >= thread.userspace_stack_bottom() && vaddr + size <= thread.userspace_stack_top())
+		for (const auto* thread : m_threads)
+			if (vaddr >= thread->userspace_stack_bottom() && vaddr + size <= thread->userspace_stack_top())
 				return {};
 
 		// FIXME: should we allow cross mapping access?
-		for (auto& mapped_region : m_mapped_regions)
+		for (const auto& mapped_region : m_mapped_regions)
 		{
 			if (!mapped_region->contains_fully(vaddr, size))
 				continue;
@@ -3107,7 +3269,7 @@ unauthorized_access:
 			const vaddr_t current = page_start + i * PAGE_SIZE;
 			if (page_table().get_page_flags(current) & PageTable::Flags::Present)
 				continue;
-			TRY(Process::allocate_page_for_demand_paging(current, needs_write));
+			TRY(Process::allocate_page_for_demand_paging(current, needs_write, false));
 		}
 
 		return {};

kernel/kernel/Thread.cpp

@@ -119,9 +119,15 @@ namespace Kernel
 
 		thread->m_is_userspace = true;
 
+#if ARCH(x86_64)
+		static constexpr vaddr_t stack_addr_start = 0x0000700000000000;
+#elif ARCH(i686)
+		static constexpr vaddr_t stack_addr_start = 0xB0000000;
+#endif
+
 		thread->m_kernel_stack = TRY(VirtualRange::create_to_vaddr_range(
 			page_table,
-			0x200000, USERSPACE_END,
+			stack_addr_start, USERSPACE_END,
 			kernel_stack_size,
 			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
 			true, true
@@ -129,7 +135,7 @@ namespace Kernel
 
 		thread->m_userspace_stack = TRY(VirtualRange::create_to_vaddr_range(
 			page_table,
-			0x200000, USERSPACE_END,
+			stack_addr_start, USERSPACE_END,
 			userspace_stack_size,
 			PageTable::Flags::UserSupervisor | PageTable::Flags::ReadWrite | PageTable::Flags::Present,
 			true, true
@@ -507,9 +513,16 @@ namespace Kernel
 		bool has_sa_restart;
 		{
 			SpinLockGuard _(m_process->m_signal_lock);
-			ASSERT(!(m_process->m_signal_handlers[signal].sa_flags & SA_SIGINFO));
-			signal_handler = (vaddr_t)m_process->m_signal_handlers[signal].sa_handler;
-			has_sa_restart = !!(m_process->m_signal_handlers[signal].sa_flags & SA_RESTART);
+
+			auto& handler = m_process->m_signal_handlers[signal];
+
+			ASSERT(!(handler.sa_flags & SA_SIGINFO));
+
+			signal_handler = reinterpret_cast<vaddr_t>(handler.sa_handler);
+			if (handler.sa_flags & SA_RESETHAND)
+				handler.sa_handler = SIG_DFL;
+
+			has_sa_restart = !!(handler.sa_flags & SA_RESTART);
 		}
 
 		m_signal_pending_mask &= ~(1ull << signal);

ports/SDL2/patches/0001-add-banan_os-support.patch

@@ -1,6 +1,6 @@
-diff -ruN SDL-release-2.30.11/CMakeLists.txt SDL-release-2.30.11-banan_os/CMakeLists.txt
+diff -ruN SDL-release-2.30.11/CMakeLists.txt SDL2-2.30.11-banan_os/CMakeLists.txt
 --- SDL-release-2.30.11/CMakeLists.txt	2025-01-01 19:09:38.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/CMakeLists.txt	2025-06-25 16:53:26.163363407 +0300
++++ SDL2-2.30.11-banan_os/CMakeLists.txt	2025-08-03 14:04:09.894244781 +0300
 @@ -1452,7 +1452,7 @@
    CheckPTHREAD()
    CheckLibUnwind()
@@ -60,9 +60,9 @@ diff -ruN SDL-release-2.30.11/CMakeLists.txt SDL-release-2.30.11-banan_os/CMakeL
  elseif(RISCOS)
    if(SDL_MISC)
      file(GLOB MISC_SOURCES ${SDL2_SOURCE_DIR}/src/misc/riscos/*.c)
-diff -ruN SDL-release-2.30.11/include/SDL_config.h.cmake SDL-release-2.30.11-banan_os/include/SDL_config.h.cmake
+diff -ruN SDL-release-2.30.11/include/SDL_config.h.cmake SDL2-2.30.11-banan_os/include/SDL_config.h.cmake
 --- SDL-release-2.30.11/include/SDL_config.h.cmake	2025-01-01 19:09:38.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/include/SDL_config.h.cmake	2025-06-24 19:53:27.963249565 +0300
++++ SDL2-2.30.11-banan_os/include/SDL_config.h.cmake	2025-08-03 14:04:09.894803585 +0300
 @@ -406,6 +406,7 @@
  #cmakedefine SDL_VIDEO_DRIVER_ANDROID @SDL_VIDEO_DRIVER_ANDROID@
  #cmakedefine SDL_VIDEO_DRIVER_EMSCRIPTEN @SDL_VIDEO_DRIVER_EMSCRIPTEN@
@@ -71,9 +71,9 @@ diff -ruN SDL-release-2.30.11/include/SDL_config.h.cmake SDL-release-2.30.11-ban
  #cmakedefine SDL_VIDEO_DRIVER_COCOA @SDL_VIDEO_DRIVER_COCOA@
  #cmakedefine SDL_VIDEO_DRIVER_UIKIT @SDL_VIDEO_DRIVER_UIKIT@
  #cmakedefine SDL_VIDEO_DRIVER_DIRECTFB @SDL_VIDEO_DRIVER_DIRECTFB@
-diff -ruN SDL-release-2.30.11/include/SDL_platform.h SDL-release-2.30.11-banan_os/include/SDL_platform.h
+diff -ruN SDL-release-2.30.11/include/SDL_platform.h SDL2-2.30.11-banan_os/include/SDL_platform.h
 --- SDL-release-2.30.11/include/SDL_platform.h	2025-01-01 19:09:38.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/include/SDL_platform.h	2025-06-24 17:54:20.094530618 +0300
++++ SDL2-2.30.11-banan_os/include/SDL_platform.h	2025-08-03 14:04:09.895022748 +0300
 @@ -36,6 +36,10 @@
  #undef __HAIKU__
  #define __HAIKU__   1
@@ -85,9 +85,9 @@ diff -ruN SDL-release-2.30.11/include/SDL_platform.h SDL-release-2.30.11-banan_o
  #if defined(bsdi) || defined(__bsdi) || defined(__bsdi__)
  #undef __BSDI__
  #define __BSDI__    1
-diff -ruN SDL-release-2.30.11/src/misc/banan_os/SDL_sysurl.cpp SDL-release-2.30.11-banan_os/src/misc/banan_os/SDL_sysurl.cpp
+diff -ruN SDL-release-2.30.11/src/misc/banan_os/SDL_sysurl.cpp SDL2-2.30.11-banan_os/src/misc/banan_os/SDL_sysurl.cpp
 --- SDL-release-2.30.11/src/misc/banan_os/SDL_sysurl.cpp	1970-01-01 02:00:00.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/src/misc/banan_os/SDL_sysurl.cpp	2025-06-24 18:51:56.695953622 +0300
++++ SDL2-2.30.11-banan_os/src/misc/banan_os/SDL_sysurl.cpp	2025-08-03 14:04:09.895198889 +0300
 @@ -0,0 +1,30 @@
 +/*
 +  Simple DirectMedia Layer
@@ -119,9 +119,9 @@ diff -ruN SDL-release-2.30.11/src/misc/banan_os/SDL_sysurl.cpp SDL-release-2.30.
 +
 +/* vi: set ts=4 sw=4 expandtab: */
 +
-diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.cpp SDL-release-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.cpp
+diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.cpp SDL2-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.cpp
 --- SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.cpp	1970-01-01 02:00:00.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.cpp	2025-06-27 16:29:59.012277213 +0300
++++ SDL2-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.cpp	2025-08-03 14:04:09.895299391 +0300
 @@ -0,0 +1,60 @@
 +/*
 +  Simple DirectMedia Layer
@@ -183,9 +183,9 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.cpp SD
 +#endif /* SDL_VIDEO_DRIVER_BANAN_OS */
 +
 +/* vi: set ts=4 sw=4 expandtab: */
-diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.h SDL-release-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.h
+diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.h SDL2-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.h
 --- SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.h	1970-01-01 02:00:00.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.h	2025-06-24 19:49:44.390183027 +0300
++++ SDL2-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_message_box.h	2025-08-03 14:04:09.895347931 +0300
 @@ -0,0 +1,45 @@
 +/*
 +  Simple DirectMedia Layer
@@ -232,10 +232,10 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_message_box.h SDL-
 +#endif
 +
 +/* vi: set ts=4 sw=4 expandtab: */
-diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-release-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_video.cpp
+diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL2-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_video.cpp
 --- SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp	1970-01-01 02:00:00.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_video.cpp	2025-06-28 20:49:41.452498550 +0300
-@@ -0,0 +1,770 @@
++++ SDL2-2.30.11-banan_os/src/video/banan_os/SDL_banan_os_video.cpp	2025-08-04 14:57:50.844360579 +0300
+@@ -0,0 +1,719 @@
 +/*
 +  Simple DirectMedia Layer
 +  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
@@ -291,8 +291,8 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +struct banan_os_window
 +{
 +	BAN::UniqPtr<LibGUI::Window> window;
-+	LibGUI::Texture framebuffer;
-+	OSMesaContext gl_context;
++	OSMesaContext gl_context { nullptr };
++	SDL_bool relative { SDL_FALSE };
 +};
 +
 +struct banan_os_video_device_data
@@ -442,6 +442,8 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +{
 +	DUMP_FUNCTION();
 +
++	// FIXME: support system cursors :)
++
 +	auto* cursor = static_cast<SDL_Cursor*>(SDL_calloc(1, sizeof(SDL_Cursor)));
 +	if (cursor == nullptr) {
 +		SDL_OutOfMemory();
@@ -473,12 +475,17 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +	return 0;
 +}
 +
-+static int BANAN_OS_CaptureMouse(SDL_Window* window)
++static int BANAN_OS_SetRelativeMouseMode(SDL_bool enabled)
 +{
 +	DUMP_FUNCTION();
 +
++	auto* window = SDL_GetMouseFocus();
++	if (window == nullptr)
++		return 0;
++
 +	auto& ban_window = *static_cast<banan_os_window*>(window->driverdata);
-+	ban_window.window->set_mouse_capture(SDL_GetMouse()->capture_window == window);
++	ban_window.window->set_mouse_relative(enabled);
++	ban_window.relative = enabled;
 +
 +	return 0;
 +}
@@ -489,9 +496,11 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +
 +	auto* mouse = SDL_GetMouse();
 +	mouse->ShowCursor = BANAN_OS_ShowCursor;
-+	mouse->CaptureMouse = BANAN_OS_CaptureMouse;
++	mouse->SetRelativeMouseMode = BANAN_OS_SetRelativeMouseMode;
 +	mouse->CreateSystemCursor = BANAN_OS_CreateSystemCursor;
 +	mouse->FreeCursor = BANAN_OS_FreeCursor;
++
++	SDL_SetDefaultCursor(BANAN_OS_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW));
 +}
 +
 +static int BANAN_OS_VideoInit(_THIS)
@@ -588,16 +597,16 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +	);
 +
 +	ban_window->window->set_mouse_button_event_callback(
-+		[window](LibGUI::EventPacket::MouseButtonEvent::event_t event) {
++		[window, ban_window](LibGUI::EventPacket::MouseButtonEvent::event_t event) {
 +			const int state = event.pressed ? SDL_PRESSED : SDL_RELEASED;
-+			SDL_SendMouseMotion(window, 0, SDL_FALSE, event.x, event.y);
++			SDL_SendMouseMotion(window, 0, ban_window->relative, event.x, event.y);
 +			SDL_SendMouseButton(window, 0, state, BANAN_OS_mouse_button_to_sdl(event.button));
 +		}	
 +	);
 +
 +	ban_window->window->set_mouse_move_event_callback(
-+		[window](LibGUI::EventPacket::MouseMoveEvent::event_t event) {
-+			SDL_SendMouseMotion(window, 0, SDL_FALSE, event.x, event.y);
++		[window, ban_window](LibGUI::EventPacket::MouseMoveEvent::event_t event) {
++			SDL_SendMouseMotion(window, 0, ban_window->relative, event.x, event.y);
 +		}
 +	);
 +
@@ -613,13 +622,13 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +			const size_t height = ban_window->window->height();
 +
 +			if (ban_window->gl_context) {
-+				ban_window->framebuffer = MUST(LibGUI::Texture::create(width, height, 0x000000));
 +				OSMesaMakeCurrent(
 +					ban_window->gl_context,
-+					ban_window->framebuffer.pixels().data(),
++					ban_window->window->texture().pixels().data(),
 +					GL_UNSIGNED_BYTE,
 +					width, height
 +				);
++				OSMesaPixelStore(OSMESA_Y_UP, 0);
 +			}
 +
 +			SDL_SendWindowEvent(window, SDL_WINDOWEVENT_RESIZED, width, height);
@@ -767,11 +776,9 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +		return -1;
 +	}
 +
-+	ban_window.framebuffer = framebuffer_or_error.release_value();
-+
 +	*format = SDL_PIXELFORMAT_BGR888;
-+	*pixels = ban_window.framebuffer.pixels().data();
-+	*pitch = ban_window.framebuffer.width() * sizeof(uint32_t);
++	*pixels = ban_window.window->texture().pixels().data();
++	*pitch = ban_window.window->texture().width() * sizeof(uint32_t);
 +
 +	return 0;
 +}
@@ -782,25 +789,8 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +
 +	auto& ban_window = *static_cast<banan_os_window*>(window->driverdata);
 +
-+	int min_x = ban_window.window->width();
-+	int min_y = ban_window.window->height();
-+	int max_x = 0;
-+	int max_y = 0;
-+	for (int i = 0; i < numrects; i++) {
-+		ban_window.window->texture().copy_texture(ban_window.framebuffer,
-+			rects[i].x, rects[i].y,
-+			rects[i].x, rects[i].y,
-+			rects[i].w, rects[i].h
-+		);
-+
-+		min_x = BAN::Math::min(min_x, rects[i].x);
-+		min_y = BAN::Math::min(min_y, rects[i].y);
-+		max_x = BAN::Math::max(max_x, rects[i].x + rects[i].w);
-+		max_y = BAN::Math::max(max_y, rects[i].y + rects[i].h);
-+	}
-+
-+	if (min_x < max_x && min_y < max_y)
-+		ban_window.window->invalidate(min_x, min_y, max_x - min_x, max_y - min_y);
++	for (int i = 0; i < numrects; i++)
++		ban_window.window->invalidate(rects[i].x, rects[i].y, rects[i].w, rects[i].h);
 +
 +	return 0;
 +}
@@ -808,32 +798,6 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +static void BANAN_OS_DestroyWindowFramebuffer(_THIS, SDL_Window* window)
 +{
 +	DUMP_FUNCTION();
-+
-+	auto& ban_window = *static_cast<banan_os_window*>(window->driverdata);
-+	ban_window.framebuffer = {};
-+}
-+
-+static int BANAN_OS_WaitEventTimeout(_THIS, int timeout)
-+{
-+	DUMP_FUNCTION();
-+
-+	auto& ban_video_device_data = *static_cast<banan_os_video_device_data*>(_this->driverdata);
-+	
-+	fd_set fds;
-+	FD_ZERO(&fds);
-+
-+	int max_fd = 0;
-+	for (auto* window : ban_video_device_data.windows)
-+	{
-+		max_fd = BAN::Math::max(max_fd, window->window->server_fd());
-+		FD_SET(window->window->server_fd(), &fds);
-+	}
-+
-+	timeval tv {
-+		.tv_sec = static_cast<time_t>(timeout / 1000),
-+		.tv_usec = static_cast<suseconds_t>((timeout % 1000) * 1000),
-+	};
-+	return select(max_fd + 1, &fds, nullptr, nullptr, &tv);
 +}
 +
 +static void BANAN_OS_PumpEvents(_THIS)
@@ -871,25 +835,19 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +	
 +	auto& ban_window = *static_cast<banan_os_window*>(window->driverdata);
 +
-+	auto framebuffer_or_error = LibGUI::Texture::create(ban_window.window->width(), ban_window.window->width(), 0x000000);
-+	if (framebuffer_or_error.is_error()) {
-+		dwarnln("LibGUI::Texture::create: {}", framebuffer_or_error.error());
-+		return nullptr;
-+	}
-+
 +	auto gl_context = OSMesaCreateContext(OSMESA_BGRA, NULL);
 +	if (gl_context == nullptr) {
 +		dwarnln("OSMesaCreateContext");
 +		return nullptr;
 +	}
 +
-+	auto fb = framebuffer_or_error.release_value();
++	auto& fb = ban_window.window->texture();
 +	if (!OSMesaMakeCurrent(gl_context, fb.pixels().data(), GL_UNSIGNED_BYTE, fb.width(), fb.height())) {
 +		OSMesaDestroyContext(gl_context);
 +		return nullptr;
 +	}
++	OSMesaPixelStore(OSMESA_Y_UP, 0);
 +
-+	ban_window.framebuffer = BAN::move(fb);
 +	ban_window.gl_context = gl_context;
 +
 +	return gl_context;
@@ -914,9 +872,10 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +
 +	auto gl_context = static_cast<OSMesaContext>(context);
 +
-+	auto& fb = ban_window.framebuffer;
++	auto& fb = ban_window.window->texture();
 +	if (!OSMesaMakeCurrent(gl_context, fb.pixels().data(), GL_UNSIGNED_BYTE, fb.width(), fb.height()))
 +		return -1;
++	OSMesaPixelStore(OSMESA_Y_UP, 0);
 +
 +	return 0;
 +}
@@ -931,15 +890,6 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +	glFinish();
 +
 +	auto& ban_window = *static_cast<banan_os_window*>(window->driverdata);
-+
-+	auto* src = ban_window.framebuffer.pixels().data();
-+	auto* dst = ban_window.window->texture().pixels().data();
-+
-+	const size_t width = ban_window.window->width();
-+	const size_t height = ban_window.window->height();
-+	for (size_t y = 0; y < height; y++)
-+		memcpy(&dst[(height - y - 1) * width], &src[y * width], width * 4);
-+
 +	ban_window.window->invalidate();
 +
 +	return 0;
@@ -982,7 +932,6 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +	device->UpdateWindowFramebuffer = BANAN_OS_UpdateWindowFramebuffer;
 +	device->DestroyWindowFramebuffer = BANAN_OS_DestroyWindowFramebuffer;
 +
-+	device->WaitEventTimeout = BANAN_OS_WaitEventTimeout;
 +	device->PumpEvents = BANAN_OS_PumpEvents;
 +
 +	device->GL_LoadLibrary = BANAN_OS_GL_LoadLibrary;
@@ -1006,9 +955,9 @@ diff -ruN SDL-release-2.30.11/src/video/banan_os/SDL_banan_os_video.cpp SDL-rele
 +#endif /* SDL_VIDEO_DRIVER_BANAN_OS */
 +
 +/* vi: set ts=4 sw=4 expandtab: */
-diff -ruN SDL-release-2.30.11/src/video/SDL_sysvideo.h SDL-release-2.30.11-banan_os/src/video/SDL_sysvideo.h
+diff -ruN SDL-release-2.30.11/src/video/SDL_sysvideo.h SDL2-2.30.11-banan_os/src/video/SDL_sysvideo.h
 --- SDL-release-2.30.11/src/video/SDL_sysvideo.h	2025-01-01 19:09:38.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/src/video/SDL_sysvideo.h	2025-06-24 18:55:08.546768590 +0300
++++ SDL2-2.30.11-banan_os/src/video/SDL_sysvideo.h	2025-08-03 14:04:09.895655165 +0300
 @@ -462,6 +462,7 @@
  extern VideoBootStrap WINDOWS_bootstrap;
  extern VideoBootStrap WINRT_bootstrap;
@@ -1017,9 +966,9 @@ diff -ruN SDL-release-2.30.11/src/video/SDL_sysvideo.h SDL-release-2.30.11-banan
  extern VideoBootStrap PND_bootstrap;
  extern VideoBootStrap UIKIT_bootstrap;
  extern VideoBootStrap Android_bootstrap;
-diff -ruN SDL-release-2.30.11/src/video/SDL_video.c SDL-release-2.30.11-banan_os/src/video/SDL_video.c
+diff -ruN SDL-release-2.30.11/src/video/SDL_video.c SDL2-2.30.11-banan_os/src/video/SDL_video.c
 --- SDL-release-2.30.11/src/video/SDL_video.c	2025-01-01 19:09:38.000000000 +0200
-+++ SDL-release-2.30.11-banan_os/src/video/SDL_video.c	2025-06-24 19:37:36.342677687 +0300
++++ SDL2-2.30.11-banan_os/src/video/SDL_video.c	2025-08-03 14:04:09.896007237 +0300
 @@ -94,6 +94,9 @@
  #ifdef SDL_VIDEO_DRIVER_HAIKU
      &HAIKU_bootstrap,

ports/cmake/build.sh

@@ -0,0 +1,27 @@
+#!/bin/bash ../install.sh
+
+NAME='cmake'
+VERSION='3.26.6' # NOTE: same version as used by our toolchain
+DOWNLOAD_URL="https://github.com/Kitware/CMake/releases/download/v$VERSION/cmake-$VERSION.tar.gz#070b9a2422e666d2c1437e2dab239a236e8a63622d0a8d0ffe9e389613d2b76a"
+DEPENDENCIES=('openssl' 'libuv' 'make' 'bash')
+
+configure() {
+	$BANAN_CMAKE \
+		--toolchain=$BANAN_TOOLCHAIN_DIR/Toolchain.txt \
+		-B build -GNinja --fresh \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DCMAKE_USE_OPENSSL=ON \
+		-DCMAKE_USE_SYSTEM_LIBUV=ON \
+		-DOPENSSL_ROOT_DIR=/usr \
+		-DBUILD_TESTING=OFF \
+		. || exit 1
+}
+
+build() {
+	$BANAN_CMAKE --build build || exit 1
+}
+
+install() {
+	$BANAN_CMAKE --install build || exit 1
+	cp $BANAN_TOOLCHAIN_DIR/cmake-platform/* $BANAN_SYSROOT/usr/share/cmake-3.26/Modules/Platform/
+}

ports/cmake/patches/0001-dont-use-siginfo.patch

@@ -0,0 +1,12 @@
+diff -ruN cmake-3.26.6/Source/kwsys/ProcessUNIX.c cmake-3.26.6-x86_64/Source/kwsys/ProcessUNIX.c
+--- cmake-3.26.6/Source/kwsys/ProcessUNIX.c	2023-11-27 20:48:12.000000000 +0200
++++ cmake-3.26.6-x86_64/Source/kwsys/ProcessUNIX.c	2025-07-30 21:49:08.783313124 +0300
+@@ -115,7 +115,7 @@
+ #endif
+ 
+ /* Some platforms do not have siginfo on their signal handlers.  */
+-#if defined(SA_SIGINFO) && !defined(__BEOS__)
++#if defined(SA_SIGINFO) && !defined(__BEOS__) && !defined(__banan_os__)
+ #  define KWSYSPE_USE_SIGINFO 1
+ #endif
+ 

ports/install.sh

@@ -42,8 +42,9 @@ fi
 export MESON_CROSS_FILE="$BANAN_PORT_DIR/$BANAN_ARCH-banan_os-meson.txt"
 if [ ! -f "$MESON_CROSS_FILE" ] || [ "$MESON_CROSS_FILE" -ot "$BANAN_TOOLCHAIN_DIR/meson-cross-file.in" ]; then
 	cp "$BANAN_TOOLCHAIN_DIR/meson-cross-file.in" "$MESON_CROSS_FILE"
-	sed -i "s/ARCH/$BANAN_ARCH/" "$MESON_CROSS_FILE"
-	sed -i "s/SYSROOT/$BANAN_SYSROOT/" "$MESON_CROSS_FILE"
+	sed -i "s|ARCH|$BANAN_ARCH|" "$MESON_CROSS_FILE"
+	sed -i "s|CMAKE|$BANAN_CMAKE|" "$MESON_CROSS_FILE"
+	sed -i "s|SYSROOT|$BANAN_SYSROOT|" "$MESON_CROSS_FILE"
 fi
 
 MAKE_BUILD_TARGETS=('all')

ports/libuv/build.sh

@@ -0,0 +1,23 @@
+#!/bin/bash ../install.sh
+
+NAME='libuv'
+VERSION='1.51.0'
+DOWNLOAD_URL="https://dist.libuv.org/dist/v$VERSION/libuv-v$VERSION.tar.gz#5f0557b90b1106de71951a3c3931de5e0430d78da1d9a10287ebc7a3f78ef8eb"
+TAR_CONTENT="libuv-v$VERSION"
+
+configure() {
+	$BANAN_CMAKE \
+		--toolchain="$BANAN_TOOLCHAIN_DIR/Toolchain.txt" \
+		-B build -GNinja --fresh \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DBUILD_TESTING=OFF \
+		. || exit 1
+}
+
+build() {
+	$BANAN_CMAKE --build build || exit 1
+}
+
+install() {
+	$BANAN_CMAKE --install build || exit 1
+}

ports/libuv/patches/0001-dont-use-cfmakeraw.patch

@@ -0,0 +1,21 @@
+diff -ruN libuv-v1.51.0/src/unix/tty.c libuv-1.51.0-x86_64/src/unix/tty.c
+--- libuv-v1.51.0/src/unix/tty.c	2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/src/unix/tty.c	2025-07-23 17:12:21.857957334 +0300
+@@ -30,7 +30,7 @@
+ #include <errno.h>
+ #include <sys/ioctl.h>
+ 
+-#if defined(__MVS__) && !defined(IMAXBEL)
++#if (defined(__MVS__) || defined(__banan_os__)) && !defined(IMAXBEL)
+ #define IMAXBEL 0
+ #endif
+ 
+@@ -244,7 +244,7 @@
+ static void uv__tty_make_raw(struct termios* tio) {
+   assert(tio != NULL);
+ 
+-#if defined __sun || defined __MVS__
++#if defined __sun || defined __MVS__ || defined(__banan_os__)
+   /*
+    * This implementation of cfmakeraw for Solaris and derivatives is taken from
+    * http://www.perkin.org.uk/posts/solaris-portability-cfmakeraw.html.

ports/libuv/patches/0002-use-simplified-rusage.patch

@@ -0,0 +1,12 @@
+diff -ruN libuv-v1.51.0/src/unix/core.c libuv-1.51.0-x86_64/src/unix/core.c
+--- libuv-v1.51.0/src/unix/core.c	2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/src/unix/core.c	2025-07-23 17:11:06.844349261 +0300
+@@ -1036,7 +1036,7 @@
+   rusage->ru_stime.tv_sec = usage.ru_stime.tv_sec;
+   rusage->ru_stime.tv_usec = usage.ru_stime.tv_usec;
+ 
+-#if !defined(__MVS__) && !defined(__HAIKU__)
++#if !defined(__MVS__) && !defined(__HAIKU__) && !defined(__banan_os__)
+   rusage->ru_maxrss = usage.ru_maxrss;
+   rusage->ru_ixrss = usage.ru_ixrss;
+   rusage->ru_idrss = usage.ru_idrss;

ports/libuv/patches/0003-use-statvfs.patch

@@ -0,0 +1,33 @@
+diff -ruN libuv-v1.51.0/src/unix/fs.c libuv-1.51.0-x86_64/src/unix/fs.c
+--- libuv-v1.51.0/src/unix/fs.c	2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/src/unix/fs.c	2025-07-23 17:14:28.118310214 +0300
+@@ -77,7 +77,8 @@
+       defined(__MVS__)    || \
+       defined(__NetBSD__) || \
+       defined(__HAIKU__)  || \
+-      defined(__QNX__)
++      defined(__QNX__)    || \
++      defined(__banan_os__)
+ # include <sys/statvfs.h>
+ #else
+ # include <sys/statfs.h>
+@@ -683,7 +684,8 @@
+     defined(__MVS__)    || \
+     defined(__NetBSD__) || \
+     defined(__HAIKU__)  || \
+-    defined(__QNX__)
++    defined(__QNX__)    || \
++    defined(__banan_os__)
+   struct statvfs buf;
+ 
+   if (0 != statvfs(req->path, &buf))
+@@ -705,7 +707,8 @@
+     defined(__OpenBSD__)  || \
+     defined(__NetBSD__)   || \
+     defined(__HAIKU__)    || \
+-    defined(__QNX__)
++    defined(__QNX__)      || \
++    defined(__banan_os__)
+   stat_fs->f_type = 0;  /* f_type is not supported. */
+ #else
+   stat_fs->f_type = buf.f_type;

ports/libuv/patches/0004-dont-use-setgroups.patch

@@ -0,0 +1,13 @@
+diff -ruN libuv-v1.51.0/src/unix/process.c libuv-1.51.0-x86_64/src/unix/process.c
+--- libuv-v1.51.0/src/unix/process.c	2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/src/unix/process.c	2025-07-23 17:16:04.548824726 +0300
+@@ -390,7 +390,9 @@
+      * aren't root, so don't bother checking the return value, this
+      * is just done as an optimistic privilege dropping function.
+      */
++ #if !defined(__banan_os__)
+     SAVE_ERRNO(setgroups(0, NULL));
++ #endif
+   }
+ 
+   if ((options->flags & UV_PROCESS_SETGID) && setgid(options->gid))

ports/libuv/patches/0005-dont-use-thread-names.patch

@@ -0,0 +1,22 @@
+diff -ruN libuv-v1.51.0/src/unix/thread.c libuv-1.51.0-x86_64/src/unix/thread.c
+--- libuv-v1.51.0/src/unix/thread.c	2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/src/unix/thread.c	2025-07-23 17:16:19.619749435 +0300
+@@ -897,7 +897,7 @@
+     abort();
+ }
+ 
+-#if defined(_AIX) || defined(__MVS__) || defined(__PASE__)
++#if defined(_AIX) || defined(__MVS__) || defined(__PASE__) || defined(__banan_os__)
+ int uv__thread_setname(const char* name) {
+   return UV_ENOSYS;
+ }
+@@ -938,7 +938,8 @@
+ #if (defined(__ANDROID_API__) && __ANDROID_API__ < 26) || \
+     defined(_AIX) || \
+     defined(__MVS__) || \
+-    defined(__PASE__)
++    defined(__PASE__) || \
++    defined(__banan_os__)
+ int uv__thread_getname(uv_thread_t* tid, char* name, size_t size) {
+   return UV_ENOSYS;
+ }

ports/libuv/patches/0006-use-simple-udp.patch

@@ -0,0 +1,23 @@
+diff -ruN libuv-v1.51.0/src/unix/udp.c libuv-1.51.0-x86_64/src/unix/udp.c
+--- libuv-v1.51.0/src/unix/udp.c	2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/src/unix/udp.c	2025-07-23 17:15:38.986952773 +0300
+@@ -767,7 +767,8 @@
+     !defined(__ANDROID__) &&                                        \
+     !defined(__DragonFly__) &&                                      \
+     !defined(__QNX__) &&                                            \
+-    !defined(__GNU__)
++    !defined(__GNU__) &&                                            \
++    !defined(__banan_os__)
+ static int uv__udp_set_source_membership4(uv_udp_t* handle,
+                                           const struct sockaddr_in* multicast_addr,
+                                           const char* interface_addr,
+@@ -958,7 +959,8 @@
+     !defined(__ANDROID__) &&                                        \
+     !defined(__DragonFly__) &&                                      \
+     !defined(__QNX__) &&                                            \
+-    !defined(__GNU__)
++    !defined(__GNU__) &&                                            \
++    !defined(__banan_os__)
+   int err;
+   union uv__sockaddr mcast_addr;
+   union uv__sockaddr src_addr;

ports/libuv/patches/0007-use-posix-functions.patch

@@ -0,0 +1,32 @@
+diff -ruN libuv-v1.51.0/include/uv/unix.h libuv-1.51.0-x86_64/include/uv/unix.h
+--- libuv-v1.51.0/include/uv/unix.h     2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/include/uv/unix.h       2025-07-28 14:06:18.220856588 +0300
+@@ -66,7 +66,8 @@
+       defined(__MSYS__)   || \
+       defined(__HAIKU__)  || \
+       defined(__QNX__)    || \
+-      defined(__GNU__)
++      defined(__GNU__)    || \
++      defined(__banan_os__)
+ # include "uv/posix.h"
+ #endif
+ 
+diff -ruN libuv-v1.51.0/CMakeLists.txt libuv-1.51.0-x86_64/CMakeLists.txt
+--- libuv-v1.51.0/CMakeLists.txt        2025-04-25 12:50:27.000000000 +0300
++++ libuv-1.51.0-x86_64/CMakeLists.txt  2025-07-28 13:57:21.518563402 +0300
+@@ -283,6 +283,15 @@
+   list(APPEND uv_sources src/unix/proctitle.c)
+ endif()
+ 
++if(CMAKE_SYSTEM_NAME STREQUAL "banan-os")
++  list(APPEND uv_sources
++       src/unix/no-fsevents.c
++       src/unix/no-proctitle.c
++       src/unix/posix-hrtime.c
++       src/unix/posix-poll.c
++  )
++endif()
++
+ if(CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD")
+   list(APPEND uv_sources src/unix/freebsd.c)
+ endif()

ports/llvm/build.sh

@@ -0,0 +1,34 @@
+#!/bin/bash ../install.sh
+
+NAME='llvm'
+VERSION='20.1.8'
+DOWNLOAD_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-$VERSION/llvm-project-$VERSION.src.tar.xz#6898f963c8e938981e6c4a302e83ec5beb4630147c7311183cf61069af16333d"
+TAR_CONTENT="llvm-project-$VERSION.src"
+DEPENDENCIES=('zlib' 'zstd')
+
+configure() {
+	unset CC CXX LD
+
+	$BANAN_CMAKE -B build -S llvm -G Ninja \
+		--toolchain="$BANAN_TOOLCHAIN_DIR/Toolchain.txt" \
+		-DCMAKE_BUILD_TYPE=Release \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DLLVM_ENABLE_PROJECTS= \
+		-DLLVM_ENABLE_RTTI=ON \
+		-DLLVM_TARGETS_TO_BUILD=X86 \
+		-DLLVM_INCLUDE_BENCHMARKS=OFF \
+		-DLLVM_INCLUDE_TESTS=OFF \
+		-DLLVM_HOST_TRIPLE=x86_64-pc-banan_os \
+		-DLLVM_PARALLEL_LINK_JOBS=1 \
+		 || exit 1
+}
+
+build() {
+	$BANAN_CMAKE --build build || exit 1
+}
+
+install() {
+	# This port only contains llvm libraries used optionally by
+	# mesa port. There is no need to install and fill the disk :D
+	:
+}

ports/llvm/patches/0001-add-banan_os-support.patch

@@ -0,0 +1,107 @@
+diff -ruN llvm-project-20.1.8.src/llvm/include/llvm/ADT/bit.h llvm-project-20.1.8.src-banan_os/llvm/include/llvm/ADT/bit.h
+--- llvm-project-20.1.8.src/llvm/include/llvm/ADT/bit.h	2025-07-09 02:06:32.000000000 +0300
++++ llvm-project-20.1.8.src-banan_os/llvm/include/llvm/ADT/bit.h	2025-08-03 17:05:07.723852159 +0300
+@@ -29,7 +29,7 @@
+ 
+ #if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__) ||            \
+     defined(__Fuchsia__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__) ||  \
+-    defined(__OpenBSD__) || defined(__DragonFly__)
++    defined(__OpenBSD__) || defined(__DragonFly__) || defined(__banan_os__)
+ #include <endian.h>
+ #elif defined(_AIX)
+ #include <sys/machine.h>
+diff -ruN llvm-project-20.1.8.src/llvm/include/llvm/Support/ExitCodes.h llvm-project-20.1.8.src-banan_os/llvm/include/llvm/Support/ExitCodes.h
+--- llvm-project-20.1.8.src/llvm/include/llvm/Support/ExitCodes.h	2025-07-09 02:06:32.000000000 +0300
++++ llvm-project-20.1.8.src-banan_os/llvm/include/llvm/Support/ExitCodes.h	2025-08-03 17:05:35.659696821 +0300
+@@ -20,6 +20,8 @@
+ 
+ #if HAVE_SYSEXITS_H
+ #include <sysexits.h>
++#elif defined(__banan_os__)
++#define EX_IOERR 69
+ #elif __MVS__ || defined(_WIN32)
+ // <sysexits.h> does not exist on z/OS and Windows. The only value used in LLVM
+ // is EX_IOERR, which is used to signal a special error condition (broken pipe).
+diff -ruN llvm-project-20.1.8.src/llvm/lib/Support/Unix/Path.inc llvm-project-20.1.8.src-banan_os/llvm/lib/Support/Unix/Path.inc
+--- llvm-project-20.1.8.src/llvm/lib/Support/Unix/Path.inc	2025-07-09 02:06:32.000000000 +0300
++++ llvm-project-20.1.8.src-banan_os/llvm/lib/Support/Unix/Path.inc	2025-08-03 17:06:42.941322766 +0300
+@@ -107,7 +107,7 @@
+ #endif
+ 
+ #if defined(__NetBSD__) || defined(__DragonFly__) || defined(__GNU__) ||       \
+-    defined(__MVS__)
++    defined(__MVS__) || defined(__banan_os__)
+ #define STATVFS_F_FLAG(vfs) (vfs).f_flag
+ #else
+ #define STATVFS_F_FLAG(vfs) (vfs).f_flags
+@@ -317,6 +317,9 @@
+       return std::string(real_path);
+     break; // Found entry, but realpath failed.
+   }
++#elif defined(__banan_os__)
++  fprintf(stddbg, "TODO: getMainExecutable\n");
++  return "";
+ #elif defined(HAVE_DLOPEN)
+   // Use dladdr to get executable path if available.
+   Dl_info DLInfo;
+@@ -506,6 +509,9 @@
+ #elif defined(__HAIKU__)
+   // Haiku doesn't expose this information.
+   return false;
++#elif defined(__banan_os__)
++  // banan-os doesn't currently support remote filesystem mounts.
++  return true;
+ #elif defined(__sun)
+   // statvfs::f_basetype contains a null-terminated FSType name of the mounted
+   // target
+diff -ruN llvm-project-20.1.8.src/llvm/lib/Support/Unix/Program.inc llvm-project-20.1.8.src-banan_os/llvm/lib/Support/Unix/Program.inc
+--- llvm-project-20.1.8.src/llvm/lib/Support/Unix/Program.inc	2025-07-09 02:06:32.000000000 +0300
++++ llvm-project-20.1.8.src-banan_os/llvm/lib/Support/Unix/Program.inc	2025-08-03 17:04:50.500947936 +0300
+@@ -342,7 +342,7 @@
+ namespace llvm {
+ namespace sys {
+ 
+-#if defined(_AIX)
++#if defined(_AIX) || defined(__banan_os__)
+ static pid_t(wait4)(pid_t pid, int *status, int options, struct rusage *usage);
+ #elif !defined(__Fuchsia__)
+ using ::wait4;
+@@ -383,6 +383,17 @@
+   // would cause the call here to fail with ECHILD).
+   return ::wait4(pid, status, options & ~WNOHANG, usage);
+ }
++#elif defined(__banan_os__)
++
++#ifndef _ALL_SOURCE
++extern "C" pid_t(wait4)(pid_t pid, int *status, int options,
++                        struct rusage *usage);
++#endif
++pid_t(llvm::sys::wait4)(pid_t pid, int *status, int options,
++                        struct rusage *usage) {
++    memset(usage, 0, sizeof(struct rusage));
++       return waitpid(pid, status, options);
++}
+ #endif
+ 
+ ProcessInfo llvm::sys::Wait(const ProcessInfo &PI,
+@@ -468,7 +479,7 @@
+     std::chrono::microseconds UserT = toDuration(Info.ru_utime);
+     std::chrono::microseconds KernelT = toDuration(Info.ru_stime);
+     uint64_t PeakMemory = 0;
+-#if !defined(__HAIKU__) && !defined(__MVS__)
++#if !defined(__HAIKU__) && !defined(__MVS__) && !defined(__banan_os__)
+     PeakMemory = static_cast<uint64_t>(Info.ru_maxrss);
+ #endif
+     *ProcStat = ProcessStatistics{UserT + KernelT, UserT, PeakMemory};
+diff -ruN llvm-project-20.1.8.src/llvm/lib/Support/Unix/Signals.inc llvm-project-20.1.8.src-banan_os/llvm/lib/Support/Unix/Signals.inc
+--- llvm-project-20.1.8.src/llvm/lib/Support/Unix/Signals.inc	2025-07-09 02:06:32.000000000 +0300
++++ llvm-project-20.1.8.src-banan_os/llvm/lib/Support/Unix/Signals.inc	2025-08-03 17:03:20.739447219 +0300
+@@ -817,7 +817,7 @@
+   OS << "Stack dump without symbol names (ensure you have llvm-symbolizer in "
+         "your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point "
+         "to it):\n";
+-#if HAVE_DLOPEN && !defined(_AIX)
++#if HAVE_DLOPEN && !defined(_AIX) && !defined(__banan_os__)
+   int width = 0;
+   for (int i = 0; i < depth; ++i) {
+     Dl_info dlinfo;

ports/mesa/build.sh

@@ -7,7 +7,6 @@ DEPENDENCIES=('zlib' 'zstd' 'expat')
 CONFIGURE_OPTIONS=(
 	'-Dprefix=/usr'
 	'-Dosmesa=true'
-	'-Dgallium-drivers=softpipe'
 	'-Dvulkan-drivers=[]'
 	'-Dplatforms=[]'
 	'-Dglx=disabled'
@@ -15,7 +14,50 @@ CONFIGURE_OPTIONS=(
 )
 
 configure() {
-	meson setup --reconfigure --cross-file "$MESON_CROSS_FILE" "${CONFIGURE_OPTIONS[@]}" build || exit 1
+	llvm_version='20.1.9'
+	llvm_root="../../llvm/llvm-$llvm_version-$BANAN_ARCH"
+
+	gallium_driver=softpipe
+
+	if [ -d "$llvm_root" ]; then
+		llvm_lib=$(realpath "$llvm_root/build/lib")
+
+		mkdir -p subprojects/llvm
+
+		wrap_file='subprojects/llvm/meson.build'
+		echo "project('llvm', ['cpp'])"                         >$wrap_file
+		echo ""                                                >>$wrap_file
+		echo "cpp = meson.get_compiler('cpp')"                 >>$wrap_file
+		echo ""                                                >>$wrap_file
+		echo "_deps = []"                                      >>$wrap_file
+		echo "_search = '$llvm_lib'"                           >>$wrap_file
+		echo "foreach d : ["                                   >>$wrap_file
+		for path in $llvm_lib/libLLVM*.a; do
+			name=$(basename $path)
+			echo "    '${name:3:-2}',"                         >>$wrap_file
+		done
+		echo "  ]"                                             >>$wrap_file
+		echo "  _deps += cpp.find_library(d, dirs : _search)"  >>$wrap_file
+		echo "endforeach"                                      >>$wrap_file
+		echo ""                                                >>$wrap_file
+		echo "dep_llvm = declare_dependency("                  >>$wrap_file
+		echo "  include_directories : include_directories("    >>$wrap_file
+		echo "      '$(realpath $llvm_root/llvm/include)',"    >>$wrap_file
+		echo "      '$(realpath $llvm_root/build/include)',"   >>$wrap_file
+		echo "    )," >>$wrap_file
+		echo "  dependencies : _deps,"                         >>$wrap_file
+		echo "  version : '$llvm_version',"                    >>$wrap_file
+		echo ")"                                               >>$wrap_file
+
+		gallium_driver=llvmpipe
+	fi
+
+	meson setup \
+		--reconfigure \
+		--cross-file "$MESON_CROSS_FILE" \
+		"${CONFIGURE_OPTIONS[@]}" \
+		"-Dgallium-drivers=$gallium_driver" \
+		build || exit 1
 }
 
 build() {

ports/mesa/patches/0005-dont-use-drm-with-llvm.patch

@@ -0,0 +1,21 @@
+diff -ru mesa-25.0.7-banan_os/src/gallium/drivers/llvmpipe/lp_texture.c mesa-25.0.7-x86_64/src/gallium/drivers/llvmpipe/lp_texture.c
+--- mesa-25.0.7-banan_os/src/gallium/drivers/llvmpipe/lp_texture.c      2025-05-28 18:20:23.000000000 +0300
++++ mesa-25.0.7-x86_64/src/gallium/drivers/llvmpipe/lp_texture.c        2025-08-03 19:16:20.254971098 +0300
+@@ -59,7 +59,7 @@
+ #include "frontend/sw_winsys.h"
+ #include "git_sha1.h"
+ 
+-#ifndef _WIN32
++#if !defined(_WIN32) && !defined(__banan_os__)
+ #include "drm-uapi/drm_fourcc.h"
+ #endif
+ 
+@@ -1713,7 +1713,7 @@
+    case PIPE_RESOURCE_PARAM_LAYER_STRIDE:
+       *value = lpr->img_stride[level];
+       return true;
+-#ifndef _WIN32
++#if !defined(_WIN32) && !defined(__banan_os__)
+    case PIPE_RESOURCE_PARAM_MODIFIER:
+       *value = lpr->dmabuf ? DRM_FORMAT_MOD_LINEAR : DRM_FORMAT_MOD_INVALID;
+       return true;

ports/ncurses/build.sh

@@ -13,8 +13,7 @@ CONFIGURE_OPTIONS=(
 	'--with-shared'
 	'--without-ada'
 	'--without-manpages'
-	'--without-dlsym'
-	'--without-cxx-binding'
+	CFLAGS='-std=c17'
 )
 
 post_install() {

ports/xash3d-fwgs/build.sh

@@ -20,7 +20,7 @@ configure() {
 	done
 	popd
 
-	./waf configure -T release --disable-gl || exit 1
+	./waf configure -T release || exit 1
 }
 
 build() {
@@ -29,6 +29,7 @@ build() {
 
 install() {
     ./waf install --destdir=$BANAN_SYSROOT/home/user/halflife || exit 1
+	patchelf --add-needed libxash.so $BANAN_SYSROOT/home/user/halflife/xash3d
 
 	cat > $BANAN_SYSROOT/home/user/halflife/start.sh << EOF
 #!/bin/Shell

ports/zstd/build.sh

@@ -1,17 +1,20 @@
 #!/bin/bash ../install.sh
 
 NAME='zstd'
-VERSION='1.5.6'
-DOWNLOAD_URL="https://github.com/facebook/zstd/releases/download/v$VERSION/zstd-$VERSION.tar.gz#8c29e06cf42aacc1eafc4077ae2ec6c6fcb96a626157e0593d5e82a34fd403c1"
+VERSION='1.5.7'
+DOWNLOAD_URL="https://github.com/facebook/zstd/releases/download/v$VERSION/zstd-$VERSION.tar.gz#eb33e51f49a15e023950cd7825ca74a4a2b43db8354825ac24fc1b7ee09e6fa3"
 
 configure() {
-	:
+	$BANAN_CMAKE -B _build -S build/cmake -G Ninja \
+		--toolchain $BANAN_TOOLCHAIN_DIR/Toolchain.txt \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		 || exit 1
 }
 
 build() {
-	make -C lib -j$(nproc) lib-nomt || exit 1
+	$BANAN_CMAKE --build _build ||exit 1
 }
 
 install() {
-	make -C lib install "DESTDIR=$BANAN_SYSROOT" PREFIX=/usr || exit 1
+	$BANAN_CMAKE --install _build ||exit 1
 }

script/build.sh

@@ -4,13 +4,11 @@ set -e
 export BANAN_SCRIPT_DIR=$(dirname $(realpath $0))
 source $BANAN_SCRIPT_DIR/config.sh
 
-FAKEROOT_FILE="$BANAN_BUILD_DIR/fakeroot-context"
-
 run_fakeroot() {
-	if [ ! -f $FAKEROOT_FILE ]; then
-		touch $FAKEROOT_FILE
+	if [ ! -f $BANAN_FAKEROOT ]; then
+		touch $BANAN_FAKEROOT
 	fi
-	fakeroot -i $FAKEROOT_FILE -s $FAKEROOT_FILE -- /bin/bash -c '$@' bash $@
+	fakeroot -i $BANAN_FAKEROOT -s $BANAN_FAKEROOT -- /bin/bash -c '$@' bash $@
 }
 
 make_build_dir () {
@@ -47,11 +45,6 @@ build_toolchain () {
 create_image () {
 	build_target all
 	build_target install
-
-	pushd $BANAN_SYSROOT >/dev/null
-	run_fakeroot tar cf ${BANAN_SYSROOT_TAR} *
-	popd >/dev/null
-
 	$BANAN_SCRIPT_DIR/image.sh "$1"
 }
 

script/config.sh

@@ -20,7 +20,8 @@ export BANAN_BUILD_DIR="$BANAN_ROOT_DIR/build"
 export BANAN_PORT_DIR="$BANAN_ROOT_DIR/ports"
 
 export BANAN_SYSROOT="$BANAN_BUILD_DIR/sysroot"
-export BANAN_SYSROOT_TAR="$BANAN_SYSROOT.tar"
+
+export BANAN_FAKEROOT="$BANAN_BUILD_DIR/fakeroot-context"
 
 export BANAN_DISK_IMAGE_PATH="$BANAN_BUILD_DIR/banan-os.img"
 

script/image.sh

@@ -5,8 +5,13 @@ if [ -z $BANAN_DISK_IMAGE_PATH ]; then
 	exit 1
 fi
 
-if [ -z $BANAN_SYSROOT_TAR ]; then
-	echo  "You must set the BANAN_SYSROOT_TAR environment variable" >&2
+if [ -z $BANAN_SYSROOT ]; then
+	echo  "You must set the BANAN_SYSROOT environment variable" >&2
+	exit 1
+fi
+
+if [ -z $BANAN_FAKEROOT ]; then
+	echo  "You must set the BANAN_FAKEROOT environment variable" >&2
 	exit 1
 fi
 
@@ -34,13 +39,33 @@ fi
 
 if sudo mount $ROOT_PARTITION $MOUNT_DIR; then
 	if (($BANAN_INITRD)); then
+		fakeroot -i $BANAN_FAKEROOT tar -C $BANAN_SYSROOT -cf $BANAN_SYSROOT.initrd .
+
 		sudo mkdir -p $MOUNT_DIR/boot
 		sudo cp $BANAN_BUILD_DIR/kernel/banan-os.kernel $MOUNT_DIR/boot/banan-os.kernel
-		sudo cp $BANAN_SYSROOT_TAR $MOUNT_DIR/boot/banan-os.initrd
+		sudo mv $BANAN_SYSROOT.initrd $MOUNT_DIR/boot/banan-os.initrd
 	else
-		cd $MOUNT_DIR
-		sudo tar xf $BANAN_SYSROOT_TAR
-		cd
+		sudo rsync -rulHpt $BANAN_SYSROOT/ $MOUNT_DIR
+
+		fakeroot -i $BANAN_FAKEROOT find $BANAN_SYSROOT -printf './%P|%U|%G\n' >$BANAN_BUILD_DIR/sysroot-perms.txt
+		sudo bash -c "
+			if enable stat &>/dev/null; then
+				while IFS='|' read -r path uid gid; do
+					full=\"$MOUNT_DIR/\$path\"
+					stat \"\$full\"
+					if [[ \${STAT[uid]} != \$uid ]] || [[ \${STAT[gid]} != \$gid ]]; then
+						chown -h \"\$uid:\$gid\" \"\$full\"
+					fi
+				done <$BANAN_BUILD_DIR/sysroot-perms.txt
+			else
+				while IFS='|' read -r path uid gid; do
+					full=\"$MOUNT_DIR/\$path\"
+					if [[ \$(stat -c '%u %g' \"\$full\") != \"\$uid \$gid\" ]]; then
+						chown -h \"\$uid:\$gid\" \"\$full\"
+					fi
+				done <$BANAN_BUILD_DIR/sysroot-perms.txt
+			fi
+		"
 	fi
 
 	sudo umount $MOUNT_DIR

toolchain/.gitignore

@@ -1 +1 @@
-*/
+local/

toolchain/Toolchain.txt

@@ -8,15 +8,10 @@ if (NOT DEFINED ENV{BANAN_SYSROOT})
 endif ()
 set(BANAN_SYSROOT $ENV{BANAN_SYSROOT})
 
-if (NOT DEFINED ENV{BANAN_SYSROOT_TAR})
-	message(FATAL_ERROR "environment variable BANAN_SYSROOT_TAR not defined")
+if (NOT DEFINED ENV{BANAN_TOOLCHAIN_PREFIX})
+       message(FATAL_ERROR "environment variable BANAN_TOOLCHAIN_PREFIX not defined")
 endif ()
-set(BANAN_SYSROOT_TAR $ENV{BANAN_SYSROOT_TAR})
-
-if (NOT DEFINED ENV{BANAN_ROOT_DIR})
-	message(FATAL_ERROR "environment variable BANAN_ROOT_DIR not defined")
-endif ()
-set(TOOLCHAIN_PREFIX $ENV{BANAN_ROOT_DIR}/toolchain/local)
+set(TOOLCHAIN_PREFIX $ENV{BANAN_TOOLCHAIN_PREFIX})
 
 set(CMAKE_SYSTEM_NAME banan-os)
 set(CMAKE_SYSTEM_PROCESSOR ${BANAN_ARCH})

toolchain/build.sh

@@ -193,6 +193,8 @@ build_cmake() {
 
 	cp -r ./bin/* $BANAN_TOOLCHAIN_PREFIX/bin/
 	cp -r ./share/* $BANAN_TOOLCHAIN_PREFIX/share/
+
+	cp $BANAN_TOOLCHAIN_DIR/cmake-platform/* $BANAN_TOOLCHAIN_PREFIX/share/cmake-3.26/Modules/Platform/
 }
 
 BUILD_BINUTILS=1

toolchain/cmake-platform/banan-os-GNU-ASM.cmake

@@ -0,0 +1,2 @@
+include(Platform/banan-os-GNU)
+__banan_os_compiler_gnu(ASM)

toolchain/cmake-platform/banan-os-GNU-C.cmake

@@ -0,0 +1,2 @@
+include(Platform/banan-os-GNU)
+__banan_os_compiler_gnu(C)

toolchain/cmake-platform/banan-os-GNU-CXX.cmake

@@ -0,0 +1,2 @@
+include(Platform/banan-os-GNU)
+__banan_os_compiler_gnu(CXX)

toolchain/cmake-platform/banan-os-GNU.cmake

@@ -0,0 +1,20 @@
+# This module is shared by multiple languages; use include blocker.
+include_guard()
+
+macro(__banan_os_compiler_gnu lang)
+  set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG "-Wl,-rpath,")
+  set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG_SEP ":")
+  set(CMAKE_SHARED_LIBRARY_RPATH_LINK_${lang}_FLAG "-Wl,-rpath-link,")
+  set(CMAKE_SHARED_LIBRARY_SONAME_${lang}_FLAG "-Wl,-soname,")
+  set(CMAKE_EXE_EXPORTS_${lang}_FLAG "-Wl,--export-dynamic")
+
+  # Initialize link type selection flags.  These flags are used when
+  # building a shared library, shared module, or executable that links
+  # to other libraries to select whether to use the static or shared
+  # versions of the libraries.
+  foreach(type SHARED_LIBRARY SHARED_MODULE EXE)
+    set(CMAKE_${type}_LINK_STATIC_${lang}_FLAGS "-Wl,-Bstatic")
+    set(CMAKE_${type}_LINK_DYNAMIC_${lang}_FLAGS "-Wl,-Bdynamic")
+  endforeach()
+
+endmacro()

toolchain/cmake-platform/banan-os-Initialize.cmake

@@ -0,0 +1,2 @@
+set(BANAN_OS 1)
+set(UNIX 1)

toolchain/cmake-platform/banan-os.cmake

@@ -0,0 +1,9 @@
+set(CMAKE_DL_LIBS "")
+set(CMAKE_SHARED_LIBRARY_RPATH_ORIGIN_TOKEN "\$ORIGIN")
+set(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
+
+# Shared libraries with no builtin soname may not be linked safely by
+# specifying the file path.
+set(CMAKE_PLATFORM_USES_PATH_WHEN_NO_SONAME 1)
+
+include(Platform/UnixPaths)

toolchain/meson-cross-file.in

@@ -11,7 +11,8 @@ ar = 'ARCH-pc-banan_os-ar'
 ld = 'ARCH-pc-banan_os-ld'
 objcopy = 'ARCH-pc-banan_os-objcopy'
 strip = 'ARCH-pc-banan_os-strip'
-pkgconfig = 'pkg-config'
+pkg-config = 'pkg-config'
+cmake = 'CMAKE'
 
 [properties]
 sys_root='SYSROOT'

userspace/libraries/LibC/CMakeLists.txt

@@ -20,6 +20,7 @@ set(LIBC_SOURCES
 	malloc.cpp
 	math.cpp
 	netdb.cpp
+	netinet/in.cpp
 	poll.cpp
 	printf_impl.cpp
 	pthread.cpp
@@ -35,6 +36,7 @@ set(LIBC_SOURCES
 	sys/banan-os.cpp
 	sys/epoll.cpp
 	sys/file.cpp
+	sys/futex.cpp
 	sys/ioctl.cpp
 	sys/mman.cpp
 	sys/resource.cpp

userspace/libraries/LibC/dirent.cpp

@@ -2,6 +2,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
+#include <string.h>
 #include <sys/syscall.h>
 #include <unistd.h>
 
@@ -109,3 +110,54 @@ void rewinddir(DIR* dirp)
 	dirp->entry_index = 0;
 	lseek(dirp->fd, 0, SEEK_SET);
 }
+
+int alphasort(const struct dirent** d1, const struct dirent** d2)
+{
+	return strcoll((*d1)->d_name, (*d2)->d_name);
+}
+
+int scandir(const char* dir, struct dirent*** namelist, int (*sel)(const struct dirent*), int (*compar)(const struct dirent**, const struct dirent**))
+{
+	DIR* dirp = opendir(dir);
+	if (dirp == nullptr)
+		return -1;
+
+	size_t count = 0;
+	dirent** list = nullptr;
+
+	dirent* dent;
+	while ((dent = readdir(dirp)))
+	{
+		if (sel && sel(dent) == 0)
+			continue;
+
+		void* new_list = realloc(list, (count + 1) * sizeof(dirent*));
+		if (new_list == nullptr)
+			goto scandir_error;
+
+		list = static_cast<dirent**>(new_list);
+		list[count] = static_cast<dirent*>(malloc(sizeof(dirent)));
+		if (list[count] == nullptr)
+			goto scandir_error;
+
+		memcpy(list[count], dent, sizeof(dirent));
+		count++;
+	}
+
+	closedir(dirp);
+
+	qsort(list, count, sizeof(dirent*), reinterpret_cast<int(*)(const void*, const void*)>(compar));
+
+	*namelist = list;
+	return count;
+
+scandir_error:
+	closedir(dirp);
+
+	for (size_t i = 0; i < count; i++)
+		free(list[i]);
+	free(list);
+
+	*namelist = nullptr;
+	return -1;
+}

userspace/libraries/LibC/errno.cpp

@@ -1,8 +1,6 @@
 #include <errno.h>
 #include <pthread.h>
 
-extern uthread* _get_uthread();
-
 int* __errno_location()
 {
 	return &_get_uthread()->errno_;

userspace/libraries/LibC/grp.cpp

@@ -1,162 +1,213 @@
-#include <BAN/StringView.h>
-#include <BAN/Vector.h>
-
 #include <ctype.h>
 #include <errno.h>
-#include <fcntl.h>
 #include <grp.h>
 #include <stdlib.h>
-#include <sys/mman.h>
-#include <sys/types.h>
+#include <string.h>
+#include <unistd.h>
 
-static struct stat s_group_st;
-static char* s_group_mmap = nullptr;
-static int s_group_fd = -1;
+static FILE* s_grent_fp = nullptr;
+static group s_grent_struct;
 
-static struct group s_group;
+static char* s_grent_buffer = nullptr;
+static size_t s_grent_buffer_size = 0;
 
-id_t parse_id(BAN::StringView string)
+void endgrent(void)
 {
-	id_t id = 0;
-	for (char c : string)
-	{
-		if (!isdigit(c))
-			return -1;
-		id = (id * 10) + (c - '0');
-	}
-	return id;
+	if (s_grent_fp)
+		fclose(s_grent_fp);
+	s_grent_fp = nullptr;
+
+	if (s_grent_buffer)
+		free(s_grent_buffer);
+	s_grent_buffer = nullptr;
 }
 
-static bool open_group_file()
+void setgrent(void)
 {
-	if (s_group_fd == -1)
-		s_group_fd = open("/etc/group", O_RDONLY);
-	if (s_group_fd == -1)
-		return false;
-
-	if (fstat(s_group_fd, &s_group_st) == -1)
-		return false;
-
-	if (s_group_mmap == nullptr || s_group_mmap == MAP_FAILED)
-		s_group_mmap = (char*)mmap(nullptr, s_group_st.st_size, PROT_READ, MAP_PRIVATE, s_group_fd, 0);
-	if (s_group_mmap == MAP_FAILED)
-		return false;
-
-	s_group.gr_name = nullptr;
-	s_group.gr_mem = nullptr;
-
-	return true;
+	if (!s_grent_fp)
+		return;
+	fseek(s_grent_fp, 0, SEEK_SET);
 }
 
-struct group* fill_group(const BAN::Vector<BAN::StringView>& parts)
+static int getgrent_impl(FILE* fp, struct group* grp, char* buffer, size_t bufsize, struct group** result)
 {
-	if (parts.size() != 4)
-		return nullptr;
-
-	if (s_group.gr_name)
+	for (;;)
 	{
-		free(s_group.gr_name);
-		s_group.gr_name = nullptr;
+		if (fgets(buffer, bufsize, fp) == nullptr)
+		{
+			if (ferror(fp))
+				return errno;
+			*result = nullptr;
+			return 0;
 		}
 
-	if (s_group.gr_mem)
+		const size_t line_len = strlen(buffer);
+		if (line_len == 0)
+			continue;
+
+		if (buffer[line_len - 1] == '\n')
+			buffer[line_len - 1] = '\0';
+		else if (!feof(fp))
+			return (errno = ERANGE);
+
+#define GET_STRING() ({ \
+			ptr = strchr(ptr, ':'); \
+			if (ptr == nullptr) \
+				continue; \
+			*ptr++ = '\0'; \
+		})
+
+#define GET_INT() ({ \
+				if (!isdigit(*ptr)) \
+					continue; \
+				long val = 0; \
+				while (isdigit(*ptr)) \
+					val = (val * 10) + (*ptr++ - '0'); \
+				if (*ptr != ':') \
+					continue; \
+				*ptr++ = '\0'; \
+				val; \
+			})
+
+		char* ptr = buffer;
+
+		grp->gr_name = ptr;
+		GET_STRING();
+
+		grp->gr_passwd = ptr;
+		GET_STRING();
+
+		grp->gr_gid = GET_INT();
+
+		size_t offset = line_len + 1;
+		if (auto rem = offset % alignof(char*))
+			offset += alignof(char*) - rem;
+		grp->gr_mem = reinterpret_cast<char**>(buffer + offset);
+
+		const size_t mem_max = (bufsize - offset) / sizeof(char*);
+		size_t mem_idx = 0;
+
+		while (*ptr && mem_idx + 1 <= mem_max)
 		{
-		for (size_t i = 0; s_group.gr_mem && s_group.gr_mem[i]; i++)
-			free(s_group.gr_mem[i]);
-		free(s_group.gr_mem);
-		s_group.gr_mem = nullptr;
+			grp->gr_mem[mem_idx++] = ptr;
+
+			ptr = strchrnul(ptr, ',');
+			if (*ptr == ',')
+				*ptr++ = '\0';
 		}
 
-	auto groups_or_error = parts[3].split(',');
-	if (groups_or_error.is_error())
-		return nullptr;
-	auto groups = groups_or_error.release_value();
+		if (mem_idx + 1 > mem_max)
+			return (errno = ERANGE);
 
-	s_group.gr_gid = parse_id(parts[2]);
-	if (s_group.gr_gid == -1)
-		return nullptr;
-
-	s_group.gr_name = (char*)malloc(parts[0].size() + 1);
-	if (s_group.gr_name == nullptr)
-		return nullptr;
-	memcpy(s_group.gr_name, parts[0].data(), parts[0].size());
-	s_group.gr_name[parts[0].size()] = '\0';
-
-	s_group.gr_mem = (char**)malloc((groups.size() + 1) * sizeof(char*));
-	if (s_group.gr_mem == nullptr)
-		return nullptr;
-
-	for (size_t i = 0; i < groups.size(); i++)
-	{
-		s_group.gr_mem[i] = (char*)malloc(groups[i].size() + 1);
-		if (s_group.gr_mem[i] == nullptr)
-		{
-			for (size_t j = 0; j < i; j++)
-				free(s_group.gr_mem[j]);
-			free(s_group.gr_mem);
-			s_group.gr_mem = nullptr;
-			return nullptr;
+		grp->gr_mem[mem_idx] = nullptr;
+		*result = grp;
+		return 0;
 	}
-		memcpy(s_group.gr_mem[i], groups[i].data(), groups[i].size());
-		s_group.gr_mem[i][groups[i].size()] = '\0';
-	}
-	s_group.gr_mem[groups.size()] = nullptr;
-
-	return &s_group;
 }
 
-struct group* getgrnam(const char* name)
+struct group* getgrent(void)
 {
-	if (s_group_mmap == nullptr || s_group_mmap == MAP_FAILED)
-		if (!open_group_file())
-			return nullptr;
-
-	off_t start = 0;
-	off_t end = 0;
-	while (start < s_group_st.st_size)
+	if (s_grent_fp == nullptr)
 	{
-		while (end < s_group_st.st_size && s_group_mmap[end] != '\n')
-			end++;
-
-		BAN::StringView line(s_group_mmap + start, end - start);
-		start = ++end;
-
-		auto parts_or_error = line.split(':', true);
-		if (parts_or_error.is_error())
+		s_grent_fp = fopen("/etc/group", "r");
+		if (s_grent_fp == nullptr)
 			return nullptr;
-
-		auto parts = parts_or_error.release_value();
-		if (parts.size() == 4 && parts[0] == name)
-			return fill_group(parts);
 	}
 
+	if (s_grent_buffer == nullptr)
+	{
+		long size = sysconf(_SC_GETGR_R_SIZE_MAX);
+		if (size == -1)
+			size = 512;
+
+		s_grent_buffer = static_cast<char*>(malloc(size));
+		if (s_grent_buffer == nullptr)
 			return nullptr;
+		s_grent_buffer_size = size;
+	}
+
+	const off_t old_offset = ftello(s_grent_fp);
+
+	group* result;
+	for (;;)
+	{
+		const int error = getgrent_impl(s_grent_fp, &s_grent_struct, s_grent_buffer, s_grent_buffer_size, &result);
+		if (error == 0)
+			break;
+		fseeko(s_grent_fp, old_offset, SEEK_SET);
+		if (error != ERANGE)
+			return nullptr;
+
+		const size_t new_size = s_grent_buffer_size * 2;
+		char* new_buffer = static_cast<char*>(realloc(s_grent_buffer, new_size));
+		if (new_buffer == nullptr)
+			return nullptr;
+
+		s_grent_buffer = new_buffer;
+		s_grent_buffer_size = new_size;
+	}
+
+	return result;
 }
 
 struct group* getgrgid(gid_t gid)
 {
-	if (s_group_mmap == nullptr || s_group_mmap == MAP_FAILED)
-		if (!open_group_file())
+	group* grp;
+	setgrent();
+	while ((grp = getgrent()))
+		if (grp->gr_gid == gid)
+			return grp;
 	return nullptr;
+}
 
-	off_t start = 0;
-	off_t end = 0;
-	while (start < s_group_st.st_size)
+struct group* getgrnam(const char* name)
 {
-		while (end < s_group_st.st_size && s_group_mmap[end] != '\n')
-			end++;
-
-		BAN::StringView line(s_group_mmap + start, end - start);
-		start = ++end;
-
-		auto parts_or_error = line.split(':', true);
-		if (parts_or_error.is_error())
-			return nullptr;
-
-		auto parts = parts_or_error.release_value();
-		if (parts.size() == 4 && parse_id(parts[2]) == gid)
-			return fill_group(parts);
-	}
-
+	group* grp;
+	setgrent();
+	while ((grp = getgrent()))
+		if (strcmp(grp->gr_name, name) == 0)
+			return grp;
 	return nullptr;
 }
+
+int getgrgid_r(gid_t gid, struct group* grp, char* buffer, size_t bufsize, struct group** result)
+{
+	FILE* fp = fopen("/etc/group", "r");
+	if (fp == nullptr)
+		return errno;
+
+	int ret = 0;
+	for (;;)
+	{
+		if ((ret = getgrent_impl(fp, grp, buffer, bufsize, result)))
+			break;
+		if (*result == nullptr)
+			break;
+		if (grp->gr_gid == gid)
+			break;
+	}
+
+	fclose(fp);
+	return ret;
+}
+
+int getgrnam_r(const char* name, struct group* grp, char* buffer, size_t bufsize, struct group** result)
+{
+	FILE* fp = fopen("/etc/group", "r");
+	if (fp == nullptr)
+		return errno;
+
+	int ret = 0;
+	for (;;)
+	{
+		if ((ret = getgrent_impl(fp, grp, buffer, bufsize, result)))
+			break;
+		if (*result == nullptr)
+			break;
+		if (strcmp(grp->gr_name, name) == 0)
+			break;
+	}
+
+	fclose(fp);
+	return ret;
+}

userspace/libraries/LibC/icxxabi.cpp

@@ -1,5 +1,7 @@
-#include <stddef.h>
 #include <limits.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
 
 struct atexit_func_entry_t
 {
@@ -8,19 +10,52 @@ struct atexit_func_entry_t
 	void* dso_handle;
 };
 
-static atexit_func_entry_t s_atexit_funcs[ATEXIT_MAX];
+static atexit_func_entry_t s_atexit_funcs_storage[ATEXIT_MAX];
+static atexit_func_entry_t* s_atexit_funcs = s_atexit_funcs_storage;
+static size_t s_atexit_funcs_capacity = ATEXIT_MAX;
 static size_t s_atexit_func_count = 0;
+static pthread_mutex_t s_atexit_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 extern "C" int __cxa_atexit(void(*func)(void*), void* arg, void* dso_handle)
 {
-	if (s_atexit_func_count >= ATEXIT_MAX)
-		return -1;
+	pthread_mutex_lock(&s_atexit_mutex);
+
+	if (s_atexit_func_count >= s_atexit_funcs_capacity)
+	{
+		const size_t new_capacity = s_atexit_funcs_capacity * 2;
+
+		void* new_funcs = nullptr;
+
+		if (s_atexit_funcs == s_atexit_funcs_storage)
+		{
+			new_funcs = malloc(new_capacity * sizeof(atexit_func_entry_t));
+			if (new_funcs == nullptr)
+				goto __cxa_atexit_error;
+			memcpy(new_funcs, s_atexit_funcs, s_atexit_func_count * sizeof(atexit_func_entry_t));
+		}
+		else
+		{
+			new_funcs = realloc(s_atexit_funcs, new_capacity * sizeof(atexit_func_entry_t));
+			if (new_funcs == nullptr)
+				goto __cxa_atexit_error;
+		}
+
+		s_atexit_funcs = reinterpret_cast<atexit_func_entry_t*>(new_funcs);
+		s_atexit_funcs_capacity = new_capacity;
+	}
+
 	s_atexit_funcs[s_atexit_func_count++] = {
 		.func = func,
 		.arg = arg,
 		.dso_handle = dso_handle,
 	};
+
+	pthread_mutex_unlock(&s_atexit_mutex);
 	return 0;
+
+__cxa_atexit_error:
+	pthread_mutex_unlock(&s_atexit_mutex);
+	return -1;
 };
 
 extern "C" void __cxa_finalize(void* dso_handle)

userspace/libraries/LibC/include/bits/inet_common.h

@@ -5,7 +5,7 @@
 
 __BEGIN_DECLS
 
-#include <inttypes.h>
+#include <stdint.h>
 
 #define INET_ADDRSTRLEN  16
 #define INET6_ADDRSTRLEN 46

userspace/libraries/LibC/include/bits/types/pthread_types.h

@@ -10,6 +10,8 @@ __BEGIN_DECLS
 #include <bits/types/pthread_attr_t.h>
 #include <bits/types/pthread_t.h>
 
+#include <stdint.h>
+
 typedef int pthread_once_t;
 
 typedef unsigned pthread_key_t;
@@ -28,17 +30,6 @@ typedef struct
 	unsigned lock_depth;
 } pthread_mutex_t;
 
-typedef struct
-{
-	int shared;
-} pthread_barrierattr_t;
-typedef struct
-{
-	pthread_barrierattr_t attr;
-	unsigned target;
-	unsigned waiting;
-} pthread_barrier_t;
-
 typedef struct
 {
 	int clock;
@@ -47,7 +38,7 @@ typedef struct
 struct _pthread_cond_block
 {
 	struct _pthread_cond_block* next;
-	int signaled;
+	uint32_t futex;
 };
 typedef struct
 {
@@ -56,6 +47,20 @@ typedef struct
 	struct _pthread_cond_block* block_list;
 } pthread_cond_t;
 
+typedef struct
+{
+	int shared;
+} pthread_barrierattr_t;
+typedef struct
+{
+	pthread_barrierattr_t attr;
+	pthread_mutex_t lock;
+	pthread_cond_t cond;
+	unsigned target;
+	unsigned waiting;
+	unsigned generation;
+} pthread_barrier_t;
+
 typedef struct
 {
 	int shared;

userspace/libraries/LibC/include/grp.h

@@ -14,6 +14,7 @@ __BEGIN_DECLS
 struct group
 {
 	char* gr_name;   /* The name of the group. */
+	char* gr_passwd;/* The password of the group */
 	gid_t gr_gid;    /* Numerical group ID. */
 	char** gr_mem;   /* Pointer to a null-terminated array of character pointers to member names. */
 };
@@ -21,7 +22,7 @@ struct group
 void			endgrent(void);
 struct group*	getgrent(void);
 struct group*	getgrgid(gid_t gid);
-int				getgrgit_r(gid_t gid, struct group* grp, char* buffer, size_t bufsize, struct group** result);
+int				getgrgid_r(gid_t gid, struct group* grp, char* buffer, size_t bufsize, struct group** result);
 struct group*	getgrnam(const char* name);
 int				getgrnam_r(const char* name, struct group* grp, char* buffer, size_t bufsize, struct group** result);
 void			setgrent(void);

userspace/libraries/LibC/include/limits.h

@@ -79,7 +79,7 @@ __BEGIN_DECLS
 #define LOGIN_NAME_MAX                256
 #define MQ_OPEN_MAX                   _POSIX_MQ_OPEN_MAX
 #define MQ_PRIO_MAX                   _POSIX_MQ_PRIO_MAX
-#define OPEN_MAX                      64
+#define OPEN_MAX                      128
 #define PAGESIZE                      PAGE_SIZE
 #define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
 #define PTHREAD_KEYS_MAX              _POSIX_THREAD_KEYS_MAX

userspace/libraries/LibC/include/netdb.h

@@ -9,7 +9,6 @@ __BEGIN_DECLS
 
 #include <netinet/in.h>
 #include <sys/socket.h>
-#include <inttypes.h>
 
 #define IPPORT_RESERVED 1024
 

userspace/libraries/LibC/include/pthread.h

@@ -87,6 +87,20 @@ struct uthread
 #define _PTHREAD_ATFORK_CHILD   2
 void _pthread_call_atfork(int state);
 
+#if defined(__x86_64__)
+#define _get_uthread() ({ \
+		struct uthread* __tmp; \
+		asm volatile("movq %%fs:0, %0" : "=r"(__tmp)); \
+		__tmp; \
+	})
+#elif defined(__i686__)
+#define _get_uthread() ({ \
+		struct uthread* __tmp; \
+		asm volatile("movl %%gs:0, %0" : "=r"(__tmp)); \
+		__tmp; \
+	})
+#endif
+
 int			pthread_atfork(void (*prepare)(void), void (*parent)(void), void(*child)(void));
 int			pthread_attr_destroy(pthread_attr_t* attr);
 int			pthread_attr_getdetachstate(const pthread_attr_t* attr, int* detachstate);

userspace/libraries/LibC/include/signal.h

@@ -134,8 +134,9 @@ struct sigevent
 #define SA_NODEFER   0x040
 #define SS_ONSTACK   0x080
 #define SS_DISABLE   0x100
-#define MINSIGSTKSZ  0x200
-#define SIGSTKSZ     0x400
+
+#define MINSIGSTKSZ  4096
+#define SIGSTKSZ     4096
 
 typedef struct
 {

userspace/libraries/LibC/include/stdlib.h

@@ -44,6 +44,7 @@ void				_Exit(int status) __attribute__((__noreturn__));
 long				a64l(const char* s);
 void				abort(void) __attribute__((__noreturn__));
 int					abs(int i);
+void*				aligned_alloc(size_t alignment, size_t size);
 int					atexit(void (*func)(void));
 double				atof(const char* str);
 int					atoi(const char* str);

userspace/libraries/LibC/include/sys/futex.h

@@ -0,0 +1,45 @@
+#ifndef _SYS_FUTEX_H
+#define _SYS_FUTEX_H 1
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#include <stdint.h>
+#include <time.h>
+
+#define FUTEX_WAIT     0
+#define FUTEX_WAKE     1
+#define FUTEX_PRIVATE  0x10
+#define FUTEX_REALTIME 0x20
+
+#define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE)
+#define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE)
+
+// op is one of FUTEX_WAIT or FUTEX_WAKE optionally or'ed with FUTEX_PRIVATE and/or FUTEX_REALTIME
+//
+// FUTEX_WAIT
+//   put current thread to sleep until *addr != value or until timeout occurs
+//   timeout is specified as a absolute time or NULL for indefinite wait
+//
+// FUTEX_WAKE
+//   signals waiting futexes to recheck *addr. at most value threads are woken up
+//
+// FUTEX_PRIVATE
+//   limit futex wait/wake events to the current process
+//
+// FUTEX_REALTIME
+//   abstime corresponds to CLOCK_REALTIME instead of the default CLOCK_MONOTONIC
+//
+// ERRORS
+//   ETIMEDOUT timeout occured
+//   EINVAL    addr is not aligned on 4 byte boundary
+//   ENOSYS    op contains unrecognized value
+//   EINTR     function was interrupted
+//   ENOMEM    not enough memory to allocate futex object
+//   EAGAIN    *addr != value before thread was put to sleep
+int futex(int op, const uint32_t* addr, uint32_t value, const struct timespec* abstime);
+
+__END_DECLS
+
+#endif

userspace/libraries/LibC/include/sys/mman.h

@@ -16,6 +16,7 @@ __BEGIN_DECLS
 #define MAP_PRIVATE		0x02
 #define MAP_SHARED		0x04
 #define MAP_ANONYMOUS	0x08
+#define MAP_ANON		MAP_ANONYMOUS
 
 #define MS_ASYNC		0x01
 #define MS_INVALIDATE	0x02

userspace/libraries/LibC/include/sys/socket.h

@@ -25,7 +25,7 @@ __BEGIN_DECLS
 struct sockaddr
 {
 	sa_family_t	sa_family;	/* Address family. */
-	char		sa_data[];	/* Socket address (variable-length data). */
+	char		sa_data[0];	/* Socket address (variable-length data). */
 };
 
 struct sockaddr_storage

userspace/libraries/LibC/include/sys/syscall.h

@@ -52,6 +52,7 @@ __BEGIN_DECLS
 	O(SYS_SYNC,				sync)			\
 	O(SYS_MMAP,				mmap)			\
 	O(SYS_MUNMAP,			munmap) 		\
+	O(SYS_MPROTECT,			mprotect) 		\
 	O(SYS_TTY_CTRL,			tty_ctrl)		\
 	O(SYS_POWEROFF,			poweroff)		\
 	O(SYS_FCHMODAT,			fchmodat)		\
@@ -108,6 +109,8 @@ __BEGIN_DECLS
 	O(SYS_EPOLL_CTL,		epoll_ctl)		\
 	O(SYS_EPOLL_PWAIT2,		epoll_pwait2)	\
 	O(SYS_FLOCK,			flock)			\
+	O(SYS_GET_NPROCESSOR,	get_nprocessor)	\
+	O(SYS_FUTEX,			futex)			\
 
 enum Syscall
 {

userspace/libraries/LibC/include/unistd.h

@@ -342,6 +342,10 @@ enum
 #define _SC_MQ_PRIO_MAX _SC_MQ_PRIO_MAX
 	_SC_NGROUPS_MAX,
 #define _SC_NGROUPS_MAX _SC_NGROUPS_MAX
+	_SC_NPROCESSORS_CONF,
+#define _SC_NPROCESSORS_CONF _SC_NPROCESSORS_CONF
+	_SC_NPROCESSORS_ONLN,
+#define _SC_NPROCESSORS_ONLN _SC_NPROCESSORS_ONLN
 	_SC_OPEN_MAX,
 #define _SC_OPEN_MAX _SC_OPEN_MAX
 	_SC_PAGE_SIZE,

userspace/libraries/LibC/malloc.cpp

@@ -338,14 +338,14 @@ void* calloc(size_t nmemb, size_t size)
 	return ptr;
 }
 
-int posix_memalign(void** memptr, size_t alignment, size_t size)
+void* aligned_alloc(size_t alignment, size_t size)
 {
-	dprintln_if(DEBUG_MALLOC, "posix_memalign({}, {})", alignment, size);
+	dprintln_if(DEBUG_MALLOC, "aligned_alloc({}, {})", alignment, size);
 
 	if (alignment < sizeof(void*) || alignment % sizeof(void*) || !BAN::Math::is_power_of_two(alignment / sizeof(void*)))
 	{
 		errno = EINVAL;
-		return -1;
+		return nullptr;
 	}
 
 	if (alignment < s_malloc_default_align)
@@ -353,7 +353,7 @@ int posix_memalign(void** memptr, size_t alignment, size_t size)
 
 	void* unaligned = malloc(size + alignment + sizeof(malloc_node_t));
 	if (unaligned == nullptr)
-		return -1;
+		return nullptr;
 
 	pthread_mutex_lock(&s_malloc_mutex);
 
@@ -395,6 +395,11 @@ int posix_memalign(void** memptr, size_t alignment, size_t size)
 	pthread_mutex_unlock(&s_malloc_mutex);
 
 	assert(((uintptr_t)node->data & (alignment - 1)) == 0);
-	*memptr = node->data;
-	return 0;
+	return node->data;
+}
+
+int posix_memalign(void** memptr, size_t alignment, size_t size)
+{
+	dprintln_if(DEBUG_MALLOC, "posix_memalign({}, {})", alignment, size);
+	return (*memptr = aligned_alloc(alignment, size)) ? 0 : -1;
 }

userspace/libraries/LibC/netinet/in.cpp

@@ -0,0 +1,4 @@
+#include <netinet/in.h>
+
+const struct in6_addr in6addr_any      = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+const struct in6_addr in6addr_loopback = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };

userspace/libraries/LibC/pthread.cpp

@@ -10,6 +10,7 @@
 #include <pthread.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/futex.h>
 #include <sys/mman.h>
 #include <sys/syscall.h>
 #include <unistd.h>
@@ -54,17 +55,6 @@ extern "C" void _pthread_trampoline_cpp(void* arg)
 	ASSERT_NOT_REACHED();
 }
 
-uthread* _get_uthread()
-{
-	uthread* result;
-#if ARCH(x86_64)
-	asm volatile("movq %%fs:0, %0" : "=r"(result));
-#elif ARCH(i686)
-	asm volatile("movl %%gs:0, %0" : "=r"(result));
-#endif
-	return result;
-}
-
 static void free_uthread(uthread* uthread)
 {
 	if (uthread->dtv[0] == 0)
@@ -105,58 +95,95 @@ void pthread_cleanup_push(void (*routine)(void*), void* arg)
 	uthread->cleanup_stack = cleanup;
 }
 
-static thread_local struct {
-	void* value;
-	void (*destructor)(void*);
-} s_pthread_keys[PTHREAD_KEYS_MAX] {};
-static thread_local uint8_t s_pthread_keys_allocated[(PTHREAD_KEYS_MAX + 7) / 8];
-
-static inline bool is_pthread_key_allocated(pthread_key_t key)
+static thread_local struct
 {
-	if (key >= PTHREAD_KEYS_MAX)
-		return false;
-	return s_pthread_keys_allocated[key / 8] & (1 << (key % 8));
-}
+	void* value;
+	pthread_key_t key;
+} s_pthread_key_values[PTHREAD_KEYS_MAX] {};
+
+static pthread_key_t s_pthread_key_current = 1;
+static pthread_key_t s_pthread_key_map[PTHREAD_KEYS_MAX] {};
+static void (*s_pthread_key_destructors[PTHREAD_KEYS_MAX])(void*) {};
+static pthread_spinlock_t s_pthread_key_lock = PTHREAD_SPIN_INITIALIZER;
 
 int pthread_key_create(pthread_key_t* key, void (*destructor)(void*))
 {
-	for (pthread_key_t i = 0; i < PTHREAD_KEYS_MAX; i++)
-	{
-		if (is_pthread_key_allocated(i))
-			continue;
-		s_pthread_keys[i].value = nullptr;
-		s_pthread_keys[i].destructor = destructor;
-		s_pthread_keys_allocated[i / 8] |= 1 << (i % 8);
-		*key = i;
-		return 0;
-	}
+	int ret = EAGAIN;
 
-	return EAGAIN;
+	pthread_spin_lock(&s_pthread_key_lock);
+	for (size_t i = 0; i < PTHREAD_KEYS_MAX; i++)
+	{
+		if (s_pthread_key_map[i])
+			continue;
+		s_pthread_key_destructors[i] = destructor;
+		s_pthread_key_map[i] = *key = s_pthread_key_current++;
+		ret = 0;
+		break;
+	}
+	pthread_spin_unlock(&s_pthread_key_lock);
+
+	return ret;
 }
 
 int pthread_key_delete(pthread_key_t key)
 {
-	if (!is_pthread_key_allocated(key))
-		return EINVAL;
-	s_pthread_keys[key].value = nullptr;
-	s_pthread_keys[key].destructor = nullptr;
-	s_pthread_keys_allocated[key / 8] &= ~(1 << (key % 8));
-	return 0;
+	int ret = EINVAL;
+
+	pthread_spin_lock(&s_pthread_key_lock);
+	for (size_t i = 0; i < PTHREAD_KEYS_MAX; i++)
+	{
+		if (s_pthread_key_map[i] != key)
+			continue;
+		s_pthread_key_destructors[i] = nullptr;
+		s_pthread_key_map[i] = 0;
+		ret = 0;
+		break;
+	}
+	pthread_spin_unlock(&s_pthread_key_lock);
+
+	return ret;
 }
 
 void* pthread_getspecific(pthread_key_t key)
 {
-	if (!is_pthread_key_allocated(key))
-		return nullptr;
-	return s_pthread_keys[key].value;
+	void* ret = nullptr;
+
+	pthread_spin_lock(&s_pthread_key_lock);
+	for (size_t i = 0; i < PTHREAD_KEYS_MAX; i++)
+	{
+		if (s_pthread_key_map[i] != key)
+			continue;
+		if (s_pthread_key_values[i].key != key)
+		{
+			s_pthread_key_values[i].key = key;
+			s_pthread_key_values[i].value = nullptr;
+		}
+		ret = s_pthread_key_values[i].value;
+		break;
+	}
+	pthread_spin_unlock(&s_pthread_key_lock);
+
+	return ret;
 }
 
 int pthread_setspecific(pthread_key_t key, const void* value)
 {
-	if (!is_pthread_key_allocated(key))
-		return EINVAL;
-	s_pthread_keys[key].value = const_cast<void*>(value);
-	return 0;
+	int ret = EINVAL;
+
+	pthread_spin_lock(&s_pthread_key_lock);
+	for (size_t i = 0; i < PTHREAD_KEYS_MAX; i++)
+	{
+		if (s_pthread_key_map[i] != key)
+			continue;
+		if (s_pthread_key_values[i].key != key)
+			s_pthread_key_values[i].key = key;
+		s_pthread_key_values[i].value = const_cast<void*>(value);
+		ret = 0;
+		break;
+	}
+	pthread_spin_unlock(&s_pthread_key_lock);
+
+	return ret;
 }
 
 int pthread_attr_destroy(pthread_attr_t* attr)
@@ -414,15 +441,22 @@ void pthread_exit(void* value_ptr)
 	for (size_t iteration = 0; iteration < PTHREAD_DESTRUCTOR_ITERATIONS; iteration++)
 	{
 		bool called = false;
-		for (pthread_key_t i = 0; i < PTHREAD_KEYS_MAX; i++)
+		for (size_t i = 0; i < PTHREAD_KEYS_MAX; i++)
 		{
-			if (!is_pthread_key_allocated(i))
+			void (*destructor)(void*) = nullptr;
+			void* value = nullptr;
+
+			pthread_spin_lock(&s_pthread_key_lock);
+			if (s_pthread_key_map[i] && s_pthread_key_values[i].key == s_pthread_key_map[i])
+			{
+				destructor = s_pthread_key_destructors[i];
+				value = s_pthread_key_values[i].value;
+			}
+			pthread_spin_unlock(&s_pthread_key_lock);
+
+			if (!value || !destructor)
 				continue;
-			if (!s_pthread_keys[i].value || !s_pthread_keys[i].destructor)
-				continue;
-			void* old_value = s_pthread_keys[i].value;
-			s_pthread_keys[i].value = nullptr;
-			s_pthread_keys[i].destructor(old_value);
+			destructor(value);
 			called = true;
 		}
 		if (!called)
@@ -442,7 +476,14 @@ int pthread_equal(pthread_t t1, pthread_t t2)
 int pthread_join(pthread_t thread, void** value_ptr)
 {
 	pthread_testcancel();
-	return syscall(SYS_PTHREAD_JOIN, thread, value_ptr);
+
+	errno = 0;
+	while (syscall(SYS_PTHREAD_JOIN, thread, value_ptr) == -1 && errno == EINTR)
+	{
+		pthread_testcancel();
+		errno = 0;
+	}
+	return errno;
 }
 
 pthread_t pthread_self(void)
@@ -478,6 +519,9 @@ static pthread_mutex_t s_atfork_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 void _pthread_call_atfork(int state)
 {
+	if (state == _PTHREAD_ATFORK_CHILD)
+		_get_uthread()->id = syscall(SYS_PTHREAD_SELF);
+
 	pthread_mutex_lock(&s_atfork_mutex);
 
 	pthread_atfork_t* list = nullptr;
@@ -1070,7 +1114,12 @@ int pthread_cond_broadcast(pthread_cond_t* cond)
 {
 	pthread_spin_lock(&cond->lock);
 	for (auto* block = cond->block_list; block; block = block->next)
-		BAN::atomic_store(block->signaled, 1);
+	{
+		BAN::atomic_store(block->futex, 1);
+
+		const int op = FUTEX_WAKE | (cond->attr.shared ? 0 : FUTEX_PRIVATE);
+		futex(op, &block->futex, 1, nullptr);
+	}
 	pthread_spin_unlock(&cond->lock);
 	return 0;
 }
@@ -1078,8 +1127,13 @@ int pthread_cond_broadcast(pthread_cond_t* cond)
 int pthread_cond_signal(pthread_cond_t* cond)
 {
 	pthread_spin_lock(&cond->lock);
-	if (cond->block_list)
-		BAN::atomic_store(cond->block_list->signaled, 1);
+	if (auto* block = cond->block_list)
+	{
+		BAN::atomic_store(block->futex, 1);
+
+		const int op = FUTEX_WAKE | (cond->attr.shared ? 0 : FUTEX_PRIVATE);
+		futex(op, &block->futex, 1, nullptr);
+	}
 	pthread_spin_unlock(&cond->lock);
 	return 0;
 }
@@ -1094,35 +1148,26 @@ int pthread_cond_timedwait(pthread_cond_t* __restrict cond, pthread_mutex_t* __r
 {
 	pthread_testcancel();
 
-	constexpr auto has_timed_out =
-		[](const struct timespec* abstime, clockid_t clock_id) -> bool
-		{
-			if (abstime == nullptr)
-				return false;
-			struct timespec curtime;
-			clock_gettime(clock_id, &curtime);
-			if (curtime.tv_sec < abstime->tv_sec)
-				return false;
-			if (curtime.tv_sec > abstime->tv_sec)
-				return true;
-			return curtime.tv_nsec >= abstime->tv_nsec;
-		};
-
 	pthread_spin_lock(&cond->lock);
 	_pthread_cond_block block = {
 		.next = cond->block_list,
-		.signaled = 0,
+		.futex = 0,
 	};
 	cond->block_list = &block;
 	pthread_spin_unlock(&cond->lock);
 
 	pthread_mutex_unlock(mutex);
 
-	while (BAN::atomic_load(block.signaled) == 0)
+	while (BAN::atomic_load(block.futex) == 0)
 	{
-		if (has_timed_out(abstime, cond->attr.clock))
+		const int op = FUTEX_WAIT
+			| (cond->attr.shared ? 0 : FUTEX_PRIVATE)
+			| (cond->attr.clock == CLOCK_REALTIME ? FUTEX_REALTIME : 0);
+		if (futex(op, &block.futex, 0, abstime) == -1 && errno == ETIMEDOUT)
+		{
+			pthread_mutex_lock(mutex);
 			return ETIMEDOUT;
-		sched_yield();
+		}
 	}
 
 	pthread_spin_lock(&cond->lock);
@@ -1192,28 +1237,34 @@ int pthread_barrier_init(pthread_barrier_t* __restrict barrier, const pthread_ba
 		attr = &default_attr;
 	*barrier = {
 		.attr = *attr,
+		.lock = PTHREAD_MUTEX_INITIALIZER,
+		.cond = PTHREAD_COND_INITIALIZER,
 		.target = count,
 		.waiting = 0,
+		.generation = 0,
 	};
 	return 0;
 }
 
 int pthread_barrier_wait(pthread_barrier_t* barrier)
 {
-	const unsigned index = BAN::atomic_add_fetch(barrier->waiting, 1);
+	pthread_mutex_lock(&barrier->lock);
 
-	// FIXME: this case should be handled, but should be relatively uncommon
-	//        so i'll just roll with the easy implementation
-	ASSERT(index <= barrier->target);
+	const auto gen = barrier->generation;
+	barrier->waiting++;
 
-	if (index == barrier->target)
+	if (barrier->waiting == barrier->target)
 	{
-		BAN::atomic_store(barrier->waiting, 0);
+		barrier->waiting = 0;
+		barrier->generation++;
+		pthread_cond_broadcast(&barrier->cond);
+		pthread_mutex_unlock(&barrier->lock);
 		return PTHREAD_BARRIER_SERIAL_THREAD;
 	}
 
-	while (BAN::atomic_load(barrier->waiting))
-		sched_yield();
+	while (barrier->generation == gen)
+		pthread_cond_wait(&barrier->cond, &barrier->lock);
+	pthread_mutex_unlock(&barrier->lock);
 	return 0;
 }
 

userspace/libraries/LibC/pwd.cpp

@@ -1,118 +1,142 @@
-#include <BAN/Assert.h>
-
 #include <ctype.h>
 #include <errno.h>
 #include <pwd.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 static FILE* s_pwent_fp = nullptr;
 static passwd s_pwent_struct;
 
-static bool open_pwent()
-{
-	if (s_pwent_fp)
-		return true;
-	s_pwent_fp = fopen("/etc/passwd", "r");
-	return s_pwent_fp;
-}
-
-static void clear_pwent(passwd& passwd)
-{
-	if (passwd.pw_name)
-		free(passwd.pw_name);
-	passwd.pw_name = nullptr;
-	if (passwd.pw_dir)
-		free(passwd.pw_dir);
-	passwd.pw_dir = nullptr;
-	if (passwd.pw_shell)
-		free(passwd.pw_shell);
-	passwd.pw_shell = nullptr;
-}
+static char* s_pwent_buffer = nullptr;
+static size_t s_pwent_buffer_size = 0;
 
 void endpwent(void)
 {
-	if (!s_pwent_fp)
-		return;
+	if (s_pwent_fp)
 		fclose(s_pwent_fp);
 	s_pwent_fp = nullptr;
-	clear_pwent(s_pwent_struct);
+
+	if (s_pwent_buffer)
+		free(s_pwent_buffer);
+	s_pwent_buffer = nullptr;
+}
+
+void setpwent(void)
+{
+	if (!s_pwent_fp)
+		return;
+	fseek(s_pwent_fp, 0, SEEK_SET);
+}
+
+static int getpwent_impl(FILE* fp, struct passwd* pwd, char* buffer, size_t bufsize, struct passwd** result)
+{
+	for (;;)
+	{
+		if (fgets(buffer, bufsize, fp) == nullptr)
+		{
+			if (ferror(fp))
+				return errno;
+			*result = nullptr;
+			return 0;
+		}
+
+		const size_t line_len = strlen(buffer);
+		if (line_len == 0)
+			continue;
+
+		if (buffer[line_len - 1] == '\n')
+			buffer[line_len - 1] = '\0';
+		else if (!feof(fp))
+			return (errno = ERANGE);
+
+#define GET_STRING() ({ \
+			ptr = strchr(ptr, ':'); \
+			if (ptr == nullptr) \
+				continue; \
+			*ptr++ = '\0'; \
+		})
+
+#define GET_INT() ({ \
+				if (!isdigit(*ptr)) \
+					continue; \
+				long val = 0; \
+				while (isdigit(*ptr)) \
+					val = (val * 10) + (*ptr++ - '0'); \
+				if (*ptr != ':') \
+					continue; \
+				*ptr++ = '\0'; \
+				val; \
+			})
+
+		char* ptr = buffer;
+
+		pwd->pw_name = ptr;
+		GET_STRING();
+
+		pwd->pw_passwd = ptr;
+		GET_STRING();
+
+		pwd->pw_uid = GET_INT();
+
+		pwd->pw_gid = GET_INT();
+
+		pwd->pw_gecos = ptr;
+		GET_STRING();
+
+		pwd->pw_dir = ptr;
+		GET_STRING();
+
+		pwd->pw_shell = ptr;
+
+		*result = pwd;
+		return 0;
+	}
 }
 
 struct passwd* getpwent(void)
 {
-	if (!s_pwent_fp)
-		if (!open_pwent())
-			return nullptr;
-	clear_pwent(s_pwent_struct);
-
-	static char buffer[4096];
-	if (!fgets(buffer, sizeof(buffer), s_pwent_fp))
-		return nullptr;
-
-	size_t buffer_len = strlen(buffer);
-
-	ASSERT(buffer[buffer_len - 1] == '\n');
-	buffer[buffer_len - 1] = '\0';
-	buffer_len--;
-
-	const char* ptr = buffer;
-	for (int i = 0; i < 7; i++)
+	if (s_pwent_fp == nullptr)
 	{
-		char* end = strchr(ptr, ':');
-		ASSERT((i < 6) ? end != nullptr : end == nullptr);
-		if (!end)
-			end = buffer + buffer_len;
-		*end = '\0';
-
-		const size_t field_len = end - ptr;
-
-		switch (i)
-		{
-			case 0:
-				s_pwent_struct.pw_name = strndup(ptr, field_len + 1);
-				if (!s_pwent_struct.pw_name)
+		s_pwent_fp = fopen("/etc/passwd", "r");
+		if (s_pwent_fp == nullptr)
 			return nullptr;
-				break;
-			case 1:
-				s_pwent_struct.pw_passwd = strndup(ptr, field_len + 1);
-				if (!s_pwent_struct.pw_passwd)
-					return nullptr;
-				break;
-			case 2:
-				ASSERT(1 <= field_len && field_len <= 9);
-				for (size_t j = 0; j < field_len; j++)
-					ASSERT(isdigit(ptr[j]));
-				s_pwent_struct.pw_uid = atoi(ptr);
-				break;
-			case 3:
-				ASSERT(1 <= field_len && field_len <= 9);
-				for (size_t j = 0; j < field_len; j++)
-					ASSERT(isdigit(ptr[j]));
-				s_pwent_struct.pw_gid = atoi(ptr);
-				break;
-			case 4:
-				s_pwent_struct.pw_gecos = strndup(ptr, field_len + 1);
-				if (!s_pwent_struct.pw_gecos)
-					return nullptr;
-				break;
-			case 5:
-				s_pwent_struct.pw_dir = strndup(ptr, field_len + 1);
-				if (!s_pwent_struct.pw_dir)
-					return nullptr;
-				break;
-			case 6:
-				s_pwent_struct.pw_shell = strndup(ptr, field_len + 1);
-				if (!s_pwent_struct.pw_shell)
-					return nullptr;
-				break;
 	}
 
-		ptr = end + 1;
+	if (s_pwent_buffer == nullptr)
+	{
+		long size = sysconf(_SC_GETPW_R_SIZE_MAX);
+		if (size == -1)
+			size = 512;
+
+		s_pwent_buffer = static_cast<char*>(malloc(size));
+		if (s_pwent_buffer == nullptr)
+			return nullptr;
+		s_pwent_buffer_size = size;
 	}
 
-	return &s_pwent_struct;
+	const off_t old_offset = ftello(s_pwent_fp);
+
+	passwd* result;
+	for (;;)
+	{
+		const int error = getpwent_impl(s_pwent_fp, &s_pwent_struct, s_pwent_buffer, s_pwent_buffer_size, &result);
+		if (error == 0)
+			break;
+		fseeko(s_pwent_fp, old_offset, SEEK_SET);
+		if (error != ERANGE)
+			return nullptr;
+
+		const size_t new_size = s_pwent_buffer_size * 2;
+		char* new_buffer = static_cast<char*>(realloc(s_pwent_buffer, new_size));
+		if (new_buffer == nullptr)
+			return nullptr;
+
+		s_pwent_buffer = new_buffer;
+		s_pwent_buffer_size = new_size;
+	}
+
+	return result;
 }
 
 struct passwd* getpwnam(const char* name)
@@ -135,9 +159,44 @@ struct passwd* getpwuid(uid_t uid)
 	return nullptr;
 }
 
-void setpwent(void)
+int getpwuid_r(uid_t uid, struct passwd* pwd, char* buffer, size_t bufsize, struct passwd** result)
 {
-	if (!s_pwent_fp)
-		return;
-	fseek(s_pwent_fp, 0, SEEK_SET);
+	FILE* fp = fopen("/etc/passwd", "r");
+	if (fp == nullptr)
+		return errno;
+
+	int ret = 0;
+	for (;;)
+	{
+		if ((ret = getpwent_impl(fp, pwd, buffer, bufsize, result)))
+			break;
+		if (*result == nullptr)
+			break;
+		if (pwd->pw_uid == uid)
+			break;
+	}
+
+	fclose(fp);
+	return ret;
+}
+
+int getpwnam_r(const char* name, struct passwd* pwd, char* buffer, size_t bufsize, struct passwd** result)
+{
+	FILE* fp = fopen("/etc/passwd", "r");
+	if (fp == nullptr)
+		return errno;
+
+	int ret = 0;
+	for (;;)
+	{
+		if ((ret = getpwent_impl(fp, pwd, buffer, bufsize, result)))
+			break;
+		if (*result == nullptr)
+			break;
+		if (strcmp(pwd->pw_name, name) == 0)
+			break;
+	}
+
+	fclose(fp);
+	return ret;
 }

userspace/libraries/LibC/stdio.cpp

@@ -542,6 +542,9 @@ int getc_unlocked(FILE* file)
 	if (file->eof)
 		return EOF;
 
+	if (file == stdin && file->buffer_type == _IOLBF && stdout->buffer_type == _IOLBF && stdout->buffer_idx)
+		fflush(stdout);
+
 	// read characters from ungetc
 	if (file->unget_buf_idx)
 	{

userspace/libraries/LibC/stdlib.cpp

@@ -570,6 +570,45 @@ int mblen(const char* s, size_t n)
 	ASSERT_NOT_REACHED();
 }
 
+int mbtowc(wchar_t* __restrict pwc, const char* __restrict s, size_t n)
+{
+	// no state-dependent encodings
+	if (s == nullptr)
+		return 0;
+
+	switch (__getlocale(LC_CTYPE))
+	{
+		case LOCALE_INVALID:
+			ASSERT_NOT_REACHED();
+		case LOCALE_POSIX:
+			if (pwc != nullptr)
+				*pwc = *s;
+			return *s ? 1 : 0;
+		case LOCALE_UTF8:
+			const auto* us = reinterpret_cast<const unsigned char*>(s);
+
+			const uint32_t length = BAN::UTF8::byte_length(*us);
+			if (length == BAN::UTF8::invalid || n < length)
+			{
+				errno = EILSEQ;
+				return -1;
+			}
+
+			const auto wch = BAN::UTF8::to_codepoint(us);
+			if (wch == BAN::UTF8::invalid)
+			{
+				errno = EILSEQ;
+				return -1;
+			}
+
+			if (pwc)
+				*pwc = wch;
+
+			return wch ? length : 0;
+	}
+	ASSERT_NOT_REACHED();
+}
+
 size_t mbstowcs(wchar_t* __restrict pwcs, const char* __restrict s, size_t n)
 {
 	size_t written = 0;

userspace/libraries/LibC/sys/futex.cpp

@@ -0,0 +1,12 @@
+#include <errno.h>
+#include <sys/futex.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+int futex(int op, const uint32_t* addr, uint32_t value, const struct timespec* abstime)
+{
+	errno = 0;
+	while (syscall(SYS_FUTEX, op, addr, value, abstime) == -1 && errno == EINTR)
+		errno = 0;
+	return errno;
+}

userspace/libraries/LibC/sys/mman.cpp

@@ -24,6 +24,11 @@ int munmap(void* addr, size_t len)
 	return syscall(SYS_MUNMAP, addr, len);
 }
 
+int mprotect(void* addr, size_t len, int prot)
+{
+	return syscall(SYS_MPROTECT, addr, len, prot);
+}
+
 int msync(void* addr, size_t len, int flags)
 {
 	pthread_testcancel();
@@ -45,8 +50,3 @@ int mlock(const void*, size_t)
 {
 	ASSERT_NOT_REACHED();
 }
-
-int mprotect(void*, size_t, int)
-{
-	ASSERT_NOT_REACHED();
-}

userspace/libraries/LibC/sys/socket.cpp

@@ -1,3 +1,6 @@
+#include <BAN/Debug.h>
+
+#include <errno.h>
 #include <pthread.h>
 #include <sys/socket.h>
 #include <sys/syscall.h>
@@ -33,7 +36,7 @@ int listen(int socket, int backlog)
 
 ssize_t recv(int socket, void* __restrict buffer, size_t length, int flags)
 {
-	pthread_testcancel();
+	// cancellation point in recvfrom
 	return recvfrom(socket, buffer, length, flags, nullptr, nullptr);
 }
 
@@ -53,7 +56,7 @@ ssize_t recvfrom(int socket, void* __restrict buffer, size_t length, int flags,
 
 ssize_t send(int socket, const void* message, size_t length, int flags)
 {
-	pthread_testcancel();
+	// cancellation point in sendto
 	return sendto(socket, message, length, flags, nullptr, 0);
 }
 
@@ -71,6 +74,74 @@ ssize_t sendto(int socket, const void* message, size_t length, int flags, const
 	return syscall(SYS_SENDTO, &arguments);
 }
 
+ssize_t	recvmsg(int socket, struct msghdr* message, int flags)
+{
+	if (CMSG_FIRSTHDR(message))
+	{
+		dwarnln("TODO: recvmsg ancillary data");
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	size_t total_recv = 0;
+
+	for (int i = 0; i < message->msg_iovlen; i++)
+	{
+		const ssize_t nrecv = recvfrom(
+			socket,
+			message->msg_iov[i].iov_base,
+			message->msg_iov[i].iov_len,
+			flags,
+			static_cast<sockaddr*>(message->msg_name),
+			&message->msg_namelen
+		);
+
+		if (nrecv < 0)
+			return -1;
+
+		total_recv += nrecv;
+
+		if (static_cast<size_t>(nrecv) < message->msg_iov[i].iov_len)
+			break;
+	}
+
+	return total_recv;
+}
+
+ssize_t	sendmsg(int socket, const struct msghdr* message, int flags)
+{
+	if (CMSG_FIRSTHDR(message))
+	{
+		dwarnln("TODO: sendmsg ancillary data");
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	size_t total_sent = 0;
+
+	for (int i = 0; i < message->msg_iovlen; i++)
+	{
+		const ssize_t nsend = sendto(
+			socket,
+			message->msg_iov[i].iov_base,
+			message->msg_iov[i].iov_len,
+			flags,
+			static_cast<sockaddr*>(message->msg_name),
+			message->msg_namelen
+		);
+
+		if (nsend < 0)
+			return -1;
+
+		total_sent += nsend;
+
+		if (static_cast<size_t>(nsend) < message->msg_iov[i].iov_len)
+			break;
+	}
+
+	return total_sent;
+}
+
 int socket(int domain, int type, int protocol)
 {
 	return syscall(SYS_SOCKET, domain, type, protocol);

userspace/libraries/LibC/sys/uio.cpp

@@ -9,7 +9,7 @@ ssize_t readv(int fildes, const struct iovec* iov, int iovcnt)
 	size_t result = 0;
 	for (int i = 0; i < iovcnt; i++)
 	{
-		uint8_t* base = static_cast<uint8_t*>(iov->iov_base);
+		uint8_t* base = static_cast<uint8_t*>(iov[i].iov_base);
 
 		size_t nread = 0;
 		while (nread < iov[i].iov_len)
@@ -33,7 +33,7 @@ ssize_t writev(int fildes, const struct iovec* iov, int iovcnt)
 	size_t result = 0;
 	for (int i = 0; i < iovcnt; i++)
 	{
-		const uint8_t* base = static_cast<const uint8_t*>(iov->iov_base);
+		const uint8_t* base = static_cast<const uint8_t*>(iov[i].iov_base);
 
 		size_t nwrite = 0;
 		while (nwrite < iov[i].iov_len)

userspace/libraries/LibC/unistd.cpp

@@ -787,12 +787,19 @@ char* getlogin(void)
 
 char* ttyname(int fildes)
 {
-	static char storage[_POSIX_TTY_NAME_MAX];
-	if (syscall(SYS_TTYNAME, fildes, storage) == -1)
+	static char storage[TTY_NAME_MAX];
+	if (ttyname_r(fildes, storage, sizeof(storage)) != 0)
 		return nullptr;
 	return storage;
 }
 
+int ttyname_r(int fildes, char* name, size_t namesize)
+{
+	if (syscall(SYS_TTYNAME, fildes, name, namesize))
+		return errno;
+	return 0;
+}
+
 int access(const char* path, int amode)
 {
 	return syscall(SYS_ACCESS, path, amode);
@@ -875,7 +882,35 @@ size_t confstr(int name, char* buf, size_t len)
 	return 0;
 }
 
-long pathconf(const char* path, int name);
+long fpathconf(int fd, int name)
+{
+	(void)fd;
+	switch (name)
+	{
+#define LIMIT_CASE(name) case _PC_##name: return name;
+		LIMIT_CASE(LINK_MAX)
+		LIMIT_CASE(MAX_CANON)
+		LIMIT_CASE(MAX_INPUT)
+		LIMIT_CASE(NAME_MAX)
+		LIMIT_CASE(PATH_MAX)
+		LIMIT_CASE(PIPE_BUF)
+#undef LIMIT_CASE
+#define POSIX_CASE(name) case _PC_##name: return _POSIX_##name;
+		POSIX_CASE(CHOWN_RESTRICTED)
+		POSIX_CASE(NO_TRUNC)
+		POSIX_CASE(VDISABLE)
+#undef POSIX_CASE
+	}
+
+	errno = EINVAL;
+	return 0;
+}
+
+long pathconf(const char* path, int name)
+{
+	(void)path;
+	return fpathconf(0, name);
+}
 
 long sysconf(int name)
 {
@@ -1015,6 +1050,9 @@ long sysconf(int name)
 		case _SC_PAGE_SIZE:
 		case _SC_PAGESIZE:         return getpagesize();
 
+		case _SC_NPROCESSORS_ONLN: return syscall(SYS_GET_NPROCESSOR);
+		case _SC_NPROCESSORS_CONF: return syscall(SYS_GET_NPROCESSOR);
+
 		case _SC_CLK_TCK:          return 100;
 		case _SC_GETGR_R_SIZE_MAX: return 1024;
 		case _SC_GETPW_R_SIZE_MAX: return 1024;

userspace/libraries/LibGUI/Window.cpp

@@ -142,10 +142,10 @@ namespace LibGUI
 			return on_socket_error(__FUNCTION__);
 	}
 
-	void Window::set_mouse_capture(bool captured)
+	void Window::set_mouse_relative(bool enabled)
 	{
-		WindowPacket::WindowSetMouseCapture packet;
-		packet.captured = captured;
+		WindowPacket::WindowSetMouseRelative packet;
+		packet.enabled = enabled;
 
 		if (auto ret = packet.send_serialized(m_server_fd); ret.is_error())
 			return on_socket_error(__FUNCTION__);

userspace/libraries/LibGUI/include/LibGUI/Packet.h

@@ -205,7 +205,7 @@ namespace LibGUI
 		WindowInvalidate,
 		WindowSetPosition,
 		WindowSetAttributes,
-		WindowSetMouseCapture,
+		WindowSetMouseRelative,
 		WindowSetSize,
 		WindowSetMinSize,
 		WindowSetMaxSize,
@@ -266,8 +266,8 @@ namespace LibGUI
 		);
 
 		DEFINE_PACKET(
-			WindowSetMouseCapture,
-			bool, captured
+			WindowSetMouseRelative,
+			bool, enabled
 		);
 
 		DEFINE_PACKET(

userspace/libraries/LibGUI/include/LibGUI/Window.h

@@ -43,7 +43,7 @@ namespace LibGUI
 		void invalidate(int32_t x, int32_t y, uint32_t width, uint32_t height);
 		void invalidate() { return invalidate(0, 0, width(), height()); }
 
-		void set_mouse_capture(bool captured);
+		void set_mouse_relative(bool enabled);
 		void set_fullscreen(bool fullscreen);
 		void set_title(BAN::StringView title);
 

userspace/programs/DynamicLoader/main.cpp

@@ -1200,21 +1200,32 @@ static void initialize_tls(MasterTLS master_tls)
 
 	memcpy(tls_addr, master_tls.addr, master_tls.size);
 
-	uthread* uthread = reinterpret_cast<struct uthread*>(tls_addr + master_tls.size);
-	uthread->self = uthread;
-	uthread->master_tls_addr = master_tls.addr;
-	uthread->master_tls_size = master_tls.size;
+	uthread& uthread = *reinterpret_cast<struct uthread*>(tls_addr + master_tls.size);
 
-	uthread->dtv[0] = master_tls.module_count;
+	// uthread is prepared in libc init, but some other stuff may be calling pthread functions
+	//   for example __cxa_guard_release calls pthread_cond_broadcast
+	uthread = {
+		.self = &uthread,
+		.master_tls_addr = master_tls.addr,
+		.master_tls_size = master_tls.size,
+		.cleanup_stack = nullptr,
+		.id = static_cast<pthread_t>(syscall<>(SYS_PTHREAD_SELF)),
+		.errno_ = 0,
+		.cancel_type = PTHREAD_CANCEL_DEFERRED,
+		.cancel_state = PTHREAD_CANCEL_ENABLE,
+		.canceled = false,
+	};
+
+	uthread.dtv[0] = master_tls.module_count;
 	for (size_t i = 0; i < s_loaded_file_count; i++)
 	{
 		const auto& elf = s_loaded_files[i];
 		if (elf.tls_addr == nullptr)
 			continue;
-		uthread->dtv[elf.tls_module] = reinterpret_cast<uintptr_t>(tls_addr) + uthread->master_tls_size - elf.tls_offset;
+		uthread.dtv[elf.tls_module] = reinterpret_cast<uintptr_t>(tls_addr) + uthread.master_tls_size - elf.tls_offset;
 	}
 
-	syscall(SYS_SET_TLS, uthread);
+	syscall(SYS_SET_TLS, &uthread);
 }
 
 static void initialize_environ(char** envp)
@@ -1352,6 +1363,9 @@ void* __dlopen(const char* file, int mode)
 
 	// FIXME: RTLD_{LOCAL,GLOBAL}
 
+	if (file == nullptr)
+		return &s_loaded_files[0];
+
 	char path_buffer[PATH_MAX];
 	if (!find_library(file, path_buffer))
 	{

userspace/programs/WindowServer/WindowServer.cpp

@@ -199,13 +199,13 @@ void WindowServer::on_window_set_attributes(int fd, const LibGUI::WindowPacket::
 		dwarnln("could not send window shown event: {}", ret.error());
 }
 
-void WindowServer::on_window_set_mouse_capture(int fd, const LibGUI::WindowPacket::WindowSetMouseCapture& packet)
+void WindowServer::on_window_set_mouse_relative(int fd, const LibGUI::WindowPacket::WindowSetMouseRelative& packet)
 {
-	if (m_is_mouse_captured && packet.captured)
+	if (m_is_mouse_relative && packet.enabled)
 	{
 		ASSERT(m_focused_window);
 		if (fd != m_focused_window->client_fd())
-			dwarnln("client tried to set mouse capture while other window has it already captured");
+			dwarnln("client tried to set mouse relative while other window has it already");
 		return;
 	}
 
@@ -221,11 +221,11 @@ void WindowServer::on_window_set_mouse_capture(int fd, const LibGUI::WindowPacke
 		return;
 	}
 
-	if (packet.captured == m_is_mouse_captured)
+	if (packet.enabled == m_is_mouse_relative)
 		return;
 
 	set_focused_window(target_window);
-	m_is_mouse_captured = packet.captured;
+	m_is_mouse_relative = packet.enabled;
 	invalidate(cursor_area());
 }
 
@@ -490,7 +490,7 @@ void WindowServer::on_key_event(LibInput::KeyEvent event)
 
 void WindowServer::on_mouse_button(LibInput::MouseButtonEvent event)
 {
-	if (m_is_mouse_captured)
+	if (m_is_mouse_relative)
 	{
 		ASSERT(m_focused_window);
 
@@ -681,7 +681,7 @@ void WindowServer::on_mouse_move_impl(int32_t new_x, int32_t new_y)
 
 void WindowServer::on_mouse_move(LibInput::MouseMoveEvent event)
 {
-	if (m_is_mouse_captured)
+	if (m_is_mouse_relative)
 	{
 		ASSERT(m_focused_window);
 
@@ -712,7 +712,7 @@ void WindowServer::on_mouse_move(LibInput::MouseMoveEvent event)
 	}
 
 	const int32_t new_x = BAN::Math::clamp(m_cursor.x + event.rel_x, min_x, max_x);
-	const int32_t new_y = BAN::Math::clamp(m_cursor.y + event.rel_y, min_y, max_y);
+	const int32_t new_y = BAN::Math::clamp(m_cursor.y - event.rel_y, min_y, max_y);
 	return on_mouse_move_impl(new_x, new_y);
 }
 
@@ -724,6 +724,12 @@ void WindowServer::on_mouse_move_abs(LibInput::MouseMoveAbsEvent event)
 			return (val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
 		};
 
+	if (m_is_mouse_relative)
+	{
+		dwarnln("relative mouse not supported with absolute mouse");
+		return;
+	}
+
 	int32_t out_min_x, out_max_x;
 	int32_t out_min_y, out_max_y;
 
@@ -767,9 +773,9 @@ void WindowServer::set_focused_window(BAN::RefPtr<Window> window)
 	if (m_focused_window == window)
 		return;
 
-	if (m_is_mouse_captured)
+	if (m_is_mouse_relative)
 	{
-		m_is_mouse_captured = false;
+		m_is_mouse_relative = false;
 		invalidate(cursor_area());
 	}
 
@@ -903,7 +909,7 @@ void WindowServer::invalidate(Rectangle area)
 			mark_pending_sync(dst_area);
 		}
 
-		if (!m_is_mouse_captured)
+		if (!m_is_mouse_relative)
 		{
 			auto cursor_area = this->cursor_area();
 			cursor_area.x -= m_focused_window->client_x();
@@ -1140,7 +1146,7 @@ void WindowServer::invalidate(Rectangle area)
 		}
 	}
 
-	if (!m_is_mouse_captured)
+	if (!m_is_mouse_relative)
 	{
 		if (const auto overlap = cursor_area().get_overlap(area); overlap.has_value())
 		{
@@ -1355,8 +1361,8 @@ BAN::RefPtr<Window> WindowServer::find_window_with_fd(int fd) const
 
 BAN::RefPtr<Window> WindowServer::find_hovered_window() const
 {
-	for (auto window : m_client_windows)
-		if (window->full_area().contains(m_cursor))
+	for (size_t i = m_client_windows.size(); i > 0; i--)
+		if (auto window = m_client_windows[i - 1]; window->client_area().contains(m_cursor))
 			return window;
 	return {};
 }

userspace/programs/WindowServer/WindowServer.h

@@ -35,7 +35,7 @@ public:
 	void on_window_invalidate(int fd, const LibGUI::WindowPacket::WindowInvalidate&);
 	void on_window_set_position(int fd, const LibGUI::WindowPacket::WindowSetPosition&);
 	void on_window_set_attributes(int fd, const LibGUI::WindowPacket::WindowSetAttributes&);
-	void on_window_set_mouse_capture(int fd, const LibGUI::WindowPacket::WindowSetMouseCapture&);
+	void on_window_set_mouse_relative(int fd, const LibGUI::WindowPacket::WindowSetMouseRelative&);
 	void on_window_set_size(int fd, const LibGUI::WindowPacket::WindowSetSize&);
 	void on_window_set_min_size(int fd, const LibGUI::WindowPacket::WindowSetMinSize&);
 	void on_window_set_max_size(int fd, const LibGUI::WindowPacket::WindowSetMaxSize&);
@@ -112,7 +112,7 @@ private:
 	uint8_t m_resize_quadrant { 0 };
 	Position m_resize_start;
 
-	bool m_is_mouse_captured { false };
+	bool m_is_mouse_relative { false };
 
 	bool m_deleted_window { false };
 	bool m_is_stopped { false };

userspace/programs/WindowServer/main.cpp

@@ -368,7 +368,7 @@ int main()
 					WINDOW_PACKET_CASE(WindowInvalidate,       on_window_invalidate);
 					WINDOW_PACKET_CASE(WindowSetPosition,      on_window_set_position);
 					WINDOW_PACKET_CASE(WindowSetAttributes,    on_window_set_attributes);
-					WINDOW_PACKET_CASE(WindowSetMouseCapture, on_window_set_mouse_capture);
+					WINDOW_PACKET_CASE(WindowSetMouseRelative, on_window_set_mouse_relative);
 					WINDOW_PACKET_CASE(WindowSetSize,          on_window_set_size);
 					WINDOW_PACKET_CASE(WindowSetMinSize,       on_window_set_min_size);
 					WINDOW_PACKET_CASE(WindowSetMaxSize,       on_window_set_max_size);