kernel/arch/i686/Signal.S

@@ -7,26 +7,22 @@
 
 .global signal_trampoline
 signal_trampoline:
+	ud2
+
 	pushl %ebp
 	movl %esp, %ebp
+	subl $8, %esp
 
 	pusha
 
 	movl 40(%esp), %edi
 	movl 36(%esp), %eax
 
-	// align stack to 16 bytes
-	movl %esp, %ebx
-	andl $0x0F, %ebx
-	subl %ebx, %esp
-
 	subl $12, %esp
 	pushl %edi
 	call *%eax
 	addl $16, %esp
 
-	// restore stack
-	addl %ebx, %esp
 	popa
 
 	leave

kernel/arch/i686/boot.S

@@ -82,18 +82,9 @@ boot_pdpt:
 boot_pd:
 	.set i, 0
 	.rept 512
-		.long V2P(boot_pts) + i + (PG_READ_WRITE | PG_PRESENT)
+		.long i + (PG_PAGE_SIZE | PG_READ_WRITE | PG_PRESENT)
 		.long 0
-		.set i, i + 0x1000
-	.endr
-boot_pts:
-	.set i, 0
-	.rept 512
-		.rept 512
-			.long i + (PG_READ_WRITE | PG_PRESENT)
-			.long 0
-			.set i, i + 0x1000
-		.endr
+		.set i, i + 0x200000
 	.endr
 
 boot_gdt:

kernel/arch/x86_64/Signal.S

@@ -23,18 +23,12 @@ signal_trampoline:
 	pushq %r14
 	pushq %r15
 
+	// This is 16 byte aligned
+
 	movq 128(%rsp), %rdi
 	movq 120(%rsp), %rax
-
-	// align stack to 16 bytes
-	movq %rsp, %rbx
-	andq $0x0F, %rbx
-	subq %rbx, %rsp
-
 	call *%rax
 
-	// restore stack
-	addq %rbx, %rsp
 	popq %r15
 	popq %r14
 	popq %r13

kernel/include/kernel/ACPI/AML/Buffer.h

@@ -43,7 +43,7 @@ namespace Kernel::ACPI::AML
 			if (!buffer_size.has_value())
 				return ParseResult::Failure;
 
-			uint32_t actual_buffer_size = BAN::Math::max<uint32_t>(buffer_size.value(), buffer_context.aml_data.size());
+			uint32_t actual_buffer_size = BAN::Math::max(buffer_size.value(), buffer_context.aml_data.size());
 
 			auto buffer = MUST(BAN::RefPtr<Buffer>::create());
 			MUST(buffer->buffer.resize(actual_buffer_size, 0));

kernel/include/kernel/Lock/Mutex.h

@@ -103,7 +103,6 @@ namespace Kernel
 				ASSERT(m_lock_depth == 0);
 			}
 			m_lock_depth++;
-			return true;
 		}
 
 		void unlock()

kernel/include/kernel/Thread.h

@@ -94,7 +94,7 @@ namespace Kernel
 
 	private:
 		static constexpr size_t		m_kernel_stack_size		= PAGE_SIZE * 64;
-		static constexpr size_t		m_userspace_stack_size	= PAGE_SIZE * 64;
+		static constexpr size_t		m_userspace_stack_size	= PAGE_SIZE * 4;
 		BAN::UniqPtr<VirtualRange>	m_kernel_stack;
 		BAN::UniqPtr<VirtualRange>	m_userspace_stack;
 		const pid_t					m_tid				{ 0 };

kernel/kernel/ACPI/ACPI.cpp

@@ -19,10 +19,10 @@
 namespace Kernel::ACPI
 {
 
+
 	static uint32_t* s_global_lock { nullptr };
 
 	// https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html#global-lock
-#if ARCH(x86_64)
 asm(R"(
 .global acpi_acquire_global_lock
 acpi_acquire_global_lock:
@@ -54,41 +54,6 @@ acpi_release_global_lock:
 
 	ret
 )");
-#elif ARCH(i686)
-asm(R"(
-.global acpi_acquire_global_lock
-acpi_acquire_global_lock:
-	movl 4(%esp), %ecx
-	movl (%ecx), %edx
-	andl $(~1), %edx
-	btsl $1, %edx
-	adcl $0, %edx
-
-	lock cmpxchgl %edx, (%ecx)
-	jnz acpi_acquire_global_lock
-
-	cmpb $3, %dl
-	sbbl %eax, %eax
-	negl %eax
-
-	ret
-
-.global acpi_release_global_lock
-acpi_release_global_lock:
-	movl 4(%esp), %ecx
-	movl (%ecx), %eax
-	movl %eax, %edx
-
-	andl $(~3), %edx
-
-	lock cmpxchgl %edx, (%ecx)
-	jnz acpi_release_global_lock
-
-	andl $1, %eax
-
-	ret
-)");
-#endif
 
 	// returns true if lock was acquired successfully
 	extern "C" bool acpi_acquire_global_lock(uint32_t* lock);

kernel/kernel/APIC.cpp

@@ -247,13 +247,6 @@ namespace Kernel
 		uint8_t bsp_id = Kernel::Processor::current_id();
 		dprintln("BSP lapic id: {}", bsp_id);
 
-		if (m_processors.size() == 1)
-		{
-			dprintln("Only one processor, skipping AP initialization");
-			*g_ap_startup_done = 1;
-			return;
-		}
-
 		for (auto& processor : m_processors)
 		{
 			if (processor.apic_id == bsp_id)

kernel/kernel/Thread.cpp

@@ -335,9 +335,7 @@ namespace Kernel
 		else if (signal_handler != (vaddr_t)SIG_DFL)
 		{
 			// call userspace signal handlers
-#if ARCH(x86_64)
 			interrupt_stack.sp -= 128; // skip possible red-zone
-#endif
 			write_to_stack(interrupt_stack.sp, interrupt_stack.ip);
 			write_to_stack(interrupt_stack.sp, signal);
 			write_to_stack(interrupt_stack.sp, signal_handler);

kernel/kernel/Timer/PIT.cpp

@@ -47,7 +47,6 @@ namespace Kernel
 		IO::outb(TIMER0_CTL, (timer_reload >> 0) & 0xff);
 		IO::outb(TIMER0_CTL, (timer_reload >> 8) & 0xff);
 
-		MUST(InterruptController::get().reserve_irq(PIT_IRQ));
 		set_irq(PIT_IRQ);
 		enable_interrupt();
 	}