gcc/config/arm/pe.h

   1 /* Definitions of target machine for GNU compiler, for ARM with PE obj format.
   2    Copyright (C) 1995, 1996, 1999, 2000, 2002 Free Software Foundation, Inc.
   3    Contributed by Doug Evans (dje@cygnus.com).
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 2, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 /* Enable PE specific code.  */
  23 #define ARM_PE          1
  24
  25 #define ARM_PE_FLAG_CHAR '@'
  26
  27 /* Ensure that @x. will be stripped from the function name.  */
  28 #undef SUBTARGET_NAME_ENCODING_LENGTHS
  29 #define SUBTARGET_NAME_ENCODING_LENGTHS  \
  30   case ARM_PE_FLAG_CHAR: return 3;
  31
  32 #undef  USER_LABEL_PREFIX
  33 #define USER_LABEL_PREFIX "_"
  34
  35 \f
  36 /* Run-time Target Specification.  */
  37 #undef  TARGET_VERSION
  38 #define TARGET_VERSION fputs (" (ARM/pe)", stderr)
  39
  40 /* Get tree.c to declare a target-specific specialization of
  41    merge_decl_attributes.  */
  42 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES
  43
  44 /* Support the __declspec keyword by turning them into attributes.
  45    We currently only support: naked, dllimport, and dllexport.
  46    Note that the current way we do this may result in a collision with
  47    predefined attributes later on.  This can be solved by using one attribute,
  48    say __declspec__, and passing args to it.  The problem with that approach
  49    is that args are not accumulated: each new appearance would clobber any
  50    existing args.  */
  51 #undef  SUBTARGET_CPP_SPEC
  52 #define SUBTARGET_CPP_SPEC "-D__pe__ -D__declspec(x)=__attribute__((x))"
  53
  54
  55 /* Experimental addition for pr 7885.
  56    Ignore dllimport for functions.  */
  57 #define TARGET_FLAG_NOP_FUN     (1 << 24)
  58
  59 #undef  TARGET_NOP_FUN_DLLIMPORT
  60 #define TARGET_NOP_FUN_DLLIMPORT (target_flags & TARGET_FLAG_NOP_FUN)
  61
  62 #undef  SUBTARGET_SWITCHES
  63 #define SUBTARGET_SWITCHES                                      \
  64 { "nop-fun-dllimport",            TARGET_FLAG_NOP_FUN,          \
  65   N_("Ignore dllimport attribute for functions") },             \
  66 { "no-nop-fun-dllimport",       - TARGET_FLAG_NOP_FUN, "" },
  67
  68 #undef  TARGET_DEFAULT
  69 #define TARGET_DEFAULT  (ARM_FLAG_SOFT_FLOAT | TARGET_FLAG_NOP_FUN)
  70
  71 \f
  72 #undef  WCHAR_TYPE
  73 #define WCHAR_TYPE      "short unsigned int"
  74 #undef  WCHAR_TYPE_SIZE
  75 #define WCHAR_TYPE_SIZE 16
  76
  77 /* Same as arm.h except r10 is call-saved, not fixed.  */
  78 #undef  FIXED_REGISTERS
  79 #define FIXED_REGISTERS \
  80 {                       \
  81   0,0,0,0,0,0,0,0,      \
  82   0,0,0,1,0,1,0,1,      \
  83   0,0,0,0,0,0,0,0,      \
  84   1,1,1                 \
  85 }
  86
  87 /* Same as arm.h except r10 is call-saved, not fixed.  */
  88 #undef  CALL_USED_REGISTERS
  89 #define CALL_USED_REGISTERS \
  90 {                       \
  91   1,1,1,1,0,0,0,0,      \
  92   0,0,0,1,1,1,1,1,      \
  93   1,1,1,1,0,0,0,0,      \
  94   1,1,1                 \
  95 }
  96 \f
  97 /* Define this macro if in some cases global symbols from one translation
  98    unit may not be bound to undefined symbols in another translation unit
  99    without user intervention.  For instance, under Microsoft Windows
 100    symbols must be explicitly imported from shared libraries (DLLs).  */
 101 #define MULTIPLE_SYMBOL_SPACES
 102
 103 #define TARGET_ASM_UNIQUE_SECTION arm_pe_unique_section
 104
 105 #define SUPPORTS_ONE_ONLY 1
 106
 107 /* Switch into a generic section.  */
 108 #undef TARGET_ASM_NAMED_SECTION
 109 #define TARGET_ASM_NAMED_SECTION  default_pe_asm_named_section
 110 \f
 111 /* This outputs a lot of .req's to define alias for various registers.
 112    Let's try to avoid this.  */
 113 #undef  ASM_FILE_START
 114 #define ASM_FILE_START(STREAM)                                  \
 115   do                                                            \
 116     {                                                           \
 117       asm_fprintf (STREAM, "%@ Generated by gcc %s for ARM/pe\n",\
 118            version_string);                                     \
 119       output_file_directive ((STREAM), main_input_filename);    \
 120     }                                                           \
 121   while (0)
 122
 123 /* Output a reference to a label.  */
 124 #undef  ASM_OUTPUT_LABELREF
 125 #define ASM_OUTPUT_LABELREF(STREAM, NAME)  \
 126   asm_fprintf (STREAM, "%U%s", arm_strip_name_encoding (NAME))
 127
 128 /* Output a function definition label.  */
 129 #undef  ASM_DECLARE_FUNCTION_NAME
 130 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)           \
 131   do                                                            \
 132     {                                                           \
 133       if (arm_dllexport_name_p (NAME))                          \
 134         {                                                       \
 135           drectve_section ();                                   \
 136           fprintf (STREAM, "\t.ascii \" -export:%s\"\n",        \
 137                    arm_strip_name_encoding (NAME));             \
 138           function_section (DECL);                              \
 139         }                                                       \
 140       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);           \
 141       if (TARGET_THUMB)                                         \
 142         fprintf (STREAM, "\t.code 16\n");                       \
 143       ASM_OUTPUT_LABEL (STREAM, NAME);                          \
 144     }                                                           \
 145   while (0)
 146
 147 /* Output a common block.  */
 148 #undef  ASM_OUTPUT_COMMON
 149 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 150   do                                                    \
 151     {                                                   \
 152       if (arm_dllexport_name_p (NAME))                  \
 153         {                                               \
 154           drectve_section ();                           \
 155           fprintf ((STREAM), "\t.ascii \" -export:%s\"\n",\
 156                    arm_strip_name_encoding (NAME));     \
 157         }                                               \
 158       if (! arm_dllimport_name_p (NAME))                \
 159         {                                               \
 160           fprintf ((STREAM), "\t.comm\t");              \
 161           assemble_name ((STREAM), (NAME));             \
 162           asm_fprintf ((STREAM), ", %d\t%@ %d\n",       \
 163                    (ROUNDED), (SIZE));                  \
 164         }                                               \
 165     }                                                   \
 166   while (0)
 167
 168 /* Output the label for an initialized variable.  */
 169 #undef  ASM_DECLARE_OBJECT_NAME
 170 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL)     \
 171   do                                                    \
 172     {                                                   \
 173       if (arm_dllexport_name_p (NAME))                  \
 174         {                                               \
 175           enum in_section save_section = in_section;    \
 176           drectve_section ();                           \
 177           fprintf (STREAM, "\t.ascii \" -export:%s\"\n",\
 178                    arm_strip_name_encoding (NAME));     \
 179           switch_to_section (save_section, (DECL));     \
 180         }                                               \
 181       ASM_OUTPUT_LABEL ((STREAM), (NAME));              \
 182     }                                                   \
 183   while (0)
 184 \f
 185 /* Support the ctors/dtors and other sections.  */
 186
 187 #define DRECTVE_SECTION_ASM_OP  "\t.section .drectve"
 188
 189 /* A list of other sections which the compiler might be "in" at any
 190    given time.  */
 191
 192 #undef  EXTRA_SECTIONS
 193 #define EXTRA_SECTIONS in_drectve
 194
 195 /* A list of extra section function definitions.  */
 196
 197 #undef  EXTRA_SECTION_FUNCTIONS
 198 #define EXTRA_SECTION_FUNCTIONS \
 199   DRECTVE_SECTION_FUNCTION      \
 200   SWITCH_TO_SECTION_FUNCTION
 201
 202 #define DRECTVE_SECTION_FUNCTION \
 203 void                                                                    \
 204 drectve_section ()                                                      \
 205 {                                                                       \
 206   if (in_section != in_drectve)                                         \
 207     {                                                                   \
 208       fprintf (asm_out_file, "%s\n", DRECTVE_SECTION_ASM_OP);           \
 209       in_section = in_drectve;                                          \
 210     }                                                                   \
 211 }
 212
 213 /* Switch to SECTION (an `enum in_section').
 214
 215    ??? This facility should be provided by GCC proper.
 216    The problem is that we want to temporarily switch sections in
 217    ASM_DECLARE_OBJECT_NAME and then switch back to the original section
 218    afterwards.  */
 219 #define SWITCH_TO_SECTION_FUNCTION                              \
 220 static void switch_to_section PARAMS ((enum in_section, tree)); \
 221 static void                                                     \
 222 switch_to_section (section, decl)                               \
 223      enum in_section section;                                   \
 224      tree decl;                                                 \
 225 {                                                               \
 226   switch (section)                                              \
 227     {                                                           \
 228       case in_text: text_section (); break;                     \
 229       case in_data: data_section (); break;                     \
 230       case in_named: named_section (decl, NULL, 0); break;      \
 231       case in_readonly_data: readonly_data_section (); break;   \
 232       case in_ctors: ctors_section (); break;                   \
 233       case in_dtors: dtors_section (); break;                   \
 234       case in_drectve: drectve_section (); break;               \
 235       default: abort (); break;                                 \
 236     }                                                           \
 237 }