Differential D5836 Diff 14918 sys/compat/cloudabi64/cloudabi64_thread.c

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sys/compat/cloudabi64/cloudabi64_thread.c

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	#include <contrib/cloudabi/cloudabi64_types.h>			#include <contrib/cloudabi/cloudabi64_types.h>

	#include <compat/cloudabi64/cloudabi64_proto.h>			#include <compat/cloudabi64/cloudabi64_proto.h>
	#include <compat/cloudabi64/cloudabi64_util.h>			#include <compat/cloudabi64/cloudabi64_util.h>

	struct thread_create_args {			struct thread_create_args {
	cloudabi64_threadattr_t attr;			cloudabi64_threadattr_t attr;
				uint64_t tcb;
	lwpid_t tid;			lwpid_t tid;
	};			};

	static int			static int
	initialize_thread(struct thread td, void thunk)			initialize_thread(struct thread td, void thunk)
	{			{
	struct thread_create_args *args = thunk;			struct thread_create_args *args = thunk;

	/* Save the thread ID, so it can be returned. */			/* Save the thread ID, so it can be returned. */
	args->tid = td->td_tid;			args->tid = td->td_tid;

	/* Set up initial register contents. */			/* Set up initial register contents. */
	cloudabi64_thread_setregs(td, &args->attr);			return (cloudabi64_thread_setregs(td, &args->attr, args->tcb));
	return (0);
	}			}

	int			int
	cloudabi64_sys_thread_create(struct thread *td,			cloudabi64_sys_thread_create(struct thread *td,
	struct cloudabi64_sys_thread_create_args *uap)			struct cloudabi64_sys_thread_create_args *uap)
	{			{
	struct thread_create_args args;			struct thread_create_args args;
	int error;			int error;

	error = copyin(uap->attr, &args.attr, sizeof(args.attr));			error = copyin(uap->attr, &args.attr, sizeof(args.attr));
	if (error != 0)			if (error != 0)
	return (error);			return (error);

				/* Remove some space on the top of the stack for the TCB. */
				args.tcb = rounddown(args.attr.stack + args.attr.stack_size -
				sizeof(cloudabi64_tcb_t), _Alignof(cloudabi64_tcb_t));
				args.attr.stack_size = args.tcb - args.attr.stack;

	error = thread_create(td, NULL, initialize_thread, &args);			error = thread_create(td, NULL, initialize_thread, &args);
	if (error != 0)			if (error != 0)
	return (error);			return (error);
	td->td_retval[0] = args.tid;			td->td_retval[0] = args.tid;
	return (0);			return (0);
	}			}