freebsd-dev/sys/arm64/linux/linux_machdep.c
Ed Maste 1fbaf06eba Introduce arm64 linuxulator stubs
This provides stub implementations of arm64 Linux vdso and machdep,
ptrace, and futex sufficient for executing an arm64 Linux 'hello world'
binary.

Reviewed by:	andrew
Sponsored by:	Turing Robotic Industries
Differential Revision:	https://reviews.freebsd.org/D15832
2018-06-18 19:34:34 +00:00

133 lines
3.9 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018 Turing Robotic Industries Inc.
* Copyright (c) 2000 Marcel Moolenaar
*
* 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/fcntl.h>
#include <sys/imgact.h>
#include <sys/ktr.h>
#include <sys/proc.h>
#include <sys/sdt.h>
#include <arm64/linux/linux.h>
#include <arm64/linux/linux_proto.h>
#include <compat/linux/linux_dtrace.h>
#include <compat/linux/linux_emul.h>
#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_mmap.h>
#include <compat/linux/linux_util.h>
/* DTrace init */
LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
/* DTrace probes */
LIN_SDT_PROBE_DEFINE0(machdep, linux_set_upcall_kse, todo);
LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
LIN_SDT_PROBE_DEFINE0(machdep, linux_rt_sigsuspend, todo);
LIN_SDT_PROBE_DEFINE0(machdep, linux_sigaltstack, todo);
LIN_SDT_PROBE_DEFINE0(machdep, linux_set_cloned_tls, todo);
/*
* LINUXTODO: deduplicate; linux_execve is common across archs, except that on
* amd64 compat linuxulator it calls freebsd32_exec_copyin_args.
*/
int
linux_execve(struct thread *td, struct linux_execve_args *uap)
{
struct image_args eargs;
char *path;
int error;
LCONVPATHEXIST(td, uap->path, &path);
error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp,
uap->envp);
free(path, M_TEMP);
if (error == 0)
error = linux_common_execve(td, &eargs);
return (error);
}
/* LINUXTODO: implement (or deduplicate) arm64 linux_set_upcall_kse */
int
linux_set_upcall_kse(struct thread *td, register_t stack)
{
LIN_SDT_PROBE0(machdep, linux_set_upcall_kse, todo);
return (EDOOFUS);
}
/* LINUXTODO: deduplicate arm64 linux_mmap2 */
int
linux_mmap2(struct thread *td, struct linux_mmap2_args *uap)
{
LIN_SDT_PROBE0(machdep, linux_mmap2, todo);
return (linux_mmap_common(td, PTROUT(uap->addr), uap->len, uap->prot,
uap->flags, uap->fd, uap->pgoff));
}
int
linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
{
return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len,
uap->prot));
}
/* LINUXTODO: implement arm64 linux_rt_sigsuspend */
int
linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
{
LIN_SDT_PROBE0(machdep, linux_rt_sigsuspend, todo);
return (EDOOFUS);
}
/* LINUXTODO: implement arm64 linux_sigaltstack */
int
linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
{
LIN_SDT_PROBE0(machdep, linux_sigaltstack, todo);
return (EDOOFUS);
}
/* LINUXTODO: implement arm64 linux_set_cloned_tls */
int
linux_set_cloned_tls(struct thread *td, void *desc)
{
LIN_SDT_PROBE0(machdep, linux_set_cloned_tls, todo);
return (EDOOFUS);
}