FreeBSD/Linux Kernel Cross Reference
sys/arm64/linux/linux_machdep.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/ktr.h>
    #include <sys/proc.h>
    #include <sys/ptrace.h>
    #include <sys/reg.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_fork.h>
    #include <compat/linux/linux_misc.h>
    #include <compat/linux/linux_mmap.h>
    #include <compat/linux/linux_util.h>
    
    #define LINUX_ARCH_AARCH64              0xc00000b7
    
    /* DTrace init */
    LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
    
    /* DTrace probes */
    LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
    
    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));
    }
    
    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(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);
   }
   

Cache object: 2e92163a19f351e2710b6f5aed47592d