x86/64/thread.cpp

12 #include <arch/thread.h>
25 #include <thread.h>
72 // Initial thread saved state.
84 	Thread* thread = thread_get_current_thread();
86 	atomic_and(&thread->flags, ~THREAD_FLAGS_RESTART_SYSCALL);
87 	atomic_or(&thread->flags, THREAD_FLAGS_SYSCALL_RESTARTED);
99 x86_set_tls_context(Thread* thread)
102 	x86_write_msr(IA32_MSR_FS_BASE, thread->user_local_storage);
103 	x86_write_msr(IA32_MSR_KERNEL_GS_BASE, thread->arch_info.user_gs_base);
121 get_signal_stack(Thread* thread, iframe* frame, struct sigaction* action,
125 	if (thread->signal_stack_enabled
127 			&& (frame->user_sp < thread->signal_stack_base
128 				|| frame->user_sp >= thread->signal_stack_base
129 					+ thread->signal_stack_size)) {
130 		addr_t stackTop = thread->signal_stack_base + thread->signal_stack_size;
159 			Thread* thread = thread_get_current_thread();
160 			thread->arch_info.user_gs_base = base;
176 	// part of each new thread.
216 arch_thread_init_thread_struct(Thread* thread)
218 	// Copy the initial saved FPU state to the new thread.
219 	memcpy(&thread->arch_info, &sInitialState, sizeof(arch_thread));
221 	// Initialise the current thread pointer.
222 	thread->arch_info.thread = thread;
228 /*!	Prepares the given thread's kernel stack for executing its entry function.
230 	\param thread The thread.
231 	\param stack The usable bottom of the thread's kernel stack.
232 	\param stackTop The usable top of the thread's kernel stack.
233 	\param function The entry function the thread shall execute.
237 arch_thread_init_kthread_stack(Thread* thread, void* _stack, void* _stackTop,
246 	thread->arch_info.syscall_rsp = (uint64*)thread->kernel_stack_top;
248 	thread->arch_info.instruction_pointer
255 	thread->arch_info.current_stack = stackTop;
262 	arch_thread* thread = (arch_thread*)info;
264 	kprintf("\trsp: %p\n", thread->current_stack);
265 	kprintf("\tsyscall_rsp: %p\n", thread->syscall_rsp);
266 	kprintf("\tuser_rsp: %p\n", thread->user_rsp);
267 	kprintf("\tfpu_state at %p\n", thread->fpu_state);
271 /*!	Sets up initial thread context and enters user space
274 arch_thread_enter_userspace(Thread* thread, addr_t entry, void* args1,
277 	addr_t stackTop = thread->user_stack_base + thread->user_stack_size;
285 	// Copy the address of the stub that calls exit_thread() when the thread
288 	addr_t commPageAddress = (addr_t)thread->team->commpage_address;
309 	x86_initial_return_to_userland(thread, &frame);
318 	copies it to the thread's userland stack (the one on which the signal shall
327 	- \c context.uc_stack: The stack currently used by the thread.
332 	Furthermore the function needs to set \c thread->user_signal_context to the
335 	\param thread The current thread.
342 arch_setup_signal_frame(Thread* thread, struct sigaction* action,
386 	uint8* userStack = get_signal_stack(thread, frame, action,
403 	thread->user_signal_context = &userSignalFrameData->context;
407 	addr_t* commPageAddress = (addr_t*)thread->team->commpage_address;
446 	Thread* thread = thread_get_current_thread();
448 	memcpy(thread->arch_info.fpu_state,
450 	frame->fpu = &thread->arch_info.fpu_state;