diff options
Diffstat (limited to 'sys/compat/cloudabi32/cloudabi32_thread.c')
-rw-r--r-- | sys/compat/cloudabi32/cloudabi32_thread.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sys/compat/cloudabi32/cloudabi32_thread.c b/sys/compat/cloudabi32/cloudabi32_thread.c new file mode 100644 index 0000000..50538d9 --- /dev/null +++ b/sys/compat/cloudabi32/cloudabi32_thread.c @@ -0,0 +1,77 @@ +/*- + * Copyright (c) 2015 Nuxi, https://nuxi.nl/ + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/proc.h> +#include <sys/systm.h> + +#include <contrib/cloudabi/cloudabi32_types.h> + +#include <compat/cloudabi32/cloudabi32_proto.h> +#include <compat/cloudabi32/cloudabi32_util.h> + +struct thread_create_args { + cloudabi32_threadattr_t attr; + uint32_t tcb; + lwpid_t tid; +}; + +static int +initialize_thread(struct thread *td, void *thunk) +{ + struct thread_create_args *args = thunk; + + /* Save the thread ID, so it can be returned. */ + args->tid = td->td_tid; + + /* Set up initial register contents. */ + return (cloudabi32_thread_setregs(td, &args->attr, args->tcb)); +} + +int +cloudabi32_sys_thread_create(struct thread *td, + struct cloudabi32_sys_thread_create_args *uap) +{ + struct thread_create_args args; + int error; + + error = copyin(uap->attr, &args.attr, sizeof(args.attr)); + if (error != 0) + 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(cloudabi32_tcb_t), _Alignof(cloudabi32_tcb_t)); + args.attr.stack_size = args.tcb - args.attr.stack; + + error = thread_create(td, NULL, initialize_thread, &args); + if (error != 0) + return (error); + td->td_retval[0] = args.tid; + return (0); +} |