gcc/config/i386/openbsdelf.h

   1 /* Configuration for an OpenBSD i386 target.
   2
   3    Copyright (C) 2005-2017 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define TARGET_OS_CPP_BUILTINS()                \
  22   do                                            \
  23     {                                           \
  24         OPENBSD_OS_CPP_BUILTINS();              \
  25     }                                           \
  26   while (0)
  27
  28 #undef DBX_REGISTER_NUMBER
  29 #define DBX_REGISTER_NUMBER(n) \
  30   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  31
  32 /* This must agree with <machine/_types.h>.  */
  33 #undef SIZE_TYPE
  34 #define SIZE_TYPE "long unsigned int"
  35
  36 #undef PTRDIFF_TYPE
  37 #define PTRDIFF_TYPE "long int"
  38
  39 #undef WCHAR_TYPE
  40 #define WCHAR_TYPE "int"
  41
  42 #undef WCHAR_TYPE_SIZE
  43 #define WCHAR_TYPE_SIZE 32
  44
  45 #undef WINT_TYPE
  46 #define WINT_TYPE "int"
  47
  48 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
  49    we want to retain compatibility with older gcc versions.  */
  50
  51 #undef DEFAULT_PCC_STRUCT_RETURN
  52 #define DEFAULT_PCC_STRUCT_RETURN 0
  53
  54 /* Override the default comment-starter of "/".  */
  55 #undef ASM_COMMENT_START
  56 #define ASM_COMMENT_START "#"
  57
  58 #undef ASM_APP_ON
  59 #define ASM_APP_ON "#APP\n"
  60
  61 #undef ASM_APP_OFF
  62 #define ASM_APP_OFF "#NO_APP\n"
  63
  64 /* A C statement to output to the stdio stream FILE an assembler
  65    command to advance the location counter to a multiple of 1<<LOG
  66    bytes if it is within MAX_SKIP bytes.
  67
  68    This is used to align code labels according to Intel recommendations.  */
  69
  70 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  71 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
  72   do {                                                                  \
  73     if ((LOG) != 0) {                                                   \
  74       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));  \
  75       else {                                                            \
  76         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
  77         /* Make sure that we have at least 8 byte alignment if > 8 byte \
  78            alignment is preferred.  */                                  \
  79         if ((LOG) > 3                                                   \
  80             && (1 << (LOG)) > ((MAX_SKIP) + 1)                          \
  81             && (MAX_SKIP) >= 7)                                         \
  82           fputs ("\t.p2align 3\n", (FILE));                             \
  83       }                                                                 \
  84     }                                                                   \
  85   } while (0)
  86 #endif
  87
  88 /* OpenBSD's profiler recovers all information from the stack pointer.
  89    The icky part is not here, but in <machine/profile.h>.  */
  90 #undef FUNCTION_PROFILER
  91 #define FUNCTION_PROFILER(FILE, LABELNO)  \
  92   fputs (flag_pic ? "\tcall __mcount@PLT\n": "\tcall __mcount\n", FILE);
  93
  94 #undef LINK_SPEC
  95 #define LINK_SPEC \
  96   "%{!shared:%{!nostdlib:%{!r:%{!e*:-e __start}}}} \
  97    %{shared:-shared} %{R*} \
  98    %{static:-Bstatic} \
  99    %{!static:-Bdynamic} \
 100    %{assert*} \
 101    -dynamic-linker /usr/libexec/ld.so"
 102
 103 #undef STARTFILE_SPEC
 104 #define STARTFILE_SPEC "\
 105         %{!shared: %{pg:gcrt0%O%s} %{!pg:%{p:gcrt0%O%s} %{!p:crt0%O%s}} \
 106         crtbegin%O%s} %{shared:crtbeginS%O%s}"
 107
 108 #undef ENDFILE_SPEC
 109 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
 110
 111 #define OBSD_HAS_CORRECT_SPECS
 112
 113 #define HAVE_ENABLE_EXECUTE_STACK