system/kernel/thread.cpp

409 	// signal stack, if set, shall be unset.
683 		// Copy the fork args onto the stack and free them.
750 /*!	Prepares the given thread's kernel stack for executing its entry function.
753 	thread's kernel stack. A pointer to the copy's data is passed to the entry
757 	\param data Pointer to data to be copied to the thread's stack and passed
764 	uint8* stack = (uint8*)thread->kernel_stack_base;
767 	// clear (or rather invalidate) the kernel stack contents, if compiled with
771 	memset((void*)(stack + KERNEL_STACK_GUARD_PAGES * B_PAGE_SIZE), 0xcc,
774 	memset(stack, 0xcc, KERNEL_STACK_SIZE);
778 	// copy the data onto the stack, with 16-byte alignment to be on the safe
785 	clonedData = (void*)ROUNDUP((addr_t)stack, 16);
786 	stack = (uint8*)clonedData + ROUNDUP(dataSize, 16);
791 	arch_thread_init_kthread_stack(thread, stack, stackTop,
805 		// A stack has been specified. It must be large enough to hold the
813 		// No user-defined stack -- allocate one. For non-main threads the stack
814 		// will be between USER_STACK_REGION and the main thread stack area. For
824 			// Verify that the given stack size is large enough.
853 	// set the stack
928 	// create the kernel stack
947 		dprintf("create_thread: error creating kernel stack: %s!\n",
957 		// Init the thread's kernel stack. It will start executing
966 		// create the userland stack, if the thread doesn't have one yet
976 		// Init the thread's kernel stack. It will start executing
1121 			// we need a copy, since the original entry is on the thread's stack
1677 		B_PRINTF_POINTER_WIDTH, "stack");
2028 	// remember the user stack area -- we will delete it below
2293 	// delete the user stack, if this was a user thread
2295 		// We postponed deleting the user stack until now, since this way all
2297 		// threads waiting for this thread's death and some object on its stack
2298 		// will wake up before we (try to) delete the stack area. Of most
2300 		// other threads use objects on its stack -- so we want them terminated
2416 	// reset user_thread and user stack