b792434150
Move the common kernel function signatures from machine/reg.h to a new sys/reg.h. This is in preperation for adding PT_GETREGSET to ptrace(2). Reviewed by: imp, markj Sponsored by: DARPA, AFRL (original work) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19830
148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 Turing Robotic Industries Inc.
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* Copyright (c) 2000 Marcel Moolenaar
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/fcntl.h>
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#include <sys/imgact.h>
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#include <sys/ktr.h>
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#include <sys/proc.h>
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#include <sys/reg.h>
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#include <sys/sdt.h>
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#include <security/audit/audit.h>
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#include <arm64/linux/linux.h>
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#include <arm64/linux/linux_proto.h>
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#include <compat/linux/linux_dtrace.h>
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#include <compat/linux/linux_emul.h>
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#include <compat/linux/linux_fork.h>
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#include <compat/linux/linux_misc.h>
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#include <compat/linux/linux_mmap.h>
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#include <compat/linux/linux_util.h>
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/* DTrace init */
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LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
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/* DTrace probes */
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LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
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/*
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* LINUXTODO: deduplicate; linux_execve is common across archs, except that on
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* amd64 compat linuxulator it calls freebsd32_exec_copyin_args.
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*/
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int
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linux_execve(struct thread *td, struct linux_execve_args *uap)
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{
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struct image_args eargs;
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char *path;
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int error;
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if (!LUSECONVPATH(td)) {
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error = exec_copyin_args(&eargs, uap->path, UIO_USERSPACE,
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uap->argp, uap->envp);
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} else {
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LCONVPATHEXIST(td, uap->path, &path);
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error = exec_copyin_args(&eargs, path, UIO_SYSSPACE,
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uap->argp, uap->envp);
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LFREEPATH(path);
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}
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if (error == 0)
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error = linux_common_execve(td, &eargs);
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AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td);
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return (error);
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}
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int
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linux_set_upcall(struct thread *td, register_t stack)
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{
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if (stack)
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td->td_frame->tf_sp = stack;
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/*
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* The newly created Linux thread returns
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* to the user space by the same path that a parent does.
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*/
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td->td_frame->tf_x[0] = 0;
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return (0);
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}
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/* LINUXTODO: deduplicate arm64 linux_mmap2 */
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int
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linux_mmap2(struct thread *td, struct linux_mmap2_args *uap)
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{
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LIN_SDT_PROBE0(machdep, linux_mmap2, todo);
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return (linux_mmap_common(td, PTROUT(uap->addr), uap->len, uap->prot,
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uap->flags, uap->fd, uap->pgoff));
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}
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int
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linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
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{
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return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len,
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uap->prot));
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}
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int
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linux_madvise(struct thread *td, struct linux_madvise_args *uap)
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{
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return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav));
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}
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int
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linux_set_cloned_tls(struct thread *td, void *desc)
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{
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if ((uint64_t)desc >= VM_MAXUSER_ADDRESS)
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return (EPERM);
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return (cpu_set_user_tls(td, desc));
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}
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void
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bsd_to_linux_regset(struct reg *b_reg, struct linux_pt_regset *l_regset)
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{
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KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong),
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("%s: size mismatch\n", __func__));
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memcpy(l_regset->x, b_reg->x, sizeof(b_reg->x));
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l_regset->x[30] = b_reg->lr;
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l_regset->sp = b_reg->sp;
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l_regset->pc = b_reg->elr;
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l_regset->cpsr = b_reg->spsr;
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}
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