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/*-
* 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 <security/audit/audit.h>
#include <machine/reg.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_mmap2, todo);
LIN_SDT_PROBE_DEFINE0(machdep, linux_rt_sigsuspend, todo);
LIN_SDT_PROBE_DEFINE0(machdep, linux_sigaltstack, 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;
if (!LUSECONVPATH(td)) {
error = exec_copyin_args(&eargs, uap->path, UIO_USERSPACE,
uap->argp, uap->envp);
} else {
LCONVPATHEXIST(td, uap->path, &path);
error = exec_copyin_args(&eargs, path, UIO_SYSSPACE,
uap->argp, uap->envp);
LFREEPATH(path);
}
if (error == 0)
error = linux_common_execve(td, &eargs);
AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td);
return (error);
}
int
linux_set_upcall(struct thread *td, register_t stack)
{
if (stack)
td->td_frame->tf_sp = stack;
/*
* The newly created Linux thread returns
* to the user space by the same path that a parent does.
*/
td->td_frame->tf_x[0] = 0;
return (0);
}
/* 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));
}
int
linux_madvise(struct thread *td, struct linux_madvise_args *uap)
{
return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav));
}
/* 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);
}
int
linux_set_cloned_tls(struct thread *td, void *desc)
{
if ((uint64_t)desc >= VM_MAXUSER_ADDRESS)
return (EPERM);
return (cpu_set_user_tls(td, desc));
}
void
bsd_to_linux_regset(struct reg *b_reg, struct linux_pt_regset *l_regset)
{
KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong),
("%s: size mismatch\n", __func__));
memcpy(l_regset->x, b_reg->x, sizeof(b_reg->x));
l_regset->x[30] = b_reg->lr;
l_regset->sp = b_reg->sp;
l_regset->pc = b_reg->elr;
l_regset->cpsr = b_reg->spsr;
}
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