Fix kernel compile warnings.

sortix/ata.cpp

@@ -118,7 +118,7 @@ ATABus::~ATABus()
 
 ATADrive* ATABus::Instatiate(unsigned driveid)
 {
-	if ( 1 < driveid ) { errno = EINVAL; return false; }
+	if ( 1 < driveid ) { errno = EINVAL; return NULL; }
 	curdriveid = 0;
 
 	uint8_t drivemagic = 0xA0 | (driveid << 4);
@@ -132,12 +132,12 @@ ATADrive* ATABus::Instatiate(unsigned driveid)
 	while ( true )
 	{
 		status = CPU::InPortB(iobase + STATUS);
-		if ( !status || status == 0xFF ) { errno = ENODEV; return false; }
+		if ( !status || status == 0xFF ) { errno = ENODEV; return NULL; }
 		if ( !(status & STATUS_BUSY) ) { break; }
 	}
 	if ( CPU::InPortB(iobase + LBA_MID) || CPU::InPortB(iobase + LBA_MID) )
 	{
-		errno = ENODEV; return false; // ATAPI device not following spec.
+		errno = ENODEV; return NULL; // ATAPI device not following spec.
 	}
 	while ( !(status & STATUS_DATAREADY) && !(status & STATUS_ERROR) )
 	{
@@ -164,7 +164,7 @@ ATADrive* ATABus::Instatiate(unsigned driveid)
 			//Log::PrintF("Error status during identify\n");
 		}
 		errno = EIO;
-		return false;
+		return NULL;
 	}
 	ATADrive* drive = new ATADrive(this, driveid, iobase, altport);
 	return drive;
@@ -198,13 +198,24 @@ ATADrive::ATADrive(ATABus* bus, unsigned driveid, uint16_t portoffset, uint16_t
 		meta[i] = CPU::InPortW(iobase + DATA);
 	}
 	lba48 = meta[META_FLAGS] & FLAG_LBA48;
+	numsectors = 0;
 	if ( lba48 )
 	{
-		numsectors = *((uint64_t*) (meta + META_LBA48));
+		numsectors = (uint64_t) meta[META_LBA48 + 0] <<  0
+				   | (uint64_t) meta[META_LBA48 + 1] <<  8
+				   | (uint64_t) meta[META_LBA48 + 2] << 16
+				   | (uint64_t) meta[META_LBA48 + 3] << 24
+				   | (uint64_t) meta[META_LBA48 + 4] << 32
+				   | (uint64_t) meta[META_LBA48 + 5] << 40
+				   | (uint64_t) meta[META_LBA48 + 6] << 48
+				   | (uint64_t) meta[META_LBA48 + 7] << 56;
 	}
 	else
 	{
-		numsectors = *((uint32_t*) (meta + META_LBA28));
+		numsectors = meta[META_LBA28 + 0] <<  0
+				   | meta[META_LBA28 + 1] <<  8
+				   | meta[META_LBA28 + 2] << 16
+				   | meta[META_LBA28 + 3] << 24;
 	}
 	sectorsize = 512; // TODO: Detect this!
 	Initialize();
@@ -275,7 +286,7 @@ bool ATADrive::ReadSector(off_t sector, uint8_t* dest)
 		destword[i] = CPU::InPortW(iobase + DATA);
 	}
 	Wait400NSecs(iobase);
-	uint8_t status = CPU::InPortB(iobase + STATUS);
+	CPU::InPortB(iobase + STATUS);
 	return true;
 }
 

sortix/descriptors.cpp

@@ -88,8 +88,7 @@ namespace Sortix
 			memcpy(newlist, devices, sizeof(*devices) * numdevices);
 		}
 
-		size_t numpadded = newlistlength-numdevices;
-		for ( size_t i = numdevices; i < newlistlength; i++ )
+		for ( int i = numdevices; i < newlistlength; i++ )
 			newlist[i].dev = NULL,
 			newlist[i].path = NULL,
 			newlist[i].flags = 0;

sortix/elf.cpp

@@ -140,6 +140,9 @@ namespace Sortix
 		addr_t Construct64(Process* process, const void* file, size_t filelen)
 		{
 			#ifndef PLATFORM_X64
+			(void) process;
+			(void) file;
+			(void) filelen;
 			errno = ENOEXEC;
 			return 0;
 			#else

sortix/initrd.cpp

@@ -41,6 +41,7 @@ uint8_t* initrd;
 size_t initrdsize;
 const initrd_superblock_t* sb;
 
+__attribute__((unused))
 static uint32_t HostModeToInitRD(mode_t mode)
 {
 	uint32_t result = mode & 0777; // Lower 9 bits per POSIX and tradition.
@@ -55,6 +56,7 @@ static uint32_t HostModeToInitRD(mode_t mode)
 	return result;
 }
 
+__attribute__((unused))
 static mode_t InitRDModeToHost(uint32_t mode)
 {
 	mode_t result = mode & 0777; // Lower 9 bits per POSIX and tradition.

sortix/kb/layout/us.cpp

@@ -145,7 +145,7 @@ namespace Sortix
 
 		// Check if the kbkey is outside the layout structure (not printable).
 		size_t numchars = sizeof(LAYOUT_US) / 4UL / sizeof(uint32_t);
-		if ( numchars < abskbkey ) { return 0; }
+		if ( numchars < (size_t) abskbkey ) { return 0; }
 
 		return LAYOUT_US[index];
 	}

sortix/kernel.cpp

@@ -122,6 +122,8 @@ static size_t TextTermHeight(void* user)
 
 extern "C" void KernelInit(unsigned long magic, multiboot_info_t* bootinfo)
 {
+	(void) magic;
+
 	// Initialize system calls.
 	Syscall::Init();
 
@@ -179,7 +181,7 @@ extern "C" void KernelInit(unsigned long magic, multiboot_info_t* bootinfo)
 		      "multiboot compliant?");
 	}
 
-	addr_t initrd = NULL;
+	addr_t initrd = 0;
 	size_t initrdsize = 0;
 
 	uint32_t* modules = (uint32_t*) (addr_t) bootinfo->mods_addr;

sortix/kthread.cpp

@@ -45,6 +45,7 @@ extern "C" void kthread_exit(void* /*param*/)
 {
 	Worker::Schedule(kthread_do_kill_thread, CurrentThread());
 	Scheduler::ExitThread();
+	__builtin_unreachable();
 }
 
 struct kthread_cond_elem

sortix/panic.cpp

@@ -94,12 +94,14 @@ namespace Sortix
 		if ( ENABLE_CALLTRACE ) { PanicCalltrace(); }
 	}
 
+	__attribute__((noreturn))
 	void PanicHalt()
 	{
 		#ifdef JSSORTIX
 		JSSortix::Exit();
 		#endif
 		HaltKernel();
+		__builtin_unreachable();
 	}
 
 	extern "C" void Panic(const char* Error)

sortix/process.cpp

@@ -510,6 +510,7 @@ namespace Sortix
 	                     int envc, const char* const* envp,
 	                     CPU::InterruptRegisters* regs)
 	{
+		(void) programname;
 		assert(CurrentProcess() == this);
 
 		addr_t entry = ELF::Construct(CurrentProcess(), program, programsize);
@@ -568,6 +569,8 @@ namespace Sortix
 
 	DevBuffer* OpenProgramImage(const char* progname, const char* wd, const char* path)
 	{
+		(void) wd;
+		(void) path;
 		char* abs = Directory::MakeAbsolute("/", progname);
 		if ( !abs ) { errno = ENOMEM; return NULL; }
 

sortix/serialterminal.cpp

@@ -64,7 +64,7 @@ namespace Sortix
 			int c;
 			while ( (c=UART::TryPopChar()) != -1 )
 			{
-				#warning Support for hooking the serial input up against the keyboard API have broken
+				// TODO: Support for hooking the serial input up against the keyboard API have broken
 				#if 0
 				// TODO: This is no longer compatible with the keyboard API, so
 				// it has been commented out. Besides, JSSortix isn't really
@@ -140,7 +140,7 @@ namespace Sortix
 
 		size_t Print(void* /*user*/, const char* string, size_t stringlen)
 		{
-			#warning Echoing to the VGA terminal is broken
+			// TODO: Echoing to the VGA terminal is broken
 #if 0
 			if ( ECHO_TO_VGA ) { VGATerminal::Print(NULL, string, stringlen); }
 #endif

sortix/string.cpp

@@ -45,7 +45,6 @@ char* Clone(const char* Input)
 
 char* Substring(const char* src, size_t offset, size_t length)
 {
-	size_t srclen = strlen(src);
 	char* dest = new char[length + 1];
 	if ( !dest ) { return NULL; }
 	memcpy(dest, src + offset, length * sizeof(char));

sortix/x64/memorymanagement.cpp

@@ -149,7 +149,7 @@ namespace Sortix
 			Page::Lock();
 
 			// In case any pages wasn't cleaned at this point.
-#warning Page::Put calls may internally Page::Get and then reusing pages we are not done with just yet
+			// TODO: Page::Put calls may internally Page::Get and then reusing pages we are not done with just yet
 			RecursiveFreeUserspacePages(TOPPMLLEVEL, 0);
 
 			// Switch to the address space from when the world was originally

sortix/x86-family/gdt.cpp

@@ -136,6 +136,7 @@ namespace Sortix
 			tss_entry.cs = 0x08 | 0x3;
 			tss_entry.ss = tss_entry.ds = tss_entry.es = tss_entry.fs = tss_entry.gs = 0x10 | 0x3;
 #elif defined(PLATFORM_X64)
+			(void) ss0;
 			tss_entry.stack0 = stack0;
 #endif
 		}
@@ -143,8 +144,12 @@ namespace Sortix
 		void SetKernelStack(addr_t stacklower, size_t stacksize, addr_t stackhigher)
 		{
 #ifdef PLATFORM_X86
+			(void) stacklower;
+			(void) stacksize;
 			tss_entry.esp0 = (uint32_t) stackhigher;
 #elif defined(PLATFORM_X64)
+			(void) stacklower;
+			(void) stacksize;
 			tss_entry.stack0 = (uint64_t) stackhigher;
 #else
 			#warning "TSS is not yet supported on this arch!"

sortix/x86-family/memorymanagement.cpp

@@ -136,8 +136,8 @@ namespace Sortix
 
 				// Give all the physical memory to the physical memory allocator
 				// but make sure not to give it things we already use.
-				addr_t regionstart = mmap->addr;
-				addr_t regionend = mmap->addr + mmap->len;
+				addr_t regionstart = base;
+				addr_t regionend = base + length;
 				addr_t processed = regionstart;
 				while ( processed < regionend )
 				{

sortix/x86/memorymanagement.cpp

@@ -46,7 +46,7 @@ namespace Sortix
 		{
 			PML* const BOOTPML2 = (PML* const) 0x11000UL;
 			PML* const BOOTPML1 = (PML* const) 0x12000UL;
-			PML* const FORKPML1 = (PML* const) 0x13000UL;
+			//PML* const FORKPML1 = (PML* const) 0x13000UL;
 			PML* const IDENPML1 = (PML* const) 0x14000UL;
 
 			// Initialize the memory structures with zeroes.
@@ -139,7 +139,7 @@ namespace Sortix
 			Page::Lock();
 
 			// In case any pages wasn't cleaned at this point.
-#warning Page::Put calls may internally Page::Get and then reusing pages we are not done with just yet
+			// TODO: Page::Put calls may internally Page::Get and then reusing pages we are not done with just yet
 			RecursiveFreeUserspacePages(TOPPMLLEVEL, 0);
 
 			// Switch to the address space from when the world was originally