src/arch/mips/process.cc

   1
   2 /*
   3  * Copyright (c) 2003-2004 The Regents of The University of Michigan
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met: redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer;
  10  * redistributions in binary form must reproduce the above copyright
  11  * notice, this list of conditions and the following disclaimer in the
  12  * documentation and/or other materials provided with the distribution;
  13  * neither the name of the copyright holders nor the names of its
  14  * contributors may be used to endorse or promote products derived from
  15  * this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * Authors: Gabe Black
  30  *          Ali Saidi
  31  *          Korey Sewell
  32  */
  33
  34 #include "arch/mips/isa_traits.hh"
  35 #include "arch/mips/process.hh"
  36 #include "base/loader/object_file.hh"
  37 #include "base/misc.hh"
  38 #include "cpu/thread_context.hh"
  39 #include "sim/system.hh"
  40
  41 using namespace std;
  42 using namespace MipsISA;
  43
  44 MipsLiveProcess::MipsLiveProcess(const std::string &nm, ObjectFile *objFile,
  45         System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
  46         std::vector<std::string> &argv, std::vector<std::string> &envp)
  47     : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd,
  48         argv, envp)
  49 {
  50     // Set up stack. On MIPS, stack starts at the top of kuseg
  51     // user address space. MIPS stack grows down from here
  52     stack_base = 0x7FFFFFFF;
  53
  54     // Set pointer for next thread stack.  Reserve 8M for main stack.
  55     next_thread_stack_base = stack_base - (8 * 1024 * 1024);
  56
  57     // Set up break point (Top of Heap)
  58     brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
  59     brk_point = roundUp(brk_point, VMPageSize);
  60
  61     // Set up region for mmaps. For now, start at bottom of kuseg space.
  62     mmap_start = mmap_end = 0x10000;
  63 }
  64
  65 void
  66 MipsLiveProcess::startup()
  67 {
  68     argsInit(MachineBytes, VMPageSize);
  69 }