src/arch/arm/freebsd/process.hh

   1 /*
   2  * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
   3  * All rights reserved.
   4  *
   5  * This software was developed by the University of Cambridge Computer
   6  * Laboratory as part of the CTSRD Project, with support from the UK Higher
   7  * Education Innovation Fund (HEIF).
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions are
  11  * met: redistributions of source code must retain the above copyright
  12  * notice, this list of conditions and the following disclaimer;
  13  * redistributions in binary form must reproduce the above copyright
  14  * notice, this list of conditions and the following disclaimer in the
  15  * documentation and/or other materials provided with the distribution;
  16  * neither the name of the copyright holders nor the names of its
  17  * contributors may be used to endorse or promote products derived from
  18  * this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef __ARCH_ARM_FREEBSD_PROCESS_HH__
  34 #define __ARCH_ARM_FREEBSD_PROCESS_HH__
  35
  36 #include <vector>
  37
  38 #include "arch/arm/process.hh"
  39
  40 class ArmFreebsdProcessBits
  41 {
  42   protected:
  43     SyscallDesc* getFreebsdDesc(int callnum);
  44
  45     struct SyscallTable
  46     {
  47         int base;
  48         SyscallDesc *descs;
  49         int size;
  50
  51         SyscallDesc *getDesc(int offset) const;
  52     };
  53
  54     std::vector<SyscallTable> syscallTables;
  55 };
  56
  57 /// A process with emulated Arm/Freebsd syscalls.
  58 class ArmFreebsdProcess32 : public ArmProcess32, public ArmFreebsdProcessBits
  59 {
  60   public:
  61     ArmFreebsdProcess32(ProcessParams * params, ObjectFile *objFile,
  62                         ObjectFile::Arch _arch);
  63
  64     void initState() override;
  65
  66     void syscall(ThreadContext *tc, Fault *fault) override;
  67
  68     /// Explicitly import the otherwise hidden getSyscallArg
  69     using ArmProcess::getSyscallArg;
  70
  71     /// A page to hold "kernel" provided functions. The name might be wrong.
  72     static const Addr commPage;
  73
  74     SyscallDesc* getDesc(int callnum) override;
  75 };
  76
  77 /// A process with emulated Arm/Freebsd syscalls.
  78 class ArmFreebsdProcess64 : public ArmProcess64, public ArmFreebsdProcessBits
  79 {
  80   public:
  81     ArmFreebsdProcess64(ProcessParams * params, ObjectFile *objFile,
  82                         ObjectFile::Arch _arch);
  83
  84     void initState() override;
  85     void syscall(ThreadContext *tc, Fault *fault) override;
  86     SyscallDesc* getDesc(int callnum) override;
  87 };
  88
  89 #endif // __ARCH_ARM_FREEBSD_PROCESS_HH__