util/m5/src/args.cc

   1 /*
   2  * Copyright (c) 2011, 2017 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Copyright (c) 2003-2005 The Regents of The University of Michigan
  15  * All rights reserved.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions are
  19  * met: redistributions of source code must retain the above copyright
  20  * notice, this list of conditions and the following disclaimer;
  21  * redistributions in binary form must reproduce the above copyright
  22  * notice, this list of conditions and the following disclaimer in the
  23  * documentation and/or other materials provided with the distribution;
  24  * neither the name of the copyright holders nor the names of its
  25  * contributors may be used to endorse or promote products derived from
  26  * this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  32  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  33  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  34  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  35  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  36  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  37  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  38  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  */
  40
  41 #include <cinttypes>
  42 #include <cstdlib>
  43 #include <cstring>
  44
  45 #include "args.hh"
  46
  47 int
  48 parse_int_args(Args *args, uint64_t ints[], int len)
  49 {
  50     if (args->argc > len)
  51         return 0;
  52
  53 // On 32 bit platforms we need to use strtoull to do the conversion
  54 #ifdef __LP64__
  55 #define strto64 strtoul
  56 #else
  57 #define strto64 strtoull
  58 #endif
  59     for (int i = 0; i < len; ++i) {
  60         const char *arg = pop_arg(args);
  61         ints[i] = arg ? strto64(arg, NULL, 0) : 0;
  62     }
  63
  64 #undef strto64
  65     return 1;
  66 }
  67
  68 int
  69 pack_arg_into_regs(Args *args, uint64_t regs[], int num_regs)
  70 {
  71     const size_t RegSize = sizeof(regs[0]);
  72     const size_t MaxLen = num_regs * RegSize;
  73     const char *arg = pop_arg(args);
  74
  75     memset(regs, 0, MaxLen);
  76
  77     size_t len = arg ? strlen(arg) : 0;
  78
  79     if (len > MaxLen)
  80         return 0;
  81
  82     while (len) {
  83         for (int offset = 0; offset < RegSize && len; offset++, len--) {
  84             int shift = offset * 8;
  85             *regs |= (uint64_t)(uint8_t)*arg++ << shift;
  86         }
  87         regs++;
  88     }
  89     return 1;
  90 }