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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* 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.
*/
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <sys/reg.h>
#include <vm/vm_param.h>
#include <arm64/linux/linux.h>
#include <arm64/linux/linux_proto.h>
#include <compat/linux/linux_fork.h>
#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_util.h>
#define LINUX_ARCH_AARCH64 0xc00000b7
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);
}
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, 0));
}
void
bsd_to_linux_regset(const 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;
}
void
linux_to_bsd_regset(struct reg *b_reg, const struct linux_pt_regset *l_regset)
{
KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong),
("%s: size mismatch\n", __func__));
memcpy(b_reg->x, l_regset->x, sizeof(b_reg->x));
b_reg->sp = l_regset->sp;
b_reg->elr = l_regset->pc;
b_reg->spsr = l_regset->cpsr;
}
void
linux_ptrace_get_syscall_info_machdep(const struct reg *reg,
struct syscall_info *si)
{
si->arch = LINUX_ARCH_AARCH64;
si->instruction_pointer = reg->lr;
si->stack_pointer = reg->sp;
}
int
linux_ptrace_getregs_machdep(struct thread *td __unused, pid_t pid __unused,
struct linux_pt_regset *l_regset __unused)
{
return (0);
}
int
linux_ptrace_peekuser(struct thread *td, pid_t pid, void *addr, void *data)
{
LINUX_RATELIMIT_MSG_OPT1("PTRACE_PEEKUSER offset %ld not implemented; "
"returning EINVAL", (uintptr_t)addr);
return (EINVAL);
}
int
linux_ptrace_pokeuser(struct thread *td, pid_t pid, void *addr, void *data)
{
LINUX_RATELIMIT_MSG_OPT1("PTRACE_POKEUSER offset %ld "
"not implemented; returning EINVAL", (uintptr_t)addr);
return (EINVAL);
}
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