gdb/amd64-windows-tdep.c

   1 /* Copyright (C) 2009, 2010 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include "defs.h"
  19 #include "osabi.h"
  20 #include "amd64-tdep.h"
  21 #include "solib.h"
  22 #include "solib-target.h"
  23 #include "gdbtypes.h"
  24
  25 /* The registers used to pass integer arguments during a function call.  */
  26 static int amd64_windows_dummy_call_integer_regs[] =
  27 {
  28   AMD64_RCX_REGNUM,          /* %rcx */
  29   AMD64_RDX_REGNUM,          /* %rdx */
  30   8,                         /* %r8 */
  31   9                          /* %r9 */
  32 };
  33
  34 /* Implement the "classify" method in the gdbarch_tdep structure
  35    for amd64-windows.  */
  36
  37 static void
  38 amd64_windows_classify (struct type *type, enum amd64_reg_class class[2])
  39 {
  40   switch (TYPE_CODE (type))
  41     {
  42       case TYPE_CODE_ARRAY:
  43         /* Arrays are always passed by memory.  */
  44         class[0] = class[1] = AMD64_MEMORY;
  45         break;
  46
  47       case TYPE_CODE_STRUCT:
  48       case TYPE_CODE_UNION:
  49         /* Struct/Union types whose size is 1, 2, 4, or 8 bytes
  50            are passed as if they were integers of the same size.
  51            Types of different sizes are passed by memory.  */
  52         if (TYPE_LENGTH (type) == 1
  53             || TYPE_LENGTH (type) == 2
  54             || TYPE_LENGTH (type) == 4
  55             || TYPE_LENGTH (type) == 8)
  56           {
  57             class[0] = AMD64_INTEGER;
  58             class[1] = AMD64_NO_CLASS;
  59           }
  60         else
  61           class[0] = class[1] = AMD64_MEMORY;
  62         break;
  63
  64       default:
  65         /* For all the other types, the conventions are the same as
  66            with the System V ABI.  */
  67         amd64_classify (type, class);
  68     }
  69 }
  70
  71 static void
  72 amd64_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  73 {
  74   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
  75
  76   amd64_init_abi (info, gdbarch);
  77
  78   /* On Windows, "long"s are only 32bit.  */
  79   set_gdbarch_long_bit (gdbarch, 32);
  80
  81   /* Function calls.  */
  82   tdep->call_dummy_num_integer_regs =
  83     ARRAY_SIZE (amd64_windows_dummy_call_integer_regs);
  84   tdep->call_dummy_integer_regs = amd64_windows_dummy_call_integer_regs;
  85   tdep->classify = amd64_windows_classify;
  86
  87   set_solib_ops (gdbarch, &solib_target_so_ops);
  88 }
  89
  90 void
  91 _initialize_amd64_windows_tdep (void)
  92 {
  93   gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64, GDB_OSABI_CYGWIN,
  94                           amd64_windows_init_abi);
  95 }
  96